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 spin_lock(&inode
->i_lock
);
191 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
192 if (cinfo
->before
== nfsi
->change_attr
&& cinfo
->atomic
)
193 nfsi
->change_attr
= cinfo
->after
;
194 spin_unlock(&inode
->i_lock
);
197 /* Helper for asynchronous RPC calls */
198 static int nfs4_call_async(struct rpc_clnt
*clnt
, rpc_action tk_begin
,
199 rpc_action tk_exit
, void *calldata
)
201 struct rpc_task
*task
;
203 if (!(task
= rpc_new_task(clnt
, tk_exit
, RPC_TASK_ASYNC
)))
206 task
->tk_calldata
= calldata
;
207 task
->tk_action
= tk_begin
;
212 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
214 struct inode
*inode
= state
->inode
;
216 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
217 /* Protect against nfs4_find_state() */
218 spin_lock(&state
->owner
->so_lock
);
219 spin_lock(&inode
->i_lock
);
220 state
->state
|= open_flags
;
221 /* NB! List reordering - see the reclaim code for why. */
222 if ((open_flags
& FMODE_WRITE
) && 0 == state
->nwriters
++)
223 list_move(&state
->open_states
, &state
->owner
->so_states
);
224 if (open_flags
& FMODE_READ
)
226 memcpy(&state
->stateid
, stateid
, sizeof(state
->stateid
));
227 spin_unlock(&inode
->i_lock
);
228 spin_unlock(&state
->owner
->so_lock
);
233 * reclaim state on the server after a reboot.
235 static int _nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
237 struct inode
*inode
= state
->inode
;
238 struct nfs_server
*server
= NFS_SERVER(inode
);
239 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
240 struct nfs_openargs o_arg
= {
243 .open_flags
= state
->state
,
244 .clientid
= server
->nfs4_state
->cl_clientid
,
245 .claim
= NFS4_OPEN_CLAIM_PREVIOUS
,
246 .bitmask
= server
->attr_bitmask
,
248 struct nfs_openres o_res
= {
249 .server
= server
, /* Grrr */
251 struct rpc_message msg
= {
252 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
255 .rpc_cred
= sp
->so_cred
,
259 if (delegation
!= NULL
) {
260 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
261 memcpy(&state
->stateid
, &delegation
->stateid
,
262 sizeof(state
->stateid
));
263 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
266 o_arg
.u
.delegation_type
= delegation
->type
;
268 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
269 if (o_arg
.seqid
== NULL
)
271 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
272 /* Confirm the sequence as being established */
273 nfs_confirm_seqid(&sp
->so_seqid
, status
);
274 nfs_increment_open_seqid(status
, o_arg
.seqid
);
276 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
277 if (o_res
.delegation_type
!= 0) {
278 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
279 /* Did the server issue an immediate delegation recall? */
281 nfs_async_inode_return_delegation(inode
, &o_res
.stateid
);
284 nfs_free_seqid(o_arg
.seqid
);
285 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
286 /* Ensure we update the inode attributes */
291 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
293 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
294 struct nfs4_exception exception
= { };
297 err
= _nfs4_open_reclaim(sp
, state
);
298 if (err
!= -NFS4ERR_DELAY
)
300 nfs4_handle_exception(server
, err
, &exception
);
301 } while (exception
.retry
);
305 static int _nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
307 struct nfs4_state_owner
*sp
= state
->owner
;
308 struct inode
*inode
= dentry
->d_inode
;
309 struct nfs_server
*server
= NFS_SERVER(inode
);
310 struct dentry
*parent
= dget_parent(dentry
);
311 struct nfs_openargs arg
= {
312 .fh
= NFS_FH(parent
->d_inode
),
313 .clientid
= server
->nfs4_state
->cl_clientid
,
314 .name
= &dentry
->d_name
,
317 .bitmask
= server
->attr_bitmask
,
318 .claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
,
320 struct nfs_openres res
= {
323 struct rpc_message msg
= {
324 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
327 .rpc_cred
= sp
->so_cred
,
331 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
333 if (state
->state
== 0)
335 arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
337 if (arg
.seqid
== NULL
)
339 arg
.open_flags
= state
->state
;
340 memcpy(arg
.u
.delegation
.data
, state
->stateid
.data
, sizeof(arg
.u
.delegation
.data
));
341 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
342 nfs_increment_open_seqid(status
, arg
.seqid
);
345 if(res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
346 status
= _nfs4_proc_open_confirm(server
->client
, NFS_FH(inode
),
347 sp
, &res
.stateid
, arg
.seqid
);
351 nfs_confirm_seqid(&sp
->so_seqid
, 0);
353 memcpy(state
->stateid
.data
, res
.stateid
.data
,
354 sizeof(state
->stateid
.data
));
355 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
358 nfs_free_seqid(arg
.seqid
);
364 int nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
366 struct nfs4_exception exception
= { };
367 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
370 err
= _nfs4_open_delegation_recall(dentry
, state
);
374 case -NFS4ERR_STALE_CLIENTID
:
375 case -NFS4ERR_STALE_STATEID
:
376 case -NFS4ERR_EXPIRED
:
377 /* Don't recall a delegation if it was lost */
378 nfs4_schedule_state_recovery(server
->nfs4_state
);
381 err
= nfs4_handle_exception(server
, err
, &exception
);
382 } while (exception
.retry
);
386 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
)
388 struct nfs_open_confirmargs arg
= {
393 struct nfs_open_confirmres res
;
394 struct rpc_message msg
= {
395 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
398 .rpc_cred
= sp
->so_cred
,
402 status
= rpc_call_sync(clnt
, &msg
, RPC_TASK_NOINTR
);
403 /* Confirm the sequence as being established */
404 nfs_confirm_seqid(&sp
->so_seqid
, status
);
405 nfs_increment_open_seqid(status
, seqid
);
407 memcpy(stateid
, &res
.stateid
, sizeof(*stateid
));
411 static int _nfs4_proc_open(struct inode
*dir
, struct nfs4_state_owner
*sp
, struct nfs_openargs
*o_arg
, struct nfs_openres
*o_res
)
413 struct nfs_server
*server
= NFS_SERVER(dir
);
414 struct rpc_message msg
= {
415 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
418 .rpc_cred
= sp
->so_cred
,
422 /* Update sequence id. The caller must serialize! */
423 o_arg
->id
= sp
->so_id
;
424 o_arg
->clientid
= sp
->so_client
->cl_clientid
;
426 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
428 /* OPEN on anything except a regular file is disallowed in NFSv4 */
429 switch (o_res
->f_attr
->mode
& S_IFMT
) {
443 nfs_increment_open_seqid(status
, o_arg
->seqid
);
446 if (o_arg
->open_flags
& O_CREAT
) {
447 update_changeattr(dir
, &o_res
->cinfo
);
448 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
450 nfs_refresh_inode(dir
, o_res
->dir_attr
);
451 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
452 status
= _nfs4_proc_open_confirm(server
->client
, &o_res
->fh
,
453 sp
, &o_res
->stateid
, o_arg
->seqid
);
457 nfs_confirm_seqid(&sp
->so_seqid
, 0);
458 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
459 status
= server
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
464 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
466 struct nfs_access_entry cache
;
470 if (openflags
& FMODE_READ
)
472 if (openflags
& FMODE_WRITE
)
474 status
= nfs_access_get_cached(inode
, cred
, &cache
);
478 /* Be clever: ask server to check for all possible rights */
479 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
481 cache
.jiffies
= jiffies
;
482 status
= _nfs4_proc_access(inode
, &cache
);
485 nfs_access_add_cache(inode
, &cache
);
487 if ((cache
.mask
& mask
) == mask
)
494 * reclaim state on the server after a network partition.
