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NFSv4: Refactor NFSv4 error handling
[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>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.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"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
b3c2aa07
TM		 347static int nfs4_do_handle_exception(struct nfs_server *server,
348 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 349{
350 struct nfs_client *clp = server->nfs_client;
9e33bed5 351 struct nfs4_state *state = exception->state;
3114ea7a 352 struct inode *inode = exception->inode;
65de872e
TM		 353 int ret = errorcode;
354
b3c2aa07
TM		 355 exception->delay = 0;
356 exception->recovering = 0;
65de872e
TM		 357 exception->retry = 0;
358 switch(errorcode) {
359 case 0:
360 return 0;
3114ea7a 361 case -NFS4ERR_OPENMODE:
5ba12443
TM		 362 case -NFS4ERR_DELEG_REVOKED:
363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
011e2a7f 365 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 366 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 367 exception->retry = 1;
368 return 0;
369 }
370 if (state == NULL)
371 break;
5d422301
TM		 372 ret = nfs4_schedule_stateid_recovery(server, state);
373 if (ret < 0)
374 break;
3114ea7a 375 goto wait_on_recovery;
0ced63d1 376 case -NFS4ERR_EXPIRED:
5d422301
TM		 377 if (state != NULL) {
378 ret = nfs4_schedule_stateid_recovery(server, state);
379 if (ret < 0)
380 break;
381 }
65de872e 382 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 383 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 384 nfs4_schedule_lease_recovery(clp);
385 goto wait_on_recovery;
519ae255
CL		 386 case -NFS4ERR_MOVED:
387 ret = nfs4_schedule_migration_recovery(server);
388 if (ret < 0)
389 break;
390 goto wait_on_recovery;
8ef2f8d4
CL		 391 case -NFS4ERR_LEASE_MOVED:
392 nfs4_schedule_lease_moved_recovery(clp);
393 goto wait_on_recovery;
03391693 394#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 395 case -NFS4ERR_BADSESSION:
396 case -NFS4ERR_BADSLOT:
397 case -NFS4ERR_BAD_HIGH_SLOT:
398 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
399 case -NFS4ERR_DEADSESSION:
400 case -NFS4ERR_SEQ_FALSE_RETRY:
401 case -NFS4ERR_SEQ_MISORDERED:
402 dprintk("%s ERROR: %d Reset session\n", __func__,
403 errorcode);
9f594791 404 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 405 goto wait_on_recovery;
03391693 406#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 407 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 408 if (exception->timeout > HZ) {
409 /* We have retried a decent amount, time to
410 * fail
411 */
412 ret = -EBUSY;
413 break;
414 }
65de872e
TM		 415 case -NFS4ERR_GRACE:
416 case -NFS4ERR_DELAY:
b3c2aa07
TM		 417 exception->delay = 1;
418 return 0;
419
a8a4ae3a 420 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 421 case -NFS4ERR_OLD_STATEID:
422 exception->retry = 1;
b064eca2
TM		 423 break;
424 case -NFS4ERR_BADOWNER:
425 /* The following works around a Linux server bug! */
426 case -NFS4ERR_BADNAME:
427 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
428 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
429 exception->retry = 1;
430 printk(KERN_WARNING "NFS: v4 server %s "
431 "does not accept raw "
432 "uid/gids. "
433 "Reenabling the idmapper.\n",
434 server->nfs_client->cl_hostname);
435 }
65de872e
TM		 436 }
437 /* We failed to handle the error */
438 return nfs4_map_errors(ret);
0400a6b0 439wait_on_recovery:
b3c2aa07
TM		 440 exception->recovering = 1;
441 return 0;
442}
443
444/* This is the error handling routine for processes that are allowed
445 * to sleep.
446 */
447int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
448{
449 struct nfs_client *clp = server->nfs_client;
450 int ret;
451
452 ret = nfs4_do_handle_exception(server, errorcode, exception);
453 if (exception->delay) {
454 ret = nfs4_delay(server->client, &exception->timeout);
455 goto out_retry;
456 }
457 if (exception->recovering) {
458 ret = nfs4_wait_clnt_recover(clp);
459 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
460 return -EIO;
461 goto out_retry;
462 }
463 return ret;
464out_retry:
a2c0b9e2
TM		 465 if (ret == 0)
466 exception->retry = 1;
467 return ret;
65de872e
TM		 468}
469
a5250def
WAA		 470/*
471 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
472 * or 'false' otherwise.
473 */
474static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
475{
476 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
477
478 if (flavor == RPC_AUTH_GSS_KRB5I ||
479 flavor == RPC_AUTH_GSS_KRB5P)
480 return true;
481
482 return false;
483}
65de872e 484
452e9352 485static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 486{
1da177e4
LT		 487 spin_lock(&clp->cl_lock);
488 if (time_before(clp->cl_last_renewal,timestamp))
489 clp->cl_last_renewal = timestamp;
490 spin_unlock(&clp->cl_lock);
491}
492
452e9352
TM		 493static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
494{
be824167
TM		 495 struct nfs_client *clp = server->nfs_client;
496
497 if (!nfs4_has_session(clp))
498 do_renew_lease(clp, timestamp);
452e9352
TM		 499}
500
2a3eb2b9
CL		 501struct nfs4_call_sync_data {
502 const struct nfs_server *seq_server;
503 struct nfs4_sequence_args *seq_args;
504 struct nfs4_sequence_res *seq_res;
505};
506
be3a5d23
TM		 507void nfs4_init_sequence(struct nfs4_sequence_args *args,
508 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 509{
510 args->sa_slot = NULL;
511 args->sa_cache_this = cache_reply;
512 args->sa_privileged = 0;
513
514 res->sr_slot = NULL;
515}
516
517static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
518{
519 args->sa_privileged = 1;
520}
521
cb04ad2a
PT		 522int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
523 struct nfs4_sequence_args *args,
524 struct nfs4_sequence_res *res,
525 struct rpc_task *task)
3bd2384a 526{
3bd2384a
CL		 527 struct nfs4_slot *slot;
528
529 /* slot already allocated? */
530 if (res->sr_slot != NULL)
531 goto out_start;
532
533 spin_lock(&tbl->slot_tbl_lock);
534 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
535 goto out_sleep;
536
537 slot = nfs4_alloc_slot(tbl);
538 if (IS_ERR(slot)) {
539 if (slot == ERR_PTR(-ENOMEM))
540 task->tk_timeout = HZ >> 2;
541 goto out_sleep;
542 }
543 spin_unlock(&tbl->slot_tbl_lock);
544
545 args->sa_slot = slot;
546 res->sr_slot = slot;
547
548out_start:
549 rpc_call_start(task);
550 return 0;
551
552out_sleep:
553 if (args->sa_privileged)
554 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
555 NULL, RPC_PRIORITY_PRIVILEGED);
556 else
557 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
558 spin_unlock(&tbl->slot_tbl_lock);
559 return -EAGAIN;
560}
cb04ad2a 561EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 562
563static int nfs40_sequence_done(struct rpc_task *task,
564 struct nfs4_sequence_res *res)
565{
566 struct nfs4_slot *slot = res->sr_slot;
567 struct nfs4_slot_table *tbl;
568
cab92c19 569 if (slot == NULL)
3bd2384a
CL		 570 goto out;
571
572 tbl = slot->table;
573 spin_lock(&tbl->slot_tbl_lock);
574 if (!nfs41_wake_and_assign_slot(tbl, slot))
575 nfs4_free_slot(tbl, slot);
576 spin_unlock(&tbl->slot_tbl_lock);
577
578 res->sr_slot = NULL;
579out:
580 return 1;
581}
582
cccef3b9
AA		 583#if defined(CONFIG_NFS_V4_1)
584
d185a334 585static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 586{
e3725ec0 587 struct nfs4_session *session;
13615871 588 struct nfs4_slot_table *tbl;
a13ce7c6 589 struct nfs4_slot *slot = res->sr_slot;
c10e4498 590 bool send_new_highest_used_slotid = false;
13615871 591
a13ce7c6 592 tbl = slot->table;
e3725ec0 593 session = tbl->session;
ea028ac9 594
35dc1d74 595 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 596 /* Be nice to the server: try to ensure that the last transmitted
597 * value for highest_user_slotid <= target_highest_slotid
598 */
599 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
600 send_new_highest_used_slotid = true;
601
a13ce7c6 602 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 603 send_new_highest_used_slotid = false;
604 goto out_unlock;
605 }
a13ce7c6 606 nfs4_free_slot(tbl, slot);
c10e4498
TM		 607
608 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
609 send_new_highest_used_slotid = false;
b75ad4cd 610out_unlock:
35dc1d74 611 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 612 res->sr_slot = NULL;
c10e4498 613 if (send_new_highest_used_slotid)
3f10a6af 614 nfs41_notify_server(session->clp);
13615871
AA		 615}
616
f9c96fcc 617int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 618{
e3725ec0 619 struct nfs4_session *session;
a13ce7c6 620 struct nfs4_slot *slot = res->sr_slot;
14516c3a 621 struct nfs_client *clp;
ac20d163 622 bool interrupted = false;
85563073 623 int ret = 1;
b0df806c 624
a13ce7c6
TM		 625 if (slot == NULL)
626 goto out_noaction;
468f8613
BS		 627 /* don't increment the sequence number if the task wasn't sent */
628 if (!RPC_WAS_SENT(task))
b0df806c
AA		 629 goto out;
630
e3725ec0 631 session = slot->table->session;
933602e3 632
ac20d163
TM		 633 if (slot->interrupted) {
634 slot->interrupted = 0;
635 interrupted = true;
636 }
637
2f92ae34 638 trace_nfs4_sequence_done(session, res);
691daf3b 639 /* Check the SEQUENCE operation status */
14516c3a
TM		 640 switch (res->sr_status) {
641 case 0:
b0df806c 642 /* Update the slot's sequence and clientid lease timer */
933602e3 643 ++slot->seq_nr;
e3725ec0 644 clp = session->clp;
8e63b6a8 645 do_renew_lease(clp, res->sr_timestamp);
0629e370 646 /* Check sequence flags */
b15c7cdd 647 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 648 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 649 break;
ac20d163
TM		 650 case 1:
651 /*
652 * sr_status remains 1 if an RPC level error occurred.
653 * The server may or may not have processed the sequence
654 * operation..
655 * Mark the slot as having hosted an interrupted RPC call.
656 */
657 slot->interrupted = 1;
658 goto out;
14516c3a
TM		 659 case -NFS4ERR_DELAY:
660 /* The server detected a resend of the RPC call and
661 * returned NFS4ERR_DELAY as per Section 2.10.6.2
662 * of RFC5661.
663 */
df2fabff 664 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 665 __func__,
df2fabff 666 slot->slot_nr,
933602e3 667 slot->seq_nr);
14516c3a 668 goto out_retry;
85563073
TM		 669 case -NFS4ERR_BADSLOT:
670 /*
671 * The slot id we used was probably retired. Try again
672 * using a different slot id.
673 */
e8794440
TM		 674 goto retry_nowait;
675 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 676 /*
677 * Was the last operation on this sequence interrupted?
678 * If so, retry after bumping the sequence number.
679 */
680 if (interrupted) {
681 ++slot->seq_nr;
682 goto retry_nowait;
683 }
e8794440
TM		 684 /*
685 * Could this slot have been previously retired?
686 * If so, then the server may be expecting seq_nr = 1!
687 */
8e63b6a8
TM		 688 if (slot->seq_nr != 1) {
689 slot->seq_nr = 1;
690 goto retry_nowait;
691 }
692 break;
e8794440
TM		 693 case -NFS4ERR_SEQ_FALSE_RETRY:
694 ++slot->seq_nr;
695 goto retry_nowait;
14516c3a
TM		 696 default:
697 /* Just update the slot sequence no. */
933602e3 698 ++slot->seq_nr;
b0df806c
AA		 699 }
700out:
701 /* The session may be reset by one of the error handlers. */
702 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 703 nfs41_sequence_free_slot(res);
a13ce7c6 704out_noaction:
85563073 705 return ret;
e8794440
TM		 706retry_nowait:
707 if (rpc_restart_call_prepare(task)) {
708 task->tk_status = 0;
709 ret = 0;
710 }
711 goto out;
14516c3a 712out_retry:
d05dd4e9 713 if (!rpc_restart_call(task))
14516c3a
TM		 714 goto out;
715 rpc_delay(task, NFS4_POLL_RETRY_MAX);
716 return 0;
b0df806c 717}
f9c96fcc 718EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 719
2c4b131d 720int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 721{
e3725ec0 722 if (res->sr_slot == NULL)
14516c3a 723 return 1;
3bd2384a
CL		 724 if (!res->sr_slot->table->session)
725 return nfs40_sequence_done(task, res);
14516c3a 726 return nfs41_sequence_done(task, res);
df896455 727}
2c4b131d 728EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 729
dc70d7b3 730int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 731 struct nfs4_sequence_args *args,
732 struct nfs4_sequence_res *res,
ce5039c1
AA		 733 struct rpc_task *task)
734{
fbcd4abc
AA		 735 struct nfs4_slot *slot;
736 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 737
738 dprintk("--> %s\n", __func__);
ce5039c1 739 /* slot already allocated? */
dfb4f309 740 if (res->sr_slot != NULL)
d9afbd1b 741 goto out_success;
ce5039c1 742
fbcd4abc
AA		 743 tbl = &session->fc_slot_table;
744
69d206b5
TM		 745 task->tk_timeout = 0;
746
fbcd4abc 747 spin_lock(&tbl->slot_tbl_lock);
774d5f14 748 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 749 !args->sa_privileged) {
0b1c8fc4 750 /* The state manager will wait until the slot table is empty */
0b1c8fc4 751 dprintk("%s session is draining\n", __func__);
7b939a3f 752 goto out_sleep;
689cf5c1
AB		 753 }
754
2dc03b7f 755 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 756 if (IS_ERR(slot)) {
757 /* If out of memory, try again in 1/4 second */
758 if (slot == ERR_PTR(-ENOMEM))
759 task->tk_timeout = HZ >> 2;
fbcd4abc 760 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 761 goto out_sleep;
fbcd4abc
AA		 762 }
763 spin_unlock(&tbl->slot_tbl_lock);
764
2b2fa717 765 args->sa_slot = slot;
fbcd4abc 766
e8d92382 767 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 768 slot->slot_nr, slot->seq_nr);
fbcd4abc 769
dfb4f309 770 res->sr_slot = slot;
8e63b6a8 771 res->sr_timestamp = jiffies;
2a6e26cd 772 res->sr_status_flags = 0;
fbcd4abc
AA		 773 /*
774 * sr_status is only set in decode_sequence, and so will remain
775 * set to 1 if an rpc level failure occurs.
776 */
777 res->sr_status = 1;
2f92ae34 778 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 779out_success:
780 rpc_call_start(task);
ce5039c1 781 return 0;
7b939a3f 782out_sleep:
8fe72bac
TM		 783 /* Privileged tasks are queued with top priority */
784 if (args->sa_privileged)
1e1093c7
TM		 785 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
786 NULL, RPC_PRIORITY_PRIVILEGED);
787 else
788 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 789 spin_unlock(&tbl->slot_tbl_lock);
790 return -EAGAIN;
ce5039c1 791}
dc70d7b3 792EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 793
5a580e0a
CL		 794static int nfs4_setup_sequence(const struct nfs_server *server,
795 struct nfs4_sequence_args *args,
796 struct nfs4_sequence_res *res,
797 struct rpc_task *task)
ce5039c1 798{
035168ab 799 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 800 int ret = 0;
801
3bd2384a 802 if (!session)
cb04ad2a
PT		 803 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
804 args, res, task);
035168ab 805
e8d92382 806 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 807 __func__, session->clp, session, res->sr_slot ?
e8d92382 808 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 809
9d12b216 810 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 811
ce5039c1
AA		 812 dprintk("<-- %s status=%d\n", __func__, ret);
813 return ret;
814}
815
ce5039c1
AA		 816static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
817{
2a3eb2b9 818 struct nfs4_call_sync_data *data = calldata;
6ba7db34 819 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 820
035168ab
TM		 821 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
822
d9afbd1b 823 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 824}
825
69ab40c4
AA		 826static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
827{
2a3eb2b9 828 struct nfs4_call_sync_data *data = calldata;
69ab40c4 829
14516c3a 830 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 831}
832
17280175 833static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 834 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 835 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 836};
837
3bd2384a
CL		 838#else /* !CONFIG_NFS_V4_1 */
839
9915ea7e
CL		 840static int nfs4_setup_sequence(const struct nfs_server *server,
841 struct nfs4_sequence_args *args,
842 struct nfs4_sequence_res *res,
843 struct rpc_task *task)
844{
cb04ad2a
PT		 845 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
846 args, res, task);
9915ea7e
CL		 847}
848
2c4b131d
PT		 849int nfs4_sequence_done(struct rpc_task *task,
850 struct nfs4_sequence_res *res)
9915ea7e 851{
3bd2384a 852 return nfs40_sequence_done(task, res);
9915ea7e 853}
2c4b131d 854EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 855
856#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 857
858static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
859{
860 struct nfs4_call_sync_data *data = calldata;
861 nfs4_setup_sequence(data->seq_server,
862 data->seq_args, data->seq_res, task);
863}
864
865static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
866{
867 struct nfs4_call_sync_data *data = calldata;
868 nfs4_sequence_done(task, data->seq_res);
869}
870
871static const struct rpc_call_ops nfs40_call_sync_ops = {
872 .rpc_call_prepare = nfs40_call_sync_prepare,
873 .rpc_call_done = nfs40_call_sync_done,
874};
875
7c513058
BS		 876static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
877 struct nfs_server *server,
ce5039c1
AA		 878 struct rpc_message *msg,
879 struct nfs4_sequence_args *args,
8fe72bac 880 struct nfs4_sequence_res *res)
ce5039c1
AA		 881{
882 int ret;
883 struct rpc_task *task;
9915ea7e 884 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 885 struct nfs4_call_sync_data data = {
035168ab 886 .seq_server = server,
ce5039c1
AA		 887 .seq_args = args,
888 .seq_res = res,
ce5039c1
AA		 889 };
890 struct rpc_task_setup task_setup = {
7c513058 891 .rpc_client = clnt,
ce5039c1 892 .rpc_message = msg,
9915ea7e 893 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 894 .callback_data = &data
895 };
896
ce5039c1
AA		 897 task = rpc_run_task(&task_setup);
898 if (IS_ERR(task))
899 ret = PTR_ERR(task);
900 else {
901 ret = task->tk_status;
902 rpc_put_task(task);
903 }
904 return ret;
905}
906
7c513058
BS		 907int nfs4_call_sync(struct rpc_clnt *clnt,
908 struct nfs_server *server,
e73b83f2
BS		 909 struct rpc_message *msg,
910 struct nfs4_sequence_args *args,
911 struct nfs4_sequence_res *res,
912 int cache_reply)
913{
a9c92d6b 914 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 915 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 916}
cccef3b9 917
38478b24 918static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 919{
38478b24 920 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 921
38478b24 922 spin_lock(&dir->i_lock);
359d7d1c 923 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 924 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 925 nfs_force_lookup_revalidate(dir);
a9a4a87a 926 dir->i_version = cinfo->after;
3235b403 927 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 928 nfs_fscache_invalidate(dir);
38478b24 929 spin_unlock(&dir->i_lock);
1da177e4
LT		 930}
931
e56e0b78 932struct nfs4_opendata {
c6d00e63 933 struct kref kref;
e56e0b78
TM		 934 struct nfs_openargs o_arg;
935 struct nfs_openres o_res;
cdd4e68b
TM		 936 struct nfs_open_confirmargs c_arg;
937 struct nfs_open_confirmres c_res;
6926afd1
TM		 938 struct nfs4_string owner_name;
939 struct nfs4_string group_name;
a49c2691 940 struct nfs4_label *a_label;
e56e0b78 941 struct nfs_fattr f_attr;
1775fd3e 942 struct nfs4_label *f_label;
e56e0b78 943 struct dentry *dir;
82a2c1b7 944 struct dentry *dentry;
e56e0b78 945 struct nfs4_state_owner *owner;
aac00a8d 946 struct nfs4_state *state;
e56e0b78 947 struct iattr attrs;
26e976a8 948 unsigned long timestamp;
3e309914 949 unsigned int rpc_done : 1;
5bc2afc2 950 unsigned int file_created : 1;
bdeca1b7 951 unsigned int is_recover : 1;
24ac23ab
TM		 952 int rpc_status;
953 int cancelled;
e56e0b78
TM		 954};
955
49f9a0fa
TM		 956static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
957 int err, struct nfs4_exception *exception)
958{
959 if (err != -EINVAL)
960 return false;
961 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
962 return false;
963 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
964 exception->retry = 1;
965 return true;
966}
967
6ae37339
TM		 968static u32
969nfs4_map_atomic_open_share(struct nfs_server *server,
970 fmode_t fmode, int openflags)
971{
972 u32 res = 0;
973
974 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
975 case FMODE_READ:
976 res = NFS4_SHARE_ACCESS_READ;
977 break;
978 case FMODE_WRITE:
979 res = NFS4_SHARE_ACCESS_WRITE;
980 break;
981 case FMODE_READ|FMODE_WRITE:
982 res = NFS4_SHARE_ACCESS_BOTH;
983 }
984 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
985 goto out;
986 /* Want no delegation if we're using O_DIRECT */
987 if (openflags & O_DIRECT)
988 res |= NFS4_SHARE_WANT_NO_DELEG;
989out:
990 return res;
991}
992
49f9a0fa
TM		 993static enum open_claim_type4
994nfs4_map_atomic_open_claim(struct nfs_server *server,
995 enum open_claim_type4 claim)
996{
997 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
998 return claim;
999 switch (claim) {
1000 default:
1001 return claim;
1002 case NFS4_OPEN_CLAIM_FH:
1003 return NFS4_OPEN_CLAIM_NULL;
1004 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1005 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1006 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1007 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1008 }
1009}
2ced46c2
TM		 1010
1011static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1012{
1013 p->o_res.f_attr = &p->f_attr;
1775fd3e 1014 p->o_res.f_label = p->f_label;
c1d51931
TM		 1015 p->o_res.seqid = p->o_arg.seqid;
1016 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1017 p->o_res.server = p->o_arg.server;
5f657530 1018 p->o_res.access_request = p->o_arg.access;
2ced46c2 1019 nfs_fattr_init(&p->f_attr);
6926afd1 1020 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1021}
1022
82a2c1b7 1023static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1024 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1025 const struct iattr *attrs,
1775fd3e 1026 struct nfs4_label *label,
4a1c0893 1027 enum open_claim_type4 claim,
8535b2be 1028 gfp_t gfp_mask)
e56e0b78 1029{
82a2c1b7 1030 struct dentry *parent = dget_parent(dentry);
2b0143b5 1031 struct inode *dir = d_inode(parent);
e56e0b78 1032 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1033 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1034 struct nfs4_opendata *p;
1035
8535b2be 1036 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1037 if (p == NULL)
1038 goto err;
14c43f76
DQ		 1039
1040 p->f_label = nfs4_label_alloc(server, gfp_mask);
1041 if (IS_ERR(p->f_label))
1042 goto err_free_p;
1043
a49c2691
KM		 1044 p->a_label = nfs4_label_alloc(server, gfp_mask);
1045 if (IS_ERR(p->a_label))
1046 goto err_free_f;
1047
63f5f796
TM		 1048 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1049 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1050 if (IS_ERR(p->o_arg.seqid))
14c43f76 1051 goto err_free_label;
82a2c1b7
AV		 1052 nfs_sb_active(dentry->d_sb);
1053 p->dentry = dget(dentry);
e56e0b78
TM		 1054 p->dir = parent;
1055 p->owner = sp;
1056 atomic_inc(&sp->so_count);
dc0b027d
TM		 1057 p->o_arg.open_flags = flags;
1058 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1059 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1060 fmode, flags);
ae2bb032
WAA		 1061 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1062 * will return permission denied for all bits until close */
1063 if (!(flags & O_EXCL)) {
1064 /* ask server to check for all possible rights as results
1065 * are cached */
1066 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1067 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1068 }
7539bbab 1069 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1070 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1071 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1072 p->o_arg.name = &dentry->d_name;
e56e0b78 1073 p->o_arg.server = server;
aa9c2669 1074 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1075 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1076 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1077 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1078 switch (p->o_arg.claim) {
4a1c0893
TM		 1079 case NFS4_OPEN_CLAIM_NULL:
1080 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1081 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1082 p->o_arg.fh = NFS_FH(dir);
1083 break;
1084 case NFS4_OPEN_CLAIM_PREVIOUS:
1085 case NFS4_OPEN_CLAIM_FH:
1086 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1087 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1088 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1089 }
536e43d1 1090 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1091 __u32 verf[2];
d77d76ff 1092
e56e0b78
TM		 1093 p->o_arg.u.attrs = &p->attrs;
1094 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1095
1096 verf[0] = jiffies;
1097 verf[1] = current->pid;
1098 memcpy(p->o_arg.u.verifier.data, verf,
1099 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1100 }
cdd4e68b
TM		 1101 p->c_arg.fh = &p->o_res.fh;
1102 p->c_arg.stateid = &p->o_res.stateid;
1103 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1104 nfs4_init_opendata_res(p);
c6d00e63 1105 kref_init(&p->kref);
e56e0b78 1106 return p;
14c43f76
DQ		 1107
1108err_free_label:
a49c2691
KM		 1109 nfs4_label_free(p->a_label);
1110err_free_f:
14c43f76
DQ		 1111 nfs4_label_free(p->f_label);
1112err_free_p:
e56e0b78
TM		 1113 kfree(p);
1114err:
1115 dput(parent);
1116 return NULL;
1117}
1118
c6d00e63 1119static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1120{
c6d00e63
TM		 1121 struct nfs4_opendata *p = container_of(kref,
1122 struct nfs4_opendata, kref);
82a2c1b7 1123 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1124
1125 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1126 if (p->state != NULL)
1127 nfs4_put_open_state(p->state);
c6d00e63 1128 nfs4_put_state_owner(p->owner);
14c43f76 1129
a49c2691 1130 nfs4_label_free(p->a_label);
14c43f76
DQ		 1131 nfs4_label_free(p->f_label);
1132
c6d00e63 1133 dput(p->dir);
82a2c1b7
AV		 1134 dput(p->dentry);
1135 nfs_sb_deactive(sb);
6926afd1 1136 nfs_fattr_free_names(&p->f_attr);
e911b815 1137 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1138 kfree(p);
1139}
1140
1141static void nfs4_opendata_put(struct nfs4_opendata *p)
1142{
1143 if (p != NULL)
1144 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1145}
1146
06f814a3
TM		 1147static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1148{
06f814a3
TM		 1149 int ret;
1150
06f814a3 1151 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1152 return ret;
1153}
1154
24311f88
TM		 1155static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1156 fmode_t fmode)
1157{
1158 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1159 case FMODE_READ|FMODE_WRITE:
1160 return state->n_rdwr != 0;
1161 case FMODE_WRITE:
1162 return state->n_wronly != 0;
1163 case FMODE_READ:
1164 return state->n_rdonly != 0;
1165 }
1166 WARN_ON_ONCE(1);
1167 return false;
1168}
1169
dc0b027d 1170static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1171{
1172 int ret = 0;
dc0b027d 1173
536e43d1 1174 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1175 goto out;
1176 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1177 case FMODE_READ:
88069f77
TM		 1178 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1179 && state->n_rdonly != 0;
6ee41268
TM		 1180 break;
1181 case FMODE_WRITE:
88069f77
TM		 1182 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1183 && state->n_wronly != 0;
6ee41268
TM		 1184 break;
1185 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1186 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1187 && state->n_rdwr != 0;
6ee41268 1188 }
dc0b027d 1189out:
6ee41268
TM		 1190 return ret;
1191}
1192
2a606188
TM		 1193static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1194 enum open_claim_type4 claim)
aac00a8d 1195{
652f89f6
TM		 1196 if (delegation == NULL)
1197 return 0;
dc0b027d 1198 if ((delegation->type & fmode) != fmode)
aac00a8d 1199 return 0;
d25be546
TM		 1200 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1201 return 0;
2a606188
TM		 1202 switch (claim) {
1203 case NFS4_OPEN_CLAIM_NULL:
1204 case NFS4_OPEN_CLAIM_FH:
1205 break;
1206 case NFS4_OPEN_CLAIM_PREVIOUS:
1207 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1208 break;
1209 default:
1210 return 0;
1211 }
b7391f44 1212 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1213 return 1;
1214}
1215
dc0b027d 1216static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1217{
dc0b027d 1218 switch (fmode) {
e7616923
TM		 1219 case FMODE_WRITE:
1220 state->n_wronly++;
1221 break;
1222 case FMODE_READ:
1223 state->n_rdonly++;
1224 break;
1225 case FMODE_READ|FMODE_WRITE:
1226 state->n_rdwr++;
1227 }
dc0b027d 1228 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1229}
1230
4f14c194
TM		 1231static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1232{
1233 struct nfs_client *clp = state->owner->so_server->nfs_client;
1234 bool need_recover = false;
1235
1236 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1237 need_recover = true;
1238 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1239 need_recover = true;
1240 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1241 need_recover = true;
1242 if (need_recover)
1243 nfs4_state_mark_reclaim_nograce(clp, state);
1244}
1245
e999e80e
TM		 1246static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1247 nfs4_stateid *stateid)
1248{
1249 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1250 return true;
4f14c194
TM		 1251 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1252 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1253 return true;
4f14c194 1254 }
e999e80e
TM		 1255 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1256 return true;
1257 return false;
1258}
1259
f95549cf
TM		 1260static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1261{
3c38cbe2
TM		 1262 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1263 return;
f95549cf
TM		 1264 if (state->n_wronly)
1265 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1266 if (state->n_rdonly)
1267 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1268 if (state->n_rdwr)
1269 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1270 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1271}
1272
226056c5 1273static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1274 nfs4_stateid *arg_stateid,
226056c5 1275 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1276{
226056c5
TM		 1277 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1278 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1279 case FMODE_WRITE:
1280 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1281 break;
1282 case FMODE_READ:
1283 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1284 break;
1285 case 0:
1286 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1287 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1288 clear_bit(NFS_OPEN_STATE, &state->flags);
1289 }
1290 if (stateid == NULL)
1291 return;
f95549cf 1292 /* Handle races with OPEN */
4a1e2feb
TM		 1293 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1294 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1295 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1296 nfs_resync_open_stateid_locked(state);
226056c5 1297 return;
f95549cf 1298 }
003707c7 1299 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1300 nfs4_stateid_copy(&state->stateid, stateid);
1301 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1302}
1303
4a1e2feb
TM		 1304static void nfs_clear_open_stateid(struct nfs4_state *state,
1305 nfs4_stateid *arg_stateid,
1306 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1307{
1308 write_seqlock(&state->seqlock);
4a1e2feb 1309 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1310 write_sequnlock(&state->seqlock);
4f14c194
TM		 1311 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1312 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1313}
1314
dc0b027d 1315static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1316{
dc0b027d 1317 switch (fmode) {
003707c7
TM		 1318 case FMODE_READ:
1319 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1320 break;
1321 case FMODE_WRITE:
1322 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1323 break;
1324 case FMODE_READ|FMODE_WRITE:
1325 set_bit(NFS_O_RDWR_STATE, &state->flags);
1326 }
e999e80e
TM		 1327 if (!nfs_need_update_open_stateid(state, stateid))
1328 return;
1329 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1330 nfs4_stateid_copy(&state->stateid, stateid);
1331 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1332}
1333
dc0b027d 1334static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1335{
8bda4e4c
TM		 1336 /*
1337 * Protect the call to nfs4_state_set_mode_locked and
1338 * serialise the stateid update
1339 */
1340 write_seqlock(&state->seqlock);
003707c7 1341 if (deleg_stateid != NULL) {
f597c537 1342 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1343 set_bit(NFS_DELEGATED_STATE, &state->flags);
1344 }
1345 if (open_stateid != NULL)
dc0b027d 1346 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1347 write_sequnlock(&state->seqlock);
1348 spin_lock(&state->owner->so_lock);
dc0b027d 1349 update_open_stateflags(state, fmode);
ec073428 1350 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1351}
1352
dc0b027d 1353static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1354{
1355 struct nfs_inode *nfsi = NFS_I(state->inode);
1356 struct nfs_delegation *deleg_cur;
1357 int ret = 0;
1358
dc0b027d 1359 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1360
1361 rcu_read_lock();
1362 deleg_cur = rcu_dereference(nfsi->delegation);
1363 if (deleg_cur == NULL)
1364 goto no_delegation;
1365
1366 spin_lock(&deleg_cur->lock);
17f26b12 1367 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1368 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1369 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1370 goto no_delegation_unlock;
1371
1372 if (delegation == NULL)
1373 delegation = &deleg_cur->stateid;
f597c537 1374 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1375 goto no_delegation_unlock;
1376
b7391f44 1377 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1378 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1379 ret = 1;
1380no_delegation_unlock:
1381 spin_unlock(&deleg_cur->lock);
1382no_delegation:
1383 rcu_read_unlock();
1384
1385 if (!ret && open_stateid != NULL) {
dc0b027d 1386 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1387 ret = 1;
1388 }
4f14c194
TM		 1389 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1390 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1391
1392 return ret;
1393}
1394
39071e6f
TM		 1395static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1396 const nfs4_stateid *stateid)
1397{
1398 struct nfs4_state *state = lsp->ls_state;
1399 bool ret = false;
1400
1401 spin_lock(&state->state_lock);
1402 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1403 goto out_noupdate;
1404 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1405 goto out_noupdate;
1406 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1407 ret = true;
1408out_noupdate:
1409 spin_unlock(&state->state_lock);
1410 return ret;
1411}
34310430 1412
dc0b027d 1413static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1414{
1415 struct nfs_delegation *delegation;
1416
1417 rcu_read_lock();
1418 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1419 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1420 rcu_read_unlock();
1421 return;
1422 }
1423 rcu_read_unlock();
57ec14c5 1424 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1425}
1426
6ee41268 1427static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1428{
1429 struct nfs4_state *state = opendata->state;
1430 struct nfs_inode *nfsi = NFS_I(state->inode);
1431 struct nfs_delegation *delegation;
f448badd 1432 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1433 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1434 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1435 nfs4_stateid stateid;
1436 int ret = -EAGAIN;
1437
aac00a8d 1438 for (;;) {
61beef75 1439 spin_lock(&state->owner->so_lock);
dc0b027d 1440 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1441 update_open_stateflags(state, fmode);
6ee41268 1442 spin_unlock(&state->owner->so_lock);
61beef75 1443 goto out_return_state;
6ee41268 1444 }
61beef75 1445 spin_unlock(&state->owner->so_lock);
34310430
TM		 1446 rcu_read_lock();
1447 delegation = rcu_dereference(nfsi->delegation);
2a606188 1448 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1449 rcu_read_unlock();
aac00a8d 1450 break;
34310430 1451 }
aac00a8d 1452 /* Save the delegation */
f597c537 1453 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1454 rcu_read_unlock();
fa332941 1455 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1456 if (!opendata->is_recover) {
1457 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1458 if (ret != 0)
1459 goto out;
1460 }
aac00a8d 1461 ret = -EAGAIN;
34310430
TM		 1462
1463 /* Try to update the stateid using the delegation */
dc0b027d 1464 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1465 goto out_return_state;
aac00a8d 1466 }
aac00a8d
TM		 1467out:
1468 return ERR_PTR(ret);
1469out_return_state:
1470 atomic_inc(&state->count);
1471 return state;
1472}
1473
e23008ec
AA		 1474static void
1475nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1476{
1477 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1478 struct nfs_delegation *delegation;
1479 int delegation_flags = 0;
1480
1481 rcu_read_lock();
1482 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1483 if (delegation)
1484 delegation_flags = delegation->flags;
1485 rcu_read_unlock();
72d79ff8
TM		 1486 switch (data->o_arg.claim) {
1487 default:
1488 break;
1489 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1490 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1491 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1492 "returning a delegation for "
1493 "OPEN(CLAIM_DELEGATE_CUR)\n",
1494 clp->cl_hostname);
72d79ff8
TM		 1495 return;
1496 }
1497 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1498 nfs_inode_set_delegation(state->inode,
1499 data->owner->so_cred,
1500 &data->o_res);
1501 else
1502 nfs_inode_reclaim_delegation(state->inode,
1503 data->owner->so_cred,
1504 &data->o_res);
1505}
1506
1507/*
1508 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1509 * and update the nfs4_state.
