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"
49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50 #include <linux/security.h>
53 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
55 struct inode
*inode
= d_inode(resfh
->fh_dentry
);
59 status
= security_inode_setsecctx(resfh
->fh_dentry
,
60 label
->data
, label
->len
);
65 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
69 bmval
[2] &= ~FATTR4_WORD2_SECURITY_LABEL
;
75 nfsd4_security_inode_setsecctx(struct svc_fh
*resfh
, struct xdr_netobj
*label
, u32
*bmval
)
79 #define NFSDDBG_FACILITY NFSDDBG_PROC
81 static u32 nfsd_attrmask
[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0
,
83 NFSD_WRITEABLE_ATTRS_WORD1
,
84 NFSD_WRITEABLE_ATTRS_WORD2
87 static u32 nfsd41_ex_attrmask
[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0
,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1
,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
94 check_attr_support(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
95 u32
*bmval
, u32
*writable
)
97 struct dentry
*dentry
= cstate
->current_fh
.fh_dentry
;
98 struct svc_export
*exp
= cstate
->current_fh
.fh_export
;
100 if (!nfsd_attrs_supported(cstate
->minorversion
, bmval
))
101 return nfserr_attrnotsupp
;
102 if ((bmval
[0] & FATTR4_WORD0_ACL
) && !IS_POSIXACL(d_inode(dentry
)))
103 return nfserr_attrnotsupp
;
104 if ((bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) &&
105 !(exp
->ex_flags
& NFSEXP_SECURITY_LABEL
))
106 return nfserr_attrnotsupp
;
107 if (writable
&& !bmval_is_subset(bmval
, writable
))
109 if (writable
&& (bmval
[2] & FATTR4_WORD2_MODE_UMASK
) &&
110 (bmval
[1] & FATTR4_WORD1_MODE
))
116 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
117 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
119 __be32 status
= nfs_ok
;
121 if (open
->op_create
== NFS4_OPEN_CREATE
) {
122 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
123 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
124 status
= check_attr_support(rqstp
, cstate
,
125 open
->op_bmval
, nfsd_attrmask
);
126 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
127 status
= check_attr_support(rqstp
, cstate
,
128 open
->op_bmval
, nfsd41_ex_attrmask
);
135 is_create_with_attrs(struct nfsd4_open
*open
)
137 return open
->op_create
== NFS4_OPEN_CREATE
138 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
139 || open
->op_createmode
== NFS4_CREATE_GUARDED
140 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
144 * if error occurs when setting the acl, just clear the acl bit
145 * in the returned attr bitmap.
148 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
149 struct nfs4_acl
*acl
, u32
*bmval
)
153 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
156 * We should probably fail the whole open at this point,
157 * but we've already created the file, so it's too late;
158 * So this seems the least of evils:
160 bmval
[0] &= ~FATTR4_WORD0_ACL
;
164 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
167 dget(src
->fh_dentry
);
169 exp_get(src
->fh_export
);
174 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
178 if (open
->op_truncate
&&
179 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
182 accmode
|= NFSD_MAY_READ_IF_EXEC
;
184 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
185 accmode
|= NFSD_MAY_READ
;
186 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
187 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
188 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
189 accmode
|= NFSD_MAY_WRITE
;
191 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
196 static __be32
nfsd_check_obj_isreg(struct svc_fh
*fh
)
198 umode_t mode
= d_inode(fh
->fh_dentry
)->i_mode
;
205 * Using err_symlink as our catch-all case may look odd; but
206 * there's no other obvious error for this case in 4.0, and we
207 * happen to know that it will cause the linux v4 client to do
208 * the right thing on attempts to open something other than a
211 return nfserr_symlink
;
214 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
*resfh
)
216 if (nfsd4_has_session(cstate
))
218 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
223 do_open_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
**resfh
)
225 struct svc_fh
*current_fh
= &cstate
->current_fh
;
229 *resfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
231 return nfserr_jukebox
;
232 fh_init(*resfh
, NFS4_FHSIZE
);
233 open
->op_truncate
= 0;
235 if (open
->op_create
) {
236 /* FIXME: check session persistence and pnfs flags.
237 * The nfsv4.1 spec requires the following semantics:
239 * Persistent | pNFS | Server REQUIRED | Client Allowed
240 * Reply Cache | server | |
241 * -------------+--------+-----------------+--------------------
242 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
244 * | | and EXCLUSIVE4 | or EXCLUSIVE4
246 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
247 * yes | no | GUARDED4 | GUARDED4
248 * yes | yes | GUARDED4 | GUARDED4
252 * Note: create modes (UNCHECKED,GUARDED...) are the same
253 * in NFSv4 as in v3 except EXCLUSIVE4_1.
255 status
= do_nfsd_create(rqstp
, current_fh
, open
->op_fname
.data
,
256 open
->op_fname
.len
, &open
->op_iattr
,
257 *resfh
, open
->op_createmode
,
258 (u32
*)open
->op_verf
.data
,
259 &open
->op_truncate
, &open
->op_created
);
261 if (!status
&& open
->op_label
.len
)
262 nfsd4_security_inode_setsecctx(*resfh
, &open
->op_label
, open
->op_bmval
);
265 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
266 * use the returned bitmask to indicate which attributes
267 * we used to store the verifier:
269 if (nfsd_create_is_exclusive(open
->op_createmode
) && status
== 0)
270 open
->op_bmval
[1] |= (FATTR4_WORD1_TIME_ACCESS
|
271 FATTR4_WORD1_TIME_MODIFY
);
274 * Note this may exit with the parent still locked.
275 * We will hold the lock until nfsd4_open's final
276 * lookup, to prevent renames or unlinks until we've had
277 * a chance to an acquire a delegation if appropriate.
279 status
= nfsd_lookup(rqstp
, current_fh
,
280 open
->op_fname
.data
, open
->op_fname
.len
, *resfh
);
283 status
= nfsd_check_obj_isreg(*resfh
);
287 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
288 do_set_nfs4_acl(rqstp
, *resfh
, open
->op_acl
, open
->op_bmval
);
290 nfsd4_set_open_owner_reply_cache(cstate
, open
, *resfh
);
291 accmode
= NFSD_MAY_NOP
;
292 if (open
->op_created
||
293 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
294 accmode
|= NFSD_MAY_OWNER_OVERRIDE
;
295 status
= do_open_permission(rqstp
, *resfh
, open
, accmode
);
296 set_change_info(&open
->op_cinfo
, current_fh
);
302 do_open_fhandle(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
304 struct svc_fh
*current_fh
= &cstate
->current_fh
;
308 /* We don't know the target directory, and therefore can not
309 * set the change info
312 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
314 nfsd4_set_open_owner_reply_cache(cstate
, open
, current_fh
);
316 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
317 (open
->op_iattr
.ia_size
== 0);
319 * In the delegation case, the client is telling us about an
320 * open that it *already* performed locally, some time ago. We
321 * should let it succeed now if possible.
323 * In the case of a CLAIM_FH open, on the other hand, the client
324 * may be counting on us to enforce permissions (the Linux 4.1
325 * client uses this for normal opens, for example).
