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/falloc.h>
37 #include <linux/slab.h>
43 #include "current_stateid.h"
47 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
48 #include <linux/security.h>
51 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
53 struct inode
*inode
= resfh
->fh_dentry
->d_inode
;
56 mutex_lock(&inode
->i_mutex
);
57 status
= security_inode_setsecctx(resfh
->fh_dentry
,
58 label
->data
, label
->len
);
59 mutex_unlock(&inode
->i_mutex
);
63 * XXX: We should really fail the whole open, but we may
64 * already have created a new file, so it may be too
65 * late. For now this seems the least of evils:
67 bmval
[2] &= ~FATTR4_WORD2_SECURITY_LABEL
;
73 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
77 #define NFSDDBG_FACILITY NFSDDBG_PROC
79 static u32 nfsd_attrmask
[] = {
80 NFSD_WRITEABLE_ATTRS_WORD0
,
81 NFSD_WRITEABLE_ATTRS_WORD1
,
82 NFSD_WRITEABLE_ATTRS_WORD2
85 static u32 nfsd41_ex_attrmask
[] = {
86 NFSD_SUPPATTR_EXCLCREAT_WORD0
,
87 NFSD_SUPPATTR_EXCLCREAT_WORD1
,
88 NFSD_SUPPATTR_EXCLCREAT_WORD2
92 check_attr_support(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
93 u32
*bmval
, u32
*writable
)
95 struct dentry
*dentry
= cstate
->current_fh
.fh_dentry
;
98 * Check about attributes are supported by the NFSv4 server or not.
99 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
101 if ((bmval
[0] & ~nfsd_suppattrs0(cstate
->minorversion
)) ||
102 (bmval
[1] & ~nfsd_suppattrs1(cstate
->minorversion
)) ||
103 (bmval
[2] & ~nfsd_suppattrs2(cstate
->minorversion
)))
104 return nfserr_attrnotsupp
;
107 * Check FATTR4_WORD0_ACL can be supported
108 * in current environment or not.
110 if (bmval
[0] & FATTR4_WORD0_ACL
) {
111 if (!IS_POSIXACL(dentry
->d_inode
))
112 return nfserr_attrnotsupp
;
116 * According to spec, read-only attributes return ERR_INVAL.
119 if ((bmval
[0] & ~writable
[0]) || (bmval
[1] & ~writable
[1]) ||
120 (bmval
[2] & ~writable
[2]))
128 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
129 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
131 __be32 status
= nfs_ok
;
133 if (open
->op_create
== NFS4_OPEN_CREATE
) {
134 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
135 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
136 status
= check_attr_support(rqstp
, cstate
,
137 open
->op_bmval
, nfsd_attrmask
);
138 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
139 status
= check_attr_support(rqstp
, cstate
,
140 open
->op_bmval
, nfsd41_ex_attrmask
);
147 is_create_with_attrs(struct nfsd4_open
*open
)
149 return open
->op_create
== NFS4_OPEN_CREATE
150 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
151 || open
->op_createmode
== NFS4_CREATE_GUARDED
152 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
156 * if error occurs when setting the acl, just clear the acl bit
157 * in the returned attr bitmap.
160 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
161 struct nfs4_acl
*acl
, u32
*bmval
)
165 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
168 * We should probably fail the whole open at this point,
169 * but we've already created the file, so it's too late;
170 * So this seems the least of evils:
172 bmval
[0] &= ~FATTR4_WORD0_ACL
;
176 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
179 dget(src
->fh_dentry
);
181 exp_get(src
->fh_export
);
186 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
190 if (open
->op_truncate
&&
191 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
194 accmode
|= NFSD_MAY_READ_IF_EXEC
;
196 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
197 accmode
|= NFSD_MAY_READ
;
198 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
199 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
200 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
201 accmode
|= NFSD_MAY_WRITE
;
203 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
208 static __be32
nfsd_check_obj_isreg(struct svc_fh
*fh
)
210 umode_t mode
= fh
->fh_dentry
->d_inode
->i_mode
;
217 * Using err_symlink as our catch-all case may look odd; but
218 * there's no other obvious error for this case in 4.0, and we
219 * happen to know that it will cause the linux v4 client to do
220 * the right thing on attempts to open something other than a
223 return nfserr_symlink
;
226 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
*resfh
)
228 if (nfsd4_has_session(cstate
))
230 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
235 do_open_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
**resfh
)
237 struct svc_fh
*current_fh
= &cstate
->current_fh
;
241 *resfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
243 return nfserr_jukebox
;
244 fh_init(*resfh
, NFS4_FHSIZE
);
245 open
->op_truncate
= 0;
247 if (open
->op_create
) {
248 /* FIXME: check session persistence and pnfs flags.
249 * The nfsv4.1 spec requires the following semantics:
251 * Persistent | pNFS | Server REQUIRED | Client Allowed
252 * Reply Cache | server | |
253 * -------------+--------+-----------------+--------------------
254 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
256 * | | and EXCLUSIVE4 | or EXCLUSIVE4
258 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
259 * yes | no | GUARDED4 | GUARDED4
260 * yes | yes | GUARDED4 | GUARDED4
264 * Note: create modes (UNCHECKED,GUARDED...) are the same
265 * in NFSv4 as in v3 except EXCLUSIVE4_1.
267 status
= do_nfsd_create(rqstp
, current_fh
, open
->op_fname
.data
,
268 open
->op_fname
.len
, &open
->op_iattr
,
269 *resfh
, open
->op_createmode
,
270 (u32
*)open
->op_verf
.data
,
271 &open
->op_truncate
, &open
->op_created
);
273 if (!status
&& open
->op_label
.len
)
274 nfsd4_security_inode_setsecctx(*resfh
, &open
->op_label
, open
->op_bmval
);
277 * Following rfc 3530 14.2.16, use the returned bitmask
278 * to indicate which attributes we used to store the
281 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
282 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
283 FATTR4_WORD1_TIME_MODIFY
);
286 * Note this may exit with the parent still locked.
