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
);
166 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
168 struct nfsd4_sessionid
*sid
=
169 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
171 clid
->cl_boot
= sid
->clientid
.cl_boot
;
172 clid
->cl_id
= sid
->clientid
.cl_id
;
176 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
177 struct nfsd4_open
*open
)
180 struct nfsd4_compoundres
*resp
;
182 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
183 (int)open
->op_fname
.len
, open
->op_fname
.data
,
184 open
->op_stateowner
);
186 /* This check required by spec. */
187 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
190 if (nfsd4_has_session(cstate
))
191 copy_clientid(&open
->op_clientid
, cstate
->session
);
195 /* check seqid for replay. set nfs4_owner */
196 resp
= rqstp
->rq_resp
;
197 status
= nfsd4_process_open1(&resp
->cstate
, open
);
198 if (status
== nfserr_replay_me
) {
199 struct nfs4_replay
*rp
= &open
->op_stateowner
->so_replay
;
200 fh_put(&cstate
->current_fh
);
201 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
203 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
205 dprintk("nfsd4_open: replay failed"
206 " restoring previous filehandle\n");
208 status
= nfserr_replay_me
;
213 /* Openowner is now set, so sequence id will get bumped. Now we need
214 * these checks before we do any creates: */
215 status
= nfserr_grace
;
216 if (locks_in_grace() && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
218 status
= nfserr_no_grace
;
219 if (!locks_in_grace() && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
222 switch (open
->op_claim_type
) {
223 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
224 case NFS4_OPEN_CLAIM_NULL
:
226 * (1) set CURRENT_FH to the file being opened,
227 * creating it if necessary, (2) set open->op_cinfo,
228 * (3) set open->op_truncate if the file is to be
229 * truncated after opening, (4) do permission checking.
231 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
236 case NFS4_OPEN_CLAIM_PREVIOUS
:
237 open
->op_stateowner
->so_confirmed
= 1;
239 * The CURRENT_FH is already set to the file being
240 * opened. (1) set open->op_cinfo, (2) set
241 * open->op_truncate if the file is to be truncated
242 * after opening, (3) do permission checking.
244 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
249 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
250 open
->op_stateowner
->so_confirmed
= 1;
251 dprintk("NFSD: unsupported OPEN claim type %d\n",
252 open
->op_claim_type
);
253 status
= nfserr_notsupp
;
256 dprintk("NFSD: Invalid OPEN claim type %d\n",
257 open
->op_claim_type
);
258 status
= nfserr_inval
;
262 * nfsd4_process_open2() does the actual opening of the file. If
263 * successful, it (1) truncates the file if open->op_truncate was
264 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
266 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
268 if (open
->op_stateowner
) {
269 nfs4_get_stateowner(open
->op_stateowner
);
270 cstate
->replay_owner
= open
->op_stateowner
;
277 * filehandle-manipulating ops.
280 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
281 struct svc_fh
**getfh
)
283 if (!cstate
->current_fh
.fh_dentry
)
284 return nfserr_nofilehandle
;
286 *getfh
= &cstate
->current_fh
;
291 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
292 struct nfsd4_putfh
*putfh
)
294 fh_put(&cstate
->current_fh
);
295 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
296 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
298 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
302 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
307 fh_put(&cstate
->current_fh
);
308 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
313 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
316 if (!cstate
->save_fh
.fh_dentry
)
317 return nfserr_restorefh
;
319 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
324 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
327 if (!cstate
->current_fh
.fh_dentry
)
328 return nfserr_nofilehandle
;
330 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
338 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
339 struct nfsd4_access
*access
)
341 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
344 access
->ac_resp_access
= access
->ac_req_access
;
345 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
346 &access
->ac_supported
);
350 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
351 struct nfsd4_commit
*commit
)
355 u32
*p
= (u32
*)commit
