2 * Server-side procedures for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
36 #include <linux/slab.h>
42 #include "current_stateid.h"
45 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
46 #include <linux/security.h>
49 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
51 struct inode
*inode
= resfh
->fh_dentry
->d_inode
;
54 mutex_lock(&inode
->i_mutex
);
55 status
= security_inode_setsecctx(resfh
->fh_dentry
,
56 label
->data
, label
->len
);
57 mutex_unlock(&inode
->i_mutex
);
61 * XXX: We should really fail the whole open, but we may
62 * already have created a new file, so it may be too
63 * late. For now this seems the least of evils:
65 bmval
[2] &= ~FATTR4_WORD2_SECURITY_LABEL
;
71 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
75 #define NFSDDBG_FACILITY NFSDDBG_PROC
77 static u32 nfsd_attrmask
[] = {
78 NFSD_WRITEABLE_ATTRS_WORD0
,
79 NFSD_WRITEABLE_ATTRS_WORD1
,
80 NFSD_WRITEABLE_ATTRS_WORD2
83 static u32 nfsd41_ex_attrmask
[] = {
84 NFSD_SUPPATTR_EXCLCREAT_WORD0
,
85 NFSD_SUPPATTR_EXCLCREAT_WORD1
,
86 NFSD_SUPPATTR_EXCLCREAT_WORD2
90 check_attr_support(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
91 u32
*bmval
, u32
*writable
)
93 struct dentry
*dentry
= cstate
->current_fh
.fh_dentry
;
96 * Check about attributes are supported by the NFSv4 server or not.
97 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
99 if ((bmval
[0] & ~nfsd_suppattrs0(cstate
->minorversion
)) ||
100 (bmval
[1] & ~nfsd_suppattrs1(cstate
->minorversion
)) ||
101 (bmval
[2] & ~nfsd_suppattrs2(cstate
->minorversion
)))
102 return nfserr_attrnotsupp
;
105 * Check FATTR4_WORD0_ACL can be supported
106 * in current environment or not.
108 if (bmval
[0] & FATTR4_WORD0_ACL
) {
109 if (!IS_POSIXACL(dentry
->d_inode
))
110 return nfserr_attrnotsupp
;
114 * According to spec, read-only attributes return ERR_INVAL.
117 if ((bmval
[0] & ~writable
[0]) || (bmval
[1] & ~writable
[1]) ||
118 (bmval
[2] & ~writable
[2]))
126 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
127 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
129 __be32 status
= nfs_ok
;
131 if (open
->op_create
== NFS4_OPEN_CREATE
) {
132 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
133 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
134 status
= check_attr_support(rqstp
, cstate
,
135 open
->op_bmval
, nfsd_attrmask
);
136 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
137 status
= check_attr_support(rqstp
, cstate
,
138 open
->op_bmval
, nfsd41_ex_attrmask
);
145 is_create_with_attrs(struct nfsd4_open
*open
)
147 return open
->op_create
== NFS4_OPEN_CREATE
148 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
149 || open
->op_createmode
== NFS4_CREATE_GUARDED
150 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
154 * if error occurs when setting the acl, just clear the acl bit
155 * in the returned attr bitmap.
158 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
159 struct nfs4_acl
*acl
, u32
*bmval
)
163 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
166 * We should probably fail the whole open at this point,
167 * but we've already created the file, so it's too late;
168 * So this seems the least of evils:
170 bmval
[0] &= ~FATTR4_WORD0_ACL
;
174 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
177 dget(src
->fh_dentry
);
179 cache_get(&src
->fh_export
->h
);
184 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
188 if (open
->op_truncate
&&
189 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
192 accmode
|= NFSD_MAY_READ_IF_EXEC
;
194 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
195 accmode
|= NFSD_MAY_READ
;
196 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
197 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
198 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
199 accmode
|= NFSD_MAY_WRITE
;
201 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
206 static __be32
nfsd_check_obj_isreg(struct svc_fh
*fh
)
208 umode_t mode
= fh
->fh_dentry
->d_inode
->i_mode
;
215 * Using err_symlink as our catch-all case may look odd; but
216 * there's no other obvious error for this case in 4.0, and we
217 * happen to know that it will cause the linux v4 client to do
218 * the right thing on attempts to open something other than a
221 return nfserr_symlink
;
224 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
*resfh
)
226 if (nfsd4_has_session(cstate
))
228 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
233 do_open_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
235 struct svc_fh
*current_fh
= &cstate
->current_fh
;
236 struct svc_fh
*resfh
;
240 resfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
242 return nfserr_jukebox
;
243 fh_init(resfh
, NFS4_FHSIZE
);
244 open
->op_truncate
= 0;
246 if (open
->op_create
) {
247 /* FIXME: check session persistence and pnfs flags.
248 * The nfsv4.1 spec requires the following semantics:
250 * Persistent | pNFS | Server REQUIRED | Client Allowed
251 * Reply Cache | server | |
252 * -------------+--------+-----------------+--------------------
253 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
255 * | | and EXCLUSIVE4 | or EXCLUSIVE4
257 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
258 * yes | no | GUARDED4 | GUARDED4
259 * yes | yes | GUARDED4 | GUARDED4
263 * Note: create modes (UNCHECKED,GUARDED...) are the same
264 * in NFSv4 as in v3 except EXCLUSIVE4_1.
