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
)
97 fh_init(&resfh
, NFS4_FHSIZE
);
98 open
->op_truncate
= 0;
100 if (open
->op_create
) {
102 * Note: create modes (UNCHECKED,GUARDED...) are the same
105 status
= nfsd_create_v3(rqstp
, current_fh
, open
->op_fname
.data
,
106 open
->op_fname
.len
, &open
->op_iattr
,
107 &resfh
, open
->op_createmode
,
108 (u32
*)open
->op_verf
.data
, &open
->op_truncate
);
110 status
= nfsd_lookup(rqstp
, current_fh
,
111 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
112 fh_unlock(current_fh
);
117 set_change_info(&open
->op_cinfo
, current_fh
);
119 /* set reply cache */
120 fh_dup2(current_fh
, &resfh
);
121 open
->op_stateowner
->so_replay
.rp_openfh_len
= resfh
.fh_handle
.fh_size
;
122 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
123 &resfh
.fh_handle
.fh_base
, resfh
.fh_handle
.fh_size
);
125 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_NOP
);
133 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
137 /* Only reclaims from previously confirmed clients are valid */
138 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
141 /* We don't know the target directory, and therefore can not
142 * set the change info
145 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
147 /* set replay cache */
148 open
->op_stateowner
->so_replay
.rp_openfh_len
= current_fh
->fh_handle
.fh_size
;
149 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
150 ¤t_fh
->fh_handle
.fh_base
,
151 current_fh
->fh_handle
.fh_size
);
153 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
154 (open
->op_iattr
.ia_size
== 0);
156 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_OWNER_OVERRIDE
);
163 nfsd4_open(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, struct nfs4_stateowner
**replay_owner
)
166 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
167 (int)open
->op_fname
.len
, open
->op_fname
.data
,
168 open
->op_stateowner
);
170 /* This check required by spec. */
171 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
176 /* check seqid for replay. set nfs4_owner */
177 status
= nfsd4_process_open1(open
);
178 if (status
== nfserr_replay_me
) {
179 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
181 current_fh
->fh_handle
.fh_size
= rp
->rp_openfh_len
;
182 memcpy(¤t_fh
->fh_handle
.fh_base
, rp
->rp_openfh
,
184 status
= fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
186 dprintk("nfsd4_open: replay failed"
187 " restoring previous filehandle\n");
189 status
= nfserr_replay_me
;
194 /* Openowner is now set, so sequence id will get bumped. Now we need
195 * these checks before we do any creates: */
196 status
= nfserr_grace
;
197 if (nfs4_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
199 status
= nfserr_no_grace
;
200 if (!nfs4_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
203 switch (open
->op_claim_type
) {
204 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
205 status
= nfserr_inval
;
209 case NFS4_OPEN_CLAIM_NULL
:
211 * (1) set CURRENT_FH to the file being opened,
212 * creating it if necessary, (2) set open->op_cinfo,
213 * (3) set open->op_truncate if the file is to be
214 * truncated after opening, (4) do permission checking.
216 status
= do_open_lookup(rqstp
, current_fh
, open
);
220 case NFS4_OPEN_CLAIM_PREVIOUS
:
221 open
->op_stateowner
->so_confirmed
= 1;
223 * The CURRENT_FH is already set to the file being
224 * opened. (1) set open->op_cinfo, (2) set
225 * open->op_truncate if the file is to be truncated
226 * after opening, (3) do permission checking.
228 status
= do_open_fhandle(rqstp
, current_fh
, open
);
232 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
233 open
->op_stateowner
->so_confirmed
= 1;
234 printk("NFSD: unsupported OPEN claim type %d\n",
235 open
->op_claim_type
);
236 status
= nfserr_notsupp
;
239 printk("NFSD: Invalid OPEN claim type %d\n",
240 open
->op_claim_type
);
241 status
= nfserr_inval
;
245 * nfsd4_process_open2() does the actual opening of the file. If
246 * successful, it (1) truncates the file if open->op_truncate was
247 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
249 status
= nfsd4_process_open2(rqstp
, current_fh
, open
);
251 if (open
->op_stateowner
) {
252 nfs4_get_stateowner(open
->op_stateowner
);
253 *replay_owner
= open
->op_stateowner
;
260 * filehandle-manipulating ops.
