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>
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
59 cache_get(&src
->fh_export
->h
);
64 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
68 if (open
->op_truncate
&&
69 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
72 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
74 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
75 accmode
|= (MAY_WRITE
| MAY_TRUNC
);
76 if (open
->op_share_deny
& NFS4_SHARE_DENY_WRITE
)
79 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
85 do_open_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
91 fh_init(&resfh
, NFS4_FHSIZE
);
92 open
->op_truncate
= 0;
94 if (open
->op_create
) {
96 * Note: create modes (UNCHECKED,GUARDED...) are the same
99 status
= nfsd_create_v3(rqstp
, current_fh
, open
->op_fname
.data
,
100 open
->op_fname
.len
, &open
->op_iattr
,
101 &resfh
, open
->op_createmode
,
102 (u32
*)open
->op_verf
.data
, &open
->op_truncate
, &created
);
104 status
= nfsd_lookup(rqstp
, current_fh
,
105 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
106 fh_unlock(current_fh
);
111 set_change_info(&open
->op_cinfo
, current_fh
);
113 /* set reply cache */
114 fh_dup2(current_fh
, &resfh
);
115 open
->op_stateowner
->so_replay
.rp_openfh_len
= resfh
.fh_handle
.fh_size
;
116 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
117 &resfh
.fh_handle
.fh_base
, resfh
.fh_handle
.fh_size
);
120 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_NOP
);
128 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
132 /* Only reclaims from previously confirmed clients are valid */
133 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
136 /* We don't know the target directory, and therefore can not
137 * set the change info
140 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
142 /* set replay cache */
143 open
->op_stateowner
->so_replay
.rp_openfh_len
= current_fh
->fh_handle
.fh_size
;
144 memcpy(open
->op_stateowner
->so_replay
.rp_openfh
,
145 ¤t_fh
->fh_handle
.fh_base
,
146 current_fh
->fh_handle
.fh_size
);
148 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
149 (open
->op_iattr
.ia_size
== 0);
151 status
= do_open_permission(rqstp
, current_fh
, open
, MAY_OWNER_OVERRIDE
);
158 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
159 struct nfsd4_open
*open
)
162 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
163 (int)open
->op_fname
.len
, open
->op_fname
.data
,
164 open
->op_stateowner
);
166 /* This check required by spec. */
167 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
172 /* check seqid for replay. set nfs4_owner */
173 status
= nfsd4_process_open1(open
);
174 if (status
== nfserr_replay_me
) {
175 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
176 fh_put(&cstate
->current_fh
);
177 cstate
->current_fh
.fh_handle
.fh_size
= rp
->rp_openfh_len
;
178 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, rp
->rp_openfh
,
180 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
182 dprintk("nfsd4_open: replay failed"
183 " restoring previous filehandle\n");
185 status
= nfserr_replay_me
;
190 /* Openowner is now set, so sequence id will get bumped. Now we need
191 * these checks before we do any creates: */
192 status
= nfserr_grace
;
193 if (nfs4_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
195 status
= nfserr_no_grace
;
196 if (!nfs4_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
199 switch (open
->op_claim_type
) {
200 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
201 status
= nfserr_inval
;
205 case NFS4_OPEN_CLAIM_NULL
:
207 * (1) set CURRENT_FH to the file being opened,
208 * creating it if necessary, (2) set open->op_cinfo,
209 * (3) set open->op_truncate if the file is to be
210 * truncated after opening, (4) do permission checking.
212 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
217 case NFS4_OPEN_CLAIM_PREVIOUS
:
218 open
->op_stateowner
->so_confirmed
= 1;
220 * The CURRENT_FH is already set to the file being
221 * opened. (1) set open->op_cinfo, (2) set
222 * open->op_truncate if the file is to be truncated
223 * after opening, (3) do permission checking.
225 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
230 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
231 open
->op_stateowner
->so_confirmed
= 1;
232 printk("NFSD: unsupported OPEN claim type %d\n",
233 open
->op_claim_type
);
234 status
= nfserr_notsupp
;
237 printk("NFSD: Invalid OPEN claim type %d\n",
238 open
->op_claim_type
);
239 status
= nfserr_inval
;
243 * nfsd4_process_open2() does the actual opening of the file. If
244 * successful, it (1) truncates the file if open->op_truncate was
245 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
247 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
249 if (open
->op_stateowner
) {
250 nfs4_get_stateowner(open
->op_stateowner
);
251 cstate
->replay_owner
= open
->op_stateowner
;
258 * filehandle-manipulating ops.