287 * We will hold the lock until nfsd4_open's final
288 * lookup, to prevent renames or unlinks until we've had
289 * a chance to an acquire a delegation if appropriate.
291 status
= nfsd_lookup(rqstp
, current_fh
,
292 open
->op_fname
.data
, open
->op_fname
.len
, *resfh
);
295 status
= nfsd_check_obj_isreg(*resfh
);
299 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
300 do_set_nfs4_acl(rqstp
, *resfh
, open
->op_acl
, open
->op_bmval
);
302 nfsd4_set_open_owner_reply_cache(cstate
, open
, *resfh
);
303 accmode
= NFSD_MAY_NOP
;
304 if (open
->op_created
||
305 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
306 accmode
|= NFSD_MAY_OWNER_OVERRIDE
;
307 status
= do_open_permission(rqstp
, *resfh
, open
, accmode
);
308 set_change_info(&open
->op_cinfo
, current_fh
);
314 do_open_fhandle(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
316 struct svc_fh
*current_fh
= &cstate
->current_fh
;
320 /* We don't know the target directory, and therefore can not
321 * set the change info
324 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
326 nfsd4_set_open_owner_reply_cache(cstate
, open
, current_fh
);
328 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
329 (open
->op_iattr
.ia_size
== 0);
331 * In the delegation case, the client is telling us about an
332 * open that it *already* performed locally, some time ago. We
333 * should let it succeed now if possible.
335 * In the case of a CLAIM_FH open, on the other hand, the client
336 * may be counting on us to enforce permissions (the Linux 4.1
337 * client uses this for normal opens, for example).
339 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
)
340 accmode
= NFSD_MAY_OWNER_OVERRIDE
;
342 status
= do_open_permission(rqstp
, current_fh
, open
, accmode
);
348 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
350 struct nfsd4_sessionid
*sid
=
351 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
353 clid
->cl_boot
= sid
->clientid
.cl_boot
;
354 clid
->cl_id
= sid
->clientid
.cl_id
;
358 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
359 struct nfsd4_open
*open
)
362 struct svc_fh
*resfh
= NULL
;
363 struct nfsd4_compoundres
*resp
;
364 struct net
*net
= SVC_NET(rqstp
);
365 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
367 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
368 (int)open
->op_fname
.len
, open
->op_fname
.data
,
371 /* This check required by spec. */
372 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
375 open
->op_created
= 0;
378 * Before RECLAIM_COMPLETE done, server should deny new lock
380 if (nfsd4_has_session(cstate
) &&
381 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
382 &cstate
->session
->se_client
->cl_flags
) &&
383 open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
386 if (nfsd4_has_session(cstate
))
387 copy_clientid(&open
->op_clientid
, cstate
->session
);
389 /* check seqid for replay. set nfs4_owner */
390 resp
= rqstp
->rq_resp
;
391 status
= nfsd4_process_open1(&resp
->cstate
, open
, nn
);
392 if (status
== nfserr_replay_me
) {
393 struct nfs4_replay
*rp
= &open
->op_openowner
->oo_owner
.so_replay
;
394 fh_put(&cstate
->current_fh
);
395 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
397 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
399 dprintk("nfsd4_open: replay failed"
400 " restoring previous filehandle\n");
402 status
= nfserr_replay_me
;
406 if (open
->op_xdr_error
) {
407 status
= open
->op_xdr_error
;
411 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
415 /* Openowner is now set, so sequence id will get bumped. Now we need
416 * these checks before we do any creates: */
417 status
= nfserr_grace
;
418 if (locks_in_grace(net
) && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
420 status
= nfserr_no_grace
;
421 if (!locks_in_grace(net
) && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
424 switch (open
->op_claim_type
) {
425 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
426 case NFS4_OPEN_CLAIM_NULL
:
427 status
= do_open_lookup(rqstp
, cstate
, open
, &resfh
);
431 case NFS4_OPEN_CLAIM_PREVIOUS
:
432 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
436 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
437 case NFS4_OPEN_CLAIM_FH
:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
439 status
= do_open_fhandle(rqstp
, cstate
, open
);
442 resfh
= &cstate
->current_fh
;
444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
445 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
446 dprintk("NFSD: unsupported OPEN claim type %d\n",
447 open
->op_claim_type
);
448 status
= nfserr_notsupp
;
451 dprintk("NFSD: Invalid OPEN claim type %d\n",
452 open
->op_claim_type
);
453 status
= nfserr_inval
;
457 * nfsd4_process_open2() does the actual opening of the file. If
458 * successful, it (1) truncates the file if open->op_truncate was
459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
461 status
= nfsd4_process_open2(rqstp
, resfh
, open
);
462 WARN(status
&& open
->op_created
,
463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
464 be32_to_cpu(status
));
466 if (resfh
&& resfh
!= &cstate
->current_fh
) {
467 fh_dup2(&cstate
->current_fh
, resfh
);
471 nfsd4_cleanup_open_state(cstate
, open
, status
);
472 nfsd4_bump_seqid(cstate
, status
);
477 * OPEN is the only seqid-mutating operation whose decoding can fail
478 * with a seqid-mutating error (specifically, decoding of user names in
479 * the attributes). Therefore we have to do some processing to look up
480 * the stateowner so that we can bump the seqid.
482 static __be32
nfsd4_open_omfg(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_op
*op
)
484 struct nfsd4_open
*open
= (struct nfsd4_open
*)&op
->u
;
486 if (!seqid_mutating_err(ntohl(op
->status
)))
488 if (nfsd4_has_session(cstate
))
490 open
->op_xdr_error
= op
->status
;
491 return nfsd4_open(rqstp
, cstate
, open
);
495 * filehandle-manipulating ops.
