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"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (1*HZ)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
63 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
64 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*);
65 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
);
66 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
);
67 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
);
69 /* Prevent leaks of NFSv4 errors into userland */
70 int nfs4_map_errors(int err
)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap
[2] = {
88 | FATTR4_WORD0_FILEID
,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap
[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL
,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap
[2] = {
111 | FATTR4_WORD0_MAXNAME
,
115 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME
,
122 const u32 nfs4_fs_locations_bitmap
[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS
,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie
, u32
*verifier
, struct dentry
*dentry
,
142 struct nfs4_readdir_arg
*readdir
)
146 BUG_ON(readdir
->count
< 80);
148 readdir
->cookie
= cookie
;
149 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
154 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start
= p
= (u32
*)kmap_atomic(*readdir
->pages
, KM_USER0
);
168 *p
++ = xdr_one
; /* next */
169 *p
++ = xdr_zero
; /* cookie, first word */
170 *p
++ = xdr_one
; /* cookie, second word */
171 *p
++ = xdr_one
; /* entry len */
172 memcpy(p
, ".\0\0\0", 4); /* entry */
174 *p
++ = xdr_one
; /* bitmap length */
175 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
176 *p
++ = htonl(8); /* attribute buffer length */
177 p
= xdr_encode_hyper(p
, dentry
->d_inode
->i_ino
);
180 *p
++ = xdr_one
; /* next */
181 *p
++ = xdr_zero
; /* cookie, first word */
182 *p
++ = xdr_two
; /* cookie, second word */
183 *p
++ = xdr_two
; /* entry len */
184 memcpy(p
, "..\0\0", 4); /* entry */
186 *p
++ = xdr_one
; /* bitmap length */
187 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
188 *p
++ = htonl(8); /* attribute buffer length */
189 p
= xdr_encode_hyper(p
, dentry
->d_parent
->d_inode
->i_ino
);
191 readdir
->pgbase
= (char *)p
- (char *)start
;
192 readdir
->count
-= readdir
->pgbase
;
193 kunmap_atomic(start
, KM_USER0
);
196 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
198 struct nfs_client
*clp
= server
->nfs_client
;
199 spin_lock(&clp
->cl_lock
);
200 if (time_before(clp
->cl_last_renewal
,timestamp
))
201 clp
->cl_last_renewal
= timestamp
;
202 spin_unlock(&clp
->cl_lock
);
205 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
207 struct nfs_inode
*nfsi
= NFS_I(dir
);
209 spin_lock(&dir
->i_lock
);
210 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
211 if (cinfo
->before
== nfsi
->change_attr
&& cinfo
->atomic
)
212 nfsi
->change_attr
= cinfo
->after
;
213 spin_unlock(&dir
->i_lock
);
216 struct nfs4_opendata
{
218 struct nfs_openargs o_arg
;
219 struct nfs_openres o_res
;
220 struct nfs_open_confirmargs c_arg
;
221 struct nfs_open_confirmres c_res
;
222 struct nfs_fattr f_attr
;
223 struct nfs_fattr dir_attr
;
224 struct dentry
*dentry
;
226 struct nfs4_state_owner
*owner
;
228 unsigned long timestamp
;
233 static struct nfs4_opendata
*nfs4_opendata_alloc(struct dentry
*dentry
,
234 struct nfs4_state_owner
*sp
, int flags
,
235 const struct iattr
*attrs
)
237 struct dentry
*parent
= dget_parent(dentry
);
238 struct inode
*dir
= parent
->d_inode
;
239 struct nfs_server
*server
= NFS_SERVER(dir
);
240 struct nfs4_opendata
*p
;
242 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
245 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
246 if (p
->o_arg
.seqid
== NULL
)
248 atomic_set(&p
->count
, 1);
249 p
->dentry
= dget(dentry
);
252 atomic_inc(&sp
->so_count
);
253 p
->o_arg
.fh
= NFS_FH(dir
);
254 p
->o_arg
.open_flags
= flags
,
255 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
256 p
->o_arg
.id
= sp
->so_id
;
257 p
->o_arg
.name
= &dentry
->d_name
;
258 p
->o_arg
.server
= server
;
259 p
->o_arg
.bitmask
= server
->attr_bitmask
;
260 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
261 p
->o_res
.f_attr
= &p
->f_attr
;
262 p
->o_res
.dir_attr
= &p
->dir_attr
;
263 p
->o_res
.server
= server
;
264 nfs_fattr_init(&p
->f_attr
);
265 nfs_fattr_init(&p
->dir_attr
);
266 if (flags
& O_EXCL
) {
267 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
270 } else if (flags
& O_CREAT
) {
271 p
->o_arg
.u
.attrs
= &p
->attrs
;
272 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
274 p
->c_arg
.fh
= &p
->o_res
.fh
;
275 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
276 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
285 static void nfs4_opendata_free(struct nfs4_opendata
*p
)
287 if (p
!= NULL
&& atomic_dec_and_test(&p
->count
)) {
288 nfs_free_seqid(p
->o_arg
.seqid
);
289 nfs4_put_state_owner(p
->owner
);
296 /* Helper for asynchronous RPC calls */
297 static int nfs4_call_async(struct rpc_clnt
*clnt
,
298 const struct rpc_call_ops
*tk_ops
, void *calldata
)
300 struct rpc_task
*task
;
302 if (!(task
= rpc_new_task(clnt
, RPC_TASK_ASYNC
, tk_ops
, calldata
)))
308 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
313 rpc_clnt_sigmask(task
->tk_client
, &oldset
);
314 ret
= rpc_wait_for_completion_task(task
);
315 rpc_clnt_sigunmask(task
->tk_client
, &oldset
);
319 static inline void update_open_stateflags(struct nfs4_state
*state
, mode_t open_flags
)
321 switch (open_flags
) {
328 case FMODE_READ
|FMODE_WRITE
:
333 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
335 struct inode
*inode
= state
->inode
;
337 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
338 /* Protect against nfs4_find_state_byowner() */
339 spin_lock(&state
->owner
->so_lock
);
340 spin_lock(&inode
->i_lock
);
341 memcpy(&state
->stateid
, stateid
, sizeof(state
->stateid
));
342 update_open_stateflags(state
, open_flags
);
343 nfs4_state_set_mode_locked(state
, state
->state
| open_flags
);
344 spin_unlock(&inode
->i_lock
);
345 spin_unlock(&state
->owner
->so_lock
);
348 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
351 struct nfs4_state
*state
= NULL
;
353 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
355 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
358 state
= nfs4_get_open_state(inode
, data
->owner
);
361 update_open_stateid(state
, &data
->o_res
.stateid
, data
->o_arg
.open_flags
);
368 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
370 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
371 struct nfs_open_context
*ctx
;
373 spin_lock(&state
->inode
->i_lock
);
374 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
375 if (ctx
->state
!= state
)
377 get_nfs_open_context(ctx
);
378 spin_unlock(&state
->inode
->i_lock
);
381 spin_unlock(&state
->inode
->i_lock
);
382 return ERR_PTR(-ENOENT
);
385 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, nfs4_stateid
*stateid
)
389 opendata
->o_arg
.open_flags
= openflags
;
390 ret
= _nfs4_proc_open(opendata
);
393 memcpy(stateid
->data
, opendata
->o_res
.stateid
.data
,
394 sizeof(stateid
->data
));
398 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
400 nfs4_stateid stateid
;
401 struct nfs4_state
*newstate
;
406 /* memory barrier prior to reading state->n_* */
408 if (state
->n_rdwr
!= 0) {
409 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &stateid
);
412 mode
|= FMODE_READ
|FMODE_WRITE
;
413 if (opendata
->o_res
.delegation_type
!= 0)
414 delegation
= opendata
->o_res
.delegation_type
;
417 if (state
->n_wronly
!= 0) {
418 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &stateid
);
422 if (opendata
->o_res
.delegation_type
!= 0)
423 delegation
= opendata
->o_res
.delegation_type
;
426 if (state
->n_rdonly
!= 0) {
427 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &stateid
);
432 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
435 if (opendata
->o_res
.delegation_type
== 0)
436 opendata
->o_res
.delegation_type
= delegation
;
437 opendata
->o_arg
.open_flags
|= mode
;
438 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
439 if (newstate
!= NULL
) {
440 if (opendata
->o_res
.delegation_type
!= 0) {
441 struct nfs_inode
*nfsi
= NFS_I(newstate
->inode
);
442 int delegation_flags
= 0;
443 if (nfsi
->delegation
)
444 delegation_flags
= nfsi
->delegation
->flags
;
445 if (!(delegation_flags
& NFS_DELEGATION_NEED_RECLAIM
))
446 nfs_inode_set_delegation(newstate
->inode
,
447 opendata
->owner
->so_cred
,
450 nfs_inode_reclaim_delegation(newstate
->inode
,
451 opendata
->owner
->so_cred
,
454 nfs4_close_state(newstate
, opendata
->o_arg
.open_flags
);
456 if (newstate
!= state
)
463 * reclaim state on the server after a reboot.
