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NFSv4: Don't use synchronous delegation recall in exception handling
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
516285eb 81static int nfs4_async_handle_error(struct rpc_task *, 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:
4816fdad
TM		 365 if (inode && nfs_async_inode_return_delegation(inode,
366 NULL) == 0)
367 goto wait_on_recovery;
3114ea7a
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
3114ea7a 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e 413 case -NFS4ERR_DELAY:
2598ed34
TM		 414 nfs_inc_server_stats(server, NFSIOS_DELAY);
415 case -NFS4ERR_GRACE:
b3c2aa07
TM		 416 exception->delay = 1;
417 return 0;
418
a8a4ae3a 419 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 420 case -NFS4ERR_OLD_STATEID:
421 exception->retry = 1;
b064eca2
TM		 422 break;
423 case -NFS4ERR_BADOWNER:
424 /* The following works around a Linux server bug! */
425 case -NFS4ERR_BADNAME:
426 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
427 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
428 exception->retry = 1;
429 printk(KERN_WARNING "NFS: v4 server %s "
430 "does not accept raw "
431 "uid/gids. "
432 "Reenabling the idmapper.\n",
433 server->nfs_client->cl_hostname);
434 }
65de872e
TM		 435 }
436 /* We failed to handle the error */
437 return nfs4_map_errors(ret);
0400a6b0 438wait_on_recovery:
b3c2aa07
TM		 439 exception->recovering = 1;
440 return 0;
441}
442
443/* This is the error handling routine for processes that are allowed
444 * to sleep.
445 */
446int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
447{
448 struct nfs_client *clp = server->nfs_client;
449 int ret;
450
451 ret = nfs4_do_handle_exception(server, errorcode, exception);
452 if (exception->delay) {
453 ret = nfs4_delay(server->client, &exception->timeout);
454 goto out_retry;
455 }
456 if (exception->recovering) {
457 ret = nfs4_wait_clnt_recover(clp);
458 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
459 return -EIO;
460 goto out_retry;
461 }
462 return ret;
463out_retry:
a2c0b9e2
TM		 464 if (ret == 0)
465 exception->retry = 1;
466 return ret;
65de872e
TM		 467}
468
a5250def
WAA		 469/*
470 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
471 * or 'false' otherwise.
472 */
473static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
474{
475 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
476
477 if (flavor == RPC_AUTH_GSS_KRB5I ||
478 flavor == RPC_AUTH_GSS_KRB5P)
479 return true;
480
481 return false;
482}
65de872e 483
452e9352 484static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 485{
1da177e4
LT		 486 spin_lock(&clp->cl_lock);
487 if (time_before(clp->cl_last_renewal,timestamp))
488 clp->cl_last_renewal = timestamp;
489 spin_unlock(&clp->cl_lock);
490}
491
452e9352
TM		 492static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
493{
be824167
TM		 494 struct nfs_client *clp = server->nfs_client;
495
496 if (!nfs4_has_session(clp))
497 do_renew_lease(clp, timestamp);
452e9352
TM		 498}
499
2a3eb2b9
CL		 500struct nfs4_call_sync_data {
501 const struct nfs_server *seq_server;
502 struct nfs4_sequence_args *seq_args;
503 struct nfs4_sequence_res *seq_res;
504};
505
be3a5d23
TM		 506void nfs4_init_sequence(struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 508{
509 args->sa_slot = NULL;
510 args->sa_cache_this = cache_reply;
511 args->sa_privileged = 0;
512
513 res->sr_slot = NULL;
514}
515
516static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
517{
518 args->sa_privileged = 1;
519}
520
cb04ad2a
PT		 521int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
522 struct nfs4_sequence_args *args,
523 struct nfs4_sequence_res *res,
524 struct rpc_task *task)
3bd2384a 525{
3bd2384a
CL		 526 struct nfs4_slot *slot;
527
528 /* slot already allocated? */
529 if (res->sr_slot != NULL)
530 goto out_start;
531
532 spin_lock(&tbl->slot_tbl_lock);
533 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
534 goto out_sleep;
535
536 slot = nfs4_alloc_slot(tbl);
537 if (IS_ERR(slot)) {
538 if (slot == ERR_PTR(-ENOMEM))
539 task->tk_timeout = HZ >> 2;
540 goto out_sleep;
541 }
542 spin_unlock(&tbl->slot_tbl_lock);
543
544 args->sa_slot = slot;
545 res->sr_slot = slot;
546
547out_start:
548 rpc_call_start(task);
549 return 0;
550
551out_sleep:
552 if (args->sa_privileged)
553 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
554 NULL, RPC_PRIORITY_PRIVILEGED);
555 else
556 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
557 spin_unlock(&tbl->slot_tbl_lock);
558 return -EAGAIN;
559}
cb04ad2a 560EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 561
562static int nfs40_sequence_done(struct rpc_task *task,
563 struct nfs4_sequence_res *res)
564{
565 struct nfs4_slot *slot = res->sr_slot;
566 struct nfs4_slot_table *tbl;
567
cab92c19 568 if (slot == NULL)
3bd2384a
CL		 569 goto out;
570
571 tbl = slot->table;
572 spin_lock(&tbl->slot_tbl_lock);
573 if (!nfs41_wake_and_assign_slot(tbl, slot))
574 nfs4_free_slot(tbl, slot);
575 spin_unlock(&tbl->slot_tbl_lock);
576
577 res->sr_slot = NULL;
578out:
579 return 1;
580}
581
cccef3b9
AA		 582#if defined(CONFIG_NFS_V4_1)
583
d185a334 584static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 585{
e3725ec0 586 struct nfs4_session *session;
13615871 587 struct nfs4_slot_table *tbl;
a13ce7c6 588 struct nfs4_slot *slot = res->sr_slot;
c10e4498 589 bool send_new_highest_used_slotid = false;
13615871 590
a13ce7c6 591 tbl = slot->table;
e3725ec0 592 session = tbl->session;
ea028ac9 593
35dc1d74 594 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 595 /* Be nice to the server: try to ensure that the last transmitted
596 * value for highest_user_slotid <= target_highest_slotid
597 */
598 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
599 send_new_highest_used_slotid = true;
600
a13ce7c6 601 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 602 send_new_highest_used_slotid = false;
603 goto out_unlock;
604 }
a13ce7c6 605 nfs4_free_slot(tbl, slot);
c10e4498
TM		 606
607 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
608 send_new_highest_used_slotid = false;
b75ad4cd 609out_unlock:
35dc1d74 610 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 611 res->sr_slot = NULL;
c10e4498 612 if (send_new_highest_used_slotid)
3f10a6af 613 nfs41_notify_server(session->clp);
13615871
AA		 614}
615
f9c96fcc 616int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 617{
e3725ec0 618 struct nfs4_session *session;
a13ce7c6 619 struct nfs4_slot *slot = res->sr_slot;
14516c3a 620 struct nfs_client *clp;
ac20d163 621 bool interrupted = false;
85563073 622 int ret = 1;
b0df806c 623
a13ce7c6
TM		 624 if (slot == NULL)
625 goto out_noaction;
468f8613
BS		 626 /* don't increment the sequence number if the task wasn't sent */
627 if (!RPC_WAS_SENT(task))
b0df806c
AA		 628 goto out;
629
e3725ec0 630 session = slot->table->session;
933602e3 631
ac20d163
TM		 632 if (slot->interrupted) {
633 slot->interrupted = 0;
634 interrupted = true;
635 }
636
2f92ae34 637 trace_nfs4_sequence_done(session, res);
691daf3b 638 /* Check the SEQUENCE operation status */
14516c3a
TM		 639 switch (res->sr_status) {
640 case 0:
b0df806c 641 /* Update the slot's sequence and clientid lease timer */
933602e3 642 ++slot->seq_nr;
e3725ec0 643 clp = session->clp;
8e63b6a8 644 do_renew_lease(clp, res->sr_timestamp);
0629e370 645 /* Check sequence flags */
b15c7cdd 646 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 647 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 648 break;
ac20d163
TM		 649 case 1:
650 /*
651 * sr_status remains 1 if an RPC level error occurred.
652 * The server may or may not have processed the sequence
653 * operation..
654 * Mark the slot as having hosted an interrupted RPC call.
655 */
656 slot->interrupted = 1;
657 goto out;
14516c3a
TM		 658 case -NFS4ERR_DELAY:
659 /* The server detected a resend of the RPC call and
660 * returned NFS4ERR_DELAY as per Section 2.10.6.2
661 * of RFC5661.
662 */
df2fabff 663 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 664 __func__,
df2fabff 665 slot->slot_nr,
933602e3 666 slot->seq_nr);
14516c3a 667 goto out_retry;
85563073
TM		 668 case -NFS4ERR_BADSLOT:
669 /*
670 * The slot id we used was probably retired. Try again
671 * using a different slot id.
672 */
e8794440
TM		 673 goto retry_nowait;
674 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 675 /*
676 * Was the last operation on this sequence interrupted?
677 * If so, retry after bumping the sequence number.
678 */
679 if (interrupted) {
680 ++slot->seq_nr;
681 goto retry_nowait;
682 }
e8794440
TM		 683 /*
684 * Could this slot have been previously retired?
685 * If so, then the server may be expecting seq_nr = 1!
686 */
8e63b6a8
TM		 687 if (slot->seq_nr != 1) {
688 slot->seq_nr = 1;
689 goto retry_nowait;
690 }
691 break;
e8794440
TM		 692 case -NFS4ERR_SEQ_FALSE_RETRY:
693 ++slot->seq_nr;
694 goto retry_nowait;
14516c3a
TM		 695 default:
696 /* Just update the slot sequence no. */
933602e3 697 ++slot->seq_nr;
b0df806c
AA		 698 }
699out:
700 /* The session may be reset by one of the error handlers. */
701 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 702 nfs41_sequence_free_slot(res);
a13ce7c6 703out_noaction:
85563073 704 return ret;
e8794440
TM		 705retry_nowait:
706 if (rpc_restart_call_prepare(task)) {
707 task->tk_status = 0;
708 ret = 0;
709 }
710 goto out;
14516c3a 711out_retry:
d05dd4e9 712 if (!rpc_restart_call(task))
14516c3a
TM		 713 goto out;
714 rpc_delay(task, NFS4_POLL_RETRY_MAX);
715 return 0;
b0df806c 716}
f9c96fcc 717EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 718
2c4b131d 719int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 720{
e3725ec0 721 if (res->sr_slot == NULL)
14516c3a 722 return 1;
3bd2384a
CL		 723 if (!res->sr_slot->table->session)
724 return nfs40_sequence_done(task, res);
14516c3a 725 return nfs41_sequence_done(task, res);
df896455 726}
2c4b131d 727EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 728
dc70d7b3 729int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
ce5039c1
AA		 732 struct rpc_task *task)
733{
fbcd4abc
AA		 734 struct nfs4_slot *slot;
735 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 736
737 dprintk("--> %s\n", __func__);
ce5039c1 738 /* slot already allocated? */
dfb4f309 739 if (res->sr_slot != NULL)
d9afbd1b 740 goto out_success;
ce5039c1 741
fbcd4abc
AA		 742 tbl = &session->fc_slot_table;
743
69d206b5
TM		 744 task->tk_timeout = 0;
745
fbcd4abc 746 spin_lock(&tbl->slot_tbl_lock);
774d5f14 747 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 748 !args->sa_privileged) {
0b1c8fc4 749 /* The state manager will wait until the slot table is empty */
0b1c8fc4 750 dprintk("%s session is draining\n", __func__);
7b939a3f 751 goto out_sleep;
689cf5c1
AB		 752 }
753
2dc03b7f 754 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 755 if (IS_ERR(slot)) {
756 /* If out of memory, try again in 1/4 second */
757 if (slot == ERR_PTR(-ENOMEM))
758 task->tk_timeout = HZ >> 2;
fbcd4abc 759 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 760 goto out_sleep;
fbcd4abc
AA		 761 }
762 spin_unlock(&tbl->slot_tbl_lock);
763
2b2fa717 764 args->sa_slot = slot;
fbcd4abc 765
e8d92382 766 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 767 slot->slot_nr, slot->seq_nr);
fbcd4abc 768
dfb4f309 769 res->sr_slot = slot;
8e63b6a8 770 res->sr_timestamp = jiffies;
2a6e26cd 771 res->sr_status_flags = 0;
fbcd4abc
AA		 772 /*
773 * sr_status is only set in decode_sequence, and so will remain
774 * set to 1 if an rpc level failure occurs.
775 */
776 res->sr_status = 1;
2f92ae34 777 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 778out_success:
779 rpc_call_start(task);
ce5039c1 780 return 0;
7b939a3f 781out_sleep:
8fe72bac
TM		 782 /* Privileged tasks are queued with top priority */
783 if (args->sa_privileged)
1e1093c7
TM		 784 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
785 NULL, RPC_PRIORITY_PRIVILEGED);
786 else
787 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 788 spin_unlock(&tbl->slot_tbl_lock);
789 return -EAGAIN;
ce5039c1 790}
dc70d7b3 791EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 792
5a580e0a
CL		 793static int nfs4_setup_sequence(const struct nfs_server *server,
794 struct nfs4_sequence_args *args,
795 struct nfs4_sequence_res *res,
796 struct rpc_task *task)
ce5039c1 797{
035168ab 798 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 799 int ret = 0;
800
3bd2384a 801 if (!session)
cb04ad2a
PT		 802 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
803 args, res, task);
035168ab 804
e8d92382 805 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 806 __func__, session->clp, session, res->sr_slot ?
e8d92382 807 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 808
9d12b216 809 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 810
ce5039c1
AA		 811 dprintk("<-- %s status=%d\n", __func__, ret);
812 return ret;
813}
814
ce5039c1
AA		 815static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
816{
2a3eb2b9 817 struct nfs4_call_sync_data *data = calldata;
6ba7db34 818 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 819
035168ab
TM		 820 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
821
d9afbd1b 822 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 823}
824
69ab40c4
AA		 825static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
826{
2a3eb2b9 827 struct nfs4_call_sync_data *data = calldata;
69ab40c4 828
14516c3a 829 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 830}
831
17280175 832static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 833 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 834 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 835};
836
3bd2384a
CL		 837#else /* !CONFIG_NFS_V4_1 */
838
9915ea7e
CL		 839static int nfs4_setup_sequence(const struct nfs_server *server,
840 struct nfs4_sequence_args *args,
841 struct nfs4_sequence_res *res,
842 struct rpc_task *task)
843{
cb04ad2a
PT		 844 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
845 args, res, task);
9915ea7e
CL		 846}
847
2c4b131d
PT		 848int nfs4_sequence_done(struct rpc_task *task,
849 struct nfs4_sequence_res *res)
9915ea7e 850{
3bd2384a 851 return nfs40_sequence_done(task, res);
9915ea7e 852}
2c4b131d 853EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 854
855#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 856
857static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
858{
859 struct nfs4_call_sync_data *data = calldata;
860 nfs4_setup_sequence(data->seq_server,
861 data->seq_args, data->seq_res, task);
862}
863
864static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
865{
866 struct nfs4_call_sync_data *data = calldata;
867 nfs4_sequence_done(task, data->seq_res);
868}
869
870static const struct rpc_call_ops nfs40_call_sync_ops = {
871 .rpc_call_prepare = nfs40_call_sync_prepare,
872 .rpc_call_done = nfs40_call_sync_done,
873};
874
7c513058
BS		 875static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
876 struct nfs_server *server,
ce5039c1
AA		 877 struct rpc_message *msg,
878 struct nfs4_sequence_args *args,
8fe72bac 879 struct nfs4_sequence_res *res)
ce5039c1
AA		 880{
881 int ret;
882 struct rpc_task *task;
9915ea7e 883 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 884 struct nfs4_call_sync_data data = {
035168ab 885 .seq_server = server,
ce5039c1
AA		 886 .seq_args = args,
887 .seq_res = res,
ce5039c1
AA		 888 };
889 struct rpc_task_setup task_setup = {
7c513058 890 .rpc_client = clnt,
ce5039c1 891 .rpc_message = msg,
9915ea7e 892 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 893 .callback_data = &data
894 };
895
ce5039c1
AA		 896 task = rpc_run_task(&task_setup);
897 if (IS_ERR(task))
898 ret = PTR_ERR(task);
899 else {
900 ret = task->tk_status;
901 rpc_put_task(task);
902 }
903 return ret;
904}
905
7c513058
BS		 906int nfs4_call_sync(struct rpc_clnt *clnt,
907 struct nfs_server *server,
e73b83f2
BS		 908 struct rpc_message *msg,
909 struct nfs4_sequence_args *args,
910 struct nfs4_sequence_res *res,
911 int cache_reply)
912{
a9c92d6b 913 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 914 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 915}
cccef3b9 916
38478b24 917static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 918{
38478b24 919 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 920
38478b24 921 spin_lock(&dir->i_lock);
359d7d1c 922 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 923 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 924 nfs_force_lookup_revalidate(dir);
a9a4a87a 925 dir->i_version = cinfo->after;
3235b403 926 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 927 nfs_fscache_invalidate(dir);
38478b24 928 spin_unlock(&dir->i_lock);
1da177e4
LT		 929}
930
e56e0b78 931struct nfs4_opendata {
c6d00e63 932 struct kref kref;
e56e0b78
TM		 933 struct nfs_openargs o_arg;
934 struct nfs_openres o_res;
cdd4e68b
TM		 935 struct nfs_open_confirmargs c_arg;
936 struct nfs_open_confirmres c_res;
6926afd1
TM		 937 struct nfs4_string owner_name;
938 struct nfs4_string group_name;
a49c2691 939 struct nfs4_label *a_label;
e56e0b78 940 struct nfs_fattr f_attr;
1775fd3e 941 struct nfs4_label *f_label;
e56e0b78 942 struct dentry *dir;
82a2c1b7 943 struct dentry *dentry;
e56e0b78 944 struct nfs4_state_owner *owner;
aac00a8d 945 struct nfs4_state *state;
e56e0b78 946 struct iattr attrs;
26e976a8 947 unsigned long timestamp;
3e309914 948 unsigned int rpc_done : 1;
5bc2afc2 949 unsigned int file_created : 1;
bdeca1b7 950 unsigned int is_recover : 1;
24ac23ab
TM		 951 int rpc_status;
952 int cancelled;
e56e0b78
TM		 953};
954
49f9a0fa
TM		 955static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
956 int err, struct nfs4_exception *exception)
957{
958 if (err != -EINVAL)
959 return false;
960 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
961 return false;
962 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
963 exception->retry = 1;
964 return true;
965}
966
6ae37339
TM		 967static u32
968nfs4_map_atomic_open_share(struct nfs_server *server,
969 fmode_t fmode, int openflags)
970{
971 u32 res = 0;
972
973 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
974 case FMODE_READ:
975 res = NFS4_SHARE_ACCESS_READ;
976 break;
977 case FMODE_WRITE:
978 res = NFS4_SHARE_ACCESS_WRITE;
979 break;
980 case FMODE_READ|FMODE_WRITE:
981 res = NFS4_SHARE_ACCESS_BOTH;
982 }
983 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
984 goto out;
985 /* Want no delegation if we're using O_DIRECT */
986 if (openflags & O_DIRECT)
987 res |= NFS4_SHARE_WANT_NO_DELEG;
988out:
989 return res;
990}
991
49f9a0fa
TM		 992static enum open_claim_type4
993nfs4_map_atomic_open_claim(struct nfs_server *server,
994 enum open_claim_type4 claim)
995{
996 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
997 return claim;
998 switch (claim) {
999 default:
1000 return claim;
1001 case NFS4_OPEN_CLAIM_FH:
1002 return NFS4_OPEN_CLAIM_NULL;
1003 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1004 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1005 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1006 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1007 }
1008}
2ced46c2
TM		 1009
1010static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1011{
1012 p->o_res.f_attr = &p->f_attr;
1775fd3e 1013 p->o_res.f_label = p->f_label;
c1d51931
TM		 1014 p->o_res.seqid = p->o_arg.seqid;
1015 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1016 p->o_res.server = p->o_arg.server;
5f657530 1017 p->o_res.access_request = p->o_arg.access;
2ced46c2 1018 nfs_fattr_init(&p->f_attr);
6926afd1 1019 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1020}
1021
82a2c1b7 1022static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1023 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1024 const struct iattr *attrs,
1775fd3e 1025 struct nfs4_label *label,
4a1c0893 1026 enum open_claim_type4 claim,
8535b2be 1027 gfp_t gfp_mask)
e56e0b78 1028{
82a2c1b7 1029 struct dentry *parent = dget_parent(dentry);
2b0143b5 1030 struct inode *dir = d_inode(parent);
e56e0b78 1031 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1032 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1033 struct nfs4_opendata *p;
1034
8535b2be 1035 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1036 if (p == NULL)
1037 goto err;
14c43f76
DQ		 1038
1039 p->f_label = nfs4_label_alloc(server, gfp_mask);
1040 if (IS_ERR(p->f_label))
1041 goto err_free_p;
1042
a49c2691
KM		 1043 p->a_label = nfs4_label_alloc(server, gfp_mask);
1044 if (IS_ERR(p->a_label))
1045 goto err_free_f;
1046
63f5f796
TM		 1047 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1048 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1049 if (IS_ERR(p->o_arg.seqid))
14c43f76 1050 goto err_free_label;
82a2c1b7
AV		 1051 nfs_sb_active(dentry->d_sb);
1052 p->dentry = dget(dentry);
e56e0b78
TM		 1053 p->dir = parent;
1054 p->owner = sp;
1055 atomic_inc(&sp->so_count);
dc0b027d
TM		 1056 p->o_arg.open_flags = flags;
1057 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1058 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1059 fmode, flags);
ae2bb032
WAA		 1060 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1061 * will return permission denied for all bits until close */
1062 if (!(flags & O_EXCL)) {
1063 /* ask server to check for all possible rights as results
1064 * are cached */
1065 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1066 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1067 }
7539bbab 1068 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1069 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1070 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1071 p->o_arg.name = &dentry->d_name;
e56e0b78 1072 p->o_arg.server = server;
aa9c2669 1073 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1074 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1075 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1076 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1077 switch (p->o_arg.claim) {
4a1c0893
TM		 1078 case NFS4_OPEN_CLAIM_NULL:
1079 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1080 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1081 p->o_arg.fh = NFS_FH(dir);
1082 break;
1083 case NFS4_OPEN_CLAIM_PREVIOUS:
1084 case NFS4_OPEN_CLAIM_FH:
1085 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1086 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1087 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1088 }
536e43d1 1089 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1090 __u32 verf[2];
d77d76ff 1091
e56e0b78
TM		 1092 p->o_arg.u.attrs = &p->attrs;
1093 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1094
1095 verf[0] = jiffies;
1096 verf[1] = current->pid;
1097 memcpy(p->o_arg.u.verifier.data, verf,
1098 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1099 }
cdd4e68b
TM		 1100 p->c_arg.fh = &p->o_res.fh;
1101 p->c_arg.stateid = &p->o_res.stateid;
1102 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1103 nfs4_init_opendata_res(p);
c6d00e63 1104 kref_init(&p->kref);
e56e0b78 1105 return p;
14c43f76
DQ		 1106
1107err_free_label:
a49c2691
KM		 1108 nfs4_label_free(p->a_label);
1109err_free_f:
14c43f76
DQ		 1110 nfs4_label_free(p->f_label);
1111err_free_p:
e56e0b78
TM		 1112 kfree(p);
1113err:
1114 dput(parent);
1115 return NULL;
1116}
1117
c6d00e63 1118static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1119{
c6d00e63
TM		 1120 struct nfs4_opendata *p = container_of(kref,
1121 struct nfs4_opendata, kref);
82a2c1b7 1122 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1123
1124 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1125 if (p->state != NULL)
1126 nfs4_put_open_state(p->state);
c6d00e63 1127 nfs4_put_state_owner(p->owner);
14c43f76 1128
a49c2691 1129 nfs4_label_free(p->a_label);
14c43f76
DQ		 1130 nfs4_label_free(p->f_label);
1131
c6d00e63 1132 dput(p->dir);
82a2c1b7
AV		 1133 dput(p->dentry);
1134 nfs_sb_deactive(sb);
6926afd1 1135 nfs_fattr_free_names(&p->f_attr);
e911b815 1136 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1137 kfree(p);
1138}
1139
1140static void nfs4_opendata_put(struct nfs4_opendata *p)
1141{
1142 if (p != NULL)
1143 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1144}
1145
06f814a3
TM		 1146static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1147{
06f814a3
TM		 1148 int ret;
1149
06f814a3 1150 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1151 return ret;
1152}
1153
24311f88
TM		 1154static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1155 fmode_t fmode)
1156{
1157 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1158 case FMODE_READ|FMODE_WRITE:
1159 return state->n_rdwr != 0;
1160 case FMODE_WRITE:
1161 return state->n_wronly != 0;
1162 case FMODE_READ:
1163 return state->n_rdonly != 0;
1164 }
1165 WARN_ON_ONCE(1);
1166 return false;
1167}
1168
dc0b027d 1169static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1170{
1171 int ret = 0;
dc0b027d 1172
536e43d1 1173 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1174 goto out;
1175 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1176 case FMODE_READ:
88069f77
TM		 1177 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1178 && state->n_rdonly != 0;
6ee41268
TM		 1179 break;
1180 case FMODE_WRITE:
88069f77
TM		 1181 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1182 && state->n_wronly != 0;
6ee41268
TM		 1183 break;
1184 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1185 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1186 && state->n_rdwr != 0;
6ee41268 1187 }
dc0b027d 1188out:
6ee41268
TM		 1189 return ret;
1190}
1191
2a606188
TM		 1192static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1193 enum open_claim_type4 claim)
aac00a8d 1194{
652f89f6
TM		 1195 if (delegation == NULL)
1196 return 0;
dc0b027d 1197 if ((delegation->type & fmode) != fmode)
aac00a8d 1198 return 0;
d25be546
TM		 1199 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1200 return 0;
2a606188
TM		 1201 switch (claim) {
1202 case NFS4_OPEN_CLAIM_NULL:
1203 case NFS4_OPEN_CLAIM_FH:
1204 break;
1205 case NFS4_OPEN_CLAIM_PREVIOUS:
1206 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1207 break;
1208 default:
1209 return 0;
1210 }
b7391f44 1211 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1212 return 1;
1213}
1214
dc0b027d 1215static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1216{
dc0b027d 1217 switch (fmode) {
e7616923
TM		 1218 case FMODE_WRITE:
1219 state->n_wronly++;
1220 break;
1221 case FMODE_READ:
1222 state->n_rdonly++;
1223 break;
1224 case FMODE_READ|FMODE_WRITE:
1225 state->n_rdwr++;
1226 }
dc0b027d 1227 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1228}
1229
4f14c194
TM		 1230static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1231{
1232 struct nfs_client *clp = state->owner->so_server->nfs_client;
1233 bool need_recover = false;
1234
1235 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1236 need_recover = true;
1237 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1238 need_recover = true;
1239 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1240 need_recover = true;
1241 if (need_recover)
1242 nfs4_state_mark_reclaim_nograce(clp, state);
1243}
1244
e999e80e
TM		 1245static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1246 nfs4_stateid *stateid)
1247{
1248 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1249 return true;
4f14c194
TM		 1250 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1251 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1252 return true;
4f14c194 1253 }
e999e80e
TM		 1254 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1255 return true;
1256 return false;
1257}
1258
f95549cf
TM		 1259static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1260{
3c38cbe2
TM		 1261 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1262 return;
f95549cf
TM		 1263 if (state->n_wronly)
1264 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1265 if (state->n_rdonly)
1266 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1267 if (state->n_rdwr)
1268 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1269 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1270}
1271
226056c5 1272static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1273 nfs4_stateid *arg_stateid,
226056c5 1274 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1275{
226056c5
TM		 1276 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1277 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1278 case FMODE_WRITE:
1279 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1280 break;
1281 case FMODE_READ:
1282 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1283 break;
1284 case 0:
1285 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1286 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1287 clear_bit(NFS_OPEN_STATE, &state->flags);
1288 }
1289 if (stateid == NULL)
1290 return;
f95549cf 1291 /* Handle races with OPEN */
4a1e2feb
TM		 1292 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1293 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1294 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1295 nfs_resync_open_stateid_locked(state);
226056c5 1296 return;
f95549cf 1297 }
003707c7 1298 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1299 nfs4_stateid_copy(&state->stateid, stateid);
1300 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1301}
1302
4a1e2feb
TM		 1303static void nfs_clear_open_stateid(struct nfs4_state *state,
1304 nfs4_stateid *arg_stateid,
1305 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1306{
1307 write_seqlock(&state->seqlock);
4a1e2feb 1308 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1309 write_sequnlock(&state->seqlock);
4f14c194
TM		 1310 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1311 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1312}
1313
dc0b027d 1314static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1315{
dc0b027d 1316 switch (fmode) {
003707c7
TM		 1317 case FMODE_READ:
1318 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1319 break;
1320 case FMODE_WRITE:
1321 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1322 break;
1323 case FMODE_READ|FMODE_WRITE:
1324 set_bit(NFS_O_RDWR_STATE, &state->flags);
1325 }
e999e80e
TM		 1326 if (!nfs_need_update_open_stateid(state, stateid))
1327 return;
1328 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1329 nfs4_stateid_copy(&state->stateid, stateid);
1330 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1331}
1332
dc0b027d 1333static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1334{
8bda4e4c
TM		 1335 /*
1336 * Protect the call to nfs4_state_set_mode_locked and
1337 * serialise the stateid update
1338 */
1339 write_seqlock(&state->seqlock);
003707c7 1340 if (deleg_stateid != NULL) {
f597c537 1341 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1342 set_bit(NFS_DELEGATED_STATE, &state->flags);
1343 }
1344 if (open_stateid != NULL)
dc0b027d 1345 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1346 write_sequnlock(&state->seqlock);
1347 spin_lock(&state->owner->so_lock);
dc0b027d 1348 update_open_stateflags(state, fmode);
ec073428 1349 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1350}
1351
dc0b027d 1352static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1353{
1354 struct nfs_inode *nfsi = NFS_I(state->inode);
1355 struct nfs_delegation *deleg_cur;
1356 int ret = 0;
1357
dc0b027d 1358 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1359
1360 rcu_read_lock();
1361 deleg_cur = rcu_dereference(nfsi->delegation);
1362 if (deleg_cur == NULL)
1363 goto no_delegation;
1364
1365 spin_lock(&deleg_cur->lock);
17f26b12 1366 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1367 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1368 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1369 goto no_delegation_unlock;
1370
1371 if (delegation == NULL)
1372 delegation = &deleg_cur->stateid;
f597c537 1373 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1374 goto no_delegation_unlock;
1375
b7391f44 1376 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1377 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1378 ret = 1;
1379no_delegation_unlock:
1380 spin_unlock(&deleg_cur->lock);
1381no_delegation:
1382 rcu_read_unlock();
1383
1384 if (!ret && open_stateid != NULL) {
dc0b027d 1385 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1386 ret = 1;
1387 }
4f14c194
TM		 1388 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1389 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1390
1391 return ret;
1392}
1393
39071e6f
TM		 1394static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1395 const nfs4_stateid *stateid)
1396{
1397 struct nfs4_state *state = lsp->ls_state;
1398 bool ret = false;
1399
1400 spin_lock(&state->state_lock);
1401 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1402 goto out_noupdate;
1403 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1404 goto out_noupdate;
1405 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1406 ret = true;
1407out_noupdate:
1408 spin_unlock(&state->state_lock);
1409 return ret;
1410}
34310430 1411
dc0b027d 1412static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1413{
1414 struct nfs_delegation *delegation;
1415
1416 rcu_read_lock();
1417 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1418 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1419 rcu_read_unlock();
1420 return;
1421 }
1422 rcu_read_unlock();
57ec14c5 1423 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1424}
1425
6ee41268 1426static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1427{
1428 struct nfs4_state *state = opendata->state;
1429 struct nfs_inode *nfsi = NFS_I(state->inode);
1430 struct nfs_delegation *delegation;
f448badd 1431 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1432 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1433 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1434 nfs4_stateid stateid;
1435 int ret = -EAGAIN;
1436
aac00a8d 1437 for (;;) {
61beef75 1438 spin_lock(&state->owner->so_lock);
dc0b027d 1439 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1440 update_open_stateflags(state, fmode);
6ee41268 1441 spin_unlock(&state->owner->so_lock);
61beef75 1442 goto out_return_state;
6ee41268 1443 }
61beef75 1444 spin_unlock(&state->owner->so_lock);
34310430
TM		 1445 rcu_read_lock();
1446 delegation = rcu_dereference(nfsi->delegation);
2a606188 1447 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1448 rcu_read_unlock();
aac00a8d 1449 break;
34310430 1450 }
aac00a8d 1451 /* Save the delegation */
f597c537 1452 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1453 rcu_read_unlock();
fa332941 1454 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1455 if (!opendata->is_recover) {
1456 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1457 if (ret != 0)
1458 goto out;
1459 }
aac00a8d 1460 ret = -EAGAIN;
34310430
TM		 1461
1462 /* Try to update the stateid using the delegation */
dc0b027d 1463 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1464 goto out_return_state;
aac00a8d 1465 }
aac00a8d
TM		 1466out:
1467 return ERR_PTR(ret);
1468out_return_state:
1469 atomic_inc(&state->count);
1470 return state;
1471}
1472
e23008ec
AA		 1473static void
1474nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1475{
1476 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1477 struct nfs_delegation *delegation;
1478 int delegation_flags = 0;
1479
1480 rcu_read_lock();
1481 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1482 if (delegation)
1483 delegation_flags = delegation->flags;
1484 rcu_read_unlock();
72d79ff8
TM		 1485 switch (data->o_arg.claim) {
1486 default:
1487 break;
1488 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1489 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1490 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1491 "returning a delegation for "
1492 "OPEN(CLAIM_DELEGATE_CUR)\n",
1493 clp->cl_hostname);
72d79ff8
TM		 1494 return;
1495 }
1496 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1497 nfs_inode_set_delegation(state->inode,
1498 data->owner->so_cred,
1499 &data->o_res);
1500 else
1501 nfs_inode_reclaim_delegation(state->inode,
1502 data->owner->so_cred,
1503 &data->o_res);
1504}
1505
1506/*
1507 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1508 * and update the nfs4_state.