->co_verf
.data
;
356 *p
++ = nfssvc_boot
.tv_sec
;
357 *p
++ = nfssvc_boot
.tv_usec
;
359 status
= nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
361 if (status
== nfserr_symlink
)
362 status
= nfserr_inval
;
367 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
368 struct nfsd4_create
*create
)
374 fh_init(&resfh
, NFS4_FHSIZE
);
376 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
378 if (status
== nfserr_symlink
)
379 status
= nfserr_notdir
;
383 switch (create
->cr_type
) {
385 /* ugh! we have to null-terminate the linktext, or
386 * vfs_symlink() will choke. it is always safe to
387 * null-terminate by brute force, since at worst we
388 * will overwrite the first byte of the create namelen
389 * in the XDR buffer, which has already been extracted
392 create
->cr_linkname
[create
->cr_linklen
] = 0;
394 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
395 create
->cr_name
, create
->cr_namelen
,
396 create
->cr_linkname
, create
->cr_linklen
,
397 &resfh
, &create
->cr_iattr
);
401 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
402 if (MAJOR(rdev
) != create
->cr_specdata1
||
403 MINOR(rdev
) != create
->cr_specdata2
)
405 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
406 create
->cr_name
, create
->cr_namelen
,
407 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
411 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
412 if (MAJOR(rdev
) != create
->cr_specdata1
||
413 MINOR(rdev
) != create
->cr_specdata2
)
415 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
416 create
->cr_name
, create
->cr_namelen
,
417 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
421 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
422 create
->cr_name
, create
->cr_namelen
,
423 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
427 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
428 create
->cr_name
, create
->cr_namelen
,
429 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
433 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
434 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
435 create
->cr_name
, create
->cr_namelen
,
436 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
440 status
= nfserr_badtype
;
444 fh_unlock(&cstate
->current_fh
);
445 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
446 fh_dup2(&cstate
->current_fh
, &resfh
);
454 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
455 struct nfsd4_getattr
*getattr
)
459 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
463 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
466 getattr
->ga_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
467 getattr
->ga_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
469 getattr
->ga_fhp
= &cstate
->current_fh
;
474 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
475 struct nfsd4_link
*link
)
477 __be32 status
= nfserr_nofilehandle
;
479 if (!cstate
->save_fh
.fh_dentry
)
481 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
482 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
484 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
489 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
492 struct svc_fh tmp_fh
;
495 fh_init(&tmp_fh
, NFS4_FHSIZE
);
496 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
499 if (tmp_fh
.fh_dentry
== cstate
->current_fh
.fh_dentry
) {
504 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
505 "..", 2, &cstate
->current_fh
);
509 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
510 struct nfsd4_lookup
*lookup
)
512 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
513 lookup
->lo_name
, lookup
->lo_len
,
514 &cstate
->current_fh
);
518 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
519 struct nfsd4_read
*read
)
523 /* no need to check permission - this will be done in nfsd_read() */
525 read
->rd_filp
= NULL
;
526 if (read
->rd_offset
>= OFFSET_MAX
)
531 if ((status
= nfs4_preprocess_stateid_op(cstate
, &read
->rd_stateid
,
532 RD_STATE
, &read
->rd_filp
))) {
533 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
537 get_file(read
->rd_filp
);
541 read
->rd_rqstp
= rqstp
;
542 read
->rd_fhp
= &cstate
->current_fh
;
547 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
548 struct nfsd4_readdir
*readdir
)
550 u64 cookie
= readdir
->rd_cookie
;
551 static const nfs4_verifier zeroverf
;
553 /* no need to check permission - this will be done in nfsd_readdir() */
555 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
558 readdir
->rd_bmval
[0] &= NFSD_SUPPORTED_ATTRS_WORD0