465 static int _nfs4_do_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
467 struct nfs_delegation
*delegation
= NFS_I(state
->inode
)->delegation
;
468 struct nfs4_opendata
*opendata
;
469 int delegation_type
= 0;
472 if (delegation
!= NULL
) {
473 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
474 memcpy(&state
->stateid
, &delegation
->stateid
,
475 sizeof(state
->stateid
));
476 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
479 delegation_type
= delegation
->type
;
481 opendata
= nfs4_opendata_alloc(dentry
, sp
, 0, NULL
);
482 if (opendata
== NULL
)
484 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
485 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
486 nfs_copy_fh(&opendata
->o_res
.fh
, opendata
->o_arg
.fh
);
487 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
488 status
= nfs4_open_recover(opendata
, state
);
489 nfs4_opendata_free(opendata
);
493 static int nfs4_do_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
495 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
496 struct nfs4_exception exception
= { };
499 err
= _nfs4_do_open_reclaim(sp
, state
, dentry
);
500 if (err
!= -NFS4ERR_DELAY
)
502 nfs4_handle_exception(server
, err
, &exception
);
503 } while (exception
.retry
);
507 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
509 struct nfs_open_context
*ctx
;
512 ctx
= nfs4_state_find_open_context(state
);
515 ret
= nfs4_do_open_reclaim(sp
, state
, ctx
->dentry
);
516 put_nfs_open_context(ctx
);
520 static int _nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
522 struct nfs4_state_owner
*sp
= state
->owner
;
523 struct nfs4_opendata
*opendata
;
526 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
528 opendata
= nfs4_opendata_alloc(dentry
, sp
, 0, NULL
);
529 if (opendata
== NULL
)
531 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
532 memcpy(opendata
->o_arg
.u
.delegation
.data
, state
->stateid
.data
,
533 sizeof(opendata
->o_arg
.u
.delegation
.data
));
534 ret
= nfs4_open_recover(opendata
, state
);
535 nfs4_opendata_free(opendata
);
539 int nfs4_open_delegation_recall(struct dentry
*dentry
, struct nfs4_state
*state
)
541 struct nfs4_exception exception
= { };
542 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
545 err
= _nfs4_open_delegation_recall(dentry
, state
);
549 case -NFS4ERR_STALE_CLIENTID
:
550 case -NFS4ERR_STALE_STATEID
:
551 case -NFS4ERR_EXPIRED
:
552 /* Don't recall a delegation if it was lost */
553 nfs4_schedule_state_recovery(server
->nfs_client
);
556 err
= nfs4_handle_exception(server
, err
, &exception
);
557 } while (exception
.retry
);
561 static void nfs4_open_confirm_prepare(struct rpc_task
*task
, void *calldata
)
563 struct nfs4_opendata
*data
= calldata
;
564 struct rpc_message msg
= {
565 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
566 .rpc_argp
= &data
->c_arg
,
567 .rpc_resp
= &data
->c_res
,
568 .rpc_cred
= data
->owner
->so_cred
,
570 data
->timestamp
= jiffies
;
571 rpc_call_setup(task
, &msg
, 0);
574 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
576 struct nfs4_opendata
*data
= calldata
;
578 data
->rpc_status
= task
->tk_status
;
579 if (RPC_ASSASSINATED(task
))
581 if (data
->rpc_status
== 0) {
582 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
583 sizeof(data
->o_res
.stateid
.data
));
584 renew_lease(data
->o_res
.server
, data
->timestamp
);
586 nfs_increment_open_seqid(data
->rpc_status
, data
->c_arg
.seqid
);
587 nfs_confirm_seqid(&data
->owner
->so_seqid
, data
->rpc_status
);
590 static void nfs4_open_confirm_release(void *calldata
)
592 struct nfs4_opendata
*data
= calldata
;
593 struct nfs4_state
*state
= NULL
;
595 /* If this request hasn't been cancelled, do nothing */
596 if (data
->cancelled
== 0)
598 /* In case of error, no cleanup! */
599 if (data
->rpc_status
!= 0)
601 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
602 state
= nfs4_opendata_to_nfs4_state(data
);
604 nfs4_close_state(state
, data
->o_arg
.open_flags
);
606 nfs4_opendata_free(data
);
609 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
610 .rpc_call_prepare
= nfs4_open_confirm_prepare
,
611 .rpc_call_done
= nfs4_open_confirm_done
,
612 .rpc_release
= nfs4_open_confirm_release
,
616 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
618 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
620 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
621 struct rpc_task
*task
;
624 atomic_inc(&data
->count
);
626 * If rpc_run_task() ends up calling ->rpc_release(), we
627 * want to ensure that it takes the 'error' code path.
629 data
->rpc_status
= -ENOMEM
;
630 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_confirm_ops
, data
);
632 return PTR_ERR(task
);
633 status
= nfs4_wait_for_completion_rpc_task(task
);
638 status
= data
->rpc_status
;
639 rpc_release_task(task
);
643 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
645 struct nfs4_opendata
*data
= calldata
;
646 struct nfs4_state_owner
*sp
= data
->owner
;
647 struct rpc_message msg
= {
648 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
649 .rpc_argp
= &data
->o_arg
,
650 .rpc_resp
= &data
->o_res
,
651 .rpc_cred
= sp
->so_cred
,
654 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
656 /* Update sequence id. */
657 data
->o_arg
.id
= sp
->so_id
;
658 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
659 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
)
660 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
661 data
->timestamp
= jiffies
;
662 rpc_call_setup(task
, &msg
, 0);
665 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
667 struct nfs4_opendata
*data
= calldata
;
669 data
->rpc_status
= task
->tk_status
;
670 if (RPC_ASSASSINATED(task
))
672 if (task
->tk_status
== 0) {
673 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
677 data
->rpc_status
= -ELOOP
;
680 data
->rpc_status
= -EISDIR
;
683 data
->rpc_status
= -ENOTDIR
;
685 renew_lease(data
->o_res
.server
, data
->timestamp
);
687 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
690 static void nfs4_open_release(void *calldata
)
692 struct nfs4_opendata
*data
= calldata
;
693 struct nfs4_state
*state
= NULL
;
695 /* If this request hasn't been cancelled, do nothing */
696 if (data
->cancelled
== 0)
698 /* In case of error, no cleanup! */
699 if (data
->rpc_status
!= 0)
701 /* In case we need an open_confirm, no cleanup! */
702 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
704 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
705 state
= nfs4_opendata_to_nfs4_state(data
);
707 nfs4_close_state(state
, data
->o_arg
.open_flags
);
709 nfs4_opendata_free(data
);
712 static const struct rpc_call_ops nfs4_open_ops
= {
713 .rpc_call_prepare
= nfs4_open_prepare
,
714 .rpc_call_done
= nfs4_open_done
,
715 .rpc_release
= nfs4_open_release
,
719 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
721 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
723 struct inode
*dir
= data
->dir
->d_inode
;
724 struct nfs_server
*server
= NFS_SERVER(dir
);
725 struct nfs_openargs
*o_arg
= &data
->o_arg
;
726 struct nfs_openres
*o_res
= &data
->o_res
;
727 struct rpc_task
*task
;
730 atomic_inc(&data
->count
);
732 * If rpc_run_task() ends up calling ->rpc_release(), we
733 * want to ensure that it takes the 'error' code path.
735 data
->rpc_status
= -ENOMEM
;
736 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_ops
, data
);
738 return PTR_ERR(task
);
739 status
= nfs4_wait_for_completion_rpc_task(task
);
744 status
= data
->rpc_status
;
745 rpc_release_task(task
);
749 if (o_arg
->open_flags
& O_CREAT
) {
750 update_changeattr(dir
, &o_res
->cinfo
);
751 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
753 nfs_refresh_inode(dir
, o_res
->dir_attr
);
754 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
755 status
= _nfs4_proc_open_confirm(data
);
759 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
760 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
761 return server
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
765 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
767 struct nfs_access_entry cache
;
771 if (openflags
& FMODE_READ
)
773 if (openflags
& FMODE_WRITE
)
775 status
= nfs_access_get_cached(inode
, cred
, &cache
);
779 /* Be clever: ask server to check for all possible rights */
780 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
782 cache
.jiffies
= jiffies
;
783 status
= _nfs4_proc_access(inode
, &cache
);
786 nfs_access_add_cache(inode
, &cache
);
788 if ((cache
.mask
& mask
) == mask
)
793 int nfs4_recover_expired_lease(struct nfs_server
*server
)
795 struct nfs_client
*clp
= server
->nfs_client
;
797 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
798 nfs4_schedule_state_recovery(clp
);
799 return nfs4_wait_clnt_recover(server
->client
, clp
);
804 * reclaim state on the server after a network partition.
805 * Assumes caller holds the appropriate lock
807 static int _nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
809 struct inode
*inode
= state
->inode
;
810 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
811 struct nfs4_opendata
*opendata
;
812 int openflags
= state
->state
& (FMODE_READ
|FMODE_WRITE
);
815 if (delegation
!= NULL
&& !(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
816 ret
= _nfs4_do_access(inode
, sp
->so_cred
, openflags
);
819 memcpy(&state
->stateid
, &delegation
->stateid
, sizeof(state
->stateid
));
820 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
823 opendata
= nfs4_opendata_alloc(dentry
, sp
, openflags
, NULL
);
824 if (opendata
== NULL
)
826 ret
= nfs4_open_recover(opendata
, state
);
827 if (ret
== -ESTALE
) {
828 /* Invalidate the state owner so we don't ever use it again */
829 nfs4_drop_state_owner(sp
);
832 nfs4_opendata_free(opendata
);
836 static inline int nfs4_do_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
, struct dentry
*dentry
)
838 struct nfs_server
*server
= NFS_SERVER(dentry
->d_inode
);
839 struct nfs4_exception exception
= { };
843 err
= _nfs4_open_expired(sp
, state
, dentry
);
844 if (err
== -NFS4ERR_DELAY
)
845 nfs4_handle_exception(server
, err
, &exception
);
846 } while (exception
.retry
);
850 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
852 struct nfs_open_context
*ctx
;
855 ctx
= nfs4_state_find_open_context(state
);
858 ret
= nfs4_do_open_expired(sp
, state
, ctx
->dentry
);
859 put_nfs_open_context(ctx
);
864 * Returns a referenced nfs4_state if there is an open delegation on the file
866 static int _nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
868 struct nfs_delegation
*delegation
;
869 struct nfs_server
*server
= NFS_SERVER(inode
);
870 struct nfs_client
*clp
= server
->nfs_client
;
871 struct nfs_inode
*nfsi
= NFS_I(inode
);
872 struct nfs4_state_owner
*sp
= NULL
;
873 struct nfs4_state
*state
= NULL
;
874 int open_flags
= flags
& (FMODE_READ
|FMODE_WRITE
);
878 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
879 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__
);
882 err
= nfs4_recover_expired_lease(server
);
884 goto out_put_state_owner
;
885 /* Protect against reboot recovery - NOTE ORDER! */
886 down_read(&clp
->cl_sem
);
887 /* Protect against delegation recall */
888 down_read(&nfsi
->rwsem
);
889 delegation
= NFS_I(inode
)->delegation
;
891 if (delegation
== NULL
|| (delegation
->type
& open_flags
) != open_flags
)
894 state
= nfs4_get_open_state(inode
, sp
);
899 if ((state
->state
& open_flags
) == open_flags
) {
900 spin_lock(&inode
->i_lock
);
901 update_open_stateflags(state
, open_flags
);
902 spin_unlock(&inode
->i_lock
);
904 } else if (state
->state
!= 0)
905 goto out_put_open_state
;
908 err
= _nfs4_do_access(inode
, cred
, open_flags
);
911 goto out_put_open_state
;
912 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
913 update_open_stateid(state
, &delegation
->stateid
, open_flags
);
915 nfs4_put_state_owner(sp
);
916 up_read(&nfsi
->rwsem
);
917 up_read(&clp
->cl_sem
);
921 nfs4_put_open_state(state
);
923 up_read(&nfsi
->rwsem
);
924 up_read(&clp
->cl_sem
);
926 nfs_inode_return_delegation(inode
);
928 nfs4_put_state_owner(sp
);
932 static struct nfs4_state
*nfs4_open_delegated(struct inode
*inode
, int flags
, struct rpc_cred
*cred
)
934 struct nfs4_exception exception
= { };
935 struct nfs4_state
*res
= ERR_PTR(-EIO
);
939 err
= _nfs4_open_delegated(inode
, flags
, cred
, &res
);
942 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode
),
944 } while (exception
.retry
);
949 * Returns a referenced nfs4_state
951 static int _nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
953 struct nfs4_state_owner
*sp
;
954 struct nfs4_state
*state
= NULL
;
955 struct nfs_server
*server
= NFS_SERVER(dir
);
956 struct nfs_client
*clp
= server
->nfs_client
;
957 struct nfs4_opendata
*opendata
;
960 /* Protect against reboot recovery conflicts */
962 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
963 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
966 status
= nfs4_recover_expired_lease(server
);
968 goto err_put_state_owner
;
969 down_read(&clp
->cl_sem
);
971 opendata
= nfs4_opendata_alloc(dentry
, sp
, flags
, sattr
);
972 if (opendata
== NULL
)
973 goto err_release_rwsem
;
975 status
= _nfs4_proc_open(opendata
);
977 goto err_opendata_free
;
980 state
= nfs4_opendata_to_nfs4_state(opendata
);
982 goto err_opendata_free
;
983 if (opendata
->o_res
.delegation_type
!= 0)
984 nfs_inode_set_delegation(state
->inode
, cred
, &opendata
->o_res
);
985 nfs4_opendata_free(opendata
);
986 nfs4_put_state_owner(sp
);
987 up_read(&clp
->cl_sem
);
991 nfs4_opendata_free(opendata
);
993 up_read(&clp
->cl_sem
);
995 nfs4_put_state_owner(sp
);
1002 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct dentry
*dentry
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1004 struct nfs4_exception exception
= { };
1005 struct nfs4_state
*res
;
1009 status
= _nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
, &res
);
1012 /* NOTE: BAD_SEQID means the server and client disagree about the
1013 * book-keeping w.r.t. state-changing operations
1014 * (OPEN/CLOSE/LOCK/LOCKU...)
