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NFSv4: Update the delay statistics counter for synchronous delays
[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 415 case -NFS4ERR_DELAY:
2598ed34
TM		 416 nfs_inc_server_stats(server, NFSIOS_DELAY);
417 case -NFS4ERR_GRACE:
b3c2aa07
TM		 418 exception->delay = 1;
419 return 0;
420
a8a4ae3a 421 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
b064eca2
TM		 424 break;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
433 "uid/gids. "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
436 }
65de872e
TM		 437 }
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
0400a6b0 440wait_on_recovery:
b3c2aa07
TM		 441 exception->recovering = 1;
442 return 0;
443}
444
445/* This is the error handling routine for processes that are allowed
446 * to sleep.
447 */
448int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
449{
450 struct nfs_client *clp = server->nfs_client;
451 int ret;
452
453 ret = nfs4_do_handle_exception(server, errorcode, exception);
454 if (exception->delay) {
455 ret = nfs4_delay(server->client, &exception->timeout);
456 goto out_retry;
457 }
458 if (exception->recovering) {
459 ret = nfs4_wait_clnt_recover(clp);
460 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
461 return -EIO;
462 goto out_retry;
463 }
464 return ret;
465out_retry:
a2c0b9e2
TM		 466 if (ret == 0)
467 exception->retry = 1;
468 return ret;
65de872e
TM		 469}
470
a5250def
WAA		 471/*
472 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
473 * or 'false' otherwise.
474 */
475static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
476{
477 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
478
479 if (flavor == RPC_AUTH_GSS_KRB5I ||
480 flavor == RPC_AUTH_GSS_KRB5P)
481 return true;
482
483 return false;
484}
65de872e 485
452e9352 486static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 487{
1da177e4
LT		 488 spin_lock(&clp->cl_lock);
489 if (time_before(clp->cl_last_renewal,timestamp))
490 clp->cl_last_renewal = timestamp;
491 spin_unlock(&clp->cl_lock);
492}
493
452e9352
TM		 494static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
495{
be824167
TM		 496 struct nfs_client *clp = server->nfs_client;
497
498 if (!nfs4_has_session(clp))
499 do_renew_lease(clp, timestamp);
452e9352
TM		 500}
501
2a3eb2b9
CL		 502struct nfs4_call_sync_data {
503 const struct nfs_server *seq_server;
504 struct nfs4_sequence_args *seq_args;
505 struct nfs4_sequence_res *seq_res;
506};
507
be3a5d23
TM		 508void nfs4_init_sequence(struct nfs4_sequence_args *args,
509 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 510{
511 args->sa_slot = NULL;
512 args->sa_cache_this = cache_reply;
513 args->sa_privileged = 0;
514
515 res->sr_slot = NULL;
516}
517
518static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
519{
520 args->sa_privileged = 1;
521}
522
cb04ad2a
PT		 523int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
524 struct nfs4_sequence_args *args,
525 struct nfs4_sequence_res *res,
526 struct rpc_task *task)
3bd2384a 527{
3bd2384a
CL		 528 struct nfs4_slot *slot;
529
530 /* slot already allocated? */
531 if (res->sr_slot != NULL)
532 goto out_start;
533
534 spin_lock(&tbl->slot_tbl_lock);
535 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
536 goto out_sleep;
537
538 slot = nfs4_alloc_slot(tbl);
539 if (IS_ERR(slot)) {
540 if (slot == ERR_PTR(-ENOMEM))
541 task->tk_timeout = HZ >> 2;
542 goto out_sleep;
543 }
544 spin_unlock(&tbl->slot_tbl_lock);
545
546 args->sa_slot = slot;
547 res->sr_slot = slot;
548
549out_start:
550 rpc_call_start(task);
551 return 0;
552
553out_sleep:
554 if (args->sa_privileged)
555 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
556 NULL, RPC_PRIORITY_PRIVILEGED);
557 else
558 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
559 spin_unlock(&tbl->slot_tbl_lock);
560 return -EAGAIN;
561}
cb04ad2a 562EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 563
564static int nfs40_sequence_done(struct rpc_task *task,
565 struct nfs4_sequence_res *res)
566{
567 struct nfs4_slot *slot = res->sr_slot;
568 struct nfs4_slot_table *tbl;
569
cab92c19 570 if (slot == NULL)
3bd2384a
CL		 571 goto out;
572
573 tbl = slot->table;
574 spin_lock(&tbl->slot_tbl_lock);
575 if (!nfs41_wake_and_assign_slot(tbl, slot))
576 nfs4_free_slot(tbl, slot);
577 spin_unlock(&tbl->slot_tbl_lock);
578
579 res->sr_slot = NULL;
580out:
581 return 1;
582}
583
cccef3b9
AA		 584#if defined(CONFIG_NFS_V4_1)
585
d185a334 586static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 587{
e3725ec0 588 struct nfs4_session *session;
13615871 589 struct nfs4_slot_table *tbl;
a13ce7c6 590 struct nfs4_slot *slot = res->sr_slot;
c10e4498 591 bool send_new_highest_used_slotid = false;
13615871 592
a13ce7c6 593 tbl = slot->table;
e3725ec0 594 session = tbl->session;
ea028ac9 595
35dc1d74 596 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 597 /* Be nice to the server: try to ensure that the last transmitted
598 * value for highest_user_slotid <= target_highest_slotid
599 */
600 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
601 send_new_highest_used_slotid = true;
602
a13ce7c6 603 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 604 send_new_highest_used_slotid = false;
605 goto out_unlock;
606 }
a13ce7c6 607 nfs4_free_slot(tbl, slot);
c10e4498
TM		 608
609 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
610 send_new_highest_used_slotid = false;
b75ad4cd 611out_unlock:
35dc1d74 612 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 613 res->sr_slot = NULL;
c10e4498 614 if (send_new_highest_used_slotid)
3f10a6af 615 nfs41_notify_server(session->clp);
13615871
AA		 616}
617
f9c96fcc 618int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 619{
e3725ec0 620 struct nfs4_session *session;
a13ce7c6 621 struct nfs4_slot *slot = res->sr_slot;
14516c3a 622 struct nfs_client *clp;
ac20d163 623 bool interrupted = false;
85563073 624 int ret = 1;
b0df806c 625
a13ce7c6
TM		 626 if (slot == NULL)
627 goto out_noaction;
468f8613
BS		 628 /* don't increment the sequence number if the task wasn't sent */
629 if (!RPC_WAS_SENT(task))
b0df806c
AA		 630 goto out;
631
e3725ec0 632 session = slot->table->session;
933602e3 633
ac20d163
TM		 634 if (slot->interrupted) {
635 slot->interrupted = 0;
636 interrupted = true;
637 }
638
2f92ae34 639 trace_nfs4_sequence_done(session, res);
691daf3b 640 /* Check the SEQUENCE operation status */
14516c3a
TM		 641 switch (res->sr_status) {
642 case 0:
b0df806c 643 /* Update the slot's sequence and clientid lease timer */
933602e3 644 ++slot->seq_nr;
e3725ec0 645 clp = session->clp;
8e63b6a8 646 do_renew_lease(clp, res->sr_timestamp);
0629e370 647 /* Check sequence flags */
b15c7cdd 648 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 649 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 650 break;
ac20d163
TM		 651 case 1:
652 /*
653 * sr_status remains 1 if an RPC level error occurred.
654 * The server may or may not have processed the sequence
655 * operation..
656 * Mark the slot as having hosted an interrupted RPC call.
657 */
658 slot->interrupted = 1;
659 goto out;
14516c3a
TM		 660 case -NFS4ERR_DELAY:
661 /* The server detected a resend of the RPC call and
662 * returned NFS4ERR_DELAY as per Section 2.10.6.2
663 * of RFC5661.
664 */
df2fabff 665 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 666 __func__,
df2fabff 667 slot->slot_nr,
933602e3 668 slot->seq_nr);
14516c3a 669 goto out_retry;
85563073
TM		 670 case -NFS4ERR_BADSLOT:
671 /*
672 * The slot id we used was probably retired. Try again
673 * using a different slot id.
674 */
e8794440
TM		 675 goto retry_nowait;
676 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 677 /*
678 * Was the last operation on this sequence interrupted?
679 * If so, retry after bumping the sequence number.
680 */
681 if (interrupted) {
682 ++slot->seq_nr;
683 goto retry_nowait;
684 }
e8794440
TM		 685 /*
686 * Could this slot have been previously retired?
687 * If so, then the server may be expecting seq_nr = 1!
688 */
8e63b6a8
TM		 689 if (slot->seq_nr != 1) {
690 slot->seq_nr = 1;
691 goto retry_nowait;
692 }
693 break;
e8794440
TM		 694 case -NFS4ERR_SEQ_FALSE_RETRY:
695 ++slot->seq_nr;
696 goto retry_nowait;
14516c3a
TM		 697 default:
698 /* Just update the slot sequence no. */
933602e3 699 ++slot->seq_nr;
b0df806c
AA		 700 }
701out:
702 /* The session may be reset by one of the error handlers. */
703 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 704 nfs41_sequence_free_slot(res);
a13ce7c6 705out_noaction:
85563073 706 return ret;
e8794440
TM		 707retry_nowait:
708 if (rpc_restart_call_prepare(task)) {
709 task->tk_status = 0;
710 ret = 0;
711 }
712 goto out;
14516c3a 713out_retry:
d05dd4e9 714 if (!rpc_restart_call(task))
14516c3a
TM		 715 goto out;
716 rpc_delay(task, NFS4_POLL_RETRY_MAX);
717 return 0;
b0df806c 718}
f9c96fcc 719EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 720
2c4b131d 721int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 722{
e3725ec0 723 if (res->sr_slot == NULL)
14516c3a 724 return 1;
3bd2384a
CL		 725 if (!res->sr_slot->table->session)
726 return nfs40_sequence_done(task, res);
14516c3a 727 return nfs41_sequence_done(task, res);
df896455 728}
2c4b131d 729EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 730
dc70d7b3 731int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 732 struct nfs4_sequence_args *args,
733 struct nfs4_sequence_res *res,
ce5039c1
AA		 734 struct rpc_task *task)
735{
fbcd4abc
AA		 736 struct nfs4_slot *slot;
737 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 738
739 dprintk("--> %s\n", __func__);
ce5039c1 740 /* slot already allocated? */
dfb4f309 741 if (res->sr_slot != NULL)
d9afbd1b 742 goto out_success;
ce5039c1 743
fbcd4abc
AA		 744 tbl = &session->fc_slot_table;
745
69d206b5
TM		 746 task->tk_timeout = 0;
747
fbcd4abc 748 spin_lock(&tbl->slot_tbl_lock);
774d5f14 749 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 750 !args->sa_privileged) {
0b1c8fc4 751 /* The state manager will wait until the slot table is empty */
0b1c8fc4 752 dprintk("%s session is draining\n", __func__);
7b939a3f 753 goto out_sleep;
689cf5c1
AB		 754 }
755
2dc03b7f 756 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 757 if (IS_ERR(slot)) {
758 /* If out of memory, try again in 1/4 second */
759 if (slot == ERR_PTR(-ENOMEM))
760 task->tk_timeout = HZ >> 2;
fbcd4abc 761 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 762 goto out_sleep;
fbcd4abc
AA		 763 }
764 spin_unlock(&tbl->slot_tbl_lock);
765
2b2fa717 766 args->sa_slot = slot;
fbcd4abc 767
e8d92382 768 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 769 slot->slot_nr, slot->seq_nr);
fbcd4abc 770
dfb4f309 771 res->sr_slot = slot;
8e63b6a8 772 res->sr_timestamp = jiffies;
2a6e26cd 773 res->sr_status_flags = 0;
fbcd4abc
AA		 774 /*
775 * sr_status is only set in decode_sequence, and so will remain
776 * set to 1 if an rpc level failure occurs.
777 */
778 res->sr_status = 1;
2f92ae34 779 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 780out_success:
781 rpc_call_start(task);
ce5039c1 782 return 0;
7b939a3f 783out_sleep:
8fe72bac
TM		 784 /* Privileged tasks are queued with top priority */
785 if (args->sa_privileged)
1e1093c7
TM		 786 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
787 NULL, RPC_PRIORITY_PRIVILEGED);
788 else
789 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 790 spin_unlock(&tbl->slot_tbl_lock);
791 return -EAGAIN;
ce5039c1 792}
dc70d7b3 793EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 794
5a580e0a
CL		 795static int nfs4_setup_sequence(const struct nfs_server *server,
796 struct nfs4_sequence_args *args,
797 struct nfs4_sequence_res *res,
798 struct rpc_task *task)
ce5039c1 799{
035168ab 800 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 801 int ret = 0;
802
3bd2384a 803 if (!session)
cb04ad2a
PT		 804 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
805 args, res, task);
035168ab 806
e8d92382 807 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 808 __func__, session->clp, session, res->sr_slot ?
e8d92382 809 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 810
9d12b216 811 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 812
ce5039c1
AA		 813 dprintk("<-- %s status=%d\n", __func__, ret);
814 return ret;
815}
816
ce5039c1
AA		 817static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
818{
2a3eb2b9 819 struct nfs4_call_sync_data *data = calldata;
6ba7db34 820 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 821
035168ab
TM		 822 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
823
d9afbd1b 824 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 825}
826
69ab40c4
AA		 827static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
828{
2a3eb2b9 829 struct nfs4_call_sync_data *data = calldata;
69ab40c4 830
14516c3a 831 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 832}
833
17280175 834static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 835 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 836 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 837};
838
3bd2384a
CL		 839#else /* !CONFIG_NFS_V4_1 */
840
9915ea7e
CL		 841static int nfs4_setup_sequence(const struct nfs_server *server,
842 struct nfs4_sequence_args *args,
843 struct nfs4_sequence_res *res,
844 struct rpc_task *task)
845{
cb04ad2a
PT		 846 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
847 args, res, task);
9915ea7e
CL		 848}
849
2c4b131d
PT		 850int nfs4_sequence_done(struct rpc_task *task,
851 struct nfs4_sequence_res *res)
9915ea7e 852{
3bd2384a 853 return nfs40_sequence_done(task, res);
9915ea7e 854}
2c4b131d 855EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 856
857#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 858
859static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
860{
861 struct nfs4_call_sync_data *data = calldata;
862 nfs4_setup_sequence(data->seq_server,
863 data->seq_args, data->seq_res, task);
864}
865
866static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
867{
868 struct nfs4_call_sync_data *data = calldata;
869 nfs4_sequence_done(task, data->seq_res);
870}
871
872static const struct rpc_call_ops nfs40_call_sync_ops = {
873 .rpc_call_prepare = nfs40_call_sync_prepare,
874 .rpc_call_done = nfs40_call_sync_done,
875};
876
7c513058
BS		 877static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
878 struct nfs_server *server,
ce5039c1
AA		 879 struct rpc_message *msg,
880 struct nfs4_sequence_args *args,
8fe72bac 881 struct nfs4_sequence_res *res)
ce5039c1
AA		 882{
883 int ret;
884 struct rpc_task *task;
9915ea7e 885 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 886 struct nfs4_call_sync_data data = {
035168ab 887 .seq_server = server,
ce5039c1
AA		 888 .seq_args = args,
889 .seq_res = res,
ce5039c1
AA		 890 };
891 struct rpc_task_setup task_setup = {
7c513058 892 .rpc_client = clnt,
ce5039c1 893 .rpc_message = msg,
9915ea7e 894 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 895 .callback_data = &data
896 };
897
ce5039c1
AA		 898 task = rpc_run_task(&task_setup);
899 if (IS_ERR(task))
900 ret = PTR_ERR(task);
901 else {
902 ret = task->tk_status;
903 rpc_put_task(task);
904 }
905 return ret;
906}
907
7c513058
BS		 908int nfs4_call_sync(struct rpc_clnt *clnt,
909 struct nfs_server *server,
e73b83f2
BS		 910 struct rpc_message *msg,
911 struct nfs4_sequence_args *args,
912 struct nfs4_sequence_res *res,
913 int cache_reply)
914{
a9c92d6b 915 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 916 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 917}
cccef3b9 918
38478b24 919static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 920{
38478b24 921 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 922
38478b24 923 spin_lock(&dir->i_lock);
359d7d1c 924 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 925 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 926 nfs_force_lookup_revalidate(dir);
a9a4a87a 927 dir->i_version = cinfo->after;
3235b403 928 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 929 nfs_fscache_invalidate(dir);
38478b24 930 spin_unlock(&dir->i_lock);
1da177e4
LT		 931}
932
e56e0b78 933struct nfs4_opendata {
c6d00e63 934 struct kref kref;
e56e0b78
TM		 935 struct nfs_openargs o_arg;
936 struct nfs_openres o_res;
cdd4e68b
TM		 937 struct nfs_open_confirmargs c_arg;
938 struct nfs_open_confirmres c_res;
6926afd1
TM		 939 struct nfs4_string owner_name;
940 struct nfs4_string group_name;
a49c2691 941 struct nfs4_label *a_label;
e56e0b78 942 struct nfs_fattr f_attr;
1775fd3e 943 struct nfs4_label *f_label;
e56e0b78 944 struct dentry *dir;
82a2c1b7 945 struct dentry *dentry;
e56e0b78 946 struct nfs4_state_owner *owner;
aac00a8d 947 struct nfs4_state *state;
e56e0b78 948 struct iattr attrs;
26e976a8 949 unsigned long timestamp;
3e309914 950 unsigned int rpc_done : 1;
5bc2afc2 951 unsigned int file_created : 1;
bdeca1b7 952 unsigned int is_recover : 1;
24ac23ab
TM		 953 int rpc_status;
954 int cancelled;
e56e0b78
TM		 955};
956
49f9a0fa
TM		 957static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
958 int err, struct nfs4_exception *exception)
959{
960 if (err != -EINVAL)
961 return false;
962 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
963 return false;
964 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
965 exception->retry = 1;
966 return true;
967}
968
6ae37339
TM		 969static u32
970nfs4_map_atomic_open_share(struct nfs_server *server,
971 fmode_t fmode, int openflags)
972{
973 u32 res = 0;
974
975 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
976 case FMODE_READ:
977 res = NFS4_SHARE_ACCESS_READ;
978 break;
979 case FMODE_WRITE:
980 res = NFS4_SHARE_ACCESS_WRITE;
981 break;
982 case FMODE_READ|FMODE_WRITE:
983 res = NFS4_SHARE_ACCESS_BOTH;
984 }
985 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
986 goto out;
987 /* Want no delegation if we're using O_DIRECT */
988 if (openflags & O_DIRECT)
989 res |= NFS4_SHARE_WANT_NO_DELEG;
990out:
991 return res;
992}
993
49f9a0fa
TM		 994static enum open_claim_type4
995nfs4_map_atomic_open_claim(struct nfs_server *server,
996 enum open_claim_type4 claim)
997{
998 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
999 return claim;
1000 switch (claim) {
1001 default:
1002 return claim;
1003 case NFS4_OPEN_CLAIM_FH:
1004 return NFS4_OPEN_CLAIM_NULL;
1005 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1006 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1007 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1008 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1009 }
1010}
2ced46c2
TM		 1011
1012static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1013{
1014 p->o_res.f_attr = &p->f_attr;
1775fd3e 1015 p->o_res.f_label = p->f_label;
c1d51931
TM		 1016 p->o_res.seqid = p->o_arg.seqid;
1017 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1018 p->o_res.server = p->o_arg.server;
5f657530 1019 p->o_res.access_request = p->o_arg.access;
2ced46c2 1020 nfs_fattr_init(&p->f_attr);
6926afd1 1021 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1022}
1023
82a2c1b7 1024static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1025 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1026 const struct iattr *attrs,
1775fd3e 1027 struct nfs4_label *label,
4a1c0893 1028 enum open_claim_type4 claim,
8535b2be 1029 gfp_t gfp_mask)
e56e0b78 1030{
82a2c1b7 1031 struct dentry *parent = dget_parent(dentry);
2b0143b5 1032 struct inode *dir = d_inode(parent);
e56e0b78 1033 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1034 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1035 struct nfs4_opendata *p;
1036
8535b2be 1037 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1038 if (p == NULL)
1039 goto err;
14c43f76
DQ		 1040
1041 p->f_label = nfs4_label_alloc(server, gfp_mask);
1042 if (IS_ERR(p->f_label))
1043 goto err_free_p;
1044
a49c2691
KM		 1045 p->a_label = nfs4_label_alloc(server, gfp_mask);
1046 if (IS_ERR(p->a_label))
1047 goto err_free_f;
1048
63f5f796
TM		 1049 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1050 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1051 if (IS_ERR(p->o_arg.seqid))
14c43f76 1052 goto err_free_label;
82a2c1b7
AV		 1053 nfs_sb_active(dentry->d_sb);
1054 p->dentry = dget(dentry);
e56e0b78
TM		 1055 p->dir = parent;
1056 p->owner = sp;
1057 atomic_inc(&sp->so_count);
dc0b027d
TM		 1058 p->o_arg.open_flags = flags;
1059 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1060 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1061 fmode, flags);
ae2bb032
WAA		 1062 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1063 * will return permission denied for all bits until close */
1064 if (!(flags & O_EXCL)) {
1065 /* ask server to check for all possible rights as results
1066 * are cached */
1067 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1068 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1069 }
7539bbab 1070 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1071 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1072 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1073 p->o_arg.name = &dentry->d_name;
e56e0b78 1074 p->o_arg.server = server;
aa9c2669 1075 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1076 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1077 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1078 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1079 switch (p->o_arg.claim) {
4a1c0893
TM		 1080 case NFS4_OPEN_CLAIM_NULL:
1081 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1082 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1083 p->o_arg.fh = NFS_FH(dir);
1084 break;
1085 case NFS4_OPEN_CLAIM_PREVIOUS:
1086 case NFS4_OPEN_CLAIM_FH:
1087 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1088 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1089 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1090 }
536e43d1 1091 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1092 __u32 verf[2];
d77d76ff 1093
e56e0b78
TM		 1094 p->o_arg.u.attrs = &p->attrs;
1095 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1096
1097 verf[0] = jiffies;
1098 verf[1] = current->pid;
1099 memcpy(p->o_arg.u.verifier.data, verf,
1100 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1101 }
cdd4e68b
TM		 1102 p->c_arg.fh = &p->o_res.fh;
1103 p->c_arg.stateid = &p->o_res.stateid;
1104 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1105 nfs4_init_opendata_res(p);
c6d00e63 1106 kref_init(&p->kref);
e56e0b78 1107 return p;
14c43f76
DQ		 1108
1109err_free_label:
a49c2691
KM		 1110 nfs4_label_free(p->a_label);
1111err_free_f:
14c43f76
DQ		 1112 nfs4_label_free(p->f_label);
1113err_free_p:
e56e0b78
TM		 1114 kfree(p);
1115err:
1116 dput(parent);
1117 return NULL;
1118}
1119
c6d00e63 1120static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1121{
c6d00e63
TM		 1122 struct nfs4_opendata *p = container_of(kref,
1123 struct nfs4_opendata, kref);
82a2c1b7 1124 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1125
1126 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1127 if (p->state != NULL)
1128 nfs4_put_open_state(p->state);
c6d00e63 1129 nfs4_put_state_owner(p->owner);
14c43f76 1130
a49c2691 1131 nfs4_label_free(p->a_label);
14c43f76
DQ		 1132 nfs4_label_free(p->f_label);
1133
c6d00e63 1134 dput(p->dir);
82a2c1b7
AV		 1135 dput(p->dentry);
1136 nfs_sb_deactive(sb);
6926afd1 1137 nfs_fattr_free_names(&p->f_attr);
e911b815 1138 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1139 kfree(p);
1140}
1141
1142static void nfs4_opendata_put(struct nfs4_opendata *p)
1143{
1144 if (p != NULL)
1145 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1146}
1147
06f814a3
TM		 1148static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1149{
06f814a3
TM		 1150 int ret;
1151
06f814a3 1152 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1153 return ret;
1154}
1155
24311f88
TM		 1156static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1157 fmode_t fmode)
1158{
1159 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1160 case FMODE_READ|FMODE_WRITE:
1161 return state->n_rdwr != 0;
1162 case FMODE_WRITE:
1163 return state->n_wronly != 0;
1164 case FMODE_READ:
1165 return state->n_rdonly != 0;
1166 }
1167 WARN_ON_ONCE(1);
1168 return false;
1169}
1170
dc0b027d 1171static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1172{
1173 int ret = 0;
dc0b027d 1174
536e43d1 1175 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1176 goto out;
1177 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1178 case FMODE_READ:
88069f77
TM		 1179 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1180 && state->n_rdonly != 0;
6ee41268
TM		 1181 break;
1182 case FMODE_WRITE:
88069f77
TM		 1183 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1184 && state->n_wronly != 0;
6ee41268
TM		 1185 break;
1186 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1187 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1188 && state->n_rdwr != 0;
6ee41268 1189 }
dc0b027d 1190out:
6ee41268
TM		 1191 return ret;
1192}
1193
2a606188
TM		 1194static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1195 enum open_claim_type4 claim)
aac00a8d 1196{
652f89f6
TM		 1197 if (delegation == NULL)
1198 return 0;
dc0b027d 1199 if ((delegation->type & fmode) != fmode)
aac00a8d 1200 return 0;
d25be546
TM		 1201 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1202 return 0;
2a606188
TM		 1203 switch (claim) {
1204 case NFS4_OPEN_CLAIM_NULL:
1205 case NFS4_OPEN_CLAIM_FH:
1206 break;
1207 case NFS4_OPEN_CLAIM_PREVIOUS:
1208 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1209 break;
1210 default:
1211 return 0;
1212 }
b7391f44 1213 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1214 return 1;
1215}
1216
dc0b027d 1217static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1218{
dc0b027d 1219 switch (fmode) {
e7616923
TM		 1220 case FMODE_WRITE:
1221 state->n_wronly++;
1222 break;
1223 case FMODE_READ:
1224 state->n_rdonly++;
1225 break;
1226 case FMODE_READ|FMODE_WRITE:
1227 state->n_rdwr++;
1228 }
dc0b027d 1229 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1230}
1231
4f14c194
TM		 1232static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1233{
1234 struct nfs_client *clp = state->owner->so_server->nfs_client;
1235 bool need_recover = false;
1236
1237 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1238 need_recover = true;
1239 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1240 need_recover = true;
1241 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1242 need_recover = true;
1243 if (need_recover)
1244 nfs4_state_mark_reclaim_nograce(clp, state);
1245}
1246
e999e80e
TM		 1247static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1248 nfs4_stateid *stateid)
1249{
1250 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1251 return true;
4f14c194
TM		 1252 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1253 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1254 return true;
4f14c194 1255 }
e999e80e
TM		 1256 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1257 return true;
1258 return false;
1259}
1260
f95549cf
TM		 1261static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1262{
3c38cbe2
TM		 1263 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1264 return;
f95549cf
TM		 1265 if (state->n_wronly)
1266 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1267 if (state->n_rdonly)
1268 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1269 if (state->n_rdwr)
1270 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1271 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1272}
1273
226056c5 1274static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1275 nfs4_stateid *arg_stateid,
226056c5 1276 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1277{
226056c5
TM		 1278 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1279 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1280 case FMODE_WRITE:
1281 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1282 break;
1283 case FMODE_READ:
1284 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1285 break;
1286 case 0:
1287 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1288 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1289 clear_bit(NFS_OPEN_STATE, &state->flags);
1290 }
1291 if (stateid == NULL)
1292 return;
f95549cf 1293 /* Handle races with OPEN */
4a1e2feb
TM		 1294 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1295 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1296 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1297 nfs_resync_open_stateid_locked(state);
226056c5 1298 return;
f95549cf 1299 }
003707c7 1300 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1301 nfs4_stateid_copy(&state->stateid, stateid);
1302 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1303}
1304
4a1e2feb
TM		 1305static void nfs_clear_open_stateid(struct nfs4_state *state,
1306 nfs4_stateid *arg_stateid,
1307 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1308{
1309 write_seqlock(&state->seqlock);
4a1e2feb 1310 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1311 write_sequnlock(&state->seqlock);
4f14c194
TM		 1312 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1313 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1314}
1315
dc0b027d 1316static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1317{
dc0b027d 1318 switch (fmode) {
003707c7
TM		 1319 case FMODE_READ:
1320 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1321 break;
1322 case FMODE_WRITE:
1323 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1324 break;
1325 case FMODE_READ|FMODE_WRITE:
1326 set_bit(NFS_O_RDWR_STATE, &state->flags);
1327 }
e999e80e
TM		 1328 if (!nfs_need_update_open_stateid(state, stateid))
1329 return;
1330 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1331 nfs4_stateid_copy(&state->stateid, stateid);
1332 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1333}
1334
dc0b027d 1335static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1336{
8bda4e4c
TM		 1337 /*
1338 * Protect the call to nfs4_state_set_mode_locked and
1339 * serialise the stateid update
1340 */
1341 write_seqlock(&state->seqlock);
003707c7 1342 if (deleg_stateid != NULL) {
f597c537 1343 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1344 set_bit(NFS_DELEGATED_STATE, &state->flags);
1345 }
1346 if (open_stateid != NULL)
dc0b027d 1347 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1348 write_sequnlock(&state->seqlock);
1349 spin_lock(&state->owner->so_lock);
dc0b027d 1350 update_open_stateflags(state, fmode);
ec073428 1351 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1352}
1353
dc0b027d 1354static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1355{
1356 struct nfs_inode *nfsi = NFS_I(state->inode);
1357 struct nfs_delegation *deleg_cur;
1358 int ret = 0;
1359
dc0b027d 1360 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1361
1362 rcu_read_lock();
1363 deleg_cur = rcu_dereference(nfsi->delegation);
1364 if (deleg_cur == NULL)
1365 goto no_delegation;
1366
1367 spin_lock(&deleg_cur->lock);
17f26b12 1368 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1369 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1370 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1371 goto no_delegation_unlock;
1372
1373 if (delegation == NULL)
1374 delegation = &deleg_cur->stateid;
f597c537 1375 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1376 goto no_delegation_unlock;
1377
b7391f44 1378 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1379 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1380 ret = 1;
1381no_delegation_unlock:
1382 spin_unlock(&deleg_cur->lock);
1383no_delegation:
1384 rcu_read_unlock();
1385
1386 if (!ret && open_stateid != NULL) {
dc0b027d 1387 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1388 ret = 1;
1389 }
4f14c194
TM		 1390 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1391 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1392
1393 return ret;
1394}
1395
39071e6f
TM		 1396static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1397 const nfs4_stateid *stateid)
1398{
1399 struct nfs4_state *state = lsp->ls_state;
1400 bool ret = false;
1401
1402 spin_lock(&state->state_lock);
1403 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1404 goto out_noupdate;
1405 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1406 goto out_noupdate;
1407 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1408 ret = true;
1409out_noupdate:
1410 spin_unlock(&state->state_lock);
1411 return ret;
1412}
34310430 1413
dc0b027d 1414static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1415{
1416 struct nfs_delegation *delegation;
1417
1418 rcu_read_lock();
1419 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1420 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1421 rcu_read_unlock();
1422 return;
1423 }
1424 rcu_read_unlock();
57ec14c5 1425 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1426}
1427
6ee41268 1428static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1429{
1430 struct nfs4_state *state = opendata->state;
1431 struct nfs_inode *nfsi = NFS_I(state->inode);
1432 struct nfs_delegation *delegation;
f448badd 1433 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1434 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1435 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1436 nfs4_stateid stateid;
1437 int ret = -EAGAIN;
1438
aac00a8d 1439 for (;;) {
61beef75 1440 spin_lock(&state->owner->so_lock);
dc0b027d 1441 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1442 update_open_stateflags(state, fmode);
6ee41268 1443 spin_unlock(&state->owner->so_lock);
61beef75 1444 goto out_return_state;
6ee41268 1445 }
61beef75 1446 spin_unlock(&state->owner->so_lock);
34310430
TM		 1447 rcu_read_lock();
1448 delegation = rcu_dereference(nfsi->delegation);
2a606188 1449 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1450 rcu_read_unlock();
aac00a8d 1451 break;
34310430 1452 }
aac00a8d 1453 /* Save the delegation */
f597c537 1454 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1455 rcu_read_unlock();
fa332941 1456 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1457 if (!opendata->is_recover) {
1458 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1459 if (ret != 0)
1460 goto out;
1461 }
aac00a8d 1462 ret = -EAGAIN;
34310430
TM		 1463
1464 /* Try to update the stateid using the delegation */
dc0b027d 1465 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1466 goto out_return_state;
aac00a8d 1467 }
aac00a8d
TM		 1468out:
1469 return ERR_PTR(ret);
1470out_return_state:
1471 atomic_inc(&state->count);
1472 return state;
1473}
1474
e23008ec
AA		 1475static void
1476nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1477{
1478 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1479 struct nfs_delegation *delegation;
1480 int delegation_flags = 0;
1481
1482 rcu_read_lock();
1483 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1484 if (delegation)
1485 delegation_flags = delegation->flags;
1486 rcu_read_unlock();
72d79ff8
TM		 1487 switch (data->o_arg.claim) {
1488 default:
1489 break;
1490 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1491 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1492 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1493 "returning a delegation for "
1494 "OPEN(CLAIM_DELEGATE_CUR)\n",
1495 clp->cl_hostname);
72d79ff8
TM		 1496 return;
1497 }
1498 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1499 nfs_inode_set_delegation(state->inode,
1500 data->owner->so_cred,
1501 &data->o_res);
1502 else
1503 nfs_inode_reclaim_delegation(state->inode,
1504 data->owner->so_cred,
1505 &data->o_res);
1506}
1507
1508/*
1509 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1510 * and update the nfs4_state.
