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"
46 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
47 #include <linux/security.h>
50 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
52 struct inode
*inode
= resfh
->fh_dentry
->d_inode
;
55 mutex_lock(&inode
->i_mutex
);
56 status
= security_inode_setsecctx(resfh
->fh_dentry
,
57 label
->data
, label
->len
);
58 mutex_unlock(&inode
->i_mutex
);
62 * XXX: We should really fail the whole open, but we may
63 * already have created a new file, so it may be too
64 * late. For now this seems the least of evils:
66 bmval
[2] &= ~FATTR4_WORD2_SECURITY_LABEL
;
72 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
76 #define NFSDDBG_FACILITY NFSDDBG_PROC
78 static u32 nfsd_attrmask
[] = {
79 NFSD_WRITEABLE_ATTRS_WORD0
,
80 NFSD_WRITEABLE_ATTRS_WORD1
,
81 NFSD_WRITEABLE_ATTRS_WORD2
84 static u32 nfsd41_ex_attrmask
[] = {
85 NFSD_SUPPATTR_EXCLCREAT_WORD0
,
86 NFSD_SUPPATTR_EXCLCREAT_WORD1
,
87 NFSD_SUPPATTR_EXCLCREAT_WORD2
91 check_attr_support(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
92 u32
*bmval
, u32
*writable
)
94 struct dentry
*dentry
= cstate
->current_fh
.fh_dentry
;
97 * Check about attributes are supported by the NFSv4 server or not.
98 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
100 if ((bmval
[0] & ~nfsd_suppattrs0(cstate
->minorversion
)) ||
101 (bmval
[1] & ~nfsd_suppattrs1(cstate
->minorversion
)) ||
102 (bmval
[2] & ~nfsd_suppattrs2(cstate
->minorversion
)))
103 return nfserr_attrnotsupp
;
106 * Check FATTR4_WORD0_ACL can be supported
107 * in current environment or not.
109 if (bmval
[0] & FATTR4_WORD0_ACL
) {
110 if (!IS_POSIXACL(dentry
->d_inode
))
111 return nfserr_attrnotsupp
;
115 * According to spec, read-only attributes return ERR_INVAL.
118 if ((bmval
[0] & ~writable
[0]) || (bmval
[1] & ~writable
[1]) ||
119 (bmval
[2] & ~writable
[2]))
127 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
128 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
130 __be32 status
= nfs_ok
;
132 if (open
->op_create
== NFS4_OPEN_CREATE
) {
133 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
134 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
135 status
= check_attr_support(rqstp
, cstate
,
136 open
->op_bmval
, nfsd_attrmask
);
137 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
138 status
= check_attr_support(rqstp
, cstate
,
139 open
->op_bmval
, nfsd41_ex_attrmask
);
146 is_create_with_attrs(struct nfsd4_open
*open
)
148 return open
->op_create
== NFS4_OPEN_CREATE
149 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
150 || open
->op_createmode
== NFS4_CREATE_GUARDED
151 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
155 * if error occurs when setting the acl, just clear the acl bit
156 * in the returned attr bitmap.
159 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
160 struct nfs4_acl
*acl
, u32
*bmval
)
164 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
167 * We should probably fail the whole open at this point,
168 * but we've already created the file, so it's too late;
169 * So this seems the least of evils:
171 bmval
[0] &= ~FATTR4_WORD0_ACL
;
175 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
178 dget(src
->fh_dentry
);
180 exp_get(src
->fh_export
);
185 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
189 if (open
->op_truncate
&&
190 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
193 accmode
|= NFSD_MAY_READ_IF_EXEC
;
195 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
196 accmode
|= NFSD_MAY_READ
;
197 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
198 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
199 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
200 accmode
|= NFSD_MAY_WRITE
;
202 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
207 static __be32
nfsd_check_obj_isreg(struct svc_fh
*fh
)
209 umode_t mode
= fh
->fh_dentry
->d_inode
->i_mode
;
216 * Using err_symlink as our catch-all case may look odd; but
217 * there's no other obvious error for this case in 4.0, and we
218 * happen to know that it will cause the linux v4 client to do
219 * the right thing on attempts to open something other than a
222 return nfserr_symlink
;
225 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
*resfh
)
227 if (nfsd4_has_session(cstate
))
229 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
234 do_open_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
**resfh
)
236 struct svc_fh
*current_fh
= &cstate
->current_fh
;
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
);
285 * Note this may exit with the parent still locked.
286 * We will hold the lock until nfsd4_open's final
287 * lookup, to prevent renames or unlinks until we've had
288 * a chance to an acquire a delegation if appropriate.
290 status
= nfsd_lookup(rqstp
, current_fh
,
291 open
->op_fname
.data
, open
->op_fname
.len
, *resfh
);
294 status
= nfsd_check_obj_isreg(*resfh
);
298 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
299 do_set_nfs4_acl(rqstp
, *resfh
, open
->op_acl
, open
->op_bmval
);
301 nfsd4_set_open_owner_reply_cache(cstate
, open
, *resfh
);
302 accmode
= NFSD_MAY_NOP
;
303 if (open
->op_created
||
304 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
305 accmode
|= NFSD_MAY_OWNER_OVERRIDE
;
306 status
= do_open_permission(rqstp
, *resfh
, open
, accmode
);
307 set_change_info(&open
->op_cinfo
, current_fh
);
313 do_open_fhandle(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
315 struct svc_fh
*current_fh
= &cstate
->current_fh
;
319 /* We don't know the target directory, and therefore can not
320 * set the change info
323 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
325 nfsd4_set_open_owner_reply_cache(cstate
, open
, current_fh
);
327 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
328 (open
->op_iattr
.ia_size
== 0);
330 * In the delegation case, the client is telling us about an
331 * open that it *already* performed locally, some time ago. We
332 * should let it succeed now if possible.