;
559 readdir
->rd_bmval
[1] &= NFSD_SUPPORTED_ATTRS_WORD1
;
561 if ((cookie
> ~(u32
)0) || (cookie
== 1) || (cookie
== 2) ||
562 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
563 return nfserr_bad_cookie
;
565 readdir
->rd_rqstp
= rqstp
;
566 readdir
->rd_fhp
= &cstate
->current_fh
;
571 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
572 struct nfsd4_readlink
*readlink
)
574 readlink
->rl_rqstp
= rqstp
;
575 readlink
->rl_fhp
= &cstate
->current_fh
;
580 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
581 struct nfsd4_remove
*remove
)
585 if (locks_in_grace())
587 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
588 remove
->rm_name
, remove
->rm_namelen
);
589 if (status
== nfserr_symlink
)
590 return nfserr_notdir
;
592 fh_unlock(&cstate
->current_fh
);
593 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
599 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
600 struct nfsd4_rename
*rename
)
602 __be32 status
= nfserr_nofilehandle
;
604 if (!cstate
->save_fh
.fh_dentry
)
606 if (locks_in_grace() && !(cstate
->save_fh
.fh_export
->ex_flags
607 & NFSEXP_NOSUBTREECHECK
))
609 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
610 rename
->rn_snamelen
, &cstate
->current_fh
,
611 rename
->rn_tname
, rename
->rn_tnamelen
);
613 /* the underlying filesystem returns different error's than required
614 * by NFSv4. both save_fh and current_fh have been verified.. */
615 if (status
== nfserr_isdir
)
616 status
= nfserr_exist
;
617 else if ((status
== nfserr_notdir
) &&
618 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
619 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
620 status
= nfserr_exist
;
621 else if (status
== nfserr_symlink
)
622 status
= nfserr_notdir
;
625 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
626 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
632 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
633 struct nfsd4_secinfo
*secinfo
)
636 struct svc_export
*exp
;
637 struct dentry
*dentry
;
640 fh_init(&resfh
, NFS4_FHSIZE
);
641 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
642 secinfo
->si_name
, secinfo
->si_namelen
,
646 if (dentry
->d_inode
== NULL
) {
650 secinfo
->si_exp
= exp
;
656 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
657 struct nfsd4_setattr
*setattr
)
659 __be32 status
= nfs_ok
;
661 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
663 status
= nfs4_preprocess_stateid_op(cstate
,
664 &setattr
->sa_stateid
, WR_STATE
, NULL
);
667 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
671 status
= mnt_want_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
675 if (setattr
->sa_acl
!= NULL
)
676 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
680 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
683 mnt_drop_write(cstate
->current_fh
.fh_export
->ex_path
.mnt
);
688 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
689 struct nfsd4_write
*write
)
691 stateid_t
*stateid
= &write
->wr_stateid
;
692 struct file
*filp
= NULL
;
694 __be32 status
= nfs_ok
;
697 /* no need to check permission - this will be done in nfsd_write() */
699 if (write
->wr_offset
>= OFFSET_MAX
)
703 status
= nfs4_preprocess_stateid_op(cstate
, stateid
, WR_STATE
, &filp
);
709 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
713 cnt
= write
->wr_buflen
;
714 write
->wr_how_written
= write
->wr_stable_how
;
715 p
= (u32
*)write
->wr_verifier
.data
;
716 *p
++ = nfssvc_boot
.tv_sec
;
717 *p
++ = nfssvc_boot
.tv_usec
;
719 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
720 write
->wr_offset
, rqstp
->rq_vec
, write
->wr_vlen
,
721 &cnt
, &write
->wr_how_written
);
725 write
->wr_bytes_written
= cnt
;
727 if (status
== nfserr_symlink
)
728 status
= nfserr_inval
;
732 /* This routine never returns NFS_OK! If there are no other errors, it
733 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
734 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
735 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
738 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
739 struct nfsd4_verify
*verify
)
745 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
749 if ((verify
->ve_bmval
[0] & ~NFSD_SUPPORTED_ATTRS_WORD0
)
750 || (verify
->ve_bmval
[1] & ~NFSD_SUPPORTED_ATTRS_WORD1
))
751 return nfserr_attrnotsupp
;
752 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
753 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
755 if (verify
->ve_attrlen
& 3)
759 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
761 count
= 4 + (verify