495 * Assumes caller holds the appropriate lock
497 static int _nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
499 struct dentry
*parent
= dget_parent(dentry
);
500 struct inode
*dir
= parent
->d_inode
;
501 struct inode
*inode
= state
->inode
;
502 struct nfs_server
*server
= NFS_SERVER(dir
);
503 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
504 struct nfs_fattr f_attr
, dir_attr
;
505 struct nfs_openargs o_arg
= {
507 .open_flags
= state
->state
,
508 .name
= &dentry
->d_name
,
509 .bitmask
= server
->attr_bitmask
,
510 .claim
= NFS4_OPEN_CLAIM_NULL
,
512 struct nfs_openres o_res
= {
514 .dir_attr
= &dir_attr
,
519 if (delegation
!= NULL
&& !(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
520 status
= _nfs4_do_access(inode
, sp
->so_cred
, state
->state
);
523 memcpy(&state
->stateid
, &delegation
->stateid
, sizeof(state
->stateid
));
524 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
527 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
529 if (o_arg
.seqid
== NULL
)
531 nfs_fattr_init(&f_attr
);
532 nfs_fattr_init(&dir_attr
);
533 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
536 /* Check if files differ */
537 if ((f_attr
.mode
& S_IFMT
) != (inode
->i_mode
& S_IFMT
))
539 /* Has the file handle changed? */
540 if (nfs_compare_fh(&o_res
.fh
, NFS_FH(inode
)) != 0) {
541 /* Verify if the change attributes are the same */
542 if (f_attr
.change_attr
!= NFS_I(inode
)->change_attr
)
544 if (nfs_size_to_loff_t(f_attr
.size
) != inode
->i_size
)
546 /* Lets just pretend that this is the same file */
547 nfs_copy_fh(NFS_FH(inode
), &o_res
.fh
);
548 NFS_I(inode
)->fileid
= f_attr
.fileid
;
550 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
551 if (o_res
.delegation_type
!= 0) {
552 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
))
553 nfs_inode_set_delegation(inode
, sp
->so_cred
, &o_res
);
555 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
558 nfs_free_seqid(o_arg
.seqid
);
559 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
565 /* Invalidate the state owner so we don't ever use it again */
566 nfs4_drop_state_owner(sp
);
568 /* Should we be trying to close that stateid? */
572 static inline int nfs4_do_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
574 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
575 struct nfs4_exception exception
= { };
579 err
= _nfs4_open_expired(sp
, state
, dentry
);
580 if (err
== -NFS4ERR_DELAY
)
581 nfs4_handle_exception(server
, err
, &exception
);
582 } while (exception
.retry
);
586 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
588 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
589 struct nfs_open_context
*ctx
;
592 spin_lock(&state
->inode
->i_lock
);
593 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
594 if (ctx
->state
!= state
)
596 get_nfs_open_context(ctx
);
597 spin_unlock(&state
->inode
->i_lock
);
598 status
= nfs4_do_open_expired(sp
, state
, ctx
->dentry
);
599 put_nfs_open_context(ctx
);
602 spin_unlock(&state
->inode
->i_lock
);
607 * Returns an nfs4_state + an extra reference to the inode
609 static int _nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
611 struct nfs_delegation
*delegation
;
612 struct nfs_server
*server
= NFS_SERVER(inode
);
613 struct nfs4_client
*clp
= server
->nfs4_state
;
614 struct nfs_inode
*nfsi
= NFS_I(inode
);
615 struct nfs4_state_owner
*sp
= NULL
;
616 struct nfs4_state
*state
= NULL
;
617 int open_flags
= flags
& (FMODE_READ
|FMODE_WRITE
);
620 /* Protect against reboot recovery - NOTE ORDER! */
621 down_read(&clp
->cl_sem
);
622 /* Protect against delegation recall */
623 down_read(&nfsi
->rwsem
);
624 delegation
= NFS_I(inode
)->delegation
;
626 if (delegation
== NULL
|| (delegation
->type
& open_flags
) != open_flags
)
629 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
630 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__
);
633 state
= nfs4_get_open_state(inode
, sp
);
638 if ((state
->state
& open_flags
) == open_flags
) {
639 spin_lock(&inode
->i_lock
);
640 if (open_flags
& FMODE_READ
)
642 if (open_flags
& FMODE_WRITE
)
644 spin_unlock(&inode
->i_lock
);
646 } else if (state
->state
!= 0)
650 err
= _nfs4_do_access(inode
, cred
, open_flags
);
654 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
655 update_open_stateid(state
, &delegation
->stateid
, open_flags
);
657 nfs4_put_state_owner(sp
);
658 up_read(&nfsi
->rwsem
);
659 up_read(&clp
->cl_sem
);
666 nfs4_put_open_state(state
);
667 nfs4_put_state_owner(sp
);
669 up_read(&nfsi
->rwsem
);
670 up_read(&clp
->cl_sem
);
672 nfs_inode_return_delegation(inode
);
676 static struct nfs4_state
*nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
)
678 struct nfs4_exception exception
= { };
679 struct nfs4_state
*res
;
683 err
= _nfs4_open_delegated(inode
, flags
, cred
, &res
);
686 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode
),
688 } while (exception
.retry
);
693 * Returns an nfs4_state + an referenced inode
695 static int _nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
697 struct nfs4_state_owner
*sp
;
698 struct nfs4_state
*state
= NULL
;
699 struct nfs_server
*server
= NFS_SERVER(dir
);
700 struct nfs4_client
*clp
= server
->nfs4_state
;
701 struct inode
*inode
= NULL
;
703 struct nfs_fattr f_attr
, dir_attr
;
704 struct nfs_openargs o_arg
= {
707 .name
= &dentry
->d_name
,
709 .bitmask
= server
->attr_bitmask
,
710 .claim
= NFS4_OPEN_CLAIM_NULL
,
712 struct nfs_openres o_res
= {
714 .dir_attr
= &dir_attr
,
718 /* Protect against reboot recovery conflicts */
719 down_read(&clp
->cl_sem
);
721 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
722 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
725 if (flags
& O_EXCL
) {
726 u32
*p
= (u32
*) o_arg
.u
.verifier
.data
;
730 o_arg
.u
.attrs
= sattr
;
731 /* Serialization for the sequence id */
733 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
734 if (o_arg
.seqid
== NULL
)
736 nfs_fattr_init(&f_attr
);
737 nfs_fattr_init(&dir_attr
);
738 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
743 inode
= nfs_fhget(dir
->i_sb
, &o_res
.fh
, &f_attr
);
746 state
= nfs4_get_open_state(inode
, sp
);
749 update_open_stateid(state
, &o_res
.stateid
, flags
);
750 if (o_res
.delegation_type
!= 0)
751 nfs_inode_set_delegation(inode
, cred
, &o_res
);
752 nfs_free_seqid(o_arg
.seqid
);
753 nfs4_put_state_owner(sp
);
754 up_read(&clp
->cl_sem
);
760 nfs4_put_open_state(state
);
761 nfs_free_seqid(o_arg
.seqid
);
762 nfs4_put_state_owner(sp
);
764 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
765 up_read(&clp
->cl_sem
);
773 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
775 struct nfs4_exception exception
= { };
776 struct nfs4_state
*res
;
780 status
= _nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
, &res
);
783 /* NOTE: BAD_SEQID means the server and client disagree about the
784 * book-keeping w.r.t. state-changing operations
785 * (OPEN/CLOSE/LOCK/LOCKU...)
786 * It is actually a sign of a bug on the client or on the server.
788 * If we receive a BAD_SEQID error in the particular case of
789 * doing an OPEN, we assume that nfs_increment_open_seqid() will
790 * have unhashed the old state_owner for us, and that we can
791 * therefore safely retry using a new one. We should still warn
794 if (status
== -NFS4ERR_BAD_SEQID
) {
795 printk(KERN_WARNING
"NFS: v4 server returned a bad sequence-id error!\n");
800 * BAD_STATEID on OPEN means that the server cancelled our
801 * state before it received the OPEN_CONFIRM.
802 * Recover by retrying the request as per the discussion
803 * on Page 181 of RFC3530.
805 if (status
== -NFS4ERR_BAD_STATEID
) {
809 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
810 status
, &exception
));
811 } while (exception
.retry
);
815 static int _nfs4_do_setattr(struct nfs_server
*server
, struct nfs_fattr
*fattr
,
816 struct nfs_fh
*fhandle
, struct iattr
*sattr
,
817 struct nfs4_state
*state
)
819 struct nfs_setattrargs arg
= {
823 .bitmask
= server
->attr_bitmask
,
825 struct nfs_setattrres res
= {
829 struct rpc_message msg
= {
830 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
836 nfs_fattr_init(fattr
);
839 msg
.rpc_cred
= state
->owner
->so_cred
;
840 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
842 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
844 status
= rpc_call_sync(server
->client
, &msg
, 0);
848 static int nfs4_do_setattr(struct nfs_server
*server
, struct nfs_fattr
*fattr
,
849 struct nfs_fh
*fhandle
, struct iattr
*sattr
,
850 struct nfs4_state
*state
)
852 struct nfs4_exception exception
= { };
855 err
= nfs4_handle_exception(server
,
856 _nfs4_do_setattr(server
, fattr
, fhandle
, sattr
,
859 } while (exception
.retry
);
863 struct nfs4_closedata
{
865 struct nfs4_state
*state
;
866 struct nfs_closeargs arg
;
867 struct nfs_closeres res
;
868 struct nfs_fattr fattr
;
871 static void nfs4_free_closedata(struct nfs4_closedata
*calldata
)
873 struct nfs4_state
*state
= calldata
->state
;
874 struct nfs4_state_owner
*sp
= state
->owner
;
876 nfs4_put_open_state(calldata
->state
);
877 nfs_free_seqid(calldata
->arg
.seqid
);
878 nfs4_put_state_owner(sp
);
882 static void nfs4_close_done(struct rpc_task
*task
)
884 struct nfs4_closedata
*calldata
= (struct nfs4_closedata
*)task
->tk_calldata
;
885 struct nfs4_state
*state
= calldata
->state
;
886 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
888 /* hmm. we are done with the inode, and in the process of freeing
889 * the state_owner. we keep this around to process errors
891 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
892 switch (task
->tk_status
) {
894 memcpy(&state
->stateid
, &calldata
->res
.stateid
,
895 sizeof(state
->stateid
));
897 case -NFS4ERR_STALE_STATEID
:
898 case -NFS4ERR_EXPIRED
:
899 state
->state
= calldata
->arg
.open_flags
;
900 nfs4_schedule_state_recovery(server
->nfs4_state
);
903 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
904 rpc_restart_call(task
);
908 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
909 state
->state
= calldata
->arg
.open_flags
;
910 nfs4_free_closedata(calldata
);
913 static void nfs4_close_begin(struct rpc_task
*task
)
915 struct nfs4_closedata
*calldata
= (struct nfs4_closedata
*)task
->tk_calldata
;
916 struct nfs4_state
*state
= calldata
->state
;
917 struct rpc_message msg
= {
918 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
919 .rpc_argp
= &calldata
->arg
,
920 .rpc_resp
= &calldata
->res
,
921 .rpc_cred
= state
->owner
->so_cred
,
926 status
= nfs_wait_on_sequence(calldata
->arg
.seqid
, task
);
929 /* Don't reorder reads */
931 /* Recalculate the new open mode in case someone reopened the file
932 * while we were waiting in line to be scheduled.