1511 */
1512static struct nfs4_state *
1513_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1514{
1515 struct inode *inode = data->state->inode;
1516 struct nfs4_state *state = data->state;
1517 int ret;
1518
d2bfda2e
WAA		 1519 if (!data->rpc_done) {
1520 if (data->rpc_status) {
1521 ret = data->rpc_status;
1522 goto err;
1523 }
1524 /* cached opens have already been processed */
1525 goto update;
e23008ec
AA		 1526 }
1527
e23008ec
AA		 1528 ret = nfs_refresh_inode(inode, &data->f_attr);
1529 if (ret)
1530 goto err;
1531
1532 if (data->o_res.delegation_type != 0)
1533 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1534update:
e23008ec
AA		 1535 update_open_stateid(state, &data->o_res.stateid, NULL,
1536 data->o_arg.fmode);
d49f042a 1537 atomic_inc(&state->count);
e23008ec
AA		 1538
1539 return state;
1540err:
1541 return ERR_PTR(ret);
1542
1543}
1544
1545static struct nfs4_state *
1546_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1547{
1548 struct inode *inode;
1549 struct nfs4_state *state = NULL;
1b370bc2 1550 int ret;
24ac23ab 1551
aac00a8d 1552 if (!data->rpc_done) {
6ee41268 1553 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1554 goto out;
1555 }
1556
1b370bc2 1557 ret = -EAGAIN;
24ac23ab 1558 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1559 goto err;
1775fd3e 1560 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1561 ret = PTR_ERR(inode);
03f28e3a 1562 if (IS_ERR(inode))
1b370bc2
TM		 1563 goto err;
1564 ret = -ENOMEM;
24ac23ab
TM		 1565 state = nfs4_get_open_state(inode, data->owner);
1566 if (state == NULL)
1b370bc2 1567 goto err_put_inode;
e23008ec
AA		 1568 if (data->o_res.delegation_type != 0)
1569 nfs4_opendata_check_deleg(data, state);
34310430 1570 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1571 data->o_arg.fmode);
24ac23ab 1572 iput(inode);
aac00a8d 1573out:
7aa262b5 1574 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1575 return state;
1b370bc2
TM		 1576err_put_inode:
1577 iput(inode);
1578err:
1579 return ERR_PTR(ret);
24ac23ab
TM		 1580}
1581
e23008ec
AA		 1582static struct nfs4_state *
1583nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1584{
1585 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1586 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1587 return _nfs4_opendata_to_nfs4_state(data);
1588}
1589
864472e9
TM		 1590static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1591{
1592 struct nfs_inode *nfsi = NFS_I(state->inode);
1593 struct nfs_open_context *ctx;
1594
1595 spin_lock(&state->inode->i_lock);
1596 list_for_each_entry(ctx, &nfsi->open_files, list) {
1597 if (ctx->state != state)
1598 continue;
1599 get_nfs_open_context(ctx);
1600 spin_unlock(&state->inode->i_lock);
1601 return ctx;
1602 }
1603 spin_unlock(&state->inode->i_lock);
1604 return ERR_PTR(-ENOENT);
1605}
1606
4a1c0893
TM		 1607static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1608 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1609{
1610 struct nfs4_opendata *opendata;
1611
4a1c0893 1612 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1613 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1614 if (opendata == NULL)
1615 return ERR_PTR(-ENOMEM);
1616 opendata->state = state;
1617 atomic_inc(&state->count);
1618 return opendata;
1619}
1620
24311f88
TM		 1621static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1622 fmode_t fmode)
864472e9 1623{
2ced46c2 1624 struct nfs4_state *newstate;
864472e9
TM		 1625 int ret;
1626
24311f88 1627 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1628 return 0;
dc0b027d
TM		 1629 opendata->o_arg.open_flags = 0;
1630 opendata->o_arg.fmode = fmode;
be36e185
TM		 1631 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1632 NFS_SB(opendata->dentry->d_sb),
1633 fmode, 0);
2ced46c2
TM		 1634 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1635 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1636 nfs4_init_opendata_res(opendata);
b257957e 1637 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1638 if (ret != 0)
1639 return ret;
2ced46c2 1640 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1641 if (IS_ERR(newstate))
1642 return PTR_ERR(newstate);
24311f88
TM		 1643 if (newstate != opendata->state)
1644 ret = -ESTALE;
643168c2 1645 nfs4_close_state(newstate, fmode);
24311f88 1646 return ret;
864472e9
TM		 1647}
1648
1649static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1650{
864472e9
TM		 1651 int ret;
1652
4f14c194
TM		 1653 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1654 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1655 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1656 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1657 /* memory barrier prior to reading state->n_* */
2ced46c2 1658 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1659 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1660 smp_rmb();
24311f88
TM		 1661 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1662 if (ret != 0)
1663 return ret;
1664 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1665 if (ret != 0)
1666 return ret;
1667 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1668 if (ret != 0)
1669 return ret;
1ac7e2fd
TM		 1670 /*
1671 * We may have performed cached opens for all three recoveries.
1672 * Check if we need to update the current stateid.
1673 */
1674 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1675 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1676 write_seqlock(&state->seqlock);
1ac7e2fd 1677 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1678 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1679 write_sequnlock(&state->seqlock);
1ac7e2fd 1680 }
864472e9
TM		 1681 return 0;
1682}
1683
1da177e4
LT		 1684/*
1685 * OPEN_RECLAIM:
1686 * reclaim state on the server after a reboot.
1da177e4 1687 */
539cd03a 1688static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1689{
1ac7e2fd 1690 struct nfs_delegation *delegation;
864472e9 1691 struct nfs4_opendata *opendata;
dc0b027d 1692 fmode_t delegation_type = 0;
1da177e4
LT		 1693 int status;
1694
4a1c0893
TM		 1695 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1696 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1697 if (IS_ERR(opendata))
1698 return PTR_ERR(opendata);
1ac7e2fd
TM		 1699 rcu_read_lock();
1700 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1701 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1702 delegation_type = delegation->type;
1ac7e2fd 1703 rcu_read_unlock();
864472e9
TM		 1704 opendata->o_arg.u.delegation_type = delegation_type;
1705 status = nfs4_open_recover(opendata, state);
c6d00e63 1706 nfs4_opendata_put(opendata);
1da177e4
LT		 1707 return status;
1708}
1709
539cd03a 1710static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1711{
1712 struct nfs_server *server = NFS_SERVER(state->inode);
1713 struct nfs4_exception exception = { };
1714 int err;
1715 do {
539cd03a 1716 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1717 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1718 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1719 continue;
168667c4 1720 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1721 break;
1722 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1723 } while (exception.retry);
1724 return err;
1725}
1726
864472e9
TM		 1727static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1728{
1729 struct nfs_open_context *ctx;
1730 int ret;
1731
1732 ctx = nfs4_state_find_open_context(state);
1733 if (IS_ERR(ctx))
91876b13 1734 return -EAGAIN;
539cd03a 1735 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1736 put_nfs_open_context(ctx);
1737 return ret;
1738}
1739
db4f2e63 1740static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1741{
be76b5b6
TM		 1742 switch (err) {
1743 default:
1744 printk(KERN_ERR "NFS: %s: unhandled error "
1745 "%d.\n", __func__, err);
1746 case 0:
1747 case -ENOENT:
8eee52af 1748 case -EAGAIN:
be76b5b6
TM		 1749 case -ESTALE:
1750 break;
1751 case -NFS4ERR_BADSESSION:
1752 case -NFS4ERR_BADSLOT:
1753 case -NFS4ERR_BAD_HIGH_SLOT:
1754 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1755 case -NFS4ERR_DEADSESSION:
1756 set_bit(NFS_DELEGATED_STATE, &state->flags);
1757 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1758 return -EAGAIN;
1759 case -NFS4ERR_STALE_CLIENTID:
1760 case -NFS4ERR_STALE_STATEID:
1761 set_bit(NFS_DELEGATED_STATE, &state->flags);
1762 case -NFS4ERR_EXPIRED:
1763 /* Don't recall a delegation if it was lost */
1764 nfs4_schedule_lease_recovery(server->nfs_client);
1765 return -EAGAIN;
352297b9
CL		 1766 case -NFS4ERR_MOVED:
1767 nfs4_schedule_migration_recovery(server);
1768 return -EAGAIN;
8ef2f8d4
CL		 1769 case -NFS4ERR_LEASE_MOVED:
1770 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1771 return -EAGAIN;
be76b5b6
TM		 1772 case -NFS4ERR_DELEG_REVOKED:
1773 case -NFS4ERR_ADMIN_REVOKED:
1774 case -NFS4ERR_BAD_STATEID:
db4f2e63 1775 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1776 nfs_inode_find_state_and_recover(state->inode,
1777 stateid);
1778 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1779 return -EAGAIN;
be76b5b6
TM		 1780 case -NFS4ERR_DELAY:
1781 case -NFS4ERR_GRACE:
1782 set_bit(NFS_DELEGATED_STATE, &state->flags);
1783 ssleep(1);
1784 return -EAGAIN;
db4f2e63
TM		 1785 case -ENOMEM:
1786 case -NFS4ERR_DENIED:
1787 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1788 return 0;
be76b5b6 1789 }
1da177e4
LT		 1790 return err;
1791}
1792
24311f88
TM		 1793int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1794 struct nfs4_state *state, const nfs4_stateid *stateid,
1795 fmode_t type)
db4f2e63
TM		 1796{
1797 struct nfs_server *server = NFS_SERVER(state->inode);
1798 struct nfs4_opendata *opendata;
24311f88 1799 int err = 0;
db4f2e63
TM		 1800
1801 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1802 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1803 if (IS_ERR(opendata))
1804 return PTR_ERR(opendata);
1805 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1806 write_seqlock(&state->seqlock);
1807 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1808 write_sequnlock(&state->seqlock);
24311f88
TM		 1809 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1810 switch (type & (FMODE_READ|FMODE_WRITE)) {
1811 case FMODE_READ|FMODE_WRITE:
1812 case FMODE_WRITE:
1813 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1814 if (err)
1815 break;
1816 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1817 if (err)
1818 break;
1819 case FMODE_READ:
1820 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1821 }
db4f2e63
TM		 1822 nfs4_opendata_put(opendata);
1823 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1824}
1825
be05c860
CL		 1826static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1827{
1828 struct nfs4_opendata *data = calldata;
1829
cb04ad2a
PT		 1830 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1831 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1832}
1833
cdd4e68b
TM		 1834static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1835{
1836 struct nfs4_opendata *data = calldata;
1837
17ead6c8 1838 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1839
cdd4e68b 1840 data->rpc_status = task->tk_status;
26e976a8 1841 if (data->rpc_status == 0) {
f597c537 1842 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1843 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1844 renew_lease(data->o_res.server, data->timestamp);
3e309914 1845 data->rpc_done = 1;
26e976a8 1846 }
cdd4e68b
TM		 1847}
1848
1849static void nfs4_open_confirm_release(void *calldata)
1850{
1851 struct nfs4_opendata *data = calldata;
1852 struct nfs4_state *state = NULL;
1853
1854 /* If this request hasn't been cancelled, do nothing */
1855 if (data->cancelled == 0)
1856 goto out_free;
1857 /* In case of error, no cleanup! */
3e309914 1858 if (!data->rpc_done)
cdd4e68b 1859 goto out_free;
cdd4e68b 1860 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1861 if (!IS_ERR(state))
643168c2 1862 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1863out_free:
c6d00e63 1864 nfs4_opendata_put(data);
cdd4e68b
TM		 1865}
1866
1867static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1868 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1869 .rpc_call_done = nfs4_open_confirm_done,
1870 .rpc_release = nfs4_open_confirm_release,
1871};
1872
1873/*
1874 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1875 */
1876static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1877{
2b0143b5 1878 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1879 struct rpc_task *task;
5138fde0
TM		 1880 struct rpc_message msg = {
1881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1882 .rpc_argp = &data->c_arg,
1883 .rpc_resp = &data->c_res,
1884 .rpc_cred = data->owner->so_cred,
1885 };
c970aa85
TM		 1886 struct rpc_task_setup task_setup_data = {
1887 .rpc_client = server->client,
5138fde0 1888 .rpc_message = &msg,
c970aa85
TM		 1889 .callback_ops = &nfs4_open_confirm_ops,
1890 .callback_data = data,
101070ca 1891 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1892 .flags = RPC_TASK_ASYNC,
1893 };
1da177e4
LT		 1894 int status;
1895
17ead6c8 1896 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1897 kref_get(&data->kref);
3e309914
TM		 1898 data->rpc_done = 0;
1899 data->rpc_status = 0;
5138fde0 1900 data->timestamp = jiffies;
e92c1e0d
BC		 1901 if (data->is_recover)
1902 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1903 task = rpc_run_task(&task_setup_data);
7a1218a2 1904 if (IS_ERR(task))
cdd4e68b 1905 return PTR_ERR(task);
cdd4e68b
TM		 1906 status = nfs4_wait_for_completion_rpc_task(task);
1907 if (status != 0) {
1908 data->cancelled = 1;
1909 smp_wmb();
1910 } else
1911 status = data->rpc_status;
e6b3c4db 1912 rpc_put_task(task);
1da177e4
LT		 1913 return status;
1914}
1915
24ac23ab 1916static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1917{
24ac23ab
TM		 1918 struct nfs4_opendata *data = calldata;
1919 struct nfs4_state_owner *sp = data->owner;
549b19cc 1920 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1921 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1922
24ac23ab 1923 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1924 goto out_wait;
aac00a8d
TM		 1925 /*
1926 * Check if we still need to send an OPEN call, or if we can use
1927 * a delegation instead.
1928 */
1929 if (data->state != NULL) {
1930 struct nfs_delegation *delegation;
1931
dc0b027d 1932 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1933 goto out_no_action;
aac00a8d
TM		 1934 rcu_read_lock();
1935 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1936 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1937 goto unlock_no_action;
aac00a8d
TM		 1938 rcu_read_unlock();
1939 }
95b72eb0 1940 /* Update client id. */
549b19cc 1941 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1942 switch (claim) {
1943 default:
1944 break;
8188df17
TM		 1945 case NFS4_OPEN_CLAIM_PREVIOUS:
1946 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1947 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1948 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1949 case NFS4_OPEN_CLAIM_FH:
1950 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1951 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1952 }
26e976a8 1953 data->timestamp = jiffies;
035168ab 1954 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1955 &data->o_arg.seq_args,
2240a9e2
TM		 1956 &data->o_res.seq_res,
1957 task) != 0)
1958 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1959
1960 /* Set the create mode (note dependency on the session type) */
1961 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1962 if (data->o_arg.open_flags & O_EXCL) {
1963 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1964 if (nfs4_has_persistent_session(clp))
1965 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1966 else if (clp->cl_mvops->minor_version > 0)
1967 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1968 }
6ee41268 1969 return;
652f89f6
TM		 1970unlock_no_action:
1971 rcu_read_unlock();
6ee41268
TM		 1972out_no_action:
1973 task->tk_action = NULL;
c8da19b9 1974out_wait:
b75ad4cd 1975 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1976}
1977
24ac23ab
TM		 1978static void nfs4_open_done(struct rpc_task *task, void *calldata)
1979{
1980 struct nfs4_opendata *data = calldata;
1da177e4 1981
24ac23ab 1982 data->rpc_status = task->tk_status;
d898528c 1983
14516c3a
TM		 1984 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1985 return;
d898528c 1986
24ac23ab 1987 if (task->tk_status == 0) {
807d66d8
TM		 1988 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1989 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1990 case S_IFREG:
1991 break;
1992 case S_IFLNK:
24ac23ab 1993 data->rpc_status = -ELOOP;
6f926b5b
TM		 1994 break;
1995 case S_IFDIR:
24ac23ab 1996 data->rpc_status = -EISDIR;
6f926b5b
TM		 1997 break;
1998 default:
24ac23ab 1999 data->rpc_status = -ENOTDIR;
807d66d8 2000 }
6f926b5b 2001 }
26e976a8 2002 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2003 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2004 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2005 }
3e309914 2006 data->rpc_done = 1;
24ac23ab 2007}
6f926b5b 2008
24ac23ab
TM		 2009static void nfs4_open_release(void *calldata)
2010{
2011 struct nfs4_opendata *data = calldata;
2012 struct nfs4_state *state = NULL;
2013
2014 /* If this request hasn't been cancelled, do nothing */
2015 if (data->cancelled == 0)
2016 goto out_free;
2017 /* In case of error, no cleanup! */
3e309914 2018 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2019 goto out_free;
2020 /* In case we need an open_confirm, no cleanup! */
2021 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2022 goto out_free;
24ac23ab 2023 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2024 if (!IS_ERR(state))
643168c2 2025 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2026out_free:
c6d00e63 2027 nfs4_opendata_put(data);
24ac23ab
TM		 2028}
2029
2030static const struct rpc_call_ops nfs4_open_ops = {
2031 .rpc_call_prepare = nfs4_open_prepare,
2032 .rpc_call_done = nfs4_open_done,
2033 .rpc_release = nfs4_open_release,
2034};
2035
b257957e 2036static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2037{
2b0143b5 2038 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2039 struct nfs_server *server = NFS_SERVER(dir);
2040 struct nfs_openargs *o_arg = &data->o_arg;
2041 struct nfs_openres *o_res = &data->o_res;
2042 struct rpc_task *task;
5138fde0
TM		 2043 struct rpc_message msg = {
2044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2045 .rpc_argp = o_arg,
2046 .rpc_resp = o_res,
2047 .rpc_cred = data->owner->so_cred,
2048 };
c970aa85
TM		 2049 struct rpc_task_setup task_setup_data = {
2050 .rpc_client = server->client,
5138fde0 2051 .rpc_message = &msg,
c970aa85
TM		 2052 .callback_ops = &nfs4_open_ops,
2053 .callback_data = data,
101070ca 2054 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2055 .flags = RPC_TASK_ASYNC,
2056 };
24ac23ab
TM		 2057 int status;
2058
a9c92d6b 2059 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2060 kref_get(&data->kref);
3e309914
TM		 2061 data->rpc_done = 0;
2062 data->rpc_status = 0;
2ced46c2 2063 data->cancelled = 0;
bdeca1b7
TM		 2064 data->is_recover = 0;
2065 if (isrecover) {
8fe72bac 2066 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2067 data->is_recover = 1;
2068 }
c970aa85 2069 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2070 if (IS_ERR(task))
2071 return PTR_ERR(task);
2072 status = nfs4_wait_for_completion_rpc_task(task);
2073 if (status != 0) {
2074 data->cancelled = 1;
2075 smp_wmb();
2076 } else
2077 status = data->rpc_status;
2078 rpc_put_task(task);
2079
2080 return status;
2081}
2082
2083static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2084{
2b0143b5 2085 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2086 struct nfs_openres *o_res = &data->o_res;
2087 int status;
2088
2089 status = nfs4_run_open_task(data, 1);
2090 if (status != 0 || !data->rpc_done)
2091 return status;
2092
6926afd1
TM		 2093 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2094
b257957e
AB		 2095 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2096 status = _nfs4_proc_open_confirm(data);
2097 if (status != 0)
2098 return status;
2099 }
2100
2101 return status;
2102}
2103
f3792d63
TM		 2104/*
2105 * Additional permission checks in order to distinguish between an
2106 * open for read, and an open for execute. This works around the
2107 * fact that NFSv4 OPEN treats read and execute permissions as being
2108 * the same.
2109 * Note that in the non-execute case, we want to turn off permission
2110 * checking if we just created a new file (POSIX open() semantics).
2111 */
6168f62c
WAA		 2112static int nfs4_opendata_access(struct rpc_cred *cred,
2113 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2114 struct nfs4_state *state, fmode_t fmode,
2115 int openflags)
6168f62c
WAA		 2116{
2117 struct nfs_access_entry cache;
2118 u32 mask;
2119
2120 /* access call failed or for some reason the server doesn't
2121 * support any access modes -- defer access call until later */
2122 if (opendata->o_res.access_supported == 0)
2123 return 0;
2124
2125 mask = 0;
f3792d63
TM		 2126 /*
2127 * Use openflags to check for exec, because fmode won't
2128 * always have FMODE_EXEC set when file open for exec.
2129 */
f8d9a897
WAA		 2130 if (openflags & __FMODE_EXEC) {
2131 /* ONLY check for exec rights */
2132 mask = MAY_EXEC;
f3792d63 2133 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2134 mask = MAY_READ;
6168f62c
WAA		 2135
2136 cache.cred = cred;
2137 cache.jiffies = jiffies;
2138 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2139 nfs_access_add_cache(state->inode, &cache);
2140
bbd3a8ee 2141 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2142 return 0;
2143
2144 /* even though OPEN succeeded, access is denied. Close the file */
2145 nfs4_close_state(state, fmode);
998f40b5 2146 return -EACCES;
6168f62c
WAA		 2147}
2148
b257957e
AB		 2149/*
2150 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2151 */
2152static int _nfs4_proc_open(struct nfs4_opendata *data)
2153{
2b0143b5 2154 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2155 struct nfs_server *server = NFS_SERVER(dir);
2156 struct nfs_openargs *o_arg = &data->o_arg;
2157 struct nfs_openres *o_res = &data->o_res;
2158 int status;
2159
2160 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2161 if (!data->rpc_done)
2162 return status;
2163 if (status != 0) {
2164 if (status == -NFS4ERR_BADNAME &&
2165 !(o_arg->open_flags & O_CREAT))
2166 return -ENOENT;
24ac23ab 2167 return status;
08ef7bd3 2168 }
24ac23ab 2169
6926afd1
TM		 2170 nfs_fattr_map_and_free_names(server, &data->f_attr);
2171
5bc2afc2 2172 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2173 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2174 if (o_arg->open_flags & O_EXCL)
2175 data->file_created = 1;
2176 else if (o_res->cinfo.before != o_res->cinfo.after)
2177 data->file_created = 1;
2178 }
0df5dd4a
TM		 2179 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2180 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2181 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2182 status = _nfs4_proc_open_confirm(data);
1da177e4 2183 if (status != 0)
24ac23ab 2184 return status;
1da177e4
LT		 2185 }
2186 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2187 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2188 return 0;
1da177e4
LT		 2189}
2190
d83217c1
AA		 2191static int nfs4_recover_expired_lease(struct nfs_server *server)
2192{
2193 return nfs4_client_recover_expired_lease(server->nfs_client);
2194}
2195
1da177e4
LT		 2196/*
2197 * OPEN_EXPIRED:
2198 * reclaim state on the server after a network partition.
2199 * Assumes caller holds the appropriate lock
2200 */
539cd03a 2201static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2202{
e56e0b78 2203 struct nfs4_opendata *opendata;
864472e9 2204 int ret;
1da177e4 2205
4a1c0893 2206 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2207 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2208 if (IS_ERR(opendata))
2209 return PTR_ERR(opendata);
864472e9 2210 ret = nfs4_open_recover(opendata, state);
35d05778 2211 if (ret == -ESTALE)
3d4ff43d 2212 d_drop(ctx->dentry);
c6d00e63 2213 nfs4_opendata_put(opendata);
864472e9 2214 return ret;
1da177e4
LT		 2215}
2216
a9ed2e25 2217static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2218{
539cd03a 2219 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2220 struct nfs4_exception exception = { };
2221 int err;
2222
2223 do {
539cd03a 2224 err = _nfs4_open_expired(ctx, state);
42113a75 2225 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2226 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2227 continue;
a9ed2e25
TM		 2228 switch (err) {
2229 default:
2230 goto out;
2231 case -NFS4ERR_GRACE:
2232 case -NFS4ERR_DELAY:
2233 nfs4_handle_exception(server, err, &exception);
2234 err = 0;
2235 }
202b50dc 2236 } while (exception.retry);
a9ed2e25 2237out:
202b50dc
TM		 2238 return err;
2239}
2240
1da177e4
LT		 2241static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2242{
1da177e4 2243 struct nfs_open_context *ctx;
864472e9 2244 int ret;
1da177e4 2245
864472e9
TM		 2246 ctx = nfs4_state_find_open_context(state);
2247 if (IS_ERR(ctx))
91876b13 2248 return -EAGAIN;
539cd03a 2249 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2250 put_nfs_open_context(ctx);
2251 return ret;
1da177e4
LT		 2252}
2253
4dfd4f7a
TM		 2254static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2255{
2256 nfs_remove_bad_delegation(state->inode);
2257 write_seqlock(&state->seqlock);
2258 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2259 write_sequnlock(&state->seqlock);
2260 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2261}
2262
2263static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2264{
2265 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2266 nfs_finish_clear_delegation_stateid(state);
2267}
2268
2269static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2270{
2271 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2272 nfs40_clear_delegation_stateid(state);
2273 return nfs4_open_expired(sp, state);
2274}
2275
f062eb6c 2276#if defined(CONFIG_NFS_V4_1)
0c116cad 2277static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2278{
f062eb6c 2279 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2280 nfs4_stateid stateid;
ab7cb0df 2281 struct nfs_delegation *delegation;
0c116cad
TM		 2282 struct rpc_cred *cred;
2283 int status;
3e60ffdd 2284
ab7cb0df
TM		 2285 /* Get the delegation credential for use by test/free_stateid */
2286 rcu_read_lock();
2287 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2288 if (delegation == NULL) {
ab7cb0df 2289 rcu_read_unlock();
0c116cad
TM		 2290 return;
2291 }
2292
2293 nfs4_stateid_copy(&stateid, &delegation->stateid);
2294 cred = get_rpccred(delegation->cred);
2295 rcu_read_unlock();
2296 status = nfs41_test_stateid(server, &stateid, cred);
2297 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2298
3e60ffdd
CL		 2299 if (status != NFS_OK) {
2300 /* Free the stateid unless the server explicitly
2301 * informs us the stateid is unrecognized. */
2302 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2303 nfs41_free_stateid(server, &stateid, cred);
2304 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2305 }
ab7cb0df 2306
0c116cad 2307 put_rpccred(cred);
3e60ffdd
CL		 2308}
2309
2310/**
2311 * nfs41_check_open_stateid - possibly free an open stateid
2312 *
2313 * @state: NFSv4 state for an inode
2314 *
2315 * Returns NFS_OK if recovery for this stateid is now finished.
2316 * Otherwise a negative NFS4ERR value is returned.
2317 */
2318static int nfs41_check_open_stateid(struct nfs4_state *state)
2319{
2320 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2321 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2322 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2323 int status;
2324
2325 /* If a state reset has been done, test_stateid is unneeded */
2326 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2327 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2328 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2329 return -NFS4ERR_BAD_STATEID;
2330
ab7cb0df 2331 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2332 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2333 if (status != NFS_OK) {
2334 /* Free the stateid unless the server explicitly
2335 * informs us the stateid is unrecognized. */
2336 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2337 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2338
2339 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2340 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2341 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2342 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2343 }
2344 return status;
2345}
2346
2347static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2348{
eb64cf96 2349 int status;
b01dd1d8 2350
0c116cad 2351 nfs41_check_delegation_stateid(state);
3e60ffdd 2352 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2353 if (status != NFS_OK)
2354 status = nfs4_open_expired(sp, state);
2355 return status;
f062eb6c
BS		 2356}
2357#endif
2358
aa53ed54
JL		 2359/*
2360 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2361 * fields corresponding to attributes that were used to store the verifier.
2362 * Make sure we clobber those fields in the later setattr call
2363 */
5334c5bd
KM		 2364static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2365 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2366{
5334c5bd
KM		 2367 const u32 *attrset = opendata->o_res.attrset;
2368
2369 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2370 !(sattr->ia_valid & ATTR_ATIME_SET))
2371 sattr->ia_valid |= ATTR_ATIME;
2372
5334c5bd 2373 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2374 !(sattr->ia_valid & ATTR_MTIME_SET))
2375 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2376
2377 /* Except MODE, it seems harmless of setting twice. */
2378 if ((attrset[1] & FATTR4_WORD1_MODE))
2379 sattr->ia_valid &= ~ATTR_MODE;
2380
2381 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2382 *label = NULL;
aa53ed54
JL		 2383}
2384
c21443c2
TM		 2385static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2386 fmode_t fmode,
2387 int flags,
3efb9722 2388 struct nfs_open_context *ctx)
c21443c2
TM		 2389{
2390 struct nfs4_state_owner *sp = opendata->owner;
2391 struct nfs_server *server = sp->so_server;
275bb307 2392 struct dentry *dentry;
c21443c2
TM		 2393 struct nfs4_state *state;
2394 unsigned int seq;
2395 int ret;
2396
2397 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2398
2399 ret = _nfs4_proc_open(opendata);
dca78001 2400 if (ret != 0)
c21443c2
TM		 2401 goto out;
2402
2403 state = nfs4_opendata_to_nfs4_state(opendata);
2404 ret = PTR_ERR(state);
2405 if (IS_ERR(state))
2406 goto out;
2407 if (server->caps & NFS_CAP_POSIX_LOCK)
2408 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2409
275bb307 2410 dentry = opendata->dentry;
2b0143b5 2411 if (d_really_is_negative(dentry)) {
275bb307
TM		 2412 /* FIXME: Is this d_drop() ever needed? */
2413 d_drop(dentry);
2414 dentry = d_add_unique(dentry, igrab(state->inode));
2415 if (dentry == NULL) {
2416 dentry = opendata->dentry;
2417 } else if (dentry != ctx->dentry) {
2418 dput(ctx->dentry);
2419 ctx->dentry = dget(dentry);
2420 }
2421 nfs_set_verifier(dentry,
2b0143b5 2422 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2423 }
2424
c21443c2
TM		 2425 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2426 if (ret != 0)
2427 goto out;
2428
3efb9722 2429 ctx->state = state;
2b0143b5 2430 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2431 nfs_inode_attach_open_context(ctx);
2432 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2433 nfs4_schedule_stateid_recovery(server, state);
2434 }
c21443c2
TM		 2435out:
2436 return ret;
2437}
2438
1da177e4 2439/*
24ac23ab 2440 * Returns a referenced nfs4_state
1da177e4 2441 */
82be417a 2442static int _nfs4_do_open(struct inode *dir,
4197a055 2443 struct nfs_open_context *ctx,
82be417a
AA		 2444 int flags,
2445 struct iattr *sattr,
5bc2afc2
TM		 2446 struct nfs4_label *label,
2447 int *opened)
1da177e4
LT		 2448{
2449 struct nfs4_state_owner *sp;
2450 struct nfs4_state *state = NULL;
2451 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2452 struct nfs4_opendata *opendata;
4197a055
TM		 2453 struct dentry *dentry = ctx->dentry;
2454 struct rpc_cred *cred = ctx->cred;
2455 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2456 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2457 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2458 struct nfs4_label *olabel = NULL;
aac00a8d 2459 int status;
1da177e4
LT		 2460
2461 /* Protect against reboot recovery conflicts */
1da177e4 2462 status = -ENOMEM;
d1e284d5
TM		 2463 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2464 if (sp == NULL) {
1da177e4
LT		 2465 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2466 goto out_err;
2467 }
58d9714a
TM		 2468 status = nfs4_recover_expired_lease(server);
2469 if (status != 0)
b4454fe1 2470 goto err_put_state_owner;
2b0143b5
DH		 2471 if (d_really_is_positive(dentry))
2472 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2473 status = -ENOMEM;
2b0143b5 2474 if (d_really_is_positive(dentry))
49f9a0fa 2475 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2476 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2477 label, claim, GFP_KERNEL);
e56e0b78 2478 if (opendata == NULL)
95d35cb4 2479 goto err_put_state_owner;
1da177e4 2480
14c43f76
DQ		 2481 if (label) {
2482 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2483 if (IS_ERR(olabel)) {
2484 status = PTR_ERR(olabel);
2485 goto err_opendata_put;
2486 }
2487 }
2488
e911b815
TM		 2489 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2490 if (!opendata->f_attr.mdsthreshold) {
2491 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2492 if (!opendata->f_attr.mdsthreshold)
2493 goto err_free_label;
2494 }
1549210f 2495 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2496 }
2b0143b5
DH		 2497 if (d_really_is_positive(dentry))
2498 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2499
3efb9722 2500 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2501 if (status != 0)
14c43f76 2502 goto err_free_label;
3efb9722 2503 state = ctx->state;
6168f62c 2504
efcbc04e 2505 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2506 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2507 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2508
2509 nfs_fattr_init(opendata->o_res.f_attr);
2510 status = nfs4_do_setattr(state->inode, cred,
2511 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2512 state, label, olabel);
2513 if (status == 0) {
f044636d
TM		 2514 nfs_setattr_update_inode(state->inode, sattr,
2515 opendata->o_res.f_attr);
aa9c2669 2516 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2517 }
0ab64e0e 2518 }
c5c3fb5f 2519 if (opened && opendata->file_created)
5bc2afc2 2520 *opened |= FILE_CREATED;
82be417a 2521
e911b815 2522 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2523 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2524 opendata->f_attr.mdsthreshold = NULL;
2525 }
82be417a 2526
14c43f76
DQ		 2527 nfs4_label_free(olabel);
2528
c6d00e63 2529 nfs4_opendata_put(opendata);
1da177e4 2530 nfs4_put_state_owner(sp);
1da177e4 2531 return 0;
14c43f76
DQ		 2532err_free_label:
2533 nfs4_label_free(olabel);
c6d00e63
TM		 2534err_opendata_put:
2535 nfs4_opendata_put(opendata);
e56e0b78
TM		 2536err_put_state_owner:
2537 nfs4_put_state_owner(sp);
1da177e4 2538out_err:
1da177e4
LT		 2539 return status;
2540}
2541
2542
82be417a 2543static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2544 struct nfs_open_context *ctx,
82be417a
AA		 2545 int flags,
2546 struct iattr *sattr,
5bc2afc2
TM		 2547 struct nfs4_label *label,
2548 int *opened)
1da177e4 2549{
49f9a0fa 2550 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2551 struct nfs4_exception exception = { };
2552 struct nfs4_state *res;
2553 int status;
2554
2555 do {
5bc2afc2 2556 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2557 res = ctx->state;
42113a75 2558 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2559 if (status == 0)
2560 break;
2561 /* NOTE: BAD_SEQID means the server and client disagree about the
2562 * book-keeping w.r.t. state-changing operations
2563 * (OPEN/CLOSE/LOCK/LOCKU...)