334 * In the case of a CLAIM_FH open, on the other hand, the client
335 * may be counting on us to enforce permissions (the Linux 4.1
336 * client uses this for normal opens, for example).
338 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
)
339 accmode
= NFSD_MAY_OWNER_OVERRIDE
;
341 status
= do_open_permission(rqstp
, current_fh
, open
, accmode
);
347 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
349 struct nfsd4_sessionid
*sid
=
350 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
352 clid
->cl_boot
= sid
->clientid
.cl_boot
;
353 clid
->cl_id
= sid
->clientid
.cl_id
;
357 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
358 struct nfsd4_open
*open
)
361 struct svc_fh
*resfh
= NULL
;
362 struct nfsd4_compoundres
*resp
;
363 struct net
*net
= SVC_NET(rqstp
);
364 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
366 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
367 (int)open
->op_fname
.len
, open
->op_fname
.data
,
370 /* This check required by spec. */
371 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
374 open
->op_created
= 0;
377 * Before RECLAIM_COMPLETE done, server should deny new lock
379 if (nfsd4_has_session(cstate
) &&
380 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
381 &cstate
->session
->se_client
->cl_flags
) &&
382 open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
385 if (nfsd4_has_session(cstate
))
386 copy_clientid(&open
->op_clientid
, cstate
->session
);
390 /* check seqid for replay. set nfs4_owner */
391 resp
= rqstp
->rq_resp
;
392 status
= nfsd4_process_open1(&resp
->cstate
, open
, nn
);
393 if (status
== nfserr_replay_me
) {
394 struct nfs4_replay
*rp
= &open
->op_openowner
->oo_owner
.so_replay
;
395 fh_put(&cstate
->current_fh
);
396 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
398 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
400 dprintk("nfsd4_open: replay failed"
401 " restoring previous filehandle\n");
403 status
= nfserr_replay_me
;
407 if (open
->op_xdr_error
) {
408 status
= open
->op_xdr_error
;
412 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
416 /* Openowner is now set, so sequence id will get bumped. Now we need
417 * these checks before we do any creates: */
418 status
= nfserr_grace
;
419 if (locks_in_grace(net
) && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
421 status
= nfserr_no_grace
;
422 if (!locks_in_grace(net
) && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
425 switch (open
->op_claim_type
) {
426 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
427 case NFS4_OPEN_CLAIM_NULL
:
428 status
= do_open_lookup(rqstp
, cstate
, open
, &resfh
);
432 case NFS4_OPEN_CLAIM_PREVIOUS
:
433 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
437 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
438 case NFS4_OPEN_CLAIM_FH
:
439 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
440 status
= do_open_fhandle(rqstp
, cstate
, open
);
443 resfh
= &cstate
->current_fh
;
445 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
446 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
447 dprintk("NFSD: unsupported OPEN claim type %d\n",
448 open
->op_claim_type
);
449 status
= nfserr_notsupp
;
452 dprintk("NFSD: Invalid OPEN claim type %d\n",
453 open
->op_claim_type
);
454 status
= nfserr_inval
;
458 * nfsd4_process_open2() does the actual opening of the file. If
459 * successful, it (1) truncates the file if open->op_truncate was
460 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
462 status
= nfsd4_process_open2(rqstp
, resfh
, open
);
463 WARN(status
&& open
->op_created
,
464 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
465 be32_to_cpu(status
));
467 if (resfh
&& resfh
!= &cstate
->current_fh
) {
468 fh_dup2(&cstate
->current_fh
, resfh
);
472 nfsd4_cleanup_open_state(open
, status
);
473 if (open
->op_openowner
&& !nfsd4_has_session(cstate
))
474 cstate
->replay_owner
= &open
->op_openowner
->oo_owner
;
475 nfsd4_bump_seqid(cstate
, status
);
476 if (!cstate
->replay_owner
)
482 * OPEN is the only seqid-mutating operation whose decoding can fail
483 * with a seqid-mutating error (specifically, decoding of user names in
484 * the attributes). Therefore we have to do some processing to look up
485 * the stateowner so that we can bump the seqid.
487 static __be32
nfsd4_open_omfg(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_op
*op
)
489 struct nfsd4_open
*open
= (struct nfsd4_open
*)&op
->u
;
491 if (!seqid_mutating_err(ntohl(op
->status
)))
493 if (nfsd4_has_session(cstate
))
495 open
->op_xdr_error
= op
->status
;
496 return nfsd4_open(rqstp
, cstate
, open
);
500 * filehandle-manipulating ops.