261 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
262 struct svc_fh
**getfh
)
264 if (!cstate
->current_fh
.fh_dentry
)
265 return nfserr_nofilehandle
;
267 *getfh
= &cstate
->current_fh
;
272 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
273 struct nfsd4_putfh
*putfh
)
275 fh_put(&cstate
->current_fh
);
276 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
277 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
279 return fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
283 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
288 fh_put(&cstate
->current_fh
);
289 status
= exp_pseudoroot(rqstp
->rq_client
, &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 if((ret
= exp_pseudoroot(rqstp
->rq_client
, &tmp_fh
,
478 &rqstp
->rq_chandle
)) != 0)
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_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
615 struct nfsd4_setattr
*setattr
)
617 __be32 status
= nfs_ok
;
619 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
621 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
622 &setattr
->sa_stateid
, CHECK_FH
| WR_STATE
, NULL
);
625 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
630 if (setattr
->sa_acl
!= NULL
)
631 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
635 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
641 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
642 struct nfsd4_write
*write
)
644 stateid_t
*stateid
= &write
->wr_stateid
;
645 struct file
*filp
= NULL
;
647 __be32 status
= nfs_ok
;
649 /* no need to check permission - this will be done in nfsd_write() */
651 if (write
->wr_offset
>= OFFSET_MAX
)
655 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
, stateid
,
656 CHECK_FH
| WR_STATE
, &filp
);
662 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
666 write
->wr_bytes_written
= write
->wr_buflen
;
667 write
->wr_how_written
= write
->wr_stable_how
;
668 p
= (u32
*)write
->wr_verifier
.data
;
669 *p
++ = nfssvc_boot
.tv_sec
;
670 *p
++ = nfssvc_boot
.tv_usec
;
672 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
673 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
674 write
->wr_buflen
, &write
->wr_how_written
);
678 if (status
== nfserr_symlink
)
679 status
= nfserr_inval
;
683 /* This routine never returns NFS_OK! If there are no other errors, it
684 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
685 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
686 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
689 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
690 struct nfsd4_verify
*verify
)
696 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, MAY_NOP
);
700 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
701 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
702 return nfserr_attrnotsupp
;
703 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
704 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
706 if (verify
->ve_attrlen
& 3)
710 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
712 count
= 4 + (verify
->ve_attrlen
>> 2);
713 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
715 return nfserr_resource
;
717 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
718 cstate
->current_fh
.fh_export
,
719 cstate
->current_fh
.fh_dentry
, buf
,
720 &count
, verify
->ve_bmval
,
723 /* this means that nfsd4_encode_fattr() ran out of space */
724 if (status
== nfserr_resource
&& count
== 0)
725 status
= nfserr_not_same
;
730 status
= nfserr_not_same
;
731 if (ntohl(*p
++) != verify
->ve_attrlen
)
733 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
734 status
= nfserr_same
;
742 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
743 struct nfsd4_verify
*verify
)
747 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
748 return status
== nfserr_not_same
? nfs_ok
: status
;
752 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
753 struct nfsd4_verify
*verify
)
757 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
758 return status
== nfserr_same
? nfs_ok
: status
;
765 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
770 static inline void nfsd4_increment_op_stats(u32 opnum
)
772 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
773 nfsdstats
.nfs4_opcount
[opnum
]++;
776 static void cstate_free(struct nfsd4_compound_state
*cstate
)
780 fh_put(&cstate
->current_fh
);
781 fh_put(&cstate
->save_fh
);
782 BUG_ON(cstate
->replay_owner
);
786 static struct nfsd4_compound_state
*cstate_alloc(void)
788 struct nfsd4_compound_state
*cstate
;
790 cstate
= kmalloc(sizeof(struct nfsd4_compound_state
), GFP_KERNEL
);
793 fh_init(&cstate
->current_fh
, NFS4_FHSIZE
);
794 fh_init(&cstate
->save_fh
, NFS4_FHSIZE
);
795 cstate
->replay_owner
= NULL
;
799 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
802 struct nfsd4_operation
{
803 nfsd4op_func op_func
;
805 /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
806 #define ALLOWED_ON_ABSENT_FS 1
809 static struct nfsd4_operation nfsd4_ops
[];
815 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
816 struct nfsd4_compoundargs
*args
,
817 struct nfsd4_compoundres
*resp
)
820 struct nfsd4_operation
*opdesc
;
821 struct nfsd4_compound_state
*cstate
= NULL
;
825 status
= nfserr_resource
;
826 cstate
= cstate_alloc();
830 resp
->xbuf
= &rqstp
->rq_res
;
831 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+ rqstp
->rq_res
.head
[0].iov_len
;
832 resp
->tagp
= resp
->p
;
833 /* reserve space for: taglen, tag, and opcnt */
834 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
835 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
836 resp
->taglen
= args
->taglen
;
837 resp
->tag
= args
->tag
;
842 * According to RFC3010, this takes precedence over all other errors.
844 status
= nfserr_minor_vers_mismatch
;
845 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
849 while (!status
&& resp
->opcnt
< args
->opcnt
) {
850 op
= &args
->ops
[resp
->opcnt
++];
852 dprintk("nfsv4 compound op #%d: %d\n", resp
->opcnt
, op
->opnum
);
855 * The XDR decode routines may have pre-set op->status;
856 * for example, if there is a miscellaneous XDR error
857 * it will be set to nfserr_bad_xdr.
862 /* We must be able to encode a successful response to
863 * this operation, with enough room left over to encode a
864 * failed response to the next operation. If we don't
865 * have enough room, fail with ERR_RESOURCE.
