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
) {
182 /* FIXME: check session persistence and pnfs flags.
183 * The nfsv4.1 spec requires the following semantics:
185 * Persistent | pNFS | Server REQUIRED | Client Allowed
186 * Reply Cache | server | |
187 * -------------+--------+-----------------+--------------------
188 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
190 * | | and EXCLUSIVE4 | or EXCLUSIVE4
192 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
193 * yes | no | GUARDED4 | GUARDED4
194 * yes | yes | GUARDED4 | GUARDED4
198 * Note: create modes (UNCHECKED,GUARDED...) are the same
201 status
= nfsd_create_v3(rqstp
, current_fh
, open
->op_fname
.data
,
202 open
->op_fname
.len
, &open
->op_iattr
,
203 &resfh
, open
->op_createmode
,
204 (u32
*)open
->op_verf
.data
,
205 &open
->op_truncate
, &created
);
208 * Following rfc 3530 14.2.16, use the returned bitmask
209 * to indicate which attributes we used to store the
212 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
213 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
214 FATTR4_WORD1_TIME_MODIFY
);
216 status
= nfsd_lookup(rqstp
, current_fh
,
217 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
218 fh_unlock(current_fh
);
223 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
224 do_set_nfs4_acl(rqstp
, &resfh
, open
->op_acl
, open
->op_bmval
);
226 set_change_info(&open
->op_cinfo
, current_fh
);
227 fh_dup2(current_fh
, &resfh
);
229 /* set reply cache */
230 fh_copy_shallow(&open
->op_stateowner
->so_replay
.rp_openfh
,
233 status
= do_open_permission(rqstp
, current_fh
, open
,
242 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
246 /* Only reclaims from previously confirmed clients are valid */
247 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
250 /* We don't know the target directory, and therefore can not
251 * set the change info
254 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
256 /* set replay cache */
257 fh_copy_shallow(&open
->op_stateowner
->so_replay
.rp_openfh
,
258 ¤t_fh
->fh_handle
);
260 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
261 (open
->op_iattr
.ia_size
== 0);
263 status
= do_open_permission(rqstp
, current_fh
, open
,
264 NFSD_MAY_OWNER_OVERRIDE
);
270 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
272 struct nfsd4_sessionid
*sid
=
273 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
275 clid
->cl_boot
= sid
->clientid
.cl_boot
;
276 clid
->cl_id
= sid
->clientid
.cl_id
;
280 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
281 struct nfsd4_open
*open
)
284 struct nfsd4_compoundres
*resp
;
286 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
287 (int)open
->op_fname
.len
, open
->op_fname
.data
,
288 open
->op_stateowner
);
290 /* This check required by spec. */
291 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
294 if (nfsd4_has_session(cstate
))
295 copy_clientid(&open
->op_clientid
, cstate
->session
);
299 /* check seqid for replay. set nfs4_owner */
300 resp
= rqstp
->rq_resp
;
301 status
= nfsd4_process_open1(&resp
->cstate
, open
);
302 if (status
== nfserr_replay_me
) {
303 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
304 fh_put(&cstate
->current_fh
);
305 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
307 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
309 dprintk("nfsd4_open: replay failed"
310 " restoring previous filehandle\n");
312 status
= nfserr_replay_me
;
317 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
321 /* Openowner is now set, so sequence id will get bumped. Now we need
322 * these checks before we do any creates: */
323 status
= nfserr_grace
;
324 if (locks_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
326 status
= nfserr_no_grace
;
327 if (!locks_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
330 switch (open
->op_claim_type
) {
331 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
332 case NFS4_OPEN_CLAIM_NULL
:
334 * (1) set CURRENT_FH to the file being opened,
335 * creating it if necessary, (2) set open->op_cinfo,
336 * (3) set open->op_truncate if the file is to be
337 * truncated after opening, (4) do permission checking.
339 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
344 case NFS4_OPEN_CLAIM_PREVIOUS
:
345 open
->op_stateowner
->so_confirmed
= 1;
347 * The CURRENT_FH is already set to the file being
348 * opened. (1) set open->op_cinfo, (2) set
349 * open->op_truncate if the file is to be truncated
350 * after opening, (3) do permission checking.
