4 * Server-side procedures 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.
37 * Note: some routines in this file are just trivial wrappers
38 * (e.g. nfsd4_lookup()) defined solely for the sake of consistent
39 * naming. Since all such routines have been declared "inline",
40 * there shouldn't be any associated overhead. At some point in
41 * the future, I might inline these "by hand" to clean up a
45 #include <linux/param.h>
46 #include <linux/major.h>
47 #include <linux/slab.h>
48 #include <linux/file.h>
50 #include <linux/sunrpc/svc.h>
51 #include <linux/nfsd/nfsd.h>
52 #include <linux/nfsd/cache.h>
53 #include <linux/nfs4.h>
54 #include <linux/nfsd/state.h>
55 #include <linux/nfsd/xdr4.h>
56 #include <linux/nfs4_acl.h>
58 #define NFSDDBG_FACILITY NFSDDBG_PROC
61 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
66 cache_get(&src
->fh_export
->h
);
71 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
75 if (open
->op_truncate
&&
76 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
79 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
81 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
82 accmode
|= (MAY_WRITE
| MAY_TRUNC
);
83 if (open
->op_share_deny
& NFS4_SHARE_DENY_WRITE
)
86 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
92 do_open_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
98 fh_init(&resfh
, NFS4_FHSIZE
);
99 open
->op_truncate
= 0;
101 if (open
->op_create
) {
103 * Note: create modes (UNCHECKED,GUARDED...) are the same
106 status
= nfsd_create_v3(rqstp
, current_fh
, open
->op_fname
.data
,
107 open
->op_fname
.len
, &open
->op_iattr
,
108 &resfh
, open
->op_createmode
,
109 (u32
*)open
->op_verf
.data
, &open
->op_truncate
, &created
);
111 status
= nfsd_lookup(rqstp
, current_fh
,
112 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
113 fh_unlock(current_fh
);
118 set_change_info(&open
->op_cinfo
, current_fh
);
120 /* set reply cache */
121 fh_dup2(current_fh
, &resfh
);
122 open
->op_stateowner
->so_replay
.rp_openfh_len
= resfh
.fh_handle
.fh_size
;
123 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
124 &resfh
.fh_handle
.fh_base
, resfh
.fh_handle
.fh_size
);
127 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_NOP
);
135 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
139 /* Only reclaims from previously confirmed clients are valid */
140 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
143 /* We don't know the target directory, and therefore can not
144 * set the change info
147 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
149 /* set replay cache */
150 open
->op_stateowner
->so_replay
.rp_openfh_len
= current_fh
->fh_handle
.fh_size
;
151 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
152 ¤t_fh
->fh_handle
.fh_base
,
153 current_fh
->fh_handle
.fh_size
);
155 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
156 (open
->op_iattr
.ia_size
== 0);
158 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_OWNER_OVERRIDE
);
165 nfsd4_open(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, struct nfs4_stateowner
**replay_owner
)
168 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
169 (int)open
->op_fname
.len
, open
->op_fname
.data
,
170 open
->op_stateowner
);
172 /* This check required by spec. */
173 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
178 /* check seqid for replay. set nfs4_owner */
179 status
= nfsd4_process_open1(open
);
180 if (status
== nfserr_replay_me
) {
181 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
183 current_fh
->fh_handle
.fh_size
= rp
->rp_openfh_len
;
184 memcpy(¤t_fh
->fh_handle
.fh_base
, rp
->rp_openfh
,
186 status
= fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
188 dprintk("nfsd4_open: replay failed"
189 " restoring previous filehandle\n");
191 status
= nfserr_replay_me
;
196 /* Openowner is now set, so sequence id will get bumped. Now we need
197 * these checks before we do any creates: */
198 status
= nfserr_grace
;
199 if (nfs4_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
201 status
= nfserr_no_grace
;
202 if (!nfs4_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
205 switch (open
->op_claim_type
) {
206 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
207 status
= nfserr_inval
;
211 case NFS4_OPEN_CLAIM_NULL
:
213 * (1) set CURRENT_FH to the file being opened,
214 * creating it if necessary, (2) set open->op_cinfo,
215 * (3) set open->op_truncate if the file is to be
216 * truncated after opening, (4) do permission checking.