2564 * It is actually a sign of a bug on the client or on the server.
2565 *
2566 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2567 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2568 * have unhashed the old state_owner for us, and that we can
2569 * therefore safely retry using a new one. We should still warn
2570 * the user though...
2571 */
2572 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2573 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2574 " returned a bad sequence-id error!\n",
2575 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2576 exception.retry = 1;
2577 continue;
2578 }
550f5747
TM		 2579 /*
2580 * BAD_STATEID on OPEN means that the server cancelled our
2581 * state before it received the OPEN_CONFIRM.
2582 * Recover by retrying the request as per the discussion
2583 * on Page 181 of RFC3530.
2584 */
2585 if (status == -NFS4ERR_BAD_STATEID) {
2586 exception.retry = 1;
2587 continue;
2588 }
aac00a8d
TM		 2589 if (status == -EAGAIN) {
2590 /* We must have found a delegation */
2591 exception.retry = 1;
2592 continue;
2593 }
49f9a0fa
TM		 2594 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2595 continue;
2596 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2597 status, &exception));
2598 } while (exception.retry);
2599 return res;
2600}
2601
659bfcd6
TM		 2602static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2603 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2604 struct nfs4_state *state, struct nfs4_label *ilabel,
2605 struct nfs4_label *olabel)
1da177e4 2606{
3e4f6290 2607 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2608 struct nfs_setattrargs arg = {
3e4f6290 2609 .fh = NFS_FH(inode),
1da177e4
LT		 2610 .iap = sattr,
2611 .server = server,
2612 .bitmask = server->attr_bitmask,
1775fd3e 2613 .label = ilabel,
1da177e4
LT		 2614 };
2615 struct nfs_setattrres res = {
2616 .fattr = fattr,
1775fd3e 2617 .label = olabel,
1da177e4
LT		 2618 .server = server,
2619 };
2620 struct rpc_message msg = {
659bfcd6
TM		 2621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2622 .rpc_argp = &arg,
2623 .rpc_resp = &res,
2624 .rpc_cred = cred,
1da177e4 2625 };
26e976a8 2626 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2627 fmode_t fmode;
2628 bool truncate;
65e4308d 2629 int status;
1da177e4 2630
aa9c2669
DQ		 2631 arg.bitmask = nfs4_bitmask(server, ilabel);
2632 if (ilabel)
2633 arg.bitmask = nfs4_bitmask(server, olabel);
2634
0e574af1 2635 nfs_fattr_init(fattr);
1da177e4 2636
ee3ae84e
TM		 2637 /* Servers should only apply open mode checks for file size changes */
2638 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2639 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2640
2641 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2642 /* Use that stateid */
0418dae1 2643 } else if (truncate && state != NULL) {
2a369153
TM		 2644 struct nfs_lockowner lockowner = {
2645 .l_owner = current->files,
2646 .l_pid = current->tgid,
2647 };
0418dae1
TM		 2648 if (!nfs4_valid_open_stateid(state))
2649 return -EBADF;
2650 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2651 &lockowner) == -EIO)
2652 return -EBADF;
08e9eac4 2653 } else
f597c537 2654 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2655
7c513058 2656 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2657 if (status == 0 && state != NULL)
2658 renew_lease(server, timestamp);
65e4308d 2659 return status;
1da177e4
LT		 2660}
2661
659bfcd6
TM		 2662static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2663 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2664 struct nfs4_state *state, struct nfs4_label *ilabel,
2665 struct nfs4_label *olabel)
1da177e4 2666{
3e4f6290 2667 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2668 struct nfs4_exception exception = {
2669 .state = state,
3114ea7a 2670 .inode = inode,
a1d0b5ee 2671 };
1da177e4
LT		 2672 int err;
2673 do {
1775fd3e 2674 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2675 trace_nfs4_setattr(inode, err);
451146be
TM		 2676 switch (err) {
2677 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2678 if (!(sattr->ia_valid & ATTR_SIZE)) {
2679 pr_warn_once("NFSv4: server %s is incorrectly "
2680 "applying open mode checks to "
2681 "a SETATTR that is not "
2682 "changing file size.\n",
2683 server->nfs_client->cl_hostname);
2684 }
451146be
TM		 2685 if (state && !(state->state & FMODE_WRITE)) {
2686 err = -EBADF;
2687 if (sattr->ia_valid & ATTR_OPEN)
2688 err = -EACCES;
2689 goto out;
2690 }
2691 }
2692 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2693 } while (exception.retry);
451146be 2694out:
1da177e4
LT		 2695 return err;
2696}
2697
500d701f
PT		 2698static bool
2699nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2700{
2701 if (inode == NULL || !nfs_have_layout(inode))
2702 return false;
2703
2704 return pnfs_wait_on_layoutreturn(inode, task);
2705}
2706
1da177e4
LT		 2707struct nfs4_closedata {
2708 struct inode *inode;
2709 struct nfs4_state *state;
2710 struct nfs_closeargs arg;
2711 struct nfs_closeres res;
516a6af6 2712 struct nfs_fattr fattr;
26e976a8 2713 unsigned long timestamp;
f7e8917a
FI		 2714 bool roc;
2715 u32 roc_barrier;
1da177e4
LT		 2716};
2717
963d8fe5 2718static void nfs4_free_closedata(void *data)
9512135d 2719{
963d8fe5
TM		 2720 struct nfs4_closedata *calldata = data;
2721 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2722 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2723
f7e8917a
FI		 2724 if (calldata->roc)
2725 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2726 nfs4_put_open_state(calldata->state);
2727 nfs_free_seqid(calldata->arg.seqid);
9512135d 2728 nfs4_put_state_owner(sp);
322b2b90 2729 nfs_sb_deactive(sb);
9512135d
TM		 2730 kfree(calldata);
2731}
2732
963d8fe5 2733static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2734{
963d8fe5 2735 struct nfs4_closedata *calldata = data;
1da177e4 2736 struct nfs4_state *state = calldata->state;
1da177e4 2737 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2738 nfs4_stateid *res_stateid = NULL;
1da177e4 2739
a3ca5651 2740 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2741 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2742 return;
42113a75 2743 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2744 /* hmm. we are done with the inode, and in the process of freeing
2745 * the state_owner. we keep this around to process errors
2746 */
1da177e4
LT		 2747 switch (task->tk_status) {
2748 case 0:
412f6c4c 2749 res_stateid = &calldata->res.stateid;
3c13cb5b 2750 if (calldata->roc)
f7e8917a
FI		 2751 pnfs_roc_set_barrier(state->inode,
2752 calldata->roc_barrier);
26e976a8 2753 renew_lease(server, calldata->timestamp);
412f6c4c 2754 break;
69794ad7 2755 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2756 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2757 case -NFS4ERR_OLD_STATEID:
2758 case -NFS4ERR_BAD_STATEID:
1da177e4 2759 case -NFS4ERR_EXPIRED:
566fcec6 2760 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2761 &state->open_stateid)) {
566fcec6
TM		 2762 rpc_restart_call_prepare(task);
2763 goto out_release;
2764 }
dc0b027d 2765 if (calldata->arg.fmode == 0)
9e33bed5 2766 break;
1da177e4 2767 default:
8478eaa1 2768 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2769 rpc_restart_call_prepare(task);
69794ad7
TM		 2770 goto out_release;
2771 }
1da177e4 2772 }
4a1e2feb
TM		 2773 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2774 res_stateid, calldata->arg.fmode);
69794ad7 2775out_release:
72211dbe 2776 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2777 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2778 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2779}
2780
4ce70ada 2781static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2782{
4ce70ada 2783 struct nfs4_closedata *calldata = data;
9512135d 2784 struct nfs4_state *state = calldata->state;
7fdab069 2785 struct inode *inode = calldata->inode;
aee7af35 2786 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2787 int call_close = 0;
9512135d 2788
a3ca5651 2789 dprintk("%s: begin!\n", __func__);
963d8fe5 2790 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2791 goto out_wait;
003707c7 2792
88069f77 2793 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2794 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2795 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2796 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2797 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2798 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2799 /* Calculate the change in open mode */
cd9288ff 2800 calldata->arg.fmode = 0;
e7616923 2801 if (state->n_rdwr == 0) {
cd9288ff
TM		 2802 if (state->n_rdonly == 0)
2803 call_close |= is_rdonly;
2804 else if (is_rdonly)
2805 calldata->arg.fmode |= FMODE_READ;
2806 if (state->n_wronly == 0)
2807 call_close |= is_wronly;
2808 else if (is_wronly)
2809 calldata->arg.fmode |= FMODE_WRITE;
2810 } else if (is_rdwr)
2811 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2812
2813 if (calldata->arg.fmode == 0)
2814 call_close |= is_rdwr;
2815
5d422301
TM		 2816 if (!nfs4_valid_open_stateid(state))
2817 call_close = 0;
4cecb76f 2818 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2819
2820 if (!call_close) {
963d8fe5 2821 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2822 goto out_no_action;
9512135d 2823 }
88069f77 2824
500d701f
PT		 2825 if (nfs4_wait_on_layoutreturn(inode, task)) {
2826 nfs_release_seqid(calldata->arg.seqid);
2827 goto out_wait;
2828 }
2829
3c13cb5b 2830 if (calldata->arg.fmode == 0)
88069f77 2831 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2832 if (calldata->roc)
2833 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2834
6ae37339
TM		 2835 calldata->arg.share_access =
2836 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2837 calldata->arg.fmode, 0);
88069f77 2838
516a6af6 2839 nfs_fattr_init(calldata->res.fattr);
26e976a8 2840 calldata->timestamp = jiffies;
7fdab069 2841 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2842 &calldata->arg.seq_args,
2843 &calldata->res.seq_res,
2240a9e2
TM		 2844 task) != 0)
2845 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2846 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2847 return;
2848out_no_action:
2849 task->tk_action = NULL;
2850out_wait:
2851 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2852}
2853
963d8fe5 2854static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2855 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2856 .rpc_call_done = nfs4_close_done,
2857 .rpc_release = nfs4_free_closedata,
2858};
2859
fe08c546
PT		 2860static bool nfs4_roc(struct inode *inode)
2861{
40dd4b7a 2862 if (!nfs_have_layout(inode))
fe08c546 2863 return false;
fe08c546
PT		 2864 return pnfs_roc(inode);
2865}
2866
1da177e4
LT		 2867/*
2868 * It is possible for data to be read/written from a mem-mapped file
2869 * after the sys_close call (which hits the vfs layer as a flush).
2870 * This means that we can't safely call nfsv4 close on a file until
2871 * the inode is cleared. This in turn means that we are not good
2872 * NFSv4 citizens - we do not indicate to the server to update the file's
2873 * share state even when we are done with one of the three share
2874 * stateid's in the inode.
2875 *
2876 * NOTE: Caller must be holding the sp->so_owner semaphore!
2877 */
1f7977c1 2878int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2879{
4a35bd41 2880 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2881 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2882 struct nfs4_closedata *calldata;
b39e625b
TM		 2883 struct nfs4_state_owner *sp = state->owner;
2884 struct rpc_task *task;
5138fde0
TM		 2885 struct rpc_message msg = {
2886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2887 .rpc_cred = state->owner->so_cred,
2888 };
c970aa85
TM		 2889 struct rpc_task_setup task_setup_data = {
2890 .rpc_client = server->client,
5138fde0 2891 .rpc_message = &msg,
c970aa85 2892 .callback_ops = &nfs4_close_ops,
101070ca 2893 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2894 .flags = RPC_TASK_ASYNC,
2895 };
9512135d 2896 int status = -ENOMEM;
1da177e4 2897
fa940720
WAA		 2898 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2899 &task_setup_data.rpc_client, &msg);
2900
8535b2be 2901 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2902 if (calldata == NULL)
9512135d 2903 goto out;
a9c92d6b 2904 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2905 calldata->inode = state->inode;
1da177e4 2906 calldata->state = state;
4a35bd41 2907 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2908 /* Serialization for the sequence id */
63f5f796
TM		 2909 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2910 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2911 if (IS_ERR(calldata->arg.seqid))
9512135d 2912 goto out_free_calldata;
dc0b027d 2913 calldata->arg.fmode = 0;
a65318bf 2914 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2915 calldata->res.fattr = &calldata->fattr;
c1d51931 2916 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2917 calldata->res.server = server;
fe08c546 2918 calldata->roc = nfs4_roc(state->inode);
643168c2 2919 nfs_sb_active(calldata->inode->i_sb);
9512135d 2920
1174dd1f
TM		 2921 msg.rpc_argp = &calldata->arg;
2922 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2923 task_setup_data.callback_data = calldata;
2924 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2925 if (IS_ERR(task))
2926 return PTR_ERR(task);
a49c3c77
TM		 2927 status = 0;
2928 if (wait)
2929 status = rpc_wait_for_completion_task(task);
b39e625b 2930 rpc_put_task(task);
a49c3c77 2931 return status;
9512135d
TM		 2932out_free_calldata:
2933 kfree(calldata);
2934out:
b39e625b
TM		 2935 nfs4_put_open_state(state);
2936 nfs4_put_state_owner(sp);
9512135d 2937 return status;
1da177e4
LT		 2938}
2939
2b484297 2940static struct inode *
5bc2afc2
TM		 2941nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2942 int open_flags, struct iattr *attr, int *opened)
1da177e4 2943{
1da177e4 2944 struct nfs4_state *state;
aa9c2669
DQ		 2945 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2946
2947 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2948
565277f6 2949 /* Protect against concurrent sillydeletes */
5bc2afc2 2950 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2951
2952 nfs4_label_release_security(label);
2953
f46e0bd3
TM		 2954 if (IS_ERR(state))
2955 return ERR_CAST(state);
275bb307 2956 return state->inode;
1da177e4
LT		 2957}
2958
1185a552 2959static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2960{
2961 if (ctx->state == NULL)
2962 return;
2963 if (is_sync)
643168c2 2964 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2965 else
643168c2 2966 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2967}
1da177e4 2968
b944dba3
TM		 2969#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2970#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2971#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2972
1da177e4
LT		 2973static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2974{
8c61282f 2975 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2976 struct nfs4_server_caps_arg args = {
2977 .fhandle = fhandle,
8c61282f 2978 .bitmask = bitmask,
43652ad5 2979 };
1da177e4
LT		 2980 struct nfs4_server_caps_res res = {};
2981 struct rpc_message msg = {
2982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2983 .rpc_argp = &args,
1da177e4
LT		 2984 .rpc_resp = &res,
2985 };
2986 int status;
2987
8c61282f
KM		 2988 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2989 FATTR4_WORD0_FH_EXPIRE_TYPE |
2990 FATTR4_WORD0_LINK_SUPPORT |
2991 FATTR4_WORD0_SYMLINK_SUPPORT |
2992 FATTR4_WORD0_ACLSUPPORT;
2993 if (minorversion)
2994 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2995
7c513058 2996 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2997 if (status == 0) {
b944dba3 2998 /* Sanity check the server answers */
8c61282f 2999 switch (minorversion) {
b944dba3
TM		 3000 case 0:
3001 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3002 res.attr_bitmask[2] = 0;
3003 break;
3004 case 1:
3005 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3006 break;
3007 case 2:
3008 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3009 }
1da177e4 3010 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3011 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3012 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3013 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3014 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3015 NFS_CAP_CTIME|NFS_CAP_MTIME|
3016 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3017 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3018 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3019 server->caps |= NFS_CAP_ACLS;
3020 if (res.has_links != 0)
3021 server->caps |= NFS_CAP_HARDLINKS;
3022 if (res.has_symlinks != 0)
3023 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3024 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3025 server->caps |= NFS_CAP_FILEID;
3026 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3027 server->caps |= NFS_CAP_MODE;
3028 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3029 server->caps |= NFS_CAP_NLINK;
3030 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3031 server->caps |= NFS_CAP_OWNER;
3032 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3033 server->caps |= NFS_CAP_OWNER_GROUP;
3034 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3035 server->caps |= NFS_CAP_ATIME;
3036 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3037 server->caps |= NFS_CAP_CTIME;
3038 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3039 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3040#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3041 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3042 server->caps |= NFS_CAP_SECURITY_LABEL;
3043#endif
3044 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3045 sizeof(server->attr_bitmask));
b944dba3 3046 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3047
a65318bf
TM		 3048 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3049 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3050 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3051 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3052 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3053 sizeof(server->exclcreat_bitmask));
1da177e4 3054 server->acl_bitmask = res.acl_bitmask;
264e6351 3055 server->fh_expire_type = res.fh_expire_type;
1da177e4 3056 }
cccef3b9 3057
1da177e4
LT		 3058 return status;
3059}
3060
55a97593 3061int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3062{
3063 struct nfs4_exception exception = { };
3064 int err;
3065 do {
3066 err = nfs4_handle_exception(server,
3067 _nfs4_server_capabilities(server, fhandle),
3068 &exception);
3069 } while (exception.retry);
3070 return err;
3071}
3072
3073static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3074 struct nfs_fsinfo *info)
3075{
aa9c2669 3076 u32 bitmask[3];
1da177e4 3077 struct nfs4_lookup_root_arg args = {
aa9c2669 3078 .bitmask = bitmask,
1da177e4
LT		 3079 };
3080 struct nfs4_lookup_res res = {
3081 .server = server,
0e574af1 3082 .fattr = info->fattr,
1da177e4
LT		 3083 .fh = fhandle,
3084 };
3085 struct rpc_message msg = {
3086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3087 .rpc_argp = &args,
3088 .rpc_resp = &res,
3089 };
008f55d0 3090
aa9c2669
DQ		 3091 bitmask[0] = nfs4_fattr_bitmap[0];
3092 bitmask[1] = nfs4_fattr_bitmap[1];
3093 /*
3094 * Process the label in the upcoming getfattr
3095 */
3096 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3097
0e574af1 3098 nfs_fattr_init(info->fattr);
7c513058 3099 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3100}
3101
3102static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3103 struct nfs_fsinfo *info)
3104{
3105 struct nfs4_exception exception = { };
3106 int err;
3107 do {
fb8a5ba8 3108 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3109 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3110 switch (err) {
3111 case 0:
3112 case -NFS4ERR_WRONGSEC:
05e9cfb4 3113 goto out;
fb8a5ba8
BS		 3114 default:
3115 err = nfs4_handle_exception(server, err, &exception);
3116 }
1da177e4 3117 } while (exception.retry);
05e9cfb4 3118out:
1da177e4
LT		 3119 return err;
3120}
3121
8f70e95f
BS		 3122static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3123 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3124{
c2190661
TM		 3125 struct rpc_auth_create_args auth_args = {
3126 .pseudoflavor = flavor,
3127 };
8f70e95f
BS		 3128 struct rpc_auth *auth;
3129 int ret;
3130
c2190661 3131 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3132 if (IS_ERR(auth)) {
75bc8821 3133 ret = -EACCES;
8f70e95f
BS		 3134 goto out;
3135 }
3136 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3137out:
3138 return ret;
3139}
3140
9a744ba3
CL		 3141/*
3142 * Retry pseudoroot lookup with various security flavors. We do this when:
3143 *
3144 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3145 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3146 *
3147 * Returns zero on success, or a negative NFS4ERR value, or a
3148 * negative errno value.
3149 */
801a16dc 3150static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3151 struct nfs_fsinfo *info)
1da177e4 3152{
9a744ba3
CL		 3153 /* Per 3530bis 15.33.5 */
3154 static const rpc_authflavor_t flav_array[] = {
3155 RPC_AUTH_GSS_KRB5P,
3156 RPC_AUTH_GSS_KRB5I,
3157 RPC_AUTH_GSS_KRB5,
c4eafe11 3158 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3159 RPC_AUTH_NULL,
3160 };
3161 int status = -EPERM;
3162 size_t i;
6a1a1e34 3163
4d4b69dd
WAA		 3164 if (server->auth_info.flavor_len > 0) {
3165 /* try each flavor specified by user */
3166 for (i = 0; i < server->auth_info.flavor_len; i++) {
3167 status = nfs4_lookup_root_sec(server, fhandle, info,
3168 server->auth_info.flavors[i]);
3169 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3170 continue;
3171 break;
3172 }
3173 } else {
3174 /* no flavors specified by user, try default list */
3175 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3176 status = nfs4_lookup_root_sec(server, fhandle, info,
3177 flav_array[i]);
3178 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3179 continue;
3180 break;
3181 }
8f70e95f 3182 }
9a744ba3 3183
fb8a5ba8
BS		 3184 /*
3185 * -EACCESS could mean that the user doesn't have correct permissions
3186 * to access the mount. It could also mean that we tried to mount
3187 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3188 * existing mount programs don't handle -EACCES very well so it should
3189 * be mapped to -EPERM instead.
3190 */
3191 if (status == -EACCES)
3192 status = -EPERM;
801a16dc
BS		 3193 return status;
3194}
3195
2ed4b95b
CL		 3196static int nfs4_do_find_root_sec(struct nfs_server *server,
3197 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3198{
3199 int mv = server->nfs_client->cl_minorversion;
3200 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3201}
3202
3203/**
3204 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3205 * @server: initialized nfs_server handle
3206 * @fhandle: we fill in the pseudo-fs root file handle
3207 * @info: we fill in an FSINFO struct
5e6b1990 3208 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3209 *
3210 * Returns zero on success, or a negative errno.
801a16dc 3211 */
3028eb2b 3212int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3213 struct nfs_fsinfo *info,
3214 bool auth_probe)
801a16dc 3215{
c7757074 3216 int status = 0;
2ed4b95b 3217
c7757074 3218 if (!auth_probe)
5e6b1990 3219 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3220
3221 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3222 status = nfs4_do_find_root_sec(server, fhandle, info);
3223
1da177e4
LT		 3224 if (status == 0)
3225 status = nfs4_server_capabilities(server, fhandle);
3226 if (status == 0)
3227 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3228
c12e87f4 3229 return nfs4_map_errors(status);
1da177e4
LT		 3230}
3231
bae36241
BS		 3232static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3233 struct nfs_fsinfo *info)
3234{
3235 int error;
3236 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3237 struct nfs4_label *label = NULL;
bae36241
BS		 3238
3239 error = nfs4_server_capabilities(server, mntfh);
3240 if (error < 0) {
3241 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3242 return error;
3243 }
3244
14c43f76
DQ		 3245 label = nfs4_label_alloc(server, GFP_KERNEL);
3246 if (IS_ERR(label))
3247 return PTR_ERR(label);
3248
1775fd3e 3249 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3250 if (error < 0) {
3251 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3252 goto err_free_label;
bae36241
BS		 3253 }
3254
3255 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3256 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3257 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3258
14c43f76
DQ		 3259err_free_label:
3260 nfs4_label_free(label);
3261
bae36241
BS		 3262 return error;
3263}
3264
6b97fd3d
MN		 3265/*
3266 * Get locations and (maybe) other attributes of a referral.
3267 * Note that we'll actually follow the referral later when
3268 * we detect fsid mismatch in inode revalidation
3269 */
f05d147f
BS		 3270static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3271 const struct qstr *name, struct nfs_fattr *fattr,
3272 struct nfs_fh *fhandle)
6b97fd3d
MN		 3273{
3274 int status = -ENOMEM;
3275 struct page *page = NULL;
3276 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3277
3278 page = alloc_page(GFP_KERNEL);
3279 if (page == NULL)
3280 goto out;
3281 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3282 if (locations == NULL)
3283 goto out;
3284
f05d147f 3285 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3286 if (status != 0)
3287 goto out;
519ae255
CL		 3288
3289 /*
3290 * If the fsid didn't change, this is a migration event, not a
3291 * referral. Cause us to drop into the exception handler, which
3292 * will kick off migration recovery.
3293 */
6b97fd3d 3294 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3295 dprintk("%s: server did not return a different fsid for"
3296 " a referral at %s\n", __func__, name->name);
519ae255 3297 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3298 goto out;
3299 }
533eb461
AA		 3300 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3301 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3302
533eb461 3303 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3304 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3305 memset(fhandle, 0, sizeof(struct nfs_fh));
3306out:
3307 if (page)
3308 __free_page(page);
5d7ca35a 3309 kfree(locations);
6b97fd3d
MN		 3310 return status;
3311}
3312
1775fd3e
DQ		 3313static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3314 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3315{
3316 struct nfs4_getattr_arg args = {
3317 .fh = fhandle,
3318 .bitmask = server->attr_bitmask,
3319 };
3320 struct nfs4_getattr_res res = {
3321 .fattr = fattr,
1775fd3e 3322 .label = label,
1da177e4
LT		 3323 .server = server,
3324 };
3325 struct rpc_message msg = {
3326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3327 .rpc_argp = &args,
3328 .rpc_resp = &res,
3329 };
aa9c2669
DQ		 3330
3331 args.bitmask = nfs4_bitmask(server, label);
3332
0e574af1 3333 nfs_fattr_init(fattr);
7c513058 3334 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3335}
3336
1775fd3e
DQ		 3337static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3338 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3339{
3340 struct nfs4_exception exception = { };
3341 int err;
3342 do {
b5f875a9
TM		 3343 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3344 trace_nfs4_getattr(server, fhandle, fattr, err);
3345 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3346 &exception);
3347 } while (exception.retry);
3348 return err;
3349}
3350
3351/*
3352 * The file is not closed if it is opened due to the a request to change
3353 * the size of the file. The open call will not be needed once the
3354 * VFS layer lookup-intents are implemented.
3355 *
3356 * Close is called when the inode is destroyed.
3357 * If we haven't opened the file for O_WRONLY, we
3358 * need to in the size_change case to obtain a stateid.
3359 *
3360 * Got race?
3361 * Because OPEN is always done by name in nfsv4, it is
3362 * possible that we opened a different file by the same
3363 * name. We can recognize this race condition, but we
3364 * can't do anything about it besides returning an error.
3365 *
3366 * This will be fixed with VFS changes (lookup-intent).
3367 */
3368static int
3369nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3370 struct iattr *sattr)
3371{
2b0143b5 3372 struct inode *inode = d_inode(dentry);
659bfcd6 3373 struct rpc_cred *cred = NULL;
d530838b 3374 struct nfs4_state *state = NULL;
14c43f76 3375 struct nfs4_label *label = NULL;
1da177e4
LT		 3376 int status;
3377
88ac815c
PT		 3378 if (pnfs_ld_layoutret_on_setattr(inode) &&
3379 sattr->ia_valid & ATTR_SIZE &&
3380 sattr->ia_size < i_size_read(inode))
24028672 3381 pnfs_commit_and_return_layout(inode);
8a1636c4 3382
0e574af1 3383 nfs_fattr_init(fattr);
1da177e4 3384
2669940d
AA		 3385 /* Deal with open(O_TRUNC) */
3386 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3387 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3388
3389 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3390 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3391 return 0;
3392
d530838b 3393 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3394 if (sattr->ia_valid & ATTR_FILE) {
3395 struct nfs_open_context *ctx;
3396
3397 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3398 if (ctx) {
3399 cred = ctx->cred;
3400 state = ctx->state;
3401 }
659bfcd6 3402 }
08e9eac4 3403
14c43f76
DQ		 3404 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3405 if (IS_ERR(label))
3406 return PTR_ERR(label);
3407
3408 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3409 if (status == 0) {
f044636d 3410 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3411 nfs_setsecurity(inode, fattr, label);
3412 }
14c43f76 3413 nfs4_label_free(label);
1da177e4
LT		 3414 return status;
3415}
3416
0c2e53f1
TM		 3417static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3418 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3419 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3420{
0c2e53f1 3421 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3422 int status;
3423 struct nfs4_lookup_arg args = {
3424 .bitmask = server->attr_bitmask,
0c2e53f1 3425 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3426 .name = name,
3427 };
3428 struct nfs4_lookup_res res = {
3429 .server = server,
3430 .fattr = fattr,
aa9c2669 3431 .label = label,
2b3de441
DH		 3432 .fh = fhandle,
3433 };
3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3436 .rpc_argp = &args,
3437 .rpc_resp = &res,
3438 };
3439
aa9c2669
DQ		 3440 args.bitmask = nfs4_bitmask(server, label);
3441
2b3de441
DH		 3442 nfs_fattr_init(fattr);
3443
1da177e4 3444 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3445 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3446 dprintk("NFS reply lookup: %d\n", status);
3447 return status;
3448}
3449
72de53ec 3450static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3451{
7ebb9315 3452 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3453 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3454 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3455 fattr->nlink = 2;
3456}
3457
72de53ec
BS		 3458static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3459 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3460 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3461{
3462 struct nfs4_exception exception = { };
72de53ec 3463 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3464 int err;
3465 do {
1775fd3e 3466 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3467 trace_nfs4_lookup(dir, name, err);
72de53ec 3468 switch (err) {
08ef7bd3 3469 case -NFS4ERR_BADNAME:
72de53ec
BS		 3470 err = -ENOENT;
3471 goto out;
0c2e53f1 3472 case -NFS4ERR_MOVED:
f05d147f 3473 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3474 if (err == -NFS4ERR_MOVED)
3475 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3476 goto out;
0c2e53f1 3477 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3478 err = -EPERM;
3479 if (client != *clnt)
3480 goto out;
66b06860 3481 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3482 if (IS_ERR(client))
3483 return PTR_ERR(client);
3484
3485 exception.retry = 1;
3486 break;
3487 default:
3488 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3489 }
1da177e4 3490 } while (exception.retry);
72de53ec
BS		 3491
3492out:
3493 if (err == 0)
3494 *clnt = client;
3495 else if (client != *clnt)
3496 rpc_shutdown_client(client);
3497
1da177e4
LT		 3498 return err;
3499}
3500
80a16b21 3501static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3502 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3503 struct nfs4_label *label)
72de53ec
BS		 3504{
3505 int status;
3506 struct rpc_clnt *client = NFS_CLIENT(dir);
3507
1775fd3e 3508 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3509 if (client != NFS_CLIENT(dir)) {
3510 rpc_shutdown_client(client);
3511 nfs_fixup_secinfo_attributes(fattr);
3512 }
3513 return status;
3514}
3515
f05d147f
BS		 3516struct rpc_clnt *
3517nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3518 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3519{
b72888cb 3520 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3521 int status;
f05d147f 3522
1775fd3e 3523 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3524 if (status < 0)
f05d147f 3525 return ERR_PTR(status);
b72888cb 3526 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3527}
3528
1da177e4
LT		 3529static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3530{
76b32999 3531 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3532 struct nfs4_accessargs args = {
3533 .fh = NFS_FH(inode),
a4980e78 3534 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3535 };
3536 struct nfs4_accessres res = {
3537 .server = server,
1da177e4 3538 };
1da177e4
LT		 3539 struct rpc_message msg = {
3540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3541 .rpc_argp = &args,
3542 .rpc_resp = &res,
3543 .rpc_cred = entry->cred,
3544 };
3545 int mode = entry->mask;
aa9c2669 3546 int status = 0;
1da177e4
LT		 3547
3548 /*
3549 * Determine which access bits we want to ask for...