503 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
504 struct svc_fh
**getfh
)
506 if (!cstate
->current_fh
.fh_dentry
)
507 return nfserr_nofilehandle
;
509 *getfh
= &cstate
->current_fh
;
514 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
515 struct nfsd4_putfh
*putfh
)
517 fh_put(&cstate
->current_fh
);
518 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
519 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
521 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
525 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
530 fh_put(&cstate
->current_fh
);
531 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
536 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
539 if (!cstate
->save_fh
.fh_dentry
)
540 return nfserr_restorefh
;
542 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
543 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
544 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
545 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
551 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
554 if (!cstate
->current_fh
.fh_dentry
)
555 return nfserr_nofilehandle
;
557 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
558 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
559 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
560 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
569 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
570 struct nfsd4_access
*access
)
572 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
575 access
->ac_resp_access
= access
->ac_req_access
;
576 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
577 &access
->ac_supported
);
580 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
583 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
586 * This is opaque to client, so no need to byte-swap. Use
587 * __force to keep sparse happy
589 verf
[0] = (__force __be32
)nn
->nfssvc_boot
.tv_sec
;
590 verf
[1] = (__force __be32
)nn
->nfssvc_boot
.tv_usec
;
591 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
595 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
596 struct nfsd4_commit
*commit
)
598 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
599 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
604 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
605 struct nfsd4_create
*create
)
611 fh_init(&resfh
, NFS4_FHSIZE
);
613 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
618 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
623 switch (create
->cr_type
) {
625 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
626 create
->cr_name
, create
->cr_namelen
,
627 create
->cr_data
, &resfh
);
631 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
632 if (MAJOR(rdev
) != create
->cr_specdata1
||
633 MINOR(rdev
) != create
->cr_specdata2
)
635 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
636 create
->cr_name
, create
->cr_namelen
,
637 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
641 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
642 if (MAJOR(rdev
) != create
->cr_specdata1
||
643 MINOR(rdev
) != create
->cr_specdata2
)
645 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
646 create
->cr_name
, create
->cr_namelen
,
647 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
651 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
652 create
->cr_name
, create
->cr_namelen
,
653 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
657 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
658 create
->cr_name
, create
->cr_namelen
,
659 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
663 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
664 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
665 create
->cr_name
, create
->cr_namelen
,
666 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
670 status
= nfserr_badtype
;
676 if (create
->cr_label
.len
)
677 nfsd4_security_inode_setsecctx(&resfh
, &create
->cr_label
, create
->cr_bmval
);
679 if (create
->cr_acl
!= NULL
)
680 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
683 fh_unlock(&cstate
->current_fh
);
684 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
685 fh_dup2(&cstate
->current_fh
, &resfh
);
692 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
693 struct nfsd4_getattr
*getattr
)
697 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
701 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
704 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
705 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
706 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
708 getattr
->ga_fhp
= &cstate
->current_fh
;
713 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
714 struct nfsd4_link
*link
)
716 __be32 status
= nfserr_nofilehandle
;
718 if (!cstate
->save_fh
.fh_dentry
)
720 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
721 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
723 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
727 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
729 struct svc_fh tmp_fh
;
732 fh_init(&tmp_fh
, NFS4_FHSIZE
);
733 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
736 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
741 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
745 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
748 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
752 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
753 struct nfsd4_lookup
*lookup
)
755 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
756 lookup
->lo_name
, lookup
->lo_len
,
757 &cstate
->current_fh
);
761 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
762 struct nfsd4_read
*read
)
766 /* no need to check permission - this will be done in nfsd_read() */
768 read
->rd_filp
= NULL
;
769 if (read
->rd_offset
>= OFFSET_MAX
)
773 * If we do a zero copy read, then a client will see read data
774 * that reflects the state of the file *after* performing the
775 * following compound.
777 * To ensure proper ordering, we therefore turn off zero copy if
778 * the client wants us to do more in this compound:
780 if (!nfsd4_last_compound_op(rqstp
))
781 rqstp
->rq_splice_ok
= false;
784 if ((status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
785 cstate
, &read
->rd_stateid
,
786 RD_STATE
, &read
->rd_filp
))) {
787 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
792 read
->rd_rqstp
= rqstp
;
793 read
->rd_fhp
= &cstate
->current_fh
;
798 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
799 struct nfsd4_readdir
*readdir
)
801 u64 cookie
= readdir
->rd_cookie
;
802 static const nfs4_verifier zeroverf
;
804 /* no need to check permission - this will be done in nfsd_readdir() */
806 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
809 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
810 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
811 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
813 if ((cookie
== 1) || (cookie
== 2) ||
814 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
815 return nfserr_bad_cookie
;
817 readdir
->rd_rqstp
= rqstp
;
818 readdir
->rd_fhp
= &cstate
->current_fh
;
823 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
824 struct nfsd4_readlink
*readlink
)
826 readlink
->rl_rqstp
= rqstp
;
827 readlink
->rl_fhp
= &cstate
->current_fh
;