218 status
= do_open_lookup(rqstp
, current_fh
, open
);
222 case NFS4_OPEN_CLAIM_PREVIOUS
:
223 open
->op_stateowner
->so_confirmed
= 1;
225 * The CURRENT_FH is already set to the file being
226 * opened. (1) set open->op_cinfo, (2) set
227 * open->op_truncate if the file is to be truncated
228 * after opening, (3) do permission checking.
230 status
= do_open_fhandle(rqstp
, current_fh
, open
);
234 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
235 open
->op_stateowner
->so_confirmed
= 1;
236 printk("NFSD: unsupported OPEN claim type %d\n",
237 open
->op_claim_type
);
238 status
= nfserr_notsupp
;
241 printk("NFSD: Invalid OPEN claim type %d\n",
242 open
->op_claim_type
);
243 status
= nfserr_inval
;
247 * nfsd4_process_open2() does the actual opening of the file. If
248 * successful, it (1) truncates the file if open->op_truncate was
249 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
251 status
= nfsd4_process_open2(rqstp
, current_fh
, open
);
253 if (open
->op_stateowner
) {
254 nfs4_get_stateowner(open
->op_stateowner
);
255 *replay_owner
= open
->op_stateowner
;
262 * filehandle-manipulating ops.
265 nfsd4_getfh(struct svc_fh
*current_fh
, struct svc_fh
**getfh
)
267 if (!current_fh
->fh_dentry
)
268 return nfserr_nofilehandle
;
275 nfsd4_putfh(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_putfh
*putfh
)
278 current_fh
->fh_handle
.fh_size
= putfh
->pf_fhlen
;
279 memcpy(¤t_fh
->fh_handle
.fh_base
, putfh
->pf_fhval
, putfh
->pf_fhlen
);
280 return fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
284 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
)
289 status
= exp_pseudoroot(rqstp
->rq_client
, current_fh
,
295 nfsd4_restorefh(struct svc_fh
*current_fh
, struct svc_fh
*save_fh
)
297 if (!save_fh
->fh_dentry
)
298 return nfserr_restorefh
;
300 fh_dup2(current_fh
, save_fh
);
305 nfsd4_savefh(struct svc_fh
*current_fh
, struct svc_fh
*save_fh
)
307 if (!current_fh
->fh_dentry
)
308 return nfserr_nofilehandle
;
310 fh_dup2(save_fh
, current_fh
);
318 nfsd4_access(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_access
*access
)
320 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
323 access
->ac_resp_access
= access
->ac_req_access
;
324 return nfsd_access(rqstp
, current_fh
, &access
->ac_resp_access
, &access
->ac_supported
);
328 nfsd4_commit(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_commit
*commit
)
332 u32
*p
= (u32
*)commit
->co_verf
.data
;
333 *p
++ = nfssvc_boot
.tv_sec
;
334 *p
++ = nfssvc_boot
.tv_usec
;
336 status
= nfsd_commit(rqstp
, current_fh
, commit
->co_offset
, commit
->co_count
);
337 if (status
== nfserr_symlink
)
338 status
= nfserr_inval
;
343 nfsd4_create(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_create
*create
)
349 fh_init(&resfh
, NFS4_FHSIZE
);
351 status
= fh_verify(rqstp
, current_fh
, S_IFDIR
, MAY_CREATE
);
352 if (status
== nfserr_symlink
)
353 status
= nfserr_notdir
;
357 switch (create
->cr_type
) {
359 /* ugh! we have to null-terminate the linktext, or
360 * vfs_symlink() will choke. it is always safe to
361 * null-terminate by brute force, since at worst we
362 * will overwrite the first byte of the create namelen
363 * in the XDR buffer, which has already been extracted
366 create
->cr_linkname
[create
->cr_linklen
] = 0;
368 status
= nfsd_symlink(rqstp
, current_fh
, create
->cr_name
,
369 create
->cr_namelen
, create
->cr_linkname
,
370 create
->cr_linklen
, &resfh
, &create
->cr_iattr
);
374 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
375 if (MAJOR(rdev
) != create
->cr_specdata1
||
376 MINOR(rdev
) != create
->cr_specdata2
)
378 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
379 create
->cr_namelen
, &create
->cr_iattr
,
380 S_IFBLK
, rdev
, &resfh
);
384 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
385 if (MAJOR(rdev
) != create
->cr_specdata1
||
386 MINOR(rdev
) != create
->cr_specdata2
)
388 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
389 create
->cr_namelen
, &create
->cr_iattr
,
390 S_IFCHR
, rdev
, &resfh
);
394 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
395 create
->cr_namelen
, &create
->cr_iattr
,
396 S_IFSOCK
