4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
55 #define NFSDBG_FACILITY NFSDBG_PROC
57 #define NFS4_POLL_RETRY_MIN (1*HZ)
58 #define NFS4_POLL_RETRY_MAX (15*HZ)
60 static int _nfs4_proc_open_confirm(struct rpc_clnt
*clnt
, const struct nfs_fh
*fh
, struct nfs4_state_owner
*sp
, nfs4_stateid
*stateid
, struct nfs_seqid
*seqid
);
61 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
62 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*);
63 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
);
64 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
);
65 extern u32
*nfs4_decode_dirent(u32
*p
, struct nfs_entry
*entry
, int plus
);
66 extern struct rpc_procinfo nfs4_procedures
[];
68 /* Prevent leaks of NFSv4 errors into userland */
69 int nfs4_map_errors(int err
)
72 dprintk("%s could not handle NFSv4 error %d\n",
80 * This is our standard bitmap for GETATTR requests.
82 const u32 nfs4_fattr_bitmap
[2] = {
87 | FATTR4_WORD0_FILEID
,
89 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_SPACE_USED
94 | FATTR4_WORD1_TIME_ACCESS
95 | FATTR4_WORD1_TIME_METADATA
96 | FATTR4_WORD1_TIME_MODIFY
99 const u32 nfs4_statfs_bitmap
[2] = {
100 FATTR4_WORD0_FILES_AVAIL
101 | FATTR4_WORD0_FILES_FREE
102 | FATTR4_WORD0_FILES_TOTAL
,
103 FATTR4_WORD1_SPACE_AVAIL
104 | FATTR4_WORD1_SPACE_FREE
105 | FATTR4_WORD1_SPACE_TOTAL
108 const u32 nfs4_pathconf_bitmap
[2] = {
110 | FATTR4_WORD0_MAXNAME
,
114 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
115 | FATTR4_WORD0_MAXREAD
116 | FATTR4_WORD0_MAXWRITE
117 | FATTR4_WORD0_LEASE_TIME
,
121 static void nfs4_setup_readdir(u64 cookie
, u32
*verifier
, struct dentry
*dentry
,
122 struct nfs4_readdir_arg
*readdir
)
126 BUG_ON(readdir
->count
< 80);
128 readdir
->cookie
= cookie
;
129 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
134 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
139 * NFSv4 servers do not return entries for '.' and '..'
140 * Therefore, we fake these entries here. We let '.'
141 * have cookie 0 and '..' have cookie 1. Note that
142 * when talking to the server, we always send cookie 0
145 start
= p
= (u32
*)kmap_atomic(*readdir
->pages
, KM_USER0
);
148 *p
++ = xdr_one
; /* next */
149 *p
++ = xdr_zero
; /* cookie, first word */
150 *p
++ = xdr_one
; /* cookie, second word */
151 *p
++ = xdr_one
; /* entry len */
152 memcpy(p
, ".\0\0\0", 4); /* entry */
154 *p
++ = xdr_one
; /* bitmap length */
155 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
156 *p
++ = htonl(8); /* attribute buffer length */
157 p
= xdr_encode_hyper(p
, dentry
->d_inode
->i_ino
);
160 *p
++ = xdr_one
; /* next */
161 *p
++ = xdr_zero
; /* cookie, first word */
162 *p
++ = xdr_two
; /* cookie, second word */
163 *p
++ = xdr_two
; /* entry len */
164 memcpy(p
, "..\0\0", 4); /* entry */
166 *p
++ = xdr_one
; /* bitmap length */
167 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
168 *p
++ = htonl(8); /* attribute buffer length */
169 p
= xdr_encode_hyper(p
, dentry
->d_parent
->d_inode
->i_ino
);
171 readdir
->pgbase
= (char *)p
- (char *)start
;
172 readdir
->count
-= readdir
->pgbase
;
173 kunmap_atomic(start
, KM_USER0
);
177 renew_lease(struct nfs_server
*server
, unsigned long timestamp
)
179 struct nfs4_client
*clp
= server
->nfs4_state
;
180 spin_lock(&clp
->cl_lock
);
181 if (time_before(clp
->cl_last_renewal
,timestamp
))
182 clp
->cl_last_renewal
= timestamp
;
183 spin_unlock(&clp
->cl_lock
);
186 static void update_changeattr(struct inode
*inode
, struct nfs4_change_info
*cinfo
)
188 struct nfs_inode
*nfsi
= NFS_I(inode
);
190 if (cinfo
->before
== nfsi
->change_attr
&& cinfo
->atomic
)
191 nfsi
->change_attr
= cinfo
->after
;
194 /* Helper for asynchronous RPC calls */
195 static int nfs4_call_async(struct rpc_clnt
*clnt
, rpc_action tk_begin
,
196 rpc_action tk_exit
, void *calldata
)
198 struct rpc_task
*task
;
200 if (!(task
= rpc_new_task(clnt
, tk_exit
, RPC_TASK_ASYNC
)))
203 task
->tk_calldata
= calldata
;
204 task
->tk_action
= tk_begin
;
209 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
211 struct inode
*inode
= state
->inode
;
213 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
214 /* Protect against nfs4_find_state() */
215 spin_lock(&inode
->i_lock
);
216 state
->state
|= open_flags
;
217 /* NB! List reordering - see the reclaim code for why. */
218 if ((open_flags
& FMODE_WRITE
) && 0 == state
->nwriters
++)
219 list_move(&state
->open_states
, &state
->owner
->so_states
);
220 if (open_flags
& FMODE_READ
)
222 memcpy(&state
->stateid
, stateid
, sizeof(state
->stateid
));
223 spin_unlock(&inode
->i_lock
);
228 * reclaim state on the server after a reboot.
230 static int _nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
232 struct inode
*inode
= state
->inode
;
233 struct nfs_server
*server
= NFS_SERVER(inode
);
234 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
235 struct nfs_openargs o_arg
= {
238 .open_flags
= state
->state
,
239 .clientid
= server
->nfs4_state
->cl_clientid
,
240 .claim
= NFS4_OPEN_CLAIM_PREVIOUS
,
241 .bitmask
= server
->attr_bitmask
,
243 struct nfs_openres o_res
= {
244 .server
= server
, /* Grrr */
246 struct rpc_message msg
= {
247 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
250 .rpc_cred
= sp
->so_cred
,
254 if (delegation
!= NULL
) {
255 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
256 memcpy(&state
->stateid
, &delegation
->stateid
,
257 sizeof(state
->stateid
));
258 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
261 o_arg
.u
.delegation_type
= delegation
->type
;
263 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
264 if (o_arg
.seqid
== NULL
)
266 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
267 /* Confirm the sequence as being established */
268 nfs_confirm_seqid(&sp
->so_seqid
, status
);
269 nfs_increment_open_seqid(status
, o_arg
.seqid
);
271 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
272 if (o_res
.delegation_type
!= 0) {
273 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
274 /* Did the server issue an immediate delegation recall? */
276 nfs_async_inode_return_delegation(inode
, &o_res
.stateid
);
279 nfs_free_seqid(o_arg
.seqid
);
280 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
281 /* Ensure we update the inode attributes */
286 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
288 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
289 struct nfs4_exception exception
= { };
292 err
= _nfs4_open_reclaim(sp
, state
);
293 if (err
!= -NFS4ERR_DELAY
)
295 nfs4_handle_exception(server
, err
, &exception
);
296 } while (exception
.retry
);
300 static int _nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
302 struct nfs4_state_owner
*sp
= state
->owner
;
303 struct inode
*inode
= dentry
->d_inode
;
304 struct nfs_server
*server
= NFS_SERVER(inode
);
305 struct dentry
*parent
= dget_parent(dentry
);
306 struct nfs_openargs arg
= {
307 .fh
= NFS_FH(parent
->d_inode
),
308 .clientid
= server
->nfs4_state
->cl_clientid
,
309 .name
= &dentry
->d_name
,
312 .bitmask
= server
->attr_bitmask
,
313 .claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
,
315 struct nfs_openres res
= {
318 struct rpc_message msg
= {
319 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
322 .rpc_cred
= sp
->so_cred
,
326 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
328 if (state
->state
== 0)
330 arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
332 if (arg
.seqid
== NULL
)
334 arg
.open_flags
= state
->state
;
335 memcpy(arg
.u
.delegation
.data
, state
->stateid
.data
, sizeof(arg
.u
.delegation
.data
));
336 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
337 nfs_increment_open_seqid(status
, arg
.seqid
);
340 if(res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
341 status
= _nfs4_proc_open_confirm(server
->client
, NFS_FH(inode
),
342 sp
, &res
.stateid
, arg
.seqid
);
346 nfs_confirm_seqid(&sp
->so_seqid
, 0);
348 memcpy(state
->stateid
.data
, res
.stateid
.data
,
349 sizeof(state
->stateid
.data
));
350 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
353 nfs_free_seqid(arg
.seqid
);
359 int nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
361 struct nfs4_exception exception
= { };
362 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
365 err
= _nfs4_open_delegation_recall(dentry
, state
);
369 case -NFS4ERR_STALE_CLIENTID
:
370 case -NFS4ERR_STALE_STATEID
:
371 case -NFS4ERR_EXPIRED
:
372 /* Don't recall a delegation if it was lost */
373 nfs4_schedule_state_recovery(server
->nfs4_state
);
376 err
= nfs4_handle_exception(server
, err
, &exception
);
377 } while (exception
.retry
);
381 static int _nfs4_proc_open_confirm(struct rpc_clnt
*clnt
, const struct nfs_fh
*fh
, struct nfs4_state_owner
*sp
, nfs4_stateid
*stateid
, struct nfs_seqid
*seqid
)
383 struct nfs_open_confirmargs arg
= {
388 struct nfs_open_confirmres res
;
389 struct rpc_message msg
= {
390 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
393 .rpc_cred
= sp
->so_cred
,
397 status
= rpc_call_sync(clnt
, &msg
, RPC_TASK_NOINTR
);
398 /* Confirm the sequence as being established */
399 nfs_confirm_seqid(&sp
->so_seqid
, status
);
400 nfs_increment_open_seqid(status
, seqid
);
402 memcpy(stateid
, &res
.stateid
, sizeof(*stateid
));
406 static int _nfs4_proc_open(struct inode
*dir
, struct nfs4_state_owner
*sp
, struct nfs_openargs
*o_arg
, struct nfs_openres
*o_res
)
408 struct nfs_server
*server
= NFS_SERVER(dir
);
409 struct rpc_message msg
= {
410 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
413 .rpc_cred
= sp
->so_cred
,
417 /* Update sequence id. The caller must serialize! */
418 o_arg
->id
= sp
->so_id
;
419 o_arg
->clientid
= sp
->so_client
->cl_clientid
;
421 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
423 /* OPEN on anything except a regular file is disallowed in NFSv4 */
424 switch (o_res
->f_attr
->mode
& S_IFMT
) {
438 nfs_increment_open_seqid(status
, o_arg
->seqid
);
441 update_changeattr(dir
, &o_res
->cinfo
);
442 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
443 status
= _nfs4_proc_open_confirm(server
->client
, &o_res
->fh
,
444 sp
, &o_res
->stateid
, o_arg
->seqid
);
448 nfs_confirm_seqid(&sp
->so_seqid
, 0);
449 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
450 status
= server
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
455 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
457 struct nfs_access_entry cache
;
461 if (openflags
& FMODE_READ
)
463 if (openflags
& FMODE_WRITE
)
465 status
= nfs_access_get_cached(inode
, cred
, &cache
);
469 /* Be clever: ask server to check for all possible rights */
470 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
472 cache
.jiffies
= jiffies
;
473 status
= _nfs4_proc_access(inode
, &cache
);
476 nfs_access_add_cache(inode
, &cache
);
478 if ((cache
.mask
& mask
) == mask
)
485 * reclaim state on the server after a network partition.