498 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
499 struct svc_fh
**getfh
)
501 if (!cstate
->current_fh
.fh_dentry
)
502 return nfserr_nofilehandle
;
504 *getfh
= &cstate
->current_fh
;
509 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
510 struct nfsd4_putfh
*putfh
)
512 fh_put(&cstate
->current_fh
);
513 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
514 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
516 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
520 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
525 fh_put(&cstate
->current_fh
);
526 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
531 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
534 if (!cstate
->save_fh
.fh_dentry
)
535 return nfserr_restorefh
;
537 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
538 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
539 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
540 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
546 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
549 if (!cstate
->current_fh
.fh_dentry
)
550 return nfserr_nofilehandle
;
552 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
553 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
554 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
555 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
564 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
565 struct nfsd4_access
*access
)
567 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
570 access
->ac_resp_access
= access
->ac_req_access
;
571 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
572 &access
->ac_supported
);
575 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
578 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
581 * This is opaque to client, so no need to byte-swap. Use
582 * __force to keep sparse happy
584 verf
[0] = (__force __be32
)nn
->nfssvc_boot
.tv_sec
;
585 verf
[1] = (__force __be32
)nn
->nfssvc_boot
.tv_usec
;
586 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
590 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
591 struct nfsd4_commit
*commit
)
593 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
594 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
599 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
600 struct nfsd4_create
*create
)
606 fh_init(&resfh
, NFS4_FHSIZE
);
608 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
613 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
618 switch (create
->cr_type
) {
620 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
621 create
->cr_name
, create
->cr_namelen
,
622 create
->cr_data
, &resfh
);
626 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
627 if (MAJOR(rdev
) != create
->cr_specdata1
||
628 MINOR(rdev
) != create
->cr_specdata2
)
630 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
631 create
->cr_name
, create
->cr_namelen
,
632 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
636 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
637 if (MAJOR(rdev
) != create
->cr_specdata1
||
638 MINOR(rdev
) != create
->cr_specdata2
)
640 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
641 create
->cr_name
, create
->cr_namelen
,
642 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
646 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
647 create
->cr_name
, create
->cr_namelen
,
648 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
652 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
653 create
->cr_name
, create
->cr_namelen
,
654 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
658 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
659 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
660 create
->cr_name
, create
->cr_namelen
,
661 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
665 status
= nfserr_badtype
;
671 if (create
->cr_label
.len
)
672 nfsd4_security_inode_setsecctx(&resfh
, &create
->cr_label
, create
->cr_bmval
);
674 if (create
->cr_acl
!= NULL
)
675 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
678 fh_unlock(&cstate
->current_fh
);
679 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
680 fh_dup2(&cstate
->current_fh
, &resfh
);
687 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
688 struct nfsd4_getattr
*getattr
)
692 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
696 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
699 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
700 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
701 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
703 getattr
->ga_fhp
= &cstate
->current_fh
;
708 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
709 struct nfsd4_link
*link
)
711 __be32 status
= nfserr_nofilehandle
;
713 if (!cstate
->save_fh
.fh_dentry
)
715 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
716 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
718 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
722 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
724 struct svc_fh tmp_fh
;
727 fh_init(&tmp_fh
, NFS4_FHSIZE
);
728 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
731 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
736 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
740 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
743 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
747 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
748 struct nfsd4_lookup
*lookup
)
750 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
751 lookup
->lo_name
, lookup
->lo_len
,
752 &cstate
->current_fh
);
756 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
757 struct nfsd4_read
*read
)
761 /* no need to check permission - this will be done in nfsd_read() */
763 read
->rd_filp
= NULL
;
764 if (read
->rd_offset
>= OFFSET_MAX
)
768 * If we do a zero copy read, then a client will see read data
769 * that reflects the state of the file *after* performing the
770 * following compound.
772 * To ensure proper ordering, we therefore turn off zero copy if
773 * the client wants us to do more in this compound:
775 if (!nfsd4_last_compound_op(rqstp
))
776 clear_bit(RQ_SPLICE_OK
, &rqstp
->rq_flags
);
779 if ((status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
780 cstate
, &read
->rd_stateid
,