263 nfsd4_getfh(struct svc_fh
*current_fh
, struct svc_fh
**getfh
)
265 if (!current_fh
->fh_dentry
)
266 return nfserr_nofilehandle
;
273 nfsd4_putfh(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_putfh
*putfh
)
276 current_fh
->fh_handle
.fh_size
= putfh
->pf_fhlen
;
277 memcpy(¤t_fh
->fh_handle
.fh_base
, putfh
->pf_fhval
, putfh
->pf_fhlen
);
278 return fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
282 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
)
287 status
= exp_pseudoroot(rqstp
->rq_client
, current_fh
,
293 nfsd4_restorefh(struct svc_fh
*current_fh
, struct svc_fh
*save_fh
)
295 if (!save_fh
->fh_dentry
)
296 return nfserr_restorefh
;
298 fh_dup2(current_fh
, save_fh
);
303 nfsd4_savefh(struct svc_fh
*current_fh
, struct svc_fh
*save_fh
)
305 if (!current_fh
->fh_dentry
)
306 return nfserr_nofilehandle
;
308 fh_dup2(save_fh
, current_fh
);
316 nfsd4_access(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_access
*access
)
318 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
321 access
->ac_resp_access
= access
->ac_req_access
;
322 return nfsd_access(rqstp
, current_fh
, &access
->ac_resp_access
, &access
->ac_supported
);
326 nfsd4_commit(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_commit
*commit
)
330 u32
*p
= (u32
*)commit
->co_verf
.data
;
331 *p
++ = nfssvc_boot
.tv_sec
;
332 *p
++ = nfssvc_boot
.tv_usec
;
334 status
= nfsd_commit(rqstp
, current_fh
, commit
->co_offset
, commit
->co_count
);
335 if (status
== nfserr_symlink
)
336 status
= nfserr_inval
;
341 nfsd4_create(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_create
*create
)
347 fh_init(&resfh
, NFS4_FHSIZE
);
349 status
= fh_verify(rqstp
, current_fh
, S_IFDIR
, MAY_CREATE
);
350 if (status
== nfserr_symlink
)
351 status
= nfserr_notdir
;
355 switch (create
->cr_type
) {
357 /* ugh! we have to null-terminate the linktext, or
358 * vfs_symlink() will choke. it is always safe to
359 * null-terminate by brute force, since at worst we
360 * will overwrite the first byte of the create namelen
361 * in the XDR buffer, which has already been extracted
364 create
->cr_linkname
[create
->cr_linklen
] = 0;
366 status
= nfsd_symlink(rqstp
, current_fh
, create
->cr_name
,
367 create
->cr_namelen
, create
->cr_linkname
,
368 create
->cr_linklen
, &resfh
, &create
->cr_iattr
);
372 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
373 if (MAJOR(rdev
) != create
->cr_specdata1
||
374 MINOR(rdev
) != create
->cr_specdata2
)
376 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
377 create
->cr_namelen
, &create
->cr_iattr
,
378 S_IFBLK
, rdev
, &resfh
);
382 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
383 if (MAJOR(rdev
) != create
->cr_specdata1
||
384 MINOR(rdev
) != create
->cr_specdata2
)
386 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
387 create
->cr_namelen
, &create
->cr_iattr
,
388 S_IFCHR
, rdev
, &resfh
);
392 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
393 create
->cr_namelen
, &create
->cr_iattr
,
394 S_IFSOCK
, 0, &resfh
);
398 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
399 create
->cr_namelen
, &create
->cr_iattr
,
404 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
405 status
= nfsd_create(rqstp
, current_fh
, create
->cr_name
,
406 create
->cr_namelen
, &create
->cr_iattr
,
411 status
= nfserr_badtype
;
415 fh_unlock(current_fh
);
416 set_change_info(&create
->cr_cinfo
, current_fh
);
417 fh_dup2(current_fh
, &resfh
);
425 nfsd4_getattr(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_getattr
*getattr
)
429 status
= fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
433 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
436 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
437 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