486 * Assumes caller holds the appropriate lock
488 static int _nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
490 struct dentry
*parent
= dget_parent(dentry
);
491 struct inode
*dir
= parent
->d_inode
;
492 struct inode
*inode
= state
->inode
;
493 struct nfs_server
*server
= NFS_SERVER(dir
);
494 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
495 struct nfs_fattr f_attr
= {
498 struct nfs_openargs o_arg
= {
500 .open_flags
= state
->state
,
501 .name
= &dentry
->d_name
,
502 .bitmask
= server
->attr_bitmask
,
503 .claim
= NFS4_OPEN_CLAIM_NULL
,
505 struct nfs_openres o_res
= {
511 if (delegation
!= NULL
&& !(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
512 status
= _nfs4_do_access(inode
, sp
->so_cred
, state
->state
);
515 memcpy(&state
->stateid
, &delegation
->stateid
, sizeof(state
->stateid
));
516 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
519 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
521 if (o_arg
.seqid
== NULL
)
523 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
526 /* Check if files differ */
527 if ((f_attr
.mode
& S_IFMT
) != (inode
->i_mode
& S_IFMT
))
529 /* Has the file handle changed? */
530 if (nfs_compare_fh(&o_res
.fh
, NFS_FH(inode
)) != 0) {
531 /* Verify if the change attributes are the same */
532 if (f_attr
.change_attr
!= NFS_I(inode
)->change_attr
)
534 if (nfs_size_to_loff_t(f_attr
.size
) != inode
->i_size
)
536 /* Lets just pretend that this is the same file */
537 nfs_copy_fh(NFS_FH(inode
), &o_res
.fh
);
538 NFS_I(inode
)->fileid
= f_attr
.fileid
;
540 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
541 if (o_res
.delegation_type
!= 0) {
542 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
))
543 nfs_inode_set_delegation(inode
, sp
->so_cred
, &o_res
);
545 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
548 nfs_free_seqid(o_arg
.seqid
);
549 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
555 /* Invalidate the state owner so we don't ever use it again */
556 nfs4_drop_state_owner(sp
);
558 /* Should we be trying to close that stateid? */
562 static inline int nfs4_do_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
564 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
565 struct nfs4_exception exception
= { };
569 err
= _nfs4_open_expired(sp
, state
, dentry
);
570 if (err
== -NFS4ERR_DELAY
)
571 nfs4_handle_exception(server
, err
, &exception
);
572 } while (exception
.retry
);
576 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
578 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
579 struct nfs_open_context
*ctx
;
582 spin_lock(&state
->inode
->i_lock
);
583 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
584 if (ctx
->state
!= state
)
586 get_nfs_open_context(ctx
);
587 spin_unlock(&state
->inode
->i_lock
);
588 status
= nfs4_do_open_expired(sp
, state
, ctx
->dentry
);
589 put_nfs_open_context(ctx
);
592 spin_unlock(&state
->inode
->i_lock
);
597 * Returns an nfs4_state + an extra reference to the inode
599 static int _nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
601 struct nfs_delegation
*delegation
;
602 struct nfs_server
*server
= NFS_SERVER(inode
);
603 struct nfs4_client
*clp
= server
->nfs4_state
;
604 struct nfs_inode
*nfsi
= NFS_I(inode
);
605 struct nfs4_state_owner
*sp
= NULL
;
606 struct nfs4_state
*state
= NULL
;
607 int open_flags
= flags
& (FMODE_READ
|FMODE_WRITE
);
610 /* Protect against reboot recovery - NOTE ORDER! */
611 down_read(&clp
->cl_sem
);
612 /* Protect against delegation recall */
613 down_read(&nfsi
->rwsem
);
614 delegation
= NFS_I(inode
)->delegation
;
616 if (delegation
== NULL
|| (delegation
->type
& open_flags
) != open_flags
)
619 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
620 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__
);
623 state
= nfs4_get_open_state(inode
, sp
);
628 if ((state
->state
& open_flags
) == open_flags
) {
629 spin_lock(&inode
->i_lock
);
630 if (open_flags
& FMODE_READ
)
632 if (open_flags
& FMODE_WRITE
)
634 spin_unlock(&inode
->i_lock
);
636 } else if (state
->state
!= 0)
640 err
= _nfs4_do_access(inode
, cred
, open_flags
);
644 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
645 update_open_stateid(state
, &delegation
->stateid
, open_flags
);
647 nfs4_put_state_owner(sp
);
648 up_read(&nfsi
->rwsem
);
649 up_read(&clp
->cl_sem
);
656 nfs4_put_open_state(state
);
657 nfs4_put_state_owner(sp
);
659 up_read(&nfsi
->rwsem
);
660 up_read(&clp
->cl_sem
);
662 nfs_inode_return_delegation(inode
);
666 static struct nfs4_state
*nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
)
668 struct nfs4_exception exception
= { };
669 struct nfs4_state
*res
;
673 err
= _nfs4_open_delegated(inode
, flags
, cred
, &res
);
676 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode
),
678 } while (exception
.retry
);
683 * Returns an nfs4_state + an referenced inode
685 static int _nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
687 struct nfs4_state_owner
*sp
;
688 struct nfs4_state
*state
= NULL
;
689 struct nfs_server
*server
= NFS_SERVER(dir
);
690 struct nfs4_client
*clp
= server
->nfs4_state
;
691 struct inode
*inode
= NULL
;
693 struct nfs_fattr f_attr
= {
696 struct nfs_openargs o_arg
= {
699 .name
= &dentry
->d_name
,
701 .bitmask
= server
->attr_bitmask
,
702 .claim
= NFS4_OPEN_CLAIM_NULL
,
704 struct nfs_openres o_res
= {
709 /* Protect against reboot recovery conflicts */
710 down_read(&clp
->cl_sem
);
712 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
713 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
716 if (flags
& O_EXCL
) {
717 u32
*p
= (u32
*) o_arg
.u
.verifier
.data
;
721 o_arg
.u
.attrs
= sattr
;
722 /* Serialization for the sequence id */
724 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
725 if (o_arg
.seqid
== NULL
)
727 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
732 inode
= nfs_fhget(dir
->i_sb
, &o_res
.fh
, &f_attr
);
735 state
= nfs4_get_open_state(inode
, sp
);
738 update_open_stateid(state
, &o_res
.stateid
, flags
);
739 if (o_res
.delegation_type
!= 0)
740 nfs_inode_set_delegation(inode
, cred
, &o_res
);
741 nfs_free_seqid(o_arg
.seqid
);
742 nfs4_put_state_owner(sp
);
743 up_read(&clp
->cl_sem
);
749 nfs4_put_open_state(state
);
750 nfs_free_seqid(o_arg
.seqid
);
751 nfs4_put_state_owner(sp
);
753 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
754 up_read(&clp
->cl_sem
);
762 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
764 struct nfs4_exception exception
= { };
765 struct nfs4_state
*res
;
769 status
= _nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
, &res
);
772 /* NOTE: BAD_SEQID means the server and client disagree about the
773 * book-keeping w.r.t. state-changing operations
774 * (OPEN/CLOSE/LOCK/LOCKU...)