1510 */
1511static struct nfs4_state *
1512_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1513{
1514 struct inode *inode = data->state->inode;
1515 struct nfs4_state *state = data->state;
1516 int ret;
1517
d2bfda2e
WAA		 1518 if (!data->rpc_done) {
1519 if (data->rpc_status) {
1520 ret = data->rpc_status;
1521 goto err;
1522 }
1523 /* cached opens have already been processed */
1524 goto update;
e23008ec
AA		 1525 }
1526
e23008ec
AA		 1527 ret = nfs_refresh_inode(inode, &data->f_attr);
1528 if (ret)
1529 goto err;
1530
1531 if (data->o_res.delegation_type != 0)
1532 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1533update:
e23008ec
AA		 1534 update_open_stateid(state, &data->o_res.stateid, NULL,
1535 data->o_arg.fmode);
d49f042a 1536 atomic_inc(&state->count);
e23008ec
AA		 1537
1538 return state;
1539err:
1540 return ERR_PTR(ret);
1541
1542}
1543
1544static struct nfs4_state *
1545_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1546{
1547 struct inode *inode;
1548 struct nfs4_state *state = NULL;
1b370bc2 1549 int ret;
24ac23ab 1550
aac00a8d 1551 if (!data->rpc_done) {
6ee41268 1552 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1553 goto out;
1554 }
1555
1b370bc2 1556 ret = -EAGAIN;
24ac23ab 1557 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1558 goto err;
1775fd3e 1559 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1560 ret = PTR_ERR(inode);
03f28e3a 1561 if (IS_ERR(inode))
1b370bc2
TM		 1562 goto err;
1563 ret = -ENOMEM;
24ac23ab
TM		 1564 state = nfs4_get_open_state(inode, data->owner);
1565 if (state == NULL)
1b370bc2 1566 goto err_put_inode;
e23008ec
AA		 1567 if (data->o_res.delegation_type != 0)
1568 nfs4_opendata_check_deleg(data, state);
34310430 1569 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1570 data->o_arg.fmode);
24ac23ab 1571 iput(inode);
aac00a8d 1572out:
7aa262b5 1573 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1574 return state;
1b370bc2
TM		 1575err_put_inode:
1576 iput(inode);
1577err:
1578 return ERR_PTR(ret);
24ac23ab
TM		 1579}
1580
e23008ec
AA		 1581static struct nfs4_state *
1582nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1583{
1584 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1585 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1586 return _nfs4_opendata_to_nfs4_state(data);
1587}
1588
864472e9
TM		 1589static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1590{
1591 struct nfs_inode *nfsi = NFS_I(state->inode);
1592 struct nfs_open_context *ctx;
1593
1594 spin_lock(&state->inode->i_lock);
1595 list_for_each_entry(ctx, &nfsi->open_files, list) {
1596 if (ctx->state != state)
1597 continue;
1598 get_nfs_open_context(ctx);
1599 spin_unlock(&state->inode->i_lock);
1600 return ctx;
1601 }
1602 spin_unlock(&state->inode->i_lock);
1603 return ERR_PTR(-ENOENT);
1604}
1605
4a1c0893
TM		 1606static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1607 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1608{
1609 struct nfs4_opendata *opendata;
1610
4a1c0893 1611 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1612 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1613 if (opendata == NULL)
1614 return ERR_PTR(-ENOMEM);
1615 opendata->state = state;
1616 atomic_inc(&state->count);
1617 return opendata;
1618}
1619
24311f88
TM		 1620static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1621 fmode_t fmode)
864472e9 1622{
2ced46c2 1623 struct nfs4_state *newstate;
864472e9
TM		 1624 int ret;
1625
24311f88 1626 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1627 return 0;
dc0b027d
TM		 1628 opendata->o_arg.open_flags = 0;
1629 opendata->o_arg.fmode = fmode;
be36e185
TM		 1630 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1631 NFS_SB(opendata->dentry->d_sb),
1632 fmode, 0);
2ced46c2
TM		 1633 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1634 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1635 nfs4_init_opendata_res(opendata);
b257957e 1636 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1637 if (ret != 0)
1638 return ret;
2ced46c2 1639 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1640 if (IS_ERR(newstate))
1641 return PTR_ERR(newstate);
24311f88
TM		 1642 if (newstate != opendata->state)
1643 ret = -ESTALE;
643168c2 1644 nfs4_close_state(newstate, fmode);
24311f88 1645 return ret;
864472e9
TM		 1646}
1647
1648static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1649{
864472e9
TM		 1650 int ret;
1651
4f14c194
TM		 1652 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1653 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1654 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1655 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1656 /* memory barrier prior to reading state->n_* */
2ced46c2 1657 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1658 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1659 smp_rmb();
24311f88
TM		 1660 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1661 if (ret != 0)
1662 return ret;
1663 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1664 if (ret != 0)
1665 return ret;
1666 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1667 if (ret != 0)
1668 return ret;
1ac7e2fd
TM		 1669 /*
1670 * We may have performed cached opens for all three recoveries.
1671 * Check if we need to update the current stateid.
1672 */
1673 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1674 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1675 write_seqlock(&state->seqlock);
1ac7e2fd 1676 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1677 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1678 write_sequnlock(&state->seqlock);
1ac7e2fd 1679 }
864472e9
TM		 1680 return 0;
1681}
1682
1da177e4
LT		 1683/*
1684 * OPEN_RECLAIM:
1685 * reclaim state on the server after a reboot.
1da177e4 1686 */
539cd03a 1687static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1688{
1ac7e2fd 1689 struct nfs_delegation *delegation;
864472e9 1690 struct nfs4_opendata *opendata;
dc0b027d 1691 fmode_t delegation_type = 0;
1da177e4
LT		 1692 int status;
1693
4a1c0893
TM		 1694 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1695 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1696 if (IS_ERR(opendata))
1697 return PTR_ERR(opendata);
1ac7e2fd
TM		 1698 rcu_read_lock();
1699 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1700 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1701 delegation_type = delegation->type;
1ac7e2fd 1702 rcu_read_unlock();
864472e9
TM		 1703 opendata->o_arg.u.delegation_type = delegation_type;
1704 status = nfs4_open_recover(opendata, state);
c6d00e63 1705 nfs4_opendata_put(opendata);
1da177e4
LT		 1706 return status;
1707}
1708
539cd03a 1709static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1710{
1711 struct nfs_server *server = NFS_SERVER(state->inode);
1712 struct nfs4_exception exception = { };
1713 int err;
1714 do {
539cd03a 1715 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1716 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1717 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1718 continue;
168667c4 1719 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1720 break;
1721 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1722 } while (exception.retry);
1723 return err;
1724}
1725
864472e9
TM		 1726static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1727{
1728 struct nfs_open_context *ctx;
1729 int ret;
1730
1731 ctx = nfs4_state_find_open_context(state);
1732 if (IS_ERR(ctx))
91876b13 1733 return -EAGAIN;
539cd03a 1734 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1735 put_nfs_open_context(ctx);
1736 return ret;
1737}
1738
db4f2e63 1739static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1740{
be76b5b6
TM		 1741 switch (err) {
1742 default:
1743 printk(KERN_ERR "NFS: %s: unhandled error "
1744 "%d.\n", __func__, err);
1745 case 0:
1746 case -ENOENT:
8eee52af 1747 case -EAGAIN:
be76b5b6
TM		 1748 case -ESTALE:
1749 break;
1750 case -NFS4ERR_BADSESSION:
1751 case -NFS4ERR_BADSLOT:
1752 case -NFS4ERR_BAD_HIGH_SLOT:
1753 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1754 case -NFS4ERR_DEADSESSION:
1755 set_bit(NFS_DELEGATED_STATE, &state->flags);
1756 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1757 return -EAGAIN;
1758 case -NFS4ERR_STALE_CLIENTID:
1759 case -NFS4ERR_STALE_STATEID:
1760 set_bit(NFS_DELEGATED_STATE, &state->flags);
1761 case -NFS4ERR_EXPIRED:
1762 /* Don't recall a delegation if it was lost */
1763 nfs4_schedule_lease_recovery(server->nfs_client);
1764 return -EAGAIN;
352297b9
CL		 1765 case -NFS4ERR_MOVED:
1766 nfs4_schedule_migration_recovery(server);
1767 return -EAGAIN;
8ef2f8d4
CL		 1768 case -NFS4ERR_LEASE_MOVED:
1769 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1770 return -EAGAIN;
be76b5b6
TM		 1771 case -NFS4ERR_DELEG_REVOKED:
1772 case -NFS4ERR_ADMIN_REVOKED:
1773 case -NFS4ERR_BAD_STATEID:
db4f2e63 1774 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1775 nfs_inode_find_state_and_recover(state->inode,
1776 stateid);
1777 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1778 return -EAGAIN;
be76b5b6
TM		 1779 case -NFS4ERR_DELAY:
1780 case -NFS4ERR_GRACE:
1781 set_bit(NFS_DELEGATED_STATE, &state->flags);
1782 ssleep(1);
1783 return -EAGAIN;
db4f2e63
TM		 1784 case -ENOMEM:
1785 case -NFS4ERR_DENIED:
1786 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1787 return 0;
be76b5b6 1788 }
1da177e4
LT		 1789 return err;
1790}
1791
24311f88
TM		 1792int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1793 struct nfs4_state *state, const nfs4_stateid *stateid,
1794 fmode_t type)
db4f2e63
TM		 1795{
1796 struct nfs_server *server = NFS_SERVER(state->inode);
1797 struct nfs4_opendata *opendata;
24311f88 1798 int err = 0;
db4f2e63
TM		 1799
1800 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1801 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1802 if (IS_ERR(opendata))
1803 return PTR_ERR(opendata);
1804 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1805 write_seqlock(&state->seqlock);
1806 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1807 write_sequnlock(&state->seqlock);
24311f88
TM		 1808 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1809 switch (type & (FMODE_READ|FMODE_WRITE)) {
1810 case FMODE_READ|FMODE_WRITE:
1811 case FMODE_WRITE:
1812 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1813 if (err)
1814 break;
1815 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1816 if (err)
1817 break;
1818 case FMODE_READ:
1819 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1820 }
db4f2e63
TM		 1821 nfs4_opendata_put(opendata);
1822 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1823}
1824
be05c860
CL		 1825static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1826{
1827 struct nfs4_opendata *data = calldata;
1828
cb04ad2a
PT		 1829 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1830 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1831}
1832
cdd4e68b
TM		 1833static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1834{
1835 struct nfs4_opendata *data = calldata;
1836
17ead6c8 1837 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1838
cdd4e68b 1839 data->rpc_status = task->tk_status;
26e976a8 1840 if (data->rpc_status == 0) {
f597c537 1841 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1842 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1843 renew_lease(data->o_res.server, data->timestamp);
3e309914 1844 data->rpc_done = 1;
26e976a8 1845 }
cdd4e68b
TM		 1846}
1847
1848static void nfs4_open_confirm_release(void *calldata)
1849{
1850 struct nfs4_opendata *data = calldata;
1851 struct nfs4_state *state = NULL;
1852
1853 /* If this request hasn't been cancelled, do nothing */
1854 if (data->cancelled == 0)
1855 goto out_free;
1856 /* In case of error, no cleanup! */
3e309914 1857 if (!data->rpc_done)
cdd4e68b 1858 goto out_free;
cdd4e68b 1859 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1860 if (!IS_ERR(state))
643168c2 1861 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1862out_free:
c6d00e63 1863 nfs4_opendata_put(data);
cdd4e68b
TM		 1864}
1865
1866static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1867 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1868 .rpc_call_done = nfs4_open_confirm_done,
1869 .rpc_release = nfs4_open_confirm_release,
1870};
1871
1872/*
1873 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1874 */
1875static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1876{
2b0143b5 1877 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1878 struct rpc_task *task;
5138fde0
TM		 1879 struct rpc_message msg = {
1880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1881 .rpc_argp = &data->c_arg,
1882 .rpc_resp = &data->c_res,
1883 .rpc_cred = data->owner->so_cred,
1884 };
c970aa85
TM		 1885 struct rpc_task_setup task_setup_data = {
1886 .rpc_client = server->client,
5138fde0 1887 .rpc_message = &msg,
c970aa85
TM		 1888 .callback_ops = &nfs4_open_confirm_ops,
1889 .callback_data = data,
101070ca 1890 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1891 .flags = RPC_TASK_ASYNC,
1892 };
1da177e4
LT		 1893 int status;
1894
17ead6c8 1895 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1896 kref_get(&data->kref);
3e309914
TM		 1897 data->rpc_done = 0;
1898 data->rpc_status = 0;
5138fde0 1899 data->timestamp = jiffies;
e92c1e0d
BC		 1900 if (data->is_recover)
1901 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1902 task = rpc_run_task(&task_setup_data);
7a1218a2 1903 if (IS_ERR(task))
cdd4e68b 1904 return PTR_ERR(task);
cdd4e68b
TM		 1905 status = nfs4_wait_for_completion_rpc_task(task);
1906 if (status != 0) {
1907 data->cancelled = 1;
1908 smp_wmb();
1909 } else
1910 status = data->rpc_status;
e6b3c4db 1911 rpc_put_task(task);
1da177e4
LT		 1912 return status;
1913}
1914
24ac23ab 1915static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1916{
24ac23ab
TM		 1917 struct nfs4_opendata *data = calldata;
1918 struct nfs4_state_owner *sp = data->owner;
549b19cc 1919 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1920 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1921
24ac23ab 1922 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1923 goto out_wait;
aac00a8d
TM		 1924 /*
1925 * Check if we still need to send an OPEN call, or if we can use
1926 * a delegation instead.
1927 */
1928 if (data->state != NULL) {
1929 struct nfs_delegation *delegation;
1930
dc0b027d 1931 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1932 goto out_no_action;
aac00a8d
TM		 1933 rcu_read_lock();
1934 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1935 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1936 goto unlock_no_action;
aac00a8d
TM		 1937 rcu_read_unlock();
1938 }
95b72eb0 1939 /* Update client id. */
549b19cc 1940 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1941 switch (claim) {
1942 default:
1943 break;
8188df17
TM		 1944 case NFS4_OPEN_CLAIM_PREVIOUS:
1945 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1946 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1947 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1948 case NFS4_OPEN_CLAIM_FH:
1949 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1950 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1951 }
26e976a8 1952 data->timestamp = jiffies;
035168ab 1953 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1954 &data->o_arg.seq_args,
2240a9e2
TM		 1955 &data->o_res.seq_res,
1956 task) != 0)
1957 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1958
1959 /* Set the create mode (note dependency on the session type) */
1960 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1961 if (data->o_arg.open_flags & O_EXCL) {
1962 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1963 if (nfs4_has_persistent_session(clp))
1964 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1965 else if (clp->cl_mvops->minor_version > 0)
1966 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1967 }
6ee41268 1968 return;
652f89f6
TM		 1969unlock_no_action:
1970 rcu_read_unlock();
6ee41268
TM		 1971out_no_action:
1972 task->tk_action = NULL;
c8da19b9 1973out_wait:
b75ad4cd 1974 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1975}
1976
24ac23ab
TM		 1977static void nfs4_open_done(struct rpc_task *task, void *calldata)
1978{
1979 struct nfs4_opendata *data = calldata;
1da177e4 1980
24ac23ab 1981 data->rpc_status = task->tk_status;
d898528c 1982
14516c3a
TM		 1983 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1984 return;
d898528c 1985
24ac23ab 1986 if (task->tk_status == 0) {
807d66d8
TM		 1987 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1988 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1989 case S_IFREG:
1990 break;
1991 case S_IFLNK:
24ac23ab 1992 data->rpc_status = -ELOOP;
6f926b5b
TM		 1993 break;
1994 case S_IFDIR:
24ac23ab 1995 data->rpc_status = -EISDIR;
6f926b5b
TM		 1996 break;
1997 default:
24ac23ab 1998 data->rpc_status = -ENOTDIR;
807d66d8 1999 }
6f926b5b 2000 }
26e976a8 2001 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2002 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2003 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2004 }
3e309914 2005 data->rpc_done = 1;
24ac23ab 2006}
6f926b5b 2007
24ac23ab
TM		 2008static void nfs4_open_release(void *calldata)
2009{
2010 struct nfs4_opendata *data = calldata;
2011 struct nfs4_state *state = NULL;
2012
2013 /* If this request hasn't been cancelled, do nothing */
2014 if (data->cancelled == 0)
2015 goto out_free;
2016 /* In case of error, no cleanup! */
3e309914 2017 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2018 goto out_free;
2019 /* In case we need an open_confirm, no cleanup! */
2020 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2021 goto out_free;
24ac23ab 2022 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2023 if (!IS_ERR(state))
643168c2 2024 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2025out_free:
c6d00e63 2026 nfs4_opendata_put(data);
24ac23ab
TM		 2027}
2028
2029static const struct rpc_call_ops nfs4_open_ops = {
2030 .rpc_call_prepare = nfs4_open_prepare,
2031 .rpc_call_done = nfs4_open_done,
2032 .rpc_release = nfs4_open_release,
2033};
2034
b257957e 2035static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2036{
2b0143b5 2037 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2038 struct nfs_server *server = NFS_SERVER(dir);
2039 struct nfs_openargs *o_arg = &data->o_arg;
2040 struct nfs_openres *o_res = &data->o_res;
2041 struct rpc_task *task;
5138fde0
TM		 2042 struct rpc_message msg = {
2043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2044 .rpc_argp = o_arg,
2045 .rpc_resp = o_res,
2046 .rpc_cred = data->owner->so_cred,
2047 };
c970aa85
TM		 2048 struct rpc_task_setup task_setup_data = {
2049 .rpc_client = server->client,
5138fde0 2050 .rpc_message = &msg,
c970aa85
TM		 2051 .callback_ops = &nfs4_open_ops,
2052 .callback_data = data,
101070ca 2053 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2054 .flags = RPC_TASK_ASYNC,
2055 };
24ac23ab
TM		 2056 int status;
2057
a9c92d6b 2058 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2059 kref_get(&data->kref);
3e309914
TM		 2060 data->rpc_done = 0;
2061 data->rpc_status = 0;
2ced46c2 2062 data->cancelled = 0;
bdeca1b7
TM		 2063 data->is_recover = 0;
2064 if (isrecover) {
8fe72bac 2065 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2066 data->is_recover = 1;
2067 }
c970aa85 2068 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2069 if (IS_ERR(task))
2070 return PTR_ERR(task);
2071 status = nfs4_wait_for_completion_rpc_task(task);
2072 if (status != 0) {
2073 data->cancelled = 1;
2074 smp_wmb();
2075 } else
2076 status = data->rpc_status;
2077 rpc_put_task(task);
2078
2079 return status;
2080}
2081
2082static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2083{
2b0143b5 2084 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2085 struct nfs_openres *o_res = &data->o_res;
2086 int status;
2087
2088 status = nfs4_run_open_task(data, 1);
2089 if (status != 0 || !data->rpc_done)
2090 return status;
2091
6926afd1
TM		 2092 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2093
b257957e
AB		 2094 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2095 status = _nfs4_proc_open_confirm(data);
2096 if (status != 0)
2097 return status;
2098 }
2099
2100 return status;
2101}
2102
f3792d63
TM		 2103/*
2104 * Additional permission checks in order to distinguish between an
2105 * open for read, and an open for execute. This works around the
2106 * fact that NFSv4 OPEN treats read and execute permissions as being
2107 * the same.
2108 * Note that in the non-execute case, we want to turn off permission
2109 * checking if we just created a new file (POSIX open() semantics).
2110 */
6168f62c
WAA		 2111static int nfs4_opendata_access(struct rpc_cred *cred,
2112 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2113 struct nfs4_state *state, fmode_t fmode,
2114 int openflags)
6168f62c
WAA		 2115{
2116 struct nfs_access_entry cache;
2117 u32 mask;
2118
2119 /* access call failed or for some reason the server doesn't
2120 * support any access modes -- defer access call until later */
2121 if (opendata->o_res.access_supported == 0)
2122 return 0;
2123
2124 mask = 0;
f3792d63
TM		 2125 /*
2126 * Use openflags to check for exec, because fmode won't
2127 * always have FMODE_EXEC set when file open for exec.
2128 */
f8d9a897
WAA		 2129 if (openflags & __FMODE_EXEC) {
2130 /* ONLY check for exec rights */
2131 mask = MAY_EXEC;
f3792d63 2132 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2133 mask = MAY_READ;
6168f62c
WAA		 2134
2135 cache.cred = cred;
2136 cache.jiffies = jiffies;
2137 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2138 nfs_access_add_cache(state->inode, &cache);
2139
bbd3a8ee 2140 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2141 return 0;
2142
2143 /* even though OPEN succeeded, access is denied. Close the file */
2144 nfs4_close_state(state, fmode);
998f40b5 2145 return -EACCES;
6168f62c
WAA		 2146}
2147
b257957e
AB		 2148/*
2149 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2150 */
2151static int _nfs4_proc_open(struct nfs4_opendata *data)
2152{
2b0143b5 2153 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2154 struct nfs_server *server = NFS_SERVER(dir);
2155 struct nfs_openargs *o_arg = &data->o_arg;
2156 struct nfs_openres *o_res = &data->o_res;
2157 int status;
2158
2159 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2160 if (!data->rpc_done)
2161 return status;
2162 if (status != 0) {
2163 if (status == -NFS4ERR_BADNAME &&
2164 !(o_arg->open_flags & O_CREAT))
2165 return -ENOENT;
24ac23ab 2166 return status;
08ef7bd3 2167 }
24ac23ab 2168
6926afd1
TM		 2169 nfs_fattr_map_and_free_names(server, &data->f_attr);
2170
5bc2afc2 2171 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2172 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2173 if (o_arg->open_flags & O_EXCL)
2174 data->file_created = 1;
2175 else if (o_res->cinfo.before != o_res->cinfo.after)
2176 data->file_created = 1;
2177 }
0df5dd4a
TM		 2178 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2179 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2180 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2181 status = _nfs4_proc_open_confirm(data);
1da177e4 2182 if (status != 0)
24ac23ab 2183 return status;
1da177e4
LT		 2184 }
2185 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2186 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2187 return 0;
1da177e4
LT		 2188}
2189
d83217c1
AA		 2190static int nfs4_recover_expired_lease(struct nfs_server *server)
2191{
2192 return nfs4_client_recover_expired_lease(server->nfs_client);
2193}
2194
1da177e4
LT		 2195/*
2196 * OPEN_EXPIRED:
2197 * reclaim state on the server after a network partition.
2198 * Assumes caller holds the appropriate lock
2199 */
539cd03a 2200static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2201{
e56e0b78 2202 struct nfs4_opendata *opendata;
864472e9 2203 int ret;
1da177e4 2204
4a1c0893 2205 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2206 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2207 if (IS_ERR(opendata))
2208 return PTR_ERR(opendata);
864472e9 2209 ret = nfs4_open_recover(opendata, state);
35d05778 2210 if (ret == -ESTALE)
3d4ff43d 2211 d_drop(ctx->dentry);
c6d00e63 2212 nfs4_opendata_put(opendata);
864472e9 2213 return ret;
1da177e4
LT		 2214}
2215
a9ed2e25 2216static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2217{
539cd03a 2218 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2219 struct nfs4_exception exception = { };
2220 int err;
2221
2222 do {
539cd03a 2223 err = _nfs4_open_expired(ctx, state);
42113a75 2224 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2225 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2226 continue;
a9ed2e25
TM		 2227 switch (err) {
2228 default:
2229 goto out;
2230 case -NFS4ERR_GRACE:
2231 case -NFS4ERR_DELAY:
2232 nfs4_handle_exception(server, err, &exception);
2233 err = 0;
2234 }
202b50dc 2235 } while (exception.retry);
a9ed2e25 2236out:
202b50dc
TM		 2237 return err;
2238}
2239
1da177e4
LT		 2240static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2241{
1da177e4 2242 struct nfs_open_context *ctx;
864472e9 2243 int ret;
1da177e4 2244
864472e9
TM		 2245 ctx = nfs4_state_find_open_context(state);
2246 if (IS_ERR(ctx))
91876b13 2247 return -EAGAIN;
539cd03a 2248 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2249 put_nfs_open_context(ctx);
2250 return ret;
1da177e4
LT		 2251}
2252
4dfd4f7a
TM		 2253static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2254{
2255 nfs_remove_bad_delegation(state->inode);
2256 write_seqlock(&state->seqlock);
2257 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2258 write_sequnlock(&state->seqlock);
2259 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2260}
2261
2262static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2263{
2264 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2265 nfs_finish_clear_delegation_stateid(state);
2266}
2267
2268static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2269{
2270 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2271 nfs40_clear_delegation_stateid(state);
2272 return nfs4_open_expired(sp, state);
2273}
2274
f062eb6c 2275#if defined(CONFIG_NFS_V4_1)
0c116cad 2276static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2277{
f062eb6c 2278 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2279 nfs4_stateid stateid;
ab7cb0df 2280 struct nfs_delegation *delegation;
0c116cad
TM		 2281 struct rpc_cred *cred;
2282 int status;
3e60ffdd 2283
ab7cb0df
TM		 2284 /* Get the delegation credential for use by test/free_stateid */
2285 rcu_read_lock();
2286 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2287 if (delegation == NULL) {
ab7cb0df 2288 rcu_read_unlock();
0c116cad
TM		 2289 return;
2290 }
2291
2292 nfs4_stateid_copy(&stateid, &delegation->stateid);
2293 cred = get_rpccred(delegation->cred);
2294 rcu_read_unlock();
2295 status = nfs41_test_stateid(server, &stateid, cred);
2296 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2297
3e60ffdd
CL		 2298 if (status != NFS_OK) {
2299 /* Free the stateid unless the server explicitly
2300 * informs us the stateid is unrecognized. */
2301 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2302 nfs41_free_stateid(server, &stateid, cred);
2303 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2304 }
ab7cb0df 2305
0c116cad 2306 put_rpccred(cred);
3e60ffdd
CL		 2307}
2308
2309/**
2310 * nfs41_check_open_stateid - possibly free an open stateid
2311 *
2312 * @state: NFSv4 state for an inode
2313 *
2314 * Returns NFS_OK if recovery for this stateid is now finished.
2315 * Otherwise a negative NFS4ERR value is returned.
2316 */
2317static int nfs41_check_open_stateid(struct nfs4_state *state)
2318{
2319 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2320 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2321 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2322 int status;
2323
2324 /* If a state reset has been done, test_stateid is unneeded */
2325 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2326 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2327 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2328 return -NFS4ERR_BAD_STATEID;
2329
ab7cb0df 2330 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2331 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2332 if (status != NFS_OK) {
2333 /* Free the stateid unless the server explicitly
2334 * informs us the stateid is unrecognized. */
2335 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2336 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2337
2338 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2339 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2340 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2341 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2342 }
2343 return status;
2344}
2345
2346static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2347{
eb64cf96 2348 int status;
b01dd1d8 2349
0c116cad 2350 nfs41_check_delegation_stateid(state);
3e60ffdd 2351 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2352 if (status != NFS_OK)
2353 status = nfs4_open_expired(sp, state);
2354 return status;
f062eb6c
BS		 2355}
2356#endif
2357
aa53ed54
JL		 2358/*
2359 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2360 * fields corresponding to attributes that were used to store the verifier.