439 getattr
->ga_fhp
= current_fh
;
444 nfsd4_link(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
,
445 struct svc_fh
*save_fh
, struct nfsd4_link
*link
)
447 __be32 status
= nfserr_nofilehandle
;
449 if (!save_fh
->fh_dentry
)
451 status
= nfsd_link(rqstp
, current_fh
, link
->li_name
, link
->li_namelen
, save_fh
);
453 set_change_info(&link
->li_cinfo
, current_fh
);
458 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
)
460 struct svc_fh tmp_fh
;
463 fh_init(&tmp_fh
, NFS4_FHSIZE
);
464 if((ret
= exp_pseudoroot(rqstp
->rq_client
, &tmp_fh
,
465 &rqstp
->rq_chandle
)) != 0)
467 if (tmp_fh
.fh_dentry
== current_fh
->fh_dentry
) {
472 return nfsd_lookup(rqstp
, current_fh
, "..", 2, current_fh
);
476 nfsd4_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_lookup
*lookup
)
478 return nfsd_lookup(rqstp
, current_fh
, lookup
->lo_name
, lookup
->lo_len
, current_fh
);
482 nfsd4_read(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_read
*read
)
486 /* no need to check permission - this will be done in nfsd_read() */
488 read
->rd_filp
= NULL
;
489 if (read
->rd_offset
>= OFFSET_MAX
)
494 if ((status
= nfs4_preprocess_stateid_op(current_fh
, &read
->rd_stateid
,
495 CHECK_FH
| RD_STATE
, &read
->rd_filp
))) {
496 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
500 get_file(read
->rd_filp
);
504 read
->rd_rqstp
= rqstp
;
505 read
->rd_fhp
= current_fh
;
510 nfsd4_readdir(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_readdir
*readdir
)
512 u64 cookie
= readdir
->rd_cookie
;
513 static const nfs4_verifier zeroverf
;
515 /* no need to check permission - this will be done in nfsd_readdir() */
517 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
520 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
521 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
523 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
524 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
525 return nfserr_bad_cookie
;
527 readdir
->rd_rqstp
= rqstp
;
528 readdir
->rd_fhp
= current_fh
;
533 nfsd4_readlink(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_readlink
*readlink
)
535 readlink
->rl_rqstp
= rqstp
;
536 readlink
->rl_fhp
= current_fh
;
541 nfsd4_remove(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_remove
*remove
)
547 status
= nfsd_unlink(rqstp
, current_fh
, 0, remove
->rm_name
, remove
->rm_namelen
);
548 if (status
== nfserr_symlink
)
549 return nfserr_notdir
;
551 fh_unlock(current_fh
);
552 set_change_info(&remove
->rm_cinfo
, current_fh
);
558 nfsd4_rename(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
,
559 struct svc_fh
*save_fh
, struct nfsd4_rename
*rename
)
561 __be32 status
= nfserr_nofilehandle
;
563 if (!save_fh
->fh_dentry
)
565 if (nfs4_in_grace() && !(save_fh
->fh_export
->ex_flags
566 & NFSEXP_NOSUBTREECHECK
))
568 status
= nfsd_rename(rqstp
, save_fh
, rename
->rn_sname
,
569 rename
->rn_snamelen
, current_fh
,
570 rename
->rn_tname
, rename
->rn_tnamelen
);
572 /* the underlying filesystem returns different error's than required
573 * by NFSv4. both save_fh and current_fh have been verified.. */
574 if (status
== nfserr_isdir
)
575 status
= nfserr_exist
;
576 else if ((status
== nfserr_notdir
) &&
577 (S_ISDIR(save_fh
->fh_dentry
->d_inode
->i_mode
) &&
578 S_ISDIR(current_fh
->fh_dentry
->d_inode
->i_mode
)))
579 status
= nfserr_exist
;
580 else if (status
== nfserr_symlink
)
581 status
= nfserr_notdir
;
584 set_change_info(&rename
->rn_sinfo
, current_fh
);
585 set_change_info(&rename
->rn_tinfo
, save_fh
);
591 nfsd4_setattr(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_setattr
*setattr
)
593 __be32 status
= nfs_ok
;
595 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
597 status
= nfs4_preprocess_stateid_op(current_fh