1509 */
1510static struct nfs4_state *
1511_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1512{
1513 struct inode *inode = data->state->inode;
1514 struct nfs4_state *state = data->state;
1515 int ret;
1516
d2bfda2e
WAA		 1517 if (!data->rpc_done) {
1518 if (data->rpc_status) {
1519 ret = data->rpc_status;
1520 goto err;
1521 }
1522 /* cached opens have already been processed */
1523 goto update;
e23008ec
AA		 1524 }
1525
e23008ec
AA		 1526 ret = nfs_refresh_inode(inode, &data->f_attr);
1527 if (ret)
1528 goto err;
1529
1530 if (data->o_res.delegation_type != 0)
1531 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1532update:
e23008ec
AA		 1533 update_open_stateid(state, &data->o_res.stateid, NULL,
1534 data->o_arg.fmode);
d49f042a 1535 atomic_inc(&state->count);
e23008ec
AA		 1536
1537 return state;
1538err:
1539 return ERR_PTR(ret);
1540
1541}
1542
1543static struct nfs4_state *
1544_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1545{
1546 struct inode *inode;
1547 struct nfs4_state *state = NULL;
1b370bc2 1548 int ret;
24ac23ab 1549
aac00a8d 1550 if (!data->rpc_done) {
6ee41268 1551 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1552 goto out;
1553 }
1554
1b370bc2 1555 ret = -EAGAIN;
24ac23ab 1556 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1557 goto err;
1775fd3e 1558 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1559 ret = PTR_ERR(inode);
03f28e3a 1560 if (IS_ERR(inode))
1b370bc2
TM		 1561 goto err;
1562 ret = -ENOMEM;
24ac23ab
TM		 1563 state = nfs4_get_open_state(inode, data->owner);
1564 if (state == NULL)
1b370bc2 1565 goto err_put_inode;
e23008ec
AA		 1566 if (data->o_res.delegation_type != 0)
1567 nfs4_opendata_check_deleg(data, state);
34310430 1568 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1569 data->o_arg.fmode);
24ac23ab 1570 iput(inode);
aac00a8d 1571out:
7aa262b5 1572 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1573 return state;
1b370bc2
TM		 1574err_put_inode:
1575 iput(inode);
1576err:
1577 return ERR_PTR(ret);
24ac23ab
TM		 1578}
1579
e23008ec
AA		 1580static struct nfs4_state *
1581nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1582{
1583 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1584 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1585 return _nfs4_opendata_to_nfs4_state(data);
1586}
1587
864472e9
TM		 1588static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1589{
1590 struct nfs_inode *nfsi = NFS_I(state->inode);
1591 struct nfs_open_context *ctx;
1592
1593 spin_lock(&state->inode->i_lock);
1594 list_for_each_entry(ctx, &nfsi->open_files, list) {
1595 if (ctx->state != state)
1596 continue;
1597 get_nfs_open_context(ctx);
1598 spin_unlock(&state->inode->i_lock);
1599 return ctx;
1600 }
1601 spin_unlock(&state->inode->i_lock);
1602 return ERR_PTR(-ENOENT);
1603}
1604
4a1c0893
TM		 1605static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1606 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1607{
1608 struct nfs4_opendata *opendata;
1609
4a1c0893 1610 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1611 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1612 if (opendata == NULL)
1613 return ERR_PTR(-ENOMEM);
1614 opendata->state = state;
1615 atomic_inc(&state->count);
1616 return opendata;
1617}
1618
24311f88
TM		 1619static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1620 fmode_t fmode)
864472e9 1621{
2ced46c2 1622 struct nfs4_state *newstate;
864472e9
TM		 1623 int ret;
1624
24311f88 1625 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1626 return 0;
dc0b027d
TM		 1627 opendata->o_arg.open_flags = 0;
1628 opendata->o_arg.fmode = fmode;
be36e185
TM		 1629 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1630 NFS_SB(opendata->dentry->d_sb),
1631 fmode, 0);
2ced46c2
TM		 1632 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1633 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1634 nfs4_init_opendata_res(opendata);
b257957e 1635 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1636 if (ret != 0)
1637 return ret;
2ced46c2 1638 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1639 if (IS_ERR(newstate))
1640 return PTR_ERR(newstate);
24311f88
TM		 1641 if (newstate != opendata->state)
1642 ret = -ESTALE;
643168c2 1643 nfs4_close_state(newstate, fmode);
24311f88 1644 return ret;
864472e9
TM		 1645}
1646
1647static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1648{
864472e9
TM		 1649 int ret;
1650
4f14c194
TM		 1651 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1652 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1653 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1654 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1655 /* memory barrier prior to reading state->n_* */
2ced46c2 1656 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1657 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1658 smp_rmb();
24311f88
TM		 1659 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1660 if (ret != 0)
1661 return ret;
1662 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1663 if (ret != 0)
1664 return ret;
1665 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1666 if (ret != 0)
1667 return ret;
1ac7e2fd
TM		 1668 /*
1669 * We may have performed cached opens for all three recoveries.
1670 * Check if we need to update the current stateid.
1671 */
1672 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1673 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1674 write_seqlock(&state->seqlock);
1ac7e2fd 1675 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1676 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1677 write_sequnlock(&state->seqlock);
1ac7e2fd 1678 }
864472e9
TM		 1679 return 0;
1680}
1681
1da177e4
LT		 1682/*
1683 * OPEN_RECLAIM:
1684 * reclaim state on the server after a reboot.
1da177e4 1685 */
539cd03a 1686static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1687{
1ac7e2fd 1688 struct nfs_delegation *delegation;
864472e9 1689 struct nfs4_opendata *opendata;
dc0b027d 1690 fmode_t delegation_type = 0;
1da177e4
LT		 1691 int status;
1692
4a1c0893
TM		 1693 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1694 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1695 if (IS_ERR(opendata))
1696 return PTR_ERR(opendata);
1ac7e2fd
TM		 1697 rcu_read_lock();
1698 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1699 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1700 delegation_type = delegation->type;
1ac7e2fd 1701 rcu_read_unlock();
864472e9
TM		 1702 opendata->o_arg.u.delegation_type = delegation_type;
1703 status = nfs4_open_recover(opendata, state);
c6d00e63 1704 nfs4_opendata_put(opendata);
1da177e4
LT		 1705 return status;
1706}
1707
539cd03a 1708static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1709{
1710 struct nfs_server *server = NFS_SERVER(state->inode);
1711 struct nfs4_exception exception = { };
1712 int err;
1713 do {
539cd03a 1714 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1715 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1716 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1717 continue;
168667c4 1718 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1719 break;
1720 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1721 } while (exception.retry);
1722 return err;
1723}
1724
864472e9
TM		 1725static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1726{
1727 struct nfs_open_context *ctx;
1728 int ret;
1729
1730 ctx = nfs4_state_find_open_context(state);
1731 if (IS_ERR(ctx))
91876b13 1732 return -EAGAIN;
539cd03a 1733 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1734 put_nfs_open_context(ctx);
1735 return ret;
1736}
1737
db4f2e63 1738static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1739{
be76b5b6
TM		 1740 switch (err) {
1741 default:
1742 printk(KERN_ERR "NFS: %s: unhandled error "
1743 "%d.\n", __func__, err);
1744 case 0:
1745 case -ENOENT:
8eee52af 1746 case -EAGAIN:
be76b5b6
TM		 1747 case -ESTALE:
1748 break;
1749 case -NFS4ERR_BADSESSION:
1750 case -NFS4ERR_BADSLOT:
1751 case -NFS4ERR_BAD_HIGH_SLOT:
1752 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1753 case -NFS4ERR_DEADSESSION:
1754 set_bit(NFS_DELEGATED_STATE, &state->flags);
1755 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1756 return -EAGAIN;
1757 case -NFS4ERR_STALE_CLIENTID:
1758 case -NFS4ERR_STALE_STATEID:
1759 set_bit(NFS_DELEGATED_STATE, &state->flags);
1760 case -NFS4ERR_EXPIRED:
1761 /* Don't recall a delegation if it was lost */
1762 nfs4_schedule_lease_recovery(server->nfs_client);
1763 return -EAGAIN;
352297b9
CL		 1764 case -NFS4ERR_MOVED:
1765 nfs4_schedule_migration_recovery(server);
1766 return -EAGAIN;
8ef2f8d4
CL		 1767 case -NFS4ERR_LEASE_MOVED:
1768 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1769 return -EAGAIN;
be76b5b6
TM		 1770 case -NFS4ERR_DELEG_REVOKED:
1771 case -NFS4ERR_ADMIN_REVOKED:
1772 case -NFS4ERR_BAD_STATEID:
db4f2e63 1773 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1774 nfs_inode_find_state_and_recover(state->inode,
1775 stateid);
1776 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1777 return -EAGAIN;
be76b5b6
TM		 1778 case -NFS4ERR_DELAY:
1779 case -NFS4ERR_GRACE:
1780 set_bit(NFS_DELEGATED_STATE, &state->flags);
1781 ssleep(1);
1782 return -EAGAIN;
db4f2e63
TM		 1783 case -ENOMEM:
1784 case -NFS4ERR_DENIED:
1785 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1786 return 0;
be76b5b6 1787 }
1da177e4
LT		 1788 return err;
1789}
1790
24311f88
TM		 1791int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1792 struct nfs4_state *state, const nfs4_stateid *stateid,
1793 fmode_t type)
db4f2e63
TM		 1794{
1795 struct nfs_server *server = NFS_SERVER(state->inode);
1796 struct nfs4_opendata *opendata;
24311f88 1797 int err = 0;
db4f2e63
TM		 1798
1799 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1800 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1801 if (IS_ERR(opendata))
1802 return PTR_ERR(opendata);
1803 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1804 write_seqlock(&state->seqlock);
1805 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1806 write_sequnlock(&state->seqlock);
24311f88
TM		 1807 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1808 switch (type & (FMODE_READ|FMODE_WRITE)) {
1809 case FMODE_READ|FMODE_WRITE:
1810 case FMODE_WRITE:
1811 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1812 if (err)
1813 break;
1814 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1815 if (err)
1816 break;
1817 case FMODE_READ:
1818 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1819 }
db4f2e63
TM		 1820 nfs4_opendata_put(opendata);
1821 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1822}
1823
be05c860
CL		 1824static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1825{
1826 struct nfs4_opendata *data = calldata;
1827
cb04ad2a
PT		 1828 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1829 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1830}
1831
cdd4e68b
TM		 1832static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1833{
1834 struct nfs4_opendata *data = calldata;
1835
17ead6c8 1836 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1837
cdd4e68b 1838 data->rpc_status = task->tk_status;
26e976a8 1839 if (data->rpc_status == 0) {
f597c537 1840 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1841 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1842 renew_lease(data->o_res.server, data->timestamp);
3e309914 1843 data->rpc_done = 1;
26e976a8 1844 }
cdd4e68b
TM		 1845}
1846
1847static void nfs4_open_confirm_release(void *calldata)
1848{
1849 struct nfs4_opendata *data = calldata;
1850 struct nfs4_state *state = NULL;
1851
1852 /* If this request hasn't been cancelled, do nothing */
1853 if (data->cancelled == 0)
1854 goto out_free;
1855 /* In case of error, no cleanup! */
3e309914 1856 if (!data->rpc_done)
cdd4e68b 1857 goto out_free;
cdd4e68b 1858 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1859 if (!IS_ERR(state))
643168c2 1860 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1861out_free:
c6d00e63 1862 nfs4_opendata_put(data);
cdd4e68b
TM		 1863}
1864
1865static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1866 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1867 .rpc_call_done = nfs4_open_confirm_done,
1868 .rpc_release = nfs4_open_confirm_release,
1869};
1870
1871/*
1872 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1873 */
1874static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1875{
2b0143b5 1876 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1877 struct rpc_task *task;
5138fde0
TM		 1878 struct rpc_message msg = {
1879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1880 .rpc_argp = &data->c_arg,
1881 .rpc_resp = &data->c_res,
1882 .rpc_cred = data->owner->so_cred,
1883 };
c970aa85
TM		 1884 struct rpc_task_setup task_setup_data = {
1885 .rpc_client = server->client,
5138fde0 1886 .rpc_message = &msg,
c970aa85
TM		 1887 .callback_ops = &nfs4_open_confirm_ops,
1888 .callback_data = data,
101070ca 1889 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1890 .flags = RPC_TASK_ASYNC,
1891 };
1da177e4
LT		 1892 int status;
1893
17ead6c8 1894 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1895 kref_get(&data->kref);
3e309914
TM		 1896 data->rpc_done = 0;
1897 data->rpc_status = 0;
5138fde0 1898 data->timestamp = jiffies;
e92c1e0d
BC		 1899 if (data->is_recover)
1900 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1901 task = rpc_run_task(&task_setup_data);
7a1218a2 1902 if (IS_ERR(task))
cdd4e68b 1903 return PTR_ERR(task);
cdd4e68b
TM		 1904 status = nfs4_wait_for_completion_rpc_task(task);
1905 if (status != 0) {
1906 data->cancelled = 1;
1907 smp_wmb();
1908 } else
1909 status = data->rpc_status;
e6b3c4db 1910 rpc_put_task(task);
1da177e4
LT		 1911 return status;
1912}
1913
24ac23ab 1914static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1915{
24ac23ab
TM		 1916 struct nfs4_opendata *data = calldata;
1917 struct nfs4_state_owner *sp = data->owner;
549b19cc 1918 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1919 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1920
24ac23ab 1921 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1922 goto out_wait;
aac00a8d
TM		 1923 /*
1924 * Check if we still need to send an OPEN call, or if we can use
1925 * a delegation instead.
1926 */
1927 if (data->state != NULL) {
1928 struct nfs_delegation *delegation;
1929
dc0b027d 1930 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1931 goto out_no_action;
aac00a8d
TM		 1932 rcu_read_lock();
1933 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1934 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1935 goto unlock_no_action;
aac00a8d
TM		 1936 rcu_read_unlock();
1937 }
95b72eb0 1938 /* Update client id. */
549b19cc 1939 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1940 switch (claim) {
1941 default:
1942 break;
8188df17
TM		 1943 case NFS4_OPEN_CLAIM_PREVIOUS:
1944 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1945 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1946 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1947 case NFS4_OPEN_CLAIM_FH:
1948 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1949 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1950 }
26e976a8 1951 data->timestamp = jiffies;
035168ab 1952 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1953 &data->o_arg.seq_args,
2240a9e2
TM		 1954 &data->o_res.seq_res,
1955 task) != 0)
1956 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1957
1958 /* Set the create mode (note dependency on the session type) */
1959 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1960 if (data->o_arg.open_flags & O_EXCL) {
1961 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1962 if (nfs4_has_persistent_session(clp))
1963 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1964 else if (clp->cl_mvops->minor_version > 0)
1965 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1966 }
6ee41268 1967 return;
652f89f6
TM		 1968unlock_no_action:
1969 rcu_read_unlock();
6ee41268
TM		 1970out_no_action:
1971 task->tk_action = NULL;
c8da19b9 1972out_wait:
b75ad4cd 1973 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1974}
1975
24ac23ab
TM		 1976static void nfs4_open_done(struct rpc_task *task, void *calldata)
1977{
1978 struct nfs4_opendata *data = calldata;
1da177e4 1979
24ac23ab 1980 data->rpc_status = task->tk_status;
d898528c 1981
14516c3a
TM		 1982 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1983 return;
d898528c 1984
24ac23ab 1985 if (task->tk_status == 0) {
807d66d8
TM		 1986 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1987 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1988 case S_IFREG:
1989 break;
1990 case S_IFLNK:
24ac23ab 1991 data->rpc_status = -ELOOP;
6f926b5b
TM		 1992 break;
1993 case S_IFDIR:
24ac23ab 1994 data->rpc_status = -EISDIR;
6f926b5b
TM		 1995 break;
1996 default:
24ac23ab 1997 data->rpc_status = -ENOTDIR;
807d66d8 1998 }
6f926b5b 1999 }
26e976a8 2000 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2001 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2002 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2003 }
3e309914 2004 data->rpc_done = 1;
24ac23ab 2005}
6f926b5b 2006
24ac23ab
TM		 2007static void nfs4_open_release(void *calldata)
2008{
2009 struct nfs4_opendata *data = calldata;
2010 struct nfs4_state *state = NULL;
2011
2012 /* If this request hasn't been cancelled, do nothing */
2013 if (data->cancelled == 0)
2014 goto out_free;
2015 /* In case of error, no cleanup! */
3e309914 2016 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2017 goto out_free;
2018 /* In case we need an open_confirm, no cleanup! */
2019 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2020 goto out_free;
24ac23ab 2021 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2022 if (!IS_ERR(state))
643168c2 2023 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2024out_free:
c6d00e63 2025 nfs4_opendata_put(data);
24ac23ab
TM		 2026}
2027
2028static const struct rpc_call_ops nfs4_open_ops = {
2029 .rpc_call_prepare = nfs4_open_prepare,
2030 .rpc_call_done = nfs4_open_done,
2031 .rpc_release = nfs4_open_release,
2032};
2033
b257957e 2034static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2035{
2b0143b5 2036 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2037 struct nfs_server *server = NFS_SERVER(dir);
2038 struct nfs_openargs *o_arg = &data->o_arg;
2039 struct nfs_openres *o_res = &data->o_res;
2040 struct rpc_task *task;
5138fde0
TM		 2041 struct rpc_message msg = {
2042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2043 .rpc_argp = o_arg,
2044 .rpc_resp = o_res,
2045 .rpc_cred = data->owner->so_cred,
2046 };
c970aa85
TM		 2047 struct rpc_task_setup task_setup_data = {
2048 .rpc_client = server->client,
5138fde0 2049 .rpc_message = &msg,
c970aa85
TM		 2050 .callback_ops = &nfs4_open_ops,
2051 .callback_data = data,
101070ca 2052 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2053 .flags = RPC_TASK_ASYNC,
2054 };
24ac23ab
TM		 2055 int status;
2056
a9c92d6b 2057 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2058 kref_get(&data->kref);
3e309914
TM		 2059 data->rpc_done = 0;
2060 data->rpc_status = 0;
2ced46c2 2061 data->cancelled = 0;
bdeca1b7
TM		 2062 data->is_recover = 0;
2063 if (isrecover) {
8fe72bac 2064 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2065 data->is_recover = 1;
2066 }
c970aa85 2067 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2068 if (IS_ERR(task))
2069 return PTR_ERR(task);
2070 status = nfs4_wait_for_completion_rpc_task(task);
2071 if (status != 0) {
2072 data->cancelled = 1;
2073 smp_wmb();
2074 } else
2075 status = data->rpc_status;
2076 rpc_put_task(task);
2077
2078 return status;
2079}
2080
2081static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2082{
2b0143b5 2083 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2084 struct nfs_openres *o_res = &data->o_res;
2085 int status;
2086
2087 status = nfs4_run_open_task(data, 1);
2088 if (status != 0 || !data->rpc_done)
2089 return status;
2090
6926afd1
TM		 2091 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2092
b257957e
AB		 2093 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2094 status = _nfs4_proc_open_confirm(data);
2095 if (status != 0)
2096 return status;
2097 }
2098
2099 return status;
2100}
2101
f3792d63
TM		 2102/*
2103 * Additional permission checks in order to distinguish between an
2104 * open for read, and an open for execute. This works around the
2105 * fact that NFSv4 OPEN treats read and execute permissions as being
2106 * the same.
2107 * Note that in the non-execute case, we want to turn off permission
2108 * checking if we just created a new file (POSIX open() semantics).
2109 */
6168f62c
WAA		 2110static int nfs4_opendata_access(struct rpc_cred *cred,
2111 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2112 struct nfs4_state *state, fmode_t fmode,
2113 int openflags)
6168f62c
WAA		 2114{
2115 struct nfs_access_entry cache;
2116 u32 mask;
2117
2118 /* access call failed or for some reason the server doesn't
2119 * support any access modes -- defer access call until later */
2120 if (opendata->o_res.access_supported == 0)
2121 return 0;
2122
2123 mask = 0;
f3792d63
TM		 2124 /*
2125 * Use openflags to check for exec, because fmode won't
2126 * always have FMODE_EXEC set when file open for exec.
2127 */
f8d9a897
WAA		 2128 if (openflags & __FMODE_EXEC) {
2129 /* ONLY check for exec rights */
2130 mask = MAY_EXEC;
f3792d63 2131 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2132 mask = MAY_READ;
6168f62c
WAA		 2133
2134 cache.cred = cred;
2135 cache.jiffies = jiffies;
2136 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2137 nfs_access_add_cache(state->inode, &cache);
2138
bbd3a8ee 2139 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2140 return 0;
2141
2142 /* even though OPEN succeeded, access is denied. Close the file */
2143 nfs4_close_state(state, fmode);
998f40b5 2144 return -EACCES;
6168f62c
WAA		 2145}
2146
b257957e
AB		 2147/*
2148 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2149 */
2150static int _nfs4_proc_open(struct nfs4_opendata *data)
2151{
2b0143b5 2152 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2153 struct nfs_server *server = NFS_SERVER(dir);
2154 struct nfs_openargs *o_arg = &data->o_arg;
2155 struct nfs_openres *o_res = &data->o_res;
2156 int status;
2157
2158 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2159 if (!data->rpc_done)
2160 return status;
2161 if (status != 0) {
2162 if (status == -NFS4ERR_BADNAME &&
2163 !(o_arg->open_flags & O_CREAT))
2164 return -ENOENT;
24ac23ab 2165 return status;
08ef7bd3 2166 }
24ac23ab 2167
6926afd1
TM		 2168 nfs_fattr_map_and_free_names(server, &data->f_attr);
2169
5bc2afc2 2170 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2171 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2172 if (o_arg->open_flags & O_EXCL)
2173 data->file_created = 1;
2174 else if (o_res->cinfo.before != o_res->cinfo.after)
2175 data->file_created = 1;
2176 }
0df5dd4a
TM		 2177 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2178 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2179 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2180 status = _nfs4_proc_open_confirm(data);
1da177e4 2181 if (status != 0)
24ac23ab 2182 return status;
1da177e4
LT		 2183 }
2184 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2185 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2186 return 0;
1da177e4
LT		 2187}
2188
d83217c1
AA		 2189static int nfs4_recover_expired_lease(struct nfs_server *server)
2190{
2191 return nfs4_client_recover_expired_lease(server->nfs_client);
2192}
2193
1da177e4
LT		 2194/*
2195 * OPEN_EXPIRED:
2196 * reclaim state on the server after a network partition.
2197 * Assumes caller holds the appropriate lock
2198 */
539cd03a 2199static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2200{
e56e0b78 2201 struct nfs4_opendata *opendata;
864472e9 2202 int ret;
1da177e4 2203
4a1c0893 2204 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2205 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2206 if (IS_ERR(opendata))
2207 return PTR_ERR(opendata);
864472e9 2208 ret = nfs4_open_recover(opendata, state);
35d05778 2209 if (ret == -ESTALE)
3d4ff43d 2210 d_drop(ctx->dentry);
c6d00e63 2211 nfs4_opendata_put(opendata);
864472e9 2212 return ret;
1da177e4
LT		 2213}
2214
a9ed2e25 2215static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2216{
539cd03a 2217 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2218 struct nfs4_exception exception = { };
2219 int err;
2220
2221 do {
539cd03a 2222 err = _nfs4_open_expired(ctx, state);
42113a75 2223 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2224 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2225 continue;
a9ed2e25
TM		 2226 switch (err) {
2227 default:
2228 goto out;
2229 case -NFS4ERR_GRACE:
2230 case -NFS4ERR_DELAY:
2231 nfs4_handle_exception(server, err, &exception);
2232 err = 0;
2233 }
202b50dc 2234 } while (exception.retry);
a9ed2e25 2235out:
202b50dc
TM		 2236 return err;
2237}
2238
1da177e4
LT		 2239static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2240{
1da177e4 2241 struct nfs_open_context *ctx;
864472e9 2242 int ret;
1da177e4 2243
864472e9
TM		 2244 ctx = nfs4_state_find_open_context(state);
2245 if (IS_ERR(ctx))
91876b13 2246 return -EAGAIN;
539cd03a 2247 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2248 put_nfs_open_context(ctx);
2249 return ret;
1da177e4
LT		 2250}
2251
4dfd4f7a
TM		 2252static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2253{
2254 nfs_remove_bad_delegation(state->inode);
2255 write_seqlock(&state->seqlock);
2256 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2257 write_sequnlock(&state->seqlock);
2258 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2259}
2260
2261static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2262{
2263 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2264 nfs_finish_clear_delegation_stateid(state);
2265}
2266
2267static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2268{
2269 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2270 nfs40_clear_delegation_stateid(state);
2271 return nfs4_open_expired(sp, state);
2272}
2273
f062eb6c 2274#if defined(CONFIG_NFS_V4_1)
0c116cad 2275static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2276{
f062eb6c 2277 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2278 nfs4_stateid stateid;
ab7cb0df 2279 struct nfs_delegation *delegation;
0c116cad
TM		 2280 struct rpc_cred *cred;
2281 int status;
3e60ffdd 2282
ab7cb0df
TM		 2283 /* Get the delegation credential for use by test/free_stateid */
2284 rcu_read_lock();
2285 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2286 if (delegation == NULL) {
ab7cb0df 2287 rcu_read_unlock();
0c116cad
TM		 2288 return;
2289 }
2290
2291 nfs4_stateid_copy(&stateid, &delegation->stateid);
2292 cred = get_rpccred(delegation->cred);
2293 rcu_read_unlock();
2294 status = nfs41_test_stateid(server, &stateid, cred);
2295 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2296
3e60ffdd
CL		 2297 if (status != NFS_OK) {
2298 /* Free the stateid unless the server explicitly
2299 * informs us the stateid is unrecognized. */
2300 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2301 nfs41_free_stateid(server, &stateid, cred);
2302 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2303 }
ab7cb0df 2304
0c116cad 2305 put_rpccred(cred);
3e60ffdd
CL		 2306}
2307
2308/**
2309 * nfs41_check_open_stateid - possibly free an open stateid
2310 *
2311 * @state: NFSv4 state for an inode
2312 *
2313 * Returns NFS_OK if recovery for this stateid is now finished.
2314 * Otherwise a negative NFS4ERR value is returned.
2315 */
2316static int nfs41_check_open_stateid(struct nfs4_state *state)
2317{
2318 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2319 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2320 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2321 int status;
2322
2323 /* If a state reset has been done, test_stateid is unneeded */
2324 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2325 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2326 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2327 return -NFS4ERR_BAD_STATEID;
2328
ab7cb0df 2329 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2330 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2331 if (status != NFS_OK) {
2332 /* Free the stateid unless the server explicitly
2333 * informs us the stateid is unrecognized. */
2334 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2335 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2336
2337 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2338 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2339 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2340 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2341 }
2342 return status;
2343}
2344
2345static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2346{
eb64cf96 2347 int status;
b01dd1d8 2348
0c116cad 2349 nfs41_check_delegation_stateid(state);
3e60ffdd 2350 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2351 if (status != NFS_OK)
2352 status = nfs4_open_expired(sp, state);
2353 return status;
f062eb6c
BS		 2354}
2355#endif
2356
aa53ed54
JL		 2357/*
2358 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2359 * fields corresponding to attributes that were used to store the verifier.
2360 * Make sure we clobber those fields in the later setattr call
2361 */
5334c5bd
KM		 2362static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2363 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2364{
5334c5bd
KM		 2365 const u32 *attrset = opendata->o_res.attrset;
2366
2367 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2368 !(sattr->ia_valid & ATTR_ATIME_SET))
2369 sattr->ia_valid |= ATTR_ATIME;
2370
5334c5bd 2371 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2372 !(sattr->ia_valid & ATTR_MTIME_SET))
2373 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2374
2375 /* Except MODE, it seems harmless of setting twice. */
2376 if ((attrset[1] & FATTR4_WORD1_MODE))
2377 sattr->ia_valid &= ~ATTR_MODE;
2378
2379 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2380 *label = NULL;
aa53ed54
JL		 2381}
2382
c21443c2
TM		 2383static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2384 fmode_t fmode,
2385 int flags,
3efb9722 2386 struct nfs_open_context *ctx)
c21443c2
TM		 2387{
2388 struct nfs4_state_owner *sp = opendata->owner;
2389 struct nfs_server *server = sp->so_server;
275bb307 2390 struct dentry *dentry;
c21443c2
TM		 2391 struct nfs4_state *state;
2392 unsigned int seq;
2393 int ret;
2394
2395 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2396
2397 ret = _nfs4_proc_open(opendata);
dca78001 2398 if (ret != 0)
c21443c2
TM		 2399 goto out;
2400
2401 state = nfs4_opendata_to_nfs4_state(opendata);
2402 ret = PTR_ERR(state);
2403 if (IS_ERR(state))
2404 goto out;
2405 if (server->caps & NFS_CAP_POSIX_LOCK)
2406 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2407
275bb307 2408 dentry = opendata->dentry;
2b0143b5 2409 if (d_really_is_negative(dentry)) {
275bb307
TM		 2410 /* FIXME: Is this d_drop() ever needed? */
2411 d_drop(dentry);
2412 dentry = d_add_unique(dentry, igrab(state->inode));
2413 if (dentry == NULL) {
2414 dentry = opendata->dentry;
2415 } else if (dentry != ctx->dentry) {
2416 dput(ctx->dentry);
2417 ctx->dentry = dget(dentry);
2418 }
2419 nfs_set_verifier(dentry,
2b0143b5 2420 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2421 }
2422
c21443c2
TM		 2423 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2424 if (ret != 0)
2425 goto out;
2426
3efb9722 2427 ctx->state = state;
2b0143b5 2428 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2429 nfs_inode_attach_open_context(ctx);
2430 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2431 nfs4_schedule_stateid_recovery(server, state);
2432 }
c21443c2
TM		 2433out:
2434 return ret;
2435}
2436
1da177e4 2437/*
24ac23ab 2438 * Returns a referenced nfs4_state
1da177e4 2439 */
82be417a 2440static int _nfs4_do_open(struct inode *dir,
4197a055 2441 struct nfs_open_context *ctx,
82be417a
AA		 2442 int flags,
2443 struct iattr *sattr,
5bc2afc2
TM		 2444 struct nfs4_label *label,
2445 int *opened)
1da177e4
LT		 2446{
2447 struct nfs4_state_owner *sp;
2448 struct nfs4_state *state = NULL;
2449 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2450 struct nfs4_opendata *opendata;
4197a055
TM		 2451 struct dentry *dentry = ctx->dentry;
2452 struct rpc_cred *cred = ctx->cred;
2453 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2454 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2455 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2456 struct nfs4_label *olabel = NULL;
aac00a8d 2457 int status;
1da177e4
LT		 2458
2459 /* Protect against reboot recovery conflicts */
1da177e4 2460 status = -ENOMEM;
d1e284d5
TM		 2461 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2462 if (sp == NULL) {
1da177e4
LT		 2463 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2464 goto out_err;
2465 }
58d9714a
TM		 2466 status = nfs4_recover_expired_lease(server);
2467 if (status != 0)
b4454fe1 2468 goto err_put_state_owner;
2b0143b5
DH		 2469 if (d_really_is_positive(dentry))
2470 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2471 status = -ENOMEM;
2b0143b5 2472 if (d_really_is_positive(dentry))
49f9a0fa 2473 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2474 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2475 label, claim, GFP_KERNEL);
e56e0b78 2476 if (opendata == NULL)
95d35cb4 2477 goto err_put_state_owner;
1da177e4 2478
14c43f76
DQ		 2479 if (label) {
2480 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2481 if (IS_ERR(olabel)) {
2482 status = PTR_ERR(olabel);
2483 goto err_opendata_put;
2484 }
2485 }
2486
e911b815
TM		 2487 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2488 if (!opendata->f_attr.mdsthreshold) {
2489 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2490 if (!opendata->f_attr.mdsthreshold)
2491 goto err_free_label;
2492 }
1549210f 2493 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2494 }
2b0143b5
DH		 2495 if (d_really_is_positive(dentry))
2496 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2497
3efb9722 2498 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2499 if (status != 0)
14c43f76 2500 goto err_free_label;
3efb9722 2501 state = ctx->state;
6168f62c 2502
efcbc04e 2503 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2504 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2505 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2506
2507 nfs_fattr_init(opendata->o_res.f_attr);
2508 status = nfs4_do_setattr(state->inode, cred,
2509 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2510 state, label, olabel);
2511 if (status == 0) {
f044636d
TM		 2512 nfs_setattr_update_inode(state->inode, sattr,
2513 opendata->o_res.f_attr);
aa9c2669 2514 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2515 }
0ab64e0e 2516 }
c5c3fb5f 2517 if (opened && opendata->file_created)
5bc2afc2 2518 *opened |= FILE_CREATED;
82be417a 2519
e911b815 2520 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2521 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2522 opendata->f_attr.mdsthreshold = NULL;
2523 }
82be417a 2524
14c43f76
DQ		 2525 nfs4_label_free(olabel);
2526
c6d00e63 2527 nfs4_opendata_put(opendata);
1da177e4 2528 nfs4_put_state_owner(sp);
1da177e4 2529 return 0;
14c43f76
DQ		 2530err_free_label:
2531 nfs4_label_free(olabel);
c6d00e63
TM		 2532err_opendata_put:
2533 nfs4_opendata_put(opendata);
e56e0b78
TM		 2534err_put_state_owner:
2535 nfs4_put_state_owner(sp);
1da177e4 2536out_err:
1da177e4
LT		 2537 return status;
2538}
2539
2540
82be417a 2541static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2542 struct nfs_open_context *ctx,
82be417a
AA		 2543 int flags,
2544 struct iattr *sattr,
5bc2afc2
TM		 2545 struct nfs4_label *label,
2546 int *opened)
1da177e4 2547{
49f9a0fa 2548 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2549 struct nfs4_exception exception = { };
2550 struct nfs4_state *res;
2551 int status;
2552
2553 do {
5bc2afc2 2554 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2555 res = ctx->state;
42113a75 2556 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2557 if (status == 0)
2558 break;
2559 /* NOTE: BAD_SEQID means the server and client disagree about the
2560 * book-keeping w.r.t. state-changing operations
2561 * (OPEN/CLOSE/LOCK/LOCKU...)