266 status
= do_nfsd_create(rqstp
, current_fh
, open
->op_fname
.data
,
267 open
->op_fname
.len
, &open
->op_iattr
,
268 resfh
, open
->op_createmode
,
269 (u32
*)open
->op_verf
.data
,
270 &open
->op_truncate
, &open
->op_created
);
272 if (!status
&& open
->op_label
.len
)
273 nfsd4_security_inode_setsecctx(resfh
, &open
->op_label
, open
->op_bmval
);
276 * Following rfc 3530 14.2.16, use the returned bitmask
277 * to indicate which attributes we used to store the
280 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
281 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
282 FATTR4_WORD1_TIME_MODIFY
);
284 status
= nfsd_lookup(rqstp
, current_fh
,
285 open
->op_fname
.data
, open
->op_fname
.len
, resfh
);
286 fh_unlock(current_fh
);
290 status
= nfsd_check_obj_isreg(resfh
);
294 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
295 do_set_nfs4_acl(rqstp
, resfh
, open
->op_acl
, open
->op_bmval
);
297 nfsd4_set_open_owner_reply_cache(cstate
, open
, resfh
);
298 accmode
= NFSD_MAY_NOP
;
299 if (open
->op_created
||
300 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
301 accmode
|= NFSD_MAY_OWNER_OVERRIDE
;
302 status
= do_open_permission(rqstp
, resfh
, open
, accmode
);
303 set_change_info(&open
->op_cinfo
, current_fh
);
304 fh_dup2(current_fh
, resfh
);
312 do_open_fhandle(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
314 struct svc_fh
*current_fh
= &cstate
->current_fh
;
318 /* We don't know the target directory, and therefore can not
319 * set the change info
322 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
324 nfsd4_set_open_owner_reply_cache(cstate
, open
, current_fh
);
326 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
327 (open
->op_iattr
.ia_size
== 0);
329 * In the delegation case, the client is telling us about an
330 * open that it *already* performed locally, some time ago. We
331 * should let it succeed now if possible.
333 * In the case of a CLAIM_FH open, on the other hand, the client
334 * may be counting on us to enforce permissions (the Linux 4.1
335 * client uses this for normal opens, for example).
337 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
)
338 accmode
= NFSD_MAY_OWNER_OVERRIDE
;
340 status
= do_open_permission(rqstp
, current_fh
, open
, accmode
);
346 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
348 struct nfsd4_sessionid
*sid
=
349 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
351 clid
->cl_boot
= sid
->clientid
.cl_boot
;
352 clid
->cl_id
= sid
->clientid
.cl_id
;
356 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
357 struct nfsd4_open
*open
)
360 struct nfsd4_compoundres
*resp
;
361 struct net
*net
= SVC_NET(rqstp
);
362 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
364 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
365 (int)open
->op_fname
.len
, open
->op_fname
.data
,
368 /* This check required by spec. */
369 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
372 open
->op_created
= 0;
375 * Before RECLAIM_COMPLETE done, server should deny new lock
377 if (nfsd4_has_session(cstate
) &&
378 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
379 &cstate
->session
->se_client
->cl_flags
) &&
380 open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
383 if (nfsd4_has_session(cstate
))
384 copy_clientid(&open
->op_clientid
, cstate
->session
);
388 /* check seqid for replay. set nfs4_owner */
389 resp
= rqstp
->rq_resp
;
390 status
= nfsd4_process_open1(&resp
->cstate
, open
, nn
);
391 if (status
== nfserr_replay_me
) {
392 struct nfs4_replay
*rp
= &open
->op_openowner
->oo_owner
.so_replay
;
393 fh_put(&cstate
->current_fh
);
394 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
396 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
398 dprintk("nfsd4_open: replay failed"
399 " restoring previous filehandle\n");
401 status
= nfserr_replay_me
;
405 if (open
->op_xdr_error
) {
406 status
= open
->op_xdr_error
;
410 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
414 /* Openowner is now set, so sequence id will get bumped. Now we need
415 * these checks before we do any creates: */
416 status
= nfserr_grace
;
417 if (locks_in_grace(net
) && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
419 status
= nfserr_no_grace
;
420 if (!locks_in_grace(net
) && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
423 switch (open
->op_claim_type
) {
424 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
425 case NFS4_OPEN_CLAIM_NULL
:
426 status
= do_open_lookup(rqstp
, cstate
, open
);
430 case NFS4_OPEN_CLAIM_PREVIOUS
:
431 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
432 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
433 cstate
->minorversion
,
437 case NFS4_OPEN_CLAIM_FH
:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
439 status
= do_open_fhandle(rqstp
, cstate
, open
);
443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
444 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
445 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
446 dprintk("NFSD: unsupported OPEN claim type %d\n",
447 open
->op_claim_type
);
448 status
= nfserr_notsupp
;
451 dprintk("NFSD: Invalid OPEN claim type %d\n",
452 open
->op_claim_type
);
453 status
= nfserr_inval
;
457 * nfsd4_process_open2() does the actual opening of the file. If
458 * successful, it (1) truncates the file if open->op_truncate was
459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
461 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
462 WARN_ON(status
&& open
->op_created
);
464 nfsd4_cleanup_open_state(open
, status
);
465 if (open
->op_openowner
&& !nfsd4_has_session(cstate
))
466 cstate
->replay_owner
= &open
->op_openowner
->oo_owner
;
467 nfsd4_bump_seqid(cstate
, status
);
468 if (!cstate
->replay_owner
)
474 * OPEN is the only seqid-mutating operation whose decoding can fail
475 * with a seqid-mutating error (specifically, decoding of user names in
476 * the attributes). Therefore we have to do some processing to look up
477 * the stateowner so that we can bump the seqid.
