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
);
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
, &resfh
);
430 case NFS4_OPEN_CLAIM_PREVIOUS
:
431 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
435 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
436 case NFS4_OPEN_CLAIM_FH
:
437 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
438 status
= do_open_fhandle(rqstp
, cstate
, open
);
441 resfh
= &cstate
->current_fh
;
443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
444 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
445 dprintk("NFSD: unsupported OPEN claim type %d\n",
446 open
->op_claim_type
);
447 status
= nfserr_notsupp
;
450 dprintk("NFSD: Invalid OPEN claim type %d\n",
451 open
->op_claim_type
);
452 status
= nfserr_inval
;
456 * nfsd4_process_open2() does the actual opening of the file. If
457 * successful, it (1) truncates the file if open->op_truncate was
458 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
460 status
= nfsd4_process_open2(rqstp
, resfh
, open
);
461 WARN(status
&& open
->op_created
,
462 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
463 be32_to_cpu(status
));
465 if (resfh
&& resfh
!= &cstate
->current_fh
) {
466 fh_dup2(&cstate
->current_fh
, resfh
);
470 nfsd4_cleanup_open_state(cstate
, open
, status
);
471 nfsd4_bump_seqid(cstate
, status
);
476 * OPEN is the only seqid-mutating operation whose decoding can fail
477 * with a seqid-mutating error (specifically, decoding of user names in
478 * the attributes). Therefore we have to do some processing to look up
479 * the stateowner so that we can bump the seqid.
481 static __be32
nfsd4_open_omfg(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_op
*op
)
483 struct nfsd4_open
*open
= (struct nfsd4_open
*)&op
->u
;
485 if (!seqid_mutating_err(ntohl(op
->status
)))
487 if (nfsd4_has_session(cstate
))
489 open
->op_xdr_error
= op
->status
;
490 return nfsd4_open(rqstp
, cstate
, open
);
494 * filehandle-manipulating ops.
497 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
498 struct svc_fh
**getfh
)
500 if (!cstate
->current_fh
.fh_dentry
)
501 return nfserr_nofilehandle
;
503 *getfh
= &cstate
->current_fh
;
508 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
509 struct nfsd4_putfh
*putfh
)
511 fh_put(&cstate
->current_fh
);
512 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
513 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
515 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
519 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
524 fh_put(&cstate
->current_fh
);
525 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
530 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
533 if (!cstate
->save_fh
.fh_dentry
)
534 return nfserr_restorefh
;
536 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
537 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
538 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
539 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
545 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
548 if (!cstate
->current_fh
.fh_dentry
)
549 return nfserr_nofilehandle
;
551 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
552 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
553 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
554 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
563 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
564 struct nfsd4_access
*access
)
566 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
569 access
->ac_resp_access
= access
->ac_req_access
;
570 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
571 &access
->ac_supported
);
574 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
577 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
580 * This is opaque to client, so no need to byte-swap. Use
581 * __force to keep sparse happy
583 verf
[0] = (__force __be32
)nn
->nfssvc_boot
.tv_sec
;
584 verf
[1] = (__force __be32
)nn
->nfssvc_boot
.tv_usec
;
585 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
589 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
590 struct nfsd4_commit
*commit
)
592 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
593 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
598 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
599 struct nfsd4_create
*create
)
605 fh_init(&resfh
, NFS4_FHSIZE
);
607 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
612 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
617 switch (create
->cr_type
) {
619 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
620 create
->cr_name
, create
->cr_namelen
,
621 create
->cr_data
, &resfh
);
625 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
626 if (MAJOR(rdev
) != create
->cr_specdata1
||
627 MINOR(rdev
) != create
->cr_specdata2
)
629 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
630 create
->cr_name
, create
->cr_namelen
,
631 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
635 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
636 if (MAJOR(rdev
) != create
->cr_specdata1
||
637 MINOR(rdev
) != create
->cr_specdata2
)
639 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
640 create
->cr_name
, create
->cr_namelen
,
641 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
645 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
646 create
->cr_name
, create
->cr_namelen
,
647 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
651 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
652 create
->cr_name
, create
->cr_namelen
,
653 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
657 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
658 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
659 create
->cr_name
, create
->cr_namelen
,
660 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
664 status
= nfserr_badtype
;
670 if (create
->cr_label
.len
)
671 nfsd4_security_inode_setsecctx(&resfh
, &create
->cr_label
, create
->cr_bmval
);
673 if (create
->cr_acl
!= NULL
)
674 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
677 fh_unlock(&cstate
->current_fh
);
678 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
679 fh_dup2(&cstate
->current_fh
, &resfh
);
686 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
687 struct nfsd4_getattr
*getattr
)
691 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
695 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
698 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
699 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
700 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
702 getattr
->ga_fhp
= &cstate
->current_fh
;
707 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
708 struct nfsd4_link
*link
)
710 __be32 status
= nfserr_nofilehandle
;
712 if (!cstate
->save_fh
.fh_dentry
)
714 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
715 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
717 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
721 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
723 struct svc_fh tmp_fh
;
726 fh_init(&tmp_fh
, NFS4_FHSIZE
);
727 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
730 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
735 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
739 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
742 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
746 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
747 struct nfsd4_lookup
*lookup
)
749 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
750 lookup
->lo_name
, lookup
->lo_len
,
751 &cstate
->current_fh
);
755 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
756 struct nfsd4_read
*read
)
760 /* no need to check permission - this will be done in nfsd_read() */
762 read
->rd_filp
= NULL
;
763 if (read
->rd_offset
>= OFFSET_MAX
)
767 * If we do a zero copy read, then a client will see read data
768 * that reflects the state of the file *after* performing the
769 * following compound.