2562 * It is actually a sign of a bug on the client or on the server.
2563 *
2564 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2565 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2566 * have unhashed the old state_owner for us, and that we can
2567 * therefore safely retry using a new one. We should still warn
2568 * the user though...
2569 */
2570 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2571 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2572 " returned a bad sequence-id error!\n",
2573 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2574 exception.retry = 1;
2575 continue;
2576 }
550f5747
TM		 2577 /*
2578 * BAD_STATEID on OPEN means that the server cancelled our
2579 * state before it received the OPEN_CONFIRM.
2580 * Recover by retrying the request as per the discussion
2581 * on Page 181 of RFC3530.
2582 */
2583 if (status == -NFS4ERR_BAD_STATEID) {
2584 exception.retry = 1;
2585 continue;
2586 }
aac00a8d
TM		 2587 if (status == -EAGAIN) {
2588 /* We must have found a delegation */
2589 exception.retry = 1;
2590 continue;
2591 }
49f9a0fa
TM		 2592 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2593 continue;
2594 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2595 status, &exception));
2596 } while (exception.retry);
2597 return res;
2598}
2599
659bfcd6
TM		 2600static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2601 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2602 struct nfs4_state *state, struct nfs4_label *ilabel,
2603 struct nfs4_label *olabel)
1da177e4 2604{
3e4f6290 2605 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2606 struct nfs_setattrargs arg = {
3e4f6290 2607 .fh = NFS_FH(inode),
1da177e4
LT		 2608 .iap = sattr,
2609 .server = server,
2610 .bitmask = server->attr_bitmask,
1775fd3e 2611 .label = ilabel,
1da177e4
LT		 2612 };
2613 struct nfs_setattrres res = {
2614 .fattr = fattr,
1775fd3e 2615 .label = olabel,
1da177e4
LT		 2616 .server = server,
2617 };
2618 struct rpc_message msg = {
659bfcd6
TM		 2619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2620 .rpc_argp = &arg,
2621 .rpc_resp = &res,
2622 .rpc_cred = cred,
1da177e4 2623 };
26e976a8 2624 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2625 fmode_t fmode;
2626 bool truncate;
65e4308d 2627 int status;
1da177e4 2628
aa9c2669
DQ		 2629 arg.bitmask = nfs4_bitmask(server, ilabel);
2630 if (ilabel)
2631 arg.bitmask = nfs4_bitmask(server, olabel);
2632
0e574af1 2633 nfs_fattr_init(fattr);
1da177e4 2634
ee3ae84e
TM		 2635 /* Servers should only apply open mode checks for file size changes */
2636 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2637 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2638
2639 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2640 /* Use that stateid */
0418dae1 2641 } else if (truncate && state != NULL) {
2a369153
TM		 2642 struct nfs_lockowner lockowner = {
2643 .l_owner = current->files,
2644 .l_pid = current->tgid,
2645 };
0418dae1
TM		 2646 if (!nfs4_valid_open_stateid(state))
2647 return -EBADF;
2648 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2649 &lockowner) == -EIO)
2650 return -EBADF;
08e9eac4 2651 } else
f597c537 2652 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2653
7c513058 2654 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2655 if (status == 0 && state != NULL)
2656 renew_lease(server, timestamp);
65e4308d 2657 return status;
1da177e4
LT		 2658}
2659
659bfcd6
TM		 2660static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2661 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2662 struct nfs4_state *state, struct nfs4_label *ilabel,
2663 struct nfs4_label *olabel)
1da177e4 2664{
3e4f6290 2665 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2666 struct nfs4_exception exception = {
2667 .state = state,
3114ea7a 2668 .inode = inode,
a1d0b5ee 2669 };
1da177e4
LT		 2670 int err;
2671 do {
1775fd3e 2672 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2673 trace_nfs4_setattr(inode, err);
451146be
TM		 2674 switch (err) {
2675 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2676 if (!(sattr->ia_valid & ATTR_SIZE)) {
2677 pr_warn_once("NFSv4: server %s is incorrectly "
2678 "applying open mode checks to "
2679 "a SETATTR that is not "
2680 "changing file size.\n",
2681 server->nfs_client->cl_hostname);
2682 }
451146be
TM		 2683 if (state && !(state->state & FMODE_WRITE)) {
2684 err = -EBADF;
2685 if (sattr->ia_valid & ATTR_OPEN)
2686 err = -EACCES;
2687 goto out;
2688 }
2689 }
2690 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2691 } while (exception.retry);
451146be 2692out:
1da177e4
LT		 2693 return err;
2694}
2695
500d701f
PT		 2696static bool
2697nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2698{
2699 if (inode == NULL || !nfs_have_layout(inode))
2700 return false;
2701
2702 return pnfs_wait_on_layoutreturn(inode, task);
2703}
2704
1da177e4
LT		 2705struct nfs4_closedata {
2706 struct inode *inode;
2707 struct nfs4_state *state;
2708 struct nfs_closeargs arg;
2709 struct nfs_closeres res;
516a6af6 2710 struct nfs_fattr fattr;
26e976a8 2711 unsigned long timestamp;
f7e8917a
FI		 2712 bool roc;
2713 u32 roc_barrier;
1da177e4
LT		 2714};
2715
963d8fe5 2716static void nfs4_free_closedata(void *data)
9512135d 2717{
963d8fe5
TM		 2718 struct nfs4_closedata *calldata = data;
2719 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2720 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2721
f7e8917a
FI		 2722 if (calldata->roc)
2723 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2724 nfs4_put_open_state(calldata->state);
2725 nfs_free_seqid(calldata->arg.seqid);
9512135d 2726 nfs4_put_state_owner(sp);
322b2b90 2727 nfs_sb_deactive(sb);
9512135d
TM		 2728 kfree(calldata);
2729}
2730
963d8fe5 2731static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2732{
963d8fe5 2733 struct nfs4_closedata *calldata = data;
1da177e4 2734 struct nfs4_state *state = calldata->state;
1da177e4 2735 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2736 nfs4_stateid *res_stateid = NULL;
1da177e4 2737
a3ca5651 2738 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2739 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2740 return;
42113a75 2741 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2742 /* hmm. we are done with the inode, and in the process of freeing
2743 * the state_owner. we keep this around to process errors
2744 */
1da177e4
LT		 2745 switch (task->tk_status) {
2746 case 0:
412f6c4c 2747 res_stateid = &calldata->res.stateid;
3c13cb5b 2748 if (calldata->roc)
f7e8917a
FI		 2749 pnfs_roc_set_barrier(state->inode,
2750 calldata->roc_barrier);
26e976a8 2751 renew_lease(server, calldata->timestamp);
412f6c4c 2752 break;
69794ad7 2753 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2754 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2755 case -NFS4ERR_OLD_STATEID:
2756 case -NFS4ERR_BAD_STATEID:
1da177e4 2757 case -NFS4ERR_EXPIRED:
566fcec6 2758 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2759 &state->open_stateid)) {
566fcec6
TM		 2760 rpc_restart_call_prepare(task);
2761 goto out_release;
2762 }
dc0b027d 2763 if (calldata->arg.fmode == 0)
9e33bed5 2764 break;
1da177e4 2765 default:
8478eaa1 2766 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2767 rpc_restart_call_prepare(task);
69794ad7
TM		 2768 goto out_release;
2769 }
1da177e4 2770 }
4a1e2feb
TM		 2771 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2772 res_stateid, calldata->arg.fmode);
69794ad7 2773out_release:
72211dbe 2774 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2775 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2776 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2777}
2778
4ce70ada 2779static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2780{
4ce70ada 2781 struct nfs4_closedata *calldata = data;
9512135d 2782 struct nfs4_state *state = calldata->state;
7fdab069 2783 struct inode *inode = calldata->inode;
aee7af35 2784 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2785 int call_close = 0;
9512135d 2786
a3ca5651 2787 dprintk("%s: begin!\n", __func__);
963d8fe5 2788 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2789 goto out_wait;
003707c7 2790
88069f77 2791 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2792 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2793 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2794 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2795 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2796 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2797 /* Calculate the change in open mode */
cd9288ff 2798 calldata->arg.fmode = 0;
e7616923 2799 if (state->n_rdwr == 0) {
cd9288ff
TM		 2800 if (state->n_rdonly == 0)
2801 call_close |= is_rdonly;
2802 else if (is_rdonly)
2803 calldata->arg.fmode |= FMODE_READ;
2804 if (state->n_wronly == 0)
2805 call_close |= is_wronly;
2806 else if (is_wronly)
2807 calldata->arg.fmode |= FMODE_WRITE;
2808 } else if (is_rdwr)
2809 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2810
2811 if (calldata->arg.fmode == 0)
2812 call_close |= is_rdwr;
2813
5d422301
TM		 2814 if (!nfs4_valid_open_stateid(state))
2815 call_close = 0;
4cecb76f 2816 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2817
2818 if (!call_close) {
963d8fe5 2819 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2820 goto out_no_action;
9512135d 2821 }
88069f77 2822
500d701f
PT		 2823 if (nfs4_wait_on_layoutreturn(inode, task)) {
2824 nfs_release_seqid(calldata->arg.seqid);
2825 goto out_wait;
2826 }
2827
3c13cb5b 2828 if (calldata->arg.fmode == 0)
88069f77 2829 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2830 if (calldata->roc)
2831 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2832
6ae37339
TM		 2833 calldata->arg.share_access =
2834 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2835 calldata->arg.fmode, 0);
88069f77 2836
516a6af6 2837 nfs_fattr_init(calldata->res.fattr);
26e976a8 2838 calldata->timestamp = jiffies;
7fdab069 2839 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2840 &calldata->arg.seq_args,
2841 &calldata->res.seq_res,
2240a9e2
TM		 2842 task) != 0)
2843 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2844 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2845 return;
2846out_no_action:
2847 task->tk_action = NULL;
2848out_wait:
2849 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2850}
2851
963d8fe5 2852static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2853 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2854 .rpc_call_done = nfs4_close_done,
2855 .rpc_release = nfs4_free_closedata,
2856};
2857
fe08c546
PT		 2858static bool nfs4_roc(struct inode *inode)
2859{
40dd4b7a 2860 if (!nfs_have_layout(inode))
fe08c546 2861 return false;
fe08c546
PT		 2862 return pnfs_roc(inode);
2863}
2864
1da177e4
LT		 2865/*
2866 * It is possible for data to be read/written from a mem-mapped file
2867 * after the sys_close call (which hits the vfs layer as a flush).
2868 * This means that we can't safely call nfsv4 close on a file until
2869 * the inode is cleared. This in turn means that we are not good
2870 * NFSv4 citizens - we do not indicate to the server to update the file's
2871 * share state even when we are done with one of the three share
2872 * stateid's in the inode.
2873 *
2874 * NOTE: Caller must be holding the sp->so_owner semaphore!
2875 */
1f7977c1 2876int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2877{
4a35bd41 2878 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2879 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2880 struct nfs4_closedata *calldata;
b39e625b
TM		 2881 struct nfs4_state_owner *sp = state->owner;
2882 struct rpc_task *task;
5138fde0
TM		 2883 struct rpc_message msg = {
2884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2885 .rpc_cred = state->owner->so_cred,
2886 };
c970aa85
TM		 2887 struct rpc_task_setup task_setup_data = {
2888 .rpc_client = server->client,
5138fde0 2889 .rpc_message = &msg,
c970aa85 2890 .callback_ops = &nfs4_close_ops,
101070ca 2891 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2892 .flags = RPC_TASK_ASYNC,
2893 };
9512135d 2894 int status = -ENOMEM;
1da177e4 2895
fa940720
WAA		 2896 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2897 &task_setup_data.rpc_client, &msg);
2898
8535b2be 2899 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2900 if (calldata == NULL)
9512135d 2901 goto out;
a9c92d6b 2902 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2903 calldata->inode = state->inode;
1da177e4 2904 calldata->state = state;
4a35bd41 2905 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2906 /* Serialization for the sequence id */
63f5f796
TM		 2907 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2908 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2909 if (IS_ERR(calldata->arg.seqid))
9512135d 2910 goto out_free_calldata;
dc0b027d 2911 calldata->arg.fmode = 0;
a65318bf 2912 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2913 calldata->res.fattr = &calldata->fattr;
c1d51931 2914 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2915 calldata->res.server = server;
fe08c546 2916 calldata->roc = nfs4_roc(state->inode);
643168c2 2917 nfs_sb_active(calldata->inode->i_sb);
9512135d 2918
1174dd1f
TM		 2919 msg.rpc_argp = &calldata->arg;
2920 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2921 task_setup_data.callback_data = calldata;
2922 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2923 if (IS_ERR(task))
2924 return PTR_ERR(task);
a49c3c77
TM		 2925 status = 0;
2926 if (wait)
2927 status = rpc_wait_for_completion_task(task);
b39e625b 2928 rpc_put_task(task);
a49c3c77 2929 return status;
9512135d
TM		 2930out_free_calldata:
2931 kfree(calldata);
2932out:
b39e625b
TM		 2933 nfs4_put_open_state(state);
2934 nfs4_put_state_owner(sp);
9512135d 2935 return status;
1da177e4
LT		 2936}
2937
2b484297 2938static struct inode *
5bc2afc2
TM		 2939nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2940 int open_flags, struct iattr *attr, int *opened)
1da177e4 2941{
1da177e4 2942 struct nfs4_state *state;
aa9c2669
DQ		 2943 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2944
2945 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2946
565277f6 2947 /* Protect against concurrent sillydeletes */
5bc2afc2 2948 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2949
2950 nfs4_label_release_security(label);
2951
f46e0bd3
TM		 2952 if (IS_ERR(state))
2953 return ERR_CAST(state);
275bb307 2954 return state->inode;
1da177e4
LT		 2955}
2956
1185a552 2957static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2958{
2959 if (ctx->state == NULL)
2960 return;
2961 if (is_sync)
643168c2 2962 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2963 else
643168c2 2964 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2965}
1da177e4 2966
b944dba3
TM		 2967#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2968#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2969#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2970
1da177e4
LT		 2971static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2972{
8c61282f 2973 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2974 struct nfs4_server_caps_arg args = {
2975 .fhandle = fhandle,
8c61282f 2976 .bitmask = bitmask,
43652ad5 2977 };
1da177e4
LT		 2978 struct nfs4_server_caps_res res = {};
2979 struct rpc_message msg = {
2980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2981 .rpc_argp = &args,
1da177e4
LT		 2982 .rpc_resp = &res,
2983 };
2984 int status;
2985
8c61282f
KM		 2986 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2987 FATTR4_WORD0_FH_EXPIRE_TYPE |
2988 FATTR4_WORD0_LINK_SUPPORT |
2989 FATTR4_WORD0_SYMLINK_SUPPORT |
2990 FATTR4_WORD0_ACLSUPPORT;
2991 if (minorversion)
2992 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2993
7c513058 2994 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2995 if (status == 0) {
b944dba3 2996 /* Sanity check the server answers */
8c61282f 2997 switch (minorversion) {
b944dba3
TM		 2998 case 0:
2999 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3000 res.attr_bitmask[2] = 0;
3001 break;
3002 case 1:
3003 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3004 break;
3005 case 2:
3006 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3007 }
1da177e4 3008 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3009 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3010 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3011 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3012 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3013 NFS_CAP_CTIME|NFS_CAP_MTIME|
3014 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3015 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3016 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3017 server->caps |= NFS_CAP_ACLS;
3018 if (res.has_links != 0)
3019 server->caps |= NFS_CAP_HARDLINKS;
3020 if (res.has_symlinks != 0)
3021 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3022 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3023 server->caps |= NFS_CAP_FILEID;
3024 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3025 server->caps |= NFS_CAP_MODE;
3026 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3027 server->caps |= NFS_CAP_NLINK;
3028 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3029 server->caps |= NFS_CAP_OWNER;
3030 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3031 server->caps |= NFS_CAP_OWNER_GROUP;
3032 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3033 server->caps |= NFS_CAP_ATIME;
3034 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3035 server->caps |= NFS_CAP_CTIME;
3036 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3037 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3038#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3039 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3040 server->caps |= NFS_CAP_SECURITY_LABEL;
3041#endif
3042 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3043 sizeof(server->attr_bitmask));
b944dba3 3044 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3045
a65318bf
TM		 3046 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3047 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3048 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3049 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3050 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3051 sizeof(server->exclcreat_bitmask));
1da177e4 3052 server->acl_bitmask = res.acl_bitmask;
264e6351 3053 server->fh_expire_type = res.fh_expire_type;
1da177e4 3054 }
cccef3b9 3055
1da177e4
LT		 3056 return status;
3057}
3058
55a97593 3059int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3060{
3061 struct nfs4_exception exception = { };
3062 int err;
3063 do {
3064 err = nfs4_handle_exception(server,
3065 _nfs4_server_capabilities(server, fhandle),
3066 &exception);
3067 } while (exception.retry);
3068 return err;
3069}
3070
3071static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3072 struct nfs_fsinfo *info)
3073{
aa9c2669 3074 u32 bitmask[3];
1da177e4 3075 struct nfs4_lookup_root_arg args = {
aa9c2669 3076 .bitmask = bitmask,
1da177e4
LT		 3077 };
3078 struct nfs4_lookup_res res = {
3079 .server = server,
0e574af1 3080 .fattr = info->fattr,
1da177e4
LT		 3081 .fh = fhandle,
3082 };
3083 struct rpc_message msg = {
3084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3085 .rpc_argp = &args,
3086 .rpc_resp = &res,
3087 };
008f55d0 3088
aa9c2669
DQ		 3089 bitmask[0] = nfs4_fattr_bitmap[0];
3090 bitmask[1] = nfs4_fattr_bitmap[1];
3091 /*
3092 * Process the label in the upcoming getfattr
3093 */
3094 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3095
0e574af1 3096 nfs_fattr_init(info->fattr);
7c513058 3097 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3098}
3099
3100static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3101 struct nfs_fsinfo *info)
3102{
3103 struct nfs4_exception exception = { };
3104 int err;
3105 do {
fb8a5ba8 3106 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3107 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3108 switch (err) {
3109 case 0:
3110 case -NFS4ERR_WRONGSEC:
05e9cfb4 3111 goto out;
fb8a5ba8
BS		 3112 default:
3113 err = nfs4_handle_exception(server, err, &exception);
3114 }
1da177e4 3115 } while (exception.retry);
05e9cfb4 3116out:
1da177e4
LT		 3117 return err;
3118}
3119
8f70e95f
BS		 3120static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3121 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3122{
c2190661
TM		 3123 struct rpc_auth_create_args auth_args = {
3124 .pseudoflavor = flavor,
3125 };
8f70e95f
BS		 3126 struct rpc_auth *auth;
3127 int ret;
3128
c2190661 3129 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3130 if (IS_ERR(auth)) {
75bc8821 3131 ret = -EACCES;
8f70e95f
BS		 3132 goto out;
3133 }
3134 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3135out:
3136 return ret;
3137}
3138
9a744ba3
CL		 3139/*
3140 * Retry pseudoroot lookup with various security flavors. We do this when:
3141 *
3142 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3143 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3144 *
3145 * Returns zero on success, or a negative NFS4ERR value, or a
3146 * negative errno value.
3147 */
801a16dc 3148static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3149 struct nfs_fsinfo *info)
1da177e4 3150{
9a744ba3
CL		 3151 /* Per 3530bis 15.33.5 */
3152 static const rpc_authflavor_t flav_array[] = {
3153 RPC_AUTH_GSS_KRB5P,
3154 RPC_AUTH_GSS_KRB5I,
3155 RPC_AUTH_GSS_KRB5,
c4eafe11 3156 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3157 RPC_AUTH_NULL,
3158 };
3159 int status = -EPERM;
3160 size_t i;
6a1a1e34 3161
4d4b69dd
WAA		 3162 if (server->auth_info.flavor_len > 0) {
3163 /* try each flavor specified by user */
3164 for (i = 0; i < server->auth_info.flavor_len; i++) {
3165 status = nfs4_lookup_root_sec(server, fhandle, info,
3166 server->auth_info.flavors[i]);
3167 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3168 continue;
3169 break;
3170 }
3171 } else {
3172 /* no flavors specified by user, try default list */
3173 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3174 status = nfs4_lookup_root_sec(server, fhandle, info,
3175 flav_array[i]);
3176 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3177 continue;
3178 break;
3179 }
8f70e95f 3180 }
9a744ba3 3181
fb8a5ba8
BS		 3182 /*
3183 * -EACCESS could mean that the user doesn't have correct permissions
3184 * to access the mount. It could also mean that we tried to mount
3185 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3186 * existing mount programs don't handle -EACCES very well so it should
3187 * be mapped to -EPERM instead.
3188 */
3189 if (status == -EACCES)
3190 status = -EPERM;
801a16dc
BS		 3191 return status;
3192}
3193
2ed4b95b
CL		 3194static int nfs4_do_find_root_sec(struct nfs_server *server,
3195 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3196{
3197 int mv = server->nfs_client->cl_minorversion;
3198 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3199}
3200
3201/**
3202 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3203 * @server: initialized nfs_server handle
3204 * @fhandle: we fill in the pseudo-fs root file handle
3205 * @info: we fill in an FSINFO struct
5e6b1990 3206 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3207 *
3208 * Returns zero on success, or a negative errno.
801a16dc 3209 */
3028eb2b 3210int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3211 struct nfs_fsinfo *info,
3212 bool auth_probe)
801a16dc 3213{
c7757074 3214 int status = 0;
2ed4b95b 3215
c7757074 3216 if (!auth_probe)
5e6b1990 3217 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3218
3219 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3220 status = nfs4_do_find_root_sec(server, fhandle, info);
3221
1da177e4
LT		 3222 if (status == 0)
3223 status = nfs4_server_capabilities(server, fhandle);
3224 if (status == 0)
3225 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3226
c12e87f4 3227 return nfs4_map_errors(status);
1da177e4
LT		 3228}
3229
bae36241
BS		 3230static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3231 struct nfs_fsinfo *info)
3232{
3233 int error;
3234 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3235 struct nfs4_label *label = NULL;
bae36241
BS		 3236
3237 error = nfs4_server_capabilities(server, mntfh);
3238 if (error < 0) {
3239 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3240 return error;
3241 }
3242
14c43f76
DQ		 3243 label = nfs4_label_alloc(server, GFP_KERNEL);
3244 if (IS_ERR(label))
3245 return PTR_ERR(label);
3246
1775fd3e 3247 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3248 if (error < 0) {
3249 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3250 goto err_free_label;
bae36241
BS		 3251 }
3252
3253 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3254 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3255 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3256
14c43f76
DQ		 3257err_free_label:
3258 nfs4_label_free(label);
3259
bae36241
BS		 3260 return error;
3261}
3262
6b97fd3d
MN		 3263/*
3264 * Get locations and (maybe) other attributes of a referral.
3265 * Note that we'll actually follow the referral later when
3266 * we detect fsid mismatch in inode revalidation
3267 */
f05d147f
BS		 3268static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3269 const struct qstr *name, struct nfs_fattr *fattr,
3270 struct nfs_fh *fhandle)
6b97fd3d
MN		 3271{
3272 int status = -ENOMEM;
3273 struct page *page = NULL;
3274 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3275
3276 page = alloc_page(GFP_KERNEL);
3277 if (page == NULL)
3278 goto out;
3279 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3280 if (locations == NULL)
3281 goto out;
3282
f05d147f 3283 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3284 if (status != 0)
3285 goto out;
519ae255
CL		 3286
3287 /*
3288 * If the fsid didn't change, this is a migration event, not a
3289 * referral. Cause us to drop into the exception handler, which
3290 * will kick off migration recovery.
3291 */
6b97fd3d 3292 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3293 dprintk("%s: server did not return a different fsid for"
3294 " a referral at %s\n", __func__, name->name);
519ae255 3295 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3296 goto out;
3297 }
533eb461
AA		 3298 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3299 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3300
533eb461 3301 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3302 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3303 memset(fhandle, 0, sizeof(struct nfs_fh));
3304out:
3305 if (page)
3306 __free_page(page);
5d7ca35a 3307 kfree(locations);
6b97fd3d
MN		 3308 return status;
3309}
3310
1775fd3e
DQ		 3311static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3312 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3313{
3314 struct nfs4_getattr_arg args = {
3315 .fh = fhandle,
3316 .bitmask = server->attr_bitmask,
3317 };
3318 struct nfs4_getattr_res res = {
3319 .fattr = fattr,
1775fd3e 3320 .label = label,
1da177e4
LT		 3321 .server = server,
3322 };
3323 struct rpc_message msg = {
3324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3325 .rpc_argp = &args,
3326 .rpc_resp = &res,
3327 };
aa9c2669
DQ		 3328
3329 args.bitmask = nfs4_bitmask(server, label);
3330
0e574af1 3331 nfs_fattr_init(fattr);
7c513058 3332 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3333}
3334
1775fd3e
DQ		 3335static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3336 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3337{
3338 struct nfs4_exception exception = { };
3339 int err;
3340 do {
b5f875a9
TM		 3341 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3342 trace_nfs4_getattr(server, fhandle, fattr, err);
3343 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3344 &exception);
3345 } while (exception.retry);
3346 return err;
3347}
3348
3349/*
3350 * The file is not closed if it is opened due to the a request to change
3351 * the size of the file. The open call will not be needed once the
3352 * VFS layer lookup-intents are implemented.
3353 *
3354 * Close is called when the inode is destroyed.
3355 * If we haven't opened the file for O_WRONLY, we
3356 * need to in the size_change case to obtain a stateid.
3357 *
3358 * Got race?
3359 * Because OPEN is always done by name in nfsv4, it is
3360 * possible that we opened a different file by the same
3361 * name. We can recognize this race condition, but we
3362 * can't do anything about it besides returning an error.
3363 *
3364 * This will be fixed with VFS changes (lookup-intent).
3365 */
3366static int
3367nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3368 struct iattr *sattr)
3369{
2b0143b5 3370 struct inode *inode = d_inode(dentry);
659bfcd6 3371 struct rpc_cred *cred = NULL;
d530838b 3372 struct nfs4_state *state = NULL;
14c43f76 3373 struct nfs4_label *label = NULL;
1da177e4
LT		 3374 int status;
3375
88ac815c
PT		 3376 if (pnfs_ld_layoutret_on_setattr(inode) &&
3377 sattr->ia_valid & ATTR_SIZE &&
3378 sattr->ia_size < i_size_read(inode))
24028672 3379 pnfs_commit_and_return_layout(inode);
8a1636c4 3380
0e574af1 3381 nfs_fattr_init(fattr);
1da177e4 3382
2669940d
AA		 3383 /* Deal with open(O_TRUNC) */
3384 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3385 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3386
3387 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3388 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3389 return 0;
3390
d530838b 3391 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3392 if (sattr->ia_valid & ATTR_FILE) {
3393 struct nfs_open_context *ctx;
3394
3395 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3396 if (ctx) {
3397 cred = ctx->cred;
3398 state = ctx->state;
3399 }
659bfcd6 3400 }
08e9eac4 3401
14c43f76
DQ		 3402 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3403 if (IS_ERR(label))
3404 return PTR_ERR(label);
3405
3406 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3407 if (status == 0) {
f044636d 3408 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3409 nfs_setsecurity(inode, fattr, label);
3410 }
14c43f76 3411 nfs4_label_free(label);
1da177e4
LT		 3412 return status;
3413}
3414
0c2e53f1
TM		 3415static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3416 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3417 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3418{
0c2e53f1 3419 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3420 int status;
3421 struct nfs4_lookup_arg args = {
3422 .bitmask = server->attr_bitmask,
0c2e53f1 3423 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3424 .name = name,
3425 };
3426 struct nfs4_lookup_res res = {
3427 .server = server,
3428 .fattr = fattr,
aa9c2669 3429 .label = label,
2b3de441
DH		 3430 .fh = fhandle,
3431 };
3432 struct rpc_message msg = {
3433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3434 .rpc_argp = &args,
3435 .rpc_resp = &res,
3436 };
3437
aa9c2669
DQ		 3438 args.bitmask = nfs4_bitmask(server, label);
3439
2b3de441
DH		 3440 nfs_fattr_init(fattr);
3441
1da177e4 3442 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3443 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3444 dprintk("NFS reply lookup: %d\n", status);
3445 return status;
3446}
3447
72de53ec 3448static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3449{
7ebb9315 3450 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3451 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3452 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3453 fattr->nlink = 2;
3454}
3455
72de53ec
BS		 3456static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3457 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3458 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3459{
3460 struct nfs4_exception exception = { };
72de53ec 3461 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3462 int err;
3463 do {
1775fd3e 3464 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3465 trace_nfs4_lookup(dir, name, err);
72de53ec 3466 switch (err) {
08ef7bd3 3467 case -NFS4ERR_BADNAME:
72de53ec
BS		 3468 err = -ENOENT;
3469 goto out;
0c2e53f1 3470 case -NFS4ERR_MOVED:
f05d147f 3471 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3472 if (err == -NFS4ERR_MOVED)
3473 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3474 goto out;
0c2e53f1 3475 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3476 err = -EPERM;
3477 if (client != *clnt)
3478 goto out;
66b06860 3479 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3480 if (IS_ERR(client))
3481 return PTR_ERR(client);
3482
3483 exception.retry = 1;
3484 break;
3485 default:
3486 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3487 }
1da177e4 3488 } while (exception.retry);
72de53ec
BS		 3489
3490out:
3491 if (err == 0)
3492 *clnt = client;
3493 else if (client != *clnt)
3494 rpc_shutdown_client(client);
3495
1da177e4
LT		 3496 return err;
3497}
3498
80a16b21 3499static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3500 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3501 struct nfs4_label *label)
72de53ec
BS		 3502{
3503 int status;
3504 struct rpc_clnt *client = NFS_CLIENT(dir);
3505
1775fd3e 3506 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3507 if (client != NFS_CLIENT(dir)) {
3508 rpc_shutdown_client(client);
3509 nfs_fixup_secinfo_attributes(fattr);
3510 }
3511 return status;
3512}
3513
f05d147f
BS		 3514struct rpc_clnt *
3515nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3516 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3517{
b72888cb 3518 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3519 int status;
f05d147f 3520
1775fd3e 3521 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3522 if (status < 0)
f05d147f 3523 return ERR_PTR(status);
b72888cb 3524 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3525}
3526
1da177e4
LT		 3527static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3528{
76b32999 3529 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3530 struct nfs4_accessargs args = {
3531 .fh = NFS_FH(inode),
a4980e78 3532 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3533 };
3534 struct nfs4_accessres res = {
3535 .server = server,
1da177e4 3536 };
1da177e4
LT		 3537 struct rpc_message msg = {
3538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3539 .rpc_argp = &args,
3540 .rpc_resp = &res,
3541 .rpc_cred = entry->cred,
3542 };
3543 int mode = entry->mask;
aa9c2669 3544 int status = 0;
1da177e4
LT		 3545
3546 /*
3547 * Determine which access bits we want to ask for...
