2 * Server-side procedures for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
36 #include <linux/slab.h>
42 #define NFSDDBG_FACILITY NFSDDBG_PROC
44 static u32 nfsd_attrmask
[] = {
45 NFSD_WRITEABLE_ATTRS_WORD0
,
46 NFSD_WRITEABLE_ATTRS_WORD1
,
47 NFSD_WRITEABLE_ATTRS_WORD2
50 static u32 nfsd41_ex_attrmask
[] = {
51 NFSD_SUPPATTR_EXCLCREAT_WORD0
,
52 NFSD_SUPPATTR_EXCLCREAT_WORD1
,
53 NFSD_SUPPATTR_EXCLCREAT_WORD2
57 check_attr_support(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
58 u32
*bmval
, u32
*writable
)
60 struct dentry
*dentry
= cstate
->current_fh
.fh_dentry
;
63 * Check about attributes are supported by the NFSv4 server or not.
64 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
66 if ((bmval
[0] & ~nfsd_suppattrs0(cstate
->minorversion
)) ||
67 (bmval
[1] & ~nfsd_suppattrs1(cstate
->minorversion
)) ||
68 (bmval
[2] & ~nfsd_suppattrs2(cstate
->minorversion
)))
69 return nfserr_attrnotsupp
;
72 * Check FATTR4_WORD0_ACL can be supported
73 * in current environment or not.
75 if (bmval
[0] & FATTR4_WORD0_ACL
) {
76 if (!IS_POSIXACL(dentry
->d_inode
))
77 return nfserr_attrnotsupp
;
81 * According to spec, read-only attributes return ERR_INVAL.
84 if ((bmval
[0] & ~writable
[0]) || (bmval
[1] & ~writable
[1]) ||
85 (bmval
[2] & ~writable
[2]))
93 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
94 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
96 __be32 status
= nfs_ok
;
98 if (open
->op_create
== NFS4_OPEN_CREATE
) {
99 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
100 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
101 status
= check_attr_support(rqstp
, cstate
,
102 open
->op_bmval
, nfsd_attrmask
);
103 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
104 status
= check_attr_support(rqstp
, cstate
,
105 open
->op_bmval
, nfsd41_ex_attrmask
);
112 is_create_with_attrs(struct nfsd4_open
*open
)
114 return open
->op_create
== NFS4_OPEN_CREATE
115 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
116 || open
->op_createmode
== NFS4_CREATE_GUARDED
117 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
121 * if error occurs when setting the acl, just clear the acl bit
122 * in the returned attr bitmap.
125 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
126 struct nfs4_acl
*acl
, u32
*bmval
)
130 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
133 * We should probably fail the whole open at this point,
134 * but we've already created the file, so it's too late;
135 * So this seems the least of evils:
137 bmval
[0] &= ~FATTR4_WORD0_ACL
;
141 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
144 dget(src
->fh_dentry
);
146 cache_get(&src
->fh_export
->h
);
151 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
155 if (open
->op_truncate
&&
156 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
159 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
160 accmode
|= NFSD_MAY_READ
;
161 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
162 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
163 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
164 accmode
|= NFSD_MAY_WRITE
;
166 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
172 do_open_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
178 fh_init(&resfh
, NFS4_FHSIZE
);
179 open
->op_truncate
= 0;
181 if (open
->op_create
) {
184 * Note: create modes (UNCHECKED,GUARDED...) are the same
187 status
= nfsd_create_v3(rqstp
, current_fh
, open
->op_fname
.data
,
188 open
->op_fname
.len
, &open
->op_iattr
,
189 &resfh
, open
->op_createmode
,
190 (u32
*)open
->op_verf
.data
,
191 &open
->op_truncate
, &created
);
194 * Following rfc 3530 14.2.16, use the returned bitmask
195 * to indicate which attributes we used to store the
198 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
199 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
200 FATTR4_WORD1_TIME_MODIFY
);
202 status
= nfsd_lookup(rqstp
, current_fh
,
203 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
204 fh_unlock(current_fh
);