2361 * Make sure we clobber those fields in the later setattr call
2362 */
5334c5bd
KM		 2363static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2364 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2365{
5334c5bd
KM		 2366 const u32 *attrset = opendata->o_res.attrset;
2367
2368 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2369 !(sattr->ia_valid & ATTR_ATIME_SET))
2370 sattr->ia_valid |= ATTR_ATIME;
2371
5334c5bd 2372 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2373 !(sattr->ia_valid & ATTR_MTIME_SET))
2374 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2375
2376 /* Except MODE, it seems harmless of setting twice. */
2377 if ((attrset[1] & FATTR4_WORD1_MODE))
2378 sattr->ia_valid &= ~ATTR_MODE;
2379
2380 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2381 *label = NULL;
aa53ed54
JL		 2382}
2383
c21443c2
TM		 2384static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2385 fmode_t fmode,
2386 int flags,
3efb9722 2387 struct nfs_open_context *ctx)
c21443c2
TM		 2388{
2389 struct nfs4_state_owner *sp = opendata->owner;
2390 struct nfs_server *server = sp->so_server;
275bb307 2391 struct dentry *dentry;
c21443c2
TM		 2392 struct nfs4_state *state;
2393 unsigned int seq;
2394 int ret;
2395
2396 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2397
2398 ret = _nfs4_proc_open(opendata);
dca78001 2399 if (ret != 0)
c21443c2
TM		 2400 goto out;
2401
2402 state = nfs4_opendata_to_nfs4_state(opendata);
2403 ret = PTR_ERR(state);
2404 if (IS_ERR(state))
2405 goto out;
2406 if (server->caps & NFS_CAP_POSIX_LOCK)
2407 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2408
275bb307 2409 dentry = opendata->dentry;
2b0143b5 2410 if (d_really_is_negative(dentry)) {
275bb307
TM		 2411 /* FIXME: Is this d_drop() ever needed? */
2412 d_drop(dentry);
2413 dentry = d_add_unique(dentry, igrab(state->inode));
2414 if (dentry == NULL) {
2415 dentry = opendata->dentry;
2416 } else if (dentry != ctx->dentry) {
2417 dput(ctx->dentry);
2418 ctx->dentry = dget(dentry);
2419 }
2420 nfs_set_verifier(dentry,
2b0143b5 2421 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2422 }
2423
c21443c2
TM		 2424 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2425 if (ret != 0)
2426 goto out;
2427
3efb9722 2428 ctx->state = state;
2b0143b5 2429 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2430 nfs_inode_attach_open_context(ctx);
2431 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2432 nfs4_schedule_stateid_recovery(server, state);
2433 }
c21443c2
TM		 2434out:
2435 return ret;
2436}
2437
1da177e4 2438/*
24ac23ab 2439 * Returns a referenced nfs4_state
1da177e4 2440 */
82be417a 2441static int _nfs4_do_open(struct inode *dir,
4197a055 2442 struct nfs_open_context *ctx,
82be417a
AA		 2443 int flags,
2444 struct iattr *sattr,
5bc2afc2
TM		 2445 struct nfs4_label *label,
2446 int *opened)
1da177e4
LT		 2447{
2448 struct nfs4_state_owner *sp;
2449 struct nfs4_state *state = NULL;
2450 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2451 struct nfs4_opendata *opendata;
4197a055
TM		 2452 struct dentry *dentry = ctx->dentry;
2453 struct rpc_cred *cred = ctx->cred;
2454 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2455 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2456 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2457 struct nfs4_label *olabel = NULL;
aac00a8d 2458 int status;
1da177e4
LT		 2459
2460 /* Protect against reboot recovery conflicts */
1da177e4 2461 status = -ENOMEM;
d1e284d5
TM		 2462 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2463 if (sp == NULL) {
1da177e4
LT		 2464 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2465 goto out_err;
2466 }
58d9714a
TM		 2467 status = nfs4_recover_expired_lease(server);
2468 if (status != 0)
b4454fe1 2469 goto err_put_state_owner;
2b0143b5
DH		 2470 if (d_really_is_positive(dentry))
2471 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2472 status = -ENOMEM;
2b0143b5 2473 if (d_really_is_positive(dentry))
49f9a0fa 2474 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2475 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2476 label, claim, GFP_KERNEL);
e56e0b78 2477 if (opendata == NULL)
95d35cb4 2478 goto err_put_state_owner;
1da177e4 2479
14c43f76
DQ		 2480 if (label) {
2481 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2482 if (IS_ERR(olabel)) {
2483 status = PTR_ERR(olabel);
2484 goto err_opendata_put;
2485 }
2486 }
2487
e911b815
TM		 2488 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2489 if (!opendata->f_attr.mdsthreshold) {
2490 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2491 if (!opendata->f_attr.mdsthreshold)
2492 goto err_free_label;
2493 }
1549210f 2494 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2495 }
2b0143b5
DH		 2496 if (d_really_is_positive(dentry))
2497 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2498
3efb9722 2499 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2500 if (status != 0)
14c43f76 2501 goto err_free_label;
3efb9722 2502 state = ctx->state;
6168f62c 2503
efcbc04e 2504 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2505 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2506 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2507
2508 nfs_fattr_init(opendata->o_res.f_attr);
2509 status = nfs4_do_setattr(state->inode, cred,
2510 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2511 state, label, olabel);
2512 if (status == 0) {
f044636d
TM		 2513 nfs_setattr_update_inode(state->inode, sattr,
2514 opendata->o_res.f_attr);
aa9c2669 2515 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2516 }
0ab64e0e 2517 }
c5c3fb5f 2518 if (opened && opendata->file_created)
5bc2afc2 2519 *opened |= FILE_CREATED;
82be417a 2520
e911b815 2521 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2522 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2523 opendata->f_attr.mdsthreshold = NULL;
2524 }
82be417a 2525
14c43f76
DQ		 2526 nfs4_label_free(olabel);
2527
c6d00e63 2528 nfs4_opendata_put(opendata);
1da177e4 2529 nfs4_put_state_owner(sp);
1da177e4 2530 return 0;
14c43f76
DQ		 2531err_free_label:
2532 nfs4_label_free(olabel);
c6d00e63
TM		 2533err_opendata_put:
2534 nfs4_opendata_put(opendata);
e56e0b78
TM		 2535err_put_state_owner:
2536 nfs4_put_state_owner(sp);
1da177e4 2537out_err:
1da177e4
LT		 2538 return status;
2539}
2540
2541
82be417a 2542static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2543 struct nfs_open_context *ctx,
82be417a
AA		 2544 int flags,
2545 struct iattr *sattr,
5bc2afc2
TM		 2546 struct nfs4_label *label,
2547 int *opened)
1da177e4 2548{
49f9a0fa 2549 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2550 struct nfs4_exception exception = { };
2551 struct nfs4_state *res;
2552 int status;
2553
2554 do {
5bc2afc2 2555 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2556 res = ctx->state;
42113a75 2557 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2558 if (status == 0)
2559 break;
2560 /* NOTE: BAD_SEQID means the server and client disagree about the
2561 * book-keeping w.r.t. state-changing operations
2562 * (OPEN/CLOSE/LOCK/LOCKU...)
2563 * It is actually a sign of a bug on the client or on the server.
2564 *
2565 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2566 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2567 * have unhashed the old state_owner for us, and that we can
2568 * therefore safely retry using a new one. We should still warn
2569 * the user though...
2570 */
2571 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2572 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2573 " returned a bad sequence-id error!\n",
2574 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2575 exception.retry = 1;
2576 continue;
2577 }
550f5747
TM		 2578 /*
2579 * BAD_STATEID on OPEN means that the server cancelled our
2580 * state before it received the OPEN_CONFIRM.
2581 * Recover by retrying the request as per the discussion
2582 * on Page 181 of RFC3530.
2583 */
2584 if (status == -NFS4ERR_BAD_STATEID) {
2585 exception.retry = 1;
2586 continue;
2587 }
aac00a8d
TM		 2588 if (status == -EAGAIN) {
2589 /* We must have found a delegation */
2590 exception.retry = 1;
2591 continue;
2592 }
49f9a0fa
TM		 2593 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2594 continue;
2595 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2596 status, &exception));
2597 } while (exception.retry);
2598 return res;
2599}
2600
659bfcd6
TM		 2601static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2602 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2603 struct nfs4_state *state, struct nfs4_label *ilabel,
2604 struct nfs4_label *olabel)
1da177e4 2605{
3e4f6290 2606 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2607 struct nfs_setattrargs arg = {
3e4f6290 2608 .fh = NFS_FH(inode),
1da177e4
LT		 2609 .iap = sattr,
2610 .server = server,
2611 .bitmask = server->attr_bitmask,
1775fd3e 2612 .label = ilabel,
1da177e4
LT		 2613 };
2614 struct nfs_setattrres res = {
2615 .fattr = fattr,
1775fd3e 2616 .label = olabel,
1da177e4
LT		 2617 .server = server,
2618 };
2619 struct rpc_message msg = {
659bfcd6
TM		 2620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2621 .rpc_argp = &arg,
2622 .rpc_resp = &res,
2623 .rpc_cred = cred,
1da177e4 2624 };
26e976a8 2625 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2626 fmode_t fmode;
2627 bool truncate;
65e4308d 2628 int status;
1da177e4 2629
aa9c2669
DQ		 2630 arg.bitmask = nfs4_bitmask(server, ilabel);
2631 if (ilabel)
2632 arg.bitmask = nfs4_bitmask(server, olabel);
2633
0e574af1 2634 nfs_fattr_init(fattr);
1da177e4 2635
ee3ae84e
TM		 2636 /* Servers should only apply open mode checks for file size changes */
2637 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2638 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2639
2640 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2641 /* Use that stateid */
0418dae1 2642 } else if (truncate && state != NULL) {
2a369153
TM		 2643 struct nfs_lockowner lockowner = {
2644 .l_owner = current->files,
2645 .l_pid = current->tgid,
2646 };
0418dae1
TM		 2647 if (!nfs4_valid_open_stateid(state))
2648 return -EBADF;
2649 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2650 &lockowner) == -EIO)
2651 return -EBADF;
08e9eac4 2652 } else
f597c537 2653 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2654
7c513058 2655 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2656 if (status == 0 && state != NULL)
2657 renew_lease(server, timestamp);
65e4308d 2658 return status;
1da177e4
LT		 2659}
2660
659bfcd6
TM		 2661static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2662 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2663 struct nfs4_state *state, struct nfs4_label *ilabel,
2664 struct nfs4_label *olabel)
1da177e4 2665{
3e4f6290 2666 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2667 struct nfs4_exception exception = {
2668 .state = state,
3114ea7a 2669 .inode = inode,
a1d0b5ee 2670 };
1da177e4
LT		 2671 int err;
2672 do {
1775fd3e 2673 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2674 trace_nfs4_setattr(inode, err);
451146be
TM		 2675 switch (err) {
2676 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2677 if (!(sattr->ia_valid & ATTR_SIZE)) {
2678 pr_warn_once("NFSv4: server %s is incorrectly "
2679 "applying open mode checks to "
2680 "a SETATTR that is not "
2681 "changing file size.\n",
2682 server->nfs_client->cl_hostname);
2683 }
451146be
TM		 2684 if (state && !(state->state & FMODE_WRITE)) {
2685 err = -EBADF;
2686 if (sattr->ia_valid & ATTR_OPEN)
2687 err = -EACCES;
2688 goto out;
2689 }
2690 }
2691 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2692 } while (exception.retry);
451146be 2693out:
1da177e4
LT		 2694 return err;
2695}
2696
500d701f
PT		 2697static bool
2698nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2699{
2700 if (inode == NULL || !nfs_have_layout(inode))
2701 return false;
2702
2703 return pnfs_wait_on_layoutreturn(inode, task);
2704}
2705
1da177e4
LT		 2706struct nfs4_closedata {
2707 struct inode *inode;
2708 struct nfs4_state *state;
2709 struct nfs_closeargs arg;
2710 struct nfs_closeres res;
516a6af6 2711 struct nfs_fattr fattr;
26e976a8 2712 unsigned long timestamp;
f7e8917a
FI		 2713 bool roc;
2714 u32 roc_barrier;
1da177e4
LT		 2715};
2716
963d8fe5 2717static void nfs4_free_closedata(void *data)
9512135d 2718{
963d8fe5
TM		 2719 struct nfs4_closedata *calldata = data;
2720 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2721 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2722
f7e8917a
FI		 2723 if (calldata->roc)
2724 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2725 nfs4_put_open_state(calldata->state);
2726 nfs_free_seqid(calldata->arg.seqid);
9512135d 2727 nfs4_put_state_owner(sp);
322b2b90 2728 nfs_sb_deactive(sb);
9512135d
TM		 2729 kfree(calldata);
2730}
2731
963d8fe5 2732static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2733{
963d8fe5 2734 struct nfs4_closedata *calldata = data;
1da177e4 2735 struct nfs4_state *state = calldata->state;
1da177e4 2736 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2737 nfs4_stateid *res_stateid = NULL;
1da177e4 2738
a3ca5651 2739 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2740 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2741 return;
42113a75 2742 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2743 /* hmm. we are done with the inode, and in the process of freeing
2744 * the state_owner. we keep this around to process errors
2745 */
1da177e4
LT		 2746 switch (task->tk_status) {
2747 case 0:
412f6c4c 2748 res_stateid = &calldata->res.stateid;
3c13cb5b 2749 if (calldata->roc)
f7e8917a
FI		 2750 pnfs_roc_set_barrier(state->inode,
2751 calldata->roc_barrier);
26e976a8 2752 renew_lease(server, calldata->timestamp);
412f6c4c 2753 break;
69794ad7 2754 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2755 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2756 case -NFS4ERR_OLD_STATEID:
2757 case -NFS4ERR_BAD_STATEID:
1da177e4 2758 case -NFS4ERR_EXPIRED:
566fcec6 2759 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2760 &state->open_stateid)) {
566fcec6
TM		 2761 rpc_restart_call_prepare(task);
2762 goto out_release;
2763 }
dc0b027d 2764 if (calldata->arg.fmode == 0)
9e33bed5 2765 break;
1da177e4 2766 default:
8478eaa1 2767 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2768 rpc_restart_call_prepare(task);
69794ad7
TM		 2769 goto out_release;
2770 }
1da177e4 2771 }
4a1e2feb
TM		 2772 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2773 res_stateid, calldata->arg.fmode);
69794ad7 2774out_release:
72211dbe 2775 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2776 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2777 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2778}
2779
4ce70ada 2780static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2781{
4ce70ada 2782 struct nfs4_closedata *calldata = data;
9512135d 2783 struct nfs4_state *state = calldata->state;
7fdab069 2784 struct inode *inode = calldata->inode;
aee7af35 2785 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2786 int call_close = 0;
9512135d 2787
a3ca5651 2788 dprintk("%s: begin!\n", __func__);
963d8fe5 2789 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2790 goto out_wait;
003707c7 2791
88069f77 2792 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2793 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2794 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2795 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2796 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2797 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2798 /* Calculate the change in open mode */
cd9288ff 2799 calldata->arg.fmode = 0;
e7616923 2800 if (state->n_rdwr == 0) {
cd9288ff
TM		 2801 if (state->n_rdonly == 0)
2802 call_close |= is_rdonly;
2803 else if (is_rdonly)
2804 calldata->arg.fmode |= FMODE_READ;
2805 if (state->n_wronly == 0)
2806 call_close |= is_wronly;
2807 else if (is_wronly)
2808 calldata->arg.fmode |= FMODE_WRITE;
2809 } else if (is_rdwr)
2810 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2811
2812 if (calldata->arg.fmode == 0)
2813 call_close |= is_rdwr;
2814
5d422301
TM		 2815 if (!nfs4_valid_open_stateid(state))
2816 call_close = 0;
4cecb76f 2817 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2818
2819 if (!call_close) {
963d8fe5 2820 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2821 goto out_no_action;
9512135d 2822 }
88069f77 2823
500d701f
PT		 2824 if (nfs4_wait_on_layoutreturn(inode, task)) {
2825 nfs_release_seqid(calldata->arg.seqid);
2826 goto out_wait;
2827 }
2828
3c13cb5b 2829 if (calldata->arg.fmode == 0)
88069f77 2830 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2831 if (calldata->roc)
2832 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2833
6ae37339
TM		 2834 calldata->arg.share_access =
2835 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2836 calldata->arg.fmode, 0);
88069f77 2837
516a6af6 2838 nfs_fattr_init(calldata->res.fattr);
26e976a8 2839 calldata->timestamp = jiffies;
7fdab069 2840 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2841 &calldata->arg.seq_args,
2842 &calldata->res.seq_res,
2240a9e2
TM		 2843 task) != 0)
2844 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2845 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2846 return;
2847out_no_action:
2848 task->tk_action = NULL;
2849out_wait:
2850 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2851}
2852
963d8fe5 2853static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2854 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2855 .rpc_call_done = nfs4_close_done,
2856 .rpc_release = nfs4_free_closedata,
2857};
2858
fe08c546
PT		 2859static bool nfs4_roc(struct inode *inode)
2860{
40dd4b7a 2861 if (!nfs_have_layout(inode))
fe08c546 2862 return false;
fe08c546
PT		 2863 return pnfs_roc(inode);
2864}
2865
1da177e4
LT		 2866/*
2867 * It is possible for data to be read/written from a mem-mapped file
2868 * after the sys_close call (which hits the vfs layer as a flush).
2869 * This means that we can't safely call nfsv4 close on a file until
2870 * the inode is cleared. This in turn means that we are not good
2871 * NFSv4 citizens - we do not indicate to the server to update the file's
2872 * share state even when we are done with one of the three share
2873 * stateid's in the inode.
2874 *
2875 * NOTE: Caller must be holding the sp->so_owner semaphore!
2876 */
1f7977c1 2877int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2878{
4a35bd41 2879 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2880 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2881 struct nfs4_closedata *calldata;
b39e625b
TM		 2882 struct nfs4_state_owner *sp = state->owner;
2883 struct rpc_task *task;
5138fde0
TM		 2884 struct rpc_message msg = {
2885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2886 .rpc_cred = state->owner->so_cred,
2887 };
c970aa85
TM		 2888 struct rpc_task_setup task_setup_data = {
2889 .rpc_client = server->client,
5138fde0 2890 .rpc_message = &msg,
c970aa85 2891 .callback_ops = &nfs4_close_ops,
101070ca 2892 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2893 .flags = RPC_TASK_ASYNC,
2894 };
9512135d 2895 int status = -ENOMEM;
1da177e4 2896
fa940720
WAA		 2897 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2898 &task_setup_data.rpc_client, &msg);
2899
8535b2be 2900 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2901 if (calldata == NULL)
9512135d 2902 goto out;
a9c92d6b 2903 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2904 calldata->inode = state->inode;
1da177e4 2905 calldata->state = state;
4a35bd41 2906 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2907 /* Serialization for the sequence id */
63f5f796
TM		 2908 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2909 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2910 if (IS_ERR(calldata->arg.seqid))
9512135d 2911 goto out_free_calldata;
dc0b027d 2912 calldata->arg.fmode = 0;
a65318bf 2913 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2914 calldata->res.fattr = &calldata->fattr;
c1d51931 2915 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2916 calldata->res.server = server;
fe08c546 2917 calldata->roc = nfs4_roc(state->inode);
643168c2 2918 nfs_sb_active(calldata->inode->i_sb);
9512135d 2919
1174dd1f
TM		 2920 msg.rpc_argp = &calldata->arg;
2921 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2922 task_setup_data.callback_data = calldata;
2923 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2924 if (IS_ERR(task))
2925 return PTR_ERR(task);
a49c3c77
TM		 2926 status = 0;
2927 if (wait)
2928 status = rpc_wait_for_completion_task(task);
b39e625b 2929 rpc_put_task(task);
a49c3c77 2930 return status;
9512135d
TM		 2931out_free_calldata:
2932 kfree(calldata);
2933out:
b39e625b
TM		 2934 nfs4_put_open_state(state);
2935 nfs4_put_state_owner(sp);
9512135d 2936 return status;
1da177e4
LT		 2937}
2938
2b484297 2939static struct inode *
5bc2afc2
TM		 2940nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2941 int open_flags, struct iattr *attr, int *opened)
1da177e4 2942{
1da177e4 2943 struct nfs4_state *state;
aa9c2669
DQ		 2944 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2945
2946 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2947
565277f6 2948 /* Protect against concurrent sillydeletes */
5bc2afc2 2949 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2950
2951 nfs4_label_release_security(label);
2952
f46e0bd3
TM		 2953 if (IS_ERR(state))
2954 return ERR_CAST(state);
275bb307 2955 return state->inode;
1da177e4
LT		 2956}
2957
1185a552 2958static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2959{
2960 if (ctx->state == NULL)
2961 return;
2962 if (is_sync)
643168c2 2963 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2964 else
643168c2 2965 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2966}
1da177e4 2967
b944dba3
TM		 2968#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2969#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2970#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2971
1da177e4
LT		 2972static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2973{
8c61282f 2974 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2975 struct nfs4_server_caps_arg args = {
2976 .fhandle = fhandle,
8c61282f 2977 .bitmask = bitmask,
43652ad5 2978 };
1da177e4
LT		 2979 struct nfs4_server_caps_res res = {};
2980 struct rpc_message msg = {
2981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2982 .rpc_argp = &args,
1da177e4
LT		 2983 .rpc_resp = &res,
2984 };
2985 int status;
2986
8c61282f
KM		 2987 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2988 FATTR4_WORD0_FH_EXPIRE_TYPE |
2989 FATTR4_WORD0_LINK_SUPPORT |
2990 FATTR4_WORD0_SYMLINK_SUPPORT |
2991 FATTR4_WORD0_ACLSUPPORT;
2992 if (minorversion)
2993 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2994
7c513058 2995 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2996 if (status == 0) {
b944dba3 2997 /* Sanity check the server answers */
8c61282f 2998 switch (minorversion) {
b944dba3
TM		 2999 case 0:
3000 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3001 res.attr_bitmask[2] = 0;
3002 break;
3003 case 1:
3004 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3005 break;
3006 case 2:
3007 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3008 }
1da177e4 3009 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3010 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3011 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3012 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3013 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3014 NFS_CAP_CTIME|NFS_CAP_MTIME|
3015 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3016 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3017 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3018 server->caps |= NFS_CAP_ACLS;
3019 if (res.has_links != 0)
3020 server->caps |= NFS_CAP_HARDLINKS;
3021 if (res.has_symlinks != 0)
3022 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3023 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3024 server->caps |= NFS_CAP_FILEID;
3025 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3026 server->caps |= NFS_CAP_MODE;
3027 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3028 server->caps |= NFS_CAP_NLINK;
3029 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3030 server->caps |= NFS_CAP_OWNER;
3031 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3032 server->caps |= NFS_CAP_OWNER_GROUP;
3033 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3034 server->caps |= NFS_CAP_ATIME;
3035 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3036 server->caps |= NFS_CAP_CTIME;
3037 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3038 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3039#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3040 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3041 server->caps |= NFS_CAP_SECURITY_LABEL;
3042#endif
3043 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3044 sizeof(server->attr_bitmask));
b944dba3 3045 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3046
a65318bf
TM		 3047 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3048 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3049 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3050 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3051 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3052 sizeof(server->exclcreat_bitmask));
1da177e4 3053 server->acl_bitmask = res.acl_bitmask;
264e6351 3054 server->fh_expire_type = res.fh_expire_type;
1da177e4 3055 }
cccef3b9 3056
1da177e4
LT		 3057 return status;
3058}
3059
55a97593 3060int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3061{
3062 struct nfs4_exception exception = { };
3063 int err;
3064 do {
3065 err = nfs4_handle_exception(server,
3066 _nfs4_server_capabilities(server, fhandle),
3067 &exception);
3068 } while (exception.retry);
3069 return err;
3070}
3071
3072static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3073 struct nfs_fsinfo *info)
3074{
aa9c2669 3075 u32 bitmask[3];
1da177e4 3076 struct nfs4_lookup_root_arg args = {
aa9c2669 3077 .bitmask = bitmask,
1da177e4
LT		 3078 };
3079 struct nfs4_lookup_res res = {
3080 .server = server,
0e574af1 3081 .fattr = info->fattr,
1da177e4
LT		 3082 .fh = fhandle,
3083 };
3084 struct rpc_message msg = {
3085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3086 .rpc_argp = &args,
3087 .rpc_resp = &res,
3088 };
008f55d0 3089
aa9c2669
DQ		 3090 bitmask[0] = nfs4_fattr_bitmap[0];
3091 bitmask[1] = nfs4_fattr_bitmap[1];
3092 /*
3093 * Process the label in the upcoming getfattr
3094 */
3095 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3096
0e574af1 3097 nfs_fattr_init(info->fattr);
7c513058 3098 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3099}
3100
3101static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3102 struct nfs_fsinfo *info)
3103{
3104 struct nfs4_exception exception = { };
3105 int err;
3106 do {
fb8a5ba8 3107 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3108 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3109 switch (err) {
3110 case 0:
3111 case -NFS4ERR_WRONGSEC:
05e9cfb4 3112 goto out;
fb8a5ba8
BS		 3113 default:
3114 err = nfs4_handle_exception(server, err, &exception);
3115 }
1da177e4 3116 } while (exception.retry);
05e9cfb4 3117out:
1da177e4
LT		 3118 return err;
3119}
3120
8f70e95f
BS		 3121static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3122 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3123{
c2190661
TM		 3124 struct rpc_auth_create_args auth_args = {
3125 .pseudoflavor = flavor,
3126 };
8f70e95f
BS		 3127 struct rpc_auth *auth;
3128 int ret;
3129
c2190661 3130 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3131 if (IS_ERR(auth)) {
75bc8821 3132 ret = -EACCES;
8f70e95f
BS		 3133 goto out;
3134 }
3135 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3136out:
3137 return ret;
3138}
3139
9a744ba3
CL		 3140/*
3141 * Retry pseudoroot lookup with various security flavors. We do this when:
3142 *
3143 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3144 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3145 *
3146 * Returns zero on success, or a negative NFS4ERR value, or a
3147 * negative errno value.
3148 */
801a16dc 3149static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3150 struct nfs_fsinfo *info)
1da177e4 3151{
9a744ba3
CL		 3152 /* Per 3530bis 15.33.5 */
3153 static const rpc_authflavor_t flav_array[] = {
3154 RPC_AUTH_GSS_KRB5P,
3155 RPC_AUTH_GSS_KRB5I,
3156 RPC_AUTH_GSS_KRB5,
c4eafe11 3157 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3158 RPC_AUTH_NULL,
3159 };
3160 int status = -EPERM;
3161 size_t i;
6a1a1e34 3162
4d4b69dd
WAA		 3163 if (server->auth_info.flavor_len > 0) {
3164 /* try each flavor specified by user */
3165 for (i = 0; i < server->auth_info.flavor_len; i++) {
3166 status = nfs4_lookup_root_sec(server, fhandle, info,
3167 server->auth_info.flavors[i]);
3168 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3169 continue;
3170 break;
3171 }
3172 } else {
3173 /* no flavors specified by user, try default list */
3174 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3175 status = nfs4_lookup_root_sec(server, fhandle, info,
3176 flav_array[i]);
3177 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3178 continue;
3179 break;
3180 }
8f70e95f 3181 }
9a744ba3 3182
fb8a5ba8
BS		 3183 /*
3184 * -EACCESS could mean that the user doesn't have correct permissions
3185 * to access the mount. It could also mean that we tried to mount
3186 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3187 * existing mount programs don't handle -EACCES very well so it should
3188 * be mapped to -EPERM instead.
3189 */
3190 if (status == -EACCES)
3191 status = -EPERM;
801a16dc
BS		 3192 return status;
3193}
3194
2ed4b95b
CL		 3195static int nfs4_do_find_root_sec(struct nfs_server *server,
3196 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3197{
3198 int mv = server->nfs_client->cl_minorversion;
3199 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3200}
3201
3202/**
3203 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3204 * @server: initialized nfs_server handle
3205 * @fhandle: we fill in the pseudo-fs root file handle
3206 * @info: we fill in an FSINFO struct
5e6b1990 3207 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3208 *
3209 * Returns zero on success, or a negative errno.
801a16dc 3210 */
3028eb2b 3211int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3212 struct nfs_fsinfo *info,
3213 bool auth_probe)
801a16dc 3214{
c7757074 3215 int status = 0;
2ed4b95b 3216
c7757074 3217 if (!auth_probe)
5e6b1990 3218 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3219
3220 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3221 status = nfs4_do_find_root_sec(server, fhandle, info);
3222
1da177e4
LT		 3223 if (status == 0)
3224 status = nfs4_server_capabilities(server, fhandle);
3225 if (status == 0)
3226 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3227
c12e87f4 3228 return nfs4_map_errors(status);
1da177e4
LT		 3229}
3230
bae36241
BS		 3231static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3232 struct nfs_fsinfo *info)
3233{
3234 int error;
3235 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3236 struct nfs4_label *label = NULL;
bae36241
BS		 3237
3238 error = nfs4_server_capabilities(server, mntfh);
3239 if (error < 0) {
3240 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3241 return error;
3242 }
3243
14c43f76
DQ		 3244 label = nfs4_label_alloc(server, GFP_KERNEL);
3245 if (IS_ERR(label))
3246 return PTR_ERR(label);
3247
1775fd3e 3248 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3249 if (error < 0) {
3250 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3251 goto err_free_label;
bae36241
BS		 3252 }
3253
3254 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3255 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3256 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3257
14c43f76
DQ		 3258err_free_label:
3259 nfs4_label_free(label);
3260
bae36241
BS		 3261 return error;
3262}
3263
6b97fd3d
MN		 3264/*
3265 * Get locations and (maybe) other attributes of a referral.
3266 * Note that we'll actually follow the referral later when
3267 * we detect fsid mismatch in inode revalidation
3268 */
f05d147f
BS		 3269static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3270 const struct qstr *name, struct nfs_fattr *fattr,
3271 struct nfs_fh *fhandle)
6b97fd3d
MN		 3272{
3273 int status = -ENOMEM;
3274 struct page *page = NULL;
3275 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3276
3277 page = alloc_page(GFP_KERNEL);
3278 if (page == NULL)
3279 goto out;
3280 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3281 if (locations == NULL)
3282 goto out;
3283
f05d147f 3284 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3285 if (status != 0)
3286 goto out;
519ae255
CL		 3287
3288 /*
3289 * If the fsid didn't change, this is a migration event, not a
3290 * referral. Cause us to drop into the exception handler, which
3291 * will kick off migration recovery.
3292 */
6b97fd3d 3293 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3294 dprintk("%s: server did not return a different fsid for"
3295 " a referral at %s\n", __func__, name->name);
519ae255 3296 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3297 goto out;
3298 }
533eb461
AA		 3299 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3300 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3301
533eb461 3302 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3303 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3304 memset(fhandle, 0, sizeof(struct nfs_fh));
3305out:
3306 if (page)
3307 __free_page(page);
5d7ca35a 3308 kfree(locations);
6b97fd3d
MN		 3309 return status;
3310}
3311
1775fd3e
DQ		 3312static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3313 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3314{
3315 struct nfs4_getattr_arg args = {
3316 .fh = fhandle,
3317 .bitmask = server->attr_bitmask,
3318 };
3319 struct nfs4_getattr_res res = {
3320 .fattr = fattr,
1775fd3e 3321 .label = label,
1da177e4
LT		 3322 .server = server,
3323 };
3324 struct rpc_message msg = {
3325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3326 .rpc_argp = &args,
3327 .rpc_resp = &res,
3328 };
aa9c2669
DQ		 3329
3330 args.bitmask = nfs4_bitmask(server, label);
3331
0e574af1 3332 nfs_fattr_init(fattr);
7c513058 3333 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3334}
3335
1775fd3e
DQ		 3336static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3337 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3338{
3339 struct nfs4_exception exception = { };
3340 int err;
3341 do {
b5f875a9
TM		 3342 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3343 trace_nfs4_getattr(server, fhandle, fattr, err);
3344 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3345 &exception);
3346 } while (exception.retry);
3347 return err;
3348}
3349
3350/*
3351 * The file is not closed if it is opened due to the a request to change
3352 * the size of the file. The open call will not be needed once the
3353 * VFS layer lookup-intents are implemented.
3354 *
3355 * Close is called when the inode is destroyed.
3356 * If we haven't opened the file for O_WRONLY, we
3357 * need to in the size_change case to obtain a stateid.
3358 *
3359 * Got race?
3360 * Because OPEN is always done by name in nfsv4, it is
3361 * possible that we opened a different file by the same
3362 * name. We can recognize this race condition, but we
3363 * can't do anything about it besides returning an error.
3364 *
3365 * This will be fixed with VFS changes (lookup-intent).
3366 */
3367static int
3368nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3369 struct iattr *sattr)
3370{
2b0143b5 3371 struct inode *inode = d_inode(dentry);
659bfcd6 3372 struct rpc_cred *cred = NULL;
d530838b 3373 struct nfs4_state *state = NULL;
14c43f76 3374 struct nfs4_label *label = NULL;
1da177e4
LT		 3375 int status;
3376
88ac815c
PT		 3377 if (pnfs_ld_layoutret_on_setattr(inode) &&
3378 sattr->ia_valid & ATTR_SIZE &&
3379 sattr->ia_size < i_size_read(inode))
24028672 3380 pnfs_commit_and_return_layout(inode);
8a1636c4 3381
0e574af1 3382 nfs_fattr_init(fattr);
1da177e4 3383
2669940d
AA		 3384 /* Deal with open(O_TRUNC) */
3385 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3386 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3387
3388 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3389 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3390 return 0;
3391
d530838b 3392 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3393 if (sattr->ia_valid & ATTR_FILE) {
3394 struct nfs_open_context *ctx;
3395
3396 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3397 if (ctx) {
3398 cred = ctx->cred;
3399 state = ctx->state;
3400 }
659bfcd6 3401 }
08e9eac4 3402
14c43f76
DQ		 3403 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3404 if (IS_ERR(label))
3405 return PTR_ERR(label);
3406
3407 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3408 if (status == 0) {
f044636d 3409 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3410 nfs_setsecurity(inode, fattr, label);
3411 }
14c43f76 3412 nfs4_label_free(label);
1da177e4
LT		 3413 return status;
3414}
3415
0c2e53f1
TM		 3416static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3417 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3418 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3419{
0c2e53f1 3420 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3421 int status;
3422 struct nfs4_lookup_arg args = {
3423 .bitmask = server->attr_bitmask,
0c2e53f1 3424 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3425 .name = name,
3426 };
3427 struct nfs4_lookup_res res = {
3428 .server = server,
3429 .fattr = fattr,
aa9c2669 3430 .label = label,
2b3de441
DH		 3431 .fh = fhandle,
3432 };
3433 struct rpc_message msg = {
3434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3435 .rpc_argp = &args,
3436 .rpc_resp = &res,
3437 };
3438
aa9c2669
DQ		 3439 args.bitmask = nfs4_bitmask(server, label);
3440
2b3de441
DH		 3441 nfs_fattr_init(fattr);
3442
1da177e4 3443 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3444 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3445 dprintk("NFS reply lookup: %d\n", status);
3446 return status;
3447}
3448
72de53ec 3449static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3450{
7ebb9315 3451 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3452 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3453 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3454 fattr->nlink = 2;
3455}
3456
72de53ec
BS		 3457static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3458 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3459 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3460{
3461 struct nfs4_exception exception = { };
72de53ec 3462 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3463 int err;
3464 do {
1775fd3e 3465 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3466 trace_nfs4_lookup(dir, name, err);
72de53ec 3467 switch (err) {
08ef7bd3 3468 case -NFS4ERR_BADNAME:
72de53ec
BS		 3469 err = -ENOENT;
3470 goto out;
0c2e53f1 3471 case -NFS4ERR_MOVED:
f05d147f 3472 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3473 if (err == -NFS4ERR_MOVED)
3474 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3475 goto out;
0c2e53f1 3476 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3477 err = -EPERM;
3478 if (client != *clnt)
3479 goto out;
66b06860 3480 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3481 if (IS_ERR(client))
3482 return PTR_ERR(client);
3483
3484 exception.retry = 1;
3485 break;
3486 default:
3487 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3488 }
1da177e4 3489 } while (exception.retry);
72de53ec
BS		 3490
3491out:
3492 if (err == 0)
3493 *clnt = client;
3494 else if (client != *clnt)
3495 rpc_shutdown_client(client);
3496
1da177e4
LT		 3497 return err;
3498}
3499
80a16b21 3500static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3501 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3502 struct nfs4_label *label)
72de53ec
BS		 3503{
3504 int status;
3505 struct rpc_clnt *client = NFS_CLIENT(dir);
3506
1775fd3e 3507 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3508 if (client != NFS_CLIENT(dir)) {
3509 rpc_shutdown_client(client);
3510 nfs_fixup_secinfo_attributes(fattr);
3511 }
3512 return status;
3513}
3514
f05d147f
BS		 3515struct rpc_clnt *
3516nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3517 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3518{
b72888cb 3519 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3520 int status;
f05d147f 3521
1775fd3e 3522 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3523 if (status < 0)
f05d147f 3524 return ERR_PTR(status);
b72888cb 3525 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3526}
3527
1da177e4
LT		 3528static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3529{
76b32999 3530 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3531 struct nfs4_accessargs args = {
3532 .fh = NFS_FH(inode),
a4980e78 3533 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3534 };
3535 struct nfs4_accessres res = {
3536 .server = server,
1da177e4 3537 };
1da177e4
LT		 3538 struct rpc_message msg = {
3539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3540 .rpc_argp = &args,
3541 .rpc_resp = &res,
3542 .rpc_cred = entry->cred,
3543 };
3544 int mode = entry->mask;
aa9c2669 3545 int status = 0;
1da177e4
LT		 3546
3547 /*
3548 * Determine which access bits we want to ask for...