327 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
)
328 accmode
= NFSD_MAY_OWNER_OVERRIDE
;
330 status
= do_open_permission(rqstp
, current_fh
, open
, accmode
);
336 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
338 struct nfsd4_sessionid
*sid
=
339 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
341 clid
->cl_boot
= sid
->clientid
.cl_boot
;
342 clid
->cl_id
= sid
->clientid
.cl_id
;
346 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
349 struct nfsd4_open
*open
= &u
->open
;
351 struct svc_fh
*resfh
= NULL
;
352 struct net
*net
= SVC_NET(rqstp
);
353 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
355 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
356 (int)open
->op_fname
.len
, open
->op_fname
.data
,
359 /* This check required by spec. */
360 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
363 open
->op_created
= 0;
366 * Before RECLAIM_COMPLETE done, server should deny new lock
368 if (nfsd4_has_session(cstate
) &&
369 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
370 &cstate
->session
->se_client
->cl_flags
) &&
371 open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
374 if (nfsd4_has_session(cstate
))
375 copy_clientid(&open
->op_clientid
, cstate
->session
);
377 /* check seqid for replay. set nfs4_owner */
378 status
= nfsd4_process_open1(cstate
, open
, nn
);
379 if (status
== nfserr_replay_me
) {
380 struct nfs4_replay
*rp
= &open
->op_openowner
->oo_owner
.so_replay
;
381 fh_put(&cstate
->current_fh
);
382 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
384 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
386 dprintk("nfsd4_open: replay failed"
387 " restoring previous filehandle\n");
389 status
= nfserr_replay_me
;
393 if (open
->op_xdr_error
) {
394 status
= open
->op_xdr_error
;
398 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
402 /* Openowner is now set, so sequence id will get bumped. Now we need
403 * these checks before we do any creates: */
404 status
= nfserr_grace
;
405 if (opens_in_grace(net
) && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
407 status
= nfserr_no_grace
;
408 if (!opens_in_grace(net
) && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
411 switch (open
->op_claim_type
) {
412 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
413 case NFS4_OPEN_CLAIM_NULL
:
414 status
= do_open_lookup(rqstp
, cstate
, open
, &resfh
);
418 case NFS4_OPEN_CLAIM_PREVIOUS
:
419 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
423 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
424 case NFS4_OPEN_CLAIM_FH
:
425 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
426 status
= do_open_fhandle(rqstp
, cstate
, open
);
429 resfh
= &cstate
->current_fh
;
431 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
432 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
433 dprintk("NFSD: unsupported OPEN claim type %d\n",
434 open
->op_claim_type
);
435 status
= nfserr_notsupp
;
438 dprintk("NFSD: Invalid OPEN claim type %d\n",
439 open
->op_claim_type
);
440 status
= nfserr_inval
;
444 * nfsd4_process_open2() does the actual opening of the file. If
445 * successful, it (1) truncates the file if open->op_truncate was
446 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
448 status
= nfsd4_process_open2(rqstp
, resfh
, open
);
449 WARN(status
&& open
->op_created
,
450 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
451 be32_to_cpu(status
));
453 if (resfh
&& resfh
!= &cstate
->current_fh
) {
454 fh_dup2(&cstate
->current_fh
, resfh
);
458 nfsd4_cleanup_open_state(cstate
, open
);
459 nfsd4_bump_seqid(cstate
, status
);
464 * OPEN is the only seqid-mutating operation whose decoding can fail
465 * with a seqid-mutating error (specifically, decoding of user names in
466 * the attributes). Therefore we have to do some processing to look up
467 * the stateowner so that we can bump the seqid.
469 static __be32
nfsd4_open_omfg(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_op
*op
)
471 struct nfsd4_open
*open
= &op
->u
.open
;
473 if (!seqid_mutating_err(ntohl(op
->status
)))
475 if (nfsd4_has_session(cstate
))
477 open
->op_xdr_error
= op
->status
;
478 return nfsd4_open(rqstp
, cstate
, &op
->u
);
482 * filehandle-manipulating ops.
485 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
488 if (!cstate
->current_fh
.fh_dentry
)
489 return nfserr_nofilehandle
;
491 u
->getfh
= &cstate
->current_fh
;
496 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
499 struct nfsd4_putfh
*putfh
= &u
->putfh
;
501 fh_put(&cstate
->current_fh
);
502 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
503 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
505 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
509 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
514 fh_put(&cstate
->current_fh
);
515 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
520 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
523 if (!cstate
->save_fh
.fh_dentry
)
524 return nfserr_restorefh
;
526 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
527 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
528 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
529 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
535 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
538 if (!cstate
->current_fh
.fh_dentry
)
539 return nfserr_nofilehandle
;
541 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
542 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
543 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
544 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
553 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
556 struct nfsd4_access
*access
= &u
->access
;
558 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
561 access
->ac_resp_access
= access
->ac_req_access
;
562 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
563 &access
->ac_supported
);
566 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
569 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
572 * This is opaque to client, so no need to byte-swap. Use
573 * __force to keep sparse happy
575 verf
[0] = (__force __be32
)nn
->nfssvc_boot
.tv_sec
;
576 verf
[1] = (__force __be32
)nn
->nfssvc_boot
.tv_usec
;
577 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
581 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
584 struct nfsd4_commit
*commit
= &u
->commit
;
586 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
587 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
592 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
595 struct nfsd4_create
*create
= &u
->create
;
600 fh_init(&resfh
, NFS4_FHSIZE
);
602 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_NOP
);
606 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
611 switch (create
->cr_type
) {
613 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
614 create
->cr_name
, create
->cr_namelen
,
615 create
->cr_data
, &resfh
);
619 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
620 if (MAJOR(rdev
) != create
->cr_specdata1
||
621 MINOR(rdev
) != create
->cr_specdata2
)
623 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
624 create
->cr_name
, create
->cr_namelen
,
625 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
629 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
630 if (MAJOR(rdev
) != create
->cr_specdata1
||
631 MINOR(rdev
) != create
->cr_specdata2
)
633 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
634 create
->cr_name
, create
->cr_namelen
,
635 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
639 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
640 create
->cr_name
, create
->cr_namelen
,
641 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
645 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
646 create
->cr_name
, create
->cr_namelen
,
647 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
651 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
652 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
653 create
->cr_name
, create
->cr_namelen
,
654 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
658 status
= nfserr_badtype
;
664 if (create
->cr_label
.len
)
665 nfsd4_security_inode_setsecctx(&resfh
, &create
->cr_label
, create
->cr_bmval
);
667 if (create
->cr_acl
!= NULL
)
668 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
671 fh_unlock(&cstate
->current_fh
);
672 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
673 fh_dup2(&cstate
->current_fh
, &resfh
);
680 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
683 struct nfsd4_getattr
*getattr
= &u
->getattr
;
686 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
690 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
693 getattr
->ga_bmval
[0] &= nfsd_suppattrs
[cstate
->minorversion
][0];
694 getattr
->ga_bmval
[1] &= nfsd_suppattrs
[cstate
->minorversion
][1];
695 getattr
->ga_bmval
[2] &= nfsd_suppattrs
[cstate
->minorversion
][2];
697 getattr
->ga_fhp
= &cstate
->current_fh
;
702 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
705 struct nfsd4_link
*link
= &u
->link
;
706 __be32 status
= nfserr_nofilehandle
;
708 if (!cstate
->save_fh
.fh_dentry
)
710 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
711 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
713 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
717 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
719 struct svc_fh tmp_fh
;
722 fh_init(&tmp_fh
, NFS4_FHSIZE
);
723 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
726 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
731 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
735 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
738 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
742 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
745 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
746 u
->lookup
.lo_name
, u
->lookup
.lo_len
,
747 &cstate
->current_fh
);
751 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
754 struct nfsd4_read
*read
= &u
->read
;
757 read
->rd_filp
= NULL
;
758 if (read
->rd_offset
>= OFFSET_MAX
)
762 * If we do a zero copy read, then a client will see read data
763 * that reflects the state of the file *after* performing the
764 * following compound.
