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_byowner() */
218 spin_lock(&state
->owner
->so_lock
);
219 spin_lock(&inode
->i_lock
);
220 memcpy(&state
->stateid
, stateid
, sizeof(state
->stateid
));
221 if ((open_flags
& FMODE_WRITE
))
223 if (open_flags
& FMODE_READ
)
225 nfs4_state_set_mode_locked(state
, state
->state
| open_flags
);
226 spin_unlock(&inode
->i_lock
);
227 spin_unlock(&state
->owner
->so_lock
);
232 * reclaim state on the server after a reboot.
234 static int _nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
236 struct inode
*inode
= state
->inode
;
237 struct nfs_server
*server
= NFS_SERVER(inode
);
238 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
239 struct nfs_openargs o_arg
= {
242 .open_flags
= state
->state
,
243 .clientid
= server
->nfs4_state
->cl_clientid
,
244 .claim
= NFS4_OPEN_CLAIM_PREVIOUS
,
245 .bitmask
= server
->attr_bitmask
,
247 struct nfs_openres o_res
= {
248 .server
= server
, /* Grrr */
250 struct rpc_message msg
= {
251 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
254 .rpc_cred
= sp
->so_cred
,
258 if (delegation
!= NULL
) {
259 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
260 memcpy(&state
->stateid
, &delegation
->stateid
,
261 sizeof(state
->stateid
));
262 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
265 o_arg
.u
.delegation_type
= delegation
->type
;
267 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
268 if (o_arg
.seqid
== NULL
)
270 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
271 /* Confirm the sequence as being established */
272 nfs_confirm_seqid(&sp
->so_seqid
, status
);
273 nfs_increment_open_seqid(status
, o_arg
.seqid
);
275 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
276 if (o_res
.delegation_type
!= 0) {
277 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
278 /* Did the server issue an immediate delegation recall? */
280 nfs_async_inode_return_delegation(inode
, &o_res
.stateid
);
283 nfs_free_seqid(o_arg
.seqid
);
284 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
285 /* Ensure we update the inode attributes */
290 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
292 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
293 struct nfs4_exception exception
= { };
296 err
= _nfs4_open_reclaim(sp
, state
);
297 if (err
!= -NFS4ERR_DELAY
)
299 nfs4_handle_exception(server
, err
, &exception
);
300 } while (exception
.retry
);
304 static int _nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
306 struct nfs4_state_owner
*sp
= state
->owner
;
307 struct inode
*inode
= dentry
->d_inode
;
308 struct nfs_server
*server
= NFS_SERVER(inode
);
309 struct dentry
*parent
= dget_parent(dentry
);
310 struct nfs_openargs arg
= {
311 .fh
= NFS_FH(parent
->d_inode
),
312 .clientid
= server
->nfs4_state
->cl_clientid
,
313 .name
= &dentry
->d_name
,
316 .bitmask
= server
->attr_bitmask
,
317 .claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
,
319 struct nfs_openres res
= {
322 struct rpc_message msg
= {
323 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
],
326 .rpc_cred
= sp
->so_cred
,
330 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
332 if (state
->state
== 0)
334 arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
336 if (arg
.seqid
== NULL
)
338 arg
.open_flags
= state
->state
;
339 memcpy(arg
.u
.delegation
.data
, state
->stateid
.data
, sizeof(arg
.u
.delegation
.data
));
340 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
341 nfs_increment_open_seqid(status
, arg
.seqid
);
344 if(res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
345 status
= _nfs4_proc_open_confirm(server
->client
, NFS_FH(inode
),
346 sp
, &res
.stateid
, arg
.seqid
);
350 nfs_confirm_seqid(&sp
->so_seqid
, 0);
352 memcpy(state
->stateid
.data
, res
.stateid
.data
,
353 sizeof(state
->stateid
.data
));
354 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
357 nfs_free_seqid(arg
.seqid
);
363 int nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
365 struct nfs4_exception exception
= { };
366 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
369 err
= _nfs4_open_delegation_recall(dentry
, state
);
373 case -NFS4ERR_STALE_CLIENTID
:
374 case -NFS4ERR_STALE_STATEID
:
375 case -NFS4ERR_EXPIRED
:
376 /* Don't recall a delegation if it was lost */
377 nfs4_schedule_state_recovery(server
->nfs4_state
);
380 err
= nfs4_handle_exception(server
, err
, &exception
);
381 } while (exception
.retry
);
385 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
)
387 struct nfs_open_confirmargs arg
= {
392 struct nfs_open_confirmres res
;
393 struct rpc_message msg
= {
394 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
397 .rpc_cred
= sp
->so_cred
,
401 status
= rpc_call_sync(clnt
, &msg
, RPC_TASK_NOINTR
);
402 /* Confirm the sequence as being established */
403 nfs_confirm_seqid(&sp
->so_seqid
, status
);
404 nfs_increment_open_seqid(status
, seqid
);
406 memcpy(stateid
, &res
.stateid
, sizeof(*stateid
));
410 static int _nfs4_proc_open(struct inode
*dir
, struct nfs4_state_owner
*sp
, struct nfs_openargs
*o_arg
, struct nfs_openres
*o_res
)
412 struct nfs_server
*server
= NFS_SERVER(dir
);
413 struct rpc_message msg
= {
414 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
417 .rpc_cred
= sp
->so_cred
,
421 /* Update sequence id. The caller must serialize! */
422 o_arg
->id
= sp
->so_id
;
423 o_arg
->clientid
= sp
->so_client
->cl_clientid
;
425 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
427 /* OPEN on anything except a regular file is disallowed in NFSv4 */
428 switch (o_res
->f_attr
->mode
& S_IFMT
) {
442 nfs_increment_open_seqid(status
, o_arg
->seqid
);
445 if (o_arg
->open_flags
& O_CREAT
) {
446 update_changeattr(dir
, &o_res
->cinfo
);
447 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
449 nfs_refresh_inode(dir
, o_res
->dir_attr
);
450 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
451 status
= _nfs4_proc_open_confirm(server
->client
, &o_res
->fh
,
452 sp
, &o_res
->stateid
, o_arg
->seqid
);
456 nfs_confirm_seqid(&sp
->so_seqid
, 0);
457 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
458 status
= server
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
463 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
465 struct nfs_access_entry cache
;
469 if (openflags
& FMODE_READ
)
471 if (openflags
& FMODE_WRITE
)
473 status
= nfs_access_get_cached(inode
, cred
, &cache
);
477 /* Be clever: ask server to check for all possible rights */
478 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
480 cache
.jiffies
= jiffies
;
481 status
= _nfs4_proc_access(inode
, &cache
);
484 nfs_access_add_cache(inode
, &cache
);
486 if ((cache
.mask
& mask
) == mask
)
493 * reclaim state on the server after a network partition.
