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(&state
->owner
->so_lock
);
216 spin_lock(&inode
->i_lock
);
217 state
->state
|= open_flags
;
218 /* NB! List reordering - see the reclaim code for why. */
219 if ((open_flags
& FMODE_WRITE
) && 0 == state
->nwriters
++)
220 list_move(&state
->open_states
, &state
->owner
->so_states
);
221 if (open_flags
& FMODE_READ
)
223 memcpy(&state
->stateid
, stateid
, sizeof(state
->stateid
));
224 spin_unlock(&inode
->i_lock
);
225 spin_unlock(&state
->owner
->so_lock
);
230 * reclaim state on the server after a reboot.
232 static int _nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
234 struct inode
*inode
= state
->inode
;
235 struct nfs_server
*server
= NFS_SERVER(inode
);
236 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
237 struct nfs_openargs o_arg
= {
240 .open_flags
= state
->state
,
241 .clientid
= server
->nfs4_state
->cl_clientid
,
242 .claim
= NFS4_OPEN_CLAIM_PREVIOUS
,
243 .bitmask
= server
->attr_bitmask
,
245 struct nfs_openres o_res
= {
246 .server
= server
, /* Grrr */
248 struct rpc_message msg
= {
249 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
252 .rpc_cred
= sp
->so_cred
,
256 if (delegation
!= NULL
) {
257 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
258 memcpy(&state
->stateid
, &delegation
->stateid
,
259 sizeof(state
->stateid
));
260 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
263 o_arg
.u
.delegation_type
= delegation
->type
;
265 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
266 if (o_arg
.seqid
== NULL
)
268 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
269 /* Confirm the sequence as being established */
270 nfs_confirm_seqid(&sp
->so_seqid
, status
);
271 nfs_increment_open_seqid(status
, o_arg
.seqid
);
273 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
274 if (o_res
.delegation_type
!= 0) {
275 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
276 /* Did the server issue an immediate delegation recall? */
278 nfs_async_inode_return_delegation(inode
, &o_res
.stateid
);
281 nfs_free_seqid(o_arg
.seqid
);
282 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
283 /* Ensure we update the inode attributes */
288 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
290 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
291 struct nfs4_exception exception
= { };
294 err
= _nfs4_open_reclaim(sp
, state
);
295 if (err
!= -NFS4ERR_DELAY
)
297 nfs4_handle_exception(server
, err
, &exception
);
298 } while (exception
.retry
);
302 static int _nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
304 struct nfs4_state_owner
*sp
= state
->owner
;
305 struct inode
*inode
= dentry
->d_inode
;
306 struct nfs_server
*server
= NFS_SERVER(inode
);
307 struct dentry
*parent
= dget_parent(dentry
);
308 struct nfs_openargs arg
= {
309 .fh
= NFS_FH(parent
->d_inode
),
310 .clientid
= server
->nfs4_state
->cl_clientid
,
311 .name
= &dentry
->d_name
,
314 .bitmask
= server
->attr_bitmask
,
315 .claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
,
317 struct nfs_openres res
= {
320 struct rpc_message msg
= {
321 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
324 .rpc_cred
= sp
->so_cred
,
328 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
330 if (state
->state
== 0)
332 arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
334 if (arg
.seqid
== NULL
)
336 arg
.open_flags
= state
->state
;
337 memcpy(arg
.u
.delegation
.data
, state
->stateid
.data
, sizeof(arg
.u
.delegation
.data
));
338 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
339 nfs_increment_open_seqid(status
, arg
.seqid
);
342 if(res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
343 status
= _nfs4_proc_open_confirm(server
->client
, NFS_FH(inode
),
344 sp
, &res
.stateid
, arg
.seqid
);
348 nfs_confirm_seqid(&sp
->so_seqid
, 0);
350 memcpy(state
->stateid
.data
, res
.stateid
.data
,
351 sizeof(state
->stateid
.data
));
352 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
355 nfs_free_seqid(arg
.seqid
);
361 int nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
363 struct nfs4_exception exception
= { };
364 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
367 err
= _nfs4_open_delegation_recall(dentry
, state
);
371 case -NFS4ERR_STALE_CLIENTID
:
372 case -NFS4ERR_STALE_STATEID
:
373 case -NFS4ERR_EXPIRED
:
374 /* Don't recall a delegation if it was lost */
375 nfs4_schedule_state_recovery(server
->nfs4_state
);
378 err
= nfs4_handle_exception(server
, err
, &exception
);
379 } while (exception
.retry
);
383 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
)
385 struct nfs_open_confirmargs arg
= {
390 struct nfs_open_confirmres res
;
391 struct rpc_message msg
= {
392 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
395 .rpc_cred
= sp
->so_cred
,
399 status
= rpc_call_sync(clnt
, &msg
, RPC_TASK_NOINTR
);
400 /* Confirm the sequence as being established */
401 nfs_confirm_seqid(&sp
->so_seqid
, status
);
402 nfs_increment_open_seqid(status
, seqid
);
404 memcpy(stateid
, &res
.stateid
, sizeof(*stateid
));
408 static int _nfs4_proc_open(struct inode
*dir
, struct nfs4_state_owner
*sp
, struct nfs_openargs
*o_arg
, struct nfs_openres
*o_res
)
410 struct nfs_server
*server
= NFS_SERVER(dir
);
411 struct rpc_message msg
= {
412 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
415 .rpc_cred
= sp
->so_cred
,
419 /* Update sequence id. The caller must serialize! */
420 o_arg
->id
= sp
->so_id
;
421 o_arg
->clientid
= sp
->so_client
->cl_clientid
;
423 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
425 /* OPEN on anything except a regular file is disallowed in NFSv4 */
426 switch (o_res
->f_attr
->mode
& S_IFMT
) {
440 nfs_increment_open_seqid(status
, o_arg
->seqid
);
443 update_changeattr(dir
, &o_res
->cinfo
);
444 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
445 status
= _nfs4_proc_open_confirm(server
->client
, &o_res
->fh
,
446 sp
, &o_res
->stateid
, o_arg
->seqid
);
450 nfs_confirm_seqid(&sp
->so_seqid
, 0);
451 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
452 status
= server
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
457 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
459 struct nfs_access_entry cache
;
463 if (openflags
& FMODE_READ
)
465 if (openflags
& FMODE_WRITE
)
467 status
= nfs_access_get_cached(inode
, cred
, &cache
);
471 /* Be clever: ask server to check for all possible rights */
472 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
474 cache
.jiffies
= jiffies
;
475 status
= _nfs4_proc_access(inode
, &cache
);
478 nfs_access_add_cache(inode
, &cache
);
480 if ((cache
.mask
& mask
) == mask
)
487 * reclaim state on the server after a network partition.