1015 * It is actually a sign of a bug on the client or on the server.
1017 * If we receive a BAD_SEQID error in the particular case of
1018 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1019 * have unhashed the old state_owner for us, and that we can
1020 * therefore safely retry using a new one. We should still warn
1021 * the user though...
1023 if (status
== -NFS4ERR_BAD_SEQID
) {
1024 printk(KERN_WARNING
"NFS: v4 server returned a bad sequence-id error!\n");
1025 exception
.retry
= 1;
1029 * BAD_STATEID on OPEN means that the server cancelled our
1030 * state before it received the OPEN_CONFIRM.
1031 * Recover by retrying the request as per the discussion
1032 * on Page 181 of RFC3530.
1034 if (status
== -NFS4ERR_BAD_STATEID
) {
1035 exception
.retry
= 1;
1038 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1039 status
, &exception
));
1040 } while (exception
.retry
);
1044 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1045 struct iattr
*sattr
, struct nfs4_state
*state
)
1047 struct nfs_server
*server
= NFS_SERVER(inode
);
1048 struct nfs_setattrargs arg
= {
1049 .fh
= NFS_FH(inode
),
1052 .bitmask
= server
->attr_bitmask
,
1054 struct nfs_setattrres res
= {
1058 struct rpc_message msg
= {
1059 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1063 unsigned long timestamp
= jiffies
;
1066 nfs_fattr_init(fattr
);
1068 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1069 /* Use that stateid */
1070 } else if (state
!= NULL
) {
1071 msg
.rpc_cred
= state
->owner
->so_cred
;
1072 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1074 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1076 status
= rpc_call_sync(server
->client
, &msg
, 0);
1077 if (status
== 0 && state
!= NULL
)
1078 renew_lease(server
, timestamp
);
1082 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1083 struct iattr
*sattr
, struct nfs4_state
*state
)
1085 struct nfs_server
*server
= NFS_SERVER(inode
);
1086 struct nfs4_exception exception
= { };
1089 err
= nfs4_handle_exception(server
,
1090 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1092 } while (exception
.retry
);
1096 struct nfs4_closedata
{
1097 struct inode
*inode
;
1098 struct nfs4_state
*state
;
1099 struct nfs_closeargs arg
;
1100 struct nfs_closeres res
;
1101 struct nfs_fattr fattr
;
1102 unsigned long timestamp
;
1105 static void nfs4_free_closedata(void *data
)
1107 struct nfs4_closedata
*calldata
= data
;
1108 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1110 nfs4_put_open_state(calldata
->state
);
1111 nfs_free_seqid(calldata
->arg
.seqid
);
1112 nfs4_put_state_owner(sp
);
1116 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1118 struct nfs4_closedata
*calldata
= data
;
1119 struct nfs4_state
*state
= calldata
->state
;
1120 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1122 if (RPC_ASSASSINATED(task
))
1124 /* hmm. we are done with the inode, and in the process of freeing
1125 * the state_owner. we keep this around to process errors
1127 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1128 switch (task
->tk_status
) {
1130 memcpy(&state
->stateid
, &calldata
->res
.stateid
,
1131 sizeof(state
->stateid
));
1132 renew_lease(server
, calldata
->timestamp
);
1134 case -NFS4ERR_STALE_STATEID
:
1135 case -NFS4ERR_EXPIRED
:
1136 nfs4_schedule_state_recovery(server
->nfs_client
);
1139 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1140 rpc_restart_call(task
);
1144 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1147 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1149 struct nfs4_closedata
*calldata
= data
;
1150 struct nfs4_state
*state
= calldata
->state
;
1151 struct rpc_message msg
= {
1152 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1153 .rpc_argp
= &calldata
->arg
,
1154 .rpc_resp
= &calldata
->res
,
1155 .rpc_cred
= state
->owner
->so_cred
,
1157 int mode
= 0, old_mode
;
1159 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1161 /* Recalculate the new open mode in case someone reopened the file
1162 * while we were waiting in line to be scheduled.
1164 spin_lock(&state
->owner
->so_lock
);
1165 spin_lock(&calldata
->inode
->i_lock
);
1166 mode
= old_mode
= state
->state
;
1167 if (state
->n_rdwr
== 0) {
1168 if (state
->n_rdonly
== 0)
1169 mode
&= ~FMODE_READ
;
1170 if (state
->n_wronly
== 0)
1171 mode
&= ~FMODE_WRITE
;
1173 nfs4_state_set_mode_locked(state
, mode
);
1174 spin_unlock(&calldata
->inode
->i_lock
);
1175 spin_unlock(&state
->owner
->so_lock
);
1176 if (mode
== old_mode
|| test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
1177 /* Note: exit _without_ calling nfs4_close_done */
1178 task
->tk_action
= NULL
;
1181 nfs_fattr_init(calldata
->res
.fattr
);
1183 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1184 calldata
->arg
.open_flags
= mode
;
1185 calldata
->timestamp
= jiffies
;
1186 rpc_call_setup(task
, &msg
, 0);
1189 static const struct rpc_call_ops nfs4_close_ops
= {
1190 .rpc_call_prepare
= nfs4_close_prepare
,
1191 .rpc_call_done
= nfs4_close_done
,
1192 .rpc_release
= nfs4_free_closedata
,
1196 * It is possible for data to be read/written from a mem-mapped file
1197 * after the sys_close call (which hits the vfs layer as a flush).
1198 * This means that we can't safely call nfsv4 close on a file until
1199 * the inode is cleared. This in turn means that we are not good
1200 * NFSv4 citizens - we do not indicate to the server to update the file's
1201 * share state even when we are done with one of the three share
1202 * stateid's in the inode.
1204 * NOTE: Caller must be holding the sp->so_owner semaphore!
1206 int nfs4_do_close(struct inode
*inode
, struct nfs4_state
*state
)
1208 struct nfs_server
*server
= NFS_SERVER(inode
);
1209 struct nfs4_closedata
*calldata
;
1210 int status
= -ENOMEM
;
1212 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1213 if (calldata
== NULL
)
1215 calldata
->inode
= inode
;
1216 calldata
->state
= state
;
1217 calldata
->arg
.fh
= NFS_FH(inode
);
1218 calldata
->arg
.stateid
= &state
->stateid
;
1219 /* Serialization for the sequence id */
1220 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1221 if (calldata
->arg
.seqid
== NULL
)
1222 goto out_free_calldata
;
1223 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1224 calldata
->res
.fattr
= &calldata
->fattr
;
1225 calldata
->res
.server
= server
;
1227 status
= nfs4_call_async(server
->client
, &nfs4_close_ops
, calldata
);
1231 nfs_free_seqid(calldata
->arg
.seqid
);
1238 static int nfs4_intent_set_file(struct nameidata
*nd
, struct dentry
*dentry
, struct nfs4_state
*state
)
1242 filp
= lookup_instantiate_filp(nd
, dentry
, NULL
);
1243 if (!IS_ERR(filp
)) {
1244 struct nfs_open_context
*ctx
;
1245 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1249 nfs4_close_state(state
, nd
->intent
.open
.flags
);
1250 return PTR_ERR(filp
);
1254 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1257 struct rpc_cred
*cred
;
1258 struct nfs4_state
*state
;
1261 if (nd
->flags
& LOOKUP_CREATE
) {
1262 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1263 attr
.ia_valid
= ATTR_MODE
;
1264 if (!IS_POSIXACL(dir
))
1265 attr
.ia_mode
&= ~current
->fs
->umask
;
1268 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1271 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1273 return (struct dentry
*)cred
;
1274 state
= nfs4_do_open(dir
, dentry
, nd
->intent
.open
.flags
, &attr
, cred
);
1276 if (IS_ERR(state
)) {
1277 if (PTR_ERR(state
) == -ENOENT
)
1278 d_add(dentry
, NULL
);
1279 return (struct dentry
*)state
;
1281 res
= d_add_unique(dentry
, igrab(state
->inode
));
1284 nfs4_intent_set_file(nd
, dentry
, state
);
1289 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1291 struct rpc_cred
*cred
;
1292 struct nfs4_state
*state
;
1294 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1296 return PTR_ERR(cred
);
1297 state
= nfs4_open_delegated(dentry
->d_inode
, openflags
, cred
);
1299 state
= nfs4_do_open(dir
, dentry
, openflags
, NULL
, cred
);
1301 if (IS_ERR(state
)) {
1302 switch (PTR_ERR(state
)) {
1308 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1311 if (dentry
->d_inode
== NULL
)
1316 if (state
->inode
== dentry
->d_inode
) {
1317 nfs4_intent_set_file(nd
, dentry
, state
);
1320 nfs4_close_state(state
, openflags
);
1327 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1329 struct nfs4_server_caps_res res
= {};
1330 struct rpc_message msg
= {
1331 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1332 .rpc_argp
= fhandle
,
1337 status
= rpc_call_sync(server
->client
, &msg
, 0);
1339 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1340 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1341 server
->caps
|= NFS_CAP_ACLS
;
1342 if (res
.has_links
!= 0)
1343 server
->caps
|= NFS_CAP_HARDLINKS
;
1344 if (res
.has_symlinks
!= 0)
1345 server
->caps
|= NFS_CAP_SYMLINKS
;
1346 server
->acl_bitmask
= res
.acl_bitmask
;
1351 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1353 struct nfs4_exception exception
= { };
1356 err
= nfs4_handle_exception(server
,
1357 _nfs4_server_capabilities(server
, fhandle
),
1359 } while (exception
.retry
);
1363 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1364 struct nfs_fsinfo
*info
)
1366 struct nfs4_lookup_root_arg args
= {
1367 .bitmask
= nfs4_fattr_bitmap
,
1369 struct nfs4_lookup_res res
= {
1371 .fattr
= info
->fattr
,
1374 struct rpc_message msg
= {
1375 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1379 nfs_fattr_init(info
->fattr
);
1380 return rpc_call_sync(server
->client
, &msg
, 0);
1383 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1384 struct nfs_fsinfo
*info
)
1386 struct nfs4_exception exception
= { };
1389 err
= nfs4_handle_exception(server
,
1390 _nfs4_lookup_root(server
, fhandle
, info
),
1392 } while (exception
.retry
);
1396 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1397 struct nfs_fsinfo
*info
)
1399 struct nfs_fattr
* fattr
= info
->fattr
;
1402 struct nfs4_lookup_arg args
= {
1405 .bitmask
= nfs4_fattr_bitmap
,
1407 struct nfs4_lookup_res res
= {
1412 struct rpc_message msg
= {
1413 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1420 * Now we do a separate LOOKUP for each component of the mount path.