479 static __be32
nfsd4_open_omfg(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_op
*op
)
481 struct nfsd4_open
*open
= (struct nfsd4_open
*)&op
->u
;
483 if (!seqid_mutating_err(ntohl(op
->status
)))
485 if (nfsd4_has_session(cstate
))
487 open
->op_xdr_error
= op
->status
;
488 return nfsd4_open(rqstp
, cstate
, open
);
492 * filehandle-manipulating ops.
495 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
496 struct svc_fh
**getfh
)
498 if (!cstate
->current_fh
.fh_dentry
)
499 return nfserr_nofilehandle
;
501 *getfh
= &cstate
->current_fh
;
506 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
507 struct nfsd4_putfh
*putfh
)
509 fh_put(&cstate
->current_fh
);
510 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
511 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
513 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
517 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
522 fh_put(&cstate
->current_fh
);
523 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
528 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
531 if (!cstate
->save_fh
.fh_dentry
)
532 return nfserr_restorefh
;
534 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
535 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
536 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
537 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
543 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
546 if (!cstate
->current_fh
.fh_dentry
)
547 return nfserr_nofilehandle
;
549 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
550 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
551 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
552 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
561 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
562 struct nfsd4_access
*access
)
564 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
567 access
->ac_resp_access
= access
->ac_req_access
;
568 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
569 &access
->ac_supported
);
572 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
575 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
577 verf
[0] = (__be32
)nn
->nfssvc_boot
.tv_sec
;
578 verf
[1] = (__be32
)nn
->nfssvc_boot
.tv_usec
;
579 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
583 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
584 struct nfsd4_commit
*commit
)
586 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
587 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
592 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
593 struct nfsd4_create
*create
)
599 fh_init(&resfh
, NFS4_FHSIZE
);
601 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
606 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
611 switch (create
->cr_type
) {
613 /* ugh! we have to null-terminate the linktext, or
614 * vfs_symlink() will choke. it is always safe to
615 * null-terminate by brute force, since at worst we
616 * will overwrite the first byte of the create namelen
617 * in the XDR buffer, which has already been extracted
620 create
->cr_linkname
[create
->cr_linklen
] = 0;
622 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
623 create
->cr_name
, create
->cr_namelen
,
624 create
->cr_linkname
, create
->cr_linklen
,
625 &resfh
, &create
->cr_iattr
);
629 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
630 if (MAJOR(rdev
) != create
->cr_specdata1
||
631 MINOR(rdev
) != create
->cr_specdata2
)
633 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
634 create
->cr_name
, create
->cr_namelen
,
635 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
639 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
640 if (MAJOR(rdev
) != create
->cr_specdata1
||
641 MINOR(rdev
) != create
->cr_specdata2
)
643 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
644 create
->cr_name
, create
->cr_namelen
,
645 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
649 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
650 create
->cr_name
, create
->cr_namelen
,
651 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
655 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
656 create
->cr_name
, create
->cr_namelen
,
657 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
661 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
662 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
663 create
->cr_name
, create
->cr_namelen
,
664 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
668 status
= nfserr_badtype
;
674 if (create
->cr_label
.len
)
675 nfsd4_security_inode_setsecctx(&resfh
, &create
->cr_label
, create
->cr_bmval
);
677 if (create
->cr_acl
!= NULL
)
678 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
681 fh_unlock(&cstate
->current_fh
);
682 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
683 fh_dup2(&cstate
->current_fh
, &resfh
);
690 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
691 struct nfsd4_getattr
*getattr
)
695 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
699 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
702 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
703 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
704 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
706 getattr
->ga_fhp
= &cstate
->current_fh
;
711 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
712 struct nfsd4_link
*link
)
714 __be32 status
= nfserr_nofilehandle
;
716 if (!cstate
->save_fh
.fh_dentry
)
718 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
719 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
721 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
725 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
727 struct svc_fh tmp_fh
;
730 fh_init(&tmp_fh
, NFS4_FHSIZE
);
731 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
734 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
739 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
743 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
746 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
750 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
751 struct nfsd4_lookup
*lookup
)
753 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
754 lookup
->lo_name
, lookup
->lo_len
,
755 &cstate
->current_fh
);
759 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
760 struct nfsd4_read
*read
)
764 /* no need to check permission - this will be done in nfsd_read() */
766 read
->rd_filp
= NULL
;
767 if (read
->rd_offset
>= OFFSET_MAX
)
771 * If we do a zero copy read, then a client will see read data
772 * that reflects the state of the file *after* performing the
773 * following compound.