771 * To ensure proper ordering, we therefore turn off zero copy if
772 * the client wants us to do more in this compound:
774 if (!nfsd4_last_compound_op(rqstp
))
775 rqstp
->rq_splice_ok
= false;
778 if ((status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
779 cstate
, &read
->rd_stateid
,
780 RD_STATE
, &read
->rd_filp
))) {
781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
786 read
->rd_rqstp
= rqstp
;
787 read
->rd_fhp
= &cstate
->current_fh
;
792 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
793 struct nfsd4_readdir
*readdir
)
795 u64 cookie
= readdir
->rd_cookie
;
796 static const nfs4_verifier zeroverf
;
798 /* no need to check permission - this will be done in nfsd_readdir() */
800 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
803 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
804 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
805 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
807 if ((cookie
== 1) || (cookie
== 2) ||
808 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
809 return nfserr_bad_cookie
;
811 readdir
->rd_rqstp
= rqstp
;
812 readdir
->rd_fhp
= &cstate
->current_fh
;
817 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
818 struct nfsd4_readlink
*readlink
)
820 readlink
->rl_rqstp
= rqstp
;
821 readlink
->rl_fhp
= &cstate
->current_fh
;
826 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
827 struct nfsd4_remove
*remove
)
831 if (locks_in_grace(SVC_NET(rqstp
)))
833 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
834 remove
->rm_name
, remove
->rm_namelen
);
836 fh_unlock(&cstate
->current_fh
);
837 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
843 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
844 struct nfsd4_rename
*rename
)
846 __be32 status
= nfserr_nofilehandle
;
848 if (!cstate
->save_fh
.fh_dentry
)
850 if (locks_in_grace(SVC_NET(rqstp
)) &&
851 !(cstate
->save_fh
.fh_export
->ex_flags
& NFSEXP_NOSUBTREECHECK
))
853 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
854 rename
->rn_snamelen
, &cstate
->current_fh
,
855 rename
->rn_tname
, rename
->rn_tnamelen
);
858 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
859 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
864 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
865 struct nfsd4_secinfo
*secinfo
)
868 struct svc_export
*exp
;
869 struct dentry
*dentry
;
872 fh_init(&resfh
, NFS4_FHSIZE
);
873 err
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_EXEC
);
876 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
877 secinfo
->si_name
, secinfo
->si_namelen
,
881 if (dentry
->d_inode
== NULL
) {
885 secinfo
->si_exp
= exp
;
887 if (cstate
->minorversion
)
888 /* See rfc 5661 section 2.6.3.1.1.8 */
889 fh_put(&cstate
->current_fh
);
894 nfsd4_secinfo_no_name(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
895 struct nfsd4_secinfo_no_name
*sin
)
899 switch (sin
->sin_style
) {
900 case NFS4_SECINFO_STYLE4_CURRENT_FH
:
902 case NFS4_SECINFO_STYLE4_PARENT
:
903 err
= nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
911 sin
->sin_exp
= exp_get(cstate
->current_fh
.fh_export
);
912 fh_put(&cstate
->current_fh
);
917 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
918 struct nfsd4_setattr
*setattr
)
920 __be32 status
= nfs_ok
;
923 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
924 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
925 &setattr
->sa_stateid
, WR_STATE
, NULL
);
927 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
931 err
= fh_want_write(&cstate
->current_fh
);
933 return nfserrno(err
);
936 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
941 if (setattr
->sa_acl
!= NULL
)
942 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
946 if (setattr
->sa_label
.len
)
947 status
= nfsd4_set_nfs4_label(rqstp
, &cstate
->current_fh
,
951 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
954 fh_drop_write(&cstate
->current_fh
);
958 static int fill_in_write_vector(struct kvec
*vec
, struct nfsd4_write
*write
)
961 int buflen
= write
->wr_buflen
;
963 vec
[0].iov_base
= write
->wr_head
.iov_base
;
964 vec
[0].iov_len
= min_t(int, buflen
, write
->wr_head
.iov_len
);
965 buflen
-= vec
[0].iov_len
;
968 vec
[i
].iov_base
= page_address(write
->wr_pagelist
[i
- 1]);
969 vec
[i
].iov_len
= min_t(int, PAGE_SIZE
, buflen
);
970 buflen
-= vec
[i
].iov_len
;
977 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
978 struct nfsd4_write
*write
)
980 stateid_t
*stateid
= &write
->wr_stateid
;
981 struct file
*filp
= NULL
;
982 __be32 status
= nfs_ok
;
986 /* no need to check permission - this will be done in nfsd_write() */
988 if (write
->wr_offset
>= OFFSET_MAX
)
991 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