1421 * The LOOKUPs are done separately so that we can conveniently
1422 * catch an ERR_WRONGSEC if it occurs along the way...
1424 status
= nfs4_lookup_root(server
, fhandle
, info
);
1428 p
= server
->mnt_path
;
1430 struct nfs4_exception exception
= { };
1437 while (*p
&& (*p
!= '/'))
1442 nfs_fattr_init(fattr
);
1443 status
= nfs4_handle_exception(server
,
1444 rpc_call_sync(server
->client
, &msg
, 0),
1446 } while (exception
.retry
);
1449 if (status
== -ENOENT
) {
1450 printk(KERN_NOTICE
"NFS: mount path %s does not exist!\n", server
->mnt_path
);
1451 printk(KERN_NOTICE
"NFS: suggestion: try mounting '/' instead.\n");
1456 status
= nfs4_server_capabilities(server
, fhandle
);
1458 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1460 return nfs4_map_errors(status
);
1464 * Get locations and (maybe) other attributes of a referral.
1465 * Note that we'll actually follow the referral later when
1466 * we detect fsid mismatch in inode revalidation
1468 static int nfs4_get_referral(struct inode
*dir
, struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1470 int status
= -ENOMEM
;
1471 struct page
*page
= NULL
;
1472 struct nfs4_fs_locations
*locations
= NULL
;
1473 struct dentry dentry
= {};
1475 page
= alloc_page(GFP_KERNEL
);
1478 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1479 if (locations
== NULL
)
1482 dentry
.d_name
.name
= name
->name
;
1483 dentry
.d_name
.len
= name
->len
;
1484 status
= nfs4_proc_fs_locations(dir
, &dentry
, locations
, page
);
1487 /* Make sure server returned a different fsid for the referral */
1488 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1489 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1494 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1495 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1497 fattr
->mode
= S_IFDIR
;
1498 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1507 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1509 struct nfs4_getattr_arg args
= {
1511 .bitmask
= server
->attr_bitmask
,
1513 struct nfs4_getattr_res res
= {
1517 struct rpc_message msg
= {
1518 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1523 nfs_fattr_init(fattr
);
1524 return rpc_call_sync(server
->client
, &msg
, 0);
1527 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1529 struct nfs4_exception exception
= { };
1532 err
= nfs4_handle_exception(server
,
1533 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1535 } while (exception
.retry
);
1540 * The file is not closed if it is opened due to the a request to change
1541 * the size of the file. The open call will not be needed once the
1542 * VFS layer lookup-intents are implemented.
1544 * Close is called when the inode is destroyed.
1545 * If we haven't opened the file for O_WRONLY, we
1546 * need to in the size_change case to obtain a stateid.
1549 * Because OPEN is always done by name in nfsv4, it is
1550 * possible that we opened a different file by the same
1551 * name. We can recognize this race condition, but we
1552 * can't do anything about it besides returning an error.
1554 * This will be fixed with VFS changes (lookup-intent).
1557 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1558 struct iattr
*sattr
)
1560 struct rpc_cred
*cred
;
1561 struct inode
*inode
= dentry
->d_inode
;
1562 struct nfs_open_context
*ctx
;
1563 struct nfs4_state
*state
= NULL
;
1566 nfs_fattr_init(fattr
);
1568 cred
= rpcauth_lookupcred(NFS_SERVER(inode
)->client
->cl_auth
, 0);
1570 return PTR_ERR(cred
);
1572 /* Search for an existing open(O_WRITE) file */
1573 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1577 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1579 nfs_setattr_update_inode(inode
, sattr
);
1581 put_nfs_open_context(ctx
);
1586 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1587 struct qstr
*name
, struct nfs_fh
*fhandle
,
1588 struct nfs_fattr
*fattr
)
1591 struct nfs4_lookup_arg args
= {
1592 .bitmask
= server
->attr_bitmask
,
1596 struct nfs4_lookup_res res
= {
1601 struct rpc_message msg
= {
1602 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1607 nfs_fattr_init(fattr
);
1609 dprintk("NFS call lookupfh %s\n", name
->name
);
1610 status
= rpc_call_sync(server
->client
, &msg
, 0);
1611 dprintk("NFS reply lookupfh: %d\n", status
);
1612 if (status
== -NFS4ERR_MOVED
)
1617 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1618 struct qstr
*name
, struct nfs_fh
*fhandle
,
1619 struct nfs_fattr
*fattr
)
1621 struct nfs4_exception exception
= { };
1624 err
= nfs4_handle_exception(server
,
1625 _nfs4_proc_lookupfh(server
, dirfh
, name
,
1628 } while (exception
.retry
);
1632 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1633 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1636 struct nfs_server
*server
= NFS_SERVER(dir
);
1637 struct nfs4_lookup_arg args
= {
1638 .bitmask
= server
->attr_bitmask
,
1639 .dir_fh
= NFS_FH(dir
),
1642 struct nfs4_lookup_res res
= {
1647 struct rpc_message msg
= {
1648 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1653 nfs_fattr_init(fattr
);
1655 dprintk("NFS call lookup %s\n", name
->name
);
1656 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
1657 if (status
== -NFS4ERR_MOVED
)
1658 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1659 dprintk("NFS reply lookup: %d\n", status
);
1663 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1665 struct nfs4_exception exception
= { };
1668 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1669 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1671 } while (exception
.retry
);
1675 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1677 struct nfs4_accessargs args
= {
1678 .fh
= NFS_FH(inode
),
1680 struct nfs4_accessres res
= { 0 };
1681 struct rpc_message msg
= {
1682 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1685 .rpc_cred
= entry
->cred
,
1687 int mode
= entry
->mask
;
1691 * Determine which access bits we want to ask for...
1693 if (mode
& MAY_READ
)
1694 args
.access
|= NFS4_ACCESS_READ
;
1695 if (S_ISDIR(inode
->i_mode
)) {
1696 if (mode
& MAY_WRITE
)
1697 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1698 if (mode
& MAY_EXEC
)
1699 args
.access
|= NFS4_ACCESS_LOOKUP
;
1701 if (mode
& MAY_WRITE
)
1702 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1703 if (mode
& MAY_EXEC
)
1704 args
.access
|= NFS4_ACCESS_EXECUTE
;
1706 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1709 if (res
.access
& NFS4_ACCESS_READ
)
1710 entry
->mask
|= MAY_READ
;
1711 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1712 entry
->mask
|= MAY_WRITE
;
1713 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1714 entry
->mask
|= MAY_EXEC
;
1719 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1721 struct nfs4_exception exception
= { };
1724 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1725 _nfs4_proc_access(inode
, entry
),
1727 } while (exception
.retry
);
1732 * TODO: For the time being, we don't try to get any attributes
1733 * along with any of the zero-copy operations READ, READDIR,
1736 * In the case of the first three, we want to put the GETATTR
1737 * after the read-type operation -- this is because it is hard
1738 * to predict the length of a GETATTR response in v4, and thus
1739 * align the READ data correctly. This means that the GETATTR
1740 * may end up partially falling into the page cache, and we should
1741 * shift it into the 'tail' of the xdr_buf before processing.
1742 * To do this efficiently, we need to know the total length
1743 * of data received, which doesn't seem to be available outside
1746 * In the case of WRITE, we also want to put the GETATTR after
1747 * the operation -- in this case because we want to make sure
1748 * we get the post-operation mtime and size. This means that
1749 * we can't use xdr_encode_pages() as written: we need a variant
1750 * of it which would leave room in the 'tail' iovec.
1752 * Both of these changes to the XDR layer would in fact be quite
1753 * minor, but I decided to leave them for a subsequent patch.
1755 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1756 unsigned int pgbase
, unsigned int pglen
)
1758 struct nfs4_readlink args
= {
1759 .fh
= NFS_FH(inode
),
1764 struct rpc_message msg
= {
1765 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1770 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1773 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1774 unsigned int pgbase
, unsigned int pglen
)
1776 struct nfs4_exception exception
= { };
1779 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1780 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1782 } while (exception
.retry
);
1786 static int _nfs4_proc_read(struct nfs_read_data
*rdata
)
1788 int flags
= rdata
->flags
;
1789 struct inode
*inode
= rdata
->inode
;
1790 struct nfs_fattr
*fattr
= rdata
->res
.fattr
;
1791 struct nfs_server
*server
= NFS_SERVER(inode
);
1792 struct rpc_message msg
= {
1793 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
1794 .rpc_argp
= &rdata
->args
,
1795 .rpc_resp
= &rdata
->res
,
1796 .rpc_cred
= rdata
->cred
,
1798 unsigned long timestamp
= jiffies
;
1801 dprintk("NFS call read %d @ %Ld\n", rdata
->args
.count
,
1802 (long long) rdata
->args
.offset
);
1804 nfs_fattr_init(fattr
);
1805 status
= rpc_call_sync(server
->client
, &msg
, flags
);
1807 renew_lease(server
, timestamp
);
1808 dprintk("NFS reply read: %d\n", status
);
1812 static int nfs4_proc_read(struct nfs_read_data
*rdata
)
1814 struct nfs4_exception exception
= { };
1817 err
= nfs4_handle_exception(NFS_SERVER(rdata
->inode
),
1818 _nfs4_proc_read(rdata
),
1820 } while (exception
.retry
);
1824 static int _nfs4_proc_write(struct nfs_write_data
*wdata
)
1826 int rpcflags
= wdata
->flags
;
1827 struct inode
*inode
= wdata
->inode
;
1828 struct nfs_fattr
*fattr
= wdata
->res
.fattr
;
1829 struct nfs_server
*server
= NFS_SERVER(inode
);
1830 struct rpc_message msg
= {
1831 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
1832 .rpc_argp
= &wdata
->args
,
1833 .rpc_resp
= &wdata
->res
,
1834 .rpc_cred
= wdata
->cred
,
1838 dprintk("NFS call write %d @ %Ld\n", wdata
->args
.count
,
1839 (long long) wdata
->args
.offset
);
1841 wdata
->args
.bitmask
= server
->attr_bitmask
;
1842 wdata
->res
.server
= server
;
1843 wdata
->timestamp
= jiffies
;
1844 nfs_fattr_init(fattr
);
1845 status
= rpc_call_sync(server
->client
, &msg
, rpcflags
);
1846 dprintk("NFS reply write: %d\n", status
);
1849 renew_lease(server
, wdata
->timestamp
);
1850 nfs_post_op_update_inode(inode
, fattr
);
1851 return wdata
->res
.count
;
1854 static int nfs4_proc_write(struct nfs_write_data
*wdata
)
1856 struct nfs4_exception exception
= { };
1859 err
= nfs4_handle_exception(NFS_SERVER(wdata
->inode
),
1860 _nfs4_proc_write(wdata
),
1862 } while (exception
.retry
);
1866 static int _nfs4_proc_commit(struct nfs_write_data
*cdata
)
1868 struct inode
*inode
= cdata
->inode
;
1869 struct nfs_fattr
*fattr
= cdata
->res
.fattr
;
1870 struct nfs_server
*server
= NFS_SERVER(inode
);
1871 struct rpc_message msg
= {
1872 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
1873 .rpc_argp
= &cdata
->args
,
1874 .rpc_resp
= &cdata
->res
,
1875 .rpc_cred
= cdata
->cred
,
1879 dprintk("NFS call commit %d @ %Ld\n", cdata
->args
.count
,
1880 (long long) cdata
->args
.offset
);
1882 cdata
->args
.bitmask
= server
->attr_bitmask
;
1883 cdata
->res
.server
= server
;
1884 cdata
->timestamp
= jiffies
;
1885 nfs_fattr_init(fattr
);
1886 status
= rpc_call_sync(server
->client
, &msg
, 0);
1888 renew_lease(server
, cdata
->timestamp
);
1889 dprintk("NFS reply commit: %d\n", status
);
1891 nfs_post_op_update_inode(inode
, fattr
);
1895 static int nfs4_proc_commit(struct nfs_write_data
*cdata
)
1897 struct nfs4_exception exception
= { };
1900 err
= nfs4_handle_exception(NFS_SERVER(cdata
->inode
),
1901 _nfs4_proc_commit(cdata
),
1903 } while (exception
.retry
);
1909 * We will need to arrange for the VFS layer to provide an atomic open.