775 * To ensure proper ordering, we therefore turn off zero copy if
776 * the client wants us to do more in this compound:
778 if (!nfsd4_last_compound_op(rqstp
))
779 rqstp
->rq_splice_ok
= false;
783 if ((status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
784 cstate
, &read
->rd_stateid
,
785 RD_STATE
, &read
->rd_filp
))) {
786 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
790 get_file(read
->rd_filp
);
794 read
->rd_rqstp
= rqstp
;
795 read
->rd_fhp
= &cstate
->current_fh
;
800 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
801 struct nfsd4_readdir
*readdir
)
803 u64 cookie
= readdir
->rd_cookie
;
804 static const nfs4_verifier zeroverf
;
806 /* no need to check permission - this will be done in nfsd_readdir() */
808 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
811 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
812 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
813 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
815 if ((cookie
== 1) || (cookie
== 2) ||
816 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
817 return nfserr_bad_cookie
;
819 readdir
->rd_rqstp
= rqstp
;
820 readdir
->rd_fhp
= &cstate
->current_fh
;
825 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
826 struct nfsd4_readlink
*readlink
)
828 readlink
->rl_rqstp
= rqstp
;
829 readlink
->rl_fhp
= &cstate
->current_fh
;
834 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
835 struct nfsd4_remove
*remove
)
839 if (locks_in_grace(SVC_NET(rqstp
)))
841 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
842 remove
->rm_name
, remove
->rm_namelen
);
844 fh_unlock(&cstate
->current_fh
);
845 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
851 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
852 struct nfsd4_rename
*rename
)
854 __be32 status
= nfserr_nofilehandle
;
856 if (!cstate
->save_fh
.fh_dentry
)
858 if (locks_in_grace(SVC_NET(rqstp
)) &&
859 !(cstate
->save_fh
.fh_export
->ex_flags
& NFSEXP_NOSUBTREECHECK
))
861 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
862 rename
->rn_snamelen
, &cstate
->current_fh
,
863 rename
->rn_tname
, rename
->rn_tnamelen
);
866 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
867 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
872 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
873 struct nfsd4_secinfo
*secinfo
)
876 struct svc_export
*exp
;
877 struct dentry
*dentry
;
880 fh_init(&resfh
, NFS4_FHSIZE
);
881 err
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_EXEC
);
884 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
885 secinfo
->si_name
, secinfo
->si_namelen
,
889 if (dentry
->d_inode
== NULL
) {
893 secinfo
->si_exp
= exp
;
895 if (cstate
->minorversion
)
896 /* See rfc 5661 section 2.6.3.1.1.8 */
897 fh_put(&cstate
->current_fh
);
902 nfsd4_secinfo_no_name(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
903 struct nfsd4_secinfo_no_name
*sin
)
907 switch (sin
->sin_style
) {
908 case NFS4_SECINFO_STYLE4_CURRENT_FH
:
910 case NFS4_SECINFO_STYLE4_PARENT
:
911 err
= nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
918 exp_get(cstate
->current_fh
.fh_export
);
919 sin
->sin_exp
= cstate
->current_fh
.fh_export
;
920 fh_put(&cstate
->current_fh
);
925 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
926 struct nfsd4_setattr
*setattr
)
928 __be32 status
= nfs_ok
;
931 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
933 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
934 &setattr
->sa_stateid
, WR_STATE
, NULL
);
937 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
941 err
= fh_want_write(&cstate
->current_fh
);
943 return nfserrno(err
);
946 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
951 if (setattr
->sa_acl
!= NULL
)
952 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
956 if (setattr
->sa_label
.len
)
957 status
= nfsd4_set_nfs4_label(rqstp
, &cstate
->current_fh
,
961 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
964 fh_drop_write(&cstate
->current_fh
);
968 static int fill_in_write_vector(struct kvec
*vec
, struct nfsd4_write
*write
)
971 int buflen
= write
->wr_buflen
;
973 vec
[0].iov_base
= write
->wr_head
.iov_base
;
974 vec
[0].iov_len
= min_t(int, buflen
, write
->wr_head
.iov_len
);
975 buflen
-= vec
[0].iov_len
;
978 vec
[i
].iov_base
= page_address(write
->wr_pagelist
[i
- 1]);
979 vec
[i
].iov_len
= min_t(int, PAGE_SIZE
, buflen
);
980 buflen
-= vec
[i
].iov_len
;
987 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
988 struct nfsd4_write
*write
)
990 stateid_t
*stateid
= &write
->wr_stateid
;
991 struct file
*filp
= NULL
;
992 __be32 status
= nfs_ok
;
996 /* no need to check permission - this will be done in nfsd_write() */
998 if (write
->wr_offset
>= OFFSET_MAX
)
1002 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
1003 cstate
, stateid
, WR_STATE
, &filp
);
1005 nfs4_unlock_state();
1006 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1011 nfs4_unlock_state();
1013 cnt
= write
->wr_buflen
;
1014 write
->wr_how_written
= write
->wr_stable_how
;
1015 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
1017 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
1018 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
1020 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
1021 write
->wr_offset
, rqstp
->rq_vec
, nvecs
,
1022 &cnt
, &write
->wr_how_written
);
1026 write
->wr_bytes_written
= cnt
;