494 * Assumes caller holds the appropriate lock
496 static int _nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
498 struct dentry
*parent
= dget_parent(dentry
);
499 struct inode
*dir
= parent
->d_inode
;
500 struct inode
*inode
= state
->inode
;
501 struct nfs_server
*server
= NFS_SERVER(dir
);
502 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
503 struct nfs_fattr f_attr
, dir_attr
;
504 struct nfs_openargs o_arg
= {
506 .open_flags
= state
->state
,
507 .name
= &dentry
->d_name
,
508 .bitmask
= server
->attr_bitmask
,
509 .claim
= NFS4_OPEN_CLAIM_NULL
,
511 struct nfs_openres o_res
= {
513 .dir_attr
= &dir_attr
,
518 if (delegation
!= NULL
&& !(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
519 status
= _nfs4_do_access(inode
, sp
->so_cred
, state
->state
);
522 memcpy(&state
->stateid
, &delegation
->stateid
, sizeof(state
->stateid
));
523 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
526 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
528 if (o_arg
.seqid
== NULL
)
530 nfs_fattr_init(&f_attr
);
531 nfs_fattr_init(&dir_attr
);
532 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
535 /* Check if files differ */
536 if ((f_attr
.mode
& S_IFMT
) != (inode
->i_mode
& S_IFMT
))
538 /* Has the file handle changed? */
539 if (nfs_compare_fh(&o_res
.fh
, NFS_FH(inode
)) != 0) {
540 /* Verify if the change attributes are the same */
541 if (f_attr
.change_attr
!= NFS_I(inode
)->change_attr
)
543 if (nfs_size_to_loff_t(f_attr
.size
) != inode
->i_size
)
545 /* Lets just pretend that this is the same file */
546 nfs_copy_fh(NFS_FH(inode
), &o_res
.fh
);
547 NFS_I(inode
)->fileid
= f_attr
.fileid
;
549 memcpy(&state
->stateid
, &o_res
.stateid
, sizeof(state
->stateid
));
550 if (o_res
.delegation_type
!= 0) {
551 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
))
552 nfs_inode_set_delegation(inode
, sp
->so_cred
, &o_res
);
554 nfs_inode_reclaim_delegation(inode
, sp
->so_cred
, &o_res
);
557 nfs_free_seqid(o_arg
.seqid
);
558 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
564 /* Invalidate the state owner so we don't ever use it again */
565 nfs4_drop_state_owner(sp
);
567 /* Should we be trying to close that stateid? */
571 static inline int nfs4_do_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
573 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
574 struct nfs4_exception exception
= { };
578 err
= _nfs4_open_expired(sp
, state
, dentry
);
579 if (err
== -NFS4ERR_DELAY
)
580 nfs4_handle_exception(server
, err
, &exception
);
581 } while (exception
.retry
);
585 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
587 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
588 struct nfs_open_context
*ctx
;
591 spin_lock(&state
->inode
->i_lock
);
592 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
593 if (ctx
->state
!= state
)
595 get_nfs_open_context(ctx
);
596 spin_unlock(&state
->inode
->i_lock
);
597 status
= nfs4_do_open_expired(sp
, state
, ctx
->dentry
);
598 put_nfs_open_context(ctx
);
601 spin_unlock(&state
->inode
->i_lock
);
606 * Returns an nfs4_state + an extra reference to the inode
608 static int _nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
610 struct nfs_delegation
*delegation
;
611 struct nfs_server
*server
= NFS_SERVER(inode
);
612 struct nfs4_client
*clp
= server
->nfs4_state
;
613 struct nfs_inode
*nfsi
= NFS_I(inode
);
614 struct nfs4_state_owner
*sp
= NULL
;
615 struct nfs4_state
*state
= NULL
;
616 int open_flags
= flags
& (FMODE_READ
|FMODE_WRITE
);
619 /* Protect against reboot recovery - NOTE ORDER! */
620 down_read(&clp
->cl_sem
);
621 /* Protect against delegation recall */
622 down_read(&nfsi
->rwsem
);
623 delegation
= NFS_I(inode
)->delegation
;
625 if (delegation
== NULL
|| (delegation
->type
& open_flags
) != open_flags
)
628 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
629 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__
);
632 state
= nfs4_get_open_state(inode
, sp
);
637 if ((state
->state
& open_flags
) == open_flags
) {
638 spin_lock(&inode
->i_lock
);
639 if (open_flags
& FMODE_READ
)
641 if (open_flags
& FMODE_WRITE
)
643 spin_unlock(&inode
->i_lock
);
645 } else if (state
->state
!= 0)
649 err
= _nfs4_do_access(inode
, cred
, open_flags
);
653 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
654 update_open_stateid(state
, &delegation
->stateid
, open_flags
);
656 nfs4_put_state_owner(sp
);
657 up_read(&nfsi
->rwsem
);
658 up_read(&clp
->cl_sem
);
665 nfs4_put_open_state(state
);
666 nfs4_put_state_owner(sp
);
668 up_read(&nfsi
->rwsem
);
669 up_read(&clp
->cl_sem
);
671 nfs_inode_return_delegation(inode
);
675 static struct nfs4_state
*nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
)
677 struct nfs4_exception exception
= { };
678 struct nfs4_state
*res
;
682 err
= _nfs4_open_delegated(inode
, flags
, cred
, &res
);
685 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode
),
687 } while (exception
.retry
);
692 * Returns an nfs4_state + an referenced inode
694 static int _nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
696 struct nfs4_state_owner
*sp
;
697 struct nfs4_state
*state
= NULL
;
698 struct nfs_server
*server
= NFS_SERVER(dir
);
699 struct nfs4_client
*clp
= server
->nfs4_state
;
700 struct inode
*inode
= NULL
;
702 struct nfs_fattr f_attr
, dir_attr
;
703 struct nfs_openargs o_arg
= {
706 .name
= &dentry
->d_name
,
708 .bitmask
= server
->attr_bitmask
,
709 .claim
= NFS4_OPEN_CLAIM_NULL
,
711 struct nfs_openres o_res
= {
713 .dir_attr
= &dir_attr
,
717 /* Protect against reboot recovery conflicts */
718 down_read(&clp
->cl_sem
);
720 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
721 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
724 if (flags
& O_EXCL
) {
725 u32
*p
= (u32
*) o_arg
.u
.verifier
.data
;
729 o_arg
.u
.attrs
= sattr
;
730 /* Serialization for the sequence id */
732 o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
733 if (o_arg
.seqid
== NULL
)
735 nfs_fattr_init(&f_attr
);
736 nfs_fattr_init(&dir_attr
);
737 status
= _nfs4_proc_open(dir
, sp
, &o_arg
, &o_res
);
742 inode
= nfs_fhget(dir
->i_sb
, &o_res
.fh
, &f_attr
);
745 state
= nfs4_get_open_state(inode
, sp
);
748 update_open_stateid(state
, &o_res
.stateid
, flags
);
749 if (o_res
.delegation_type
!= 0)
750 nfs_inode_set_delegation(inode
, cred
, &o_res
);
751 nfs_free_seqid(o_arg
.seqid
);
752 nfs4_put_state_owner(sp
);
753 up_read(&clp
->cl_sem
);
759 nfs4_put_open_state(state
);
760 nfs_free_seqid(o_arg
.seqid
);
761 nfs4_put_state_owner(sp
);
763 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
764 up_read(&clp
->cl_sem
);
772 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
774 struct nfs4_exception exception
= { };
775 struct nfs4_state
*res
;
779 status
= _nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
, &res
);
782 /* NOTE: BAD_SEQID means the server and client disagree about the
783 * book-keeping w.r.t. state-changing operations
784 * (OPEN/CLOSE/LOCK/LOCKU...)
785 * It is actually a sign of a bug on the client or on the server.
787 * If we receive a BAD_SEQID error in the particular case of
788 * doing an OPEN, we assume that nfs_increment_open_seqid() will
789 * have unhashed the old state_owner for us, and that we can
790 * therefore safely retry using a new one. We should still warn
793 if (status
== -NFS4ERR_BAD_SEQID
) {
794 printk(KERN_WARNING
"NFS: v4 server returned a bad sequence-id error!\n");
799 * BAD_STATEID on OPEN means that the server cancelled our
800 * state before it received the OPEN_CONFIRM.
801 * Recover by retrying the request as per the discussion
802 * on Page 181 of RFC3530.
804 if (status
== -NFS4ERR_BAD_STATEID
) {
808 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
809 status
, &exception
));
810 } while (exception
.retry
);
814 static int _nfs4_do_setattr(struct nfs_server
*server
, struct nfs_fattr
*fattr
,
815 struct nfs_fh
*fhandle
, struct iattr
*sattr
,
816 struct nfs4_state
*state
)
818 struct nfs_setattrargs arg
= {
822 .bitmask
= server
->attr_bitmask
,
824 struct nfs_setattrres res
= {
828 struct rpc_message msg
= {
829 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
835 nfs_fattr_init(fattr
);
838 msg
.rpc_cred
= state
->owner
->so_cred
;
839 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
841 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
843 status
= rpc_call_sync(server
->client
, &msg
, 0);
847 static int nfs4_do_setattr(struct nfs_server
*server
, struct nfs_fattr
*fattr
,
848 struct nfs_fh
*fhandle
, struct iattr
*sattr
,
849 struct nfs4_state
*state
)
851 struct nfs4_exception exception
= { };
854 err
= nfs4_handle_exception(server
,
855 _nfs4_do_setattr(server
, fattr
, fhandle
, sattr
,
858 } while (exception
.retry
);
862 struct nfs4_closedata
{
864 struct nfs4_state
*state
;
865 struct nfs_closeargs arg
;
866 struct nfs_closeres res
;
867 struct nfs_fattr fattr
;
870 static void nfs4_free_closedata(struct nfs4_closedata
*calldata
)
872 struct nfs4_state
*state
= calldata
->state
;
873 struct nfs4_state_owner
*sp
= state
->owner
;
875 nfs4_put_open_state(calldata
->state
);
876 nfs_free_seqid(calldata
->arg
.seqid
);
877 nfs4_put_state_owner(sp
);
881 static void nfs4_close_done(struct rpc_task
*task
)
883 struct nfs4_closedata
*calldata
= (struct nfs4_closedata
*)task
->tk_calldata
;
884 struct nfs4_state
*state
= calldata
->state
;
885 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
887 /* hmm. we are done with the inode, and in the process of freeing
888 * the state_owner. we keep this around to process errors
890 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
891 switch (task
->tk_status
) {
893 memcpy(&state
->stateid
, &calldata
->res
.stateid
,
894 sizeof(state
->stateid
));
896 case -NFS4ERR_STALE_STATEID
:
897 case -NFS4ERR_EXPIRED
:
898 nfs4_schedule_state_recovery(server
->nfs4_state
);
901 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
902 rpc_restart_call(task
);
906 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
907 nfs4_free_closedata(calldata
);
910 static void nfs4_close_begin(struct rpc_task
*task
)
912 struct nfs4_closedata
*calldata
= (struct nfs4_closedata
*)task
->tk_calldata
;
913 struct nfs4_state
*state
= calldata
->state
;
914 struct rpc_message msg
= {
915 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
916 .rpc_argp
= &calldata
->arg
,
917 .rpc_resp
= &calldata
->res
,
918 .rpc_cred
= state
->owner
->so_cred
,
920 int mode
= 0, old_mode
;
923 status
= nfs_wait_on_sequence(calldata
->arg
.seqid
, task
);
926 /* Recalculate the new open mode in case someone reopened the file
927 * while we were waiting in line to be scheduled.
929 spin_lock(&state
->owner
->so_lock
);
930 spin_lock(&calldata
->inode
->i_lock
);
931 mode
= old_mode
= state
->state
;
932 if (state
->nreaders
== 0)
934 if (state
->nwriters
== 0)
935 mode
&= ~FMODE_WRITE
;
936 nfs4_state_set_mode_locked(state
, mode
);
937 spin_unlock(&calldata
->inode
->i_lock
);
938 spin_unlock(&state
->owner
->so_lock
);
939 if (mode
== old_mode
|| test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
940 nfs4_free_closedata(calldata
);
941 task
->tk_exit
= NULL
;
945 nfs_fattr_init(calldata
->res
.fattr
);
947 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
948 calldata
->arg
.open_flags
= mode
;
949 rpc_call_setup(task
, &msg
, 0);
953 * It is possible for data to be read/written from a mem-mapped file
954 * after the sys_close call (which hits the vfs layer as a flush).