3549 */
3550 if (mode & MAY_READ)
3551 args.access |= NFS4_ACCESS_READ;
3552 if (S_ISDIR(inode->i_mode)) {
3553 if (mode & MAY_WRITE)
3554 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3555 if (mode & MAY_EXEC)
3556 args.access |= NFS4_ACCESS_LOOKUP;
3557 } else {
3558 if (mode & MAY_WRITE)
3559 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3560 if (mode & MAY_EXEC)
3561 args.access |= NFS4_ACCESS_EXECUTE;
3562 }
c407d41a
TM		 3563
3564 res.fattr = nfs_alloc_fattr();
3565 if (res.fattr == NULL)
3566 return -ENOMEM;
3567
7c513058 3568 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3569 if (!status) {
6168f62c 3570 nfs_access_set_mask(entry, res.access);
c407d41a 3571 nfs_refresh_inode(inode, res.fattr);
1da177e4 3572 }
c407d41a 3573 nfs_free_fattr(res.fattr);
1da177e4
LT		 3574 return status;
3575}
3576
3577static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3578{
3579 struct nfs4_exception exception = { };
3580 int err;
3581 do {
c1578b76
TM		 3582 err = _nfs4_proc_access(inode, entry);
3583 trace_nfs4_access(inode, err);
3584 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3585 &exception);
3586 } while (exception.retry);
3587 return err;
3588}
3589
3590/*
3591 * TODO: For the time being, we don't try to get any attributes
3592 * along with any of the zero-copy operations READ, READDIR,
3593 * READLINK, WRITE.
3594 *
3595 * In the case of the first three, we want to put the GETATTR
3596 * after the read-type operation -- this is because it is hard
3597 * to predict the length of a GETATTR response in v4, and thus
3598 * align the READ data correctly. This means that the GETATTR
3599 * may end up partially falling into the page cache, and we should
3600 * shift it into the 'tail' of the xdr_buf before processing.
3601 * To do this efficiently, we need to know the total length
3602 * of data received, which doesn't seem to be available outside
3603 * of the RPC layer.
3604 *
3605 * In the case of WRITE, we also want to put the GETATTR after
3606 * the operation -- in this case because we want to make sure
140150db 3607 * we get the post-operation mtime and size.
1da177e4
LT		 3608 *
3609 * Both of these changes to the XDR layer would in fact be quite
3610 * minor, but I decided to leave them for a subsequent patch.
3611 */
3612static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3613 unsigned int pgbase, unsigned int pglen)
3614{
3615 struct nfs4_readlink args = {
3616 .fh = NFS_FH(inode),
3617 .pgbase = pgbase,
3618 .pglen = pglen,
3619 .pages = &page,
3620 };
f50c7000 3621 struct nfs4_readlink_res res;
1da177e4
LT		 3622 struct rpc_message msg = {
3623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3624 .rpc_argp = &args,
f50c7000 3625 .rpc_resp = &res,
1da177e4
LT		 3626 };
3627
7c513058 3628 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3629}
3630
3631static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3632 unsigned int pgbase, unsigned int pglen)
3633{
3634 struct nfs4_exception exception = { };
3635 int err;
3636 do {
c1578b76
TM		 3637 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3638 trace_nfs4_readlink(inode, err);
3639 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3640 &exception);
3641 } while (exception.retry);
3642 return err;
3643}
3644
1da177e4 3645/*
8867fe58 3646 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3647 */
1da177e4
LT		 3648static int
3649nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3650 int flags)
1da177e4 3651{
aa9c2669 3652 struct nfs4_label l, *ilabel = NULL;
8867fe58 3653 struct nfs_open_context *ctx;
1da177e4 3654 struct nfs4_state *state;
1da177e4
LT		 3655 int status = 0;
3656
8867fe58
MS		 3657 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3658 if (IS_ERR(ctx))
3659 return PTR_ERR(ctx);
3660
aa9c2669
DQ		 3661 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3662
a8a5da99 3663 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3664 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3665 if (IS_ERR(state)) {
3666 status = PTR_ERR(state);
c0204fd2 3667 goto out;
1da177e4 3668 }
1da177e4 3669out:
aa9c2669 3670 nfs4_label_release_security(ilabel);
8867fe58 3671 put_nfs_open_context(ctx);
1da177e4
LT		 3672 return status;
3673}
3674
3675static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3676{
16e42959 3677 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3678 struct nfs_removeargs args = {
1da177e4 3679 .fh = NFS_FH(dir),
26fe5750 3680 .name = *name,
16e42959 3681 };
4fdc17b2 3682 struct nfs_removeres res = {
16e42959 3683 .server = server,
1da177e4 3684 };
1da177e4 3685 struct rpc_message msg = {
4fdc17b2
TM		 3686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3687 .rpc_argp = &args,
3688 .rpc_resp = &res,
1da177e4 3689 };
778d2817 3690 int status;
1da177e4 3691
7c513058 3692 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3693 if (status == 0)
16e42959 3694 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3695 return status;
3696}
3697
3698static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3699{
3700 struct nfs4_exception exception = { };
3701 int err;
3702 do {
078ea3df
TM		 3703 err = _nfs4_proc_remove(dir, name);
3704 trace_nfs4_remove(dir, name, err);
3705 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3706 &exception);
3707 } while (exception.retry);
3708 return err;
3709}
3710
e4eff1a6 3711static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3712{
e4eff1a6
TM		 3713 struct nfs_server *server = NFS_SERVER(dir);
3714 struct nfs_removeargs *args = msg->rpc_argp;
3715 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3716
e4eff1a6 3717 res->server = server;
1da177e4 3718 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3719 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3720
3721 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3722}
3723
34e137cc
BS		 3724static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3725{
d9afbd1b
TM		 3726 nfs4_setup_sequence(NFS_SERVER(data->dir),
3727 &data->args.seq_args,
3728 &data->res.seq_res,
3729 task);
1da177e4
LT		 3730}
3731
e4eff1a6 3732static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3733{
078ea3df
TM		 3734 struct nfs_unlinkdata *data = task->tk_calldata;
3735 struct nfs_removeres *res = &data->res;
e4eff1a6 3736
14516c3a
TM		 3737 if (!nfs4_sequence_done(task, &res->seq_res))
3738 return 0;
8478eaa1
N		 3739 if (nfs4_async_handle_error(task, res->server, NULL,
3740 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3741 return 0;
3742 update_changeattr(dir, &res->cinfo);
e4eff1a6 3743 return 1;
1da177e4
LT		 3744}
3745
d3d4152a
JL		 3746static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3747{
3748 struct nfs_server *server = NFS_SERVER(dir);
3749 struct nfs_renameargs *arg = msg->rpc_argp;
3750 struct nfs_renameres *res = msg->rpc_resp;
3751
3752 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3753 res->server = server;
a9c92d6b 3754 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3755}
3756
c6bfa1a1
BS		 3757static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3758{
d9afbd1b
TM		 3759 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3760 &data->args.seq_args,
3761 &data->res.seq_res,
3762 task);
d3d4152a
JL		 3763}
3764
3765static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3766 struct inode *new_dir)
3767{
fbc6f7c2
TM		 3768 struct nfs_renamedata *data = task->tk_calldata;
3769 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3770
3771 if (!nfs4_sequence_done(task, &res->seq_res))
3772 return 0;
8478eaa1 3773 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3774 return 0;
3775
3776 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3777 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3778 return 1;
3779}
3780
1da177e4
LT		 3781static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3782{
91ba2eee 3783 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3784 struct nfs4_link_arg arg = {
3785 .fh = NFS_FH(inode),
3786 .dir_fh = NFS_FH(dir),
3787 .name = name,
91ba2eee
TM		 3788 .bitmask = server->attr_bitmask,
3789 };
91ba2eee
TM		 3790 struct nfs4_link_res res = {
3791 .server = server,
1775fd3e 3792 .label = NULL,
1da177e4 3793 };
1da177e4
LT		 3794 struct rpc_message msg = {
3795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3796 .rpc_argp = &arg,
91ba2eee 3797 .rpc_resp = &res,
1da177e4 3798 };
136f2627
TM		 3799 int status = -ENOMEM;
3800
3801 res.fattr = nfs_alloc_fattr();
778d2817 3802 if (res.fattr == NULL)
136f2627 3803 goto out;
1da177e4 3804
14c43f76
DQ		 3805 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3806 if (IS_ERR(res.label)) {
3807 status = PTR_ERR(res.label);
3808 goto out;
3809 }
aa9c2669 3810 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3811
7c513058 3812 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3813 if (!status) {
3814 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3815 status = nfs_post_op_update_inode(inode, res.fattr);
3816 if (!status)
3817 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3818 }
14c43f76
DQ		 3819
3820
3821 nfs4_label_free(res.label);
3822
136f2627 3823out:
136f2627 3824 nfs_free_fattr(res.fattr);
1da177e4
LT		 3825 return status;
3826}
3827
3828static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3829{
3830 struct nfs4_exception exception = { };
3831 int err;
3832 do {
3833 err = nfs4_handle_exception(NFS_SERVER(inode),
3834 _nfs4_proc_link(inode, dir, name),
3835 &exception);
3836 } while (exception.retry);
3837 return err;
3838}
3839
57dc9a57
TM		 3840struct nfs4_createdata {
3841 struct rpc_message msg;
3842 struct nfs4_create_arg arg;
3843 struct nfs4_create_res res;
3844 struct nfs_fh fh;
3845 struct nfs_fattr fattr;
1775fd3e 3846 struct nfs4_label *label;
57dc9a57
TM		 3847};
3848
3849static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3850 struct qstr *name, struct iattr *sattr, u32 ftype)
3851{
3852 struct nfs4_createdata *data;
3853
3854 data = kzalloc(sizeof(*data), GFP_KERNEL);
3855 if (data != NULL) {
3856 struct nfs_server *server = NFS_SERVER(dir);
3857
14c43f76
DQ		 3858 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3859 if (IS_ERR(data->label))
3860 goto out_free;
3861
57dc9a57
TM		 3862 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3863 data->msg.rpc_argp = &data->arg;
3864 data->msg.rpc_resp = &data->res;
3865 data->arg.dir_fh = NFS_FH(dir);
3866 data->arg.server = server;
3867 data->arg.name = name;
3868 data->arg.attrs = sattr;
3869 data->arg.ftype = ftype;
aa9c2669 3870 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3871 data->res.server = server;
3872 data->res.fh = &data->fh;
3873 data->res.fattr = &data->fattr;
1775fd3e 3874 data->res.label = data->label;
57dc9a57 3875 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3876 }
3877 return data;
14c43f76
DQ		 3878out_free:
3879 kfree(data);
3880 return NULL;
57dc9a57
TM		 3881}
3882
3883static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3884{
7c513058 3885 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3886 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3887 if (status == 0) {
3888 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3889 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3890 }
3891 return status;
3892}
3893
3894static void nfs4_free_createdata(struct nfs4_createdata *data)
3895{
14c43f76 3896 nfs4_label_free(data->label);
57dc9a57
TM		 3897 kfree(data);
3898}
3899
4f390c15 3900static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3901 struct page *page, unsigned int len, struct iattr *sattr,
3902 struct nfs4_label *label)
1da177e4 3903{
57dc9a57
TM		 3904 struct nfs4_createdata *data;
3905 int status = -ENAMETOOLONG;
1da177e4 3906
94a6d753 3907 if (len > NFS4_MAXPATHLEN)
57dc9a57 3908 goto out;
4f390c15 3909
57dc9a57
TM		 3910 status = -ENOMEM;
3911 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3912 if (data == NULL)
3913 goto out;
3914
3915 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3916 data->arg.u.symlink.pages = &page;
3917 data->arg.u.symlink.len = len;
1775fd3e 3918 data->arg.label = label;
1da177e4 3919
57dc9a57
TM		 3920 status = nfs4_do_create(dir, dentry, data);
3921
3922 nfs4_free_createdata(data);
3923out:
1da177e4
LT		 3924 return status;
3925}
3926
4f390c15 3927static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3928 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3929{
3930 struct nfs4_exception exception = { };
aa9c2669 3931 struct nfs4_label l, *label = NULL;
1da177e4 3932 int err;
aa9c2669
DQ		 3933
3934 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3935
1da177e4 3936 do {
078ea3df
TM		 3937 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3938 trace_nfs4_symlink(dir, &dentry->d_name, err);
3939 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3940 &exception);
3941 } while (exception.retry);
aa9c2669
DQ		 3942
3943 nfs4_label_release_security(label);
1da177e4
LT		 3944 return err;
3945}
3946
3947static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3948 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3949{
57dc9a57
TM		 3950 struct nfs4_createdata *data;
3951 int status = -ENOMEM;
1da177e4 3952
57dc9a57
TM		 3953 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3954 if (data == NULL)
3955 goto out;
3956
1775fd3e 3957 data->arg.label = label;
57dc9a57
TM		 3958 status = nfs4_do_create(dir, dentry, data);
3959
3960 nfs4_free_createdata(data);
3961out:
1da177e4
LT		 3962 return status;
3963}
3964
3965static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3966 struct iattr *sattr)
3967{
3968 struct nfs4_exception exception = { };
aa9c2669 3969 struct nfs4_label l, *label = NULL;
1da177e4 3970 int err;
a8a5da99 3971
aa9c2669
DQ		 3972 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3973
a8a5da99 3974 sattr->ia_mode &= ~current_umask();
1da177e4 3975 do {
078ea3df
TM		 3976 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3977 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3978 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3979 &exception);
3980 } while (exception.retry);
aa9c2669
DQ		 3981 nfs4_label_release_security(label);
3982
1da177e4
LT		 3983 return err;
3984}
3985
3986static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3987 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3988{
2b0143b5 3989 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3990 struct nfs4_readdir_arg args = {
3991 .fh = NFS_FH(dir),
56e4ebf8 3992 .pages = pages,
1da177e4
LT		 3993 .pgbase = 0,
3994 .count = count,
2b0143b5 3995 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3996 .plus = plus,
1da177e4
LT		 3997 };
3998 struct nfs4_readdir_res res;
3999 struct rpc_message msg = {
4000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4001 .rpc_argp = &args,
4002 .rpc_resp = &res,
4003 .rpc_cred = cred,
4004 };
4005 int status;
4006
6de1472f
AV		 4007 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4008 dentry,
eadf4598 4009 (unsigned long long)cookie);
c3f52af3 4010 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4011 res.pgbase = args.pgbase;
7c513058 4012 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4013 if (status >= 0) {
c3f52af3 4014 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4015 status += args.pgbase;
4016 }
c4812998
TM		 4017
4018 nfs_invalidate_atime(dir);
4019
3110ff80 4020 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4021 return status;
4022}
4023
4024static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4025 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4026{
4027 struct nfs4_exception exception = { };
4028 int err;
4029 do {
c1578b76
TM		 4030 err = _nfs4_proc_readdir(dentry, cred, cookie,
4031 pages, count, plus);
2b0143b5
DH		 4032 trace_nfs4_readdir(d_inode(dentry), err);
4033 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4034 &exception);
4035 } while (exception.retry);
4036 return err;
4037}
4038
4039static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4040 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4041{
57dc9a57
TM		 4042 struct nfs4_createdata *data;
4043 int mode = sattr->ia_mode;
4044 int status = -ENOMEM;
1da177e4 4045
57dc9a57
TM		 4046 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4047 if (data == NULL)
4048 goto out;
4049
1da177e4 4050 if (S_ISFIFO(mode))
57dc9a57 4051 data->arg.ftype = NF4FIFO;
1da177e4 4052 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4053 data->arg.ftype = NF4BLK;
4054 data->arg.u.device.specdata1 = MAJOR(rdev);
4055 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4056 }
4057 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4058 data->arg.ftype = NF4CHR;
4059 data->arg.u.device.specdata1 = MAJOR(rdev);
4060 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4061 } else if (!S_ISSOCK(mode)) {
4062 status = -EINVAL;
4063 goto out_free;
1da177e4 4064 }
1775fd3e 4065
aa9c2669 4066 data->arg.label = label;
57dc9a57 4067 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4068out_free:
57dc9a57
TM		 4069 nfs4_free_createdata(data);
4070out:
1da177e4
LT		 4071 return status;
4072}
4073
4074static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4075 struct iattr *sattr, dev_t rdev)
4076{
4077 struct nfs4_exception exception = { };
aa9c2669 4078 struct nfs4_label l, *label = NULL;
1da177e4 4079 int err;
a8a5da99 4080
aa9c2669
DQ		 4081 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4082
a8a5da99 4083 sattr->ia_mode &= ~current_umask();
1da177e4 4084 do {
078ea3df
TM		 4085 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4086 trace_nfs4_mknod(dir, &dentry->d_name, err);
4087 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4088 &exception);
4089 } while (exception.retry);
aa9c2669
DQ		 4090
4091 nfs4_label_release_security(label);
4092
1da177e4
LT		 4093 return err;
4094}
4095
4096static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4097 struct nfs_fsstat *fsstat)
4098{
4099 struct nfs4_statfs_arg args = {
4100 .fh = fhandle,
4101 .bitmask = server->attr_bitmask,
4102 };
24ad148a
BH		 4103 struct nfs4_statfs_res res = {
4104 .fsstat = fsstat,
4105 };
1da177e4
LT		 4106 struct rpc_message msg = {
4107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4108 .rpc_argp = &args,
24ad148a 4109 .rpc_resp = &res,
1da177e4
LT		 4110 };
4111
0e574af1 4112 nfs_fattr_init(fsstat->fattr);
7c513058 4113 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4114}
4115
4116static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4117{
4118 struct nfs4_exception exception = { };
4119 int err;
4120 do {
4121 err = nfs4_handle_exception(server,
4122 _nfs4_proc_statfs(server, fhandle, fsstat),
4123 &exception);
4124 } while (exception.retry);
4125 return err;
4126}
4127
4128static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4129 struct nfs_fsinfo *fsinfo)
4130{
4131 struct nfs4_fsinfo_arg args = {
4132 .fh = fhandle,
4133 .bitmask = server->attr_bitmask,
4134 };
3dda5e43
BH		 4135 struct nfs4_fsinfo_res res = {
4136 .fsinfo = fsinfo,
4137 };
1da177e4
LT		 4138 struct rpc_message msg = {
4139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4140 .rpc_argp = &args,
3dda5e43 4141 .rpc_resp = &res,
1da177e4
LT		 4142 };
4143
7c513058 4144 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4145}
4146
4147static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4148{
4149 struct nfs4_exception exception = { };
83ca7f5a 4150 unsigned long now = jiffies;
1da177e4
LT		 4151 int err;
4152
4153 do {
83ca7f5a 4154 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4155 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4156 if (err == 0) {
4157 struct nfs_client *clp = server->nfs_client;
4158
4159 spin_lock(&clp->cl_lock);
4160 clp->cl_lease_time = fsinfo->lease_time * HZ;
4161 clp->cl_last_renewal = now;
4162 spin_unlock(&clp->cl_lock);
4163 break;
4164 }
4165 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4166 } while (exception.retry);
4167 return err;
4168}
4169
4170static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4171{
e38eb650
BS		 4172 int error;
4173
0e574af1 4174 nfs_fattr_init(fsinfo->fattr);
e38eb650 4175 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4176 if (error == 0) {
4177 /* block layout checks this! */
4178 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4179 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4180 }
e38eb650
BS		 4181
4182 return error;
1da177e4
LT		 4183}
4184
4185static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4186 struct nfs_pathconf *pathconf)
4187{
4188 struct nfs4_pathconf_arg args = {
4189 .fh = fhandle,
4190 .bitmask = server->attr_bitmask,
4191 };
d45b2989
BH		 4192 struct nfs4_pathconf_res res = {
4193 .pathconf = pathconf,
4194 };
1da177e4
LT		 4195 struct rpc_message msg = {
4196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4197 .rpc_argp = &args,
d45b2989 4198 .rpc_resp = &res,
1da177e4
LT		 4199 };
4200
4201 /* None of the pathconf attributes are mandatory to implement */
4202 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4203 memset(pathconf, 0, sizeof(*pathconf));
4204 return 0;
4205 }
4206
0e574af1 4207 nfs_fattr_init(pathconf->fattr);
7c513058 4208 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4209}
4210
4211static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4212 struct nfs_pathconf *pathconf)
4213{
4214 struct nfs4_exception exception = { };
4215 int err;
4216
4217 do {
4218 err = nfs4_handle_exception(server,
4219 _nfs4_proc_pathconf(server, fhandle, pathconf),
4220 &exception);
4221 } while (exception.retry);
4222 return err;
4223}
4224
5521abfd 4225int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4226 const struct nfs_open_context *ctx,
4227 const struct nfs_lock_context *l_ctx,
4228 fmode_t fmode)
4229{
4230 const struct nfs_lockowner *lockowner = NULL;
4231
4232 if (l_ctx != NULL)
4233 lockowner = &l_ctx->lockowner;
5521abfd 4234 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4235}
4236EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4237
5521abfd
TM		 4238static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4239 const struct nfs_open_context *ctx,
4240 const struct nfs_lock_context *l_ctx,
4241 fmode_t fmode)
4242{
4243 nfs4_stateid current_stateid;
4244
e1253be0
TM		 4245 /* If the current stateid represents a lost lock, then exit */
4246 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4247 return true;
5521abfd
TM		 4248 return nfs4_stateid_match(stateid, &current_stateid);
4249}
4250
4251static bool nfs4_error_stateid_expired(int err)
4252{
4253 switch (err) {
4254 case -NFS4ERR_DELEG_REVOKED:
4255 case -NFS4ERR_ADMIN_REVOKED:
4256 case -NFS4ERR_BAD_STATEID:
4257 case -NFS4ERR_STALE_STATEID:
4258 case -NFS4ERR_OLD_STATEID:
4259 case -NFS4ERR_OPENMODE:
4260 case -NFS4ERR_EXPIRED:
4261 return true;
4262 }
4263 return false;
4264}
4265
d45f60c6 4266void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4267{
d45f60c6 4268 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4269}
4270
d45f60c6 4271static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4272{
d45f60c6 4273 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4274
d45f60c6
WAA		 4275 trace_nfs4_read(hdr, task->tk_status);
4276 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4277 hdr->args.context->state,
4278 NULL) == -EAGAIN) {
d00c5d43 4279 rpc_restart_call_prepare(task);
ec06c096 4280 return -EAGAIN;
1da177e4 4281 }
8850df99 4282
d45f60c6 4283 __nfs4_read_done_cb(hdr);
1da177e4 4284 if (task->tk_status > 0)
d45f60c6 4285 renew_lease(server, hdr->timestamp);
ec06c096 4286 return 0;
1da177e4
LT		 4287}
4288
5521abfd 4289static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4290 struct nfs_pgio_args *args)
5521abfd
TM		 4291{
4292
4293 if (!nfs4_error_stateid_expired(task->tk_status) ||
4294 nfs4_stateid_is_current(&args->stateid,
4295 args->context,
4296 args->lock_context,
4297 FMODE_READ))
4298 return false;
4299 rpc_restart_call_prepare(task);
4300 return true;
4301}
4302
d45f60c6 4303static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4304{
4305
4306 dprintk("--> %s\n", __func__);
4307
d45f60c6 4308 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4309 return -EAGAIN;
d45f60c6 4310 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4311 return -EAGAIN;
d45f60c6
WAA		 4312 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4313 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4314}
4315
d45f60c6
WAA		 4316static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4317 struct rpc_message *msg)
1da177e4 4318{
d45f60c6
WAA		 4319 hdr->timestamp = jiffies;
4320 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4321 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4322 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4323}
4324
d45f60c6
WAA		 4325static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4326 struct nfs_pgio_header *hdr)
ea7c3303 4327{
d45f60c6
WAA		 4328 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4329 &hdr->args.seq_args,
4330 &hdr->res.seq_res,
9b206149 4331 task))
ef1820f9 4332 return 0;
d45f60c6
WAA		 4333 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4334 hdr->args.lock_context,
4335 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4336 return -EIO;
d45f60c6 4337 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4338 return -EIO;
4339 return 0;
1da177e4
LT		 4340}
4341
d45f60c6
WAA		 4342static int nfs4_write_done_cb(struct rpc_task *task,
4343 struct nfs_pgio_header *hdr)
1da177e4 4344{
d45f60c6 4345 struct inode *inode = hdr->inode;
8478eaa1 4346
d45f60c6
WAA		 4347 trace_nfs4_write(hdr, task->tk_status);
4348 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4349 hdr->args.context->state,
4350 NULL) == -EAGAIN) {
d00c5d43 4351 rpc_restart_call_prepare(task);
788e7a89 4352 return -EAGAIN;
1da177e4 4353 }
4f9838c7 4354 if (task->tk_status >= 0) {
d45f60c6 4355 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4356 nfs_writeback_update_inode(hdr);
4f9838c7 4357 }
788e7a89 4358 return 0;
1da177e4
LT		 4359}
4360
5521abfd 4361static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4362 struct nfs_pgio_args *args)
5521abfd
TM		 4363{
4364
4365 if (!nfs4_error_stateid_expired(task->tk_status) ||
4366 nfs4_stateid_is_current(&args->stateid,
4367 args->context,
4368 args->lock_context,
4369 FMODE_WRITE))
4370 return false;
4371 rpc_restart_call_prepare(task);
4372 return true;
4373}
4374
d45f60c6 4375static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4376{
d45f60c6 4377 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4378 return -EAGAIN;
d45f60c6 4379 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4380 return -EAGAIN;
d45f60c6
WAA		 4381 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4382 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4383}
4384
5a37f851 4385static
d45f60c6 4386bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4387{
5a37f851 4388 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4389 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4390 return false;
4391 /* Otherwise, request attributes if and only if we don't hold
4392 * a delegation
4393 */
011e2a7f 4394 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4395}
a69aef14 4396
d45f60c6
WAA		 4397static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4398 struct rpc_message *msg)
1da177e4 4399{
d45f60c6 4400 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4401
d45f60c6
WAA		 4402 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4403 hdr->args.bitmask = NULL;
4404 hdr->res.fattr = NULL;
7ffd1064 4405 } else
d45f60c6 4406 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4407
d45f60c6
WAA		 4408 if (!hdr->pgio_done_cb)
4409 hdr->pgio_done_cb = nfs4_write_done_cb;
4410 hdr->res.server = server;
4411 hdr->timestamp = jiffies;
1da177e4 4412
bdc7f021 4413 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4414 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4415}
4416
0b7c0153 4417static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4418{
d9afbd1b
TM		 4419 nfs4_setup_sequence(NFS_SERVER(data->inode),
4420 &data->args.seq_args,
4421 &data->res.seq_res,
4422 task);
1da177e4
LT		 4423}
4424
0b7c0153 4425static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4426{
1da177e4 4427 struct inode *inode = data->inode;
14516c3a 4428
cc668ab3 4429 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4430 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4431 NULL, NULL) == -EAGAIN) {
d00c5d43 4432 rpc_restart_call_prepare(task);
788e7a89 4433 return -EAGAIN;
1da177e4 4434 }
788e7a89 4435 return 0;
1da177e4
LT		 4436}
4437
0b7c0153 4438static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4439{
4440 if (!nfs4_sequence_done(task, &data->res.seq_res))
4441 return -EAGAIN;
0b7c0153 4442 return data->commit_done_cb(task, data);
5f452431
FI		 4443}
4444
0b7c0153 4445static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4446{
788e7a89 4447 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4448
0b7c0153
FI		 4449 if (data->commit_done_cb == NULL)
4450 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4451 data->res.server = server;
bdc7f021 4452 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4453 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4454}
4455
9bc4e3ca
CL		 4456struct nfs4_renewdata {
4457 struct nfs_client *client;
4458 unsigned long timestamp;
4459};
4460
1da177e4
LT		 4461/*
4462 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4463 * standalone procedure for queueing an asynchronous RENEW.
4464 */
9bc4e3ca 4465static void nfs4_renew_release(void *calldata)
dc96aef9 4466{
9bc4e3ca
CL		 4467 struct nfs4_renewdata *data = calldata;
4468 struct nfs_client *clp = data->client;
dc96aef9 4469
0851de06
AB		 4470 if (atomic_read(&clp->cl_count) > 1)
4471 nfs4_schedule_state_renewal(clp);
4472 nfs_put_client(clp);
9bc4e3ca 4473 kfree(data);
dc96aef9
AB		 4474}
4475
9bc4e3ca 4476static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4477{
9bc4e3ca
CL		 4478 struct nfs4_renewdata *data = calldata;
4479 struct nfs_client *clp = data->client;
4480 unsigned long timestamp = data->timestamp;
1da177e4 4481
c6d01c6f 4482 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4483 switch (task->tk_status) {
4484 case 0:
4485 break;
4486 case -NFS4ERR_LEASE_MOVED:
4487 nfs4_schedule_lease_moved_recovery(clp);
4488 break;
4489 default:
95baa25c 4490 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4491 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4492 return;
4493 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4494 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4495 return;
4496 }
4497 nfs4_schedule_path_down_recovery(clp);
1da177e4 4498 }
452e9352 4499 do_renew_lease(clp, timestamp);
1da177e4
LT		 4500}
4501
963d8fe5
TM		 4502static const struct rpc_call_ops nfs4_renew_ops = {
4503 .rpc_call_done = nfs4_renew_done,
dc96aef9 4504 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4505};
4506
2f60ea6b 4507static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4508{
4509 struct rpc_message msg = {
4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4511 .rpc_argp = clp,
b4454fe1 4512 .rpc_cred = cred,
1da177e4 4513 };
9bc4e3ca 4514 struct nfs4_renewdata *data;
1da177e4 4515
2f60ea6b
TM		 4516 if (renew_flags == 0)
4517 return 0;
0851de06
AB		 4518 if (!atomic_inc_not_zero(&clp->cl_count))
4519 return -EIO;
b569ad34 4520 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4521 if (data == NULL)
4522 return -ENOMEM;
4523 data->client = clp;
4524 data->timestamp = jiffies;
bc7a05ca 4525 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4526 &nfs4_renew_ops, data);
1da177e4
LT		 4527}
4528
8534d4ec 4529static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4530{
4531 struct rpc_message msg = {
4532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4533 .rpc_argp = clp,
b4454fe1 4534 .rpc_cred = cred,
1da177e4
LT		 4535 };
4536 unsigned long now = jiffies;
4537 int status;
4538
bc7a05ca 4539 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4540 if (status < 0)
4541 return status;
452e9352 4542 do_renew_lease(clp, now);
1da177e4
LT		 4543 return 0;
4544}
4545
aa1870af
BF		 4546static inline int nfs4_server_supports_acls(struct nfs_server *server)
4547{
7dd7d959 4548 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4549}
4550
21f498c2
TM		 4551/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4552 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4553 * the stack.
4554 */
21f498c2 4555#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4556
e9e3d724
NH		 4557static int buf_to_pages_noslab(const void *buf, size_t buflen,
4558 struct page **pages, unsigned int *pgbase)
4559{
4560 struct page *newpage, **spages;
4561 int rc = 0;
4562 size_t len;
4563 spages = pages;
4564
4565 do {
21f498c2 4566 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4567 newpage = alloc_page(GFP_KERNEL);
4568
4569 if (newpage == NULL)
4570 goto unwind;
4571 memcpy(page_address(newpage), buf, len);
4572 buf += len;
4573 buflen -= len;
4574 *pages++ = newpage;
4575 rc++;
4576 } while (buflen != 0);
4577
4578 return rc;
4579
4580unwind:
4581 for(; rc > 0; rc--)
4582 __free_page(spages[rc-1]);
4583 return -ENOMEM;
4584}
4585
e50a1c2e
BF		 4586struct nfs4_cached_acl {
4587 int cached;
4588 size_t len;
3e9d4154 4589 char data[0];
e50a1c2e
BF		 4590};
4591
4592static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4593{
4594 struct nfs_inode *nfsi = NFS_I(inode);
4595
4596 spin_lock(&inode->i_lock);
4597 kfree(nfsi->nfs4_acl);
4598 nfsi->nfs4_acl = acl;
4599 spin_unlock(&inode->i_lock);
4600}
4601
4602static void nfs4_zap_acl_attr(struct inode *inode)
4603{
4604 nfs4_set_cached_acl(inode, NULL);
4605}
4606
4607static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4608{
4609 struct nfs_inode *nfsi = NFS_I(inode);
4610 struct nfs4_cached_acl *acl;
4611 int ret = -ENOENT;
4612
4613 spin_lock(&inode->i_lock);
4614 acl = nfsi->nfs4_acl;
4615 if (acl == NULL)
4616 goto out;
4617 if (buf == NULL) /* user is just asking for length */
4618 goto out_len;
4619 if (acl->cached == 0)
4620 goto out;
4621 ret = -ERANGE; /* see getxattr(2) man page */
4622 if (acl->len > buflen)
4623 goto out;
4624 memcpy(buf, acl->data, acl->len);
4625out_len:
4626 ret = acl->len;
4627out:
4628 spin_unlock(&inode->i_lock);
4629 return ret;
4630}
4631
5794d21e 4632static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4633{
4634 struct nfs4_cached_acl *acl;
b291f1b1 4635 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4636
1f1ea6c2 4637 if (buflen <= PAGE_SIZE) {
b291f1b1 4638 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4639 if (acl == NULL)
4640 goto out;
4641 acl->cached = 1;
5794d21e 4642 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4643 } else {
4644 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4645 if (acl == NULL)
4646 goto out;
4647 acl->cached = 0;
4648 }
4649 acl->len = acl_len;
4650out:
4651 nfs4_set_cached_acl(inode, acl);
4652}
4653
bf118a34
AA		 4654/*
4655 * The getxattr API returns the required buffer length when called with a
4656 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4657 * the required buf. On a NULL buf, we send a page of data to the server
4658 * guessing that the ACL request can be serviced by a page. If so, we cache
4659 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4660 * the cache. If not so, we throw away the page, and cache the required
4661 * length. The next getxattr call will then produce another round trip to
4662 * the server, this time with the input buf of the required size.