->ve_attrlen
>> 2);
762 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
764 return nfserr_resource
;
766 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
767 cstate
->current_fh
.fh_export
,
768 cstate
->current_fh
.fh_dentry
, buf
,
769 &count
, verify
->ve_bmval
,
772 /* this means that nfsd4_encode_fattr() ran out of space */
773 if (status
== nfserr_resource
&& count
== 0)
774 status
= nfserr_not_same
;
779 status
= nfserr_not_same
;
780 if (ntohl(*p
++) != verify
->ve_attrlen
)
782 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
783 status
= nfserr_same
;
791 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
792 struct nfsd4_verify
*verify
)
796 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
797 return status
== nfserr_not_same
? nfs_ok
: status
;
801 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
802 struct nfsd4_verify
*verify
)
806 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
807 return status
== nfserr_same
? nfs_ok
: status
;
814 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
819 static inline void nfsd4_increment_op_stats(u32 opnum
)
821 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
822 nfsdstats
.nfs4_opcount
[opnum
]++;
825 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
827 enum nfsd4_op_flags
{
828 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
829 ALLOWED_ON_ABSENT_FS
= 2 << 0, /* ops processed on absent fs */
830 ALLOWED_AS_FIRST_OP
= 3 << 0, /* ops reqired first in compound */
833 struct nfsd4_operation
{
834 nfsd4op_func op_func
;
839 static struct nfsd4_operation nfsd4_ops
[];
841 static const char *nfsd4_op_name(unsigned opnum
);
844 * This is a replay of a compound for which no cache entry pages
845 * were used. Encode the sequence operation, and if cachethis is FALSE
846 * encode the uncache rep error on the next operation.
849 nfsd4_enc_uncached_replay(struct nfsd4_compoundargs
*args
,
850 struct nfsd4_compoundres
*resp
)
854 dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__
,
855 resp
->opcnt
, resp
->cstate
.slot
->sl_cache_entry
.ce_cachethis
);
857 /* Encode the replayed sequence operation */
858 BUG_ON(resp
->opcnt
!= 1);
859 op
= &args
->ops
[resp
->opcnt
- 1];
860 nfsd4_encode_operation(resp
, op
);
862 /*return nfserr_retry_uncached_rep in next operation. */
863 if (resp
->cstate
.slot
->sl_cache_entry
.ce_cachethis
== 0) {
864 op
= &args
->ops
[resp
->opcnt
++];
865 op
->status
= nfserr_retry_uncached_rep
;
866 nfsd4_encode_operation(resp
, op
);
872 * Enforce NFSv4.1 COMPOUND ordering rules.
875 * - enforce NFS4ERR_NOT_ONLY_OP,
876 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
878 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs
*args
)
880 if (args
->minorversion
&& args
->opcnt
> 0) {
881 struct nfsd4_op
*op
= &args
->ops
[0];
882 return (op
->status
== nfserr_op_illegal
) ||
883 (nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
);
892 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
893 struct nfsd4_compoundargs
*args
,
894 struct nfsd4_compoundres
*resp
)
897 struct nfsd4_operation
*opdesc
;
898 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
902 resp
->xbuf
= &rqstp
->rq_res
;
903 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+
904 rqstp
->rq_res
.head
[0].iov_len
;
905 resp
->tagp
= resp
->p
;
906 /* reserve space for: taglen, tag, and opcnt */
907 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
908 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
909 resp
->taglen
= args
->taglen
;
910 resp
->tag
= args
->tag
;
913 resp
->cstate
.minorversion
= args
->minorversion
;
914 resp
->cstate
.replay_owner
= NULL
;
915 fh_init(&resp
->cstate
.current_fh
, NFS4_FHSIZE
);
916 fh_init(&resp
->cstate
.save_fh
, NFS4_FHSIZE
);
917 /* Use the deferral mechanism only for NFSv4.0 compounds */
918 rqstp
->rq_usedeferral
= (args
->minorversion
== 0);
921 * According to RFC3010, this takes precedence over all other errors.
923 status
= nfserr_minor_vers_mismatch
;
924 if (args
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
927 if (!nfs41_op_ordering_ok(args
)) {
929 op
->status
= nfserr_sequence_pos
;
934 while (!status
&& resp
->opcnt
< args
->opcnt
) {
935 op
= &args
->ops
[resp
->opcnt
++];
937 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
938 resp
->opcnt
, args
->opcnt
, op
->opnum
,
939 nfsd4_op_name(op
->opnum
));
941 * The XDR decode routines may have pre-set op->status;
942 * for example, if there is a miscellaneous XDR error
943 * it will be set to nfserr_bad_xdr.