867 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
868 if (slack_bytes
< COMPOUND_SLACK_SPACE
869 + COMPOUND_ERR_SLACK_SPACE
) {
870 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
871 op
->status
= nfserr_resource
;
875 opdesc
= &nfsd4_ops
[op
->opnum
];
877 /* All operations except RENEW, SETCLIENTID, RESTOREFH
878 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
879 * require a valid current filehandle
881 if (!cstate
->current_fh
.fh_dentry
) {
882 if (!((op
->opnum
== OP_PUTFH
) ||
883 (op
->opnum
== OP_PUTROOTFH
) ||
884 (op
->opnum
== OP_SETCLIENTID
) ||
885 (op
->opnum
== OP_SETCLIENTID_CONFIRM
) ||
886 (op
->opnum
== OP_RENEW
) ||
887 (op
->opnum
== OP_RESTOREFH
) ||
888 (op
->opnum
== OP_RELEASE_LOCKOWNER
))) {
889 op
->status
= nfserr_nofilehandle
;
892 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
893 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
894 op
->status
= nfserr_moved
;
899 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
901 BUG_ON(op
->status
== nfs_ok
);
904 if (op
->status
== nfserr_replay_me
) {
905 op
->replay
= &cstate
->replay_owner
->so_replay
;
906 nfsd4_encode_replay(resp
, op
);
907 status
= op
->status
= op
->replay
->rp_status
;
909 nfsd4_encode_operation(resp
, op
);
912 if (cstate
->replay_owner
) {
913 nfs4_put_stateowner(cstate
->replay_owner
);
914 cstate
->replay_owner
= NULL
;
916 /* XXX Ugh, we need to get rid of this kind of special case: */
917 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
918 fput(op
->u
.read
.rd_filp
);
920 nfsd4_increment_op_stats(op
->opnum
);
924 nfsd4_release_compoundargs(args
);
929 static struct nfsd4_operation nfsd4_ops
[OP_RELEASE_LOCKOWNER
+1] = {
931 .op_func
= (nfsd4op_func
)nfsd4_access
,
934 .op_func
= (nfsd4op_func
)nfsd4_close
,
937 .op_func
= (nfsd4op_func
)nfsd4_commit
,
940 .op_func
= (nfsd4op_func
)nfsd4_create
,
943 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
946 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
947 .op_flags
= ALLOWED_ON_ABSENT_FS
,
950 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
953 .op_func
= (nfsd4op_func
)nfsd4_link
,
956 .op_func
= (nfsd4op_func
)nfsd4_lock
,
959 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
962 .op_func
= (nfsd4op_func
)nfsd4_locku
,
965 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
968 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
971 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
974 .op_func
= (nfsd4op_func
)nfsd4_open
,
976 [OP_OPEN_CONFIRM
] = {
977 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
979 [OP_OPEN_DOWNGRADE
] = {
980 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
983 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
986 /* unsupported; just for future reference: */
987 .op_flags
= ALLOWED_ON_ABSENT_FS
,
990 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
991 .op_flags
= ALLOWED_ON_ABSENT_FS
,
994 .op_func
= (nfsd4op_func
)nfsd4_read
,
997 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1000 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1003 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1006 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1009 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1010 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1013 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1016 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1019 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1021 [OP_SETCLIENTID
] = {
1022 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1023 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1025 [OP_SETCLIENTID_CONFIRM
] = {
1026 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1029 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1032 .op_func
= (nfsd4op_func
)nfsd4_write
,
1034 [OP_RELEASE_LOCKOWNER
] = {
1035 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1036 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1040 #define nfs4svc_decode_voidargs NULL
1041 #define nfs4svc_release_void NULL
1042 #define nfsd4_voidres nfsd4_voidargs
1043 #define nfs4svc_release_compound NULL
1044 struct nfsd4_voidargs
{ int dummy
; };
1046 #define PROC(name, argt, rest, relt, cache, respsize) \
1047 { (svc_procfunc) nfsd4_proc_##name, \
1048 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1049 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1050 (kxdrproc_t) nfs4svc_release_##relt, \
1051 sizeof(struct nfsd4_##argt##args), \
1052 sizeof(struct nfsd4_##rest##res), \
1059 * TODO: At the present time, the NFSv4 server does not do XID caching
1060 * of requests. Implementing XID caching would not be a serious problem,
1061 * although it would require a mild change in interfaces since one
1062 * doesn't know whether an NFSv4 request is idempotent until after the
1063 * XDR decode. However, XID caching totally confuses pynfs (Peter
1064 * Astrand's regression testsuite for NFSv4 servers), which reuses
1065 * XID's liberally, so I've left it unimplemented until pynfs generates
1068 static struct svc_procedure nfsd_procedures4
[2] = {
1069 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1070 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1073 struct svc_version nfsd_version4
= {
1076 .vs_proc
= nfsd_procedures4
,
1077 .vs_dispatch
= nfsd_dispatch
,
1078 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,