209 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
210 do_set_nfs4_acl(rqstp
, &resfh
, open
->op_acl
, open
->op_bmval
);
212 set_change_info(&open
->op_cinfo
, current_fh
);
213 fh_dup2(current_fh
, &resfh
);
215 /* set reply cache */
216 fh_copy_shallow(&open
->op_stateowner
->so_replay
.rp_openfh
,
219 status
= do_open_permission(rqstp
, current_fh
, open
,
228 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
232 /* Only reclaims from previously confirmed clients are valid */
233 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
236 /* We don't know the target directory, and therefore can not
237 * set the change info
240 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
242 /* set replay cache */
243 fh_copy_shallow(&open
->op_stateowner
->so_replay
.rp_openfh
,
244 ¤t_fh
->fh_handle
);
246 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
247 (open
->op_iattr
.ia_size
== 0);
249 status
= do_open_permission(rqstp
, current_fh
, open
,
250 NFSD_MAY_OWNER_OVERRIDE
);
256 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
258 struct nfsd4_sessionid
*sid
=
259 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
261 clid
->cl_boot
= sid
->clientid
.cl_boot
;
262 clid
->cl_id
= sid
->clientid
.cl_id
;
266 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
267 struct nfsd4_open
*open
)
270 struct nfsd4_compoundres
*resp
;
272 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
273 (int)open
->op_fname
.len
, open
->op_fname
.data
,
274 open
->op_stateowner
);
276 /* This check required by spec. */
277 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
280 if (nfsd4_has_session(cstate
))
281 copy_clientid(&open
->op_clientid
, cstate
->session
);
285 /* check seqid for replay. set nfs4_owner */
286 resp
= rqstp
->rq_resp
;
287 status
= nfsd4_process_open1(&resp
->cstate
, open
);
288 if (status
== nfserr_replay_me
) {
289 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
290 fh_put(&cstate
->current_fh
);
291 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
293 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
295 dprintk("nfsd4_open: replay failed"
296 " restoring previous filehandle\n");
298 status
= nfserr_replay_me
;
303 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
307 /* Openowner is now set, so sequence id will get bumped. Now we need
308 * these checks before we do any creates: */
309 status
= nfserr_grace
;
310 if (locks_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
312 status
= nfserr_no_grace
;
313 if (!locks_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
316 switch (open
->op_claim_type
) {
317 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
318 case NFS4_OPEN_CLAIM_NULL
:
320 * (1) set CURRENT_FH to the file being opened,
321 * creating it if necessary, (2) set open->op_cinfo,
322 * (3) set open->op_truncate if the file is to be
323 * truncated after opening, (4) do permission checking.
325 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
330 case NFS4_OPEN_CLAIM_PREVIOUS
:
331 open
->op_stateowner
->so_confirmed
= 1;
333 * The CURRENT_FH is already set to the file being
334 * opened. (1) set open->op_cinfo, (2) set
335 * open->op_truncate if the file is to be truncated
336 * after opening, (3) do permission checking.
338 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
343 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
344 open
->op_stateowner
->so_confirmed
= 1;
345 dprintk("NFSD: unsupported OPEN claim type %d\n",
346 open
->op_claim_type
);
347 status
= nfserr_notsupp
;
350 dprintk("NFSD: Invalid OPEN claim type %d\n",
351 open
->op_claim_type
);
352 status
= nfserr_inval
;
356 * nfsd4_process_open2() does the actual opening of the file. If
357 * successful, it (1) truncates the file if open->op_truncate was
358 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
360 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
362 if (open
->op_stateowner
) {
363 nfs4_get_stateowner(open
->op_stateowner
);
364 cstate
->replay_owner
= open
->op_stateowner
;
371 * filehandle-manipulating ops.