488 * Assumes caller holds the appropriate lock
490 static int _nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
492 struct dentry
*parent
= dget_parent(dentry
);
493 struct inode
*dir
= parent
->d_inode
;
494 struct inode
*inode
= state
->inode
;
495 struct nfs_server
*server
= NFS_SERVER(dir
);
496 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
497 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 nfs_fattr_init(&f_attr
);
524 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
527 /* Check if files differ */
528 if ((f_attr
.mode
& S_IFMT
) != (inode
->i_mode
& S_IFMT
))
530 /* Has the file handle changed? */
531 if (nfs_compare_fh(&o_res
.fh
, NFS_FH(inode
)) != 0) {
532 /* Verify if the change attributes are the same */
533 if (f_attr
.change_attr
!= NFS_I(inode
)->change_attr
)
535 if (nfs_size_to_loff_t(f_attr
.size
) != inode
->i_size
)
537 /* Lets just pretend that this is the same file */
538 nfs_copy_fh(NFS_FH(inode
), &o_res
.fh
);
539 NFS_I(inode
)->fileid
= f_attr
.fileid
;
541 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
542 if (o_res
.delegation_type
!= 0) {
543 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
))
544 nfs_inode_set_delegation(inode
, sp
->so_cred
, &o_res
);
546 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
549 nfs_free_seqid(o_arg
.seqid
);
550 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
556 /* Invalidate the state owner so we don't ever use it again */
557 nfs4_drop_state_owner(sp
);
559 /* Should we be trying to close that stateid? */
563 static inline int nfs4_do_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
565 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
566 struct nfs4_exception exception
= { };
570 err
= _nfs4_open_expired(sp
, state
, dentry
);
571 if (err
== -NFS4ERR_DELAY
)
572 nfs4_handle_exception(server
, err
, &exception
);
573 } while (exception
.retry
);
577 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
579 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
580 struct nfs_open_context
*ctx
;
583 spin_lock(&state
->inode
->i_lock
);
584 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
585 if (ctx
->state
!= state
)
587 get_nfs_open_context(ctx
);
588 spin_unlock(&state
->inode
->i_lock
);
589 status
= nfs4_do_open_expired(sp
, state
, ctx
->dentry
);
590 put_nfs_open_context(ctx
);
593 spin_unlock(&state
->inode
->i_lock
);
598 * Returns an nfs4_state + an extra reference to the inode
600 static int _nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
602 struct nfs_delegation
*delegation
;
603 struct nfs_server
*server
= NFS_SERVER(inode
);
604 struct nfs4_client
*clp
= server
->nfs4_state
;
605 struct nfs_inode
*nfsi
= NFS_I(inode
);
606 struct nfs4_state_owner
*sp
= NULL
;
607 struct nfs4_state
*state
= NULL
;
608 int open_flags
= flags
& (FMODE_READ
|FMODE_WRITE
);
611 /* Protect against reboot recovery - NOTE ORDER! */
612 down_read(&clp
->cl_sem
);
613 /* Protect against delegation recall */
614 down_read(&nfsi
->rwsem
);
615 delegation
= NFS_I(inode
)->delegation
;
617 if (delegation
== NULL
|| (delegation
->type
& open_flags
) != open_flags
)
620 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
621 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__
);
624 state
= nfs4_get_open_state(inode
, sp
);
629 if ((state
->state
& open_flags
) == open_flags
) {
630 spin_lock(&inode
->i_lock
);
631 if (open_flags
& FMODE_READ
)
633 if (open_flags
& FMODE_WRITE
)
635 spin_unlock(&inode
->i_lock
);
637 } else if (state
->state
!= 0)
641 err
= _nfs4_do_access(inode
, cred
, open_flags
);
645 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
646 update_open_stateid(state
, &delegation
->stateid
, open_flags
);
648 nfs4_put_state_owner(sp
);
649 up_read(&nfsi
->rwsem
);
650 up_read(&clp
->cl_sem
);
657 nfs4_put_open_state(state
);
658 nfs4_put_state_owner(sp
);
660 up_read(&nfsi
->rwsem
);
661 up_read(&clp
->cl_sem
);
663 nfs_inode_return_delegation(inode
);
667 static struct nfs4_state
*nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
)
669 struct nfs4_exception exception
= { };
670 struct nfs4_state
*res
;
674 err
= _nfs4_open_delegated(inode
, flags
, cred
, &res
);
677 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode
),
679 } while (exception
.retry
);
684 * Returns an nfs4_state + an referenced inode
686 static int _nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
688 struct nfs4_state_owner
*sp
;
689 struct nfs4_state
*state
= NULL
;
690 struct nfs_server
*server
= NFS_SERVER(dir
);
691 struct nfs4_client
*clp
= server
->nfs4_state
;
692 struct inode
*inode
= NULL
;
694 struct nfs_fattr f_attr
;
695 struct nfs_openargs o_arg
= {
698 .name
= &dentry
->d_name
,
700 .bitmask
= server
->attr_bitmask
,
701 .claim
= NFS4_OPEN_CLAIM_NULL
,
703 struct nfs_openres o_res
= {
708 /* Protect against reboot recovery conflicts */
709 down_read(&clp
->cl_sem
);
711 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
712 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
715 if (flags
& O_EXCL
) {
716 u32
*p
= (u32
*) o_arg
.u
.verifier
.data
;
720 o_arg
.u
.attrs
= sattr
;
721 /* Serialization for the sequence id */
723 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
724 if (o_arg
.seqid
== NULL
)
726 nfs_fattr_init(&f_attr
);
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
],
825 nfs_fattr_init(fattr
);
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 nfs4_lookup_root_arg args
= {
1109 .bitmask
= nfs4_fattr_bitmap
,
1111 struct nfs4_lookup_res res
= {
1113 .fattr
= info
->fattr
,
1116 struct rpc_message msg
= {
1117 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1121 nfs_fattr_init(info
->fattr
);
1122 return rpc_call_sync(server
->client
, &msg
, 0);
1125 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1126 struct nfs_fsinfo
*info
)
1128 struct nfs4_exception exception
= { };
1131 err
= nfs4_handle_exception(server
,
1132 _nfs4_lookup_root(server
, fhandle
, info
),
1134 } while (exception
.retry
);
1138 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1139 struct nfs_fsinfo
*info
)
1141 struct nfs_fattr
* fattr
= info
->fattr
;
1144 struct nfs4_lookup_arg args
= {
1147 .bitmask
= nfs4_fattr_bitmap
,
1149 struct nfs4_lookup_res res
= {
1154 struct rpc_message msg
= {
1155 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1162 * Now we do a separate LOOKUP for each component of the mount path.
1163 * The LOOKUPs are done separately so that we can conveniently
1164 * catch an ERR_WRONGSEC if it occurs along the way...
1166 status
= nfs4_lookup_root(server
, fhandle
, info
);
1170 p
= server
->mnt_path
;
1172 struct nfs4_exception exception
= { };
1179 while (*p
&& (*p
!= '/'))
1184 nfs_fattr_init(fattr
);
1185 status
= nfs4_handle_exception(server
,
1186 rpc_call_sync(server
->client
, &msg
, 0),
1188 } while (exception
.retry
);
1191 if (status
== -ENOENT
) {
1192 printk(KERN_NOTICE
"NFS: mount path %s does not exist!\n", server
->mnt_path
);
1193 printk(KERN_NOTICE
"NFS: suggestion: try mounting '/' instead.\n");
1198 status
= nfs4_server_capabilities(server
, fhandle
);
1200 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1205 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1207 struct nfs4_getattr_arg args
= {
1209 .bitmask
= server
->attr_bitmask
,
1211 struct nfs4_getattr_res res
= {
1215 struct rpc_message msg
= {
1216 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1221 nfs_fattr_init(fattr
);
1222 return rpc_call_sync(server
->client
, &msg
, 0);
1225 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1227 struct nfs4_exception exception
= { };
1230 err
= nfs4_handle_exception(server
,
1231 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1233 } while (exception
.retry
);
1238 * The file is not closed if it is opened due to the a request to change
1239 * the size of the file. The open call will not be needed once the
1240 * VFS layer lookup-intents are implemented.
1242 * Close is called when the inode is destroyed.
1243 * If we haven't opened the file for O_WRONLY, we
1244 * need to in the size_change case to obtain a stateid.
1247 * Because OPEN is always done by name in nfsv4, it is
1248 * possible that we opened a different file by the same
1249 * name. We can recognize this race condition, but we
1250 * can't do anything about it besides returning an error.