934 if (state
->nreaders
!= 0)
936 if (state
->nwriters
!= 0)
938 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
940 if (mode
== state
->state
) {
941 nfs4_free_closedata(calldata
);
942 task
->tk_exit
= NULL
;
946 nfs_fattr_init(calldata
->res
.fattr
);
948 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
949 calldata
->arg
.open_flags
= mode
;
950 rpc_call_setup(task
, &msg
, 0);
954 * It is possible for data to be read/written from a mem-mapped file
955 * after the sys_close call (which hits the vfs layer as a flush).
956 * This means that we can't safely call nfsv4 close on a file until
957 * the inode is cleared. This in turn means that we are not good
958 * NFSv4 citizens - we do not indicate to the server to update the file's
959 * share state even when we are done with one of the three share
960 * stateid's in the inode.
962 * NOTE: Caller must be holding the sp->so_owner semaphore!
964 int nfs4_do_close(struct inode
*inode
, struct nfs4_state
*state
, mode_t mode
)
966 struct nfs_server
*server
= NFS_SERVER(inode
);
967 struct nfs4_closedata
*calldata
;
968 int status
= -ENOMEM
;
970 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
971 if (calldata
== NULL
)
973 calldata
->inode
= inode
;
974 calldata
->state
= state
;
975 calldata
->arg
.fh
= NFS_FH(inode
);
976 calldata
->arg
.stateid
= &state
->stateid
;
977 /* Serialization for the sequence id */
978 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
979 if (calldata
->arg
.seqid
== NULL
)
980 goto out_free_calldata
;
981 calldata
->arg
.bitmask
= server
->attr_bitmask
;
982 calldata
->res
.fattr
= &calldata
->fattr
;
983 calldata
->res
.server
= server
;
985 status
= nfs4_call_async(server
->client
, nfs4_close_begin
,
986 nfs4_close_done
, calldata
);
990 nfs_free_seqid(calldata
->arg
.seqid
);
997 static void nfs4_intent_set_file(struct nameidata
*nd
, struct dentry
*dentry
, struct nfs4_state
*state
)
1001 filp
= lookup_instantiate_filp(nd
, dentry
, NULL
);
1002 if (!IS_ERR(filp
)) {
1003 struct nfs_open_context
*ctx
;
1004 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1007 nfs4_close_state(state
, nd
->intent
.open
.flags
);
1011 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1014 struct rpc_cred
*cred
;
1015 struct nfs4_state
*state
;
1018 if (nd
->flags
& LOOKUP_CREATE
) {
1019 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1020 attr
.ia_valid
= ATTR_MODE
;
1021 if (!IS_POSIXACL(dir
))
1022 attr
.ia_mode
&= ~current
->fs
->umask
;
1025 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1028 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1030 return (struct dentry
*)cred
;
1031 state
= nfs4_do_open(dir
, dentry
, nd
->intent
.open
.flags
, &attr
, cred
);
1033 if (IS_ERR(state
)) {
1034 if (PTR_ERR(state
) == -ENOENT
)
1035 d_add(dentry
, NULL
);
1036 return (struct dentry
*)state
;
1038 res
= d_add_unique(dentry
, state
->inode
);
1041 nfs4_intent_set_file(nd
, dentry
, state
);
1046 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1048 struct rpc_cred
*cred
;
1049 struct nfs4_state
*state
;
1050 struct inode
*inode
;
1052 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1054 return PTR_ERR(cred
);
1055 state
= nfs4_open_delegated(dentry
->d_inode
, openflags
, cred
);
1057 state
= nfs4_do_open(dir
, dentry
, openflags
, NULL
, cred
);
1059 if (IS_ERR(state
)) {
1060 switch (PTR_ERR(state
)) {
1066 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1069 if (dentry
->d_inode
== NULL
)
1074 inode
= state
->inode
;
1076 if (inode
== dentry
->d_inode
) {
1077 nfs4_intent_set_file(nd
, dentry
, state
);
1080 nfs4_close_state(state
, openflags
);
1087 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1089 struct nfs4_server_caps_res res
= {};
1090 struct rpc_message msg
= {
1091 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1092 .rpc_argp
= fhandle
,
1097 status
= rpc_call_sync(server
->client
, &msg
, 0);
1099 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1100 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1101 server
->caps
|= NFS_CAP_ACLS
;
1102 if (res
.has_links
!= 0)
1103 server
->caps
|= NFS_CAP_HARDLINKS
;
1104 if (res
.has_symlinks
!= 0)
1105 server
->caps
|= NFS_CAP_SYMLINKS
;
1106 server
->acl_bitmask
= res
.acl_bitmask
;
1111 static int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1113 struct nfs4_exception exception
= { };
1116 err
= nfs4_handle_exception(server
,
1117 _nfs4_server_capabilities(server
, fhandle
),
1119 } while (exception
.retry
);
1123 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1124 struct nfs_fsinfo
*info
)
1126 struct nfs4_lookup_root_arg args
= {
1127 .bitmask
= nfs4_fattr_bitmap
,
1129 struct nfs4_lookup_res res
= {
1131 .fattr
= info
->fattr
,
1134 struct rpc_message msg
= {
1135 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1139 nfs_fattr_init(info
->fattr
);
1140 return rpc_call_sync(server
->client
, &msg
, 0);
1143 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1144 struct nfs_fsinfo
*info
)
1146 struct nfs4_exception exception
= { };
1149 err
= nfs4_handle_exception(server
,
1150 _nfs4_lookup_root(server
, fhandle
, info
),
1152 } while (exception
.retry
);
1156 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1157 struct nfs_fsinfo
*info
)
1159 struct nfs_fattr
* fattr
= info
->fattr
;
1162 struct nfs4_lookup_arg args
= {
1165 .bitmask
= nfs4_fattr_bitmap
,
1167 struct nfs4_lookup_res res
= {
1172 struct rpc_message msg
= {
1173 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1180 * Now we do a separate LOOKUP for each component of the mount path.
1181 * The LOOKUPs are done separately so that we can conveniently
1182 * catch an ERR_WRONGSEC if it occurs along the way...
1184 status
= nfs4_lookup_root(server
, fhandle
, info
);
1188 p
= server
->mnt_path
;
1190 struct nfs4_exception exception
= { };
1197 while (*p
&& (*p
!= '/'))
1202 nfs_fattr_init(fattr
);
1203 status
= nfs4_handle_exception(server
,
1204 rpc_call_sync(server
->client
, &msg
, 0),
1206 } while (exception
.retry
);
1209 if (status
== -ENOENT
) {
1210 printk(KERN_NOTICE
"NFS: mount path %s does not exist!\n", server
->mnt_path
);
1211 printk(KERN_NOTICE
"NFS: suggestion: try mounting '/' instead.\n");
1216 status
= nfs4_server_capabilities(server
, fhandle
);
1218 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1223 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1225 struct nfs4_getattr_arg args
= {
1227 .bitmask
= server
->attr_bitmask
,
1229 struct nfs4_getattr_res res
= {
1233 struct rpc_message msg
= {
1234 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1239 nfs_fattr_init(fattr
);
1240 return rpc_call_sync(server
->client
, &msg
, 0);
1243 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1245 struct nfs4_exception exception
= { };
1248 err
= nfs4_handle_exception(server
,
1249 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1251 } while (exception
.retry
);
1256 * The file is not closed if it is opened due to the a request to change
1257 * the size of the file. The open call will not be needed once the
1258 * VFS layer lookup-intents are implemented.
1260 * Close is called when the inode is destroyed.
1261 * If we haven't opened the file for O_WRONLY, we
1262 * need to in the size_change case to obtain a stateid.
1265 * Because OPEN is always done by name in nfsv4, it is
1266 * possible that we opened a different file by the same
1267 * name. We can recognize this race condition, but we
1268 * can't do anything about it besides returning an error.
1270 * This will be fixed with VFS changes (lookup-intent).