,
598 &setattr
->sa_stateid
, CHECK_FH
| WR_STATE
, NULL
);
601 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
606 if (setattr
->sa_acl
!= NULL
)
607 status
= nfsd4_set_nfs4_acl(rqstp
, current_fh
, setattr
->sa_acl
);
610 status
= nfsd_setattr(rqstp
, current_fh
, &setattr
->sa_iattr
,
616 nfsd4_write(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_write
*write
)
618 stateid_t
*stateid
= &write
->wr_stateid
;
619 struct file
*filp
= NULL
;
621 __be32 status
= nfs_ok
;
623 /* no need to check permission - this will be done in nfsd_write() */
625 if (write
->wr_offset
>= OFFSET_MAX
)
629 status
= nfs4_preprocess_stateid_op(current_fh
, stateid
,
630 CHECK_FH
| WR_STATE
, &filp
);
636 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
640 write
->wr_bytes_written
= write
->wr_buflen
;
641 write
->wr_how_written
= write
->wr_stable_how
;
642 p
= (u32
*)write
->wr_verifier
.data
;
643 *p
++ = nfssvc_boot
.tv_sec
;
644 *p
++ = nfssvc_boot
.tv_usec
;
646 status
= nfsd_write(rqstp
, current_fh
, filp
, write
->wr_offset
,
647 rqstp
->rq_vec
, write
->wr_vlen
, write
->wr_buflen
,
648 &write
->wr_how_written
);
652 if (status
== nfserr_symlink
)
653 status
= nfserr_inval
;
657 /* This routine never returns NFS_OK! If there are no other errors, it
658 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
659 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
660 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
663 nfsd4_verify(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_verify
*verify
)
669 status
= fh_verify(rqstp
, current_fh
, 0, MAY_NOP
);
673 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
674 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
675 return nfserr_attrnotsupp
;
676 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
677 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
679 if (verify
->ve_attrlen
& 3)
683 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
685 count
= 4 + (verify
->ve_attrlen
>> 2);
686 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
688 return nfserr_resource
;
690 status
= nfsd4_encode_fattr(current_fh
, current_fh
->fh_export
,
691 current_fh
->fh_dentry
, buf
,
692 &count
, verify
->ve_bmval
,
695 /* this means that nfsd4_encode_fattr() ran out of space */
696 if (status
== nfserr_resource
&& count
== 0)
697 status
= nfserr_not_same
;
702 status
= nfserr_not_same
;
703 if (ntohl(*p
++) != verify
->ve_attrlen
)
705 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
706 status
= nfserr_same
;
717 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
722 static inline void nfsd4_increment_op_stats(u32 opnum
)
724 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
725 nfsdstats
.nfs4_opcount
[opnum
]++;
733 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
734 struct nfsd4_compoundargs
*args
,
735 struct nfsd4_compoundres
*resp
)
738 struct svc_fh
*current_fh
= NULL
;
739 struct svc_fh
*save_fh
= NULL
;
740 struct nfs4_stateowner
*replay_owner
= NULL
;
741 int slack_space
; /* in words, not bytes! */
744 status
= nfserr_resource
;
745 current_fh
= kmalloc(sizeof(*current_fh
), GFP_KERNEL
);
746 if (current_fh
== NULL
)
748 fh_init(current_fh
, NFS4_FHSIZE
);
749 save_fh
= kmalloc(sizeof(*save_fh
), GFP_KERNEL
);
752 fh_init(save_fh
, NFS4_FHSIZE
);
754 resp
->xbuf
= &rqstp
->rq_res
;
755 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+ rqstp
->rq_res
.head
[0].iov_len
;
756 resp
->tagp
= resp
->p
;
757 /* reserve space for: taglen, tag, and opcnt */
758 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
759 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
760 resp
->taglen
= args
->taglen
;
761 resp
->tag
= args
->tag
;
766 * According to RFC3010, this takes precedence over all other errors.