352 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
357 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
358 open
->op_stateowner
->so_confirmed
= 1;
359 dprintk("NFSD: unsupported OPEN claim type %d\n",
360 open
->op_claim_type
);
361 status
= nfserr_notsupp
;
364 dprintk("NFSD: Invalid OPEN claim type %d\n",
365 open
->op_claim_type
);
366 status
= nfserr_inval
;
370 * nfsd4_process_open2() does the actual opening of the file. If
371 * successful, it (1) truncates the file if open->op_truncate was
372 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
374 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
376 if (open
->op_stateowner
) {
377 nfs4_get_stateowner(open
->op_stateowner
);
378 cstate
->replay_owner
= open
->op_stateowner
;
385 * filehandle-manipulating ops.
388 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
389 struct svc_fh
**getfh
)
391 if (!cstate
->current_fh
.fh_dentry
)
392 return nfserr_nofilehandle
;
394 *getfh
= &cstate
->current_fh
;
399 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
400 struct nfsd4_putfh
*putfh
)
402 fh_put(&cstate
->current_fh
);
403 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
404 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
406 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
410 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
415 fh_put(&cstate
->current_fh
);
416 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
421 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
424 if (!cstate
->save_fh
.fh_dentry
)
425 return nfserr_restorefh
;
427 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
432 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
435 if (!cstate
->current_fh
.fh_dentry
)
436 return nfserr_nofilehandle
;
438 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
446 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
447 struct nfsd4_access
*access
)
449 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
452 access
->ac_resp_access
= access
->ac_req_access
;
453 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
454 &access
->ac_supported
);
458 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
459 struct nfsd4_commit
*commit
)
463 u32
*p
= (u32
*)commit
->co_verf
.data
;
464 *p
++ = nfssvc_boot
.tv_sec
;
465 *p
++ = nfssvc_boot
.tv_usec
;
467 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
469 if (status
== nfserr_symlink
)
470 status
= nfserr_inval
;
475 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
476 struct nfsd4_create
*create
)
482 fh_init(&resfh
, NFS4_FHSIZE
);
484 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
486 if (status
== nfserr_symlink
)
487 status
= nfserr_notdir
;
491 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
496 switch (create
->cr_type
) {
498 /* ugh! we have to null-terminate the linktext, or
499 * vfs_symlink() will choke. it is always safe to
500 * null-terminate by brute force, since at worst we
501 * will overwrite the first byte of the create namelen
502 * in the XDR buffer, which has already been extracted
505 create
->cr_linkname
[create
->cr_linklen
] = 0;
507 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
508 create
->cr_name
, create
->cr_namelen
,
509 create
->cr_linkname
, create
->cr_linklen
,
510 &resfh
, &create
->cr_iattr
);
514 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
515 if (MAJOR(rdev
) != create
->cr_specdata1
||
516 MINOR(rdev
) != create
->cr_specdata2
)
518 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
519 create
->cr_name
, create
->cr_namelen
,
520 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
524 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
525 if (MAJOR(rdev
) != create
->cr_specdata1
||
526 MINOR(rdev
) != create
->cr_specdata2
)
528 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
529 create
->cr_name
, create
->cr_namelen
,
530 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
534 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
535 create
->cr_name
, create
->cr_namelen
,
536 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
540 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
541 create
->cr_name
, create
->cr_namelen
,
542 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
546 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
547 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
548 create
->cr_name
, create
->cr_namelen
,
549 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
553 status
= nfserr_badtype
;
559 if (create
->cr_acl
!= NULL
)
560 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
563 fh_unlock(&cstate
->current_fh
);
564 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
565 fh_dup2(&cstate
->current_fh
, &resfh
);
572 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
573 struct nfsd4_getattr
*getattr
)
577 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
581 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
584 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
585 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
586 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
588 getattr
->ga_fhp