775 * It is actually a sign of a bug on the client or on the server.
777 * If we receive a BAD_SEQID error in the particular case of
778 * doing an OPEN, we assume that nfs_increment_open_seqid() will
779 * have unhashed the old state_owner for us, and that we can
780 * therefore safely retry using a new one. We should still warn
783 if (status
== -NFS4ERR_BAD_SEQID
) {
784 printk(KERN_WARNING
"NFS: v4 server returned a bad sequence-id error!\n");
789 * BAD_STATEID on OPEN means that the server cancelled our
790 * state before it received the OPEN_CONFIRM.
791 * Recover by retrying the request as per the discussion
792 * on Page 181 of RFC3530.
794 if (status
== -NFS4ERR_BAD_STATEID
) {
798 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
799 status
, &exception
));
800 } while (exception
.retry
);
804 static int _nfs4_do_setattr(struct nfs_server
*server
, struct nfs_fattr
*fattr
,
805 struct nfs_fh
*fhandle
, struct iattr
*sattr
,
806 struct nfs4_state
*state
)
808 struct nfs_setattrargs arg
= {
812 .bitmask
= server
->attr_bitmask
,
814 struct nfs_setattrres res
= {
818 struct rpc_message msg
= {
819 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
828 msg
.rpc_cred
= state
->owner
->so_cred
;
829 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
831 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
833 status
= rpc_call_sync(server
->client
, &msg
, 0);
837 static int nfs4_do_setattr(struct nfs_server
*server
, struct nfs_fattr
*fattr
,
838 struct nfs_fh
*fhandle
, struct iattr
*sattr
,
839 struct nfs4_state
*state
)
841 struct nfs4_exception exception
= { };
844 err
= nfs4_handle_exception(server
,
845 _nfs4_do_setattr(server
, fattr
, fhandle
, sattr
,
848 } while (exception
.retry
);
852 struct nfs4_closedata
{
854 struct nfs4_state
*state
;
855 struct nfs_closeargs arg
;
856 struct nfs_closeres res
;
859 static void nfs4_free_closedata(struct nfs4_closedata
*calldata
)
861 struct nfs4_state
*state
= calldata
->state
;
862 struct nfs4_state_owner
*sp
= state
->owner
;
864 nfs4_put_open_state(calldata
->state
);
865 nfs_free_seqid(calldata
->arg
.seqid
);
866 nfs4_put_state_owner(sp
);
870 static void nfs4_close_done(struct rpc_task
*task
)
872 struct nfs4_closedata
*calldata
= (struct nfs4_closedata
*)task
->tk_calldata
;
873 struct nfs4_state
*state
= calldata
->state
;
874 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
876 /* hmm. we are done with the inode, and in the process of freeing
877 * the state_owner. we keep this around to process errors
879 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
880 switch (task
->tk_status
) {
882 memcpy(&state
->stateid
, &calldata
->res
.stateid
,
883 sizeof(state
->stateid
));
885 case -NFS4ERR_STALE_STATEID
:
886 case -NFS4ERR_EXPIRED
:
887 state
->state
= calldata
->arg
.open_flags
;
888 nfs4_schedule_state_recovery(server
->nfs4_state
);
891 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
892 rpc_restart_call(task
);
896 state
->state
= calldata
->arg
.open_flags
;
897 nfs4_free_closedata(calldata
);
900 static void nfs4_close_begin(struct rpc_task
*task
)
902 struct nfs4_closedata
*calldata
= (struct nfs4_closedata
*)task
->tk_calldata
;
903 struct nfs4_state
*state
= calldata
->state
;
904 struct rpc_message msg
= {
905 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
906 .rpc_argp
= &calldata
->arg
,
907 .rpc_resp
= &calldata
->res
,
908 .rpc_cred
= state
->owner
->so_cred
,
913 status
= nfs_wait_on_sequence(calldata
->arg
.seqid
, task
);
916 /* Don't reorder reads */
918 /* Recalculate the new open mode in case someone reopened the file
919 * while we were waiting in line to be scheduled.
921 if (state
->nreaders
!= 0)
923 if (state
->nwriters
!= 0)
925 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
927 if (mode
== state
->state
) {
928 nfs4_free_closedata(calldata
);
929 task
->tk_exit
= NULL
;
934 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
935 calldata
->arg
.open_flags
= mode
;
936 rpc_call_setup(task
, &msg
, 0);
940 * It is possible for data to be read/written from a mem-mapped file
941 * after the sys_close call (which hits the vfs layer as a flush).
942 * This means that we can't safely call nfsv4 close on a file until
943 * the inode is cleared. This in turn means that we are not good
944 * NFSv4 citizens - we do not indicate to the server to update the file's
945 * share state even when we are done with one of the three share
946 * stateid's in the inode.
948 * NOTE: Caller must be holding the sp->so_owner semaphore!
950 int nfs4_do_close(struct inode
*inode
, struct nfs4_state
*state
, mode_t mode
)
952 struct nfs4_closedata
*calldata
;
953 int status
= -ENOMEM
;
955 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
956 if (calldata
== NULL
)
958 calldata
->inode
= inode
;
959 calldata
->state
= state
;
960 calldata
->arg
.fh
= NFS_FH(inode
);
961 calldata
->arg
.stateid
= &state
->stateid
;
962 /* Serialization for the sequence id */
963 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
964 if (calldata
->arg
.seqid
== NULL
)
965 goto out_free_calldata
;
967 status
= nfs4_call_async(NFS_SERVER(inode
)->client
, nfs4_close_begin
,
968 nfs4_close_done
, calldata
);
972 nfs_free_seqid(calldata
->arg
.seqid
);
979 static void nfs4_intent_set_file(struct nameidata
*nd
, struct dentry
*dentry
, struct nfs4_state
*state
)
983 filp
= lookup_instantiate_filp(nd
, dentry
, NULL
);
985 struct nfs_open_context
*ctx
;
986 ctx
= (struct nfs_open_context
*)filp
->private_data
;
989 nfs4_close_state(state
, nd
->intent
.open
.flags
);
993 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
996 struct rpc_cred
*cred
;
997 struct nfs4_state
*state
;
1000 if (nd
->flags
& LOOKUP_CREATE
) {
1001 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1002 attr
.ia_valid
= ATTR_MODE
;
1003 if (!IS_POSIXACL(dir
))
1004 attr
.ia_mode
&= ~current
->fs
->umask
;
1007 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1010 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1012 return (struct dentry
*)cred
;
1013 state
= nfs4_do_open(dir
, dentry
, nd
->intent
.open
.flags
, &attr
, cred
);
1015 if (IS_ERR(state
)) {
1016 if (PTR_ERR(state
) == -ENOENT
)
1017 d_add(dentry
, NULL
);
1018 return (struct dentry
*)state
;
1020 res
= d_add_unique(dentry
, state
->inode
);
1023 nfs4_intent_set_file(nd
, dentry
, state
);
1028 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1030 struct rpc_cred
*cred
;
1031 struct nfs4_state
*state
;
1032 struct inode
*inode
;
1034 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1036 return PTR_ERR(cred
);
1037 state
= nfs4_open_delegated(dentry
->d_inode
, openflags
, cred
);
1039 state
= nfs4_do_open(dir
, dentry
, openflags
, NULL
, cred
);
1041 if (IS_ERR(state
)) {
1042 switch (PTR_ERR(state
)) {
1048 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1051 if (dentry
->d_inode
== NULL
)
1056 inode
= state
->inode
;
1058 if (inode
== dentry
->d_inode
) {
1059 nfs4_intent_set_file(nd
, dentry
, state
);
1062 nfs4_close_state(state
, openflags
);
1069 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1071 struct nfs4_server_caps_res res
= {};
1072 struct rpc_message msg
= {
1073 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1074 .rpc_argp
= fhandle
,
1079 status
= rpc_call_sync(server
->client
, &msg
, 0);
1081 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1082 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1083 server
->caps
|= NFS_CAP_ACLS
;
1084 if (res
.has_links
!= 0)
1085 server
->caps
|= NFS_CAP_HARDLINKS
;
1086 if (res
.has_symlinks
!= 0)
1087 server
->caps
|= NFS_CAP_SYMLINKS
;
1088 server
->acl_bitmask
= res
.acl_bitmask
;
1093 static int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1095 struct nfs4_exception exception
= { };
1098 err
= nfs4_handle_exception(server
,
1099 _nfs4_server_capabilities(server
, fhandle
),
1101 } while (exception
.retry
);
1105 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1106 struct nfs_fsinfo
*info
)
1108 struct nfs_fattr
* fattr
= info
->fattr
;
1109 struct nfs4_lookup_root_arg args
= {
1110 .bitmask
= nfs4_fattr_bitmap
,
1112 struct nfs4_lookup_res res
= {
1117 struct rpc_message msg
= {
1118 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1123 return rpc_call_sync(server
->client
, &msg
, 0);
1126 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1127 struct nfs_fsinfo
*info
)
1129 struct nfs4_exception exception
= { };
1132 err
= nfs4_handle_exception(server
,
1133 _nfs4_lookup_root(server
, fhandle
, info
),
1135 } while (exception
.retry
);
1139 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1140 struct nfs_fsinfo
*info
)
1142 struct nfs_fattr
* fattr
= info
->fattr
;
1145 struct nfs4_lookup_arg args
= {
1148 .bitmask
= nfs4_fattr_bitmap
,
1150 struct nfs4_lookup_res res
= {
1155 struct rpc_message msg
= {
1156 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1163 * Now we do a separate LOOKUP for each component of the mount path.