374 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
375 struct svc_fh
**getfh
)
377 if (!cstate
->current_fh
.fh_dentry
)
378 return nfserr_nofilehandle
;
380 *getfh
= &cstate
->current_fh
;
385 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
386 struct nfsd4_putfh
*putfh
)
388 fh_put(&cstate
->current_fh
);
389 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
390 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
392 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
396 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
401 fh_put(&cstate
->current_fh
);
402 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
407 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
410 if (!cstate
->save_fh
.fh_dentry
)
411 return nfserr_restorefh
;
413 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
418 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
421 if (!cstate
->current_fh
.fh_dentry
)
422 return nfserr_nofilehandle
;
424 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
432 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
433 struct nfsd4_access
*access
)
435 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
438 access
->ac_resp_access
= access
->ac_req_access
;
439 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
440 &access
->ac_supported
);
444 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
445 struct nfsd4_commit
*commit
)
449 u32
*p
= (u32
*)commit
->co_verf
.data
;
450 *p
++ = nfssvc_boot
.tv_sec
;
451 *p
++ = nfssvc_boot
.tv_usec
;
453 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
455 if (status
== nfserr_symlink
)
456 status
= nfserr_inval
;
461 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
462 struct nfsd4_create
*create
)
468 fh_init(&resfh
, NFS4_FHSIZE
);
470 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
472 if (status
== nfserr_symlink
)
473 status
= nfserr_notdir
;
477 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
482 switch (create
->cr_type
) {
484 /* ugh! we have to null-terminate the linktext, or
485 * vfs_symlink() will choke. it is always safe to
486 * null-terminate by brute force, since at worst we
487 * will overwrite the first byte of the create namelen
488 * in the XDR buffer, which has already been extracted
491 create
->cr_linkname
[create
->cr_linklen
] = 0;
493 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
494 create
->cr_name
, create
->cr_namelen
,
495 create
->cr_linkname
, create
->cr_linklen
,
496 &resfh
, &create
->cr_iattr
);
500 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
501 if (MAJOR(rdev
) != create
->cr_specdata1
||
502 MINOR(rdev
) != create
->cr_specdata2
)
504 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
505 create
->cr_name
, create
->cr_namelen
,
506 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
510 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
511 if (MAJOR(rdev
) != create
->cr_specdata1
||
512 MINOR(rdev
) != create
->cr_specdata2
)
514 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
515 create
->cr_name
, create
->cr_namelen
,
516 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
520 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
521 create
->cr_name
, create
->cr_namelen
,
522 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
526 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
527 create
->cr_name
, create
->cr_namelen
,
528 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
532 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
533 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
534 create
->cr_name
, create
->cr_namelen
,
535 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
539 status
= nfserr_badtype
;
545 if (create
->cr_acl
!= NULL
)
546 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
549 fh_unlock(&cstate
->current_fh
);
550 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
551 fh_dup2(&cstate
->current_fh
, &resfh
);
558 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
559 struct nfsd4_getattr
*getattr
)
563 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
567 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
570 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
571 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
572 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
574 getattr
->ga_fhp
= &cstate
->current_fh
;
579 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
580 struct nfsd4_link
*link
)
582 __be32 status
= nfserr_nofilehandle
;
584 if (!cstate
->save_fh
.fh_dentry
)
586 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
587 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
589 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
594 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
597 struct svc_fh tmp_fh
;
600 fh_init(&tmp_fh
, NFS4_FHSIZE