1031 /* This routine never returns NFS_OK! If there are no other errors, it
1032 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1033 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1034 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1037 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1038 struct nfsd4_verify
*verify
)
1044 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
1048 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
1052 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
1053 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
1054 return nfserr_inval
;
1055 if (verify
->ve_attrlen
& 3)
1056 return nfserr_inval
;
1059 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1061 count
= 4 + (verify
->ve_attrlen
>> 2);
1062 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
1064 return nfserr_jukebox
;
1067 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
1068 cstate
->current_fh
.fh_export
,
1069 cstate
->current_fh
.fh_dentry
, &p
,
1070 count
, verify
->ve_bmval
,
1073 /* this means that nfsd4_encode_fattr() ran out of space */
1074 if (status
== nfserr_resource
)
1075 status
= nfserr_not_same
;
1080 p
= buf
+ 1 + ntohl(buf
[0]);
1081 status
= nfserr_not_same
;
1082 if (ntohl(*p
++) != verify
->ve_attrlen
)
1084 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1085 status
= nfserr_same
;
1093 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1094 struct nfsd4_verify
*verify
)
1098 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1099 return status
== nfserr_not_same
? nfs_ok
: status
;
1103 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1104 struct nfsd4_verify
*verify
)
1108 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1109 return status
== nfserr_same
? nfs_ok
: status
;
1116 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
1121 static inline void nfsd4_increment_op_stats(u32 opnum
)
1123 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1124 nfsdstats
.nfs4_opcount
[opnum
]++;
1127 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
1129 typedef u32(*nfsd4op_rsize
)(struct svc_rqst
*, struct nfsd4_op
*op
);
1130 typedef void(*stateid_setter
)(struct nfsd4_compound_state
*, void *);
1131 typedef void(*stateid_getter
)(struct nfsd4_compound_state
*, void *);
1133 enum nfsd4_op_flags
{
1134 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
1135 ALLOWED_ON_ABSENT_FS
= 1 << 1, /* ops processed on absent fs */
1136 ALLOWED_AS_FIRST_OP
= 1 << 2, /* ops reqired first in compound */
1137 /* For rfc 5661 section 2.6.3.1.1: */
1138 OP_HANDLES_WRONGSEC
= 1 << 3,
1139 OP_IS_PUTFH_LIKE
= 1 << 4,
1141 * These are the ops whose result size we estimate before
1142 * encoding, to avoid performing an op then not being able to
1143 * respond or cache a response. This includes writes and setattrs
1144 * as well as the operations usually called "nonidempotent":
1146 OP_MODIFIES_SOMETHING
= 1 << 5,
1148 * Cache compounds containing these ops in the xid-based drc:
1149 * We use the DRC for compounds containing non-idempotent
1150 * operations, *except* those that are 4.1-specific (since
1151 * sessions provide their own EOS), and except for stateful
1152 * operations other than setclientid and setclientid_confirm
1153 * (since sequence numbers provide EOS for open, lock, etc in
1156 OP_CACHEME
= 1 << 6,
1158 * These are ops which clear current state id.
1160 OP_CLEAR_STATEID
= 1 << 7,
1163 struct nfsd4_operation
{
1164 nfsd4op_func op_func
;
1167 /* Try to get response size before operation */
1168 nfsd4op_rsize op_rsize_bop
;
1169 stateid_getter op_get_currentstateid
;
1170 stateid_setter op_set_currentstateid
;
1173 static struct nfsd4_operation nfsd4_ops
[];
1176 static const char *nfsd4_op_name(unsigned opnum
);
1180 * Enforce NFSv4.1 COMPOUND ordering rules:
1182 * Also note, enforced elsewhere:
1183 * - SEQUENCE other than as first op results in
1184 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1185 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1186 * (Enforced in nfsd4_bind_conn_to_session().)
1187 * - DESTROY_SESSION must be the final operation in a compound, if
1188 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1189 * (Enforced in nfsd4_destroy_session().)
1191 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1193 struct nfsd4_op
*op
= &args
->ops
[0];
1195 /* These ordering requirements don't apply to NFSv4.0: */
1196 if (args
->minorversion
== 0)
1198 /* This is weird, but OK, not our problem: */
1199 if (args
->opcnt
== 0)
1201 if (op
->status
== nfserr_op_illegal
)
1203 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1204 return nfserr_op_not_in_session
;
1205 if (op
->opnum
== OP_SEQUENCE
)
1207 if (args
->opcnt
!= 1)
1208 return nfserr_not_only_op
;
1212 static inline struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1214 return &nfsd4_ops
[op
->opnum
];
1217 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1219 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1222 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1224 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1225 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1226 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1227 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1228 struct nfsd4_operation
*thisd
;
1229 struct nfsd4_operation
*nextd
;
1231 thisd
= OPDESC(this);
1233 * Most ops check wronsec on our own; only the putfh-like ops
1234 * have special rules.