781 RD_STATE
, &read
->rd_filp
))) {
782 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
787 read
->rd_rqstp
= rqstp
;
788 read
->rd_fhp
= &cstate
->current_fh
;
793 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
794 struct nfsd4_readdir
*readdir
)
796 u64 cookie
= readdir
->rd_cookie
;
797 static const nfs4_verifier zeroverf
;
799 /* no need to check permission - this will be done in nfsd_readdir() */
801 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
804 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
805 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
806 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
808 if ((cookie
== 1) || (cookie
== 2) ||
809 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
810 return nfserr_bad_cookie
;
812 readdir
->rd_rqstp
= rqstp
;
813 readdir
->rd_fhp
= &cstate
->current_fh
;
818 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
819 struct nfsd4_readlink
*readlink
)
821 readlink
->rl_rqstp
= rqstp
;
822 readlink
->rl_fhp
= &cstate
->current_fh
;
827 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
828 struct nfsd4_remove
*remove
)
832 if (locks_in_grace(SVC_NET(rqstp
)))
834 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
835 remove
->rm_name
, remove
->rm_namelen
);
837 fh_unlock(&cstate
->current_fh
);
838 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
844 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
845 struct nfsd4_rename
*rename
)
847 __be32 status
= nfserr_nofilehandle
;
849 if (!cstate
->save_fh
.fh_dentry
)
851 if (locks_in_grace(SVC_NET(rqstp
)) &&
852 !(cstate
->save_fh
.fh_export
->ex_flags
& NFSEXP_NOSUBTREECHECK
))
854 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
855 rename
->rn_snamelen
, &cstate
->current_fh
,
856 rename
->rn_tname
, rename
->rn_tnamelen
);
859 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
860 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
865 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
866 struct nfsd4_secinfo
*secinfo
)
869 struct svc_export
*exp
;
870 struct dentry
*dentry
;
873 fh_init(&resfh
, NFS4_FHSIZE
);
874 err
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_EXEC
);
877 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
878 secinfo
->si_name
, secinfo
->si_namelen
,
882 if (dentry
->d_inode
== NULL
) {
886 secinfo
->si_exp
= exp
;
888 if (cstate
->minorversion
)
889 /* See rfc 5661 section 2.6.3.1.1.8 */
890 fh_put(&cstate
->current_fh
);
895 nfsd4_secinfo_no_name(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
896 struct nfsd4_secinfo_no_name
*sin
)
900 switch (sin
->sin_style
) {
901 case NFS4_SECINFO_STYLE4_CURRENT_FH
:
903 case NFS4_SECINFO_STYLE4_PARENT
:
904 err
= nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
912 sin
->sin_exp
= exp_get(cstate
->current_fh
.fh_export
);
913 fh_put(&cstate
->current_fh
);
918 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
919 struct nfsd4_setattr
*setattr
)
921 __be32 status
= nfs_ok
;
924 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
925 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
926 &setattr
->sa_stateid
, WR_STATE
, NULL
);
928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
932 err
= fh_want_write(&cstate
->current_fh
);
934 return nfserrno(err
);
937 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
942 if (setattr
->sa_acl
!= NULL
)
943 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
947 if (setattr
->sa_label
.len
)
948 status
= nfsd4_set_nfs4_label(rqstp
, &cstate
->current_fh
,
952 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
955 fh_drop_write(&cstate
->current_fh
);
959 static int fill_in_write_vector(struct kvec
*vec
, struct nfsd4_write
*write
)
962 int buflen
= write
->wr_buflen
;
964 vec
[0].iov_base
= write
->wr_head
.iov_base
;
965 vec
[0].iov_len
= min_t(int, buflen
, write
->wr_head
.iov_len
);
966 buflen
-= vec
[0].iov_len
;
969 vec
[i
].iov_base
= page_address(write
->wr_pagelist
[i
- 1]);
970 vec
[i
].iov_len
= min_t(int, PAGE_SIZE
, buflen
);
971 buflen
-= vec
[i
].iov_len
;
978 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
979 struct nfsd4_write
*write
)
981 stateid_t
*stateid
= &write
->wr_stateid
;
982 struct file
*filp
= NULL
;
983 __be32 status
= nfs_ok
;
987 /* no need to check permission - this will be done in nfsd_write() */
989 if (write
->wr_offset
>= OFFSET_MAX
)
992 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
993 cstate
, stateid
, WR_STATE
, &filp
);
995 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
999 cnt
= write
->wr_buflen
;
1000 write
->wr_how_written
= write
->wr_stable_how
;
1001 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
1003 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
1004 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
1006 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
1007 write
->wr_offset
, rqstp
->rq_vec
, nvecs
,
1008 &cnt
, &write
->wr_how_written
);
1012 write
->wr_bytes_written
= cnt
;
1018 nfsd4_fallocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1019 struct nfsd4_fallocate
*fallocate
, int flags
)
1021 __be32 status
= nfserr_notsupp
;
1024 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
1025 &fallocate
->falloc_stateid
,
1027 if (status
!= nfs_ok
) {
1028 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1032 status
= nfsd4_vfs_fallocate(rqstp
, &cstate
->current_fh
, file
,
1033 fallocate
->falloc_offset
,
1034 fallocate
->falloc_length
,
1041 nfsd4_allocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1042 struct nfsd4_fallocate
*fallocate
)
1044 return nfsd4_fallocate(rqstp
, cstate
, fallocate
, 0);
1048 nfsd4_deallocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1049 struct nfsd4_fallocate
*fallocate
)
1051 return nfsd4_fallocate(rqstp
, cstate
, fallocate
,
1052 FALLOC_FL_PUNCH_HOLE
| FALLOC_FL_KEEP_SIZE
);
1056 nfsd4_seek(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1057 struct nfsd4_seek
*seek
)
1063 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
1064 &seek
->seek_stateid
,
1067 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1071 switch (seek
->seek_whence
) {
1072 case NFS4_CONTENT_DATA
:
1075 case NFS4_CONTENT_HOLE
:
1079 status
= nfserr_union_notsupp
;
1084 * Note: This call does change file->f_pos, but nothing in NFSD
1085 * should ever file->f_pos.
