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
);
58 mutex_lock(&inode
->i_mutex
);
59 status
= security_inode_setsecctx(resfh
->fh_dentry
,
60 label
->data
, label
->len
);
61 mutex_unlock(&inode
->i_mutex
);
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
;
100 * Check about attributes are supported by the NFSv4 server or not.
101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
103 if ((bmval
[0] & ~nfsd_suppattrs0(cstate
->minorversion
)) ||
104 (bmval
[1] & ~nfsd_suppattrs1(cstate
->minorversion
)) ||
105 (bmval
[2] & ~nfsd_suppattrs2(cstate
->minorversion
)))
106 return nfserr_attrnotsupp
;
109 * Check FATTR4_WORD0_ACL can be supported
110 * in current environment or not.
112 if (bmval
[0] & FATTR4_WORD0_ACL
) {
113 if (!IS_POSIXACL(d_inode(dentry
)))
114 return nfserr_attrnotsupp
;
118 * According to spec, read-only attributes return ERR_INVAL.
121 if ((bmval
[0] & ~writable
[0]) || (bmval
[1] & ~writable
[1]) ||
122 (bmval
[2] & ~writable
[2]))
130 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
131 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
133 __be32 status
= nfs_ok
;
135 if (open
->op_create
== NFS4_OPEN_CREATE
) {
136 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
137 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
138 status
= check_attr_support(rqstp
, cstate
,
139 open
->op_bmval
, nfsd_attrmask
);
140 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
141 status
= check_attr_support(rqstp
, cstate
,
142 open
->op_bmval
, nfsd41_ex_attrmask
);
149 is_create_with_attrs(struct nfsd4_open
*open
)
151 return open
->op_create
== NFS4_OPEN_CREATE
152 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
153 || open
->op_createmode
== NFS4_CREATE_GUARDED
154 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
158 * if error occurs when setting the acl, just clear the acl bit
159 * in the returned attr bitmap.
162 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
163 struct nfs4_acl
*acl
, u32
*bmval
)
167 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
170 * We should probably fail the whole open at this point,
171 * but we've already created the file, so it's too late;
172 * So this seems the least of evils:
174 bmval
[0] &= ~FATTR4_WORD0_ACL
;
178 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
181 dget(src
->fh_dentry
);
183 exp_get(src
->fh_export
);
188 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
192 if (open
->op_truncate
&&
193 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
196 accmode
|= NFSD_MAY_READ_IF_EXEC
;
198 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
199 accmode
|= NFSD_MAY_READ
;
200 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
201 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
202 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
203 accmode
|= NFSD_MAY_WRITE
;
205 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
210 static __be32
nfsd_check_obj_isreg(struct svc_fh
*fh
)
212 umode_t mode
= d_inode(fh
->fh_dentry
)->i_mode
;
219 * Using err_symlink as our catch-all case may look odd; but
220 * there's no other obvious error for this case in 4.0, and we
221 * happen to know that it will cause the linux v4 client to do
222 * the right thing on attempts to open something other than a
225 return nfserr_symlink
;
228 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
*resfh
)
230 if (nfsd4_has_session(cstate
))
232 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
237 do_open_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
, struct svc_fh
**resfh
)
239 struct svc_fh
*current_fh
= &cstate
->current_fh
;
243 *resfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
245 return nfserr_jukebox
;
246 fh_init(*resfh
, NFS4_FHSIZE
);
247 open
->op_truncate
= 0;
249 if (open
->op_create
) {
250 /* FIXME: check session persistence and pnfs flags.
251 * The nfsv4.1 spec requires the following semantics:
253 * Persistent | pNFS | Server REQUIRED | Client Allowed
254 * Reply Cache | server | |
255 * -------------+--------+-----------------+--------------------
256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
258 * | | and EXCLUSIVE4 | or EXCLUSIVE4
260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
261 * yes | no | GUARDED4 | GUARDED4
262 * yes | yes | GUARDED4 | GUARDED4
266 * Note: create modes (UNCHECKED,GUARDED...) are the same
267 * in NFSv4 as in v3 except EXCLUSIVE4_1.
269 status
= do_nfsd_create(rqstp
, current_fh
, open
->op_fname
.data
,
270 open
->op_fname
.len
, &open
->op_iattr
,
271 *resfh
, open
->op_createmode
,
272 (u32
*)open
->op_verf
.data
,
273 &open
->op_truncate
, &open
->op_created
);
275 if (!status
&& open
->op_label
.len
)
276 nfsd4_security_inode_setsecctx(*resfh
, &open
->op_label
, open
->op_bmval
);
279 * Following rfc 3530 14.2.16, use the returned bitmask
280 * to indicate which attributes we used to store the
283 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
284 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
285 FATTR4_WORD1_TIME_MODIFY
);
288 * Note this may exit with the parent still locked.
289 * We will hold the lock until nfsd4_open's final
290 * lookup, to prevent renames or unlinks until we've had
291 * a chance to an acquire a delegation if appropriate.
