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 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
, &cstate
->current_fh
,
221 case NFS4_OPEN_CLAIM_PREVIOUS
:
222 open
->op_stateowner
->so_confirmed
= 1;
224 * The CURRENT_FH is already set to the file being
225 * opened. (1) set open->op_cinfo, (2) set
226 * open->op_truncate if the file is to be truncated
227 * after opening, (3) do permission checking.
229 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
234 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
235 open
->op_stateowner
->so_confirmed
= 1;
236 dprintk("NFSD: unsupported OPEN claim type %d\n",
237 open
->op_claim_type
);
238 status
= nfserr_notsupp
;
241 dprintk("NFSD: Invalid OPEN claim type %d\n",
242 open
->op_claim_type
);
243 status
= nfserr_inval
;
247 * nfsd4_process_open2() does the actual opening of the file. If
248 * successful, it (1) truncates the file if open->op_truncate was
249 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
251 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
253 if (open
->op_stateowner
) {
254 nfs4_get_stateowner(open
->op_stateowner
);
255 cstate
->replay_owner
= open
->op_stateowner
;
262 * filehandle-manipulating ops.
265 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
266 struct svc_fh
**getfh
)
268 if (!cstate
->current_fh
.fh_dentry
)
269 return nfserr_nofilehandle
;
271 *getfh
= &cstate
->current_fh
;
276 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
277 struct nfsd4_putfh
*putfh
)
279 fh_put(&cstate
->current_fh
);
280 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
281 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
283 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
287 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
292 fh_put(&cstate
->current_fh
);
293 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
298 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
301 if (!cstate
->save_fh
.fh_dentry
)
302 return nfserr_restorefh
;
304 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
309 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
312 if (!cstate
->current_fh
.fh_dentry
)
313 return nfserr_nofilehandle
;
315 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
323 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
324 struct nfsd4_access
*access
)
326 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
329 access
->ac_resp_access
= access
->ac_req_access
;
330 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
331 &access
->ac_supported
);
335 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
336 struct nfsd4_commit
*commit
)
340 u32
*p
= (u32
*)commit
->co_verf
.data
;
341 *p
++ = nfssvc_boot
.tv_sec
;
342 *p
++ = nfssvc_boot
.tv_usec
;
344 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
346 if (status
== nfserr_symlink
)
347 status
= nfserr_inval
;
352 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
353 struct nfsd4_create
*create
)
359 fh_init(&resfh
, NFS4_FHSIZE
);
361 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
363 if (status
== nfserr_symlink
)
364 status
= nfserr_notdir
;
368 switch (create
->cr_type
) {
370 /* ugh! we have to null-terminate the linktext, or
371 * vfs_symlink() will choke. it is always safe to
372 * null-terminate by brute force, since at worst we
373 * will overwrite the first byte of the create namelen
374 * in the XDR buffer, which has already been extracted
377 create
->cr_linkname
[create
->cr_linklen
] = 0;
379 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
380 create
->cr_name
, create
->cr_namelen
,
381 create
->cr_linkname
, create
->cr_linklen
,
382 &resfh
, &create
->cr_iattr
);
386 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
387 if (MAJOR(rdev
) != create
->cr_specdata1
||
388 MINOR(rdev
) != create
->cr_specdata2
)
390 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
391 create
->cr_name
, create
->cr_namelen
,
392 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
396 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
397 if (MAJOR(rdev
) != create
->cr_specdata1
||
398 MINOR(rdev
) != create
->cr_specdata2
)
400 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
401 create
->cr_name
, create
->cr_namelen
,
402 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
406 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
407 create
->cr_name
, create
->cr_namelen
,
408 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
412 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
413 create
->cr_name
, create
->cr_namelen
,
414 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
418 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
419 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
420 create
->cr_name
, create
->cr_namelen
,
421 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
425 status
= nfserr_badtype
;
429 fh_unlock(&cstate
->current_fh
);
430 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
431 fh_dup2(&cstate
->current_fh
, &resfh
);
439 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
440 struct nfsd4_getattr
*getattr
)
444 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
448 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
451 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
452 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
454 getattr
->ga_fhp
= &cstate
->current_fh
;
459 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