1252 * This will be fixed with VFS changes (lookup-intent).
1255 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1256 struct iattr
*sattr
)
1258 struct rpc_cred
*cred
;
1259 struct inode
*inode
= dentry
->d_inode
;
1260 struct nfs4_state
*state
;
1263 nfs_fattr_init(fattr
);
1265 cred
= rpcauth_lookupcred(NFS_SERVER(inode
)->client
->cl_auth
, 0);
1267 return PTR_ERR(cred
);
1268 /* Search for an existing WRITE delegation first */
1269 state
= nfs4_open_delegated(inode
, FMODE_WRITE
, cred
);
1270 if (!IS_ERR(state
)) {
1271 /* NB: nfs4_open_delegated() bumps the inode->i_count */
1274 /* Search for an existing open(O_WRITE) stateid */
1275 state
= nfs4_find_state(inode
, cred
, FMODE_WRITE
);
1278 status
= nfs4_do_setattr(NFS_SERVER(inode
), fattr
,
1279 NFS_FH(inode
), sattr
, state
);
1281 nfs_setattr_update_inode(inode
, sattr
);
1283 nfs4_close_state(state
, FMODE_WRITE
);
1288 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1289 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1292 struct nfs_server
*server
= NFS_SERVER(dir
);
1293 struct nfs4_lookup_arg args
= {
1294 .bitmask
= server
->attr_bitmask
,
1295 .dir_fh
= NFS_FH(dir
),
1298 struct nfs4_lookup_res res
= {
1303 struct rpc_message msg
= {
1304 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1309 nfs_fattr_init(fattr
);
1311 dprintk("NFS call lookup %s\n", name
->name
);
1312 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1313 dprintk("NFS reply lookup: %d\n", status
);
1317 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1319 struct nfs4_exception exception
= { };
1322 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1323 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1325 } while (exception
.retry
);
1329 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1331 struct nfs4_accessargs args
= {
1332 .fh
= NFS_FH(inode
),
1334 struct nfs4_accessres res
= { 0 };
1335 struct rpc_message msg
= {
1336 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1339 .rpc_cred
= entry
->cred
,
1341 int mode
= entry
->mask
;
1345 * Determine which access bits we want to ask for...
1347 if (mode
& MAY_READ
)
1348 args
.access
|= NFS4_ACCESS_READ
;
1349 if (S_ISDIR(inode
->i_mode
)) {
1350 if (mode
& MAY_WRITE
)
1351 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1352 if (mode
& MAY_EXEC
)
1353 args
.access
|= NFS4_ACCESS_LOOKUP
;
1355 if (mode
& MAY_WRITE
)
1356 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1357 if (mode
& MAY_EXEC
)
1358 args
.access
|= NFS4_ACCESS_EXECUTE
;
1360 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1363 if (res
.access
& NFS4_ACCESS_READ
)
1364 entry
->mask
|= MAY_READ
;
1365 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1366 entry
->mask
|= MAY_WRITE
;
1367 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1368 entry
->mask
|= MAY_EXEC
;
1373 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1375 struct nfs4_exception exception
= { };
1378 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1379 _nfs4_proc_access(inode
, entry
),
1381 } while (exception
.retry
);
1386 * TODO: For the time being, we don't try to get any attributes
1387 * along with any of the zero-copy operations READ, READDIR,
1390 * In the case of the first three, we want to put the GETATTR
1391 * after the read-type operation -- this is because it is hard
1392 * to predict the length of a GETATTR response in v4, and thus
1393 * align the READ data correctly. This means that the GETATTR
1394 * may end up partially falling into the page cache, and we should
1395 * shift it into the 'tail' of the xdr_buf before processing.
1396 * To do this efficiently, we need to know the total length
1397 * of data received, which doesn't seem to be available outside
1400 * In the case of WRITE, we also want to put the GETATTR after
1401 * the operation -- in this case because we want to make sure
1402 * we get the post-operation mtime and size. This means that
1403 * we can't use xdr_encode_pages() as written: we need a variant
1404 * of it which would leave room in the 'tail' iovec.
1406 * Both of these changes to the XDR layer would in fact be quite
1407 * minor, but I decided to leave them for a subsequent patch.
1409 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1410 unsigned int pgbase
, unsigned int pglen
)
1412 struct nfs4_readlink args
= {
1413 .fh
= NFS_FH(inode
),
1418 struct rpc_message msg
= {
1419 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1424 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1427 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1428 unsigned int pgbase
, unsigned int pglen
)
1430 struct nfs4_exception exception
= { };
1433 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1434 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1436 } while (exception
.retry
);
1440 static int _nfs4_proc_read(struct nfs_read_data
*rdata
)
1442 int flags
= rdata
->flags
;
1443 struct inode
*inode
= rdata
->inode
;
1444 struct nfs_fattr
*fattr
= rdata
->res
.fattr
;
1445 struct nfs_server
*server
= NFS_SERVER(inode
);
1446 struct rpc_message msg
= {
1447 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
1448 .rpc_argp
= &rdata
->args
,
1449 .rpc_resp
= &rdata
->res
,
1450 .rpc_cred
= rdata
->cred
,
1452 unsigned long timestamp
= jiffies
;
1455 dprintk("NFS call read %d @ %Ld\n", rdata
->args
.count
,
1456 (long long) rdata
->args
.offset
);
1458 nfs_fattr_init(fattr
);
1459 status
= rpc_call_sync(server
->client
, &msg
, flags
);
1461 renew_lease(server
, timestamp
);
1462 dprintk("NFS reply read: %d\n", status
);
1466 static int nfs4_proc_read(struct nfs_read_data
*rdata
)
1468 struct nfs4_exception exception
= { };
1471 err
= nfs4_handle_exception(NFS_SERVER(rdata
->inode
),
1472 _nfs4_proc_read(rdata
),
1474 } while (exception
.retry
);
1478 static int _nfs4_proc_write(struct nfs_write_data
*wdata
)
1480 int rpcflags
= wdata
->flags
;
1481 struct inode
*inode
= wdata
->inode
;
1482 struct nfs_fattr
*fattr
= wdata
->res
.fattr
;
1483 struct nfs_server
*server
= NFS_SERVER(inode
);
1484 struct rpc_message msg
= {
1485 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
1486 .rpc_argp
= &wdata
->args
,
1487 .rpc_resp
= &wdata
->res
,
1488 .rpc_cred
= wdata
->cred
,
1492 dprintk("NFS call write %d @ %Ld\n", wdata
->args
.count
,
1493 (long long) wdata
->args
.offset
);
1495 nfs_fattr_init(fattr
);
1496 status
= rpc_call_sync(server
->client
, &msg
, rpcflags
);
1497 dprintk("NFS reply write: %d\n", status
);
1501 static int nfs4_proc_write(struct nfs_write_data
*wdata
)
1503 struct nfs4_exception exception
= { };
1506 err
= nfs4_handle_exception(NFS_SERVER(wdata
->inode
),
1507 _nfs4_proc_write(wdata
),
1509 } while (exception
.retry
);
1513 static int _nfs4_proc_commit(struct nfs_write_data
*cdata
)
1515 struct inode
*inode
= cdata
->inode
;
1516 struct nfs_fattr
*fattr
= cdata
->res
.fattr
;
1517 struct nfs_server
*server
= NFS_SERVER(inode
);
1518 struct rpc_message msg
= {
1519 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
1520 .rpc_argp
= &cdata
->args
,
1521 .rpc_resp
= &cdata
->res
,
1522 .rpc_cred
= cdata
->cred
,
1526 dprintk("NFS call commit %d @ %Ld\n", cdata
->args
.count
,
1527 (long long) cdata
->args
.offset
);
1529 nfs_fattr_init(fattr
);
1530 status
= rpc_call_sync(server
->client
, &msg
, 0);
1531 dprintk("NFS reply commit: %d\n", status
);
1535 static int nfs4_proc_commit(struct nfs_write_data
*cdata
)
1537 struct nfs4_exception exception
= { };
1540 err
= nfs4_handle_exception(NFS_SERVER(cdata
->inode
),
1541 _nfs4_proc_commit(cdata
),
1543 } while (exception
.retry
);
1549 * We will need to arrange for the VFS layer to provide an atomic open.