1087 seek
->seek_pos
= vfs_llseek(file
, seek
->seek_offset
, whence
);
1088 if (seek
->seek_pos
< 0)
1089 status
= nfserrno(seek
->seek_pos
);
1090 else if (seek
->seek_pos
>= i_size_read(file_inode(file
)))
1091 seek
->seek_eof
= true;
1098 /* This routine never returns NFS_OK! If there are no other errors, it
1099 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1100 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1101 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1104 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1105 struct nfsd4_verify
*verify
)
1111 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
1115 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
1119 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
1120 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
1121 return nfserr_inval
;
1122 if (verify
->ve_attrlen
& 3)
1123 return nfserr_inval
;
1126 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1128 count
= 4 + (verify
->ve_attrlen
>> 2);
1129 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
1131 return nfserr_jukebox
;
1134 status
= nfsd4_encode_fattr_to_buf(&p
, count
, &cstate
->current_fh
,
1135 cstate
->current_fh
.fh_export
,
1136 cstate
->current_fh
.fh_dentry
,
1140 * If nfsd4_encode_fattr() ran out of space, assume that's because
1141 * the attributes are longer (hence different) than those given:
1143 if (status
== nfserr_resource
)
1144 status
= nfserr_not_same
;
1149 p
= buf
+ 1 + ntohl(buf
[0]);
1150 status
= nfserr_not_same
;
1151 if (ntohl(*p
++) != verify
->ve_attrlen
)
1153 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1154 status
= nfserr_same
;
1162 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1163 struct nfsd4_verify
*verify
)
1167 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1168 return status
== nfserr_not_same
? nfs_ok
: status
;
1172 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1173 struct nfsd4_verify
*verify
)
1177 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1178 return status
== nfserr_same
? nfs_ok
: status
;
1185 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
1190 static inline void nfsd4_increment_op_stats(u32 opnum
)
1192 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1193 nfsdstats
.nfs4_opcount
[opnum
]++;
1196 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
1198 typedef u32(*nfsd4op_rsize
)(struct svc_rqst
*, struct nfsd4_op
*op
);
1199 typedef void(*stateid_setter
)(struct nfsd4_compound_state
*, void *);
1200 typedef void(*stateid_getter
)(struct nfsd4_compound_state
*, void *);
1202 enum nfsd4_op_flags
{
1203 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
1204 ALLOWED_ON_ABSENT_FS
= 1 << 1, /* ops processed on absent fs */
1205 ALLOWED_AS_FIRST_OP
= 1 << 2, /* ops reqired first in compound */
1206 /* For rfc 5661 section 2.6.3.1.1: */
1207 OP_HANDLES_WRONGSEC
= 1 << 3,
1208 OP_IS_PUTFH_LIKE
= 1 << 4,
1210 * These are the ops whose result size we estimate before
1211 * encoding, to avoid performing an op then not being able to
1212 * respond or cache a response. This includes writes and setattrs
1213 * as well as the operations usually called "nonidempotent":
1215 OP_MODIFIES_SOMETHING
= 1 << 5,
1217 * Cache compounds containing these ops in the xid-based drc:
1218 * We use the DRC for compounds containing non-idempotent
1219 * operations, *except* those that are 4.1-specific (since
1220 * sessions provide their own EOS), and except for stateful
1221 * operations other than setclientid and setclientid_confirm
1222 * (since sequence numbers provide EOS for open, lock, etc in
1225 OP_CACHEME
= 1 << 6,
1227 * These are ops which clear current state id.
1229 OP_CLEAR_STATEID
= 1 << 7,
1232 struct nfsd4_operation
{
1233 nfsd4op_func op_func
;
1236 /* Try to get response size before operation */
1237 nfsd4op_rsize op_rsize_bop
;
1238 stateid_getter op_get_currentstateid
;
1239 stateid_setter op_set_currentstateid
;
1242 static struct nfsd4_operation nfsd4_ops
[];
1244 static const char *nfsd4_op_name(unsigned opnum
);
1247 * Enforce NFSv4.1 COMPOUND ordering rules:
1249 * Also note, enforced elsewhere:
1250 * - SEQUENCE other than as first op results in
1251 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1252 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1253 * (Enforced in nfsd4_bind_conn_to_session().)
1254 * - DESTROY_SESSION must be the final operation in a compound, if
1255 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1256 * (Enforced in nfsd4_destroy_session().)
1258 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1260 struct nfsd4_op
*op
= &args
->ops
[0];
1262 /* These ordering requirements don't apply to NFSv4.0: */
1263 if (args
->minorversion
== 0)
1265 /* This is weird, but OK, not our problem: */
1266 if (args
->opcnt
== 0)
1268 if (op
->status
== nfserr_op_illegal
)
1270 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1271 return nfserr_op_not_in_session
;
1272 if (op
->opnum
== OP_SEQUENCE
)
1274 if (args
->opcnt
!= 1)
1275 return nfserr_not_only_op
;
1279 static inline struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1281 return &nfsd4_ops
[op
->opnum
];
1284 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1286 if (op
->opnum
== OP_ILLEGAL
)
1288 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1291 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1293 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1294 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1295 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1296 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1297 struct nfsd4_operation
*thisd
;
1298 struct nfsd4_operation
*nextd
;
1300 thisd
= OPDESC(this);
1302 * Most ops check wronsec on our own; only the putfh-like ops
1303 * have special rules.
1305 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1308 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1309 * put-filehandle operation if we're not going to use the
1312 if (argp
->opcnt
== resp
->opcnt
)
1314 if (next
->opnum
== OP_ILLEGAL
)
1316 nextd
= OPDESC(next
);
1318 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1319 * errors themselves as necessary; others should check for them
1322 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1325 static void svcxdr_init_encode(struct svc_rqst
*rqstp
,
1326 struct nfsd4_compoundres
*resp
)
1328 struct xdr_stream
*xdr
= &resp
->xdr
;
1329 struct xdr_buf
*buf
= &rqstp
->rq_res
;
1330 struct kvec
*head
= buf
->head
;
1334 xdr
->p
= head
->iov_base
+ head
->iov_len
;
1335 xdr
->end
= head
->iov_base
+ PAGE_SIZE
- rqstp
->rq_auth_slack
;
1336 /* Tail and page_len should be zero at this point: */
1337 buf
->len
= buf
->head
[0].iov_len
;
1338 xdr
->scratch
.iov_len
= 0;
1339 xdr
->page_ptr
= buf
->pages
- 1;
1340 buf
->buflen
= PAGE_SIZE
* (1 + rqstp
->rq_page_end
- buf
->pages
)
1341 - rqstp
->rq_auth_slack
;
1348 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1349 struct nfsd4_compoundargs
*args
,
1350 struct nfsd4_compoundres
*resp
)
1352 struct nfsd4_op
*op
;
1353 struct nfsd4_operation
*opdesc
;
1354 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1355 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1356 struct svc_fh
*save_fh
= &cstate
->save_fh
;
1359 svcxdr_init_encode(rqstp
, resp
);
1360 resp
->tagp
= resp
->xdr
.p
;
1361 /* reserve space for: taglen, tag, and opcnt */
1362 xdr_reserve_space(&resp
->xdr
, 8 + args
->taglen
);
1363 resp
->taglen
= args
->taglen
;
1364 resp
->tag
= args
->tag
;
1365 resp
->rqstp
= rqstp
;
1366 cstate
->minorversion
= args
->minorversion
;
1367 fh_init(current_fh
, NFS4_FHSIZE
);
1368 fh_init(save_fh
, NFS4_FHSIZE
);
1370 * Don't use the deferral mechanism for NFSv4; compounds make it
1371 * too hard to avoid non-idempotency problems.