);
601 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
604 if (tmp_fh
.fh_dentry
== cstate
->current_fh
.fh_dentry
) {
609 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
610 "..", 2, &cstate
->current_fh
);
614 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
615 struct nfsd4_lookup
*lookup
)
617 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
618 lookup
->lo_name
, lookup
->lo_len
,
619 &cstate
->current_fh
);
623 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
624 struct nfsd4_read
*read
)
628 /* no need to check permission - this will be done in nfsd_read() */
630 read
->rd_filp
= NULL
;
631 if (read
->rd_offset
>= OFFSET_MAX
)
636 if ((status
= nfs4_preprocess_stateid_op(cstate
, &read
->rd_stateid
,
637 RD_STATE
, &read
->rd_filp
))) {
638 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
642 get_file(read
->rd_filp
);
646 read
->rd_rqstp
= rqstp
;
647 read
->rd_fhp
= &cstate
->current_fh
;
652 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
653 struct nfsd4_readdir
*readdir
)
655 u64 cookie
= readdir
->rd_cookie
;
656 static const nfs4_verifier zeroverf
;
658 /* no need to check permission - this will be done in nfsd_readdir() */
660 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
663 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
664 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
665 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
667 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
668 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
669 return nfserr_bad_cookie
;
671 readdir
->rd_rqstp
= rqstp
;
672 readdir
->rd_fhp
= &cstate
->current_fh
;
677 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
678 struct nfsd4_readlink
*readlink
)
680 readlink
->rl_rqstp
= rqstp
;
681 readlink
->rl_fhp
= &cstate
->current_fh
;
686 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
687 struct nfsd4_remove
*remove
)
691 if (locks_in_grace())
693 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
694 remove
->rm_name
, remove
->rm_namelen
);
695 if (status
== nfserr_symlink
)
696 return nfserr_notdir
;
698 fh_unlock(&cstate
->current_fh
);
699 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
705 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
706 struct nfsd4_rename
*rename
)
708 __be32 status
= nfserr_nofilehandle
;
710 if (!cstate
->save_fh
.fh_dentry
)
712 if (locks_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
713 & NFSEXP_NOSUBTREECHECK
))
715 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
716 rename
->rn_snamelen
, &cstate
->current_fh
,
717 rename
->rn_tname
, rename
->rn_tnamelen
);
719 /* the underlying filesystem returns different error's than required
720 * by NFSv4. both save_fh and current_fh have been verified.. */
721 if (status
== nfserr_isdir
)
722 status
= nfserr_exist
;
723 else if ((status
== nfserr_notdir
) &&
724 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
725 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
726 status
= nfserr_exist
;
727 else if (status
== nfserr_symlink
)
728 status
= nfserr_notdir
;
731 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
732 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
738 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
739 struct nfsd4_secinfo
*secinfo
)
742 struct svc_export
*exp
;
743 struct dentry
*dentry
;
746 fh_init(&resfh
, NFS4_FHSIZE
);
747 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
748 secinfo
->si_name
, secinfo
->si_namelen
,
752 if (dentry
->d_inode
== NULL
) {
756 secinfo
->si_exp
= exp
;
762 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
763 struct nfsd4_setattr
*setattr
)
765 __be32 status
= nfs_ok
;
767 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
769 status
= nfs4_preprocess_stateid_op(cstate
,
770 &setattr
->sa_stateid
, WR_STATE
, NULL
);
773 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
777 status
= mnt_want_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
782 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
787 if (setattr
->sa_acl
!= NULL
)
788 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
792 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
795 mnt_drop_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
800 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
801 struct nfsd4_write
*write
)
803 stateid_t
*stateid
= &write
->wr_stateid
;
804 struct file
*filp
= NULL
;
806 __be32 status
= nfs_ok
;
809 /* no need to check permission - this will be done in nfsd_write() */
811 if (write
->wr_offset
>= OFFSET_MAX
)
815 status
= nfs4_preprocess_stateid_op(cstate
, stateid
, WR_STATE
, &filp
);
821 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
825 cnt
= write
->wr_buflen
;
826 write
->wr_how_written
= write
->wr_stable_how
;
827 p
= (u32
*)write