1550 * Until then, this create/open method is prone to inefficiency and race
1551 * conditions due to the lookup, create, and open VFS calls from sys_open()
1552 * placed on the wire.
1554 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1555 * The file will be opened again in the subsequent VFS open call
1556 * (nfs4_proc_file_open).
1558 * The open for read will just hang around to be used by any process that
1559 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1563 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1564 int flags
, struct nameidata
*nd
)
1566 struct nfs4_state
*state
;
1567 struct rpc_cred
*cred
;
1570 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1572 status
= PTR_ERR(cred
);
1575 state
= nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
);
1577 if (IS_ERR(state
)) {
1578 status
= PTR_ERR(state
);
1581 d_instantiate(dentry
, state
->inode
);
1582 if (flags
& O_EXCL
) {
1583 struct nfs_fattr fattr
;
1584 status
= nfs4_do_setattr(NFS_SERVER(dir
), &fattr
,
1585 NFS_FH(state
->inode
), sattr
, state
);
1587 nfs_setattr_update_inode(state
->inode
, sattr
);
1589 if (status
== 0 && nd
!= NULL
&& (nd
->flags
& LOOKUP_OPEN
))
1590 nfs4_intent_set_file(nd
, dentry
, state
);
1592 nfs4_close_state(state
, flags
);
1597 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1599 struct nfs4_remove_arg args
= {
1603 struct nfs4_change_info res
;
1604 struct rpc_message msg
= {
1605 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1611 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1613 update_changeattr(dir
, &res
);
1617 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1619 struct nfs4_exception exception
= { };
1622 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1623 _nfs4_proc_remove(dir
, name
),
1625 } while (exception
.retry
);
1629 struct unlink_desc
{
1630 struct nfs4_remove_arg args
;
1631 struct nfs4_change_info res
;
1634 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1637 struct unlink_desc
*up
;
1639 up
= (struct unlink_desc
*) kmalloc(sizeof(*up
), GFP_KERNEL
);
1643 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1644 up
->args
.name
= name
;
1646 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1647 msg
->rpc_argp
= &up
->args
;
1648 msg
->rpc_resp
= &up
->res
;
1652 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1654 struct rpc_message
*msg
= &task
->tk_msg
;
1655 struct unlink_desc
*up
;
1657 if (msg
->rpc_resp
!= NULL
) {
1658 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1659 update_changeattr(dir
->d_inode
, &up
->res
);
1661 msg
->rpc_resp
= NULL
;
1662 msg
->rpc_argp
= NULL
;
1667 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1668 struct inode
*new_dir
, struct qstr
*new_name
)
1670 struct nfs4_rename_arg arg
= {
1671 .old_dir
= NFS_FH(old_dir
),
1672 .new_dir
= NFS_FH(new_dir
),
1673 .old_name
= old_name
,
1674 .new_name
= new_name
,
1676 struct nfs4_rename_res res
= { };
1677 struct rpc_message msg
= {
1678 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
1684 status
= rpc_call_sync(NFS_CLIENT(old_dir
), &msg
, 0);
1687 update_changeattr(old_dir
, &res
.old_cinfo
);
1688 update_changeattr(new_dir
, &res
.new_cinfo
);
1693 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1694 struct inode
*new_dir
, struct qstr
*new_name
)
1696 struct nfs4_exception exception
= { };
1699 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
1700 _nfs4_proc_rename(old_dir
, old_name
,
1703 } while (exception
.retry
);
1707 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1709 struct nfs4_link_arg arg
= {
1710 .fh
= NFS_FH(inode
),
1711 .dir_fh
= NFS_FH(dir
),
1714 struct nfs4_change_info cinfo
= { };
1715 struct rpc_message msg
= {
1716 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
1722 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1724 update_changeattr(dir
, &cinfo
);
1729 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1731 struct nfs4_exception exception
= { };
1734 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1735 _nfs4_proc_link(inode
, dir
, name
),
1737 } while (exception
.retry
);
1741 static int _nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1742 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1743 struct nfs_fattr
*fattr
)
1745 struct nfs_server
*server
= NFS_SERVER(dir
);
1746 struct nfs4_create_arg arg
= {
1747 .dir_fh
= NFS_FH(dir
),
1752 .bitmask
= server
->attr_bitmask
,
1754 struct nfs4_create_res res
= {
1759 struct rpc_message msg
= {
1760 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
1766 if (path
->len
> NFS4_MAXPATHLEN
)
1767 return -ENAMETOOLONG
;
1768 arg
.u
.symlink
= path
;
1769 nfs_fattr_init(fattr
);
1771 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1773 update_changeattr(dir
, &res
.dir_cinfo
);
1777 static int nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1778 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1779 struct nfs_fattr
*fattr
)
1781 struct nfs4_exception exception
= { };
1784 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1785 _nfs4_proc_symlink(dir
, name
, path
, sattr
,
1788 } while (exception
.retry
);
1792 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1793 struct iattr
*sattr
)
1795 struct nfs_server
*server
= NFS_SERVER(dir
);
1796 struct nfs_fh fhandle
;
1797 struct nfs_fattr fattr
;
1798 struct nfs4_create_arg arg
= {
1799 .dir_fh
= NFS_FH(dir
),
1801 .name
= &dentry
->d_name
,
1804 .bitmask
= server
->attr_bitmask
,
1806 struct nfs4_create_res res
= {
1811 struct rpc_message msg
= {
1812 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1818 nfs_fattr_init(&fattr
);
1820 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1822 update_changeattr(dir
, &res
.dir_cinfo
);
1823 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
1828 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1829 struct iattr
*sattr
)
1831 struct nfs4_exception exception
= { };
1834 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1835 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
1837 } while (exception
.retry
);
1841 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1842 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1844 struct inode
*dir
= dentry
->d_inode
;
1845 struct nfs4_readdir_arg args
= {
1850 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
1852 struct nfs4_readdir_res res
;
1853 struct rpc_message msg
= {
1854 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
1861 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
1862 dentry
->d_parent
->d_name
.name
,
1863 dentry
->d_name
.name
,
1864 (unsigned long long)cookie
);
1866 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
1867 res
.pgbase
= args
.pgbase
;
1868 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1870 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
1872 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
1876 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1877 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1879 struct nfs4_exception exception