992 cstate
, stateid
, WR_STATE
, &filp
);
994 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
998 cnt
= write
->wr_buflen
;
999 write
->wr_how_written
= write
->wr_stable_how
;
1000 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
1002 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
1003 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
1005 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
1006 write
->wr_offset
, rqstp
->rq_vec
, nvecs
,
1007 &cnt
, &write
->wr_how_written
);
1011 write
->wr_bytes_written
= cnt
;
1017 nfsd4_seek(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1018 struct nfsd4_seek
*seek
)
1024 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
1025 &seek
->seek_stateid
,
1028 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1032 switch (seek
->seek_whence
) {
1033 case NFS4_CONTENT_DATA
:
1036 case NFS4_CONTENT_HOLE
:
1040 status
= nfserr_union_notsupp
;
1045 * Note: This call does change file->f_pos, but nothing in NFSD
1046 * should ever file->f_pos.
1048 seek
->seek_pos
= vfs_llseek(file
, seek
->seek_offset
, whence
);
1049 if (seek
->seek_pos
< 0)
1050 status
= nfserrno(seek
->seek_pos
);
1051 else if (seek
->seek_pos
>= i_size_read(file_inode(file
)))
1052 seek
->seek_eof
= true;
1059 /* This routine never returns NFS_OK! If there are no other errors, it
1060 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1061 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1062 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1065 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1066 struct nfsd4_verify
*verify
)
1072 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
1076 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
1080 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
1081 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
1082 return nfserr_inval
;
1083 if (verify
->ve_attrlen
& 3)
1084 return nfserr_inval
;
1087 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1089 count
= 4 + (verify
->ve_attrlen
>> 2);
1090 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
1092 return nfserr_jukebox
;
1095 status
= nfsd4_encode_fattr_to_buf(&p
, count
, &cstate
->current_fh
,
1096 cstate
->current_fh
.fh_export
,
1097 cstate
->current_fh
.fh_dentry
,
1101 * If nfsd4_encode_fattr() ran out of space, assume that's because
1102 * the attributes are longer (hence different) than those given:
1104 if (status
== nfserr_resource
)
1105 status
= nfserr_not_same
;
1110 p
= buf
+ 1 + ntohl(buf
[0]);
1111 status
= nfserr_not_same
;
1112 if (ntohl(*p
++) != verify
->ve_attrlen
)
1114 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1115 status
= nfserr_same
;
1123 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1124 struct nfsd4_verify
*verify
)
1128 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1129 return status
== nfserr_not_same
? nfs_ok
: status
;
1133 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1134 struct nfsd4_verify
*verify
)
1138 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1139 return status
== nfserr_same
? nfs_ok
: status
;
1146 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
1151 static inline void nfsd4_increment_op_stats(u32 opnum
)
1153 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1154 nfsdstats
.nfs4_opcount
[opnum
]++;
1157 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
1159 typedef u32(*nfsd4op_rsize
)(struct svc_rqst
*, struct nfsd4_op
*op
);
1160 typedef void(*stateid_setter
)(struct nfsd4_compound_state
*, void *);
1161 typedef void(*stateid_getter
)(struct nfsd4_compound_state
*, void *);
1163 enum nfsd4_op_flags
{
1164 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
1165 ALLOWED_ON_ABSENT_FS
= 1 << 1, /* ops processed on absent fs */
1166 ALLOWED_AS_FIRST_OP
= 1 << 2, /* ops reqired first in compound */
1167 /* For rfc 5661 section 2.6.3.1.1: */
1168 OP_HANDLES_WRONGSEC
= 1 << 3,
1169 OP_IS_PUTFH_LIKE
= 1 << 4,
1171 * These are the ops whose result size we estimate before
1172 * encoding, to avoid performing an op then not being able to
1173 * respond or cache a response. This includes writes and setattrs
1174 * as well as the operations usually called "nonidempotent":
1176 OP_MODIFIES_SOMETHING
= 1 << 5,
1178 * Cache compounds containing these ops in the xid-based drc:
1179 * We use the DRC for compounds containing non-idempotent
1180 * operations, *except* those that are 4.1-specific (since
1181 * sessions provide their own EOS), and except for stateful
1182 * operations other than setclientid and setclientid_confirm
1183 * (since sequence numbers provide EOS for open, lock, etc in
1186 OP_CACHEME
= 1 << 6,
1188 * These are ops which clear current state id.
