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
)
74 accmode
|= NFSD_MAY_READ
;
75 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
76 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
77 if (open
->op_share_deny
& NFS4_SHARE_DENY_WRITE
)
78 accmode
|= NFSD_MAY_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
,
104 &open
->op_truncate
, &created
);
107 * Following rfc 3530 14.2.16, use the returned bitmask
108 * to indicate which attributes we used to store the
111 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
112 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
113 FATTR4_WORD1_TIME_MODIFY
);
115 status
= nfsd_lookup(rqstp
, current_fh
,
116 open
->op_fname
.data
, open
->op_fname
.len
, &resfh
);
117 fh_unlock(current_fh
);
122 set_change_info(&open
->op_cinfo
, current_fh
);
123 fh_dup2(current_fh
, &resfh
);
125 /* set reply cache */
126 fh_copy_shallow(&open
->op_stateowner
->so_replay
.rp_openfh
,
129 status
= do_open_permission(rqstp
, current_fh
, open
,
138 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
142 /* Only reclaims from previously confirmed clients are valid */
143 if ((status
= nfs4_check_open_reclaim(&open
->op_clientid
)))
146 /* We don't know the target directory, and therefore can not
147 * set the change info
150 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
152 /* set replay cache */
153 fh_copy_shallow(&open
->op_stateowner
->so_replay
.rp_openfh
,
154 ¤t_fh
->fh_handle
);
156 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
157 (open
->op_iattr
.ia_size
== 0);
159 status
= do_open_permission(rqstp
, current_fh
, open
,
160 NFSD_MAY_OWNER_OVERRIDE
);
167 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
168 struct nfsd4_open
*open
)
171 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
172 (int)open
->op_fname
.len
, open
->op_fname
.data
,
173 open
->op_stateowner
);
175 /* This check required by spec. */
176 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
181 /* check seqid for replay. set nfs4_owner */
182 status
= nfsd4_process_open1(open
);
183 if (status
== nfserr_replay_me
) {
184 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
185 fh_put(&cstate
->current_fh
);
186 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
188 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
190 dprintk("nfsd4_open: replay failed"
191 " restoring previous filehandle\n");
193 status
= nfserr_replay_me
;
198 /* Openowner is now set, so sequence id will get bumped. Now we need
199 * these checks before we do any creates: */
200 status
= nfserr_grace
;
201 if (locks_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
203 status
= nfserr_no_grace
;
204 if (!locks_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
207 switch (open
->op_claim_type
) {
208 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
209 status
= nfserr_inval
;
213 case NFS4_OPEN_CLAIM_NULL
:
215 * (1) set CURRENT_FH to the file being opened,
216 * creating it if necessary, (2) set open->op_cinfo,
217 * (3) set open->op_truncate if the file is to be
218 * truncated after opening, (4) do permission checking.
220 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
225 case NFS4_OPEN_CLAIM_PREVIOUS
:
226 open
->op_stateowner
->so_confirmed
= 1;
228 * The CURRENT_FH is already set to the file being
229 * opened. (1) set open->op_cinfo, (2) set
230 * open->op_truncate if the file is to be truncated
231 * after opening, (3) do permission checking.
233 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
238 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
239 open
->op_stateowner
->so_confirmed
= 1;
240 dprintk("NFSD: unsupported OPEN claim type %d\n",
241 open
->op_claim_type
);
242 status
= nfserr_notsupp
;
245 dprintk("NFSD: Invalid OPEN claim type %d\n",
246 open
->op_claim_type
);
247 status
= nfserr_inval
;
251 * nfsd4_process_open2() does the actual opening of the file. If
252 * successful, it (1) truncates the file if open->op_truncate was
253 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
255 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
257 if (open
->op_stateowner
) {
258 nfs4_get_stateowner(open
->op_stateowner
);
259 cstate
->replay_owner
= open
->op_stateowner
;
266 * filehandle-manipulating ops.