1910 * Until then, this create/open method is prone to inefficiency and race
1911 * conditions due to the lookup, create, and open VFS calls from sys_open()
1912 * placed on the wire.
1914 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1915 * The file will be opened again in the subsequent VFS open call
1916 * (nfs4_proc_file_open).
1918 * The open for read will just hang around to be used by any process that
1919 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1923 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1924 int flags
, struct nameidata
*nd
)
1926 struct nfs4_state
*state
;
1927 struct rpc_cred
*cred
;
1930 cred
= rpcauth_lookupcred(NFS_SERVER(dir
)->client
->cl_auth
, 0);
1932 status
= PTR_ERR(cred
);
1935 state
= nfs4_do_open(dir
, dentry
, flags
, sattr
, cred
);
1937 if (IS_ERR(state
)) {
1938 status
= PTR_ERR(state
);
1941 d_instantiate(dentry
, igrab(state
->inode
));
1942 if (flags
& O_EXCL
) {
1943 struct nfs_fattr fattr
;
1944 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1946 nfs_setattr_update_inode(state
->inode
, sattr
);
1948 if (status
== 0 && nd
!= NULL
&& (nd
->flags
& LOOKUP_OPEN
))
1949 status
= nfs4_intent_set_file(nd
, dentry
, state
);
1951 nfs4_close_state(state
, flags
);
1956 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1958 struct nfs_server
*server
= NFS_SERVER(dir
);
1959 struct nfs4_remove_arg args
= {
1962 .bitmask
= server
->attr_bitmask
,
1964 struct nfs_fattr dir_attr
;
1965 struct nfs4_remove_res res
= {
1967 .dir_attr
= &dir_attr
,
1969 struct rpc_message msg
= {
1970 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1976 nfs_fattr_init(res
.dir_attr
);
1977 status
= rpc_call_sync(server
->client
, &msg
, 0);
1979 update_changeattr(dir
, &res
.cinfo
);
1980 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1985 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1987 struct nfs4_exception exception
= { };
1990 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1991 _nfs4_proc_remove(dir
, name
),
1993 } while (exception
.retry
);
1997 struct unlink_desc
{
1998 struct nfs4_remove_arg args
;
1999 struct nfs4_remove_res res
;
2000 struct nfs_fattr dir_attr
;
2003 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
2006 struct nfs_server
*server
= NFS_SERVER(dir
->d_inode
);
2007 struct unlink_desc
*up
;
2009 up
= (struct unlink_desc
*) kmalloc(sizeof(*up
), GFP_KERNEL
);
2013 up
->args
.fh
= NFS_FH(dir
->d_inode
);
2014 up
->args
.name
= name
;
2015 up
->args
.bitmask
= server
->attr_bitmask
;
2016 up
->res
.server
= server
;
2017 up
->res
.dir_attr
= &up
->dir_attr
;
2019 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2020 msg
->rpc_argp
= &up
->args
;
2021 msg
->rpc_resp
= &up
->res
;
2025 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
2027 struct rpc_message
*msg
= &task
->tk_msg
;
2028 struct unlink_desc
*up
;
2030 if (msg
->rpc_resp
!= NULL
) {
2031 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
2032 update_changeattr(dir
->d_inode
, &up
->res
.cinfo
);
2033 nfs_post_op_update_inode(dir
->d_inode
, up
->res
.dir_attr
);
2035 msg
->rpc_resp
= NULL
;
2036 msg
->rpc_argp
= NULL
;
2041 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2042 struct inode
*new_dir
, struct qstr
*new_name
)
2044 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2045 struct nfs4_rename_arg arg
= {
2046 .old_dir
= NFS_FH(old_dir
),
2047 .new_dir
= NFS_FH(new_dir
),
2048 .old_name
= old_name
,
2049 .new_name
= new_name
,
2050 .bitmask
= server
->attr_bitmask
,
2052 struct nfs_fattr old_fattr
, new_fattr
;
2053 struct nfs4_rename_res res
= {
2055 .old_fattr
= &old_fattr
,
2056 .new_fattr
= &new_fattr
,
2058 struct rpc_message msg
= {
2059 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2065 nfs_fattr_init(res
.old_fattr
);
2066 nfs_fattr_init(res
.new_fattr
);
2067 status
= rpc_call_sync(server
->client
, &msg
, 0);
2070 update_changeattr(old_dir
, &res
.old_cinfo
);
2071 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2072 update_changeattr(new_dir
, &res
.new_cinfo
);
2073 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2078 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2079 struct inode
*new_dir
, struct qstr
*new_name
)
2081 struct nfs4_exception exception
= { };
2084 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2085 _nfs4_proc_rename(old_dir
, old_name
,
2088 } while (exception
.retry
);
2092 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2094 struct nfs_server
*server
= NFS_SERVER(inode
);
2095 struct nfs4_link_arg arg
= {
2096 .fh
= NFS_FH(inode
),
2097 .dir_fh
= NFS_FH(dir
),
2099 .bitmask
= server
->attr_bitmask
,
2101 struct nfs_fattr fattr
, dir_attr
;
2102 struct nfs4_link_res res
= {
2105 .dir_attr
= &dir_attr
,
2107 struct rpc_message msg
= {
2108 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2114 nfs_fattr_init(res
.fattr
);
2115 nfs_fattr_init(res
.dir_attr
);
2116 status
= rpc_call_sync(server
->client
, &msg
, 0);
2118 update_changeattr(dir
, &res
.cinfo
);
2119 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2120 nfs_post_op_update_inode(inode
, res
.fattr
);
2126 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2128 struct nfs4_exception exception
= { };
2131 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2132 _nfs4_proc_link(inode
, dir
, name
),
2134 } while (exception
.retry
);
2138 static int _nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
2139 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
2140 struct nfs_fattr
*fattr
)
2142 struct nfs_server
*server
= NFS_SERVER(dir
);
2143 struct nfs_fattr dir_fattr
;
2144 struct nfs4_create_arg arg
= {
2145 .dir_fh
= NFS_FH(dir
),
2150 .bitmask
= server
->attr_bitmask
,
2152 struct nfs4_create_res res
= {
2156 .dir_fattr
= &dir_fattr
,
2158 struct rpc_message msg
= {
2159 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
2165 if (path
->len
> NFS4_MAXPATHLEN
)
2166 return -ENAMETOOLONG
;
2167 arg
.u
.symlink
= path
;
2168 nfs_fattr_init(fattr
);
2169 nfs_fattr_init(&dir_fattr
);
2171 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2173 update_changeattr(dir
, &res
.dir_cinfo
);
2174 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2178 static int nfs4_proc_symlink(struct inode
*dir
, struct qstr
*name
,
2179 struct qstr
*path
, struct iattr
*sattr
, struct nfs_fh
*fhandle
,
2180 struct nfs_fattr
*fattr
)
2182 struct nfs4_exception exception
= { };
2185 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2186 _nfs4_proc_symlink(dir
, name
, path
, sattr
,
2189 } while (exception
.retry
);
2193 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2194 struct iattr
*sattr
)
2196 struct nfs_server
*server
= NFS_SERVER(dir
);
2197 struct nfs_fh fhandle
;
2198 struct nfs_fattr fattr
, dir_fattr
;
2199 struct nfs4_create_arg arg
= {
2200 .dir_fh
= NFS_FH(dir
),
2202 .name
= &dentry
->d_name
,
2205 .bitmask
= server
->attr_bitmask
,
2207 struct nfs4_create_res res
= {
2211 .dir_fattr
= &dir_fattr
,
2213 struct rpc_message msg
= {
2214 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2220 nfs_fattr_init(&fattr
);
2221 nfs_fattr_init(&dir_fattr
);
2223 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2225 update_changeattr(dir
, &res
.dir_cinfo
);
2226 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2227 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2232 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2233 struct iattr
*sattr
)
2235 struct nfs4_exception exception
= { };
2238 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2239 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2241 } while (exception
.retry
);
2245 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2246 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2248 struct inode
*dir
= dentry
->d_inode
;
2249 struct nfs4_readdir_arg args
= {
2254 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2256 struct nfs4_readdir_res res
;
2257 struct rpc_message msg
= {
2258 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2265 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
2266 dentry
->d_parent
->d_name
.name
,
2267 dentry
->d_name
.name
,
2268 (unsigned long long)cookie
);
2270 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2271 res
.pgbase
= args
.pgbase
;
2272 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2274 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2276 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2280 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2281 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2283 struct nfs4_exception exception
= { };
2286 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2287 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2290 } while (exception
.retry
);
2294 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2295 struct iattr
*sattr
, dev_t rdev
)
2297 struct nfs_server
*server
= NFS_SERVER(dir
);
2299 struct nfs_fattr fattr
, dir_fattr
;
2300 struct nfs4_create_arg arg
= {
2301 .dir_fh
= NFS_FH(dir
),
2303 .name
= &dentry
->d_name
,
2305 .bitmask
= server
->attr_bitmask
,
2307 struct nfs4_create_res res
= {
2311 .dir_fattr
= &dir_fattr
,
2313 struct rpc_message msg
= {
2314 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2319 int mode
= sattr
->ia_mode
;
2321 nfs_fattr_init(&fattr
);
2322 nfs_fattr_init(&dir_fattr
);
2324 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2325 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2327 arg
.ftype
= NF4FIFO
;
2328 else if (S_ISBLK(mode
)) {
2330 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2331 arg
.u
.device
.specdata2
= MINOR(rdev
);
2333 else if (S_ISCHR(mode
)) {
2335 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2336 arg
.u
.device
.specdata2
= MINOR(rdev
);
2339 arg
.ftype
= NF4SOCK
;
2341 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2343 update_changeattr(dir
, &res
.dir_cinfo
);
2344 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2345 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2350 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2351 struct iattr
*sattr
, dev_t rdev
)
2353 struct nfs4_exception exception
= { };
2356 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2357 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2359 } while (exception
.retry
);
2363 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2364 struct nfs_fsstat
*fsstat
)
2366 struct nfs4_statfs_arg args
= {
2368 .bitmask
= server
->attr_bitmask
,
2370 struct rpc_message msg
= {
2371 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2376 nfs_fattr_init(fsstat
->fattr
);
2377 return rpc_call_sync(server
->client
, &msg
, 0);
2380 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2382 struct nfs4_exception exception
= { };
2385 err
= nfs4_handle_exception(server
,
2386 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2388 } while (exception
.retry
);
2392 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2393 struct nfs_fsinfo
*fsinfo
)
2395 struct nfs4_fsinfo_arg args
= {
2397 .bitmask
= server
->attr_bitmask
,
2399 struct rpc_message msg
= {
2400 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2405 return rpc_call_sync(server
->client