1373 clear_bit(RQ_USEDEFERRAL
, &rqstp
->rq_flags
);
1376 * According to RFC3010, this takes precedence over all other errors.
1378 status
= nfserr_minor_vers_mismatch
;
1379 if (nfsd_minorversion(args
->minorversion
, NFSD_TEST
) <= 0)
1382 status
= nfs41_check_op_ordering(args
);
1385 op
->status
= status
;
1389 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1390 op
= &args
->ops
[resp
->opcnt
++];
1392 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1393 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1394 nfsd4_op_name(op
->opnum
));
1396 * The XDR decode routines may have pre-set op->status;
1397 * for example, if there is a miscellaneous XDR error
1398 * it will be set to nfserr_bad_xdr.
1401 if (op
->opnum
== OP_OPEN
)
1402 op
->status
= nfsd4_open_omfg(rqstp
, cstate
, op
);
1406 opdesc
= OPDESC(op
);
1408 if (!current_fh
->fh_dentry
) {
1409 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1410 op
->status
= nfserr_nofilehandle
;
1413 } else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
1414 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1415 op
->status
= nfserr_moved
;
1419 fh_clear_wcc(current_fh
);
1421 /* If op is non-idempotent */
1422 if (opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1424 * Don't execute this op if we couldn't encode a
1427 u32 plen
= opdesc
->op_rsize_bop(rqstp
, op
);
1429 * Plus if there's another operation, make sure
1430 * we'll have space to at least encode an error:
1432 if (resp
->opcnt
< args
->opcnt
)
1433 plen
+= COMPOUND_ERR_SLACK_SPACE
;
1434 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1440 if (opdesc
->op_get_currentstateid
)
1441 opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1442 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1445 if (opdesc
->op_set_currentstateid
)
1446 opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1448 if (opdesc
->op_flags
& OP_CLEAR_STATEID
)
1449 clear_current_stateid(cstate
);
1451 if (need_wrongsec_check(rqstp
))
1452 op
->status
= check_nfsd_access(current_fh
->fh_export
, rqstp
);
1456 /* Only from SEQUENCE */
1457 if (cstate
->status
== nfserr_replay_cache
) {
1458 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1459 status
= op
->status
;
1462 if (op
->status
== nfserr_replay_me
) {
1463 op
->replay
= &cstate
->replay_owner
->so_replay
;
1464 nfsd4_encode_replay(&resp
->xdr
, op
);
1465 status
= op
->status
= op
->replay
->rp_status
;
1467 nfsd4_encode_operation(resp
, op
);
1468 status
= op
->status
;
1471 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1472 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1473 be32_to_cpu(status
));
1475 nfsd4_cstate_clear_replay(cstate
);
1476 /* XXX Ugh, we need to get rid of this kind of special case: */
1477 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1478 fput(op
->u
.read
.rd_filp
);
1480 nfsd4_increment_op_stats(op
->opnum
);
1483 cstate
->status
= status
;
1486 BUG_ON(cstate
->replay_owner
);
1488 /* Reset deferral mechanism for RPC deferrals */
1489 set_bit(RQ_USEDEFERRAL
, &rqstp
->rq_flags
);
1490 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1494 #define op_encode_hdr_size (2)
1495 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1496 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1497 #define op_encode_change_info_maxsz (5)
1498 #define nfs4_fattr_bitmap_maxsz (4)
1500 /* We'll fall back on returning no lockowner if run out of space: */
1501 #define op_encode_lockowner_maxsz (0)
1502 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1504 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1506 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1507 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1508 op_encode_ace_maxsz)
1510 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1512 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1514 return (op_encode_hdr_size
) * sizeof(__be32
);
1517 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1519 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1522 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1524 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1527 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1529 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1530 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1534 * Note since this is an idempotent operation we won't insist on failing
1535 * the op prematurely if the estimate is too large. We may turn off splice
1536 * reads unnecessarily.
1538 static inline u32
nfsd4_getattr_rsize(struct svc_rqst
*rqstp
,
1539 struct nfsd4_op
*op
)
1541 u32
*bmap
= op
->u
.getattr
.ga_bmval
;
1542 u32 bmap0
= bmap
[0], bmap1
= bmap
[1], bmap2
= bmap
[2];
1545 if (bmap0
& FATTR4_WORD0_ACL
)
1546 return svc_max_payload(rqstp
);
1547 if (bmap0
& FATTR4_WORD0_FS_LOCATIONS
)
1548 return svc_max_payload(rqstp
);
1550 if (bmap1
& FATTR4_WORD1_OWNER
) {
1551 ret
+= IDMAP_NAMESZ
+ 4;
1552 bmap1
&= ~FATTR4_WORD1_OWNER
;
1554 if (bmap1
& FATTR4_WORD1_OWNER_GROUP
) {
1555 ret
+= IDMAP_NAMESZ
+ 4;
1556 bmap1
&= ~FATTR4_WORD1_OWNER_GROUP
;
1558 if (bmap0
& FATTR4_WORD0_FILEHANDLE
) {
1559 ret
+= NFS4_FHSIZE
+ 4;
1560 bmap0
&= ~FATTR4_WORD0_FILEHANDLE
;
1562 if (bmap2
& FATTR4_WORD2_SECURITY_LABEL
) {
1563 ret
+= NFSD4_MAX_SEC_LABEL_LEN
+ 12;
1564 bmap2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
1567 * Largest of remaining attributes are 16 bytes (e.g.,
1568 * supported_attributes)
1570 ret
+= 16 * (hweight32(bmap0
) + hweight32(bmap1
) + hweight32(bmap2
));
1571 /* bitmask, length */
1576 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1578 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1582 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1584 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1588 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1590 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1591 + op_encode_change_info_maxsz
+ 1
1592 + nfs4_fattr_bitmap_maxsz
1593 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1596 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1598 u32 maxcount
= 0, rlen
= 0;
1600 maxcount
= svc_max_payload(rqstp
);
1601 rlen
= min(op
->u
.read
.rd_length
, maxcount
);
1603 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1606 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1608 u32 maxcount
= 0, rlen
= 0;
1610 maxcount
= svc_max_payload(rqstp
);
1611 rlen
= min(op
->u
.readdir
.rd_maxcount
, maxcount
);
1613 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
+
1614 XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1617 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1619 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1623 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1625 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1626 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1629 static inline u32
nfsd4_sequence_rsize(struct svc_rqst
*rqstp
,
1630 struct nfsd4_op
*op
)
1632 return (op_encode_hdr_size
1633 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + 5) * sizeof(__be32