1164 * The LOOKUPs are done separately so that we can conveniently
1165 * catch an ERR_WRONGSEC if it occurs along the way...
1167 status
= nfs4_lookup_root(server
, fhandle
, info
);
1171 p
= server
->mnt_path
;
1173 struct nfs4_exception exception
= { };
1180 while (*p
&& (*p
!= '/'))
1186 status
= nfs4_handle_exception(server
,
1187 rpc_call_sync(server
->client
, &msg
, 0),
1189 } while (exception
.retry
);
1192 if (status
== -ENOENT
) {
1193 printk(KERN_NOTICE
"NFS: mount path %s does not exist!\n", server
->mnt_path
);
1194 printk(KERN_NOTICE
"NFS: suggestion: try mounting '/' instead.\n");
1199 status
= nfs4_server_capabilities(server
, fhandle
);
1201 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1206 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1208 struct nfs4_getattr_arg args
= {
1210 .bitmask
= server
->attr_bitmask
,
1212 struct nfs4_getattr_res res
= {
1216 struct rpc_message msg
= {
1217 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1223 return rpc_call_sync(server
->client
, &msg
, 0);
1226 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1228 struct nfs4_exception exception
= { };
1231 err
= nfs4_handle_exception(server
,
1232 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1234 } while (exception
.retry
);
1239 * The file is not closed if it is opened due to the a request to change
1240 * the size of the file. The open call will not be needed once the
1241 * VFS layer lookup-intents are implemented.
1243 * Close is called when the inode is destroyed.
1244 * If we haven't opened the file for O_WRONLY, we
1245 * need to in the size_change case to obtain a stateid.
1248 * Because OPEN is always done by name in nfsv4, it is
1249 * possible that we opened a different file by the same
1250 * name. We can recognize this race condition, but we
1251 * can't do anything about it besides returning an error.
1253 * This will be fixed with VFS changes (lookup-intent).
1256 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1257 struct iattr
*sattr
)
1259 struct rpc_cred
*cred
;
1260 struct inode
*inode
= dentry
->d_inode
;
1261 struct nfs4_state
*state
;
1266 cred
= rpcauth_lookupcred(NFS_SERVER(inode
)->client
->cl_auth
, 0);
1268 return PTR_ERR(cred
);
1269 /* Search for an existing WRITE delegation first */
1270 state
= nfs4_open_delegated(inode
, FMODE_WRITE
, cred
);
1271 if (!IS_ERR(state
)) {
1272 /* NB: nfs4_open_delegated() bumps the inode->i_count */
1275 /* Search for an existing open(O_WRITE) stateid */
1276 state
= nfs4_find_state(inode
, cred
, FMODE_WRITE
);
1279 status
= nfs4_do_setattr(NFS_SERVER(inode
), fattr
,
1280 NFS_FH(inode
), sattr
, state
);
1282 nfs_setattr_update_inode(inode
, sattr
);
1284 nfs4_close_state(state
, FMODE_WRITE
);
1289 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1290 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1293 struct nfs_server
*server
= NFS_SERVER(dir
);
1294 struct nfs4_lookup_arg args
= {
1295 .bitmask
= server
->attr_bitmask
,
1296 .dir_fh
= NFS_FH(dir
),
1299 struct nfs4_lookup_res res
= {
1304 struct rpc_message msg
= {
1305 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1312 dprintk("NFS call lookup %s\n", name
->name
);
1313 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1314 dprintk("NFS reply lookup: %d\n", status
);
1318 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1320 struct nfs4_exception exception
= { };
1323 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1324 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1326 } while (exception
.retry
);
1330 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1332 struct nfs4_accessargs args
= {
1333 .fh
= NFS_FH(inode
),
1335 struct nfs4_accessres res
= { 0 };
1336 struct rpc_message msg
= {
1337 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1340 .rpc_cred
= entry
->cred
,
1342 int mode
= entry
->mask
;
1346 * Determine which access bits we want to ask for...
1348 if (mode
& MAY_READ
)
1349 args
.access
|= NFS4_ACCESS_READ
;
1350 if (S_ISDIR(inode
->i_mode
)) {
1351 if (mode
& MAY_WRITE
)
1352 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1353 if (mode
& MAY_EXEC
)
1354 args
.access
|= NFS4_ACCESS_LOOKUP
;
1356 if (mode
& MAY_WRITE
)
1357 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1358 if (mode
& MAY_EXEC
)
1359 args
.access
|= NFS4_ACCESS_EXECUTE
;
1361 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1364 if (res
.access
& NFS4_ACCESS_READ
)
1365 entry
->mask
|= MAY_READ
;
1366 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1367 entry
->mask
|= MAY_WRITE
;
1368 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1369 entry
->mask
|= MAY_EXEC
;
1374 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1376 struct nfs4_exception exception
= { };
1379 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1380 _nfs4_proc_access(inode
, entry
),
1382 } while (exception
.retry
);
1387 * TODO: For the time being, we don't try to get any attributes
1388 * along with any of the zero-copy operations READ, READDIR,
1391 * In the case of the first three, we want to put the GETATTR
1392 * after the read-type operation -- this is because it is hard
1393 * to predict the length of a GETATTR response in v4, and thus
1394 * align the READ data correctly. This means that the GETATTR
1395 * may end up partially falling into the page cache, and we should
1396 * shift it into the 'tail' of the xdr_buf before processing.
1397 * To do this efficiently, we need to know the total length
1398 * of data received, which doesn't seem to be available outside
1401 * In the case of WRITE, we also want to put the GETATTR after
1402 * the operation -- in this case because we want to make sure
1403 * we get the post-operation mtime and size. This means that
1404 * we can't use xdr_encode_pages() as written: we need a variant
1405 * of it which would leave room in the 'tail' iovec.
1407 * Both of these changes to the XDR layer would in fact be quite
1408 * minor, but I decided to leave them for a subsequent patch.
1410 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1411 unsigned int pgbase
, unsigned int pglen
)
1413 struct nfs4_readlink args
= {
1414 .fh
= NFS_FH(inode
),
1419 struct rpc_message msg
= {
1420 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1425 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1428 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1429 unsigned int pgbase
, unsigned int pglen
)
1431 struct nfs4_exception exception
= { };
1434 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1435 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1437 } while (exception
.retry
);
1441 static int _nfs4_proc_read(struct nfs_read_data
*rdata
)
1443 int flags
= rdata
->flags
;
1444 struct inode
*inode
= rdata
->inode
;
1445 struct nfs_fattr
*fattr
= rdata
->res
.fattr
;
1446 struct nfs_server
*server
= NFS_SERVER(inode
);
1447 struct rpc_message msg
= {
1448 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
1449 .rpc_argp
= &rdata
->args
,
1450 .rpc_resp
= &rdata
->res
,
1451 .rpc_cred
= rdata
->cred
,
1453 unsigned long timestamp
= jiffies
;
1456 dprintk("NFS call read %d @ %Ld\n", rdata
->args
.count
,
1457 (long long) rdata
->args
.offset
);
1460 status
= rpc_call_sync(server
->client
, &msg
, flags
);
1462 renew_lease(server
, timestamp
);
1463 dprintk("NFS reply read: %d\n", status
);
1467 static int nfs4_proc_read(struct nfs_read_data
*rdata
)
1469 struct nfs4_exception exception
= { };
1472 err
= nfs4_handle_exception(NFS_SERVER(rdata
->inode
),
1473 _nfs4_proc_read(rdata
),
1475 } while (exception
.retry
);
1479 static int _nfs4_proc_write(struct nfs_write_data
*wdata
)
1481 int rpcflags
= wdata
->flags
;
1482 struct inode
*inode
= wdata
->inode
;
1483 struct nfs_fattr
*fattr
= wdata
->res
.fattr
;
1484 struct nfs_server
*server
= NFS_SERVER(inode
);
1485 struct rpc_message msg
= {
1486 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
1487 .rpc_argp
= &wdata
->args
,
1488 .rpc_resp
= &wdata
->res
,
1489 .rpc_cred
= wdata
->cred
,
1493 dprintk("NFS call write %d @ %Ld\n", wdata
->args
.count
,
1494 (long long) wdata
->args
.offset
);
1497 status
= rpc_call_sync(server
->client
, &msg
, rpcflags
);
1498 dprintk("NFS reply write: %d\n", status
);
1502 static int nfs4_proc_write(struct nfs_write_data
*wdata
)
1504 struct nfs4_exception exception
= { };
1507 err
= nfs4_handle_exception(NFS_SERVER(wdata
->inode
),
1508 _nfs4_proc_write(wdata
),
1510 } while (exception
.retry
);
1514 static int _nfs4_proc_commit(struct nfs_write_data
*cdata
)
1516 struct inode
*inode
= cdata
->inode
;
1517 struct nfs_fattr
*fattr
= cdata
->res
.fattr
;
1518 struct nfs_server
*server
= NFS_SERVER(inode
);
1519 struct rpc_message msg
= {
1520 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
1521 .rpc_argp
= &cdata
->args
,
1522 .rpc_resp
= &cdata
->res
,
1523 .rpc_cred
= cdata
->cred
,
1527 dprintk("NFS call commit %d @ %Ld\n", cdata
->args
.count
,
1528 (long long) cdata
->args
.offset
);
1531 status
= rpc_call_sync(server
->client
, &msg
, 0);
1532 dprintk("NFS reply commit: %d\n", status
);
1536 static int nfs4_proc_commit(struct nfs_write_data
*cdata
)
1538 struct nfs4_exception exception
= { };
1541 err
= nfs4_handle_exception(NFS_SERVER(cdata
->inode
),
1542 _nfs4_proc_commit(cdata
),
1544 } while (exception
.retry
);
1550 * We will need to arrange for the VFS layer to provide an atomic open.