4663 */
16b4289c 4664static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4665{
bf118a34 4666 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4667 struct nfs_getaclargs args = {
4668 .fh = NFS_FH(inode),
4669 .acl_pages = pages,
4670 .acl_len = buflen,
4671 };
663c79b3
BH		 4672 struct nfs_getaclres res = {
4673 .acl_len = buflen,
4674 };
aa1870af
BF		 4675 struct rpc_message msg = {
4676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4677 .rpc_argp = &args,
663c79b3 4678 .rpc_resp = &res,
aa1870af 4679 };
21f498c2
TM		 4680 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4681 int ret = -ENOMEM, i;
aa1870af 4682
bf118a34
AA		 4683 /* As long as we're doing a round trip to the server anyway,
4684 * let's be prepared for a page of acl data. */
4685 if (npages == 0)
4686 npages = 1;
21f498c2
TM		 4687 if (npages > ARRAY_SIZE(pages))
4688 return -ERANGE;
5a006899 4689
bf118a34
AA		 4690 for (i = 0; i < npages; i++) {
4691 pages[i] = alloc_page(GFP_KERNEL);
4692 if (!pages[i])
4693 goto out_free;
e50a1c2e 4694 }
5a006899
SP		 4695
4696 /* for decoding across pages */
4697 res.acl_scratch = alloc_page(GFP_KERNEL);
4698 if (!res.acl_scratch)
4699 goto out_free;
4700
bf118a34
AA		 4701 args.acl_len = npages * PAGE_SIZE;
4702 args.acl_pgbase = 0;
5a006899 4703
de040bec 4704 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4705 __func__, buf, buflen, npages, args.acl_len);
4706 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4707 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4708 if (ret)
4709 goto out_free;
bf118a34 4710
1f1ea6c2
TM		 4711 /* Handle the case where the passed-in buffer is too short */
4712 if (res.acl_flags & NFS4_ACL_TRUNC) {
4713 /* Did the user only issue a request for the acl length? */
4714 if (buf == NULL)
4715 goto out_ok;
e50a1c2e 4716 ret = -ERANGE;
1f1ea6c2 4717 goto out_free;
e50a1c2e 4718 }
1f1ea6c2 4719 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4720 if (buf) {
4721 if (res.acl_len > buflen) {
4722 ret = -ERANGE;
4723 goto out_free;
4724 }
1f1ea6c2 4725 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4726 }
1f1ea6c2
TM		 4727out_ok:
4728 ret = res.acl_len;
e50a1c2e 4729out_free:
bf118a34
AA		 4730 for (i = 0; i < npages; i++)
4731 if (pages[i])
4732 __free_page(pages[i]);
331818f1
TM		 4733 if (res.acl_scratch)
4734 __free_page(res.acl_scratch);
aa1870af
BF		 4735 return ret;
4736}
4737
16b4289c
TM		 4738static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4739{
4740 struct nfs4_exception exception = { };
4741 ssize_t ret;
4742 do {
4743 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4744 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4745 if (ret >= 0)
4746 break;
4747 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4748 } while (exception.retry);
4749 return ret;
4750}
4751
e50a1c2e
BF		 4752static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4753{
4754 struct nfs_server *server = NFS_SERVER(inode);
4755 int ret;
4756
4757 if (!nfs4_server_supports_acls(server))
4758 return -EOPNOTSUPP;
4759 ret = nfs_revalidate_inode(server, inode);
4760 if (ret < 0)
4761 return ret;
08a22b39
AK		 4762 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4763 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4764 ret = nfs4_read_cached_acl(inode, buf, buflen);
4765 if (ret != -ENOENT)
bf118a34
AA		 4766 /* -ENOENT is returned if there is no ACL or if there is an ACL
4767 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4768 return ret;
4769 return nfs4_get_acl_uncached(inode, buf, buflen);
4770}
4771
16b4289c 4772static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4773{
4774 struct nfs_server *server = NFS_SERVER(inode);
4775 struct page *pages[NFS4ACL_MAXPAGES];
4776 struct nfs_setaclargs arg = {
4777 .fh = NFS_FH(inode),
4778 .acl_pages = pages,
4779 .acl_len = buflen,
4780 };
73c403a9 4781 struct nfs_setaclres res;
4b580ee3
BF		 4782 struct rpc_message msg = {
4783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4784 .rpc_argp = &arg,
73c403a9 4785 .rpc_resp = &res,
4b580ee3 4786 };
21f498c2 4787 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4788 int ret, i;
4b580ee3
BF		 4789
4790 if (!nfs4_server_supports_acls(server))
4791 return -EOPNOTSUPP;
21f498c2
TM		 4792 if (npages > ARRAY_SIZE(pages))
4793 return -ERANGE;
e9e3d724
NH		 4794 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4795 if (i < 0)
4796 return i;
57ec14c5 4797 nfs4_inode_return_delegation(inode);
7c513058 4798 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4799
4800 /*
4801 * Free each page after tx, so the only ref left is
4802 * held by the network stack
4803 */
4804 for (; i > 0; i--)
4805 put_page(pages[i-1]);
4806
08a22b39
AK		 4807 /*
4808 * Acl update can result in inode attribute update.
4809 * so mark the attribute cache invalid.
4810 */
4811 spin_lock(&inode->i_lock);
4812 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4813 spin_unlock(&inode->i_lock);
f41f7418
TM		 4814 nfs_access_zap_cache(inode);
4815 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4816 return ret;
4817}
4818
16b4289c
TM		 4819static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4820{
4821 struct nfs4_exception exception = { };
4822 int err;
4823 do {
c1578b76
TM		 4824 err = __nfs4_proc_set_acl(inode, buf, buflen);
4825 trace_nfs4_set_acl(inode, err);
4826 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4827 &exception);
4828 } while (exception.retry);
4829 return err;
4830}
4831
aa9c2669
DQ		 4832#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4833static int _nfs4_get_security_label(struct inode *inode, void *buf,
4834 size_t buflen)
4835{
4836 struct nfs_server *server = NFS_SERVER(inode);
4837 struct nfs_fattr fattr;
4838 struct nfs4_label label = {0, 0, buflen, buf};
4839
4840 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4841 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4842 .fh = NFS_FH(inode),
4843 .bitmask = bitmask,
4844 };
4845 struct nfs4_getattr_res res = {
4846 .fattr = &fattr,
4847 .label = &label,
4848 .server = server,
4849 };
4850 struct rpc_message msg = {
4851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4852 .rpc_argp = &arg,
aa9c2669
DQ		 4853 .rpc_resp = &res,
4854 };
4855 int ret;
4856
4857 nfs_fattr_init(&fattr);
4858
fcb63a9b 4859 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4860 if (ret)
4861 return ret;
4862 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4863 return -ENOENT;
4864 if (buflen < label.len)
4865 return -ERANGE;
4866 return 0;
4867}
4868
4869static int nfs4_get_security_label(struct inode *inode, void *buf,
4870 size_t buflen)
4871{
4872 struct nfs4_exception exception = { };
4873 int err;
4874
4875 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4876 return -EOPNOTSUPP;
4877
4878 do {
c1578b76
TM		 4879 err = _nfs4_get_security_label(inode, buf, buflen);
4880 trace_nfs4_get_security_label(inode, err);
4881 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4882 &exception);
4883 } while (exception.retry);
4884 return err;
4885}
4886
4887static int _nfs4_do_set_security_label(struct inode *inode,
4888 struct nfs4_label *ilabel,
4889 struct nfs_fattr *fattr,
4890 struct nfs4_label *olabel)
4891{
4892
4893 struct iattr sattr = {0};
4894 struct nfs_server *server = NFS_SERVER(inode);
4895 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4896 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4897 .fh = NFS_FH(inode),
4898 .iap = &sattr,
4899 .server = server,
4900 .bitmask = bitmask,
4901 .label = ilabel,
4902 };
4903 struct nfs_setattrres res = {
4904 .fattr = fattr,
4905 .label = olabel,
4906 .server = server,
4907 };
4908 struct rpc_message msg = {
4909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4910 .rpc_argp = &arg,
aa9c2669
DQ		 4911 .rpc_resp = &res,
4912 };
4913 int status;
4914
12207f69 4915 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4916
12207f69 4917 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4918 if (status)
4919 dprintk("%s failed: %d\n", __func__, status);
4920
4921 return status;
4922}
4923
4924static int nfs4_do_set_security_label(struct inode *inode,
4925 struct nfs4_label *ilabel,
4926 struct nfs_fattr *fattr,
4927 struct nfs4_label *olabel)
4928{
4929 struct nfs4_exception exception = { };
4930 int err;
4931
4932 do {
c1578b76
TM		 4933 err = _nfs4_do_set_security_label(inode, ilabel,
4934 fattr, olabel);
4935 trace_nfs4_set_security_label(inode, err);
4936 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4937 &exception);
4938 } while (exception.retry);
4939 return err;
4940}
4941
4942static int
4943nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4944{
4945 struct nfs4_label ilabel, *olabel = NULL;
4946 struct nfs_fattr fattr;
4947 struct rpc_cred *cred;
2b0143b5 4948 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4949 int status;
4950
4951 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4952 return -EOPNOTSUPP;
4953
4954 nfs_fattr_init(&fattr);
4955
4956 ilabel.pi = 0;
4957 ilabel.lfs = 0;
4958 ilabel.label = (char *)buf;
4959 ilabel.len = buflen;
4960
4961 cred = rpc_lookup_cred();
4962 if (IS_ERR(cred))
4963 return PTR_ERR(cred);
4964
4965 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4966 if (IS_ERR(olabel)) {
4967 status = -PTR_ERR(olabel);
4968 goto out;
4969 }
4970
4971 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4972 if (status == 0)
4973 nfs_setsecurity(inode, &fattr, olabel);
4974
4975 nfs4_label_free(olabel);
4976out:
4977 put_rpccred(cred);
4978 return status;
4979}
4980#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4981
4982
1da177e4 4983static int
8478eaa1
N		 4984nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4985 struct nfs4_state *state, long *timeout)
1da177e4 4986{
aa5190d0
TM		 4987 struct nfs_client *clp = server->nfs_client;
4988
4989 if (task->tk_status >= 0)
1da177e4
LT		 4990 return 0;
4991 switch(task->tk_status) {
a1d0b5ee 4992 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4993 case -NFS4ERR_ADMIN_REVOKED:
4994 case -NFS4ERR_BAD_STATEID:
4995 case -NFS4ERR_OPENMODE:
4996 if (state == NULL)
4997 break;
5d422301 4998 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4999 goto recovery_failed;
0400a6b0 5000 goto wait_on_recovery;
0ced63d1 5001 case -NFS4ERR_EXPIRED:
5d422301
TM		 5002 if (state != NULL) {
5003 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 5004 goto recovery_failed;
5d422301 5005 }
1da177e4 5006 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5007 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 5008 nfs4_schedule_lease_recovery(clp);
5009 goto wait_on_recovery;
519ae255
CL		 5010 case -NFS4ERR_MOVED:
5011 if (nfs4_schedule_migration_recovery(server) < 0)
5012 goto recovery_failed;
5013 goto wait_on_recovery;
8ef2f8d4
CL		 5014 case -NFS4ERR_LEASE_MOVED:
5015 nfs4_schedule_lease_moved_recovery(clp);
5016 goto wait_on_recovery;
4745e315
AA		 5017#if defined(CONFIG_NFS_V4_1)
5018 case -NFS4ERR_BADSESSION:
5019 case -NFS4ERR_BADSLOT:
5020 case -NFS4ERR_BAD_HIGH_SLOT:
5021 case -NFS4ERR_DEADSESSION:
5022 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5023 case -NFS4ERR_SEQ_FALSE_RETRY:
5024 case -NFS4ERR_SEQ_MISORDERED:
5025 dprintk("%s ERROR %d, Reset session\n", __func__,
5026 task->tk_status);
9f594791 5027 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 5028 goto wait_on_recovery;
4745e315 5029#endif /* CONFIG_NFS_V4_1 */
1da177e4 5030 case -NFS4ERR_DELAY:
aa5190d0 5031 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 5032 rpc_delay(task, nfs4_update_delay(timeout));
5033 goto restart_call;
006ea73e 5034 case -NFS4ERR_GRACE:
1da177e4 5035 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 5036 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 5037 case -NFS4ERR_OLD_STATEID:
f1478c13 5038 goto restart_call;
1da177e4
LT		 5039 }
5040 task->tk_status = nfs4_map_errors(task->tk_status);
5041 return 0;
9f51a78e 5042recovery_failed:
5d422301
TM		 5043 task->tk_status = -EIO;
5044 return 0;
0400a6b0 5045wait_on_recovery:
a2c0b9e2 5046 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 5047 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5048 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 5049 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5050 goto recovery_failed;
f1478c13 5051restart_call:
a2c0b9e2
TM		 5052 task->tk_status = 0;
5053 return -EAGAIN;
1da177e4
LT		 5054}
5055
f092075d
CL		 5056static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5057 nfs4_verifier *bootverf)
cd93710e
CL		 5058{
5059 __be32 verf[2];
5060
2c820d9a
CL		 5061 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5062 /* An impossible timestamp guarantees this value
5063 * will never match a generated boot time. */
5064 verf[0] = 0;
17f26b12 5065 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5066 } else {
f092075d 5067 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5068 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5069 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5070 }
cd93710e
CL		 5071 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5072}
5073
a3192688
JL		 5074static int
5075nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5076{
a3192688
JL		 5077 int result;
5078 size_t len;
5079 char *str;
e984a55a 5080
ceb3a16c 5081 if (clp->cl_owner_id != NULL)
a3192688 5082 return 0;
4a3e5779 5083
a3192688 5084 rcu_read_lock();
4a70316c 5085 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5086 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5087 1 +
5088 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5089 1;
5090 rcu_read_unlock();
5091
5092 if (len > NFS4_OPAQUE_LIMIT + 1)
5093 return -EINVAL;
5094
5095 /*
5096 * Since this string is allocated at mount time, and held until the
5097 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5098 * about a memory-reclaim deadlock.
5099 */
5100 str = kmalloc(len, GFP_KERNEL);
5101 if (!str)
5102 return -ENOMEM;
ceb3a16c 5103
e984a55a 5104 rcu_read_lock();
a3192688
JL		 5105 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5106 clp->cl_ipaddr,
5107 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5108 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5109 rcu_read_unlock();
a3192688 5110
a3192688
JL		 5111 clp->cl_owner_id = str;
5112 return 0;
e984a55a
CL		 5113}
5114
873e3851
JL		 5115static int
5116nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5117{
5118 int result;
5119 size_t len;
5120 char *str;
5121
5122 len = 10 + 10 + 1 + 10 + 1 +
5123 strlen(nfs4_client_id_uniquifier) + 1 +
5124 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5125
5126 if (len > NFS4_OPAQUE_LIMIT + 1)
5127 return -EINVAL;
5128
5129 /*
5130 * Since this string is allocated at mount time, and held until the
5131 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5132 * about a memory-reclaim deadlock.
5133 */
5134 str = kmalloc(len, GFP_KERNEL);
5135 if (!str)
5136 return -ENOMEM;
5137
5138 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5139 clp->rpc_ops->version, clp->cl_minorversion,
5140 nfs4_client_id_uniquifier,
5141 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5142 clp->cl_owner_id = str;
5143 return 0;
5144}
5145
5146static int
5147nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5148{
873e3851
JL		 5149 int result;
5150 size_t len;
5151 char *str;
ceb3a16c
TM		 5152
5153 if (clp->cl_owner_id != NULL)
873e3851 5154 return 0;
6f2ea7f2
CL		 5155
5156 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5157 return nfs4_init_uniquifier_client_string(clp);
5158
5159 len = 10 + 10 + 1 + 10 + 1 +
5160 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5161
5162 if (len > NFS4_OPAQUE_LIMIT + 1)
5163 return -EINVAL;
5164
5165 /*
5166 * Since this string is allocated at mount time, and held until the
5167 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5168 * about a memory-reclaim deadlock.
5169 */
5170 str = kmalloc(len, GFP_KERNEL);
5171 if (!str)
5172 return -ENOMEM;
5173
5174 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5175 clp->rpc_ops->version, clp->cl_minorversion,
5176 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5177 clp->cl_owner_id = str;
5178 return 0;
e984a55a
CL		 5179}
5180
706cb8db
CL		 5181/*
5182 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5183 * services. Advertise one based on the address family of the
5184 * clientaddr.
5185 */
5186static unsigned int
5187nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5188{
5189 if (strchr(clp->cl_ipaddr, ':') != NULL)
5190 return scnprintf(buf, len, "tcp6");
5191 else
5192 return scnprintf(buf, len, "tcp");
5193}
5194
f11b2a1c
JL		 5195static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5196{
5197 struct nfs4_setclientid *sc = calldata;
5198
5199 if (task->tk_status == 0)
5200 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5201}
5202
5203static const struct rpc_call_ops nfs4_setclientid_ops = {
5204 .rpc_call_done = nfs4_setclientid_done,
5205};
5206
6bbb4ae8
CL		 5207/**
5208 * nfs4_proc_setclientid - Negotiate client ID
5209 * @clp: state data structure
5210 * @program: RPC program for NFSv4 callback service
5211 * @port: IP port number for NFS4 callback service
5212 * @cred: RPC credential to use for this call
5213 * @res: where to place the result
5214 *
5215 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5216 */
bb8b27e5
TM		 5217int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5218 unsigned short port, struct rpc_cred *cred,
5219 struct nfs4_setclientid_res *res)
1da177e4
LT		 5220{
5221 nfs4_verifier sc_verifier;
5222 struct nfs4_setclientid setclientid = {
5223 .sc_verifier = &sc_verifier,
5224 .sc_prog = program,
3a6bb738 5225 .sc_clnt = clp,
1da177e4
LT		 5226 };
5227 struct rpc_message msg = {
5228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5229 .rpc_argp = &setclientid,
bb8b27e5 5230 .rpc_resp = res,
286d7d6a 5231 .rpc_cred = cred,
1da177e4 5232 };
f11b2a1c
JL		 5233 struct rpc_task *task;
5234 struct rpc_task_setup task_setup_data = {
5235 .rpc_client = clp->cl_rpcclient,
5236 .rpc_message = &msg,
5237 .callback_ops = &nfs4_setclientid_ops,
5238 .callback_data = &setclientid,
5239 .flags = RPC_TASK_TIMEOUT,
5240 };
6bbb4ae8 5241 int status;
1da177e4 5242
de734831 5243 /* nfs_client_id4 */
f092075d 5244 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5245
5246 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5247 status = nfs4_init_uniform_client_string(clp);
5248 else
a3192688 5249 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5250
5251 if (status)
5252 goto out;
3a6bb738 5253
de734831 5254 /* cb_client4 */
706cb8db
CL		 5255 setclientid.sc_netid_len =
5256 nfs4_init_callback_netid(clp,
5257 setclientid.sc_netid,
5258 sizeof(setclientid.sc_netid));
de734831 5259 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5260 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5261 clp->cl_ipaddr, port >> 8, port & 255);
5262
3a6bb738 5263 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5264 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5265 clp->cl_owner_id);
f11b2a1c
JL		 5266 task = rpc_run_task(&task_setup_data);
5267 if (IS_ERR(task)) {
5268 status = PTR_ERR(task);
5269 goto out;
5270 }
5271 status = task->tk_status;
5272 if (setclientid.sc_cred) {
5273 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5274 put_rpccred(setclientid.sc_cred);
5275 }
5276 rpc_put_task(task);
5277out:
c6d01c6f 5278 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5279 dprintk("NFS reply setclientid: %d\n", status);
5280 return status;
1da177e4
LT		 5281}
5282
6bbb4ae8
CL		 5283/**
5284 * nfs4_proc_setclientid_confirm - Confirm client ID
5285 * @clp: state data structure
5286 * @res: result of a previous SETCLIENTID
5287 * @cred: RPC credential to use for this call
5288 *
5289 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5290 */
fd954ae1 5291int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5292 struct nfs4_setclientid_res *arg,
5293 struct rpc_cred *cred)
1da177e4 5294{
1da177e4
LT		 5295 struct rpc_message msg = {
5296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5297 .rpc_argp = arg,
286d7d6a 5298 .rpc_cred = cred,
1da177e4 5299 };
1da177e4
LT		 5300 int status;
5301
6bbb4ae8
CL		 5302 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5303 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5304 clp->cl_clientid);
1bd714f2 5305 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5306 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5307 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5308 return status;
5309}
5310
fe650407
TM		 5311struct nfs4_delegreturndata {
5312 struct nfs4_delegreturnargs args;
fa178f29 5313 struct nfs4_delegreturnres res;
fe650407
TM		 5314 struct nfs_fh fh;
5315 nfs4_stateid stateid;
26e976a8 5316 unsigned long timestamp;
fa178f29 5317 struct nfs_fattr fattr;
fe650407 5318 int rpc_status;
039b756a
PT		 5319 struct inode *inode;
5320 bool roc;
5321 u32 roc_barrier;
fe650407
TM		 5322};
5323
fe650407
TM		 5324static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5325{
5326 struct nfs4_delegreturndata *data = calldata;
938e1010 5327
14516c3a
TM		 5328 if (!nfs4_sequence_done(task, &data->res.seq_res))
5329 return;
938e1010 5330
ca8acf8d 5331 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5332 switch (task->tk_status) {
79708861 5333 case 0:
fa178f29 5334 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5335 case -NFS4ERR_ADMIN_REVOKED:
5336 case -NFS4ERR_DELEG_REVOKED:
5337 case -NFS4ERR_BAD_STATEID:
5338 case -NFS4ERR_OLD_STATEID:
5339 case -NFS4ERR_STALE_STATEID:
5340 case -NFS4ERR_EXPIRED:
5341 task->tk_status = 0;
039b756a
PT		 5342 if (data->roc)
5343 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5344 break;
79708861 5345 default:
8478eaa1
N		 5346 if (nfs4_async_handle_error(task, data->res.server,
5347 NULL, NULL) == -EAGAIN) {
d00c5d43 5348 rpc_restart_call_prepare(task);
79708861
RL		 5349 return;
5350 }
5351 }
5352 data->rpc_status = task->tk_status;
fe650407
TM		 5353}
5354
5355static void nfs4_delegreturn_release(void *calldata)
5356{
039b756a 5357 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5358 struct inode *inode = data->inode;
039b756a 5359
ea7c38fe
TM		 5360 if (inode) {
5361 if (data->roc)
5362 pnfs_roc_release(inode);
5363 nfs_iput_and_deactive(inode);
5364 }
fe650407
TM		 5365 kfree(calldata);
5366}
5367
938e1010
AA		 5368static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5369{
5370 struct nfs4_delegreturndata *d_data;
5371
5372 d_data = (struct nfs4_delegreturndata *)data;
5373
500d701f
PT		 5374 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5375 return;
5376
4ff376fe
TM		 5377 if (d_data->roc)
5378 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5379
d9afbd1b
TM		 5380 nfs4_setup_sequence(d_data->res.server,
5381 &d_data->args.seq_args,
5382 &d_data->res.seq_res,
5383 task);
938e1010 5384}
938e1010 5385
c8d149f3 5386static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5387 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5388 .rpc_call_done = nfs4_delegreturn_done,
5389 .rpc_release = nfs4_delegreturn_release,
5390};
5391
e6f81075 5392static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5393{
5394 struct nfs4_delegreturndata *data;
fa178f29 5395 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5396 struct rpc_task *task;
5138fde0
TM		 5397 struct rpc_message msg = {
5398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5399 .rpc_cred = cred,
5400 };
c970aa85
TM		 5401 struct rpc_task_setup task_setup_data = {
5402 .rpc_client = server->client,
5138fde0 5403 .rpc_message = &msg,
c970aa85
TM		 5404 .callback_ops = &nfs4_delegreturn_ops,
5405 .flags = RPC_TASK_ASYNC,
5406 };
e6f81075 5407 int status = 0;
fe650407 5408
8535b2be 5409 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5410 if (data == NULL)
5411 return -ENOMEM;
a9c92d6b 5412 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5413 data->args.fhandle = &data->fh;
5414 data->args.stateid = &data->stateid;
9e907fec 5415 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5416 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5417 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5418 data->res.fattr = &data->fattr;
5419 data->res.server = server;
5138fde0 5420 nfs_fattr_init(data->res.fattr);
26e976a8 5421 data->timestamp = jiffies;
fe650407 5422 data->rpc_status = 0;
ea7c38fe
TM		 5423 data->inode = nfs_igrab_and_active(inode);
5424 if (data->inode)
5425 data->roc = nfs4_roc(inode);
fe650407 5426
c970aa85 5427 task_setup_data.callback_data = data;
1174dd1f
TM		 5428 msg.rpc_argp = &data->args;
5429 msg.rpc_resp = &data->res;
c970aa85 5430 task = rpc_run_task(&task_setup_data);
7a1218a2 5431 if (IS_ERR(task))
fe650407 5432 return PTR_ERR(task);
e6f81075
TM		 5433 if (!issync)
5434 goto out;
fe650407 5435 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5436 if (status != 0)
5437 goto out;
5438 status = data->rpc_status;
e144cbcc
TM		 5439 if (status == 0)
5440 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5441 else
5442 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5443out:
e6b3c4db 5444 rpc_put_task(task);
fe650407 5445 return status;
1da177e4
LT		 5446}
5447
e6f81075 5448int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5449{
5450 struct nfs_server *server = NFS_SERVER(inode);
5451 struct nfs4_exception exception = { };
5452 int err;
5453 do {
e6f81075 5454 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5455 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5456 switch (err) {
5457 case -NFS4ERR_STALE_STATEID:
5458 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5459 case 0:
5460 return 0;
5461 }
5462 err = nfs4_handle_exception(server, err, &exception);
5463 } while (exception.retry);
5464 return err;
5465}
5466
5467#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5468#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5469
5470/*
5471 * sleep, with exponential backoff, and retry the LOCK operation.
5472 */
5473static unsigned long
5474nfs4_set_lock_task_retry(unsigned long timeout)
5475{
416ad3c9 5476 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5477 timeout <<= 1;
5478 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5479 return NFS4_LOCK_MAXTIMEOUT;
5480 return timeout;
5481}
5482
1da177e4
LT		 5483static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5484{
5485 struct inode *inode = state->inode;
5486 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5487 struct nfs_client *clp = server->nfs_client;
911d1aaf 5488 struct nfs_lockt_args arg = {
1da177e4 5489 .fh = NFS_FH(inode),
911d1aaf 5490 .fl = request,
1da177e4 5491 };
911d1aaf
TM		 5492 struct nfs_lockt_res res = {
5493 .denied = request,
1da177e4
LT		 5494 };
5495 struct rpc_message msg = {
5496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5497 .rpc_argp = &arg,
5498 .rpc_resp = &res,
5499 .rpc_cred = state->owner->so_cred,
5500 };
1da177e4
LT		 5501 struct nfs4_lock_state *lsp;
5502 int status;
5503
911d1aaf 5504 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5505 status = nfs4_set_lock_state(state, request);
5506 if (status != 0)
5507 goto out;
5508 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5509 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5510 arg.lock_owner.s_dev = server->s_dev;
7c513058 5511 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5512 switch (status) {
5513 case 0:
5514 request->fl_type = F_UNLCK;
5515 break;
5516 case -NFS4ERR_DENIED:
5517 status = 0;
1da177e4 5518 }
70cc6487 5519 request->fl_ops->fl_release_private(request);
a6f951dd 5520 request->fl_ops = NULL;
8d0a8a9d 5521out:
1da177e4
LT		 5522 return status;
5523}
5524
5525static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5526{
5527 struct nfs4_exception exception = { };
5528 int err;
5529
5530 do {
d1b748a5
TM		 5531 err = _nfs4_proc_getlk(state, cmd, request);
5532 trace_nfs4_get_lock(request, state, cmd, err);
5533 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5534 &exception);
5535 } while (exception.retry);
5536 return err;
5537}
5538
83bfff23 5539static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5540{
5541 int res = 0;
5542 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5543 case FL_POSIX:
83bfff23 5544 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5545 break;
5546 case FL_FLOCK:
83bfff23 5547 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5548 break;
5549 default:
5550 BUG();
5551 }
1da177e4
LT		 5552 return res;
5553}
5554
faf5f49c 5555struct nfs4_unlockdata {
911d1aaf
TM		 5556 struct nfs_locku_args arg;
5557 struct nfs_locku_res res;
faf5f49c
TM		 5558 struct nfs4_lock_state *lsp;
5559 struct nfs_open_context *ctx;
911d1aaf
TM		 5560 struct file_lock fl;
5561 const struct nfs_server *server;
26e976a8 5562 unsigned long timestamp;
faf5f49c
TM		 5563};
5564
911d1aaf
TM		 5565static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5566 struct nfs_open_context *ctx,
5567 struct nfs4_lock_state *lsp,
5568 struct nfs_seqid *seqid)
5569{
5570 struct nfs4_unlockdata *p;
5571 struct inode *inode = lsp->ls_state->inode;
5572
8535b2be 5573 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5574 if (p == NULL)
5575 return NULL;
5576 p->arg.fh = NFS_FH(inode);
5577 p->arg.fl = &p->fl;
5578 p->arg.seqid = seqid;
c1d51931 5579 p->res.seqid = seqid;
911d1aaf
TM		 5580 p->lsp = lsp;
5581 atomic_inc(&lsp->ls_count);
5582 /* Ensure we don't close file until we're done freeing locks! */
5583 p->ctx = get_nfs_open_context(ctx);
5584 memcpy(&p->fl, fl, sizeof(p->fl));
5585 p->server = NFS_SERVER(inode);
5586 return p;
5587}
5588
06f814a3 5589static void nfs4_locku_release_calldata(void *data)
faf5f49c 5590{
963d8fe5 5591 struct nfs4_unlockdata *calldata = data;
911d1aaf 5592 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5593 nfs4_put_lock_state(calldata->lsp);
5594 put_nfs_open_context(calldata->ctx);
5595 kfree(calldata);
faf5f49c
TM		 5596}
5597
963d8fe5 5598static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5599{
963d8fe5 5600 struct nfs4_unlockdata *calldata = data;
faf5f49c 5601
14516c3a
TM		 5602 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5603 return;
faf5f49c
TM		 5604 switch (task->tk_status) {
5605 case 0:
26e976a8 5606 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5607 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5608 if (nfs4_update_lock_stateid(calldata->lsp,
5609 &calldata->res.stateid))
5610 break;
9e33bed5
TM		 5611 case -NFS4ERR_BAD_STATEID:
5612 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5613 case -NFS4ERR_STALE_STATEID:
5614 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5615 if (!nfs4_stateid_match(&calldata->arg.stateid,
5616 &calldata->lsp->ls_stateid))
5617 rpc_restart_call_prepare(task);
faf5f49c
TM		 5618 break;
5619 default:
8478eaa1
N		 5620 if (nfs4_async_handle_error(task, calldata->server,
5621 NULL, NULL) == -EAGAIN)
d00c5d43 5622 rpc_restart_call_prepare(task);
faf5f49c 5623 }
2b1bc308 5624 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5625}
5626
4ce70ada 5627static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5628{
4ce70ada 5629 struct nfs4_unlockdata *calldata = data;
faf5f49c 5630
911d1aaf 5631 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5632 goto out_wait;
425c1d4e 5633 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5634 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5635 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5636 goto out_no_action;
faf5f49c 5637 }
26e976a8 5638 calldata->timestamp = jiffies;
035168ab 5639 if (nfs4_setup_sequence(calldata->server,
a893693c 5640 &calldata->arg.seq_args,
2240a9e2
TM		 5641 &calldata->res.seq_res,
5642 task) != 0)
5643 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5644 return;
5645out_no_action:
5646 task->tk_action = NULL;
5647out_wait:
5648 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5649}
5650
963d8fe5 5651static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5652 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5653 .rpc_call_done = nfs4_locku_done,
06f814a3 5654 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5655};
5656
a5d16a4d
TM		 5657static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5658 struct nfs_open_context *ctx,
5659 struct nfs4_lock_state *lsp,
5660 struct nfs_seqid *seqid)
5661{
5662 struct nfs4_unlockdata *data;
5138fde0
TM		 5663 struct rpc_message msg = {
5664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5665 .rpc_cred = ctx->cred,
5666 };
c970aa85
TM		 5667 struct rpc_task_setup task_setup_data = {
5668 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5669 .rpc_message = &msg,
c970aa85 5670 .callback_ops = &nfs4_locku_ops,
101070ca 5671 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5672 .flags = RPC_TASK_ASYNC,
5673 };
a5d16a4d 5674
fa940720
WAA		 5675 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5676 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5677
137d6aca
FF		 5678 /* Ensure this is an unlock - when canceling a lock, the
5679 * canceled lock is passed in, and it won't be an unlock.