1190 OP_CLEAR_STATEID
= 1 << 7,
1193 struct nfsd4_operation
{
1194 nfsd4op_func op_func
;
1197 /* Try to get response size before operation */
1198 nfsd4op_rsize op_rsize_bop
;
1199 stateid_getter op_get_currentstateid
;
1200 stateid_setter op_set_currentstateid
;
1203 static struct nfsd4_operation nfsd4_ops
[];
1205 static const char *nfsd4_op_name(unsigned opnum
);
1208 * Enforce NFSv4.1 COMPOUND ordering rules:
1210 * Also note, enforced elsewhere:
1211 * - SEQUENCE other than as first op results in
1212 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1213 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1214 * (Enforced in nfsd4_bind_conn_to_session().)
1215 * - DESTROY_SESSION must be the final operation in a compound, if
1216 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1217 * (Enforced in nfsd4_destroy_session().)
1219 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1221 struct nfsd4_op
*op
= &args
->ops
[0];
1223 /* These ordering requirements don't apply to NFSv4.0: */
1224 if (args
->minorversion
== 0)
1226 /* This is weird, but OK, not our problem: */
1227 if (args
->opcnt
== 0)
1229 if (op
->status
== nfserr_op_illegal
)
1231 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1232 return nfserr_op_not_in_session
;
1233 if (op
->opnum
== OP_SEQUENCE
)
1235 if (args
->opcnt
!= 1)
1236 return nfserr_not_only_op
;
1240 static inline struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1242 return &nfsd4_ops
[op
->opnum
];
1245 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1247 if (op
->opnum
== OP_ILLEGAL
)
1249 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1252 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1254 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1255 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1256 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1257 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1258 struct nfsd4_operation
*thisd
;
1259 struct nfsd4_operation
*nextd
;
1261 thisd
= OPDESC(this);
1263 * Most ops check wronsec on our own; only the putfh-like ops
1264 * have special rules.
1266 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1269 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1270 * put-filehandle operation if we're not going to use the
1273 if (argp
->opcnt
== resp
->opcnt
)
1276 nextd
= OPDESC(next
);
1278 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1279 * errors themselves as necessary; others should check for them
1282 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1285 static void svcxdr_init_encode(struct svc_rqst
*rqstp
,
1286 struct nfsd4_compoundres
*resp
)
1288 struct xdr_stream
*xdr
= &resp
->xdr
;
1289 struct xdr_buf
*buf
= &rqstp
->rq_res
;
1290 struct kvec
*head
= buf
->head
;
1294 xdr
->p
= head
->iov_base
+ head
->iov_len
;
1295 xdr
->end
= head
->iov_base
+ PAGE_SIZE
- rqstp
->rq_auth_slack
;
1296 /* Tail and page_len should be zero at this point: */
1297 buf
->len
= buf
->head
[0].iov_len
;
1298 xdr
->scratch
.iov_len
= 0;
1299 xdr
->page_ptr
= buf
->pages
- 1;
1300 buf
->buflen
= PAGE_SIZE
* (1 + rqstp
->rq_page_end
- buf
->pages
)
1301 - rqstp
->rq_auth_slack
;
1308 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1309 struct nfsd4_compoundargs
*args
,
1310 struct nfsd4_compoundres
*resp
)
1312 struct nfsd4_op
*op
;
1313 struct nfsd4_operation
*opdesc
;
1314 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1315 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1316 struct svc_fh
*save_fh
= &cstate
->save_fh
;
1319 svcxdr_init_encode(rqstp
, resp
);
1320 resp
->tagp
= resp
->xdr
.p
;
1321 /* reserve space for: taglen, tag, and opcnt */
1322 xdr_reserve_space(&resp
->xdr
, 8 + args
->taglen
);
1323 resp
->taglen
= args
->taglen
;
1324 resp
->tag
= args
->tag
;
1325 resp
->rqstp
= rqstp
;
1326 cstate
->minorversion
= args
->minorversion
;
1327 fh_init(current_fh
, NFS4_FHSIZE
);
1328 fh_init(save_fh
, NFS4_FHSIZE
);
1330 * Don't use the deferral mechanism for NFSv4; compounds make it
1331 * too hard to avoid non-idempotency problems.