= &cstate
->current_fh
;
593 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
594 struct nfsd4_link
*link
)
596 __be32 status
= nfserr_nofilehandle
;
598 if (!cstate
->save_fh
.fh_dentry
)
600 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
601 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
603 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
607 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
609 struct svc_fh tmp_fh
;
612 fh_init(&tmp_fh
, NFS4_FHSIZE
);
613 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
616 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
621 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
625 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
628 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
632 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
633 struct nfsd4_lookup
*lookup
)
635 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
636 lookup
->lo_name
, lookup
->lo_len
,
637 &cstate
->current_fh
);
641 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
642 struct nfsd4_read
*read
)
646 /* no need to check permission - this will be done in nfsd_read() */
648 read
->rd_filp
= NULL
;
649 if (read
->rd_offset
>= OFFSET_MAX
)
654 if ((status
= nfs4_preprocess_stateid_op(cstate
, &read
->rd_stateid
,
655 RD_STATE
, &read
->rd_filp
))) {
656 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
660 get_file(read
->rd_filp
);
664 read
->rd_rqstp
= rqstp
;
665 read
->rd_fhp
= &cstate
->current_fh
;
670 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
671 struct nfsd4_readdir
*readdir
)
673 u64 cookie
= readdir
->rd_cookie
;
674 static const nfs4_verifier zeroverf
;
676 /* no need to check permission - this will be done in nfsd_readdir() */
678 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
681 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
682 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
683 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
685 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
686 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
687 return nfserr_bad_cookie
;
689 readdir
->rd_rqstp
= rqstp
;
690 readdir
->rd_fhp
= &cstate
->current_fh
;
695 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
696 struct nfsd4_readlink
*readlink
)
698 readlink
->rl_rqstp
= rqstp
;
699 readlink
->rl_fhp
= &cstate
->current_fh
;
704 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
705 struct nfsd4_remove
*remove
)
709 if (locks_in_grace())
711 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
712 remove
->rm_name
, remove
->rm_namelen
);
713 if (status
== nfserr_symlink
)
714 return nfserr_notdir
;
716 fh_unlock(&cstate
->current_fh
);
717 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
723 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
724 struct nfsd4_rename
*rename
)
726 __be32 status
= nfserr_nofilehandle
;
728 if (!cstate
->save_fh
.fh_dentry
)
730 if (locks_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
731 & NFSEXP_NOSUBTREECHECK
))
733 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
734 rename
->rn_snamelen
, &cstate
->current_fh
,
735 rename
->rn_tname
, rename
->rn_tnamelen
);
737 /* the underlying filesystem returns different error's than required
738 * by NFSv4. both save_fh and current_fh have been verified.. */
739 if (status
== nfserr_isdir
)
740 status
= nfserr_exist
;
741 else if ((status
== nfserr_notdir
) &&
742 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
743 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
744 status
= nfserr_exist
;
745 else if (status
== nfserr_symlink
)
746 status
= nfserr_notdir
;
749 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
750 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
756 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
757 struct nfsd4_secinfo
*secinfo
)
760 struct svc_export
*exp
;
761 struct dentry
*dentry
;
764 fh_init(&resfh
, NFS4_FHSIZE
);
765 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
766 secinfo
->si_name
, secinfo
->si_namelen
,
770 if (dentry
->d_inode
== NULL
) {
774 secinfo
->si_exp
= exp
;
776 if (cstate
->minorversion
)
777 /* See rfc 5661 section 2.6.3.1.1.8 */
778 fh_put(&cstate
->current_fh
);
783 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
784 struct nfsd4_setattr
*setattr
)
786 __be32 status
= nfs_ok
;
788 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
790 status
= nfs4_preprocess_stateid_op(cstate
,
791 &setattr
->sa_stateid
, WR_STATE
, NULL
);
794 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
798 status
= mnt_want_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
803 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
808 if (setattr
->sa_acl
!= NULL
)
809 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
813 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
816 mnt_drop_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
821 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
822 struct nfsd4_write
*write
)
824 stateid_t
*stateid
= &write
->wr_stateid
;
825 struct file
*filp
= NULL
;
827 __be32 status
= nfs_ok
;