3550 */
3551 if (mode & MAY_READ)
3552 args.access |= NFS4_ACCESS_READ;
3553 if (S_ISDIR(inode->i_mode)) {
3554 if (mode & MAY_WRITE)
3555 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3556 if (mode & MAY_EXEC)
3557 args.access |= NFS4_ACCESS_LOOKUP;
3558 } else {
3559 if (mode & MAY_WRITE)
3560 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3561 if (mode & MAY_EXEC)
3562 args.access |= NFS4_ACCESS_EXECUTE;
3563 }
c407d41a
TM		 3564
3565 res.fattr = nfs_alloc_fattr();
3566 if (res.fattr == NULL)
3567 return -ENOMEM;
3568
7c513058 3569 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3570 if (!status) {
6168f62c 3571 nfs_access_set_mask(entry, res.access);
c407d41a 3572 nfs_refresh_inode(inode, res.fattr);
1da177e4 3573 }
c407d41a 3574 nfs_free_fattr(res.fattr);
1da177e4
LT		 3575 return status;
3576}
3577
3578static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3579{
3580 struct nfs4_exception exception = { };
3581 int err;
3582 do {
c1578b76
TM		 3583 err = _nfs4_proc_access(inode, entry);
3584 trace_nfs4_access(inode, err);
3585 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3586 &exception);
3587 } while (exception.retry);
3588 return err;
3589}
3590
3591/*
3592 * TODO: For the time being, we don't try to get any attributes
3593 * along with any of the zero-copy operations READ, READDIR,
3594 * READLINK, WRITE.
3595 *
3596 * In the case of the first three, we want to put the GETATTR
3597 * after the read-type operation -- this is because it is hard
3598 * to predict the length of a GETATTR response in v4, and thus
3599 * align the READ data correctly. This means that the GETATTR
3600 * may end up partially falling into the page cache, and we should
3601 * shift it into the 'tail' of the xdr_buf before processing.
3602 * To do this efficiently, we need to know the total length
3603 * of data received, which doesn't seem to be available outside
3604 * of the RPC layer.
3605 *
3606 * In the case of WRITE, we also want to put the GETATTR after
3607 * the operation -- in this case because we want to make sure
140150db 3608 * we get the post-operation mtime and size.
1da177e4
LT		 3609 *
3610 * Both of these changes to the XDR layer would in fact be quite
3611 * minor, but I decided to leave them for a subsequent patch.
3612 */
3613static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3614 unsigned int pgbase, unsigned int pglen)
3615{
3616 struct nfs4_readlink args = {
3617 .fh = NFS_FH(inode),
3618 .pgbase = pgbase,
3619 .pglen = pglen,
3620 .pages = &page,
3621 };
f50c7000 3622 struct nfs4_readlink_res res;
1da177e4
LT		 3623 struct rpc_message msg = {
3624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3625 .rpc_argp = &args,
f50c7000 3626 .rpc_resp = &res,
1da177e4
LT		 3627 };
3628
7c513058 3629 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3630}
3631
3632static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3633 unsigned int pgbase, unsigned int pglen)
3634{
3635 struct nfs4_exception exception = { };
3636 int err;
3637 do {
c1578b76
TM		 3638 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3639 trace_nfs4_readlink(inode, err);
3640 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3641 &exception);
3642 } while (exception.retry);
3643 return err;
3644}
3645
1da177e4 3646/*
8867fe58 3647 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3648 */
1da177e4
LT		 3649static int
3650nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3651 int flags)
1da177e4 3652{
aa9c2669 3653 struct nfs4_label l, *ilabel = NULL;
8867fe58 3654 struct nfs_open_context *ctx;
1da177e4 3655 struct nfs4_state *state;
1da177e4
LT		 3656 int status = 0;
3657
8867fe58
MS		 3658 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3659 if (IS_ERR(ctx))
3660 return PTR_ERR(ctx);
3661
aa9c2669
DQ		 3662 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3663
a8a5da99 3664 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3665 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3666 if (IS_ERR(state)) {
3667 status = PTR_ERR(state);
c0204fd2 3668 goto out;
1da177e4 3669 }
1da177e4 3670out:
aa9c2669 3671 nfs4_label_release_security(ilabel);
8867fe58 3672 put_nfs_open_context(ctx);
1da177e4
LT		 3673 return status;
3674}
3675
3676static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3677{
16e42959 3678 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3679 struct nfs_removeargs args = {
1da177e4 3680 .fh = NFS_FH(dir),
26fe5750 3681 .name = *name,
16e42959 3682 };
4fdc17b2 3683 struct nfs_removeres res = {
16e42959 3684 .server = server,
1da177e4 3685 };
1da177e4 3686 struct rpc_message msg = {
4fdc17b2
TM		 3687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3688 .rpc_argp = &args,
3689 .rpc_resp = &res,
1da177e4 3690 };
778d2817 3691 int status;
1da177e4 3692
7c513058 3693 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3694 if (status == 0)
16e42959 3695 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3696 return status;
3697}
3698
3699static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3700{
3701 struct nfs4_exception exception = { };
3702 int err;
3703 do {
078ea3df
TM		 3704 err = _nfs4_proc_remove(dir, name);
3705 trace_nfs4_remove(dir, name, err);
3706 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3707 &exception);
3708 } while (exception.retry);
3709 return err;
3710}
3711
e4eff1a6 3712static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3713{
e4eff1a6
TM		 3714 struct nfs_server *server = NFS_SERVER(dir);
3715 struct nfs_removeargs *args = msg->rpc_argp;
3716 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3717
e4eff1a6 3718 res->server = server;
1da177e4 3719 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3720 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3721
3722 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3723}
3724
34e137cc
BS		 3725static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3726{
d9afbd1b
TM		 3727 nfs4_setup_sequence(NFS_SERVER(data->dir),
3728 &data->args.seq_args,
3729 &data->res.seq_res,
3730 task);
1da177e4
LT		 3731}
3732
e4eff1a6 3733static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3734{
078ea3df
TM		 3735 struct nfs_unlinkdata *data = task->tk_calldata;
3736 struct nfs_removeres *res = &data->res;
e4eff1a6 3737
14516c3a
TM		 3738 if (!nfs4_sequence_done(task, &res->seq_res))
3739 return 0;
8478eaa1
N		 3740 if (nfs4_async_handle_error(task, res->server, NULL,
3741 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3742 return 0;
3743 update_changeattr(dir, &res->cinfo);
e4eff1a6 3744 return 1;
1da177e4
LT		 3745}
3746
d3d4152a
JL		 3747static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3748{
3749 struct nfs_server *server = NFS_SERVER(dir);
3750 struct nfs_renameargs *arg = msg->rpc_argp;
3751 struct nfs_renameres *res = msg->rpc_resp;
3752
3753 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3754 res->server = server;
a9c92d6b 3755 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3756}
3757
c6bfa1a1
BS		 3758static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3759{
d9afbd1b
TM		 3760 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3761 &data->args.seq_args,
3762 &data->res.seq_res,
3763 task);
d3d4152a
JL		 3764}
3765
3766static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3767 struct inode *new_dir)
3768{
fbc6f7c2
TM		 3769 struct nfs_renamedata *data = task->tk_calldata;
3770 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3771
3772 if (!nfs4_sequence_done(task, &res->seq_res))
3773 return 0;
8478eaa1 3774 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3775 return 0;
3776
3777 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3778 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3779 return 1;
3780}
3781
1da177e4
LT		 3782static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3783{
91ba2eee 3784 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3785 struct nfs4_link_arg arg = {
3786 .fh = NFS_FH(inode),
3787 .dir_fh = NFS_FH(dir),
3788 .name = name,
91ba2eee
TM		 3789 .bitmask = server->attr_bitmask,
3790 };
91ba2eee
TM		 3791 struct nfs4_link_res res = {
3792 .server = server,
1775fd3e 3793 .label = NULL,
1da177e4 3794 };
1da177e4
LT		 3795 struct rpc_message msg = {
3796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3797 .rpc_argp = &arg,
91ba2eee 3798 .rpc_resp = &res,
1da177e4 3799 };
136f2627
TM		 3800 int status = -ENOMEM;
3801
3802 res.fattr = nfs_alloc_fattr();
778d2817 3803 if (res.fattr == NULL)
136f2627 3804 goto out;
1da177e4 3805
14c43f76
DQ		 3806 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3807 if (IS_ERR(res.label)) {
3808 status = PTR_ERR(res.label);
3809 goto out;
3810 }
aa9c2669 3811 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3812
7c513058 3813 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3814 if (!status) {
3815 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3816 status = nfs_post_op_update_inode(inode, res.fattr);
3817 if (!status)
3818 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3819 }
14c43f76
DQ		 3820
3821
3822 nfs4_label_free(res.label);
3823
136f2627 3824out:
136f2627 3825 nfs_free_fattr(res.fattr);
1da177e4
LT		 3826 return status;
3827}
3828
3829static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3830{
3831 struct nfs4_exception exception = { };
3832 int err;
3833 do {
3834 err = nfs4_handle_exception(NFS_SERVER(inode),
3835 _nfs4_proc_link(inode, dir, name),
3836 &exception);
3837 } while (exception.retry);
3838 return err;
3839}
3840
57dc9a57
TM		 3841struct nfs4_createdata {
3842 struct rpc_message msg;
3843 struct nfs4_create_arg arg;
3844 struct nfs4_create_res res;
3845 struct nfs_fh fh;
3846 struct nfs_fattr fattr;
1775fd3e 3847 struct nfs4_label *label;
57dc9a57
TM		 3848};
3849
3850static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3851 struct qstr *name, struct iattr *sattr, u32 ftype)
3852{
3853 struct nfs4_createdata *data;
3854
3855 data = kzalloc(sizeof(*data), GFP_KERNEL);
3856 if (data != NULL) {
3857 struct nfs_server *server = NFS_SERVER(dir);
3858
14c43f76
DQ		 3859 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3860 if (IS_ERR(data->label))
3861 goto out_free;
3862
57dc9a57
TM		 3863 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3864 data->msg.rpc_argp = &data->arg;
3865 data->msg.rpc_resp = &data->res;
3866 data->arg.dir_fh = NFS_FH(dir);
3867 data->arg.server = server;
3868 data->arg.name = name;
3869 data->arg.attrs = sattr;
3870 data->arg.ftype = ftype;
aa9c2669 3871 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3872 data->res.server = server;
3873 data->res.fh = &data->fh;
3874 data->res.fattr = &data->fattr;
1775fd3e 3875 data->res.label = data->label;
57dc9a57 3876 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3877 }
3878 return data;
14c43f76
DQ		 3879out_free:
3880 kfree(data);
3881 return NULL;
57dc9a57
TM		 3882}
3883
3884static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3885{
7c513058 3886 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3887 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3888 if (status == 0) {
3889 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3890 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3891 }
3892 return status;
3893}
3894
3895static void nfs4_free_createdata(struct nfs4_createdata *data)
3896{
14c43f76 3897 nfs4_label_free(data->label);
57dc9a57
TM		 3898 kfree(data);
3899}
3900
4f390c15 3901static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3902 struct page *page, unsigned int len, struct iattr *sattr,
3903 struct nfs4_label *label)
1da177e4 3904{
57dc9a57
TM		 3905 struct nfs4_createdata *data;
3906 int status = -ENAMETOOLONG;
1da177e4 3907
94a6d753 3908 if (len > NFS4_MAXPATHLEN)
57dc9a57 3909 goto out;
4f390c15 3910
57dc9a57
TM		 3911 status = -ENOMEM;
3912 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3913 if (data == NULL)
3914 goto out;
3915
3916 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3917 data->arg.u.symlink.pages = &page;
3918 data->arg.u.symlink.len = len;
1775fd3e 3919 data->arg.label = label;
1da177e4 3920
57dc9a57
TM		 3921 status = nfs4_do_create(dir, dentry, data);
3922
3923 nfs4_free_createdata(data);
3924out:
1da177e4
LT		 3925 return status;
3926}
3927
4f390c15 3928static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3929 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3930{
3931 struct nfs4_exception exception = { };
aa9c2669 3932 struct nfs4_label l, *label = NULL;
1da177e4 3933 int err;
aa9c2669
DQ		 3934
3935 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3936
1da177e4 3937 do {
078ea3df
TM		 3938 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3939 trace_nfs4_symlink(dir, &dentry->d_name, err);
3940 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3941 &exception);
3942 } while (exception.retry);
aa9c2669
DQ		 3943
3944 nfs4_label_release_security(label);
1da177e4
LT		 3945 return err;
3946}
3947
3948static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3949 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3950{
57dc9a57
TM		 3951 struct nfs4_createdata *data;
3952 int status = -ENOMEM;
1da177e4 3953
57dc9a57
TM		 3954 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3955 if (data == NULL)
3956 goto out;
3957
1775fd3e 3958 data->arg.label = label;
57dc9a57
TM		 3959 status = nfs4_do_create(dir, dentry, data);
3960
3961 nfs4_free_createdata(data);
3962out:
1da177e4
LT		 3963 return status;
3964}
3965
3966static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3967 struct iattr *sattr)
3968{
3969 struct nfs4_exception exception = { };
aa9c2669 3970 struct nfs4_label l, *label = NULL;
1da177e4 3971 int err;
a8a5da99 3972
aa9c2669
DQ		 3973 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3974
a8a5da99 3975 sattr->ia_mode &= ~current_umask();
1da177e4 3976 do {
078ea3df
TM		 3977 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3978 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3979 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3980 &exception);
3981 } while (exception.retry);
aa9c2669
DQ		 3982 nfs4_label_release_security(label);
3983
1da177e4
LT		 3984 return err;
3985}
3986
3987static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3988 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3989{
2b0143b5 3990 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3991 struct nfs4_readdir_arg args = {
3992 .fh = NFS_FH(dir),
56e4ebf8 3993 .pages = pages,
1da177e4
LT		 3994 .pgbase = 0,
3995 .count = count,
2b0143b5 3996 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3997 .plus = plus,
1da177e4
LT		 3998 };
3999 struct nfs4_readdir_res res;
4000 struct rpc_message msg = {
4001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4002 .rpc_argp = &args,
4003 .rpc_resp = &res,
4004 .rpc_cred = cred,
4005 };
4006 int status;
4007
6de1472f
AV		 4008 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4009 dentry,
eadf4598 4010 (unsigned long long)cookie);
c3f52af3 4011 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4012 res.pgbase = args.pgbase;
7c513058 4013 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4014 if (status >= 0) {
c3f52af3 4015 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4016 status += args.pgbase;
4017 }
c4812998
TM		 4018
4019 nfs_invalidate_atime(dir);
4020
3110ff80 4021 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4022 return status;
4023}
4024
4025static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4026 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4027{
4028 struct nfs4_exception exception = { };
4029 int err;
4030 do {
c1578b76
TM		 4031 err = _nfs4_proc_readdir(dentry, cred, cookie,
4032 pages, count, plus);
2b0143b5
DH		 4033 trace_nfs4_readdir(d_inode(dentry), err);
4034 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4035 &exception);
4036 } while (exception.retry);
4037 return err;
4038}
4039
4040static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4041 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4042{
57dc9a57
TM		 4043 struct nfs4_createdata *data;
4044 int mode = sattr->ia_mode;
4045 int status = -ENOMEM;
1da177e4 4046
57dc9a57
TM		 4047 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4048 if (data == NULL)
4049 goto out;
4050
1da177e4 4051 if (S_ISFIFO(mode))
57dc9a57 4052 data->arg.ftype = NF4FIFO;
1da177e4 4053 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4054 data->arg.ftype = NF4BLK;
4055 data->arg.u.device.specdata1 = MAJOR(rdev);
4056 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4057 }
4058 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4059 data->arg.ftype = NF4CHR;
4060 data->arg.u.device.specdata1 = MAJOR(rdev);
4061 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4062 } else if (!S_ISSOCK(mode)) {
4063 status = -EINVAL;
4064 goto out_free;
1da177e4 4065 }
1775fd3e 4066
aa9c2669 4067 data->arg.label = label;
57dc9a57 4068 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4069out_free:
57dc9a57
TM		 4070 nfs4_free_createdata(data);
4071out:
1da177e4
LT		 4072 return status;
4073}
4074
4075static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4076 struct iattr *sattr, dev_t rdev)
4077{
4078 struct nfs4_exception exception = { };
aa9c2669 4079 struct nfs4_label l, *label = NULL;
1da177e4 4080 int err;
a8a5da99 4081
aa9c2669
DQ		 4082 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4083
a8a5da99 4084 sattr->ia_mode &= ~current_umask();
1da177e4 4085 do {
078ea3df
TM		 4086 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4087 trace_nfs4_mknod(dir, &dentry->d_name, err);
4088 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4089 &exception);
4090 } while (exception.retry);
aa9c2669
DQ		 4091
4092 nfs4_label_release_security(label);
4093
1da177e4
LT		 4094 return err;
4095}
4096
4097static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4098 struct nfs_fsstat *fsstat)
4099{
4100 struct nfs4_statfs_arg args = {
4101 .fh = fhandle,
4102 .bitmask = server->attr_bitmask,
4103 };
24ad148a
BH		 4104 struct nfs4_statfs_res res = {
4105 .fsstat = fsstat,
4106 };
1da177e4
LT		 4107 struct rpc_message msg = {
4108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4109 .rpc_argp = &args,
24ad148a 4110 .rpc_resp = &res,
1da177e4
LT		 4111 };
4112
0e574af1 4113 nfs_fattr_init(fsstat->fattr);
7c513058 4114 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4115}
4116
4117static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4118{
4119 struct nfs4_exception exception = { };
4120 int err;
4121 do {
4122 err = nfs4_handle_exception(server,
4123 _nfs4_proc_statfs(server, fhandle, fsstat),
4124 &exception);
4125 } while (exception.retry);
4126 return err;
4127}
4128
4129static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4130 struct nfs_fsinfo *fsinfo)
4131{
4132 struct nfs4_fsinfo_arg args = {
4133 .fh = fhandle,
4134 .bitmask = server->attr_bitmask,
4135 };
3dda5e43
BH		 4136 struct nfs4_fsinfo_res res = {
4137 .fsinfo = fsinfo,
4138 };
1da177e4
LT		 4139 struct rpc_message msg = {
4140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4141 .rpc_argp = &args,
3dda5e43 4142 .rpc_resp = &res,
1da177e4
LT		 4143 };
4144
7c513058 4145 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4146}
4147
4148static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4149{
4150 struct nfs4_exception exception = { };
83ca7f5a 4151 unsigned long now = jiffies;
1da177e4
LT		 4152 int err;
4153
4154 do {
83ca7f5a 4155 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4156 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4157 if (err == 0) {
4158 struct nfs_client *clp = server->nfs_client;
4159
4160 spin_lock(&clp->cl_lock);
4161 clp->cl_lease_time = fsinfo->lease_time * HZ;
4162 clp->cl_last_renewal = now;
4163 spin_unlock(&clp->cl_lock);
4164 break;
4165 }
4166 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4167 } while (exception.retry);
4168 return err;
4169}
4170
4171static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4172{
e38eb650
BS		 4173 int error;
4174
0e574af1 4175 nfs_fattr_init(fsinfo->fattr);
e38eb650 4176 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4177 if (error == 0) {
4178 /* block layout checks this! */
4179 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4180 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4181 }
e38eb650
BS		 4182
4183 return error;
1da177e4
LT		 4184}
4185
4186static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4187 struct nfs_pathconf *pathconf)
4188{
4189 struct nfs4_pathconf_arg args = {
4190 .fh = fhandle,
4191 .bitmask = server->attr_bitmask,
4192 };
d45b2989
BH		 4193 struct nfs4_pathconf_res res = {
4194 .pathconf = pathconf,
4195 };
1da177e4
LT		 4196 struct rpc_message msg = {
4197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4198 .rpc_argp = &args,
d45b2989 4199 .rpc_resp = &res,
1da177e4
LT		 4200 };
4201
4202 /* None of the pathconf attributes are mandatory to implement */
4203 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4204 memset(pathconf, 0, sizeof(*pathconf));
4205 return 0;
4206 }
4207
0e574af1 4208 nfs_fattr_init(pathconf->fattr);
7c513058 4209 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4210}
4211
4212static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4213 struct nfs_pathconf *pathconf)
4214{
4215 struct nfs4_exception exception = { };
4216 int err;
4217
4218 do {
4219 err = nfs4_handle_exception(server,
4220 _nfs4_proc_pathconf(server, fhandle, pathconf),
4221 &exception);
4222 } while (exception.retry);
4223 return err;
4224}
4225
5521abfd 4226int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4227 const struct nfs_open_context *ctx,
4228 const struct nfs_lock_context *l_ctx,
4229 fmode_t fmode)
4230{
4231 const struct nfs_lockowner *lockowner = NULL;
4232
4233 if (l_ctx != NULL)
4234 lockowner = &l_ctx->lockowner;
5521abfd 4235 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4236}
4237EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4238
5521abfd
TM		 4239static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4240 const struct nfs_open_context *ctx,
4241 const struct nfs_lock_context *l_ctx,
4242 fmode_t fmode)
4243{
4244 nfs4_stateid current_stateid;
4245
e1253be0
TM		 4246 /* If the current stateid represents a lost lock, then exit */
4247 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4248 return true;
5521abfd
TM		 4249 return nfs4_stateid_match(stateid, &current_stateid);
4250}
4251
4252static bool nfs4_error_stateid_expired(int err)
4253{
4254 switch (err) {
4255 case -NFS4ERR_DELEG_REVOKED:
4256 case -NFS4ERR_ADMIN_REVOKED:
4257 case -NFS4ERR_BAD_STATEID:
4258 case -NFS4ERR_STALE_STATEID:
4259 case -NFS4ERR_OLD_STATEID:
4260 case -NFS4ERR_OPENMODE:
4261 case -NFS4ERR_EXPIRED:
4262 return true;
4263 }
4264 return false;
4265}
4266
d45f60c6 4267void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4268{
d45f60c6 4269 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4270}
4271
d45f60c6 4272static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4273{
d45f60c6 4274 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4275
d45f60c6
WAA		 4276 trace_nfs4_read(hdr, task->tk_status);
4277 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4278 hdr->args.context->state,
4279 NULL) == -EAGAIN) {
d00c5d43 4280 rpc_restart_call_prepare(task);
ec06c096 4281 return -EAGAIN;
1da177e4 4282 }
8850df99 4283
d45f60c6 4284 __nfs4_read_done_cb(hdr);
1da177e4 4285 if (task->tk_status > 0)
d45f60c6 4286 renew_lease(server, hdr->timestamp);
ec06c096 4287 return 0;
1da177e4
LT		 4288}
4289
5521abfd 4290static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4291 struct nfs_pgio_args *args)
5521abfd
TM		 4292{
4293
4294 if (!nfs4_error_stateid_expired(task->tk_status) ||
4295 nfs4_stateid_is_current(&args->stateid,
4296 args->context,
4297 args->lock_context,
4298 FMODE_READ))
4299 return false;
4300 rpc_restart_call_prepare(task);
4301 return true;
4302}
4303
d45f60c6 4304static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4305{
4306
4307 dprintk("--> %s\n", __func__);
4308
d45f60c6 4309 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4310 return -EAGAIN;
d45f60c6 4311 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4312 return -EAGAIN;
d45f60c6
WAA		 4313 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4314 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4315}
4316
d45f60c6
WAA		 4317static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4318 struct rpc_message *msg)
1da177e4 4319{
d45f60c6
WAA		 4320 hdr->timestamp = jiffies;
4321 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4322 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4323 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4324}
4325
d45f60c6
WAA		 4326static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4327 struct nfs_pgio_header *hdr)
ea7c3303 4328{
d45f60c6
WAA		 4329 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4330 &hdr->args.seq_args,
4331 &hdr->res.seq_res,
9b206149 4332 task))
ef1820f9 4333 return 0;
d45f60c6
WAA		 4334 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4335 hdr->args.lock_context,
4336 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4337 return -EIO;
d45f60c6 4338 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4339 return -EIO;
4340 return 0;
1da177e4
LT		 4341}
4342
d45f60c6
WAA		 4343static int nfs4_write_done_cb(struct rpc_task *task,
4344 struct nfs_pgio_header *hdr)
1da177e4 4345{
d45f60c6 4346 struct inode *inode = hdr->inode;
8478eaa1 4347
d45f60c6
WAA		 4348 trace_nfs4_write(hdr, task->tk_status);
4349 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4350 hdr->args.context->state,
4351 NULL) == -EAGAIN) {
d00c5d43 4352 rpc_restart_call_prepare(task);
788e7a89 4353 return -EAGAIN;
1da177e4 4354 }
4f9838c7 4355 if (task->tk_status >= 0) {
d45f60c6 4356 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4357 nfs_writeback_update_inode(hdr);
4f9838c7 4358 }
788e7a89 4359 return 0;
1da177e4
LT		 4360}
4361
5521abfd 4362static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4363 struct nfs_pgio_args *args)
5521abfd
TM		 4364{
4365
4366 if (!nfs4_error_stateid_expired(task->tk_status) ||
4367 nfs4_stateid_is_current(&args->stateid,
4368 args->context,
4369 args->lock_context,
4370 FMODE_WRITE))
4371 return false;
4372 rpc_restart_call_prepare(task);
4373 return true;
4374}
4375
d45f60c6 4376static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4377{
d45f60c6 4378 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4379 return -EAGAIN;
d45f60c6 4380 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4381 return -EAGAIN;
d45f60c6
WAA		 4382 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4383 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4384}
4385
5a37f851 4386static
d45f60c6 4387bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4388{
5a37f851 4389 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4390 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4391 return false;
4392 /* Otherwise, request attributes if and only if we don't hold
4393 * a delegation
4394 */
011e2a7f 4395 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4396}
a69aef14 4397
d45f60c6
WAA		 4398static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4399 struct rpc_message *msg)
1da177e4 4400{
d45f60c6 4401 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4402
d45f60c6
WAA		 4403 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4404 hdr->args.bitmask = NULL;
4405 hdr->res.fattr = NULL;
7ffd1064 4406 } else
d45f60c6 4407 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4408
d45f60c6
WAA		 4409 if (!hdr->pgio_done_cb)
4410 hdr->pgio_done_cb = nfs4_write_done_cb;
4411 hdr->res.server = server;
4412 hdr->timestamp = jiffies;
1da177e4 4413
bdc7f021 4414 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4415 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4416}
4417
0b7c0153 4418static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4419{
d9afbd1b
TM		 4420 nfs4_setup_sequence(NFS_SERVER(data->inode),
4421 &data->args.seq_args,
4422 &data->res.seq_res,
4423 task);
1da177e4
LT		 4424}
4425
0b7c0153 4426static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4427{
1da177e4 4428 struct inode *inode = data->inode;
14516c3a 4429
cc668ab3 4430 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4431 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4432 NULL, NULL) == -EAGAIN) {
d00c5d43 4433 rpc_restart_call_prepare(task);
788e7a89 4434 return -EAGAIN;
1da177e4 4435 }
788e7a89 4436 return 0;
1da177e4
LT		 4437}
4438
0b7c0153 4439static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4440{
4441 if (!nfs4_sequence_done(task, &data->res.seq_res))
4442 return -EAGAIN;
0b7c0153 4443 return data->commit_done_cb(task, data);
5f452431
FI		 4444}
4445
0b7c0153 4446static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4447{
788e7a89 4448 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4449
0b7c0153
FI		 4450 if (data->commit_done_cb == NULL)
4451 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4452 data->res.server = server;
bdc7f021 4453 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4454 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4455}
4456
9bc4e3ca
CL		 4457struct nfs4_renewdata {
4458 struct nfs_client *client;
4459 unsigned long timestamp;
4460};
4461
1da177e4
LT		 4462/*
4463 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4464 * standalone procedure for queueing an asynchronous RENEW.
4465 */
9bc4e3ca 4466static void nfs4_renew_release(void *calldata)
dc96aef9 4467{
9bc4e3ca
CL		 4468 struct nfs4_renewdata *data = calldata;
4469 struct nfs_client *clp = data->client;
dc96aef9 4470
0851de06
AB		 4471 if (atomic_read(&clp->cl_count) > 1)
4472 nfs4_schedule_state_renewal(clp);
4473 nfs_put_client(clp);
9bc4e3ca 4474 kfree(data);
dc96aef9
AB		 4475}
4476
9bc4e3ca 4477static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4478{
9bc4e3ca
CL		 4479 struct nfs4_renewdata *data = calldata;
4480 struct nfs_client *clp = data->client;
4481 unsigned long timestamp = data->timestamp;
1da177e4 4482
c6d01c6f 4483 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4484 switch (task->tk_status) {
4485 case 0:
4486 break;
4487 case -NFS4ERR_LEASE_MOVED:
4488 nfs4_schedule_lease_moved_recovery(clp);
4489 break;
4490 default:
95baa25c 4491 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4492 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4493 return;
4494 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4495 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4496 return;
4497 }
4498 nfs4_schedule_path_down_recovery(clp);
1da177e4 4499 }
452e9352 4500 do_renew_lease(clp, timestamp);
1da177e4
LT		 4501}
4502
963d8fe5
TM		 4503static const struct rpc_call_ops nfs4_renew_ops = {
4504 .rpc_call_done = nfs4_renew_done,
dc96aef9 4505 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4506};
4507
2f60ea6b 4508static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4509{
4510 struct rpc_message msg = {
4511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4512 .rpc_argp = clp,
b4454fe1 4513 .rpc_cred = cred,
1da177e4 4514 };
9bc4e3ca 4515 struct nfs4_renewdata *data;
1da177e4 4516
2f60ea6b
TM		 4517 if (renew_flags == 0)
4518 return 0;
0851de06
AB		 4519 if (!atomic_inc_not_zero(&clp->cl_count))
4520 return -EIO;
b569ad34 4521 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4522 if (data == NULL)
4523 return -ENOMEM;
4524 data->client = clp;
4525 data->timestamp = jiffies;
bc7a05ca 4526 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4527 &nfs4_renew_ops, data);
1da177e4
LT		 4528}
4529
8534d4ec 4530static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4531{
4532 struct rpc_message msg = {
4533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4534 .rpc_argp = clp,
b4454fe1 4535 .rpc_cred = cred,
1da177e4
LT		 4536 };
4537 unsigned long now = jiffies;
4538 int status;
4539
bc7a05ca 4540 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4541 if (status < 0)
4542 return status;
452e9352 4543 do_renew_lease(clp, now);
1da177e4
LT		 4544 return 0;
4545}
4546
aa1870af
BF		 4547static inline int nfs4_server_supports_acls(struct nfs_server *server)
4548{
7dd7d959 4549 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4550}
4551
21f498c2
TM		 4552/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4553 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4554 * the stack.
4555 */
21f498c2 4556#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4557
e9e3d724
NH		 4558static int buf_to_pages_noslab(const void *buf, size_t buflen,
4559 struct page **pages, unsigned int *pgbase)
4560{
4561 struct page *newpage, **spages;
4562 int rc = 0;
4563 size_t len;
4564 spages = pages;
4565
4566 do {
21f498c2 4567 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4568 newpage = alloc_page(GFP_KERNEL);
4569
4570 if (newpage == NULL)
4571 goto unwind;
4572 memcpy(page_address(newpage), buf, len);
4573 buf += len;
4574 buflen -= len;
4575 *pages++ = newpage;
4576 rc++;
4577 } while (buflen != 0);
4578
4579 return rc;
4580
4581unwind:
4582 for(; rc > 0; rc--)
4583 __free_page(spages[rc-1]);
4584 return -ENOMEM;
4585}
4586
e50a1c2e
BF		 4587struct nfs4_cached_acl {
4588 int cached;
4589 size_t len;
3e9d4154 4590 char data[0];
e50a1c2e
BF		 4591};
4592
4593static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4594{
4595 struct nfs_inode *nfsi = NFS_I(inode);
4596
4597 spin_lock(&inode->i_lock);
4598 kfree(nfsi->nfs4_acl);
4599 nfsi->nfs4_acl = acl;
4600 spin_unlock(&inode->i_lock);
4601}
4602
4603static void nfs4_zap_acl_attr(struct inode *inode)
4604{
4605 nfs4_set_cached_acl(inode, NULL);
4606}
4607
4608static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4609{
4610 struct nfs_inode *nfsi = NFS_I(inode);
4611 struct nfs4_cached_acl *acl;
4612 int ret = -ENOENT;
4613
4614 spin_lock(&inode->i_lock);
4615 acl = nfsi->nfs4_acl;
4616 if (acl == NULL)
4617 goto out;
4618 if (buf == NULL) /* user is just asking for length */
4619 goto out_len;
4620 if (acl->cached == 0)
4621 goto out;
4622 ret = -ERANGE; /* see getxattr(2) man page */
4623 if (acl->len > buflen)
4624 goto out;
4625 memcpy(buf, acl->data, acl->len);
4626out_len:
4627 ret = acl->len;
4628out:
4629 spin_unlock(&inode->i_lock);
4630 return ret;
4631}
4632
5794d21e 4633static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4634{
4635 struct nfs4_cached_acl *acl;
b291f1b1 4636 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4637
1f1ea6c2 4638 if (buflen <= PAGE_SIZE) {
b291f1b1 4639 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4640 if (acl == NULL)
4641 goto out;
4642 acl->cached = 1;
5794d21e 4643 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4644 } else {
4645 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4646 if (acl == NULL)
4647 goto out;
4648 acl->cached = 0;
4649 }
4650 acl->len = acl_len;
4651out:
4652 nfs4_set_cached_acl(inode, acl);
4653}
4654
bf118a34
AA		 4655/*
4656 * The getxattr API returns the required buffer length when called with a
4657 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4658 * the required buf. On a NULL buf, we send a page of data to the server
4659 * guessing that the ACL request can be serviced by a page. If so, we cache
4660 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4661 * the cache. If not so, we throw away the page, and cache the required
4662 * length. The next getxattr call will then produce another round trip to
4663 * the server, this time with the input buf of the required size.