, 0, &resfh
);
400 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
401 create
->cr_namelen
, &create
->cr_iattr
,
406 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
407 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
408 create
->cr_namelen
, &create
->cr_iattr
,
413 status
= nfserr_badtype
;
417 fh_unlock(current_fh
);
418 set_change_info(&create
->cr_cinfo
, current_fh
);
419 fh_dup2(current_fh
, &resfh
);
427 nfsd4_getattr(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_getattr
*getattr
)
431 status
= fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
435 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
438 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
439 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
441 getattr
->ga_fhp
= current_fh
;
446 nfsd4_link(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
,
447 struct svc_fh
*save_fh
, struct nfsd4_link
*link
)
449 __be32 status
= nfserr_nofilehandle
;
451 if (!save_fh
->fh_dentry
)
453 status
= nfsd_link(rqstp
, current_fh
, link
->li_name
, link
->li_namelen
, save_fh
);
455 set_change_info(&link
->li_cinfo
, current_fh
);
460 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
)
462 struct svc_fh tmp_fh
;
465 fh_init(&tmp_fh
, NFS4_FHSIZE
);
466 if((ret
= exp_pseudoroot(rqstp
->rq_client
, &tmp_fh
,
467 &rqstp
->rq_chandle
)) != 0)
469 if (tmp_fh
.fh_dentry
== current_fh
->fh_dentry
) {
474 return nfsd_lookup(rqstp
, current_fh
, "..", 2, current_fh
);
478 nfsd4_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lookup
*lookup
)
480 return nfsd_lookup(rqstp
, current_fh
, lookup
->lo_name
, lookup
->lo_len
, current_fh
);
484 nfsd4_read(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_read
*read
)
488 /* no need to check permission - this will be done in nfsd_read() */
490 read
->rd_filp
= NULL
;
491 if (read
->rd_offset
>= OFFSET_MAX
)
496 if ((status
= nfs4_preprocess_stateid_op(current_fh
, &read
->rd_stateid
,
497 CHECK_FH
| RD_STATE
, &read
->rd_filp
))) {
498 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
502 get_file(read
->rd_filp
);
506 read
->rd_rqstp
= rqstp
;
507 read
->rd_fhp
= current_fh
;
512 nfsd4_readdir(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_readdir
*readdir
)
514 u64 cookie
= readdir
->rd_cookie
;
515 static const nfs4_verifier zeroverf
;
517 /* no need to check permission - this will be done in nfsd_readdir() */
519 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
522 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
523 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
525 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
526 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
527 return nfserr_bad_cookie
;
529 readdir
->rd_rqstp
= rqstp
;
530 readdir
->rd_fhp
= current_fh
;
535 nfsd4_readlink(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_readlink
*readlink
)
537 readlink
->rl_rqstp
= rqstp
;
538 readlink
->rl_fhp
= current_fh
;
543 nfsd4_remove(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_remove
*remove
)
549 status
= nfsd_unlink(rqstp
, current_fh
, 0, remove
->rm_name
, remove
->rm_namelen
);
550 if (status
== nfserr_symlink
)
551 return nfserr_notdir
;
553 fh_unlock(current_fh
);
554 set_change_info(&remove
->rm_cinfo
, current_fh
);
560 nfsd4_rename(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
,
561 struct svc_fh
*save_fh
, struct nfsd4_rename
*rename
)
563 __be32 status
= nfserr_nofilehandle
;
565 if (!save_fh
->fh_dentry
)
567 if (nfs4_in_grace() && !(save_fh
->fh_export
->ex_flags
568 & NFSEXP_NOSUBTREECHECK
))
570 status
= nfsd_rename(rqstp
, save_fh
, rename
->rn_sname
,
571 rename
->rn_snamelen
, current_fh
,
572 rename
->rn_tname
, rename
->rn_tnamelen
);
574 /* the underlying filesystem returns different error's than required
575 * by NFSv4. both save_fh and current_fh have been verified.. */
576 if (status
== nfserr_isdir
)
577 status
= nfserr_exist
;
578 else if ((status
== nfserr_notdir
) &&
579 (S_ISDIR(save_fh
->fh_dentry
->d_inode
->i_mode
) &&
580 S_ISDIR(current_fh
->fh_dentry
->d_inode
->i_mode
)))
581 status
= nfserr_exist
;
582 else if (status
