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.
38 #include <linux/param.h>
39 #include <linux/major.h>
40 #include <linux/slab.h>
41 #include <linux/file.h>
43 #include <linux/sunrpc/svc.h>
44 #include <linux/nfsd/nfsd.h>
45 #include <linux/nfsd/cache.h>
46 #include <linux/nfs4.h>
47 #include <linux/nfsd/state.h>
48 #include <linux/nfsd/xdr4.h>
49 #include <linux/nfs4_acl.h>
50 #include <linux/sunrpc/gss_api.h>
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
60 cache_get(&src
->fh_export
->h
);
65 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
69 if (open
->op_truncate
&&
70 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
73 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
75 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
76 accmode
|= (MAY_WRITE
| MAY_TRUNC
);
77 if (open
->op_share_deny
& NFS4_SHARE_DENY_WRITE
)
80 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
86 do_open_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
92 fh_init(&resfh
, NFS4_FHSIZE
);
93 open
->op_truncate
= 0;
95 if (open
->op_create
) {
97 * Note: create modes (UNCHECKED,GUARDED...) are the same
100 status
= nfsd_create_v3(rqstp
, current_fh
, open
->op_fname
.data
,
101 open
->op_fname
.len
, &open
->op_iattr
,
102 &resfh
, open
->op_createmode
,
103 (u32
*)open
->op_verf
.data
, &open
->op_truncate
, &created
);
105 status
= nfsd_lookup(rqstp
, current_fh
,
106 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
107 fh_unlock(current_fh
);
112 set_change_info(&open
->op_cinfo
, current_fh
);
114 /* set reply cache */
115 fh_dup2(current_fh
, &resfh
);
116 open
->op_stateowner
->so_replay
.rp_openfh_len
= resfh
.fh_handle
.fh_size
;
117 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
118 &resfh
.fh_handle
.fh_base
, resfh
.fh_handle
.fh_size
);
121 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_NOP
);
129 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
133 /* Only reclaims from previously confirmed clients are valid */
134 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
137 /* We don't know the target directory, and therefore can not
138 * set the change info
141 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
143 /* set replay cache */
144 open
->op_stateowner
->so_replay
.rp_openfh_len
= current_fh
->fh_handle
.fh_size
;
145 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
146 ¤t_fh
->fh_handle
.fh_base
,
147 current_fh
->fh_handle
.fh_size
);
149 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
150 (open
->op_iattr
.ia_size
== 0);
152 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_OWNER_OVERRIDE
);
159 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
160 struct nfsd4_open
*open
)
163 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
164 (int)open
->op_fname
.len
, open
->op_fname
.data
,
165 open
->op_stateowner
);
167 /* This check required by spec. */
168 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
173 /* check seqid for replay. set nfs4_owner */
174 status
= nfsd4_process_open1(open
);
175 if (status
== nfserr_replay_me
) {
176 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
177 fh_put(&cstate
->current_fh
);
178 cstate
->current_fh
.fh_handle
.fh_size
= rp
->rp_openfh_len
;
179 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, rp
->rp_openfh
,
181 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
183 dprintk("nfsd4_open: replay failed"
184 " restoring previous filehandle\n");
186 status
= nfserr_replay_me
;
191 /* Openowner is now set, so sequence id will get bumped. Now we need
192 * these checks before we do any creates: */
193 status
= nfserr_grace
;
194 if (nfs4_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
196 status
= nfserr_no_grace
;
197 if (!nfs4_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
200 switch (open
->op_claim_type
) {
201 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
202 status
= nfserr_inval
;
206 case NFS4_OPEN_CLAIM_NULL
:
208 * (1) set CURRENT_FH to the file being opened,
209 * creating it if necessary, (2) set open->op_cinfo,
210 * (3) set open->op_truncate if the file is to be
211 * truncated after opening, (4) do permission checking.
213 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
218 case NFS4_OPEN_CLAIM_PREVIOUS
:
219 open
->op_stateowner
->so_confirmed
= 1;
221 * The CURRENT_FH is already set to the file being
222 * opened. (1) set open->op_cinfo, (2) set
223 * open->op_truncate if the file is to be truncated
224 * after opening, (3) do permission checking.