269 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
270 struct svc_fh
**getfh
)
272 if (!cstate
->current_fh
.fh_dentry
)
273 return nfserr_nofilehandle
;
275 *getfh
= &cstate
->current_fh
;
280 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
281 struct nfsd4_putfh
*putfh
)
283 fh_put(&cstate
->current_fh
);
284 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
285 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
287 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
291 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
296 fh_put(&cstate
->current_fh
);
297 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
302 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
305 if (!cstate
->save_fh
.fh_dentry
)
306 return nfserr_restorefh
;
308 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
313 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
316 if (!cstate
->current_fh
.fh_dentry
)
317 return nfserr_nofilehandle
;
319 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
327 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
328 struct nfsd4_access
*access
)
330 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
333 access
->ac_resp_access
= access
->ac_req_access
;
334 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
335 &access
->ac_supported
);
339 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
340 struct nfsd4_commit
*commit
)
344 u32
*p
= (u32
*)commit
->co_verf
.data
;
345 *p
++ = nfssvc_boot
.tv_sec
;
346 *p
++ = nfssvc_boot
.tv_usec
;
348 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
350 if (status
== nfserr_symlink
)
351 status
= nfserr_inval
;
356 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
357 struct nfsd4_create
*create
)
363 fh_init(&resfh
, NFS4_FHSIZE
);
365 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
367 if (status
== nfserr_symlink
)
368 status
= nfserr_notdir
;
372 switch (create
->cr_type
) {
374 /* ugh! we have to null-terminate the linktext, or
375 * vfs_symlink() will choke. it is always safe to
376 * null-terminate by brute force, since at worst we
377 * will overwrite the first byte of the create namelen
378 * in the XDR buffer, which has already been extracted
381 create
->cr_linkname
[create
->cr_linklen
] = 0;
383 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
384 create
->cr_name
, create
->cr_namelen
,
385 create
->cr_linkname
, create
->cr_linklen
,
386 &resfh
, &create
->cr_iattr
);
390 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
391 if (MAJOR(rdev
) != create
->cr_specdata1
||
392 MINOR(rdev
) != create
->cr_specdata2
)
394 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
395 create
->cr_name
, create
->cr_namelen
,
396 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
400 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
401 if (MAJOR(rdev
) != create
->cr_specdata1
||
402 MINOR(rdev
) != create
->cr_specdata2
)
404 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
405 create
->cr_name
, create
->cr_namelen
,
406 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
410 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
411 create
->cr_name
, create
->cr_namelen
,
412 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
416 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
417 create
->cr_name
, create
->cr_namelen
,
418 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
422 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
423 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
424 create
->cr_name
, create
->cr_namelen
,
425 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
429 status
= nfserr_badtype
;
433 fh_unlock(&cstate
->current_fh
);
434 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
435 fh_dup2(&cstate
->current_fh
, &resfh
);
443 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
444 struct nfsd4_getattr
*getattr
)
448 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
452 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
455 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
456 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
458 getattr
->ga_fhp
= &cstate
->current_fh
;
463 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
464 struct nfsd4_link
*link
)
466 __be32 status
= nfserr_nofilehandle
;
468 if (!cstate
->save_fh
.fh_dentry
)
470 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
471 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
473 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
478 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
481 struct svc_fh tmp_fh
;
484 fh_init(&tmp_fh
, NFS4_FHSIZE
);
485 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
488 if (tmp_fh
.fh_dentry
== cstate
->current_fh
.fh_dentry
) {
493 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
494 "..", 2, &cstate
->current_fh
);
498 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
499 struct nfsd4_lookup
*lookup
)
501 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
502 lookup
->lo_name
, lookup
->lo_len
,
503 &cstate
->current_fh
);
507 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
508 struct nfsd4_read
*read
)
512 /* no need to check permission - this will be done in nfsd_read() */