948 /* We must be able to encode a successful response to
949 * this operation, with enough room left over to encode a
950 * failed response to the next operation. If we don't
951 * have enough room, fail with ERR_RESOURCE.
953 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
954 if (slack_bytes
< COMPOUND_SLACK_SPACE
955 + COMPOUND_ERR_SLACK_SPACE
) {
956 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
957 op
->status
= nfserr_resource
;
961 opdesc
= &nfsd4_ops
[op
->opnum
];
963 if (!cstate
->current_fh
.fh_dentry
) {
964 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
965 op
->status
= nfserr_nofilehandle
;
968 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
969 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
970 op
->status
= nfserr_moved
;
975 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
977 BUG_ON(op
->status
== nfs_ok
);
980 /* Only from SEQUENCE or CREATE_SESSION */
981 if (resp
->cstate
.status
== nfserr_replay_cache
) {
982 dprintk("%s NFS4.1 replay from cache\n", __func__
);
983 if (nfsd4_not_cached(resp
))
984 status
= nfsd4_enc_uncached_replay(args
, resp
);
989 if (op
->status
== nfserr_replay_me
) {
990 op
->replay
= &cstate
->replay_owner
->so_replay
;
991 nfsd4_encode_replay(resp
, op
);
992 status
= op
->status
= op
->replay
->rp_status
;
994 nfsd4_encode_operation(resp
, op
);
998 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
999 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1000 be32_to_cpu(status
));
1002 if (cstate
->replay_owner
) {
1003 nfs4_put_stateowner(cstate
->replay_owner
);
1004 cstate
->replay_owner
= NULL
;
1006 /* XXX Ugh, we need to get rid of this kind of special case: */
1007 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1008 fput(op
->u
.read
.rd_filp
);
1010 nfsd4_increment_op_stats(op
->opnum
);
1012 if (!rqstp
->rq_usedeferral
&& status
== nfserr_dropit
) {
1013 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__
);
1014 status
= nfserr_jukebox
;
1017 resp
->cstate
.status
= status
;
1018 fh_put(&resp
->cstate
.current_fh
);
1019 fh_put(&resp
->cstate
.save_fh
);
1020 BUG_ON(resp
->cstate
.replay_owner
);
1022 nfsd4_release_compoundargs(args
);
1023 /* Reset deferral mechanism for RPC deferrals */
1024 rqstp
->rq_usedeferral
= 1;
1025 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1029 static struct nfsd4_operation nfsd4_ops
[] = {
1031 .op_func
= (nfsd4op_func
)nfsd4_access
,
1032 .op_name
= "OP_ACCESS",
1035 .op_func
= (nfsd4op_func
)nfsd4_close
,
1036 .op_name
= "OP_CLOSE",
1039 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1040 .op_name
= "OP_COMMIT",
1043 .op_func
= (nfsd4op_func
)nfsd4_create
,
1044 .op_name
= "OP_CREATE",
1046 [OP_DELEGRETURN
] = {
1047 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1048 .op_name
= "OP_DELEGRETURN",
1051 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1052 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1053 .op_name
= "OP_GETATTR",
1056 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1057 .op_name
= "OP_GETFH",
1060 .op_func
= (nfsd4op_func
)nfsd4_link
,
1061 .op_name
= "OP_LINK",
1064 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1065 .op_name
= "OP_LOCK",
1068 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1069 .op_name
= "OP_LOCKT",
1072 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1073 .op_name
= "OP_LOCKU",
1076 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1077 .op_name
= "OP_LOOKUP",
1080 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1081 .op_name
= "OP_LOOKUPP",
1084 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1085 .op_name
= "OP_NVERIFY",
1088 .op_func
= (nfsd4op_func
)nfsd4_open
,
1089 .op_name
= "OP_OPEN",
1091 [OP_OPEN_CONFIRM
] = {
1092 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1093 .op_name
= "OP_OPEN_CONFIRM",
1095 [OP_OPEN_DOWNGRADE
] = {
1096 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1097 .op_name
= "OP_OPEN_DOWNGRADE",
1100 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1101 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1102 .op_name
= "OP_PUTFH",
1105 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1106 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1107 .op_name