, &msg
, 0);
2408 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2410 struct nfs4_exception exception
= { };
2414 err
= nfs4_handle_exception(server
,
2415 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2417 } while (exception
.retry
);
2421 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2423 nfs_fattr_init(fsinfo
->fattr
);
2424 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2427 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2428 struct nfs_pathconf
*pathconf
)
2430 struct nfs4_pathconf_arg args
= {
2432 .bitmask
= server
->attr_bitmask
,
2434 struct rpc_message msg
= {
2435 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2437 .rpc_resp
= pathconf
,
2440 /* None of the pathconf attributes are mandatory to implement */
2441 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2442 memset(pathconf
, 0, sizeof(*pathconf
));
2446 nfs_fattr_init(pathconf
->fattr
);
2447 return rpc_call_sync(server
->client
, &msg
, 0);
2450 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2451 struct nfs_pathconf
*pathconf
)
2453 struct nfs4_exception exception
= { };
2457 err
= nfs4_handle_exception(server
,
2458 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2460 } while (exception
.retry
);
2464 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2466 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2468 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2469 rpc_restart_call(task
);
2472 if (task
->tk_status
> 0)
2473 renew_lease(server
, data
->timestamp
);
2477 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2479 struct rpc_message msg
= {
2480 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2481 .rpc_argp
= &data
->args
,
2482 .rpc_resp
= &data
->res
,
2483 .rpc_cred
= data
->cred
,
2486 data
->timestamp
= jiffies
;
2488 rpc_call_setup(&data
->task
, &msg
, 0);
2491 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2493 struct inode
*inode
= data
->inode
;
2495 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2496 rpc_restart_call(task
);
2499 if (task
->tk_status
>= 0) {
2500 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2501 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2506 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2508 struct rpc_message msg
= {
2509 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2510 .rpc_argp
= &data
->args
,
2511 .rpc_resp
= &data
->res
,
2512 .rpc_cred
= data
->cred
,
2514 struct inode
*inode
= data
->inode
;
2515 struct nfs_server
*server
= NFS_SERVER(inode
);
2518 if (how
& FLUSH_STABLE
) {
2519 if (!NFS_I(inode
)->ncommit
)
2520 stable
= NFS_FILE_SYNC
;
2522 stable
= NFS_DATA_SYNC
;
2524 stable
= NFS_UNSTABLE
;
2525 data
->args
.stable
= stable
;
2526 data
->args
.bitmask
= server
->attr_bitmask
;
2527 data
->res
.server
= server
;
2529 data
->timestamp
= jiffies
;
2531 /* Finalize the task. */
2532 rpc_call_setup(&data
->task
, &msg
, 0);
2535 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2537 struct inode
*inode
= data
->inode
;
2539 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2540 rpc_restart_call(task
);
2543 if (task
->tk_status
>= 0)
2544 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2548 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2550 struct rpc_message msg
= {
2551 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2552 .rpc_argp
= &data
->args
,
2553 .rpc_resp
= &data
->res
,
2554 .rpc_cred
= data
->cred
,
2556 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2558 data
->args
.bitmask
= server
->attr_bitmask
;
2559 data
->res
.server
= server
;
2561 rpc_call_setup(&data
->task
, &msg
, 0);
2565 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2566 * standalone procedure for queueing an asynchronous RENEW.
2568 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2570 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2571 unsigned long timestamp
= (unsigned long)data
;
2573 if (task
->tk_status
< 0) {
2574 switch (task
->tk_status
) {
2575 case -NFS4ERR_STALE_CLIENTID
:
2576 case -NFS4ERR_EXPIRED
:
2577 case -NFS4ERR_CB_PATH_DOWN
:
2578 nfs4_schedule_state_recovery(clp
);
2582 spin_lock(&clp
->cl_lock
);
2583 if (time_before(clp
->cl_last_renewal
,timestamp
))
2584 clp
->cl_last_renewal
= timestamp
;
2585 spin_unlock(&clp
->cl_lock
);
2588 static const struct rpc_call_ops nfs4_renew_ops
= {
2589 .rpc_call_done
= nfs4_renew_done
,
2592 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2594 struct rpc_message msg
= {
2595 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2600 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2601 &nfs4_renew_ops
, (void *)jiffies
);
2604 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2606 struct rpc_message msg
= {
2607 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2611 unsigned long now
= jiffies
;
2614 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2617 spin_lock(&clp
->cl_lock
);
2618 if (time_before(clp
->cl_last_renewal
,now
))
2619 clp
->cl_last_renewal
= now
;
2620 spin_unlock(&clp
->cl_lock
);
2624 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2626 return (server
->caps
& NFS_CAP_ACLS
)
2627 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2628 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2631 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2632 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2635 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2637 static void buf_to_pages(const void *buf
, size_t buflen
,
2638 struct page
**pages
, unsigned int *pgbase
)
2640 const void *p
= buf
;
2642 *pgbase
= offset_in_page(buf
);
2644 while (p
< buf
+ buflen
) {
2645 *(pages
++) = virt_to_page(p
);
2646 p
+= PAGE_CACHE_SIZE
;
2650 struct nfs4_cached_acl
{
2656 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2658 struct nfs_inode
*nfsi
= NFS_I(inode
);
2660 spin_lock(&inode
->i_lock
);
2661 kfree(nfsi
->nfs4_acl
);
2662 nfsi
->nfs4_acl
= acl
;
2663 spin_unlock(&inode
->i_lock
);
2666 static void nfs4_zap_acl_attr(struct inode
*inode
)
2668 nfs4_set_cached_acl(inode
, NULL
);
2671 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2673 struct nfs_inode
*nfsi
= NFS_I(inode
);
2674 struct nfs4_cached_acl
*acl
;
2677 spin_lock(&inode
->i_lock
);
2678 acl
= nfsi
->nfs4_acl
;
2681 if (buf
== NULL
) /* user is just asking for length */
2683 if (acl
->cached
== 0)
2685 ret
= -ERANGE
; /* see getxattr(2) man page */
2686 if (acl
->len
> buflen
)
2688 memcpy(buf
, acl
->data
, acl
->len
);
2692 spin_unlock(&inode
->i_lock
);
2696 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2698 struct nfs4_cached_acl
*acl
;
2700 if (buf
&& acl_len
<= PAGE_SIZE
) {
2701 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2705 memcpy(acl
->data
, buf
, acl_len
);
2707 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2714 nfs4_set_cached_acl(inode
, acl
);
2717 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2719 struct page
*pages
[NFS4ACL_MAXPAGES
];
2720 struct nfs_getaclargs args
= {
2721 .fh
= NFS_FH(inode
),
2725 size_t resp_len
= buflen
;
2727 struct rpc_message msg
= {
2728 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2730 .rpc_resp
= &resp_len
,
2732 struct page
*localpage
= NULL
;
2735 if (buflen
< PAGE_SIZE
) {
2736 /* As long as we're doing a round trip to the server anyway,
2737 * let's be prepared for a page of acl data. */
2738 localpage
= alloc_page(GFP_KERNEL
);
2739 resp_buf
= page_address(localpage
);
2740 if (localpage
== NULL
)
2742 args
.acl_pages
[0] = localpage
;
2743 args
.acl_pgbase
= 0;
2744 resp_len
= args
.acl_len
= PAGE_SIZE
;
2747 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2749 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2752 if (resp_len
> args
.acl_len
)
2753 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2755 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2758 if (resp_len
> buflen
)
2761 memcpy(buf
, resp_buf
, resp_len
);
2766 __free_page(localpage
);
2770 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2772 struct nfs4_exception exception
= { };
2775 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2778 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2779 } while (exception
.retry
);
2783 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2785 struct nfs_server
*server
= NFS_SERVER(inode
);
2788 if (!nfs4_server_supports_acls(server
))
2790 ret
= nfs_revalidate_inode(server
, inode
);
2793 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2796 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2799 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2801 struct nfs_server
*server
= NFS_SERVER(inode
);
2802 struct page
*pages
[NFS4ACL_MAXPAGES
];
2803 struct nfs_setaclargs arg
= {
2804 .fh
= NFS_FH(inode
),
2808 struct rpc_message msg
= {
2809 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2815 if (!nfs4_server_supports_acls(server
))
2817 nfs_inode_return_delegation(inode
);
2818 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2819 ret
= rpc_call_sync(NFS_SERVER(inode
)->client
, &msg
, 0);
2821 nfs4_write_cached_acl(inode
, buf
, buflen
);
2825 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2827 struct nfs4_exception exception
= { };
2830 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2831 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2833 } while (exception
.retry
);
2838 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2840 struct nfs_client
*clp
= server
->nfs_client
;
2842 if (!clp
|| task
->tk_status
>= 0)
2844 switch(task
->tk_status
) {
2845 case -NFS4ERR_STALE_CLIENTID
:
2846 case -NFS4ERR_STALE_STATEID
:
2847 case -NFS4ERR_EXPIRED
:
2848 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2849 nfs4_schedule_state_recovery(clp
);
2850 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2851 rpc_wake_up_task(task
);
2852 task
->tk_status
= 0;
2854 case -NFS4ERR_DELAY
:
2855 nfs_inc_server_stats((struct nfs_server
*) server
,
2857 case -NFS4ERR_GRACE
:
2858 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2859 task
->tk_status
= 0;
2861 case -NFS4ERR_OLD_STATEID
:
2862 task
->tk_status
= 0;
2865 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2869 static int nfs4_wait_bit_interruptible(void *word
)
2871 if (signal_pending(current
))
2872 return -ERESTARTSYS
;
2877 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2884 rpc_clnt_sigmask(clnt
, &oldset
);
2885 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2886 nfs4_wait_bit_interruptible
,
2887 TASK_INTERRUPTIBLE
);
2888 rpc_clnt_sigunmask(clnt
, &oldset
);
2892 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2900 *timeout
= NFS4_POLL_RETRY_MIN
;
2901 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2902 *timeout
= NFS4_POLL_RETRY_MAX
;
2903 rpc_clnt_sigmask(clnt
, &oldset
);
2904 if (clnt
->cl_intr
) {
2905 schedule_timeout_interruptible(*timeout
);
2909 schedule_timeout_uninterruptible(*timeout
);
2910 rpc_clnt_sigunmask(clnt
, &oldset
);
2915 /* This is the error handling routine for processes that are allowed
2918 int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2920 struct nfs_client
*clp
= server
->nfs_client
;
2921 int ret
= errorcode
;
2923 exception
->retry
= 0;