514 read
->rd_filp
= NULL
;
515 if (read
->rd_offset
>= OFFSET_MAX
)
520 if ((status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
522 RD_STATE
, &read
->rd_filp
))) {
523 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
527 get_file(read
->rd_filp
);
531 read
->rd_rqstp
= rqstp
;
532 read
->rd_fhp
= &cstate
->current_fh
;
537 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
538 struct nfsd4_readdir
*readdir
)
540 u64 cookie
= readdir
->rd_cookie
;
541 static const nfs4_verifier zeroverf
;
543 /* no need to check permission - this will be done in nfsd_readdir() */
545 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
548 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
549 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
551 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
552 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
553 return nfserr_bad_cookie
;
555 readdir
->rd_rqstp
= rqstp
;
556 readdir
->rd_fhp
= &cstate
->current_fh
;
561 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
562 struct nfsd4_readlink
*readlink
)
564 readlink
->rl_rqstp
= rqstp
;
565 readlink
->rl_fhp
= &cstate
->current_fh
;
570 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
571 struct nfsd4_remove
*remove
)
575 if (locks_in_grace())
577 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
578 remove
->rm_name
, remove
->rm_namelen
);
579 if (status
== nfserr_symlink
)
580 return nfserr_notdir
;
582 fh_unlock(&cstate
->current_fh
);
583 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
589 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
590 struct nfsd4_rename
*rename
)
592 __be32 status
= nfserr_nofilehandle
;
594 if (!cstate
->save_fh
.fh_dentry
)
596 if (locks_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
597 & NFSEXP_NOSUBTREECHECK
))
599 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
600 rename
->rn_snamelen
, &cstate
->current_fh
,
601 rename
->rn_tname
, rename
->rn_tnamelen
);
603 /* the underlying filesystem returns different error's than required
604 * by NFSv4. both save_fh and current_fh have been verified.. */
605 if (status
== nfserr_isdir
)
606 status
= nfserr_exist
;
607 else if ((status
== nfserr_notdir
) &&
608 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
609 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
610 status
= nfserr_exist
;
611 else if (status
== nfserr_symlink
)
612 status
= nfserr_notdir
;
615 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
616 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
622 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
623 struct nfsd4_secinfo
*secinfo
)
626 struct svc_export
*exp
;
627 struct dentry
*dentry
;
630 fh_init(&resfh
, NFS4_FHSIZE
);
631 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
632 secinfo
->si_name
, secinfo
->si_namelen
,
636 if (dentry
->d_inode
== NULL
) {
640 secinfo
->si_exp
= exp
;
646 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
647 struct nfsd4_setattr
*setattr
)
649 __be32 status
= nfs_ok
;
651 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
653 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
654 &setattr
->sa_stateid
, WR_STATE
, NULL
);
657 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
661 status
= mnt_want_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
665 if (setattr
->sa_acl
!= NULL
)
666 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
670 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
673 mnt_drop_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
678 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
679 struct nfsd4_write
*write
)
681 stateid_t
*stateid
= &write
->wr_stateid
;
682 struct file
*filp
= NULL
;
684 __be32 status
= nfs_ok
;
687 /* no need to check permission - this will be done in nfsd_write() */
689 if (write
->wr_offset
>= OFFSET_MAX
)
693 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
, stateid
,
700 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
704 cnt
= write
->wr_buflen
;
705 write
->wr_how_written
= write
->wr_stable_how
;
706 p
= (u32
*)write
->wr_verifier
.data
;
707 *p
++ = nfssvc_boot
.tv_sec
;
708 *p
++ = nfssvc_boot
.tv_usec
;
710 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
711 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
712 &cnt
, &write
->wr_how_written
);
716 write
->wr_bytes_written
= cnt
;
718 if (status
== nfserr_symlink
)
719 status
= nfserr_inval
;
723 /* This routine never returns NFS_OK! If there are no other errors, it
724 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
725 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
726 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
729 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
730 struct nfsd4_verify
*verify
)
736 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
740 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
741 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
742 return nfserr_attrnotsupp
;
743 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
744 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
746 if (verify
->ve_attrlen
& 3)