832 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
833 struct nfsd4_remove
*remove
)
837 if (locks_in_grace(SVC_NET(rqstp
)))
839 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
840 remove
->rm_name
, remove
->rm_namelen
);
842 fh_unlock(&cstate
->current_fh
);
843 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
849 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
850 struct nfsd4_rename
*rename
)
852 __be32 status
= nfserr_nofilehandle
;
854 if (!cstate
->save_fh
.fh_dentry
)
856 if (locks_in_grace(SVC_NET(rqstp
)) &&
857 !(cstate
->save_fh
.fh_export
->ex_flags
& NFSEXP_NOSUBTREECHECK
))
859 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
860 rename
->rn_snamelen
, &cstate
->current_fh
,
861 rename
->rn_tname
, rename
->rn_tnamelen
);
864 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
865 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
870 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
871 struct nfsd4_secinfo
*secinfo
)
874 struct svc_export
*exp
;
875 struct dentry
*dentry
;
878 fh_init(&resfh
, NFS4_FHSIZE
);
879 err
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_EXEC
);
882 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
883 secinfo
->si_name
, secinfo
->si_namelen
,
887 if (dentry
->d_inode
== NULL
) {
891 secinfo
->si_exp
= exp
;
893 if (cstate
->minorversion
)
894 /* See rfc 5661 section 2.6.3.1.1.8 */
895 fh_put(&cstate
->current_fh
);
900 nfsd4_secinfo_no_name(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
901 struct nfsd4_secinfo_no_name
*sin
)
905 switch (sin
->sin_style
) {
906 case NFS4_SECINFO_STYLE4_CURRENT_FH
:
908 case NFS4_SECINFO_STYLE4_PARENT
:
909 err
= nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
917 sin
->sin_exp
= exp_get(cstate
->current_fh
.fh_export
);
918 fh_put(&cstate
->current_fh
);
923 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
924 struct nfsd4_setattr
*setattr
)
926 __be32 status
= nfs_ok
;
929 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
930 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
931 &setattr
->sa_stateid
, WR_STATE
, NULL
);
933 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
937 err
= fh_want_write(&cstate
->current_fh
);
939 return nfserrno(err
);
942 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
947 if (setattr
->sa_acl
!= NULL
)
948 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
952 if (setattr
->sa_label
.len
)
953 status
= nfsd4_set_nfs4_label(rqstp
, &cstate
->current_fh
,
957 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
960 fh_drop_write(&cstate
->current_fh
);
964 static int fill_in_write_vector(struct kvec
*vec
, struct nfsd4_write
*write
)
967 int buflen
= write
->wr_buflen
;
969 vec
[0].iov_base
= write
->wr_head
.iov_base
;
970 vec
[0].iov_len
= min_t(int, buflen
, write
->wr_head
.iov_len
);
971 buflen
-= vec
[0].iov_len
;
974 vec
[i
].iov_base
= page_address(write
->wr_pagelist
[i
- 1]);
975 vec
[i
].iov_len
= min_t(int, PAGE_SIZE
, buflen
);
976 buflen
-= vec
[i
].iov_len
;
983 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
984 struct nfsd4_write
*write
)
986 stateid_t
*stateid
= &write
->wr_stateid
;
987 struct file
*filp
= NULL
;
988 __be32 status
= nfs_ok
;
992 /* no need to check permission - this will be done in nfsd_write() */
994 if (write
->wr_offset
>= OFFSET_MAX
)
997 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
998 cstate
, stateid
, WR_STATE
, &filp
);
1000 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1004 cnt
= write
->wr_buflen
;
1005 write
->wr_how_written
= write
->wr_stable_how
;
1006 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
1008 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
1009 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
1011 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
1012 write
->wr_offset
, rqstp
->rq_vec
, nvecs
,
1013 &cnt
, &write
->wr_how_written
);
1017 write
->wr_bytes_written
= cnt
;
1022 /* This routine never returns NFS_OK! If there are no other errors, it
1023 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1024 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1025 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1028 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1029 struct nfsd4_verify
*verify
)
1035 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
1039 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
1043 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
1044 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
1045 return nfserr_inval
;
1046 if (verify
->ve_attrlen
& 3)
1047 return nfserr_inval
;
1050 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1052 count
= 4 + (verify
->ve_attrlen
>> 2);
1053 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
1055 return nfserr_jukebox
;
1058 status
= nfsd4_encode_fattr_to_buf(&p
, count
, &cstate
->current_fh
,
1059 cstate
->current_fh
.fh_export
,
1060 cstate
->current_fh
.fh_dentry
,
1064 * If nfsd4_encode_fattr() ran out of space, assume that's because
1065 * the attributes are longer (hence different) than those given:
1067 if (status
== nfserr_resource
)
1068 status
= nfserr_not_same
;
1073 p
= buf
+ 1 + ntohl(buf
[0]);
1074 status
= nfserr_not_same
;
1075 if (ntohl(*p
++) != verify
->ve_attrlen
)
1077 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1078 status
= nfserr_same
;
1086 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1087 struct nfsd4_verify
*verify
)
1091 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1092 return status
== nfserr_not_same
? nfs_ok
: status
;
1096 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1097 struct nfsd4_verify
*verify
)
1101 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1102 return status
== nfserr_same
? nfs_ok
: status
;
1109 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
1114 static inline void nfsd4_increment_op_stats(u32 opnum
)
1116 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1117 nfsdstats
.nfs4_opcount
[opnum
]++;
1120 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
1122 typedef u32(*nfsd4op_rsize
)(struct svc_rqst
*, struct nfsd4_op
*op
);
1123 typedef void(*stateid_setter
)(struct nfsd4_compound_state
*, void *);
1124 typedef void(*stateid_getter
)(struct nfsd4_compound_state
*, void *);
1126 enum nfsd4_op_flags
{
1127 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
1128 ALLOWED_ON_ABSENT_FS
= 1 << 1, /* ops processed on absent fs */
1129 ALLOWED_AS_FIRST_OP
= 1 << 2, /* ops reqired first in compound */
1130 /* For rfc 5661 section 2.6.3.1.1: */
1131 OP_HANDLES_WRONGSEC
= 1 << 3,
1132 OP_IS_PUTFH_LIKE
= 1 << 4,
1134 * These are the ops whose result size we estimate before
1135 * encoding, to avoid performing an op then not being able to
1136 * respond or cache a response. This includes writes and setattrs
1137 * as well as the operations usually called "nonidempotent":
1139 OP_MODIFIES_SOMETHING
= 1 << 5,
1141 * Cache compounds containing these ops in the xid-based drc:
1142 * We use the DRC for compounds containing non-idempotent
1143 * operations, *except* those that are 4.1-specific (since
1144 * sessions provide their own EOS), and except for stateful
1145 * operations other than setclientid and setclientid_confirm
1146 * (since sequence numbers provide EOS for open, lock, etc in
1149 OP_CACHEME
= 1 << 6,
1151 * These are ops which clear current state id.