2927 case -NFS4ERR_STALE_CLIENTID
:
2928 case -NFS4ERR_STALE_STATEID
:
2929 case -NFS4ERR_EXPIRED
:
2930 nfs4_schedule_state_recovery(clp
);
2931 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2933 exception
->retry
= 1;
2935 case -NFS4ERR_GRACE
:
2936 case -NFS4ERR_DELAY
:
2937 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2940 case -NFS4ERR_OLD_STATEID
:
2941 exception
->retry
= 1;
2943 /* We failed to handle the error */
2944 return nfs4_map_errors(ret
);
2947 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2949 nfs4_verifier sc_verifier
;
2950 struct nfs4_setclientid setclientid
= {
2951 .sc_verifier
= &sc_verifier
,
2954 struct rpc_message msg
= {
2955 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2956 .rpc_argp
= &setclientid
,
2964 p
= (u32
*)sc_verifier
.data
;
2965 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2966 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2969 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2970 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2971 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.s_addr
),
2972 cred
->cr_ops
->cr_name
,
2973 clp
->cl_id_uniquifier
);
2974 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2975 sizeof(setclientid
.sc_netid
), "tcp");
2976 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2977 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2978 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2980 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2981 if (status
!= -NFS4ERR_CLID_INUSE
)
2986 ssleep(clp
->cl_lease_time
+ 1);
2988 if (++clp
->cl_id_uniquifier
== 0)
2994 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2996 struct nfs_fsinfo fsinfo
;
2997 struct rpc_message msg
= {
2998 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3000 .rpc_resp
= &fsinfo
,
3007 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3009 spin_lock(&clp
->cl_lock
);
3010 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3011 clp
->cl_last_renewal
= now
;
3012 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
3013 spin_unlock(&clp
->cl_lock
);
3018 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3023 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3027 case -NFS4ERR_RESOURCE
:
3028 /* The IBM lawyers misread another document! */
3029 case -NFS4ERR_DELAY
:
3030 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3036 struct nfs4_delegreturndata
{
3037 struct nfs4_delegreturnargs args
;
3038 struct nfs4_delegreturnres res
;
3040 nfs4_stateid stateid
;
3041 struct rpc_cred
*cred
;
3042 unsigned long timestamp
;
3043 struct nfs_fattr fattr
;
3047 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
3049 struct nfs4_delegreturndata
*data
= calldata
;
3050 struct rpc_message msg
= {
3051 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3052 .rpc_argp
= &data
->args
,
3053 .rpc_resp
= &data
->res
,
3054 .rpc_cred
= data
->cred
,
3056 nfs_fattr_init(data
->res
.fattr
);
3057 rpc_call_setup(task
, &msg
, 0);
3060 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3062 struct nfs4_delegreturndata
*data
= calldata
;
3063 data
->rpc_status
= task
->tk_status
;
3064 if (data
->rpc_status
== 0)
3065 renew_lease(data
->res
.server
, data
->timestamp
);
3068 static void nfs4_delegreturn_release(void *calldata
)
3070 struct nfs4_delegreturndata
*data
= calldata
;
3072 put_rpccred(data
->cred
);
3076 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3077 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3078 .rpc_call_done
= nfs4_delegreturn_done
,
3079 .rpc_release
= nfs4_delegreturn_release
,
3082 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3084 struct nfs4_delegreturndata
*data
;
3085 struct nfs_server
*server
= NFS_SERVER(inode
);
3086 struct rpc_task
*task
;
3089 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3092 data
->args
.fhandle
= &data
->fh
;
3093 data
->args
.stateid
= &data
->stateid
;
3094 data
->args
.bitmask
= server
->attr_bitmask
;
3095 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3096 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3097 data
->res
.fattr
= &data
->fattr
;
3098 data
->res
.server
= server
;
3099 data
->cred
= get_rpccred(cred
);
3100 data
->timestamp
= jiffies
;
3101 data
->rpc_status
= 0;
3103 task
= rpc_run_task(NFS_CLIENT(inode
), RPC_TASK_ASYNC
, &nfs4_delegreturn_ops
, data
);
3105 return PTR_ERR(task
);
3106 status
= nfs4_wait_for_completion_rpc_task(task
);
3108 status
= data
->rpc_status
;
3110 nfs_post_op_update_inode(inode
, &data
->fattr
);
3112 rpc_release_task(task
);
3116 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3118 struct nfs_server
*server
= NFS_SERVER(inode
);
3119 struct nfs4_exception exception
= { };
3122 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3124 case -NFS4ERR_STALE_STATEID
:
3125 case -NFS4ERR_EXPIRED
:
3126 nfs4_schedule_state_recovery(server
->nfs_client
);
3130 err
= nfs4_handle_exception(server
, err
, &exception
);
3131 } while (exception
.retry
);
3135 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3136 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3139 * sleep, with exponential backoff, and retry the LOCK operation.
3141 static unsigned long
3142 nfs4_set_lock_task_retry(unsigned long timeout
)
3144 schedule_timeout_interruptible(timeout
);
3146 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3147 return NFS4_LOCK_MAXTIMEOUT
;
3151 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3153 struct inode
*inode
= state
->inode
;
3154 struct nfs_server
*server
= NFS_SERVER(inode
);
3155 struct nfs_client
*clp
= server
->nfs_client
;
3156 struct nfs_lockt_args arg
= {
3157 .fh
= NFS_FH(inode
),
3160 struct nfs_lockt_res res
= {
3163 struct rpc_message msg
= {
3164 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3167 .rpc_cred
= state
->owner
->so_cred
,
3169 struct nfs4_lock_state
*lsp
;
3172 down_read(&clp
->cl_sem
);
3173 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3174 status
= nfs4_set_lock_state(state
, request
);
3177 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3178 arg
.lock_owner
.id
= lsp
->ls_id
;
3179 status
= rpc_call_sync(server
->client
, &msg
, 0);
3182 request
->fl_type
= F_UNLCK
;
3184 case -NFS4ERR_DENIED
:
3188 up_read(&clp
->cl_sem
);
3192 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3194 struct nfs4_exception exception
= { };
3198 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3199 _nfs4_proc_getlk(state
, cmd
, request
),
3201 } while (exception
.retry
);
3205 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3208 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3210 res
= posix_lock_file_wait(file
, fl
);
3213 res
= flock_lock_file_wait(file
, fl
);
3221 struct nfs4_unlockdata
{
3222 struct nfs_locku_args arg
;
3223 struct nfs_locku_res res
;
3224 struct nfs4_lock_state
*lsp
;
3225 struct nfs_open_context
*ctx
;
3226 struct file_lock fl
;
3227 const struct nfs_server
*server
;
3228 unsigned long timestamp
;
3231 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3232 struct nfs_open_context
*ctx
,
3233 struct nfs4_lock_state
*lsp
,
3234 struct nfs_seqid
*seqid
)
3236 struct nfs4_unlockdata
*p
;
3237 struct inode
*inode
= lsp
->ls_state
->inode
;
3239 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3242 p
->arg
.fh
= NFS_FH(inode
);
3244 p
->arg
.seqid
= seqid
;
3245 p
->arg
.stateid
= &lsp
->ls_stateid
;
3247 atomic_inc(&lsp
->ls_count
);
3248 /* Ensure we don't close file until we're done freeing locks! */
3249 p
->ctx
= get_nfs_open_context(ctx
);
3250 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3251 p
->server
= NFS_SERVER(inode
);
3255 static void nfs4_locku_release_calldata(void *data
)
3257 struct nfs4_unlockdata
*calldata
= data
;
3258 nfs_free_seqid(calldata
->arg
.seqid
);
3259 nfs4_put_lock_state(calldata
->lsp
);
3260 put_nfs_open_context(calldata
->ctx
);
3264 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3266 struct nfs4_unlockdata
*calldata
= data
;
3268 if (RPC_ASSASSINATED(task
))
3270 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3271 switch (task
->tk_status
) {
3273 memcpy(calldata
->lsp
->ls_stateid
.data
,
3274 calldata
->res
.stateid
.data
,
3275 sizeof(calldata
->lsp
->ls_stateid
.data
));
3276 renew_lease(calldata
->server
, calldata
->timestamp
);
3278 case -NFS4ERR_STALE_STATEID
:
3279 case -NFS4ERR_EXPIRED
:
3280 nfs4_schedule_state_recovery(calldata
->server
->nfs_client
);
3283 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
) {
3284 rpc_restart_call(task
);
3289 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3291 struct nfs4_unlockdata
*calldata
= data
;
3292 struct rpc_message msg
= {
3293 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3294 .rpc_argp
= &calldata
->arg
,
3295 .rpc_resp
= &calldata
->res
,
3296 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3299 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3301 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3302 /* Note: exit _without_ running nfs4_locku_done */
3303 task
->tk_action
= NULL
;
3306 calldata
->timestamp
= jiffies
;
3307 rpc_call_setup(task
, &msg
, 0);
3310 static const struct rpc_call_ops nfs4_locku_ops
= {
3311 .rpc_call_prepare
= nfs4_locku_prepare
,
3312 .rpc_call_done
= nfs4_locku_done
,
3313 .rpc_release
= nfs4_locku_release_calldata
,
3316 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3317 struct nfs_open_context
*ctx
,
3318 struct nfs4_lock_state
*lsp
,
3319 struct nfs_seqid
*seqid
)
3321 struct nfs4_unlockdata
*data
;
3323 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3325 nfs_free_seqid(seqid
);
3326 return ERR_PTR(-ENOMEM
);
3329 return rpc_run_task(NFS_CLIENT(lsp
->ls_state
->inode
), RPC_TASK_ASYNC
, &nfs4_locku_ops
, data
);
3332 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3334 struct nfs_seqid
*seqid
;
3335 struct nfs4_lock_state
*lsp
;
3336 struct rpc_task
*task
;
3339 status
= nfs4_set_lock_state(state
, request
);
3340 /* Unlock _before_ we do the RPC call */
3341 request
->fl_flags
|= FL_EXISTS
;
3342 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3346 /* Is this a delegated lock? */
3347 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3349 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3350 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3354 task
= nfs4_do_unlck(request
, request
->fl_file
->private_data
, lsp
, seqid
);
3355 status
= PTR_ERR(task
);
3358 status
= nfs4_wait_for_completion_rpc_task(task
);
3359 rpc_release_task(task
);
3364 struct nfs4_lockdata
{
3365 struct nfs_lock_args arg
;
3366 struct nfs_lock_res res
;
3367 struct nfs4_lock_state
*lsp
;
3368 struct nfs_open_context
*ctx
;
3369 struct file_lock fl
;
3370 unsigned long timestamp
;
3375 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3376 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3378 struct nfs4_lockdata
*p
;
3379 struct inode
*inode
= lsp
->ls_state
->inode
;
3380 struct nfs_server
*server
= NFS_SERVER(inode
);
3382 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3386 p
->arg
.fh
= NFS_FH(inode
);
3388 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3389 if (p
->arg
.lock_seqid
== NULL
)