750 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
752 count
= 4 + (verify
->ve_attrlen
>> 2);
753 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
755 return nfserr_resource
;
757 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
758 cstate
->current_fh
.fh_export
,
759 cstate
->current_fh
.fh_dentry
, buf
,
760 &count
, verify
->ve_bmval
,
763 /* this means that nfsd4_encode_fattr() ran out of space */
764 if (status
== nfserr_resource
&& count
== 0)
765 status
= nfserr_not_same
;
770 status
= nfserr_not_same
;
771 if (ntohl(*p
++) != verify
->ve_attrlen
)
773 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
774 status
= nfserr_same
;
782 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
783 struct nfsd4_verify
*verify
)
787 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
788 return status
== nfserr_not_same
? nfs_ok
: status
;
792 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
793 struct nfsd4_verify
*verify
)
797 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
798 return status
== nfserr_same
? nfs_ok
: status
;
805 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
810 static inline void nfsd4_increment_op_stats(u32 opnum
)
812 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
813 nfsdstats
.nfs4_opcount
[opnum
]++;
816 static void cstate_free(struct nfsd4_compound_state
*cstate
)
820 fh_put(&cstate
->current_fh
);
821 fh_put(&cstate
->save_fh
);
822 BUG_ON(cstate
->replay_owner
);
826 static struct nfsd4_compound_state
*cstate_alloc(void)
828 struct nfsd4_compound_state
*cstate
;
830 cstate
= kmalloc(sizeof(struct nfsd4_compound_state
), GFP_KERNEL
);
833 fh_init(&cstate
->current_fh
, NFS4_FHSIZE
);
834 fh_init(&cstate
->save_fh
, NFS4_FHSIZE
);
835 cstate
->replay_owner
= NULL
;
839 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
842 struct nfsd4_operation
{
843 nfsd4op_func op_func
;
845 /* Most ops require a valid current filehandle; a few don't: */
846 #define ALLOWED_WITHOUT_FH 1
847 /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
848 #define ALLOWED_ON_ABSENT_FS 2
852 static struct nfsd4_operation nfsd4_ops
[];
854 static const char *nfsd4_op_name(unsigned opnum
);
860 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
861 struct nfsd4_compoundargs
*args
,
862 struct nfsd4_compoundres
*resp
)
865 struct nfsd4_operation
*opdesc
;
866 struct nfsd4_compound_state
*cstate
= NULL
;
870 resp
->xbuf
= &rqstp
->rq_res
;
871 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+ rqstp
->rq_res
.head
[0].iov_len
;
872 resp
->tagp
= resp
->p
;
873 /* reserve space for: taglen, tag, and opcnt */
874 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
875 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
876 resp
->taglen
= args
->taglen
;
877 resp
->tag
= args
->tag
;
882 * According to RFC3010, this takes precedence over all other errors.
884 status
= nfserr_minor_vers_mismatch
;
885 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
888 status
= nfserr_resource
;
889 cstate
= cstate_alloc();
894 while (!status
&& resp
->opcnt
< args
->opcnt
) {
895 op
= &args
->ops
[resp
->opcnt
++];
897 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
898 resp
->opcnt
, args
->opcnt
, op
->opnum
,
899 nfsd4_op_name(op
->opnum
));
902 * The XDR decode routines may have pre-set op->status;
903 * for example, if there is a miscellaneous XDR error
904 * it will be set to nfserr_bad_xdr.
909 /* We must be able to encode a successful response to
910 * this operation, with enough room left over to encode a
911 * failed response to the next operation. If we don't
912 * have enough room, fail with ERR_RESOURCE.
914 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
915 if (slack_bytes
< COMPOUND_SLACK_SPACE
916 + COMPOUND_ERR_SLACK_SPACE
) {
917 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
918 op
->status
= nfserr_resource
;
922 opdesc
= &nfsd4_ops
[op
->opnum
];
924 if (!cstate
->current_fh
.fh_dentry
) {
925 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
926 op
->status
= nfserr_nofilehandle
;
929 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
930 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
931 op
->status
= nfserr_moved
;
936 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
938 BUG_ON(op
->status
== nfs_ok
);
941 if (op
->status
== nfserr_replay_me
) {
942 op
->replay
= &cstate
->replay_owner
->so_replay
;
943 nfsd4_encode_replay(resp
, op
);
944 status
= op
->status
= op
->replay
->rp_status
;
946 nfsd4_encode_operation(resp
, op
);
950 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
951 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
952 be32_to_cpu(status
));
954 if (cstate
->replay_owner
) {
955 nfs4_put_stateowner(cstate
->replay_owner
);
956 cstate
->replay_owner
= NULL
;
958 /* XXX Ugh, we need to get rid of this kind of special case: */
959 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
960 fput(op
->u
.read
.rd_filp
);
962 nfsd4_increment_op_stats(op
->opnum
);
967 nfsd4_release_compoundargs(args
);
968 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
972 static struct nfsd4_operation nfsd4_ops
[OP_RELEASE_LOCKOWNER
+1] = {
974 .op_func
= (nfsd4op_func
)nfsd4_access
,