766 * To ensure proper ordering, we therefore turn off zero copy if
767 * the client wants us to do more in this compound:
769 if (!nfsd4_last_compound_op(rqstp
))
770 clear_bit(RQ_SPLICE_OK
, &rqstp
->rq_flags
);
773 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &cstate
->current_fh
,
774 &read
->rd_stateid
, RD_STATE
,
775 &read
->rd_filp
, &read
->rd_tmp_file
);
777 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
782 read
->rd_rqstp
= rqstp
;
783 read
->rd_fhp
= &cstate
->current_fh
;
789 nfsd4_read_release(union nfsd4_op_u
*u
)
792 fput(u
->read
.rd_filp
);
796 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
799 struct nfsd4_readdir
*readdir
= &u
->readdir
;
800 u64 cookie
= readdir
->rd_cookie
;
801 static const nfs4_verifier zeroverf
;
803 /* no need to check permission - this will be done in nfsd_readdir() */
805 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
808 readdir
->rd_bmval
[0] &= nfsd_suppattrs
[cstate
->minorversion
][0];
809 readdir
->rd_bmval
[1] &= nfsd_suppattrs
[cstate
->minorversion
][1];
810 readdir
->rd_bmval
[2] &= nfsd_suppattrs
[cstate
->minorversion
][2];
812 if ((cookie
== 1) || (cookie
== 2) ||
813 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
814 return nfserr_bad_cookie
;
816 readdir
->rd_rqstp
= rqstp
;
817 readdir
->rd_fhp
= &cstate
->current_fh
;
822 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
825 u
->readlink
.rl_rqstp
= rqstp
;
826 u
->readlink
.rl_fhp
= &cstate
->current_fh
;
831 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
834 struct nfsd4_remove
*remove
= &u
->remove
;
837 if (opens_in_grace(SVC_NET(rqstp
)))
839 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
840 remove
->rm_name
, remove
->rm_namelen
);
842 fh_unlock(&cstate
->current_fh
);
843 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
849 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
852 struct nfsd4_rename
*rename
= &u
->rename
;
853 __be32 status
= nfserr_nofilehandle
;
855 if (!cstate
->save_fh
.fh_dentry
)
857 if (opens_in_grace(SVC_NET(rqstp
)) &&
858 !(cstate
->save_fh
.fh_export
->ex_flags
& NFSEXP_NOSUBTREECHECK
))
860 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
861 rename
->rn_snamelen
, &cstate
->current_fh
,
862 rename
->rn_tname
, rename
->rn_tnamelen
);
865 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
866 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
871 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
874 struct nfsd4_secinfo
*secinfo
= &u
->secinfo
;
875 struct svc_export
*exp
;
876 struct dentry
*dentry
;
879 err
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_EXEC
);
882 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
883 secinfo
->si_name
, secinfo
->si_namelen
,
887 fh_unlock(&cstate
->current_fh
);
888 if (d_really_is_negative(dentry
)) {
892 secinfo
->si_exp
= exp
;
894 if (cstate
->minorversion
)
895 /* See rfc 5661 section 2.6.3.1.1.8 */
896 fh_put(&cstate
->current_fh
);
901 nfsd4_secinfo_no_name(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
906 switch (u
->secinfo_no_name
.sin_style
) {
907 case NFS4_SECINFO_STYLE4_CURRENT_FH
:
909 case NFS4_SECINFO_STYLE4_PARENT
:
910 err
= nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
918 u
->secinfo_no_name
.sin_exp
= exp_get(cstate
->current_fh
.fh_export
);
919 fh_put(&cstate
->current_fh
);
924 nfsd4_secinfo_release(union nfsd4_op_u
*u
)
926 if (u
->secinfo
.si_exp
)
927 exp_put(u
->secinfo
.si_exp
);
931 nfsd4_secinfo_no_name_release(union nfsd4_op_u
*u
)
933 if (u
->secinfo_no_name
.sin_exp
)
934 exp_put(u
->secinfo_no_name
.sin_exp
);
938 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
941 struct nfsd4_setattr
*setattr
= &u
->setattr
;
942 __be32 status
= nfs_ok
;
945 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
946 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
,
947 &cstate
->current_fh
, &setattr
->sa_stateid
,
948 WR_STATE
, NULL
, NULL
);
950 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
954 err
= fh_want_write(&cstate
->current_fh
);
956 return nfserrno(err
);
959 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
964 if (setattr
->sa_acl
!= NULL
)
965 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
969 if (setattr
->sa_label
.len
)
970 status
= nfsd4_set_nfs4_label(rqstp
, &cstate
->current_fh
,
974 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
977 fh_drop_write(&cstate
->current_fh
);
981 static int fill_in_write_vector(struct kvec
*vec
, struct nfsd4_write
*write
)
984 int buflen
= write
->wr_buflen
;
986 vec
[0].iov_base
= write
->wr_head
.iov_base
;
987 vec
[0].iov_len
= min_t(int, buflen
, write
->wr_head
.iov_len
);
988 buflen
-= vec
[0].iov_len
;
991 vec
[i
].iov_base
= page_address(write
->wr_pagelist
[i
- 1]);
992 vec
[i
].iov_len
= min_t(int, PAGE_SIZE
, buflen
);
993 buflen
-= vec
[i
].iov_len
;
1000 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1001 union nfsd4_op_u
*u
)
1003 struct nfsd4_write
*write
= &u
->write
;
1004 stateid_t
*stateid
= &write
->wr_stateid
;
1005 struct file
*filp
= NULL
;
1006 __be32 status
= nfs_ok
;
1010 if (write
->wr_offset
>= OFFSET_MAX
)
1011 return nfserr_inval
;
1013 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &cstate
->current_fh
,
1014 stateid
, WR_STATE
, &filp
, NULL
);
1016 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1020 cnt
= write
->wr_buflen
;
1021 write
->wr_how_written
= write
->wr_stable_how
;
1022 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
1024 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
1025 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
1027 status
= nfsd_vfs_write(rqstp
, &cstate
->current_fh
, filp
,
1028 write
->wr_offset
, rqstp
->rq_vec
, nvecs
, &cnt
,
1029 write
->wr_how_written
);
1032 write
->wr_bytes_written
= cnt
;
1038 nfsd4_verify_copy(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1039 stateid_t
*src_stateid
, struct file
**src
,
1040 stateid_t
*dst_stateid
, struct file
**dst
)
1044 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &cstate
->save_fh
,
1045 src_stateid
, RD_STATE
, src
, NULL
);
1047 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__
);
1051 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &cstate
->current_fh
,
1052 dst_stateid
, WR_STATE
, dst
, NULL
);
1054 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__
);
1058 /* fix up for NFS-specific error code */
1059 if (!S_ISREG(file_inode(*src
)->i_mode
) ||
1060 !S_ISREG(file_inode(*dst
)->i_mode
)) {
1061 status
= nfserr_wrong_type
;
1075 nfsd4_clone(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1076 union nfsd4_op_u
*u
)
1078 struct nfsd4_clone
*clone
= &u
->clone
;
1079 struct file
*src
, *dst
;
1082 status
= nfsd4_verify_copy(rqstp
, cstate
, &clone
->cl_src_stateid
, &src
,
1083 &clone
->cl_dst_stateid
, &dst
);
1087 status
= nfsd4_clone_file_range(src
, clone
->cl_src_pos
,
1088 dst
, clone
->cl_dst_pos
, clone
->cl_count
);
1097 nfsd4_copy(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1098 union nfsd4_op_u
*u
)
1100 struct nfsd4_copy
*copy
= &u
->copy
;
1101 struct file
*src
, *dst
;
1105 status
= nfsd4_verify_copy(rqstp
, cstate
, ©
->cp_src_stateid
, &src
,
1106 ©
->cp_dst_stateid
, &dst
);
1110 bytes
= nfsd_copy_file_range(src
, copy
->cp_src_pos
,
1111 dst
, copy
->cp_dst_pos
, copy
->cp_count
);
1114 status
= nfserrno(bytes
);
1116 copy
->cp_res
.wr_bytes_written
= bytes
;
1117 copy
->cp_res
.wr_stable_how
= NFS_UNSTABLE
;
1118 copy
->cp_consecutive
= 1;
1119 copy
->cp_synchronous
= 1;
1120 gen_boot_verifier(©
->cp_res
.wr_verifier
, SVC_NET(rqstp
));
1131 nfsd4_fallocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1132 struct nfsd4_fallocate
*fallocate
, int flags
)
1134 __be32 status
= nfserr_notsupp
;
1137 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &cstate
->current_fh
,
1138 &fallocate
->falloc_stateid
,
1139 WR_STATE
, &file
, NULL
);
1140 if (status
!= nfs_ok
) {
1141 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1145 status
= nfsd4_vfs_fallocate(rqstp
, &cstate
->current_fh
, file
,
1146 fallocate
->falloc_offset
,
1147 fallocate
->falloc_length
,
1154 nfsd4_allocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1155 union nfsd4_op_u
*u
)
1157 return nfsd4_fallocate(rqstp
, cstate
, &u
->allocate
, 0);
1161 nfsd4_deallocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1162 union nfsd4_op_u
*u
)
1164 return nfsd4_fallocate(rqstp
, cstate
, &u
->deallocate
,
1165 FALLOC_FL_PUNCH_HOLE
| FALLOC_FL_KEEP_SIZE
);
1169 nfsd4_seek(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1170 union nfsd4_op_u
*u
)
1172 struct nfsd4_seek
*seek
= &u
->seek
;
1177 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &cstate
->current_fh
,
1178 &seek
->seek_stateid
,
1179 RD_STATE
, &file
, NULL
);
1181 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1185 switch (seek
->seek_whence
) {
1186 case NFS4_CONTENT_DATA
:
1189 case NFS4_CONTENT_HOLE
:
1193 status
= nfserr_union_notsupp
;
1198 * Note: This call does change file->f_pos, but nothing in NFSD
1199 * should ever file->f_pos.
