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 nfsd4_compound_state
*cstate
,
166 struct nfsd4_open
*open
, struct nfs4_stateowner
**replay_owner
)
169 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
170 (int)open
->op_fname
.len
, open
->op_fname
.data
,
171 open
->op_stateowner
);
173 /* This check required by spec. */
174 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
179 /* check seqid for replay. set nfs4_owner */
180 status
= nfsd4_process_open1(open
);
181 if (status
== nfserr_replay_me
) {
182 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
183 fh_put(&cstate
->current_fh
);
184 cstate
->current_fh
.fh_handle
.fh_size
= rp
->rp_openfh_len
;
185 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, rp
->rp_openfh
,
187 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
189 dprintk("nfsd4_open: replay failed"
190 " restoring previous filehandle\n");
192 status
= nfserr_replay_me
;
197 /* Openowner is now set, so sequence id will get bumped. Now we need
198 * these checks before we do any creates: */
199 status
= nfserr_grace
;
200 if (nfs4_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
202 status
= nfserr_no_grace
;
203 if (!nfs4_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
206 switch (open
->op_claim_type
) {
207 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
208 status
= nfserr_inval
;
212 case NFS4_OPEN_CLAIM_NULL
:
214 * (1) set CURRENT_FH to the file being opened,
215 * creating it if necessary, (2) set open->op_cinfo,
216 * (3) set open->op_truncate if the file is to be
217 * truncated after opening, (4) do permission checking.
219 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
224 case NFS4_OPEN_CLAIM_PREVIOUS
:
225 open
->op_stateowner
->so_confirmed
= 1;
227 * The CURRENT_FH is already set to the file being
228 * opened. (1) set open->op_cinfo, (2) set
229 * open->op_truncate if the file is to be truncated
230 * after opening, (3) do permission checking.
232 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
237 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
238 open
->op_stateowner
->so_confirmed
= 1;
239 printk("NFSD: unsupported OPEN claim type %d\n",
240 open
->op_claim_type
);
241 status
= nfserr_notsupp
;
244 printk("NFSD: Invalid OPEN claim type %d\n",
245 open
->op_claim_type
);
246 status
= nfserr_inval
;
250 * nfsd4_process_open2() does the actual opening of the file. If
251 * successful, it (1) truncates the file if open->op_truncate was
252 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
254 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
256 if (open
->op_stateowner
) {
257 nfs4_get_stateowner(open
->op_stateowner
);
258 *replay_owner
= open
->op_stateowner
;
265 * filehandle-manipulating ops.
268 nfsd4_getfh(struct nfsd4_compound_state
*cstate
, struct svc_fh
**getfh
)
270 if (!cstate
->current_fh
.fh_dentry
)
271 return nfserr_nofilehandle
;
273 *getfh
= &cstate
->current_fh
;
278 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
279 struct nfsd4_putfh
*putfh
)
281 fh_put(&cstate
->current_fh
);
282 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
283 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
285 return fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
289 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
)
293 fh_put(&cstate
->current_fh
);
294 status
= exp_pseudoroot(rqstp
->rq_client
, &cstate
->current_fh
,
300 nfsd4_restorefh(struct nfsd4_compound_state
*cstate
)
302 if (!cstate
->save_fh
.fh_dentry
)
303 return nfserr_restorefh
;
305 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
310 nfsd4_savefh(struct nfsd4_compound_state
*cstate
)
312 if (!cstate
->current_fh
.fh_dentry
)
313 return nfserr_nofilehandle
;
315 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
323 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
324 struct nfsd4_access
*access
)
326 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
329 access
->ac_resp_access
= access
->ac_req_access
;
330 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
331 &access
->ac_supported
);
335 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
336 struct nfsd4_commit
*commit
)
340 u32
*p
= (u32
*)commit
->co_verf
.data
;
341 *p
++ = nfssvc_boot
.tv_sec
;
342 *p
++ = nfssvc_boot
.tv_usec
;
344 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
346 if (status
== nfserr_symlink
)
347 status
= nfserr_inval
;
352 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
353 struct nfsd4_create
*create
)
359 fh_init(&resfh
, NFS4_FHSIZE
);
361 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, MAY_CREATE
);
362 if (status
== nfserr_symlink
)
363 status
= nfserr_notdir
;
367 switch (create
->cr_type
) {
369 /* ugh! we have to null-terminate the linktext, or
370 * vfs_symlink() will choke. it is always safe to
371 * null-terminate by brute force, since at worst we
372 * will overwrite the first byte of the create namelen