5680 */
5681 fl->fl_type = F_UNLCK;
5682
a5d16a4d
TM		 5683 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5684 if (data == NULL) {
5685 nfs_free_seqid(seqid);
5686 return ERR_PTR(-ENOMEM);
5687 }
5688
a9c92d6b 5689 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5690 msg.rpc_argp = &data->arg;
5691 msg.rpc_resp = &data->res;
c970aa85
TM		 5692 task_setup_data.callback_data = data;
5693 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5694}
5695
faf5f49c
TM		 5696static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5697{
65b62a29
TM		 5698 struct inode *inode = state->inode;
5699 struct nfs4_state_owner *sp = state->owner;
5700 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5701 struct nfs_seqid *seqid;
1da177e4 5702 struct nfs4_lock_state *lsp;
06f814a3 5703 struct rpc_task *task;
b4019c0e 5704 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5705 int status = 0;
536ff0f8 5706 unsigned char fl_flags = request->fl_flags;
faf5f49c 5707
8d0a8a9d 5708 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5709 /* Unlock _before_ we do the RPC call */
5710 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5711 /* Exclude nfs_delegation_claim_locks() */
5712 mutex_lock(&sp->so_delegreturn_mutex);
5713 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5714 down_read(&nfsi->rwsem);
83bfff23 5715 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5716 up_read(&nfsi->rwsem);
65b62a29 5717 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5718 goto out;
19e03c57
TM		 5719 }
5720 up_read(&nfsi->rwsem);
65b62a29 5721 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5722 if (status != 0)
9b073574
TM		 5723 goto out;
5724 /* Is this a delegated lock? */
8d0a8a9d 5725 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5726 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5727 goto out;
b4019c0e
TM		 5728 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5729 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5730 status = -ENOMEM;
badc76dd 5731 if (IS_ERR(seqid))
9b073574 5732 goto out;
cd3758e3 5733 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5734 status = PTR_ERR(task);
5735 if (IS_ERR(task))
9b073574 5736 goto out;
a5d16a4d 5737 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5738 rpc_put_task(task);
9b073574 5739out:
536ff0f8 5740 request->fl_flags = fl_flags;
d1b748a5 5741 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5742 return status;
5743}
5744
a5d16a4d
TM		 5745struct nfs4_lockdata {
5746 struct nfs_lock_args arg;
5747 struct nfs_lock_res res;
5748 struct nfs4_lock_state *lsp;
5749 struct nfs_open_context *ctx;
5750 struct file_lock fl;
26e976a8 5751 unsigned long timestamp;
a5d16a4d
TM		 5752 int rpc_status;
5753 int cancelled;
66179efe 5754 struct nfs_server *server;
a5d16a4d
TM		 5755};
5756
5757static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5758 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5759 gfp_t gfp_mask)
1da177e4 5760{
a5d16a4d
TM		 5761 struct nfs4_lockdata *p;
5762 struct inode *inode = lsp->ls_state->inode;
1da177e4 5763 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5764 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5765
8535b2be 5766 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5767 if (p == NULL)
5768 return NULL;
5769
5770 p->arg.fh = NFS_FH(inode);
5771 p->arg.fl = &p->fl;
8535b2be 5772 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5773 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5774 goto out_free;
b4019c0e
TM		 5775 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5776 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5777 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5778 goto out_free_seqid;
7539bbab 5779 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5780 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5781 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5782 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5783 p->lsp = lsp;
66179efe 5784 p->server = server;
a5d16a4d
TM		 5785 atomic_inc(&lsp->ls_count);
5786 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5787 get_file(fl->fl_file);
a5d16a4d
TM		 5788 memcpy(&p->fl, fl, sizeof(p->fl));
5789 return p;
2f74c0a0
TM		 5790out_free_seqid:
5791 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5792out_free:
5793 kfree(p);
5794 return NULL;
5795}
5796
5797static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5798{
5799 struct nfs4_lockdata *data = calldata;
5800 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5801
3110ff80 5802 dprintk("%s: begin!\n", __func__);
2f74c0a0 5803 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5804 goto out_wait;
a5d16a4d 5805 /* Do we need to do an open_to_lock_owner? */
6b447539 5806 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5807 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5808 goto out_release_lock_seqid;
8fe72bac 5809 }
425c1d4e
TM		 5810 nfs4_stateid_copy(&data->arg.open_stateid,
5811 &state->open_stateid);
a5d16a4d 5812 data->arg.new_lock_owner = 1;
c1d51931 5813 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5814 } else {
2f74c0a0 5815 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5816 nfs4_stateid_copy(&data->arg.lock_stateid,
5817 &data->lsp->ls_stateid);
5818 }
5d422301
TM		 5819 if (!nfs4_valid_open_stateid(state)) {
5820 data->rpc_status = -EBADF;
5821 task->tk_action = NULL;
5822 goto out_release_open_seqid;
5823 }
26e976a8 5824 data->timestamp = jiffies;
035168ab
TM		 5825 if (nfs4_setup_sequence(data->server,
5826 &data->arg.seq_args,
2240a9e2 5827 &data->res.seq_res,
d9afbd1b 5828 task) == 0)
66179efe 5829 return;
5d422301 5830out_release_open_seqid:
2240a9e2
TM		 5831 nfs_release_seqid(data->arg.open_seqid);
5832out_release_lock_seqid:
5833 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5834out_wait:
5835 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5836 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5837}
5838
a5d16a4d
TM		 5839static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5840{
5841 struct nfs4_lockdata *data = calldata;
39071e6f 5842 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5843
3110ff80 5844 dprintk("%s: begin!\n", __func__);
a5d16a4d 5845
14516c3a
TM		 5846 if (!nfs4_sequence_done(task, &data->res.seq_res))
5847 return;
66179efe 5848
a5d16a4d 5849 data->rpc_status = task->tk_status;
425c1d4e
TM		 5850 switch (task->tk_status) {
5851 case 0:
2b0143b5 5852 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5853 data->timestamp);
c69899a1
TM		 5854 if (data->arg.new_lock) {
5855 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5856 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5857 rpc_restart_call_prepare(task);
5858 break;
5859 }
5860 }
39071e6f
TM		 5861 if (data->arg.new_lock_owner != 0) {
5862 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5863 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5864 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5865 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5866 rpc_restart_call_prepare(task);
425c1d4e
TM		 5867 break;
5868 case -NFS4ERR_BAD_STATEID:
5869 case -NFS4ERR_OLD_STATEID:
5870 case -NFS4ERR_STALE_STATEID:
5871 case -NFS4ERR_EXPIRED:
5872 if (data->arg.new_lock_owner != 0) {
5873 if (!nfs4_stateid_match(&data->arg.open_stateid,
5874 &lsp->ls_state->open_stateid))
5875 rpc_restart_call_prepare(task);
5876 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5877 &lsp->ls_stateid))
5878 rpc_restart_call_prepare(task);
a5d16a4d 5879 }
3110ff80 5880 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5881}
5882
5883static void nfs4_lock_release(void *calldata)
5884{
5885 struct nfs4_lockdata *data = calldata;
5886
3110ff80 5887 dprintk("%s: begin!\n", __func__);
2f74c0a0 5888 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5889 if (data->cancelled != 0) {
5890 struct rpc_task *task;
5891 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5892 data->arg.lock_seqid);
5893 if (!IS_ERR(task))
bf294b41 5894 rpc_put_task_async(task);
3110ff80 5895 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5896 } else
5897 nfs_free_seqid(data->arg.lock_seqid);
5898 nfs4_put_lock_state(data->lsp);
5899 put_nfs_open_context(data->ctx);
feaff8e5 5900 fput(data->fl.fl_file);
a5d16a4d 5901 kfree(data);
3110ff80 5902 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5903}
5904
5905static const struct rpc_call_ops nfs4_lock_ops = {
5906 .rpc_call_prepare = nfs4_lock_prepare,
5907 .rpc_call_done = nfs4_lock_done,
5908 .rpc_release = nfs4_lock_release,
5909};
5910
2bee72a6
TM		 5911static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5912{
2bee72a6
TM		 5913 switch (error) {
5914 case -NFS4ERR_ADMIN_REVOKED:
5915 case -NFS4ERR_BAD_STATEID:
ecac799a 5916 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5917 if (new_lock_owner != 0 ||
795a88c9 5918 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5919 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5920 break;
5921 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5922 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5923 case -NFS4ERR_EXPIRED:
5924 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5925 };
5926}
5927
afe6c27c 5928static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5929{
5930 struct nfs4_lockdata *data;
5931 struct rpc_task *task;
5138fde0
TM		 5932 struct rpc_message msg = {
5933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5934 .rpc_cred = state->owner->so_cred,
5935 };
c970aa85
TM		 5936 struct rpc_task_setup task_setup_data = {
5937 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5938 .rpc_message = &msg,
c970aa85 5939 .callback_ops = &nfs4_lock_ops,
101070ca 5940 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5941 .flags = RPC_TASK_ASYNC,
5942 };
a5d16a4d
TM		 5943 int ret;
5944
3110ff80 5945 dprintk("%s: begin!\n", __func__);
cd3758e3 5946 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5947 fl->fl_u.nfs4_fl.owner,
5948 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5949 if (data == NULL)
5950 return -ENOMEM;
5951 if (IS_SETLKW(cmd))
5952 data->arg.block = 1;
a9c92d6b 5953 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5954 msg.rpc_argp = &data->arg;
5955 msg.rpc_resp = &data->res;
c970aa85 5956 task_setup_data.callback_data = data;
8fe72bac
TM		 5957 if (recovery_type > NFS_LOCK_NEW) {
5958 if (recovery_type == NFS_LOCK_RECLAIM)
5959 data->arg.reclaim = NFS_LOCK_RECLAIM;
5960 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5961 } else
5962 data->arg.new_lock = 1;
c970aa85 5963 task = rpc_run_task(&task_setup_data);
7a1218a2 5964 if (IS_ERR(task))
a5d16a4d 5965 return PTR_ERR(task);
a5d16a4d
TM		 5966 ret = nfs4_wait_for_completion_rpc_task(task);
5967 if (ret == 0) {
5968 ret = data->rpc_status;
2bee72a6
TM		 5969 if (ret)
5970 nfs4_handle_setlk_error(data->server, data->lsp,
5971 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5972 } else
5973 data->cancelled = 1;
e6b3c4db 5974 rpc_put_task(task);
3110ff80 5975 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5976 return ret;
1da177e4
LT		 5977}
5978
5979static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5980{
202b50dc 5981 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5982 struct nfs4_exception exception = {
5983 .inode = state->inode,
5984 };
202b50dc
TM		 5985 int err;
5986
5987 do {
42a2d13e
TM		 5988 /* Cache the lock if possible... */
5989 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5990 return 0;
afe6c27c 5991 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5992 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5993 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5994 break;
5995 nfs4_handle_exception(server, err, &exception);
5996 } while (exception.retry);
5997 return err;
1da177e4
LT		 5998}
5999
6000static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6001{
202b50dc 6002 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6003 struct nfs4_exception exception = {
6004 .inode = state->inode,
6005 };
202b50dc
TM		 6006 int err;
6007
6bfc93ef
TM		 6008 err = nfs4_set_lock_state(state, request);
6009 if (err != 0)
6010 return err;
f6de7a39 6011 if (!recover_lost_locks) {
ef1820f9
N		 6012 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6013 return 0;
6014 }
202b50dc 6015 do {
42a2d13e
TM		 6016 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6017 return 0;
afe6c27c 6018 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 6019 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 6020 switch (err) {
6021 default:
6022 goto out;
6023 case -NFS4ERR_GRACE:
6024 case -NFS4ERR_DELAY:
6025 nfs4_handle_exception(server, err, &exception);
6026 err = 0;
6027 }
202b50dc 6028 } while (exception.retry);
a9ed2e25 6029out:
202b50dc 6030 return err;
1da177e4
LT		 6031}
6032
f062eb6c 6033#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6034/**
6035 * nfs41_check_expired_locks - possibly free a lock stateid
6036 *
6037 * @state: NFSv4 state for an inode
6038 *
6039 * Returns NFS_OK if recovery for this stateid is now finished.
6040 * Otherwise a negative NFS4ERR value is returned.
6041 */
b01dd1d8 6042static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6043{
eb64cf96 6044 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6045 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6046 struct nfs_server *server = NFS_SERVER(state->inode);
6047
b01dd1d8 6048 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6049 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6050 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6051
6052 status = nfs41_test_stateid(server,
6053 &lsp->ls_stateid,
6054 cred);
08cb47fa 6055 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6056 if (status != NFS_OK) {
3e60ffdd
CL		 6057 /* Free the stateid unless the server
6058 * informs us the stateid is unrecognized. */
89af2739
CL		 6059 if (status != -NFS4ERR_BAD_STATEID)
6060 nfs41_free_stateid(server,
ab7cb0df
TM		 6061 &lsp->ls_stateid,
6062 cred);
795a88c9 6063 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6064 ret = status;
6065 }
6066 }
6067 };
6068
6069 return ret;
6070}
6071
6072static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6073{
6074 int status = NFS_OK;
6075
6076 if (test_bit(LK_STATE_IN_USE, &state->flags))
6077 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6078 if (status != NFS_OK)
6079 status = nfs4_lock_expired(state, request);
6080 return status;
f062eb6c
BS		 6081}
6082#endif
6083
1da177e4
LT		 6084static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6085{
19e03c57 6086 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6087 unsigned char fl_flags = request->fl_flags;
8e469ebd 6088 int status = -ENOLCK;
1da177e4 6089
8e469ebd
TM		 6090 if ((fl_flags & FL_POSIX) &&
6091 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6092 goto out;
6bfc93ef 6093 /* Is this a delegated open? */
6bfc93ef
TM		 6094 status = nfs4_set_lock_state(state, request);
6095 if (status != 0)
6096 goto out;
01c3b861 6097 request->fl_flags |= FL_ACCESS;
83bfff23 6098 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6099 if (status < 0)
6100 goto out;
19e03c57 6101 down_read(&nfsi->rwsem);
01c3b861 6102 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6103 /* Yes: cache locks! */
01c3b861 6104 /* ...but avoid races with delegation recall... */
19e03c57 6105 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6106 status = do_vfs_lock(state->inode, request);
c69899a1 6107 up_read(&nfsi->rwsem);
9a99af49 6108 goto out;
9a99af49 6109 }
19e03c57 6110 up_read(&nfsi->rwsem);
c69899a1 6111 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6112out:
6113 request->fl_flags = fl_flags;
1da177e4
LT		 6114 return status;
6115}
6116
6117static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6118{
a1d0b5ee
TM		 6119 struct nfs4_exception exception = {
6120 .state = state,
05ffe24f 6121 .inode = state->inode,
a1d0b5ee 6122 };
1da177e4
LT		 6123 int err;
6124
6125 do {
965b5d67 6126 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6127 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6128 if (err == -NFS4ERR_DENIED)
6129 err = -EAGAIN;
1da177e4 6130 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6131 err, &exception);
1da177e4
LT		 6132 } while (exception.retry);
6133 return err;
6134}
6135
6136static int
6137nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6138{
6139 struct nfs_open_context *ctx;
6140 struct nfs4_state *state;
6141 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6142 int status;
6143
6144 /* verify open state */
cd3758e3 6145 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6146 state = ctx->state;
6147
6148 if (request->fl_start < 0 || request->fl_end < 0)
6149 return -EINVAL;
6150
d953126a
TM		 6151 if (IS_GETLK(cmd)) {
6152 if (state != NULL)
6153 return nfs4_proc_getlk(state, F_GETLK, request);
6154 return 0;
6155 }
1da177e4
LT		 6156
6157 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6158 return -EINVAL;
6159
d953126a
TM		 6160 if (request->fl_type == F_UNLCK) {
6161 if (state != NULL)
6162 return nfs4_proc_unlck(state, cmd, request);
6163 return 0;
6164 }
1da177e4 6165
d953126a
TM		 6166 if (state == NULL)
6167 return -ENOLCK;
55725513
TM		 6168 /*
6169 * Don't rely on the VFS having checked the file open mode,
6170 * since it won't do this for flock() locks.
6171 */
f44106e2 6172 switch (request->fl_type) {
55725513
TM		 6173 case F_RDLCK:
6174 if (!(filp->f_mode & FMODE_READ))
6175 return -EBADF;
6176 break;
6177 case F_WRLCK:
6178 if (!(filp->f_mode & FMODE_WRITE))
6179 return -EBADF;
6180 }
6181
1da177e4
LT		 6182 do {
6183 status = nfs4_proc_setlk(state, cmd, request);
6184 if ((status != -EAGAIN) || IS_SETLK(cmd))
6185 break;
6186 timeout = nfs4_set_lock_task_retry(timeout);
6187 status = -ERESTARTSYS;
6188 if (signalled())
6189 break;
6190 } while(status < 0);
1da177e4
LT		 6191 return status;
6192}
6193
db4f2e63 6194int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6195{
6196 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6197 int err;
6198
6199 err = nfs4_set_lock_state(state, fl);
6200 if (err != 0)
db4f2e63 6201 return err;
4a706fa0 6202 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6203 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6204}
6b3b5496 6205
cf470c3e
TM		 6206struct nfs_release_lockowner_data {
6207 struct nfs4_lock_state *lsp;
5ae67c4f 6208 struct nfs_server *server;
cf470c3e 6209 struct nfs_release_lockowner_args args;
b7e63a10 6210 struct nfs_release_lockowner_res res;
60ea6812 6211 unsigned long timestamp;
cf470c3e
TM		 6212};
6213
fbd4bfd1
CL		 6214static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6215{
6216 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6217 struct nfs_server *server = data->server;
cb04ad2a
PT		 6218 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6219 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6220 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6221 data->timestamp = jiffies;
fbd4bfd1
CL		 6222}
6223
6224static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6225{
6226 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6227 struct nfs_server *server = data->server;
6228
b7e63a10 6229 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6230
6231 switch (task->tk_status) {
6232 case 0:
6233 renew_lease(server, data->timestamp);
6234 break;
6235 case -NFS4ERR_STALE_CLIENTID:
6236 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6237 nfs4_schedule_lease_recovery(server->nfs_client);
6238 break;
60ea6812
CL		 6239 case -NFS4ERR_LEASE_MOVED:
6240 case -NFS4ERR_DELAY:
8478eaa1
N		 6241 if (nfs4_async_handle_error(task, server,
6242 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6243 rpc_restart_call_prepare(task);
6244 }
fbd4bfd1
CL		 6245}
6246
d3c7b7cc
TM		 6247static void nfs4_release_lockowner_release(void *calldata)
6248{
cf470c3e 6249 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6250 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6251 kfree(calldata);
6252}
6253
17280175 6254static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6255 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6256 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6257 .rpc_release = nfs4_release_lockowner_release,
6258};
6259
f1cdae87
JL		 6260static void
6261nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6262{
cf470c3e 6263 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6264 struct rpc_message msg = {
6265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6266 };
6267
6268 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6269 return;
fbd4bfd1 6270
cf470c3e
TM		 6271 data = kmalloc(sizeof(*data), GFP_NOFS);
6272 if (!data)
f1cdae87 6273 return;
cf470c3e 6274 data->lsp = lsp;
5ae67c4f 6275 data->server = server;
cf470c3e
TM		 6276 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6277 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6278 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6279
cf470c3e 6280 msg.rpc_argp = &data->args;
b7e63a10
TM		 6281 msg.rpc_resp = &data->res;
6282 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6283 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6284}
6285
aa1870af
BF		 6286#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6287
64c2ce8b
AK		 6288static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6289 const void *buf, size_t buflen,
6290 int flags, int type)
6b3b5496 6291{
64c2ce8b
AK		 6292 if (strcmp(key, "") != 0)
6293 return -EINVAL;
4b580ee3 6294
2b0143b5 6295 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6296}
6297
64c2ce8b
AK		 6298static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6299 void *buf, size_t buflen, int type)
6b3b5496 6300{
64c2ce8b
AK		 6301 if (strcmp(key, "") != 0)
6302 return -EINVAL;
aa1870af 6303
2b0143b5 6304 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6305}
6306
64c2ce8b
AK		 6307static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6308 size_t list_len, const char *name,
6309 size_t name_len, int type)
6b3b5496 6310{
64c2ce8b 6311 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6312
2b0143b5 6313 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6314 return 0;
64c2ce8b
AK		 6315
6316 if (list && len <= list_len)
6317 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6318 return len;
6b3b5496
BF		 6319}
6320
c9bccef6
DQ		 6321#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6322static inline int nfs4_server_supports_labels(struct nfs_server *server)
6323{
6324 return server->caps & NFS_CAP_SECURITY_LABEL;
6325}
6326
6327static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6328 const void *buf, size_t buflen,
6329 int flags, int type)
6330{
6331 if (security_ismaclabel(key))
6332 return nfs4_set_security_label(dentry, buf, buflen);
6333
6334 return -EOPNOTSUPP;
6335}
6336
6337static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6338 void *buf, size_t buflen, int type)
6339{
6340 if (security_ismaclabel(key))
2b0143b5 6341 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6342 return -EOPNOTSUPP;
6343}
6344
6345static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6346 size_t list_len, const char *name,
6347 size_t name_len, int type)
6348{
6349 size_t len = 0;
6350
2b0143b5
DH		 6351 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6352 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6353 if (list && len <= list_len)
2b0143b5 6354 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6355 }
6356 return len;
6357}
6358
6359static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6360 .prefix = XATTR_SECURITY_PREFIX,
6361 .list = nfs4_xattr_list_nfs4_label,
6362 .get = nfs4_xattr_get_nfs4_label,
6363 .set = nfs4_xattr_set_nfs4_label,
6364};
6365#endif
6366
6367
533eb461
AA		 6368/*
6369 * nfs_fhget will use either the mounted_on_fileid or the fileid
6370 */
69aaaae1
TM		 6371static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6372{
533eb461
AA		 6373 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6374 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6375 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6376 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6377 return;
6378
6379 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6380 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6381 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6382 fattr->nlink = 2;
6383}
6384
f05d147f
BS		 6385static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6386 const struct qstr *name,
6387 struct nfs4_fs_locations *fs_locations,
6388 struct page *page)
683b57b4
TM		 6389{
6390 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6391 u32 bitmask[3] = {
361e624f 6392 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6393 };
6394 struct nfs4_fs_locations_arg args = {
6395 .dir_fh = NFS_FH(dir),
c228fd3a 6396 .name = name,
683b57b4
TM		 6397 .page = page,
6398 .bitmask = bitmask,
6399 };
22958463
BH		 6400 struct nfs4_fs_locations_res res = {
6401 .fs_locations = fs_locations,
6402 };
683b57b4
TM		 6403 struct rpc_message msg = {
6404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6405 .rpc_argp = &args,
22958463 6406 .rpc_resp = &res,
683b57b4
TM		 6407 };
6408 int status;
6409
3110ff80 6410 dprintk("%s: start\n", __func__);
533eb461
AA		 6411
6412 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6413 * is not supported */
6414 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6415 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6416 else
6417 bitmask[0] |= FATTR4_WORD0_FILEID;
6418
c228fd3a 6419 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6420 fs_locations->server = server;
830b8e33 6421 fs_locations->nlocations = 0;
f05d147f 6422 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6423 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6424 return status;
6425}
6426
f05d147f
BS		 6427int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6428 const struct qstr *name,
6429 struct nfs4_fs_locations *fs_locations,
6430 struct page *page)
db0a9593
BS		 6431{
6432 struct nfs4_exception exception = { };
6433 int err;
6434 do {
078ea3df
TM		 6435 err = _nfs4_proc_fs_locations(client, dir, name,
6436 fs_locations, page);
6437 trace_nfs4_get_fs_locations(dir, name, err);
6438 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6439 &exception);
6440 } while (exception.retry);
6441 return err;
6442}
6443
b03d735b
CL		 6444/*
6445 * This operation also signals the server that this client is
6446 * performing migration recovery. The server can stop returning
6447 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6448 * appended to this compound to identify the client ID which is
6449 * performing recovery.
6450 */
6451static int _nfs40_proc_get_locations(struct inode *inode,
6452 struct nfs4_fs_locations *locations,
6453 struct page *page, struct rpc_cred *cred)
6454{
6455 struct nfs_server *server = NFS_SERVER(inode);
6456 struct rpc_clnt *clnt = server->client;
6457 u32 bitmask[2] = {
6458 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6459 };
6460 struct nfs4_fs_locations_arg args = {
6461 .clientid = server->nfs_client->cl_clientid,
6462 .fh = NFS_FH(inode),
6463 .page = page,
6464 .bitmask = bitmask,
6465 .migration = 1, /* skip LOOKUP */
6466 .renew = 1, /* append RENEW */
6467 };
6468 struct nfs4_fs_locations_res res = {
6469 .fs_locations = locations,
6470 .migration = 1,
6471 .renew = 1,
6472 };
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6475 .rpc_argp = &args,
6476 .rpc_resp = &res,
6477 .rpc_cred = cred,
6478 };
6479 unsigned long now = jiffies;
6480 int status;
6481
6482 nfs_fattr_init(&locations->fattr);
6483 locations->server = server;
6484 locations->nlocations = 0;
6485
6486 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6487 nfs4_set_sequence_privileged(&args.seq_args);
6488 status = nfs4_call_sync_sequence(clnt, server, &msg,
6489 &args.seq_args, &res.seq_res);
6490 if (status)
6491 return status;
6492
6493 renew_lease(server, now);
6494 return 0;
6495}
6496
6497#ifdef CONFIG_NFS_V4_1
6498
6499/*
6500 * This operation also signals the server that this client is
6501 * performing migration recovery. The server can stop asserting
6502 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6503 * performing this operation is identified in the SEQUENCE
6504 * operation in this compound.
6505 *
6506 * When the client supports GETATTR(fs_locations_info), it can
6507 * be plumbed in here.
6508 */
6509static int _nfs41_proc_get_locations(struct inode *inode,
6510 struct nfs4_fs_locations *locations,
6511 struct page *page, struct rpc_cred *cred)
6512{
6513 struct nfs_server *server = NFS_SERVER(inode);
6514 struct rpc_clnt *clnt = server->client;
6515 u32 bitmask[2] = {
6516 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6517 };
6518 struct nfs4_fs_locations_arg args = {
6519 .fh = NFS_FH(inode),
6520 .page = page,
6521 .bitmask = bitmask,
6522 .migration = 1, /* skip LOOKUP */
6523 };
6524 struct nfs4_fs_locations_res res = {
6525 .fs_locations = locations,
6526 .migration = 1,
6527 };
6528 struct rpc_message msg = {
6529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6530 .rpc_argp = &args,
6531 .rpc_resp = &res,
6532 .rpc_cred = cred,
6533 };
6534 int status;
6535
6536 nfs_fattr_init(&locations->fattr);
6537 locations->server = server;
6538 locations->nlocations = 0;
6539
6540 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6541 nfs4_set_sequence_privileged(&args.seq_args);
6542 status = nfs4_call_sync_sequence(clnt, server, &msg,
6543 &args.seq_args, &res.seq_res);
6544 if (status == NFS4_OK &&
6545 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6546 status = -NFS4ERR_LEASE_MOVED;
6547 return status;
6548}
6549
6550#endif /* CONFIG_NFS_V4_1 */
6551
6552/**
6553 * nfs4_proc_get_locations - discover locations for a migrated FSID
6554 * @inode: inode on FSID that is migrating
6555 * @locations: result of query
6556 * @page: buffer
6557 * @cred: credential to use for this operation
6558 *
6559 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6560 * operation failed, or a negative errno if a local error occurred.
6561 *
6562 * On success, "locations" is filled in, but if the server has
6563 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6564 * asserted.
6565 *
6566 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6567 * from this client that require migration recovery.
6568 */
6569int nfs4_proc_get_locations(struct inode *inode,
6570 struct nfs4_fs_locations *locations,
6571 struct page *page, struct rpc_cred *cred)
6572{
6573 struct nfs_server *server = NFS_SERVER(inode);
6574 struct nfs_client *clp = server->nfs_client;
6575 const struct nfs4_mig_recovery_ops *ops =
6576 clp->cl_mvops->mig_recovery_ops;
6577 struct nfs4_exception exception = { };
6578 int status;
6579
6580 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6581 (unsigned long long)server->fsid.major,
6582 (unsigned long long)server->fsid.minor,
6583 clp->cl_hostname);
6584 nfs_display_fhandle(NFS_FH(inode), __func__);
6585
6586 do {
6587 status = ops->get_locations(inode, locations, page, cred);
6588 if (status != -NFS4ERR_DELAY)
6589 break;
6590 nfs4_handle_exception(server, status, &exception);
6591 } while (exception.retry);
6592 return status;
6593}
6594
44c99933
CL		 6595/*
6596 * This operation also signals the server that this client is
6597 * performing "lease moved" recovery. The server can stop
6598 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6599 * is appended to this compound to identify the client ID which is
6600 * performing recovery.
6601 */
6602static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6603{
6604 struct nfs_server *server = NFS_SERVER(inode);
6605 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6606 struct rpc_clnt *clnt = server->client;
6607 struct nfs4_fsid_present_arg args = {
6608 .fh = NFS_FH(inode),
6609 .clientid = clp->cl_clientid,
6610 .renew = 1, /* append RENEW */
6611 };
6612 struct nfs4_fsid_present_res res = {
6613 .renew = 1,
6614 };
6615 struct rpc_message msg = {
6616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6617 .rpc_argp = &args,
6618 .rpc_resp = &res,
6619 .rpc_cred = cred,
6620 };
6621 unsigned long now = jiffies;
6622 int status;
6623
6624 res.fh = nfs_alloc_fhandle();
6625 if (res.fh == NULL)
6626 return -ENOMEM;
6627
6628 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6629 nfs4_set_sequence_privileged(&args.seq_args);
6630 status = nfs4_call_sync_sequence(clnt, server, &msg,
6631 &args.seq_args, &res.seq_res);
6632 nfs_free_fhandle(res.fh);
6633 if (status)
6634 return status;
6635
6636 do_renew_lease(clp, now);
6637 return 0;
6638}
6639
6640#ifdef CONFIG_NFS_V4_1
6641
6642/*
6643 * This operation also signals the server that this client is
6644 * performing "lease moved" recovery. The server can stop asserting
6645 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6646 * this operation is identified in the SEQUENCE operation in this
6647 * compound.
6648 */
6649static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6650{
6651 struct nfs_server *server = NFS_SERVER(inode);
6652 struct rpc_clnt *clnt = server->client;
6653 struct nfs4_fsid_present_arg args = {
6654 .fh = NFS_FH(inode),
6655 };
6656 struct nfs4_fsid_present_res res = {
6657 };
6658 struct rpc_message msg = {
6659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6660 .rpc_argp = &args,
6661 .rpc_resp = &res,
6662 .rpc_cred = cred,
6663 };
6664 int status;
6665
6666 res.fh = nfs_alloc_fhandle();
6667 if (res.fh == NULL)
6668 return -ENOMEM;
6669
6670 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6671 nfs4_set_sequence_privileged(&args.seq_args);
6672 status = nfs4_call_sync_sequence(clnt, server, &msg,
6673 &args.seq_args, &res.seq_res);
6674 nfs_free_fhandle(res.fh);
6675 if (status == NFS4_OK &&
6676 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6677 status = -NFS4ERR_LEASE_MOVED;
6678 return status;
6679}
6680
6681#endif /* CONFIG_NFS_V4_1 */
6682
6683/**
6684 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6685 * @inode: inode on FSID to check
6686 * @cred: credential to use for this operation
6687 *
6688 * Server indicates whether the FSID is present, moved, or not
6689 * recognized. This operation is necessary to clear a LEASE_MOVED
6690 * condition for this client ID.
6691 *
6692 * Returns NFS4_OK if the FSID is present on this server,
6693 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6694 * NFS4ERR code if some error occurred on the server, or a
6695 * negative errno if a local failure occurred.
6696 */
6697int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6698{
6699 struct nfs_server *server = NFS_SERVER(inode);
6700 struct nfs_client *clp = server->nfs_client;
6701 const struct nfs4_mig_recovery_ops *ops =
6702 clp->cl_mvops->mig_recovery_ops;
6703 struct nfs4_exception exception = { };
6704 int status;
6705
6706 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6707 (unsigned long long)server->fsid.major,
6708 (unsigned long long)server->fsid.minor,
6709 clp->cl_hostname);
6710 nfs_display_fhandle(NFS_FH(inode), __func__);
6711
6712 do {
6713 status = ops->fsid_present(inode, cred);
6714 if (status != -NFS4ERR_DELAY)
6715 break;
6716 nfs4_handle_exception(server, status, &exception);
6717 } while (exception.retry);
6718 return status;
6719}
6720
5ec16a85 6721/**
a5250def
WAA		 6722 * If 'use_integrity' is true and the state managment nfs_client
6723 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6724 * and the machine credential as per RFC3530bis and RFC5661 Security
6725 * Considerations sections. Otherwise, just use the user cred with the
6726 * filesystem's rpc_client.