1236 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1239 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1240 * put-filehandle operation if we're not going to use the
1243 if (argp
->opcnt
== resp
->opcnt
)
1246 nextd
= OPDESC(next
);
1248 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1249 * errors themselves as necessary; others should check for them
1252 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1259 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1260 struct nfsd4_compoundargs
*args
,
1261 struct nfsd4_compoundres
*resp
)
1263 struct nfsd4_op
*op
;
1264 struct nfsd4_operation
*opdesc
;
1265 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1270 resp
->xbuf
= &rqstp
->rq_res
;
1271 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+
1272 rqstp
->rq_res
.head
[0].iov_len
;
1273 resp
->tagp
= resp
->p
;
1274 /* reserve space for: taglen, tag, and opcnt */
1275 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
1276 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
1277 resp
->taglen
= args
->taglen
;
1278 resp
->tag
= args
->tag
;
1280 resp
->rqstp
= rqstp
;
1281 resp
->cstate
.minorversion
= args
->minorversion
;
1282 resp
->cstate
.replay_owner
= NULL
;
1283 resp
->cstate
.session
= NULL
;
1284 fh_init(&resp
->cstate
.current_fh
, NFS4_FHSIZE
);
1285 fh_init(&resp
->cstate
.save_fh
, NFS4_FHSIZE
);
1287 * Don't use the deferral mechanism for NFSv4; compounds make it
1288 * too hard to avoid non-idempotency problems.
1290 rqstp
->rq_usedeferral
= 0;
1293 * According to RFC3010, this takes precedence over all other errors.
1295 status
= nfserr_minor_vers_mismatch
;
1296 if (nfsd_minorversion(args
->minorversion
, NFSD_TEST
) <= 0)
1299 status
= nfs41_check_op_ordering(args
);
1302 op
->status
= status
;
1306 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1307 op
= &args
->ops
[resp
->opcnt
++];
1309 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1310 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1311 nfsd4_op_name(op
->opnum
));
1313 * The XDR decode routines may have pre-set op->status;
1314 * for example, if there is a miscellaneous XDR error
1315 * it will be set to nfserr_bad_xdr.
1318 if (op
->opnum
== OP_OPEN
)
1319 op
->status
= nfsd4_open_omfg(rqstp
, cstate
, op
);
1323 /* We must be able to encode a successful response to
1324 * this operation, with enough room left over to encode a
1325 * failed response to the next operation. If we don't
1326 * have enough room, fail with ERR_RESOURCE.
1328 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
1329 if (slack_bytes
< COMPOUND_SLACK_SPACE
1330 + COMPOUND_ERR_SLACK_SPACE
) {
1331 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
1332 op
->status
= nfserr_resource
;
1336 opdesc
= OPDESC(op
);
1338 if (!cstate
->current_fh
.fh_dentry
) {
1339 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1340 op
->status
= nfserr_nofilehandle
;
1343 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
1344 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1345 op
->status
= nfserr_moved
;
1349 /* If op is non-idempotent */
1350 if (opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1351 plen
= opdesc
->op_rsize_bop(rqstp
, op
);
1352 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1358 if (opdesc
->op_get_currentstateid
)
1359 opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1360 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1363 if (opdesc
->op_set_currentstateid
)
1364 opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1366 if (opdesc
->op_flags
& OP_CLEAR_STATEID
)
1367 clear_current_stateid(cstate
);
1369 if (need_wrongsec_check(rqstp
))
1370 op
->status
= check_nfsd_access(cstate
->current_fh
.fh_export
, rqstp
);
1374 /* Only from SEQUENCE */
1375 if (resp
->cstate
.status
== nfserr_replay_cache
) {
1376 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1377 status
= op
->status
;
1380 if (op
->status
== nfserr_replay_me
) {
1381 op
->replay
= &cstate
->replay_owner
->so_replay
;
1382 nfsd4_encode_replay(resp
, op
);
1383 status
= op
->status
= op
->replay
->rp_status
;
1385 nfsd4_encode_operation(resp
, op
);
1386 status
= op
->status
;
1389 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1390 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1391 be32_to_cpu(status
));
1393 if (cstate
->replay_owner
) {
1394 nfs4_unlock_state();
1395 cstate
->replay_owner
= NULL
;
1397 /* XXX Ugh, we need to get rid of this kind of special case: */
1398 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1399 fput(op
->u
.read
.rd_filp
);
1401 nfsd4_increment_op_stats(op
->opnum
);
1404 resp
->cstate
.status
= status
;
1405 fh_put(&resp
->cstate
.current_fh
);
1406 fh_put(&resp
->cstate
.save_fh
);
1407 BUG_ON(resp
->cstate
.replay_owner
);
1409 /* Reset deferral mechanism for RPC deferrals */
1410 rqstp
->rq_usedeferral
= 1;
1411 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1415 #define op_encode_hdr_size (2)
1416 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1417 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1418 #define op_encode_change_info_maxsz (5)
1419 #define nfs4_fattr_bitmap_maxsz (4)
1421 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1422 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1424 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1426 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1427 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1428 op_encode_ace_maxsz)
1430 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1432 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1434 return (op_encode_hdr_size
) * sizeof(__be32
);
1437 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1439 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1442 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1444 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1447 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1449 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1450 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1453 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1455 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1459 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1461 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1465 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1467 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1468 + op_encode_change_info_maxsz
+ 1
1469 + nfs4_fattr_bitmap_maxsz
1470 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1473 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1475 u32 maxcount
= 0, rlen
= 0;
1477 maxcount
= svc_max_payload(rqstp
);
1478 rlen
= op
->u
.read
.rd_length
;
1480 if (rlen
> maxcount
)