1273 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1274 struct iattr
*sattr
)
1276 struct rpc_cred
*cred
;
1277 struct inode
*inode
= dentry
->d_inode
;
1278 struct nfs4_state
*state
;
1281 nfs_fattr_init(fattr
);
1283 cred
= rpcauth_lookupcred(NFS_SERVER(inode
)->client
->cl_auth
, 0);
1285 return PTR_ERR(cred
);
1286 /* Search for an existing WRITE delegation first */
1287 state
= nfs4_open_delegated(inode
, FMODE_WRITE
, cred
);
1288 if (!IS_ERR(state
)) {
1289 /* NB: nfs4_open_delegated() bumps the inode->i_count */
1292 /* Search for an existing open(O_WRITE) stateid */
1293 state
= nfs4_find_state(inode
, cred
, FMODE_WRITE
);
1296 status
= nfs4_do_setattr(NFS_SERVER(inode
), fattr
,
1297 NFS_FH(inode
), sattr
, state
);
1299 nfs_setattr_update_inode(inode
, sattr
);
1301 nfs4_close_state(state
, FMODE_WRITE
);
1306 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1307 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1310 struct nfs_server
*server
= NFS_SERVER(dir
);
1311 struct nfs4_lookup_arg args
= {
1312 .bitmask
= server
->attr_bitmask
,
1313 .dir_fh
= NFS_FH(dir
),
1316 struct nfs4_lookup_res res
= {
1321 struct rpc_message msg
= {
1322 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1327 nfs_fattr_init(fattr
);
1329 dprintk("NFS call lookup %s\n", name
->name
);
1330 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1331 dprintk("NFS reply lookup: %d\n", status
);
1335 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1337 struct nfs4_exception exception
= { };
1340 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1341 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1343 } while (exception
.retry
);
1347 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1349 struct nfs4_accessargs args
= {
1350 .fh
= NFS_FH(inode
),
1352 struct nfs4_accessres res
= { 0 };
1353 struct rpc_message msg
= {
1354 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1357 .rpc_cred
= entry
->cred
,
1359 int mode
= entry
->mask
;
1363 * Determine which access bits we want to ask for...
1365 if (mode
& MAY_READ
)
1366 args
.access
|= NFS4_ACCESS_READ
;
1367 if (S_ISDIR(inode
->i_mode
)) {
1368 if (mode
& MAY_WRITE
)
1369 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1370 if (mode
& MAY_EXEC
)
1371 args
.access
|= NFS4_ACCESS_LOOKUP
;
1373 if (mode
& MAY_WRITE
)
1374 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1375 if (mode
& MAY_EXEC
)
1376 args
.access
|= NFS4_ACCESS_EXECUTE
;
1378 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1381 if (res
.access
& NFS4_ACCESS_READ
)
1382 entry
->mask
|= MAY_READ
;
1383 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1384 entry
->mask
|= MAY_WRITE
;
1385 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1386 entry
->mask
|= MAY_EXEC
;
1391 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1393 struct nfs4_exception exception
= { };
1396 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1397 _nfs4_proc_access(inode
, entry
),
1399 } while (exception
.retry
);
1404 * TODO: For the time being, we don't try to get any attributes
1405 * along with any of the zero-copy operations READ, READDIR,
1408 * In the case of the first three, we want to put the GETATTR
1409 * after the read-type operation -- this is because it is hard
1410 * to predict the length of a GETATTR response in v4, and thus
1411 * align the READ data correctly. This means that the GETATTR
1412 * may end up partially falling into the page cache, and we should
1413 * shift it into the 'tail' of the xdr_buf before processing.
1414 * To do this efficiently, we need to know the total length
1415 * of data received, which doesn't seem to be available outside
1418 * In the case of WRITE, we also want to put the GETATTR after
1419 * the operation -- in this case because we want to make sure
1420 * we get the post-operation mtime and size. This means that
1421 * we can't use xdr_encode_pages() as written: we need a variant
1422 * of it which would leave room in the 'tail' iovec.
1424 * Both of these changes to the XDR layer would in fact be quite
1425 * minor, but I decided to leave them for a subsequent patch.
1427 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1428 unsigned int pgbase
, unsigned int pglen
)
1430 struct nfs4_readlink args
= {
1431 .fh
= NFS_FH(inode
),
1436 struct rpc_message msg
= {
1437 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1442 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1445 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1446 unsigned int pgbase
, unsigned int pglen
)
1448 struct nfs4_exception exception
= { };
1451 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1452 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1454 } while (exception
.retry
);
1458 static int _nfs4_proc_read(struct nfs_read_data
*rdata
)
1460 int flags
= rdata
->flags
;
1461 struct inode
*inode
= rdata
->inode
;
1462 struct nfs_fattr
*fattr
= rdata
->res
.fattr
;
1463 struct nfs_server
*server
= NFS_SERVER(inode
);
1464 struct rpc_message msg
= {
1465 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
1466 .rpc_argp
= &rdata
->args
,
1467 .rpc_resp
= &rdata
->res
,
1468 .rpc_cred
= rdata
->cred
,
1470 unsigned long timestamp
= jiffies
;
1473 dprintk("NFS call read %d @ %Ld\n", rdata
->args
.count
,
1474 (long long) rdata
->args
.offset
);
1476 nfs_fattr_init(fattr
);
1477 status
= rpc_call_sync(server
->client
, &msg
, flags
);
1479 renew_lease(server
, timestamp
);
1480 dprintk("NFS reply read: %d\n", status
);
1484 static int nfs4_proc_read(struct nfs_read_data
*rdata
)
1486 struct nfs4_exception exception
= { };
1489 err
= nfs4_handle_exception(NFS_SERVER(rdata
->inode
),
1490 _nfs4_proc_read(rdata
),
1492 } while (exception
.retry
);
1496 static int _nfs4_proc_write(struct nfs_write_data
*wdata
)
1498 int rpcflags
= wdata
->flags
;
1499 struct inode
*inode
= wdata
->inode
;
1500 struct nfs_fattr
*fattr
= wdata
->res
.fattr
;
1501 struct nfs_server
*server
= NFS_SERVER(inode
);
1502 struct rpc_message msg
= {
1503 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
1504 .rpc_argp
= &wdata
->args
,
1505 .rpc_resp
= &wdata
->res
,
1506 .rpc_cred
= wdata
->cred
,
1510 dprintk("NFS call write %d @ %Ld\n", wdata
->args
.count
,
1511 (long long) wdata
->args
.offset
);
1513 nfs_fattr_init(fattr
);
1514 status
= rpc_call_sync(server
->client
, &msg
, rpcflags
);
1515 dprintk("NFS reply write: %d\n", status
);
1519 static int nfs4_proc_write(struct nfs_write_data
*wdata
)
1521 struct nfs4_exception exception
= { };
1524 err
= nfs4_handle_exception(NFS_SERVER(wdata
->inode
),
1525 _nfs4_proc_write(wdata
),
1527 } while (exception
.retry
);
1531 static int _nfs4_proc_commit(struct nfs_write_data
*cdata
)
1533 struct inode
*inode
= cdata
->inode
;
1534 struct nfs_fattr
*fattr
= cdata
->res
.fattr
;
1535 struct nfs_server
*server
= NFS_SERVER(inode
);
1536 struct rpc_message msg
= {
1537 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
1538 .rpc_argp
= &cdata
->args
,
1539 .rpc_resp
= &cdata
->res
,
1540 .rpc_cred
= cdata
->cred
,
1544 dprintk("NFS call commit %d @ %Ld\n", cdata
->args
.count
,
1545 (long long) cdata
->args
.offset
);
1547 nfs_fattr_init(fattr
);
1548 status
= rpc_call_sync(server
->client
, &msg
, 0);
1549 dprintk("NFS reply commit: %d\n", status
);
1553 static int nfs4_proc_commit(struct nfs_write_data
*cdata
)
1555 struct nfs4_exception exception
= { };
1558 err
= nfs4_handle_exception(NFS_SERVER(cdata
->inode
),
1559 _nfs4_proc_commit(cdata
),
1561 } while (exception
.retry
);
1567 * We will need to arrange for the VFS layer to provide an atomic open.
1568 * Until then, this create/open method is prone to inefficiency and race
1569 * conditions due to the lookup, create, and open VFS calls from sys_open()
1570 * placed on the wire.
1572 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1573 * The file will be opened again in the subsequent VFS open call
1574 * (nfs4_proc_file_open).