= { };
1882 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
1883 _nfs4_proc_readdir(dentry
, cred
, cookie
,
1886 } while (exception
.retry
);
1890 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
1891 struct iattr
*sattr
, dev_t rdev
)
1893 struct nfs_server
*server
= NFS_SERVER(dir
);
1895 struct nfs_fattr fattr
;
1896 struct nfs4_create_arg arg
= {
1897 .dir_fh
= NFS_FH(dir
),
1899 .name
= &dentry
->d_name
,
1901 .bitmask
= server
->attr_bitmask
,
1903 struct nfs4_create_res res
= {
1908 struct rpc_message msg
= {
1909 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1914 int mode
= sattr
->ia_mode
;
1916 nfs_fattr_init(&fattr
);
1918 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
1919 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
1921 arg
.ftype
= NF4FIFO
;
1922 else if (S_ISBLK(mode
)) {
1924 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1925 arg
.u
.device
.specdata2
= MINOR(rdev
);
1927 else if (S_ISCHR(mode
)) {
1929 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1930 arg
.u
.device
.specdata2
= MINOR(rdev
);
1933 arg
.ftype
= NF4SOCK
;
1935 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1937 update_changeattr(dir
, &res
.dir_cinfo
);
1938 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
1943 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
1944 struct iattr
*sattr
, dev_t rdev
)
1946 struct nfs4_exception exception
= { };
1949 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1950 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
1952 } while (exception
.retry
);
1956 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1957 struct nfs_fsstat
*fsstat
)
1959 struct nfs4_statfs_arg args
= {
1961 .bitmask
= server
->attr_bitmask
,
1963 struct rpc_message msg
= {
1964 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
1969 nfs_fattr_init(fsstat
->fattr
);
1970 return rpc_call_sync(server
->client
, &msg
, 0);
1973 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
1975 struct nfs4_exception exception
= { };
1978 err
= nfs4_handle_exception(server
,
1979 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
1981 } while (exception
.retry
);
1985 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1986 struct nfs_fsinfo
*fsinfo
)
1988 struct nfs4_fsinfo_arg args
= {
1990 .bitmask
= server
->attr_bitmask
,
1992 struct rpc_message msg
= {
1993 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
1998 return rpc_call_sync(server
->client
, &msg
, 0);
2001 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2003 struct nfs4_exception exception
= { };
2007 err
= nfs4_handle_exception(server
,
2008 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2010 } while (exception
.retry
);
2014 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2016 nfs_fattr_init(fsinfo
->fattr
);
2017 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2020 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2021 struct nfs_pathconf
*pathconf
)
2023 struct nfs4_pathconf_arg args
= {
2025 .bitmask
= server
->attr_bitmask
,
2027 struct rpc_message msg
= {
2028 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2030 .rpc_resp
= pathconf
,
2033 /* None of the pathconf attributes are mandatory to implement */
2034 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2035 memset(pathconf
, 0, sizeof(*pathconf
));
2039 nfs_fattr_init(pathconf
->fattr
);
2040 return rpc_call_sync(server
->client
, &msg
, 0);
2043 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2044 struct nfs_pathconf
*pathconf
)
2046 struct nfs4_exception exception
= { };
2050 err
= nfs4_handle_exception(server
,
2051 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2053 } while (exception
.retry
);
2058 nfs4_read_done(struct rpc_task
*task
)
2060 struct nfs_read_data
*data
= (struct nfs_read_data
*) task
->tk_calldata
;
2061 struct inode
*inode
= data
->inode
;
2063 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2064 rpc_restart_call(task
);
2067 if (task
->tk_status
> 0)
2068 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2069 /* Call back common NFS readpage processing */
2070 nfs_readpage_result(task
);
2074 nfs4_proc_read_setup(struct nfs_read_data
*data
)
2076 struct rpc_task
*task
= &data
->task
;
2077 struct rpc_message msg
= {
2078 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2079 .rpc_argp
= &data
->args
,
2080 .rpc_resp
= &data
->res
,
2081 .rpc_cred
= data
->cred
,
2083 struct inode
*inode
= data
->inode
;
2086 data
->timestamp
= jiffies
;
2088 /* N.B. Do we need to test? Never called for swapfile inode */
2089 flags
= RPC_TASK_ASYNC
| (IS_SWAPFILE(inode
)? NFS_RPC_SWAPFLAGS
: 0);
2091 /* Finalize the task. */
2092 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_read_done
, flags
);
2093 rpc_call_setup(task
, &msg
, 0);
2097 nfs4_write_done(struct rpc_task
*task
)
2099 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2100 struct inode
*inode
= data
->inode
;
2102 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2103 rpc_restart_call(task
);
2106 if (task
->tk_status
>= 0)
2107 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2108 /* Call back common NFS writeback processing */
2109 nfs_writeback_done(task
);
2113 nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2115 struct rpc_task
*task
= &data
->task
;
2116 struct rpc_message msg
= {
2117 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2118 .rpc_argp
= &data
->args
,
2119 .rpc_resp
= &data
->res
,
2120 .rpc_cred
= data
->cred
,
2122 struct inode
*inode
= data
->inode
;
2126 if (how
& FLUSH_STABLE
) {
2127 if (!NFS_I(inode
)->ncommit
)
2128 stable
= NFS_FILE_SYNC
;
2130 stable
= NFS_DATA_SYNC
;
2132 stable
= NFS_UNSTABLE
;
2133 data
->args
.stable
= stable
;
2135 data
->timestamp
= jiffies
;
2137 /* Set the initial flags for the task. */
2138 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2140 /* Finalize the task. */
2141 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_write_done
, flags
);
2142 rpc_call_setup(task
, &msg
, 0);
2146 nfs4_commit_done(struct rpc_task
*task
)
2148 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2149 struct inode
*inode
= data
->inode
;
2151 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2152 rpc_restart_call(task
);
2155 /* Call back common NFS writeback processing */
2156 nfs_commit_done(task
);
2160 nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2162 struct rpc_task
*task
= &data
->task
;
2163 struct rpc_message msg
= {
2164 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2165 .rpc_argp
= &data
->args
,
2166 .rpc_resp
= &data
->res
,
2167 .rpc_cred
= data
->cred
,
2169 struct inode
*inode
= data
->inode
;
2172 /* Set the initial flags for the task. */
2173 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2175 /* Finalize the task. */
2176 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_commit_done
, flags
);
2177 rpc_call_setup(task
, &msg
, 0);
2181 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2182 * standalone procedure for queueing an asynchronous RENEW.