1551 * Until then, this create/open method is prone to inefficiency and race
1552 * conditions due to the lookup, create, and open VFS calls from sys_open()
1553 * placed on the wire.
1555 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1556 * The file will be opened again in the subsequent VFS open call
1557 * (nfs4_proc_file_open).
1559 * The open for read will just hang around to be used by any process that
1560 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1564 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1565 int flags
, struct nameidata
*nd
)
1567 struct nfs4_state
*state
;
1568 struct rpc_cred
*cred
;
1571 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1573 status
= PTR_ERR(cred
);
1576 state
= nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
);
1578 if (IS_ERR(state
)) {
1579 status
= PTR_ERR(state
);
1582 d_instantiate(dentry
, state
->inode
);
1583 if (flags
& O_EXCL
) {
1584 struct nfs_fattr fattr
;
1585 status
= nfs4_do_setattr(NFS_SERVER(dir
), &fattr
,
1586 NFS_FH(state
->inode
), sattr
, state
);
1588 nfs_setattr_update_inode(state
->inode
, sattr
);
1590 if (status
== 0 && nd
!= NULL
&& (nd
->flags
& LOOKUP_OPEN
))
1591 nfs4_intent_set_file(nd
, dentry
, state
);
1593 nfs4_close_state(state
, flags
);
1598 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1600 struct nfs4_remove_arg args
= {
1604 struct nfs4_change_info res
;
1605 struct rpc_message msg
= {
1606 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1612 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1614 update_changeattr(dir
, &res
);
1618 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1620 struct nfs4_exception exception
= { };
1623 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1624 _nfs4_proc_remove(dir
, name
),
1626 } while (exception
.retry
);
1630 struct unlink_desc
{
1631 struct nfs4_remove_arg args
;
1632 struct nfs4_change_info res
;
1635 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1638 struct unlink_desc
*up
;
1640 up
= (struct unlink_desc
*) kmalloc(sizeof(*up
), GFP_KERNEL
);
1644 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1645 up
->args
.name
= name
;
1647 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1648 msg
->rpc_argp
= &up
->args
;
1649 msg
->rpc_resp
= &up
->res
;
1653 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1655 struct rpc_message
*msg
= &task
->tk_msg
;
1656 struct unlink_desc
*up
;
1658 if (msg
->rpc_resp
!= NULL
) {
1659 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1660 update_changeattr(dir
->d_inode
, &up
->res
);
1662 msg
->rpc_resp
= NULL
;
1663 msg
->rpc_argp
= NULL
;
1668 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1669 struct inode
*new_dir
, struct qstr
*new_name
)
1671 struct nfs4_rename_arg arg
= {
1672 .old_dir
= NFS_FH(old_dir
),
1673 .new_dir
= NFS_FH(new_dir
),
1674 .old_name
= old_name
,
1675 .new_name
= new_name
,
1677 struct nfs4_rename_res res
= { };
1678 struct rpc_message msg
= {
1679 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
1685 status
= rpc_call_sync(NFS_CLIENT(old_dir
), &msg
, 0);
1688 update_changeattr(old_dir
, &res
.old_cinfo
);
1689 update_changeattr(new_dir
, &res
.new_cinfo
);
1694 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1695 struct inode
*new_dir
, struct qstr
*new_name
)
1697 struct nfs4_exception exception
= { };
1700 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
1701 _nfs4_proc_rename(old_dir
, old_name
,
1704 } while (exception
.retry
);
1708 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1710 struct nfs4_link_arg arg
= {
1711 .fh
= NFS_FH(inode
),
1712 .dir_fh
= NFS_FH(dir
),
1715 struct nfs4_change_info cinfo
= { };
1716 struct rpc_message msg
= {
1717 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
1723 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1725 update_changeattr(dir
, &cinfo
);
1730 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1732 struct nfs4_exception exception
= { };
1735 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1736 _nfs4_proc_link(inode
, dir
, name
),
1738 } while (exception
.retry
);
1742 static int _nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1743 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1744 struct nfs_fattr
*fattr
)
1746 struct nfs_server
*server
= NFS_SERVER(dir
);
1747 struct nfs4_create_arg arg
= {
1748 .dir_fh
= NFS_FH(dir
),
1753 .bitmask
= server
->attr_bitmask
,
1755 struct nfs4_create_res res
= {
1760 struct rpc_message msg
= {
1761 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
1767 if (path
->len
> NFS4_MAXPATHLEN
)
1768 return -ENAMETOOLONG
;
1769 arg
.u
.symlink
= path
;
1772 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1774 update_changeattr(dir
, &res
.dir_cinfo
);
1778 static int nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1779 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1780 struct nfs_fattr
*fattr
)
1782 struct nfs4_exception exception
= { };
1785 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1786 _nfs4_proc_symlink(dir
, name
, path
, sattr
,
1789 } while (exception
.retry
);
1793 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1794 struct iattr
*sattr
)
1796 struct nfs_server
*server
= NFS_SERVER(dir
);
1797 struct nfs_fh fhandle
;
1798 struct nfs_fattr fattr
;
1799 struct nfs4_create_arg arg
= {
1800 .dir_fh
= NFS_FH(dir
),
1802 .name
= &dentry
->d_name
,
1805 .bitmask
= server
->attr_bitmask
,
1807 struct nfs4_create_res res
= {
1812 struct rpc_message msg
= {
1813 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1821 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1823 update_changeattr(dir
, &res
.dir_cinfo
);
1824 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
1829 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1830 struct iattr
*sattr
)
1832 struct nfs4_exception exception
= { };
1835 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1836 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
1838 } while (exception
.retry
);
1842 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1843 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1845 struct inode
*dir
= dentry
->d_inode
;
1846 struct nfs4_readdir_arg args
= {
1851 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
1853 struct nfs4_readdir_res res
;
1854 struct rpc_message msg
= {
1855 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
1862 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
1863 dentry
->d_parent
->d_name
.name
,
1864 dentry
->d_name
.name
,
1865 (unsigned long long)cookie
);
1867 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
1868 res
.pgbase
= args
.pgbase
;
1869 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1871 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
1873 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
1877 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1878 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1880 struct nfs4_exception exception
= { };
1883 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
1884 _nfs4_proc_readdir(dentry
, cred
, cookie
,
1887 } while (exception
.retry
);
1891 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
1892 struct iattr
*sattr
, dev_t rdev
)
1894 struct nfs_server
*server
= NFS_SERVER(dir
);
1896 struct nfs_fattr fattr
;
1897 struct nfs4_create_arg arg
= {
1898 .dir_fh
= NFS_FH(dir
),
1900 .name
= &dentry
->d_name
,
1902 .bitmask
= server
->attr_bitmask
,
1904 struct nfs4_create_res res
= {
1909 struct rpc_message msg
= {
1910 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1915 int mode
= sattr
->ia_mode
;
1919 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
1920 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
1922 arg
.ftype
= NF4FIFO
;
1923 else if (S_ISBLK(mode
)) {
1925 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1926 arg
.u
.device
.specdata2
= MINOR(rdev
);
1928 else if (S_ISCHR(mode
)) {
1930 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1931 arg
.u
.device
.specdata2
= MINOR(rdev
);
1934 arg
.ftype
= NF4SOCK
;
1936 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1938 update_changeattr(dir
, &res
.dir_cinfo
);
1939 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
1944 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
1945 struct iattr
*sattr
, dev_t rdev
)
1947 struct nfs4_exception exception
= { };
1950 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1951 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
1953 } while (exception
.retry
);
1957 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1958 struct nfs_fsstat
*fsstat
)
1960 struct nfs4_statfs_arg args
= {
1962 .bitmask
= server
->attr_bitmask
,
1964 struct rpc_message msg
= {
1965 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
1970 fsstat
->fattr
->valid
= 0;
1971 return rpc_call_sync(server
->client
, &msg
, 0);
1974 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
1976 struct nfs4_exception exception
= { };
1979 err
= nfs4_handle_exception(server
,
1980 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
1982 } while (exception
.retry
);
1986 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1987 struct nfs_fsinfo
*fsinfo
)
1989 struct nfs4_fsinfo_arg args
= {
1991 .bitmask
= server
->attr_bitmask
,
1993 struct rpc_message msg
= {