= "OP_PUTPUBFH",
1110 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1111 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1112 .op_name
= "OP_PUTROOTFH",
1115 .op_func
= (nfsd4op_func
)nfsd4_read
,
1116 .op_name
= "OP_READ",
1119 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1120 .op_name
= "OP_READDIR",
1123 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1124 .op_name
= "OP_READLINK",
1127 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1128 .op_name
= "OP_REMOVE",
1131 .op_name
= "OP_RENAME",
1132 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1135 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1136 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1137 .op_name
= "OP_RENEW",
1140 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1141 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1142 .op_name
= "OP_RESTOREFH",
1145 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1146 .op_name
= "OP_SAVEFH",
1149 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1150 .op_name
= "OP_SECINFO",
1153 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1154 .op_name
= "OP_SETATTR",
1156 [OP_SETCLIENTID
] = {
1157 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1158 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1159 .op_name
= "OP_SETCLIENTID",
1161 [OP_SETCLIENTID_CONFIRM
] = {
1162 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1163 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1164 .op_name
= "OP_SETCLIENTID_CONFIRM",
1167 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1168 .op_name
= "OP_VERIFY",
1171 .op_func
= (nfsd4op_func
)nfsd4_write
,
1172 .op_name
= "OP_WRITE",
1174 [OP_RELEASE_LOCKOWNER
] = {
1175 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1176 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
,
1177 .op_name
= "OP_RELEASE_LOCKOWNER",
1180 /* NFSv4.1 operations */
1181 [OP_EXCHANGE_ID
] = {
1182 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1183 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1184 .op_name
= "OP_EXCHANGE_ID",
1186 [OP_CREATE_SESSION
] = {
1187 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1188 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1189 .op_name
= "OP_CREATE_SESSION",
1191 [OP_DESTROY_SESSION
] = {
1192 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1193 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1194 .op_name
= "OP_DESTROY_SESSION",
1197 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1198 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1199 .op_name
= "OP_SEQUENCE",
1203 static const char *nfsd4_op_name(unsigned opnum
)
1205 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1206 return nfsd4_ops
[opnum
].op_name
;
1207 return "unknown_operation";
1210 #define nfs4svc_decode_voidargs NULL
1211 #define nfs4svc_release_void NULL
1212 #define nfsd4_voidres nfsd4_voidargs
1213 #define nfs4svc_release_compound NULL
1214 struct nfsd4_voidargs
{ int dummy
; };
1216 #define PROC(name, argt, rest, relt, cache, respsize) \
1217 { (svc_procfunc) nfsd4_proc_##name, \
1218 (kxdrproc_t) nfs4svc_decode_##argt##args, \
1219 (kxdrproc_t) nfs4svc_encode_##rest##res, \
1220 (kxdrproc_t) nfs4svc_release_##relt, \
1221 sizeof(struct nfsd4_##argt##args), \
1222 sizeof(struct nfsd4_##rest##res), \
1229 * TODO: At the present time, the NFSv4 server does not do XID caching
1230 * of requests. Implementing XID caching would not be a serious problem,
1231 * although it would require a mild change in interfaces since one
1232 * doesn't know whether an NFSv4 request is idempotent until after the
1233 * XDR decode. However, XID caching totally confuses pynfs (Peter
1234 * Astrand's regression testsuite for NFSv4 servers), which reuses
1235 * XID's liberally, so I've left it unimplemented until pynfs generates
1238 static struct svc_procedure nfsd_procedures4
[2] = {
1239 PROC(null
, void, void, void, RC_NOCACHE
, 1),
1240 PROC(compound
, compound
, compound
, compound
, RC_NOCACHE
, NFSD_BUFSIZE
/4)
1243 struct svc_version nfsd_version4
= {
1246 .vs_proc
= nfsd_procedures4
,
1247 .vs_dispatch
= nfsd_dispatch
,
1248 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,