);
1636 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1638 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1641 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1643 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE
)) *
1647 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1649 return (op_encode_hdr_size
+ 2 + op_encode_verifier_maxsz
) * sizeof(__be32
);
1652 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1654 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
1655 1 + 1 + /* eir_flags, spr_how */\
1656 4 + /* spo_must_enforce & _allow with bitmap */\
1657 2 + /*eir_server_owner.so_minor_id */\
1658 /* eir_server_owner.so_major_id<> */\
1659 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1660 /* eir_server_scope<> */\
1661 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1662 1 + /* eir_server_impl_id array length */\
1663 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
1666 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1668 return (op_encode_hdr_size
+ \
1669 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
1670 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
1673 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1675 return (op_encode_hdr_size
+ \
1676 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
1677 2 + /* csr_sequence, csr_flags */\
1678 op_encode_channel_attrs_maxsz
+ \
1679 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
1682 static struct nfsd4_operation nfsd4_ops
[] = {
1684 .op_func
= (nfsd4op_func
)nfsd4_access
,
1685 .op_name
= "OP_ACCESS",
1688 .op_func
= (nfsd4op_func
)nfsd4_close
,
1689 .op_flags
= OP_MODIFIES_SOMETHING
,
1690 .op_name
= "OP_CLOSE",
1691 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1692 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_closestateid
,
1693 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_closestateid
,
1696 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1697 .op_flags
= OP_MODIFIES_SOMETHING
,
1698 .op_name
= "OP_COMMIT",
1699 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_commit_rsize
,
1702 .op_func
= (nfsd4op_func
)nfsd4_create
,
1703 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
1704 .op_name
= "OP_CREATE",
1705 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_rsize
,
1707 [OP_DELEGRETURN
] = {
1708 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1709 .op_flags
= OP_MODIFIES_SOMETHING
,
1710 .op_name
= "OP_DELEGRETURN",
1711 .op_rsize_bop
= nfsd4_only_status_rsize
,
1712 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_delegreturnstateid
,
1715 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1716 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1717 .op_rsize_bop
= nfsd4_getattr_rsize
,
1718 .op_name
= "OP_GETATTR",
1721 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1722 .op_name
= "OP_GETFH",
1725 .op_func
= (nfsd4op_func
)nfsd4_link
,
1726 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
1728 .op_name
= "OP_LINK",
1729 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_link_rsize
,
1732 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1733 .op_flags
= OP_MODIFIES_SOMETHING
,
1734 .op_name
= "OP_LOCK",
1735 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_lock_rsize
,
1736 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_lockstateid
,
1739 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1740 .op_name
= "OP_LOCKT",
1743 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1744 .op_flags
= OP_MODIFIES_SOMETHING
,
1745 .op_name
= "OP_LOCKU",
1746 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1747 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_lockustateid
,
1750 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1751 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1752 .op_name
= "OP_LOOKUP",
1755 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1756 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1757 .op_name
= "OP_LOOKUPP",
1760 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1761 .op_name
= "OP_NVERIFY",
1764 .op_func
= (nfsd4op_func
)nfsd4_open
,
1765 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1766 .op_name
= "OP_OPEN",
1767 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_open_rsize
,
1768 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_openstateid
,
1770 [OP_OPEN_CONFIRM
] = {
1771 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1772 .op_flags
= OP_MODIFIES_SOMETHING
,
1773 .op_name
= "OP_OPEN_CONFIRM",
1774 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1776 [OP_OPEN_DOWNGRADE
] = {
1777 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1778 .op_flags
= OP_MODIFIES_SOMETHING
,
1779 .op_name
= "OP_OPEN_DOWNGRADE",
1780 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1781 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_opendowngradestateid
,
1782 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_opendowngradestateid
,
1785 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1786 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1787 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1788 .op_name
= "OP_PUTFH",
1789 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1792 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1793 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1794 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1795 .op_name
= "OP_PUTPUBFH",
1796 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1799 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1800 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1801 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
1802 .op_name
= "OP_PUTROOTFH",
1803 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1806 .op_func
= (nfsd4op_func
)nfsd4_read
,
1807 .op_name
= "OP_READ",
1808 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_read_rsize
,
1809 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_readstateid
,
1812 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1813 .op_name
= "OP_READDIR",
1814 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_readdir_rsize
,
1817 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1818 .op_name
= "OP_READLINK",
1821 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1822 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1823 .op_name
= "OP_REMOVE",
1824 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_remove_rsize
,
1827 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1828 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1829 .op_name
= "OP_RENAME",
1830 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_rename_rsize
,
1833 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1834 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1835 | OP_MODIFIES_SOMETHING
,
1836 .op_name
= "OP_RENEW",
1837 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1841 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1842 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1843 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