3548 */
3549 if (mode & MAY_READ)
3550 args.access |= NFS4_ACCESS_READ;
3551 if (S_ISDIR(inode->i_mode)) {
3552 if (mode & MAY_WRITE)
3553 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3554 if (mode & MAY_EXEC)
3555 args.access |= NFS4_ACCESS_LOOKUP;
3556 } else {
3557 if (mode & MAY_WRITE)
3558 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3559 if (mode & MAY_EXEC)
3560 args.access |= NFS4_ACCESS_EXECUTE;
3561 }
c407d41a
TM		 3562
3563 res.fattr = nfs_alloc_fattr();
3564 if (res.fattr == NULL)
3565 return -ENOMEM;
3566
7c513058 3567 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3568 if (!status) {
6168f62c 3569 nfs_access_set_mask(entry, res.access);
c407d41a 3570 nfs_refresh_inode(inode, res.fattr);
1da177e4 3571 }
c407d41a 3572 nfs_free_fattr(res.fattr);
1da177e4
LT		 3573 return status;
3574}
3575
3576static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3577{
3578 struct nfs4_exception exception = { };
3579 int err;
3580 do {
c1578b76
TM		 3581 err = _nfs4_proc_access(inode, entry);
3582 trace_nfs4_access(inode, err);
3583 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3584 &exception);
3585 } while (exception.retry);
3586 return err;
3587}
3588
3589/*
3590 * TODO: For the time being, we don't try to get any attributes
3591 * along with any of the zero-copy operations READ, READDIR,
3592 * READLINK, WRITE.
3593 *
3594 * In the case of the first three, we want to put the GETATTR
3595 * after the read-type operation -- this is because it is hard
3596 * to predict the length of a GETATTR response in v4, and thus
3597 * align the READ data correctly. This means that the GETATTR
3598 * may end up partially falling into the page cache, and we should
3599 * shift it into the 'tail' of the xdr_buf before processing.
3600 * To do this efficiently, we need to know the total length
3601 * of data received, which doesn't seem to be available outside
3602 * of the RPC layer.
3603 *
3604 * In the case of WRITE, we also want to put the GETATTR after
3605 * the operation -- in this case because we want to make sure
140150db 3606 * we get the post-operation mtime and size.
1da177e4
LT		 3607 *
3608 * Both of these changes to the XDR layer would in fact be quite
3609 * minor, but I decided to leave them for a subsequent patch.
3610 */
3611static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3612 unsigned int pgbase, unsigned int pglen)
3613{
3614 struct nfs4_readlink args = {
3615 .fh = NFS_FH(inode),
3616 .pgbase = pgbase,
3617 .pglen = pglen,
3618 .pages = &page,
3619 };
f50c7000 3620 struct nfs4_readlink_res res;
1da177e4
LT		 3621 struct rpc_message msg = {
3622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3623 .rpc_argp = &args,
f50c7000 3624 .rpc_resp = &res,
1da177e4
LT		 3625 };
3626
7c513058 3627 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3628}
3629
3630static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3631 unsigned int pgbase, unsigned int pglen)
3632{
3633 struct nfs4_exception exception = { };
3634 int err;
3635 do {
c1578b76
TM		 3636 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3637 trace_nfs4_readlink(inode, err);
3638 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3639 &exception);
3640 } while (exception.retry);
3641 return err;
3642}
3643
1da177e4 3644/*
8867fe58 3645 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3646 */
1da177e4
LT		 3647static int
3648nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3649 int flags)
1da177e4 3650{
aa9c2669 3651 struct nfs4_label l, *ilabel = NULL;
8867fe58 3652 struct nfs_open_context *ctx;
1da177e4 3653 struct nfs4_state *state;
1da177e4
LT		 3654 int status = 0;
3655
8867fe58
MS		 3656 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3657 if (IS_ERR(ctx))
3658 return PTR_ERR(ctx);
3659
aa9c2669
DQ		 3660 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3661
a8a5da99 3662 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3663 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3664 if (IS_ERR(state)) {
3665 status = PTR_ERR(state);
c0204fd2 3666 goto out;
1da177e4 3667 }
1da177e4 3668out:
aa9c2669 3669 nfs4_label_release_security(ilabel);
8867fe58 3670 put_nfs_open_context(ctx);
1da177e4
LT		 3671 return status;
3672}
3673
3674static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3675{
16e42959 3676 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3677 struct nfs_removeargs args = {
1da177e4 3678 .fh = NFS_FH(dir),
26fe5750 3679 .name = *name,
16e42959 3680 };
4fdc17b2 3681 struct nfs_removeres res = {
16e42959 3682 .server = server,
1da177e4 3683 };
1da177e4 3684 struct rpc_message msg = {
4fdc17b2
TM		 3685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3686 .rpc_argp = &args,
3687 .rpc_resp = &res,
1da177e4 3688 };
778d2817 3689 int status;
1da177e4 3690
7c513058 3691 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3692 if (status == 0)
16e42959 3693 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3694 return status;
3695}
3696
3697static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3698{
3699 struct nfs4_exception exception = { };
3700 int err;
3701 do {
078ea3df
TM		 3702 err = _nfs4_proc_remove(dir, name);
3703 trace_nfs4_remove(dir, name, err);
3704 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3705 &exception);
3706 } while (exception.retry);
3707 return err;
3708}
3709
e4eff1a6 3710static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3711{
e4eff1a6
TM		 3712 struct nfs_server *server = NFS_SERVER(dir);
3713 struct nfs_removeargs *args = msg->rpc_argp;
3714 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3715
e4eff1a6 3716 res->server = server;
1da177e4 3717 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3718 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3719
3720 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3721}
3722
34e137cc
BS		 3723static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3724{
d9afbd1b
TM		 3725 nfs4_setup_sequence(NFS_SERVER(data->dir),
3726 &data->args.seq_args,
3727 &data->res.seq_res,
3728 task);
1da177e4
LT		 3729}
3730
e4eff1a6 3731static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3732{
078ea3df
TM		 3733 struct nfs_unlinkdata *data = task->tk_calldata;
3734 struct nfs_removeres *res = &data->res;
e4eff1a6 3735
14516c3a
TM		 3736 if (!nfs4_sequence_done(task, &res->seq_res))
3737 return 0;
8478eaa1
N		 3738 if (nfs4_async_handle_error(task, res->server, NULL,
3739 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3740 return 0;
3741 update_changeattr(dir, &res->cinfo);
e4eff1a6 3742 return 1;
1da177e4
LT		 3743}
3744
d3d4152a
JL		 3745static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3746{
3747 struct nfs_server *server = NFS_SERVER(dir);
3748 struct nfs_renameargs *arg = msg->rpc_argp;
3749 struct nfs_renameres *res = msg->rpc_resp;
3750
3751 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3752 res->server = server;
a9c92d6b 3753 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3754}
3755
c6bfa1a1
BS		 3756static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3757{
d9afbd1b
TM		 3758 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3759 &data->args.seq_args,
3760 &data->res.seq_res,
3761 task);
d3d4152a
JL		 3762}
3763
3764static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3765 struct inode *new_dir)
3766{
fbc6f7c2
TM		 3767 struct nfs_renamedata *data = task->tk_calldata;
3768 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3769
3770 if (!nfs4_sequence_done(task, &res->seq_res))
3771 return 0;
8478eaa1 3772 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3773 return 0;
3774
3775 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3776 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3777 return 1;
3778}
3779
1da177e4
LT		 3780static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3781{
91ba2eee 3782 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3783 struct nfs4_link_arg arg = {
3784 .fh = NFS_FH(inode),
3785 .dir_fh = NFS_FH(dir),
3786 .name = name,
91ba2eee
TM		 3787 .bitmask = server->attr_bitmask,
3788 };
91ba2eee
TM		 3789 struct nfs4_link_res res = {
3790 .server = server,
1775fd3e 3791 .label = NULL,
1da177e4 3792 };
1da177e4
LT		 3793 struct rpc_message msg = {
3794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3795 .rpc_argp = &arg,
91ba2eee 3796 .rpc_resp = &res,
1da177e4 3797 };
136f2627
TM		 3798 int status = -ENOMEM;
3799
3800 res.fattr = nfs_alloc_fattr();
778d2817 3801 if (res.fattr == NULL)
136f2627 3802 goto out;
1da177e4 3803
14c43f76
DQ		 3804 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3805 if (IS_ERR(res.label)) {
3806 status = PTR_ERR(res.label);
3807 goto out;
3808 }
aa9c2669 3809 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3810
7c513058 3811 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3812 if (!status) {
3813 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3814 status = nfs_post_op_update_inode(inode, res.fattr);
3815 if (!status)
3816 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3817 }
14c43f76
DQ		 3818
3819
3820 nfs4_label_free(res.label);
3821
136f2627 3822out:
136f2627 3823 nfs_free_fattr(res.fattr);
1da177e4
LT		 3824 return status;
3825}
3826
3827static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3828{
3829 struct nfs4_exception exception = { };
3830 int err;
3831 do {
3832 err = nfs4_handle_exception(NFS_SERVER(inode),
3833 _nfs4_proc_link(inode, dir, name),
3834 &exception);
3835 } while (exception.retry);
3836 return err;
3837}
3838
57dc9a57
TM		 3839struct nfs4_createdata {
3840 struct rpc_message msg;
3841 struct nfs4_create_arg arg;
3842 struct nfs4_create_res res;
3843 struct nfs_fh fh;
3844 struct nfs_fattr fattr;
1775fd3e 3845 struct nfs4_label *label;
57dc9a57
TM		 3846};
3847
3848static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3849 struct qstr *name, struct iattr *sattr, u32 ftype)
3850{
3851 struct nfs4_createdata *data;
3852
3853 data = kzalloc(sizeof(*data), GFP_KERNEL);
3854 if (data != NULL) {
3855 struct nfs_server *server = NFS_SERVER(dir);
3856
14c43f76
DQ		 3857 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3858 if (IS_ERR(data->label))
3859 goto out_free;
3860
57dc9a57
TM		 3861 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3862 data->msg.rpc_argp = &data->arg;
3863 data->msg.rpc_resp = &data->res;
3864 data->arg.dir_fh = NFS_FH(dir);
3865 data->arg.server = server;
3866 data->arg.name = name;
3867 data->arg.attrs = sattr;
3868 data->arg.ftype = ftype;
aa9c2669 3869 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3870 data->res.server = server;
3871 data->res.fh = &data->fh;
3872 data->res.fattr = &data->fattr;
1775fd3e 3873 data->res.label = data->label;
57dc9a57 3874 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3875 }
3876 return data;
14c43f76
DQ		 3877out_free:
3878 kfree(data);
3879 return NULL;
57dc9a57
TM		 3880}
3881
3882static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3883{
7c513058 3884 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3885 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3886 if (status == 0) {
3887 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3888 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3889 }
3890 return status;
3891}
3892
3893static void nfs4_free_createdata(struct nfs4_createdata *data)
3894{
14c43f76 3895 nfs4_label_free(data->label);
57dc9a57
TM		 3896 kfree(data);
3897}
3898
4f390c15 3899static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3900 struct page *page, unsigned int len, struct iattr *sattr,
3901 struct nfs4_label *label)
1da177e4 3902{
57dc9a57
TM		 3903 struct nfs4_createdata *data;
3904 int status = -ENAMETOOLONG;
1da177e4 3905
94a6d753 3906 if (len > NFS4_MAXPATHLEN)
57dc9a57 3907 goto out;
4f390c15 3908
57dc9a57
TM		 3909 status = -ENOMEM;
3910 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3911 if (data == NULL)
3912 goto out;
3913
3914 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3915 data->arg.u.symlink.pages = &page;
3916 data->arg.u.symlink.len = len;
1775fd3e 3917 data->arg.label = label;
1da177e4 3918
57dc9a57
TM		 3919 status = nfs4_do_create(dir, dentry, data);
3920
3921 nfs4_free_createdata(data);
3922out:
1da177e4
LT		 3923 return status;
3924}
3925
4f390c15 3926static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3927 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3928{
3929 struct nfs4_exception exception = { };
aa9c2669 3930 struct nfs4_label l, *label = NULL;
1da177e4 3931 int err;
aa9c2669
DQ		 3932
3933 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3934
1da177e4 3935 do {
078ea3df
TM		 3936 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3937 trace_nfs4_symlink(dir, &dentry->d_name, err);
3938 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3939 &exception);
3940 } while (exception.retry);
aa9c2669
DQ		 3941
3942 nfs4_label_release_security(label);
1da177e4
LT		 3943 return err;
3944}
3945
3946static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3947 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3948{
57dc9a57
TM		 3949 struct nfs4_createdata *data;
3950 int status = -ENOMEM;
1da177e4 3951
57dc9a57
TM		 3952 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3953 if (data == NULL)
3954 goto out;
3955
1775fd3e 3956 data->arg.label = label;
57dc9a57
TM		 3957 status = nfs4_do_create(dir, dentry, data);
3958
3959 nfs4_free_createdata(data);
3960out:
1da177e4
LT		 3961 return status;
3962}
3963
3964static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3965 struct iattr *sattr)
3966{
3967 struct nfs4_exception exception = { };
aa9c2669 3968 struct nfs4_label l, *label = NULL;
1da177e4 3969 int err;
a8a5da99 3970
aa9c2669
DQ		 3971 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3972
a8a5da99 3973 sattr->ia_mode &= ~current_umask();
1da177e4 3974 do {
078ea3df
TM		 3975 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3976 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3977 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3978 &exception);
3979 } while (exception.retry);
aa9c2669
DQ		 3980 nfs4_label_release_security(label);
3981
1da177e4
LT		 3982 return err;
3983}
3984
3985static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3986 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3987{
2b0143b5 3988 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3989 struct nfs4_readdir_arg args = {
3990 .fh = NFS_FH(dir),
56e4ebf8 3991 .pages = pages,
1da177e4
LT		 3992 .pgbase = 0,
3993 .count = count,
2b0143b5 3994 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3995 .plus = plus,
1da177e4
LT		 3996 };
3997 struct nfs4_readdir_res res;
3998 struct rpc_message msg = {
3999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4000 .rpc_argp = &args,
4001 .rpc_resp = &res,
4002 .rpc_cred = cred,
4003 };
4004 int status;
4005
6de1472f
AV		 4006 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4007 dentry,
eadf4598 4008 (unsigned long long)cookie);
c3f52af3 4009 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4010 res.pgbase = args.pgbase;
7c513058 4011 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4012 if (status >= 0) {
c3f52af3 4013 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4014 status += args.pgbase;
4015 }
c4812998
TM		 4016
4017 nfs_invalidate_atime(dir);
4018
3110ff80 4019 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4020 return status;
4021}
4022
4023static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4024 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4025{
4026 struct nfs4_exception exception = { };
4027 int err;
4028 do {
c1578b76
TM		 4029 err = _nfs4_proc_readdir(dentry, cred, cookie,
4030 pages, count, plus);
2b0143b5
DH		 4031 trace_nfs4_readdir(d_inode(dentry), err);
4032 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4033 &exception);
4034 } while (exception.retry);
4035 return err;
4036}
4037
4038static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4039 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4040{
57dc9a57
TM		 4041 struct nfs4_createdata *data;
4042 int mode = sattr->ia_mode;
4043 int status = -ENOMEM;
1da177e4 4044
57dc9a57
TM		 4045 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4046 if (data == NULL)
4047 goto out;
4048
1da177e4 4049 if (S_ISFIFO(mode))
57dc9a57 4050 data->arg.ftype = NF4FIFO;
1da177e4 4051 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4052 data->arg.ftype = NF4BLK;
4053 data->arg.u.device.specdata1 = MAJOR(rdev);
4054 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4055 }
4056 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4057 data->arg.ftype = NF4CHR;
4058 data->arg.u.device.specdata1 = MAJOR(rdev);
4059 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4060 } else if (!S_ISSOCK(mode)) {
4061 status = -EINVAL;
4062 goto out_free;
1da177e4 4063 }
1775fd3e 4064
aa9c2669 4065 data->arg.label = label;
57dc9a57 4066 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4067out_free:
57dc9a57
TM		 4068 nfs4_free_createdata(data);
4069out:
1da177e4
LT		 4070 return status;
4071}
4072
4073static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4074 struct iattr *sattr, dev_t rdev)
4075{
4076 struct nfs4_exception exception = { };
aa9c2669 4077 struct nfs4_label l, *label = NULL;
1da177e4 4078 int err;
a8a5da99 4079
aa9c2669
DQ		 4080 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4081
a8a5da99 4082 sattr->ia_mode &= ~current_umask();
1da177e4 4083 do {
078ea3df
TM		 4084 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4085 trace_nfs4_mknod(dir, &dentry->d_name, err);
4086 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4087 &exception);
4088 } while (exception.retry);
aa9c2669
DQ		 4089
4090 nfs4_label_release_security(label);
4091
1da177e4
LT		 4092 return err;
4093}
4094
4095static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4096 struct nfs_fsstat *fsstat)
4097{
4098 struct nfs4_statfs_arg args = {
4099 .fh = fhandle,
4100 .bitmask = server->attr_bitmask,
4101 };
24ad148a
BH		 4102 struct nfs4_statfs_res res = {
4103 .fsstat = fsstat,
4104 };
1da177e4
LT		 4105 struct rpc_message msg = {
4106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4107 .rpc_argp = &args,
24ad148a 4108 .rpc_resp = &res,
1da177e4
LT		 4109 };
4110
0e574af1 4111 nfs_fattr_init(fsstat->fattr);
7c513058 4112 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4113}
4114
4115static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4116{
4117 struct nfs4_exception exception = { };
4118 int err;
4119 do {
4120 err = nfs4_handle_exception(server,
4121 _nfs4_proc_statfs(server, fhandle, fsstat),
4122 &exception);
4123 } while (exception.retry);
4124 return err;
4125}
4126
4127static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4128 struct nfs_fsinfo *fsinfo)
4129{
4130 struct nfs4_fsinfo_arg args = {
4131 .fh = fhandle,
4132 .bitmask = server->attr_bitmask,
4133 };
3dda5e43
BH		 4134 struct nfs4_fsinfo_res res = {
4135 .fsinfo = fsinfo,
4136 };
1da177e4
LT		 4137 struct rpc_message msg = {
4138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4139 .rpc_argp = &args,
3dda5e43 4140 .rpc_resp = &res,
1da177e4
LT		 4141 };
4142
7c513058 4143 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4144}
4145
4146static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4147{
4148 struct nfs4_exception exception = { };
83ca7f5a 4149 unsigned long now = jiffies;
1da177e4
LT		 4150 int err;
4151
4152 do {
83ca7f5a 4153 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4154 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4155 if (err == 0) {
4156 struct nfs_client *clp = server->nfs_client;
4157
4158 spin_lock(&clp->cl_lock);
4159 clp->cl_lease_time = fsinfo->lease_time * HZ;
4160 clp->cl_last_renewal = now;
4161 spin_unlock(&clp->cl_lock);
4162 break;
4163 }
4164 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4165 } while (exception.retry);
4166 return err;
4167}
4168
4169static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4170{
e38eb650
BS		 4171 int error;
4172
0e574af1 4173 nfs_fattr_init(fsinfo->fattr);
e38eb650 4174 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4175 if (error == 0) {
4176 /* block layout checks this! */
4177 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4178 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4179 }
e38eb650
BS		 4180
4181 return error;
1da177e4
LT		 4182}
4183
4184static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4185 struct nfs_pathconf *pathconf)
4186{
4187 struct nfs4_pathconf_arg args = {
4188 .fh = fhandle,
4189 .bitmask = server->attr_bitmask,
4190 };
d45b2989
BH		 4191 struct nfs4_pathconf_res res = {
4192 .pathconf = pathconf,
4193 };
1da177e4
LT		 4194 struct rpc_message msg = {
4195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4196 .rpc_argp = &args,
d45b2989 4197 .rpc_resp = &res,
1da177e4
LT		 4198 };
4199
4200 /* None of the pathconf attributes are mandatory to implement */
4201 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4202 memset(pathconf, 0, sizeof(*pathconf));
4203 return 0;
4204 }
4205
0e574af1 4206 nfs_fattr_init(pathconf->fattr);
7c513058 4207 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4208}
4209
4210static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4211 struct nfs_pathconf *pathconf)
4212{
4213 struct nfs4_exception exception = { };
4214 int err;
4215
4216 do {
4217 err = nfs4_handle_exception(server,
4218 _nfs4_proc_pathconf(server, fhandle, pathconf),
4219 &exception);
4220 } while (exception.retry);
4221 return err;
4222}
4223
5521abfd 4224int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4225 const struct nfs_open_context *ctx,
4226 const struct nfs_lock_context *l_ctx,
4227 fmode_t fmode)
4228{
4229 const struct nfs_lockowner *lockowner = NULL;
4230
4231 if (l_ctx != NULL)
4232 lockowner = &l_ctx->lockowner;
5521abfd 4233 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4234}
4235EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4236
5521abfd
TM		 4237static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4238 const struct nfs_open_context *ctx,
4239 const struct nfs_lock_context *l_ctx,
4240 fmode_t fmode)
4241{
4242 nfs4_stateid current_stateid;
4243
e1253be0
TM		 4244 /* If the current stateid represents a lost lock, then exit */
4245 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4246 return true;
5521abfd
TM		 4247 return nfs4_stateid_match(stateid, &current_stateid);
4248}
4249
4250static bool nfs4_error_stateid_expired(int err)
4251{
4252 switch (err) {
4253 case -NFS4ERR_DELEG_REVOKED:
4254 case -NFS4ERR_ADMIN_REVOKED:
4255 case -NFS4ERR_BAD_STATEID:
4256 case -NFS4ERR_STALE_STATEID:
4257 case -NFS4ERR_OLD_STATEID:
4258 case -NFS4ERR_OPENMODE:
4259 case -NFS4ERR_EXPIRED:
4260 return true;
4261 }
4262 return false;
4263}
4264
d45f60c6 4265void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4266{
d45f60c6 4267 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4268}
4269
d45f60c6 4270static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4271{
d45f60c6 4272 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4273
d45f60c6
WAA		 4274 trace_nfs4_read(hdr, task->tk_status);
4275 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4276 hdr->args.context->state,
4277 NULL) == -EAGAIN) {
d00c5d43 4278 rpc_restart_call_prepare(task);
ec06c096 4279 return -EAGAIN;
1da177e4 4280 }
8850df99 4281
d45f60c6 4282 __nfs4_read_done_cb(hdr);
1da177e4 4283 if (task->tk_status > 0)
d45f60c6 4284 renew_lease(server, hdr->timestamp);
ec06c096 4285 return 0;
1da177e4
LT		 4286}
4287
5521abfd 4288static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4289 struct nfs_pgio_args *args)
5521abfd
TM		 4290{
4291
4292 if (!nfs4_error_stateid_expired(task->tk_status) ||
4293 nfs4_stateid_is_current(&args->stateid,
4294 args->context,
4295 args->lock_context,
4296 FMODE_READ))
4297 return false;
4298 rpc_restart_call_prepare(task);
4299 return true;
4300}
4301
d45f60c6 4302static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4303{
4304
4305 dprintk("--> %s\n", __func__);
4306
d45f60c6 4307 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4308 return -EAGAIN;
d45f60c6 4309 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4310 return -EAGAIN;
d45f60c6
WAA		 4311 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4312 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4313}
4314
d45f60c6
WAA		 4315static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4316 struct rpc_message *msg)
1da177e4 4317{
d45f60c6
WAA		 4318 hdr->timestamp = jiffies;
4319 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4320 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4321 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4322}
4323
d45f60c6
WAA		 4324static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4325 struct nfs_pgio_header *hdr)
ea7c3303 4326{
d45f60c6
WAA		 4327 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4328 &hdr->args.seq_args,
4329 &hdr->res.seq_res,
9b206149 4330 task))
ef1820f9 4331 return 0;
d45f60c6
WAA		 4332 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4333 hdr->args.lock_context,
4334 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4335 return -EIO;
d45f60c6 4336 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4337 return -EIO;
4338 return 0;
1da177e4
LT		 4339}
4340
d45f60c6
WAA		 4341static int nfs4_write_done_cb(struct rpc_task *task,
4342 struct nfs_pgio_header *hdr)
1da177e4 4343{
d45f60c6 4344 struct inode *inode = hdr->inode;
8478eaa1 4345
d45f60c6
WAA		 4346 trace_nfs4_write(hdr, task->tk_status);
4347 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4348 hdr->args.context->state,
4349 NULL) == -EAGAIN) {
d00c5d43 4350 rpc_restart_call_prepare(task);
788e7a89 4351 return -EAGAIN;
1da177e4 4352 }
4f9838c7 4353 if (task->tk_status >= 0) {
d45f60c6 4354 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4355 nfs_writeback_update_inode(hdr);
4f9838c7 4356 }
788e7a89 4357 return 0;
1da177e4
LT		 4358}
4359
5521abfd 4360static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4361 struct nfs_pgio_args *args)
5521abfd
TM		 4362{
4363
4364 if (!nfs4_error_stateid_expired(task->tk_status) ||
4365 nfs4_stateid_is_current(&args->stateid,
4366 args->context,
4367 args->lock_context,
4368 FMODE_WRITE))
4369 return false;
4370 rpc_restart_call_prepare(task);
4371 return true;
4372}
4373
d45f60c6 4374static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4375{
d45f60c6 4376 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4377 return -EAGAIN;
d45f60c6 4378 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4379 return -EAGAIN;
d45f60c6
WAA		 4380 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4381 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4382}
4383
5a37f851 4384static
d45f60c6 4385bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4386{
5a37f851 4387 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4388 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4389 return false;
4390 /* Otherwise, request attributes if and only if we don't hold
4391 * a delegation
4392 */
011e2a7f 4393 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4394}
a69aef14 4395
d45f60c6
WAA		 4396static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4397 struct rpc_message *msg)
1da177e4 4398{
d45f60c6 4399 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4400
d45f60c6
WAA		 4401 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4402 hdr->args.bitmask = NULL;
4403 hdr->res.fattr = NULL;
7ffd1064 4404 } else
d45f60c6 4405 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4406
d45f60c6
WAA		 4407 if (!hdr->pgio_done_cb)
4408 hdr->pgio_done_cb = nfs4_write_done_cb;
4409 hdr->res.server = server;
4410 hdr->timestamp = jiffies;
1da177e4 4411
bdc7f021 4412 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4413 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4414}
4415
0b7c0153 4416static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4417{
d9afbd1b
TM		 4418 nfs4_setup_sequence(NFS_SERVER(data->inode),
4419 &data->args.seq_args,
4420 &data->res.seq_res,
4421 task);
1da177e4
LT		 4422}
4423
0b7c0153 4424static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4425{
1da177e4 4426 struct inode *inode = data->inode;
14516c3a 4427
cc668ab3 4428 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4429 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4430 NULL, NULL) == -EAGAIN) {
d00c5d43 4431 rpc_restart_call_prepare(task);
788e7a89 4432 return -EAGAIN;
1da177e4 4433 }
788e7a89 4434 return 0;
1da177e4
LT		 4435}
4436
0b7c0153 4437static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4438{
4439 if (!nfs4_sequence_done(task, &data->res.seq_res))
4440 return -EAGAIN;
0b7c0153 4441 return data->commit_done_cb(task, data);
5f452431
FI		 4442}
4443
0b7c0153 4444static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4445{
788e7a89 4446 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4447
0b7c0153
FI		 4448 if (data->commit_done_cb == NULL)
4449 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4450 data->res.server = server;
bdc7f021 4451 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4452 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4453}
4454
9bc4e3ca
CL		 4455struct nfs4_renewdata {
4456 struct nfs_client *client;
4457 unsigned long timestamp;
4458};
4459
1da177e4
LT		 4460/*
4461 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4462 * standalone procedure for queueing an asynchronous RENEW.
4463 */
9bc4e3ca 4464static void nfs4_renew_release(void *calldata)
dc96aef9 4465{
9bc4e3ca
CL		 4466 struct nfs4_renewdata *data = calldata;
4467 struct nfs_client *clp = data->client;
dc96aef9 4468
0851de06
AB		 4469 if (atomic_read(&clp->cl_count) > 1)
4470 nfs4_schedule_state_renewal(clp);
4471 nfs_put_client(clp);
9bc4e3ca 4472 kfree(data);
dc96aef9
AB		 4473}
4474
9bc4e3ca 4475static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4476{
9bc4e3ca
CL		 4477 struct nfs4_renewdata *data = calldata;
4478 struct nfs_client *clp = data->client;
4479 unsigned long timestamp = data->timestamp;
1da177e4 4480
c6d01c6f 4481 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4482 switch (task->tk_status) {
4483 case 0:
4484 break;
4485 case -NFS4ERR_LEASE_MOVED:
4486 nfs4_schedule_lease_moved_recovery(clp);
4487 break;
4488 default:
95baa25c 4489 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4490 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4491 return;
4492 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4493 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4494 return;
4495 }
4496 nfs4_schedule_path_down_recovery(clp);
1da177e4 4497 }
452e9352 4498 do_renew_lease(clp, timestamp);
1da177e4
LT		 4499}
4500
963d8fe5
TM		 4501static const struct rpc_call_ops nfs4_renew_ops = {
4502 .rpc_call_done = nfs4_renew_done,
dc96aef9 4503 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4504};
4505
2f60ea6b 4506static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4507{
4508 struct rpc_message msg = {
4509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4510 .rpc_argp = clp,
b4454fe1 4511 .rpc_cred = cred,
1da177e4 4512 };
9bc4e3ca 4513 struct nfs4_renewdata *data;
1da177e4 4514
2f60ea6b
TM		 4515 if (renew_flags == 0)
4516 return 0;
0851de06
AB		 4517 if (!atomic_inc_not_zero(&clp->cl_count))
4518 return -EIO;
b569ad34 4519 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4520 if (data == NULL)
4521 return -ENOMEM;
4522 data->client = clp;
4523 data->timestamp = jiffies;
bc7a05ca 4524 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4525 &nfs4_renew_ops, data);
1da177e4
LT		 4526}
4527
8534d4ec 4528static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4529{
4530 struct rpc_message msg = {
4531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4532 .rpc_argp = clp,
b4454fe1 4533 .rpc_cred = cred,
1da177e4
LT		 4534 };
4535 unsigned long now = jiffies;
4536 int status;
4537
bc7a05ca 4538 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4539 if (status < 0)
4540 return status;
452e9352 4541 do_renew_lease(clp, now);
1da177e4
LT		 4542 return 0;
4543}
4544
aa1870af
BF		 4545static inline int nfs4_server_supports_acls(struct nfs_server *server)
4546{
7dd7d959 4547 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4548}
4549
21f498c2
TM		 4550/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4551 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4552 * the stack.
4553 */
21f498c2 4554#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4555
e9e3d724
NH		 4556static int buf_to_pages_noslab(const void *buf, size_t buflen,
4557 struct page **pages, unsigned int *pgbase)
4558{
4559 struct page *newpage, **spages;
4560 int rc = 0;
4561 size_t len;
4562 spages = pages;
4563
4564 do {
21f498c2 4565 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4566 newpage = alloc_page(GFP_KERNEL);
4567
4568 if (newpage == NULL)
4569 goto unwind;
4570 memcpy(page_address(newpage), buf, len);
4571 buf += len;
4572 buflen -= len;
4573 *pages++ = newpage;
4574 rc++;
4575 } while (buflen != 0);
4576
4577 return rc;
4578
4579unwind:
4580 for(; rc > 0; rc--)
4581 __free_page(spages[rc-1]);
4582 return -ENOMEM;
4583}
4584
e50a1c2e
BF		 4585struct nfs4_cached_acl {
4586 int cached;
4587 size_t len;
3e9d4154 4588 char data[0];
e50a1c2e
BF		 4589};
4590
4591static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4592{
4593 struct nfs_inode *nfsi = NFS_I(inode);
4594
4595 spin_lock(&inode->i_lock);
4596 kfree(nfsi->nfs4_acl);
4597 nfsi->nfs4_acl = acl;
4598 spin_unlock(&inode->i_lock);
4599}
4600
4601static void nfs4_zap_acl_attr(struct inode *inode)
4602{
4603 nfs4_set_cached_acl(inode, NULL);
4604}
4605
4606static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4607{
4608 struct nfs_inode *nfsi = NFS_I(inode);
4609 struct nfs4_cached_acl *acl;
4610 int ret = -ENOENT;
4611
4612 spin_lock(&inode->i_lock);
4613 acl = nfsi->nfs4_acl;
4614 if (acl == NULL)
4615 goto out;
4616 if (buf == NULL) /* user is just asking for length */
4617 goto out_len;
4618 if (acl->cached == 0)
4619 goto out;
4620 ret = -ERANGE; /* see getxattr(2) man page */
4621 if (acl->len > buflen)
4622 goto out;
4623 memcpy(buf, acl->data, acl->len);
4624out_len:
4625 ret = acl->len;
4626out:
4627 spin_unlock(&inode->i_lock);
4628 return ret;
4629}
4630
5794d21e 4631static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4632{
4633 struct nfs4_cached_acl *acl;
b291f1b1 4634 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4635
1f1ea6c2 4636 if (buflen <= PAGE_SIZE) {
b291f1b1 4637 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4638 if (acl == NULL)
4639 goto out;
4640 acl->cached = 1;
5794d21e 4641 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4642 } else {
4643 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4644 if (acl == NULL)
4645 goto out;
4646 acl->cached = 0;
4647 }
4648 acl->len = acl_len;
4649out:
4650 nfs4_set_cached_acl(inode, acl);
4651}
4652
bf118a34
AA		 4653/*
4654 * The getxattr API returns the required buffer length when called with a
4655 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4656 * the required buf. On a NULL buf, we send a page of data to the server
4657 * guessing that the ACL request can be serviced by a page. If so, we cache
4658 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4659 * the cache. If not so, we throw away the page, and cache the required
4660 * length. The next getxattr call will then produce another round trip to
4661 * the server, this time with the input buf of the required size.