1153 OP_CLEAR_STATEID
= 1 << 7,
1156 struct nfsd4_operation
{
1157 nfsd4op_func op_func
;
1160 /* Try to get response size before operation */
1161 nfsd4op_rsize op_rsize_bop
;
1162 stateid_getter op_get_currentstateid
;
1163 stateid_setter op_set_currentstateid
;
1166 static struct nfsd4_operation nfsd4_ops
[];
1168 static const char *nfsd4_op_name(unsigned opnum
);
1171 * Enforce NFSv4.1 COMPOUND ordering rules:
1173 * Also note, enforced elsewhere:
1174 * - SEQUENCE other than as first op results in
1175 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1176 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1177 * (Enforced in nfsd4_bind_conn_to_session().)
1178 * - DESTROY_SESSION must be the final operation in a compound, if
1179 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1180 * (Enforced in nfsd4_destroy_session().)
1182 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1184 struct nfsd4_op
*op
= &args
->ops
[0];
1186 /* These ordering requirements don't apply to NFSv4.0: */
1187 if (args
->minorversion
== 0)
1189 /* This is weird, but OK, not our problem: */
1190 if (args
->opcnt
== 0)
1192 if (op
->status
== nfserr_op_illegal
)
1194 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1195 return nfserr_op_not_in_session
;
1196 if (op
->opnum
== OP_SEQUENCE
)
1198 if (args
->opcnt
!= 1)
1199 return nfserr_not_only_op
;
1203 static inline struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1205 return &nfsd4_ops
[op
->opnum
];
1208 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1210 if (op
->opnum
== OP_ILLEGAL
)
1212 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1215 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1217 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1218 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1219 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1220 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1221 struct nfsd4_operation
*thisd
;
1222 struct nfsd4_operation
*nextd
;
1224 thisd
= OPDESC(this);
1226 * Most ops check wronsec on our own; only the putfh-like ops
1227 * have special rules.
1229 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1232 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1233 * put-filehandle operation if we're not going to use the
1236 if (argp
->opcnt
== resp
->opcnt
)
1239 nextd
= OPDESC(next
);
1241 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1242 * errors themselves as necessary; others should check for them
1245 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1248 static void svcxdr_init_encode(struct svc_rqst
*rqstp
,
1249 struct nfsd4_compoundres
*resp
)
1251 struct xdr_stream
*xdr
= &resp
->xdr
;
1252 struct xdr_buf
*buf
= &rqstp
->rq_res
;
1253 struct kvec
*head
= buf
->head
;
1257 xdr
->p
= head
->iov_base
+ head
->iov_len
;
1258 xdr
->end
= head
->iov_base
+ PAGE_SIZE
- rqstp
->rq_auth_slack
;
1259 /* Tail and page_len should be zero at this point: */
1260 buf
->len
= buf
->head
[0].iov_len
;
1261 xdr
->scratch
.iov_len
= 0;
1262 xdr
->page_ptr
= buf
->pages
- 1;
1263 buf
->buflen
= PAGE_SIZE
* (1 + rqstp
->rq_page_end
- buf
->pages
)
1264 - rqstp
->rq_auth_slack
;
1271 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1272 struct nfsd4_compoundargs
*args
,
1273 struct nfsd4_compoundres
*resp
)
1275 struct nfsd4_op
*op
;
1276 struct nfsd4_operation
*opdesc
;
1277 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1278 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1279 struct svc_fh
*save_fh
= &cstate
->save_fh
;
1282 svcxdr_init_encode(rqstp
, resp
);
1283 resp
->tagp
= resp
->xdr
.p
;
1284 /* reserve space for: taglen, tag, and opcnt */
1285 xdr_reserve_space(&resp
->xdr
, 8 + args
->taglen
);
1286 resp
->taglen
= args
->taglen
;
1287 resp
->tag
= args
->tag
;
1288 resp
->rqstp
= rqstp
;
1289 cstate
->minorversion
= args
->minorversion
;
1290 fh_init(current_fh
, NFS4_FHSIZE
);
1291 fh_init(save_fh
, NFS4_FHSIZE
);
1293 * Don't use the deferral mechanism for NFSv4; compounds make it
1294 * too hard to avoid non-idempotency problems.
1296 rqstp
->rq_usedeferral
= false;
1299 * According to RFC3010, this takes precedence over all other errors.
1301 status
= nfserr_minor_vers_mismatch
;
1302 if (nfsd_minorversion(args
->minorversion
, NFSD_TEST
) <= 0)
1305 status
= nfs41_check_op_ordering(args
);
1308 op
->status
= status
;
1312 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1313 op
= &args
->ops
[resp
->opcnt
++];
1315 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1316 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1317 nfsd4_op_name(op
->opnum
));
1319 * The XDR decode routines may have pre-set op->status;
1320 * for example, if there is a miscellaneous XDR error
1321 * it will be set to nfserr_bad_xdr.