1201 seek
->seek_pos
= vfs_llseek(file
, seek
->seek_offset
, whence
);
1202 if (seek
->seek_pos
< 0)
1203 status
= nfserrno(seek
->seek_pos
);
1204 else if (seek
->seek_pos
>= i_size_read(file_inode(file
)))
1205 seek
->seek_eof
= true;
1212 /* This routine never returns NFS_OK! If there are no other errors, it
1213 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1214 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1215 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1218 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1219 struct nfsd4_verify
*verify
)
1225 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
1229 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
1233 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
1234 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
1235 return nfserr_inval
;
1236 if (verify
->ve_attrlen
& 3)
1237 return nfserr_inval
;
1240 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1242 count
= 4 + (verify
->ve_attrlen
>> 2);
1243 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
1245 return nfserr_jukebox
;
1248 status
= nfsd4_encode_fattr_to_buf(&p
, count
, &cstate
->current_fh
,
1249 cstate
->current_fh
.fh_export
,
1250 cstate
->current_fh
.fh_dentry
,
1254 * If nfsd4_encode_fattr() ran out of space, assume that's because
1255 * the attributes are longer (hence different) than those given:
1257 if (status
== nfserr_resource
)
1258 status
= nfserr_not_same
;
1263 p
= buf
+ 1 + ntohl(buf
[0]);
1264 status
= nfserr_not_same
;
1265 if (ntohl(*p
++) != verify
->ve_attrlen
)
1267 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1268 status
= nfserr_same
;
1276 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1277 union nfsd4_op_u
*u
)
1281 status
= _nfsd4_verify(rqstp
, cstate
, &u
->verify
);
1282 return status
== nfserr_not_same
? nfs_ok
: status
;
1286 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1287 union nfsd4_op_u
*u
)
1291 status
= _nfsd4_verify(rqstp
, cstate
, &u
->nverify
);
1292 return status
== nfserr_same
? nfs_ok
: status
;
1295 #ifdef CONFIG_NFSD_PNFS
1296 static const struct nfsd4_layout_ops
*
1297 nfsd4_layout_verify(struct svc_export
*exp
, unsigned int layout_type
)
1299 if (!exp
->ex_layout_types
) {
1300 dprintk("%s: export does not support pNFS\n", __func__
);
1304 if (layout_type
>= LAYOUT_TYPE_MAX
||
1305 !(exp
->ex_layout_types
& (1 << layout_type
))) {
1306 dprintk("%s: layout type %d not supported\n",
1307 __func__
, layout_type
);
1311 return nfsd4_layout_ops
[layout_type
];
1315 nfsd4_getdeviceinfo(struct svc_rqst
*rqstp
,
1316 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
1318 struct nfsd4_getdeviceinfo
*gdp
= &u
->getdeviceinfo
;
1319 const struct nfsd4_layout_ops
*ops
;
1320 struct nfsd4_deviceid_map
*map
;
1321 struct svc_export
*exp
;
1324 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1326 gdp
->gd_layout_type
,
1327 gdp
->gd_devid
.fsid_idx
, gdp
->gd_devid
.generation
,
1330 map
= nfsd4_find_devid_map(gdp
->gd_devid
.fsid_idx
);
1332 dprintk("%s: couldn't find device ID to export mapping!\n",
1334 return nfserr_noent
;
1337 exp
= rqst_exp_find(rqstp
, map
->fsid_type
, map
->fsid
);
1339 dprintk("%s: could not find device id\n", __func__
);
1340 return nfserr_noent
;
1343 nfserr
= nfserr_layoutunavailable
;
1344 ops
= nfsd4_layout_verify(exp
, gdp
->gd_layout_type
);
1349 if (gdp
->gd_maxcount
!= 0) {
1350 nfserr
= ops
->proc_getdeviceinfo(exp
->ex_path
.mnt
->mnt_sb
,
1351 rqstp
, cstate
->session
->se_client
, gdp
);
1354 gdp
->gd_notify_types
&= ops
->notify_types
;
1361 nfsd4_getdeviceinfo_release(union nfsd4_op_u
*u
)
1363 kfree(u
->getdeviceinfo
.gd_device
);
1367 nfsd4_layoutget(struct svc_rqst
*rqstp
,
1368 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
1370 struct nfsd4_layoutget
*lgp
= &u
->layoutget
;
1371 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1372 const struct nfsd4_layout_ops
*ops
;
1373 struct nfs4_layout_stateid
*ls
;
1377 switch (lgp
->lg_seg
.iomode
) {
1379 accmode
= NFSD_MAY_READ
;
1382 accmode
= NFSD_MAY_READ
| NFSD_MAY_WRITE
;
1385 dprintk("%s: invalid iomode %d\n",
1386 __func__
, lgp
->lg_seg
.iomode
);
1387 nfserr
= nfserr_badiomode
;
1391 nfserr
= fh_verify(rqstp
, current_fh
, 0, accmode
);
1395 nfserr
= nfserr_layoutunavailable
;
1396 ops
= nfsd4_layout_verify(current_fh
->fh_export
, lgp
->lg_layout_type
);
1401 * Verify minlength and range as per RFC5661:
1402 * o If loga_length is less than loga_minlength,
1403 * the metadata server MUST return NFS4ERR_INVAL.
1404 * o If the sum of loga_offset and loga_minlength exceeds
1405 * NFS4_UINT64_MAX, and loga_minlength is not
1406 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1407 * o If the sum of loga_offset and loga_length exceeds
1408 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1409 * the error NFS4ERR_INVAL MUST result.
1411 nfserr
= nfserr_inval
;
1412 if (lgp
->lg_seg
.length
< lgp
->lg_minlength
||
1413 (lgp
->lg_minlength
!= NFS4_MAX_UINT64
&&
1414 lgp
->lg_minlength
> NFS4_MAX_UINT64
- lgp
->lg_seg
.offset
) ||
1415 (lgp
->lg_seg
.length
!= NFS4_MAX_UINT64
&&
1416 lgp
->lg_seg
.length
> NFS4_MAX_UINT64
- lgp
->lg_seg
.offset
))
1418 if (lgp
->lg_seg
.length
== 0)
1421 nfserr
= nfsd4_preprocess_layout_stateid(rqstp
, cstate
, &lgp
->lg_sid
,
1422 true, lgp
->lg_layout_type
, &ls
);
1424 trace_layout_get_lookup_fail(&lgp
->lg_sid
);
1428 nfserr
= nfserr_recallconflict
;
1429 if (atomic_read(&ls
->ls_stid
.sc_file
->fi_lo_recalls
))
1432 nfserr
= ops
->proc_layoutget(d_inode(current_fh
->fh_dentry
),
1437 nfserr
= nfsd4_insert_layout(lgp
, ls
);
1440 mutex_unlock(&ls
->ls_mutex
);
1441 nfs4_put_stid(&ls
->ls_stid
);
1447 nfsd4_layoutget_release(union nfsd4_op_u
*u
)
1449 kfree(u
->layoutget
.lg_content
);
1453 nfsd4_layoutcommit(struct svc_rqst
*rqstp
,
1454 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
1456 struct nfsd4_layoutcommit
*lcp
= &u
->layoutcommit
;
1457 const struct nfsd4_layout_seg
*seg
= &lcp
->lc_seg
;
1458 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1459 const struct nfsd4_layout_ops
*ops
;
1460 loff_t new_size
= lcp
->lc_last_wr
+ 1;
1461 struct inode
*inode
;
1462 struct nfs4_layout_stateid
*ls
;
1465 nfserr
= fh_verify(rqstp
, current_fh
, 0, NFSD_MAY_WRITE
);
1469 nfserr
= nfserr_layoutunavailable
;
1470 ops
= nfsd4_layout_verify(current_fh
->fh_export
, lcp
->lc_layout_type
);
1473 inode
= d_inode(current_fh
->fh_dentry
);
1475 nfserr
= nfserr_inval
;
1476 if (new_size
<= seg
->offset
) {
1477 dprintk("pnfsd: last write before layout segment\n");
1480 if (new_size
> seg
->offset
+ seg
->length
) {
1481 dprintk("pnfsd: last write beyond layout segment\n");
1484 if (!lcp
->lc_newoffset
&& new_size
> i_size_read(inode
)) {
1485 dprintk("pnfsd: layoutcommit beyond EOF\n");
1489 nfserr
= nfsd4_preprocess_layout_stateid(rqstp
, cstate
, &lcp
->lc_sid
,
1490 false, lcp
->lc_layout_type
,
1493 trace_layout_commit_lookup_fail(&lcp
->lc_sid
);
1494 /* fixup error code as per RFC5661 */
1495 if (nfserr
== nfserr_bad_stateid
)
1496 nfserr
= nfserr_badlayout
;
1500 /* LAYOUTCOMMIT does not require any serialization */
1501 mutex_unlock(&ls
->ls_mutex
);
1503 if (new_size
> i_size_read(inode
)) {
1504 lcp
->lc_size_chg
= 1;
1505 lcp
->lc_newsize
= new_size
;
1507 lcp
->lc_size_chg
= 0;
1510 nfserr
= ops
->proc_layoutcommit(inode
, lcp
);
1511 nfs4_put_stid(&ls
->ls_stid
);
1517 nfsd4_layoutreturn(struct svc_rqst
*rqstp
,
1518 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
1520 struct nfsd4_layoutreturn
*lrp
= &u
->layoutreturn
;
1521 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1524 nfserr
= fh_verify(rqstp
, current_fh
, 0, NFSD_MAY_NOP
);
1528 nfserr
= nfserr_layoutunavailable
;
1529 if (!nfsd4_layout_verify(current_fh
->fh_export
, lrp
->lr_layout_type
))
1532 switch (lrp
->lr_seg
.iomode
) {
1538 dprintk("%s: invalid iomode %d\n", __func__
,
1539 lrp
->lr_seg
.iomode
);
1540 nfserr
= nfserr_inval
;
1544 switch (lrp
->lr_return_type
) {
1546 nfserr
= nfsd4_return_file_layouts(rqstp
, cstate
, lrp
);
1550 nfserr
= nfsd4_return_client_layouts(rqstp
, cstate
, lrp
);
1553 dprintk("%s: invalid return_type %d\n", __func__
,
1554 lrp
->lr_return_type
);
1555 nfserr
= nfserr_inval
;
1561 #endif /* CONFIG_NFSD_PNFS */
1567 nfsd4_proc_null(struct svc_rqst
*rqstp
)
1572 static inline void nfsd4_increment_op_stats(u32 opnum
)
1574 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1575 nfsdstats
.nfs4_opcount
[opnum
]++;
1578 static const struct nfsd4_operation nfsd4_ops
[];
1580 static const char *nfsd4_op_name(unsigned opnum
);
1583 * Enforce NFSv4.1 COMPOUND ordering rules:
1585 * Also note, enforced elsewhere:
1586 * - SEQUENCE other than as first op results in
1587 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1588 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1589 * (Enforced in nfsd4_bind_conn_to_session().)