->wr_verifier
.data
;
828 *p
++ = nfssvc_boot
.tv_sec
;
829 *p
++ = nfssvc_boot
.tv_usec
;
831 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
832 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
833 &cnt
, &write
->wr_how_written
);
837 write
->wr_bytes_written
= cnt
;
839 if (status
== nfserr_symlink
)
840 status
= nfserr_inval
;
844 /* This routine never returns NFS_OK! If there are no other errors, it
845 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
846 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
847 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
850 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
851 struct nfsd4_verify
*verify
)
857 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
861 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
865 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
866 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
868 if (verify
->ve_attrlen
& 3)
872 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
874 count
= 4 + (verify
->ve_attrlen
>> 2);
875 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
877 return nfserr_resource
;
879 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
880 cstate
->current_fh
.fh_export
,
881 cstate
->current_fh
.fh_dentry
, buf
,
882 &count
, verify
->ve_bmval
,
885 /* this means that nfsd4_encode_fattr() ran out of space */
886 if (status
== nfserr_resource
&& count
== 0)
887 status
= nfserr_not_same
;
892 p
= buf
+ 1 + ntohl(buf
[0]);
893 status
= nfserr_not_same
;
894 if (ntohl(*p
++) != verify
->ve_attrlen
)
896 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
897 status
= nfserr_same
;
905 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
906 struct nfsd4_verify
*verify
)
910 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
911 return status
== nfserr_not_same
? nfs_ok
: status
;
915 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
916 struct nfsd4_verify
*verify
)
920 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
921 return status
== nfserr_same
? nfs_ok
: status
;
928 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
933 static inline void nfsd4_increment_op_stats(u32 opnum
)
935 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
936 nfsdstats
.nfs4_opcount
[opnum
]++;
939 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
941 enum nfsd4_op_flags
{
942 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
943 ALLOWED_ON_ABSENT_FS
= 2 << 0, /* ops processed on absent fs */
944 ALLOWED_AS_FIRST_OP
= 3 << 0, /* ops reqired first in compound */
947 struct nfsd4_operation
{
948 nfsd4op_func op_func
;
953 static struct nfsd4_operation nfsd4_ops
[];
955 static const char *nfsd4_op_name(unsigned opnum
);
958 * Enforce NFSv4.1 COMPOUND ordering rules:
960 * Also note, enforced elsewhere:
961 * - SEQUENCE other than as first op results in
962 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
963 * - BIND_CONN_TO_SESSION must be the only op in its compound
964 * (Will be enforced in nfsd4_bind_conn_to_session().)
965 * - DESTROY_SESSION must be the final operation in a compound, if
966 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
967 * (Enforced in nfsd4_destroy_session().)
969 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
971 struct nfsd4_op
*op
= &args
->ops
[0];
973 /* These ordering requirements don't apply to NFSv4.0: */
974 if (args
->minorversion
== 0)
976 /* This is weird, but OK, not our problem: */
977 if (args
->opcnt
== 0)
979 if (op
->status
== nfserr_op_illegal
)
981 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
982 return nfserr_op_not_in_session
;
983 if (op
->opnum
== OP_SEQUENCE
)
985 if (args
->opcnt
!= 1)
986 return nfserr_not_only_op
;
994 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
995 struct nfsd4_compoundargs
*args
,
996 struct nfsd4_compoundres
*resp
)
999 struct nfsd4_operation
*opdesc
;
1000 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1004 resp
->xbuf
= &rqstp
->rq_res
;
1005 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+
1006 rqstp
->rq_res
.head
[0].iov_len
;
1007 resp
->tagp
= resp
->p
;
1008 /* reserve space for: taglen, tag, and opcnt */
1009 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
1010 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
1011 resp
->taglen
= args
->taglen
;
1012 resp
->tag
= args
->tag
;
1014 resp
->rqstp
= rqstp
;
1015 resp
->cstate
.minorversion
= args
->minorversion
;
1016 resp
->cstate
.replay_owner
= NULL
;
1017 resp
->cstate
.session
= NULL
;
1018 fh_init(&resp
->cstate
.current_fh
, NFS4_FHSIZE
);
1019 fh_init(&resp
->cstate
.save_fh
, NFS4_FHSIZE
);
1020 /* Use the deferral mechanism only for NFSv4.0 compounds */
1021 rqstp
->rq_usedeferral
= (args
->minorversion
== 0);
1024 * According to RFC3010, this takes precedence over all other errors.