955 * This means that we can't safely call nfsv4 close on a file until
956 * the inode is cleared. This in turn means that we are not good
957 * NFSv4 citizens - we do not indicate to the server to update the file's
958 * share state even when we are done with one of the three share
959 * stateid's in the inode.
961 * NOTE: Caller must be holding the sp->so_owner semaphore!
963 int nfs4_do_close(struct inode
*inode
, struct nfs4_state
*state
)
965 struct nfs_server
*server
= NFS_SERVER(inode
);
966 struct nfs4_closedata
*calldata
;
967 int status
= -ENOMEM
;
969 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
970 if (calldata
== NULL
)
972 calldata
->inode
= inode
;
973 calldata
->state
= state
;
974 calldata
->arg
.fh
= NFS_FH(inode
);
975 calldata
->arg
.stateid
= &state
->stateid
;
976 /* Serialization for the sequence id */
977 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
978 if (calldata
->arg
.seqid
== NULL
)
979 goto out_free_calldata
;
980 calldata
->arg
.bitmask
= server
->attr_bitmask
;
981 calldata
->res
.fattr
= &calldata
->fattr
;
982 calldata
->res
.server
= server
;
984 status
= nfs4_call_async(server
->client
, nfs4_close_begin
,
985 nfs4_close_done
, calldata
);
989 nfs_free_seqid(calldata
->arg
.seqid
);
996 static void nfs4_intent_set_file(struct nameidata
*nd
, struct dentry
*dentry
, struct nfs4_state
*state
)
1000 filp
= lookup_instantiate_filp(nd
, dentry
, NULL
);
1001 if (!IS_ERR(filp
)) {
1002 struct nfs_open_context
*ctx
;
1003 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1006 nfs4_close_state(state
, nd
->intent
.open
.flags
);
1010 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1013 struct rpc_cred
*cred
;
1014 struct nfs4_state
*state
;
1017 if (nd
->flags
& LOOKUP_CREATE
) {
1018 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1019 attr
.ia_valid
= ATTR_MODE
;
1020 if (!IS_POSIXACL(dir
))
1021 attr
.ia_mode
&= ~current
->fs
->umask
;
1024 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1027 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1029 return (struct dentry
*)cred
;
1030 state
= nfs4_do_open(dir
, dentry
, nd
->intent
.open
.flags
, &attr
, cred
);
1032 if (IS_ERR(state
)) {
1033 if (PTR_ERR(state
) == -ENOENT
)
1034 d_add(dentry
, NULL
);
1035 return (struct dentry
*)state
;
1037 res
= d_add_unique(dentry
, state
->inode
);
1040 nfs4_intent_set_file(nd
, dentry
, state
);
1045 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1047 struct rpc_cred
*cred
;
1048 struct nfs4_state
*state
;
1049 struct inode
*inode
;
1051 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1053 return PTR_ERR(cred
);
1054 state
= nfs4_open_delegated(dentry
->d_inode
, openflags
, cred
);
1056 state
= nfs4_do_open(dir
, dentry
, openflags
, NULL
, cred
);
1058 if (IS_ERR(state
)) {
1059 switch (PTR_ERR(state
)) {
1065 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1068 if (dentry
->d_inode
== NULL
)
1073 inode
= state
->inode
;
1075 if (inode
== dentry
->d_inode
) {
1076 nfs4_intent_set_file(nd
, dentry
, state
);
1079 nfs4_close_state(state
, openflags
);
1086 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1088 struct nfs4_server_caps_res res
= {};
1089 struct rpc_message msg
= {
1090 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1091 .rpc_argp
= fhandle
,
1096 status
= rpc_call_sync(server
->client
, &msg
, 0);
1098 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1099 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1100 server
->caps
|= NFS_CAP_ACLS
;
1101 if (res
.has_links
!= 0)
1102 server
->caps
|= NFS_CAP_HARDLINKS
;
1103 if (res
.has_symlinks
!= 0)
1104 server
->caps
|= NFS_CAP_SYMLINKS
;
1105 server
->acl_bitmask
= res
.acl_bitmask
;
1110 static int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1112 struct nfs4_exception exception
= { };
1115 err
= nfs4_handle_exception(server
,
1116 _nfs4_server_capabilities(server
, fhandle
),
1118 } while (exception
.retry
);
1122 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1123 struct nfs_fsinfo
*info
)
1125 struct nfs4_lookup_root_arg args
= {
1126 .bitmask
= nfs4_fattr_bitmap
,
1128 struct nfs4_lookup_res res
= {
1130 .fattr
= info
->fattr
,
1133 struct rpc_message msg
= {
1134 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1138 nfs_fattr_init(info
->fattr
);
1139 return rpc_call_sync(server
->client
, &msg
, 0);
1142 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1143 struct nfs_fsinfo
*info
)
1145 struct nfs4_exception exception
= { };
1148 err
= nfs4_handle_exception(server
,
1149 _nfs4_lookup_root(server
, fhandle
, info
),
1151 } while (exception
.retry
);
1155 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1156 struct nfs_fsinfo
*info
)
1158 struct nfs_fattr
* fattr
= info
->fattr
;
1161 struct nfs4_lookup_arg args
= {
1164 .bitmask
= nfs4_fattr_bitmap
,
1166 struct nfs4_lookup_res res
= {
1171 struct rpc_message msg
= {
1172 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1179 * Now we do a separate LOOKUP for each component of the mount path.
1180 * The LOOKUPs are done separately so that we can conveniently
1181 * catch an ERR_WRONGSEC if it occurs along the way...
1183 status
= nfs4_lookup_root(server
, fhandle
, info
);
1187 p
= server
->mnt_path
;
1189 struct nfs4_exception exception
= { };
1196 while (*p
&& (*p
!= '/'))
1201 nfs_fattr_init(fattr
);
1202 status
= nfs4_handle_exception(server
,
1203 rpc_call_sync(server
->client
, &msg
, 0),
1205 } while (exception
.retry
);
1208 if (status
== -ENOENT
) {
1209 printk(KERN_NOTICE
"NFS: mount path %s does not exist!\n", server
->mnt_path
);
1210 printk(KERN_NOTICE
"NFS: suggestion: try mounting '/' instead.\n");
1215 status
= nfs4_server_capabilities(server
, fhandle
);
1217 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1222 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1224 struct nfs4_getattr_arg args
= {
1226 .bitmask
= server
->attr_bitmask
,
1228 struct nfs4_getattr_res res
= {
1232 struct rpc_message msg
= {
1233 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1238 nfs_fattr_init(fattr
);
1239 return rpc_call_sync(server
->client
, &msg
, 0);
1242 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1244 struct nfs4_exception exception
= { };
1247 err
= nfs4_handle_exception(server
,
1248 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1250 } while (exception
.retry
);
1255 * The file is not closed if it is opened due to the a request to change
1256 * the size of the file. The open call will not be needed once the
1257 * VFS layer lookup-intents are implemented.
1259 * Close is called when the inode is destroyed.
1260 * If we haven't opened the file for O_WRONLY, we
1261 * need to in the size_change case to obtain a stateid.
1264 * Because OPEN is always done by name in nfsv4, it is
1265 * possible that we opened a different file by the same
1266 * name. We can recognize this race condition, but we
1267 * can't do anything about it besides returning an error.
1269 * This will be fixed with VFS changes (lookup-intent).
1272 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1273 struct iattr
*sattr
)
1275 struct rpc_cred
*cred
;
1276 struct inode
*inode
= dentry
->d_inode
;
1277 struct nfs_open_context
*ctx
;
1278 struct nfs4_state
*state
= NULL
;
1281 nfs_fattr_init(fattr
);
1283 cred
= rpcauth_lookupcred(NFS_SERVER(inode
)->client
->cl_auth
, 0);
1285 return PTR_ERR(cred
);
1287 /* Search for an existing open(O_WRITE) file */
1288 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1292 status
= nfs4_do_setattr(NFS_SERVER(inode
), fattr
,
1293 NFS_FH(inode
), sattr
, state
);
1295 nfs_setattr_update_inode(inode
, sattr
);
1297 put_nfs_open_context(ctx
);
1302 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1303 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1306 struct nfs_server
*server
= NFS_SERVER(dir
);
1307 struct nfs4_lookup_arg args
= {
1308 .bitmask
= server
->attr_bitmask
,
1309 .dir_fh
= NFS_FH(dir
),
1312 struct nfs4_lookup_res res
= {
1317 struct rpc_message msg
= {
1318 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1323 nfs_fattr_init(fattr
);
1325 dprintk("NFS call lookup %s\n", name
->name
);
1326 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1327 dprintk("NFS reply lookup: %d\n", status
);
1331 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1333 struct nfs4_exception exception
= { };
1336 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1337 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1339 } while (exception
.retry
);
1343 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1345 struct nfs4_accessargs args
= {
1346 .fh
= NFS_FH(inode
),
1348 struct nfs4_accessres res
= { 0 };
1349 struct rpc_message msg
= {
1350 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1353 .rpc_cred
= entry
->cred
,
1355 int mode
= entry
->mask
;
1359 * Determine which access bits we want to ask for...