460 struct nfsd4_link
*link
)
462 __be32 status
= nfserr_nofilehandle
;
464 if (!cstate
->save_fh
.fh_dentry
)
466 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
467 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
469 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
474 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
477 struct svc_fh tmp_fh
;
480 fh_init(&tmp_fh
, NFS4_FHSIZE
);
481 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
484 if (tmp_fh
.fh_dentry
== cstate
->current_fh
.fh_dentry
) {
489 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
490 "..", 2, &cstate
->current_fh
);
494 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
495 struct nfsd4_lookup
*lookup
)
497 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
498 lookup
->lo_name
, lookup
->lo_len
,
499 &cstate
->current_fh
);
503 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
504 struct nfsd4_read
*read
)
508 /* no need to check permission - this will be done in nfsd_read() */
510 read
->rd_filp
= NULL
;
511 if (read
->rd_offset
>= OFFSET_MAX
)
516 if ((status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
518 RD_STATE
, &read
->rd_filp
))) {
519 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
523 get_file(read
->rd_filp
);
527 read
->rd_rqstp
= rqstp
;
528 read
->rd_fhp
= &cstate
->current_fh
;
533 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
534 struct nfsd4_readdir
*readdir
)
536 u64 cookie
= readdir
->rd_cookie
;
537 static const nfs4_verifier zeroverf
;
539 /* no need to check permission - this will be done in nfsd_readdir() */
541 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
544 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
545 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
547 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
548 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
549 return nfserr_bad_cookie
;
551 readdir
->rd_rqstp
= rqstp
;
552 readdir
->rd_fhp
= &cstate
->current_fh
;
557 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
558 struct nfsd4_readlink
*readlink
)
560 readlink
->rl_rqstp
= rqstp
;
561 readlink
->rl_fhp
= &cstate
->current_fh
;
566 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
567 struct nfsd4_remove
*remove
)
571 if (locks_in_grace())
573 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
574 remove
->rm_name
, remove
->rm_namelen
);
575 if (status
== nfserr_symlink
)
576 return nfserr_notdir
;
578 fh_unlock(&cstate
->current_fh
);
579 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
585 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
586 struct nfsd4_rename
*rename
)
588 __be32 status
= nfserr_nofilehandle
;
590 if (!cstate
->save_fh
.fh_dentry
)
592 if (locks_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
593 & NFSEXP_NOSUBTREECHECK
))
595 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
596 rename
->rn_snamelen
, &cstate
->current_fh
,
597 rename
->rn_tname
, rename
->rn_tnamelen
);
599 /* the underlying filesystem returns different error's than required
600 * by NFSv4. both save_fh and current_fh have been verified.. */
601 if (status
== nfserr_isdir
)
602 status
= nfserr_exist
;
603 else if ((status
== nfserr_notdir
) &&
604 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
605 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
606 status
= nfserr_exist
;
607 else if (status
== nfserr_symlink
)
608 status
= nfserr_notdir
;
611 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
612 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
618 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
619 struct nfsd4_secinfo
*secinfo
)
622 struct svc_export
*exp
;
623 struct dentry
*dentry
;
626 fh_init(&resfh
, NFS4_FHSIZE
);
627 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
628 secinfo
->si_name
, secinfo
->si_namelen
,
632 if (dentry
->d_inode
== NULL
) {
636 secinfo
->si_exp
= exp
;
642 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
643 struct nfsd4_setattr
*setattr
)
645 __be32 status
= nfs_ok
;
647 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
649 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
,
650 &setattr
->sa_stateid
, WR_STATE
, NULL
);
653 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
657 status
= mnt_want_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
661 if (setattr
->sa_acl
!= NULL
)
662 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
666 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
669 mnt_drop_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
674 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
675 struct nfsd4_write
*write
)
677 stateid_t
*stateid
= &write
->wr_stateid
;
678 struct file
*filp
= NULL
;
680 __be32 status
= nfs_ok
;
683 /* no need to check permission - this will be done in nfsd_write() */
685 if (write
->wr_offset
>= OFFSET_MAX
)
689 status
= nfs4_preprocess_stateid_op(&cstate
->current_fh
, stateid
,
696 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
700 cnt
= write
->wr_buflen
;
701 write
->wr_how_written
= write
->wr_stable_how
;
702 p
= (u32
*)write
->wr_verifier
.data
;
703 *p
++ = nfssvc_boot
.tv_sec
;
704 *p
++ = nfssvc_boot
.tv_usec
;
706 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
707 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
708 &cnt
, &write
->wr_how_written
);
712 write
->wr_bytes_written
= cnt
;
714 if (status
== nfserr_symlink
)
715 status
= nfserr_inval
;