1026 status
= nfserr_minor_vers_mismatch
;
1027 if (args
->minorversion
> nfsd_supported_minorversion
)
1030 status
= nfs41_check_op_ordering(args
);
1033 op
->status
= status
;
1037 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1038 op
= &args
->ops
[resp
->opcnt
++];
1040 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1041 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1042 nfsd4_op_name(op
->opnum
));
1044 * The XDR decode routines may have pre-set op->status;
1045 * for example, if there is a miscellaneous XDR error
1046 * it will be set to nfserr_bad_xdr.
1051 /* We must be able to encode a successful response to
1052 * this operation, with enough room left over to encode a
1053 * failed response to the next operation. If we don't
1054 * have enough room, fail with ERR_RESOURCE.
1056 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
1057 if (slack_bytes
< COMPOUND_SLACK_SPACE
1058 + COMPOUND_ERR_SLACK_SPACE
) {
1059 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
1060 op
->status
= nfserr_resource
;
1064 opdesc
= &nfsd4_ops
[op
->opnum
];
1066 if (!cstate
->current_fh
.fh_dentry
) {
1067 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1068 op
->status
= nfserr_nofilehandle
;
1071 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
1072 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1073 op
->status
= nfserr_moved
;
1077 if (opdesc
->op_func
)
1078 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1080 BUG_ON(op
->status
== nfs_ok
);
1083 /* Only from SEQUENCE */
1084 if (resp
->cstate
.status
== nfserr_replay_cache
) {
1085 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1086 status
= op
->status
;
1089 if (op
->status
== nfserr_replay_me
) {
1090 op
->replay
= &cstate
->replay_owner
->so_replay
;
1091 nfsd4_encode_replay(resp
, op
);
1092 status
= op
->status
= op
->replay
->rp_status
;
1094 nfsd4_encode_operation(resp
, op
);
1095 status
= op
->status
;
1098 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1099 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1100 be32_to_cpu(status
));
1102 if (cstate
->replay_owner
) {
1103 nfs4_put_stateowner(cstate
->replay_owner
);
1104 cstate
->replay_owner
= NULL
;
1106 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1107 fput(op
->u
.read
.rd_filp
);
1109 nfsd4_increment_op_stats(op
->opnum
);
1111 if (!rqstp
->rq_usedeferral
&& status
== nfserr_dropit
) {
1112 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__
);
1113 status
= nfserr_jukebox
;
1116 resp
->cstate
.status
= status
;
1117 fh_put(&resp
->cstate
.current_fh
);
1118 fh_put(&resp
->cstate
.save_fh
);
1119 BUG_ON(resp
->cstate
.replay_owner
);
1121 nfsd4_release_compoundargs(args
);
1122 /* Reset deferral mechanism for RPC deferrals */
1123 rqstp
->rq_usedeferral
= 1;
1124 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1128 static struct nfsd4_operation nfsd4_ops
[] = {
1130 .op_func
= (nfsd4op_func
)nfsd4_access
,
1131 .op_name
= "OP_ACCESS",
1134 .op_func
= (nfsd4op_func
)nfsd4_close
,
1135 .op_name
= "OP_CLOSE",
1138 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1139 .op_name
= "OP_COMMIT",
1142 .op_func
= (nfsd4op_func
)nfsd4_create
,
1143 .op_name
= "OP_CREATE",
1145 [OP_DELEGRETURN
] = {
1146 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1147 .op_name
= "OP_DELEGRETURN",
1150 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1151 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1152 .op_name
= "OP_GETATTR",
1155 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1156 .op_name
= "OP_GETFH",
1159 .op_func
= (nfsd4op_func
)nfsd4_link
,
1160 .op_name
= "OP_LINK",
1163 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1164 .op_name
= "OP_LOCK",
1167 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1168 .op_name
= "OP_LOCKT",
1171 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1172 .op_name
= "OP_LOCKU",
1175 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1176 .op_name
= "OP_LOOKUP",
1179 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1180 .op_name
= "OP_LOOKUPP",
1183 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1184 .op_name
= "OP_NVERIFY",
1187 .op_func
= (nfsd4op_func
)nfsd4_open
,
1188 .op_name
= "OP_OPEN",
1190 [OP_OPEN_CONFIRM
] = {
1191 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1192 .op_name
= "OP_OPEN_CONFIRM",
1194 [OP_OPEN_DOWNGRADE
] = {
1195 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1196 .op_name
= "OP_OPEN_DOWNGRADE",
1199 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1200 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1201 .op_name