3391 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3392 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3393 p
->arg
.lock_owner
.id
= lsp
->ls_id
;
3395 atomic_inc(&lsp
->ls_count
);
3396 p
->ctx
= get_nfs_open_context(ctx
);
3397 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3404 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3406 struct nfs4_lockdata
*data
= calldata
;
3407 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3408 struct nfs4_state_owner
*sp
= state
->owner
;
3409 struct rpc_message msg
= {
3410 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3411 .rpc_argp
= &data
->arg
,
3412 .rpc_resp
= &data
->res
,
3413 .rpc_cred
= sp
->so_cred
,
3416 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3418 dprintk("%s: begin!\n", __FUNCTION__
);
3419 /* Do we need to do an open_to_lock_owner? */
3420 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3421 data
->arg
.open_seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
3422 if (data
->arg
.open_seqid
== NULL
) {
3423 data
->rpc_status
= -ENOMEM
;
3424 task
->tk_action
= NULL
;
3427 data
->arg
.open_stateid
= &state
->stateid
;
3428 data
->arg
.new_lock_owner
= 1;
3430 data
->timestamp
= jiffies
;
3431 rpc_call_setup(task
, &msg
, 0);
3433 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3436 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3438 struct nfs4_lockdata
*data
= calldata
;
3440 dprintk("%s: begin!\n", __FUNCTION__
);
3442 data
->rpc_status
= task
->tk_status
;
3443 if (RPC_ASSASSINATED(task
))
3445 if (data
->arg
.new_lock_owner
!= 0) {
3446 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3447 if (data
->rpc_status
== 0)
3448 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3452 if (data
->rpc_status
== 0) {
3453 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3454 sizeof(data
->lsp
->ls_stateid
.data
));
3455 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3456 renew_lease(NFS_SERVER(data
->ctx
->dentry
->d_inode
), data
->timestamp
);
3458 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3460 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3463 static void nfs4_lock_release(void *calldata
)
3465 struct nfs4_lockdata
*data
= calldata
;
3467 dprintk("%s: begin!\n", __FUNCTION__
);
3468 if (data
->arg
.open_seqid
!= NULL
)
3469 nfs_free_seqid(data
->arg
.open_seqid
);
3470 if (data
->cancelled
!= 0) {
3471 struct rpc_task
*task
;
3472 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3473 data
->arg
.lock_seqid
);
3475 rpc_release_task(task
);
3476 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3478 nfs_free_seqid(data
->arg
.lock_seqid
);
3479 nfs4_put_lock_state(data
->lsp
);
3480 put_nfs_open_context(data
->ctx
);
3482 dprintk("%s: done!\n", __FUNCTION__
);
3485 static const struct rpc_call_ops nfs4_lock_ops
= {
3486 .rpc_call_prepare
= nfs4_lock_prepare
,
3487 .rpc_call_done
= nfs4_lock_done
,
3488 .rpc_release
= nfs4_lock_release
,
3491 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3493 struct nfs4_lockdata
*data
;
3494 struct rpc_task
*task
;
3497 dprintk("%s: begin!\n", __FUNCTION__
);
3498 data
= nfs4_alloc_lockdata(fl
, fl
->fl_file
->private_data
,
3499 fl
->fl_u
.nfs4_fl
.owner
);
3503 data
->arg
.block
= 1;
3505 data
->arg
.reclaim
= 1;
3506 task
= rpc_run_task(NFS_CLIENT(state
->inode
), RPC_TASK_ASYNC
,
3507 &nfs4_lock_ops
, data
);
3509 return PTR_ERR(task
);
3510 ret
= nfs4_wait_for_completion_rpc_task(task
);
3512 ret
= data
->rpc_status
;
3513 if (ret
== -NFS4ERR_DENIED
)
3516 data
->cancelled
= 1;
3517 rpc_release_task(task
);
3518 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3522 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3524 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3525 struct nfs4_exception exception
= { };
3529 /* Cache the lock if possible... */
3530 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3532 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3533 if (err
!= -NFS4ERR_DELAY
)
3535 nfs4_handle_exception(server
, err
, &exception
);
3536 } while (exception
.retry
);
3540 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3542 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3543 struct nfs4_exception exception
= { };
3546 err
= nfs4_set_lock_state(state
, request
);
3550 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3552 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3553 if (err
!= -NFS4ERR_DELAY
)
3555 nfs4_handle_exception(server
, err
, &exception
);
3556 } while (exception
.retry
);
3560 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3562 struct nfs_client
*clp
= state
->owner
->so_client
;
3563 unsigned char fl_flags
= request
->fl_flags
;
3566 /* Is this a delegated open? */
3567 status
= nfs4_set_lock_state(state
, request
);
3570 request
->fl_flags
|= FL_ACCESS
;
3571 status
= do_vfs_lock(request
->fl_file
, request
);
3574 down_read(&clp
->cl_sem
);
3575 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3576 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3577 /* Yes: cache locks! */
3578 down_read(&nfsi
->rwsem
);
3579 /* ...but avoid races with delegation recall... */
3580 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3581 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3582 status
= do_vfs_lock(request
->fl_file
, request
);
3583 up_read(&nfsi
->rwsem
);
3586 up_read(&nfsi
->rwsem
);
3588 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3591 /* Note: we always want to sleep here! */
3592 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3593 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3594 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3596 up_read(&clp
->cl_sem
);
3598 request
->fl_flags
= fl_flags
;
3602 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3604 struct nfs4_exception exception
= { };
3608 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3609 _nfs4_proc_setlk(state
, cmd
, request
),
3611 } while (exception
.retry
);
3616 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3618 struct nfs_open_context
*ctx
;
3619 struct nfs4_state
*state
;
3620 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3623 /* verify open state */
3624 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3627 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3631 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3633 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3636 if (request
->fl_type
== F_UNLCK
)
3637 return nfs4_proc_unlck(state
, cmd
, request
);
3640 status
= nfs4_proc_setlk(state
, cmd
, request
);
3641 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3643 timeout
= nfs4_set_lock_task_retry(timeout
);
3644 status
= -ERESTARTSYS
;
3647 } while(status
< 0);
3651 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3653 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3654 struct nfs4_exception exception
= { };
3657 err
= nfs4_set_lock_state(state
, fl
);
3661 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3662 if (err
!= -NFS4ERR_DELAY
)
3664 err
= nfs4_handle_exception(server
, err
, &exception
);
3665 } while (exception
.retry
);
3670 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3672 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3673 size_t buflen
, int flags
)
3675 struct inode
*inode
= dentry
->d_inode
;
3677 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3680 if (!S_ISREG(inode
->i_mode
) &&
3681 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3684 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3687 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3688 * and that's what we'll do for e.g. user attributes that haven't been set.
3689 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3690 * attributes in kernel-managed attribute namespaces. */
3691 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3694 struct inode
*inode
= dentry
->d_inode
;
3696 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3699 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3702 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3704 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3706 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3708 if (buf
&& buflen
< len
)
3711 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3715 int nfs4_proc_fs_locations(struct inode
*dir
, struct dentry
*dentry
,
3716 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3718 struct nfs_server
*server
= NFS_SERVER(dir
);
3720 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3721 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3723 struct nfs4_fs_locations_arg args
= {
3724 .dir_fh
= NFS_FH(dir
),
3725 .name
= &dentry
->d_name
,
3729 struct rpc_message msg
= {
3730 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3732 .rpc_resp
= fs_locations
,
3736 dprintk("%s: start\n", __FUNCTION__
);
3737 fs_locations
->fattr
.valid
= 0;
3738 fs_locations
->server
= server
;
3739 fs_locations
->nlocations
= 0;
3740 status
= rpc_call_sync(server
->client
, &msg
, 0);
3741 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3745 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3746 .recover_open
= nfs4_open_reclaim
,
3747 .recover_lock
= nfs4_lock_reclaim
,
3750 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3751 .recover_open
= nfs4_open_expired
,
3752 .recover_lock
= nfs4_lock_expired
,
3755 static struct inode_operations nfs4_file_inode_operations
= {
3756 .permission
= nfs_permission
,
3757 .getattr
= nfs_getattr
,
3758 .setattr
= nfs_setattr
,
3759 .getxattr
= nfs4_getxattr
,
3760 .setxattr
= nfs4_setxattr
,
3761 .listxattr
= nfs4_listxattr
,
3764 struct nfs_rpc_ops nfs_v4_clientops
= {
3765 .version
= 4, /* protocol version */
3766 .dentry_ops
= &nfs4_dentry_operations
,
3767 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3768 .file_inode_ops
= &nfs4_file_inode_operations
,
3769 .getroot
= nfs4_proc_get_root
,
3770 .getattr
= nfs4_proc_getattr
,
3771 .setattr
= nfs4_proc_setattr
,
3772 .lookupfh
= nfs4_proc_lookupfh
,
3773 .lookup
= nfs4_proc_lookup
,
3774 .access
= nfs4_proc_access
,
3775 .readlink
= nfs4_proc_readlink
,
3776 .read
= nfs4_proc_read
,
3777 .write
= nfs4_proc_write
,
3778 .commit
= nfs4_proc_commit
,
3779 .create
= nfs4_proc_create
,
3780 .remove
= nfs4_proc_remove
,
3781 .unlink_setup
= nfs4_proc_unlink_setup
,
3782 .unlink_done
= nfs4_proc_unlink_done
,
3783 .rename
= nfs4_proc_rename
,
3784 .link
= nfs4_proc_link
,
3785 .symlink
= nfs4_proc_symlink
,
3786 .mkdir
= nfs4_proc_mkdir
,
3787 .rmdir
= nfs4_proc_remove
,
3788 .readdir
= nfs4_proc_readdir
,
3789 .mknod
= nfs4_proc_mknod
,
3790 .statfs
= nfs4_proc_statfs
,
3791 .fsinfo
= nfs4_proc_fsinfo
,
3792 .pathconf
= nfs4_proc_pathconf
,
3793 .set_capabilities
= nfs4_server_capabilities
,
3794 .decode_dirent
= nfs4_decode_dirent
,
3795 .read_setup
= nfs4_proc_read_setup
,
3796 .read_done
= nfs4_read_done
,
3797 .write_setup
= nfs4_proc_write_setup
,
3798 .write_done
= nfs4_write_done
,
3799 .commit_setup
= nfs4_proc_commit_setup
,
3800 .commit_done
= nfs4_commit_done
,
3801 .file_open
= nfs_open
,
3802 .file_release
= nfs_release
,
3803 .lock
= nfs4_proc_lock
,
3804 .clear_acl_cache
= nfs4_zap_acl_attr
,