1576 * The open for read will just hang around to be used by any process that
1577 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1581 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1582 int flags
, struct nameidata
*nd
)
1584 struct nfs4_state
*state
;
1585 struct rpc_cred
*cred
;
1588 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1590 status
= PTR_ERR(cred
);
1593 state
= nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
);
1595 if (IS_ERR(state
)) {
1596 status
= PTR_ERR(state
);
1599 d_instantiate(dentry
, state
->inode
);
1600 if (flags
& O_EXCL
) {
1601 struct nfs_fattr fattr
;
1602 status
= nfs4_do_setattr(NFS_SERVER(dir
), &fattr
,
1603 NFS_FH(state
->inode
), sattr
, state
);
1605 nfs_setattr_update_inode(state
->inode
, sattr
);
1607 if (status
== 0 && nd
!= NULL
&& (nd
->flags
& LOOKUP_OPEN
))
1608 nfs4_intent_set_file(nd
, dentry
, state
);
1610 nfs4_close_state(state
, flags
);
1615 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1617 struct nfs_server
*server
= NFS_SERVER(dir
);
1618 struct nfs4_remove_arg args
= {
1621 .bitmask
= server
->attr_bitmask
,
1623 struct nfs_fattr dir_attr
;
1624 struct nfs4_remove_res res
= {
1626 .dir_attr
= &dir_attr
,
1628 struct rpc_message msg
= {
1629 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1635 nfs_fattr_init(res
.dir_attr
);
1636 status
= rpc_call_sync(server
->client
, &msg
, 0);
1638 update_changeattr(dir
, &res
.cinfo
);
1639 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1644 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1646 struct nfs4_exception exception
= { };
1649 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1650 _nfs4_proc_remove(dir
, name
),
1652 } while (exception
.retry
);
1656 struct unlink_desc
{
1657 struct nfs4_remove_arg args
;
1658 struct nfs4_remove_res res
;
1659 struct nfs_fattr dir_attr
;
1662 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1665 struct nfs_server
*server
= NFS_SERVER(dir
->d_inode
);
1666 struct unlink_desc
*up
;
1668 up
= (struct unlink_desc
*) kmalloc(sizeof(*up
), GFP_KERNEL
);
1672 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1673 up
->args
.name
= name
;
1674 up
->args
.bitmask
= server
->attr_bitmask
;
1675 up
->res
.server
= server
;
1676 up
->res
.dir_attr
= &up
->dir_attr
;
1678 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1679 msg
->rpc_argp
= &up
->args
;
1680 msg
->rpc_resp
= &up
->res
;
1684 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1686 struct rpc_message
*msg
= &task
->tk_msg
;
1687 struct unlink_desc
*up
;
1689 if (msg
->rpc_resp
!= NULL
) {
1690 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1691 update_changeattr(dir
->d_inode
, &up
->res
.cinfo
);
1692 nfs_post_op_update_inode(dir
->d_inode
, up
->res
.dir_attr
);
1694 msg
->rpc_resp
= NULL
;
1695 msg
->rpc_argp
= NULL
;
1700 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1701 struct inode
*new_dir
, struct qstr
*new_name
)
1703 struct nfs_server
*server
= NFS_SERVER(old_dir
);
1704 struct nfs4_rename_arg arg
= {
1705 .old_dir
= NFS_FH(old_dir
),
1706 .new_dir
= NFS_FH(new_dir
),
1707 .old_name
= old_name
,
1708 .new_name
= new_name
,
1709 .bitmask
= server
->attr_bitmask
,
1711 struct nfs_fattr old_fattr
, new_fattr
;
1712 struct nfs4_rename_res res
= {
1714 .old_fattr
= &old_fattr
,
1715 .new_fattr
= &new_fattr
,
1717 struct rpc_message msg
= {
1718 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
1724 nfs_fattr_init(res
.old_fattr
);
1725 nfs_fattr_init(res
.new_fattr
);
1726 status
= rpc_call_sync(server
->client
, &msg
, 0);
1729 update_changeattr(old_dir
, &res
.old_cinfo
);
1730 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
1731 update_changeattr(new_dir
, &res
.new_cinfo
);
1732 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
1737 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1738 struct inode
*new_dir
, struct qstr
*new_name
)
1740 struct nfs4_exception exception
= { };
1743 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
1744 _nfs4_proc_rename(old_dir
, old_name
,
1747 } while (exception
.retry
);
1751 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1753 struct nfs_server
*server
= NFS_SERVER(inode
);
1754 struct nfs4_link_arg arg
= {
1755 .fh
= NFS_FH(inode
),
1756 .dir_fh
= NFS_FH(dir
),
1758 .bitmask
= server
->attr_bitmask
,
1760 struct nfs_fattr fattr
, dir_attr
;
1761 struct nfs4_link_res res
= {
1764 .dir_attr
= &dir_attr
,
1766 struct rpc_message msg
= {
1767 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
1773 nfs_fattr_init(res
.fattr
);
1774 nfs_fattr_init(res
.dir_attr
);
1775 status
= rpc_call_sync(server
->client
, &msg
, 0);
1777 update_changeattr(dir
, &res
.cinfo
);
1778 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1779 nfs_refresh_inode(inode
, res
.fattr
);
1785 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1787 struct nfs4_exception exception
= { };
1790 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1791 _nfs4_proc_link(inode
, dir
, name
),
1793 } while (exception
.retry
);
1797 static int _nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1798 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1799 struct nfs_fattr
*fattr
)
1801 struct nfs_server
*server
= NFS_SERVER(dir
);
1802 struct nfs_fattr dir_fattr
;
1803 struct nfs4_create_arg arg
= {
1804 .dir_fh
= NFS_FH(dir
),
1809 .bitmask
= server
->attr_bitmask
,
1811 struct nfs4_create_res res
= {
1815 .dir_fattr
= &dir_fattr
,
1817 struct rpc_message msg
= {
1818 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
1824 if (path
->len
> NFS4_MAXPATHLEN
)
1825 return -ENAMETOOLONG
;
1826 arg
.u
.symlink
= path
;
1827 nfs_fattr_init(fattr
);
1828 nfs_fattr_init(&dir_fattr
);
1830 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1832 update_changeattr(dir
, &res
.dir_cinfo
);
1833 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
1837 static int nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1838 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1839 struct nfs_fattr
*fattr
)
1841 struct nfs4_exception exception
= { };
1844 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1845 _nfs4_proc_symlink(dir
, name
, path
, sattr
,
1848 } while (exception
.retry
);
1852 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1853 struct iattr
*sattr
)
1855 struct nfs_server
*server
= NFS_SERVER(dir
);
1856 struct nfs_fh fhandle
;
1857 struct nfs_fattr fattr
, dir_fattr
;
1858 struct nfs4_create_arg arg
= {
1859 .dir_fh
= NFS_FH(dir
),
1861 .name
= &dentry
->d_name
,
1864 .bitmask
= server
->attr_bitmask
,
1866 struct nfs4_create_res res
= {
1870 .dir_fattr
= &dir_fattr
,
1872 struct rpc_message msg
= {
1873 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1879 nfs_fattr_init(&fattr
);
1880 nfs_fattr_init(&dir_fattr
);
1882 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1884 update_changeattr(dir
, &res
.dir_cinfo
);
1885 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
1886 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
1891 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1892 struct iattr
*sattr
)
1894 struct nfs4_exception exception
= { };
1897 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1898 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
1900 } while (exception
.retry
);
1904 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1905 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1907 struct inode
*dir
= dentry
->d_inode
;
1908 struct nfs4_readdir_arg args
= {
1913 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
1915 struct nfs4_readdir_res res
;
1916 struct rpc_message msg
= {
1917 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
1924 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
1925 dentry
->d_parent
->d_name
.name
,
1926 dentry
->d_name
.name
,
1927 (unsigned long long)cookie
);
1929 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
1930 res
.pgbase
= args
.pgbase
;
1931 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1933 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
1935 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
1939 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1940 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1942 struct nfs4_exception exception
= { };
1945 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
1946 _nfs4_proc_readdir(dentry
, cred
, cookie
,
1949 } while (exception
.retry
);
1953 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
1954 struct iattr
*sattr
, dev_t rdev
)
1956 struct nfs_server
*server
= NFS_SERVER(dir
);
1958 struct nfs_fattr fattr
, dir_fattr
;
1959 struct nfs4_create_arg arg
= {
1960 .dir_fh
= NFS_FH(dir
),
1962 .name
= &dentry
->d_name
,
1964 .bitmask
= server
->attr_bitmask
,
1966 struct nfs4_create_res res
= {
1970 .dir_fattr
= &dir_fattr
,
1972 struct rpc_message msg
= {
1973 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1978 int mode
= sattr
->ia_mode
;
1980 nfs_fattr_init(&fattr
);
1981 nfs_fattr_init(&dir_fattr
);
1983 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
1984 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
1986 arg
.ftype
= NF4FIFO
;
1987 else if (S_ISBLK(mode
)) {
1989 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1990 arg
.u
.device
.specdata2
= MINOR(rdev
);
1992 else if (S_ISCHR(mode
)) {
1994 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1995 arg
.u
.device
.specdata2
= MINOR(rdev
);
1998 arg
.ftype
= NF4SOCK
;
2000 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2002 update_changeattr(dir
, &res
.dir_cinfo
);
2003 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2004 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2009 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2010 struct iattr
*sattr
, dev_t rdev
)