1994 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
1999 return rpc_call_sync(server
->client
, &msg
, 0);
2002 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2004 struct nfs4_exception exception
= { };
2008 err
= nfs4_handle_exception(server
,
2009 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2011 } while (exception
.retry
);
2015 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2017 fsinfo
->fattr
->valid
= 0;
2018 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2021 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2022 struct nfs_pathconf
*pathconf
)
2024 struct nfs4_pathconf_arg args
= {
2026 .bitmask
= server
->attr_bitmask
,
2028 struct rpc_message msg
= {
2029 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2031 .rpc_resp
= pathconf
,
2034 /* None of the pathconf attributes are mandatory to implement */
2035 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2036 memset(pathconf
, 0, sizeof(*pathconf
));
2040 pathconf
->fattr
->valid
= 0;
2041 return rpc_call_sync(server
->client
, &msg
, 0);
2044 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2045 struct nfs_pathconf
*pathconf
)
2047 struct nfs4_exception exception
= { };
2051 err
= nfs4_handle_exception(server
,
2052 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2054 } while (exception
.retry
);
2059 nfs4_read_done(struct rpc_task
*task
)
2061 struct nfs_read_data
*data
= (struct nfs_read_data
*) task
->tk_calldata
;
2062 struct inode
*inode
= data
->inode
;
2064 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2065 rpc_restart_call(task
);
2068 if (task
->tk_status
> 0)
2069 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2070 /* Call back common NFS readpage processing */
2071 nfs_readpage_result(task
);
2075 nfs4_proc_read_setup(struct nfs_read_data
*data
)
2077 struct rpc_task
*task
= &data
->task
;
2078 struct rpc_message msg
= {
2079 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2080 .rpc_argp
= &data
->args
,
2081 .rpc_resp
= &data
->res
,
2082 .rpc_cred
= data
->cred
,
2084 struct inode
*inode
= data
->inode
;
2087 data
->timestamp
= jiffies
;
2089 /* N.B. Do we need to test? Never called for swapfile inode */
2090 flags
= RPC_TASK_ASYNC
| (IS_SWAPFILE(inode
)? NFS_RPC_SWAPFLAGS
: 0);
2092 /* Finalize the task. */
2093 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_read_done
, flags
);
2094 rpc_call_setup(task
, &msg
, 0);
2098 nfs4_write_done(struct rpc_task
*task
)
2100 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2101 struct inode
*inode
= data
->inode
;
2103 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2104 rpc_restart_call(task
);
2107 if (task
->tk_status
>= 0)
2108 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2109 /* Call back common NFS writeback processing */
2110 nfs_writeback_done(task
);
2114 nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2116 struct rpc_task
*task
= &data
->task
;
2117 struct rpc_message msg
= {
2118 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2119 .rpc_argp
= &data
->args
,
2120 .rpc_resp
= &data
->res
,
2121 .rpc_cred
= data
->cred
,
2123 struct inode
*inode
= data
->inode
;
2127 if (how
& FLUSH_STABLE
) {
2128 if (!NFS_I(inode
)->ncommit
)
2129 stable
= NFS_FILE_SYNC
;
2131 stable
= NFS_DATA_SYNC
;
2133 stable
= NFS_UNSTABLE
;
2134 data
->args
.stable
= stable
;
2136 data
->timestamp
= jiffies
;
2138 /* Set the initial flags for the task. */
2139 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2141 /* Finalize the task. */
2142 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_write_done
, flags
);
2143 rpc_call_setup(task
, &msg
, 0);
2147 nfs4_commit_done(struct rpc_task
*task
)
2149 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2150 struct inode
*inode
= data
->inode
;
2152 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2153 rpc_restart_call(task
);
2156 /* Call back common NFS writeback processing */
2157 nfs_commit_done(task
);
2161 nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2163 struct rpc_task
*task
= &data
->task
;
2164 struct rpc_message msg
= {
2165 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2166 .rpc_argp
= &data
->args
,
2167 .rpc_resp
= &data
->res
,
2168 .rpc_cred
= data
->cred
,
2170 struct inode
*inode
= data
->inode
;
2173 /* Set the initial flags for the task. */
2174 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2176 /* Finalize the task. */
2177 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_commit_done
, flags
);
2178 rpc_call_setup(task
, &msg
, 0);
2182 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2183 * standalone procedure for queueing an asynchronous RENEW.
2186 renew_done(struct rpc_task
*task
)
2188 struct nfs4_client
*clp
= (struct nfs4_client
*)task
->tk_msg
.rpc_argp
;
2189 unsigned long timestamp
= (unsigned long)task
->tk_calldata
;
2191 if (task
->tk_status
< 0) {
2192 switch (task
->tk_status
) {
2193 case -NFS4ERR_STALE_CLIENTID
:
2194 case -NFS4ERR_EXPIRED
:
2195 case -NFS4ERR_CB_PATH_DOWN
:
2196 nfs4_schedule_state_recovery(clp
);
2200 spin_lock(&clp
->cl_lock
);
2201 if (time_before(clp
->cl_last_renewal
,timestamp
))
2202 clp
->cl_last_renewal
= timestamp
;
2203 spin_unlock(&clp
->cl_lock
);
2207 nfs4_proc_async_renew(struct nfs4_client
*clp
)
2209 struct rpc_message msg
= {
2210 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2212 .rpc_cred
= clp
->cl_cred
,
2215 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2216 renew_done
, (void *)jiffies
);
2220 nfs4_proc_renew(struct nfs4_client
*clp
)
2222 struct rpc_message msg
= {
2223 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2225 .rpc_cred
= clp
->cl_cred
,
2227 unsigned long now
= jiffies
;
2230 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2233 spin_lock(&clp
->cl_lock
);
2234 if (time_before(clp
->cl_last_renewal
,now
))
2235 clp
->cl_last_renewal
= now
;
2236 spin_unlock(&clp
->cl_lock
);
2240 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2242 return (server
->caps
& NFS_CAP_ACLS
)
2243 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2244 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2247 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2248 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2251 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2253 static void buf_to_pages(const void *buf
, size_t buflen
,
2254 struct page
**pages
, unsigned int *pgbase
)
2256 const void *p
= buf
;
2258 *pgbase
= offset_in_page(buf
);
2260 while (p
< buf
+ buflen
) {
2261 *(pages
++) = virt_to_page(p
);
2262 p
+= PAGE_CACHE_SIZE
;
2266 struct nfs4_cached_acl
{
2272 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2274 struct nfs_inode
*nfsi
= NFS_I(inode
);
2276 spin_lock(&inode
->i_lock
);
2277 kfree(nfsi
->nfs4_acl
);
2278 nfsi
->nfs4_acl
= acl
;
2279 spin_unlock(&inode
->i_lock
);
2282 static void nfs4_zap_acl_attr(struct inode
*inode
)
2284 nfs4_set_cached_acl(inode
, NULL
);
2287 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2289 struct nfs_inode
*nfsi
= NFS_I(inode
);
2290 struct nfs4_cached_acl
*acl
;
2293 spin_lock(&inode
->i_lock
);
2294 acl
= nfsi
->nfs4_acl
;
2297 if (buf
== NULL
) /* user is just asking for length */
2299 if (acl
->cached
== 0)
2301 ret
= -ERANGE
; /* see getxattr(2) man page */
2302 if (acl
->len
> buflen
)
2304 memcpy(buf
, acl
->data
, acl
->len
);
2308 spin_unlock(&inode
->i_lock
);
2312 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2314 struct nfs4_cached_acl
*acl
;
2316 if (buf
&& acl_len
<= PAGE_SIZE
) {
2317 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2321 memcpy(acl
->data
, buf
, acl_len
);
2323 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2330 nfs4_set_cached_acl(inode
, acl
);
2333 static inline ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2335 struct page
*pages
[NFS4ACL_MAXPAGES
];
2336 struct nfs_getaclargs args
= {
2337 .fh
= NFS_FH(inode
),
2341 size_t resp_len
= buflen
;
2343 struct rpc_message msg
= {
2344 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2346 .rpc_resp
= &resp_len
,
2348 struct page
*localpage
= NULL
;
2351 if (buflen
< PAGE_SIZE
) {
2352 /* As long as we're doing a round trip to the server anyway,
2353 * let's be prepared for a page of acl data. */
2354 localpage
= alloc_page(GFP_KERNEL
);
2355 resp_buf
= page_address(localpage
);
2356 if (localpage
== NULL
)
2358 args
.acl_pages
[0] = localpage
;
2359 args
.acl_pgbase
= 0;
2360 resp_len
= args
.acl_len
= PAGE_SIZE
;
2363 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2365 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2368 if (resp_len
> args
.acl_len
)
2369 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2371 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2374 if (resp_len
> buflen
)
2377 memcpy(buf
, resp_buf
, resp_len
);
2382 __free_page(localpage
);
2386 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2388 struct nfs_server
*server
= NFS_SERVER(inode
);
2391 if (!nfs4_server_supports_acls(server
))
2393 ret
= nfs_revalidate_inode(server
, inode
);
2396 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2399 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2402 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2404 struct nfs_server
*server
= NFS_SERVER(inode
);
2405 struct page
*pages
[NFS4ACL_MAXPAGES
];