1361 if (mode
& MAY_READ
)
1362 args
.access
|= NFS4_ACCESS_READ
;
1363 if (S_ISDIR(inode
->i_mode
)) {
1364 if (mode
& MAY_WRITE
)
1365 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1366 if (mode
& MAY_EXEC
)
1367 args
.access
|= NFS4_ACCESS_LOOKUP
;
1369 if (mode
& MAY_WRITE
)
1370 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1371 if (mode
& MAY_EXEC
)
1372 args
.access
|= NFS4_ACCESS_EXECUTE
;
1374 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1377 if (res
.access
& NFS4_ACCESS_READ
)
1378 entry
->mask
|= MAY_READ
;
1379 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1380 entry
->mask
|= MAY_WRITE
;
1381 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1382 entry
->mask
|= MAY_EXEC
;
1387 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1389 struct nfs4_exception exception
= { };
1392 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1393 _nfs4_proc_access(inode
, entry
),
1395 } while (exception
.retry
);
1400 * TODO: For the time being, we don't try to get any attributes
1401 * along with any of the zero-copy operations READ, READDIR,
1404 * In the case of the first three, we want to put the GETATTR
1405 * after the read-type operation -- this is because it is hard
1406 * to predict the length of a GETATTR response in v4, and thus
1407 * align the READ data correctly. This means that the GETATTR
1408 * may end up partially falling into the page cache, and we should
1409 * shift it into the 'tail' of the xdr_buf before processing.
1410 * To do this efficiently, we need to know the total length
1411 * of data received, which doesn't seem to be available outside
1414 * In the case of WRITE, we also want to put the GETATTR after
1415 * the operation -- in this case because we want to make sure
1416 * we get the post-operation mtime and size. This means that
1417 * we can't use xdr_encode_pages() as written: we need a variant
1418 * of it which would leave room in the 'tail' iovec.
1420 * Both of these changes to the XDR layer would in fact be quite
1421 * minor, but I decided to leave them for a subsequent patch.
1423 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1424 unsigned int pgbase
, unsigned int pglen
)
1426 struct nfs4_readlink args
= {
1427 .fh
= NFS_FH(inode
),
1432 struct rpc_message msg
= {
1433 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1438 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1441 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1442 unsigned int pgbase
, unsigned int pglen
)
1444 struct nfs4_exception exception
= { };
1447 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1448 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1450 } while (exception
.retry
);
1454 static int _nfs4_proc_read(struct nfs_read_data
*rdata
)
1456 int flags
= rdata
->flags
;
1457 struct inode
*inode
= rdata
->inode
;
1458 struct nfs_fattr
*fattr
= rdata
->res
.fattr
;
1459 struct nfs_server
*server
= NFS_SERVER(inode
);
1460 struct rpc_message msg
= {
1461 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
1462 .rpc_argp
= &rdata
->args
,
1463 .rpc_resp
= &rdata
->res
,
1464 .rpc_cred
= rdata
->cred
,
1466 unsigned long timestamp
= jiffies
;
1469 dprintk("NFS call read %d @ %Ld\n", rdata
->args
.count
,
1470 (long long) rdata
->args
.offset
);
1472 nfs_fattr_init(fattr
);
1473 status
= rpc_call_sync(server
->client
, &msg
, flags
);
1475 renew_lease(server
, timestamp
);
1476 dprintk("NFS reply read: %d\n", status
);
1480 static int nfs4_proc_read(struct nfs_read_data
*rdata
)
1482 struct nfs4_exception exception
= { };
1485 err
= nfs4_handle_exception(NFS_SERVER(rdata
->inode
),
1486 _nfs4_proc_read(rdata
),
1488 } while (exception
.retry
);
1492 static int _nfs4_proc_write(struct nfs_write_data
*wdata
)
1494 int rpcflags
= wdata
->flags
;
1495 struct inode
*inode
= wdata
->inode
;
1496 struct nfs_fattr
*fattr
= wdata
->res
.fattr
;
1497 struct nfs_server
*server
= NFS_SERVER(inode
);
1498 struct rpc_message msg
= {
1499 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
1500 .rpc_argp
= &wdata
->args
,
1501 .rpc_resp
= &wdata
->res
,
1502 .rpc_cred
= wdata
->cred
,
1506 dprintk("NFS call write %d @ %Ld\n", wdata
->args
.count
,
1507 (long long) wdata
->args
.offset
);
1509 wdata
->args
.bitmask
= server
->attr_bitmask
;
1510 wdata
->res
.server
= server
;
1511 nfs_fattr_init(fattr
);
1512 status
= rpc_call_sync(server
->client
, &msg
, rpcflags
);
1513 dprintk("NFS reply write: %d\n", status
);
1516 nfs_post_op_update_inode(inode
, fattr
);
1517 return wdata
->res
.count
;
1520 static int nfs4_proc_write(struct nfs_write_data
*wdata
)
1522 struct nfs4_exception exception
= { };
1525 err
= nfs4_handle_exception(NFS_SERVER(wdata
->inode
),
1526 _nfs4_proc_write(wdata
),
1528 } while (exception
.retry
);
1532 static int _nfs4_proc_commit(struct nfs_write_data
*cdata
)
1534 struct inode
*inode
= cdata
->inode
;
1535 struct nfs_fattr
*fattr
= cdata
->res
.fattr
;
1536 struct nfs_server
*server
= NFS_SERVER(inode
);
1537 struct rpc_message msg
= {
1538 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
1539 .rpc_argp
= &cdata
->args
,
1540 .rpc_resp
= &cdata
->res
,
1541 .rpc_cred
= cdata
->cred
,
1545 dprintk("NFS call commit %d @ %Ld\n", cdata
->args
.count
,
1546 (long long) cdata
->args
.offset
);
1548 cdata
->args
.bitmask
= server
->attr_bitmask
;
1549 cdata
->res
.server
= server
;
1550 nfs_fattr_init(fattr
);
1551 status
= rpc_call_sync(server
->client
, &msg
, 0);
1552 dprintk("NFS reply commit: %d\n", status
);
1554 nfs_post_op_update_inode(inode
, fattr
);
1558 static int nfs4_proc_commit(struct nfs_write_data
*cdata
)
1560 struct nfs4_exception exception
= { };
1563 err
= nfs4_handle_exception(NFS_SERVER(cdata
->inode
),
1564 _nfs4_proc_commit(cdata
),
1566 } while (exception
.retry
);
1572 * We will need to arrange for the VFS layer to provide an atomic open.
1573 * Until then, this create/open method is prone to inefficiency and race
1574 * conditions due to the lookup, create, and open VFS calls from sys_open()
1575 * placed on the wire.
1577 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1578 * The file will be opened again in the subsequent VFS open call
1579 * (nfs4_proc_file_open).
1581 * The open for read will just hang around to be used by any process that
1582 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1586 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1587 int flags
, struct nameidata
*nd
)
1589 struct nfs4_state
*state
;
1590 struct rpc_cred
*cred
;
1593 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1595 status
= PTR_ERR(cred
);
1598 state
= nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
);
1600 if (IS_ERR(state
)) {
1601 status
= PTR_ERR(state
);
1604 d_instantiate(dentry
, state
->inode
);
1605 if (flags
& O_EXCL
) {
1606 struct nfs_fattr fattr
;
1607 status
= nfs4_do_setattr(NFS_SERVER(dir
), &fattr
,
1608 NFS_FH(state
->inode
), sattr
, state
);
1610 nfs_setattr_update_inode(state
->inode
, sattr
);
1612 if (status
== 0 && nd
!= NULL
&& (nd
->flags
& LOOKUP_OPEN
))
1613 nfs4_intent_set_file(nd
, dentry
, state
);
1615 nfs4_close_state(state
, flags
);
1620 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1622 struct nfs_server
*server
= NFS_SERVER(dir
);
1623 struct nfs4_remove_arg args
= {
1626 .bitmask
= server
->attr_bitmask
,
1628 struct nfs_fattr dir_attr
;
1629 struct nfs4_remove_res res
= {
1631 .dir_attr
= &dir_attr
,
1633 struct rpc_message msg
= {
1634 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1640 nfs_fattr_init(res
.dir_attr
);
1641 status
= rpc_call_sync(server
->client
, &msg
, 0);
1643 update_changeattr(dir
, &res
.cinfo
);
1644 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1649 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1651 struct nfs4_exception exception
= { };
1654 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1655 _nfs4_proc_remove(dir
, name
),
1657 } while (exception
.retry
);
1661 struct unlink_desc
{
1662 struct nfs4_remove_arg args
;
1663 struct nfs4_remove_res res
;
1664 struct nfs_fattr dir_attr
;
1667 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1670 struct nfs_server
*server
= NFS_SERVER(dir
->d_inode
);
1671 struct unlink_desc
*up
;
1673 up
= (struct unlink_desc
*) kmalloc(sizeof(*up
), GFP_KERNEL
);
1677 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1678 up
->args
.name
= name
;
1679 up
->args
.bitmask
= server
->attr_bitmask
;
1680 up
->res
.server
= server
;
1681 up
->res
.dir_attr
= &up
->dir_attr
;
1683 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1684 msg
->rpc_argp
= &up
->args
;
1685 msg
->rpc_resp
= &up
->res
;
1689 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1691 struct rpc_message
*msg
= &task
->tk_msg
;
1692 struct unlink_desc
*up
;
1694 if (msg
->rpc_resp
!= NULL
) {
1695 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1696 update_changeattr(dir
->d_inode
, &up
->res
.cinfo
);
1697 nfs_post_op_update_inode(dir
->d_inode
, up
->res
.dir_attr
);
1699 msg
->rpc_resp
= NULL
;
1700 msg
->rpc_argp
= NULL
;
1705 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1706 struct inode
*new_dir
, struct qstr
*new_name
)
1708 struct nfs_server
*server
= NFS_SERVER(old_dir
);
1709 struct nfs4_rename_arg arg
= {
1710 .old_dir