1483 return (op_encode_hdr_size
+ 2) * sizeof(__be32
) + rlen
;
1486 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1488 u32 rlen
= op
->u
.readdir
.rd_maxcount
;
1490 if (rlen
> PAGE_SIZE
)
1493 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
)
1494 * sizeof(__be32
) + rlen
;
1497 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1499 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1503 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1505 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1506 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1509 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1511 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1514 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1516 return (op_encode_hdr_size
+ 2 + 1024) * sizeof(__be32
);
1519 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1521 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1524 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1526 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
1527 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1528 2 + /*eir_server_owner.so_minor_id */\
1529 /* eir_server_owner.so_major_id<> */\
1530 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1531 /* eir_server_scope<> */\
1532 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1533 1 + /* eir_server_impl_id array length */\
1534 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
1537 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1539 return (op_encode_hdr_size
+ \
1540 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
1541 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
1544 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1546 return (op_encode_hdr_size
+ \
1547 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
1548 2 + /* csr_sequence, csr_flags */\
1549 op_encode_channel_attrs_maxsz
+ \
1550 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
1553 static struct nfsd4_operation nfsd4_ops
[] = {
1555 .op_func
= (nfsd4op_func
)nfsd4_access
,
1556 .op_name
= "OP_ACCESS",
1559 .op_func
= (nfsd4op_func
)nfsd4_close
,
1560 .op_flags
= OP_MODIFIES_SOMETHING
,
1561 .op_name
= "OP_CLOSE",
1562 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1563 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_closestateid
,
1564 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_closestateid
,
1567 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1568 .op_flags
= OP_MODIFIES_SOMETHING
,
1569 .op_name
= "OP_COMMIT",
1570 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_commit_rsize
,
1573 .op_func
= (nfsd4op_func
)nfsd4_create
,
1574 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
1575 .op_name
= "OP_CREATE",
1576 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_rsize
,
1578 [OP_DELEGRETURN
] = {
1579 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1580 .op_flags
= OP_MODIFIES_SOMETHING
,
1581 .op_name
= "OP_DELEGRETURN",
1582 .op_rsize_bop
= nfsd4_only_status_rsize
,
1583 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_delegreturnstateid
,
1586 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1587 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1588 .op_name
= "OP_GETATTR",
1591 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1592 .op_name
= "OP_GETFH",
1595 .op_func
= (nfsd4op_func
)nfsd4_link
,
1596 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
1598 .op_name
= "OP_LINK",
1599 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_link_rsize
,
1602 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1603 .op_flags
= OP_MODIFIES_SOMETHING
,
1604 .op_name
= "OP_LOCK",
1605 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_lock_rsize
,
1606 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_lockstateid
,
1609 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1610 .op_name
= "OP_LOCKT",
1613 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1614 .op_flags
= OP_MODIFIES_SOMETHING
,
1615 .op_name
= "OP_LOCKU",
1616 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1617 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_lockustateid
,
1620 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1621 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1622 .op_name
= "OP_LOOKUP",
1625 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1626 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1627 .op_name
= "OP_LOOKUPP",
1630 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1631 .op_name
= "OP_NVERIFY",
1634 .op_func
= (nfsd4op_func
)nfsd4_open
,
1635 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1636 .op_name
= "OP_OPEN",
1637 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_open_rsize
,
1638 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_openstateid
,
1640 [OP_OPEN_CONFIRM
] = {
1641 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1642 .op_flags
= OP_MODIFIES_SOMETHING
,
1643 .op_name
= "OP_OPEN_CONFIRM",
1644 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1646 [OP_OPEN_DOWNGRADE
] = {
1647 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1648 .op_flags
= OP_MODIFIES_SOMETHING
,
1649 .op_name
= "OP_OPEN_DOWNGRADE",
1650 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1651 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_opendowngradestateid
,
1652 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_opendowngradestateid
,
1655 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1656 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1657 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
1659 .op_name
= "OP_PUTFH",
1660 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1663 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1664 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1665 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
1667 .op_name
= "OP_PUTPUBFH",
1668 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1671 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1672 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1673 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
1675 .op_name
= "OP_PUTROOTFH",
1676 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1679 .op_func
= (nfsd4op_func
)nfsd4_read
,
1680 .op_flags
= OP_MODIFIES_SOMETHING
,
1681 .op_name
= "OP_READ",
1682 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_read_rsize
,
1683 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_readstateid
,
1686 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1687 .op_flags
= OP_MODIFIES_SOMETHING
,
1688 .op_name
= "OP_READDIR",
1689 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_readdir_rsize
,
1692 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1693 .op_name
= "OP_READLINK",