4662 */
16b4289c 4663static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4664{
bf118a34 4665 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4666 struct nfs_getaclargs args = {
4667 .fh = NFS_FH(inode),
4668 .acl_pages = pages,
4669 .acl_len = buflen,
4670 };
663c79b3
BH		 4671 struct nfs_getaclres res = {
4672 .acl_len = buflen,
4673 };
aa1870af
BF		 4674 struct rpc_message msg = {
4675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4676 .rpc_argp = &args,
663c79b3 4677 .rpc_resp = &res,
aa1870af 4678 };
21f498c2
TM		 4679 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4680 int ret = -ENOMEM, i;
aa1870af 4681
bf118a34
AA		 4682 /* As long as we're doing a round trip to the server anyway,
4683 * let's be prepared for a page of acl data. */
4684 if (npages == 0)
4685 npages = 1;
21f498c2
TM		 4686 if (npages > ARRAY_SIZE(pages))
4687 return -ERANGE;
5a006899 4688
bf118a34
AA		 4689 for (i = 0; i < npages; i++) {
4690 pages[i] = alloc_page(GFP_KERNEL);
4691 if (!pages[i])
4692 goto out_free;
e50a1c2e 4693 }
5a006899
SP		 4694
4695 /* for decoding across pages */
4696 res.acl_scratch = alloc_page(GFP_KERNEL);
4697 if (!res.acl_scratch)
4698 goto out_free;
4699
bf118a34
AA		 4700 args.acl_len = npages * PAGE_SIZE;
4701 args.acl_pgbase = 0;
5a006899 4702
de040bec 4703 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4704 __func__, buf, buflen, npages, args.acl_len);
4705 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4706 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4707 if (ret)
4708 goto out_free;
bf118a34 4709
1f1ea6c2
TM		 4710 /* Handle the case where the passed-in buffer is too short */
4711 if (res.acl_flags & NFS4_ACL_TRUNC) {
4712 /* Did the user only issue a request for the acl length? */
4713 if (buf == NULL)
4714 goto out_ok;
e50a1c2e 4715 ret = -ERANGE;
1f1ea6c2 4716 goto out_free;
e50a1c2e 4717 }
1f1ea6c2 4718 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4719 if (buf) {
4720 if (res.acl_len > buflen) {
4721 ret = -ERANGE;
4722 goto out_free;
4723 }
1f1ea6c2 4724 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4725 }
1f1ea6c2
TM		 4726out_ok:
4727 ret = res.acl_len;
e50a1c2e 4728out_free:
bf118a34
AA		 4729 for (i = 0; i < npages; i++)
4730 if (pages[i])
4731 __free_page(pages[i]);
331818f1
TM		 4732 if (res.acl_scratch)
4733 __free_page(res.acl_scratch);
aa1870af
BF		 4734 return ret;
4735}
4736
16b4289c
TM		 4737static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4738{
4739 struct nfs4_exception exception = { };
4740 ssize_t ret;
4741 do {
4742 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4743 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4744 if (ret >= 0)
4745 break;
4746 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4747 } while (exception.retry);
4748 return ret;
4749}
4750
e50a1c2e
BF		 4751static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4752{
4753 struct nfs_server *server = NFS_SERVER(inode);
4754 int ret;
4755
4756 if (!nfs4_server_supports_acls(server))
4757 return -EOPNOTSUPP;
4758 ret = nfs_revalidate_inode(server, inode);
4759 if (ret < 0)
4760 return ret;
08a22b39
AK		 4761 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4762 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4763 ret = nfs4_read_cached_acl(inode, buf, buflen);
4764 if (ret != -ENOENT)
bf118a34
AA		 4765 /* -ENOENT is returned if there is no ACL or if there is an ACL
4766 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4767 return ret;
4768 return nfs4_get_acl_uncached(inode, buf, buflen);
4769}
4770
16b4289c 4771static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4772{
4773 struct nfs_server *server = NFS_SERVER(inode);
4774 struct page *pages[NFS4ACL_MAXPAGES];
4775 struct nfs_setaclargs arg = {
4776 .fh = NFS_FH(inode),
4777 .acl_pages = pages,
4778 .acl_len = buflen,
4779 };
73c403a9 4780 struct nfs_setaclres res;
4b580ee3
BF		 4781 struct rpc_message msg = {
4782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4783 .rpc_argp = &arg,
73c403a9 4784 .rpc_resp = &res,
4b580ee3 4785 };
21f498c2 4786 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4787 int ret, i;
4b580ee3
BF		 4788
4789 if (!nfs4_server_supports_acls(server))
4790 return -EOPNOTSUPP;
21f498c2
TM		 4791 if (npages > ARRAY_SIZE(pages))
4792 return -ERANGE;
e9e3d724
NH		 4793 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4794 if (i < 0)
4795 return i;
57ec14c5 4796 nfs4_inode_return_delegation(inode);
7c513058 4797 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4798
4799 /*
4800 * Free each page after tx, so the only ref left is
4801 * held by the network stack
4802 */
4803 for (; i > 0; i--)
4804 put_page(pages[i-1]);
4805
08a22b39
AK		 4806 /*
4807 * Acl update can result in inode attribute update.
4808 * so mark the attribute cache invalid.
4809 */
4810 spin_lock(&inode->i_lock);
4811 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4812 spin_unlock(&inode->i_lock);
f41f7418
TM		 4813 nfs_access_zap_cache(inode);
4814 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4815 return ret;
4816}
4817
16b4289c
TM		 4818static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4819{
4820 struct nfs4_exception exception = { };
4821 int err;
4822 do {
c1578b76
TM		 4823 err = __nfs4_proc_set_acl(inode, buf, buflen);
4824 trace_nfs4_set_acl(inode, err);
4825 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4826 &exception);
4827 } while (exception.retry);
4828 return err;
4829}
4830
aa9c2669
DQ		 4831#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4832static int _nfs4_get_security_label(struct inode *inode, void *buf,
4833 size_t buflen)
4834{
4835 struct nfs_server *server = NFS_SERVER(inode);
4836 struct nfs_fattr fattr;
4837 struct nfs4_label label = {0, 0, buflen, buf};
4838
4839 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4840 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4841 .fh = NFS_FH(inode),
4842 .bitmask = bitmask,
4843 };
4844 struct nfs4_getattr_res res = {
4845 .fattr = &fattr,
4846 .label = &label,
4847 .server = server,
4848 };
4849 struct rpc_message msg = {
4850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4851 .rpc_argp = &arg,
aa9c2669
DQ		 4852 .rpc_resp = &res,
4853 };
4854 int ret;
4855
4856 nfs_fattr_init(&fattr);
4857
fcb63a9b 4858 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4859 if (ret)
4860 return ret;
4861 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4862 return -ENOENT;
4863 if (buflen < label.len)
4864 return -ERANGE;
4865 return 0;
4866}
4867
4868static int nfs4_get_security_label(struct inode *inode, void *buf,
4869 size_t buflen)
4870{
4871 struct nfs4_exception exception = { };
4872 int err;
4873
4874 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4875 return -EOPNOTSUPP;
4876
4877 do {
c1578b76
TM		 4878 err = _nfs4_get_security_label(inode, buf, buflen);
4879 trace_nfs4_get_security_label(inode, err);
4880 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4881 &exception);
4882 } while (exception.retry);
4883 return err;
4884}
4885
4886static int _nfs4_do_set_security_label(struct inode *inode,
4887 struct nfs4_label *ilabel,
4888 struct nfs_fattr *fattr,
4889 struct nfs4_label *olabel)
4890{
4891
4892 struct iattr sattr = {0};
4893 struct nfs_server *server = NFS_SERVER(inode);
4894 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4895 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4896 .fh = NFS_FH(inode),
4897 .iap = &sattr,
4898 .server = server,
4899 .bitmask = bitmask,
4900 .label = ilabel,
4901 };
4902 struct nfs_setattrres res = {
4903 .fattr = fattr,
4904 .label = olabel,
4905 .server = server,
4906 };
4907 struct rpc_message msg = {
4908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4909 .rpc_argp = &arg,
aa9c2669
DQ		 4910 .rpc_resp = &res,
4911 };
4912 int status;
4913
12207f69 4914 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4915
12207f69 4916 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4917 if (status)
4918 dprintk("%s failed: %d\n", __func__, status);
4919
4920 return status;
4921}
4922
4923static int nfs4_do_set_security_label(struct inode *inode,
4924 struct nfs4_label *ilabel,
4925 struct nfs_fattr *fattr,
4926 struct nfs4_label *olabel)
4927{
4928 struct nfs4_exception exception = { };
4929 int err;
4930
4931 do {
c1578b76
TM		 4932 err = _nfs4_do_set_security_label(inode, ilabel,
4933 fattr, olabel);
4934 trace_nfs4_set_security_label(inode, err);
4935 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4936 &exception);
4937 } while (exception.retry);
4938 return err;
4939}
4940
4941static int
4942nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4943{
4944 struct nfs4_label ilabel, *olabel = NULL;
4945 struct nfs_fattr fattr;
4946 struct rpc_cred *cred;
2b0143b5 4947 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4948 int status;
4949
4950 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4951 return -EOPNOTSUPP;
4952
4953 nfs_fattr_init(&fattr);
4954
4955 ilabel.pi = 0;
4956 ilabel.lfs = 0;
4957 ilabel.label = (char *)buf;
4958 ilabel.len = buflen;
4959
4960 cred = rpc_lookup_cred();
4961 if (IS_ERR(cred))
4962 return PTR_ERR(cred);
4963
4964 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4965 if (IS_ERR(olabel)) {
4966 status = -PTR_ERR(olabel);
4967 goto out;
4968 }
4969
4970 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4971 if (status == 0)
4972 nfs_setsecurity(inode, &fattr, olabel);
4973
4974 nfs4_label_free(olabel);
4975out:
4976 put_rpccred(cred);
4977 return status;
4978}
4979#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4980
4981
1da177e4 4982static int
516285eb 4983nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
8478eaa1 4984 struct nfs4_state *state, long *timeout)
1da177e4 4985{
aa5190d0
TM		 4986 struct nfs_client *clp = server->nfs_client;
4987
4988 if (task->tk_status >= 0)
1da177e4
LT		 4989 return 0;
4990 switch(task->tk_status) {
a1d0b5ee 4991 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4992 case -NFS4ERR_ADMIN_REVOKED:
4993 case -NFS4ERR_BAD_STATEID:
4994 case -NFS4ERR_OPENMODE:
4995 if (state == NULL)
4996 break;
5d422301 4997 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4998 goto recovery_failed;
0400a6b0 4999 goto wait_on_recovery;
0ced63d1 5000 case -NFS4ERR_EXPIRED:
5d422301
TM		 5001 if (state != NULL) {
5002 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 5003 goto recovery_failed;
5d422301 5004 }
1da177e4 5005 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5006 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 5007 nfs4_schedule_lease_recovery(clp);
5008 goto wait_on_recovery;
519ae255
CL		 5009 case -NFS4ERR_MOVED:
5010 if (nfs4_schedule_migration_recovery(server) < 0)
5011 goto recovery_failed;
5012 goto wait_on_recovery;
8ef2f8d4
CL		 5013 case -NFS4ERR_LEASE_MOVED:
5014 nfs4_schedule_lease_moved_recovery(clp);
5015 goto wait_on_recovery;
4745e315
AA		 5016#if defined(CONFIG_NFS_V4_1)
5017 case -NFS4ERR_BADSESSION:
5018 case -NFS4ERR_BADSLOT:
5019 case -NFS4ERR_BAD_HIGH_SLOT:
5020 case -NFS4ERR_DEADSESSION:
5021 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5022 case -NFS4ERR_SEQ_FALSE_RETRY:
5023 case -NFS4ERR_SEQ_MISORDERED:
5024 dprintk("%s ERROR %d, Reset session\n", __func__,
5025 task->tk_status);
9f594791 5026 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 5027 goto wait_on_recovery;
4745e315 5028#endif /* CONFIG_NFS_V4_1 */
1da177e4 5029 case -NFS4ERR_DELAY:
aa5190d0 5030 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 5031 rpc_delay(task, nfs4_update_delay(timeout));
5032 goto restart_call;
006ea73e 5033 case -NFS4ERR_GRACE:
1da177e4 5034 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 5035 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 5036 case -NFS4ERR_OLD_STATEID:
f1478c13 5037 goto restart_call;
1da177e4
LT		 5038 }
5039 task->tk_status = nfs4_map_errors(task->tk_status);
5040 return 0;
9f51a78e 5041recovery_failed:
5d422301
TM		 5042 task->tk_status = -EIO;
5043 return 0;
0400a6b0 5044wait_on_recovery:
a2c0b9e2 5045 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 5046 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5047 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 5048 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5049 goto recovery_failed;
f1478c13 5050restart_call:
a2c0b9e2
TM		 5051 task->tk_status = 0;
5052 return -EAGAIN;
1da177e4
LT		 5053}
5054
f092075d
CL		 5055static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5056 nfs4_verifier *bootverf)
cd93710e
CL		 5057{
5058 __be32 verf[2];
5059
2c820d9a
CL		 5060 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5061 /* An impossible timestamp guarantees this value
5062 * will never match a generated boot time. */
5063 verf[0] = 0;
17f26b12 5064 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5065 } else {
f092075d 5066 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5067 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5068 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5069 }
cd93710e
CL		 5070 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5071}
5072
a3192688
JL		 5073static int
5074nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5075{
a3192688
JL		 5076 int result;
5077 size_t len;
5078 char *str;
e984a55a 5079
ceb3a16c 5080 if (clp->cl_owner_id != NULL)
a3192688 5081 return 0;
4a3e5779 5082
a3192688 5083 rcu_read_lock();
4a70316c 5084 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5085 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5086 1 +
5087 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5088 1;
5089 rcu_read_unlock();
5090
5091 if (len > NFS4_OPAQUE_LIMIT + 1)
5092 return -EINVAL;
5093
5094 /*
5095 * Since this string is allocated at mount time, and held until the
5096 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5097 * about a memory-reclaim deadlock.
5098 */
5099 str = kmalloc(len, GFP_KERNEL);
5100 if (!str)
5101 return -ENOMEM;
ceb3a16c 5102
e984a55a 5103 rcu_read_lock();
a3192688
JL		 5104 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5105 clp->cl_ipaddr,
5106 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5107 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5108 rcu_read_unlock();
a3192688 5109
a3192688
JL		 5110 clp->cl_owner_id = str;
5111 return 0;
e984a55a
CL		 5112}
5113
873e3851
JL		 5114static int
5115nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5116{
5117 int result;
5118 size_t len;
5119 char *str;
5120
5121 len = 10 + 10 + 1 + 10 + 1 +
5122 strlen(nfs4_client_id_uniquifier) + 1 +
5123 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5124
5125 if (len > NFS4_OPAQUE_LIMIT + 1)
5126 return -EINVAL;
5127
5128 /*
5129 * Since this string is allocated at mount time, and held until the
5130 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5131 * about a memory-reclaim deadlock.
5132 */
5133 str = kmalloc(len, GFP_KERNEL);
5134 if (!str)
5135 return -ENOMEM;
5136
5137 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5138 clp->rpc_ops->version, clp->cl_minorversion,
5139 nfs4_client_id_uniquifier,
5140 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5141 clp->cl_owner_id = str;
5142 return 0;
5143}
5144
5145static int
5146nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5147{
873e3851
JL		 5148 int result;
5149 size_t len;
5150 char *str;
ceb3a16c
TM		 5151
5152 if (clp->cl_owner_id != NULL)
873e3851 5153 return 0;
6f2ea7f2
CL		 5154
5155 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5156 return nfs4_init_uniquifier_client_string(clp);
5157
5158 len = 10 + 10 + 1 + 10 + 1 +
5159 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5160
5161 if (len > NFS4_OPAQUE_LIMIT + 1)
5162 return -EINVAL;
5163
5164 /*
5165 * Since this string is allocated at mount time, and held until the
5166 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5167 * about a memory-reclaim deadlock.
5168 */
5169 str = kmalloc(len, GFP_KERNEL);
5170 if (!str)
5171 return -ENOMEM;
5172
5173 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5174 clp->rpc_ops->version, clp->cl_minorversion,
5175 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5176 clp->cl_owner_id = str;
5177 return 0;
e984a55a
CL		 5178}
5179
706cb8db
CL		 5180/*
5181 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5182 * services. Advertise one based on the address family of the
5183 * clientaddr.
5184 */
5185static unsigned int
5186nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5187{
5188 if (strchr(clp->cl_ipaddr, ':') != NULL)
5189 return scnprintf(buf, len, "tcp6");
5190 else
5191 return scnprintf(buf, len, "tcp");
5192}
5193
f11b2a1c
JL		 5194static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5195{
5196 struct nfs4_setclientid *sc = calldata;
5197
5198 if (task->tk_status == 0)
5199 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5200}
5201
5202static const struct rpc_call_ops nfs4_setclientid_ops = {
5203 .rpc_call_done = nfs4_setclientid_done,
5204};
5205
6bbb4ae8
CL		 5206/**
5207 * nfs4_proc_setclientid - Negotiate client ID
5208 * @clp: state data structure
5209 * @program: RPC program for NFSv4 callback service
5210 * @port: IP port number for NFS4 callback service
5211 * @cred: RPC credential to use for this call
5212 * @res: where to place the result
5213 *
5214 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5215 */
bb8b27e5
TM		 5216int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5217 unsigned short port, struct rpc_cred *cred,
5218 struct nfs4_setclientid_res *res)
1da177e4
LT		 5219{
5220 nfs4_verifier sc_verifier;
5221 struct nfs4_setclientid setclientid = {
5222 .sc_verifier = &sc_verifier,
5223 .sc_prog = program,
3a6bb738 5224 .sc_clnt = clp,
1da177e4
LT		 5225 };
5226 struct rpc_message msg = {
5227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5228 .rpc_argp = &setclientid,
bb8b27e5 5229 .rpc_resp = res,
286d7d6a 5230 .rpc_cred = cred,
1da177e4 5231 };
f11b2a1c
JL		 5232 struct rpc_task *task;
5233 struct rpc_task_setup task_setup_data = {
5234 .rpc_client = clp->cl_rpcclient,
5235 .rpc_message = &msg,
5236 .callback_ops = &nfs4_setclientid_ops,
5237 .callback_data = &setclientid,
5238 .flags = RPC_TASK_TIMEOUT,
5239 };
6bbb4ae8 5240 int status;
1da177e4 5241
de734831 5242 /* nfs_client_id4 */
f092075d 5243 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5244
5245 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5246 status = nfs4_init_uniform_client_string(clp);
5247 else
a3192688 5248 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5249
5250 if (status)
5251 goto out;
3a6bb738 5252
de734831 5253 /* cb_client4 */
706cb8db
CL		 5254 setclientid.sc_netid_len =
5255 nfs4_init_callback_netid(clp,
5256 setclientid.sc_netid,
5257 sizeof(setclientid.sc_netid));
de734831 5258 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5259 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5260 clp->cl_ipaddr, port >> 8, port & 255);
5261
3a6bb738 5262 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5263 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5264 clp->cl_owner_id);
f11b2a1c
JL		 5265 task = rpc_run_task(&task_setup_data);
5266 if (IS_ERR(task)) {
5267 status = PTR_ERR(task);
5268 goto out;
5269 }
5270 status = task->tk_status;
5271 if (setclientid.sc_cred) {
5272 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5273 put_rpccred(setclientid.sc_cred);
5274 }
5275 rpc_put_task(task);
5276out:
c6d01c6f 5277 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5278 dprintk("NFS reply setclientid: %d\n", status);
5279 return status;
1da177e4
LT		 5280}
5281
6bbb4ae8
CL		 5282/**
5283 * nfs4_proc_setclientid_confirm - Confirm client ID
5284 * @clp: state data structure
5285 * @res: result of a previous SETCLIENTID
5286 * @cred: RPC credential to use for this call
5287 *
5288 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5289 */
fd954ae1 5290int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5291 struct nfs4_setclientid_res *arg,
5292 struct rpc_cred *cred)
1da177e4 5293{
1da177e4
LT		 5294 struct rpc_message msg = {
5295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5296 .rpc_argp = arg,
286d7d6a 5297 .rpc_cred = cred,
1da177e4 5298 };
1da177e4
LT		 5299 int status;
5300
6bbb4ae8
CL		 5301 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5302 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5303 clp->cl_clientid);
1bd714f2 5304 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5305 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5306 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5307 return status;
5308}
5309
fe650407
TM		 5310struct nfs4_delegreturndata {
5311 struct nfs4_delegreturnargs args;
fa178f29 5312 struct nfs4_delegreturnres res;
fe650407
TM		 5313 struct nfs_fh fh;
5314 nfs4_stateid stateid;
26e976a8 5315 unsigned long timestamp;
fa178f29 5316 struct nfs_fattr fattr;
fe650407 5317 int rpc_status;
039b756a
PT		 5318 struct inode *inode;
5319 bool roc;
5320 u32 roc_barrier;
fe650407
TM		 5321};
5322
fe650407
TM		 5323static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5324{
5325 struct nfs4_delegreturndata *data = calldata;
938e1010 5326
14516c3a
TM		 5327 if (!nfs4_sequence_done(task, &data->res.seq_res))
5328 return;
938e1010 5329
ca8acf8d 5330 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5331 switch (task->tk_status) {
79708861 5332 case 0:
fa178f29 5333 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5334 case -NFS4ERR_ADMIN_REVOKED:
5335 case -NFS4ERR_DELEG_REVOKED:
5336 case -NFS4ERR_BAD_STATEID:
5337 case -NFS4ERR_OLD_STATEID:
5338 case -NFS4ERR_STALE_STATEID:
5339 case -NFS4ERR_EXPIRED:
5340 task->tk_status = 0;
039b756a
PT		 5341 if (data->roc)
5342 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5343 break;
79708861 5344 default:
8478eaa1
N		 5345 if (nfs4_async_handle_error(task, data->res.server,
5346 NULL, NULL) == -EAGAIN) {
d00c5d43 5347 rpc_restart_call_prepare(task);
79708861
RL		 5348 return;
5349 }
5350 }
5351 data->rpc_status = task->tk_status;
fe650407
TM		 5352}
5353
5354static void nfs4_delegreturn_release(void *calldata)
5355{
039b756a 5356 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5357 struct inode *inode = data->inode;
039b756a 5358
ea7c38fe
TM		 5359 if (inode) {
5360 if (data->roc)
5361 pnfs_roc_release(inode);
5362 nfs_iput_and_deactive(inode);
5363 }
fe650407
TM		 5364 kfree(calldata);
5365}
5366
938e1010
AA		 5367static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5368{
5369 struct nfs4_delegreturndata *d_data;
5370
5371 d_data = (struct nfs4_delegreturndata *)data;
5372
500d701f
PT		 5373 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5374 return;
5375
4ff376fe
TM		 5376 if (d_data->roc)
5377 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5378
d9afbd1b
TM		 5379 nfs4_setup_sequence(d_data->res.server,
5380 &d_data->args.seq_args,
5381 &d_data->res.seq_res,
5382 task);
938e1010 5383}
938e1010 5384
c8d149f3 5385static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5386 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5387 .rpc_call_done = nfs4_delegreturn_done,
5388 .rpc_release = nfs4_delegreturn_release,
5389};
5390
e6f81075 5391static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5392{
5393 struct nfs4_delegreturndata *data;
fa178f29 5394 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5395 struct rpc_task *task;
5138fde0
TM		 5396 struct rpc_message msg = {
5397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5398 .rpc_cred = cred,
5399 };
c970aa85
TM		 5400 struct rpc_task_setup task_setup_data = {
5401 .rpc_client = server->client,
5138fde0 5402 .rpc_message = &msg,
c970aa85
TM		 5403 .callback_ops = &nfs4_delegreturn_ops,
5404 .flags = RPC_TASK_ASYNC,
5405 };
e6f81075 5406 int status = 0;
fe650407 5407
8535b2be 5408 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5409 if (data == NULL)
5410 return -ENOMEM;
a9c92d6b 5411 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5412 data->args.fhandle = &data->fh;
5413 data->args.stateid = &data->stateid;
9e907fec 5414 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5415 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5416 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5417 data->res.fattr = &data->fattr;
5418 data->res.server = server;
5138fde0 5419 nfs_fattr_init(data->res.fattr);
26e976a8 5420 data->timestamp = jiffies;
fe650407 5421 data->rpc_status = 0;
ea7c38fe
TM		 5422 data->inode = nfs_igrab_and_active(inode);
5423 if (data->inode)
5424 data->roc = nfs4_roc(inode);
fe650407 5425
c970aa85 5426 task_setup_data.callback_data = data;
1174dd1f
TM		 5427 msg.rpc_argp = &data->args;
5428 msg.rpc_resp = &data->res;
c970aa85 5429 task = rpc_run_task(&task_setup_data);
7a1218a2 5430 if (IS_ERR(task))
fe650407 5431 return PTR_ERR(task);
e6f81075
TM		 5432 if (!issync)
5433 goto out;
fe650407 5434 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5435 if (status != 0)
5436 goto out;
5437 status = data->rpc_status;
e144cbcc
TM		 5438 if (status == 0)
5439 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5440 else
5441 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5442out:
e6b3c4db 5443 rpc_put_task(task);
fe650407 5444 return status;
1da177e4
LT		 5445}
5446
e6f81075 5447int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5448{
5449 struct nfs_server *server = NFS_SERVER(inode);
5450 struct nfs4_exception exception = { };
5451 int err;
5452 do {
e6f81075 5453 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5454 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5455 switch (err) {
5456 case -NFS4ERR_STALE_STATEID:
5457 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5458 case 0:
5459 return 0;
5460 }
5461 err = nfs4_handle_exception(server, err, &exception);
5462 } while (exception.retry);
5463 return err;
5464}
5465
5466#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5467#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5468
5469/*
5470 * sleep, with exponential backoff, and retry the LOCK operation.
5471 */
5472static unsigned long
5473nfs4_set_lock_task_retry(unsigned long timeout)
5474{
416ad3c9 5475 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5476 timeout <<= 1;
5477 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5478 return NFS4_LOCK_MAXTIMEOUT;
5479 return timeout;
5480}
5481
1da177e4
LT		 5482static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5483{
5484 struct inode *inode = state->inode;
5485 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5486 struct nfs_client *clp = server->nfs_client;
911d1aaf 5487 struct nfs_lockt_args arg = {
1da177e4 5488 .fh = NFS_FH(inode),
911d1aaf 5489 .fl = request,
1da177e4 5490 };
911d1aaf
TM		 5491 struct nfs_lockt_res res = {
5492 .denied = request,
1da177e4
LT		 5493 };
5494 struct rpc_message msg = {
5495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5496 .rpc_argp = &arg,
5497 .rpc_resp = &res,
5498 .rpc_cred = state->owner->so_cred,
5499 };
1da177e4
LT		 5500 struct nfs4_lock_state *lsp;
5501 int status;
5502
911d1aaf 5503 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5504 status = nfs4_set_lock_state(state, request);
5505 if (status != 0)
5506 goto out;
5507 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5508 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5509 arg.lock_owner.s_dev = server->s_dev;
7c513058 5510 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5511 switch (status) {
5512 case 0:
5513 request->fl_type = F_UNLCK;
5514 break;
5515 case -NFS4ERR_DENIED:
5516 status = 0;
1da177e4 5517 }
70cc6487 5518 request->fl_ops->fl_release_private(request);
a6f951dd 5519 request->fl_ops = NULL;
8d0a8a9d 5520out:
1da177e4
LT		 5521 return status;
5522}
5523
5524static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5525{
5526 struct nfs4_exception exception = { };
5527 int err;
5528
5529 do {
d1b748a5
TM		 5530 err = _nfs4_proc_getlk(state, cmd, request);
5531 trace_nfs4_get_lock(request, state, cmd, err);
5532 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5533 &exception);
5534 } while (exception.retry);
5535 return err;
5536}
5537
83bfff23 5538static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5539{
5540 int res = 0;
5541 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5542 case FL_POSIX:
83bfff23 5543 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5544 break;
5545 case FL_FLOCK:
83bfff23 5546 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5547 break;
5548 default:
5549 BUG();
5550 }
1da177e4
LT		 5551 return res;
5552}
5553
faf5f49c 5554struct nfs4_unlockdata {
911d1aaf
TM		 5555 struct nfs_locku_args arg;
5556 struct nfs_locku_res res;
faf5f49c
TM		 5557 struct nfs4_lock_state *lsp;
5558 struct nfs_open_context *ctx;
911d1aaf 5559 struct file_lock fl;
516285eb 5560 struct nfs_server *server;
26e976a8 5561 unsigned long timestamp;
faf5f49c
TM		 5562};
5563
911d1aaf
TM		 5564static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5565 struct nfs_open_context *ctx,
5566 struct nfs4_lock_state *lsp,
5567 struct nfs_seqid *seqid)
5568{
5569 struct nfs4_unlockdata *p;
5570 struct inode *inode = lsp->ls_state->inode;
5571
8535b2be 5572 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5573 if (p == NULL)
5574 return NULL;
5575 p->arg.fh = NFS_FH(inode);
5576 p->arg.fl = &p->fl;
5577 p->arg.seqid = seqid;
c1d51931 5578 p->res.seqid = seqid;
911d1aaf
TM		 5579 p->lsp = lsp;
5580 atomic_inc(&lsp->ls_count);
5581 /* Ensure we don't close file until we're done freeing locks! */
5582 p->ctx = get_nfs_open_context(ctx);
5583 memcpy(&p->fl, fl, sizeof(p->fl));
5584 p->server = NFS_SERVER(inode);
5585 return p;
5586}
5587
06f814a3 5588static void nfs4_locku_release_calldata(void *data)
faf5f49c 5589{
963d8fe5 5590 struct nfs4_unlockdata *calldata = data;
911d1aaf 5591 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5592 nfs4_put_lock_state(calldata->lsp);
5593 put_nfs_open_context(calldata->ctx);
5594 kfree(calldata);
faf5f49c
TM		 5595}
5596
963d8fe5 5597static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5598{
963d8fe5 5599 struct nfs4_unlockdata *calldata = data;
faf5f49c 5600
14516c3a
TM		 5601 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5602 return;
faf5f49c
TM		 5603 switch (task->tk_status) {
5604 case 0:
26e976a8 5605 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5606 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5607 if (nfs4_update_lock_stateid(calldata->lsp,
5608 &calldata->res.stateid))
5609 break;
9e33bed5
TM		 5610 case -NFS4ERR_BAD_STATEID:
5611 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5612 case -NFS4ERR_STALE_STATEID:
5613 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5614 if (!nfs4_stateid_match(&calldata->arg.stateid,
5615 &calldata->lsp->ls_stateid))
5616 rpc_restart_call_prepare(task);
faf5f49c
TM		 5617 break;
5618 default:
8478eaa1
N		 5619 if (nfs4_async_handle_error(task, calldata->server,
5620 NULL, NULL) == -EAGAIN)
d00c5d43 5621 rpc_restart_call_prepare(task);
faf5f49c 5622 }
2b1bc308 5623 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5624}
5625
4ce70ada 5626static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5627{
4ce70ada 5628 struct nfs4_unlockdata *calldata = data;
faf5f49c 5629
911d1aaf 5630 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5631 goto out_wait;
425c1d4e 5632 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5633 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5634 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5635 goto out_no_action;
faf5f49c 5636 }
26e976a8 5637 calldata->timestamp = jiffies;
035168ab 5638 if (nfs4_setup_sequence(calldata->server,
a893693c 5639 &calldata->arg.seq_args,
2240a9e2
TM		 5640 &calldata->res.seq_res,
5641 task) != 0)
5642 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5643 return;
5644out_no_action:
5645 task->tk_action = NULL;
5646out_wait:
5647 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5648}
5649
963d8fe5 5650static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5651 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5652 .rpc_call_done = nfs4_locku_done,
06f814a3 5653 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5654};
5655
a5d16a4d
TM		 5656static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5657 struct nfs_open_context *ctx,
5658 struct nfs4_lock_state *lsp,
5659 struct nfs_seqid *seqid)
5660{
5661 struct nfs4_unlockdata *data;
5138fde0
TM		 5662 struct rpc_message msg = {
5663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5664 .rpc_cred = ctx->cred,
5665 };
c970aa85
TM		 5666 struct rpc_task_setup task_setup_data = {
5667 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5668 .rpc_message = &msg,
c970aa85 5669 .callback_ops = &nfs4_locku_ops,
101070ca 5670 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5671 .flags = RPC_TASK_ASYNC,
5672 };
a5d16a4d 5673
fa940720
WAA		 5674 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5675 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5676
137d6aca
FF		 5677 /* Ensure this is an unlock - when canceling a lock, the
5678 * canceled lock is passed in, and it won't be an unlock.