226 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
231 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
232 open
->op_stateowner
->so_confirmed
= 1;
233 printk("NFSD: unsupported OPEN claim type %d\n",
234 open
->op_claim_type
);
235 status
= nfserr_notsupp
;
238 printk("NFSD: Invalid OPEN claim type %d\n",
239 open
->op_claim_type
);
240 status
= nfserr_inval
;
244 * nfsd4_process_open2() does the actual opening of the file. If
245 * successful, it (1) truncates the file if open->op_truncate was
246 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
248 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
250 if (open
->op_stateowner
) {
251 nfs4_get_stateowner(open
->op_stateowner
);
252 cstate
->replay_owner
= open
->op_stateowner
;
259 * filehandle-manipulating ops.
262 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
263 struct svc_fh
**getfh
)
265 if (!cstate
->current_fh
.fh_dentry
)
266 return nfserr_nofilehandle
;
268 *getfh
= &cstate
->current_fh
;
273 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
274 struct nfsd4_putfh
*putfh
)
276 fh_put(&cstate
->current_fh
);
277 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
278 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
280 return fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
284 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
289 fh_put(&cstate
->current_fh
);
290 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
295 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
298 if (!cstate
->save_fh
.fh_dentry
)
299 return nfserr_restorefh
;
301 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
306 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
309 if (!cstate
->current_fh
.fh_dentry
)
310 return nfserr_nofilehandle
;
312 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
320 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
321 struct nfsd4_access
*access
)
323 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
326 access
->ac_resp_access
= access
->ac_req_access
;
327 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
328 &access
->ac_supported
);
332 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
333 struct nfsd4_commit
*commit
)
337 u32
*p
= (u32
*)commit
->co_verf
.data
;
338 *p
++ = nfssvc_boot
.tv_sec
;
339 *p
++ = nfssvc_boot
.tv_usec
;
341 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
343 if (status
== nfserr_symlink
)
344 status
= nfserr_inval
;
349 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
350 struct nfsd4_create
*create
)
356 fh_init(&resfh
, NFS4_FHSIZE
);
358 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, MAY_CREATE
);
359 if (status
== nfserr_symlink
)
360 status
= nfserr_notdir
;
364 switch (create
->cr_type
) {
366 /* ugh! we have to null-terminate the linktext, or
367 * vfs_symlink() will choke. it is always safe to
368 * null-terminate by brute force, since at worst we
369 * will overwrite the first byte of the create namelen
370 * in the XDR buffer, which has already been extracted
373 create
->cr_linkname
[create
->cr_linklen
] = 0;
375 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
376 create
->cr_name
, create
->cr_namelen
,
377 create
->cr_linkname
, create
->cr_linklen
,
378 &resfh
, &create
->cr_iattr
);
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
, &cstate
->current_fh
,
387 create
->cr_name
, create
->cr_namelen
,
388 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
392 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
393 if (MAJOR(rdev
) != create
->cr_specdata1
||
394 MINOR(rdev
) != create
->cr_specdata2
)
396 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
397 create
->cr_name
, create
->cr_namelen
,
398 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
402 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
403 create
->cr_name
, create
->cr_namelen
,
404 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
408 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
409 create
->cr_name
, create
->cr_namelen
,
410 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
414 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
415 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
416 create
->cr_name
, create
->cr_namelen
,
417 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
421 status
= nfserr_badtype
;
425 fh_unlock(&cstate
->current_fh
);
426 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
427 fh_dup2(&cstate
->current_fh
, &resfh
);
435 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
436 struct nfsd4_getattr
*getattr
)
440 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
444 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
447 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
448 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
450 getattr