= NFS_FH(old_dir
),
1711 .new_dir
= NFS_FH(new_dir
),
1712 .old_name
= old_name
,
1713 .new_name
= new_name
,
1714 .bitmask
= server
->attr_bitmask
,
1716 struct nfs_fattr old_fattr
, new_fattr
;
1717 struct nfs4_rename_res res
= {
1719 .old_fattr
= &old_fattr
,
1720 .new_fattr
= &new_fattr
,
1722 struct rpc_message msg
= {
1723 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
1729 nfs_fattr_init(res
.old_fattr
);
1730 nfs_fattr_init(res
.new_fattr
);
1731 status
= rpc_call_sync(server
->client
, &msg
, 0);
1734 update_changeattr(old_dir
, &res
.old_cinfo
);
1735 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
1736 update_changeattr(new_dir
, &res
.new_cinfo
);
1737 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
1742 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1743 struct inode
*new_dir
, struct qstr
*new_name
)
1745 struct nfs4_exception exception
= { };
1748 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
1749 _nfs4_proc_rename(old_dir
, old_name
,
1752 } while (exception
.retry
);
1756 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1758 struct nfs_server
*server
= NFS_SERVER(inode
);
1759 struct nfs4_link_arg arg
= {
1760 .fh
= NFS_FH(inode
),
1761 .dir_fh
= NFS_FH(dir
),
1763 .bitmask
= server
->attr_bitmask
,
1765 struct nfs_fattr fattr
, dir_attr
;
1766 struct nfs4_link_res res
= {
1769 .dir_attr
= &dir_attr
,
1771 struct rpc_message msg
= {
1772 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
1778 nfs_fattr_init(res
.fattr
);
1779 nfs_fattr_init(res
.dir_attr
);
1780 status
= rpc_call_sync(server
->client
, &msg
, 0);
1782 update_changeattr(dir
, &res
.cinfo
);
1783 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1784 nfs_refresh_inode(inode
, res
.fattr
);
1790 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
1792 struct nfs4_exception exception
= { };
1795 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1796 _nfs4_proc_link(inode
, dir
, name
),
1798 } while (exception
.retry
);
1802 static int _nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1803 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1804 struct nfs_fattr
*fattr
)
1806 struct nfs_server
*server
= NFS_SERVER(dir
);
1807 struct nfs_fattr dir_fattr
;
1808 struct nfs4_create_arg arg
= {
1809 .dir_fh
= NFS_FH(dir
),
1814 .bitmask
= server
->attr_bitmask
,
1816 struct nfs4_create_res res
= {
1820 .dir_fattr
= &dir_fattr
,
1822 struct rpc_message msg
= {
1823 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
1829 if (path
->len
> NFS4_MAXPATHLEN
)
1830 return -ENAMETOOLONG
;
1831 arg
.u
.symlink
= path
;
1832 nfs_fattr_init(fattr
);
1833 nfs_fattr_init(&dir_fattr
);
1835 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1837 update_changeattr(dir
, &res
.dir_cinfo
);
1838 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
1842 static int nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
1843 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
1844 struct nfs_fattr
*fattr
)
1846 struct nfs4_exception exception
= { };
1849 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1850 _nfs4_proc_symlink(dir
, name
, path
, sattr
,
1853 } while (exception
.retry
);
1857 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1858 struct iattr
*sattr
)
1860 struct nfs_server
*server
= NFS_SERVER(dir
);
1861 struct nfs_fh fhandle
;
1862 struct nfs_fattr fattr
, dir_fattr
;
1863 struct nfs4_create_arg arg
= {
1864 .dir_fh
= NFS_FH(dir
),
1866 .name
= &dentry
->d_name
,
1869 .bitmask
= server
->attr_bitmask
,
1871 struct nfs4_create_res res
= {
1875 .dir_fattr
= &dir_fattr
,
1877 struct rpc_message msg
= {
1878 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1884 nfs_fattr_init(&fattr
);
1885 nfs_fattr_init(&dir_fattr
);
1887 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1889 update_changeattr(dir
, &res
.dir_cinfo
);
1890 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
1891 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
1896 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
1897 struct iattr
*sattr
)
1899 struct nfs4_exception exception
= { };
1902 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1903 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
1905 } while (exception
.retry
);
1909 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1910 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1912 struct inode
*dir
= dentry
->d_inode
;
1913 struct nfs4_readdir_arg args
= {
1918 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
1920 struct nfs4_readdir_res res
;
1921 struct rpc_message msg
= {
1922 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
1929 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
1930 dentry
->d_parent
->d_name
.name
,
1931 dentry
->d_name
.name
,
1932 (unsigned long long)cookie
);
1934 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
1935 res
.pgbase
= args
.pgbase
;
1936 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1938 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
1940 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
1944 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
1945 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
1947 struct nfs4_exception exception
= { };
1950 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
1951 _nfs4_proc_readdir(dentry
, cred
, cookie
,
1954 } while (exception
.retry
);
1958 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
1959 struct iattr
*sattr
, dev_t rdev
)
1961 struct nfs_server
*server
= NFS_SERVER(dir
);
1963 struct nfs_fattr fattr
, dir_fattr
;
1964 struct nfs4_create_arg arg
= {
1965 .dir_fh
= NFS_FH(dir
),
1967 .name
= &dentry
->d_name
,
1969 .bitmask
= server
->attr_bitmask
,
1971 struct nfs4_create_res res
= {
1975 .dir_fattr
= &dir_fattr
,
1977 struct rpc_message msg
= {
1978 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
1983 int mode
= sattr
->ia_mode
;
1985 nfs_fattr_init(&fattr
);
1986 nfs_fattr_init(&dir_fattr
);
1988 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
1989 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
1991 arg
.ftype
= NF4FIFO
;
1992 else if (S_ISBLK(mode
)) {
1994 arg
.u
.device
.specdata1
= MAJOR(rdev
);
1995 arg
.u
.device
.specdata2
= MINOR(rdev
);
1997 else if (S_ISCHR(mode
)) {
1999 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2000 arg
.u
.device
.specdata2
= MINOR(rdev
);
2003 arg
.ftype
= NF4SOCK
;
2005 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2007 update_changeattr(dir
, &res
.dir_cinfo
);
2008 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2009 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2014 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2015 struct iattr
*sattr
, dev_t rdev
)
2017 struct nfs4_exception exception
= { };
2020 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2021 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2023 } while (exception
.retry
);
2027 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2028 struct nfs_fsstat
*fsstat
)
2030 struct nfs4_statfs_arg args
= {
2032 .bitmask
= server
->attr_bitmask
,
2034 struct rpc_message msg
= {
2035 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2040 nfs_fattr_init(fsstat
->fattr
);
2041 return rpc_call_sync(server
->client
, &msg
, 0);
2044 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2046 struct nfs4_exception exception
= { };
2049 err
= nfs4_handle_exception(server
,
2050 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2052 } while (exception
.retry
);
2056 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2057 struct nfs_fsinfo
*fsinfo
)
2059 struct nfs4_fsinfo_arg args
= {
2061 .bitmask
= server
->attr_bitmask
,
2063 struct rpc_message msg
= {
2064 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2069 return rpc_call_sync(server
->client
, &msg
, 0);
2072 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2074 struct nfs4_exception exception
= { };
2078 err
= nfs4_handle_exception(server
,
2079 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2081 } while (exception
.retry
);
2085 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2087 nfs_fattr_init(fsinfo
->fattr
);
2088 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2091 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2092 struct nfs_pathconf
*pathconf
)
2094 struct nfs4_pathconf_arg args
= {
2096 .bitmask
= server
->attr_bitmask
,
2098 struct rpc_message msg
= {
2099 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2101 .rpc_resp
= pathconf
,
2104 /* None of the pathconf attributes are mandatory to implement */
2105 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2106 memset(pathconf
, 0, sizeof(*pathconf
));
2110 nfs_fattr_init(pathconf
->fattr
);
2111 return rpc_call_sync(server
->client
, &msg
, 0);
2114 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2115 struct nfs_pathconf
*pathconf
)
2117 struct nfs4_exception exception
= { };
2121 err
= nfs4_handle_exception(server
,
2122 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2124 } while (exception
.retry
);
2129 nfs4_read_done(struct rpc_task
*task
)
2131 struct nfs_read_data
*data
= (struct nfs_read_data
*) task
->tk_calldata
;
2132 struct inode
*inode
= data
->inode
;
2134 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2135 rpc_restart_call(task