5679 */
5680 fl->fl_type = F_UNLCK;
5681
a5d16a4d
TM		 5682 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5683 if (data == NULL) {
5684 nfs_free_seqid(seqid);
5685 return ERR_PTR(-ENOMEM);
5686 }
5687
a9c92d6b 5688 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5689 msg.rpc_argp = &data->arg;
5690 msg.rpc_resp = &data->res;
c970aa85
TM		 5691 task_setup_data.callback_data = data;
5692 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5693}
5694
faf5f49c
TM		 5695static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5696{
65b62a29
TM		 5697 struct inode *inode = state->inode;
5698 struct nfs4_state_owner *sp = state->owner;
5699 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5700 struct nfs_seqid *seqid;
1da177e4 5701 struct nfs4_lock_state *lsp;
06f814a3 5702 struct rpc_task *task;
b4019c0e 5703 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5704 int status = 0;
536ff0f8 5705 unsigned char fl_flags = request->fl_flags;
faf5f49c 5706
8d0a8a9d 5707 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5708 /* Unlock _before_ we do the RPC call */
5709 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5710 /* Exclude nfs_delegation_claim_locks() */
5711 mutex_lock(&sp->so_delegreturn_mutex);
5712 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5713 down_read(&nfsi->rwsem);
83bfff23 5714 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5715 up_read(&nfsi->rwsem);
65b62a29 5716 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5717 goto out;
19e03c57
TM		 5718 }
5719 up_read(&nfsi->rwsem);
65b62a29 5720 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5721 if (status != 0)
9b073574
TM		 5722 goto out;
5723 /* Is this a delegated lock? */
8d0a8a9d 5724 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5725 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5726 goto out;
b4019c0e
TM		 5727 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5728 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5729 status = -ENOMEM;
badc76dd 5730 if (IS_ERR(seqid))
9b073574 5731 goto out;
cd3758e3 5732 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5733 status = PTR_ERR(task);
5734 if (IS_ERR(task))
9b073574 5735 goto out;
a5d16a4d 5736 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5737 rpc_put_task(task);
9b073574 5738out:
536ff0f8 5739 request->fl_flags = fl_flags;
d1b748a5 5740 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5741 return status;
5742}
5743
a5d16a4d
TM		 5744struct nfs4_lockdata {
5745 struct nfs_lock_args arg;
5746 struct nfs_lock_res res;
5747 struct nfs4_lock_state *lsp;
5748 struct nfs_open_context *ctx;
5749 struct file_lock fl;
26e976a8 5750 unsigned long timestamp;
a5d16a4d
TM		 5751 int rpc_status;
5752 int cancelled;
66179efe 5753 struct nfs_server *server;
a5d16a4d
TM		 5754};
5755
5756static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5757 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5758 gfp_t gfp_mask)
1da177e4 5759{
a5d16a4d
TM		 5760 struct nfs4_lockdata *p;
5761 struct inode *inode = lsp->ls_state->inode;
1da177e4 5762 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5763 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5764
8535b2be 5765 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5766 if (p == NULL)
5767 return NULL;
5768
5769 p->arg.fh = NFS_FH(inode);
5770 p->arg.fl = &p->fl;
8535b2be 5771 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5772 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5773 goto out_free;
b4019c0e
TM		 5774 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5775 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5776 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5777 goto out_free_seqid;
7539bbab 5778 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5779 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5780 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5781 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5782 p->lsp = lsp;
66179efe 5783 p->server = server;
a5d16a4d
TM		 5784 atomic_inc(&lsp->ls_count);
5785 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5786 get_file(fl->fl_file);
a5d16a4d
TM		 5787 memcpy(&p->fl, fl, sizeof(p->fl));
5788 return p;
2f74c0a0
TM		 5789out_free_seqid:
5790 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5791out_free:
5792 kfree(p);
5793 return NULL;
5794}
5795
5796static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5797{
5798 struct nfs4_lockdata *data = calldata;
5799 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5800
3110ff80 5801 dprintk("%s: begin!\n", __func__);
2f74c0a0 5802 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5803 goto out_wait;
a5d16a4d 5804 /* Do we need to do an open_to_lock_owner? */
6b447539 5805 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5806 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5807 goto out_release_lock_seqid;
8fe72bac 5808 }
425c1d4e
TM		 5809 nfs4_stateid_copy(&data->arg.open_stateid,
5810 &state->open_stateid);
a5d16a4d 5811 data->arg.new_lock_owner = 1;
c1d51931 5812 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5813 } else {
2f74c0a0 5814 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5815 nfs4_stateid_copy(&data->arg.lock_stateid,
5816 &data->lsp->ls_stateid);
5817 }
5d422301
TM		 5818 if (!nfs4_valid_open_stateid(state)) {
5819 data->rpc_status = -EBADF;
5820 task->tk_action = NULL;
5821 goto out_release_open_seqid;
5822 }
26e976a8 5823 data->timestamp = jiffies;
035168ab
TM		 5824 if (nfs4_setup_sequence(data->server,
5825 &data->arg.seq_args,
2240a9e2 5826 &data->res.seq_res,
d9afbd1b 5827 task) == 0)
66179efe 5828 return;
5d422301 5829out_release_open_seqid:
2240a9e2
TM		 5830 nfs_release_seqid(data->arg.open_seqid);
5831out_release_lock_seqid:
5832 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5833out_wait:
5834 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5835 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5836}
5837
a5d16a4d
TM		 5838static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5839{
5840 struct nfs4_lockdata *data = calldata;
39071e6f 5841 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5842
3110ff80 5843 dprintk("%s: begin!\n", __func__);
a5d16a4d 5844
14516c3a
TM		 5845 if (!nfs4_sequence_done(task, &data->res.seq_res))
5846 return;
66179efe 5847
a5d16a4d 5848 data->rpc_status = task->tk_status;
425c1d4e
TM		 5849 switch (task->tk_status) {
5850 case 0:
2b0143b5 5851 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5852 data->timestamp);
c69899a1
TM		 5853 if (data->arg.new_lock) {
5854 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5855 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5856 rpc_restart_call_prepare(task);
5857 break;
5858 }
5859 }
39071e6f
TM		 5860 if (data->arg.new_lock_owner != 0) {
5861 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5862 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5863 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5864 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5865 rpc_restart_call_prepare(task);
425c1d4e
TM		 5866 break;
5867 case -NFS4ERR_BAD_STATEID:
5868 case -NFS4ERR_OLD_STATEID:
5869 case -NFS4ERR_STALE_STATEID:
5870 case -NFS4ERR_EXPIRED:
5871 if (data->arg.new_lock_owner != 0) {
5872 if (!nfs4_stateid_match(&data->arg.open_stateid,
5873 &lsp->ls_state->open_stateid))
5874 rpc_restart_call_prepare(task);
5875 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5876 &lsp->ls_stateid))
5877 rpc_restart_call_prepare(task);
a5d16a4d 5878 }
3110ff80 5879 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5880}
5881
5882static void nfs4_lock_release(void *calldata)
5883{
5884 struct nfs4_lockdata *data = calldata;
5885
3110ff80 5886 dprintk("%s: begin!\n", __func__);
2f74c0a0 5887 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5888 if (data->cancelled != 0) {
5889 struct rpc_task *task;
5890 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5891 data->arg.lock_seqid);
5892 if (!IS_ERR(task))
bf294b41 5893 rpc_put_task_async(task);
3110ff80 5894 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5895 } else
5896 nfs_free_seqid(data->arg.lock_seqid);
5897 nfs4_put_lock_state(data->lsp);
5898 put_nfs_open_context(data->ctx);
feaff8e5 5899 fput(data->fl.fl_file);
a5d16a4d 5900 kfree(data);
3110ff80 5901 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5902}
5903
5904static const struct rpc_call_ops nfs4_lock_ops = {
5905 .rpc_call_prepare = nfs4_lock_prepare,
5906 .rpc_call_done = nfs4_lock_done,
5907 .rpc_release = nfs4_lock_release,
5908};
5909
2bee72a6
TM		 5910static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5911{
2bee72a6
TM		 5912 switch (error) {
5913 case -NFS4ERR_ADMIN_REVOKED:
5914 case -NFS4ERR_BAD_STATEID:
ecac799a 5915 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5916 if (new_lock_owner != 0 ||
795a88c9 5917 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5918 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5919 break;
5920 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5921 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5922 case -NFS4ERR_EXPIRED:
5923 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5924 };
5925}
5926
afe6c27c 5927static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5928{
5929 struct nfs4_lockdata *data;
5930 struct rpc_task *task;
5138fde0
TM		 5931 struct rpc_message msg = {
5932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5933 .rpc_cred = state->owner->so_cred,
5934 };
c970aa85
TM		 5935 struct rpc_task_setup task_setup_data = {
5936 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5937 .rpc_message = &msg,
c970aa85 5938 .callback_ops = &nfs4_lock_ops,
101070ca 5939 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5940 .flags = RPC_TASK_ASYNC,
5941 };
a5d16a4d
TM		 5942 int ret;
5943
3110ff80 5944 dprintk("%s: begin!\n", __func__);
cd3758e3 5945 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5946 fl->fl_u.nfs4_fl.owner,
5947 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5948 if (data == NULL)
5949 return -ENOMEM;
5950 if (IS_SETLKW(cmd))
5951 data->arg.block = 1;
a9c92d6b 5952 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5953 msg.rpc_argp = &data->arg;
5954 msg.rpc_resp = &data->res;
c970aa85 5955 task_setup_data.callback_data = data;
8fe72bac
TM		 5956 if (recovery_type > NFS_LOCK_NEW) {
5957 if (recovery_type == NFS_LOCK_RECLAIM)
5958 data->arg.reclaim = NFS_LOCK_RECLAIM;
5959 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5960 } else
5961 data->arg.new_lock = 1;
c970aa85 5962 task = rpc_run_task(&task_setup_data);
7a1218a2 5963 if (IS_ERR(task))
a5d16a4d 5964 return PTR_ERR(task);
a5d16a4d
TM		 5965 ret = nfs4_wait_for_completion_rpc_task(task);
5966 if (ret == 0) {
5967 ret = data->rpc_status;
2bee72a6
TM		 5968 if (ret)
5969 nfs4_handle_setlk_error(data->server, data->lsp,
5970 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5971 } else
5972 data->cancelled = 1;
e6b3c4db 5973 rpc_put_task(task);
3110ff80 5974 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5975 return ret;
1da177e4
LT		 5976}
5977
5978static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5979{
202b50dc 5980 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5981 struct nfs4_exception exception = {
5982 .inode = state->inode,
5983 };
202b50dc
TM		 5984 int err;
5985
5986 do {
42a2d13e
TM		 5987 /* Cache the lock if possible... */
5988 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5989 return 0;
afe6c27c 5990 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5991 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5992 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5993 break;
5994 nfs4_handle_exception(server, err, &exception);
5995 } while (exception.retry);
5996 return err;
1da177e4
LT		 5997}
5998
5999static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6000{
202b50dc 6001 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6002 struct nfs4_exception exception = {
6003 .inode = state->inode,
6004 };
202b50dc
TM		 6005 int err;
6006
6bfc93ef
TM		 6007 err = nfs4_set_lock_state(state, request);
6008 if (err != 0)
6009 return err;
f6de7a39 6010 if (!recover_lost_locks) {
ef1820f9
N		 6011 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6012 return 0;
6013 }
202b50dc 6014 do {
42a2d13e
TM		 6015 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6016 return 0;
afe6c27c 6017 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 6018 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 6019 switch (err) {
6020 default:
6021 goto out;
6022 case -NFS4ERR_GRACE:
6023 case -NFS4ERR_DELAY:
6024 nfs4_handle_exception(server, err, &exception);
6025 err = 0;
6026 }
202b50dc 6027 } while (exception.retry);
a9ed2e25 6028out:
202b50dc 6029 return err;
1da177e4
LT		 6030}
6031
f062eb6c 6032#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6033/**
6034 * nfs41_check_expired_locks - possibly free a lock stateid
6035 *
6036 * @state: NFSv4 state for an inode
6037 *
6038 * Returns NFS_OK if recovery for this stateid is now finished.
6039 * Otherwise a negative NFS4ERR value is returned.
6040 */
b01dd1d8 6041static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6042{
eb64cf96 6043 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6044 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6045 struct nfs_server *server = NFS_SERVER(state->inode);
6046
b01dd1d8 6047 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6048 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6049 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6050
6051 status = nfs41_test_stateid(server,
6052 &lsp->ls_stateid,
6053 cred);
08cb47fa 6054 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6055 if (status != NFS_OK) {
3e60ffdd
CL		 6056 /* Free the stateid unless the server
6057 * informs us the stateid is unrecognized. */
89af2739
CL		 6058 if (status != -NFS4ERR_BAD_STATEID)
6059 nfs41_free_stateid(server,
ab7cb0df
TM		 6060 &lsp->ls_stateid,
6061 cred);
795a88c9 6062 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6063 ret = status;
6064 }
6065 }
6066 };
6067
6068 return ret;
6069}
6070
6071static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6072{
6073 int status = NFS_OK;
6074
6075 if (test_bit(LK_STATE_IN_USE, &state->flags))
6076 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6077 if (status != NFS_OK)
6078 status = nfs4_lock_expired(state, request);
6079 return status;
f062eb6c
BS		 6080}
6081#endif
6082
1da177e4
LT		 6083static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6084{
19e03c57 6085 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6086 unsigned char fl_flags = request->fl_flags;
8e469ebd 6087 int status = -ENOLCK;
1da177e4 6088
8e469ebd
TM		 6089 if ((fl_flags & FL_POSIX) &&
6090 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6091 goto out;
6bfc93ef 6092 /* Is this a delegated open? */
6bfc93ef
TM		 6093 status = nfs4_set_lock_state(state, request);
6094 if (status != 0)
6095 goto out;
01c3b861 6096 request->fl_flags |= FL_ACCESS;
83bfff23 6097 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6098 if (status < 0)
6099 goto out;
19e03c57 6100 down_read(&nfsi->rwsem);
01c3b861 6101 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6102 /* Yes: cache locks! */
01c3b861 6103 /* ...but avoid races with delegation recall... */
19e03c57 6104 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6105 status = do_vfs_lock(state->inode, request);
c69899a1 6106 up_read(&nfsi->rwsem);
9a99af49 6107 goto out;
9a99af49 6108 }
19e03c57 6109 up_read(&nfsi->rwsem);
c69899a1 6110 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6111out:
6112 request->fl_flags = fl_flags;
1da177e4
LT		 6113 return status;
6114}
6115
6116static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6117{
a1d0b5ee
TM		 6118 struct nfs4_exception exception = {
6119 .state = state,
05ffe24f 6120 .inode = state->inode,
a1d0b5ee 6121 };
1da177e4
LT		 6122 int err;
6123
6124 do {
965b5d67 6125 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6126 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6127 if (err == -NFS4ERR_DENIED)
6128 err = -EAGAIN;
1da177e4 6129 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6130 err, &exception);
1da177e4
LT		 6131 } while (exception.retry);
6132 return err;
6133}
6134
6135static int
6136nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6137{
6138 struct nfs_open_context *ctx;
6139 struct nfs4_state *state;
6140 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6141 int status;
6142
6143 /* verify open state */
cd3758e3 6144 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6145 state = ctx->state;
6146
6147 if (request->fl_start < 0 || request->fl_end < 0)
6148 return -EINVAL;
6149
d953126a
TM		 6150 if (IS_GETLK(cmd)) {
6151 if (state != NULL)
6152 return nfs4_proc_getlk(state, F_GETLK, request);
6153 return 0;
6154 }
1da177e4
LT		 6155
6156 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6157 return -EINVAL;
6158
d953126a
TM		 6159 if (request->fl_type == F_UNLCK) {
6160 if (state != NULL)
6161 return nfs4_proc_unlck(state, cmd, request);
6162 return 0;
6163 }
1da177e4 6164
d953126a
TM		 6165 if (state == NULL)
6166 return -ENOLCK;
55725513
TM		 6167 /*
6168 * Don't rely on the VFS having checked the file open mode,
6169 * since it won't do this for flock() locks.
6170 */
f44106e2 6171 switch (request->fl_type) {
55725513
TM		 6172 case F_RDLCK:
6173 if (!(filp->f_mode & FMODE_READ))
6174 return -EBADF;
6175 break;
6176 case F_WRLCK:
6177 if (!(filp->f_mode & FMODE_WRITE))
6178 return -EBADF;
6179 }
6180
1da177e4
LT		 6181 do {
6182 status = nfs4_proc_setlk(state, cmd, request);
6183 if ((status != -EAGAIN) || IS_SETLK(cmd))
6184 break;
6185 timeout = nfs4_set_lock_task_retry(timeout);
6186 status = -ERESTARTSYS;
6187 if (signalled())
6188 break;
6189 } while(status < 0);
1da177e4
LT		 6190 return status;
6191}
6192
db4f2e63 6193int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6194{
6195 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6196 int err;
6197
6198 err = nfs4_set_lock_state(state, fl);
6199 if (err != 0)
db4f2e63 6200 return err;
4a706fa0 6201 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6202 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6203}
6b3b5496 6204
cf470c3e
TM		 6205struct nfs_release_lockowner_data {
6206 struct nfs4_lock_state *lsp;
5ae67c4f 6207 struct nfs_server *server;
cf470c3e 6208 struct nfs_release_lockowner_args args;
b7e63a10 6209 struct nfs_release_lockowner_res res;
60ea6812 6210 unsigned long timestamp;
cf470c3e
TM		 6211};
6212
fbd4bfd1
CL		 6213static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6214{
6215 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6216 struct nfs_server *server = data->server;
cb04ad2a
PT		 6217 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6218 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6219 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6220 data->timestamp = jiffies;
fbd4bfd1
CL		 6221}
6222
6223static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6224{
6225 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6226 struct nfs_server *server = data->server;
6227
b7e63a10 6228 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6229
6230 switch (task->tk_status) {
6231 case 0:
6232 renew_lease(server, data->timestamp);
6233 break;
6234 case -NFS4ERR_STALE_CLIENTID:
6235 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6236 nfs4_schedule_lease_recovery(server->nfs_client);
6237 break;
60ea6812
CL		 6238 case -NFS4ERR_LEASE_MOVED:
6239 case -NFS4ERR_DELAY:
8478eaa1
N		 6240 if (nfs4_async_handle_error(task, server,
6241 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6242 rpc_restart_call_prepare(task);
6243 }
fbd4bfd1
CL		 6244}
6245
d3c7b7cc
TM		 6246static void nfs4_release_lockowner_release(void *calldata)
6247{
cf470c3e 6248 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6249 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6250 kfree(calldata);
6251}
6252
17280175 6253static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6254 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6255 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6256 .rpc_release = nfs4_release_lockowner_release,
6257};
6258
f1cdae87
JL		 6259static void
6260nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6261{
cf470c3e 6262 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6263 struct rpc_message msg = {
6264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6265 };
6266
6267 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6268 return;
fbd4bfd1 6269
cf470c3e
TM		 6270 data = kmalloc(sizeof(*data), GFP_NOFS);
6271 if (!data)
f1cdae87 6272 return;
cf470c3e 6273 data->lsp = lsp;
5ae67c4f 6274 data->server = server;
cf470c3e
TM		 6275 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6276 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6277 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6278
cf470c3e 6279 msg.rpc_argp = &data->args;
b7e63a10
TM		 6280 msg.rpc_resp = &data->res;
6281 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6282 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6283}
6284
aa1870af
BF		 6285#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6286
64c2ce8b
AK		 6287static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6288 const void *buf, size_t buflen,
6289 int flags, int type)
6b3b5496 6290{
64c2ce8b
AK		 6291 if (strcmp(key, "") != 0)
6292 return -EINVAL;
4b580ee3 6293
2b0143b5 6294 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6295}
6296
64c2ce8b
AK		 6297static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6298 void *buf, size_t buflen, int type)
6b3b5496 6299{
64c2ce8b
AK		 6300 if (strcmp(key, "") != 0)
6301 return -EINVAL;
aa1870af 6302
2b0143b5 6303 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6304}
6305
64c2ce8b
AK		 6306static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6307 size_t list_len, const char *name,
6308 size_t name_len, int type)
6b3b5496 6309{
64c2ce8b 6310 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6311
2b0143b5 6312 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6313 return 0;
64c2ce8b
AK		 6314
6315 if (list && len <= list_len)
6316 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6317 return len;
6b3b5496
BF		 6318}
6319
c9bccef6
DQ		 6320#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6321static inline int nfs4_server_supports_labels(struct nfs_server *server)
6322{
6323 return server->caps & NFS_CAP_SECURITY_LABEL;
6324}
6325
6326static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6327 const void *buf, size_t buflen,
6328 int flags, int type)
6329{
6330 if (security_ismaclabel(key))
6331 return nfs4_set_security_label(dentry, buf, buflen);
6332
6333 return -EOPNOTSUPP;
6334}
6335
6336static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6337 void *buf, size_t buflen, int type)
6338{
6339 if (security_ismaclabel(key))
2b0143b5 6340 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6341 return -EOPNOTSUPP;
6342}
6343
6344static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6345 size_t list_len, const char *name,
6346 size_t name_len, int type)
6347{
6348 size_t len = 0;
6349
2b0143b5
DH		 6350 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6351 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6352 if (list && len <= list_len)
2b0143b5 6353 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6354 }
6355 return len;
6356}
6357
6358static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6359 .prefix = XATTR_SECURITY_PREFIX,
6360 .list = nfs4_xattr_list_nfs4_label,
6361 .get = nfs4_xattr_get_nfs4_label,
6362 .set = nfs4_xattr_set_nfs4_label,
6363};
6364#endif
6365
6366
533eb461
AA		 6367/*
6368 * nfs_fhget will use either the mounted_on_fileid or the fileid
6369 */
69aaaae1
TM		 6370static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6371{
533eb461
AA		 6372 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6373 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6374 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6375 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6376 return;
6377
6378 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6379 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6380 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6381 fattr->nlink = 2;
6382}
6383
f05d147f
BS		 6384static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6385 const struct qstr *name,
6386 struct nfs4_fs_locations *fs_locations,
6387 struct page *page)
683b57b4
TM		 6388{
6389 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6390 u32 bitmask[3] = {
361e624f 6391 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6392 };
6393 struct nfs4_fs_locations_arg args = {
6394 .dir_fh = NFS_FH(dir),
c228fd3a 6395 .name = name,
683b57b4
TM		 6396 .page = page,
6397 .bitmask = bitmask,
6398 };
22958463
BH		 6399 struct nfs4_fs_locations_res res = {
6400 .fs_locations = fs_locations,
6401 };
683b57b4
TM		 6402 struct rpc_message msg = {
6403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6404 .rpc_argp = &args,
22958463 6405 .rpc_resp = &res,
683b57b4
TM		 6406 };
6407 int status;
6408
3110ff80 6409 dprintk("%s: start\n", __func__);
533eb461
AA		 6410
6411 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6412 * is not supported */
6413 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6414 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6415 else
6416 bitmask[0] |= FATTR4_WORD0_FILEID;
6417
c228fd3a 6418 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6419 fs_locations->server = server;
830b8e33 6420 fs_locations->nlocations = 0;
f05d147f 6421 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6422 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6423 return status;
6424}
6425
f05d147f
BS		 6426int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6427 const struct qstr *name,
6428 struct nfs4_fs_locations *fs_locations,
6429 struct page *page)
db0a9593
BS		 6430{
6431 struct nfs4_exception exception = { };
6432 int err;
6433 do {
078ea3df
TM		 6434 err = _nfs4_proc_fs_locations(client, dir, name,
6435 fs_locations, page);
6436 trace_nfs4_get_fs_locations(dir, name, err);
6437 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6438 &exception);
6439 } while (exception.retry);
6440 return err;
6441}
6442
b03d735b
CL		 6443/*
6444 * This operation also signals the server that this client is
6445 * performing migration recovery. The server can stop returning
6446 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6447 * appended to this compound to identify the client ID which is
6448 * performing recovery.
6449 */
6450static int _nfs40_proc_get_locations(struct inode *inode,
6451 struct nfs4_fs_locations *locations,
6452 struct page *page, struct rpc_cred *cred)
6453{
6454 struct nfs_server *server = NFS_SERVER(inode);
6455 struct rpc_clnt *clnt = server->client;
6456 u32 bitmask[2] = {
6457 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6458 };
6459 struct nfs4_fs_locations_arg args = {
6460 .clientid = server->nfs_client->cl_clientid,
6461 .fh = NFS_FH(inode),
6462 .page = page,
6463 .bitmask = bitmask,
6464 .migration = 1, /* skip LOOKUP */
6465 .renew = 1, /* append RENEW */
6466 };
6467 struct nfs4_fs_locations_res res = {
6468 .fs_locations = locations,
6469 .migration = 1,
6470 .renew = 1,
6471 };
6472 struct rpc_message msg = {
6473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6474 .rpc_argp = &args,
6475 .rpc_resp = &res,
6476 .rpc_cred = cred,
6477 };
6478 unsigned long now = jiffies;
6479 int status;
6480
6481 nfs_fattr_init(&locations->fattr);
6482 locations->server = server;
6483 locations->nlocations = 0;
6484
6485 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6486 nfs4_set_sequence_privileged(&args.seq_args);
6487 status = nfs4_call_sync_sequence(clnt, server, &msg,
6488 &args.seq_args, &res.seq_res);
6489 if (status)
6490 return status;
6491
6492 renew_lease(server, now);
6493 return 0;
6494}
6495
6496#ifdef CONFIG_NFS_V4_1
6497
6498/*
6499 * This operation also signals the server that this client is
6500 * performing migration recovery. The server can stop asserting
6501 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6502 * performing this operation is identified in the SEQUENCE
6503 * operation in this compound.
6504 *
6505 * When the client supports GETATTR(fs_locations_info), it can
6506 * be plumbed in here.
6507 */
6508static int _nfs41_proc_get_locations(struct inode *inode,
6509 struct nfs4_fs_locations *locations,
6510 struct page *page, struct rpc_cred *cred)
6511{
6512 struct nfs_server *server = NFS_SERVER(inode);
6513 struct rpc_clnt *clnt = server->client;
6514 u32 bitmask[2] = {
6515 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6516 };
6517 struct nfs4_fs_locations_arg args = {
6518 .fh = NFS_FH(inode),
6519 .page = page,
6520 .bitmask = bitmask,
6521 .migration = 1, /* skip LOOKUP */
6522 };
6523 struct nfs4_fs_locations_res res = {
6524 .fs_locations = locations,
6525 .migration = 1,
6526 };
6527 struct rpc_message msg = {
6528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6529 .rpc_argp = &args,
6530 .rpc_resp = &res,
6531 .rpc_cred = cred,
6532 };
6533 int status;
6534
6535 nfs_fattr_init(&locations->fattr);
6536 locations->server = server;
6537 locations->nlocations = 0;
6538
6539 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6540 nfs4_set_sequence_privileged(&args.seq_args);
6541 status = nfs4_call_sync_sequence(clnt, server, &msg,
6542 &args.seq_args, &res.seq_res);
6543 if (status == NFS4_OK &&
6544 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6545 status = -NFS4ERR_LEASE_MOVED;
6546 return status;
6547}
6548
6549#endif /* CONFIG_NFS_V4_1 */
6550
6551/**
6552 * nfs4_proc_get_locations - discover locations for a migrated FSID
6553 * @inode: inode on FSID that is migrating
6554 * @locations: result of query
6555 * @page: buffer
6556 * @cred: credential to use for this operation
6557 *
6558 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6559 * operation failed, or a negative errno if a local error occurred.
6560 *
6561 * On success, "locations" is filled in, but if the server has
6562 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6563 * asserted.
6564 *
6565 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6566 * from this client that require migration recovery.
6567 */
6568int nfs4_proc_get_locations(struct inode *inode,
6569 struct nfs4_fs_locations *locations,
6570 struct page *page, struct rpc_cred *cred)
6571{
6572 struct nfs_server *server = NFS_SERVER(inode);
6573 struct nfs_client *clp = server->nfs_client;
6574 const struct nfs4_mig_recovery_ops *ops =
6575 clp->cl_mvops->mig_recovery_ops;
6576 struct nfs4_exception exception = { };
6577 int status;
6578
6579 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6580 (unsigned long long)server->fsid.major,
6581 (unsigned long long)server->fsid.minor,
6582 clp->cl_hostname);
6583 nfs_display_fhandle(NFS_FH(inode), __func__);
6584
6585 do {
6586 status = ops->get_locations(inode, locations, page, cred);
6587 if (status != -NFS4ERR_DELAY)
6588 break;
6589 nfs4_handle_exception(server, status, &exception);
6590 } while (exception.retry);
6591 return status;
6592}
6593
44c99933
CL		 6594/*
6595 * This operation also signals the server that this client is
6596 * performing "lease moved" recovery. The server can stop
6597 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6598 * is appended to this compound to identify the client ID which is
6599 * performing recovery.
6600 */
6601static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6602{
6603 struct nfs_server *server = NFS_SERVER(inode);
6604 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6605 struct rpc_clnt *clnt = server->client;
6606 struct nfs4_fsid_present_arg args = {
6607 .fh = NFS_FH(inode),
6608 .clientid = clp->cl_clientid,
6609 .renew = 1, /* append RENEW */
6610 };
6611 struct nfs4_fsid_present_res res = {
6612 .renew = 1,
6613 };
6614 struct rpc_message msg = {
6615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6616 .rpc_argp = &args,
6617 .rpc_resp = &res,
6618 .rpc_cred = cred,
6619 };
6620 unsigned long now = jiffies;
6621 int status;
6622
6623 res.fh = nfs_alloc_fhandle();
6624 if (res.fh == NULL)
6625 return -ENOMEM;
6626
6627 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6628 nfs4_set_sequence_privileged(&args.seq_args);
6629 status = nfs4_call_sync_sequence(clnt, server, &msg,
6630 &args.seq_args, &res.seq_res);
6631 nfs_free_fhandle(res.fh);
6632 if (status)
6633 return status;
6634
6635 do_renew_lease(clp, now);
6636 return 0;
6637}
6638
6639#ifdef CONFIG_NFS_V4_1
6640
6641/*
6642 * This operation also signals the server that this client is
6643 * performing "lease moved" recovery. The server can stop asserting
6644 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6645 * this operation is identified in the SEQUENCE operation in this
6646 * compound.
6647 */
6648static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6649{
6650 struct nfs_server *server = NFS_SERVER(inode);
6651 struct rpc_clnt *clnt = server->client;
6652 struct nfs4_fsid_present_arg args = {
6653 .fh = NFS_FH(inode),
6654 };
6655 struct nfs4_fsid_present_res res = {
6656 };
6657 struct rpc_message msg = {
6658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6659 .rpc_argp = &args,
6660 .rpc_resp = &res,
6661 .rpc_cred = cred,
6662 };
6663 int status;
6664
6665 res.fh = nfs_alloc_fhandle();
6666 if (res.fh == NULL)
6667 return -ENOMEM;
6668
6669 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6670 nfs4_set_sequence_privileged(&args.seq_args);
6671 status = nfs4_call_sync_sequence(clnt, server, &msg,
6672 &args.seq_args, &res.seq_res);
6673 nfs_free_fhandle(res.fh);
6674 if (status == NFS4_OK &&
6675 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6676 status = -NFS4ERR_LEASE_MOVED;
6677 return status;
6678}
6679
6680#endif /* CONFIG_NFS_V4_1 */
6681
6682/**
6683 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6684 * @inode: inode on FSID to check
6685 * @cred: credential to use for this operation
6686 *
6687 * Server indicates whether the FSID is present, moved, or not
6688 * recognized. This operation is necessary to clear a LEASE_MOVED
6689 * condition for this client ID.
6690 *
6691 * Returns NFS4_OK if the FSID is present on this server,
6692 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6693 * NFS4ERR code if some error occurred on the server, or a
6694 * negative errno if a local failure occurred.
6695 */
6696int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6697{
6698 struct nfs_server *server = NFS_SERVER(inode);
6699 struct nfs_client *clp = server->nfs_client;
6700 const struct nfs4_mig_recovery_ops *ops =
6701 clp->cl_mvops->mig_recovery_ops;
6702 struct nfs4_exception exception = { };
6703 int status;
6704
6705 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6706 (unsigned long long)server->fsid.major,
6707 (unsigned long long)server->fsid.minor,
6708 clp->cl_hostname);
6709 nfs_display_fhandle(NFS_FH(inode), __func__);
6710
6711 do {
6712 status = ops->fsid_present(inode, cred);
6713 if (status != -NFS4ERR_DELAY)
6714 break;
6715 nfs4_handle_exception(server, status, &exception);
6716 } while (exception.retry);
6717 return status;
6718}
6719
5ec16a85 6720/**
a5250def
WAA		 6721 * If 'use_integrity' is true and the state managment nfs_client
6722 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6723 * and the machine credential as per RFC3530bis and RFC5661 Security
6724 * Considerations sections. Otherwise, just use the user cred with the
6725 * filesystem's rpc_client.