== nfserr_symlink
)
583 status
= nfserr_notdir
;
586 set_change_info(&rename
->rn_sinfo
, current_fh
);
587 set_change_info(&rename
->rn_tinfo
, save_fh
);
593 nfsd4_setattr(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_setattr
*setattr
)
595 __be32 status
= nfs_ok
;
597 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
599 status
= nfs4_preprocess_stateid_op(current_fh
,
600 &setattr
->sa_stateid
, CHECK_FH
| WR_STATE
, NULL
);
603 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
608 if (setattr
->sa_acl
!= NULL
)
609 status
= nfsd4_set_nfs4_acl(rqstp
, current_fh
, setattr
->sa_acl
);
612 status
= nfsd_setattr(rqstp
, current_fh
, &setattr
->sa_iattr
,
618 nfsd4_write(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_write
*write
)
620 stateid_t
*stateid
= &write
->wr_stateid
;
621 struct file
*filp
= NULL
;
623 __be32 status
= nfs_ok
;
625 /* no need to check permission - this will be done in nfsd_write() */
627 if (write
->wr_offset
>= OFFSET_MAX
)
631 status
= nfs4_preprocess_stateid_op(current_fh
, stateid
,
632 CHECK_FH
| WR_STATE
, &filp
);
638 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
642 write
->wr_bytes_written
= write
->wr_buflen
;
643 write
->wr_how_written
= write
->wr_stable_how
;
644 p
= (u32
*)write
->wr_verifier
.data
;
645 *p
++ = nfssvc_boot
.tv_sec
;
646 *p
++ = nfssvc_boot
.tv_usec
;
648 status
= nfsd_write(rqstp
, current_fh
, filp
, write
->wr_offset
,
649 rqstp
->rq_vec
, write
->wr_vlen
, write
->wr_buflen
,
650 &write
->wr_how_written
);
654 if (status
== nfserr_symlink
)
655 status
= nfserr_inval
;
659 /* This routine never returns NFS_OK! If there are no other errors, it
660 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
661 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
662 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
665 nfsd4_verify(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_verify
*verify
)
671 status
= fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
675 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
676 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
677 return nfserr_attrnotsupp
;
678 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
679 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
681 if (verify
->ve_attrlen
& 3)
685 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
687 count
= 4 + (verify
->ve_attrlen
>> 2);
688 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
690 return nfserr_resource
;
692 status
= nfsd4_encode_fattr(current_fh
, current_fh
->fh_export
,
693 current_fh
->fh_dentry
, buf
,
694 &count
, verify
->ve_bmval
,
697 /* this means that nfsd4_encode_fattr() ran out of space */
698 if (status
== nfserr_resource
&& count
== 0)
699 status
= nfserr_not_same
;
704 status
= nfserr_not_same
;
705 if (ntohl(*p
++) != verify
->ve_attrlen
)
707 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
708 status
= nfserr_same
;
719 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
724 static inline void nfsd4_increment_op_stats(u32 opnum
)
726 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
727 nfsdstats
.nfs4_opcount
[opnum
]++;
735 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
736 struct nfsd4_compoundargs
*args
,
737 struct nfsd4_compoundres
*resp
)
740 struct svc_fh
*current_fh
= NULL
;
741 struct svc_fh
*save_fh
= NULL
;
742 struct nfs4_stateowner
*replay_owner
= NULL
;
743 int slack_space
; /* in words, not bytes! */
746 status
= nfserr_resource
;
747 current_fh
= kmalloc(sizeof(*current_fh
), GFP_KERNEL
);
748 if (current_fh
== NULL
)
750 fh_init(current_fh
, NFS4_FHSIZE
);
751 save_fh
= kmalloc(sizeof(*save_fh
), GFP_KERNEL
);
754 fh_init(save_fh
, NFS4_FHSIZE
);
756 resp
->xbuf
= &rqstp
->rq_res
;
757 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+ rqstp
->rq_res
.head
[0].iov_len
;
758 resp
->tagp
= resp
->p
;
759 /* reserve space for: taglen, tag, and opcnt */
760 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
761 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
762 resp
->taglen
= args
->taglen
;
763 resp
->tag
= args
->tag
;
768 * According to RFC3010, this takes precedence over all other errors.