830 /* no need to check permission - this will be done in nfsd_write() */
832 if (write
->wr_offset
>= OFFSET_MAX
)
836 status
= nfs4_preprocess_stateid_op(cstate
, stateid
, WR_STATE
, &filp
);
842 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
846 cnt
= write
->wr_buflen
;
847 write
->wr_how_written
= write
->wr_stable_how
;
848 p
= (u32
*)write
->wr_verifier
.data
;
849 *p
++ = nfssvc_boot
.tv_sec
;
850 *p
++ = nfssvc_boot
.tv_usec
;
852 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
853 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
854 &cnt
, &write
->wr_how_written
);
858 write
->wr_bytes_written
= cnt
;
860 if (status
== nfserr_symlink
)
861 status
= nfserr_inval
;
865 /* This routine never returns NFS_OK! If there are no other errors, it
866 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
867 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
868 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
871 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
872 struct nfsd4_verify
*verify
)
878 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
882 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
886 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
887 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
889 if (verify
->ve_attrlen
& 3)
893 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
895 count
= 4 + (verify
->ve_attrlen
>> 2);
896 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
898 return nfserr_resource
;
900 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
901 cstate
->current_fh
.fh_export
,
902 cstate
->current_fh
.fh_dentry
, buf
,
903 &count
, verify
->ve_bmval
,
906 /* this means that nfsd4_encode_fattr() ran out of space */
907 if (status
== nfserr_resource
&& count
== 0)
908 status
= nfserr_not_same
;
913 p
= buf
+ 1 + ntohl(buf
[0]);
914 status
= nfserr_not_same
;
915 if (ntohl(*p
++) != verify
->ve_attrlen
)
917 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
918 status
= nfserr_same
;
926 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
927 struct nfsd4_verify
*verify
)
931 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
932 return status
== nfserr_not_same
? nfs_ok
: status
;
936 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
937 struct nfsd4_verify
*verify
)
941 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
942 return status
== nfserr_same
? nfs_ok
: status
;
949 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
954 static inline void nfsd4_increment_op_stats(u32 opnum
)
956 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
957 nfsdstats
.nfs4_opcount
[opnum
]++;
960 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
962 enum nfsd4_op_flags
{
963 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
964 ALLOWED_ON_ABSENT_FS
= 2 << 0, /* ops processed on absent fs */
965 ALLOWED_AS_FIRST_OP
= 3 << 0, /* ops reqired first in compound */
968 struct nfsd4_operation
{
969 nfsd4op_func op_func
;
974 static struct nfsd4_operation nfsd4_ops
[];
976 static const char *nfsd4_op_name(unsigned opnum
);
979 * Enforce NFSv4.1 COMPOUND ordering rules:
981 * Also note, enforced elsewhere:
982 * - SEQUENCE other than as first op results in
983 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
984 * - BIND_CONN_TO_SESSION must be the only op in its compound
985 * (Will be enforced in nfsd4_bind_conn_to_session().)
986 * - DESTROY_SESSION must be the final operation in a compound, if
987 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
988 * (Enforced in nfsd4_destroy_session().)
990 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
992 struct nfsd4_op
*op
= &args
->ops
[0];
994 /* These ordering requirements don't apply to NFSv4.0: */
995 if (args
->minorversion
== 0)
997 /* This is weird, but OK, not our problem: */
998 if (args
->opcnt
== 0)
1000 if (op
->status
== nfserr_op_illegal
)
1002 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1003 return nfserr_op_not_in_session
;
1004 if (op
->opnum
== OP_SEQUENCE
)
1006 if (args
->opcnt
!= 1)
1007 return nfserr_not_only_op
;
1015 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1016 struct nfsd4_compoundargs
*args
,
1017 struct nfsd4_compoundres
*resp
)
1019 struct nfsd4_op
*op
;
1020 struct nfsd4_operation
*opdesc
;
1021 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1025 resp
->xbuf
= &rqstp
->rq_res
;
1026 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+
1027 rqstp
->rq_res
.head
[0].iov_len
;
1028 resp
->tagp
= resp
->p
;
1029 /* reserve space for: taglen, tag, and opcnt */
1030 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
1031 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
1032 resp
->taglen
= args
->taglen
;
1033 resp
->tag
= args
->tag
;
1035 resp
->rqstp
= rqstp
;
1036 resp
->cstate
.minorversion
= args
->minorversion
;
1037 resp
->cstate
.replay_owner
= NULL
;
1038 resp
->cstate
.session
= NULL
;
1039 fh_init(&resp
->cstate
.current_fh
, NFS4_FHSIZE
);
1040 fh_init(&resp
->cstate
.save_fh
, NFS4_FHSIZE
);
1042 * Don't use the deferral mechanism for NFSv4; compounds make it
1043 * too hard to avoid non-idempotency problems.