2185 renew_done(struct rpc_task
*task
)
2187 struct nfs4_client
*clp
= (struct nfs4_client
*)task
->tk_msg
.rpc_argp
;
2188 unsigned long timestamp
= (unsigned long)task
->tk_calldata
;
2190 if (task
->tk_status
< 0) {
2191 switch (task
->tk_status
) {
2192 case -NFS4ERR_STALE_CLIENTID
:
2193 case -NFS4ERR_EXPIRED
:
2194 case -NFS4ERR_CB_PATH_DOWN
:
2195 nfs4_schedule_state_recovery(clp
);
2199 spin_lock(&clp
->cl_lock
);
2200 if (time_before(clp
->cl_last_renewal
,timestamp
))
2201 clp
->cl_last_renewal
= timestamp
;
2202 spin_unlock(&clp
->cl_lock
);
2206 nfs4_proc_async_renew(struct nfs4_client
*clp
)
2208 struct rpc_message msg
= {
2209 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2211 .rpc_cred
= clp
->cl_cred
,
2214 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2215 renew_done
, (void *)jiffies
);
2219 nfs4_proc_renew(struct nfs4_client
*clp
)
2221 struct rpc_message msg
= {
2222 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2224 .rpc_cred
= clp
->cl_cred
,
2226 unsigned long now
= jiffies
;
2229 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2232 spin_lock(&clp
->cl_lock
);
2233 if (time_before(clp
->cl_last_renewal
,now
))
2234 clp
->cl_last_renewal
= now
;
2235 spin_unlock(&clp
->cl_lock
);
2239 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2241 return (server
->caps
& NFS_CAP_ACLS
)
2242 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2243 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2246 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2247 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2250 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2252 static void buf_to_pages(const void *buf
, size_t buflen
,
2253 struct page
**pages
, unsigned int *pgbase
)
2255 const void *p
= buf
;
2257 *pgbase
= offset_in_page(buf
);
2259 while (p
< buf
+ buflen
) {
2260 *(pages
++) = virt_to_page(p
);
2261 p
+= PAGE_CACHE_SIZE
;
2265 struct nfs4_cached_acl
{
2271 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2273 struct nfs_inode
*nfsi
= NFS_I(inode
);
2275 spin_lock(&inode
->i_lock
);
2276 kfree(nfsi
->nfs4_acl
);
2277 nfsi
->nfs4_acl
= acl
;
2278 spin_unlock(&inode
->i_lock
);
2281 static void nfs4_zap_acl_attr(struct inode
*inode
)
2283 nfs4_set_cached_acl(inode
, NULL
);
2286 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2288 struct nfs_inode
*nfsi
= NFS_I(inode
);
2289 struct nfs4_cached_acl
*acl
;
2292 spin_lock(&inode
->i_lock
);
2293 acl
= nfsi
->nfs4_acl
;
2296 if (buf
== NULL
) /* user is just asking for length */
2298 if (acl
->cached
== 0)
2300 ret
= -ERANGE
; /* see getxattr(2) man page */
2301 if (acl
->len
> buflen
)
2303 memcpy(buf
, acl
->data
, acl
->len
);
2307 spin_unlock(&inode
->i_lock
);
2311 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2313 struct nfs4_cached_acl
*acl
;
2315 if (buf
&& acl_len
<= PAGE_SIZE
) {
2316 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2320 memcpy(acl
->data
, buf
, acl_len
);
2322 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2329 nfs4_set_cached_acl(inode
, acl
);
2332 static inline ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2334 struct page
*pages
[NFS4ACL_MAXPAGES
];
2335 struct nfs_getaclargs args
= {
2336 .fh
= NFS_FH(inode
),
2340 size_t resp_len
= buflen
;
2342 struct rpc_message msg
= {
2343 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2345 .rpc_resp
= &resp_len
,
2347 struct page
*localpage
= NULL
;
2350 if (buflen
< PAGE_SIZE
) {
2351 /* As long as we're doing a round trip to the server anyway,
2352 * let's be prepared for a page of acl data. */
2353 localpage
= alloc_page(GFP_KERNEL
);
2354 resp_buf
= page_address(localpage
);
2355 if (localpage
== NULL
)
2357 args
.acl_pages
[0] = localpage
;
2358 args
.acl_pgbase
= 0;
2359 resp_len
= args
.acl_len
= PAGE_SIZE
;
2362 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2364 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2367 if (resp_len
> args
.acl_len
)
2368 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2370 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2373 if (resp_len
> buflen
)
2376 memcpy(buf
, resp_buf
, resp_len
);
2381 __free_page(localpage
);
2385 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2387 struct nfs_server
*server
= NFS_SERVER(inode
);
2390 if (!nfs4_server_supports_acls(server
))
2392 ret
= nfs_revalidate_inode(server
, inode
);
2395 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2398 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2401 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2403 struct nfs_server
*server
= NFS_SERVER(inode
);
2404 struct page
*pages
[NFS4ACL_MAXPAGES
];
2405 struct nfs_setaclargs arg
= {
2406 .fh
= NFS_FH(inode
),
2410 struct rpc_message msg
= {
2411 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2417 if (!nfs4_server_supports_acls(server
))
2419 nfs_inode_return_delegation(inode
);
2420 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2421 ret
= rpc_call_sync(NFS_SERVER(inode
)->client
, &msg
, 0);
2423 nfs4_write_cached_acl(inode
, buf
, buflen
);
2428 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2430 struct nfs4_client
*clp
= server
->nfs4_state
;
2432 if (!clp
|| task
->tk_status
>= 0)
2434 switch(task
->tk_status
) {
2435 case -NFS4ERR_STALE_CLIENTID
:
2436 case -NFS4ERR_STALE_STATEID
:
2437 case -NFS4ERR_EXPIRED
:
2438 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2439 nfs4_schedule_state_recovery(clp
);
2440 if (test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2441 rpc_wake_up_task(task
);
2442 task
->tk_status
= 0;
2444 case -NFS4ERR_GRACE
:
2445 case -NFS4ERR_DELAY
:
2446 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2447 task
->tk_status
= 0;
2449 case -NFS4ERR_OLD_STATEID
:
2450 task
->tk_status
= 0;
2453 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2457 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs4_client
*clp
)
2461 int interruptible
, res
= 0;
2465 rpc_clnt_sigmask(clnt
, &oldset
);
2466 interruptible
= TASK_UNINTERRUPTIBLE
;
2468 interruptible
= TASK_INTERRUPTIBLE
;
2469 prepare_to_wait(&clp
->cl_waitq
, &wait
, interruptible
);
2470 nfs4_schedule_state_recovery(clp
);
2471 if (clnt
->cl_intr
&& signalled())
2473 else if (!test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2475 finish_wait(&clp
->cl_waitq
, &wait
);
2476 rpc_clnt_sigunmask(clnt
, &oldset
);
2480 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2488 *timeout
= NFS4_POLL_RETRY_MIN
;
2489 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2490 *timeout
= NFS4_POLL_RETRY_MAX
;
2491 rpc_clnt_sigmask(clnt
, &oldset
);
2492 if (clnt
->cl_intr
) {
2493 schedule_timeout_interruptible(*timeout
);
2497 schedule_timeout_uninterruptible(*timeout
);
2498 rpc_clnt_sigunmask(clnt
, &oldset
);
2503 /* This is the error handling routine for processes that are allowed
2506 int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2508 struct nfs4_client
*clp
= server
->nfs4_state
;
2509 int ret
= errorcode
;
2511 exception
->retry
= 0;
2515 case -NFS4ERR_STALE_CLIENTID
:
2516 case -NFS4ERR_STALE_STATEID
:
2517 case -NFS4ERR_EXPIRED
:
2518 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2520 exception
->retry
= 1;
2522 case -NFS4ERR_GRACE
:
2523 case -NFS4ERR_DELAY
:
2524 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2526 exception
->retry
= 1;
2528 case -NFS4ERR_OLD_STATEID
:
2530 exception
->retry
= 1;
2532 /* We failed to handle the error */
2533 return nfs4_map_errors(ret
);
2536 int nfs4_proc_setclientid(struct nfs4_client
*clp
, u32 program
, unsigned short port
)
2538 nfs4_verifier sc_verifier
;
2539 struct nfs4_setclientid setclientid
= {
2540 .sc_verifier
= &sc_verifier
,
2543 struct rpc_message msg
= {
2544 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2545 .rpc_argp
= &setclientid
,
2547 .rpc_cred
= clp
->cl_cred
,
2553 p
= (u32
*)sc_verifier
.data
;
2554 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2555 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2558 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2559 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2560 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.s_addr
),
2561 clp
->cl_cred
->cr_ops
->cr_name
,
2562 clp
->cl_id_uniquifier
);
2563 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2564 sizeof(setclientid
.sc_netid
), "tcp");
2565 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2566 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2567 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2569 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2570 if (status
!= -NFS4ERR_CLID_INUSE
)
2575 ssleep(clp
->cl_lease_time
+ 1);
2577 if (++clp
->cl_id_uniquifier
== 0)
2584 nfs4_proc_setclientid_confirm(struct nfs4_client
*clp
)
2586 struct nfs_fsinfo fsinfo
;
2587 struct rpc_message msg
= {
2588 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2590 .rpc_resp
= &fsinfo
,
2591 .rpc_cred
= clp
->cl_cred
,
2597 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2599 spin_lock(&clp
->cl_lock
);
2600 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2601 clp
->cl_last_renewal
= now
;
2602 spin_unlock(&clp
->cl_lock
);
2607 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2609 struct nfs4_delegreturnargs args
= {
2610 .fhandle
= NFS_FH(inode
),
2613 struct rpc_message msg
= {
2614 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
2619 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2622 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2624 struct nfs_server
*server
= NFS_SERVER(inode
);
2625 struct nfs4_exception exception
= { };
2628 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
2630 case -NFS4ERR_STALE_STATEID
:
2631 case -NFS4ERR_EXPIRED
:
2632 nfs4_schedule_state_recovery(server
->nfs4_state
);
2636 err
= nfs4_handle_exception(server
, err
, &exception
);
2637 } while (exception
.retry
);
2641 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2642 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2645 * sleep, with exponential backoff, and retry the LOCK operation.