);
2138 if (task
->tk_status
> 0)
2139 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2140 /* Call back common NFS readpage processing */
2141 nfs_readpage_result(task
);
2145 nfs4_proc_read_setup(struct nfs_read_data
*data
)
2147 struct rpc_task
*task
= &data
->task
;
2148 struct rpc_message msg
= {
2149 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2150 .rpc_argp
= &data
->args
,
2151 .rpc_resp
= &data
->res
,
2152 .rpc_cred
= data
->cred
,
2154 struct inode
*inode
= data
->inode
;
2157 data
->timestamp
= jiffies
;
2159 /* N.B. Do we need to test? Never called for swapfile inode */
2160 flags
= RPC_TASK_ASYNC
| (IS_SWAPFILE(inode
)? NFS_RPC_SWAPFLAGS
: 0);
2162 /* Finalize the task. */
2163 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_read_done
, flags
);
2164 rpc_call_setup(task
, &msg
, 0);
2168 nfs4_write_done(struct rpc_task
*task
)
2170 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2171 struct inode
*inode
= data
->inode
;
2173 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2174 rpc_restart_call(task
);
2177 if (task
->tk_status
>= 0) {
2178 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2179 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2181 /* Call back common NFS writeback processing */
2182 nfs_writeback_done(task
);
2186 nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2188 struct rpc_task
*task
= &data
->task
;
2189 struct rpc_message msg
= {
2190 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2191 .rpc_argp
= &data
->args
,
2192 .rpc_resp
= &data
->res
,
2193 .rpc_cred
= data
->cred
,
2195 struct inode
*inode
= data
->inode
;
2196 struct nfs_server
*server
= NFS_SERVER(inode
);
2200 if (how
& FLUSH_STABLE
) {
2201 if (!NFS_I(inode
)->ncommit
)
2202 stable
= NFS_FILE_SYNC
;
2204 stable
= NFS_DATA_SYNC
;
2206 stable
= NFS_UNSTABLE
;
2207 data
->args
.stable
= stable
;
2208 data
->args
.bitmask
= server
->attr_bitmask
;
2209 data
->res
.server
= server
;
2211 data
->timestamp
= jiffies
;
2213 /* Set the initial flags for the task. */
2214 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2216 /* Finalize the task. */
2217 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_write_done
, flags
);
2218 rpc_call_setup(task
, &msg
, 0);
2222 nfs4_commit_done(struct rpc_task
*task
)
2224 struct nfs_write_data
*data
= (struct nfs_write_data
*) task
->tk_calldata
;
2225 struct inode
*inode
= data
->inode
;
2227 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2228 rpc_restart_call(task
);
2231 if (task
->tk_status
>= 0)
2232 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2233 /* Call back common NFS writeback processing */
2234 nfs_commit_done(task
);
2238 nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2240 struct rpc_task
*task
= &data
->task
;
2241 struct rpc_message msg
= {
2242 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2243 .rpc_argp
= &data
->args
,
2244 .rpc_resp
= &data
->res
,
2245 .rpc_cred
= data
->cred
,
2247 struct inode
*inode
= data
->inode
;
2248 struct nfs_server
*server
= NFS_SERVER(inode
);
2251 data
->args
.bitmask
= server
->attr_bitmask
;
2252 data
->res
.server
= server
;
2254 /* Set the initial flags for the task. */
2255 flags
= (how
& FLUSH_SYNC
) ? 0 : RPC_TASK_ASYNC
;
2257 /* Finalize the task. */
2258 rpc_init_task(task
, NFS_CLIENT(inode
), nfs4_commit_done
, flags
);
2259 rpc_call_setup(task
, &msg
, 0);
2263 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2264 * standalone procedure for queueing an asynchronous RENEW.
2267 renew_done(struct rpc_task
*task
)
2269 struct nfs4_client
*clp
= (struct nfs4_client
*)task
->tk_msg
.rpc_argp
;
2270 unsigned long timestamp
= (unsigned long)task
->tk_calldata
;
2272 if (task
->tk_status
< 0) {
2273 switch (task
->tk_status
) {
2274 case -NFS4ERR_STALE_CLIENTID
:
2275 case -NFS4ERR_EXPIRED
:
2276 case -NFS4ERR_CB_PATH_DOWN
:
2277 nfs4_schedule_state_recovery(clp
);
2281 spin_lock(&clp
->cl_lock
);
2282 if (time_before(clp
->cl_last_renewal
,timestamp
))
2283 clp
->cl_last_renewal
= timestamp
;
2284 spin_unlock(&clp
->cl_lock
);
2288 nfs4_proc_async_renew(struct nfs4_client
*clp
)
2290 struct rpc_message msg
= {
2291 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2293 .rpc_cred
= clp
->cl_cred
,
2296 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2297 renew_done
, (void *)jiffies
);
2301 nfs4_proc_renew(struct nfs4_client
*clp
)
2303 struct rpc_message msg
= {
2304 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2306 .rpc_cred
= clp
->cl_cred
,
2308 unsigned long now
= jiffies
;
2311 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2314 spin_lock(&clp
->cl_lock
);
2315 if (time_before(clp
->cl_last_renewal
,now
))
2316 clp
->cl_last_renewal
= now
;
2317 spin_unlock(&clp
->cl_lock
);
2321 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2323 return (server
->caps
& NFS_CAP_ACLS
)
2324 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2325 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2328 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2329 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2332 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2334 static void buf_to_pages(const void *buf
, size_t buflen
,
2335 struct page
**pages
, unsigned int *pgbase
)
2337 const void *p
= buf
;
2339 *pgbase
= offset_in_page(buf
);
2341 while (p
< buf
+ buflen
) {
2342 *(pages
++) = virt_to_page(p
);
2343 p
+= PAGE_CACHE_SIZE
;
2347 struct nfs4_cached_acl
{
2353 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2355 struct nfs_inode
*nfsi
= NFS_I(inode
);
2357 spin_lock(&inode
->i_lock
);
2358 kfree(nfsi
->nfs4_acl
);
2359 nfsi
->nfs4_acl
= acl
;
2360 spin_unlock(&inode
->i_lock
);
2363 static void nfs4_zap_acl_attr(struct inode
*inode
)
2365 nfs4_set_cached_acl(inode
, NULL
);
2368 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2370 struct nfs_inode
*nfsi
= NFS_I(inode
);
2371 struct nfs4_cached_acl
*acl
;
2374 spin_lock(&inode
->i_lock
);
2375 acl
= nfsi
->nfs4_acl
;
2378 if (buf
== NULL
) /* user is just asking for length */
2380 if (acl
->cached
== 0)
2382 ret
= -ERANGE
; /* see getxattr(2) man page */
2383 if (acl
->len
> buflen
)
2385 memcpy(buf
, acl
->data
, acl
->len
);
2389 spin_unlock(&inode
->i_lock
);
2393 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2395 struct nfs4_cached_acl
*acl
;
2397 if (buf
&& acl_len
<= PAGE_SIZE
) {
2398 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2402 memcpy(acl
->data
, buf
, acl_len
);
2404 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2411 nfs4_set_cached_acl(inode
, acl
);
2414 static inline ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2416 struct page
*pages
[NFS4ACL_MAXPAGES
];
2417 struct nfs_getaclargs args
= {
2418 .fh
= NFS_FH(inode
),
2422 size_t resp_len
= buflen
;
2424 struct rpc_message msg
= {
2425 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2427 .rpc_resp
= &resp_len
,
2429 struct page
*localpage
= NULL
;
2432 if (buflen
< PAGE_SIZE
) {
2433 /* As long as we're doing a round trip to the server anyway,
2434 * let's be prepared for a page of acl data. */
2435 localpage
= alloc_page(GFP_KERNEL
);
2436 resp_buf
= page_address(localpage
);
2437 if (localpage
== NULL
)
2439 args
.acl_pages
[0] = localpage
;
2440 args
.acl_pgbase
= 0;
2441 resp_len
= args
.acl_len
= PAGE_SIZE
;
2444 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2446 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2449 if (resp_len
> args
.acl_len
)
2450 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2452 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2455 if (resp_len
> buflen
)
2458 memcpy(buf
, resp_buf
, resp_len
);
2463 __free_page(localpage
);
2467 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2469 struct nfs_server
*server
= NFS_SERVER(inode
);
2472 if (!nfs4_server_supports_acls(server
))
2474 ret
= nfs_revalidate_inode(server
, inode
);
2477 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2480 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2483 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2485 struct nfs_server
*server
= NFS_SERVER(inode
);
2486 struct page
*pages
[NFS4ACL_MAXPAGES
];
2487 struct nfs_setaclargs arg
= {
2488 .fh
= NFS_FH(inode
),
2492 struct rpc_message msg
= {
2493 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2499 if (!nfs4_server_supports_acls(server
))
2501 nfs_inode_return_delegation(inode
);
2502 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2503 ret
= rpc_call_sync(NFS_SERVER(inode
)->client
, &msg
, 0);
2505 nfs4_write_cached_acl(inode
, buf
, buflen
);
2510 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2512 struct nfs4_client
*clp
= server
->nfs4_state
;
2514 if (!clp
|| task
->tk_status
>= 0)
2516 switch(task
->tk_status
) {
2517 case -NFS4ERR_STALE_CLIENTID
:
2518 case -NFS4ERR_STALE_STATEID
:
2519 case -NFS4ERR_EXPIRED
:
2520 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2521 nfs4_schedule_state_recovery(clp
);
2522 if (test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2523 rpc_wake_up_task(task
);
2524 task
->tk_status
= 0;
2526 case -NFS4ERR_GRACE
:
2527 case -NFS4ERR_DELAY
:
2528 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2529 task
->tk_status
= 0;