770 status
= nfserr_minor_vers_mismatch
;
771 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
775 while (!status
&& resp
->opcnt
< args
->opcnt
) {
776 op
= &args
->ops
[resp
->opcnt
++];
778 dprintk("nfsv4 compound op #%d: %d\n", resp
->opcnt
, op
->opnum
);
781 * The XDR decode routines may have pre-set op->status;
782 * for example, if there is a miscellaneous XDR error
783 * it will be set to nfserr_bad_xdr.
788 /* We must be able to encode a successful response to
789 * this operation, with enough room left over to encode a
790 * failed response to the next operation. If we don't
791 * have enough room, fail with ERR_RESOURCE.
793 /* FIXME - is slack_space *really* words, or bytes??? - neilb */
794 slack_space
= (char *)resp
->end
- (char *)resp
->p
;
795 if (slack_space
< COMPOUND_SLACK_SPACE
+ COMPOUND_ERR_SLACK_SPACE
) {
796 BUG_ON(slack_space
< COMPOUND_ERR_SLACK_SPACE
);
797 op
->status
= nfserr_resource
;
801 /* All operations except RENEW, SETCLIENTID, RESTOREFH
802 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
803 * require a valid current filehandle
805 if (!current_fh
->fh_dentry
) {
806 if (!((op
->opnum
== OP_PUTFH
) ||
807 (op
->opnum
== OP_PUTROOTFH
) ||
808 (op
->opnum
== OP_SETCLIENTID
) ||
809 (op
->opnum
== OP_SETCLIENTID_CONFIRM
) ||
810 (op
->opnum
== OP_RENEW
) ||
811 (op
->opnum
== OP_RESTOREFH
) ||
812 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
813 op
->status
= nfserr_nofilehandle
;
817 /* Check must be done at start of each operation, except
818 * for GETATTR and ops not listed as returning NFS4ERR_MOVED
820 else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
821 !((op
->opnum
== OP_GETATTR
) ||
822 (op
->opnum
== OP_PUTROOTFH
) ||
823 (op
->opnum
== OP_PUTPUBFH
) ||
824 (op
->opnum
== OP_RENEW
) ||
825 (op
->opnum
== OP_SETCLIENTID
) ||
826 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
827 op
->status
= nfserr_moved
;
832 op
->status
= nfsd4_access(rqstp
, current_fh
, &op
->u
.access
);
835 op
->status
= nfsd4_close(rqstp
, current_fh
, &op
->u
.close
, &replay_owner
);
838 op
->status
= nfsd4_commit(rqstp
, current_fh
, &op
->u
.commit
);
841 op
->status
= nfsd4_create(rqstp
, current_fh
, &op
->u
.create
);
844 op
->status
= nfsd4_delegreturn(rqstp
, current_fh
, &op
->u
.delegreturn
);
847 op
->status
= nfsd4_getattr(rqstp
, current_fh
, &op
->u
.getattr
);
850 op
->status
= nfsd4_getfh(current_fh
, &op
->u
.getfh
);
853 op
->status
= nfsd4_link(rqstp
, current_fh
, save_fh
, &op
->u
.link
);
856 op
->status
= nfsd4_lock(rqstp
, current_fh
, &op
->u
.lock
, &replay_owner
);
859 op
->status
= nfsd4_lockt(rqstp
, current_fh
, &op
->u
.lockt
);
862 op
->status
= nfsd4_locku(rqstp
, current_fh
, &op
->u
.locku
, &replay_owner
);
865 op
->status
= nfsd4_lookup(rqstp
, current_fh
, &op
->u
.lookup
);
868 op
->status
= nfsd4_lookupp(rqstp
, current_fh
);
871 op
->status
= nfsd4_verify(rqstp
, current_fh
, &op
->u
.nverify
);
872 if (op
->status
== nfserr_not_same
)
876 op
->status
= nfsd4_open(rqstp
, current_fh
, &op
->u
.open
, &replay_owner
);
878 case OP_OPEN_CONFIRM
:
879 op
->status
= nfsd4_open_confirm(rqstp
, current_fh
, &op
->u
.open_confirm
, &replay_owner
);
881 case OP_OPEN_DOWNGRADE
:
882 op
->status