2406 struct nfs_setaclargs arg
= {
2407 .fh
= NFS_FH(inode
),
2411 struct rpc_message msg
= {
2412 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2418 if (!nfs4_server_supports_acls(server
))
2420 nfs_inode_return_delegation(inode
);
2421 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2422 ret
= rpc_call_sync(NFS_SERVER(inode
)->client
, &msg
, 0);
2424 nfs4_write_cached_acl(inode
, buf
, buflen
);
2429 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2431 struct nfs4_client
*clp
= server
->nfs4_state
;
2433 if (!clp
|| task
->tk_status
>= 0)
2435 switch(task
->tk_status
) {
2436 case -NFS4ERR_STALE_CLIENTID
:
2437 case -NFS4ERR_STALE_STATEID
:
2438 case -NFS4ERR_EXPIRED
:
2439 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2440 nfs4_schedule_state_recovery(clp
);
2441 if (test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2442 rpc_wake_up_task(task
);
2443 task
->tk_status
= 0;
2445 case -NFS4ERR_GRACE
:
2446 case -NFS4ERR_DELAY
:
2447 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2448 task
->tk_status
= 0;
2450 case -NFS4ERR_OLD_STATEID
:
2451 task
->tk_status
= 0;
2454 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2458 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs4_client
*clp
)
2462 int interruptible
, res
= 0;
2466 rpc_clnt_sigmask(clnt
, &oldset
);
2467 interruptible
= TASK_UNINTERRUPTIBLE
;
2469 interruptible
= TASK_INTERRUPTIBLE
;
2470 prepare_to_wait(&clp
->cl_waitq
, &wait
, interruptible
);
2471 nfs4_schedule_state_recovery(clp
);
2472 if (clnt
->cl_intr
&& signalled())
2474 else if (!test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2476 finish_wait(&clp
->cl_waitq
, &wait
);
2477 rpc_clnt_sigunmask(clnt
, &oldset
);
2481 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2489 *timeout
= NFS4_POLL_RETRY_MIN
;
2490 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2491 *timeout
= NFS4_POLL_RETRY_MAX
;
2492 rpc_clnt_sigmask(clnt
, &oldset
);
2493 if (clnt
->cl_intr
) {
2494 schedule_timeout_interruptible(*timeout
);
2498 schedule_timeout_uninterruptible(*timeout
);
2499 rpc_clnt_sigunmask(clnt
, &oldset
);
2504 /* This is the error handling routine for processes that are allowed
2507 int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2509 struct nfs4_client
*clp
= server
->nfs4_state
;
2510 int ret
= errorcode
;
2512 exception
->retry
= 0;
2516 case -NFS4ERR_STALE_CLIENTID
:
2517 case -NFS4ERR_STALE_STATEID
:
2518 case -NFS4ERR_EXPIRED
:
2519 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2521 exception
->retry
= 1;
2523 case -NFS4ERR_GRACE
:
2524 case -NFS4ERR_DELAY
:
2525 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2527 exception
->retry
= 1;
2529 case -NFS4ERR_OLD_STATEID
:
2531 exception
->retry
= 1;
2533 /* We failed to handle the error */
2534 return nfs4_map_errors(ret
);
2537 int nfs4_proc_setclientid(struct nfs4_client
*clp
, u32 program
, unsigned short port
)
2539 nfs4_verifier sc_verifier
;
2540 struct nfs4_setclientid setclientid
= {
2541 .sc_verifier
= &sc_verifier
,
2544 struct rpc_message msg
= {
2545 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2546 .rpc_argp
= &setclientid
,
2548 .rpc_cred
= clp
->cl_cred
,
2554 p
= (u32
*)sc_verifier
.data
;
2555 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2556 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2559 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2560 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2561 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.s_addr
),
2562 clp
->cl_cred
->cr_ops
->cr_name
,
2563 clp
->cl_id_uniquifier
);
2564 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2565 sizeof(setclientid
.sc_netid
), "tcp");
2566 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2567 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2568 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2570 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2571 if (status
!= -NFS4ERR_CLID_INUSE
)
2576 ssleep(clp
->cl_lease_time
+ 1);
2578 if (++clp
->cl_id_uniquifier
== 0)
2585 nfs4_proc_setclientid_confirm(struct nfs4_client
*clp
)
2587 struct nfs_fsinfo fsinfo
;
2588 struct rpc_message msg
= {
2589 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2591 .rpc_resp
= &fsinfo
,
2592 .rpc_cred
= clp
->cl_cred
,
2598 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2600 spin_lock(&clp
->cl_lock
);
2601 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2602 clp
->cl_last_renewal
= now
;
2603 spin_unlock(&clp
->cl_lock
);
2608 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2610 struct nfs4_delegreturnargs args
= {
2611 .fhandle
= NFS_FH(inode
),
2614 struct rpc_message msg
= {
2615 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
2620 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2623 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2625 struct nfs_server
*server
= NFS_SERVER(inode
);
2626 struct nfs4_exception exception
= { };
2629 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
2631 case -NFS4ERR_STALE_STATEID
:
2632 case -NFS4ERR_EXPIRED
:
2633 nfs4_schedule_state_recovery(server
->nfs4_state
);
2637 err
= nfs4_handle_exception(server
, err
, &exception
);
2638 } while (exception
.retry
);
2642 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2643 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2646 * sleep, with exponential backoff, and retry the LOCK operation.
2648 static unsigned long
2649 nfs4_set_lock_task_retry(unsigned long timeout
)
2651 schedule_timeout_interruptible(timeout
);
2653 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
2654 return NFS4_LOCK_MAXTIMEOUT
;
2659 nfs4_lck_type(int cmd
, struct file_lock
*request
)
2662 switch (request
->fl_type
) {
2664 return IS_SETLKW(cmd
) ? NFS4_READW_LT
: NFS4_READ_LT
;
2666 return IS_SETLKW(cmd
) ? NFS4_WRITEW_LT
: NFS4_WRITE_LT
;
2668 return NFS4_WRITE_LT
;
2674 static inline uint64_t
2675 nfs4_lck_length(struct file_lock
*request
)
2677 if (request
->fl_end
== OFFSET_MAX
)
2678 return ~(uint64_t)0;
2679 return request
->fl_end
- request
->fl_start
+ 1;
2682 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2684 struct inode
*inode
= state
->inode
;
2685 struct nfs_server
*server
= NFS_SERVER(inode
);
2686 struct nfs4_client
*clp
= server
->nfs4_state
;
2687 struct nfs_lockargs arg
= {
2688 .fh
= NFS_FH(inode
),
2689 .type
= nfs4_lck_type(cmd
, request
),
2690 .offset
= request
->fl_start
,
2691 .length
= nfs4_lck_length(request
),
2693 struct nfs_lockres res
= {
2696 struct rpc_message msg
= {
2697 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
2700 .rpc_cred
= state
->owner
->so_cred
,
2702 struct nfs_lowner nlo
;
2703 struct nfs4_lock_state
*lsp
;
2706 down_read(&clp
->cl_sem
);
2707 nlo
.clientid
= clp
->cl_clientid
;
2708 status
= nfs4_set_lock_state(state
, request
);
2711 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2712 nlo
.id
= lsp
->ls_id
;
2714 status
= rpc_call_sync(server
->client
, &msg
, 0);
2716 request
->fl_type
= F_UNLCK
;
2717 } else if (status
== -NFS4ERR_DENIED
) {
2718 int64_t len
, start
, end
;
2719 start
= res
.u
.denied
.offset
;
2720 len
= res
.u
.denied
.length
;
2721 end
= start
+ len
- 1;
2722 if (end
< 0 || len
== 0)
2723 request
->fl_end
= OFFSET_MAX
;
2725 request
->fl_end
= (loff_t
)end
;
2726 request
->fl_start
= (loff_t
)start
;
2727 request
->fl_type
= F_WRLCK
;
2728 if (res
.u
.denied
.type
& 1)
2729 request
->fl_type
= F_RDLCK
;
2730 request
->fl_pid
= 0;
2734 up_read(&clp
->cl_sem
);
2738 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2740 struct nfs4_exception exception
= { };
2744 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
2745 _nfs4_proc_getlk(state
, cmd
, request
),
2747 } while (exception
.retry
);
2751 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
2754 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
2756 res
= posix_lock_file_wait(file
, fl
);
2759 res
= flock_lock_file_wait(file
, fl
);
2765 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n",
2770 struct nfs4_unlockdata
{
2771 struct nfs_lockargs arg
;
2772 struct nfs_locku_opargs luargs
;
2773 struct nfs_lockres res
;
2774 struct nfs4_lock_state
*lsp
;
2775 struct nfs_open_context
*ctx
;
2777 struct completion completion
;
2780 static void nfs4_locku_release_calldata(struct nfs4_unlockdata
*calldata
)
2782 if (atomic_dec_and_test(&calldata
->refcount
)) {
2783 nfs_free_seqid(calldata
->luargs
.seqid
);
2784 nfs4_put_lock_state(calldata
->lsp
);
2785 put_nfs_open_context(calldata
->ctx
);
2790 static void nfs4_locku_complete(struct nfs4_unlockdata
*calldata
)
2792 complete(&calldata
->completion
);
2793 nfs4_locku_release_calldata(calldata
);
2796 static void nfs4_locku_done(struct rpc_task
*task
)
2798 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2800 nfs_increment_lock_seqid(task
->tk_status
, calldata
->luargs
.seqid
);
2801 switch (task
->tk_status
) {
2803 memcpy(calldata
->lsp
->ls_stateid
.data
,
2804 calldata
->res
.u
.stateid
.data
,
2805 sizeof(calldata
->lsp
->ls_stateid
.data
));
2807 case -NFS4ERR_STALE_STATEID
:
2808 case -NFS4ERR_EXPIRED
:
2809 nfs4_schedule_state_recovery(calldata
->res
.server
->nfs4_state
);
2812 if (nfs4_async_handle_error(task
, calldata
->res
.server
) == -EAGAIN
) {
2813 rpc_restart_call(task
);
2817 nfs4_locku_complete(calldata