->ga_fhp
= &cstate
->current_fh
;
455 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
456 struct nfsd4_link
*link
)
458 __be32 status
= nfserr_nofilehandle
;
460 if (!cstate
->save_fh
.fh_dentry
)
462 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
463 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
465 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
470 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
473 struct svc_fh tmp_fh
;
476 fh_init(&tmp_fh
, NFS4_FHSIZE
);
477 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
480 if (tmp_fh
.fh_dentry
== cstate
->current_fh
.fh_dentry
) {
485 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
486 "..", 2, &cstate
->current_fh
);
490 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
491 struct nfsd4_lookup
*lookup
)
493 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
494 lookup
->lo_name
, lookup
->lo_len
,
495 &cstate
->current_fh
);
499 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
500 struct nfsd4_read
*read
)
504 /* no need to check permission - this will be done in nfsd_read() */
506 read
->rd_filp
= NULL
;
507 if (read
->rd_offset
>= OFFSET_MAX
)
512 if ((status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
514 CHECK_FH
| RD_STATE
, &read
->rd_filp
))) {
515 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
519 get_file(read
->rd_filp
);
523 read
->rd_rqstp
= rqstp
;
524 read
->rd_fhp
= &cstate
->current_fh
;
529 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
530 struct nfsd4_readdir
*readdir
)
532 u64 cookie
= readdir
->rd_cookie
;
533 static const nfs4_verifier zeroverf
;
535 /* no need to check permission - this will be done in nfsd_readdir() */
537 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
540 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
541 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
543 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
544 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
545 return nfserr_bad_cookie
;
547 readdir
->rd_rqstp
= rqstp
;
548 readdir
->rd_fhp
= &cstate
->current_fh
;
553 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
554 struct nfsd4_readlink
*readlink
)
556 readlink
->rl_rqstp
= rqstp
;
557 readlink
->rl_fhp
= &cstate
->current_fh
;
562 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
563 struct nfsd4_remove
*remove
)
569 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
570 remove
->rm_name
, remove
->rm_namelen
);
571 if (status
== nfserr_symlink
)
572 return nfserr_notdir
;
574 fh_unlock(&cstate
->current_fh
);
575 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
581 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
582 struct nfsd4_rename
*rename
)
584 __be32 status
= nfserr_nofilehandle
;
586 if (!cstate
->save_fh
.fh_dentry
)
588 if (nfs4_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
589 & NFSEXP_NOSUBTREECHECK
))
591 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
592 rename
->rn_snamelen
, &cstate
->current_fh
,
593 rename
->rn_tname
, rename
->rn_tnamelen
);
595 /* the underlying filesystem returns different error's than required
596 * by NFSv4. both save_fh and current_fh have been verified.. */
597 if (status
== nfserr_isdir
)
598 status
= nfserr_exist
;
599 else if ((status
== nfserr_notdir
) &&
600 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
601 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
602 status
= nfserr_exist
;
603 else if (status
== nfserr_symlink
)
604 status
= nfserr_notdir
;
607 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
608 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
614 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
615 struct nfsd4_secinfo
*secinfo
)
618 struct svc_export
*exp
;
619 struct dentry
*dentry
;
622 fh_init(&resfh
, NFS4_FHSIZE
);
623 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
624 secinfo
->si_name
, secinfo
->si_namelen
,
628 if (dentry
->d_inode
== NULL
) {
632 secinfo
->si_exp
= exp
;
638 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
639 struct nfsd4_setattr
*setattr
)
641 __be32 status
= nfs_ok
;
643 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
645 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
646 &setattr
->sa_stateid
, CHECK_FH
| WR_STATE
, NULL
);
649 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
654 if (setattr
->sa_acl
!= NULL
)
655 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
659 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
665 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
666 struct nfsd4_write
*write
)
668 stateid_t
*stateid
= &write
->wr_stateid
;
669 struct file
*filp
= NULL
;
671 __be32 status
= nfs_ok
;
673 /* no need to check permission - this will be done in nfsd_write() */
675 if (write
->wr_offset
>= OFFSET_MAX
)