373 * in the XDR buffer, which has already been extracted
376 create
->cr_linkname
[create
->cr_linklen
] = 0;
378 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
379 create
->cr_name
, create
->cr_namelen
,
380 create
->cr_linkname
, create
->cr_linklen
,
381 &resfh
, &create
->cr_iattr
);
385 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
386 if (MAJOR(rdev
) != create
->cr_specdata1
||
387 MINOR(rdev
) != create
->cr_specdata2
)
389 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
390 create
->cr_name
, create
->cr_namelen
,
391 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
395 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
396 if (MAJOR(rdev
) != create
->cr_specdata1
||
397 MINOR(rdev
) != create
->cr_specdata2
)
399 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
400 create
->cr_name
, create
->cr_namelen
,
401 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
405 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
406 create
->cr_name
, create
->cr_namelen
,
407 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
411 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
412 create
->cr_name
, create
->cr_namelen
,
413 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
417 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
418 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
419 create
->cr_name
, create
->cr_namelen
,
420 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
424 status
= nfserr_badtype
;
428 fh_unlock(&cstate
->current_fh
);
429 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
430 fh_dup2(&cstate
->current_fh
, &resfh
);
438 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
439 struct nfsd4_getattr
*getattr
)
443 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
447 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
450 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
451 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
453 getattr
->ga_fhp
= &cstate
->current_fh
;
458 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
459 struct nfsd4_link
*link
)
461 __be32 status
= nfserr_nofilehandle
;
463 if (!cstate
->save_fh
.fh_dentry
)
465 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
466 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
468 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
473 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
)
475 struct svc_fh tmp_fh
;
478 fh_init(&tmp_fh
, NFS4_FHSIZE
);
479 if((ret
= exp_pseudoroot(rqstp
->rq_client
, &tmp_fh
,
480 &rqstp
->rq_chandle
)) != 0)
482 if (tmp_fh
.fh_dentry
== cstate
->current_fh
.fh_dentry
) {
487 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
488 "..", 2, &cstate
->current_fh
);
492 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
493 struct nfsd4_lookup
*lookup
)
495 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
496 lookup
->lo_name
, lookup
->lo_len
,
497 &cstate
->current_fh
);
501 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
502 struct nfsd4_read
*read
)
506 /* no need to check permission - this will be done in nfsd_read() */
508 read
->rd_filp
= NULL
;
509 if (read
->rd_offset
>= OFFSET_MAX
)
514 if ((status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
516 CHECK_FH
| RD_STATE
, &read
->rd_filp
))) {
517 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
521 get_file(read
->rd_filp
);
525 read
->rd_rqstp
= rqstp
;
526 read
->rd_fhp
= &cstate
->current_fh
;
531 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
532 struct nfsd4_readdir
*readdir
)
534 u64 cookie
= readdir
->rd_cookie
;
535 static const nfs4_verifier zeroverf
;
537 /* no need to check permission - this will be done in nfsd_readdir() */
539 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
542 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
543 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
545 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
546 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
547 return nfserr_bad_cookie
;
549 readdir
->rd_rqstp
= rqstp
;
550 readdir
->rd_fhp
= &cstate
->current_fh
;
555 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
556 struct nfsd4_readlink
*readlink
)
558 readlink
->rl_rqstp
= rqstp
;
559 readlink
->rl_fhp
= &cstate
->current_fh
;
564 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
565 struct nfsd4_remove
*remove
)
571 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
572 remove
->rm_name
, remove
->rm_namelen
);
573 if (status
== nfserr_symlink
)
574 return nfserr_notdir
;
576 fh_unlock(&cstate
->current_fh
);
577 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
583 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
584 struct nfsd4_rename
*rename
)
586 __be32 status
= nfserr_nofilehandle
;
588 if (!cstate
->save_fh
.fh_dentry
)
590 if (nfs4_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
591 & NFSEXP_NOSUBTREECHECK