1590 * - DESTROY_SESSION must be the final operation in a compound, if
1591 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1592 * (Enforced in nfsd4_destroy_session().)
1594 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1596 struct nfsd4_op
*op
= &args
->ops
[0];
1598 /* These ordering requirements don't apply to NFSv4.0: */
1599 if (args
->minorversion
== 0)
1601 /* This is weird, but OK, not our problem: */
1602 if (args
->opcnt
== 0)
1604 if (op
->status
== nfserr_op_illegal
)
1606 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1607 return nfserr_op_not_in_session
;
1608 if (op
->opnum
== OP_SEQUENCE
)
1610 if (args
->opcnt
!= 1)
1611 return nfserr_not_only_op
;
1615 const struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1617 return &nfsd4_ops
[op
->opnum
];
1620 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1622 if (op
->opnum
== OP_ILLEGAL
)
1624 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1627 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1629 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1630 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1631 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1632 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1633 const struct nfsd4_operation
*thisd
= OPDESC(this);
1634 const struct nfsd4_operation
*nextd
;
1637 * Most ops check wronsec on our own; only the putfh-like ops
1638 * have special rules.
1640 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1643 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1644 * put-filehandle operation if we're not going to use the
1647 if (argp
->opcnt
== resp
->opcnt
)
1649 if (next
->opnum
== OP_ILLEGAL
)
1651 nextd
= OPDESC(next
);
1653 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1654 * errors themselves as necessary; others should check for them
1657 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1660 static void svcxdr_init_encode(struct svc_rqst
*rqstp
,
1661 struct nfsd4_compoundres
*resp
)
1663 struct xdr_stream
*xdr
= &resp
->xdr
;
1664 struct xdr_buf
*buf
= &rqstp
->rq_res
;
1665 struct kvec
*head
= buf
->head
;
1669 xdr
->p
= head
->iov_base
+ head
->iov_len
;
1670 xdr
->end
= head
->iov_base
+ PAGE_SIZE
- rqstp
->rq_auth_slack
;
1671 /* Tail and page_len should be zero at this point: */
1672 buf
->len
= buf
->head
[0].iov_len
;
1673 xdr
->scratch
.iov_len
= 0;
1674 xdr
->page_ptr
= buf
->pages
- 1;
1675 buf
->buflen
= PAGE_SIZE
* (1 + rqstp
->rq_page_end
- buf
->pages
)
1676 - rqstp
->rq_auth_slack
;
1683 nfsd4_proc_compound(struct svc_rqst
*rqstp
)
1685 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1686 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1687 struct nfsd4_op
*op
;
1688 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1689 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1690 struct svc_fh
*save_fh
= &cstate
->save_fh
;
1693 svcxdr_init_encode(rqstp
, resp
);
1694 resp
->tagp
= resp
->xdr
.p
;
1695 /* reserve space for: taglen, tag, and opcnt */
1696 xdr_reserve_space(&resp
->xdr
, 8 + args
->taglen
);
1697 resp
->taglen
= args
->taglen
;
1698 resp
->tag
= args
->tag
;
1699 resp
->rqstp
= rqstp
;
1700 cstate
->minorversion
= args
->minorversion
;
1701 fh_init(current_fh
, NFS4_FHSIZE
);
1702 fh_init(save_fh
, NFS4_FHSIZE
);
1704 * Don't use the deferral mechanism for NFSv4; compounds make it
1705 * too hard to avoid non-idempotency problems.
1707 clear_bit(RQ_USEDEFERRAL
, &rqstp
->rq_flags
);
1710 * According to RFC3010, this takes precedence over all other errors.
1712 status
= nfserr_minor_vers_mismatch
;
1713 if (nfsd_minorversion(args
->minorversion
, NFSD_TEST
) <= 0)
1716 status
= nfs41_check_op_ordering(args
);
1719 op
->status
= status
;
1723 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1724 op
= &args
->ops
[resp
->opcnt
++];
1726 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1727 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1728 nfsd4_op_name(op
->opnum
));
1730 * The XDR decode routines may have pre-set op->status;
1731 * for example, if there is a miscellaneous XDR error
1732 * it will be set to nfserr_bad_xdr.
1735 if (op
->opnum
== OP_OPEN
)
1736 op
->status
= nfsd4_open_omfg(rqstp
, cstate
, op
);
1740 if (!current_fh
->fh_dentry
) {
1741 if (!(op
->opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1742 op
->status
= nfserr_nofilehandle
;
1745 } else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
1746 !(op
->opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1747 op
->status
= nfserr_moved
;
1751 fh_clear_wcc(current_fh
);
1753 /* If op is non-idempotent */
1754 if (op
->opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1756 * Don't execute this op if we couldn't encode a
1759 u32 plen
= op
->opdesc
->op_rsize_bop(rqstp
, op
);
1761 * Plus if there's another operation, make sure
1762 * we'll have space to at least encode an error:
1764 if (resp
->opcnt
< args
->opcnt
)
1765 plen
+= COMPOUND_ERR_SLACK_SPACE
;
1766 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1772 if (op
->opdesc
->op_get_currentstateid
)
1773 op
->opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1774 op
->status
= op
->opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1776 /* Only from SEQUENCE */
1777 if (cstate
->status
== nfserr_replay_cache
) {
1778 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1779 status
= op
->status
;
1783 if (op
->opdesc
->op_set_currentstateid
)
1784 op
->opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1786 if (op
->opdesc
->op_flags
& OP_CLEAR_STATEID
)
1787 clear_current_stateid(cstate
);
1789 if (need_wrongsec_check(rqstp
))
1790 op
->status
= check_nfsd_access(current_fh
->fh_export
, rqstp
);
1793 if (op
->status
== nfserr_replay_me
) {
1794 op
->replay
= &cstate
->replay_owner
->so_replay
;
1795 nfsd4_encode_replay(&resp
->xdr
, op
);
1796 status
= op
->status
= op
->replay
->rp_status
;
1798 nfsd4_encode_operation(resp
, op
);
1799 status
= op
->status
;
1802 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1803 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1804 be32_to_cpu(status
));
1806 nfsd4_cstate_clear_replay(cstate
);
1807 nfsd4_increment_op_stats(op
->opnum
);
1810 cstate
->status
= status
;
1813 BUG_ON(cstate
->replay_owner
);
1815 /* Reset deferral mechanism for RPC deferrals */
1816 set_bit(RQ_USEDEFERRAL
, &rqstp
->rq_flags
);
1817 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1821 #define op_encode_hdr_size (2)
1822 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1823 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1824 #define op_encode_change_info_maxsz (5)
1825 #define nfs4_fattr_bitmap_maxsz (4)
1827 /* We'll fall back on returning no lockowner if run out of space: */
1828 #define op_encode_lockowner_maxsz (0)
1829 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1831 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1833 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1834 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1835 op_encode_ace_maxsz)
1837 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1839 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1841 return (op_encode_hdr_size
) * sizeof(__be32
);
1844 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1846 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1849 static inline u32
nfsd4_access_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1851 /* ac_supported, ac_resp_access */
1852 return (op_encode_hdr_size
+ 2)* sizeof(__be32
);
1855 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1857 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1860 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1862 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1863 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1867 * Note since this is an idempotent operation we won't insist on failing
1868 * the op prematurely if the estimate is too large. We may turn off splice
1869 * reads unnecessarily.