4664 */
16b4289c 4665static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4666{
bf118a34 4667 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4668 struct nfs_getaclargs args = {
4669 .fh = NFS_FH(inode),
4670 .acl_pages = pages,
4671 .acl_len = buflen,
4672 };
663c79b3
BH		 4673 struct nfs_getaclres res = {
4674 .acl_len = buflen,
4675 };
aa1870af
BF		 4676 struct rpc_message msg = {
4677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4678 .rpc_argp = &args,
663c79b3 4679 .rpc_resp = &res,
aa1870af 4680 };
21f498c2
TM		 4681 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4682 int ret = -ENOMEM, i;
aa1870af 4683
bf118a34
AA		 4684 /* As long as we're doing a round trip to the server anyway,
4685 * let's be prepared for a page of acl data. */
4686 if (npages == 0)
4687 npages = 1;
21f498c2
TM		 4688 if (npages > ARRAY_SIZE(pages))
4689 return -ERANGE;
5a006899 4690
bf118a34
AA		 4691 for (i = 0; i < npages; i++) {
4692 pages[i] = alloc_page(GFP_KERNEL);
4693 if (!pages[i])
4694 goto out_free;
e50a1c2e 4695 }
5a006899
SP		 4696
4697 /* for decoding across pages */
4698 res.acl_scratch = alloc_page(GFP_KERNEL);
4699 if (!res.acl_scratch)
4700 goto out_free;
4701
bf118a34
AA		 4702 args.acl_len = npages * PAGE_SIZE;
4703 args.acl_pgbase = 0;
5a006899 4704
de040bec 4705 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4706 __func__, buf, buflen, npages, args.acl_len);
4707 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4708 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4709 if (ret)
4710 goto out_free;
bf118a34 4711
1f1ea6c2
TM		 4712 /* Handle the case where the passed-in buffer is too short */
4713 if (res.acl_flags & NFS4_ACL_TRUNC) {
4714 /* Did the user only issue a request for the acl length? */
4715 if (buf == NULL)
4716 goto out_ok;
e50a1c2e 4717 ret = -ERANGE;
1f1ea6c2 4718 goto out_free;
e50a1c2e 4719 }
1f1ea6c2 4720 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4721 if (buf) {
4722 if (res.acl_len > buflen) {
4723 ret = -ERANGE;
4724 goto out_free;
4725 }
1f1ea6c2 4726 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4727 }
1f1ea6c2
TM		 4728out_ok:
4729 ret = res.acl_len;
e50a1c2e 4730out_free:
bf118a34
AA		 4731 for (i = 0; i < npages; i++)
4732 if (pages[i])
4733 __free_page(pages[i]);
331818f1
TM		 4734 if (res.acl_scratch)
4735 __free_page(res.acl_scratch);
aa1870af
BF		 4736 return ret;
4737}
4738
16b4289c
TM		 4739static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4740{
4741 struct nfs4_exception exception = { };
4742 ssize_t ret;
4743 do {
4744 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4745 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4746 if (ret >= 0)
4747 break;
4748 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4749 } while (exception.retry);
4750 return ret;
4751}
4752
e50a1c2e
BF		 4753static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4754{
4755 struct nfs_server *server = NFS_SERVER(inode);
4756 int ret;
4757
4758 if (!nfs4_server_supports_acls(server))
4759 return -EOPNOTSUPP;
4760 ret = nfs_revalidate_inode(server, inode);
4761 if (ret < 0)
4762 return ret;
08a22b39
AK		 4763 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4764 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4765 ret = nfs4_read_cached_acl(inode, buf, buflen);
4766 if (ret != -ENOENT)
bf118a34
AA		 4767 /* -ENOENT is returned if there is no ACL or if there is an ACL
4768 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4769 return ret;
4770 return nfs4_get_acl_uncached(inode, buf, buflen);
4771}
4772
16b4289c 4773static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4774{
4775 struct nfs_server *server = NFS_SERVER(inode);
4776 struct page *pages[NFS4ACL_MAXPAGES];
4777 struct nfs_setaclargs arg = {
4778 .fh = NFS_FH(inode),
4779 .acl_pages = pages,
4780 .acl_len = buflen,
4781 };
73c403a9 4782 struct nfs_setaclres res;
4b580ee3
BF		 4783 struct rpc_message msg = {
4784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4785 .rpc_argp = &arg,
73c403a9 4786 .rpc_resp = &res,
4b580ee3 4787 };
21f498c2 4788 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4789 int ret, i;
4b580ee3
BF		 4790
4791 if (!nfs4_server_supports_acls(server))
4792 return -EOPNOTSUPP;
21f498c2
TM		 4793 if (npages > ARRAY_SIZE(pages))
4794 return -ERANGE;
e9e3d724
NH		 4795 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4796 if (i < 0)
4797 return i;
57ec14c5 4798 nfs4_inode_return_delegation(inode);
7c513058 4799 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4800
4801 /*
4802 * Free each page after tx, so the only ref left is
4803 * held by the network stack
4804 */
4805 for (; i > 0; i--)
4806 put_page(pages[i-1]);
4807
08a22b39
AK		 4808 /*
4809 * Acl update can result in inode attribute update.
4810 * so mark the attribute cache invalid.
4811 */
4812 spin_lock(&inode->i_lock);
4813 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4814 spin_unlock(&inode->i_lock);
f41f7418
TM		 4815 nfs_access_zap_cache(inode);
4816 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4817 return ret;
4818}
4819
16b4289c
TM		 4820static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4821{
4822 struct nfs4_exception exception = { };
4823 int err;
4824 do {
c1578b76
TM		 4825 err = __nfs4_proc_set_acl(inode, buf, buflen);
4826 trace_nfs4_set_acl(inode, err);
4827 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4828 &exception);
4829 } while (exception.retry);
4830 return err;
4831}
4832
aa9c2669
DQ		 4833#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4834static int _nfs4_get_security_label(struct inode *inode, void *buf,
4835 size_t buflen)
4836{
4837 struct nfs_server *server = NFS_SERVER(inode);
4838 struct nfs_fattr fattr;
4839 struct nfs4_label label = {0, 0, buflen, buf};
4840
4841 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4842 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4843 .fh = NFS_FH(inode),
4844 .bitmask = bitmask,
4845 };
4846 struct nfs4_getattr_res res = {
4847 .fattr = &fattr,
4848 .label = &label,
4849 .server = server,
4850 };
4851 struct rpc_message msg = {
4852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4853 .rpc_argp = &arg,
aa9c2669
DQ		 4854 .rpc_resp = &res,
4855 };
4856 int ret;
4857
4858 nfs_fattr_init(&fattr);
4859
fcb63a9b 4860 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4861 if (ret)
4862 return ret;
4863 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4864 return -ENOENT;
4865 if (buflen < label.len)
4866 return -ERANGE;
4867 return 0;
4868}
4869
4870static int nfs4_get_security_label(struct inode *inode, void *buf,
4871 size_t buflen)
4872{
4873 struct nfs4_exception exception = { };
4874 int err;
4875
4876 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4877 return -EOPNOTSUPP;
4878
4879 do {
c1578b76
TM		 4880 err = _nfs4_get_security_label(inode, buf, buflen);
4881 trace_nfs4_get_security_label(inode, err);
4882 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4883 &exception);
4884 } while (exception.retry);
4885 return err;
4886}
4887
4888static int _nfs4_do_set_security_label(struct inode *inode,
4889 struct nfs4_label *ilabel,
4890 struct nfs_fattr *fattr,
4891 struct nfs4_label *olabel)
4892{
4893
4894 struct iattr sattr = {0};
4895 struct nfs_server *server = NFS_SERVER(inode);
4896 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4897 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4898 .fh = NFS_FH(inode),
4899 .iap = &sattr,
4900 .server = server,
4901 .bitmask = bitmask,
4902 .label = ilabel,
4903 };
4904 struct nfs_setattrres res = {
4905 .fattr = fattr,
4906 .label = olabel,
4907 .server = server,
4908 };
4909 struct rpc_message msg = {
4910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4911 .rpc_argp = &arg,
aa9c2669
DQ		 4912 .rpc_resp = &res,
4913 };
4914 int status;
4915
12207f69 4916 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4917
12207f69 4918 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4919 if (status)
4920 dprintk("%s failed: %d\n", __func__, status);
4921
4922 return status;
4923}
4924
4925static int nfs4_do_set_security_label(struct inode *inode,
4926 struct nfs4_label *ilabel,
4927 struct nfs_fattr *fattr,
4928 struct nfs4_label *olabel)
4929{
4930 struct nfs4_exception exception = { };
4931 int err;
4932
4933 do {
c1578b76
TM		 4934 err = _nfs4_do_set_security_label(inode, ilabel,
4935 fattr, olabel);
4936 trace_nfs4_set_security_label(inode, err);
4937 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4938 &exception);
4939 } while (exception.retry);
4940 return err;
4941}
4942
4943static int
4944nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4945{
4946 struct nfs4_label ilabel, *olabel = NULL;
4947 struct nfs_fattr fattr;
4948 struct rpc_cred *cred;
2b0143b5 4949 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4950 int status;
4951
4952 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4953 return -EOPNOTSUPP;
4954
4955 nfs_fattr_init(&fattr);
4956
4957 ilabel.pi = 0;
4958 ilabel.lfs = 0;
4959 ilabel.label = (char *)buf;
4960 ilabel.len = buflen;
4961
4962 cred = rpc_lookup_cred();
4963 if (IS_ERR(cred))
4964 return PTR_ERR(cred);
4965
4966 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4967 if (IS_ERR(olabel)) {
4968 status = -PTR_ERR(olabel);
4969 goto out;
4970 }
4971
4972 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4973 if (status == 0)
4974 nfs_setsecurity(inode, &fattr, olabel);
4975
4976 nfs4_label_free(olabel);
4977out:
4978 put_rpccred(cred);
4979 return status;
4980}
4981#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4982
4983
1da177e4 4984static int
8478eaa1
N		 4985nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4986 struct nfs4_state *state, long *timeout)
1da177e4 4987{
aa5190d0
TM		 4988 struct nfs_client *clp = server->nfs_client;
4989
4990 if (task->tk_status >= 0)
1da177e4
LT		 4991 return 0;
4992 switch(task->tk_status) {
a1d0b5ee 4993 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4994 case -NFS4ERR_ADMIN_REVOKED:
4995 case -NFS4ERR_BAD_STATEID:
4996 case -NFS4ERR_OPENMODE:
4997 if (state == NULL)
4998 break;
5d422301 4999 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 5000 goto recovery_failed;
0400a6b0 5001 goto wait_on_recovery;
0ced63d1 5002 case -NFS4ERR_EXPIRED:
5d422301
TM		 5003 if (state != NULL) {
5004 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 5005 goto recovery_failed;
5d422301 5006 }
1da177e4 5007 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5008 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 5009 nfs4_schedule_lease_recovery(clp);
5010 goto wait_on_recovery;
519ae255
CL		 5011 case -NFS4ERR_MOVED:
5012 if (nfs4_schedule_migration_recovery(server) < 0)
5013 goto recovery_failed;
5014 goto wait_on_recovery;
8ef2f8d4
CL		 5015 case -NFS4ERR_LEASE_MOVED:
5016 nfs4_schedule_lease_moved_recovery(clp);
5017 goto wait_on_recovery;
4745e315
AA		 5018#if defined(CONFIG_NFS_V4_1)
5019 case -NFS4ERR_BADSESSION:
5020 case -NFS4ERR_BADSLOT:
5021 case -NFS4ERR_BAD_HIGH_SLOT:
5022 case -NFS4ERR_DEADSESSION:
5023 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5024 case -NFS4ERR_SEQ_FALSE_RETRY:
5025 case -NFS4ERR_SEQ_MISORDERED:
5026 dprintk("%s ERROR %d, Reset session\n", __func__,
5027 task->tk_status);
9f594791 5028 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 5029 goto wait_on_recovery;
4745e315 5030#endif /* CONFIG_NFS_V4_1 */
1da177e4 5031 case -NFS4ERR_DELAY:
aa5190d0 5032 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 5033 rpc_delay(task, nfs4_update_delay(timeout));
5034 goto restart_call;
006ea73e 5035 case -NFS4ERR_GRACE:
1da177e4 5036 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 5037 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 5038 case -NFS4ERR_OLD_STATEID:
f1478c13 5039 goto restart_call;
1da177e4
LT		 5040 }
5041 task->tk_status = nfs4_map_errors(task->tk_status);
5042 return 0;
9f51a78e 5043recovery_failed:
5d422301
TM		 5044 task->tk_status = -EIO;
5045 return 0;
0400a6b0 5046wait_on_recovery:
a2c0b9e2 5047 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 5048 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5049 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 5050 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5051 goto recovery_failed;
f1478c13 5052restart_call:
a2c0b9e2
TM		 5053 task->tk_status = 0;
5054 return -EAGAIN;
1da177e4
LT		 5055}
5056
f092075d
CL		 5057static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5058 nfs4_verifier *bootverf)
cd93710e
CL		 5059{
5060 __be32 verf[2];
5061
2c820d9a
CL		 5062 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5063 /* An impossible timestamp guarantees this value
5064 * will never match a generated boot time. */
5065 verf[0] = 0;
17f26b12 5066 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5067 } else {
f092075d 5068 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5069 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5070 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5071 }
cd93710e
CL		 5072 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5073}
5074
a3192688
JL		 5075static int
5076nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5077{
a3192688
JL		 5078 int result;
5079 size_t len;
5080 char *str;
e984a55a 5081
ceb3a16c 5082 if (clp->cl_owner_id != NULL)
a3192688 5083 return 0;
4a3e5779 5084
a3192688 5085 rcu_read_lock();
4a70316c 5086 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5087 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5088 1 +
5089 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5090 1;
5091 rcu_read_unlock();
5092
5093 if (len > NFS4_OPAQUE_LIMIT + 1)
5094 return -EINVAL;
5095
5096 /*
5097 * Since this string is allocated at mount time, and held until the
5098 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5099 * about a memory-reclaim deadlock.
5100 */
5101 str = kmalloc(len, GFP_KERNEL);
5102 if (!str)
5103 return -ENOMEM;
ceb3a16c 5104
e984a55a 5105 rcu_read_lock();
a3192688
JL		 5106 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5107 clp->cl_ipaddr,
5108 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5109 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5110 rcu_read_unlock();
a3192688 5111
a3192688
JL		 5112 clp->cl_owner_id = str;
5113 return 0;
e984a55a
CL		 5114}
5115
873e3851
JL		 5116static int
5117nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5118{
5119 int result;
5120 size_t len;
5121 char *str;
5122
5123 len = 10 + 10 + 1 + 10 + 1 +
5124 strlen(nfs4_client_id_uniquifier) + 1 +
5125 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5126
5127 if (len > NFS4_OPAQUE_LIMIT + 1)
5128 return -EINVAL;
5129
5130 /*
5131 * Since this string is allocated at mount time, and held until the
5132 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5133 * about a memory-reclaim deadlock.
5134 */
5135 str = kmalloc(len, GFP_KERNEL);
5136 if (!str)
5137 return -ENOMEM;
5138
5139 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5140 clp->rpc_ops->version, clp->cl_minorversion,
5141 nfs4_client_id_uniquifier,
5142 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5143 clp->cl_owner_id = str;
5144 return 0;
5145}
5146
5147static int
5148nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5149{
873e3851
JL		 5150 int result;
5151 size_t len;
5152 char *str;
ceb3a16c
TM		 5153
5154 if (clp->cl_owner_id != NULL)
873e3851 5155 return 0;
6f2ea7f2
CL		 5156
5157 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5158 return nfs4_init_uniquifier_client_string(clp);
5159
5160 len = 10 + 10 + 1 + 10 + 1 +
5161 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5162
5163 if (len > NFS4_OPAQUE_LIMIT + 1)
5164 return -EINVAL;
5165
5166 /*
5167 * Since this string is allocated at mount time, and held until the
5168 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5169 * about a memory-reclaim deadlock.
5170 */
5171 str = kmalloc(len, GFP_KERNEL);
5172 if (!str)
5173 return -ENOMEM;
5174
5175 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5176 clp->rpc_ops->version, clp->cl_minorversion,
5177 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5178 clp->cl_owner_id = str;
5179 return 0;
e984a55a
CL		 5180}
5181
706cb8db
CL		 5182/*
5183 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5184 * services. Advertise one based on the address family of the
5185 * clientaddr.
5186 */
5187static unsigned int
5188nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5189{
5190 if (strchr(clp->cl_ipaddr, ':') != NULL)
5191 return scnprintf(buf, len, "tcp6");
5192 else
5193 return scnprintf(buf, len, "tcp");
5194}
5195
f11b2a1c
JL		 5196static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5197{
5198 struct nfs4_setclientid *sc = calldata;
5199
5200 if (task->tk_status == 0)
5201 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5202}
5203
5204static const struct rpc_call_ops nfs4_setclientid_ops = {
5205 .rpc_call_done = nfs4_setclientid_done,
5206};
5207
6bbb4ae8
CL		 5208/**
5209 * nfs4_proc_setclientid - Negotiate client ID
5210 * @clp: state data structure
5211 * @program: RPC program for NFSv4 callback service
5212 * @port: IP port number for NFS4 callback service
5213 * @cred: RPC credential to use for this call
5214 * @res: where to place the result
5215 *
5216 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5217 */
bb8b27e5
TM		 5218int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5219 unsigned short port, struct rpc_cred *cred,
5220 struct nfs4_setclientid_res *res)
1da177e4
LT		 5221{
5222 nfs4_verifier sc_verifier;
5223 struct nfs4_setclientid setclientid = {
5224 .sc_verifier = &sc_verifier,
5225 .sc_prog = program,
3a6bb738 5226 .sc_clnt = clp,
1da177e4
LT		 5227 };
5228 struct rpc_message msg = {
5229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5230 .rpc_argp = &setclientid,
bb8b27e5 5231 .rpc_resp = res,
286d7d6a 5232 .rpc_cred = cred,
1da177e4 5233 };
f11b2a1c
JL		 5234 struct rpc_task *task;
5235 struct rpc_task_setup task_setup_data = {
5236 .rpc_client = clp->cl_rpcclient,
5237 .rpc_message = &msg,
5238 .callback_ops = &nfs4_setclientid_ops,
5239 .callback_data = &setclientid,
5240 .flags = RPC_TASK_TIMEOUT,
5241 };
6bbb4ae8 5242 int status;
1da177e4 5243
de734831 5244 /* nfs_client_id4 */
f092075d 5245 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5246
5247 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5248 status = nfs4_init_uniform_client_string(clp);
5249 else
a3192688 5250 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5251
5252 if (status)
5253 goto out;
3a6bb738 5254
de734831 5255 /* cb_client4 */
706cb8db
CL		 5256 setclientid.sc_netid_len =
5257 nfs4_init_callback_netid(clp,
5258 setclientid.sc_netid,
5259 sizeof(setclientid.sc_netid));
de734831 5260 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5261 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5262 clp->cl_ipaddr, port >> 8, port & 255);
5263
3a6bb738 5264 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5265 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5266 clp->cl_owner_id);
f11b2a1c
JL		 5267 task = rpc_run_task(&task_setup_data);
5268 if (IS_ERR(task)) {
5269 status = PTR_ERR(task);
5270 goto out;
5271 }
5272 status = task->tk_status;
5273 if (setclientid.sc_cred) {
5274 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5275 put_rpccred(setclientid.sc_cred);
5276 }
5277 rpc_put_task(task);
5278out:
c6d01c6f 5279 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5280 dprintk("NFS reply setclientid: %d\n", status);
5281 return status;
1da177e4
LT		 5282}
5283
6bbb4ae8
CL		 5284/**
5285 * nfs4_proc_setclientid_confirm - Confirm client ID
5286 * @clp: state data structure
5287 * @res: result of a previous SETCLIENTID
5288 * @cred: RPC credential to use for this call
5289 *
5290 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5291 */
fd954ae1 5292int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5293 struct nfs4_setclientid_res *arg,
5294 struct rpc_cred *cred)
1da177e4 5295{
1da177e4
LT		 5296 struct rpc_message msg = {
5297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5298 .rpc_argp = arg,
286d7d6a 5299 .rpc_cred = cred,
1da177e4 5300 };
1da177e4
LT		 5301 int status;
5302
6bbb4ae8
CL		 5303 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5304 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5305 clp->cl_clientid);
1bd714f2 5306 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5307 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5308 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5309 return status;
5310}
5311
fe650407
TM		 5312struct nfs4_delegreturndata {
5313 struct nfs4_delegreturnargs args;
fa178f29 5314 struct nfs4_delegreturnres res;
fe650407
TM		 5315 struct nfs_fh fh;
5316 nfs4_stateid stateid;
26e976a8 5317 unsigned long timestamp;
fa178f29 5318 struct nfs_fattr fattr;
fe650407 5319 int rpc_status;
039b756a
PT		 5320 struct inode *inode;
5321 bool roc;
5322 u32 roc_barrier;
fe650407
TM		 5323};
5324
fe650407
TM		 5325static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5326{
5327 struct nfs4_delegreturndata *data = calldata;
938e1010 5328
14516c3a
TM		 5329 if (!nfs4_sequence_done(task, &data->res.seq_res))
5330 return;
938e1010 5331
ca8acf8d 5332 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5333 switch (task->tk_status) {
79708861 5334 case 0:
fa178f29 5335 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5336 case -NFS4ERR_ADMIN_REVOKED:
5337 case -NFS4ERR_DELEG_REVOKED:
5338 case -NFS4ERR_BAD_STATEID:
5339 case -NFS4ERR_OLD_STATEID:
5340 case -NFS4ERR_STALE_STATEID:
5341 case -NFS4ERR_EXPIRED:
5342 task->tk_status = 0;
039b756a
PT		 5343 if (data->roc)
5344 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5345 break;
79708861 5346 default:
8478eaa1
N		 5347 if (nfs4_async_handle_error(task, data->res.server,
5348 NULL, NULL) == -EAGAIN) {
d00c5d43 5349 rpc_restart_call_prepare(task);
79708861
RL		 5350 return;
5351 }
5352 }
5353 data->rpc_status = task->tk_status;
fe650407
TM		 5354}
5355
5356static void nfs4_delegreturn_release(void *calldata)
5357{
039b756a 5358 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5359 struct inode *inode = data->inode;
039b756a 5360
ea7c38fe
TM		 5361 if (inode) {
5362 if (data->roc)
5363 pnfs_roc_release(inode);
5364 nfs_iput_and_deactive(inode);
5365 }
fe650407
TM		 5366 kfree(calldata);
5367}
5368
938e1010
AA		 5369static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5370{
5371 struct nfs4_delegreturndata *d_data;
5372
5373 d_data = (struct nfs4_delegreturndata *)data;
5374
500d701f
PT		 5375 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5376 return;
5377
4ff376fe
TM		 5378 if (d_data->roc)
5379 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5380
d9afbd1b
TM		 5381 nfs4_setup_sequence(d_data->res.server,
5382 &d_data->args.seq_args,
5383 &d_data->res.seq_res,
5384 task);
938e1010 5385}
938e1010 5386
c8d149f3 5387static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5388 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5389 .rpc_call_done = nfs4_delegreturn_done,
5390 .rpc_release = nfs4_delegreturn_release,
5391};
5392
e6f81075 5393static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5394{
5395 struct nfs4_delegreturndata *data;
fa178f29 5396 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5397 struct rpc_task *task;
5138fde0
TM		 5398 struct rpc_message msg = {
5399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5400 .rpc_cred = cred,
5401 };
c970aa85
TM		 5402 struct rpc_task_setup task_setup_data = {
5403 .rpc_client = server->client,
5138fde0 5404 .rpc_message = &msg,
c970aa85
TM		 5405 .callback_ops = &nfs4_delegreturn_ops,
5406 .flags = RPC_TASK_ASYNC,
5407 };
e6f81075 5408 int status = 0;
fe650407 5409
8535b2be 5410 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5411 if (data == NULL)
5412 return -ENOMEM;
a9c92d6b 5413 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5414 data->args.fhandle = &data->fh;
5415 data->args.stateid = &data->stateid;
9e907fec 5416 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5417 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5418 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5419 data->res.fattr = &data->fattr;
5420 data->res.server = server;
5138fde0 5421 nfs_fattr_init(data->res.fattr);
26e976a8 5422 data->timestamp = jiffies;
fe650407 5423 data->rpc_status = 0;
ea7c38fe
TM		 5424 data->inode = nfs_igrab_and_active(inode);
5425 if (data->inode)
5426 data->roc = nfs4_roc(inode);
fe650407 5427
c970aa85 5428 task_setup_data.callback_data = data;
1174dd1f
TM		 5429 msg.rpc_argp = &data->args;
5430 msg.rpc_resp = &data->res;
c970aa85 5431 task = rpc_run_task(&task_setup_data);
7a1218a2 5432 if (IS_ERR(task))
fe650407 5433 return PTR_ERR(task);
e6f81075
TM		 5434 if (!issync)
5435 goto out;
fe650407 5436 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5437 if (status != 0)
5438 goto out;
5439 status = data->rpc_status;
e144cbcc
TM		 5440 if (status == 0)
5441 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5442 else
5443 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5444out:
e6b3c4db 5445 rpc_put_task(task);
fe650407 5446 return status;
1da177e4
LT		 5447}
5448
e6f81075 5449int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5450{
5451 struct nfs_server *server = NFS_SERVER(inode);
5452 struct nfs4_exception exception = { };
5453 int err;
5454 do {
e6f81075 5455 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5456 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5457 switch (err) {
5458 case -NFS4ERR_STALE_STATEID:
5459 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5460 case 0:
5461 return 0;
5462 }
5463 err = nfs4_handle_exception(server, err, &exception);
5464 } while (exception.retry);
5465 return err;
5466}
5467
5468#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5469#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5470
5471/*
5472 * sleep, with exponential backoff, and retry the LOCK operation.
5473 */
5474static unsigned long
5475nfs4_set_lock_task_retry(unsigned long timeout)
5476{
416ad3c9 5477 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5478 timeout <<= 1;
5479 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5480 return NFS4_LOCK_MAXTIMEOUT;
5481 return timeout;
5482}
5483
1da177e4
LT		 5484static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5485{
5486 struct inode *inode = state->inode;
5487 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5488 struct nfs_client *clp = server->nfs_client;
911d1aaf 5489 struct nfs_lockt_args arg = {
1da177e4 5490 .fh = NFS_FH(inode),
911d1aaf 5491 .fl = request,
1da177e4 5492 };
911d1aaf
TM		 5493 struct nfs_lockt_res res = {
5494 .denied = request,
1da177e4
LT		 5495 };
5496 struct rpc_message msg = {
5497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5498 .rpc_argp = &arg,
5499 .rpc_resp = &res,
5500 .rpc_cred = state->owner->so_cred,
5501 };
1da177e4
LT		 5502 struct nfs4_lock_state *lsp;
5503 int status;
5504
911d1aaf 5505 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5506 status = nfs4_set_lock_state(state, request);
5507 if (status != 0)
5508 goto out;
5509 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5510 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5511 arg.lock_owner.s_dev = server->s_dev;
7c513058 5512 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5513 switch (status) {
5514 case 0:
5515 request->fl_type = F_UNLCK;
5516 break;
5517 case -NFS4ERR_DENIED:
5518 status = 0;
1da177e4 5519 }
70cc6487 5520 request->fl_ops->fl_release_private(request);
a6f951dd 5521 request->fl_ops = NULL;
8d0a8a9d 5522out:
1da177e4
LT		 5523 return status;
5524}
5525
5526static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5527{
5528 struct nfs4_exception exception = { };
5529 int err;
5530
5531 do {
d1b748a5
TM		 5532 err = _nfs4_proc_getlk(state, cmd, request);
5533 trace_nfs4_get_lock(request, state, cmd, err);
5534 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5535 &exception);
5536 } while (exception.retry);
5537 return err;
5538}
5539
83bfff23 5540static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5541{
5542 int res = 0;
5543 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5544 case FL_POSIX:
83bfff23 5545 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5546 break;
5547 case FL_FLOCK:
83bfff23 5548 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5549 break;
5550 default:
5551 BUG();
5552 }
1da177e4
LT		 5553 return res;
5554}
5555
faf5f49c 5556struct nfs4_unlockdata {
911d1aaf
TM		 5557 struct nfs_locku_args arg;
5558 struct nfs_locku_res res;
faf5f49c
TM		 5559 struct nfs4_lock_state *lsp;
5560 struct nfs_open_context *ctx;
911d1aaf
TM		 5561 struct file_lock fl;
5562 const struct nfs_server *server;
26e976a8 5563 unsigned long timestamp;
faf5f49c
TM		 5564};
5565
911d1aaf
TM		 5566static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5567 struct nfs_open_context *ctx,
5568 struct nfs4_lock_state *lsp,
5569 struct nfs_seqid *seqid)
5570{
5571 struct nfs4_unlockdata *p;
5572 struct inode *inode = lsp->ls_state->inode;
5573
8535b2be 5574 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5575 if (p == NULL)
5576 return NULL;
5577 p->arg.fh = NFS_FH(inode);
5578 p->arg.fl = &p->fl;
5579 p->arg.seqid = seqid;
c1d51931 5580 p->res.seqid = seqid;
911d1aaf
TM		 5581 p->lsp = lsp;
5582 atomic_inc(&lsp->ls_count);
5583 /* Ensure we don't close file until we're done freeing locks! */
5584 p->ctx = get_nfs_open_context(ctx);
5585 memcpy(&p->fl, fl, sizeof(p->fl));
5586 p->server = NFS_SERVER(inode);
5587 return p;
5588}
5589
06f814a3 5590static void nfs4_locku_release_calldata(void *data)
faf5f49c 5591{
963d8fe5 5592 struct nfs4_unlockdata *calldata = data;
911d1aaf 5593 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5594 nfs4_put_lock_state(calldata->lsp);
5595 put_nfs_open_context(calldata->ctx);
5596 kfree(calldata);
faf5f49c
TM		 5597}
5598
963d8fe5 5599static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5600{
963d8fe5 5601 struct nfs4_unlockdata *calldata = data;
faf5f49c 5602
14516c3a
TM		 5603 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5604 return;
faf5f49c
TM		 5605 switch (task->tk_status) {
5606 case 0:
26e976a8 5607 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5608 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5609 if (nfs4_update_lock_stateid(calldata->lsp,
5610 &calldata->res.stateid))
5611 break;
9e33bed5
TM		 5612 case -NFS4ERR_BAD_STATEID:
5613 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5614 case -NFS4ERR_STALE_STATEID:
5615 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5616 if (!nfs4_stateid_match(&calldata->arg.stateid,
5617 &calldata->lsp->ls_stateid))
5618 rpc_restart_call_prepare(task);
faf5f49c
TM		 5619 break;
5620 default:
8478eaa1
N		 5621 if (nfs4_async_handle_error(task, calldata->server,
5622 NULL, NULL) == -EAGAIN)
d00c5d43 5623 rpc_restart_call_prepare(task);
faf5f49c 5624 }
2b1bc308 5625 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5626}
5627
4ce70ada 5628static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5629{
4ce70ada 5630 struct nfs4_unlockdata *calldata = data;
faf5f49c 5631
911d1aaf 5632 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5633 goto out_wait;
425c1d4e 5634 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5635 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5636 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5637 goto out_no_action;
faf5f49c 5638 }
26e976a8 5639 calldata->timestamp = jiffies;
035168ab 5640 if (nfs4_setup_sequence(calldata->server,
a893693c 5641 &calldata->arg.seq_args,
2240a9e2
TM		 5642 &calldata->res.seq_res,
5643 task) != 0)
5644 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5645 return;
5646out_no_action:
5647 task->tk_action = NULL;
5648out_wait:
5649 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5650}
5651
963d8fe5 5652static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5653 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5654 .rpc_call_done = nfs4_locku_done,
06f814a3 5655 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5656};
5657
a5d16a4d
TM		 5658static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5659 struct nfs_open_context *ctx,
5660 struct nfs4_lock_state *lsp,
5661 struct nfs_seqid *seqid)
5662{
5663 struct nfs4_unlockdata *data;
5138fde0
TM		 5664 struct rpc_message msg = {
5665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5666 .rpc_cred = ctx->cred,
5667 };
c970aa85
TM		 5668 struct rpc_task_setup task_setup_data = {
5669 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5670 .rpc_message = &msg,
c970aa85 5671 .callback_ops = &nfs4_locku_ops,
101070ca 5672 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5673 .flags = RPC_TASK_ASYNC,
5674 };
a5d16a4d 5675
fa940720
WAA		 5676 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5677 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5678
137d6aca
FF		 5679 /* Ensure this is an unlock - when canceling a lock, the
5680 * canceled lock is passed in, and it won't be an unlock.