679 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
, stateid
,
680 CHECK_FH
| WR_STATE
, &filp
);
686 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
690 write
->wr_bytes_written
= write
->wr_buflen
;
691 write
->wr_how_written
= write
->wr_stable_how
;
692 p
= (u32
*)write
->wr_verifier
.data
;
693 *p
++ = nfssvc_boot
.tv_sec
;
694 *p
++ = nfssvc_boot
.tv_usec
;
696 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
697 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
698 write
->wr_buflen
, &write
->wr_how_written
);
702 if (status
== nfserr_symlink
)
703 status
= nfserr_inval
;
707 /* This routine never returns NFS_OK! If there are no other errors, it
708 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
709 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
710 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
713 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
714 struct nfsd4_verify
*verify
)
720 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
724 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
725 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
726 return nfserr_attrnotsupp
;
727 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
728 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
730 if (verify
->ve_attrlen
& 3)
734 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
736 count
= 4 + (verify
->ve_attrlen
>> 2);
737 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
739 return nfserr_resource
;
741 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
742 cstate
->current_fh
.fh_export
,
743 cstate
->current_fh
.fh_dentry
, buf
,
744 &count
, verify
->ve_bmval
,
747 /* this means that nfsd4_encode_fattr() ran out of space */
748 if (status
== nfserr_resource
&& count
== 0)
749 status
= nfserr_not_same
;
754 status
= nfserr_not_same
;
755 if (ntohl(*p
++) != verify
->ve_attrlen
)
757 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
758 status
= nfserr_same
;
766 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
767 struct nfsd4_verify
*verify
)
771 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
772 return status
== nfserr_not_same
? nfs_ok
: status
;
776 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
777 struct nfsd4_verify
*verify
)
781 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
782 return status
== nfserr_same
? nfs_ok
: status
;
789 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
794 static inline void nfsd4_increment_op_stats(u32 opnum
)
796 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
797 nfsdstats
.nfs4_opcount
[opnum
]++;
800 static void cstate_free(struct nfsd4_compound_state
*cstate
)
804 fh_put(&cstate
->current_fh
);
805 fh_put(&cstate
->save_fh
);
806 BUG_ON(cstate
->replay_owner
);
810 static struct nfsd4_compound_state
*cstate_alloc(void)
812 struct nfsd4_compound_state
*cstate
;
814 cstate
= kmalloc(sizeof(struct nfsd4_compound_state
), GFP_KERNEL
);
817 fh_init(&cstate
->current_fh
, NFS4_FHSIZE
);
818 fh_init(&cstate
->save_fh
, NFS4_FHSIZE
);
819 cstate
->replay_owner
= NULL
;
823 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
826 struct nfsd4_operation
{
827 nfsd4op_func op_func
;
829 /* Most ops require a valid current filehandle; a few don't: */
830 #define ALLOWED_WITHOUT_FH 1
831 /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
832 #define ALLOWED_ON_ABSENT_FS 2
835 static struct nfsd4_operation nfsd4_ops
[];
841 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
842 struct nfsd4_compoundargs
*args
,
843 struct nfsd4_compoundres
*resp
)
846 struct nfsd4_operation
*opdesc
;
847 struct nfsd4_compound_state
*cstate
= NULL
;
851 status
= nfserr_resource
;
852 cstate
= cstate_alloc();
856 resp
->xbuf
= &rqstp
->rq_res
;
857 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+ rqstp
->rq_res
.head
[0].iov_len
;
858 resp
->tagp
= resp
->p
;
859 /* reserve space for: taglen, tag, and opcnt */
860 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
861 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
862 resp
->taglen
= args
->taglen
;
863 resp
->tag
= args
->tag
;
868 * According to RFC3010, this takes precedence over all other errors.
870 status
= nfserr_minor_vers_mismatch
;
871 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
875 while (!status
&& resp
->opcnt
< args
->opcnt
) {
876 op
= &args
->ops
[resp
->opcnt
++];
878 dprintk("nfsv4 compound op #%d: %d\n", resp
->opcnt
, op
->opnum
);
881 * The XDR decode routines may have pre-set op->status;
882 * for example, if there is a miscellaneous XDR error
883 * it will be set to nfserr_bad_xdr.
888 /* We must be able to encode a successful response to
889 * this operation, with enough room left over to encode a
890 * failed response to the next operation. If we don't
891 * have enough room, fail with ERR_RESOURCE.