1871 static inline u32
nfsd4_getattr_rsize(struct svc_rqst
*rqstp
,
1872 struct nfsd4_op
*op
)
1874 u32
*bmap
= op
->u
.getattr
.ga_bmval
;
1875 u32 bmap0
= bmap
[0], bmap1
= bmap
[1], bmap2
= bmap
[2];
1878 if (bmap0
& FATTR4_WORD0_ACL
)
1879 return svc_max_payload(rqstp
);
1880 if (bmap0
& FATTR4_WORD0_FS_LOCATIONS
)
1881 return svc_max_payload(rqstp
);
1883 if (bmap1
& FATTR4_WORD1_OWNER
) {
1884 ret
+= IDMAP_NAMESZ
+ 4;
1885 bmap1
&= ~FATTR4_WORD1_OWNER
;
1887 if (bmap1
& FATTR4_WORD1_OWNER_GROUP
) {
1888 ret
+= IDMAP_NAMESZ
+ 4;
1889 bmap1
&= ~FATTR4_WORD1_OWNER_GROUP
;
1891 if (bmap0
& FATTR4_WORD0_FILEHANDLE
) {
1892 ret
+= NFS4_FHSIZE
+ 4;
1893 bmap0
&= ~FATTR4_WORD0_FILEHANDLE
;
1895 if (bmap2
& FATTR4_WORD2_SECURITY_LABEL
) {
1896 ret
+= NFS4_MAXLABELLEN
+ 12;
1897 bmap2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
1900 * Largest of remaining attributes are 16 bytes (e.g.,
1901 * supported_attributes)
1903 ret
+= 16 * (hweight32(bmap0
) + hweight32(bmap1
) + hweight32(bmap2
));
1904 /* bitmask, length */
1909 static inline u32
nfsd4_getfh_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1911 return (op_encode_hdr_size
+ 1) * sizeof(__be32
) + NFS4_FHSIZE
;
1914 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1916 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1920 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1922 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1926 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1928 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1929 + op_encode_change_info_maxsz
+ 1
1930 + nfs4_fattr_bitmap_maxsz
1931 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1934 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1936 u32 maxcount
= 0, rlen
= 0;
1938 maxcount
= svc_max_payload(rqstp
);
1939 rlen
= min(op
->u
.read
.rd_length
, maxcount
);
1941 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1944 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1946 u32 maxcount
= 0, rlen
= 0;
1948 maxcount
= svc_max_payload(rqstp
);
1949 rlen
= min(op
->u
.readdir
.rd_maxcount
, maxcount
);
1951 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
+
1952 XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1955 static inline u32
nfsd4_readlink_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1957 return (op_encode_hdr_size
+ 1) * sizeof(__be32
) + PAGE_SIZE
;
1960 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1962 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1966 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1968 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1969 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1972 static inline u32
nfsd4_sequence_rsize(struct svc_rqst
*rqstp
,
1973 struct nfsd4_op
*op
)
1975 return (op_encode_hdr_size
1976 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + 5) * sizeof(__be32
);
1979 static inline u32
nfsd4_test_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1981 return (op_encode_hdr_size
+ 1 + op
->u
.test_stateid
.ts_num_ids
)
1985 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1987 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1990 static inline u32
nfsd4_secinfo_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1992 return (op_encode_hdr_size
+ RPC_AUTH_MAXFLAVOR
*
1993 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN
))) * sizeof(__be32
);
1996 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1998 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE
)) *
2002 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2004 return (op_encode_hdr_size
+ 2 + op_encode_verifier_maxsz
) * sizeof(__be32
);
2007 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2009 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
2010 1 + 1 + /* eir_flags, spr_how */\
2011 4 + /* spo_must_enforce & _allow with bitmap */\
2012 2 + /*eir_server_owner.so_minor_id */\
2013 /* eir_server_owner.so_major_id<> */\
2014 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
2015 /* eir_server_scope<> */\
2016 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
2017 1 + /* eir_server_impl_id array length */\
2018 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
2021 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2023 return (op_encode_hdr_size
+ \
2024 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
2025 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
2028 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2030 return (op_encode_hdr_size
+ \
2031 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
2032 2 + /* csr_sequence, csr_flags */\
2033 op_encode_channel_attrs_maxsz
+ \
2034 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
2037 static inline u32
nfsd4_copy_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2039 return (op_encode_hdr_size
+
2040 1 /* wr_callback */ +
2041 op_encode_stateid_maxsz
/* wr_callback */ +
2043 1 /* wr_committed */ +
2044 op_encode_verifier_maxsz
+
2045 1 /* cr_consecutive */ +
2046 1 /* cr_synchronous */) * sizeof(__be32
);
2049 #ifdef CONFIG_NFSD_PNFS
2050 static inline u32
nfsd4_getdeviceinfo_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2052 u32 maxcount
= 0, rlen
= 0;
2054 maxcount
= svc_max_payload(rqstp
);
2055 rlen
= min(op
->u
.getdeviceinfo
.gd_maxcount
, maxcount
);
2057 return (op_encode_hdr_size
+
2058 1 /* gd_layout_type*/ +
2060 2 /* gd_notify_types */) * sizeof(__be32
);
2064 * At this stage we don't really know what layout driver will handle the request,
2065 * so we need to define an arbitrary upper bound here.