5681 */
5682 fl->fl_type = F_UNLCK;
5683
a5d16a4d
TM		 5684 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5685 if (data == NULL) {
5686 nfs_free_seqid(seqid);
5687 return ERR_PTR(-ENOMEM);
5688 }
5689
a9c92d6b 5690 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5691 msg.rpc_argp = &data->arg;
5692 msg.rpc_resp = &data->res;
c970aa85
TM		 5693 task_setup_data.callback_data = data;
5694 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5695}
5696
faf5f49c
TM		 5697static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5698{
65b62a29
TM		 5699 struct inode *inode = state->inode;
5700 struct nfs4_state_owner *sp = state->owner;
5701 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5702 struct nfs_seqid *seqid;
1da177e4 5703 struct nfs4_lock_state *lsp;
06f814a3 5704 struct rpc_task *task;
b4019c0e 5705 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5706 int status = 0;
536ff0f8 5707 unsigned char fl_flags = request->fl_flags;
faf5f49c 5708
8d0a8a9d 5709 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5710 /* Unlock _before_ we do the RPC call */
5711 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5712 /* Exclude nfs_delegation_claim_locks() */
5713 mutex_lock(&sp->so_delegreturn_mutex);
5714 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5715 down_read(&nfsi->rwsem);
83bfff23 5716 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5717 up_read(&nfsi->rwsem);
65b62a29 5718 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5719 goto out;
19e03c57
TM		 5720 }
5721 up_read(&nfsi->rwsem);
65b62a29 5722 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5723 if (status != 0)
9b073574
TM		 5724 goto out;
5725 /* Is this a delegated lock? */
8d0a8a9d 5726 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5727 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5728 goto out;
b4019c0e
TM		 5729 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5730 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5731 status = -ENOMEM;
badc76dd 5732 if (IS_ERR(seqid))
9b073574 5733 goto out;
cd3758e3 5734 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5735 status = PTR_ERR(task);
5736 if (IS_ERR(task))
9b073574 5737 goto out;
a5d16a4d 5738 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5739 rpc_put_task(task);
9b073574 5740out:
536ff0f8 5741 request->fl_flags = fl_flags;
d1b748a5 5742 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5743 return status;
5744}
5745
a5d16a4d
TM		 5746struct nfs4_lockdata {
5747 struct nfs_lock_args arg;
5748 struct nfs_lock_res res;
5749 struct nfs4_lock_state *lsp;
5750 struct nfs_open_context *ctx;
5751 struct file_lock fl;
26e976a8 5752 unsigned long timestamp;
a5d16a4d
TM		 5753 int rpc_status;
5754 int cancelled;
66179efe 5755 struct nfs_server *server;
a5d16a4d
TM		 5756};
5757
5758static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5759 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5760 gfp_t gfp_mask)
1da177e4 5761{
a5d16a4d
TM		 5762 struct nfs4_lockdata *p;
5763 struct inode *inode = lsp->ls_state->inode;
1da177e4 5764 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5765 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5766
8535b2be 5767 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5768 if (p == NULL)
5769 return NULL;
5770
5771 p->arg.fh = NFS_FH(inode);
5772 p->arg.fl = &p->fl;
8535b2be 5773 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5774 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5775 goto out_free;
b4019c0e
TM		 5776 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5777 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5778 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5779 goto out_free_seqid;
7539bbab 5780 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5781 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5782 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5783 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5784 p->lsp = lsp;
66179efe 5785 p->server = server;
a5d16a4d
TM		 5786 atomic_inc(&lsp->ls_count);
5787 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5788 get_file(fl->fl_file);
a5d16a4d
TM		 5789 memcpy(&p->fl, fl, sizeof(p->fl));
5790 return p;
2f74c0a0
TM		 5791out_free_seqid:
5792 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5793out_free:
5794 kfree(p);
5795 return NULL;
5796}
5797
5798static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5799{
5800 struct nfs4_lockdata *data = calldata;
5801 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5802
3110ff80 5803 dprintk("%s: begin!\n", __func__);
2f74c0a0 5804 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5805 goto out_wait;
a5d16a4d 5806 /* Do we need to do an open_to_lock_owner? */
6b447539 5807 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5808 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5809 goto out_release_lock_seqid;
8fe72bac 5810 }
425c1d4e
TM		 5811 nfs4_stateid_copy(&data->arg.open_stateid,
5812 &state->open_stateid);
a5d16a4d 5813 data->arg.new_lock_owner = 1;
c1d51931 5814 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5815 } else {
2f74c0a0 5816 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5817 nfs4_stateid_copy(&data->arg.lock_stateid,
5818 &data->lsp->ls_stateid);
5819 }
5d422301
TM		 5820 if (!nfs4_valid_open_stateid(state)) {
5821 data->rpc_status = -EBADF;
5822 task->tk_action = NULL;
5823 goto out_release_open_seqid;
5824 }
26e976a8 5825 data->timestamp = jiffies;
035168ab
TM		 5826 if (nfs4_setup_sequence(data->server,
5827 &data->arg.seq_args,
2240a9e2 5828 &data->res.seq_res,
d9afbd1b 5829 task) == 0)
66179efe 5830 return;
5d422301 5831out_release_open_seqid:
2240a9e2
TM		 5832 nfs_release_seqid(data->arg.open_seqid);
5833out_release_lock_seqid:
5834 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5835out_wait:
5836 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5837 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5838}
5839
a5d16a4d
TM		 5840static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5841{
5842 struct nfs4_lockdata *data = calldata;
39071e6f 5843 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5844
3110ff80 5845 dprintk("%s: begin!\n", __func__);
a5d16a4d 5846
14516c3a
TM		 5847 if (!nfs4_sequence_done(task, &data->res.seq_res))
5848 return;
66179efe 5849
a5d16a4d 5850 data->rpc_status = task->tk_status;
425c1d4e
TM		 5851 switch (task->tk_status) {
5852 case 0:
2b0143b5 5853 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5854 data->timestamp);
c69899a1
TM		 5855 if (data->arg.new_lock) {
5856 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5857 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5858 rpc_restart_call_prepare(task);
5859 break;
5860 }
5861 }
39071e6f
TM		 5862 if (data->arg.new_lock_owner != 0) {
5863 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5864 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5865 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5866 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5867 rpc_restart_call_prepare(task);
425c1d4e
TM		 5868 break;
5869 case -NFS4ERR_BAD_STATEID:
5870 case -NFS4ERR_OLD_STATEID:
5871 case -NFS4ERR_STALE_STATEID:
5872 case -NFS4ERR_EXPIRED:
5873 if (data->arg.new_lock_owner != 0) {
5874 if (!nfs4_stateid_match(&data->arg.open_stateid,
5875 &lsp->ls_state->open_stateid))
5876 rpc_restart_call_prepare(task);
5877 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5878 &lsp->ls_stateid))
5879 rpc_restart_call_prepare(task);
a5d16a4d 5880 }
3110ff80 5881 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5882}
5883
5884static void nfs4_lock_release(void *calldata)
5885{
5886 struct nfs4_lockdata *data = calldata;
5887
3110ff80 5888 dprintk("%s: begin!\n", __func__);
2f74c0a0 5889 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5890 if (data->cancelled != 0) {
5891 struct rpc_task *task;
5892 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5893 data->arg.lock_seqid);
5894 if (!IS_ERR(task))
bf294b41 5895 rpc_put_task_async(task);
3110ff80 5896 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5897 } else
5898 nfs_free_seqid(data->arg.lock_seqid);
5899 nfs4_put_lock_state(data->lsp);
5900 put_nfs_open_context(data->ctx);
feaff8e5 5901 fput(data->fl.fl_file);
a5d16a4d 5902 kfree(data);
3110ff80 5903 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5904}
5905
5906static const struct rpc_call_ops nfs4_lock_ops = {
5907 .rpc_call_prepare = nfs4_lock_prepare,
5908 .rpc_call_done = nfs4_lock_done,
5909 .rpc_release = nfs4_lock_release,
5910};
5911
2bee72a6
TM		 5912static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5913{
2bee72a6
TM		 5914 switch (error) {
5915 case -NFS4ERR_ADMIN_REVOKED:
5916 case -NFS4ERR_BAD_STATEID:
ecac799a 5917 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5918 if (new_lock_owner != 0 ||
795a88c9 5919 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5920 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5921 break;
5922 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5923 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5924 case -NFS4ERR_EXPIRED:
5925 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5926 };
5927}
5928
afe6c27c 5929static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5930{
5931 struct nfs4_lockdata *data;
5932 struct rpc_task *task;
5138fde0
TM		 5933 struct rpc_message msg = {
5934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5935 .rpc_cred = state->owner->so_cred,
5936 };
c970aa85
TM		 5937 struct rpc_task_setup task_setup_data = {
5938 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5939 .rpc_message = &msg,
c970aa85 5940 .callback_ops = &nfs4_lock_ops,
101070ca 5941 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5942 .flags = RPC_TASK_ASYNC,
5943 };
a5d16a4d
TM		 5944 int ret;
5945
3110ff80 5946 dprintk("%s: begin!\n", __func__);
cd3758e3 5947 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5948 fl->fl_u.nfs4_fl.owner,
5949 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5950 if (data == NULL)
5951 return -ENOMEM;
5952 if (IS_SETLKW(cmd))
5953 data->arg.block = 1;
a9c92d6b 5954 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5955 msg.rpc_argp = &data->arg;
5956 msg.rpc_resp = &data->res;
c970aa85 5957 task_setup_data.callback_data = data;
8fe72bac
TM		 5958 if (recovery_type > NFS_LOCK_NEW) {
5959 if (recovery_type == NFS_LOCK_RECLAIM)
5960 data->arg.reclaim = NFS_LOCK_RECLAIM;
5961 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5962 } else
5963 data->arg.new_lock = 1;
c970aa85 5964 task = rpc_run_task(&task_setup_data);
7a1218a2 5965 if (IS_ERR(task))
a5d16a4d 5966 return PTR_ERR(task);
a5d16a4d
TM		 5967 ret = nfs4_wait_for_completion_rpc_task(task);
5968 if (ret == 0) {
5969 ret = data->rpc_status;
2bee72a6
TM		 5970 if (ret)
5971 nfs4_handle_setlk_error(data->server, data->lsp,
5972 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5973 } else
5974 data->cancelled = 1;
e6b3c4db 5975 rpc_put_task(task);
3110ff80 5976 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5977 return ret;
1da177e4
LT		 5978}
5979
5980static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5981{
202b50dc 5982 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5983 struct nfs4_exception exception = {
5984 .inode = state->inode,
5985 };
202b50dc
TM		 5986 int err;
5987
5988 do {
42a2d13e
TM		 5989 /* Cache the lock if possible... */
5990 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5991 return 0;
afe6c27c 5992 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5993 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5994 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5995 break;
5996 nfs4_handle_exception(server, err, &exception);
5997 } while (exception.retry);
5998 return err;
1da177e4
LT		 5999}
6000
6001static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6002{
202b50dc 6003 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6004 struct nfs4_exception exception = {
6005 .inode = state->inode,
6006 };
202b50dc
TM		 6007 int err;
6008
6bfc93ef
TM		 6009 err = nfs4_set_lock_state(state, request);
6010 if (err != 0)
6011 return err;
f6de7a39 6012 if (!recover_lost_locks) {
ef1820f9
N		 6013 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6014 return 0;
6015 }
202b50dc 6016 do {
42a2d13e
TM		 6017 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6018 return 0;
afe6c27c 6019 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 6020 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 6021 switch (err) {
6022 default:
6023 goto out;
6024 case -NFS4ERR_GRACE:
6025 case -NFS4ERR_DELAY:
6026 nfs4_handle_exception(server, err, &exception);
6027 err = 0;
6028 }
202b50dc 6029 } while (exception.retry);
a9ed2e25 6030out:
202b50dc 6031 return err;
1da177e4
LT		 6032}
6033
f062eb6c 6034#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6035/**
6036 * nfs41_check_expired_locks - possibly free a lock stateid
6037 *
6038 * @state: NFSv4 state for an inode
6039 *
6040 * Returns NFS_OK if recovery for this stateid is now finished.
6041 * Otherwise a negative NFS4ERR value is returned.
6042 */
b01dd1d8 6043static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6044{
eb64cf96 6045 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6046 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6047 struct nfs_server *server = NFS_SERVER(state->inode);
6048
b01dd1d8 6049 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6050 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6051 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6052
6053 status = nfs41_test_stateid(server,
6054 &lsp->ls_stateid,
6055 cred);
08cb47fa 6056 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6057 if (status != NFS_OK) {
3e60ffdd
CL		 6058 /* Free the stateid unless the server
6059 * informs us the stateid is unrecognized. */
89af2739
CL		 6060 if (status != -NFS4ERR_BAD_STATEID)
6061 nfs41_free_stateid(server,
ab7cb0df
TM		 6062 &lsp->ls_stateid,
6063 cred);
795a88c9 6064 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6065 ret = status;
6066 }
6067 }
6068 };
6069
6070 return ret;
6071}
6072
6073static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6074{
6075 int status = NFS_OK;
6076
6077 if (test_bit(LK_STATE_IN_USE, &state->flags))
6078 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6079 if (status != NFS_OK)
6080 status = nfs4_lock_expired(state, request);
6081 return status;
f062eb6c
BS		 6082}
6083#endif
6084
1da177e4
LT		 6085static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6086{
19e03c57 6087 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6088 unsigned char fl_flags = request->fl_flags;
8e469ebd 6089 int status = -ENOLCK;
1da177e4 6090
8e469ebd
TM		 6091 if ((fl_flags & FL_POSIX) &&
6092 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6093 goto out;
6bfc93ef 6094 /* Is this a delegated open? */
6bfc93ef
TM		 6095 status = nfs4_set_lock_state(state, request);
6096 if (status != 0)
6097 goto out;
01c3b861 6098 request->fl_flags |= FL_ACCESS;
83bfff23 6099 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6100 if (status < 0)
6101 goto out;
19e03c57 6102 down_read(&nfsi->rwsem);
01c3b861 6103 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6104 /* Yes: cache locks! */
01c3b861 6105 /* ...but avoid races with delegation recall... */
19e03c57 6106 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6107 status = do_vfs_lock(state->inode, request);
c69899a1 6108 up_read(&nfsi->rwsem);
9a99af49 6109 goto out;
9a99af49 6110 }
19e03c57 6111 up_read(&nfsi->rwsem);
c69899a1 6112 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6113out:
6114 request->fl_flags = fl_flags;
1da177e4
LT		 6115 return status;
6116}
6117
6118static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6119{
a1d0b5ee
TM		 6120 struct nfs4_exception exception = {
6121 .state = state,
05ffe24f 6122 .inode = state->inode,
a1d0b5ee 6123 };
1da177e4
LT		 6124 int err;
6125
6126 do {
965b5d67 6127 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6128 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6129 if (err == -NFS4ERR_DENIED)
6130 err = -EAGAIN;
1da177e4 6131 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6132 err, &exception);
1da177e4
LT		 6133 } while (exception.retry);
6134 return err;
6135}
6136
6137static int
6138nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6139{
6140 struct nfs_open_context *ctx;
6141 struct nfs4_state *state;
6142 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6143 int status;
6144
6145 /* verify open state */
cd3758e3 6146 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6147 state = ctx->state;
6148
6149 if (request->fl_start < 0 || request->fl_end < 0)
6150 return -EINVAL;
6151
d953126a
TM		 6152 if (IS_GETLK(cmd)) {
6153 if (state != NULL)
6154 return nfs4_proc_getlk(state, F_GETLK, request);
6155 return 0;
6156 }
1da177e4
LT		 6157
6158 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6159 return -EINVAL;
6160
d953126a
TM		 6161 if (request->fl_type == F_UNLCK) {
6162 if (state != NULL)
6163 return nfs4_proc_unlck(state, cmd, request);
6164 return 0;
6165 }
1da177e4 6166
d953126a
TM		 6167 if (state == NULL)
6168 return -ENOLCK;
55725513
TM		 6169 /*
6170 * Don't rely on the VFS having checked the file open mode,
6171 * since it won't do this for flock() locks.
6172 */
f44106e2 6173 switch (request->fl_type) {
55725513
TM		 6174 case F_RDLCK:
6175 if (!(filp->f_mode & FMODE_READ))
6176 return -EBADF;
6177 break;
6178 case F_WRLCK:
6179 if (!(filp->f_mode & FMODE_WRITE))
6180 return -EBADF;
6181 }
6182
1da177e4
LT		 6183 do {
6184 status = nfs4_proc_setlk(state, cmd, request);
6185 if ((status != -EAGAIN) || IS_SETLK(cmd))
6186 break;
6187 timeout = nfs4_set_lock_task_retry(timeout);
6188 status = -ERESTARTSYS;
6189 if (signalled())
6190 break;
6191 } while(status < 0);
1da177e4
LT		 6192 return status;
6193}
6194
db4f2e63 6195int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6196{
6197 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6198 int err;
6199
6200 err = nfs4_set_lock_state(state, fl);
6201 if (err != 0)
db4f2e63 6202 return err;
4a706fa0 6203 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6204 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6205}
6b3b5496 6206
cf470c3e
TM		 6207struct nfs_release_lockowner_data {
6208 struct nfs4_lock_state *lsp;
5ae67c4f 6209 struct nfs_server *server;
cf470c3e 6210 struct nfs_release_lockowner_args args;
b7e63a10 6211 struct nfs_release_lockowner_res res;
60ea6812 6212 unsigned long timestamp;
cf470c3e
TM		 6213};
6214
fbd4bfd1
CL		 6215static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6216{
6217 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6218 struct nfs_server *server = data->server;
cb04ad2a
PT		 6219 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6220 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6221 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6222 data->timestamp = jiffies;
fbd4bfd1
CL		 6223}
6224
6225static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6226{
6227 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6228 struct nfs_server *server = data->server;
6229
b7e63a10 6230 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6231
6232 switch (task->tk_status) {
6233 case 0:
6234 renew_lease(server, data->timestamp);
6235 break;
6236 case -NFS4ERR_STALE_CLIENTID:
6237 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6238 nfs4_schedule_lease_recovery(server->nfs_client);
6239 break;
60ea6812
CL		 6240 case -NFS4ERR_LEASE_MOVED:
6241 case -NFS4ERR_DELAY:
8478eaa1
N		 6242 if (nfs4_async_handle_error(task, server,
6243 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6244 rpc_restart_call_prepare(task);
6245 }
fbd4bfd1
CL		 6246}
6247
d3c7b7cc
TM		 6248static void nfs4_release_lockowner_release(void *calldata)
6249{
cf470c3e 6250 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6251 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6252 kfree(calldata);
6253}
6254
17280175 6255static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6256 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6257 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6258 .rpc_release = nfs4_release_lockowner_release,
6259};
6260
f1cdae87
JL		 6261static void
6262nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6263{
cf470c3e 6264 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6265 struct rpc_message msg = {
6266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6267 };
6268
6269 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6270 return;
fbd4bfd1 6271
cf470c3e
TM		 6272 data = kmalloc(sizeof(*data), GFP_NOFS);
6273 if (!data)
f1cdae87 6274 return;
cf470c3e 6275 data->lsp = lsp;
5ae67c4f 6276 data->server = server;
cf470c3e
TM		 6277 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6278 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6279 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6280
cf470c3e 6281 msg.rpc_argp = &data->args;
b7e63a10
TM		 6282 msg.rpc_resp = &data->res;
6283 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6284 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6285}
6286
aa1870af
BF		 6287#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6288
64c2ce8b
AK		 6289static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6290 const void *buf, size_t buflen,
6291 int flags, int type)
6b3b5496 6292{
64c2ce8b
AK		 6293 if (strcmp(key, "") != 0)
6294 return -EINVAL;
4b580ee3 6295
2b0143b5 6296 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6297}
6298
64c2ce8b
AK		 6299static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6300 void *buf, size_t buflen, int type)
6b3b5496 6301{
64c2ce8b
AK		 6302 if (strcmp(key, "") != 0)
6303 return -EINVAL;
aa1870af 6304
2b0143b5 6305 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6306}
6307
64c2ce8b
AK		 6308static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6309 size_t list_len, const char *name,
6310 size_t name_len, int type)
6b3b5496 6311{
64c2ce8b 6312 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6313
2b0143b5 6314 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6315 return 0;
64c2ce8b
AK		 6316
6317 if (list && len <= list_len)
6318 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6319 return len;
6b3b5496
BF		 6320}
6321
c9bccef6
DQ		 6322#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6323static inline int nfs4_server_supports_labels(struct nfs_server *server)
6324{
6325 return server->caps & NFS_CAP_SECURITY_LABEL;
6326}
6327
6328static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6329 const void *buf, size_t buflen,
6330 int flags, int type)
6331{
6332 if (security_ismaclabel(key))
6333 return nfs4_set_security_label(dentry, buf, buflen);
6334
6335 return -EOPNOTSUPP;
6336}
6337
6338static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6339 void *buf, size_t buflen, int type)
6340{
6341 if (security_ismaclabel(key))
2b0143b5 6342 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6343 return -EOPNOTSUPP;
6344}
6345
6346static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6347 size_t list_len, const char *name,
6348 size_t name_len, int type)
6349{
6350 size_t len = 0;
6351
2b0143b5
DH		 6352 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6353 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6354 if (list && len <= list_len)
2b0143b5 6355 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6356 }
6357 return len;
6358}
6359
6360static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6361 .prefix = XATTR_SECURITY_PREFIX,
6362 .list = nfs4_xattr_list_nfs4_label,
6363 .get = nfs4_xattr_get_nfs4_label,
6364 .set = nfs4_xattr_set_nfs4_label,
6365};
6366#endif
6367
6368
533eb461
AA		 6369/*
6370 * nfs_fhget will use either the mounted_on_fileid or the fileid
6371 */
69aaaae1
TM		 6372static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6373{
533eb461
AA		 6374 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6375 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6376 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6377 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6378 return;
6379
6380 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6381 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6382 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6383 fattr->nlink = 2;
6384}
6385
f05d147f
BS		 6386static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6387 const struct qstr *name,
6388 struct nfs4_fs_locations *fs_locations,
6389 struct page *page)
683b57b4
TM		 6390{
6391 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6392 u32 bitmask[3] = {
361e624f 6393 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6394 };
6395 struct nfs4_fs_locations_arg args = {
6396 .dir_fh = NFS_FH(dir),
c228fd3a 6397 .name = name,
683b57b4
TM		 6398 .page = page,
6399 .bitmask = bitmask,
6400 };
22958463
BH		 6401 struct nfs4_fs_locations_res res = {
6402 .fs_locations = fs_locations,
6403 };
683b57b4
TM		 6404 struct rpc_message msg = {
6405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6406 .rpc_argp = &args,
22958463 6407 .rpc_resp = &res,
683b57b4
TM		 6408 };
6409 int status;
6410
3110ff80 6411 dprintk("%s: start\n", __func__);
533eb461
AA		 6412
6413 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6414 * is not supported */
6415 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6416 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6417 else
6418 bitmask[0] |= FATTR4_WORD0_FILEID;
6419
c228fd3a 6420 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6421 fs_locations->server = server;
830b8e33 6422 fs_locations->nlocations = 0;
f05d147f 6423 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6424 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6425 return status;
6426}
6427
f05d147f
BS		 6428int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6429 const struct qstr *name,
6430 struct nfs4_fs_locations *fs_locations,
6431 struct page *page)
db0a9593
BS		 6432{
6433 struct nfs4_exception exception = { };
6434 int err;
6435 do {
078ea3df
TM		 6436 err = _nfs4_proc_fs_locations(client, dir, name,
6437 fs_locations, page);
6438 trace_nfs4_get_fs_locations(dir, name, err);
6439 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6440 &exception);
6441 } while (exception.retry);
6442 return err;
6443}
6444
b03d735b
CL		 6445/*
6446 * This operation also signals the server that this client is
6447 * performing migration recovery. The server can stop returning
6448 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6449 * appended to this compound to identify the client ID which is
6450 * performing recovery.
6451 */
6452static int _nfs40_proc_get_locations(struct inode *inode,
6453 struct nfs4_fs_locations *locations,
6454 struct page *page, struct rpc_cred *cred)
6455{
6456 struct nfs_server *server = NFS_SERVER(inode);
6457 struct rpc_clnt *clnt = server->client;
6458 u32 bitmask[2] = {
6459 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6460 };
6461 struct nfs4_fs_locations_arg args = {
6462 .clientid = server->nfs_client->cl_clientid,
6463 .fh = NFS_FH(inode),
6464 .page = page,
6465 .bitmask = bitmask,
6466 .migration = 1, /* skip LOOKUP */
6467 .renew = 1, /* append RENEW */
6468 };
6469 struct nfs4_fs_locations_res res = {
6470 .fs_locations = locations,
6471 .migration = 1,
6472 .renew = 1,
6473 };
6474 struct rpc_message msg = {
6475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6476 .rpc_argp = &args,
6477 .rpc_resp = &res,
6478 .rpc_cred = cred,
6479 };
6480 unsigned long now = jiffies;
6481 int status;
6482
6483 nfs_fattr_init(&locations->fattr);
6484 locations->server = server;
6485 locations->nlocations = 0;
6486
6487 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6488 nfs4_set_sequence_privileged(&args.seq_args);
6489 status = nfs4_call_sync_sequence(clnt, server, &msg,
6490 &args.seq_args, &res.seq_res);
6491 if (status)
6492 return status;
6493
6494 renew_lease(server, now);
6495 return 0;
6496}
6497
6498#ifdef CONFIG_NFS_V4_1
6499
6500/*
6501 * This operation also signals the server that this client is
6502 * performing migration recovery. The server can stop asserting
6503 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6504 * performing this operation is identified in the SEQUENCE
6505 * operation in this compound.
6506 *
6507 * When the client supports GETATTR(fs_locations_info), it can
6508 * be plumbed in here.
6509 */
6510static int _nfs41_proc_get_locations(struct inode *inode,
6511 struct nfs4_fs_locations *locations,
6512 struct page *page, struct rpc_cred *cred)
6513{
6514 struct nfs_server *server = NFS_SERVER(inode);
6515 struct rpc_clnt *clnt = server->client;
6516 u32 bitmask[2] = {
6517 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6518 };
6519 struct nfs4_fs_locations_arg args = {
6520 .fh = NFS_FH(inode),
6521 .page = page,
6522 .bitmask = bitmask,
6523 .migration = 1, /* skip LOOKUP */
6524 };
6525 struct nfs4_fs_locations_res res = {
6526 .fs_locations = locations,
6527 .migration = 1,
6528 };
6529 struct rpc_message msg = {
6530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6531 .rpc_argp = &args,
6532 .rpc_resp = &res,
6533 .rpc_cred = cred,
6534 };
6535 int status;
6536
6537 nfs_fattr_init(&locations->fattr);
6538 locations->server = server;
6539 locations->nlocations = 0;
6540
6541 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6542 nfs4_set_sequence_privileged(&args.seq_args);
6543 status = nfs4_call_sync_sequence(clnt, server, &msg,
6544 &args.seq_args, &res.seq_res);
6545 if (status == NFS4_OK &&
6546 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6547 status = -NFS4ERR_LEASE_MOVED;
6548 return status;
6549}
6550
6551#endif /* CONFIG_NFS_V4_1 */
6552
6553/**
6554 * nfs4_proc_get_locations - discover locations for a migrated FSID
6555 * @inode: inode on FSID that is migrating
6556 * @locations: result of query
6557 * @page: buffer
6558 * @cred: credential to use for this operation
6559 *
6560 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6561 * operation failed, or a negative errno if a local error occurred.
6562 *
6563 * On success, "locations" is filled in, but if the server has
6564 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6565 * asserted.
6566 *
6567 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6568 * from this client that require migration recovery.
6569 */
6570int nfs4_proc_get_locations(struct inode *inode,
6571 struct nfs4_fs_locations *locations,
6572 struct page *page, struct rpc_cred *cred)
6573{
6574 struct nfs_server *server = NFS_SERVER(inode);
6575 struct nfs_client *clp = server->nfs_client;
6576 const struct nfs4_mig_recovery_ops *ops =
6577 clp->cl_mvops->mig_recovery_ops;
6578 struct nfs4_exception exception = { };
6579 int status;
6580
6581 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6582 (unsigned long long)server->fsid.major,
6583 (unsigned long long)server->fsid.minor,
6584 clp->cl_hostname);
6585 nfs_display_fhandle(NFS_FH(inode), __func__);
6586
6587 do {
6588 status = ops->get_locations(inode, locations, page, cred);
6589 if (status != -NFS4ERR_DELAY)
6590 break;
6591 nfs4_handle_exception(server, status, &exception);
6592 } while (exception.retry);
6593 return status;
6594}
6595
44c99933
CL		 6596/*
6597 * This operation also signals the server that this client is
6598 * performing "lease moved" recovery. The server can stop
6599 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6600 * is appended to this compound to identify the client ID which is
6601 * performing recovery.
6602 */
6603static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6604{
6605 struct nfs_server *server = NFS_SERVER(inode);
6606 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6607 struct rpc_clnt *clnt = server->client;
6608 struct nfs4_fsid_present_arg args = {
6609 .fh = NFS_FH(inode),
6610 .clientid = clp->cl_clientid,
6611 .renew = 1, /* append RENEW */
6612 };
6613 struct nfs4_fsid_present_res res = {
6614 .renew = 1,
6615 };
6616 struct rpc_message msg = {
6617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6618 .rpc_argp = &args,
6619 .rpc_resp = &res,
6620 .rpc_cred = cred,
6621 };
6622 unsigned long now = jiffies;
6623 int status;
6624
6625 res.fh = nfs_alloc_fhandle();
6626 if (res.fh == NULL)
6627 return -ENOMEM;
6628
6629 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6630 nfs4_set_sequence_privileged(&args.seq_args);
6631 status = nfs4_call_sync_sequence(clnt, server, &msg,
6632 &args.seq_args, &res.seq_res);
6633 nfs_free_fhandle(res.fh);
6634 if (status)
6635 return status;
6636
6637 do_renew_lease(clp, now);
6638 return 0;
6639}
6640
6641#ifdef CONFIG_NFS_V4_1
6642
6643/*
6644 * This operation also signals the server that this client is
6645 * performing "lease moved" recovery. The server can stop asserting
6646 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6647 * this operation is identified in the SEQUENCE operation in this
6648 * compound.
6649 */
6650static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6651{
6652 struct nfs_server *server = NFS_SERVER(inode);
6653 struct rpc_clnt *clnt = server->client;
6654 struct nfs4_fsid_present_arg args = {
6655 .fh = NFS_FH(inode),
6656 };
6657 struct nfs4_fsid_present_res res = {
6658 };
6659 struct rpc_message msg = {
6660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6661 .rpc_argp = &args,
6662 .rpc_resp = &res,
6663 .rpc_cred = cred,
6664 };
6665 int status;
6666
6667 res.fh = nfs_alloc_fhandle();
6668 if (res.fh == NULL)
6669 return -ENOMEM;
6670
6671 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6672 nfs4_set_sequence_privileged(&args.seq_args);
6673 status = nfs4_call_sync_sequence(clnt, server, &msg,
6674 &args.seq_args, &res.seq_res);
6675 nfs_free_fhandle(res.fh);
6676 if (status == NFS4_OK &&
6677 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6678 status = -NFS4ERR_LEASE_MOVED;
6679 return status;
6680}
6681
6682#endif /* CONFIG_NFS_V4_1 */
6683
6684/**
6685 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6686 * @inode: inode on FSID to check
6687 * @cred: credential to use for this operation
6688 *
6689 * Server indicates whether the FSID is present, moved, or not
6690 * recognized. This operation is necessary to clear a LEASE_MOVED
6691 * condition for this client ID.
6692 *
6693 * Returns NFS4_OK if the FSID is present on this server,
6694 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6695 * NFS4ERR code if some error occurred on the server, or a
6696 * negative errno if a local failure occurred.
6697 */
6698int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6699{
6700 struct nfs_server *server = NFS_SERVER(inode);
6701 struct nfs_client *clp = server->nfs_client;
6702 const struct nfs4_mig_recovery_ops *ops =
6703 clp->cl_mvops->mig_recovery_ops;
6704 struct nfs4_exception exception = { };
6705 int status;
6706
6707 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6708 (unsigned long long)server->fsid.major,
6709 (unsigned long long)server->fsid.minor,
6710 clp->cl_hostname);
6711 nfs_display_fhandle(NFS_FH(inode), __func__);
6712
6713 do {
6714 status = ops->fsid_present(inode, cred);
6715 if (status != -NFS4ERR_DELAY)
6716 break;
6717 nfs4_handle_exception(server, status, &exception);
6718 } while (exception.retry);
6719 return status;
6720}
6721
5ec16a85 6722/**
a5250def
WAA		 6723 * If 'use_integrity' is true and the state managment nfs_client
6724 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6725 * and the machine credential as per RFC3530bis and RFC5661 Security
6726 * Considerations sections. Otherwise, just use the user cred with the
6727 * filesystem's rpc_client.