1045 rqstp
->rq_usedeferral
= 0;
1048 * According to RFC3010, this takes precedence over all other errors.
1050 status
= nfserr_minor_vers_mismatch
;
1051 if (args
->minorversion
> nfsd_supported_minorversion
)
1054 status
= nfs41_check_op_ordering(args
);
1057 op
->status
= status
;
1061 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1062 op
= &args
->ops
[resp
->opcnt
++];
1064 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1065 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1066 nfsd4_op_name(op
->opnum
));
1068 * The XDR decode routines may have pre-set op->status;
1069 * for example, if there is a miscellaneous XDR error
1070 * it will be set to nfserr_bad_xdr.
1075 /* We must be able to encode a successful response to
1076 * this operation, with enough room left over to encode a
1077 * failed response to the next operation. If we don't
1078 * have enough room, fail with ERR_RESOURCE.
1080 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
1081 if (slack_bytes
< COMPOUND_SLACK_SPACE
1082 + COMPOUND_ERR_SLACK_SPACE
) {
1083 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
1084 op
->status
= nfserr_resource
;
1088 opdesc
= &nfsd4_ops
[op
->opnum
];
1090 if (!cstate
->current_fh
.fh_dentry
) {
1091 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1092 op
->status
= nfserr_nofilehandle
;
1095 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
1096 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1097 op
->status
= nfserr_moved
;
1101 if (opdesc
->op_func
)
1102 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1104 BUG_ON(op
->status
== nfs_ok
);
1107 /* Only from SEQUENCE */
1108 if (resp
->cstate
.status
== nfserr_replay_cache
) {
1109 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1110 status
= op
->status
;
1113 if (op
->status
== nfserr_replay_me
) {
1114 op
->replay
= &cstate
->replay_owner
->so_replay
;
1115 nfsd4_encode_replay(resp
, op
);
1116 status
= op
->status
= op
->replay
->rp_status
;
1118 nfsd4_encode_operation(resp
, op
);
1119 status
= op
->status
;
1122 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1123 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1124 be32_to_cpu(status
));
1126 if (cstate
->replay_owner
) {
1127 nfs4_put_stateowner(cstate
->replay_owner
);
1128 cstate
->replay_owner
= NULL
;
1130 /* XXX Ugh, we need to get rid of this kind of special case: */
1131 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1132 fput(op
->u
.read
.rd_filp
);
1134 nfsd4_increment_op_stats(op
->opnum
);
1136 if (!rqstp
->rq_usedeferral
&& status
== nfserr_dropit
) {
1137 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__
);
1138 status
= nfserr_jukebox
;
1141 resp
->cstate
.status
= status
;
1142 fh_put(&resp
->cstate
.current_fh
);
1143 fh_put(&resp
->cstate
.save_fh
);
1144 BUG_ON(resp
->cstate
.replay_owner
);
1146 nfsd4_release_compoundargs(args
);
1147 /* Reset deferral mechanism for RPC deferrals */
1148 rqstp
->rq_usedeferral
= 1;
1149 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1153 static struct nfsd4_operation nfsd4_ops
[] = {
1155 .op_func
= (nfsd4op_func
)nfsd4_access
,
1156 .op_name
= "OP_ACCESS",
1159 .op_func
= (nfsd4op_func
)nfsd4_close
,
1160 .op_name
= "OP_CLOSE",
1163 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1164 .op_name
= "OP_COMMIT",
1167 .op_func
= (nfsd4op_func
)nfsd4_create
,
1168 .op_name
= "OP_CREATE",
1170 [OP_DELEGRETURN
] = {
1171 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1172 .op_name
= "OP_DELEGRETURN",
1175 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1176 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1177 .op_name
= "OP_GETATTR",
1180 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1181 .op_name
= "OP_GETFH",
1184 .op_func
= (nfsd4op_func
)nfsd4_link
,
1185 .op_name
= "OP_LINK",
1188 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1189 .op_name
= "OP_LOCK",
1192 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1193 .op_name
= "OP_LOCKT",
1196 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1197 .op_name
= "OP_LOCKU",
1200 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1201 .op_name
= "OP_LOOKUP",
1204 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1205 .op_name
= "OP_LOOKUPP",
1208 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1209 .op_name
= "OP_NVERIFY",
1212 .op_func
= (nfsd4op_func
)nfsd4_open
,
1213 .op_name
= "OP_OPEN",
1215 [OP_OPEN_CONFIRM
] = {
1216 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1217 .op_name
= "OP_OPEN_CONFIRM",
1219 [OP_OPEN_DOWNGRADE
] = {
1220 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1221 .op_name
= "OP_OPEN_DOWNGRADE",