5ec16a85 6726 */
a5250def 6727static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6728{
6729 int status;
6730 struct nfs4_secinfo_arg args = {
6731 .dir_fh = NFS_FH(dir),
6732 .name = name,
6733 };
6734 struct nfs4_secinfo_res res = {
6735 .flavors = flavors,
6736 };
6737 struct rpc_message msg = {
6738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6739 .rpc_argp = &args,
6740 .rpc_resp = &res,
6741 };
a5250def 6742 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6743 struct rpc_cred *cred = NULL;
a5250def
WAA		 6744
6745 if (use_integrity) {
6746 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6747 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6748 msg.rpc_cred = cred;
a5250def 6749 }
5a5ea0d4
BS		 6750
6751 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6752
6753 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6754 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6755
a5250def
WAA		 6756 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6757 &res.seq_res, 0);
5a5ea0d4 6758 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6759
7cb852df
WAA		 6760 if (cred)
6761 put_rpccred(cred);
a5250def 6762
5a5ea0d4
BS		 6763 return status;
6764}
6765
72de53ec
BS		 6766int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6767 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6768{
6769 struct nfs4_exception exception = { };
6770 int err;
6771 do {
a5250def
WAA		 6772 err = -NFS4ERR_WRONGSEC;
6773
6774 /* try to use integrity protection with machine cred */
6775 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6776 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6777
6778 /*
6779 * if unable to use integrity protection, or SECINFO with
6780 * integrity protection returns NFS4ERR_WRONGSEC (which is
6781 * disallowed by spec, but exists in deployed servers) use
6782 * the current filesystem's rpc_client and the user cred.
6783 */
6784 if (err == -NFS4ERR_WRONGSEC)
6785 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6786
078ea3df
TM		 6787 trace_nfs4_secinfo(dir, name, err);
6788 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6789 &exception);
6790 } while (exception.retry);
6791 return err;
6792}
6793
557134a3 6794#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6795/*
6796 * Check the exchange flags returned by the server for invalid flags, having
6797 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6798 * DS flags set.
6799 */
6800static int nfs4_check_cl_exchange_flags(u32 flags)
6801{
6802 if (flags & ~EXCHGID4_FLAG_MASK_R)
6803 goto out_inval;
6804 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6805 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6806 goto out_inval;
6807 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6808 goto out_inval;
6809 return NFS_OK;
6810out_inval:
6811 return -NFS4ERR_INVAL;
6812}
6813
78fe0f41 6814static bool
79d4e1f0
CL		 6815nfs41_same_server_scope(struct nfs41_server_scope *a,
6816 struct nfs41_server_scope *b)
78fe0f41
WAA		 6817{
6818 if (a->server_scope_sz == b->server_scope_sz &&
6819 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6820 return true;
6821
6822 return false;
6823}
6824
7c44f1ae
WAA		 6825/*
6826 * nfs4_proc_bind_conn_to_session()
6827 *
6828 * The 4.1 client currently uses the same TCP connection for the
6829 * fore and backchannel.
6830 */
2cf047c9 6831int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6832{
6833 int status;
71a097c6
TM		 6834 struct nfs41_bind_conn_to_session_args args = {
6835 .client = clp,
6836 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6837 };
7c44f1ae
WAA		 6838 struct nfs41_bind_conn_to_session_res res;
6839 struct rpc_message msg = {
6840 .rpc_proc =
6841 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6842 .rpc_argp = &args,
7c44f1ae 6843 .rpc_resp = &res,
2cf047c9 6844 .rpc_cred = cred,
7c44f1ae
WAA		 6845 };
6846
6847 dprintk("--> %s\n", __func__);
7c44f1ae 6848
71a097c6
TM		 6849 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6850 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6851 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6852
6853 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6854 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6855 if (status == 0) {
71a097c6 6856 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6857 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6858 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6859 status = -EIO;
71a097c6 6860 goto out;
7c44f1ae 6861 }
71a097c6 6862 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6863 dprintk("NFS: %s: Unexpected direction from server\n",
6864 __func__);
6865 status = -EIO;
71a097c6 6866 goto out;
7c44f1ae 6867 }
71a097c6 6868 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6869 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6870 __func__);
6871 status = -EIO;
71a097c6 6872 goto out;
7c44f1ae
WAA		 6873 }
6874 }
7c44f1ae
WAA		 6875out:
6876 dprintk("<-- %s status= %d\n", __func__, status);
6877 return status;
6878}
6879
99fe60d0 6880/*
fa940720
WAA		 6881 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6882 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6883 */
6884static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6885 .how = SP4_MACH_CRED,
6886 .enforce.u.words = {
6887 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6888 1 << (OP_EXCHANGE_ID - 32) |
6889 1 << (OP_CREATE_SESSION - 32) |
6890 1 << (OP_DESTROY_SESSION - 32) |
6891 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6892 },
6893 .allow.u.words = {
6894 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6895 1 << (OP_LOCKU) |
6896 1 << (OP_COMMIT),
8b5bee2e 6897 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6898 1 << (OP_SECINFO_NO_NAME - 32) |
6899 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6900 1 << (OP_FREE_STATEID - 32) |
6901 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6902 }
6903};
6904
6905/*
6906 * Select the state protection mode for client `clp' given the server results
6907 * from exchange_id in `sp'.
99fe60d0 6908 *
2031cd1a
WAA		 6909 * Returns 0 on success, negative errno otherwise.
6910 */
6911static int nfs4_sp4_select_mode(struct nfs_client *clp,
6912 struct nfs41_state_protection *sp)
6913{
6914 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6915 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6916 1 << (OP_EXCHANGE_ID - 32) |
6917 1 << (OP_CREATE_SESSION - 32) |
6918 1 << (OP_DESTROY_SESSION - 32) |
6919 1 << (OP_DESTROY_CLIENTID - 32)
6920 };
6921 unsigned int i;
6922
6923 if (sp->how == SP4_MACH_CRED) {
6924 /* Print state protect result */
6925 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6926 for (i = 0; i <= LAST_NFS4_OP; i++) {
6927 if (test_bit(i, sp->enforce.u.longs))
6928 dfprintk(MOUNT, " enforce op %d\n", i);
6929 if (test_bit(i, sp->allow.u.longs))
6930 dfprintk(MOUNT, " allow op %d\n", i);
6931 }
6932
6933 /* make sure nothing is on enforce list that isn't supported */
6934 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6935 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6936 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6937 return -EINVAL;
6938 }
6939 }
6940
6941 /*
6942 * Minimal mode - state operations are allowed to use machine
6943 * credential. Note this already happens by default, so the
6944 * client doesn't have to do anything more than the negotiation.
6945 *
6946 * NOTE: we don't care if EXCHANGE_ID is in the list -
6947 * we're already using the machine cred for exchange_id
6948 * and will never use a different cred.
6949 */
6950 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6951 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6952 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6953 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6954 dfprintk(MOUNT, "sp4_mach_cred:\n");
6955 dfprintk(MOUNT, " minimal mode enabled\n");
6956 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6957 } else {
6958 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6959 return -EINVAL;
6960 }
fa940720
WAA		 6961
6962 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6963 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6964 dfprintk(MOUNT, " cleanup mode enabled\n");
6965 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6966 }
8b5bee2e
WAA		 6967
6968 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6969 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6970 dfprintk(MOUNT, " secinfo mode enabled\n");
6971 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6972 }
3787d506
WAA		 6973
6974 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6975 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6976 dfprintk(MOUNT, " stateid mode enabled\n");
6977 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6978 }
8c21c62c
WAA		 6979
6980 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6981 dfprintk(MOUNT, " write mode enabled\n");
6982 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6983 }
6984
6985 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6986 dfprintk(MOUNT, " commit mode enabled\n");
6987 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6988 }
2031cd1a
WAA		 6989 }
6990
6991 return 0;
6992}
6993
6994/*
6995 * _nfs4_proc_exchange_id()
6bbb4ae8 6996 *
2031cd1a 6997 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6998 */
2031cd1a
WAA		 6999static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7000 u32 sp4_how)
99fe60d0
BH		 7001{
7002 nfs4_verifier verifier;
7003 struct nfs41_exchange_id_args args = {
cd93710e 7004 .verifier = &verifier,
99fe60d0 7005 .client = clp,
cd3fadec 7006#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7007 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7008 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7009 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7010#else
7011 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7012 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7013#endif
99fe60d0
BH		 7014 };
7015 struct nfs41_exchange_id_res res = {
32b01310 7016 0
99fe60d0
BH		 7017 };
7018 int status;
7019 struct rpc_message msg = {
7020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7021 .rpc_argp = &args,
7022 .rpc_resp = &res,
7023 .rpc_cred = cred,
7024 };
99fe60d0 7025
f092075d 7026 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7027
7028 status = nfs4_init_uniform_client_string(clp);
7029 if (status)
3a6bb738 7030 goto out;
3a6bb738
JL		 7031
7032 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7033 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7034 clp->cl_owner_id);
99fe60d0 7035
acdeb69d 7036 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7037 GFP_NOFS);
acdeb69d 7038 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7039 status = -ENOMEM;
7040 goto out;
7041 }
78fe0f41 7042
79d4e1f0 7043 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7044 GFP_NOFS);
177313f1 7045 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7046 status = -ENOMEM;
acdeb69d 7047 goto out_server_owner;
abe9a6d5 7048 }
78fe0f41 7049
bbafffd2 7050 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7051 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7052 status = -ENOMEM;
7053 goto out_server_scope;
7054 }
7055
2031cd1a
WAA		 7056 switch (sp4_how) {
7057 case SP4_NONE:
7058 args.state_protect.how = SP4_NONE;
7059 break;
7060
7061 case SP4_MACH_CRED:
7062 args.state_protect = nfs4_sp4_mach_cred_request;
7063 break;
7064
7065 default:
7066 /* unsupported! */
7067 WARN_ON_ONCE(1);
7068 status = -EINVAL;
6b55970b 7069 goto out_impl_id;
2031cd1a
WAA		 7070 }
7071
1bd714f2 7072 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7073 trace_nfs4_exchange_id(clp, status);
177313f1 7074 if (status == 0)
32b01310 7075 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7076
2031cd1a
WAA		 7077 if (status == 0)
7078 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7079
acdeb69d 7080 if (status == 0) {
32b01310 7081 clp->cl_clientid = res.clientid;
e11259f9
TM		 7082 clp->cl_exchange_flags = res.flags;
7083 /* Client ID is not confirmed */
7084 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7085 clear_bit(NFS4_SESSION_ESTABLISHED,
7086 &clp->cl_session->session_state);
32b01310 7087 clp->cl_seqid = res.seqid;
e11259f9 7088 }
32b01310 7089
acdeb69d
CL		 7090 kfree(clp->cl_serverowner);
7091 clp->cl_serverowner = res.server_owner;
7092 res.server_owner = NULL;
78fe0f41 7093
7d2ed9ac 7094 /* use the most recent implementation id */
59155546
CL		 7095 kfree(clp->cl_implid);
7096 clp->cl_implid = res.impl_id;
6b55970b 7097 res.impl_id = NULL;
7d2ed9ac 7098
177313f1 7099 if (clp->cl_serverscope != NULL &&
79d4e1f0 7100 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7101 res.server_scope)) {
7102 dprintk("%s: server_scope mismatch detected\n",
7103 __func__);
7104 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7105 kfree(clp->cl_serverscope);
7106 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7107 }
7108
177313f1 7109 if (clp->cl_serverscope == NULL) {
79d4e1f0 7110 clp->cl_serverscope = res.server_scope;
6b55970b 7111 res.server_scope = NULL;
abe9a6d5 7112 }
6b55970b 7113 }
7d2ed9ac 7114
6b55970b
KM		 7115out_impl_id:
7116 kfree(res.impl_id);
7d2ed9ac 7117out_server_scope:
abe9a6d5 7118 kfree(res.server_scope);
6b55970b
KM		 7119out_server_owner:
7120 kfree(res.server_owner);
abe9a6d5 7121out:
177313f1 7122 if (clp->cl_implid != NULL)
6bbb4ae8 7123 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7124 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7125 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7126 clp->cl_implid->date.seconds,
7127 clp->cl_implid->date.nseconds);
6bbb4ae8 7128 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7129 return status;
7130}
7131
2031cd1a
WAA		 7132/*
7133 * nfs4_proc_exchange_id()
7134 *
7135 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7136 *
7137 * Since the clientid has expired, all compounds using sessions
7138 * associated with the stale clientid will be returning
7139 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7140 * be in some phase of session reset.
7141 *
7142 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7143 */
7144int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7145{
7146 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7147 int status;
7148
7149 /* try SP4_MACH_CRED if krb5i/p */
7150 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7151 authflavor == RPC_AUTH_GSS_KRB5P) {
7152 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7153 if (!status)
7154 return 0;
7155 }
7156
7157 /* try SP4_NONE */
7158 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7159}
7160
66245539
TM		 7161static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7162 struct rpc_cred *cred)
7163{
7164 struct rpc_message msg = {
7165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7166 .rpc_argp = clp,
7167 .rpc_cred = cred,
7168 };
7169 int status;
7170
7171 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7172 trace_nfs4_destroy_clientid(clp, status);
66245539 7173 if (status)
02c67525 7174 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7175 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7176 return status;
7177}
7178
7179static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7180 struct rpc_cred *cred)
7181{
7182 unsigned int loop;
7183 int ret;
7184
7185 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7186 ret = _nfs4_proc_destroy_clientid(clp, cred);
7187 switch (ret) {
7188 case -NFS4ERR_DELAY:
7189 case -NFS4ERR_CLIENTID_BUSY:
7190 ssleep(1);
7191 break;
7192 default:
7193 return ret;
7194 }
7195 }
7196 return 0;
7197}
7198
7199int nfs4_destroy_clientid(struct nfs_client *clp)
7200{
7201 struct rpc_cred *cred;
7202 int ret = 0;
7203
7204 if (clp->cl_mvops->minor_version < 1)
7205 goto out;
7206 if (clp->cl_exchange_flags == 0)
7207 goto out;
05f4c350
CL		 7208 if (clp->cl_preserve_clid)
7209 goto out;
73d8bde5 7210 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7211 ret = nfs4_proc_destroy_clientid(clp, cred);
7212 if (cred)
7213 put_rpccred(cred);
7214 switch (ret) {
7215 case 0:
7216 case -NFS4ERR_STALE_CLIENTID:
7217 clp->cl_exchange_flags = 0;
7218 }
7219out:
7220 return ret;
7221}
7222
2050f0cc
AA		 7223struct nfs4_get_lease_time_data {
7224 struct nfs4_get_lease_time_args *args;
7225 struct nfs4_get_lease_time_res *res;
7226 struct nfs_client *clp;
7227};
7228
7229static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7230 void *calldata)
7231{
2050f0cc
AA		 7232 struct nfs4_get_lease_time_data *data =
7233 (struct nfs4_get_lease_time_data *)calldata;
7234
7235 dprintk("--> %s\n", __func__);
7236 /* just setup sequence, do not trigger session recovery
7237 since we're invoked within one */
d9afbd1b
TM		 7238 nfs41_setup_sequence(data->clp->cl_session,
7239 &data->args->la_seq_args,
7240 &data->res->lr_seq_res,
7241 task);
2050f0cc
AA		 7242 dprintk("<-- %s\n", __func__);
7243}
7244
7245/*
7246 * Called from nfs4_state_manager thread for session setup, so don't recover
7247 * from sequence operation or clientid errors.
7248 */
7249static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7250{
7251 struct nfs4_get_lease_time_data *data =
7252 (struct nfs4_get_lease_time_data *)calldata;
7253
7254 dprintk("--> %s\n", __func__);
14516c3a
TM		 7255 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7256 return;
2050f0cc
AA		 7257 switch (task->tk_status) {
7258 case -NFS4ERR_DELAY:
7259 case -NFS4ERR_GRACE:
7260 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7261 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7262 task->tk_status = 0;
a8a4ae3a
AA		 7263 /* fall through */
7264 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7265 rpc_restart_call_prepare(task);
2050f0cc
AA		 7266 return;
7267 }
2050f0cc
AA		 7268 dprintk("<-- %s\n", __func__);
7269}
7270
17280175 7271static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7272 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7273 .rpc_call_done = nfs4_get_lease_time_done,
7274};
7275
7276int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7277{
7278 struct rpc_task *task;
7279 struct nfs4_get_lease_time_args args;
7280 struct nfs4_get_lease_time_res res = {
7281 .lr_fsinfo = fsinfo,
7282 };
7283 struct nfs4_get_lease_time_data data = {
7284 .args = &args,
7285 .res = &res,
7286 .clp = clp,
7287 };
7288 struct rpc_message msg = {
7289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7290 .rpc_argp = &args,
7291 .rpc_resp = &res,
7292 };
7293 struct rpc_task_setup task_setup = {
7294 .rpc_client = clp->cl_rpcclient,
7295 .rpc_message = &msg,
7296 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7297 .callback_data = &data,
7298 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7299 };
7300 int status;
7301
a9c92d6b 7302 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7303 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7304 dprintk("--> %s\n", __func__);
7305 task = rpc_run_task(&task_setup);
7306
7307 if (IS_ERR(task))
7308 status = PTR_ERR(task);
7309 else {
7310 status = task->tk_status;
7311 rpc_put_task(task);
7312 }
7313 dprintk("<-- %s return %d\n", __func__, status);
7314
7315 return status;
7316}
7317
fc931582
AA		 7318/*
7319 * Initialize the values to be used by the client in CREATE_SESSION
7320 * If nfs4_init_session set the fore channel request and response sizes,
7321 * use them.
7322 *
7323 * Set the back channel max_resp_sz_cached to zero to force the client to
7324 * always set csa_cachethis to FALSE because the current implementation
7325 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7326 */
7327static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7328{
18aad3d5
AA		 7329 unsigned int max_rqst_sz, max_resp_sz;
7330
7331 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7332 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7333
fc931582 7334 /* Fore channel attributes */
18aad3d5
AA		 7335 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7336 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7337 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7338 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7339
7340 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7341 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7342 __func__,
7343 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7344 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7345
7346 /* Back channel attributes */
fc931582
AA		 7347 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7348 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7349 args->bc_attrs.max_resp_sz_cached = 0;
7350 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7351 args->bc_attrs.max_reqs = 1;
7352
7353 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7354 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7355 __func__,
7356 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7357 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7358 args->bc_attrs.max_reqs);
7359}
7360
79969dd1
TM		 7361static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7362 struct nfs41_create_session_res *res)
8d35301d 7363{
43c2e885 7364 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7365 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7366
43c2e885
BF		 7367 if (rcvd->max_resp_sz > sent->max_resp_sz)
7368 return -EINVAL;
7369 /*
7370 * Our requested max_ops is the minimum we need; we're not
7371 * prepared to break up compounds into smaller pieces than that.
7372 * So, no point even trying to continue if the server won't
7373 * cooperate:
7374 */
7375 if (rcvd->max_ops < sent->max_ops)
7376 return -EINVAL;
7377 if (rcvd->max_reqs == 0)
7378 return -EINVAL;
b4b9a0c1
VG		 7379 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7380 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7381 return 0;
8d35301d
AA		 7382}
7383
79969dd1
TM		 7384static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7385 struct nfs41_create_session_res *res)
43c2e885
BF		 7386{
7387 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7388 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7389
b1c0df5f
TM		 7390 if (!(res->flags & SESSION4_BACK_CHAN))
7391 goto out;
43c2e885
BF		 7392 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7393 return -EINVAL;
7394 if (rcvd->max_resp_sz < sent->max_resp_sz)
7395 return -EINVAL;
7396 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7397 return -EINVAL;
7398 /* These would render the backchannel useless: */
b4b9a0c1 7399 if (rcvd->max_ops != sent->max_ops)
43c2e885 7400 return -EINVAL;
b4b9a0c1 7401 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7402 return -EINVAL;
b1c0df5f 7403out:
43c2e885
BF		 7404 return 0;
7405}
8d35301d 7406
8d35301d 7407static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7408 struct nfs41_create_session_res *res)
8d35301d 7409{
43c2e885 7410 int ret;
8d35301d 7411
79969dd1 7412 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7413 if (ret)
7414 return ret;
79969dd1
TM		 7415 return nfs4_verify_back_channel_attrs(args, res);
7416}
7417
7418static void nfs4_update_session(struct nfs4_session *session,
7419 struct nfs41_create_session_res *res)
7420{
7421 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7422 /* Mark client id and session as being confirmed */
7423 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7424 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7425 session->flags = res->flags;
7426 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7427 if (res->flags & SESSION4_BACK_CHAN)
7428 memcpy(&session->bc_attrs, &res->bc_attrs,
7429 sizeof(session->bc_attrs));
8d35301d
AA		 7430}
7431
848f5bda
TM		 7432static int _nfs4_proc_create_session(struct nfs_client *clp,
7433 struct rpc_cred *cred)
fc931582
AA		 7434{
7435 struct nfs4_session *session = clp->cl_session;
7436 struct nfs41_create_session_args args = {
7437 .client = clp,
79969dd1
TM		 7438 .clientid = clp->cl_clientid,
7439 .seqid = clp->cl_seqid,
fc931582
AA		 7440 .cb_program = NFS4_CALLBACK,
7441 };
79969dd1
TM		 7442 struct nfs41_create_session_res res;
7443
fc931582
AA		 7444 struct rpc_message msg = {
7445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7446 .rpc_argp = &args,
7447 .rpc_resp = &res,
848f5bda 7448 .rpc_cred = cred,
fc931582
AA		 7449 };
7450 int status;
7451
7452 nfs4_init_channel_attrs(&args);
0f91421e 7453 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7454
1bd714f2 7455 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7456 trace_nfs4_create_session(clp, status);
fc931582 7457
43095d39 7458 if (!status) {
8d35301d 7459 /* Verify the session's negotiated channel_attrs values */
79969dd1 7460 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7461 /* Increment the clientid slot sequence id */
79969dd1
TM		 7462 if (clp->cl_seqid == res.seqid)
7463 clp->cl_seqid++;
7464 if (status)
7465 goto out;
7466 nfs4_update_session(session, &res);
fc931582 7467 }
79969dd1 7468out:
fc931582
AA		 7469 return status;
7470}
7471
7472/*
7473 * Issues a CREATE_SESSION operation to the server.
7474 * It is the responsibility of the caller to verify the session is
7475 * expired before calling this routine.
7476 */
848f5bda 7477int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7478{
7479 int status;
7480 unsigned *ptr;
fc931582
AA		 7481 struct nfs4_session *session = clp->cl_session;
7482
7483 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7484
848f5bda 7485 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7486 if (status)
7487 goto out;
7488
aacd5537
AA		 7489 /* Init or reset the session slot tables */
7490 status = nfs4_setup_session_slot_tables(session);
7491 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7492 if (status)
7493 goto out;
7494
7495 ptr = (unsigned *)&session->sess_id.data[0];
7496 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7497 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7498out:
7499 dprintk("<-- %s\n", __func__);
7500 return status;
7501}
7502
0f3e66c6
AA		 7503/*
7504 * Issue the over-the-wire RPC DESTROY_SESSION.
7505 * The caller must serialize access to this routine.
7506 */
848f5bda
TM		 7507int nfs4_proc_destroy_session(struct nfs4_session *session,
7508 struct rpc_cred *cred)
0f3e66c6 7509{
848f5bda
TM		 7510 struct rpc_message msg = {
7511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7512 .rpc_argp = session,
7513 .rpc_cred = cred,
7514 };
0f3e66c6 7515 int status = 0;
0f3e66c6
AA		 7516
7517 dprintk("--> nfs4_proc_destroy_session\n");
7518
7519 /* session is still being setup */
e11259f9
TM		 7520 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7521 return 0;
0f3e66c6 7522
1bd714f2 7523 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7524 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7525
7526 if (status)
08106ac7 7527 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7528 "Session has been destroyed regardless...\n", status);
7529
7530 dprintk("<-- nfs4_proc_destroy_session\n");
7531 return status;
7532}
7533
fc01cea9
AA		 7534/*
7535 * Renew the cl_session lease.
7536 */
d5f8d3fe
TM		 7537struct nfs4_sequence_data {
7538 struct nfs_client *clp;
7539 struct nfs4_sequence_args args;
7540 struct nfs4_sequence_res res;
7541};
7542
dc96aef9
AB		 7543static void nfs41_sequence_release(void *data)
7544{
d5f8d3fe
TM		 7545 struct nfs4_sequence_data *calldata = data;
7546 struct nfs_client *clp = calldata->clp;
dc96aef9 7547
7135840f
AB		 7548 if (atomic_read(&clp->cl_count) > 1)
7549 nfs4_schedule_state_renewal(clp);
7550 nfs_put_client(clp);
d5f8d3fe 7551 kfree(calldata);
dc96aef9
AB		 7552}
7553
aa5190d0
TM		 7554static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7555{
7556 switch(task->tk_status) {
7557 case -NFS4ERR_DELAY:
aa5190d0
TM		 7558 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7559 return -EAGAIN;
7560 default:
0400a6b0 7561 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7562 }
7563 return 0;
7564}
7565
dc96aef9 7566static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7567{
d5f8d3fe
TM		 7568 struct nfs4_sequence_data *calldata = data;
7569 struct nfs_client *clp = calldata->clp;
fc01cea9 7570
14516c3a
TM		 7571 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7572 return;
fc01cea9 7573
c6d01c6f 7574 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7575 if (task->tk_status < 0) {
7576 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7577 if (atomic_read(&clp->cl_count) == 1)
7578 goto out;
fc01cea9 7579
aa5190d0
TM		 7580 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7581 rpc_restart_call_prepare(task);
fc01cea9
AA		 7582 return;
7583 }
7584 }
fc01cea9 7585 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7586out:
fc01cea9
AA		 7587 dprintk("<-- %s\n", __func__);
7588}
7589
7590static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7591{
d5f8d3fe
TM		 7592 struct nfs4_sequence_data *calldata = data;
7593 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7594 struct nfs4_sequence_args *args;
7595 struct nfs4_sequence_res *res;
7596
fc01cea9
AA		 7597 args = task->tk_msg.rpc_argp;
7598 res = task->tk_msg.rpc_resp;
7599
d9afbd1b 7600 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7601}
7602
7603static const struct rpc_call_ops nfs41_sequence_ops = {
7604 .rpc_call_done = nfs41_sequence_call_done,
7605 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7606 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7607};
7608
8fe72bac
TM		 7609static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7610 struct rpc_cred *cred,
7611 bool is_privileged)
fc01cea9 7612{
d5f8d3fe 7613 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7614 struct rpc_message msg = {
7615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7616 .rpc_cred = cred,
7617 };
71ac6da9
TM		 7618 struct rpc_task_setup task_setup_data = {
7619 .rpc_client = clp->cl_rpcclient,
7620 .rpc_message = &msg,
8fe72bac 7621 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7622 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7623 };
fc01cea9 7624
7135840f 7625 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7626 return ERR_PTR(-EIO);
dfb4f309 7627 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7628 if (calldata == NULL) {
7135840f 7629 nfs_put_client(clp);
71ac6da9 7630 return ERR_PTR(-ENOMEM);
fc01cea9 7631 }
a9c92d6b 7632 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7633 if (is_privileged)
7634 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7635 msg.rpc_argp = &calldata->args;
7636 msg.rpc_resp = &calldata->res;
7637 calldata->clp = clp;
71ac6da9 7638 task_setup_data.callback_data = calldata;
fc01cea9 7639
71ac6da9
TM		 7640 return rpc_run_task(&task_setup_data);
7641}
7642
2f60ea6b 7643static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7644{
7645 struct rpc_task *task;
7646 int ret = 0;
7647
2f60ea6b 7648 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7649 return -EAGAIN;
8fe72bac 7650 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7651 if (IS_ERR(task))
7652 ret = PTR_ERR(task);
7653 else
bf294b41 7654 rpc_put_task_async(task);
71ac6da9
TM		 7655 dprintk("<-- %s status=%d\n", __func__, ret);
7656 return ret;
7657}
7658
7659static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7660{
7661 struct rpc_task *task;
7662 int ret;
7663
8fe72bac 7664 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7665 if (IS_ERR(task)) {
7666 ret = PTR_ERR(task);
7667 goto out;
7668 }
7669 ret = rpc_wait_for_completion_task(task);
be824167 7670 if (!ret)
71ac6da9
TM		 7671 ret = task->tk_status;
7672 rpc_put_task(task);
7673out:
7674 dprintk("<-- %s status=%d\n", __func__, ret);
7675 return ret;
fc01cea9
AA		 7676}
7677
fce5c838
RL		 7678struct nfs4_reclaim_complete_data {
7679 struct nfs_client *clp;
7680 struct nfs41_reclaim_complete_args arg;
7681 struct nfs41_reclaim_complete_res res;
7682};
7683
7684static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7685{
7686 struct nfs4_reclaim_complete_data *calldata = data;
7687
d9afbd1b
TM		 7688 nfs41_setup_sequence(calldata->clp->cl_session,
7689 &calldata->arg.seq_args,
7690 &calldata->res.seq_res,
7691 task);
fce5c838
RL		 7692}
7693
aa5190d0
TM		 7694static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7695{
7696 switch(task->tk_status) {
7697 case 0:
7698 case -NFS4ERR_COMPLETE_ALREADY:
7699 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7700 break;
7701 case -NFS4ERR_DELAY:
aa5190d0 7702 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7703 /* fall through */
7704 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7705 return -EAGAIN;
7706 default:
0400a6b0 7707 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7708 }
7709 return 0;
7710}
7711
fce5c838
RL		 7712static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7713{
7714 struct nfs4_reclaim_complete_data *calldata = data;
7715 struct nfs_client *clp = calldata->clp;
7716 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7717
7718 dprintk("--> %s\n", __func__);
14516c3a
TM		 7719 if (!nfs41_sequence_done(task, res))
7720 return;
fce5c838 7721
c6d01c6f 7722 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7723 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7724 rpc_restart_call_prepare(task);
7725 return;
7726 }
fce5c838
RL		 7727 dprintk("<-- %s\n", __func__);
7728}
7729
7730static void nfs4_free_reclaim_complete_data(void *data)
7731{
7732 struct nfs4_reclaim_complete_data *calldata = data;
7733
7734 kfree(calldata);
7735}
7736
7737static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7738 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7739 .rpc_call_done = nfs4_reclaim_complete_done,
7740 .rpc_release = nfs4_free_reclaim_complete_data,
7741};
7742
7743/*
7744 * Issue a global reclaim complete.
7745 */
965e9c23
TM		 7746static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7747 struct rpc_cred *cred)
fce5c838
RL		 7748{
7749 struct nfs4_reclaim_complete_data *calldata;
7750 struct rpc_task *task;
7751 struct rpc_message msg = {
7752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7753 .rpc_cred = cred,
fce5c838
RL		 7754 };
7755 struct rpc_task_setup task_setup_data = {
7756 .rpc_client = clp->cl_rpcclient,
7757 .rpc_message = &msg,
7758 .callback_ops = &nfs4_reclaim_complete_call_ops,
7759 .flags = RPC_TASK_ASYNC,
7760 };
7761 int status = -ENOMEM;
7762
7763 dprintk("--> %s\n", __func__);
8535b2be 7764 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7765 if (calldata == NULL)
7766 goto out;
7767 calldata->clp = clp;
7768 calldata->arg.one_fs = 0;
fce5c838 7769
a9c92d6b 7770 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7771 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7772 msg.rpc_argp = &calldata->arg;
7773 msg.rpc_resp = &calldata->res;
7774 task_setup_data.callback_data = calldata;
7775 task = rpc_run_task(&task_setup_data);
acf82b85 7776 if (IS_ERR(task)) {
fce5c838 7777 status = PTR_ERR(task);
acf82b85
DC		 7778 goto out;
7779 }
c34c32ea
AA		 7780 status = nfs4_wait_for_completion_rpc_task(task);
7781 if (status == 0)
7782 status = task->tk_status;
fce5c838 7783 rpc_put_task(task);
acf82b85 7784 return 0;
fce5c838
RL		 7785out:
7786 dprintk("<-- %s status=%d\n", __func__, status);
7787 return status;
7788}
b1f69b75
AA		 7789
7790static void
7791nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7792{
7793 struct nfs4_layoutget *lgp = calldata;
c31663d4 7794 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7795 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7796
7797 dprintk("--> %s\n", __func__);
c31663d4
FI		 7798 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7799 * right now covering the LAYOUTGET we are about to send.
7800 * However, that is not so catastrophic, and there seems
7801 * to be no way to prevent it completely.
7802 */
6ba7db34 7803 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7804 &lgp->res.seq_res, task))
b1f69b75 7805 return;
cf7d63f1
FI		 7806 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7807 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7808 &lgp->args.range,
cf7d63f1
FI		 7809 lgp->args.ctx->state)) {
7810 rpc_exit(task, NFS4_OK);
cf7d63f1 7811 }
b1f69b75
AA		 7812}
7813
7814static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7815{
7816 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7817 struct inode *inode = lgp->args.inode;
7818 struct nfs_server *server = NFS_SERVER(inode);
7819 struct pnfs_layout_hdr *lo;
7820 struct nfs4_state *state = NULL;
ed7e5423 7821 unsigned long timeo, now, giveup;
b1f69b75 7822
ed7e5423 7823 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7824
6ba7db34 7825 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7826 goto out;
b1f69b75
AA		 7827
7828 switch (task->tk_status) {
7829 case 0:
ee314c2a 7830 goto out;
21b874c8
TM		 7831 /*
7832 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7833 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7834 */
7835 case -NFS4ERR_BADLAYOUT:
7836 goto out_overflow;
ed7e5423
BH		 7837 /*
7838 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7839 * (or clients) writing to the same RAID stripe except when
7840 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7841 */
b1f69b75 7842 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7843 if (lgp->args.minlength == 0)
7844 goto out_overflow;
ed7e5423
BH		 7845 /*
7846 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7847 * existing layout before getting a new one).