))
593 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
594 rename
->rn_snamelen
, &cstate
->current_fh
,
595 rename
->rn_tname
, rename
->rn_tnamelen
);
597 /* the underlying filesystem returns different error's than required
598 * by NFSv4. both save_fh and current_fh have been verified.. */
599 if (status
== nfserr_isdir
)
600 status
= nfserr_exist
;
601 else if ((status
== nfserr_notdir
) &&
602 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
603 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
604 status
= nfserr_exist
;
605 else if (status
== nfserr_symlink
)
606 status
= nfserr_notdir
;
609 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
610 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
616 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
617 struct nfsd4_setattr
*setattr
)
619 __be32 status
= nfs_ok
;
621 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
623 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
624 &setattr
->sa_stateid
, CHECK_FH
| WR_STATE
, NULL
);
627 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
632 if (setattr
->sa_acl
!= NULL
)
633 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
637 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
643 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
644 struct nfsd4_write
*write
)
646 stateid_t
*stateid
= &write
->wr_stateid
;
647 struct file
*filp
= NULL
;
649 __be32 status
= nfs_ok
;
651 /* no need to check permission - this will be done in nfsd_write() */
653 if (write
->wr_offset
>= OFFSET_MAX
)
657 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
, stateid
,
658 CHECK_FH
| WR_STATE
, &filp
);
664 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
668 write
->wr_bytes_written
= write
->wr_buflen
;
669 write
->wr_how_written
= write
->wr_stable_how
;
670 p
= (u32
*)write
->wr_verifier
.data
;
671 *p
++ = nfssvc_boot
.tv_sec
;
672 *p
++ = nfssvc_boot
.tv_usec
;
674 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
675 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
676 write
->wr_buflen
, &write
->wr_how_written
);
680 if (status
== nfserr_symlink
)
681 status
= nfserr_inval
;
685 /* This routine never returns NFS_OK! If there are no other errors, it
686 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
687 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
688 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
691 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
692 struct nfsd4_verify
*verify
)
698 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
702 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
703 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
704 return nfserr_attrnotsupp
;
705 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
706 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
708 if (verify
->ve_attrlen
& 3)
712 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
714 count
= 4 + (verify
->ve_attrlen
>> 2);
715 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
717 return nfserr_resource
;
719 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
720 cstate
->current_fh
.fh_export
,
721 cstate
->current_fh
.fh_dentry
, buf
,
722 &count
, verify
->ve_bmval
,
725 /* this means that nfsd4_encode_fattr() ran out of space */
726 if (status
== nfserr_resource
&& count
== 0)
727 status
= nfserr_not_same
;
732 status
= nfserr_not_same
;
733 if (ntohl(*p
++) != verify
->ve_attrlen
)
735 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
736 status
= nfserr_same
;
747 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
752 static inline void nfsd4_increment_op_stats(u32 opnum
)
754 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
755 nfsdstats
.nfs4_opcount
[opnum
]++;
758 static void cstate_free(struct nfsd4_compound_state
*cstate
)
762 fh_put(&cstate
->current_fh
);
763 fh_put(&cstate
->save_fh
);
767 static struct nfsd4_compound_state
*cstate_alloc(void)
769 struct nfsd4_compound_state
*cstate
;
771 cstate
= kmalloc(sizeof(struct nfsd4_compound_state
), GFP_KERNEL
);
774 fh_init(&cstate
->current_fh
, NFS4_FHSIZE
);
775 fh_init(&cstate
->save_fh
, NFS4_FHSIZE
);
783 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
784 struct nfsd4_compoundargs
*args
,
785 struct nfsd4_compoundres
*resp
)
788 struct nfsd4_compound_state
*cstate
= NULL
;
789 struct nfs4_stateowner
*replay_owner
= NULL
;
793 status
= nfserr_resource
;
794 cstate
= cstate_alloc();
798 resp
->xbuf
= &rqstp
->rq_res
;
799 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+ rqstp
->rq_res
.head
[0].iov_len
;
800 resp
->tagp
= resp
->p
;
801 /* reserve space for: taglen, tag, and opcnt */
802 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
803 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
804 resp
->taglen
= args
->taglen
;
805 resp
->tag
= args
->tag
;
810 * According to RFC3010, this takes precedence over all other errors.