= nfsd4_open_downgrade(rqstp
, current_fh
, &op
->u
.open_downgrade
, &replay_owner
);
885 op
->status
= nfsd4_putfh(rqstp
, current_fh
, &op
->u
.putfh
);
888 op
->status
= nfsd4_putrootfh(rqstp
, current_fh
);
891 op
->status
= nfsd4_read(rqstp
, current_fh
, &op
->u
.read
);
894 op
->status
= nfsd4_readdir(rqstp
, current_fh
, &op
->u
.readdir
);
897 op
->status
= nfsd4_readlink(rqstp
, current_fh
, &op
->u
.readlink
);
900 op
->status
= nfsd4_remove(rqstp
, current_fh
, &op
->u
.remove
);
903 op
->status
= nfsd4_rename(rqstp
, current_fh
, save_fh
, &op
->u
.rename
);
906 op
->status
= nfsd4_renew(&op
->u
.renew
);
909 op
->status
= nfsd4_restorefh(current_fh
, save_fh
);
912 op
->status
= nfsd4_savefh(current_fh
, save_fh
);
915 op
->status
= nfsd4_setattr(rqstp
, current_fh
, &op
->u
.setattr
);
918 op
->status
= nfsd4_setclientid(rqstp
, &op
->u
.setclientid
);
920 case OP_SETCLIENTID_CONFIRM
:
921 op
->status
= nfsd4_setclientid_confirm(rqstp
, &op
->u
.setclientid_confirm
);
924 op
->status
= nfsd4_verify(rqstp
, current_fh
, &op
->u
.verify
);
925 if (op
->status
== nfserr_same
)
929 op
->status
= nfsd4_write(rqstp
, current_fh
, &op
->u
.write
);
931 case OP_RELEASE_LOCKOWNER
:
932 op
->status
= nfsd4_release_lockowner(rqstp
, &op
->u
.release_lockowner
);
935 BUG_ON(op
->status
== nfs_ok
);
940 if (op
->status
== nfserr_replay_me
) {
941 op
->replay
= &replay_owner
->so_replay
;
942 nfsd4_encode_replay(resp
, op
);
943 status
= op
->status
= op
->replay
->rp_status
;
945 nfsd4_encode_operation(resp
, op
);
948 if (replay_owner
&& (replay_owner
!= (void *)(-1))) {
949 nfs4_put_stateowner(replay_owner
);
952 /* XXX Ugh, we need to get rid of this kind of special case: */
953 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
954 fput(op
->u
.read
.rd_filp
);
956 nfsd4_increment_op_stats(op
->opnum
);
960 nfsd4_release_compoundargs(args
);
970 #define nfs4svc_decode_voidargs NULL
971 #define nfs4svc_release_void NULL
972 #define nfsd4_voidres nfsd4_voidargs
973 #define nfs4svc_release_compound NULL
974 struct nfsd4_voidargs
{ int dummy
; };
976 #define PROC(name, argt, rest, relt, cache, respsize) \
977 { (svc_procfunc) nfsd4_proc_##name, \
978 (kxdrproc_t) nfs4svc_decode_##argt##args, \
979 (kxdrproc_t) nfs4svc_encode_##rest##res, \
980 (kxdrproc_t) nfs4svc_release_##relt, \
981 sizeof(struct nfsd4_##argt##args), \
982 sizeof(struct nfsd4_##rest##res), \
989 * TODO: At the present time, the NFSv4 server does not do XID caching
990 * of requests. Implementing XID caching would not be a serious problem,
991 * although it would require a mild change in interfaces since one
992 * doesn't know whether an NFSv4 request is idempotent until after the
993 * XDR decode. However, XID caching totally confuses pynfs (Peter
994 * Astrand's regression testsuite for NFSv4 servers), which reuses
995 * XID's liberally, so I've left it unimplemented until pynfs generates
998 static struct svc_procedure nfsd_procedures4
[2] = {
999 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1000 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1003 struct svc_version nfsd_version4
= {
1006 .vs_proc
= nfsd_procedures4
,
1007 .vs_dispatch
= nfsd_dispatch
,
1008 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,