1333 rqstp
->rq_usedeferral
= false;
1336 * According to RFC3010, this takes precedence over all other errors.
1338 status
= nfserr_minor_vers_mismatch
;
1339 if (nfsd_minorversion(args
->minorversion
, NFSD_TEST
) <= 0)
1342 status
= nfs41_check_op_ordering(args
);
1345 op
->status
= status
;
1349 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1350 op
= &args
->ops
[resp
->opcnt
++];
1352 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1353 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1354 nfsd4_op_name(op
->opnum
));
1356 * The XDR decode routines may have pre-set op->status;
1357 * for example, if there is a miscellaneous XDR error
1358 * it will be set to nfserr_bad_xdr.
1361 if (op
->opnum
== OP_OPEN
)
1362 op
->status
= nfsd4_open_omfg(rqstp
, cstate
, op
);
1366 opdesc
= OPDESC(op
);
1368 if (!current_fh
->fh_dentry
) {
1369 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1370 op
->status
= nfserr_nofilehandle
;
1373 } else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
1374 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1375 op
->status
= nfserr_moved
;
1379 fh_clear_wcc(current_fh
);
1381 /* If op is non-idempotent */
1382 if (opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1384 * Don't execute this op if we couldn't encode a
1387 u32 plen
= opdesc
->op_rsize_bop(rqstp
, op
);
1389 * Plus if there's another operation, make sure
1390 * we'll have space to at least encode an error:
1392 if (resp
->opcnt
< args
->opcnt
)
1393 plen
+= COMPOUND_ERR_SLACK_SPACE
;
1394 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1400 if (opdesc
->op_get_currentstateid
)
1401 opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1402 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1405 if (opdesc
->op_set_currentstateid
)
1406 opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1408 if (opdesc
->op_flags
& OP_CLEAR_STATEID
)
1409 clear_current_stateid(cstate
);
1411 if (need_wrongsec_check(rqstp
))
1412 op
->status
= check_nfsd_access(current_fh
->fh_export
, rqstp
);
1416 /* Only from SEQUENCE */
1417 if (cstate
->status
== nfserr_replay_cache
) {
1418 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1419 status
= op
->status
;
1422 if (op
->status
== nfserr_replay_me
) {
1423 op
->replay
= &cstate
->replay_owner
->so_replay
;
1424 nfsd4_encode_replay(&resp
->xdr
, op
);
1425 status
= op
->status
= op
->replay
->rp_status
;
1427 nfsd4_encode_operation(resp
, op
);
1428 status
= op
->status
;
1431 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1432 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1433 be32_to_cpu(status
));
1435 nfsd4_cstate_clear_replay(cstate
);
1436 /* XXX Ugh, we need to get rid of this kind of special case: */
1437 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1438 fput(op
->u
.read
.rd_filp
);
1440 nfsd4_increment_op_stats(op
->opnum
);
1443 cstate
->status
= status
;
1446 BUG_ON(cstate
->replay_owner
);
1448 /* Reset deferral mechanism for RPC deferrals */
1449 rqstp
->rq_usedeferral
= true;
1450 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1454 #define op_encode_hdr_size (2)
1455 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1456 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1457 #define op_encode_change_info_maxsz (5)
1458 #define nfs4_fattr_bitmap_maxsz (4)
1460 /* We'll fall back on returning no lockowner if run out of space: */
1461 #define op_encode_lockowner_maxsz (0)
1462 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1464 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1466 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1467 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1468 op_encode_ace_maxsz)
1470 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1472 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1474 return (op_encode_hdr_size
) * sizeof(__be32
);
1477 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1479 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1482 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1484 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1487 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1489 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1490 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1494 * Note since this is an idempotent operation we won't insist on failing
1495 * the op prematurely if the estimate is too large. We may turn off splice
1496 * reads unnecessarily.