1844 .op_name
= "OP_RESTOREFH",
1845 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1848 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1849 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1850 .op_name
= "OP_SAVEFH",
1851 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1854 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1855 .op_flags
= OP_HANDLES_WRONGSEC
,
1856 .op_name
= "OP_SECINFO",
1859 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1860 .op_name
= "OP_SETATTR",
1861 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1862 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setattr_rsize
,
1863 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_setattrstateid
,
1865 [OP_SETCLIENTID
] = {
1866 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1867 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1868 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1869 .op_name
= "OP_SETCLIENTID",
1870 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setclientid_rsize
,
1872 [OP_SETCLIENTID_CONFIRM
] = {
1873 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1874 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1875 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1876 .op_name
= "OP_SETCLIENTID_CONFIRM",
1877 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1880 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1881 .op_name
= "OP_VERIFY",
1884 .op_func
= (nfsd4op_func
)nfsd4_write
,
1885 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1886 .op_name
= "OP_WRITE",
1887 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1888 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_writestateid
,
1890 [OP_RELEASE_LOCKOWNER
] = {
1891 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1892 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1893 | OP_MODIFIES_SOMETHING
,
1894 .op_name
= "OP_RELEASE_LOCKOWNER",
1895 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1898 /* NFSv4.1 operations */
1899 [OP_EXCHANGE_ID
] = {
1900 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1901 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1902 | OP_MODIFIES_SOMETHING
,
1903 .op_name
= "OP_EXCHANGE_ID",
1904 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_exchange_id_rsize
,
1906 [OP_BACKCHANNEL_CTL
] = {
1907 .op_func
= (nfsd4op_func
)nfsd4_backchannel_ctl
,
1908 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1909 .op_name
= "OP_BACKCHANNEL_CTL",
1910 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1912 [OP_BIND_CONN_TO_SESSION
] = {
1913 .op_func
= (nfsd4op_func
)nfsd4_bind_conn_to_session
,
1914 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1915 | OP_MODIFIES_SOMETHING
,
1916 .op_name
= "OP_BIND_CONN_TO_SESSION",
1917 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_bind_conn_to_session_rsize
,
1919 [OP_CREATE_SESSION
] = {
1920 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1921 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1922 | OP_MODIFIES_SOMETHING
,
1923 .op_name
= "OP_CREATE_SESSION",
1924 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_session_rsize
,
1926 [OP_DESTROY_SESSION
] = {
1927 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1928 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1929 | OP_MODIFIES_SOMETHING
,
1930 .op_name
= "OP_DESTROY_SESSION",
1931 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1934 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1935 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1936 .op_name
= "OP_SEQUENCE",
1937 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_sequence_rsize
,
1939 [OP_DESTROY_CLIENTID
] = {
1940 .op_func
= (nfsd4op_func
)nfsd4_destroy_clientid
,
1941 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1942 | OP_MODIFIES_SOMETHING
,
1943 .op_name
= "OP_DESTROY_CLIENTID",
1944 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1946 [OP_RECLAIM_COMPLETE
] = {
1947 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1948 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1949 .op_name
= "OP_RECLAIM_COMPLETE",
1950 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1952 [OP_SECINFO_NO_NAME
] = {
1953 .op_func
= (nfsd4op_func
)nfsd4_secinfo_no_name
,
1954 .op_flags
= OP_HANDLES_WRONGSEC
,
1955 .op_name
= "OP_SECINFO_NO_NAME",
1957 [OP_TEST_STATEID
] = {
1958 .op_func
= (nfsd4op_func
)nfsd4_test_stateid
,
1959 .op_flags
= ALLOWED_WITHOUT_FH
,
1960 .op_name
= "OP_TEST_STATEID",
1962 [OP_FREE_STATEID
] = {
1963 .op_func
= (nfsd4op_func
)nfsd4_free_stateid
,
1964 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1965 .op_name
= "OP_FREE_STATEID",
1966 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_freestateid
,
1967 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1970 /* NFSv4.2 operations */
1972 .op_func
= (nfsd4op_func
)nfsd4_allocate
,
1973 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1974 .op_name
= "OP_ALLOCATE",
1975 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1978 .op_func
= (nfsd4op_func
)nfsd4_deallocate
,
1979 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1980 .op_name
= "OP_DEALLOCATE",
1981 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1984 .op_func
= (nfsd4op_func
)nfsd4_seek
,
1985 .op_name
= "OP_SEEK",
1989 int nfsd4_max_reply(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1991 struct nfsd4_operation
*opdesc
;
1992 nfsd4op_rsize estimator
;
1994 if (op
->opnum
== OP_ILLEGAL
)
1995 return op_encode_hdr_size
* sizeof(__be32
);
1996 opdesc
= OPDESC(op
);
1997 estimator
= opdesc
->op_rsize_bop
;
1998 return estimator
? estimator(rqstp
, op
) : PAGE_SIZE
;
2001 void warn_on_nonidempotent_op(struct nfsd4_op
*op
)
2003 if (OPDESC(op
)->op_flags
& OP_MODIFIES_SOMETHING
) {
2004 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2005 op
->opnum
, nfsd4_op_name(op
->opnum
));
2010 static const char *nfsd4_op_name(unsigned opnum
)
2012 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
2013 return nfsd4_ops
[opnum
].op_name
;
2014 return "unknown_operation";
2017 #define nfsd4_voidres nfsd4_voidargs
2018 struct nfsd4_voidargs
{ int dummy
; };
2020 static struct svc_procedure nfsd_procedures4
[2] = {
2022 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
2023 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
2024 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
2025 .pc_ressize
= sizeof(struct nfsd4_voidres
),
2026 .pc_cachetype
= RC_NOCACHE
,
2029 [NFSPROC4_COMPOUND
] = {
2030 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
2031 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
2032 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
2033 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
2034 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
2035 .pc_release
= nfsd4_release_compoundargs
,
2036 .pc_cachetype
= RC_NOCACHE
,
2037 .pc_xdrressize
= NFSD_BUFSIZE
/4,
2041 struct svc_version nfsd_version4
= {
2044 .vs_proc
= nfsd_procedures4
,
2045 .vs_dispatch
= nfsd_dispatch
,
2046 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,