1696 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1697 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1698 .op_name
= "OP_REMOVE",
1699 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_remove_rsize
,
1702 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1703 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1704 .op_name
= "OP_RENAME",
1705 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_rename_rsize
,
1708 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1709 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1710 | OP_MODIFIES_SOMETHING
,
1711 .op_name
= "OP_RENEW",
1712 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1716 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1717 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1718 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
1719 .op_name
= "OP_RESTOREFH",
1720 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1723 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1724 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1725 .op_name
= "OP_SAVEFH",
1726 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1729 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1730 .op_flags
= OP_HANDLES_WRONGSEC
,
1731 .op_name
= "OP_SECINFO",
1734 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1735 .op_name
= "OP_SETATTR",
1736 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1737 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setattr_rsize
,
1738 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_setattrstateid
,
1740 [OP_SETCLIENTID
] = {
1741 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1742 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1743 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1744 .op_name
= "OP_SETCLIENTID",
1745 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setclientid_rsize
,
1747 [OP_SETCLIENTID_CONFIRM
] = {
1748 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1749 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1750 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1751 .op_name
= "OP_SETCLIENTID_CONFIRM",
1752 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1755 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1756 .op_name
= "OP_VERIFY",
1759 .op_func
= (nfsd4op_func
)nfsd4_write
,
1760 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1761 .op_name
= "OP_WRITE",
1762 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1763 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_writestateid
,
1765 [OP_RELEASE_LOCKOWNER
] = {
1766 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1767 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1768 | OP_MODIFIES_SOMETHING
,
1769 .op_name
= "OP_RELEASE_LOCKOWNER",
1770 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1773 /* NFSv4.1 operations */
1774 [OP_EXCHANGE_ID
] = {
1775 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1776 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1777 | OP_MODIFIES_SOMETHING
,
1778 .op_name
= "OP_EXCHANGE_ID",
1779 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_exchange_id_rsize
,
1781 [OP_BACKCHANNEL_CTL
] = {
1782 .op_func
= (nfsd4op_func
)nfsd4_backchannel_ctl
,
1783 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1784 .op_name
= "OP_BACKCHANNEL_CTL",
1785 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1787 [OP_BIND_CONN_TO_SESSION
] = {
1788 .op_func
= (nfsd4op_func
)nfsd4_bind_conn_to_session
,
1789 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1790 | OP_MODIFIES_SOMETHING
,
1791 .op_name
= "OP_BIND_CONN_TO_SESSION",
1792 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_bind_conn_to_session_rsize
,
1794 [OP_CREATE_SESSION
] = {
1795 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1796 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1797 | OP_MODIFIES_SOMETHING
,
1798 .op_name
= "OP_CREATE_SESSION",
1799 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_session_rsize
,
1801 [OP_DESTROY_SESSION
] = {
1802 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1803 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1804 | OP_MODIFIES_SOMETHING
,
1805 .op_name
= "OP_DESTROY_SESSION",
1806 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1809 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1810 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1811 .op_name
= "OP_SEQUENCE",
1813 [OP_DESTROY_CLIENTID
] = {
1814 .op_func
= (nfsd4op_func
)nfsd4_destroy_clientid
,
1815 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1816 | OP_MODIFIES_SOMETHING
,
1817 .op_name
= "OP_DESTROY_CLIENTID",
1818 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1820 [OP_RECLAIM_COMPLETE
] = {
1821 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1822 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1823 .op_name
= "OP_RECLAIM_COMPLETE",
1824 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1826 [OP_SECINFO_NO_NAME
] = {
1827 .op_func
= (nfsd4op_func
)nfsd4_secinfo_no_name
,
1828 .op_flags
= OP_HANDLES_WRONGSEC
,
1829 .op_name
= "OP_SECINFO_NO_NAME",
1831 [OP_TEST_STATEID
] = {
1832 .op_func
= (nfsd4op_func
)nfsd4_test_stateid
,
1833 .op_flags
= ALLOWED_WITHOUT_FH
,
1834 .op_name
= "OP_TEST_STATEID",
1836 [OP_FREE_STATEID
] = {
1837 .op_func
= (nfsd4op_func
)nfsd4_free_stateid
,
1838 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1839 .op_name
= "OP_FREE_STATEID",
1840 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_freestateid
,
1841 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1846 static const char *nfsd4_op_name(unsigned opnum
)
1848 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1849 return nfsd4_ops
[opnum
].op_name
;
1850 return "unknown_operation";
1854 #define nfsd4_voidres nfsd4_voidargs
1855 struct nfsd4_voidargs
{ int dummy
; };
1857 static struct svc_procedure nfsd_procedures4
[2] = {
1859 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
1860 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
1861 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
1862 .pc_ressize
= sizeof(struct nfsd4_voidres
),
1863 .pc_cachetype
= RC_NOCACHE
,
1866 [NFSPROC4_COMPOUND
] = {
1867 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
1868 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
1869 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
1870 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
1871 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
1872 .pc_release
= nfsd4_release_compoundargs
,
1873 .pc_cachetype
= RC_NOCACHE
,
1874 .pc_xdrressize
= NFSD_BUFSIZE
/4,
1878 struct svc_version nfsd_version4
= {
1881 .vs_proc
= nfsd_procedures4
,
1882 .vs_dispatch
= nfsd_dispatch
,
1883 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,