1498 static inline u32
nfsd4_getattr_rsize(struct svc_rqst
*rqstp
,
1499 struct nfsd4_op
*op
)
1501 u32
*bmap
= op
->u
.getattr
.ga_bmval
;
1502 u32 bmap0
= bmap
[0], bmap1
= bmap
[1], bmap2
= bmap
[2];
1505 if (bmap0
& FATTR4_WORD0_ACL
)
1506 return svc_max_payload(rqstp
);
1507 if (bmap0
& FATTR4_WORD0_FS_LOCATIONS
)
1508 return svc_max_payload(rqstp
);
1510 if (bmap1
& FATTR4_WORD1_OWNER
) {
1511 ret
+= IDMAP_NAMESZ
+ 4;
1512 bmap1
&= ~FATTR4_WORD1_OWNER
;
1514 if (bmap1
& FATTR4_WORD1_OWNER_GROUP
) {
1515 ret
+= IDMAP_NAMESZ
+ 4;
1516 bmap1
&= ~FATTR4_WORD1_OWNER_GROUP
;
1518 if (bmap0
& FATTR4_WORD0_FILEHANDLE
) {
1519 ret
+= NFS4_FHSIZE
+ 4;
1520 bmap0
&= ~FATTR4_WORD0_FILEHANDLE
;
1522 if (bmap2
& FATTR4_WORD2_SECURITY_LABEL
) {
1523 ret
+= NFSD4_MAX_SEC_LABEL_LEN
+ 12;
1524 bmap2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
1527 * Largest of remaining attributes are 16 bytes (e.g.,
1528 * supported_attributes)
1530 ret
+= 16 * (hweight32(bmap0
) + hweight32(bmap1
) + hweight32(bmap2
));
1531 /* bitmask, length */
1536 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1538 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1542 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1544 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1548 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1550 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1551 + op_encode_change_info_maxsz
+ 1
1552 + nfs4_fattr_bitmap_maxsz
1553 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1556 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1558 u32 maxcount
= 0, rlen
= 0;
1560 maxcount
= svc_max_payload(rqstp
);
1561 rlen
= min(op
->u
.read
.rd_length
, maxcount
);
1563 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1566 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1568 u32 maxcount
= 0, rlen
= 0;
1570 maxcount
= svc_max_payload(rqstp
);
1571 rlen
= min(op
->u
.readdir
.rd_maxcount
, maxcount
);
1573 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
+
1574 XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1577 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1579 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1583 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1585 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1586 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1589 static inline u32
nfsd4_sequence_rsize(struct svc_rqst
*rqstp
,
1590 struct nfsd4_op
*op
)
1592 return NFS4_MAX_SESSIONID_LEN
+ 20;
1595 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1597 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1600 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1602 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE
)) *
1606 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1608 return (op_encode_hdr_size
+ 2 + op_encode_verifier_maxsz
) * sizeof(__be32
);
1611 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1613 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
1614 1 + 1 + /* eir_flags, spr_how */\
1615 4 + /* spo_must_enforce & _allow with bitmap */\
1616 2 + /*eir_server_owner.so_minor_id */\
1617 /* eir_server_owner.so_major_id<> */\
1618 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1619 /* eir_server_scope<> */\
1620 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1621 1 + /* eir_server_impl_id array length */\
1622 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
1625 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1627 return (op_encode_hdr_size
+ \
1628 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
1629 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
1632 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1634 return (op_encode_hdr_size
+ \
1635 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
1636 2 + /* csr_sequence, csr_flags */\
1637 op_encode_channel_attrs_maxsz
+ \
1638 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
1641 static struct nfsd4_operation nfsd4_ops
[] = {
1643 .op_func
= (nfsd4op_func
)nfsd4_access
,
1644 .op_name
= "OP_ACCESS",
1647 .op_func
= (nfsd4op_func
)nfsd4_close
,
1648 .op_flags
= OP_MODIFIES_SOMETHING
,
1649 .op_name
= "OP_CLOSE",
1650 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1651 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_closestateid
,
1652 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_closestateid
,
1655 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1656 .op_flags
= OP_MODIFIES_SOMETHING
,
1657 .op_name
= "OP_COMMIT",
1658 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_commit_rsize
,
1661 .op_func
= (nfsd4op_func
)nfsd4_create
,
1662 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
1663 .op_name
= "OP_CREATE",
1664 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_rsize
,
1666 [OP_DELEGRETURN
] = {
1667 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1668 .op_flags
= OP_MODIFIES_SOMETHING
,
1669 .op_name
= "OP_DELEGRETURN",
1670 .op_rsize_bop
= nfsd4_only_status_rsize
,
1671 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_delegreturnstateid
,
1674 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1675 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1676 .op_rsize_bop
= nfsd4_getattr_rsize
,
1677 .op_name
= "OP_GETATTR",
1680 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1681 .op_name
= "OP_GETFH",
1684 .op_func