719 /* This routine never returns NFS_OK! If there are no other errors, it
720 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
721 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
722 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
725 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
726 struct nfsd4_verify
*verify
)
732 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
736 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
737 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
738 return nfserr_attrnotsupp
;
739 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
740 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
742 if (verify
->ve_attrlen
& 3)
746 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
748 count
= 4 + (verify
->ve_attrlen
>> 2);
749 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
751 return nfserr_resource
;
753 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
754 cstate
->current_fh
.fh_export
,
755 cstate
->current_fh
.fh_dentry
, buf
,
756 &count
, verify
->ve_bmval
,
759 /* this means that nfsd4_encode_fattr() ran out of space */
760 if (status
== nfserr_resource
&& count
== 0)
761 status
= nfserr_not_same
;
766 status
= nfserr_not_same
;
767 if (ntohl(*p
++) != verify
->ve_attrlen
)
769 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
770 status
= nfserr_same
;
778 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
779 struct nfsd4_verify
*verify
)
783 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
784 return status
== nfserr_not_same
? nfs_ok
: status
;
788 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
789 struct nfsd4_verify
*verify
)
793 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
794 return status
== nfserr_same
? nfs_ok
: status
;
801 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
806 static inline void nfsd4_increment_op_stats(u32 opnum
)
808 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
809 nfsdstats
.nfs4_opcount
[opnum
]++;
812 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
815 struct nfsd4_operation
{
816 nfsd4op_func op_func
;
818 /* Most ops require a valid current filehandle; a few don't: */
819 #define ALLOWED_WITHOUT_FH 1
820 /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */
821 #define ALLOWED_ON_ABSENT_FS 2
825 static struct nfsd4_operation nfsd4_ops
[];
827 static const char *nfsd4_op_name(unsigned opnum
);
833 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
834 struct nfsd4_compoundargs
*args
,
835 struct nfsd4_compoundres
*resp
)
838 struct nfsd4_operation
*opdesc
;
839 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
843 resp
->xbuf
= &rqstp
->rq_res
;
844 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+
845 rqstp
->rq_res
.head
[0].iov_len
;
846 resp
->tagp
= resp
->p
;
847 /* reserve space for: taglen, tag, and opcnt */
848 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
849 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
850 resp
->taglen
= args
->taglen
;
851 resp
->tag
= args
->tag
;
854 resp
->cstate
.replay_owner
= NULL
;
855 fh_init(&resp
->cstate
.current_fh
, NFS4_FHSIZE
);
856 fh_init(&resp
->cstate
.save_fh
, NFS4_FHSIZE
);
857 /* Use the deferral mechanism only for NFSv4.0 compounds */
858 rqstp
->rq_usedeferral
= (args
->minorversion
== 0);
861 * According to RFC3010, this takes precedence over all other errors.
863 status
= nfserr_minor_vers_mismatch
;
864 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
868 while (!status
&& resp
->opcnt
< args
->opcnt
) {
869 op
= &args
->ops
[resp
->opcnt
++];
871 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
872 resp
->opcnt
, args
->opcnt
, op
->opnum
,
873 nfsd4_op_name(op
->opnum
));
876 * The XDR decode routines may have pre-set op->status;
877 * for example, if there is a miscellaneous XDR error
878 * it will be set to nfserr_bad_xdr.
883 /* We must be able to encode a successful response to
884 * this operation, with enough room left over to encode a
885 * failed response to the next operation. If we don't
886 * have enough room, fail with ERR_RESOURCE.
888 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
889 if (slack_bytes
< COMPOUND_SLACK_SPACE
890 + COMPOUND_ERR_SLACK_SPACE
) {
891 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
892 op
->status
= nfserr_resource
;
896 opdesc
= &nfsd4_ops
[op
->opnum
];
898 if (!cstate
->current_fh
.fh_dentry
) {
899 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
900 op
->status
= nfserr_nofilehandle
;
903 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
904 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
905 op
->status
= nfserr_moved
;
910 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
912 BUG_ON(op
->status
== nfs_ok
);
915 if (op
->status
== nfserr_replay_me
) {
916 op
->replay
= &cstate
->replay_owner
->so_replay
;
917 nfsd4_encode_replay(resp
, op
);
918 status
= op
->status
= op
->replay
->rp_status
;
920 nfsd4_encode_operation(resp
, op
);
924 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
925 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
926 be32_to_cpu(status
));
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
);
938 if (!rqstp
->rq_usedeferral
&& status
== nfserr_dropit
) {
939 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__
);
940 status
= nfserr_jukebox
;
943 fh_put(&resp
->cstate
.current_fh
);
944 fh_put(&resp
->cstate
.save_fh
);
945 BUG_ON(resp
->cstate
.replay_owner
);