2012 struct nfs4_exception exception
= { };
2015 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2016 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2018 } while (exception
.retry
);
2022 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2023 struct nfs_fsstat
*fsstat
)
2025 struct nfs4_statfs_arg args
= {
2027 .bitmask
= server
->attr_bitmask
,
2029 struct rpc_message msg
= {
2030 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2035 nfs_fattr_init(fsstat
->fattr
);
2036 return rpc_call_sync(server
->client
, &msg
, 0);
2039 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2041 struct nfs4_exception exception
= { };
2044 err
= nfs4_handle_exception(server
,
2045 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2047 } while (exception
.retry
);
2051 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2052 struct nfs_fsinfo
*fsinfo
)
2054 struct nfs4_fsinfo_arg args
= {
2056 .bitmask
= server
->attr_bitmask
,
2058 struct rpc_message msg
= {
2059 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2064 return rpc_call_sync(server
->client
, &msg
, 0);
2067 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2069 struct nfs4_exception exception
= { };
2073 err
= nfs4_handle_exception(server
,
2074 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2076 } while (exception
.retry
);
2080 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2082 nfs_fattr_init(fsinfo
->fattr
);
2083 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2086 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2087 struct nfs_pathconf
*pathconf
)
2089 struct nfs4_pathconf_arg args
= {
2091 .bitmask
= server
->attr_bitmask
,
2093 struct rpc_message msg
= {
2094 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2096 .rpc_resp
= pathconf
,
2099 /* None of the pathconf attributes are mandatory to implement */
2100 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2101 memset(pathconf
, 0, sizeof(*pathconf
));
2105 nfs_fattr_init(pathconf
->fattr
);
2106 return rpc_call_sync(server
->client
, &msg
, 0);
2109 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2110 struct nfs_pathconf
*pathconf
)
2112 struct nfs4_exception exception
= { };
2116 err
= nfs4_handle_exception(server
,
2117 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2119 } while (exception
.retry
);
2124 nfs4_read_done(struct rpc_task
*task
)
2126 struct nfs_read_data
*data
= (struct nfs_read_data
*) task
->tk_calldata
;
2127 struct inode
*inode
= data
->inode
;
2129 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2130 rpc_restart_call(task
);
2133 if (task
->tk_status
> 0)
2134 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2135 /* Call back common NFS readpage processing */
2136 nfs_readpage_result(task
);
2140 nfs4_proc_read_setup(struct nfs_read_data
*data
)
2142 struct rpc_task
*task
= &data
->task
;
2143 struct rpc_message msg
= {
2144 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2145 .rpc_argp
= &data
->args
,
2146 .rpc_resp
= &data
->res
,
2147 .rpc_cred
= data
->cred
,
2149 struct inode
*inode
= data
->inode
;
2152 data
->timestamp
= jiffies
;
2154 /* N.B. Do we need to test? Never called for swapfile inode */
2155 flags
= RPC_TASK_ASYNC
| (IS_SWAPFILE(inode
)? NFS_RPC_SWAPFLAGS
: 0);
2157 /* Finalize the task. */
2158 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_read_done
, flags
);
2159 rpc_call_setup(task
, &msg
, 0);
2163 nfs4_write_done(struct rpc_task
*task
)
2165 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2166 struct inode
*inode
= data
->inode
;
2168 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2169 rpc_restart_call(task
);
2172 if (task
->tk_status
>= 0) {
2173 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2174 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2176 /* Call back common NFS writeback processing */
2177 nfs_writeback_done(task
);
2181 nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2183 struct rpc_task
*task
= &data
->task
;
2184 struct rpc_message msg
= {
2185 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2186 .rpc_argp
= &data
->args
,
2187 .rpc_resp
= &data
->res
,
2188 .rpc_cred
= data
->cred
,
2190 struct inode
*inode
= data
->inode
;
2191 struct nfs_server
*server
= NFS_SERVER(inode
);
2195 if (how
& FLUSH_STABLE
) {
2196 if (!NFS_I(inode
)->ncommit
)
2197 stable
= NFS_FILE_SYNC
;
2199 stable
= NFS_DATA_SYNC
;
2201 stable
= NFS_UNSTABLE
;
2202 data
->args
.stable
= stable
;
2203 data
->args
.bitmask
= server
->attr_bitmask
;
2204 data
->res
.server
= server
;
2206 data
->timestamp
= jiffies
;
2208 /* Set the initial flags for the task. */
2209 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2211 /* Finalize the task. */
2212 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_write_done
, flags
);
2213 rpc_call_setup(task
, &msg
, 0);
2217 nfs4_commit_done(struct rpc_task
*task
)
2219 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2220 struct inode
*inode
= data
->inode
;
2222 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2223 rpc_restart_call(task
);
2226 if (task
->tk_status
>= 0)
2227 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2228 /* Call back common NFS writeback processing */
2229 nfs_commit_done(task
);
2233 nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2235 struct rpc_task
*task
= &data
->task
;
2236 struct rpc_message msg
= {
2237 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2238 .rpc_argp
= &data
->args
,
2239 .rpc_resp
= &data
->res
,
2240 .rpc_cred
= data
->cred
,
2242 struct inode
*inode
= data
->inode
;
2243 struct nfs_server
*server
= NFS_SERVER(inode
);
2246 data
->args
.bitmask
= server
->attr_bitmask
;
2247 data
->res
.server
= server
;
2249 /* Set the initial flags for the task. */
2250 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2252 /* Finalize the task. */
2253 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_commit_done
, flags
);
2254 rpc_call_setup(task
, &msg
, 0);
2258 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2259 * standalone procedure for queueing an asynchronous RENEW.
2262 renew_done(struct rpc_task
*task
)
2264 struct nfs4_client
*clp
= (struct nfs4_client
*)task
->tk_msg
.rpc_argp
;
2265 unsigned long timestamp
= (unsigned long)task
->tk_calldata
;
2267 if (task
->tk_status
< 0) {
2268 switch (task
->tk_status
) {
2269 case -NFS4ERR_STALE_CLIENTID
:
2270 case -NFS4ERR_EXPIRED
:
2271 case -NFS4ERR_CB_PATH_DOWN
:
2272 nfs4_schedule_state_recovery(clp
);
2276 spin_lock(&clp
->cl_lock
);
2277 if (time_before(clp
->cl_last_renewal
,timestamp
))
2278 clp
->cl_last_renewal
= timestamp
;
2279 spin_unlock(&clp
->cl_lock
);
2283 nfs4_proc_async_renew(struct nfs4_client
*clp
)
2285 struct rpc_message msg
= {
2286 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2288 .rpc_cred
= clp
->cl_cred
,
2291 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2292 renew_done
, (void *)jiffies
);
2296 nfs4_proc_renew(struct nfs4_client
*clp
)
2298 struct rpc_message msg
= {
2299 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2301 .rpc_cred
= clp
->cl_cred
,
2303 unsigned long now
= jiffies
;
2306 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2309 spin_lock(&clp
->cl_lock
);
2310 if (time_before(clp
->cl_last_renewal
,now
))
2311 clp
->cl_last_renewal
= now
;
2312 spin_unlock(&clp
->cl_lock
);
2316 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2318 return (server
->caps
& NFS_CAP_ACLS
)
2319 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2320 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2323 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2324 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2327 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2329 static void buf_to_pages(const void *buf
, size_t buflen
,
2330 struct page
**pages
, unsigned int *pgbase
)
2332 const void *p
= buf
;
2334 *pgbase
= offset_in_page(buf
);
2336 while (p
< buf
+ buflen
) {
2337 *(pages
++) = virt_to_page(p
);
2338 p
+= PAGE_CACHE_SIZE
;
2342 struct nfs4_cached_acl
{
2348 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2350 struct nfs_inode
*nfsi
= NFS_I(inode
);
2352 spin_lock(&inode
->i_lock
);
2353 kfree(nfsi
->nfs4_acl
);
2354 nfsi
->nfs4_acl
= acl
;
2355 spin_unlock(&inode
->i_lock
);
2358 static void nfs4_zap_acl_attr(struct inode
*inode
)
2360 nfs4_set_cached_acl(inode
, NULL
);
2363 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2365 struct nfs_inode
*nfsi
= NFS_I(inode
);
2366 struct nfs4_cached_acl
*acl
;
2369 spin_lock(&inode
->i_lock
);
2370 acl
= nfsi
->nfs4_acl
;
2373 if (buf
== NULL
) /* user is just asking for length */
2375 if (acl
->cached
== 0)
2377 ret
= -ERANGE
; /* see getxattr(2) man page */
2378 if (acl
->len
> buflen
)
2380 memcpy(buf
, acl
->data
, acl
->len
);
2384 spin_unlock(&inode
->i_lock
);
2388 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2390 struct nfs4_cached_acl
*acl
;
2392 if (buf
&& acl_len
<= PAGE_SIZE
) {
2393 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2397 memcpy(acl
->data
, buf
, acl_len
);
2399 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2406 nfs4_set_cached_acl(inode
, acl
);
2409 static inline ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2411 struct page
*pages
[NFS4ACL_MAXPAGES
];
2412 struct nfs_getaclargs args
= {
2413 .fh
= NFS_FH(inode
),
2417 size_t resp_len
= buflen
;
2419 struct rpc_message msg
= {
2420 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2422 .rpc_resp
= &resp_len
,
2424 struct page
*localpage
= NULL
;
2427 if (buflen
< PAGE_SIZE
) {
2428 /* As long as we're doing a round trip to the server anyway,
2429 * let's be prepared for a page of acl data. */
2430 localpage
= alloc_page(GFP_KERNEL
);
2431 resp_buf
= page_address(localpage
);
2432 if (localpage
== NULL
)
2434 args
.acl_pages