768 status
= nfserr_minor_vers_mismatch
;
769 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
773 while (!status
&& resp
->opcnt
< args
->opcnt
) {
774 op
= &args
->ops
[resp
->opcnt
++];
776 dprintk("nfsv4 compound op #%d: %d\n", resp
->opcnt
, op
->opnum
);
779 * The XDR decode routines may have pre-set op->status;
780 * for example, if there is a miscellaneous XDR error
781 * it will be set to nfserr_bad_xdr.
786 /* We must be able to encode a successful response to
787 * this operation, with enough room left over to encode a
788 * failed response to the next operation. If we don't
789 * have enough room, fail with ERR_RESOURCE.
791 /* FIXME - is slack_space *really* words, or bytes??? - neilb */
792 slack_space
= (char *)resp
->end
- (char *)resp
->p
;
793 if (slack_space
< COMPOUND_SLACK_SPACE
+ COMPOUND_ERR_SLACK_SPACE
) {
794 BUG_ON(slack_space
< COMPOUND_ERR_SLACK_SPACE
);
795 op
->status
= nfserr_resource
;
799 /* All operations except RENEW, SETCLIENTID, RESTOREFH
800 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
801 * require a valid current filehandle
803 if (!current_fh
->fh_dentry
) {
804 if (!((op
->opnum
== OP_PUTFH
) ||
805 (op
->opnum
== OP_PUTROOTFH
) ||
806 (op
->opnum
== OP_SETCLIENTID
) ||
807 (op
->opnum
== OP_SETCLIENTID_CONFIRM
) ||
808 (op
->opnum
== OP_RENEW
) ||
809 (op
->opnum
== OP_RESTOREFH
) ||
810 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
811 op
->status
= nfserr_nofilehandle
;
815 /* Check must be done at start of each operation, except
816 * for GETATTR and ops not listed as returning NFS4ERR_MOVED
818 else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
819 !((op
->opnum
== OP_GETATTR
) ||
820 (op
->opnum
== OP_PUTROOTFH
) ||
821 (op
->opnum
== OP_PUTPUBFH
) ||
822 (op
->opnum
== OP_RENEW
) ||
823 (op
->opnum
== OP_SETCLIENTID
) ||
824 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
825 op
->status
= nfserr_moved
;
830 op
->status
= nfsd4_access(rqstp
, current_fh
, &op
->u
.access
);
833 op
->status
= nfsd4_close(rqstp
, current_fh
, &op
->u
.close
, &replay_owner
);
836 op
->status
= nfsd4_commit(rqstp
, current_fh
, &op
->u
.commit
);
839 op
->status
= nfsd4_create(rqstp
, current_fh
, &op
->u
.create
);
842 op
->status
= nfsd4_delegreturn(rqstp
, current_fh
, &op
->u
.delegreturn
);
845 op
->status
= nfsd4_getattr(rqstp
, current_fh
, &op
->u
.getattr
);
848 op
->status
= nfsd4_getfh(current_fh
, &op
->u
.getfh
);
851 op
->status
= nfsd4_link(rqstp
, current_fh
, save_fh
, &op
->u
.link
);
854 op
->status
= nfsd4_lock(rqstp
, current_fh
, &op
->u
.lock
, &replay_owner
);
857 op
->status
= nfsd4_lockt(rqstp
, current_fh
, &op
->u
.lockt
);
860 op
->status
= nfsd4_locku(rqstp
, current_fh
, &op
->u
.locku
, &replay_owner
);
863 op
->status
= nfsd4_lookup(rqstp
, current_fh
, &op
->u
.lookup
);
866 op
->status
= nfsd4_lookupp(rqstp
, current_fh
);
869 op
->status
= nfsd4_verify(rqstp
, current_fh
, &op
->u
.nverify
);
870 if (op
->status
== nfserr_not_same
)
874 op
->status
= nfsd4_open(rqstp
, current_fh
, &op
->u
.open
, &replay_owner
);
876 case OP_OPEN_CONFIRM
:
877 op
->status
= nfsd4_open_confirm(rqstp
, current_fh
, &op
->u
.open_confirm
, &replay_owner
);
879 case OP_OPEN_DOWNGRADE
:
880 op
->status