);
2820 static void nfs4_locku_begin(struct rpc_task
*task
)
2822 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2823 struct rpc_message msg
= {
2824 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
2825 .rpc_argp
= &calldata
->arg
,
2826 .rpc_resp
= &calldata
->res
,
2827 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
2831 status
= nfs_wait_on_sequence(calldata
->luargs
.seqid
, task
);
2834 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
2835 nfs4_locku_complete(calldata
);
2836 task
->tk_exit
= NULL
;
2840 rpc_call_setup(task
, &msg
, 0);
2843 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2845 struct nfs4_unlockdata
*calldata
;
2846 struct inode
*inode
= state
->inode
;
2847 struct nfs_server
*server
= NFS_SERVER(inode
);
2848 struct nfs4_lock_state
*lsp
;
2851 status
= nfs4_set_lock_state(state
, request
);
2854 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2855 /* We might have lost the locks! */
2856 if ((lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0)
2858 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
2859 if (calldata
== NULL
)
2861 calldata
->luargs
.seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
2862 if (calldata
->luargs
.seqid
== NULL
) {
2866 calldata
->luargs
.stateid
= &lsp
->ls_stateid
;
2867 calldata
->arg
.fh
= NFS_FH(inode
);
2868 calldata
->arg
.type
= nfs4_lck_type(cmd
, request
);
2869 calldata
->arg
.offset
= request
->fl_start
;
2870 calldata
->arg
.length
= nfs4_lck_length(request
);
2871 calldata
->arg
.u
.locku
= &calldata
->luargs
;
2872 calldata
->res
.server
= server
;
2873 calldata
->lsp
= lsp
;
2874 atomic_inc(&lsp
->ls_count
);
2876 /* Ensure we don't close file until we're done freeing locks! */
2877 calldata
->ctx
= get_nfs_open_context((struct nfs_open_context
*)request
->fl_file
->private_data
);
2879 atomic_set(&calldata
->refcount
, 2);
2880 init_completion(&calldata
->completion
);
2882 status
= nfs4_call_async(NFS_SERVER(inode
)->client
, nfs4_locku_begin
,
2883 nfs4_locku_done
, calldata
);
2885 wait_for_completion_interruptible(&calldata
->completion
);
2886 do_vfs_lock(request
->fl_file
, request
);
2887 nfs4_locku_release_calldata(calldata
);
2891 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
, int reclaim
)
2893 struct inode
*inode
= state
->inode
;
2894 struct nfs_server
*server
= NFS_SERVER(inode
);
2895 struct nfs4_lock_state
*lsp
= request
->fl_u
.nfs4_fl
.owner
;
2896 struct nfs_lock_opargs largs
= {
2897 .lock_stateid
= &lsp
->ls_stateid
,
2898 .open_stateid
= &state
->stateid
,
2900 .clientid
= server
->nfs4_state
->cl_clientid
,
2905 struct nfs_lockargs arg
= {
2906 .fh
= NFS_FH(inode
),
2907 .type
= nfs4_lck_type(cmd
, request
),
2908 .offset
= request
->fl_start
,
2909 .length
= nfs4_lck_length(request
),
2914 struct nfs_lockres res
= {
2917 struct rpc_message msg
= {
2918 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
2921 .rpc_cred
= state
->owner
->so_cred
,
2923 int status
= -ENOMEM
;
2925 largs
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
2926 if (largs
.lock_seqid
== NULL
)
2928 if (!(lsp
->ls_seqid
.flags
& NFS_SEQID_CONFIRMED
)) {
2929 struct nfs4_state_owner
*owner
= state
->owner
;
2931 largs
.open_seqid
= nfs_alloc_seqid(&owner
->so_seqid
);
2932 if (largs
.open_seqid
== NULL
)
2934 largs
.new_lock_owner
= 1;
2935 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
2936 /* increment open seqid on success, and seqid mutating errors */
2937 if (largs
.new_lock_owner
!= 0) {
2938 nfs_increment_open_seqid(status
, largs
.open_seqid
);
2940 nfs_confirm_seqid(&lsp
->ls_seqid
, 0);
2942 nfs_free_seqid(largs
.open_seqid
);
2944 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
2945 /* increment lock seqid on success, and seqid mutating errors*/
2946 nfs_increment_lock_seqid(status
, largs
.lock_seqid
);
2947 /* save the returned stateid. */
2949 memcpy(lsp
->ls_stateid
.data
, res
.u
.stateid
.data
,
2950 sizeof(lsp
->ls_stateid
.data
));
2951 lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
2952 } else if (status
== -NFS4ERR_DENIED
)
2955 nfs_free_seqid(largs
.lock_seqid
);
2959 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
2961 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
2962 struct nfs4_exception exception
= { };
2966 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
2967 if (err
!= -NFS4ERR_DELAY
)
2969 nfs4_handle_exception(server
, err
, &exception
);
2970 } while (exception
.retry
);
2974 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
2976 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
2977 struct nfs4_exception exception
= { };
2981 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
2982 if (err
!= -NFS4ERR_DELAY
)
2984 nfs4_handle_exception(server
, err
, &exception
);
2985 } while (exception
.retry
);
2989 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2991 struct nfs4_client
*clp
= state
->owner
->so_client
;
2994 down_read(&clp
->cl_sem
);
2995 status
= nfs4_set_lock_state(state
, request
);
2997 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
2999 /* Note: we always want to sleep here! */
3000 request
->fl_flags
|= FL_SLEEP
;
3001 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3002 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3004 up_read(&clp
->cl_sem
);
3008 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3010 struct nfs4_exception exception
= { };
3014 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3015 _nfs4_proc_setlk(state
, cmd
, request
),
3017 } while (exception
.retry
);
3022 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3024 struct nfs_open_context
*ctx
;
3025 struct nfs4_state
*state
;
3026 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3029 /* verify open state */
3030 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3033 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3037 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3039 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3042 if (request
->fl_type
== F_UNLCK
)
3043 return nfs4_proc_unlck(state
, cmd
, request
);
3046 status
= nfs4_proc_setlk(state
, cmd
, request
);
3047 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3049 timeout
= nfs4_set_lock_task_retry(timeout
);
3050 status
= -ERESTARTSYS
;
3053 } while(status
< 0);
3058 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3060 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3061 size_t buflen
, int flags
)
3063 struct inode
*inode
= dentry
->d_inode
;
3065 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3068 if (!S_ISREG(inode
->i_mode
) &&
3069 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3072 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3075 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3076 * and that's what we'll do for e.g. user attributes that haven't been set.
3077 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3078 * attributes in kernel-managed attribute namespaces. */
3079 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3082 struct inode
*inode
= dentry
->d_inode
;
3084 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3087 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3090 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3092 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3094 if (buf
&& buflen
< len
)
3097 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3101 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3102 .recover_open
= nfs4_open_reclaim
,
3103 .recover_lock
= nfs4_lock_reclaim
,
3106 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3107 .recover_open
= nfs4_open_expired
,
3108 .recover_lock
= nfs4_lock_expired
,
3111 static struct inode_operations nfs4_file_inode_operations
= {
3112 .permission
= nfs_permission
,
3113 .getattr
= nfs_getattr
,
3114 .setattr
= nfs_setattr
,
3115 .getxattr
= nfs4_getxattr
,
3116 .setxattr
= nfs4_setxattr
,
3117 .listxattr
= nfs4_listxattr
,
3120 struct nfs_rpc_ops nfs_v4_clientops
= {
3121 .version
= 4, /* protocol version */
3122 .dentry_ops
= &nfs4_dentry_operations
,
3123 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3124 .file_inode_ops
= &nfs4_file_inode_operations
,
3125 .getroot
= nfs4_proc_get_root
,
3126 .getattr
= nfs4_proc_getattr
,
3127 .setattr
= nfs4_proc_setattr
,
3128 .lookup
= nfs4_proc_lookup
,
3129 .access
= nfs4_proc_access
,
3130 .readlink
= nfs4_proc_readlink
,
3131 .read
= nfs4_proc_read
,
3132 .write
= nfs4_proc_write
,
3133 .commit
= nfs4_proc_commit
,
3134 .create
= nfs4_proc_create
,
3135 .remove
= nfs4_proc_remove
,
3136 .unlink_setup
= nfs4_proc_unlink_setup
,
3137 .unlink_done
= nfs4_proc_unlink_done
,
3138 .rename
= nfs4_proc_rename
,
3139 .link
= nfs4_proc_link
,
3140 .symlink
= nfs4_proc_symlink
,
3141 .mkdir
= nfs4_proc_mkdir
,
3142 .rmdir
= nfs4_proc_remove
,
3143 .readdir
= nfs4_proc_readdir
,
3144 .mknod
= nfs4_proc_mknod
,
3145 .statfs
= nfs4_proc_statfs
,
3146 .fsinfo
= nfs4_proc_fsinfo
,
3147 .pathconf
= nfs4_proc_pathconf
,
3148 .decode_dirent
= nfs4_decode_dirent
,
3149 .read_setup
= nfs4_proc_read_setup
,
3150 .write_setup
= nfs4_proc_write_setup
,
3151 .commit_setup
= nfs4_proc_commit_setup
,
3152 .file_open
= nfs_open
,
3153 .file_release
= nfs_release
,
3154 .lock
= nfs4_proc_lock
,
3155 .clear_acl_cache
= nfs4_zap_acl_attr
,