1324 if (op
->opnum
== OP_OPEN
)
1325 op
->status
= nfsd4_open_omfg(rqstp
, cstate
, op
);
1329 opdesc
= OPDESC(op
);
1331 if (!current_fh
->fh_dentry
) {
1332 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1333 op
->status
= nfserr_nofilehandle
;
1336 } else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
1337 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1338 op
->status
= nfserr_moved
;
1342 fh_clear_wcc(current_fh
);
1344 /* If op is non-idempotent */
1345 if (opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1347 * Don't execute this op if we couldn't encode a
1350 u32 plen
= opdesc
->op_rsize_bop(rqstp
, op
);
1352 * Plus if there's another operation, make sure
1353 * we'll have space to at least encode an error:
1355 if (resp
->opcnt
< args
->opcnt
)
1356 plen
+= COMPOUND_ERR_SLACK_SPACE
;
1357 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1363 if (opdesc
->op_get_currentstateid
)
1364 opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1365 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1368 if (opdesc
->op_set_currentstateid
)
1369 opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1371 if (opdesc
->op_flags
& OP_CLEAR_STATEID
)
1372 clear_current_stateid(cstate
);
1374 if (need_wrongsec_check(rqstp
))
1375 op
->status
= check_nfsd_access(current_fh
->fh_export
, rqstp
);
1379 /* Only from SEQUENCE */
1380 if (cstate
->status
== nfserr_replay_cache
) {
1381 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1382 status
= op
->status
;
1385 if (op
->status
== nfserr_replay_me
) {
1386 op
->replay
= &cstate
->replay_owner
->so_replay
;
1387 nfsd4_encode_replay(&resp
->xdr
, op
);
1388 status
= op
->status
= op
->replay
->rp_status
;
1390 nfsd4_encode_operation(resp
, op
);
1391 status
= op
->status
;
1394 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1395 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1396 be32_to_cpu(status
));
1398 if (cstate
->replay_owner
) {
1399 nfs4_unlock_state();
1400 cstate
->replay_owner
= NULL
;
1402 /* XXX Ugh, we need to get rid of this kind of special case: */
1403 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1404 fput(op
->u
.read
.rd_filp
);
1406 nfsd4_increment_op_stats(op
->opnum
);
1409 cstate
->status
= status
;
1412 BUG_ON(cstate
->replay_owner
);
1414 /* Reset deferral mechanism for RPC deferrals */
1415 rqstp
->rq_usedeferral
= true;
1416 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1420 #define op_encode_hdr_size (2)
1421 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1422 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1423 #define op_encode_change_info_maxsz (5)
1424 #define nfs4_fattr_bitmap_maxsz (4)
1426 /* We'll fall back on returning no lockowner if run out of space: */
1427 #define op_encode_lockowner_maxsz (0)
1428 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1430 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1432 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1433 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1434 op_encode_ace_maxsz)
1436 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1438 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1440 return (op_encode_hdr_size
) * sizeof(__be32
);
1443 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1445 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1448 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1450 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1453 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1455 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1456 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1460 * Note since this is an idempotent operation we won't insist on failing
1461 * the op prematurely if the estimate is too large. We may turn off splice
1462 * reads unnecessarily.
1464 static inline u32
nfsd4_getattr_rsize(struct svc_rqst
*rqstp
,
1465 struct nfsd4_op
*op
)
1467 u32
*bmap
= op
->u
.getattr
.ga_bmval
;
1468 u32 bmap0
= bmap
[0], bmap1
= bmap
[1], bmap2
= bmap
[2];
1471 if (bmap0
& FATTR4_WORD0_ACL
)
1472 return svc_max_payload(rqstp
);
1473 if (bmap0
& FATTR4_WORD0_FS_LOCATIONS
)
1474 return svc_max_payload(rqstp
);
1476 if (bmap1
& FATTR4_WORD1_OWNER
) {
1477 ret
+= IDMAP_NAMESZ
+ 4;
1478 bmap1
&= ~FATTR4_WORD1_OWNER
;
1480 if (bmap1
& FATTR4_WORD1_OWNER_GROUP
) {
1481 ret
+= IDMAP_NAMESZ
+ 4;
1482 bmap1
&= ~FATTR4_WORD1_OWNER_GROUP
;
1484 if (bmap0
& FATTR4_WORD0_FILEHANDLE
) {
1485 ret
+= NFS4_FHSIZE
+ 4;
1486 bmap0
&= ~FATTR4_WORD0_FILEHANDLE
;
1488 if (bmap2
& FATTR4_WORD2_SECURITY_LABEL
) {
1489 ret
+= NFSD4_MAX_SEC_LABEL_LEN
+ 12;
1490 bmap2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
1493 * Largest of remaining attributes are 16 bytes (e.g.,
1494 * supported_attributes)
1496 ret
+= 16 * (hweight32(bmap0
) + hweight32(bmap1
) + hweight32(bmap2
));
1497 /* bitmask, length */
1502 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1504 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1508 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1510 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1514 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1516 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1517 + op_encode_change_info_maxsz
+ 1
1518 + nfs4_fattr_bitmap_maxsz
1519 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1522 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1524 u32 maxcount
= 0, rlen
= 0;
1526 maxcount
= svc_max_payload(rqstp
);
1527 rlen
= min(op
->u
.read
.rd_length
, maxcount
);
1529 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1532 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1534 u32 maxcount
= 0, rlen
= 0;
1536 maxcount
= svc_max_payload(rqstp
);
1537 rlen
= min(op
->u
.readdir
.rd_maxcount
, maxcount
);
1539 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
+
1540 XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1543 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1545 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1549 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1551 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1552 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1555 static inline u32
nfsd4_sequence_rsize(struct svc_rqst
*rqstp
,
1556 struct nfsd4_op
*op
)
1558 return NFS4_MAX_SESSIONID_LEN
+ 20;
1561 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1563 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1566 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1568 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE
)) *
1572 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1574 return (op_encode_hdr_size