975 .op_name
= "OP_ACCESS",
978 .op_func
= (nfsd4op_func
)nfsd4_close
,
979 .op_name
= "OP_CLOSE",
982 .op_func
= (nfsd4op_func
)nfsd4_commit
,
983 .op_name
= "OP_COMMIT",
986 .op_func
= (nfsd4op_func
)nfsd4_create
,
987 .op_name
= "OP_CREATE",
990 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
991 .op_name
= "OP_DELEGRETURN",
994 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
995 .op_flags
= ALLOWED_ON_ABSENT_FS
,
996 .op_name
= "OP_GETATTR",
999 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1000 .op_name
= "OP_GETFH",
1003 .op_func
= (nfsd4op_func
)nfsd4_link
,
1004 .op_name
= "OP_LINK",
1007 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1008 .op_name
= "OP_LOCK",
1011 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1012 .op_name
= "OP_LOCKT",
1015 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1016 .op_name
= "OP_LOCKU",
1019 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1020 .op_name
= "OP_LOOKUP",
1023 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1024 .op_name
= "OP_LOOKUPP",
1027 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1028 .op_name
= "OP_NVERIFY",
1031 .op_func
= (nfsd4op_func
)nfsd4_open
,
1032 .op_name
= "OP_OPEN",
1034 [OP_OPEN_CONFIRM
] = {
1035 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1036 .op_name
= "OP_OPEN_CONFIRM",
1038 [OP_OPEN_DOWNGRADE
] = {
1039 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1040 .op_name
= "OP_OPEN_DOWNGRADE",
1043 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1044 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1045 .op_name
= "OP_PUTFH",
1048 /* unsupported, just for future reference: */
1049 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1050 .op_name
= "OP_PUTPUBFH",
1053 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1054 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1055 .op_name
= "OP_PUTROOTFH",
1058 .op_func
= (nfsd4op_func
)nfsd4_read
,
1059 .op_name
= "OP_READ",
1062 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1063 .op_name
= "OP_READDIR",
1066 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1067 .op_name
= "OP_READLINK",
1070 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1071 .op_name
= "OP_REMOVE",
1074 .op_name
= "OP_RENAME",
1075 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1078 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1079 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1080 .op_name
= "OP_RENEW",
1083 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1084 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1085 .op_name
= "OP_RESTOREFH",
1088 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1089 .op_name
= "OP_SAVEFH",
1092 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1093 .op_name
= "OP_SECINFO",
1096 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1097 .op_name
= "OP_SETATTR",
1099 [OP_SETCLIENTID
] = {
1100 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1101 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1102 .op_name
= "OP_SETCLIENTID",
1104 [OP_SETCLIENTID_CONFIRM
] = {
1105 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1106 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1107 .op_name
= "OP_SETCLIENTID_CONFIRM",
1110 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1111 .op_name
= "OP_VERIFY",
1114 .op_func
= (nfsd4op_func
)nfsd4_write
,
1115 .op_name
= "OP_WRITE",
1117 [OP_RELEASE_LOCKOWNER
] = {
1118 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1119 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1120 .op_name
= "OP_RELEASE_LOCKOWNER",
1124 static const char *nfsd4_op_name(unsigned opnum
)
1126 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1127 return nfsd4_ops
[opnum
].op_name
;
1128 return "unknown_operation";
1131 #define nfs4svc_decode_voidargs NULL
1132 #define nfs4svc_release_void NULL
1133 #define nfsd4_voidres nfsd4_voidargs
1134 #define nfs4svc_release_compound NULL
1135 struct nfsd4_voidargs
{ int dummy
; };
1137 #define PROC(name, argt, rest, relt, cache, respsize) \
1138 { (svc_procfunc) nfsd4_proc_##name, \
1139 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1140 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1141 (kxdrproc_t) nfs4svc_release_##relt, \
1142 sizeof(struct nfsd4_##argt##args), \
1143 sizeof(struct nfsd4_##rest##res), \
1150 * TODO: At the present time, the NFSv4 server does not do XID caching
1151 * of requests. Implementing XID caching would not be a serious problem,
1152 * although it would require a mild change in interfaces since one
1153 * doesn't know whether an NFSv4 request is idempotent until after the
1154 * XDR decode. However, XID caching totally confuses pynfs (Peter
1155 * Astrand's regression testsuite for NFSv4 servers), which reuses
1156 * XID's liberally, so I've left it unimplemented until pynfs generates
1159 static struct svc_procedure nfsd_procedures4
[2] = {
1160 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1161 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1164 struct svc_version nfsd_version4
= {
1167 .vs_proc
= nfsd_procedures4
,
1168 .vs_dispatch
= nfsd_dispatch
,
1169 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,