[0] = localpage
;
2435 args
.acl_pgbase
= 0;
2436 resp_len
= args
.acl_len
= PAGE_SIZE
;
2439 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2441 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2444 if (resp_len
> args
.acl_len
)
2445 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2447 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2450 if (resp_len
> buflen
)
2453 memcpy(buf
, resp_buf
, resp_len
);
2458 __free_page(localpage
);
2462 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2464 struct nfs_server
*server
= NFS_SERVER(inode
);
2467 if (!nfs4_server_supports_acls(server
))
2469 ret
= nfs_revalidate_inode(server
, inode
);
2472 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2475 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2478 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2480 struct nfs_server
*server
= NFS_SERVER(inode
);
2481 struct page
*pages
[NFS4ACL_MAXPAGES
];
2482 struct nfs_setaclargs arg
= {
2483 .fh
= NFS_FH(inode
),
2487 struct rpc_message msg
= {
2488 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2494 if (!nfs4_server_supports_acls(server
))
2496 nfs_inode_return_delegation(inode
);
2497 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2498 ret
= rpc_call_sync(NFS_SERVER(inode
)->client
, &msg
, 0);
2500 nfs4_write_cached_acl(inode
, buf
, buflen
);
2505 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2507 struct nfs4_client
*clp
= server
->nfs4_state
;
2509 if (!clp
|| task
->tk_status
>= 0)
2511 switch(task
->tk_status
) {
2512 case -NFS4ERR_STALE_CLIENTID
:
2513 case -NFS4ERR_STALE_STATEID
:
2514 case -NFS4ERR_EXPIRED
:
2515 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2516 nfs4_schedule_state_recovery(clp
);
2517 if (test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2518 rpc_wake_up_task(task
);
2519 task
->tk_status
= 0;
2521 case -NFS4ERR_GRACE
:
2522 case -NFS4ERR_DELAY
:
2523 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2524 task
->tk_status
= 0;
2526 case -NFS4ERR_OLD_STATEID
:
2527 task
->tk_status
= 0;
2530 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2534 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs4_client
*clp
)
2538 int interruptible
, res
= 0;
2542 rpc_clnt_sigmask(clnt
, &oldset
);
2543 interruptible
= TASK_UNINTERRUPTIBLE
;
2545 interruptible
= TASK_INTERRUPTIBLE
;
2546 prepare_to_wait(&clp
->cl_waitq
, &wait
, interruptible
);
2547 nfs4_schedule_state_recovery(clp
);
2548 if (clnt
->cl_intr
&& signalled())
2550 else if (!test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2552 finish_wait(&clp
->cl_waitq
, &wait
);
2553 rpc_clnt_sigunmask(clnt
, &oldset
);
2557 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2565 *timeout
= NFS4_POLL_RETRY_MIN
;
2566 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2567 *timeout
= NFS4_POLL_RETRY_MAX
;
2568 rpc_clnt_sigmask(clnt
, &oldset
);
2569 if (clnt
->cl_intr
) {
2570 schedule_timeout_interruptible(*timeout
);
2574 schedule_timeout_uninterruptible(*timeout
);
2575 rpc_clnt_sigunmask(clnt
, &oldset
);
2580 /* This is the error handling routine for processes that are allowed
2583 int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2585 struct nfs4_client
*clp
= server
->nfs4_state
;
2586 int ret
= errorcode
;
2588 exception
->retry
= 0;
2592 case -NFS4ERR_STALE_CLIENTID
:
2593 case -NFS4ERR_STALE_STATEID
:
2594 case -NFS4ERR_EXPIRED
:
2595 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2597 exception
->retry
= 1;
2599 case -NFS4ERR_GRACE
:
2600 case -NFS4ERR_DELAY
:
2601 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2603 exception
->retry
= 1;
2605 case -NFS4ERR_OLD_STATEID
:
2607 exception
->retry
= 1;
2609 /* We failed to handle the error */
2610 return nfs4_map_errors(ret
);
2613 int nfs4_proc_setclientid(struct nfs4_client
*clp
, u32 program
, unsigned short port
)
2615 nfs4_verifier sc_verifier
;
2616 struct nfs4_setclientid setclientid
= {
2617 .sc_verifier
= &sc_verifier
,
2620 struct rpc_message msg
= {
2621 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2622 .rpc_argp
= &setclientid
,
2624 .rpc_cred
= clp
->cl_cred
,
2630 p
= (u32
*)sc_verifier
.data
;
2631 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2632 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2635 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2636 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2637 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.s_addr
),
2638 clp
->cl_cred
->cr_ops
->cr_name
,
2639 clp
->cl_id_uniquifier
);
2640 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2641 sizeof(setclientid
.sc_netid
), "tcp");
2642 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2643 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2644 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2646 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2647 if (status
!= -NFS4ERR_CLID_INUSE
)
2652 ssleep(clp
->cl_lease_time
+ 1);
2654 if (++clp
->cl_id_uniquifier
== 0)
2661 nfs4_proc_setclientid_confirm(struct nfs4_client
*clp
)
2663 struct nfs_fsinfo fsinfo
;
2664 struct rpc_message msg
= {
2665 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2667 .rpc_resp
= &fsinfo
,
2668 .rpc_cred
= clp
->cl_cred
,
2674 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2676 spin_lock(&clp
->cl_lock
);
2677 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2678 clp
->cl_last_renewal
= now
;
2679 spin_unlock(&clp
->cl_lock
);
2684 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2686 struct nfs4_delegreturnargs args
= {
2687 .fhandle
= NFS_FH(inode
),
2690 struct rpc_message msg
= {
2691 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
2696 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2699 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2701 struct nfs_server
*server
= NFS_SERVER(inode
);
2702 struct nfs4_exception exception
= { };
2705 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
2707 case -NFS4ERR_STALE_STATEID
:
2708 case -NFS4ERR_EXPIRED
:
2709 nfs4_schedule_state_recovery(server
->nfs4_state
);
2713 err
= nfs4_handle_exception(server
, err
, &exception
);
2714 } while (exception
.retry
);
2718 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2719 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2722 * sleep, with exponential backoff, and retry the LOCK operation.
2724 static unsigned long
2725 nfs4_set_lock_task_retry(unsigned long timeout
)
2727 schedule_timeout_interruptible(timeout
);
2729 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
2730 return NFS4_LOCK_MAXTIMEOUT
;
2735 nfs4_lck_type(int cmd
, struct file_lock
*request
)
2738 switch (request
->fl_type
) {
2740 return IS_SETLKW(cmd
) ? NFS4_READW_LT
: NFS4_READ_LT
;
2742 return IS_SETLKW(cmd
) ? NFS4_WRITEW_LT
: NFS4_WRITE_LT
;
2744 return NFS4_WRITE_LT
;
2750 static inline uint64_t
2751 nfs4_lck_length(struct file_lock
*request
)
2753 if (request
->fl_end
== OFFSET_MAX
)
2754 return ~(uint64_t)0;
2755 return request
->fl_end
- request
->fl_start
+ 1;
2758 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2760 struct inode
*inode
= state
->inode
;
2761 struct nfs_server
*server
= NFS_SERVER(inode
);
2762 struct nfs4_client
*clp
= server
->nfs4_state
;
2763 struct nfs_lockargs arg
= {
2764 .fh
= NFS_FH(inode
),
2765 .type
= nfs4_lck_type(cmd
, request
),
2766 .offset
= request
->fl_start
,
2767 .length
= nfs4_lck_length(request
),
2769 struct nfs_lockres res
= {
2772 struct rpc_message msg
= {
2773 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
2776 .rpc_cred
= state
->owner
->so_cred
,
2778 struct nfs_lowner nlo
;
2779 struct nfs4_lock_state
*lsp
;
2782 down_read(&clp
->cl_sem
);
2783 nlo
.clientid
= clp
->cl_clientid
;
2784 status
= nfs4_set_lock_state(state
, request
);
2787 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2788 nlo
.id
= lsp
->ls_id
;
2790 status
= rpc_call_sync(server
->client
, &msg
, 0);
2792 request
->fl_type
= F_UNLCK
;
2793 } else if (status
== -NFS4ERR_DENIED
) {
2794 int64_t len
, start
, end
;
2795 start
= res
.u
.denied
.offset
;
2796 len
= res
.u
.denied
.length
;
2797 end
= start
+ len
- 1;
2798 if (end
< 0 || len
== 0)
2799 request
->fl_end
= OFFSET_MAX
;
2801 request
->fl_end
= (loff_t
)end
;
2802 request
->fl_start
= (loff_t
)start
;
2803 request
->fl_type
= F_WRLCK
;
2804 if (res
.u
.denied
.type
& 1)
2805 request
->fl_type
= F_RDLCK
;
2806 request
->fl_pid
= 0;
2810 up_read(&clp
->cl_sem
);
2814 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2816 struct nfs4_exception exception
= { };
2820 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
2821 _nfs4_proc_getlk(state
, cmd
, request
),
2823 } while (exception
.retry
);
2827 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
2830 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
2832 res
= posix_lock_file_wait(file
, fl
);
2835 res
= flock_lock_file_wait(file
, fl
);
2841 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n",
2846 struct nfs4_unlockdata
{
2847 struct nfs_lockargs arg
;
2848 struct nfs_locku_opargs luargs
;
2849 struct nfs_lockres res
;
2850 struct nfs4_lock_state
*lsp
;
2851 struct nfs_open_context
*ctx
;
2853 struct completion completion
;
2856 static void nfs4_locku_release_calldata(struct nfs4_unlockdata
*calldata
)
2858 if (atomic_dec_and_test(&calldata
->refcount
)) {
2859 nfs_free_seqid(calldata
->luargs
.seqid
);
2860 nfs4_put_lock_state(calldata
->lsp
);
2861 put_nfs_open_context(calldata
->ctx
);
2866 static void nfs4_locku_complete(struct nfs4_unlockdata
*calldata
)
2868 complete(&calldata
->completion
);
2869 nfs4_locku_release_calldata(calldata
);
2872 static void nfs4_locku_done(struct rpc_task
*task
)
2874 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2876 nfs_increment_lock_seqid(task
->tk_status