+ 2 + op_encode_verifier_maxsz
) * sizeof(__be32
);
1577 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1579 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
1580 1 + 1 + /* eir_flags, spr_how */\
1581 4 + /* spo_must_enforce & _allow with bitmap */\
1582 2 + /*eir_server_owner.so_minor_id */\
1583 /* eir_server_owner.so_major_id<> */\
1584 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1585 /* eir_server_scope<> */\
1586 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1587 1 + /* eir_server_impl_id array length */\
1588 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
1591 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1593 return (op_encode_hdr_size
+ \
1594 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
1595 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
1598 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1600 return (op_encode_hdr_size
+ \
1601 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
1602 2 + /* csr_sequence, csr_flags */\
1603 op_encode_channel_attrs_maxsz
+ \
1604 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
1607 static struct nfsd4_operation nfsd4_ops
[] = {
1609 .op_func
= (nfsd4op_func
)nfsd4_access
,
1610 .op_name
= "OP_ACCESS",
1613 .op_func
= (nfsd4op_func
)nfsd4_close
,
1614 .op_flags
= OP_MODIFIES_SOMETHING
,
1615 .op_name
= "OP_CLOSE",
1616 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1617 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_closestateid
,
1618 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_closestateid
,
1621 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1622 .op_flags
= OP_MODIFIES_SOMETHING
,
1623 .op_name
= "OP_COMMIT",
1624 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_commit_rsize
,
1627 .op_func
= (nfsd4op_func
)nfsd4_create
,
1628 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
1629 .op_name
= "OP_CREATE",
1630 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_rsize
,
1632 [OP_DELEGRETURN
] = {
1633 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1634 .op_flags
= OP_MODIFIES_SOMETHING
,
1635 .op_name
= "OP_DELEGRETURN",
1636 .op_rsize_bop
= nfsd4_only_status_rsize
,
1637 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_delegreturnstateid
,
1640 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1641 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1642 .op_rsize_bop
= nfsd4_getattr_rsize
,
1643 .op_name
= "OP_GETATTR",
1646 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1647 .op_name
= "OP_GETFH",
1650 .op_func
= (nfsd4op_func
)nfsd4_link
,
1651 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
1653 .op_name
= "OP_LINK",
1654 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_link_rsize
,
1657 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1658 .op_flags
= OP_MODIFIES_SOMETHING
,
1659 .op_name
= "OP_LOCK",
1660 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_lock_rsize
,
1661 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_lockstateid
,
1664 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1665 .op_name
= "OP_LOCKT",
1668 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1669 .op_flags
= OP_MODIFIES_SOMETHING
,
1670 .op_name
= "OP_LOCKU",
1671 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1672 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_lockustateid
,
1675 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1676 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1677 .op_name
= "OP_LOOKUP",
1680 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1681 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1682 .op_name
= "OP_LOOKUPP",
1685 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1686 .op_name
= "OP_NVERIFY",
1689 .op_func
= (nfsd4op_func
)nfsd4_open
,
1690 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1691 .op_name
= "OP_OPEN",
1692 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_open_rsize
,
1693 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_openstateid
,
1695 [OP_OPEN_CONFIRM
] = {
1696 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1697 .op_flags
= OP_MODIFIES_SOMETHING
,
1698 .op_name
= "OP_OPEN_CONFIRM",
1699 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1701 [OP_OPEN_DOWNGRADE
] = {
1702 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1703 .op_flags
= OP_MODIFIES_SOMETHING
,
1704 .op_name
= "OP_OPEN_DOWNGRADE",
1705 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1706 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_opendowngradestateid
,
1707 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_opendowngradestateid
,
1710 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1711 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1712 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1713 .op_name
= "OP_PUTFH",
1714 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1717 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1718 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1719 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1720 .op_name
= "OP_PUTPUBFH",
1721 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1724 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1725 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1726 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1727 .op_name
= "OP_PUTROOTFH",
1728 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1731 .op_func
= (nfsd4op_func
)nfsd4_read
,
1732 .op_name
= "OP_READ",
1733 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_read_rsize
,
1734 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_readstateid
,
1737 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1738 .op_name
= "OP_READDIR",
1739 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_readdir_rsize
,
1742 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1743 .op_name
= "OP_READLINK",
1746 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1747 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1748 .op_name
= "OP_REMOVE",
1749 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_remove_rsize
,
1752 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1753 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1754 .op_name
= "OP_RENAME",
1755 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_rename_rsize
,
1758 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1759 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1760 | OP_MODIFIES_SOMETHING
,
1761 .op_name
= "OP_RENEW",