893 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
894 if (slack_bytes
< COMPOUND_SLACK_SPACE
895 + COMPOUND_ERR_SLACK_SPACE
) {
896 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
897 op
->status
= nfserr_resource
;
901 opdesc
= &nfsd4_ops
[op
->opnum
];
903 if (!cstate
->current_fh
.fh_dentry
) {
904 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
905 op
->status
= nfserr_nofilehandle
;
908 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
909 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
910 op
->status
= nfserr_moved
;
915 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
917 BUG_ON(op
->status
== nfs_ok
);
920 if (op
->status
== nfserr_replay_me
) {
921 op
->replay
= &cstate
->replay_owner
->so_replay
;
922 nfsd4_encode_replay(resp
, op
);
923 status
= op
->status
= op
->replay
->rp_status
;
925 nfsd4_encode_operation(resp
, op
);
928 if (cstate
->replay_owner
) {
929 nfs4_put_stateowner(cstate
->replay_owner
);
930 cstate
->replay_owner
= NULL
;
932 /* XXX Ugh, we need to get rid of this kind of special case: */
933 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
934 fput(op
->u
.read
.rd_filp
);
936 nfsd4_increment_op_stats(op
->opnum
);
940 nfsd4_release_compoundargs(args
);
945 static struct nfsd4_operation nfsd4_ops
[OP_RELEASE_LOCKOWNER
+1] = {
947 .op_func
= (nfsd4op_func
)nfsd4_access
,
950 .op_func
= (nfsd4op_func
)nfsd4_close
,
953 .op_func
= (nfsd4op_func
)nfsd4_commit
,
956 .op_func
= (nfsd4op_func
)nfsd4_create
,
959 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
962 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
963 .op_flags
= ALLOWED_ON_ABSENT_FS
,
966 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
969 .op_func
= (nfsd4op_func
)nfsd4_link
,
972 .op_func
= (nfsd4op_func
)nfsd4_lock
,
975 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
978 .op_func
= (nfsd4op_func
)nfsd4_locku
,
981 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
984 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
987 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
990 .op_func
= (nfsd4op_func
)nfsd4_open
,
992 [OP_OPEN_CONFIRM
] = {
993 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
995 [OP_OPEN_DOWNGRADE
] = {
996 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
999 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1000 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1003 /* unsupported; just for future reference: */
1004 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1007 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1008 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1011 .op_func
= (nfsd4op_func
)nfsd4_read
,
1014 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1017 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1020 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1023 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1026 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1027 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1030 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1031 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1034 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1037 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1040 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1042 [OP_SETCLIENTID
] = {
1043 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1044 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1046 [OP_SETCLIENTID_CONFIRM
] = {
1047 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1048 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1051 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1054 .op_func
= (nfsd4op_func
)nfsd4_write
,
1056 [OP_RELEASE_LOCKOWNER
] = {
1057 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1058 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1062 #define nfs4svc_decode_voidargs NULL
1063 #define nfs4svc_release_void NULL
1064 #define nfsd4_voidres nfsd4_voidargs
1065 #define nfs4svc_release_compound NULL
1066 struct nfsd4_voidargs
{ int dummy
; };
1068 #define PROC(name, argt, rest, relt, cache, respsize) \
1069 { (svc_procfunc) nfsd4_proc_##name, \
1070 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1071 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1072 (kxdrproc_t) nfs4svc_release_##relt, \
1073 sizeof(struct nfsd4_##argt##args), \
1074 sizeof(struct nfsd4_##rest##res), \
1081 * TODO: At the present time, the NFSv4 server does not do XID caching
1082 * of requests. Implementing XID caching would not be a serious problem,
1083 * although it would require a mild change in interfaces since one
1084 * doesn't know whether an NFSv4 request is idempotent until after the
1085 * XDR decode. However, XID caching totally confuses pynfs (Peter
1086 * Astrand's regression testsuite for NFSv4 servers), which reuses
1087 * XID's liberally, so I've left it unimplemented until pynfs generates
1090 static struct svc_procedure nfsd_procedures4
[2] = {
1091 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1092 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1095 struct svc_version nfsd_version4
= {
1098 .vs_proc
= nfsd_procedures4
,
1099 .vs_dispatch
= nfsd_dispatch
,
1100 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,