2647 static unsigned long
2648 nfs4_set_lock_task_retry(unsigned long timeout
)
2650 schedule_timeout_interruptible(timeout
);
2652 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
2653 return NFS4_LOCK_MAXTIMEOUT
;
2658 nfs4_lck_type(int cmd
, struct file_lock
*request
)
2661 switch (request
->fl_type
) {
2663 return IS_SETLKW(cmd
) ? NFS4_READW_LT
: NFS4_READ_LT
;
2665 return IS_SETLKW(cmd
) ? NFS4_WRITEW_LT
: NFS4_WRITE_LT
;
2667 return NFS4_WRITE_LT
;
2673 static inline uint64_t
2674 nfs4_lck_length(struct file_lock
*request
)
2676 if (request
->fl_end
== OFFSET_MAX
)
2677 return ~(uint64_t)0;
2678 return request
->fl_end
- request
->fl_start
+ 1;
2681 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2683 struct inode
*inode
= state
->inode
;
2684 struct nfs_server
*server
= NFS_SERVER(inode
);
2685 struct nfs4_client
*clp
= server
->nfs4_state
;
2686 struct nfs_lockargs arg
= {
2687 .fh
= NFS_FH(inode
),
2688 .type
= nfs4_lck_type(cmd
, request
),
2689 .offset
= request
->fl_start
,
2690 .length
= nfs4_lck_length(request
),
2692 struct nfs_lockres res
= {
2695 struct rpc_message msg
= {
2696 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
2699 .rpc_cred
= state
->owner
->so_cred
,
2701 struct nfs_lowner nlo
;
2702 struct nfs4_lock_state
*lsp
;
2705 down_read(&clp
->cl_sem
);
2706 nlo
.clientid
= clp
->cl_clientid
;
2707 status
= nfs4_set_lock_state(state
, request
);
2710 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2711 nlo
.id
= lsp
->ls_id
;
2713 status
= rpc_call_sync(server
->client
, &msg
, 0);
2715 request
->fl_type
= F_UNLCK
;
2716 } else if (status
== -NFS4ERR_DENIED
) {
2717 int64_t len
, start
, end
;
2718 start
= res
.u
.denied
.offset
;
2719 len
= res
.u
.denied
.length
;
2720 end
= start
+ len
- 1;
2721 if (end
< 0 || len
== 0)
2722 request
->fl_end
= OFFSET_MAX
;
2724 request
->fl_end
= (loff_t
)end
;
2725 request
->fl_start
= (loff_t
)start
;
2726 request
->fl_type
= F_WRLCK
;
2727 if (res
.u
.denied
.type
& 1)
2728 request
->fl_type
= F_RDLCK
;
2729 request
->fl_pid
= 0;
2733 up_read(&clp
->cl_sem
);
2737 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2739 struct nfs4_exception exception
= { };
2743 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
2744 _nfs4_proc_getlk(state
, cmd
, request
),
2746 } while (exception
.retry
);
2750 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
2753 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
2755 res
= posix_lock_file_wait(file
, fl
);
2758 res
= flock_lock_file_wait(file
, fl
);
2764 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n",
2769 struct nfs4_unlockdata
{
2770 struct nfs_lockargs arg
;
2771 struct nfs_locku_opargs luargs
;
2772 struct nfs_lockres res
;
2773 struct nfs4_lock_state
*lsp
;
2774 struct nfs_open_context
*ctx
;
2776 struct completion completion
;
2779 static void nfs4_locku_release_calldata(struct nfs4_unlockdata
*calldata
)
2781 if (atomic_dec_and_test(&calldata
->refcount
)) {
2782 nfs_free_seqid(calldata
->luargs
.seqid
);
2783 nfs4_put_lock_state(calldata
->lsp
);
2784 put_nfs_open_context(calldata
->ctx
);
2789 static void nfs4_locku_complete(struct nfs4_unlockdata
*calldata
)
2791 complete(&calldata
->completion
);
2792 nfs4_locku_release_calldata(calldata
);
2795 static void nfs4_locku_done(struct rpc_task
*task
)
2797 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2799 nfs_increment_lock_seqid(task
->tk_status
, calldata
->luargs
.seqid
);
2800 switch (task
->tk_status
) {
2802 memcpy(calldata
->lsp
->ls_stateid
.data
,
2803 calldata
->res
.u
.stateid
.data
,
2804 sizeof(calldata
->lsp
->ls_stateid
.data
));
2806 case -NFS4ERR_STALE_STATEID
:
2807 case -NFS4ERR_EXPIRED
:
2808 nfs4_schedule_state_recovery(calldata
->res
.server
->nfs4_state
);
2811 if (nfs4_async_handle_error(task
, calldata
->res
.server
) == -EAGAIN
) {
2812 rpc_restart_call(task
);
2816 nfs4_locku_complete(calldata
);
2819 static void nfs4_locku_begin(struct rpc_task
*task
)
2821 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2822 struct rpc_message msg
= {
2823 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
2824 .rpc_argp
= &calldata
->arg
,
2825 .rpc_resp
= &calldata
->res
,
2826 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
2830 status
= nfs_wait_on_sequence(calldata
->luargs
.seqid
, task
);
2833 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
2834 nfs4_locku_complete(calldata
);
2835 task
->tk_exit
= NULL
;
2839 rpc_call_setup(task
, &msg
, 0);
2842 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2844 struct nfs4_unlockdata
*calldata
;
2845 struct inode
*inode
= state
->inode
;
2846 struct nfs_server
*server
= NFS_SERVER(inode
);
2847 struct nfs4_lock_state
*lsp
;
2850 status
= nfs4_set_lock_state(state
, request
);
2853 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2854 /* We might have lost the locks! */
2855 if ((lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0)
2857 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
2858 if (calldata
== NULL
)
2860 calldata
->luargs
.seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
2861 if (calldata
->luargs
.seqid
== NULL
) {
2865 calldata
->luargs
.stateid
= &lsp
->ls_stateid
;
2866 calldata
->arg
.fh
= NFS_FH(inode
);
2867 calldata
->arg
.type
= nfs4_lck_type(cmd
, request
);
2868 calldata
->arg
.offset
= request
->fl_start
;
2869 calldata
->arg
.length
= nfs4_lck_length(request
);
2870 calldata
->arg
.u
.locku
= &calldata
->luargs
;
2871 calldata
->res
.server
= server
;
2872 calldata
->lsp
= lsp
;
2873 atomic_inc(&lsp
->ls_count
);
2875 /* Ensure we don't close file until we're done freeing locks! */
2876 calldata
->ctx
= get_nfs_open_context((struct nfs_open_context
*)request
->fl_file
->private_data
);
2878 atomic_set(&calldata
->refcount
, 2);
2879 init_completion(&calldata
->completion
);
2881 status
= nfs4_call_async(NFS_SERVER(inode
)->client
, nfs4_locku_begin
,
2882 nfs4_locku_done
, calldata
);
2884 wait_for_completion_interruptible(&calldata
->completion
);
2885 do_vfs_lock(request
->fl_file
, request
);
2886 nfs4_locku_release_calldata(calldata
);
2890 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
, int reclaim
)
2892 struct inode
*inode
= state
->inode
;
2893 struct nfs_server
*server
= NFS_SERVER(inode
);
2894 struct nfs4_lock_state
*lsp
= request
->fl_u
.nfs4_fl
.owner
;
2895 struct nfs_lock_opargs largs
= {
2896 .lock_stateid
= &lsp
->ls_stateid
,
2897 .open_stateid
= &state
->stateid
,
2899 .clientid
= server
->nfs4_state
->cl_clientid
,
2904 struct nfs_lockargs arg
= {
2905 .fh
= NFS_FH(inode
),
2906 .type
= nfs4_lck_type(cmd