2531 case -NFS4ERR_OLD_STATEID
:
2532 task
->tk_status
= 0;
2535 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2539 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs4_client
*clp
)
2543 int interruptible
, res
= 0;
2547 rpc_clnt_sigmask(clnt
, &oldset
);
2548 interruptible
= TASK_UNINTERRUPTIBLE
;
2550 interruptible
= TASK_INTERRUPTIBLE
;
2551 prepare_to_wait(&clp
->cl_waitq
, &wait
, interruptible
);
2552 nfs4_schedule_state_recovery(clp
);
2553 if (clnt
->cl_intr
&& signalled())
2555 else if (!test_bit(NFS4CLNT_OK
, &clp
->cl_state
))
2557 finish_wait(&clp
->cl_waitq
, &wait
);
2558 rpc_clnt_sigunmask(clnt
, &oldset
);
2562 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2570 *timeout
= NFS4_POLL_RETRY_MIN
;
2571 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2572 *timeout
= NFS4_POLL_RETRY_MAX
;
2573 rpc_clnt_sigmask(clnt
, &oldset
);
2574 if (clnt
->cl_intr
) {
2575 schedule_timeout_interruptible(*timeout
);
2579 schedule_timeout_uninterruptible(*timeout
);
2580 rpc_clnt_sigunmask(clnt
, &oldset
);
2585 /* This is the error handling routine for processes that are allowed
2588 int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2590 struct nfs4_client
*clp
= server
->nfs4_state
;
2591 int ret
= errorcode
;
2593 exception
->retry
= 0;
2597 case -NFS4ERR_STALE_CLIENTID
:
2598 case -NFS4ERR_STALE_STATEID
:
2599 case -NFS4ERR_EXPIRED
:
2600 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2602 exception
->retry
= 1;
2604 case -NFS4ERR_GRACE
:
2605 case -NFS4ERR_DELAY
:
2606 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2609 case -NFS4ERR_OLD_STATEID
:
2610 exception
->retry
= 1;
2612 /* We failed to handle the error */
2613 return nfs4_map_errors(ret
);
2616 int nfs4_proc_setclientid(struct nfs4_client
*clp
, u32 program
, unsigned short port
)
2618 nfs4_verifier sc_verifier
;
2619 struct nfs4_setclientid setclientid
= {
2620 .sc_verifier
= &sc_verifier
,
2623 struct rpc_message msg
= {
2624 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2625 .rpc_argp
= &setclientid
,
2627 .rpc_cred
= clp
->cl_cred
,
2633 p
= (u32
*)sc_verifier
.data
;
2634 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2635 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2638 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2639 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2640 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.s_addr
),
2641 clp
->cl_cred
->cr_ops
->cr_name
,
2642 clp
->cl_id_uniquifier
);
2643 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2644 sizeof(setclientid
.sc_netid
), "tcp");
2645 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2646 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2647 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2649 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2650 if (status
!= -NFS4ERR_CLID_INUSE
)
2655 ssleep(clp
->cl_lease_time
+ 1);
2657 if (++clp
->cl_id_uniquifier
== 0)
2664 nfs4_proc_setclientid_confirm(struct nfs4_client
*clp
)
2666 struct nfs_fsinfo fsinfo
;
2667 struct rpc_message msg
= {
2668 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2670 .rpc_resp
= &fsinfo
,
2671 .rpc_cred
= clp
->cl_cred
,
2677 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2679 spin_lock(&clp
->cl_lock
);
2680 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2681 clp
->cl_last_renewal
= now
;
2682 spin_unlock(&clp
->cl_lock
);
2687 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2689 struct nfs4_delegreturnargs args
= {
2690 .fhandle
= NFS_FH(inode
),
2693 struct rpc_message msg
= {
2694 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
2699 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2702 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
2704 struct nfs_server
*server
= NFS_SERVER(inode
);
2705 struct nfs4_exception exception
= { };
2708 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
2710 case -NFS4ERR_STALE_STATEID
:
2711 case -NFS4ERR_EXPIRED
:
2712 nfs4_schedule_state_recovery(server
->nfs4_state
);
2716 err
= nfs4_handle_exception(server
, err
, &exception
);
2717 } while (exception
.retry
);
2721 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2722 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2725 * sleep, with exponential backoff, and retry the LOCK operation.
2727 static unsigned long
2728 nfs4_set_lock_task_retry(unsigned long timeout
)
2730 schedule_timeout_interruptible(timeout
);
2732 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
2733 return NFS4_LOCK_MAXTIMEOUT
;
2738 nfs4_lck_type(int cmd
, struct file_lock
*request
)
2741 switch (request
->fl_type
) {
2743 return IS_SETLKW(cmd
) ? NFS4_READW_LT
: NFS4_READ_LT
;
2745 return IS_SETLKW(cmd
) ? NFS4_WRITEW_LT
: NFS4_WRITE_LT
;
2747 return NFS4_WRITE_LT
;
2753 static inline uint64_t
2754 nfs4_lck_length(struct file_lock
*request
)
2756 if (request
->fl_end
== OFFSET_MAX
)
2757 return ~(uint64_t)0;
2758 return request
->fl_end
- request
->fl_start
+ 1;
2761 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2763 struct inode
*inode
= state
->inode
;
2764 struct nfs_server
*server
= NFS_SERVER(inode
);
2765 struct nfs4_client
*clp
= server
->nfs4_state
;
2766 struct nfs_lockargs arg
= {
2767 .fh
= NFS_FH(inode
),
2768 .type
= nfs4_lck_type(cmd
, request
),
2769 .offset
= request
->fl_start
,
2770 .length
= nfs4_lck_length(request
),
2772 struct nfs_lockres res
= {
2775 struct rpc_message msg
= {
2776 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
2779 .rpc_cred
= state
->owner
->so_cred
,
2781 struct nfs_lowner nlo
;
2782 struct nfs4_lock_state
*lsp
;
2785 down_read(&clp
->cl_sem
);
2786 nlo
.clientid
= clp
->cl_clientid
;
2787 status
= nfs4_set_lock_state(state
, request
);
2790 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2791 nlo
.id
= lsp
->ls_id
;
2793 status
= rpc_call_sync(server
->client
, &msg
, 0);
2795 request
->fl_type
= F_UNLCK
;
2796 } else if (status
== -NFS4ERR_DENIED
) {
2797 int64_t len
, start
, end
;
2798 start
= res
.u
.denied
.offset
;
2799 len
= res
.u
.denied
.length
;
2800 end
= start
+ len
- 1;
2801 if (end
< 0 || len
== 0)
2802 request
->fl_end
= OFFSET_MAX
;
2804 request
->fl_end
= (loff_t
)end
;
2805 request
->fl_start
= (loff_t
)start
;
2806 request
->fl_type
= F_WRLCK
;
2807 if (res
.u
.denied
.type
& 1)
2808 request
->fl_type
= F_RDLCK
;
2809 request
->fl_pid
= 0;
2813 up_read(&clp
->cl_sem
);
2817 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2819 struct nfs4_exception exception
= { };
2823 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
2824 _nfs4_proc_getlk(state
, cmd
, request
),
2826 } while (exception
.retry
);
2830 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
2833 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
2835 res
= posix_lock_file_wait(file
, fl
);
2838 res
= flock_lock_file_wait(file
, fl
);
2844 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n",
2849 struct nfs4_unlockdata
{
2850 struct nfs_lockargs arg
;
2851 struct nfs_locku_opargs luargs
;
2852 struct nfs_lockres res
;
2853 struct nfs4_lock_state
*lsp
;
2854 struct nfs_open_context
*ctx
;
2856 struct completion completion
;
2859 static void nfs4_locku_release_calldata(struct nfs4_unlockdata
*calldata
)
2861 if (atomic_dec_and_test(&calldata
->refcount
)) {
2862 nfs_free_seqid(calldata
->luargs
.seqid
);
2863 nfs4_put_lock_state(calldata
->lsp
);
2864 put_nfs_open_context(calldata
->ctx
);
2869 static void nfs4_locku_complete(struct nfs4_unlockdata
*calldata
)
2871 complete(&calldata
->completion
);
2872 nfs4_locku_release_calldata(calldata
);
2875 static void nfs4_locku_done(struct rpc_task
*task
)
2877 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2879 nfs_increment_lock_seqid(task
->tk_status
, calldata
->luargs
.seqid
);
2880 switch (task
->tk_status
) {
2882 memcpy(calldata
->lsp
->ls_stateid
.data
,
2883 calldata
->res
.u
.stateid
.data
,
2884 sizeof(calldata
->lsp
->ls_stateid
.data
));
2886 case -NFS4ERR_STALE_STATEID
:
2887 case -NFS4ERR_EXPIRED
:
2888 nfs4_schedule_state_recovery(calldata
->res
.server
->nfs4_state
);
2891 if (nfs4_async_handle_error(task
, calldata
->res
.server
) == -EAGAIN
) {
2892 rpc_restart_call(task
);
2896 nfs4_locku_complete(calldata
);
2899 static void nfs4_locku_begin(struct rpc_task
*task
)
2901 struct nfs4_unlockdata
*calldata
= (struct nfs4_unlockdata
*)task
->tk_calldata
;
2902 struct rpc_message msg
= {
2903 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
2904 .rpc_argp
= &calldata
->arg
,
2905 .rpc_resp
= &calldata
->res
,
2906 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
2910 status
= nfs_wait_on_sequence(calldata
->luargs
.seqid
, task
);
2913 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
2914 nfs4_locku_complete(calldata
);
2915 task
->tk_exit
= NULL
;
2919 rpc_call_setup(task
, &msg
, 0);
2922 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
2924 struct nfs4_unlockdata
*calldata
;
2925 struct inode
*inode
= state
->inode
;
2926 struct nfs_server
*server
= NFS_SERVER(inode
);
2927 struct nfs4_lock_state
*lsp
;
2930 /* Is this a delegated lock? */
2931 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
2932 return do_vfs_lock(request
->fl_file
, request
);
2934 status
= nfs4_set_lock_state(state
, request
);
2937 lsp
= request
->fl_u