1224 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1225 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1226 .op_name
= "OP_PUTFH",
1229 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1230 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1231 .op_name
= "OP_PUTPUBFH",
1234 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1235 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1236 .op_name
= "OP_PUTROOTFH",
1239 .op_func
= (nfsd4op_func
)nfsd4_read
,
1240 .op_name
= "OP_READ",
1243 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1244 .op_name
= "OP_READDIR",
1247 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1248 .op_name
= "OP_READLINK",
1251 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1252 .op_name
= "OP_REMOVE",
1255 .op_name
= "OP_RENAME",
1256 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1259 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1260 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1261 .op_name
= "OP_RENEW",
1264 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1265 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1266 .op_name
= "OP_RESTOREFH",
1269 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1270 .op_name
= "OP_SAVEFH",
1273 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1274 .op_name
= "OP_SECINFO",
1277 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1278 .op_name
= "OP_SETATTR",
1280 [OP_SETCLIENTID
] = {
1281 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1282 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1283 .op_name
= "OP_SETCLIENTID",
1285 [OP_SETCLIENTID_CONFIRM
] = {
1286 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1287 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1288 .op_name
= "OP_SETCLIENTID_CONFIRM",
1291 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1292 .op_name
= "OP_VERIFY",
1295 .op_func
= (nfsd4op_func
)nfsd4_write
,
1296 .op_name
= "OP_WRITE",
1298 [OP_RELEASE_LOCKOWNER
] = {
1299 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1300 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1301 .op_name
= "OP_RELEASE_LOCKOWNER",
1304 /* NFSv4.1 operations */
1305 [OP_EXCHANGE_ID
] = {
1306 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1307 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1308 .op_name
= "OP_EXCHANGE_ID",
1310 [OP_CREATE_SESSION
] = {
1311 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1312 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1313 .op_name
= "OP_CREATE_SESSION",
1315 [OP_DESTROY_SESSION
] = {
1316 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1317 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1318 .op_name
= "OP_DESTROY_SESSION",
1321 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1322 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1323 .op_name
= "OP_SEQUENCE",
1325 [OP_RECLAIM_COMPLETE
] = {
1326 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1327 .op_flags
= ALLOWED_WITHOUT_FH
,
1328 .op_name
= "OP_RECLAIM_COMPLETE",
1332 static const char *nfsd4_op_name(unsigned opnum
)
1334 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1335 return nfsd4_ops
[opnum
].op_name
;
1336 return "unknown_operation";
1339 #define nfsd4_voidres nfsd4_voidargs
1340 struct nfsd4_voidargs
{ int dummy
; };
1343 * TODO: At the present time, the NFSv4 server does not do XID caching
1344 * of requests. Implementing XID caching would not be a serious problem,
1345 * although it would require a mild change in interfaces since one
1346 * doesn't know whether an NFSv4 request is idempotent until after the
1347 * XDR decode. However, XID caching totally confuses pynfs (Peter
1348 * Astrand's regression testsuite for NFSv4 servers), which reuses
1349 * XID's liberally, so I've left it unimplemented until pynfs generates
1352 static struct svc_procedure nfsd_procedures4
[2] = {
1354 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
1355 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
1356 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
1357 .pc_ressize
= sizeof(struct nfsd4_voidres
),
1358 .pc_cachetype
= RC_NOCACHE
,
1361 [NFSPROC4_COMPOUND
] = {
1362 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
1363 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
1364 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
1365 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
1366 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
1367 .pc_cachetype
= RC_NOCACHE
,
1368 .pc_xdrressize
= NFSD_BUFSIZE
/4,
1372 struct svc_version nfsd_version4
= {
1375 .vs_proc
= nfsd_procedures4
,
1376 .vs_dispatch
= nfsd_dispatch
,
1377 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,