, calldata
->luargs
.seqid
);
2877 switch (task
->tk_status
) {
2879 memcpy(calldata
->lsp
->ls_stateid
.data
,
2880 calldata
->res
.u
.stateid
.data
,
2881 sizeof(calldata
->lsp
->ls_stateid
.data
));
2883 case -NFS4ERR_STALE_STATEID
:
2884 case -NFS4ERR_EXPIRED
:
2885 nfs4_schedule_state_recovery(calldata
->res
.server
->nfs4_state
);
2888 if (nfs4_async_handle_error(task
, calldata
->res
.server
) == -EAGAIN
) {
2889 rpc_restart_call(task
);
2893 nfs4_locku_complete(calldata
);
2896 static void nfs4_locku_begin(struct rpc_task
*task
)
2898 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2899 struct rpc_message msg
= {
2900 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
2901 .rpc_argp
= &calldata
->arg
,
2902 .rpc_resp
= &calldata
->res
,
2903 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
2907 status
= nfs_wait_on_sequence(calldata
->luargs
.seqid
, task
);
2910 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
2911 nfs4_locku_complete(calldata
);
2912 task
->tk_exit
= NULL
;
2916 rpc_call_setup(task
, &msg
, 0);
2919 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2921 struct nfs4_unlockdata
*calldata
;
2922 struct inode
*inode
= state
->inode
;
2923 struct nfs_server
*server
= NFS_SERVER(inode
);
2924 struct nfs4_lock_state
*lsp
;
2927 status
= nfs4_set_lock_state(state
, request
);
2930 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2931 /* We might have lost the locks! */
2932 if ((lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0)
2934 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
2935 if (calldata
== NULL
)
2937 calldata
->luargs
.seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
2938 if (calldata
->luargs
.seqid
== NULL
) {
2942 calldata
->luargs
.stateid
= &lsp
->ls_stateid
;
2943 calldata
->arg
.fh
= NFS_FH(inode
);
2944 calldata
->arg
.type
= nfs4_lck_type(cmd
, request
);
2945 calldata
->arg
.offset
= request
->fl_start
;
2946 calldata
->arg
.length
= nfs4_lck_length(request
);
2947 calldata
->arg
.u
.locku
= &calldata
->luargs
;
2948 calldata
->res
.server
= server
;
2949 calldata
->lsp
= lsp
;
2950 atomic_inc(&lsp
->ls_count
);
2952 /* Ensure we don't close file until we're done freeing locks! */
2953 calldata
->ctx
= get_nfs_open_context((struct nfs_open_context
*)request
->fl_file
->private_data
);
2955 atomic_set(&calldata
->refcount
, 2);
2956 init_completion(&calldata
->completion
);
2958 status
= nfs4_call_async(NFS_SERVER(inode
)->client
, nfs4_locku_begin
,
2959 nfs4_locku_done
, calldata
);
2961 wait_for_completion_interruptible(&calldata
->completion
);
2962 do_vfs_lock(request
->fl_file
, request
);
2963 nfs4_locku_release_calldata(calldata
);
2967 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
, int reclaim
)
2969 struct inode
*inode
= state
->inode
;
2970 struct nfs_server
*server
= NFS_SERVER(inode
);
2971 struct nfs4_lock_state
*lsp
= request
->fl_u
.nfs4_fl
.owner
;
2972 struct nfs_lock_opargs largs
= {
2973 .lock_stateid
= &lsp
->ls_stateid
,
2974 .open_stateid
= &state
->stateid
,
2976 .clientid
= server
->nfs4_state
->cl_clientid
,
2981 struct nfs_lockargs arg
= {
2982 .fh
= NFS_FH(inode
),
2983 .type
= nfs4_lck_type(cmd
, request
),
2984 .offset
= request
->fl_start
,
2985 .length
= nfs4_lck_length(request
),
2990 struct nfs_lockres res
= {
2993 struct rpc_message msg
= {
2994 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
2997 .rpc_cred
= state
->owner
->so_cred
,
2999 int status
= -ENOMEM
;
3001 largs
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3002 if (largs
.lock_seqid
== NULL
)
3004 if (!(lsp
->ls_seqid
.flags
& NFS_SEQID_CONFIRMED
)) {
3005 struct nfs4_state_owner
*owner
= state
->owner
;
3007 largs
.open_seqid
= nfs_alloc_seqid(&owner
->so_seqid
);
3008 if (largs
.open_seqid
== NULL
)
3010 largs
.new_lock_owner
= 1;
3011 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
3012 /* increment open seqid on success, and seqid mutating errors */
3013 if (largs
.new_lock_owner
!= 0) {
3014 nfs_increment_open_seqid(status
, largs
.open_seqid
);
3016 nfs_confirm_seqid(&lsp
->ls_seqid
, 0);
3018 nfs_free_seqid(largs
.open_seqid
);
3020 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
3021 /* increment lock seqid on success, and seqid mutating errors*/
3022 nfs_increment_lock_seqid(status
, largs
.lock_seqid
);
3023 /* save the returned stateid. */
3025 memcpy(lsp
->ls_stateid
.data
, res
.u
.stateid
.data
,
3026 sizeof(lsp
->ls_stateid
.data
));
3027 lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3028 } else if (status
== -NFS4ERR_DENIED
)
3031 nfs_free_seqid(largs
.lock_seqid
);
3035 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3037 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3038 struct nfs4_exception exception
= { };
3042 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3043 if (err
!= -NFS4ERR_DELAY
)
3045 nfs4_handle_exception(server
, err
, &exception
);
3046 } while (exception
.retry
);
3050 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3052 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3053 struct nfs4_exception exception
= { };
3057 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3058 if (err
!= -NFS4ERR_DELAY
)
3060 nfs4_handle_exception(server
, err
, &exception
);
3061 } while (exception
.retry
);
3065 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3067 struct nfs4_client
*clp
= state
->owner
->so_client
;
3070 down_read(&clp
->cl_sem
);
3071 status
= nfs4_set_lock_state(state
, request
);
3073 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3075 /* Note: we always want to sleep here! */
3076 request
->fl_flags
|= FL_SLEEP
;
3077 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3078 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3080 up_read(&clp
->cl_sem
);
3084 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3086 struct nfs4_exception exception
= { };
3090 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3091 _nfs4_proc_setlk(state
, cmd
, request
),
3093 } while (exception
.retry
);
3098 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3100 struct nfs_open_context
*ctx
;
3101 struct nfs4_state
*state
;
3102 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3105 /* verify open state */
3106 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3109 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3113 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3115 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3118 if (request
->fl_type
== F_UNLCK
)
3119 return nfs4_proc_unlck(state
, cmd
, request
);
3122 status
= nfs4_proc_setlk(state
, cmd
, request
);
3123 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3125 timeout
= nfs4_set_lock_task_retry(timeout
);
3126 status
= -ERESTARTSYS
;
3129 } while(status
< 0);
3134 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3136 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3137 size_t buflen
, int flags
)
3139 struct inode
*inode
= dentry
->d_inode
;
3141 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3144 if (!S_ISREG(inode
->i_mode
) &&
3145 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3148 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3151 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3152 * and that's what we'll do for e.g. user attributes that haven't been set.
3153 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3154 * attributes in kernel-managed attribute namespaces. */
3155 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3158 struct inode
*inode
= dentry
->d_inode
;
3160 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3163 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3166 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3168 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3170 if (buf
&& buflen
< len
)
3173 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3177 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3178 .recover_open
= nfs4_open_reclaim
,
3179 .recover_lock
= nfs4_lock_reclaim
,
3182 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3183 .recover_open
= nfs4_open_expired
,
3184 .recover_lock
= nfs4_lock_expired
,
3187 static struct inode_operations nfs4_file_inode_operations
= {
3188 .permission
= nfs_permission
,
3189 .getattr
= nfs_getattr
,
3190 .setattr
= nfs_setattr
,
3191 .getxattr
= nfs4_getxattr
,
3192 .setxattr
= nfs4_setxattr
,
3193 .listxattr
= nfs4_listxattr
,
3196 struct nfs_rpc_ops nfs_v4_clientops
= {
3197 .version
= 4, /* protocol version */
3198 .dentry_ops
= &nfs4_dentry_operations
,
3199 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3200 .file_inode_ops
= &nfs4_file_inode_operations
,
3201 .getroot
= nfs4_proc_get_root
,
3202 .getattr
= nfs4_proc_getattr
,
3203 .setattr
= nfs4_proc_setattr
,
3204 .lookup
= nfs4_proc_lookup
,
3205 .access
= nfs4_proc_access
,
3206 .readlink
= nfs4_proc_readlink
,
3207 .read
= nfs4_proc_read
,
3208 .write
= nfs4_proc_write
,
3209 .commit
= nfs4_proc_commit
,
3210 .create
= nfs4_proc_create
,
3211 .remove
= nfs4_proc_remove
,
3212 .unlink_setup
= nfs4_proc_unlink_setup
,
3213 .unlink_done
= nfs4_proc_unlink_done
,
3214 .rename
= nfs4_proc_rename
,
3215 .link
= nfs4_proc_link
,
3216 .symlink
= nfs4_proc_symlink
,
3217 .mkdir
= nfs4_proc_mkdir
,
3218 .rmdir
= nfs4_proc_remove
,
3219 .readdir
= nfs4_proc_readdir
,
3220 .mknod
= nfs4_proc_mknod
,
3221 .statfs
= nfs4_proc_statfs
,
3222 .fsinfo
= nfs4_proc_fsinfo
,
3223 .pathconf
= nfs4_proc_pathconf
,
3224 .decode_dirent
= nfs4_decode_dirent
,
3225 .read_setup
= nfs4_proc_read_setup
,
3226 .write_setup
= nfs4_proc_write_setup
,
3227 .commit_setup
= nfs4_proc_commit_setup
,
3228 .file_open
= nfs_open
,
3229 .file_release
= nfs_release
,
3230 .lock
= nfs4_proc_lock
,
3231 .clear_acl_cache
= nfs4_zap_acl_attr
,