.nfs4_fl
.owner
;
2938 /* We might have lost the locks! */
2939 if ((lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0)
2941 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
2942 if (calldata
== NULL
)
2944 calldata
->luargs
.seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
2945 if (calldata
->luargs
.seqid
== NULL
) {
2949 calldata
->luargs
.stateid
= &lsp
->ls_stateid
;
2950 calldata
->arg
.fh
= NFS_FH(inode
);
2951 calldata
->arg
.type
= nfs4_lck_type(cmd
, request
);
2952 calldata
->arg
.offset
= request
->fl_start
;
2953 calldata
->arg
.length
= nfs4_lck_length(request
);
2954 calldata
->arg
.u
.locku
= &calldata
->luargs
;
2955 calldata
->res
.server
= server
;
2956 calldata
->lsp
= lsp
;
2957 atomic_inc(&lsp
->ls_count
);
2959 /* Ensure we don't close file until we're done freeing locks! */
2960 calldata
->ctx
= get_nfs_open_context((struct nfs_open_context
*)request
->fl_file
->private_data
);
2962 atomic_set(&calldata
->refcount
, 2);
2963 init_completion(&calldata
->completion
);
2965 status
= nfs4_call_async(NFS_SERVER(inode
)->client
, nfs4_locku_begin
,
2966 nfs4_locku_done
, calldata
);
2968 wait_for_completion_interruptible(&calldata
->completion
);
2969 do_vfs_lock(request
->fl_file
, request
);
2970 nfs4_locku_release_calldata(calldata
);
2974 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
, int reclaim
)
2976 struct inode
*inode
= state
->inode
;
2977 struct nfs_server
*server
= NFS_SERVER(inode
);
2978 struct nfs4_lock_state
*lsp
= request
->fl_u
.nfs4_fl
.owner
;
2979 struct nfs_lock_opargs largs
= {
2980 .lock_stateid
= &lsp
->ls_stateid
,
2981 .open_stateid
= &state
->stateid
,
2983 .clientid
= server
->nfs4_state
->cl_clientid
,
2988 struct nfs_lockargs arg
= {
2989 .fh
= NFS_FH(inode
),
2990 .type
= nfs4_lck_type(cmd
, request
),
2991 .offset
= request
->fl_start
,
2992 .length
= nfs4_lck_length(request
),
2997 struct nfs_lockres res
= {
3000 struct rpc_message msg
= {
3001 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3004 .rpc_cred
= state
->owner
->so_cred
,
3006 int status
= -ENOMEM
;
3008 largs
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3009 if (largs
.lock_seqid
== NULL
)
3011 if (!(lsp
->ls_seqid
.flags
& NFS_SEQID_CONFIRMED
)) {
3012 struct nfs4_state_owner
*owner
= state
->owner
;
3014 largs
.open_seqid
= nfs_alloc_seqid(&owner
->so_seqid
);
3015 if (largs
.open_seqid
== NULL
)
3017 largs
.new_lock_owner
= 1;
3018 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
3019 /* increment open seqid on success, and seqid mutating errors */
3020 if (largs
.new_lock_owner
!= 0) {
3021 nfs_increment_open_seqid(status
, largs
.open_seqid
);
3023 nfs_confirm_seqid(&lsp
->ls_seqid
, 0);
3025 nfs_free_seqid(largs
.open_seqid
);
3027 status
= rpc_call_sync(server
->client
, &msg
, RPC_TASK_NOINTR
);
3028 /* increment lock seqid on success, and seqid mutating errors*/
3029 nfs_increment_lock_seqid(status
, largs
.lock_seqid
);
3030 /* save the returned stateid. */
3032 memcpy(lsp
->ls_stateid
.data
, res
.u
.stateid
.data
,
3033 sizeof(lsp
->ls_stateid
.data
));
3034 lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3035 } else if (status
== -NFS4ERR_DENIED
)
3038 nfs_free_seqid(largs
.lock_seqid
);
3042 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3044 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3045 struct nfs4_exception exception
= { };
3048 /* Cache the lock if possible... */
3049 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3052 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3053 if (err
!= -NFS4ERR_DELAY
)
3055 nfs4_handle_exception(server
, err
, &exception
);
3056 } while (exception
.retry
);
3060 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3062 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3063 struct nfs4_exception exception
= { };
3066 err
= nfs4_set_lock_state(state
, request
);
3070 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3071 if (err
!= -NFS4ERR_DELAY
)
3073 nfs4_handle_exception(server
, err
, &exception
);
3074 } while (exception
.retry
);
3078 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3080 struct nfs4_client
*clp
= state
->owner
->so_client
;
3083 /* Is this a delegated open? */
3084 if (NFS_I(state
->inode
)->delegation_state
!= 0) {
3085 /* Yes: cache locks! */
3086 status
= do_vfs_lock(request
->fl_file
, request
);
3087 /* ...but avoid races with delegation recall... */
3088 if (status
< 0 || test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3091 down_read(&clp
->cl_sem
);
3092 status
= nfs4_set_lock_state(state
, request
);
3095 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3098 /* Note: we always want to sleep here! */
3099 request
->fl_flags
|= FL_SLEEP
;
3100 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3101 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3103 up_read(&clp
->cl_sem
);
3107 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3109 struct nfs4_exception exception
= { };
3113 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3114 _nfs4_proc_setlk(state
, cmd
, request
),
3116 } while (exception
.retry
);
3121 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3123 struct nfs_open_context
*ctx
;
3124 struct nfs4_state
*state
;
3125 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3128 /* verify open state */
3129 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3132 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3136 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3138 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3141 if (request
->fl_type
== F_UNLCK
)
3142 return nfs4_proc_unlck(state
, cmd
, request
);
3145 status
= nfs4_proc_setlk(state
, cmd
, request
);
3146 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3148 timeout
= nfs4_set_lock_task_retry(timeout
);
3149 status
= -ERESTARTSYS
;
3152 } while(status
< 0);
3156 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3158 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3159 struct nfs4_exception exception
= { };
3162 err
= nfs4_set_lock_state(state
, fl
);
3166 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3167 if (err
!= -NFS4ERR_DELAY
)
3169 err
= nfs4_handle_exception(server
, err
, &exception
);
3170 } while (exception
.retry
);
3175 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3177 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3178 size_t buflen
, int flags
)
3180 struct inode
*inode
= dentry
->d_inode
;
3182 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3185 if (!S_ISREG(inode
->i_mode
) &&
3186 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3189 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3192 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3193 * and that's what we'll do for e.g. user attributes that haven't been set.
3194 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3195 * attributes in kernel-managed attribute namespaces. */
3196 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3199 struct inode
*inode
= dentry
->d_inode
;
3201 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3204 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3207 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3209 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3211 if (buf
&& buflen
< len
)
3214 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3218 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3219 .recover_open
= nfs4_open_reclaim
,
3220 .recover_lock
= nfs4_lock_reclaim
,
3223 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3224 .recover_open
= nfs4_open_expired
,
3225 .recover_lock
= nfs4_lock_expired
,
3228 static struct inode_operations nfs4_file_inode_operations
= {
3229 .permission
= nfs_permission
,
3230 .getattr
= nfs_getattr
,
3231 .setattr
= nfs_setattr
,
3232 .getxattr
= nfs4_getxattr
,
3233 .setxattr
= nfs4_setxattr
,
3234 .listxattr
= nfs4_listxattr
,
3237 struct nfs_rpc_ops nfs_v4_clientops
= {
3238 .version
= 4, /* protocol version */
3239 .dentry_ops
= &nfs4_dentry_operations
,
3240 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3241 .file_inode_ops
= &nfs4_file_inode_operations
,
3242 .getroot
= nfs4_proc_get_root
,
3243 .getattr
= nfs4_proc_getattr
,
3244 .setattr
= nfs4_proc_setattr
,
3245 .lookup
= nfs4_proc_lookup
,
3246 .access
= nfs4_proc_access
,
3247 .readlink
= nfs4_proc_readlink
,
3248 .read
= nfs4_proc_read
,
3249 .write
= nfs4_proc_write
,
3250 .commit
= nfs4_proc_commit
,
3251 .create
= nfs4_proc_create
,
3252 .remove
= nfs4_proc_remove
,
3253 .unlink_setup
= nfs4_proc_unlink_setup
,
3254 .unlink_done
= nfs4_proc_unlink_done
,
3255 .rename
= nfs4_proc_rename
,
3256 .link
= nfs4_proc_link
,
3257 .symlink
= nfs4_proc_symlink
,
3258 .mkdir
= nfs4_proc_mkdir
,
3259 .rmdir
= nfs4_proc_remove
,
3260 .readdir
= nfs4_proc_readdir
,
3261 .mknod
= nfs4_proc_mknod
,
3262 .statfs
= nfs4_proc_statfs
,
3263 .fsinfo
= nfs4_proc_fsinfo
,
3264 .pathconf
= nfs4_proc_pathconf
,
3265 .decode_dirent
= nfs4_decode_dirent
,
3266 .read_setup
= nfs4_proc_read_setup
,
3267 .write_setup
= nfs4_proc_write_setup
,
3268 .commit_setup
= nfs4_proc_commit_setup
,
3269 .file_open
= nfs_open
,
3270 .file_release
= nfs_release
,
3271 .lock
= nfs4_proc_lock
,
3272 .clear_acl_cache
= nfs4_zap_acl_attr
,