= "OP_PUTFH",
1204 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1205 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1206 .op_name
= "OP_PUTPUBFH",
1209 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1210 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1211 .op_name
= "OP_PUTROOTFH",
1214 .op_func
= (nfsd4op_func
)nfsd4_read
,
1215 .op_name
= "OP_READ",
1218 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1219 .op_name
= "OP_READDIR",
1222 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1223 .op_name
= "OP_READLINK",
1226 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1227 .op_name
= "OP_REMOVE",
1230 .op_name
= "OP_RENAME",
1231 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1234 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1235 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1236 .op_name
= "OP_RENEW",
1239 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1240 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1241 .op_name
= "OP_RESTOREFH",
1244 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1245 .op_name
= "OP_SAVEFH",
1248 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1249 .op_name
= "OP_SECINFO",
1252 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1253 .op_name
= "OP_SETATTR",
1255 [OP_SETCLIENTID
] = {
1256 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1257 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1258 .op_name
= "OP_SETCLIENTID",
1260 [OP_SETCLIENTID_CONFIRM
] = {
1261 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1262 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1263 .op_name
= "OP_SETCLIENTID_CONFIRM",
1266 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1267 .op_name
= "OP_VERIFY",
1270 .op_func
= (nfsd4op_func
)nfsd4_write
,
1271 .op_name
= "OP_WRITE",
1273 [OP_RELEASE_LOCKOWNER
] = {
1274 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1275 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1276 .op_name
= "OP_RELEASE_LOCKOWNER",
1279 /* NFSv4.1 operations */
1280 [OP_EXCHANGE_ID
] = {
1281 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1282 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1283 .op_name
= "OP_EXCHANGE_ID",
1285 [OP_CREATE_SESSION
] = {
1286 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1287 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1288 .op_name
= "OP_CREATE_SESSION",
1290 [OP_DESTROY_SESSION
] = {
1291 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1292 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1293 .op_name
= "OP_DESTROY_SESSION",
1296 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1297 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1298 .op_name
= "OP_SEQUENCE",
1300 [OP_RECLAIM_COMPLETE
] = {
1301 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1302 .op_flags
= ALLOWED_WITHOUT_FH
,
1303 .op_name
= "OP_RECLAIM_COMPLETE",
1307 static const char *nfsd4_op_name(unsigned opnum
)
1309 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1310 return nfsd4_ops
[opnum
].op_name
;
1311 return "unknown_operation";
1314 #define nfsd4_voidres nfsd4_voidargs
1315 struct nfsd4_voidargs
{ int dummy
; };
1318 * TODO: At the present time, the NFSv4 server does not do XID caching
1319 * of requests. Implementing XID caching would not be a serious problem,
1320 * although it would require a mild change in interfaces since one
1321 * doesn't know whether an NFSv4 request is idempotent until after the
1322 * XDR decode. However, XID caching totally confuses pynfs (Peter
1323 * Astrand's regression testsuite for NFSv4 servers), which reuses
1324 * XID's liberally, so I've left it unimplemented until pynfs generates
1327 static struct svc_procedure nfsd_procedures4
[2] = {
1329 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
1330 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
1331 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
1332 .pc_ressize
= sizeof(struct nfsd4_voidres
),
1333 .pc_cachetype
= RC_NOCACHE
,
1336 [NFSPROC4_COMPOUND
] = {
1337 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
1338 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
1339 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
1340 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
1341 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
1342 .pc_cachetype
= RC_NOCACHE
,
1343 .pc_xdrressize
= NFSD_BUFSIZE
/4,
1347 struct svc_version nfsd_version4
= {
1350 .vs_proc
= nfsd_procedures4
,
1351 .vs_dispatch
= nfsd_dispatch
,
1352 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,