5ec16a85 6728 */
a5250def 6729static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6730{
6731 int status;
6732 struct nfs4_secinfo_arg args = {
6733 .dir_fh = NFS_FH(dir),
6734 .name = name,
6735 };
6736 struct nfs4_secinfo_res res = {
6737 .flavors = flavors,
6738 };
6739 struct rpc_message msg = {
6740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6741 .rpc_argp = &args,
6742 .rpc_resp = &res,
6743 };
a5250def 6744 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6745 struct rpc_cred *cred = NULL;
a5250def
WAA		 6746
6747 if (use_integrity) {
6748 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6749 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6750 msg.rpc_cred = cred;
a5250def 6751 }
5a5ea0d4
BS		 6752
6753 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6754
6755 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6756 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6757
a5250def
WAA		 6758 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6759 &res.seq_res, 0);
5a5ea0d4 6760 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6761
7cb852df
WAA		 6762 if (cred)
6763 put_rpccred(cred);
a5250def 6764
5a5ea0d4
BS		 6765 return status;
6766}
6767
72de53ec
BS		 6768int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6769 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6770{
6771 struct nfs4_exception exception = { };
6772 int err;
6773 do {
a5250def
WAA		 6774 err = -NFS4ERR_WRONGSEC;
6775
6776 /* try to use integrity protection with machine cred */
6777 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6778 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6779
6780 /*
6781 * if unable to use integrity protection, or SECINFO with
6782 * integrity protection returns NFS4ERR_WRONGSEC (which is
6783 * disallowed by spec, but exists in deployed servers) use
6784 * the current filesystem's rpc_client and the user cred.
6785 */
6786 if (err == -NFS4ERR_WRONGSEC)
6787 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6788
078ea3df
TM		 6789 trace_nfs4_secinfo(dir, name, err);
6790 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6791 &exception);
6792 } while (exception.retry);
6793 return err;
6794}
6795
557134a3 6796#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6797/*
6798 * Check the exchange flags returned by the server for invalid flags, having
6799 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6800 * DS flags set.
6801 */
6802static int nfs4_check_cl_exchange_flags(u32 flags)
6803{
6804 if (flags & ~EXCHGID4_FLAG_MASK_R)
6805 goto out_inval;
6806 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6807 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6808 goto out_inval;
6809 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6810 goto out_inval;
6811 return NFS_OK;
6812out_inval:
6813 return -NFS4ERR_INVAL;
6814}
6815
78fe0f41 6816static bool
79d4e1f0
CL		 6817nfs41_same_server_scope(struct nfs41_server_scope *a,
6818 struct nfs41_server_scope *b)
78fe0f41
WAA		 6819{
6820 if (a->server_scope_sz == b->server_scope_sz &&
6821 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6822 return true;
6823
6824 return false;
6825}
6826
7c44f1ae
WAA		 6827/*
6828 * nfs4_proc_bind_conn_to_session()
6829 *
6830 * The 4.1 client currently uses the same TCP connection for the
6831 * fore and backchannel.
6832 */
2cf047c9 6833int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6834{
6835 int status;
71a097c6
TM		 6836 struct nfs41_bind_conn_to_session_args args = {
6837 .client = clp,
6838 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6839 };
7c44f1ae
WAA		 6840 struct nfs41_bind_conn_to_session_res res;
6841 struct rpc_message msg = {
6842 .rpc_proc =
6843 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6844 .rpc_argp = &args,
7c44f1ae 6845 .rpc_resp = &res,
2cf047c9 6846 .rpc_cred = cred,
7c44f1ae
WAA		 6847 };
6848
6849 dprintk("--> %s\n", __func__);
7c44f1ae 6850
71a097c6
TM		 6851 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6852 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6853 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6854
6855 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6856 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6857 if (status == 0) {
71a097c6 6858 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6859 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6860 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6861 status = -EIO;
71a097c6 6862 goto out;
7c44f1ae 6863 }
71a097c6 6864 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6865 dprintk("NFS: %s: Unexpected direction from server\n",
6866 __func__);
6867 status = -EIO;
71a097c6 6868 goto out;
7c44f1ae 6869 }
71a097c6 6870 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6871 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6872 __func__);
6873 status = -EIO;
71a097c6 6874 goto out;
7c44f1ae
WAA		 6875 }
6876 }
7c44f1ae
WAA		 6877out:
6878 dprintk("<-- %s status= %d\n", __func__, status);
6879 return status;
6880}
6881
99fe60d0 6882/*
fa940720
WAA		 6883 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6884 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6885 */
6886static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6887 .how = SP4_MACH_CRED,
6888 .enforce.u.words = {
6889 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6890 1 << (OP_EXCHANGE_ID - 32) |
6891 1 << (OP_CREATE_SESSION - 32) |
6892 1 << (OP_DESTROY_SESSION - 32) |
6893 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6894 },
6895 .allow.u.words = {
6896 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6897 1 << (OP_LOCKU) |
6898 1 << (OP_COMMIT),
8b5bee2e 6899 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6900 1 << (OP_SECINFO_NO_NAME - 32) |
6901 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6902 1 << (OP_FREE_STATEID - 32) |
6903 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6904 }
6905};
6906
6907/*
6908 * Select the state protection mode for client `clp' given the server results
6909 * from exchange_id in `sp'.
99fe60d0 6910 *
2031cd1a
WAA		 6911 * Returns 0 on success, negative errno otherwise.
6912 */
6913static int nfs4_sp4_select_mode(struct nfs_client *clp,
6914 struct nfs41_state_protection *sp)
6915{
6916 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6917 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6918 1 << (OP_EXCHANGE_ID - 32) |
6919 1 << (OP_CREATE_SESSION - 32) |
6920 1 << (OP_DESTROY_SESSION - 32) |
6921 1 << (OP_DESTROY_CLIENTID - 32)
6922 };
6923 unsigned int i;
6924
6925 if (sp->how == SP4_MACH_CRED) {
6926 /* Print state protect result */
6927 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6928 for (i = 0; i <= LAST_NFS4_OP; i++) {
6929 if (test_bit(i, sp->enforce.u.longs))
6930 dfprintk(MOUNT, " enforce op %d\n", i);
6931 if (test_bit(i, sp->allow.u.longs))
6932 dfprintk(MOUNT, " allow op %d\n", i);
6933 }
6934
6935 /* make sure nothing is on enforce list that isn't supported */
6936 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6937 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6938 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6939 return -EINVAL;
6940 }
6941 }
6942
6943 /*
6944 * Minimal mode - state operations are allowed to use machine
6945 * credential. Note this already happens by default, so the
6946 * client doesn't have to do anything more than the negotiation.
6947 *
6948 * NOTE: we don't care if EXCHANGE_ID is in the list -
6949 * we're already using the machine cred for exchange_id
6950 * and will never use a different cred.
6951 */
6952 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6953 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6954 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6955 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6956 dfprintk(MOUNT, "sp4_mach_cred:\n");
6957 dfprintk(MOUNT, " minimal mode enabled\n");
6958 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6959 } else {
6960 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6961 return -EINVAL;
6962 }
fa940720
WAA		 6963
6964 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6965 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6966 dfprintk(MOUNT, " cleanup mode enabled\n");
6967 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6968 }
8b5bee2e
WAA		 6969
6970 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6971 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6972 dfprintk(MOUNT, " secinfo mode enabled\n");
6973 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6974 }
3787d506
WAA		 6975
6976 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6977 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6978 dfprintk(MOUNT, " stateid mode enabled\n");
6979 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6980 }
8c21c62c
WAA		 6981
6982 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6983 dfprintk(MOUNT, " write mode enabled\n");
6984 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6985 }
6986
6987 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6988 dfprintk(MOUNT, " commit mode enabled\n");
6989 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6990 }
2031cd1a
WAA		 6991 }
6992
6993 return 0;
6994}
6995
6996/*
6997 * _nfs4_proc_exchange_id()
6bbb4ae8 6998 *
2031cd1a 6999 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7000 */
2031cd1a
WAA		 7001static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7002 u32 sp4_how)
99fe60d0
BH		 7003{
7004 nfs4_verifier verifier;
7005 struct nfs41_exchange_id_args args = {
cd93710e 7006 .verifier = &verifier,
99fe60d0 7007 .client = clp,
cd3fadec 7008#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7009 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7010 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7011 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7012#else
7013 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7014 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7015#endif
99fe60d0
BH		 7016 };
7017 struct nfs41_exchange_id_res res = {
32b01310 7018 0
99fe60d0
BH		 7019 };
7020 int status;
7021 struct rpc_message msg = {
7022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7023 .rpc_argp = &args,
7024 .rpc_resp = &res,
7025 .rpc_cred = cred,
7026 };
99fe60d0 7027
f092075d 7028 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7029
7030 status = nfs4_init_uniform_client_string(clp);
7031 if (status)
3a6bb738 7032 goto out;
3a6bb738
JL		 7033
7034 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7035 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7036 clp->cl_owner_id);
99fe60d0 7037
acdeb69d 7038 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7039 GFP_NOFS);
acdeb69d 7040 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7041 status = -ENOMEM;
7042 goto out;
7043 }
78fe0f41 7044
79d4e1f0 7045 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7046 GFP_NOFS);
177313f1 7047 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7048 status = -ENOMEM;
acdeb69d 7049 goto out_server_owner;
abe9a6d5 7050 }
78fe0f41 7051
bbafffd2 7052 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7053 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7054 status = -ENOMEM;
7055 goto out_server_scope;
7056 }
7057
2031cd1a
WAA		 7058 switch (sp4_how) {
7059 case SP4_NONE:
7060 args.state_protect.how = SP4_NONE;
7061 break;
7062
7063 case SP4_MACH_CRED:
7064 args.state_protect = nfs4_sp4_mach_cred_request;
7065 break;
7066
7067 default:
7068 /* unsupported! */
7069 WARN_ON_ONCE(1);
7070 status = -EINVAL;
6b55970b 7071 goto out_impl_id;
2031cd1a
WAA		 7072 }
7073
1bd714f2 7074 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7075 trace_nfs4_exchange_id(clp, status);
177313f1 7076 if (status == 0)
32b01310 7077 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7078
2031cd1a
WAA		 7079 if (status == 0)
7080 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7081
acdeb69d 7082 if (status == 0) {
32b01310 7083 clp->cl_clientid = res.clientid;
e11259f9
TM		 7084 clp->cl_exchange_flags = res.flags;
7085 /* Client ID is not confirmed */
7086 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7087 clear_bit(NFS4_SESSION_ESTABLISHED,
7088 &clp->cl_session->session_state);
32b01310 7089 clp->cl_seqid = res.seqid;
e11259f9 7090 }
32b01310 7091
acdeb69d
CL		 7092 kfree(clp->cl_serverowner);
7093 clp->cl_serverowner = res.server_owner;
7094 res.server_owner = NULL;
78fe0f41 7095
7d2ed9ac 7096 /* use the most recent implementation id */
59155546
CL		 7097 kfree(clp->cl_implid);
7098 clp->cl_implid = res.impl_id;
6b55970b 7099 res.impl_id = NULL;
7d2ed9ac 7100
177313f1 7101 if (clp->cl_serverscope != NULL &&
79d4e1f0 7102 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7103 res.server_scope)) {
7104 dprintk("%s: server_scope mismatch detected\n",
7105 __func__);
7106 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7107 kfree(clp->cl_serverscope);
7108 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7109 }
7110
177313f1 7111 if (clp->cl_serverscope == NULL) {
79d4e1f0 7112 clp->cl_serverscope = res.server_scope;
6b55970b 7113 res.server_scope = NULL;
abe9a6d5 7114 }
6b55970b 7115 }
7d2ed9ac 7116
6b55970b
KM		 7117out_impl_id:
7118 kfree(res.impl_id);
7d2ed9ac 7119out_server_scope:
abe9a6d5 7120 kfree(res.server_scope);
6b55970b
KM		 7121out_server_owner:
7122 kfree(res.server_owner);
abe9a6d5 7123out:
177313f1 7124 if (clp->cl_implid != NULL)
6bbb4ae8 7125 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7126 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7127 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7128 clp->cl_implid->date.seconds,
7129 clp->cl_implid->date.nseconds);
6bbb4ae8 7130 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7131 return status;
7132}
7133
2031cd1a
WAA		 7134/*
7135 * nfs4_proc_exchange_id()
7136 *
7137 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7138 *
7139 * Since the clientid has expired, all compounds using sessions
7140 * associated with the stale clientid will be returning
7141 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7142 * be in some phase of session reset.
7143 *
7144 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7145 */
7146int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7147{
7148 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7149 int status;
7150
7151 /* try SP4_MACH_CRED if krb5i/p */
7152 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7153 authflavor == RPC_AUTH_GSS_KRB5P) {
7154 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7155 if (!status)
7156 return 0;
7157 }
7158
7159 /* try SP4_NONE */
7160 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7161}
7162
66245539
TM		 7163static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7164 struct rpc_cred *cred)
7165{
7166 struct rpc_message msg = {
7167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7168 .rpc_argp = clp,
7169 .rpc_cred = cred,
7170 };
7171 int status;
7172
7173 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7174 trace_nfs4_destroy_clientid(clp, status);
66245539 7175 if (status)
02c67525 7176 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7177 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7178 return status;
7179}
7180
7181static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7182 struct rpc_cred *cred)
7183{
7184 unsigned int loop;
7185 int ret;
7186
7187 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7188 ret = _nfs4_proc_destroy_clientid(clp, cred);
7189 switch (ret) {
7190 case -NFS4ERR_DELAY:
7191 case -NFS4ERR_CLIENTID_BUSY:
7192 ssleep(1);
7193 break;
7194 default:
7195 return ret;
7196 }
7197 }
7198 return 0;
7199}
7200
7201int nfs4_destroy_clientid(struct nfs_client *clp)
7202{
7203 struct rpc_cred *cred;
7204 int ret = 0;
7205
7206 if (clp->cl_mvops->minor_version < 1)
7207 goto out;
7208 if (clp->cl_exchange_flags == 0)
7209 goto out;
05f4c350
CL		 7210 if (clp->cl_preserve_clid)
7211 goto out;
73d8bde5 7212 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7213 ret = nfs4_proc_destroy_clientid(clp, cred);
7214 if (cred)
7215 put_rpccred(cred);
7216 switch (ret) {
7217 case 0:
7218 case -NFS4ERR_STALE_CLIENTID:
7219 clp->cl_exchange_flags = 0;
7220 }
7221out:
7222 return ret;
7223}
7224
2050f0cc
AA		 7225struct nfs4_get_lease_time_data {
7226 struct nfs4_get_lease_time_args *args;
7227 struct nfs4_get_lease_time_res *res;
7228 struct nfs_client *clp;
7229};
7230
7231static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7232 void *calldata)
7233{
2050f0cc
AA		 7234 struct nfs4_get_lease_time_data *data =
7235 (struct nfs4_get_lease_time_data *)calldata;
7236
7237 dprintk("--> %s\n", __func__);
7238 /* just setup sequence, do not trigger session recovery
7239 since we're invoked within one */
d9afbd1b
TM		 7240 nfs41_setup_sequence(data->clp->cl_session,
7241 &data->args->la_seq_args,
7242 &data->res->lr_seq_res,
7243 task);
2050f0cc
AA		 7244 dprintk("<-- %s\n", __func__);
7245}
7246
7247/*
7248 * Called from nfs4_state_manager thread for session setup, so don't recover
7249 * from sequence operation or clientid errors.
7250 */
7251static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7252{
7253 struct nfs4_get_lease_time_data *data =
7254 (struct nfs4_get_lease_time_data *)calldata;
7255
7256 dprintk("--> %s\n", __func__);
14516c3a
TM		 7257 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7258 return;
2050f0cc
AA		 7259 switch (task->tk_status) {
7260 case -NFS4ERR_DELAY:
7261 case -NFS4ERR_GRACE:
7262 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7263 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7264 task->tk_status = 0;
a8a4ae3a
AA		 7265 /* fall through */
7266 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7267 rpc_restart_call_prepare(task);
2050f0cc
AA		 7268 return;
7269 }
2050f0cc
AA		 7270 dprintk("<-- %s\n", __func__);
7271}
7272
17280175 7273static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7274 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7275 .rpc_call_done = nfs4_get_lease_time_done,
7276};
7277
7278int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7279{
7280 struct rpc_task *task;
7281 struct nfs4_get_lease_time_args args;
7282 struct nfs4_get_lease_time_res res = {
7283 .lr_fsinfo = fsinfo,
7284 };
7285 struct nfs4_get_lease_time_data data = {
7286 .args = &args,
7287 .res = &res,
7288 .clp = clp,
7289 };
7290 struct rpc_message msg = {
7291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7292 .rpc_argp = &args,
7293 .rpc_resp = &res,
7294 };
7295 struct rpc_task_setup task_setup = {
7296 .rpc_client = clp->cl_rpcclient,
7297 .rpc_message = &msg,
7298 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7299 .callback_data = &data,
7300 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7301 };
7302 int status;
7303
a9c92d6b 7304 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7305 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7306 dprintk("--> %s\n", __func__);
7307 task = rpc_run_task(&task_setup);
7308
7309 if (IS_ERR(task))
7310 status = PTR_ERR(task);
7311 else {
7312 status = task->tk_status;
7313 rpc_put_task(task);
7314 }
7315 dprintk("<-- %s return %d\n", __func__, status);
7316
7317 return status;
7318}
7319
fc931582
AA		 7320/*
7321 * Initialize the values to be used by the client in CREATE_SESSION
7322 * If nfs4_init_session set the fore channel request and response sizes,
7323 * use them.
7324 *
7325 * Set the back channel max_resp_sz_cached to zero to force the client to
7326 * always set csa_cachethis to FALSE because the current implementation
7327 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7328 */
7329static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7330{
18aad3d5
AA		 7331 unsigned int max_rqst_sz, max_resp_sz;
7332
7333 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7334 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7335
fc931582 7336 /* Fore channel attributes */
18aad3d5
AA		 7337 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7338 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7339 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7340 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7341
7342 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7343 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7344 __func__,
7345 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7346 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7347
7348 /* Back channel attributes */
fc931582
AA		 7349 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7350 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7351 args->bc_attrs.max_resp_sz_cached = 0;
7352 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7353 args->bc_attrs.max_reqs = 1;
7354
7355 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7356 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7357 __func__,
7358 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7359 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7360 args->bc_attrs.max_reqs);
7361}
7362
79969dd1
TM		 7363static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7364 struct nfs41_create_session_res *res)
8d35301d 7365{
43c2e885 7366 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7367 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7368
43c2e885
BF		 7369 if (rcvd->max_resp_sz > sent->max_resp_sz)
7370 return -EINVAL;
7371 /*
7372 * Our requested max_ops is the minimum we need; we're not
7373 * prepared to break up compounds into smaller pieces than that.
7374 * So, no point even trying to continue if the server won't
7375 * cooperate:
7376 */
7377 if (rcvd->max_ops < sent->max_ops)
7378 return -EINVAL;
7379 if (rcvd->max_reqs == 0)
7380 return -EINVAL;
b4b9a0c1
VG		 7381 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7382 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7383 return 0;
8d35301d
AA		 7384}
7385
79969dd1
TM		 7386static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7387 struct nfs41_create_session_res *res)
43c2e885
BF		 7388{
7389 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7390 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7391
b1c0df5f
TM		 7392 if (!(res->flags & SESSION4_BACK_CHAN))
7393 goto out;
43c2e885
BF		 7394 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7395 return -EINVAL;
7396 if (rcvd->max_resp_sz < sent->max_resp_sz)
7397 return -EINVAL;
7398 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7399 return -EINVAL;
7400 /* These would render the backchannel useless: */
b4b9a0c1 7401 if (rcvd->max_ops != sent->max_ops)
43c2e885 7402 return -EINVAL;
b4b9a0c1 7403 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7404 return -EINVAL;
b1c0df5f 7405out:
43c2e885
BF		 7406 return 0;
7407}
8d35301d 7408
8d35301d 7409static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7410 struct nfs41_create_session_res *res)
8d35301d 7411{
43c2e885 7412 int ret;
8d35301d 7413
79969dd1 7414 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7415 if (ret)
7416 return ret;
79969dd1
TM		 7417 return nfs4_verify_back_channel_attrs(args, res);
7418}
7419
7420static void nfs4_update_session(struct nfs4_session *session,
7421 struct nfs41_create_session_res *res)
7422{
7423 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7424 /* Mark client id and session as being confirmed */
7425 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7426 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7427 session->flags = res->flags;
7428 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7429 if (res->flags & SESSION4_BACK_CHAN)
7430 memcpy(&session->bc_attrs, &res->bc_attrs,
7431 sizeof(session->bc_attrs));
8d35301d
AA		 7432}
7433
848f5bda
TM		 7434static int _nfs4_proc_create_session(struct nfs_client *clp,
7435 struct rpc_cred *cred)
fc931582
AA		 7436{
7437 struct nfs4_session *session = clp->cl_session;
7438 struct nfs41_create_session_args args = {
7439 .client = clp,
79969dd1
TM		 7440 .clientid = clp->cl_clientid,
7441 .seqid = clp->cl_seqid,
fc931582
AA		 7442 .cb_program = NFS4_CALLBACK,
7443 };
79969dd1
TM		 7444 struct nfs41_create_session_res res;
7445
fc931582
AA		 7446 struct rpc_message msg = {
7447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7448 .rpc_argp = &args,
7449 .rpc_resp = &res,
848f5bda 7450 .rpc_cred = cred,
fc931582
AA		 7451 };
7452 int status;
7453
7454 nfs4_init_channel_attrs(&args);
0f91421e 7455 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7456
1bd714f2 7457 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7458 trace_nfs4_create_session(clp, status);
fc931582 7459
43095d39 7460 if (!status) {
8d35301d 7461 /* Verify the session's negotiated channel_attrs values */
79969dd1 7462 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7463 /* Increment the clientid slot sequence id */
79969dd1
TM		 7464 if (clp->cl_seqid == res.seqid)
7465 clp->cl_seqid++;
7466 if (status)
7467 goto out;
7468 nfs4_update_session(session, &res);
fc931582 7469 }
79969dd1 7470out:
fc931582
AA		 7471 return status;
7472}
7473
7474/*
7475 * Issues a CREATE_SESSION operation to the server.
7476 * It is the responsibility of the caller to verify the session is
7477 * expired before calling this routine.
7478 */
848f5bda 7479int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7480{
7481 int status;
7482 unsigned *ptr;
fc931582
AA		 7483 struct nfs4_session *session = clp->cl_session;
7484
7485 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7486
848f5bda 7487 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7488 if (status)
7489 goto out;
7490
aacd5537
AA		 7491 /* Init or reset the session slot tables */
7492 status = nfs4_setup_session_slot_tables(session);
7493 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7494 if (status)
7495 goto out;
7496
7497 ptr = (unsigned *)&session->sess_id.data[0];
7498 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7499 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7500out:
7501 dprintk("<-- %s\n", __func__);
7502 return status;
7503}
7504
0f3e66c6
AA		 7505/*
7506 * Issue the over-the-wire RPC DESTROY_SESSION.
7507 * The caller must serialize access to this routine.
7508 */
848f5bda
TM		 7509int nfs4_proc_destroy_session(struct nfs4_session *session,
7510 struct rpc_cred *cred)
0f3e66c6 7511{
848f5bda
TM		 7512 struct rpc_message msg = {
7513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7514 .rpc_argp = session,
7515 .rpc_cred = cred,
7516 };
0f3e66c6 7517 int status = 0;
0f3e66c6
AA		 7518
7519 dprintk("--> nfs4_proc_destroy_session\n");
7520
7521 /* session is still being setup */
e11259f9
TM		 7522 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7523 return 0;
0f3e66c6 7524
1bd714f2 7525 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7526 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7527
7528 if (status)
08106ac7 7529 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7530 "Session has been destroyed regardless...\n", status);
7531
7532 dprintk("<-- nfs4_proc_destroy_session\n");
7533 return status;
7534}
7535
fc01cea9
AA		 7536/*
7537 * Renew the cl_session lease.
7538 */
d5f8d3fe
TM		 7539struct nfs4_sequence_data {
7540 struct nfs_client *clp;
7541 struct nfs4_sequence_args args;
7542 struct nfs4_sequence_res res;
7543};
7544
dc96aef9
AB		 7545static void nfs41_sequence_release(void *data)
7546{
d5f8d3fe
TM		 7547 struct nfs4_sequence_data *calldata = data;
7548 struct nfs_client *clp = calldata->clp;
dc96aef9 7549
7135840f
AB		 7550 if (atomic_read(&clp->cl_count) > 1)
7551 nfs4_schedule_state_renewal(clp);
7552 nfs_put_client(clp);
d5f8d3fe 7553 kfree(calldata);
dc96aef9
AB		 7554}
7555
aa5190d0
TM		 7556static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7557{
7558 switch(task->tk_status) {
7559 case -NFS4ERR_DELAY:
aa5190d0
TM		 7560 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7561 return -EAGAIN;
7562 default:
0400a6b0 7563 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7564 }
7565 return 0;
7566}
7567
dc96aef9 7568static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7569{
d5f8d3fe
TM		 7570 struct nfs4_sequence_data *calldata = data;
7571 struct nfs_client *clp = calldata->clp;
fc01cea9 7572
14516c3a
TM		 7573 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7574 return;
fc01cea9 7575
c6d01c6f 7576 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7577 if (task->tk_status < 0) {
7578 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7579 if (atomic_read(&clp->cl_count) == 1)
7580 goto out;
fc01cea9 7581
aa5190d0
TM		 7582 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7583 rpc_restart_call_prepare(task);
fc01cea9
AA		 7584 return;
7585 }
7586 }
fc01cea9 7587 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7588out:
fc01cea9
AA		 7589 dprintk("<-- %s\n", __func__);
7590}
7591
7592static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7593{
d5f8d3fe
TM		 7594 struct nfs4_sequence_data *calldata = data;
7595 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7596 struct nfs4_sequence_args *args;
7597 struct nfs4_sequence_res *res;
7598
fc01cea9
AA		 7599 args = task->tk_msg.rpc_argp;
7600 res = task->tk_msg.rpc_resp;
7601
d9afbd1b 7602 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7603}
7604
7605static const struct rpc_call_ops nfs41_sequence_ops = {
7606 .rpc_call_done = nfs41_sequence_call_done,
7607 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7608 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7609};
7610
8fe72bac
TM		 7611static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7612 struct rpc_cred *cred,
7613 bool is_privileged)
fc01cea9 7614{
d5f8d3fe 7615 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7616 struct rpc_message msg = {
7617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7618 .rpc_cred = cred,
7619 };
71ac6da9
TM		 7620 struct rpc_task_setup task_setup_data = {
7621 .rpc_client = clp->cl_rpcclient,
7622 .rpc_message = &msg,
8fe72bac 7623 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7624 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7625 };
fc01cea9 7626
7135840f 7627 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7628 return ERR_PTR(-EIO);
dfb4f309 7629 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7630 if (calldata == NULL) {
7135840f 7631 nfs_put_client(clp);
71ac6da9 7632 return ERR_PTR(-ENOMEM);
fc01cea9 7633 }
a9c92d6b 7634 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7635 if (is_privileged)
7636 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7637 msg.rpc_argp = &calldata->args;
7638 msg.rpc_resp = &calldata->res;
7639 calldata->clp = clp;
71ac6da9 7640 task_setup_data.callback_data = calldata;
fc01cea9 7641
71ac6da9
TM		 7642 return rpc_run_task(&task_setup_data);
7643}
7644
2f60ea6b 7645static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7646{
7647 struct rpc_task *task;
7648 int ret = 0;
7649
2f60ea6b 7650 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7651 return -EAGAIN;
8fe72bac 7652 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7653 if (IS_ERR(task))
7654 ret = PTR_ERR(task);
7655 else
bf294b41 7656 rpc_put_task_async(task);
71ac6da9
TM		 7657 dprintk("<-- %s status=%d\n", __func__, ret);
7658 return ret;
7659}
7660
7661static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7662{
7663 struct rpc_task *task;
7664 int ret;
7665
8fe72bac 7666 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7667 if (IS_ERR(task)) {
7668 ret = PTR_ERR(task);
7669 goto out;
7670 }
7671 ret = rpc_wait_for_completion_task(task);
be824167 7672 if (!ret)
71ac6da9
TM		 7673 ret = task->tk_status;
7674 rpc_put_task(task);
7675out:
7676 dprintk("<-- %s status=%d\n", __func__, ret);
7677 return ret;
fc01cea9
AA		 7678}
7679
fce5c838
RL		 7680struct nfs4_reclaim_complete_data {
7681 struct nfs_client *clp;
7682 struct nfs41_reclaim_complete_args arg;
7683 struct nfs41_reclaim_complete_res res;
7684};
7685
7686static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7687{
7688 struct nfs4_reclaim_complete_data *calldata = data;
7689
d9afbd1b
TM		 7690 nfs41_setup_sequence(calldata->clp->cl_session,
7691 &calldata->arg.seq_args,
7692 &calldata->res.seq_res,
7693 task);
fce5c838
RL		 7694}
7695
aa5190d0
TM		 7696static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7697{
7698 switch(task->tk_status) {
7699 case 0:
7700 case -NFS4ERR_COMPLETE_ALREADY:
7701 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7702 break;
7703 case -NFS4ERR_DELAY:
aa5190d0 7704 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7705 /* fall through */
7706 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7707 return -EAGAIN;
7708 default:
0400a6b0 7709 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7710 }
7711 return 0;
7712}
7713
fce5c838
RL		 7714static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7715{
7716 struct nfs4_reclaim_complete_data *calldata = data;
7717 struct nfs_client *clp = calldata->clp;
7718 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7719
7720 dprintk("--> %s\n", __func__);
14516c3a
TM		 7721 if (!nfs41_sequence_done(task, res))
7722 return;
fce5c838 7723
c6d01c6f 7724 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7725 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7726 rpc_restart_call_prepare(task);
7727 return;
7728 }
fce5c838
RL		 7729 dprintk("<-- %s\n", __func__);
7730}
7731
7732static void nfs4_free_reclaim_complete_data(void *data)
7733{
7734 struct nfs4_reclaim_complete_data *calldata = data;
7735
7736 kfree(calldata);
7737}
7738
7739static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7740 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7741 .rpc_call_done = nfs4_reclaim_complete_done,
7742 .rpc_release = nfs4_free_reclaim_complete_data,
7743};
7744
7745/*
7746 * Issue a global reclaim complete.
7747 */
965e9c23
TM		 7748static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7749 struct rpc_cred *cred)
fce5c838
RL		 7750{
7751 struct nfs4_reclaim_complete_data *calldata;
7752 struct rpc_task *task;
7753 struct rpc_message msg = {
7754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7755 .rpc_cred = cred,
fce5c838
RL		 7756 };
7757 struct rpc_task_setup task_setup_data = {
7758 .rpc_client = clp->cl_rpcclient,
7759 .rpc_message = &msg,
7760 .callback_ops = &nfs4_reclaim_complete_call_ops,
7761 .flags = RPC_TASK_ASYNC,
7762 };
7763 int status = -ENOMEM;
7764
7765 dprintk("--> %s\n", __func__);
8535b2be 7766 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7767 if (calldata == NULL)
7768 goto out;
7769 calldata->clp = clp;
7770 calldata->arg.one_fs = 0;
fce5c838 7771
a9c92d6b 7772 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7773 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7774 msg.rpc_argp = &calldata->arg;
7775 msg.rpc_resp = &calldata->res;
7776 task_setup_data.callback_data = calldata;
7777 task = rpc_run_task(&task_setup_data);
acf82b85 7778 if (IS_ERR(task)) {
fce5c838 7779 status = PTR_ERR(task);
acf82b85
DC		 7780 goto out;
7781 }
c34c32ea
AA		 7782 status = nfs4_wait_for_completion_rpc_task(task);
7783 if (status == 0)
7784 status = task->tk_status;
fce5c838 7785 rpc_put_task(task);
acf82b85 7786 return 0;
fce5c838
RL		 7787out:
7788 dprintk("<-- %s status=%d\n", __func__, status);
7789 return status;
7790}
b1f69b75
AA		 7791
7792static void
7793nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7794{
7795 struct nfs4_layoutget *lgp = calldata;
c31663d4 7796 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7797 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7798
7799 dprintk("--> %s\n", __func__);
c31663d4
FI		 7800 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7801 * right now covering the LAYOUTGET we are about to send.
7802 * However, that is not so catastrophic, and there seems
7803 * to be no way to prevent it completely.
7804 */
6ba7db34 7805 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7806 &lgp->res.seq_res, task))
b1f69b75 7807 return;
cf7d63f1
FI		 7808 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7809 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7810 &lgp->args.range,
cf7d63f1
FI		 7811 lgp->args.ctx->state)) {
7812 rpc_exit(task, NFS4_OK);
cf7d63f1 7813 }
b1f69b75
AA		 7814}
7815
7816static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7817{
7818 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7819 struct inode *inode = lgp->args.inode;
7820 struct nfs_server *server = NFS_SERVER(inode);
7821 struct pnfs_layout_hdr *lo;
7822 struct nfs4_state *state = NULL;
ed7e5423 7823 unsigned long timeo, now, giveup;
b1f69b75 7824
ed7e5423 7825 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7826
6ba7db34 7827 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7828 goto out;
b1f69b75
AA		 7829
7830 switch (task->tk_status) {
7831 case 0:
ee314c2a 7832 goto out;
21b874c8
TM		 7833 /*
7834 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7835 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7836 */
7837 case -NFS4ERR_BADLAYOUT:
7838 goto out_overflow;
ed7e5423
BH		 7839 /*
7840 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7841 * (or clients) writing to the same RAID stripe except when
7842 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7843 */
b1f69b75 7844 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7845 if (lgp->args.minlength == 0)
7846 goto out_overflow;
ed7e5423
BH		 7847 /*
7848 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7849 * existing layout before getting a new one).