812 status
= nfserr_minor_vers_mismatch
;
813 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
817 while (!status
&& resp
->opcnt
< args
->opcnt
) {
818 op
= &args
->ops
[resp
->opcnt
++];
820 dprintk("nfsv4 compound op #%d: %d\n", resp
->opcnt
, op
->opnum
);
823 * The XDR decode routines may have pre-set op->status;
824 * for example, if there is a miscellaneous XDR error
825 * it will be set to nfserr_bad_xdr.
830 /* We must be able to encode a successful response to
831 * this operation, with enough room left over to encode a
832 * failed response to the next operation. If we don't
833 * have enough room, fail with ERR_RESOURCE.
835 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
836 if (slack_bytes
< COMPOUND_SLACK_SPACE
837 + COMPOUND_ERR_SLACK_SPACE
) {
838 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
839 op
->status
= nfserr_resource
;
843 /* All operations except RENEW, SETCLIENTID, RESTOREFH
844 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
845 * require a valid current filehandle
847 if (!cstate
->current_fh
.fh_dentry
) {
848 if (!((op
->opnum
== OP_PUTFH
) ||
849 (op
->opnum
== OP_PUTROOTFH
) ||
850 (op
->opnum
== OP_SETCLIENTID
) ||
851 (op
->opnum
== OP_SETCLIENTID_CONFIRM
) ||
852 (op
->opnum
== OP_RENEW
) ||
853 (op
->opnum
== OP_RESTOREFH
) ||
854 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
855 op
->status
= nfserr_nofilehandle
;
859 /* Check must be done at start of each operation, except
860 * for GETATTR and ops not listed as returning NFS4ERR_MOVED
862 else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
863 !((op
->opnum
== OP_GETATTR
) ||
864 (op
->opnum
== OP_PUTROOTFH
) ||
865 (op
->opnum
== OP_PUTPUBFH
) ||
866 (op
->opnum
== OP_RENEW
) ||
867 (op
->opnum
== OP_SETCLIENTID
) ||
868 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
869 op
->status
= nfserr_moved
;
874 op
->status
= nfsd4_access(rqstp
, cstate
,
878 op
->status
= nfsd4_close(rqstp
, cstate
,
879 &op
->u
.close
, &replay_owner
);
882 op
->status
= nfsd4_commit(rqstp
, cstate
,
886 op
->status
= nfsd4_create(rqstp
, cstate
,
890 op
->status
= nfsd4_delegreturn(rqstp
, cstate
,
894 op
->status
= nfsd4_getattr(rqstp
, cstate
,
898 op
->status
= nfsd4_getfh(cstate
, &op
->u
.getfh
);
901 op
->status
= nfsd4_link(rqstp
, cstate
, &op
->u
.link
);
904 op
->status
= nfsd4_lock(rqstp
, cstate
, &op
->u
.lock
,
908 op
->status
= nfsd4_lockt(rqstp
, cstate
, &op
->u
.lockt
);
911 op
->status
= nfsd4_locku(rqstp
, cstate
, &op
->u
.locku
,
915 op
->status
= nfsd4_lookup(rqstp
, cstate
,
919 op
->status
= nfsd4_lookupp(rqstp
, cstate
);
922 op
->status
= nfsd4_verify(rqstp
, cstate
,
924 if (op
->status
== nfserr_not_same
)
928 op
->status
= nfsd4_open(rqstp
, cstate
,
929 &op
->u
.open
, &replay_owner
);
931 case OP_OPEN_CONFIRM
:
932 op
->status
= nfsd4_open_confirm(rqstp
, cstate
,
936 case OP_OPEN_DOWNGRADE
:
937 op
->status
= nfsd4_open_downgrade(rqstp
, cstate
,
938 &op
->u
.open_downgrade
,
942 op
->status
= nfsd4_putfh(rqstp
, cstate
, &op
->u
.putfh
);