7848 */
b1f69b75 7849 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7850 timeo = rpc_get_timeout(task->tk_client);
7851 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7852 now = jiffies;
7853 if (time_after(giveup, now)) {
7854 unsigned long delay;
7855
7856 /* Delay for:
7857 * - Not less then NFS4_POLL_RETRY_MIN.
7858 * - One last time a jiffie before we give up
7859 * - exponential backoff (time_now minus start_attempt)
7860 */
7861 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7862 min((giveup - now - 1),
7863 now - lgp->args.timestamp));
7864
7865 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7866 __func__, delay);
7867 rpc_delay(task, delay);
2259f960
TM		 7868 /* Do not call nfs4_async_handle_error() */
7869 goto out_restart;
ed7e5423 7870 }
ee314c2a
TM		 7871 break;
7872 case -NFS4ERR_EXPIRED:
7873 case -NFS4ERR_BAD_STATEID:
7874 spin_lock(&inode->i_lock);
2259f960
TM		 7875 if (nfs4_stateid_match(&lgp->args.stateid,
7876 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7877 spin_unlock(&inode->i_lock);
7878 /* If the open stateid was bad, then recover it. */
7879 state = lgp->args.ctx->state;
2259f960
TM		 7880 break;
7881 }
7882 lo = NFS_I(inode)->layout;
7883 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7884 &lo->plh_stateid)) {
ee314c2a
TM		 7885 LIST_HEAD(head);
7886
defb8460
CH		 7887 /*
7888 * Mark the bad layout state as invalid, then retry
7889 * with the current stateid.
7890 */
8714d46d 7891 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7892 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7893 spin_unlock(&inode->i_lock);
ee314c2a 7894 pnfs_free_lseg_list(&head);
2259f960
TM		 7895 } else
7896 spin_unlock(&inode->i_lock);
7897 goto out_restart;
b1f69b75 7898 }
8478eaa1 7899 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
2259f960 7900 goto out_restart;
ee314c2a 7901out:
b1f69b75 7902 dprintk("<-- %s\n", __func__);
21b874c8 7903 return;
2259f960
TM		 7904out_restart:
7905 task->tk_status = 0;
7906 rpc_restart_call_prepare(task);
7907 return;
21b874c8
TM		 7908out_overflow:
7909 task->tk_status = -EOVERFLOW;
7910 goto out;
b1f69b75
AA		 7911}
7912
8554116e
IK		 7913static size_t max_response_pages(struct nfs_server *server)
7914{
7915 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7916 return nfs_page_array_len(0, max_resp_sz);
7917}
7918
7919static void nfs4_free_pages(struct page **pages, size_t size)
7920{
7921 int i;
7922
7923 if (!pages)
7924 return;
7925
7926 for (i = 0; i < size; i++) {
7927 if (!pages[i])
7928 break;
7929 __free_page(pages[i]);
7930 }
7931 kfree(pages);
7932}
7933
7934static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7935{
7936 struct page **pages;
7937 int i;
7938
7939 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7940 if (!pages) {
7941 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7942 return NULL;
7943 }
7944
7945 for (i = 0; i < size; i++) {
7946 pages[i] = alloc_page(gfp_flags);
7947 if (!pages[i]) {
7948 dprintk("%s: failed to allocate page\n", __func__);
7949 nfs4_free_pages(pages, size);
7950 return NULL;
7951 }
7952 }
7953
7954 return pages;
7955}
7956
b1f69b75
AA		 7957static void nfs4_layoutget_release(void *calldata)
7958{
7959 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7960 struct inode *inode = lgp->args.inode;
7961 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7962 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7963
7964 dprintk("--> %s\n", __func__);
8554116e 7965 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7966 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7967 put_nfs_open_context(lgp->args.ctx);
7968 kfree(calldata);
7969 dprintk("<-- %s\n", __func__);
7970}
7971
7972static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7973 .rpc_call_prepare = nfs4_layoutget_prepare,
7974 .rpc_call_done = nfs4_layoutget_done,
7975 .rpc_release = nfs4_layoutget_release,
7976};
7977
a0b0a6e3
TM		 7978struct pnfs_layout_segment *
7979nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7980{
a47970ff
WAA		 7981 struct inode *inode = lgp->args.inode;
7982 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7983 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7984 struct rpc_task *task;
7985 struct rpc_message msg = {
7986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7987 .rpc_argp = &lgp->args,
7988 .rpc_resp = &lgp->res,
6ab59344 7989 .rpc_cred = lgp->cred,
b1f69b75
AA		 7990 };
7991 struct rpc_task_setup task_setup_data = {
7992 .rpc_client = server->client,
7993 .rpc_message = &msg,
7994 .callback_ops = &nfs4_layoutget_call_ops,
7995 .callback_data = lgp,
7996 .flags = RPC_TASK_ASYNC,
7997 };
a0b0a6e3 7998 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7999 int status = 0;
8000
8001 dprintk("--> %s\n", __func__);
8002
4bd5a980
PT		 8003 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8004 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8005
8554116e
IK		 8006 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8007 if (!lgp->args.layout.pages) {
8008 nfs4_layoutget_release(lgp);
a0b0a6e3 8009 return ERR_PTR(-ENOMEM);
8554116e
IK		 8010 }
8011 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 8012 lgp->args.timestamp = jiffies;
8554116e 8013
35124a09 8014 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8015 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8016 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8017
b1f69b75
AA		 8018 task = rpc_run_task(&task_setup_data);
8019 if (IS_ERR(task))
a0b0a6e3 8020 return ERR_CAST(task);
b1f69b75 8021 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 8022 if (status == 0)
8023 status = task->tk_status;
1037e6ea
TM		 8024 trace_nfs4_layoutget(lgp->args.ctx,
8025 &lgp->args.range,
8026 &lgp->res.range,
8027 status);
085b7a45
WAA		 8028 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8029 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8030 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8031 rpc_put_task(task);
8032 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8033 if (status)
8034 return ERR_PTR(status);
8035 return lseg;
b1f69b75
AA		 8036}
8037
cbe82603
BH		 8038static void
8039nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8040{
8041 struct nfs4_layoutreturn *lrp = calldata;
8042
8043 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8044 nfs41_setup_sequence(lrp->clp->cl_session,
8045 &lrp->args.seq_args,
8046 &lrp->res.seq_res,
8047 task);
cbe82603
BH		 8048}
8049
8050static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8051{
8052 struct nfs4_layoutreturn *lrp = calldata;
8053 struct nfs_server *server;
8054
8055 dprintk("--> %s\n", __func__);
8056
6ba7db34 8057 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8058 return;
8059
8060 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8061 switch (task->tk_status) {
8062 default:
8063 task->tk_status = 0;
8064 case 0:
8065 break;
8066 case -NFS4ERR_DELAY:
8478eaa1 8067 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8068 break;
d00c5d43 8069 rpc_restart_call_prepare(task);
cbe82603
BH		 8070 return;
8071 }
cbe82603
BH		 8072 dprintk("<-- %s\n", __func__);
8073}
8074
8075static void nfs4_layoutreturn_release(void *calldata)
8076{
8077 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8078 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8079 LIST_HEAD(freeme);
cbe82603
BH		 8080
8081 dprintk("--> %s\n", __func__);
849b286f
TM		 8082 spin_lock(&lo->plh_inode->i_lock);
8083 if (lrp->res.lrs_present)
8084 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8085 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8086 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8087 lo->plh_block_lgets--;
8088 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8089 pnfs_free_lseg_list(&freeme);
70c3bd2b 8090 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8091 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8092 kfree(calldata);
8093 dprintk("<-- %s\n", __func__);
8094}
8095
8096static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8097 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8098 .rpc_call_done = nfs4_layoutreturn_done,
8099 .rpc_release = nfs4_layoutreturn_release,
8100};
8101
6c16605d 8102int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8103{
8104 struct rpc_task *task;
8105 struct rpc_message msg = {
8106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8107 .rpc_argp = &lrp->args,
8108 .rpc_resp = &lrp->res,
9556000d 8109 .rpc_cred = lrp->cred,
cbe82603
BH		 8110 };
8111 struct rpc_task_setup task_setup_data = {
1771c577 8112 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8113 .rpc_message = &msg,
8114 .callback_ops = &nfs4_layoutreturn_call_ops,
8115 .callback_data = lrp,
8116 };
6c16605d 8117 int status = 0;
cbe82603
BH		 8118
8119 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8120 if (!sync) {
8121 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8122 if (!lrp->inode) {
8123 nfs4_layoutreturn_release(lrp);
8124 return -EAGAIN;
8125 }
8126 task_setup_data.flags |= RPC_TASK_ASYNC;
8127 }
a9c92d6b 8128 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8129 task = rpc_run_task(&task_setup_data);
8130 if (IS_ERR(task))
8131 return PTR_ERR(task);
5a0ec8ac
TM		 8132 if (sync)
8133 status = task->tk_status;
1037e6ea 8134 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8135 dprintk("<-- %s status=%d\n", __func__, status);
8136 rpc_put_task(task);
8137 return status;
8138}
8139
b1f69b75 8140static int
cd5875fe
TM		 8141_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8142 struct pnfs_device *pdev,
8143 struct rpc_cred *cred)
b1f69b75
AA		 8144{
8145 struct nfs4_getdeviceinfo_args args = {
8146 .pdev = pdev,
4e590803
TM		 8147 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8148 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8149 };
8150 struct nfs4_getdeviceinfo_res res = {
8151 .pdev = pdev,
8152 };
8153 struct rpc_message msg = {
8154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8155 .rpc_argp = &args,
8156 .rpc_resp = &res,
cd5875fe 8157 .rpc_cred = cred,
b1f69b75
AA		 8158 };
8159 int status;
8160
8161 dprintk("--> %s\n", __func__);
7c513058 8162 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8163 if (res.notification & ~args.notify_types)
8164 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8165 if (res.notification != args.notify_types)
8166 pdev->nocache = 1;
4e590803 8167
b1f69b75
AA		 8168 dprintk("<-- %s status=%d\n", __func__, status);
8169
8170 return status;
8171}
8172
cd5875fe
TM		 8173int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8174 struct pnfs_device *pdev,
8175 struct rpc_cred *cred)
b1f69b75
AA		 8176{
8177 struct nfs4_exception exception = { };
8178 int err;
8179
8180 do {
8181 err = nfs4_handle_exception(server,
cd5875fe 8182 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8183 &exception);
8184 } while (exception.retry);
8185 return err;
8186}
8187EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8188
863a3c6c
AA		 8189static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8190{
8191 struct nfs4_layoutcommit_data *data = calldata;
8192 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8193 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8194
d9afbd1b
TM		 8195 nfs41_setup_sequence(session,
8196 &data->args.seq_args,
8197 &data->res.seq_res,
8198 task);
863a3c6c
AA		 8199}
8200
8201static void
8202nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8203{
8204 struct nfs4_layoutcommit_data *data = calldata;
8205 struct nfs_server *server = NFS_SERVER(data->args.inode);
8206
6ba7db34 8207 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8208 return;
8209
8210 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8211 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8212 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8213 case -NFS4ERR_BADLAYOUT: /* no layout */
8214 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8215 task->tk_status = 0;
e59d27e0 8216 case 0:
e59d27e0
TM		 8217 break;
8218 default:
8478eaa1 8219 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8220 rpc_restart_call_prepare(task);
8221 return;
8222 }
8223 }
863a3c6c
AA		 8224}
8225
8226static void nfs4_layoutcommit_release(void *calldata)
8227{
8228 struct nfs4_layoutcommit_data *data = calldata;
8229
db29c089 8230 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8231 nfs_post_op_update_inode_force_wcc(data->args.inode,
8232 data->res.fattr);
863a3c6c 8233 put_rpccred(data->cred);
472e2594 8234 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8235 kfree(data);
8236}
8237
8238static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8239 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8240 .rpc_call_done = nfs4_layoutcommit_done,
8241 .rpc_release = nfs4_layoutcommit_release,
8242};
8243
8244int
ef311537 8245nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8246{
8247 struct rpc_message msg = {
8248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8249 .rpc_argp = &data->args,
8250 .rpc_resp = &data->res,
8251 .rpc_cred = data->cred,
8252 };
8253 struct rpc_task_setup task_setup_data = {
8254 .task = &data->task,
8255 .rpc_client = NFS_CLIENT(data->args.inode),
8256 .rpc_message = &msg,
8257 .callback_ops = &nfs4_layoutcommit_ops,
8258 .callback_data = data,
863a3c6c
AA		 8259 };
8260 struct rpc_task *task;
8261 int status = 0;
8262
b4839ebe
KM		 8263 dprintk("NFS: initiating layoutcommit call. sync %d "
8264 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8265 data->args.lastbytewritten,
8266 data->args.inode->i_ino);
8267
472e2594
TM		 8268 if (!sync) {
8269 data->inode = nfs_igrab_and_active(data->args.inode);
8270 if (data->inode == NULL) {
8271 nfs4_layoutcommit_release(data);
8272 return -EAGAIN;
8273 }
8274 task_setup_data.flags = RPC_TASK_ASYNC;
8275 }
a9c92d6b 8276 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8277 task = rpc_run_task(&task_setup_data);
8278 if (IS_ERR(task))
8279 return PTR_ERR(task);
472e2594
TM		 8280 if (sync)
8281 status = task->tk_status;
1037e6ea 8282 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8283 dprintk("%s: status %d\n", __func__, status);
8284 rpc_put_task(task);
8285 return status;
8286}
fca78d6d 8287
97431204
AA		 8288/**
8289 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8290 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8291 */
fca78d6d
BS		 8292static int
8293_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8294 struct nfs_fsinfo *info,
8295 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8296{
8297 struct nfs41_secinfo_no_name_args args = {
8298 .style = SECINFO_STYLE_CURRENT_FH,
8299 };
8300 struct nfs4_secinfo_res res = {
8301 .flavors = flavors,
8302 };
8303 struct rpc_message msg = {
8304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8305 .rpc_argp = &args,
8306 .rpc_resp = &res,
8307 };
b1b3e136 8308 struct rpc_clnt *clnt = server->client;
7cb852df 8309 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8310 int status;
8311
8312 if (use_integrity) {
8313 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8314 cred = nfs4_get_clid_cred(server->nfs_client);
8315 msg.rpc_cred = cred;
b1b3e136
WAA		 8316 }
8317
8318 dprintk("--> %s\n", __func__);
8319 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8320 &res.seq_res, 0);
8321 dprintk("<-- %s status=%d\n", __func__, status);
8322
7cb852df
WAA		 8323 if (cred)
8324 put_rpccred(cred);
b1b3e136
WAA		 8325
8326 return status;
fca78d6d
BS		 8327}
8328
8329static int
8330nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8331 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8332{
8333 struct nfs4_exception exception = { };
8334 int err;
8335 do {
b1b3e136
WAA		 8336 /* first try using integrity protection */
8337 err = -NFS4ERR_WRONGSEC;
8338
8339 /* try to use integrity protection with machine cred */
8340 if (_nfs4_is_integrity_protected(server->nfs_client))
8341 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8342 flavors, true);
8343
8344 /*
8345 * if unable to use integrity protection, or SECINFO with
8346 * integrity protection returns NFS4ERR_WRONGSEC (which is
8347 * disallowed by spec, but exists in deployed servers) use
8348 * the current filesystem's rpc_client and the user cred.
8349 */
8350 if (err == -NFS4ERR_WRONGSEC)
8351 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8352 flavors, false);
8353
fca78d6d
BS		 8354 switch (err) {
8355 case 0:
8356 case -NFS4ERR_WRONGSEC:
78b19bae 8357 case -ENOTSUPP:
05e9cfb4 8358 goto out;
fca78d6d
BS		 8359 default:
8360 err = nfs4_handle_exception(server, err, &exception);
8361 }
8362 } while (exception.retry);
05e9cfb4 8363out:
fca78d6d
BS		 8364 return err;
8365}
8366
8367static int
8368nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8369 struct nfs_fsinfo *info)
8370{
8371 int err;
8372 struct page *page;
367156d9 8373 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8374 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8375 struct nfs4_secinfo4 *secinfo;
8376 int i;
fca78d6d
BS		 8377
8378 page = alloc_page(GFP_KERNEL);
8379 if (!page) {
8380 err = -ENOMEM;
8381 goto out;
8382 }
8383
8384 flavors = page_address(page);
8385 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8386
8387 /*
8388 * Fall back on "guess and check" method if
8389 * the server doesn't support SECINFO_NO_NAME
8390 */
78b19bae 8391 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8392 err = nfs4_find_root_sec(server, fhandle, info);
8393 goto out_freepage;
8394 }
8395 if (err)
8396 goto out_freepage;
8397
58a8cf12
WAA		 8398 for (i = 0; i < flavors->num_flavors; i++) {
8399 secinfo = &flavors->flavors[i];
8400
8401 switch (secinfo->flavor) {
8402 case RPC_AUTH_NULL:
8403 case RPC_AUTH_UNIX:
8404 case RPC_AUTH_GSS:
8405 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8406 &secinfo->flavor_info);
8407 break;
8408 default:
8409 flavor = RPC_AUTH_MAXFLAVOR;
8410 break;
8411 }
8412
4d4b69dd
WAA		 8413 if (!nfs_auth_info_match(&server->auth_info, flavor))
8414 flavor = RPC_AUTH_MAXFLAVOR;
8415
58a8cf12
WAA		 8416 if (flavor != RPC_AUTH_MAXFLAVOR) {
8417 err = nfs4_lookup_root_sec(server, fhandle,
8418 info, flavor);
8419 if (!err)
8420 break;
8421 }
8422 }
8423
8424 if (flavor == RPC_AUTH_MAXFLAVOR)
8425 err = -EPERM;
fca78d6d
BS		 8426
8427out_freepage:
8428 put_page(page);
8429 if (err == -EACCES)
8430 return -EPERM;
8431out:
8432 return err;
8433}
1cab0652 8434
ab7cb0df
TM		 8435static int _nfs41_test_stateid(struct nfs_server *server,
8436 nfs4_stateid *stateid,
8437 struct rpc_cred *cred)
7d974794
BS		 8438{
8439 int status;
8440 struct nfs41_test_stateid_args args = {
1cab0652 8441 .stateid = stateid,
7d974794
BS		 8442 };
8443 struct nfs41_test_stateid_res res;
8444 struct rpc_message msg = {
8445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8446 .rpc_argp = &args,
8447 .rpc_resp = &res,
ab7cb0df 8448 .rpc_cred = cred,
7d974794 8449 };
3787d506
WAA		 8450 struct rpc_clnt *rpc_client = server->client;
8451
8452 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8453 &rpc_client, &msg);
1cab0652 8454
38527b15 8455 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8456 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8457 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8458 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8459 &args.seq_args, &res.seq_res);
38527b15
CL		 8460 if (status != NFS_OK) {
8461 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8462 return status;
38527b15
CL		 8463 }
8464 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8465 return -res.status;
7d974794
BS		 8466}
8467
38527b15
CL		 8468/**
8469 * nfs41_test_stateid - perform a TEST_STATEID operation
8470 *
8471 * @server: server / transport on which to perform the operation
8472 * @stateid: state ID to test
ab7cb0df 8473 * @cred: credential
38527b15
CL		 8474 *
8475 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8476 * Otherwise a negative NFS4ERR value is returned if the operation
8477 * failed or the state ID is not currently valid.
8478 */
ab7cb0df
TM		 8479static int nfs41_test_stateid(struct nfs_server *server,
8480 nfs4_stateid *stateid,
8481 struct rpc_cred *cred)
7d974794
BS		 8482{
8483 struct nfs4_exception exception = { };
8484 int err;
8485 do {
ab7cb0df 8486 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8487 if (err != -NFS4ERR_DELAY)
8488 break;
8489 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8490 } while (exception.retry);
8491 return err;
8492}
9aeda35f 8493
7c1d5fae
TM		 8494struct nfs_free_stateid_data {
8495 struct nfs_server *server;
8496 struct nfs41_free_stateid_args args;
9aeda35f 8497 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8498};
8499
8500static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8501{
8502 struct nfs_free_stateid_data *data = calldata;
8503 nfs41_setup_sequence(nfs4_get_session(data->server),
8504 &data->args.seq_args,
8505 &data->res.seq_res,
8506 task);
8507}
8508
8509static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8510{
8511 struct nfs_free_stateid_data *data = calldata;
8512
8513 nfs41_sequence_done(task, &data->res.seq_res);
8514
8515 switch (task->tk_status) {
8516 case -NFS4ERR_DELAY:
8478eaa1 8517 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8518 rpc_restart_call_prepare(task);
8519 }
8520}
8521
8522static void nfs41_free_stateid_release(void *calldata)
8523{
8524 kfree(calldata);
8525}
8526
17f26b12 8527static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8528 .rpc_call_prepare = nfs41_free_stateid_prepare,
8529 .rpc_call_done = nfs41_free_stateid_done,
8530 .rpc_release = nfs41_free_stateid_release,
8531};
8532
8533static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8534 nfs4_stateid *stateid,
ab7cb0df 8535 struct rpc_cred *cred,
7c1d5fae
TM		 8536 bool privileged)
8537{
9aeda35f
BS		 8538 struct rpc_message msg = {
8539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8540 .rpc_cred = cred,
9aeda35f 8541 };
7c1d5fae
TM		 8542 struct rpc_task_setup task_setup = {
8543 .rpc_client = server->client,
8544 .rpc_message = &msg,
8545 .callback_ops = &nfs41_free_stateid_ops,
8546 .flags = RPC_TASK_ASYNC,
8547 };
8548 struct nfs_free_stateid_data *data;
9aeda35f 8549
3787d506
WAA		 8550 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8551 &task_setup.rpc_client, &msg);
8552
38527b15 8553 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8554 data = kmalloc(sizeof(*data), GFP_NOFS);
8555 if (!data)
8556 return ERR_PTR(-ENOMEM);
8557 data->server = server;
8558 nfs4_stateid_copy(&data->args.stateid, stateid);
8559
8560 task_setup.callback_data = data;
8561
8562 msg.rpc_argp = &data->args;
8563 msg.rpc_resp = &data->res;
a9c92d6b 8564 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8565 if (privileged)
8566 nfs4_set_sequence_privileged(&data->args.seq_args);
8567
8568 return rpc_run_task(&task_setup);
9aeda35f
BS		 8569}
8570
38527b15
CL		 8571/**
8572 * nfs41_free_stateid - perform a FREE_STATEID operation
8573 *
8574 * @server: server / transport on which to perform the operation
8575 * @stateid: state ID to release
ab7cb0df 8576 * @cred: credential
38527b15
CL		 8577 *
8578 * Returns NFS_OK if the server freed "stateid". Otherwise a
8579 * negative NFS4ERR value is returned.
8580 */
ab7cb0df
TM		 8581static int nfs41_free_stateid(struct nfs_server *server,
8582 nfs4_stateid *stateid,
8583 struct rpc_cred *cred)
9aeda35f 8584{
7c1d5fae
TM		 8585 struct rpc_task *task;
8586 int ret;
8587
ab7cb0df 8588 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8589 if (IS_ERR(task))
8590 return PTR_ERR(task);
8591 ret = rpc_wait_for_completion_task(task);
8592 if (!ret)
8593 ret = task->tk_status;
8594 rpc_put_task(task);
8595 return ret;
9aeda35f 8596}
36281caa 8597
f1cdae87
JL		 8598static void
8599nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8600{
8601 struct rpc_task *task;
ab7cb0df 8602 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8603
ab7cb0df 8604 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8605 nfs4_free_lock_state(server, lsp);
8606 if (IS_ERR(task))
f1cdae87 8607 return;
c8b2d0bf 8608 rpc_put_task(task);
c8b2d0bf
TM		 8609}
8610
36281caa
TM		 8611static bool nfs41_match_stateid(const nfs4_stateid *s1,
8612 const nfs4_stateid *s2)
8613{
2d2f24ad 8614 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8615 return false;
8616
2d2f24ad 8617 if (s1->seqid == s2->seqid)
36281caa 8618 return true;
2d2f24ad 8619 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8620 return true;
8621
8622 return false;
8623}
8624
557134a3
AA		 8625#endif /* CONFIG_NFS_V4_1 */
8626
36281caa
TM		 8627static bool nfs4_match_stateid(const nfs4_stateid *s1,
8628 const nfs4_stateid *s2)
8629{
f597c537 8630 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8631}
8632
8633
17280175 8634static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8635 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8636 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8637 .recover_open = nfs4_open_reclaim,
8638 .recover_lock = nfs4_lock_reclaim,
591d71cb 8639 .establish_clid = nfs4_init_clientid,
05f4c350 8640 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8641};
8642
591d71cb 8643#if defined(CONFIG_NFS_V4_1)
17280175 8644static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8645 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8646 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8647 .recover_open = nfs4_open_reclaim,
8648 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8649 .establish_clid = nfs41_init_clientid,
fce5c838 8650 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8651 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8652};
8653#endif /* CONFIG_NFS_V4_1 */
8654
17280175 8655static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8656 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8657 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8658 .recover_open = nfs40_open_expired,
591d71cb
AA		 8659 .recover_lock = nfs4_lock_expired,
8660 .establish_clid = nfs4_init_clientid,
8661};
8662
8663#if defined(CONFIG_NFS_V4_1)
17280175 8664static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8665 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8666 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8667 .recover_open = nfs41_open_expired,
8668 .recover_lock = nfs41_lock_expired,
4d643d1d 8669 .establish_clid = nfs41_init_clientid,
1da177e4 8670};
591d71cb 8671#endif /* CONFIG_NFS_V4_1 */
1da177e4 8672
17280175 8673static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8674 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8675 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8676 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8677};
8678
8679#if defined(CONFIG_NFS_V4_1)
17280175 8680static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8681 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8682 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8683 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8684};
8685#endif
8686
ec011fe8 8687static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8688 .get_locations = _nfs40_proc_get_locations,
44c99933 8689 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8690};
8691
8692#if defined(CONFIG_NFS_V4_1)
8693static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8694 .get_locations = _nfs41_proc_get_locations,
44c99933 8695 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8696};
8697#endif /* CONFIG_NFS_V4_1 */
8698
97dc1359
TM		 8699static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8700 .minor_version = 0,
39c6daae
TM		 8701 .init_caps = NFS_CAP_READDIRPLUS
8702 | NFS_CAP_ATOMIC_OPEN
39c6daae 8703 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8704 .init_client = nfs40_init_client,
8705 .shutdown_client = nfs40_shutdown_client,
36281caa 8706 .match_stateid = nfs4_match_stateid,
fca78d6d 8707 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8708 .free_lock_state = nfs4_release_lockowner,
63f5f796 8709 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8710 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8711 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8712 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8713 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8714 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8715};
8716
8717#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8718static struct nfs_seqid *
8719nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8720{
8721 return NULL;
8722}
8723
97dc1359
TM		 8724static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8725 .minor_version = 1,
39c6daae
TM		 8726 .init_caps = NFS_CAP_READDIRPLUS
8727 | NFS_CAP_ATOMIC_OPEN
3b66486c 8728 | NFS_CAP_POSIX_LOCK
49f9a0fa 8729 | NFS_CAP_STATEID_NFSV41
e983120e 8730 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8731 .init_client = nfs41_init_client,
8732 .shutdown_client = nfs41_shutdown_client,
36281caa 8733 .match_stateid = nfs41_match_stateid,
fca78d6d 8734 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8735 .free_lock_state = nfs41_free_lock_state,
63f5f796 8736 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8737 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8738 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8739 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8740 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8741 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8742};
8743#endif
8744
42c2c424
SD		 8745#if defined(CONFIG_NFS_V4_2)
8746static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8747 .minor_version = 2,
7017310a
BS		 8748 .init_caps = NFS_CAP_READDIRPLUS
8749 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8750 | NFS_CAP_POSIX_LOCK
8751 | NFS_CAP_STATEID_NFSV41
e983120e 8752 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8753 | NFS_CAP_ALLOCATE
624bd5b7 8754 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8755 | NFS_CAP_SEEK
8756 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8757 .init_client = nfs41_init_client,
8758 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8759 .match_stateid = nfs41_match_stateid,
8760 .find_root_sec = nfs41_find_root_sec,
7017310a 8761 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8762 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8763 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8764 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8765 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8766 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8767 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8768};
8769#endif
8770
97dc1359
TM		 8771const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8772 [0] = &nfs_v4_0_minor_ops,
8773#if defined(CONFIG_NFS_V4_1)
8774 [1] = &nfs_v4_1_minor_ops,
8775#endif
42c2c424
SD		 8776#if defined(CONFIG_NFS_V4_2)
8777 [2] = &nfs_v4_2_minor_ops,
8778#endif
97dc1359
TM		 8779};
8780
17f26b12 8781static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8782 .create = nfs_create,
8783 .lookup = nfs_lookup,
8784 .atomic_open = nfs_atomic_open,
8785 .link = nfs_link,
8786 .unlink = nfs_unlink,
8787 .symlink = nfs_symlink,
8788 .mkdir = nfs_mkdir,
8789 .rmdir = nfs_rmdir,
8790 .mknod = nfs_mknod,
8791 .rename = nfs_rename,
8792 .permission = nfs_permission,
8793 .getattr = nfs_getattr,
8794 .setattr = nfs_setattr,
8795 .getxattr = generic_getxattr,
8796 .setxattr = generic_setxattr,
8797 .listxattr = generic_listxattr,
8798 .removexattr = generic_removexattr,
8799};
8800
92e1d5be 8801static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8802 .permission = nfs_permission,
8803 .getattr = nfs_getattr,
8804 .setattr = nfs_setattr,
64c2ce8b
AK		 8805 .getxattr = generic_getxattr,
8806 .setxattr = generic_setxattr,
8807 .listxattr = generic_listxattr,
8808 .removexattr = generic_removexattr,
6b3b5496
BF		 8809};
8810
509de811 8811const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8812 .version = 4, /* protocol version */
8813 .dentry_ops = &nfs4_dentry_operations,
8814 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8815 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8816 .file_ops = &nfs4_file_operations,
1da177e4 8817 .getroot = nfs4_proc_get_root,
281cad46 8818 .submount = nfs4_submount,
ff9099f2 8819 .try_mount = nfs4_try_mount,
1da177e4
LT		 8820 .getattr = nfs4_proc_getattr,
8821 .setattr = nfs4_proc_setattr,
8822 .lookup = nfs4_proc_lookup,
8823 .access = nfs4_proc_access,
8824 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8825 .create = nfs4_proc_create,
8826 .remove = nfs4_proc_remove,
8827 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8828 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8829 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8830 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8831 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8832 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8833 .link = nfs4_proc_link,
8834 .symlink = nfs4_proc_symlink,
8835 .mkdir = nfs4_proc_mkdir,
8836 .rmdir = nfs4_proc_remove,
8837 .readdir = nfs4_proc_readdir,
8838 .mknod = nfs4_proc_mknod,
8839 .statfs = nfs4_proc_statfs,
8840 .fsinfo = nfs4_proc_fsinfo,
8841 .pathconf = nfs4_proc_pathconf,
e9326dca 8842 .set_capabilities = nfs4_server_capabilities,
1da177e4 8843 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8844 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8845 .read_setup = nfs4_proc_read_setup,
ec06c096 8846 .read_done = nfs4_read_done,
1da177e4 8847 .write_setup = nfs4_proc_write_setup,
788e7a89 8848 .write_done = nfs4_write_done,
1da177e4 8849 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8850 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8851 .commit_done = nfs4_commit_done,
1da177e4 8852 .lock = nfs4_proc_lock,
e50a1c2e 8853 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8854 .close_context = nfs4_close_context,
2b484297 8855 .open_context = nfs4_atomic_open,
011e2a7f 8856 .have_delegation = nfs4_have_delegation,
57ec14c5 8857 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8858 .alloc_client = nfs4_alloc_client,
45a52a02 8859 .init_client = nfs4_init_client,
cdb7eced 8860 .free_client = nfs4_free_client,
1179acc6
BS		 8861 .create_server = nfs4_create_server,
8862 .clone_server = nfs_clone_server,
1da177e4
LT		 8863};
8864
64c2ce8b
AK		 8865static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8866 .prefix = XATTR_NAME_NFSV4_ACL,
8867 .list = nfs4_xattr_list_nfs4_acl,
8868 .get = nfs4_xattr_get_nfs4_acl,
8869 .set = nfs4_xattr_set_nfs4_acl,
8870};
8871
8872const struct xattr_handler *nfs4_xattr_handlers[] = {
8873 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8874#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8875 &nfs4_xattr_nfs4_label_handler,
8876#endif
64c2ce8b
AK		 8877 NULL
8878};
8879
1da177e4
LT		 8880/*
8881 * Local variables:
8882 * c-basic-offset: 8
8883 * End:
8884 */
Linux 6.x block layer and io_uring tree(s)