2067 #define MAX_LAYOUT_SIZE 128
2068 static inline u32
nfsd4_layoutget_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2070 return (op_encode_hdr_size
+
2071 1 /* logr_return_on_close */ +
2072 op_encode_stateid_maxsz
+
2073 1 /* nr of layouts */ +
2074 MAX_LAYOUT_SIZE
) * sizeof(__be32
);
2077 static inline u32
nfsd4_layoutcommit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2079 return (op_encode_hdr_size
+
2080 1 /* locr_newsize */ +
2081 2 /* ns_size */) * sizeof(__be32
);
2084 static inline u32
nfsd4_layoutreturn_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2086 return (op_encode_hdr_size
+
2087 1 /* lrs_stateid */ +
2088 op_encode_stateid_maxsz
) * sizeof(__be32
);
2090 #endif /* CONFIG_NFSD_PNFS */
2093 static inline u32
nfsd4_seek_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2095 return (op_encode_hdr_size
+ 3) * sizeof(__be32
);
2098 static const struct nfsd4_operation nfsd4_ops
[] = {
2100 .op_func
= nfsd4_access
,
2101 .op_name
= "OP_ACCESS",
2102 .op_rsize_bop
= nfsd4_access_rsize
,
2105 .op_func
= nfsd4_close
,
2106 .op_flags
= OP_MODIFIES_SOMETHING
,
2107 .op_name
= "OP_CLOSE",
2108 .op_rsize_bop
= nfsd4_status_stateid_rsize
,
2109 .op_get_currentstateid
= nfsd4_get_closestateid
,
2110 .op_set_currentstateid
= nfsd4_set_closestateid
,
2113 .op_func
= nfsd4_commit
,
2114 .op_flags
= OP_MODIFIES_SOMETHING
,
2115 .op_name
= "OP_COMMIT",
2116 .op_rsize_bop
= nfsd4_commit_rsize
,
2119 .op_func
= nfsd4_create
,
2120 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
2121 .op_name
= "OP_CREATE",
2122 .op_rsize_bop
= nfsd4_create_rsize
,
2124 [OP_DELEGRETURN
] = {
2125 .op_func
= nfsd4_delegreturn
,
2126 .op_flags
= OP_MODIFIES_SOMETHING
,
2127 .op_name
= "OP_DELEGRETURN",
2128 .op_rsize_bop
= nfsd4_only_status_rsize
,
2129 .op_get_currentstateid
= nfsd4_get_delegreturnstateid
,
2132 .op_func
= nfsd4_getattr
,
2133 .op_flags
= ALLOWED_ON_ABSENT_FS
,
2134 .op_rsize_bop
= nfsd4_getattr_rsize
,
2135 .op_name
= "OP_GETATTR",
2138 .op_func
= nfsd4_getfh
,
2139 .op_name
= "OP_GETFH",
2140 .op_rsize_bop
= nfsd4_getfh_rsize
,
2143 .op_func
= nfsd4_link
,
2144 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
2146 .op_name
= "OP_LINK",
2147 .op_rsize_bop
= nfsd4_link_rsize
,
2150 .op_func
= nfsd4_lock
,
2151 .op_flags
= OP_MODIFIES_SOMETHING
|
2152 OP_NONTRIVIAL_ERROR_ENCODE
,
2153 .op_name
= "OP_LOCK",
2154 .op_rsize_bop
= nfsd4_lock_rsize
,
2155 .op_set_currentstateid
= nfsd4_set_lockstateid
,
2158 .op_func
= nfsd4_lockt
,
2159 .op_flags
= OP_NONTRIVIAL_ERROR_ENCODE
,
2160 .op_name
= "OP_LOCKT",
2161 .op_rsize_bop
= nfsd4_lock_rsize
,
2164 .op_func
= nfsd4_locku
,
2165 .op_flags
= OP_MODIFIES_SOMETHING
,
2166 .op_name
= "OP_LOCKU",
2167 .op_rsize_bop
= nfsd4_status_stateid_rsize
,
2168 .op_get_currentstateid
= nfsd4_get_lockustateid
,
2171 .op_func
= nfsd4_lookup
,
2172 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
2173 .op_name
= "OP_LOOKUP",
2174 .op_rsize_bop
= nfsd4_only_status_rsize
,
2177 .op_func
= nfsd4_lookupp
,
2178 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
2179 .op_name
= "OP_LOOKUPP",
2180 .op_rsize_bop
= nfsd4_only_status_rsize
,
2183 .op_func
= nfsd4_nverify
,
2184 .op_name
= "OP_NVERIFY",
2185 .op_rsize_bop
= nfsd4_only_status_rsize
,
2188 .op_func
= nfsd4_open
,
2189 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
2190 .op_name
= "OP_OPEN",
2191 .op_rsize_bop
= nfsd4_open_rsize
,
2192 .op_set_currentstateid
= nfsd4_set_openstateid
,
2194 [OP_OPEN_CONFIRM
] = {
2195 .op_func
= nfsd4_open_confirm
,
2196 .op_flags
= OP_MODIFIES_SOMETHING
,
2197 .op_name
= "OP_OPEN_CONFIRM",
2198 .op_rsize_bop
= nfsd4_status_stateid_rsize
,
2200 [OP_OPEN_DOWNGRADE
] = {
2201 .op_func
= nfsd4_open_downgrade
,
2202 .op_flags
= OP_MODIFIES_SOMETHING
,
2203 .op_name
= "OP_OPEN_DOWNGRADE",
2204 .op_rsize_bop
= nfsd4_status_stateid_rsize
,
2205 .op_get_currentstateid
= nfsd4_get_opendowngradestateid
,
2206 .op_set_currentstateid
= nfsd4_set_opendowngradestateid
,
2209 .op_func
= nfsd4_putfh
,
2210 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2211 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
2212 .op_name
= "OP_PUTFH",
2213 .op_rsize_bop
= nfsd4_only_status_rsize
,
2216 .op_func
= nfsd4_putrootfh
,
2217 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2218 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
2219 .op_name
= "OP_PUTPUBFH",
2220 .op_rsize_bop
= nfsd4_only_status_rsize
,
2223 .op_func
= nfsd4_putrootfh
,
2224 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2225 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
2226 .op_name
= "OP_PUTROOTFH",
2227 .op_rsize_bop
= nfsd4_only_status_rsize
,
2230 .op_func
= nfsd4_read
,
2231 .op_release
= nfsd4_read_release
,
2232 .op_name
= "OP_READ",
2233 .op_rsize_bop
= nfsd4_read_rsize
,
2234 .op_get_currentstateid
= nfsd4_get_readstateid
,
2237 .op_func
= nfsd4_readdir
,
2238 .op_name
= "OP_READDIR",
2239 .op_rsize_bop
= nfsd4_readdir_rsize
,
2242 .op_func
= nfsd4_readlink
,
2243 .op_name
= "OP_READLINK",
2244 .op_rsize_bop
= nfsd4_readlink_rsize
,
2247 .op_func
= nfsd4_remove
,
2248 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2249 .op_name
= "OP_REMOVE",
2250 .op_rsize_bop
= nfsd4_remove_rsize
,
2253 .op_func
= nfsd4_rename
,
2254 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2255 .op_name
= "OP_RENAME",
2256 .op_rsize_bop
= nfsd4_rename_rsize
,
2259 .op_func
= nfsd4_renew
,
2260 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2261 | OP_MODIFIES_SOMETHING
,
2262 .op_name
= "OP_RENEW",
2263 .op_rsize_bop
= nfsd4_only_status_rsize
,
2267 .op_func
= nfsd4_restorefh
,
2268 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2269 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
2270 .op_name
= "OP_RESTOREFH",
2271 .op_rsize_bop
= nfsd4_only_status_rsize
,
2274 .op_func
= nfsd4_savefh
,
2275 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
2276 .op_name
= "OP_SAVEFH",
2277 .op_rsize_bop
= nfsd4_only_status_rsize
,
2280 .op_func
= nfsd4_secinfo
,
2281 .op_release
= nfsd4_secinfo_release
,
2282 .op_flags
= OP_HANDLES_WRONGSEC
,
2283 .op_name
= "OP_SECINFO",
2284 .op_rsize_bop
= nfsd4_secinfo_rsize
,
2287 .op_func
= nfsd4_setattr
,
2288 .op_name
= "OP_SETATTR",
2289 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
2290 | OP_NONTRIVIAL_ERROR_ENCODE
,
2291 .op_rsize_bop
= nfsd4_setattr_rsize
,
2292 .op_get_currentstateid
= nfsd4_get_setattrstateid
,
2294 [OP_SETCLIENTID
] = {
2295 .op_func
= nfsd4_setclientid
,
2296 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2297 | OP_MODIFIES_SOMETHING
| OP_CACHEME
2298 | OP_NONTRIVIAL_ERROR_ENCODE
,
2299 .op_name
= "OP_SETCLIENTID",
2300 .op_rsize_bop
= nfsd4_setclientid_rsize
,
2302 [OP_SETCLIENTID_CONFIRM
] = {
2303 .op_func
= nfsd4_setclientid_confirm
,
2304 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2305 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2306 .op_name
= "OP_SETCLIENTID_CONFIRM",
2307 .op_rsize_bop
= nfsd4_only_status_rsize
,
2310 .op_func
= nfsd4_verify
,
2311 .op_name
= "OP_VERIFY",
2312 .op_rsize_bop
= nfsd4_only_status_rsize
,
2315 .op_func
= nfsd4_write
,
2316 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2317 .op_name
= "OP_WRITE",
2318 .op_rsize_bop
= nfsd4_write_rsize
,
2319 .op_get_currentstateid
= nfsd4_get_writestateid
,
2321 [OP_RELEASE_LOCKOWNER
] = {