= (nfsd4op_func
)nfsd4_link
,
1685 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
1687 .op_name
= "OP_LINK",
1688 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_link_rsize
,
1691 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1692 .op_flags
= OP_MODIFIES_SOMETHING
,
1693 .op_name
= "OP_LOCK",
1694 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_lock_rsize
,
1695 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_lockstateid
,
1698 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1699 .op_name
= "OP_LOCKT",
1702 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1703 .op_flags
= OP_MODIFIES_SOMETHING
,
1704 .op_name
= "OP_LOCKU",
1705 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1706 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_lockustateid
,
1709 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1710 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1711 .op_name
= "OP_LOOKUP",
1714 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1715 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1716 .op_name
= "OP_LOOKUPP",
1719 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1720 .op_name
= "OP_NVERIFY",
1723 .op_func
= (nfsd4op_func
)nfsd4_open
,
1724 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1725 .op_name
= "OP_OPEN",
1726 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_open_rsize
,
1727 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_openstateid
,
1729 [OP_OPEN_CONFIRM
] = {
1730 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1731 .op_flags
= OP_MODIFIES_SOMETHING
,
1732 .op_name
= "OP_OPEN_CONFIRM",
1733 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1735 [OP_OPEN_DOWNGRADE
] = {
1736 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1737 .op_flags
= OP_MODIFIES_SOMETHING
,
1738 .op_name
= "OP_OPEN_DOWNGRADE",
1739 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1740 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_opendowngradestateid
,
1741 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_opendowngradestateid
,
1744 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1745 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1746 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1747 .op_name
= "OP_PUTFH",
1748 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1751 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1752 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1753 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1754 .op_name
= "OP_PUTPUBFH",
1755 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1758 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1759 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1760 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1761 .op_name
= "OP_PUTROOTFH",
1762 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1765 .op_func
= (nfsd4op_func
)nfsd4_read
,
1766 .op_name
= "OP_READ",
1767 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_read_rsize
,
1768 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_readstateid
,
1771 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1772 .op_name
= "OP_READDIR",
1773 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_readdir_rsize
,
1776 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1777 .op_name
= "OP_READLINK",
1780 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1781 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1782 .op_name
= "OP_REMOVE",
1783 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_remove_rsize
,
1786 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1787 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1788 .op_name
= "OP_RENAME",
1789 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_rename_rsize
,
1792 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1793 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1794 | OP_MODIFIES_SOMETHING
,
1795 .op_name
= "OP_RENEW",
1796 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1800 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1801 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1802 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
1803 .op_name
= "OP_RESTOREFH",
1804 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1807 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1808 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1809 .op_name
= "OP_SAVEFH",
1810 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1813 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1814 .op_flags
= OP_HANDLES_WRONGSEC
,
1815 .op_name
= "OP_SECINFO",
1818 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1819 .op_name
= "OP_SETATTR",
1820 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1821 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setattr_rsize
,
1822 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_setattrstateid
,
1824 [OP_SETCLIENTID
] = {
1825 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1826 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1827 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1828 .op_name
= "OP_SETCLIENTID",
1829 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setclientid_rsize
,
1831 [OP_SETCLIENTID_CONFIRM
] = {
1832 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1833 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1834 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1835 .op_name