7850 */
b1f69b75 7851 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7852 timeo = rpc_get_timeout(task->tk_client);
7853 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7854 now = jiffies;
7855 if (time_after(giveup, now)) {
7856 unsigned long delay;
7857
7858 /* Delay for:
7859 * - Not less then NFS4_POLL_RETRY_MIN.
7860 * - One last time a jiffie before we give up
7861 * - exponential backoff (time_now minus start_attempt)
7862 */
7863 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7864 min((giveup - now - 1),
7865 now - lgp->args.timestamp));
7866
7867 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7868 __func__, delay);
7869 rpc_delay(task, delay);
2259f960
TM		 7870 /* Do not call nfs4_async_handle_error() */
7871 goto out_restart;
ed7e5423 7872 }
ee314c2a
TM		 7873 break;
7874 case -NFS4ERR_EXPIRED:
7875 case -NFS4ERR_BAD_STATEID:
7876 spin_lock(&inode->i_lock);
2259f960
TM		 7877 if (nfs4_stateid_match(&lgp->args.stateid,
7878 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7879 spin_unlock(&inode->i_lock);
7880 /* If the open stateid was bad, then recover it. */
7881 state = lgp->args.ctx->state;
2259f960
TM		 7882 break;
7883 }
7884 lo = NFS_I(inode)->layout;
7885 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7886 &lo->plh_stateid)) {
ee314c2a
TM		 7887 LIST_HEAD(head);
7888
defb8460
CH		 7889 /*
7890 * Mark the bad layout state as invalid, then retry
7891 * with the current stateid.
7892 */
8714d46d 7893 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7894 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7895 spin_unlock(&inode->i_lock);
ee314c2a 7896 pnfs_free_lseg_list(&head);
2259f960
TM		 7897 } else
7898 spin_unlock(&inode->i_lock);
7899 goto out_restart;
b1f69b75 7900 }
8478eaa1 7901 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
2259f960 7902 goto out_restart;
ee314c2a 7903out:
b1f69b75 7904 dprintk("<-- %s\n", __func__);
21b874c8 7905 return;
2259f960
TM		 7906out_restart:
7907 task->tk_status = 0;
7908 rpc_restart_call_prepare(task);
7909 return;
21b874c8
TM		 7910out_overflow:
7911 task->tk_status = -EOVERFLOW;
7912 goto out;
b1f69b75
AA		 7913}
7914
8554116e
IK		 7915static size_t max_response_pages(struct nfs_server *server)
7916{
7917 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7918 return nfs_page_array_len(0, max_resp_sz);
7919}
7920
7921static void nfs4_free_pages(struct page **pages, size_t size)
7922{
7923 int i;
7924
7925 if (!pages)
7926 return;
7927
7928 for (i = 0; i < size; i++) {
7929 if (!pages[i])
7930 break;
7931 __free_page(pages[i]);
7932 }
7933 kfree(pages);
7934}
7935
7936static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7937{
7938 struct page **pages;
7939 int i;
7940
7941 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7942 if (!pages) {
7943 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7944 return NULL;
7945 }
7946
7947 for (i = 0; i < size; i++) {
7948 pages[i] = alloc_page(gfp_flags);
7949 if (!pages[i]) {
7950 dprintk("%s: failed to allocate page\n", __func__);
7951 nfs4_free_pages(pages, size);
7952 return NULL;
7953 }
7954 }
7955
7956 return pages;
7957}
7958
b1f69b75
AA		 7959static void nfs4_layoutget_release(void *calldata)
7960{
7961 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7962 struct inode *inode = lgp->args.inode;
7963 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7964 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7965
7966 dprintk("--> %s\n", __func__);
8554116e 7967 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7968 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7969 put_nfs_open_context(lgp->args.ctx);
7970 kfree(calldata);
7971 dprintk("<-- %s\n", __func__);
7972}
7973
7974static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7975 .rpc_call_prepare = nfs4_layoutget_prepare,
7976 .rpc_call_done = nfs4_layoutget_done,
7977 .rpc_release = nfs4_layoutget_release,
7978};
7979
a0b0a6e3
TM		 7980struct pnfs_layout_segment *
7981nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7982{
a47970ff
WAA		 7983 struct inode *inode = lgp->args.inode;
7984 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7985 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7986 struct rpc_task *task;
7987 struct rpc_message msg = {
7988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7989 .rpc_argp = &lgp->args,
7990 .rpc_resp = &lgp->res,
6ab59344 7991 .rpc_cred = lgp->cred,
b1f69b75
AA		 7992 };
7993 struct rpc_task_setup task_setup_data = {
7994 .rpc_client = server->client,
7995 .rpc_message = &msg,
7996 .callback_ops = &nfs4_layoutget_call_ops,
7997 .callback_data = lgp,
7998 .flags = RPC_TASK_ASYNC,
7999 };
a0b0a6e3 8000 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 8001 int status = 0;
8002
8003 dprintk("--> %s\n", __func__);
8004
4bd5a980
PT		 8005 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8006 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8007
8554116e
IK		 8008 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8009 if (!lgp->args.layout.pages) {
8010 nfs4_layoutget_release(lgp);
a0b0a6e3 8011 return ERR_PTR(-ENOMEM);
8554116e
IK		 8012 }
8013 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 8014 lgp->args.timestamp = jiffies;
8554116e 8015
35124a09 8016 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8017 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8018 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8019
b1f69b75
AA		 8020 task = rpc_run_task(&task_setup_data);
8021 if (IS_ERR(task))
a0b0a6e3 8022 return ERR_CAST(task);
b1f69b75 8023 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 8024 if (status == 0)
8025 status = task->tk_status;
1037e6ea
TM		 8026 trace_nfs4_layoutget(lgp->args.ctx,
8027 &lgp->args.range,
8028 &lgp->res.range,
8029 status);
085b7a45
WAA		 8030 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8031 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8032 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8033 rpc_put_task(task);
8034 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8035 if (status)
8036 return ERR_PTR(status);
8037 return lseg;
b1f69b75
AA		 8038}
8039
cbe82603
BH		 8040static void
8041nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8042{
8043 struct nfs4_layoutreturn *lrp = calldata;
8044
8045 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8046 nfs41_setup_sequence(lrp->clp->cl_session,
8047 &lrp->args.seq_args,
8048 &lrp->res.seq_res,
8049 task);
cbe82603
BH		 8050}
8051
8052static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8053{
8054 struct nfs4_layoutreturn *lrp = calldata;
8055 struct nfs_server *server;
8056
8057 dprintk("--> %s\n", __func__);
8058
6ba7db34 8059 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8060 return;
8061
8062 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8063 switch (task->tk_status) {
8064 default:
8065 task->tk_status = 0;
8066 case 0:
8067 break;
8068 case -NFS4ERR_DELAY:
8478eaa1 8069 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8070 break;
d00c5d43 8071 rpc_restart_call_prepare(task);
cbe82603
BH		 8072 return;
8073 }
cbe82603
BH		 8074 dprintk("<-- %s\n", __func__);
8075}
8076
8077static void nfs4_layoutreturn_release(void *calldata)
8078{
8079 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8080 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8081 LIST_HEAD(freeme);
cbe82603
BH		 8082
8083 dprintk("--> %s\n", __func__);
849b286f
TM		 8084 spin_lock(&lo->plh_inode->i_lock);
8085 if (lrp->res.lrs_present)
8086 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8087 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8088 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8089 lo->plh_block_lgets--;
8090 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8091 pnfs_free_lseg_list(&freeme);
70c3bd2b 8092 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8093 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8094 kfree(calldata);
8095 dprintk("<-- %s\n", __func__);
8096}
8097
8098static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8099 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8100 .rpc_call_done = nfs4_layoutreturn_done,
8101 .rpc_release = nfs4_layoutreturn_release,
8102};
8103
6c16605d 8104int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8105{
8106 struct rpc_task *task;
8107 struct rpc_message msg = {
8108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8109 .rpc_argp = &lrp->args,
8110 .rpc_resp = &lrp->res,
9556000d 8111 .rpc_cred = lrp->cred,
cbe82603
BH		 8112 };
8113 struct rpc_task_setup task_setup_data = {
1771c577 8114 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8115 .rpc_message = &msg,
8116 .callback_ops = &nfs4_layoutreturn_call_ops,
8117 .callback_data = lrp,
8118 };
6c16605d 8119 int status = 0;
cbe82603
BH		 8120
8121 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8122 if (!sync) {
8123 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8124 if (!lrp->inode) {
8125 nfs4_layoutreturn_release(lrp);
8126 return -EAGAIN;
8127 }
8128 task_setup_data.flags |= RPC_TASK_ASYNC;
8129 }
a9c92d6b 8130 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8131 task = rpc_run_task(&task_setup_data);
8132 if (IS_ERR(task))
8133 return PTR_ERR(task);
5a0ec8ac
TM		 8134 if (sync)
8135 status = task->tk_status;
1037e6ea 8136 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8137 dprintk("<-- %s status=%d\n", __func__, status);
8138 rpc_put_task(task);
8139 return status;
8140}
8141
b1f69b75 8142static int
cd5875fe
TM		 8143_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8144 struct pnfs_device *pdev,
8145 struct rpc_cred *cred)
b1f69b75
AA		 8146{
8147 struct nfs4_getdeviceinfo_args args = {
8148 .pdev = pdev,
4e590803
TM		 8149 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8150 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8151 };
8152 struct nfs4_getdeviceinfo_res res = {
8153 .pdev = pdev,
8154 };
8155 struct rpc_message msg = {
8156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8157 .rpc_argp = &args,
8158 .rpc_resp = &res,
cd5875fe 8159 .rpc_cred = cred,
b1f69b75
AA		 8160 };
8161 int status;
8162
8163 dprintk("--> %s\n", __func__);
7c513058 8164 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8165 if (res.notification & ~args.notify_types)
8166 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8167 if (res.notification != args.notify_types)
8168 pdev->nocache = 1;
4e590803 8169
b1f69b75
AA		 8170 dprintk("<-- %s status=%d\n", __func__, status);
8171
8172 return status;
8173}
8174
cd5875fe
TM		 8175int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8176 struct pnfs_device *pdev,
8177 struct rpc_cred *cred)
b1f69b75
AA		 8178{
8179 struct nfs4_exception exception = { };
8180 int err;
8181
8182 do {
8183 err = nfs4_handle_exception(server,
cd5875fe 8184 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8185 &exception);
8186 } while (exception.retry);
8187 return err;
8188}
8189EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8190
863a3c6c
AA		 8191static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8192{
8193 struct nfs4_layoutcommit_data *data = calldata;
8194 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8195 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8196
d9afbd1b
TM		 8197 nfs41_setup_sequence(session,
8198 &data->args.seq_args,
8199 &data->res.seq_res,
8200 task);
863a3c6c
AA		 8201}
8202
8203static void
8204nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8205{
8206 struct nfs4_layoutcommit_data *data = calldata;
8207 struct nfs_server *server = NFS_SERVER(data->args.inode);
8208
6ba7db34 8209 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8210 return;
8211
8212 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8213 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8214 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8215 case -NFS4ERR_BADLAYOUT: /* no layout */
8216 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8217 task->tk_status = 0;
e59d27e0 8218 case 0:
e59d27e0
TM		 8219 break;
8220 default:
8478eaa1 8221 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8222 rpc_restart_call_prepare(task);
8223 return;
8224 }
8225 }
863a3c6c
AA		 8226}
8227
8228static void nfs4_layoutcommit_release(void *calldata)
8229{
8230 struct nfs4_layoutcommit_data *data = calldata;
8231
db29c089 8232 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8233 nfs_post_op_update_inode_force_wcc(data->args.inode,
8234 data->res.fattr);
863a3c6c 8235 put_rpccred(data->cred);
472e2594 8236 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8237 kfree(data);
8238}
8239
8240static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8241 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8242 .rpc_call_done = nfs4_layoutcommit_done,
8243 .rpc_release = nfs4_layoutcommit_release,
8244};
8245
8246int
ef311537 8247nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8248{
8249 struct rpc_message msg = {
8250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8251 .rpc_argp = &data->args,
8252 .rpc_resp = &data->res,
8253 .rpc_cred = data->cred,
8254 };
8255 struct rpc_task_setup task_setup_data = {
8256 .task = &data->task,
8257 .rpc_client = NFS_CLIENT(data->args.inode),
8258 .rpc_message = &msg,
8259 .callback_ops = &nfs4_layoutcommit_ops,
8260 .callback_data = data,
863a3c6c
AA		 8261 };
8262 struct rpc_task *task;
8263 int status = 0;
8264
b4839ebe
KM		 8265 dprintk("NFS: initiating layoutcommit call. sync %d "
8266 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8267 data->args.lastbytewritten,
8268 data->args.inode->i_ino);
8269
472e2594
TM		 8270 if (!sync) {
8271 data->inode = nfs_igrab_and_active(data->args.inode);
8272 if (data->inode == NULL) {
8273 nfs4_layoutcommit_release(data);
8274 return -EAGAIN;
8275 }
8276 task_setup_data.flags = RPC_TASK_ASYNC;
8277 }
a9c92d6b 8278 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8279 task = rpc_run_task(&task_setup_data);
8280 if (IS_ERR(task))
8281 return PTR_ERR(task);
472e2594
TM		 8282 if (sync)
8283 status = task->tk_status;
1037e6ea 8284 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8285 dprintk("%s: status %d\n", __func__, status);
8286 rpc_put_task(task);
8287 return status;
8288}
fca78d6d 8289
97431204
AA		 8290/**
8291 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8292 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8293 */
fca78d6d
BS		 8294static int
8295_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8296 struct nfs_fsinfo *info,
8297 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8298{
8299 struct nfs41_secinfo_no_name_args args = {
8300 .style = SECINFO_STYLE_CURRENT_FH,
8301 };
8302 struct nfs4_secinfo_res res = {
8303 .flavors = flavors,
8304 };
8305 struct rpc_message msg = {
8306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8307 .rpc_argp = &args,
8308 .rpc_resp = &res,
8309 };
b1b3e136 8310 struct rpc_clnt *clnt = server->client;
7cb852df 8311 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8312 int status;
8313
8314 if (use_integrity) {
8315 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8316 cred = nfs4_get_clid_cred(server->nfs_client);
8317 msg.rpc_cred = cred;
b1b3e136
WAA		 8318 }
8319
8320 dprintk("--> %s\n", __func__);
8321 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8322 &res.seq_res, 0);
8323 dprintk("<-- %s status=%d\n", __func__, status);
8324
7cb852df
WAA		 8325 if (cred)
8326 put_rpccred(cred);
b1b3e136
WAA		 8327
8328 return status;
fca78d6d
BS		 8329}
8330
8331static int
8332nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8333 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8334{
8335 struct nfs4_exception exception = { };
8336 int err;
8337 do {
b1b3e136
WAA		 8338 /* first try using integrity protection */
8339 err = -NFS4ERR_WRONGSEC;
8340
8341 /* try to use integrity protection with machine cred */
8342 if (_nfs4_is_integrity_protected(server->nfs_client))
8343 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8344 flavors, true);
8345
8346 /*
8347 * if unable to use integrity protection, or SECINFO with
8348 * integrity protection returns NFS4ERR_WRONGSEC (which is
8349 * disallowed by spec, but exists in deployed servers) use
8350 * the current filesystem's rpc_client and the user cred.
8351 */
8352 if (err == -NFS4ERR_WRONGSEC)
8353 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8354 flavors, false);
8355
fca78d6d
BS		 8356 switch (err) {
8357 case 0:
8358 case -NFS4ERR_WRONGSEC:
78b19bae 8359 case -ENOTSUPP:
05e9cfb4 8360 goto out;
fca78d6d
BS		 8361 default:
8362 err = nfs4_handle_exception(server, err, &exception);
8363 }
8364 } while (exception.retry);
05e9cfb4 8365out:
fca78d6d
BS		 8366 return err;
8367}
8368
8369static int
8370nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8371 struct nfs_fsinfo *info)
8372{
8373 int err;
8374 struct page *page;
367156d9 8375 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8376 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8377 struct nfs4_secinfo4 *secinfo;
8378 int i;
fca78d6d
BS		 8379
8380 page = alloc_page(GFP_KERNEL);
8381 if (!page) {
8382 err = -ENOMEM;
8383 goto out;
8384 }
8385
8386 flavors = page_address(page);
8387 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8388
8389 /*
8390 * Fall back on "guess and check" method if
8391 * the server doesn't support SECINFO_NO_NAME
8392 */
78b19bae 8393 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8394 err = nfs4_find_root_sec(server, fhandle, info);
8395 goto out_freepage;
8396 }
8397 if (err)
8398 goto out_freepage;
8399
58a8cf12
WAA		 8400 for (i = 0; i < flavors->num_flavors; i++) {
8401 secinfo = &flavors->flavors[i];
8402
8403 switch (secinfo->flavor) {
8404 case RPC_AUTH_NULL:
8405 case RPC_AUTH_UNIX:
8406 case RPC_AUTH_GSS:
8407 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8408 &secinfo->flavor_info);
8409 break;
8410 default:
8411 flavor = RPC_AUTH_MAXFLAVOR;
8412 break;
8413 }
8414
4d4b69dd
WAA		 8415 if (!nfs_auth_info_match(&server->auth_info, flavor))
8416 flavor = RPC_AUTH_MAXFLAVOR;
8417
58a8cf12
WAA		 8418 if (flavor != RPC_AUTH_MAXFLAVOR) {
8419 err = nfs4_lookup_root_sec(server, fhandle,
8420 info, flavor);
8421 if (!err)
8422 break;
8423 }
8424 }
8425
8426 if (flavor == RPC_AUTH_MAXFLAVOR)
8427 err = -EPERM;
fca78d6d
BS		 8428
8429out_freepage:
8430 put_page(page);
8431 if (err == -EACCES)
8432 return -EPERM;
8433out:
8434 return err;
8435}
1cab0652 8436
ab7cb0df
TM		 8437static int _nfs41_test_stateid(struct nfs_server *server,
8438 nfs4_stateid *stateid,
8439 struct rpc_cred *cred)
7d974794
BS		 8440{
8441 int status;
8442 struct nfs41_test_stateid_args args = {
1cab0652 8443 .stateid = stateid,
7d974794
BS		 8444 };
8445 struct nfs41_test_stateid_res res;
8446 struct rpc_message msg = {
8447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8448 .rpc_argp = &args,
8449 .rpc_resp = &res,
ab7cb0df 8450 .rpc_cred = cred,
7d974794 8451 };
3787d506
WAA		 8452 struct rpc_clnt *rpc_client = server->client;
8453
8454 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8455 &rpc_client, &msg);
1cab0652 8456
38527b15 8457 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8458 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8459 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8460 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8461 &args.seq_args, &res.seq_res);
38527b15
CL		 8462 if (status != NFS_OK) {
8463 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8464 return status;
38527b15
CL		 8465 }
8466 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8467 return -res.status;
7d974794
BS		 8468}
8469
38527b15
CL		 8470/**
8471 * nfs41_test_stateid - perform a TEST_STATEID operation
8472 *
8473 * @server: server / transport on which to perform the operation
8474 * @stateid: state ID to test
ab7cb0df 8475 * @cred: credential
38527b15
CL		 8476 *
8477 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8478 * Otherwise a negative NFS4ERR value is returned if the operation
8479 * failed or the state ID is not currently valid.
8480 */
ab7cb0df
TM		 8481static int nfs41_test_stateid(struct nfs_server *server,
8482 nfs4_stateid *stateid,
8483 struct rpc_cred *cred)
7d974794
BS		 8484{
8485 struct nfs4_exception exception = { };
8486 int err;
8487 do {
ab7cb0df 8488 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8489 if (err != -NFS4ERR_DELAY)
8490 break;
8491 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8492 } while (exception.retry);
8493 return err;
8494}
9aeda35f 8495
7c1d5fae
TM		 8496struct nfs_free_stateid_data {
8497 struct nfs_server *server;
8498 struct nfs41_free_stateid_args args;
9aeda35f 8499 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8500};
8501
8502static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8503{
8504 struct nfs_free_stateid_data *data = calldata;
8505 nfs41_setup_sequence(nfs4_get_session(data->server),
8506 &data->args.seq_args,
8507 &data->res.seq_res,
8508 task);
8509}
8510
8511static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8512{
8513 struct nfs_free_stateid_data *data = calldata;
8514
8515 nfs41_sequence_done(task, &data->res.seq_res);
8516
8517 switch (task->tk_status) {
8518 case -NFS4ERR_DELAY:
8478eaa1 8519 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8520 rpc_restart_call_prepare(task);
8521 }
8522}
8523
8524static void nfs41_free_stateid_release(void *calldata)
8525{
8526 kfree(calldata);
8527}
8528
17f26b12 8529static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8530 .rpc_call_prepare = nfs41_free_stateid_prepare,
8531 .rpc_call_done = nfs41_free_stateid_done,
8532 .rpc_release = nfs41_free_stateid_release,
8533};
8534
8535static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8536 nfs4_stateid *stateid,
ab7cb0df 8537 struct rpc_cred *cred,
7c1d5fae
TM		 8538 bool privileged)
8539{
9aeda35f
BS		 8540 struct rpc_message msg = {
8541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8542 .rpc_cred = cred,
9aeda35f 8543 };
7c1d5fae
TM		 8544 struct rpc_task_setup task_setup = {
8545 .rpc_client = server->client,
8546 .rpc_message = &msg,
8547 .callback_ops = &nfs41_free_stateid_ops,
8548 .flags = RPC_TASK_ASYNC,
8549 };
8550 struct nfs_free_stateid_data *data;
9aeda35f 8551
3787d506
WAA		 8552 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8553 &task_setup.rpc_client, &msg);
8554
38527b15 8555 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8556 data = kmalloc(sizeof(*data), GFP_NOFS);
8557 if (!data)
8558 return ERR_PTR(-ENOMEM);
8559 data->server = server;
8560 nfs4_stateid_copy(&data->args.stateid, stateid);
8561
8562 task_setup.callback_data = data;
8563
8564 msg.rpc_argp = &data->args;
8565 msg.rpc_resp = &data->res;
a9c92d6b 8566 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8567 if (privileged)
8568 nfs4_set_sequence_privileged(&data->args.seq_args);
8569
8570 return rpc_run_task(&task_setup);
9aeda35f
BS		 8571}
8572
38527b15
CL		 8573/**
8574 * nfs41_free_stateid - perform a FREE_STATEID operation
8575 *
8576 * @server: server / transport on which to perform the operation
8577 * @stateid: state ID to release
ab7cb0df 8578 * @cred: credential
38527b15
CL		 8579 *
8580 * Returns NFS_OK if the server freed "stateid". Otherwise a
8581 * negative NFS4ERR value is returned.
8582 */
ab7cb0df
TM		 8583static int nfs41_free_stateid(struct nfs_server *server,
8584 nfs4_stateid *stateid,
8585 struct rpc_cred *cred)
9aeda35f 8586{
7c1d5fae
TM		 8587 struct rpc_task *task;
8588 int ret;
8589
ab7cb0df 8590 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8591 if (IS_ERR(task))
8592 return PTR_ERR(task);
8593 ret = rpc_wait_for_completion_task(task);
8594 if (!ret)
8595 ret = task->tk_status;
8596 rpc_put_task(task);
8597 return ret;
9aeda35f 8598}
36281caa 8599
f1cdae87
JL		 8600static void
8601nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8602{
8603 struct rpc_task *task;
ab7cb0df 8604 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8605
ab7cb0df 8606 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8607 nfs4_free_lock_state(server, lsp);
8608 if (IS_ERR(task))
f1cdae87 8609 return;
c8b2d0bf 8610 rpc_put_task(task);
c8b2d0bf
TM		 8611}
8612
36281caa
TM		 8613static bool nfs41_match_stateid(const nfs4_stateid *s1,
8614 const nfs4_stateid *s2)
8615{
2d2f24ad 8616 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8617 return false;
8618
2d2f24ad 8619 if (s1->seqid == s2->seqid)
36281caa 8620 return true;
2d2f24ad 8621 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8622 return true;
8623
8624 return false;
8625}
8626
557134a3
AA		 8627#endif /* CONFIG_NFS_V4_1 */
8628
36281caa
TM		 8629static bool nfs4_match_stateid(const nfs4_stateid *s1,
8630 const nfs4_stateid *s2)
8631{
f597c537 8632 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8633}
8634
8635
17280175 8636static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8637 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8638 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8639 .recover_open = nfs4_open_reclaim,
8640 .recover_lock = nfs4_lock_reclaim,
591d71cb 8641 .establish_clid = nfs4_init_clientid,
05f4c350 8642 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8643};
8644
591d71cb 8645#if defined(CONFIG_NFS_V4_1)
17280175 8646static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8647 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8648 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8649 .recover_open = nfs4_open_reclaim,
8650 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8651 .establish_clid = nfs41_init_clientid,
fce5c838 8652 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8653 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8654};
8655#endif /* CONFIG_NFS_V4_1 */
8656
17280175 8657static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8658 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8659 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8660 .recover_open = nfs40_open_expired,
591d71cb
AA		 8661 .recover_lock = nfs4_lock_expired,
8662 .establish_clid = nfs4_init_clientid,
8663};
8664
8665#if defined(CONFIG_NFS_V4_1)
17280175 8666static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8667 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8668 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8669 .recover_open = nfs41_open_expired,
8670 .recover_lock = nfs41_lock_expired,
4d643d1d 8671 .establish_clid = nfs41_init_clientid,
1da177e4 8672};
591d71cb 8673#endif /* CONFIG_NFS_V4_1 */
1da177e4 8674
17280175 8675static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8676 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8677 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8678 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8679};
8680
8681#if defined(CONFIG_NFS_V4_1)
17280175 8682static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8683 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8684 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8685 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8686};
8687#endif
8688
ec011fe8 8689static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8690 .get_locations = _nfs40_proc_get_locations,
44c99933 8691 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8692};
8693
8694#if defined(CONFIG_NFS_V4_1)
8695static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8696 .get_locations = _nfs41_proc_get_locations,
44c99933 8697 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8698};
8699#endif /* CONFIG_NFS_V4_1 */
8700
97dc1359
TM		 8701static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8702 .minor_version = 0,
39c6daae
TM		 8703 .init_caps = NFS_CAP_READDIRPLUS
8704 | NFS_CAP_ATOMIC_OPEN
39c6daae 8705 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8706 .init_client = nfs40_init_client,
8707 .shutdown_client = nfs40_shutdown_client,
36281caa 8708 .match_stateid = nfs4_match_stateid,
fca78d6d 8709 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8710 .free_lock_state = nfs4_release_lockowner,
63f5f796 8711 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8712 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8713 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8714 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8715 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8716 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8717};
8718
8719#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8720static struct nfs_seqid *
8721nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8722{
8723 return NULL;
8724}
8725
97dc1359
TM		 8726static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8727 .minor_version = 1,
39c6daae
TM		 8728 .init_caps = NFS_CAP_READDIRPLUS
8729 | NFS_CAP_ATOMIC_OPEN
3b66486c 8730 | NFS_CAP_POSIX_LOCK
49f9a0fa 8731 | NFS_CAP_STATEID_NFSV41
e983120e 8732 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8733 .init_client = nfs41_init_client,
8734 .shutdown_client = nfs41_shutdown_client,
36281caa 8735 .match_stateid = nfs41_match_stateid,
fca78d6d 8736 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8737 .free_lock_state = nfs41_free_lock_state,
63f5f796 8738 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8739 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8740 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8741 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8742 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8743 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8744};
8745#endif
8746
42c2c424
SD		 8747#if defined(CONFIG_NFS_V4_2)
8748static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8749 .minor_version = 2,
7017310a
BS		 8750 .init_caps = NFS_CAP_READDIRPLUS
8751 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8752 | NFS_CAP_POSIX_LOCK
8753 | NFS_CAP_STATEID_NFSV41
e983120e 8754 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8755 | NFS_CAP_ALLOCATE
624bd5b7 8756 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8757 | NFS_CAP_SEEK
8758 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8759 .init_client = nfs41_init_client,
8760 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8761 .match_stateid = nfs41_match_stateid,
8762 .find_root_sec = nfs41_find_root_sec,
7017310a 8763 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8764 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8765 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8766 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8767 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8768 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8769 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8770};
8771#endif
8772
97dc1359
TM		 8773const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8774 [0] = &nfs_v4_0_minor_ops,
8775#if defined(CONFIG_NFS_V4_1)
8776 [1] = &nfs_v4_1_minor_ops,
8777#endif
42c2c424
SD		 8778#if defined(CONFIG_NFS_V4_2)
8779 [2] = &nfs_v4_2_minor_ops,
8780#endif
97dc1359
TM		 8781};
8782
17f26b12 8783static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8784 .create = nfs_create,
8785 .lookup = nfs_lookup,
8786 .atomic_open = nfs_atomic_open,
8787 .link = nfs_link,
8788 .unlink = nfs_unlink,
8789 .symlink = nfs_symlink,
8790 .mkdir = nfs_mkdir,
8791 .rmdir = nfs_rmdir,
8792 .mknod = nfs_mknod,
8793 .rename = nfs_rename,
8794 .permission = nfs_permission,
8795 .getattr = nfs_getattr,
8796 .setattr = nfs_setattr,
8797 .getxattr = generic_getxattr,
8798 .setxattr = generic_setxattr,
8799 .listxattr = generic_listxattr,
8800 .removexattr = generic_removexattr,
8801};
8802
92e1d5be 8803static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8804 .permission = nfs_permission,
8805 .getattr = nfs_getattr,
8806 .setattr = nfs_setattr,
64c2ce8b
AK		 8807 .getxattr = generic_getxattr,
8808 .setxattr = generic_setxattr,
8809 .listxattr = generic_listxattr,
8810 .removexattr = generic_removexattr,
6b3b5496
BF		 8811};
8812
509de811 8813const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8814 .version = 4, /* protocol version */
8815 .dentry_ops = &nfs4_dentry_operations,
8816 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8817 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8818 .file_ops = &nfs4_file_operations,
1da177e4 8819 .getroot = nfs4_proc_get_root,
281cad46 8820 .submount = nfs4_submount,
ff9099f2 8821 .try_mount = nfs4_try_mount,
1da177e4
LT		 8822 .getattr = nfs4_proc_getattr,
8823 .setattr = nfs4_proc_setattr,
8824 .lookup = nfs4_proc_lookup,
8825 .access = nfs4_proc_access,
8826 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8827 .create = nfs4_proc_create,
8828 .remove = nfs4_proc_remove,
8829 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8830 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8831 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8832 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8833 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8834 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8835 .link = nfs4_proc_link,
8836 .symlink = nfs4_proc_symlink,
8837 .mkdir = nfs4_proc_mkdir,
8838 .rmdir = nfs4_proc_remove,
8839 .readdir = nfs4_proc_readdir,
8840 .mknod = nfs4_proc_mknod,
8841 .statfs = nfs4_proc_statfs,
8842 .fsinfo = nfs4_proc_fsinfo,
8843 .pathconf = nfs4_proc_pathconf,
e9326dca 8844 .set_capabilities = nfs4_server_capabilities,
1da177e4 8845 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8846 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8847 .read_setup = nfs4_proc_read_setup,
ec06c096 8848 .read_done = nfs4_read_done,
1da177e4 8849 .write_setup = nfs4_proc_write_setup,
788e7a89 8850 .write_done = nfs4_write_done,
1da177e4 8851 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8852 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8853 .commit_done = nfs4_commit_done,
1da177e4 8854 .lock = nfs4_proc_lock,
e50a1c2e 8855 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8856 .close_context = nfs4_close_context,
2b484297 8857 .open_context = nfs4_atomic_open,
011e2a7f 8858 .have_delegation = nfs4_have_delegation,
57ec14c5 8859 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8860 .alloc_client = nfs4_alloc_client,
45a52a02 8861 .init_client = nfs4_init_client,
cdb7eced 8862 .free_client = nfs4_free_client,
1179acc6
BS		 8863 .create_server = nfs4_create_server,
8864 .clone_server = nfs_clone_server,
1da177e4
LT		 8865};
8866
64c2ce8b
AK		 8867static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8868 .prefix = XATTR_NAME_NFSV4_ACL,
8869 .list = nfs4_xattr_list_nfs4_acl,
8870 .get = nfs4_xattr_get_nfs4_acl,
8871 .set = nfs4_xattr_set_nfs4_acl,
8872};
8873
8874const struct xattr_handler *nfs4_xattr_handlers[] = {
8875 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8876#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8877 &nfs4_xattr_nfs4_label_handler,
8878#endif
64c2ce8b
AK		 8879 NULL
8880};
8881
1da177e4
LT		 8882/*
8883 * Local variables:
8884 * c-basic-offset: 8
8885 * End:
8886 */
Linux 6.x block layer and io_uring tree(s)