2322 .op_func
= nfsd4_release_lockowner
,
2323 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2324 | OP_MODIFIES_SOMETHING
,
2325 .op_name
= "OP_RELEASE_LOCKOWNER",
2326 .op_rsize_bop
= nfsd4_only_status_rsize
,
2329 /* NFSv4.1 operations */
2330 [OP_EXCHANGE_ID
] = {
2331 .op_func
= nfsd4_exchange_id
,
2332 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2333 | OP_MODIFIES_SOMETHING
,
2334 .op_name
= "OP_EXCHANGE_ID",
2335 .op_rsize_bop
= nfsd4_exchange_id_rsize
,
2337 [OP_BACKCHANNEL_CTL
] = {
2338 .op_func
= nfsd4_backchannel_ctl
,
2339 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
2340 .op_name
= "OP_BACKCHANNEL_CTL",
2341 .op_rsize_bop
= nfsd4_only_status_rsize
,
2343 [OP_BIND_CONN_TO_SESSION
] = {
2344 .op_func
= nfsd4_bind_conn_to_session
,
2345 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2346 | OP_MODIFIES_SOMETHING
,
2347 .op_name
= "OP_BIND_CONN_TO_SESSION",
2348 .op_rsize_bop
= nfsd4_bind_conn_to_session_rsize
,
2350 [OP_CREATE_SESSION
] = {
2351 .op_func
= nfsd4_create_session
,
2352 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2353 | OP_MODIFIES_SOMETHING
,
2354 .op_name
= "OP_CREATE_SESSION",
2355 .op_rsize_bop
= nfsd4_create_session_rsize
,
2357 [OP_DESTROY_SESSION
] = {
2358 .op_func
= nfsd4_destroy_session
,
2359 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2360 | OP_MODIFIES_SOMETHING
,
2361 .op_name
= "OP_DESTROY_SESSION",
2362 .op_rsize_bop
= nfsd4_only_status_rsize
,
2365 .op_func
= nfsd4_sequence
,
2366 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
2367 .op_name
= "OP_SEQUENCE",
2368 .op_rsize_bop
= nfsd4_sequence_rsize
,
2370 [OP_DESTROY_CLIENTID
] = {
2371 .op_func
= nfsd4_destroy_clientid
,
2372 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2373 | OP_MODIFIES_SOMETHING
,
2374 .op_name
= "OP_DESTROY_CLIENTID",
2375 .op_rsize_bop
= nfsd4_only_status_rsize
,
2377 [OP_RECLAIM_COMPLETE
] = {
2378 .op_func
= nfsd4_reclaim_complete
,
2379 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
2380 .op_name
= "OP_RECLAIM_COMPLETE",
2381 .op_rsize_bop
= nfsd4_only_status_rsize
,
2383 [OP_SECINFO_NO_NAME
] = {
2384 .op_func
= nfsd4_secinfo_no_name
,
2385 .op_release
= nfsd4_secinfo_no_name_release
,
2386 .op_flags
= OP_HANDLES_WRONGSEC
,
2387 .op_name
= "OP_SECINFO_NO_NAME",
2388 .op_rsize_bop
= nfsd4_secinfo_rsize
,
2390 [OP_TEST_STATEID
] = {
2391 .op_func
= nfsd4_test_stateid
,
2392 .op_flags
= ALLOWED_WITHOUT_FH
,
2393 .op_name
= "OP_TEST_STATEID",
2394 .op_rsize_bop
= nfsd4_test_stateid_rsize
,
2396 [OP_FREE_STATEID
] = {
2397 .op_func
= nfsd4_free_stateid
,
2398 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
2399 .op_name
= "OP_FREE_STATEID",
2400 .op_get_currentstateid
= nfsd4_get_freestateid
,
2401 .op_rsize_bop
= nfsd4_only_status_rsize
,
2403 #ifdef CONFIG_NFSD_PNFS
2404 [OP_GETDEVICEINFO
] = {
2405 .op_func
= nfsd4_getdeviceinfo
,
2406 .op_release
= nfsd4_getdeviceinfo_release
,
2407 .op_flags
= ALLOWED_WITHOUT_FH
,
2408 .op_name
= "OP_GETDEVICEINFO",
2409 .op_rsize_bop
= nfsd4_getdeviceinfo_rsize
,
2412 .op_func
= nfsd4_layoutget
,
2413 .op_release
= nfsd4_layoutget_release
,
2414 .op_flags
= OP_MODIFIES_SOMETHING
,
2415 .op_name
= "OP_LAYOUTGET",
2416 .op_rsize_bop
= nfsd4_layoutget_rsize
,
2418 [OP_LAYOUTCOMMIT
] = {
2419 .op_func
= nfsd4_layoutcommit
,
2420 .op_flags
= OP_MODIFIES_SOMETHING
,
2421 .op_name
= "OP_LAYOUTCOMMIT",
2422 .op_rsize_bop
= nfsd4_layoutcommit_rsize
,
2424 [OP_LAYOUTRETURN
] = {
2425 .op_func
= nfsd4_layoutreturn
,
2426 .op_flags
= OP_MODIFIES_SOMETHING
,
2427 .op_name
= "OP_LAYOUTRETURN",
2428 .op_rsize_bop
= nfsd4_layoutreturn_rsize
,
2430 #endif /* CONFIG_NFSD_PNFS */
2432 /* NFSv4.2 operations */
2434 .op_func
= nfsd4_allocate
,
2435 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2436 .op_name
= "OP_ALLOCATE",
2437 .op_rsize_bop
= nfsd4_only_status_rsize
,
2440 .op_func
= nfsd4_deallocate
,
2441 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2442 .op_name
= "OP_DEALLOCATE",
2443 .op_rsize_bop
= nfsd4_only_status_rsize
,
2446 .op_func
= nfsd4_clone
,
2447 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2448 .op_name
= "OP_CLONE",
2449 .op_rsize_bop
= nfsd4_only_status_rsize
,
2452 .op_func
= nfsd4_copy
,
2453 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2454 .op_name
= "OP_COPY",
2455 .op_rsize_bop
= nfsd4_copy_rsize
,
2458 .op_func
= nfsd4_seek
,
2459 .op_name
= "OP_SEEK",
2460 .op_rsize_bop
= nfsd4_seek_rsize
,
2465 * nfsd4_spo_must_allow - Determine if the compound op contains an
2466 * operation that is allowed to be sent with machine credentials
2468 * @rqstp: a pointer to the struct svc_rqst
2470 * Checks to see if the compound contains a spo_must_allow op
2471 * and confirms that it was sent with the proper machine creds.
2474 bool nfsd4_spo_must_allow(struct svc_rqst
*rqstp
)
2476 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2477 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
2478 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
2479 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
2480 struct nfs4_op_map
*allow
= &cstate
->clp
->cl_spo_must_allow
;
2483 if (!cstate
->minorversion
)
2486 if (cstate
->spo_must_allowed
== true)
2489 opiter
= resp
->opcnt
;
2490 while (opiter
< argp
->opcnt
) {
2491 this = &argp
->ops
[opiter
++];
2492 if (test_bit(this->opnum
, allow
->u
.longs
) &&
2493 cstate
->clp
->cl_mach_cred
&&
2494 nfsd4_mach_creds_match(cstate
->clp
, rqstp
)) {
2495 cstate
->spo_must_allowed
= true;
2499 cstate
->spo_must_allowed
= false;
2503 int nfsd4_max_reply(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2505 if (op
->opnum
== OP_ILLEGAL
|| op
->status
== nfserr_notsupp
)
2506 return op_encode_hdr_size
* sizeof(__be32
);
2508 BUG_ON(OPDESC(op
)->op_rsize_bop
== NULL
);
2509 return OPDESC(op
)->op_rsize_bop(rqstp
, op
);
2512 void warn_on_nonidempotent_op(struct nfsd4_op
*op
)
2514 if (OPDESC(op
)->op_flags
& OP_MODIFIES_SOMETHING
) {
2515 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2516 op
->opnum
, nfsd4_op_name(op
->opnum
));
2521 static const char *nfsd4_op_name(unsigned opnum
)
2523 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
2524 return nfsd4_ops
[opnum
].op_name
;
2525 return "unknown_operation";
2528 #define nfsd4_voidres nfsd4_voidargs
2529 struct nfsd4_voidargs
{ int dummy
; };
2531 static const struct svc_procedure nfsd_procedures4
[2] = {
2533 .pc_func
= nfsd4_proc_null
,
2534 .pc_encode
= nfs4svc_encode_voidres
,
2535 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
2536 .pc_ressize
= sizeof(struct nfsd4_voidres
),
2537 .pc_cachetype
= RC_NOCACHE
,
2540 [NFSPROC4_COMPOUND
] = {
2541 .pc_func
= nfsd4_proc_compound
,
2542 .pc_decode
= nfs4svc_decode_compoundargs
,
2543 .pc_encode
= nfs4svc_encode_compoundres
,
2544 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
2545 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
2546 .pc_release
= nfsd4_release_compoundargs
,
2547 .pc_cachetype
= RC_NOCACHE
,
2548 .pc_xdrressize
= NFSD_BUFSIZE
/4,
2552 static unsigned int nfsd_count3
[ARRAY_SIZE(nfsd_procedures4
)];
2553 const struct svc_version nfsd_version4
= {
2556 .vs_proc
= nfsd_procedures4
,
2557 .vs_count
= nfsd_count3
,
2558 .vs_dispatch
= nfsd_dispatch
,
2559 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,
2560 .vs_rpcb_optnl
= true,
2561 .vs_need_cong_ctrl
= true,