= nfsd4_open_downgrade(rqstp
, current_fh
, &op
->u
.open_downgrade
, &replay_owner
);
883 op
->status
= nfsd4_putfh(rqstp
, current_fh
, &op
->u
.putfh
);
886 op
->status
= nfsd4_putrootfh(rqstp
, current_fh
);
889 op
->status
= nfsd4_read(rqstp
, current_fh
, &op
->u
.read
);
892 op
->status
= nfsd4_readdir(rqstp
, current_fh
, &op
->u
.readdir
);
895 op
->status
= nfsd4_readlink(rqstp
, current_fh
, &op
->u
.readlink
);
898 op
->status
= nfsd4_remove(rqstp
, current_fh
, &op
->u
.remove
);
901 op
->status
= nfsd4_rename(rqstp
, current_fh
, save_fh
, &op
->u
.rename
);
904 op
->status
= nfsd4_renew(&op
->u
.renew
);
907 op
->status
= nfsd4_restorefh(current_fh
, save_fh
);
910 op
->status
= nfsd4_savefh(current_fh
, save_fh
);
913 op
->status
= nfsd4_setattr(rqstp
, current_fh
, &op
->u
.setattr
);
916 op
->status
= nfsd4_setclientid(rqstp
, &op
->u
.setclientid
);
918 case OP_SETCLIENTID_CONFIRM
:
919 op
->status
= nfsd4_setclientid_confirm(rqstp
, &op
->u
.setclientid_confirm
);
922 op
->status
= nfsd4_verify(rqstp
, current_fh
, &op
->u
.verify
);
923 if (op
->status
== nfserr_same
)
927 op
->status
= nfsd4_write(rqstp
, current_fh
, &op
->u
.write
);
929 case OP_RELEASE_LOCKOWNER
:
930 op
->status
= nfsd4_release_lockowner(rqstp
, &op
->u
.release_lockowner
);
933 BUG_ON(op
->status
== nfs_ok
);
938 if (op
->status
== nfserr_replay_me
) {
939 op
->replay
= &replay_owner
->so_replay
;
940 nfsd4_encode_replay(resp
, op
);
941 status
= op
->status
= op
->replay
->rp_status
;
943 nfsd4_encode_operation(resp
, op
);
946 if (replay_owner
&& (replay_owner
!= (void *)(-1))) {
947 nfs4_put_stateowner(replay_owner
);
950 /* XXX Ugh, we need to get rid of this kind of special case: */
951 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
952 fput(op
->u
.read
.rd_filp
);
954 nfsd4_increment_op_stats(op
->opnum
);
958 nfsd4_release_compoundargs(args
);
968 #define nfs4svc_decode_voidargs NULL
969 #define nfs4svc_release_void NULL
970 #define nfsd4_voidres nfsd4_voidargs
971 #define nfs4svc_release_compound NULL
972 struct nfsd4_voidargs
{ int dummy
; };
974 #define PROC(name, argt, rest, relt, cache, respsize) \
975 { (svc_procfunc) nfsd4_proc_##name, \
976 (kxdrproc_t) nfs4svc_decode_##argt##args, \
977 (kxdrproc_t) nfs4svc_encode_##rest##res, \
978 (kxdrproc_t) nfs4svc_release_##relt, \
979 sizeof(struct nfsd4_##argt##args), \
980 sizeof(struct nfsd4_##rest##res), \
987 * TODO: At the present time, the NFSv4 server does not do XID caching
988 * of requests. Implementing XID caching would not be a serious problem,
989 * although it would require a mild change in interfaces since one
990 * doesn't know whether an NFSv4 request is idempotent until after the
991 * XDR decode. However, XID caching totally confuses pynfs (Peter
992 * Astrand's regression testsuite for NFSv4 servers), which reuses
993 * XID's liberally, so I've left it unimplemented until pynfs generates
996 static struct svc_procedure nfsd_procedures4
[2] = {
997 PROC(null
, void, void, void, RC_NOCACHE
, 1),
998 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1001 struct svc_version nfsd_version4
= {
1004 .vs_proc
= nfsd_procedures4
,
1005 .vs_dispatch
= nfsd_dispatch
,
1006 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,