945 op
->status
= nfsd4_putrootfh(rqstp
, cstate
);
948 op
->status
= nfsd4_read(rqstp
, cstate
, &op
->u
.read
);
951 op
->status
= nfsd4_readdir(rqstp
, cstate
,
955 op
->status
= nfsd4_readlink(rqstp
, cstate
,
959 op
->status
= nfsd4_remove(rqstp
, cstate
,
963 op
->status
= nfsd4_rename(rqstp
, cstate
,
967 op
->status
= nfsd4_renew(&op
->u
.renew
);
970 op
->status
= nfsd4_restorefh(cstate
);
973 op
->status
= nfsd4_savefh(cstate
);
976 op
->status
= nfsd4_setattr(rqstp
, cstate
,
980 op
->status
= nfsd4_setclientid(rqstp
, &op
->u
.setclientid
);
982 case OP_SETCLIENTID_CONFIRM
:
983 op
->status
= nfsd4_setclientid_confirm(rqstp
, &op
->u
.setclientid_confirm
);
986 op
->status
= nfsd4_verify(rqstp
, cstate
,
988 if (op
->status
== nfserr_same
)
992 op
->status
= nfsd4_write(rqstp
, cstate
, &op
->u
.write
);
994 case OP_RELEASE_LOCKOWNER
:
995 op
->status
= nfsd4_release_lockowner(rqstp
, &op
->u
.release_lockowner
);
998 BUG_ON(op
->status
== nfs_ok
);
1003 if (op
->status
== nfserr_replay_me
) {
1004 op
->replay
= &replay_owner
->so_replay
;
1005 nfsd4_encode_replay(resp
, op
);
1006 status
= op
->status
= op
->replay
->rp_status
;
1008 nfsd4_encode_operation(resp
, op
);
1009 status
= op
->status
;
1011 if (replay_owner
&& (replay_owner
!= (void *)(-1))) {
1012 nfs4_put_stateowner(replay_owner
);
1013 replay_owner
= NULL
;
1015 /* XXX Ugh, we need to get rid of this kind of special case: */
1016 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1017 fput(op
->u
.read
.rd_filp
);
1019 nfsd4_increment_op_stats(op
->opnum
);
1023 nfsd4_release_compoundargs(args
);
1024 cstate_free(cstate
);
1028 #define nfs4svc_decode_voidargs NULL
1029 #define nfs4svc_release_void NULL
1030 #define nfsd4_voidres nfsd4_voidargs
1031 #define nfs4svc_release_compound NULL
1032 struct nfsd4_voidargs
{ int dummy
; };
1034 #define PROC(name, argt, rest, relt, cache, respsize) \
1035 { (svc_procfunc) nfsd4_proc_##name, \
1036 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1037 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1038 (kxdrproc_t) nfs4svc_release_##relt, \
1039 sizeof(struct nfsd4_##argt##args), \
1040 sizeof(struct nfsd4_##rest##res), \
1047 * TODO: At the present time, the NFSv4 server does not do XID caching
1048 * of requests. Implementing XID caching would not be a serious problem,
1049 * although it would require a mild change in interfaces since one
1050 * doesn't know whether an NFSv4 request is idempotent until after the
1051 * XDR decode. However, XID caching totally confuses pynfs (Peter
1052 * Astrand's regression testsuite for NFSv4 servers), which reuses
1053 * XID's liberally, so I've left it unimplemented until pynfs generates
1056 static struct svc_procedure nfsd_procedures4
[2] = {
1057 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1058 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1061 struct svc_version nfsd_version4
= {
1064 .vs_proc
= nfsd_procedures4
,
1065 .vs_dispatch
= nfsd_dispatch
,
1066 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,