, request
),
2907 .offset
= request
->fl_start
,
2908 .length
= nfs4_lck_length(request
),
2913 struct nfs_lockres res
= {
2916 struct rpc_message msg
= {
2917 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
2920 .rpc_cred
= state
->owner
->so_cred
,
2922 int status
= -ENOMEM
;
2924 largs
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
2925 if (largs
.lock_seqid
== NULL
)
2927 if (!(lsp
->ls_seqid
.flags
& NFS_SEQID_CONFIRMED
)) {
2928 struct nfs4_state_owner
*owner
= state
->owner
;
2930 largs
.open_seqid
= nfs_alloc_seqid(&owner
->so_seqid
);
2931 if (largs
.open_seqid
== NULL
)
2933 largs
.new_lock_owner
= 1;
2934 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
2935 /* increment open seqid on success, and seqid mutating errors */
2936 if (largs
.new_lock_owner
!= 0) {
2937 nfs_increment_open_seqid(status
, largs
.open_seqid
);
2939 nfs_confirm_seqid(&lsp
->ls_seqid
, 0);
2941 nfs_free_seqid(largs
.open_seqid
);
2943 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
2944 /* increment lock seqid on success, and seqid mutating errors*/
2945 nfs_increment_lock_seqid(status
, largs
.lock_seqid
);
2946 /* save the returned stateid. */
2948 memcpy(lsp
->ls_stateid
.data
, res
.u
.stateid
.data
,
2949 sizeof(lsp
->ls_stateid
.data
));
2950 lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
2951 } else if (status
== -NFS4ERR_DENIED
)
2954 nfs_free_seqid(largs
.lock_seqid
);
2958 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
2960 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
2961 struct nfs4_exception exception
= { };
2965 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
2966 if (err
!= -NFS4ERR_DELAY
)
2968 nfs4_handle_exception(server
, err
, &exception
);
2969 } while (exception
.retry
);
2973 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
2975 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
2976 struct nfs4_exception exception
= { };
2980 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
2981 if (err
!= -NFS4ERR_DELAY
)
2983 nfs4_handle_exception(server
, err
, &exception
);
2984 } while (exception
.retry
);
2988 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2990 struct nfs4_client
*clp
= state
->owner
->so_client
;
2993 down_read(&clp
->cl_sem
);
2994 status
= nfs4_set_lock_state(state
, request
);
2996 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
2998 /* Note: we always want to sleep here! */
2999 request
->fl_flags
|= FL_SLEEP
;
3000 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3001 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3003 up_read(&clp
->cl_sem
);
3007 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3009 struct nfs4_exception exception
= { };
3013 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3014 _nfs4_proc_setlk(state
, cmd
, request
),
3016 } while (exception
.retry
);
3021 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3023 struct nfs_open_context
*ctx
;
3024 struct nfs4_state
*state
;
3025 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3028 /* verify open state */
3029 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3032 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3036 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3038 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3041 if (request
->fl_type
== F_UNLCK
)
3042 return nfs4_proc_unlck(state
, cmd
, request
);
3045 status
= nfs4_proc_setlk(state
, cmd
, request
);
3046 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3048 timeout
= nfs4_set_lock_task_retry(timeout
);
3049 status
= -ERESTARTSYS
;
3052 } while(status
< 0);
3057 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3059 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3060 size_t buflen
, int flags
)
3062 struct inode
*inode
= dentry
->d_inode
;
3064 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3067 if (!S_ISREG(inode
->i_mode
) &&
3068 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3071 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3074 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3075 * and that's what we'll do for e.g. user attributes that haven't been set.
3076 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3077 * attributes in kernel-managed attribute namespaces. */
3078 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3081 struct inode
*inode
= dentry
->d_inode
;
3083 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3086 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3089 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3091 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3093 if (buf
&& buflen
< len
)
3096 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3100 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3101 .recover_open
= nfs4_open_reclaim
,
3102 .recover_lock
= nfs4_lock_reclaim
,
3105 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3106 .recover_open
= nfs4_open_expired
,
3107 .recover_lock
= nfs4_lock_expired
,
3110 static struct inode_operations nfs4_file_inode_operations
= {
3111 .permission
= nfs_permission
,
3112 .getattr
= nfs_getattr
,
3113 .setattr
= nfs_setattr
,
3114 .getxattr
= nfs4_getxattr
,
3115 .setxattr
= nfs4_setxattr
,
3116 .listxattr
= nfs4_listxattr
,
3119 struct nfs_rpc_ops nfs_v4_clientops
= {
3120 .version
= 4, /* protocol version */
3121 .dentry_ops
= &nfs4_dentry_operations
,
3122 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3123 .file_inode_ops
= &nfs4_file_inode_operations
,
3124 .getroot
= nfs4_proc_get_root
,
3125 .getattr
= nfs4_proc_getattr
,
3126 .setattr
= nfs4_proc_setattr
,
3127 .lookup
= nfs4_proc_lookup
,
3128 .access
= nfs4_proc_access
,
3129 .readlink
= nfs4_proc_readlink
,
3130 .read
= nfs4_proc_read
,
3131 .write
= nfs4_proc_write
,
3132 .commit
= nfs4_proc_commit
,
3133 .create
= nfs4_proc_create
,
3134 .remove
= nfs4_proc_remove
,
3135 .unlink_setup
= nfs4_proc_unlink_setup
,
3136 .unlink_done
= nfs4_proc_unlink_done
,
3137 .rename
= nfs4_proc_rename
,
3138 .link
= nfs4_proc_link
,
3139 .symlink
= nfs4_proc_symlink
,
3140 .mkdir
= nfs4_proc_mkdir
,
3141 .rmdir
= nfs4_proc_remove
,
3142 .readdir
= nfs4_proc_readdir
,
3143 .mknod
= nfs4_proc_mknod
,
3144 .statfs
= nfs4_proc_statfs
,
3145 .fsinfo
= nfs4_proc_fsinfo
,
3146 .pathconf
= nfs4_proc_pathconf
,
3147 .decode_dirent
= nfs4_decode_dirent
,
3148 .read_setup
= nfs4_proc_read_setup
,
3149 .write_setup
= nfs4_proc_write_setup
,
3150 .commit_setup
= nfs4_proc_commit_setup
,
3151 .file_open
= nfs_open
,
3152 .file_release
= nfs_release
,
3153 .lock
= nfs4_proc_lock
,
3154 .clear_acl_cache
= nfs4_zap_acl_attr
,