1762 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1766 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1767 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1768 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
1769 .op_name
= "OP_RESTOREFH",
1770 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1773 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1774 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1775 .op_name
= "OP_SAVEFH",
1776 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1779 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1780 .op_flags
= OP_HANDLES_WRONGSEC
,
1781 .op_name
= "OP_SECINFO",
1784 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1785 .op_name
= "OP_SETATTR",
1786 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1787 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setattr_rsize
,
1788 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_setattrstateid
,
1790 [OP_SETCLIENTID
] = {
1791 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1792 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1793 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1794 .op_name
= "OP_SETCLIENTID",
1795 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setclientid_rsize
,
1797 [OP_SETCLIENTID_CONFIRM
] = {
1798 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1799 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1800 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1801 .op_name
= "OP_SETCLIENTID_CONFIRM",
1802 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1805 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1806 .op_name
= "OP_VERIFY",
1809 .op_func
= (nfsd4op_func
)nfsd4_write
,
1810 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1811 .op_name
= "OP_WRITE",
1812 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1813 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_writestateid
,
1815 [OP_RELEASE_LOCKOWNER
] = {
1816 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1817 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1818 | OP_MODIFIES_SOMETHING
,
1819 .op_name
= "OP_RELEASE_LOCKOWNER",
1820 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1823 /* NFSv4.1 operations */
1824 [OP_EXCHANGE_ID
] = {
1825 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1826 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1827 | OP_MODIFIES_SOMETHING
,
1828 .op_name
= "OP_EXCHANGE_ID",
1829 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_exchange_id_rsize
,
1831 [OP_BACKCHANNEL_CTL
] = {
1832 .op_func
= (nfsd4op_func
)nfsd4_backchannel_ctl
,
1833 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1834 .op_name
= "OP_BACKCHANNEL_CTL",
1835 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1837 [OP_BIND_CONN_TO_SESSION
] = {
1838 .op_func
= (nfsd4op_func
)nfsd4_bind_conn_to_session
,
1839 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1840 | OP_MODIFIES_SOMETHING
,
1841 .op_name
= "OP_BIND_CONN_TO_SESSION",
1842 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_bind_conn_to_session_rsize
,
1844 [OP_CREATE_SESSION
] = {
1845 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1846 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1847 | OP_MODIFIES_SOMETHING
,
1848 .op_name
= "OP_CREATE_SESSION",
1849 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_session_rsize
,
1851 [OP_DESTROY_SESSION
] = {
1852 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1853 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1854 | OP_MODIFIES_SOMETHING
,
1855 .op_name
= "OP_DESTROY_SESSION",
1856 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1859 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1860 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1861 .op_name
= "OP_SEQUENCE",
1863 [OP_DESTROY_CLIENTID
] = {
1864 .op_func
= (nfsd4op_func
)nfsd4_destroy_clientid
,
1865 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1866 | OP_MODIFIES_SOMETHING
,
1867 .op_name
= "OP_DESTROY_CLIENTID",
1868 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1870 [OP_RECLAIM_COMPLETE
] = {
1871 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1872 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1873 .op_name
= "OP_RECLAIM_COMPLETE",
1874 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1876 [OP_SECINFO_NO_NAME
] = {
1877 .op_func
= (nfsd4op_func
)nfsd4_secinfo_no_name
,
1878 .op_flags
= OP_HANDLES_WRONGSEC
,
1879 .op_name
= "OP_SECINFO_NO_NAME",
1881 [OP_TEST_STATEID
] = {
1882 .op_func
= (nfsd4op_func
)nfsd4_test_stateid
,
1883 .op_flags
= ALLOWED_WITHOUT_FH
,
1884 .op_name
= "OP_TEST_STATEID",
1886 [OP_FREE_STATEID
] = {
1887 .op_func
= (nfsd4op_func
)nfsd4_free_stateid
,
1888 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1889 .op_name
= "OP_FREE_STATEID",
1890 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_freestateid
,
1891 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1895 int nfsd4_max_reply(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1897 struct nfsd4_operation
*opdesc
;
1898 nfsd4op_rsize estimator
;
1900 if (op
->opnum
== OP_ILLEGAL
)
1901 return op_encode_hdr_size
* sizeof(__be32
);
1902 opdesc
= OPDESC(op
);
1903 estimator
= opdesc
->op_rsize_bop
;
1904 return estimator
? estimator(rqstp
, op
) : PAGE_SIZE
;
1907 void warn_on_nonidempotent_op(struct nfsd4_op
*op
)
1909 if (OPDESC(op
)->op_flags
& OP_MODIFIES_SOMETHING
) {
1910 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
1911 op
->opnum
, nfsd4_op_name(op
->opnum
));
1916 static const char *nfsd4_op_name(unsigned opnum
)
1918 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1919 return nfsd4_ops
[opnum
].op_name
;
1920 return "unknown_operation";
1923 #define nfsd4_voidres nfsd4_voidargs
1924 struct nfsd4_voidargs
{ int dummy
; };
1926 static struct svc_procedure nfsd_procedures4
[2] = {
1928 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
1929 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
1930 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
1931 .pc_ressize
= sizeof(struct nfsd4_voidres
),
1932 .pc_cachetype
= RC_NOCACHE
,
1935 [NFSPROC4_COMPOUND
] = {
1936 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
1937 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
1938 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
1939 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
1940 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
1941 .pc_release
= nfsd4_release_compoundargs
,
1942 .pc_cachetype
= RC_NOCACHE
,
1943 .pc_xdrressize
= NFSD_BUFSIZE
/4,
1947 struct svc_version nfsd_version4
= {
1950 .vs_proc
= nfsd_procedures4
,
1951 .vs_dispatch
= nfsd_dispatch
,
1952 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,