5ec16a85 6727 */
a5250def 6728static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6729{
6730 int status;
6731 struct nfs4_secinfo_arg args = {
6732 .dir_fh = NFS_FH(dir),
6733 .name = name,
6734 };
6735 struct nfs4_secinfo_res res = {
6736 .flavors = flavors,
6737 };
6738 struct rpc_message msg = {
6739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6740 .rpc_argp = &args,
6741 .rpc_resp = &res,
6742 };
a5250def 6743 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6744 struct rpc_cred *cred = NULL;
a5250def
WAA		 6745
6746 if (use_integrity) {
6747 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6748 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6749 msg.rpc_cred = cred;
a5250def 6750 }
5a5ea0d4
BS		 6751
6752 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6753
6754 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6755 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6756
a5250def
WAA		 6757 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6758 &res.seq_res, 0);
5a5ea0d4 6759 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6760
7cb852df
WAA		 6761 if (cred)
6762 put_rpccred(cred);
a5250def 6763
5a5ea0d4
BS		 6764 return status;
6765}
6766
72de53ec
BS		 6767int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6768 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6769{
6770 struct nfs4_exception exception = { };
6771 int err;
6772 do {
a5250def
WAA		 6773 err = -NFS4ERR_WRONGSEC;
6774
6775 /* try to use integrity protection with machine cred */
6776 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6777 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6778
6779 /*
6780 * if unable to use integrity protection, or SECINFO with
6781 * integrity protection returns NFS4ERR_WRONGSEC (which is
6782 * disallowed by spec, but exists in deployed servers) use
6783 * the current filesystem's rpc_client and the user cred.
6784 */
6785 if (err == -NFS4ERR_WRONGSEC)
6786 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6787
078ea3df
TM		 6788 trace_nfs4_secinfo(dir, name, err);
6789 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6790 &exception);
6791 } while (exception.retry);
6792 return err;
6793}
6794
557134a3 6795#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6796/*
6797 * Check the exchange flags returned by the server for invalid flags, having
6798 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6799 * DS flags set.
6800 */
6801static int nfs4_check_cl_exchange_flags(u32 flags)
6802{
6803 if (flags & ~EXCHGID4_FLAG_MASK_R)
6804 goto out_inval;
6805 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6806 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6807 goto out_inval;
6808 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6809 goto out_inval;
6810 return NFS_OK;
6811out_inval:
6812 return -NFS4ERR_INVAL;
6813}
6814
78fe0f41 6815static bool
79d4e1f0
CL		 6816nfs41_same_server_scope(struct nfs41_server_scope *a,
6817 struct nfs41_server_scope *b)
78fe0f41
WAA		 6818{
6819 if (a->server_scope_sz == b->server_scope_sz &&
6820 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6821 return true;
6822
6823 return false;
6824}
6825
7c44f1ae
WAA		 6826/*
6827 * nfs4_proc_bind_conn_to_session()
6828 *
6829 * The 4.1 client currently uses the same TCP connection for the
6830 * fore and backchannel.
6831 */
2cf047c9 6832int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6833{
6834 int status;
71a097c6
TM		 6835 struct nfs41_bind_conn_to_session_args args = {
6836 .client = clp,
6837 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6838 };
7c44f1ae
WAA		 6839 struct nfs41_bind_conn_to_session_res res;
6840 struct rpc_message msg = {
6841 .rpc_proc =
6842 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6843 .rpc_argp = &args,
7c44f1ae 6844 .rpc_resp = &res,
2cf047c9 6845 .rpc_cred = cred,
7c44f1ae
WAA		 6846 };
6847
6848 dprintk("--> %s\n", __func__);
7c44f1ae 6849
71a097c6
TM		 6850 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6851 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6852 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6853
6854 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6855 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6856 if (status == 0) {
71a097c6 6857 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6858 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6859 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6860 status = -EIO;
71a097c6 6861 goto out;
7c44f1ae 6862 }
71a097c6 6863 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6864 dprintk("NFS: %s: Unexpected direction from server\n",
6865 __func__);
6866 status = -EIO;
71a097c6 6867 goto out;
7c44f1ae 6868 }
71a097c6 6869 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6870 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6871 __func__);
6872 status = -EIO;
71a097c6 6873 goto out;
7c44f1ae
WAA		 6874 }
6875 }
7c44f1ae
WAA		 6876out:
6877 dprintk("<-- %s status= %d\n", __func__, status);
6878 return status;
6879}
6880
99fe60d0 6881/*
fa940720
WAA		 6882 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6883 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6884 */
6885static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6886 .how = SP4_MACH_CRED,
6887 .enforce.u.words = {
6888 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6889 1 << (OP_EXCHANGE_ID - 32) |
6890 1 << (OP_CREATE_SESSION - 32) |
6891 1 << (OP_DESTROY_SESSION - 32) |
6892 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6893 },
6894 .allow.u.words = {
6895 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6896 1 << (OP_LOCKU) |
6897 1 << (OP_COMMIT),
8b5bee2e 6898 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6899 1 << (OP_SECINFO_NO_NAME - 32) |
6900 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6901 1 << (OP_FREE_STATEID - 32) |
6902 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6903 }
6904};
6905
6906/*
6907 * Select the state protection mode for client `clp' given the server results
6908 * from exchange_id in `sp'.
99fe60d0 6909 *
2031cd1a
WAA		 6910 * Returns 0 on success, negative errno otherwise.
6911 */
6912static int nfs4_sp4_select_mode(struct nfs_client *clp,
6913 struct nfs41_state_protection *sp)
6914{
6915 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6916 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6917 1 << (OP_EXCHANGE_ID - 32) |
6918 1 << (OP_CREATE_SESSION - 32) |
6919 1 << (OP_DESTROY_SESSION - 32) |
6920 1 << (OP_DESTROY_CLIENTID - 32)
6921 };
6922 unsigned int i;
6923
6924 if (sp->how == SP4_MACH_CRED) {
6925 /* Print state protect result */
6926 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6927 for (i = 0; i <= LAST_NFS4_OP; i++) {
6928 if (test_bit(i, sp->enforce.u.longs))
6929 dfprintk(MOUNT, " enforce op %d\n", i);
6930 if (test_bit(i, sp->allow.u.longs))
6931 dfprintk(MOUNT, " allow op %d\n", i);
6932 }
6933
6934 /* make sure nothing is on enforce list that isn't supported */
6935 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6936 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6937 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6938 return -EINVAL;
6939 }
6940 }
6941
6942 /*
6943 * Minimal mode - state operations are allowed to use machine
6944 * credential. Note this already happens by default, so the
6945 * client doesn't have to do anything more than the negotiation.
6946 *
6947 * NOTE: we don't care if EXCHANGE_ID is in the list -
6948 * we're already using the machine cred for exchange_id
6949 * and will never use a different cred.
6950 */
6951 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6952 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6953 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6954 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6955 dfprintk(MOUNT, "sp4_mach_cred:\n");
6956 dfprintk(MOUNT, " minimal mode enabled\n");
6957 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6958 } else {
6959 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6960 return -EINVAL;
6961 }
fa940720
WAA		 6962
6963 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6964 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6965 dfprintk(MOUNT, " cleanup mode enabled\n");
6966 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6967 }
8b5bee2e
WAA		 6968
6969 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6970 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6971 dfprintk(MOUNT, " secinfo mode enabled\n");
6972 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6973 }
3787d506
WAA		 6974
6975 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6976 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6977 dfprintk(MOUNT, " stateid mode enabled\n");
6978 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6979 }
8c21c62c
WAA		 6980
6981 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6982 dfprintk(MOUNT, " write mode enabled\n");
6983 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6984 }
6985
6986 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6987 dfprintk(MOUNT, " commit mode enabled\n");
6988 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6989 }
2031cd1a
WAA		 6990 }
6991
6992 return 0;
6993}
6994
6995/*
6996 * _nfs4_proc_exchange_id()
6bbb4ae8 6997 *
2031cd1a 6998 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6999 */
2031cd1a
WAA		 7000static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7001 u32 sp4_how)
99fe60d0
BH		 7002{
7003 nfs4_verifier verifier;
7004 struct nfs41_exchange_id_args args = {
cd93710e 7005 .verifier = &verifier,
99fe60d0 7006 .client = clp,
cd3fadec 7007#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7008 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7009 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7010 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7011#else
7012 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7013 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7014#endif
99fe60d0
BH		 7015 };
7016 struct nfs41_exchange_id_res res = {
32b01310 7017 0
99fe60d0
BH		 7018 };
7019 int status;
7020 struct rpc_message msg = {
7021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7022 .rpc_argp = &args,
7023 .rpc_resp = &res,
7024 .rpc_cred = cred,
7025 };
99fe60d0 7026
f092075d 7027 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7028
7029 status = nfs4_init_uniform_client_string(clp);
7030 if (status)
3a6bb738 7031 goto out;
3a6bb738
JL		 7032
7033 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7034 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7035 clp->cl_owner_id);
99fe60d0 7036
acdeb69d 7037 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7038 GFP_NOFS);
acdeb69d 7039 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7040 status = -ENOMEM;
7041 goto out;
7042 }
78fe0f41 7043
79d4e1f0 7044 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7045 GFP_NOFS);
177313f1 7046 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7047 status = -ENOMEM;
acdeb69d 7048 goto out_server_owner;
abe9a6d5 7049 }
78fe0f41 7050
bbafffd2 7051 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7052 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7053 status = -ENOMEM;
7054 goto out_server_scope;
7055 }
7056
2031cd1a
WAA		 7057 switch (sp4_how) {
7058 case SP4_NONE:
7059 args.state_protect.how = SP4_NONE;
7060 break;
7061
7062 case SP4_MACH_CRED:
7063 args.state_protect = nfs4_sp4_mach_cred_request;
7064 break;
7065
7066 default:
7067 /* unsupported! */
7068 WARN_ON_ONCE(1);
7069 status = -EINVAL;
6b55970b 7070 goto out_impl_id;
2031cd1a
WAA		 7071 }
7072
1bd714f2 7073 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7074 trace_nfs4_exchange_id(clp, status);
177313f1 7075 if (status == 0)
32b01310 7076 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7077
2031cd1a
WAA		 7078 if (status == 0)
7079 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7080
acdeb69d 7081 if (status == 0) {
32b01310 7082 clp->cl_clientid = res.clientid;
e11259f9
TM		 7083 clp->cl_exchange_flags = res.flags;
7084 /* Client ID is not confirmed */
7085 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7086 clear_bit(NFS4_SESSION_ESTABLISHED,
7087 &clp->cl_session->session_state);
32b01310 7088 clp->cl_seqid = res.seqid;
e11259f9 7089 }
32b01310 7090
acdeb69d
CL		 7091 kfree(clp->cl_serverowner);
7092 clp->cl_serverowner = res.server_owner;
7093 res.server_owner = NULL;
78fe0f41 7094
7d2ed9ac 7095 /* use the most recent implementation id */
59155546
CL		 7096 kfree(clp->cl_implid);
7097 clp->cl_implid = res.impl_id;
6b55970b 7098 res.impl_id = NULL;
7d2ed9ac 7099
177313f1 7100 if (clp->cl_serverscope != NULL &&
79d4e1f0 7101 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7102 res.server_scope)) {
7103 dprintk("%s: server_scope mismatch detected\n",
7104 __func__);
7105 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7106 kfree(clp->cl_serverscope);
7107 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7108 }
7109
177313f1 7110 if (clp->cl_serverscope == NULL) {
79d4e1f0 7111 clp->cl_serverscope = res.server_scope;
6b55970b 7112 res.server_scope = NULL;
abe9a6d5 7113 }
6b55970b 7114 }
7d2ed9ac 7115
6b55970b
KM		 7116out_impl_id:
7117 kfree(res.impl_id);
7d2ed9ac 7118out_server_scope:
abe9a6d5 7119 kfree(res.server_scope);
6b55970b
KM		 7120out_server_owner:
7121 kfree(res.server_owner);
abe9a6d5 7122out:
177313f1 7123 if (clp->cl_implid != NULL)
6bbb4ae8 7124 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7125 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7126 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7127 clp->cl_implid->date.seconds,
7128 clp->cl_implid->date.nseconds);
6bbb4ae8 7129 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7130 return status;
7131}
7132
2031cd1a
WAA		 7133/*
7134 * nfs4_proc_exchange_id()
7135 *
7136 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7137 *
7138 * Since the clientid has expired, all compounds using sessions
7139 * associated with the stale clientid will be returning
7140 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7141 * be in some phase of session reset.
7142 *
7143 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7144 */
7145int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7146{
7147 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7148 int status;
7149
7150 /* try SP4_MACH_CRED if krb5i/p */
7151 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7152 authflavor == RPC_AUTH_GSS_KRB5P) {
7153 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7154 if (!status)
7155 return 0;
7156 }
7157
7158 /* try SP4_NONE */
7159 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7160}
7161
66245539
TM		 7162static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7163 struct rpc_cred *cred)
7164{
7165 struct rpc_message msg = {
7166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7167 .rpc_argp = clp,
7168 .rpc_cred = cred,
7169 };
7170 int status;
7171
7172 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7173 trace_nfs4_destroy_clientid(clp, status);
66245539 7174 if (status)
02c67525 7175 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7176 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7177 return status;
7178}
7179
7180static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7181 struct rpc_cred *cred)
7182{
7183 unsigned int loop;
7184 int ret;
7185
7186 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7187 ret = _nfs4_proc_destroy_clientid(clp, cred);
7188 switch (ret) {
7189 case -NFS4ERR_DELAY:
7190 case -NFS4ERR_CLIENTID_BUSY:
7191 ssleep(1);
7192 break;
7193 default:
7194 return ret;
7195 }
7196 }
7197 return 0;
7198}
7199
7200int nfs4_destroy_clientid(struct nfs_client *clp)
7201{
7202 struct rpc_cred *cred;
7203 int ret = 0;
7204
7205 if (clp->cl_mvops->minor_version < 1)
7206 goto out;
7207 if (clp->cl_exchange_flags == 0)
7208 goto out;
05f4c350
CL		 7209 if (clp->cl_preserve_clid)
7210 goto out;
73d8bde5 7211 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7212 ret = nfs4_proc_destroy_clientid(clp, cred);
7213 if (cred)
7214 put_rpccred(cred);
7215 switch (ret) {
7216 case 0:
7217 case -NFS4ERR_STALE_CLIENTID:
7218 clp->cl_exchange_flags = 0;
7219 }
7220out:
7221 return ret;
7222}
7223
2050f0cc
AA		 7224struct nfs4_get_lease_time_data {
7225 struct nfs4_get_lease_time_args *args;
7226 struct nfs4_get_lease_time_res *res;
7227 struct nfs_client *clp;
7228};
7229
7230static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7231 void *calldata)
7232{
2050f0cc
AA		 7233 struct nfs4_get_lease_time_data *data =
7234 (struct nfs4_get_lease_time_data *)calldata;
7235
7236 dprintk("--> %s\n", __func__);
7237 /* just setup sequence, do not trigger session recovery
7238 since we're invoked within one */
d9afbd1b
TM		 7239 nfs41_setup_sequence(data->clp->cl_session,
7240 &data->args->la_seq_args,
7241 &data->res->lr_seq_res,
7242 task);
2050f0cc
AA		 7243 dprintk("<-- %s\n", __func__);
7244}
7245
7246/*
7247 * Called from nfs4_state_manager thread for session setup, so don't recover
7248 * from sequence operation or clientid errors.
7249 */
7250static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7251{
7252 struct nfs4_get_lease_time_data *data =
7253 (struct nfs4_get_lease_time_data *)calldata;
7254
7255 dprintk("--> %s\n", __func__);
14516c3a
TM		 7256 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7257 return;
2050f0cc
AA		 7258 switch (task->tk_status) {
7259 case -NFS4ERR_DELAY:
7260 case -NFS4ERR_GRACE:
7261 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7262 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7263 task->tk_status = 0;
a8a4ae3a
AA		 7264 /* fall through */
7265 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7266 rpc_restart_call_prepare(task);
2050f0cc
AA		 7267 return;
7268 }
2050f0cc
AA		 7269 dprintk("<-- %s\n", __func__);
7270}
7271
17280175 7272static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7273 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7274 .rpc_call_done = nfs4_get_lease_time_done,
7275};
7276
7277int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7278{
7279 struct rpc_task *task;
7280 struct nfs4_get_lease_time_args args;
7281 struct nfs4_get_lease_time_res res = {
7282 .lr_fsinfo = fsinfo,
7283 };
7284 struct nfs4_get_lease_time_data data = {
7285 .args = &args,
7286 .res = &res,
7287 .clp = clp,
7288 };
7289 struct rpc_message msg = {
7290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7291 .rpc_argp = &args,
7292 .rpc_resp = &res,
7293 };
7294 struct rpc_task_setup task_setup = {
7295 .rpc_client = clp->cl_rpcclient,
7296 .rpc_message = &msg,
7297 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7298 .callback_data = &data,
7299 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7300 };
7301 int status;
7302
a9c92d6b 7303 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7304 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7305 dprintk("--> %s\n", __func__);
7306 task = rpc_run_task(&task_setup);
7307
7308 if (IS_ERR(task))
7309 status = PTR_ERR(task);
7310 else {
7311 status = task->tk_status;
7312 rpc_put_task(task);
7313 }
7314 dprintk("<-- %s return %d\n", __func__, status);
7315
7316 return status;
7317}
7318
fc931582
AA		 7319/*
7320 * Initialize the values to be used by the client in CREATE_SESSION
7321 * If nfs4_init_session set the fore channel request and response sizes,
7322 * use them.
7323 *
7324 * Set the back channel max_resp_sz_cached to zero to force the client to
7325 * always set csa_cachethis to FALSE because the current implementation
7326 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7327 */
7328static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7329{
18aad3d5
AA		 7330 unsigned int max_rqst_sz, max_resp_sz;
7331
7332 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7333 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7334
fc931582 7335 /* Fore channel attributes */
18aad3d5
AA		 7336 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7337 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7338 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7339 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7340
7341 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7342 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7343 __func__,
7344 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7345 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7346
7347 /* Back channel attributes */
fc931582
AA		 7348 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7349 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7350 args->bc_attrs.max_resp_sz_cached = 0;
7351 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7352 args->bc_attrs.max_reqs = 1;
7353
7354 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7355 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7356 __func__,
7357 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7358 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7359 args->bc_attrs.max_reqs);
7360}
7361
79969dd1
TM		 7362static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7363 struct nfs41_create_session_res *res)
8d35301d 7364{
43c2e885 7365 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7366 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7367
43c2e885
BF		 7368 if (rcvd->max_resp_sz > sent->max_resp_sz)
7369 return -EINVAL;
7370 /*
7371 * Our requested max_ops is the minimum we need; we're not
7372 * prepared to break up compounds into smaller pieces than that.
7373 * So, no point even trying to continue if the server won't
7374 * cooperate:
7375 */
7376 if (rcvd->max_ops < sent->max_ops)
7377 return -EINVAL;
7378 if (rcvd->max_reqs == 0)
7379 return -EINVAL;
b4b9a0c1
VG		 7380 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7381 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7382 return 0;
8d35301d
AA		 7383}
7384
79969dd1
TM		 7385static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7386 struct nfs41_create_session_res *res)
43c2e885
BF		 7387{
7388 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7389 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7390
b1c0df5f
TM		 7391 if (!(res->flags & SESSION4_BACK_CHAN))
7392 goto out;
43c2e885
BF		 7393 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7394 return -EINVAL;
7395 if (rcvd->max_resp_sz < sent->max_resp_sz)
7396 return -EINVAL;
7397 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7398 return -EINVAL;
7399 /* These would render the backchannel useless: */
b4b9a0c1 7400 if (rcvd->max_ops != sent->max_ops)
43c2e885 7401 return -EINVAL;
b4b9a0c1 7402 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7403 return -EINVAL;
b1c0df5f 7404out:
43c2e885
BF		 7405 return 0;
7406}
8d35301d 7407
8d35301d 7408static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7409 struct nfs41_create_session_res *res)
8d35301d 7410{
43c2e885 7411 int ret;
8d35301d 7412
79969dd1 7413 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7414 if (ret)
7415 return ret;
79969dd1
TM		 7416 return nfs4_verify_back_channel_attrs(args, res);
7417}
7418
7419static void nfs4_update_session(struct nfs4_session *session,
7420 struct nfs41_create_session_res *res)
7421{
7422 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7423 /* Mark client id and session as being confirmed */
7424 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7425 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7426 session->flags = res->flags;
7427 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7428 if (res->flags & SESSION4_BACK_CHAN)
7429 memcpy(&session->bc_attrs, &res->bc_attrs,
7430 sizeof(session->bc_attrs));
8d35301d
AA		 7431}
7432
848f5bda
TM		 7433static int _nfs4_proc_create_session(struct nfs_client *clp,
7434 struct rpc_cred *cred)
fc931582
AA		 7435{
7436 struct nfs4_session *session = clp->cl_session;
7437 struct nfs41_create_session_args args = {
7438 .client = clp,
79969dd1
TM		 7439 .clientid = clp->cl_clientid,
7440 .seqid = clp->cl_seqid,
fc931582
AA		 7441 .cb_program = NFS4_CALLBACK,
7442 };
79969dd1
TM		 7443 struct nfs41_create_session_res res;
7444
fc931582
AA		 7445 struct rpc_message msg = {
7446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7447 .rpc_argp = &args,
7448 .rpc_resp = &res,
848f5bda 7449 .rpc_cred = cred,
fc931582
AA		 7450 };
7451 int status;
7452
7453 nfs4_init_channel_attrs(&args);
0f91421e 7454 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7455
1bd714f2 7456 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7457 trace_nfs4_create_session(clp, status);
fc931582 7458
43095d39 7459 if (!status) {
8d35301d 7460 /* Verify the session's negotiated channel_attrs values */
79969dd1 7461 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7462 /* Increment the clientid slot sequence id */
79969dd1
TM		 7463 if (clp->cl_seqid == res.seqid)
7464 clp->cl_seqid++;
7465 if (status)
7466 goto out;
7467 nfs4_update_session(session, &res);
fc931582 7468 }
79969dd1 7469out:
fc931582
AA		 7470 return status;
7471}
7472
7473/*
7474 * Issues a CREATE_SESSION operation to the server.
7475 * It is the responsibility of the caller to verify the session is
7476 * expired before calling this routine.
7477 */
848f5bda 7478int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7479{
7480 int status;
7481 unsigned *ptr;
fc931582
AA		 7482 struct nfs4_session *session = clp->cl_session;
7483
7484 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7485
848f5bda 7486 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7487 if (status)
7488 goto out;
7489
aacd5537
AA		 7490 /* Init or reset the session slot tables */
7491 status = nfs4_setup_session_slot_tables(session);
7492 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7493 if (status)
7494 goto out;
7495
7496 ptr = (unsigned *)&session->sess_id.data[0];
7497 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7498 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7499out:
7500 dprintk("<-- %s\n", __func__);
7501 return status;
7502}
7503
0f3e66c6
AA		 7504/*
7505 * Issue the over-the-wire RPC DESTROY_SESSION.
7506 * The caller must serialize access to this routine.
7507 */
848f5bda
TM		 7508int nfs4_proc_destroy_session(struct nfs4_session *session,
7509 struct rpc_cred *cred)
0f3e66c6 7510{
848f5bda
TM		 7511 struct rpc_message msg = {
7512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7513 .rpc_argp = session,
7514 .rpc_cred = cred,
7515 };
0f3e66c6 7516 int status = 0;
0f3e66c6
AA		 7517
7518 dprintk("--> nfs4_proc_destroy_session\n");
7519
7520 /* session is still being setup */
e11259f9
TM		 7521 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7522 return 0;
0f3e66c6 7523
1bd714f2 7524 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7525 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7526
7527 if (status)
08106ac7 7528 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7529 "Session has been destroyed regardless...\n", status);
7530
7531 dprintk("<-- nfs4_proc_destroy_session\n");
7532 return status;
7533}
7534
fc01cea9
AA		 7535/*
7536 * Renew the cl_session lease.
7537 */
d5f8d3fe
TM		 7538struct nfs4_sequence_data {
7539 struct nfs_client *clp;
7540 struct nfs4_sequence_args args;
7541 struct nfs4_sequence_res res;
7542};
7543
dc96aef9
AB		 7544static void nfs41_sequence_release(void *data)
7545{
d5f8d3fe
TM		 7546 struct nfs4_sequence_data *calldata = data;
7547 struct nfs_client *clp = calldata->clp;
dc96aef9 7548
7135840f
AB		 7549 if (atomic_read(&clp->cl_count) > 1)
7550 nfs4_schedule_state_renewal(clp);
7551 nfs_put_client(clp);
d5f8d3fe 7552 kfree(calldata);
dc96aef9
AB		 7553}
7554
aa5190d0
TM		 7555static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7556{
7557 switch(task->tk_status) {
7558 case -NFS4ERR_DELAY:
aa5190d0
TM		 7559 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7560 return -EAGAIN;
7561 default:
0400a6b0 7562 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7563 }
7564 return 0;
7565}
7566
dc96aef9 7567static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7568{
d5f8d3fe
TM		 7569 struct nfs4_sequence_data *calldata = data;
7570 struct nfs_client *clp = calldata->clp;
fc01cea9 7571
14516c3a
TM		 7572 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7573 return;
fc01cea9 7574
c6d01c6f 7575 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7576 if (task->tk_status < 0) {
7577 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7578 if (atomic_read(&clp->cl_count) == 1)
7579 goto out;
fc01cea9 7580
aa5190d0
TM		 7581 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7582 rpc_restart_call_prepare(task);
fc01cea9
AA		 7583 return;
7584 }
7585 }
fc01cea9 7586 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7587out:
fc01cea9
AA		 7588 dprintk("<-- %s\n", __func__);
7589}
7590
7591static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7592{
d5f8d3fe
TM		 7593 struct nfs4_sequence_data *calldata = data;
7594 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7595 struct nfs4_sequence_args *args;
7596 struct nfs4_sequence_res *res;
7597
fc01cea9
AA		 7598 args = task->tk_msg.rpc_argp;
7599 res = task->tk_msg.rpc_resp;
7600
d9afbd1b 7601 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7602}
7603
7604static const struct rpc_call_ops nfs41_sequence_ops = {
7605 .rpc_call_done = nfs41_sequence_call_done,
7606 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7607 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7608};
7609
8fe72bac
TM		 7610static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7611 struct rpc_cred *cred,
7612 bool is_privileged)
fc01cea9 7613{
d5f8d3fe 7614 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7615 struct rpc_message msg = {
7616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7617 .rpc_cred = cred,
7618 };
71ac6da9
TM		 7619 struct rpc_task_setup task_setup_data = {
7620 .rpc_client = clp->cl_rpcclient,
7621 .rpc_message = &msg,
8fe72bac 7622 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7623 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7624 };
fc01cea9 7625
7135840f 7626 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7627 return ERR_PTR(-EIO);
dfb4f309 7628 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7629 if (calldata == NULL) {
7135840f 7630 nfs_put_client(clp);
71ac6da9 7631 return ERR_PTR(-ENOMEM);
fc01cea9 7632 }
a9c92d6b 7633 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7634 if (is_privileged)
7635 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7636 msg.rpc_argp = &calldata->args;
7637 msg.rpc_resp = &calldata->res;
7638 calldata->clp = clp;
71ac6da9 7639 task_setup_data.callback_data = calldata;
fc01cea9 7640
71ac6da9
TM		 7641 return rpc_run_task(&task_setup_data);
7642}
7643
2f60ea6b 7644static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7645{
7646 struct rpc_task *task;
7647 int ret = 0;
7648
2f60ea6b 7649 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7650 return -EAGAIN;
8fe72bac 7651 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7652 if (IS_ERR(task))
7653 ret = PTR_ERR(task);
7654 else
bf294b41 7655 rpc_put_task_async(task);
71ac6da9
TM		 7656 dprintk("<-- %s status=%d\n", __func__, ret);
7657 return ret;
7658}
7659
7660static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7661{
7662 struct rpc_task *task;
7663 int ret;
7664
8fe72bac 7665 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7666 if (IS_ERR(task)) {
7667 ret = PTR_ERR(task);
7668 goto out;
7669 }
7670 ret = rpc_wait_for_completion_task(task);
be824167 7671 if (!ret)
71ac6da9
TM		 7672 ret = task->tk_status;
7673 rpc_put_task(task);
7674out:
7675 dprintk("<-- %s status=%d\n", __func__, ret);
7676 return ret;
fc01cea9
AA		 7677}
7678
fce5c838
RL		 7679struct nfs4_reclaim_complete_data {
7680 struct nfs_client *clp;
7681 struct nfs41_reclaim_complete_args arg;
7682 struct nfs41_reclaim_complete_res res;
7683};
7684
7685static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7686{
7687 struct nfs4_reclaim_complete_data *calldata = data;
7688
d9afbd1b
TM		 7689 nfs41_setup_sequence(calldata->clp->cl_session,
7690 &calldata->arg.seq_args,
7691 &calldata->res.seq_res,
7692 task);
fce5c838
RL		 7693}
7694
aa5190d0
TM		 7695static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7696{
7697 switch(task->tk_status) {
7698 case 0:
7699 case -NFS4ERR_COMPLETE_ALREADY:
7700 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7701 break;
7702 case -NFS4ERR_DELAY:
aa5190d0 7703 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7704 /* fall through */
7705 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7706 return -EAGAIN;
7707 default:
0400a6b0 7708 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7709 }
7710 return 0;
7711}
7712
fce5c838
RL		 7713static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7714{
7715 struct nfs4_reclaim_complete_data *calldata = data;
7716 struct nfs_client *clp = calldata->clp;
7717 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7718
7719 dprintk("--> %s\n", __func__);
14516c3a
TM		 7720 if (!nfs41_sequence_done(task, res))
7721 return;
fce5c838 7722
c6d01c6f 7723 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7724 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7725 rpc_restart_call_prepare(task);
7726 return;
7727 }
fce5c838
RL		 7728 dprintk("<-- %s\n", __func__);
7729}
7730
7731static void nfs4_free_reclaim_complete_data(void *data)
7732{
7733 struct nfs4_reclaim_complete_data *calldata = data;
7734
7735 kfree(calldata);
7736}
7737
7738static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7739 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7740 .rpc_call_done = nfs4_reclaim_complete_done,
7741 .rpc_release = nfs4_free_reclaim_complete_data,
7742};
7743
7744/*
7745 * Issue a global reclaim complete.
7746 */
965e9c23
TM		 7747static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7748 struct rpc_cred *cred)
fce5c838
RL		 7749{
7750 struct nfs4_reclaim_complete_data *calldata;
7751 struct rpc_task *task;
7752 struct rpc_message msg = {
7753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7754 .rpc_cred = cred,
fce5c838
RL		 7755 };
7756 struct rpc_task_setup task_setup_data = {
7757 .rpc_client = clp->cl_rpcclient,
7758 .rpc_message = &msg,
7759 .callback_ops = &nfs4_reclaim_complete_call_ops,
7760 .flags = RPC_TASK_ASYNC,
7761 };
7762 int status = -ENOMEM;
7763
7764 dprintk("--> %s\n", __func__);
8535b2be 7765 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7766 if (calldata == NULL)
7767 goto out;
7768 calldata->clp = clp;
7769 calldata->arg.one_fs = 0;
fce5c838 7770
a9c92d6b 7771 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7772 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7773 msg.rpc_argp = &calldata->arg;
7774 msg.rpc_resp = &calldata->res;
7775 task_setup_data.callback_data = calldata;
7776 task = rpc_run_task(&task_setup_data);
acf82b85 7777 if (IS_ERR(task)) {
fce5c838 7778 status = PTR_ERR(task);
acf82b85
DC		 7779 goto out;
7780 }
c34c32ea
AA		 7781 status = nfs4_wait_for_completion_rpc_task(task);
7782 if (status == 0)
7783 status = task->tk_status;
fce5c838 7784 rpc_put_task(task);
acf82b85 7785 return 0;
fce5c838
RL		 7786out:
7787 dprintk("<-- %s status=%d\n", __func__, status);
7788 return status;
7789}
b1f69b75
AA		 7790
7791static void
7792nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7793{
7794 struct nfs4_layoutget *lgp = calldata;
c31663d4 7795 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7796 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7797
7798 dprintk("--> %s\n", __func__);
c31663d4
FI		 7799 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7800 * right now covering the LAYOUTGET we are about to send.
7801 * However, that is not so catastrophic, and there seems
7802 * to be no way to prevent it completely.