= "OP_SETCLIENTID_CONFIRM",
1836 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1839 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1840 .op_name
= "OP_VERIFY",
1843 .op_func
= (nfsd4op_func
)nfsd4_write
,
1844 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1845 .op_name
= "OP_WRITE",
1846 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1847 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_writestateid
,
1849 [OP_RELEASE_LOCKOWNER
] = {
1850 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1851 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1852 | OP_MODIFIES_SOMETHING
,
1853 .op_name
= "OP_RELEASE_LOCKOWNER",
1854 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1857 /* NFSv4.1 operations */
1858 [OP_EXCHANGE_ID
] = {
1859 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1860 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1861 | OP_MODIFIES_SOMETHING
,
1862 .op_name
= "OP_EXCHANGE_ID",
1863 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_exchange_id_rsize
,
1865 [OP_BACKCHANNEL_CTL
] = {
1866 .op_func
= (nfsd4op_func
)nfsd4_backchannel_ctl
,
1867 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1868 .op_name
= "OP_BACKCHANNEL_CTL",
1869 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1871 [OP_BIND_CONN_TO_SESSION
] = {
1872 .op_func
= (nfsd4op_func
)nfsd4_bind_conn_to_session
,
1873 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1874 | OP_MODIFIES_SOMETHING
,
1875 .op_name
= "OP_BIND_CONN_TO_SESSION",
1876 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_bind_conn_to_session_rsize
,
1878 [OP_CREATE_SESSION
] = {
1879 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1880 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1881 | OP_MODIFIES_SOMETHING
,
1882 .op_name
= "OP_CREATE_SESSION",
1883 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_session_rsize
,
1885 [OP_DESTROY_SESSION
] = {
1886 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1887 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1888 | OP_MODIFIES_SOMETHING
,
1889 .op_name
= "OP_DESTROY_SESSION",
1890 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1893 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1894 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1895 .op_name
= "OP_SEQUENCE",
1897 [OP_DESTROY_CLIENTID
] = {
1898 .op_func
= (nfsd4op_func
)nfsd4_destroy_clientid
,
1899 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1900 | OP_MODIFIES_SOMETHING
,
1901 .op_name
= "OP_DESTROY_CLIENTID",
1902 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1904 [OP_RECLAIM_COMPLETE
] = {
1905 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1906 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1907 .op_name
= "OP_RECLAIM_COMPLETE",
1908 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1910 [OP_SECINFO_NO_NAME
] = {
1911 .op_func
= (nfsd4op_func
)nfsd4_secinfo_no_name
,
1912 .op_flags
= OP_HANDLES_WRONGSEC
,
1913 .op_name
= "OP_SECINFO_NO_NAME",
1915 [OP_TEST_STATEID
] = {
1916 .op_func
= (nfsd4op_func
)nfsd4_test_stateid
,
1917 .op_flags
= ALLOWED_WITHOUT_FH
,
1918 .op_name
= "OP_TEST_STATEID",
1920 [OP_FREE_STATEID
] = {
1921 .op_func
= (nfsd4op_func
)nfsd4_free_stateid
,
1922 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1923 .op_name
= "OP_FREE_STATEID",
1924 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_freestateid
,
1925 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1928 /* NFSv4.2 operations */
1930 .op_func
= (nfsd4op_func
)nfsd4_seek
,
1931 .op_name
= "OP_SEEK",
1935 int nfsd4_max_reply(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1937 struct nfsd4_operation
*opdesc
;
1938 nfsd4op_rsize estimator
;
1940 if (op
->opnum
== OP_ILLEGAL
)
1941 return op_encode_hdr_size
* sizeof(__be32
);
1942 opdesc
= OPDESC(op
);
1943 estimator
= opdesc
->op_rsize_bop
;
1944 return estimator
? estimator(rqstp
, op
) : PAGE_SIZE
;
1947 void warn_on_nonidempotent_op(struct nfsd4_op
*op
)
1949 if (OPDESC(op
)->op_flags
& OP_MODIFIES_SOMETHING
) {
1950 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
1951 op
->opnum
, nfsd4_op_name(op
->opnum
));
1956 static const char *nfsd4_op_name(unsigned opnum
)
1958 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1959 return nfsd4_ops
[opnum
].op_name
;
1960 return "unknown_operation";
1963 #define nfsd4_voidres nfsd4_voidargs
1964 struct nfsd4_voidargs
{ int dummy
; };
1966 static struct svc_procedure nfsd_procedures4
[2] = {
1968 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
1969 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
1970 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
1971 .pc_ressize
= sizeof(struct nfsd4_voidres
),
1972 .pc_cachetype
= RC_NOCACHE
,
1975 [NFSPROC4_COMPOUND
] = {
1976 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
1977 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
1978 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
1979 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
1980 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
1981 .pc_release
= nfsd4_release_compoundargs
,
1982 .pc_cachetype
= RC_NOCACHE
,
1983 .pc_xdrressize
= NFSD_BUFSIZE
/4,
1987 struct svc_version nfsd_version4
= {
1990 .vs_proc
= nfsd_procedures4
,
1991 .vs_dispatch
= nfsd_dispatch
,
1992 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,