947 nfsd4_release_compoundargs(args
);
948 /* Reset deferral mechanism for RPC deferrals */
949 rqstp
->rq_usedeferral
= 1;
950 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
954 static struct nfsd4_operation nfsd4_ops
[] = {
956 .op_func
= (nfsd4op_func
)nfsd4_access
,
957 .op_name
= "OP_ACCESS",
960 .op_func
= (nfsd4op_func
)nfsd4_close
,
961 .op_name
= "OP_CLOSE",
964 .op_func
= (nfsd4op_func
)nfsd4_commit
,
965 .op_name
= "OP_COMMIT",
968 .op_func
= (nfsd4op_func
)nfsd4_create
,
969 .op_name
= "OP_CREATE",
972 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
973 .op_name
= "OP_DELEGRETURN",
976 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
977 .op_flags
= ALLOWED_ON_ABSENT_FS
,
978 .op_name
= "OP_GETATTR",
981 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
982 .op_name
= "OP_GETFH",
985 .op_func
= (nfsd4op_func
)nfsd4_link
,
986 .op_name
= "OP_LINK",
989 .op_func
= (nfsd4op_func
)nfsd4_lock
,
990 .op_name
= "OP_LOCK",
993 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
994 .op_name
= "OP_LOCKT",
997 .op_func
= (nfsd4op_func
)nfsd4_locku
,
998 .op_name
= "OP_LOCKU",
1001 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1002 .op_name
= "OP_LOOKUP",
1005 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1006 .op_name
= "OP_LOOKUPP",
1009 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1010 .op_name
= "OP_NVERIFY",
1013 .op_func
= (nfsd4op_func
)nfsd4_open
,
1014 .op_name
= "OP_OPEN",
1016 [OP_OPEN_CONFIRM
] = {
1017 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1018 .op_name
= "OP_OPEN_CONFIRM",
1020 [OP_OPEN_DOWNGRADE
] = {
1021 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1022 .op_name
= "OP_OPEN_DOWNGRADE",
1025 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1026 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1027 .op_name
= "OP_PUTFH",
1030 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1031 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1032 .op_name
= "OP_PUTPUBFH",
1035 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1036 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1037 .op_name
= "OP_PUTROOTFH",
1040 .op_func
= (nfsd4op_func
)nfsd4_read
,
1041 .op_name
= "OP_READ",
1044 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1045 .op_name
= "OP_READDIR",
1048 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1049 .op_name
= "OP_READLINK",
1052 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1053 .op_name
= "OP_REMOVE",
1056 .op_name
= "OP_RENAME",
1057 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1060 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1061 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1062 .op_name
= "OP_RENEW",
1065 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1066 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1067 .op_name
= "OP_RESTOREFH",
1070 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1071 .op_name
= "OP_SAVEFH",
1074 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1075 .op_name
= "OP_SECINFO",
1078 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1079 .op_name
= "OP_SETATTR",
1081 [OP_SETCLIENTID
] = {
1082 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1083 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1084 .op_name
= "OP_SETCLIENTID",
1086 [OP_SETCLIENTID_CONFIRM
] = {
1087 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1088 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1089 .op_name
= "OP_SETCLIENTID_CONFIRM",
1092 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1093 .op_name
= "OP_VERIFY",
1096 .op_func
= (nfsd4op_func
)nfsd4_write
,
1097 .op_name
= "OP_WRITE",
1099 [OP_RELEASE_LOCKOWNER
] = {
1100 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1101 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1102 .op_name
= "OP_RELEASE_LOCKOWNER",
1106 static const char *nfsd4_op_name(unsigned opnum
)
1108 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1109 return nfsd4_ops
[opnum
].op_name
;
1110 return "unknown_operation";
1113 #define nfs4svc_decode_voidargs NULL
1114 #define nfs4svc_release_void NULL
1115 #define nfsd4_voidres nfsd4_voidargs
1116 #define nfs4svc_release_compound NULL
1117 struct nfsd4_voidargs
{ int dummy
; };
1119 #define PROC(name, argt, rest, relt, cache, respsize) \
1120 { (svc_procfunc) nfsd4_proc_##name, \
1121 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1122 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1123 (kxdrproc_t) nfs4svc_release_##relt, \
1124 sizeof(struct nfsd4_##argt##args), \
1125 sizeof(struct nfsd4_##rest##res), \
1132 * TODO: At the present time, the NFSv4 server does not do XID caching
1133 * of requests. Implementing XID caching would not be a serious problem,
1134 * although it would require a mild change in interfaces since one
1135 * doesn't know whether an NFSv4 request is idempotent until after the
1136 * XDR decode. However, XID caching totally confuses pynfs (Peter
1137 * Astrand's regression testsuite for NFSv4 servers), which reuses
1138 * XID's liberally, so I've left it unimplemented until pynfs generates
1141 static struct svc_procedure nfsd_procedures4
[2] = {
1142 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1143 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1146 struct svc_version nfsd_version4
= {
1149 .vs_proc
= nfsd_procedures4
,
1150 .vs_dispatch
= nfsd_dispatch
,
1151 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,