7803 */
6ba7db34 7804 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7805 &lgp->res.seq_res, task))
b1f69b75 7806 return;
cf7d63f1
FI		 7807 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7808 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7809 &lgp->args.range,
cf7d63f1
FI		 7810 lgp->args.ctx->state)) {
7811 rpc_exit(task, NFS4_OK);
cf7d63f1 7812 }
b1f69b75
AA		 7813}
7814
7815static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7816{
7817 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7818 struct inode *inode = lgp->args.inode;
7819 struct nfs_server *server = NFS_SERVER(inode);
7820 struct pnfs_layout_hdr *lo;
7821 struct nfs4_state *state = NULL;
ed7e5423 7822 unsigned long timeo, now, giveup;
b1f69b75 7823
ed7e5423 7824 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7825
6ba7db34 7826 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7827 goto out;
b1f69b75
AA		 7828
7829 switch (task->tk_status) {
7830 case 0:
ee314c2a 7831 goto out;
21b874c8
TM		 7832 /*
7833 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7834 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7835 */
7836 case -NFS4ERR_BADLAYOUT:
7837 goto out_overflow;
ed7e5423
BH		 7838 /*
7839 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7840 * (or clients) writing to the same RAID stripe except when
7841 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7842 */
b1f69b75 7843 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7844 if (lgp->args.minlength == 0)
7845 goto out_overflow;
ed7e5423
BH		 7846 /*
7847 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7848 * existing layout before getting a new one).
7849 */
b1f69b75 7850 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7851 timeo = rpc_get_timeout(task->tk_client);
7852 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7853 now = jiffies;
7854 if (time_after(giveup, now)) {
7855 unsigned long delay;
7856
7857 /* Delay for:
7858 * - Not less then NFS4_POLL_RETRY_MIN.
7859 * - One last time a jiffie before we give up
7860 * - exponential backoff (time_now minus start_attempt)
7861 */
7862 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7863 min((giveup - now - 1),
7864 now - lgp->args.timestamp));
7865
7866 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7867 __func__, delay);
7868 rpc_delay(task, delay);
2259f960
TM		 7869 /* Do not call nfs4_async_handle_error() */
7870 goto out_restart;
ed7e5423 7871 }
ee314c2a
TM		 7872 break;
7873 case -NFS4ERR_EXPIRED:
7874 case -NFS4ERR_BAD_STATEID:
7875 spin_lock(&inode->i_lock);
2259f960
TM		 7876 if (nfs4_stateid_match(&lgp->args.stateid,
7877 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7878 spin_unlock(&inode->i_lock);
7879 /* If the open stateid was bad, then recover it. */
7880 state = lgp->args.ctx->state;
2259f960
TM		 7881 break;
7882 }
7883 lo = NFS_I(inode)->layout;
7884 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7885 &lo->plh_stateid)) {
ee314c2a
TM		 7886 LIST_HEAD(head);
7887
defb8460
CH		 7888 /*
7889 * Mark the bad layout state as invalid, then retry
7890 * with the current stateid.
7891 */
8714d46d 7892 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7893 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7894 spin_unlock(&inode->i_lock);
ee314c2a 7895 pnfs_free_lseg_list(&head);
2259f960
TM		 7896 } else
7897 spin_unlock(&inode->i_lock);
7898 goto out_restart;
b1f69b75 7899 }
8478eaa1 7900 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
2259f960 7901 goto out_restart;
ee314c2a 7902out:
b1f69b75 7903 dprintk("<-- %s\n", __func__);
21b874c8 7904 return;
2259f960
TM		 7905out_restart:
7906 task->tk_status = 0;
7907 rpc_restart_call_prepare(task);
7908 return;
21b874c8
TM		 7909out_overflow:
7910 task->tk_status = -EOVERFLOW;
7911 goto out;
b1f69b75
AA		 7912}
7913
8554116e
IK		 7914static size_t max_response_pages(struct nfs_server *server)
7915{
7916 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7917 return nfs_page_array_len(0, max_resp_sz);
7918}
7919
7920static void nfs4_free_pages(struct page **pages, size_t size)
7921{
7922 int i;
7923
7924 if (!pages)
7925 return;
7926
7927 for (i = 0; i < size; i++) {
7928 if (!pages[i])
7929 break;
7930 __free_page(pages[i]);
7931 }
7932 kfree(pages);
7933}
7934
7935static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7936{
7937 struct page **pages;
7938 int i;
7939
7940 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7941 if (!pages) {
7942 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7943 return NULL;
7944 }
7945
7946 for (i = 0; i < size; i++) {
7947 pages[i] = alloc_page(gfp_flags);
7948 if (!pages[i]) {
7949 dprintk("%s: failed to allocate page\n", __func__);
7950 nfs4_free_pages(pages, size);
7951 return NULL;
7952 }
7953 }
7954
7955 return pages;
7956}
7957
b1f69b75
AA		 7958static void nfs4_layoutget_release(void *calldata)
7959{
7960 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7961 struct inode *inode = lgp->args.inode;
7962 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7963 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7964
7965 dprintk("--> %s\n", __func__);
8554116e 7966 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7967 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7968 put_nfs_open_context(lgp->args.ctx);
7969 kfree(calldata);
7970 dprintk("<-- %s\n", __func__);
7971}
7972
7973static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7974 .rpc_call_prepare = nfs4_layoutget_prepare,
7975 .rpc_call_done = nfs4_layoutget_done,
7976 .rpc_release = nfs4_layoutget_release,
7977};
7978
a0b0a6e3
TM		 7979struct pnfs_layout_segment *
7980nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7981{
a47970ff
WAA		 7982 struct inode *inode = lgp->args.inode;
7983 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7984 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7985 struct rpc_task *task;
7986 struct rpc_message msg = {
7987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7988 .rpc_argp = &lgp->args,
7989 .rpc_resp = &lgp->res,
6ab59344 7990 .rpc_cred = lgp->cred,
b1f69b75
AA		 7991 };
7992 struct rpc_task_setup task_setup_data = {
7993 .rpc_client = server->client,
7994 .rpc_message = &msg,
7995 .callback_ops = &nfs4_layoutget_call_ops,
7996 .callback_data = lgp,
7997 .flags = RPC_TASK_ASYNC,
7998 };
a0b0a6e3 7999 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 8000 int status = 0;
8001
8002 dprintk("--> %s\n", __func__);
8003
4bd5a980
PT		 8004 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8005 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8006
8554116e
IK		 8007 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8008 if (!lgp->args.layout.pages) {
8009 nfs4_layoutget_release(lgp);
a0b0a6e3 8010 return ERR_PTR(-ENOMEM);
8554116e
IK		 8011 }
8012 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 8013 lgp->args.timestamp = jiffies;
8554116e 8014
35124a09 8015 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8016 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8017 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8018
b1f69b75
AA		 8019 task = rpc_run_task(&task_setup_data);
8020 if (IS_ERR(task))
a0b0a6e3 8021 return ERR_CAST(task);
b1f69b75 8022 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 8023 if (status == 0)
8024 status = task->tk_status;
1037e6ea
TM		 8025 trace_nfs4_layoutget(lgp->args.ctx,
8026 &lgp->args.range,
8027 &lgp->res.range,
8028 status);
085b7a45
WAA		 8029 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8030 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8031 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8032 rpc_put_task(task);
8033 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8034 if (status)
8035 return ERR_PTR(status);
8036 return lseg;
b1f69b75
AA		 8037}
8038
cbe82603
BH		 8039static void
8040nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8041{
8042 struct nfs4_layoutreturn *lrp = calldata;
8043
8044 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8045 nfs41_setup_sequence(lrp->clp->cl_session,
8046 &lrp->args.seq_args,
8047 &lrp->res.seq_res,
8048 task);
cbe82603
BH		 8049}
8050
8051static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8052{
8053 struct nfs4_layoutreturn *lrp = calldata;
8054 struct nfs_server *server;
8055
8056 dprintk("--> %s\n", __func__);
8057
6ba7db34 8058 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8059 return;
8060
8061 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8062 switch (task->tk_status) {
8063 default:
8064 task->tk_status = 0;
8065 case 0:
8066 break;
8067 case -NFS4ERR_DELAY:
8478eaa1 8068 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8069 break;
d00c5d43 8070 rpc_restart_call_prepare(task);
cbe82603
BH		 8071 return;
8072 }
cbe82603
BH		 8073 dprintk("<-- %s\n", __func__);
8074}
8075
8076static void nfs4_layoutreturn_release(void *calldata)
8077{
8078 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8079 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8080 LIST_HEAD(freeme);
cbe82603
BH		 8081
8082 dprintk("--> %s\n", __func__);
849b286f
TM		 8083 spin_lock(&lo->plh_inode->i_lock);
8084 if (lrp->res.lrs_present)
8085 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8086 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8087 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8088 lo->plh_block_lgets--;
8089 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8090 pnfs_free_lseg_list(&freeme);
70c3bd2b 8091 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8092 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8093 kfree(calldata);
8094 dprintk("<-- %s\n", __func__);
8095}
8096
8097static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8098 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8099 .rpc_call_done = nfs4_layoutreturn_done,
8100 .rpc_release = nfs4_layoutreturn_release,
8101};
8102
6c16605d 8103int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8104{
8105 struct rpc_task *task;
8106 struct rpc_message msg = {
8107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8108 .rpc_argp = &lrp->args,
8109 .rpc_resp = &lrp->res,
9556000d 8110 .rpc_cred = lrp->cred,
cbe82603
BH		 8111 };
8112 struct rpc_task_setup task_setup_data = {
1771c577 8113 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8114 .rpc_message = &msg,
8115 .callback_ops = &nfs4_layoutreturn_call_ops,
8116 .callback_data = lrp,
8117 };
6c16605d 8118 int status = 0;
cbe82603
BH		 8119
8120 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8121 if (!sync) {
8122 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8123 if (!lrp->inode) {
8124 nfs4_layoutreturn_release(lrp);
8125 return -EAGAIN;
8126 }
8127 task_setup_data.flags |= RPC_TASK_ASYNC;
8128 }
a9c92d6b 8129 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8130 task = rpc_run_task(&task_setup_data);
8131 if (IS_ERR(task))
8132 return PTR_ERR(task);
5a0ec8ac
TM		 8133 if (sync)
8134 status = task->tk_status;
1037e6ea 8135 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8136 dprintk("<-- %s status=%d\n", __func__, status);
8137 rpc_put_task(task);
8138 return status;
8139}
8140
b1f69b75 8141static int
cd5875fe
TM		 8142_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8143 struct pnfs_device *pdev,
8144 struct rpc_cred *cred)
b1f69b75
AA		 8145{
8146 struct nfs4_getdeviceinfo_args args = {
8147 .pdev = pdev,
4e590803
TM		 8148 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8149 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8150 };
8151 struct nfs4_getdeviceinfo_res res = {
8152 .pdev = pdev,
8153 };
8154 struct rpc_message msg = {
8155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8156 .rpc_argp = &args,
8157 .rpc_resp = &res,
cd5875fe 8158 .rpc_cred = cred,
b1f69b75
AA		 8159 };
8160 int status;
8161
8162 dprintk("--> %s\n", __func__);
7c513058 8163 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8164 if (res.notification & ~args.notify_types)
8165 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8166 if (res.notification != args.notify_types)
8167 pdev->nocache = 1;
4e590803 8168
b1f69b75
AA		 8169 dprintk("<-- %s status=%d\n", __func__, status);
8170
8171 return status;
8172}
8173
cd5875fe
TM		 8174int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8175 struct pnfs_device *pdev,
8176 struct rpc_cred *cred)
b1f69b75
AA		 8177{
8178 struct nfs4_exception exception = { };
8179 int err;
8180
8181 do {
8182 err = nfs4_handle_exception(server,
cd5875fe 8183 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8184 &exception);
8185 } while (exception.retry);
8186 return err;
8187}
8188EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8189
863a3c6c
AA		 8190static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8191{
8192 struct nfs4_layoutcommit_data *data = calldata;
8193 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8194 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8195
d9afbd1b
TM		 8196 nfs41_setup_sequence(session,
8197 &data->args.seq_args,
8198 &data->res.seq_res,
8199 task);
863a3c6c
AA		 8200}
8201
8202static void
8203nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8204{
8205 struct nfs4_layoutcommit_data *data = calldata;
8206 struct nfs_server *server = NFS_SERVER(data->args.inode);
8207
6ba7db34 8208 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8209 return;
8210
8211 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8212 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8213 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8214 case -NFS4ERR_BADLAYOUT: /* no layout */
8215 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8216 task->tk_status = 0;
e59d27e0 8217 case 0:
e59d27e0
TM		 8218 break;
8219 default:
8478eaa1 8220 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8221 rpc_restart_call_prepare(task);
8222 return;
8223 }
8224 }
863a3c6c
AA		 8225}
8226
8227static void nfs4_layoutcommit_release(void *calldata)
8228{
8229 struct nfs4_layoutcommit_data *data = calldata;
8230
db29c089 8231 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8232 nfs_post_op_update_inode_force_wcc(data->args.inode,
8233 data->res.fattr);
863a3c6c 8234 put_rpccred(data->cred);
472e2594 8235 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8236 kfree(data);
8237}
8238
8239static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8240 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8241 .rpc_call_done = nfs4_layoutcommit_done,
8242 .rpc_release = nfs4_layoutcommit_release,
8243};
8244
8245int
ef311537 8246nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8247{
8248 struct rpc_message msg = {
8249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8250 .rpc_argp = &data->args,
8251 .rpc_resp = &data->res,
8252 .rpc_cred = data->cred,
8253 };
8254 struct rpc_task_setup task_setup_data = {
8255 .task = &data->task,
8256 .rpc_client = NFS_CLIENT(data->args.inode),
8257 .rpc_message = &msg,
8258 .callback_ops = &nfs4_layoutcommit_ops,
8259 .callback_data = data,
863a3c6c
AA		 8260 };
8261 struct rpc_task *task;
8262 int status = 0;
8263
b4839ebe
KM		 8264 dprintk("NFS: initiating layoutcommit call. sync %d "
8265 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8266 data->args.lastbytewritten,
8267 data->args.inode->i_ino);
8268
472e2594
TM		 8269 if (!sync) {
8270 data->inode = nfs_igrab_and_active(data->args.inode);
8271 if (data->inode == NULL) {
8272 nfs4_layoutcommit_release(data);
8273 return -EAGAIN;
8274 }
8275 task_setup_data.flags = RPC_TASK_ASYNC;
8276 }
a9c92d6b 8277 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8278 task = rpc_run_task(&task_setup_data);
8279 if (IS_ERR(task))
8280 return PTR_ERR(task);
472e2594
TM		 8281 if (sync)
8282 status = task->tk_status;
1037e6ea 8283 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8284 dprintk("%s: status %d\n", __func__, status);
8285 rpc_put_task(task);
8286 return status;
8287}
fca78d6d 8288
97431204
AA		 8289/**
8290 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8291 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8292 */
fca78d6d
BS		 8293static int
8294_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8295 struct nfs_fsinfo *info,
8296 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8297{
8298 struct nfs41_secinfo_no_name_args args = {
8299 .style = SECINFO_STYLE_CURRENT_FH,
8300 };
8301 struct nfs4_secinfo_res res = {
8302 .flavors = flavors,
8303 };
8304 struct rpc_message msg = {
8305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8306 .rpc_argp = &args,
8307 .rpc_resp = &res,
8308 };
b1b3e136 8309 struct rpc_clnt *clnt = server->client;
7cb852df 8310 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8311 int status;
8312
8313 if (use_integrity) {
8314 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8315 cred = nfs4_get_clid_cred(server->nfs_client);
8316 msg.rpc_cred = cred;
b1b3e136
WAA		 8317 }
8318
8319 dprintk("--> %s\n", __func__);
8320 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8321 &res.seq_res, 0);
8322 dprintk("<-- %s status=%d\n", __func__, status);
8323
7cb852df
WAA		 8324 if (cred)
8325 put_rpccred(cred);
b1b3e136
WAA		 8326
8327 return status;
fca78d6d
BS		 8328}
8329
8330static int
8331nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8332 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8333{
8334 struct nfs4_exception exception = { };
8335 int err;
8336 do {
b1b3e136
WAA		 8337 /* first try using integrity protection */
8338 err = -NFS4ERR_WRONGSEC;
8339
8340 /* try to use integrity protection with machine cred */
8341 if (_nfs4_is_integrity_protected(server->nfs_client))
8342 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8343 flavors, true);
8344
8345 /*
8346 * if unable to use integrity protection, or SECINFO with
8347 * integrity protection returns NFS4ERR_WRONGSEC (which is
8348 * disallowed by spec, but exists in deployed servers) use
8349 * the current filesystem's rpc_client and the user cred.
8350 */
8351 if (err == -NFS4ERR_WRONGSEC)
8352 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8353 flavors, false);
8354
fca78d6d
BS		 8355 switch (err) {
8356 case 0:
8357 case -NFS4ERR_WRONGSEC:
78b19bae 8358 case -ENOTSUPP:
05e9cfb4 8359 goto out;
fca78d6d
BS		 8360 default:
8361 err = nfs4_handle_exception(server, err, &exception);
8362 }
8363 } while (exception.retry);
05e9cfb4 8364out:
fca78d6d
BS		 8365 return err;
8366}
8367
8368static int
8369nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8370 struct nfs_fsinfo *info)
8371{
8372 int err;
8373 struct page *page;
367156d9 8374 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8375 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8376 struct nfs4_secinfo4 *secinfo;
8377 int i;
fca78d6d
BS		 8378
8379 page = alloc_page(GFP_KERNEL);
8380 if (!page) {
8381 err = -ENOMEM;
8382 goto out;
8383 }
8384
8385 flavors = page_address(page);
8386 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8387
8388 /*
8389 * Fall back on "guess and check" method if
8390 * the server doesn't support SECINFO_NO_NAME
8391 */
78b19bae 8392 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8393 err = nfs4_find_root_sec(server, fhandle, info);
8394 goto out_freepage;
8395 }
8396 if (err)
8397 goto out_freepage;
8398
58a8cf12
WAA		 8399 for (i = 0; i < flavors->num_flavors; i++) {
8400 secinfo = &flavors->flavors[i];
8401
8402 switch (secinfo->flavor) {
8403 case RPC_AUTH_NULL:
8404 case RPC_AUTH_UNIX:
8405 case RPC_AUTH_GSS:
8406 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8407 &secinfo->flavor_info);
8408 break;
8409 default:
8410 flavor = RPC_AUTH_MAXFLAVOR;
8411 break;
8412 }
8413
4d4b69dd
WAA		 8414 if (!nfs_auth_info_match(&server->auth_info, flavor))
8415 flavor = RPC_AUTH_MAXFLAVOR;
8416
58a8cf12
WAA		 8417 if (flavor != RPC_AUTH_MAXFLAVOR) {
8418 err = nfs4_lookup_root_sec(server, fhandle,
8419 info, flavor);
8420 if (!err)
8421 break;
8422 }
8423 }
8424
8425 if (flavor == RPC_AUTH_MAXFLAVOR)
8426 err = -EPERM;
fca78d6d
BS		 8427
8428out_freepage:
8429 put_page(page);
8430 if (err == -EACCES)
8431 return -EPERM;
8432out:
8433 return err;
8434}
1cab0652 8435
ab7cb0df
TM		 8436static int _nfs41_test_stateid(struct nfs_server *server,
8437 nfs4_stateid *stateid,
8438 struct rpc_cred *cred)
7d974794
BS		 8439{
8440 int status;
8441 struct nfs41_test_stateid_args args = {
1cab0652 8442 .stateid = stateid,
7d974794
BS		 8443 };
8444 struct nfs41_test_stateid_res res;
8445 struct rpc_message msg = {
8446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8447 .rpc_argp = &args,
8448 .rpc_resp = &res,
ab7cb0df 8449 .rpc_cred = cred,
7d974794 8450 };
3787d506
WAA		 8451 struct rpc_clnt *rpc_client = server->client;
8452
8453 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8454 &rpc_client, &msg);
1cab0652 8455
38527b15 8456 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8457 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8458 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8459 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8460 &args.seq_args, &res.seq_res);
38527b15
CL		 8461 if (status != NFS_OK) {
8462 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8463 return status;
38527b15
CL		 8464 }
8465 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8466 return -res.status;
7d974794
BS		 8467}
8468
38527b15
CL		 8469/**
8470 * nfs41_test_stateid - perform a TEST_STATEID operation
8471 *
8472 * @server: server / transport on which to perform the operation
8473 * @stateid: state ID to test
ab7cb0df 8474 * @cred: credential
38527b15
CL		 8475 *
8476 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8477 * Otherwise a negative NFS4ERR value is returned if the operation
8478 * failed or the state ID is not currently valid.
8479 */
ab7cb0df
TM		 8480static int nfs41_test_stateid(struct nfs_server *server,
8481 nfs4_stateid *stateid,
8482 struct rpc_cred *cred)
7d974794
BS		 8483{
8484 struct nfs4_exception exception = { };
8485 int err;
8486 do {
ab7cb0df 8487 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8488 if (err != -NFS4ERR_DELAY)
8489 break;
8490 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8491 } while (exception.retry);
8492 return err;
8493}
9aeda35f 8494
7c1d5fae
TM		 8495struct nfs_free_stateid_data {
8496 struct nfs_server *server;
8497 struct nfs41_free_stateid_args args;
9aeda35f 8498 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8499};
8500
8501static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8502{
8503 struct nfs_free_stateid_data *data = calldata;
8504 nfs41_setup_sequence(nfs4_get_session(data->server),
8505 &data->args.seq_args,
8506 &data->res.seq_res,
8507 task);
8508}
8509
8510static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8511{
8512 struct nfs_free_stateid_data *data = calldata;
8513
8514 nfs41_sequence_done(task, &data->res.seq_res);
8515
8516 switch (task->tk_status) {
8517 case -NFS4ERR_DELAY:
8478eaa1 8518 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8519 rpc_restart_call_prepare(task);
8520 }
8521}
8522
8523static void nfs41_free_stateid_release(void *calldata)
8524{
8525 kfree(calldata);
8526}
8527
17f26b12 8528static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8529 .rpc_call_prepare = nfs41_free_stateid_prepare,
8530 .rpc_call_done = nfs41_free_stateid_done,
8531 .rpc_release = nfs41_free_stateid_release,
8532};
8533
8534static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8535 nfs4_stateid *stateid,
ab7cb0df 8536 struct rpc_cred *cred,
7c1d5fae
TM		 8537 bool privileged)
8538{
9aeda35f
BS		 8539 struct rpc_message msg = {
8540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8541 .rpc_cred = cred,
9aeda35f 8542 };
7c1d5fae
TM		 8543 struct rpc_task_setup task_setup = {
8544 .rpc_client = server->client,
8545 .rpc_message = &msg,
8546 .callback_ops = &nfs41_free_stateid_ops,
8547 .flags = RPC_TASK_ASYNC,
8548 };
8549 struct nfs_free_stateid_data *data;
9aeda35f 8550
3787d506
WAA		 8551 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8552 &task_setup.rpc_client, &msg);
8553
38527b15 8554 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8555 data = kmalloc(sizeof(*data), GFP_NOFS);
8556 if (!data)
8557 return ERR_PTR(-ENOMEM);
8558 data->server = server;
8559 nfs4_stateid_copy(&data->args.stateid, stateid);
8560
8561 task_setup.callback_data = data;
8562
8563 msg.rpc_argp = &data->args;
8564 msg.rpc_resp = &data->res;
a9c92d6b 8565 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8566 if (privileged)
8567 nfs4_set_sequence_privileged(&data->args.seq_args);
8568
8569 return rpc_run_task(&task_setup);
9aeda35f
BS		 8570}
8571
38527b15
CL		 8572/**
8573 * nfs41_free_stateid - perform a FREE_STATEID operation
8574 *
8575 * @server: server / transport on which to perform the operation
8576 * @stateid: state ID to release
ab7cb0df 8577 * @cred: credential
38527b15
CL		 8578 *
8579 * Returns NFS_OK if the server freed "stateid". Otherwise a
8580 * negative NFS4ERR value is returned.
8581 */
ab7cb0df
TM		 8582static int nfs41_free_stateid(struct nfs_server *server,
8583 nfs4_stateid *stateid,
8584 struct rpc_cred *cred)
9aeda35f 8585{
7c1d5fae
TM		 8586 struct rpc_task *task;
8587 int ret;
8588
ab7cb0df 8589 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8590 if (IS_ERR(task))
8591 return PTR_ERR(task);
8592 ret = rpc_wait_for_completion_task(task);
8593 if (!ret)
8594 ret = task->tk_status;
8595 rpc_put_task(task);
8596 return ret;
9aeda35f 8597}
36281caa 8598
f1cdae87
JL		 8599static void
8600nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8601{
8602 struct rpc_task *task;
ab7cb0df 8603 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8604
ab7cb0df 8605 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8606 nfs4_free_lock_state(server, lsp);
8607 if (IS_ERR(task))
f1cdae87 8608 return;
c8b2d0bf 8609 rpc_put_task(task);
c8b2d0bf
TM		 8610}
8611
36281caa
TM		 8612static bool nfs41_match_stateid(const nfs4_stateid *s1,
8613 const nfs4_stateid *s2)
8614{
2d2f24ad 8615 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8616 return false;
8617
2d2f24ad 8618 if (s1->seqid == s2->seqid)
36281caa 8619 return true;
2d2f24ad 8620 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8621 return true;
8622
8623 return false;
8624}
8625
557134a3
AA		 8626#endif /* CONFIG_NFS_V4_1 */
8627
36281caa
TM		 8628static bool nfs4_match_stateid(const nfs4_stateid *s1,
8629 const nfs4_stateid *s2)
8630{
f597c537 8631 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8632}
8633
8634
17280175 8635static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8636 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8637 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8638 .recover_open = nfs4_open_reclaim,
8639 .recover_lock = nfs4_lock_reclaim,
591d71cb 8640 .establish_clid = nfs4_init_clientid,
05f4c350 8641 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8642};
8643
591d71cb 8644#if defined(CONFIG_NFS_V4_1)
17280175 8645static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8646 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8647 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8648 .recover_open = nfs4_open_reclaim,
8649 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8650 .establish_clid = nfs41_init_clientid,
fce5c838 8651 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8652 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8653};
8654#endif /* CONFIG_NFS_V4_1 */
8655
17280175 8656static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8657 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8658 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8659 .recover_open = nfs40_open_expired,
591d71cb
AA		 8660 .recover_lock = nfs4_lock_expired,
8661 .establish_clid = nfs4_init_clientid,
8662};
8663
8664#if defined(CONFIG_NFS_V4_1)
17280175 8665static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8666 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8667 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8668 .recover_open = nfs41_open_expired,
8669 .recover_lock = nfs41_lock_expired,
4d643d1d 8670 .establish_clid = nfs41_init_clientid,
1da177e4 8671};
591d71cb 8672#endif /* CONFIG_NFS_V4_1 */
1da177e4 8673
17280175 8674static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8675 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8676 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8677 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8678};
8679
8680#if defined(CONFIG_NFS_V4_1)
17280175 8681static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8682 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8683 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8684 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8685};
8686#endif
8687
ec011fe8 8688static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8689 .get_locations = _nfs40_proc_get_locations,
44c99933 8690 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8691};
8692
8693#if defined(CONFIG_NFS_V4_1)
8694static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8695 .get_locations = _nfs41_proc_get_locations,
44c99933 8696 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8697};
8698#endif /* CONFIG_NFS_V4_1 */
8699
97dc1359
TM		 8700static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8701 .minor_version = 0,
39c6daae
TM		 8702 .init_caps = NFS_CAP_READDIRPLUS
8703 | NFS_CAP_ATOMIC_OPEN
39c6daae 8704 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8705 .init_client = nfs40_init_client,
8706 .shutdown_client = nfs40_shutdown_client,
36281caa 8707 .match_stateid = nfs4_match_stateid,
fca78d6d 8708 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8709 .free_lock_state = nfs4_release_lockowner,
63f5f796 8710 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8711 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8712 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8713 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8714 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8715 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8716};
8717
8718#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8719static struct nfs_seqid *
8720nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8721{
8722 return NULL;
8723}
8724
97dc1359
TM		 8725static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8726 .minor_version = 1,
39c6daae
TM		 8727 .init_caps = NFS_CAP_READDIRPLUS
8728 | NFS_CAP_ATOMIC_OPEN
3b66486c 8729 | NFS_CAP_POSIX_LOCK
49f9a0fa 8730 | NFS_CAP_STATEID_NFSV41
e983120e 8731 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8732 .init_client = nfs41_init_client,
8733 .shutdown_client = nfs41_shutdown_client,
36281caa 8734 .match_stateid = nfs41_match_stateid,
fca78d6d 8735 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8736 .free_lock_state = nfs41_free_lock_state,
63f5f796 8737 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8738 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8739 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8740 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8741 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8742 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8743};
8744#endif
8745
42c2c424
SD		 8746#if defined(CONFIG_NFS_V4_2)
8747static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8748 .minor_version = 2,
7017310a
BS		 8749 .init_caps = NFS_CAP_READDIRPLUS
8750 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8751 | NFS_CAP_POSIX_LOCK
8752 | NFS_CAP_STATEID_NFSV41
e983120e 8753 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8754 | NFS_CAP_ALLOCATE
624bd5b7 8755 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8756 | NFS_CAP_SEEK
8757 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8758 .init_client = nfs41_init_client,
8759 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8760 .match_stateid = nfs41_match_stateid,
8761 .find_root_sec = nfs41_find_root_sec,
7017310a 8762 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8763 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8764 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8765 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8766 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8767 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8768 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8769};
8770#endif
8771
97dc1359
TM		 8772const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8773 [0] = &nfs_v4_0_minor_ops,
8774#if defined(CONFIG_NFS_V4_1)
8775 [1] = &nfs_v4_1_minor_ops,
8776#endif
42c2c424
SD		 8777#if defined(CONFIG_NFS_V4_2)
8778 [2] = &nfs_v4_2_minor_ops,
8779#endif
97dc1359
TM		 8780};
8781
17f26b12 8782static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8783 .create = nfs_create,
8784 .lookup = nfs_lookup,
8785 .atomic_open = nfs_atomic_open,
8786 .link = nfs_link,
8787 .unlink = nfs_unlink,
8788 .symlink = nfs_symlink,
8789 .mkdir = nfs_mkdir,
8790 .rmdir = nfs_rmdir,
8791 .mknod = nfs_mknod,
8792 .rename = nfs_rename,
8793 .permission = nfs_permission,
8794 .getattr = nfs_getattr,
8795 .setattr = nfs_setattr,
8796 .getxattr = generic_getxattr,
8797 .setxattr = generic_setxattr,
8798 .listxattr = generic_listxattr,
8799 .removexattr = generic_removexattr,
8800};
8801
92e1d5be 8802static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8803 .permission = nfs_permission,
8804 .getattr = nfs_getattr,
8805 .setattr = nfs_setattr,
64c2ce8b
AK		 8806 .getxattr = generic_getxattr,
8807 .setxattr = generic_setxattr,
8808 .listxattr = generic_listxattr,
8809 .removexattr = generic_removexattr,
6b3b5496
BF		 8810};
8811
509de811 8812const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8813 .version = 4, /* protocol version */
8814 .dentry_ops = &nfs4_dentry_operations,
8815 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8816 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8817 .file_ops = &nfs4_file_operations,
1da177e4 8818 .getroot = nfs4_proc_get_root,
281cad46 8819 .submount = nfs4_submount,
ff9099f2 8820 .try_mount = nfs4_try_mount,
1da177e4
LT		 8821 .getattr = nfs4_proc_getattr,
8822 .setattr = nfs4_proc_setattr,
8823 .lookup = nfs4_proc_lookup,
8824 .access = nfs4_proc_access,
8825 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8826 .create = nfs4_proc_create,
8827 .remove = nfs4_proc_remove,
8828 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8829 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8830 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8831 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8832 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8833 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8834 .link = nfs4_proc_link,
8835 .symlink = nfs4_proc_symlink,
8836 .mkdir = nfs4_proc_mkdir,
8837 .rmdir = nfs4_proc_remove,
8838 .readdir = nfs4_proc_readdir,
8839 .mknod = nfs4_proc_mknod,
8840 .statfs = nfs4_proc_statfs,
8841 .fsinfo = nfs4_proc_fsinfo,
8842 .pathconf = nfs4_proc_pathconf,
e9326dca 8843 .set_capabilities = nfs4_server_capabilities,
1da177e4 8844 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8845 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8846 .read_setup = nfs4_proc_read_setup,
ec06c096 8847 .read_done = nfs4_read_done,
1da177e4 8848 .write_setup = nfs4_proc_write_setup,
788e7a89 8849 .write_done = nfs4_write_done,
1da177e4 8850 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8851 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8852 .commit_done = nfs4_commit_done,
1da177e4 8853 .lock = nfs4_proc_lock,
e50a1c2e 8854 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8855 .close_context = nfs4_close_context,
2b484297 8856 .open_context = nfs4_atomic_open,
011e2a7f 8857 .have_delegation = nfs4_have_delegation,
57ec14c5 8858 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8859 .alloc_client = nfs4_alloc_client,
45a52a02 8860 .init_client = nfs4_init_client,
cdb7eced 8861 .free_client = nfs4_free_client,
1179acc6
BS		 8862 .create_server = nfs4_create_server,
8863 .clone_server = nfs_clone_server,
1da177e4
LT		 8864};
8865
64c2ce8b
AK		 8866static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8867 .prefix = XATTR_NAME_NFSV4_ACL,
8868 .list = nfs4_xattr_list_nfs4_acl,
8869 .get = nfs4_xattr_get_nfs4_acl,
8870 .set = nfs4_xattr_set_nfs4_acl,
8871};
8872
8873const struct xattr_handler *nfs4_xattr_handlers[] = {
8874 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8875#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8876 &nfs4_xattr_nfs4_label_handler,
8877#endif
64c2ce8b
AK		 8878 NULL
8879};
8880
1da177e4
LT		 8881/*
8882 * Local variables:
8883 * c-basic-offset: 8
8884 * End:
8885 */
Linux 6.x block layer and io_uring tree(s)