293 status
= nfsd_lookup(rqstp
, current_fh
,
294 open
->op_fname
.data
, open
->op_fname
.len
, *resfh
);
297 status
= nfsd_check_obj_isreg(*resfh
);
301 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
302 do_set_nfs4_acl(rqstp
, *resfh
, open
->op_acl
, open
->op_bmval
);
304 nfsd4_set_open_owner_reply_cache(cstate
, open
, *resfh
);
305 accmode
= NFSD_MAY_NOP
;
306 if (open
->op_created
||
307 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
308 accmode
|= NFSD_MAY_OWNER_OVERRIDE
;
309 status
= do_open_permission(rqstp
, *resfh
, open
, accmode
);
310 set_change_info(&open
->op_cinfo
, current_fh
);
316 do_open_fhandle(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
318 struct svc_fh
*current_fh
= &cstate
->current_fh
;
322 /* We don't know the target directory, and therefore can not
323 * set the change info
326 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
328 nfsd4_set_open_owner_reply_cache(cstate
, open
, current_fh
);
330 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
331 (open
->op_iattr
.ia_size
== 0);
333 * In the delegation case, the client is telling us about an
334 * open that it *already* performed locally, some time ago. We
335 * should let it succeed now if possible.
337 * In the case of a CLAIM_FH open, on the other hand, the client
338 * may be counting on us to enforce permissions (the Linux 4.1
339 * client uses this for normal opens, for example).
341 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
)
342 accmode
= NFSD_MAY_OWNER_OVERRIDE
;
344 status
= do_open_permission(rqstp
, current_fh
, open
, accmode
);
350 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
352 struct nfsd4_sessionid
*sid
=
353 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
355 clid
->cl_boot
= sid
->clientid
.cl_boot
;
356 clid
->cl_id
= sid
->clientid
.cl_id
;
360 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
361 struct nfsd4_open
*open
)
364 struct svc_fh
*resfh
= NULL
;
365 struct nfsd4_compoundres
*resp
;
366 struct net
*net
= SVC_NET(rqstp
);
367 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
369 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
370 (int)open
->op_fname
.len
, open
->op_fname
.data
,
373 /* This check required by spec. */
374 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
377 open
->op_created
= 0;
380 * Before RECLAIM_COMPLETE done, server should deny new lock
382 if (nfsd4_has_session(cstate
) &&
383 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
384 &cstate
->session
->se_client
->cl_flags
) &&
385 open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
388 if (nfsd4_has_session(cstate
))
389 copy_clientid(&open
->op_clientid
, cstate
->session
);
391 /* check seqid for replay. set nfs4_owner */
392 resp
= rqstp
->rq_resp
;
393 status
= nfsd4_process_open1(&resp
->cstate
, open
, nn
);
394 if (status
== nfserr_replay_me
) {
395 struct nfs4_replay
*rp
= &open
->op_openowner
->oo_owner
.so_replay
;
396 fh_put(&cstate
->current_fh
);
397 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
399 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
401 dprintk("nfsd4_open: replay failed"
402 " restoring previous filehandle\n");
404 status
= nfserr_replay_me
;
408 if (open
->op_xdr_error
) {
409 status
= open
->op_xdr_error
;
413 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
417 /* Openowner is now set, so sequence id will get bumped. Now we need
418 * these checks before we do any creates: */
419 status
= nfserr_grace
;
420 if (locks_in_grace(net
) && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
422 status
= nfserr_no_grace
;
423 if (!locks_in_grace(net
) && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
426 switch (open
->op_claim_type
) {
427 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
428 case NFS4_OPEN_CLAIM_NULL
:
429 status
= do_open_lookup(rqstp
, cstate
, open
, &resfh
);
433 case NFS4_OPEN_CLAIM_PREVIOUS
:
434 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
438 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
439 case NFS4_OPEN_CLAIM_FH
:
440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
441 status
= do_open_fhandle(rqstp
, cstate
, open
);
444 resfh
= &cstate
->current_fh
;
446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
447 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
448 dprintk("NFSD: unsupported OPEN claim type %d\n",
449 open
->op_claim_type
);
450 status
= nfserr_notsupp
;
453 dprintk("NFSD: Invalid OPEN claim type %d\n",
454 open
->op_claim_type
);
455 status
= nfserr_inval
;
459 * nfsd4_process_open2() does the actual opening of the file. If
460 * successful, it (1) truncates the file if open->op_truncate was
461 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
463 status
= nfsd4_process_open2(rqstp
, resfh
, open
);
464 WARN(status
&& open
->op_created
,
465 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
466 be32_to_cpu(status
));
468 if (resfh
&& resfh
!= &cstate
->current_fh
) {
469 fh_dup2(&cstate
->current_fh
, resfh
);
473 nfsd4_cleanup_open_state(cstate
, open
);
474 nfsd4_bump_seqid(cstate
, status
);
479 * OPEN is the only seqid-mutating operation whose decoding can fail
480 * with a seqid-mutating error (specifically, decoding of user names in
481 * the attributes). Therefore we have to do some processing to look up
482 * the stateowner so that we can bump the seqid.
484 static __be32
nfsd4_open_omfg(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_op
*op
)
486 struct nfsd4_open
*open
= (struct nfsd4_open
*)&op
->u
;
488 if (!seqid_mutating_err(ntohl(op
->status
)))
490 if (nfsd4_has_session(cstate
))
492 open
->op_xdr_error
= op
->status
;
493 return nfsd4_open(rqstp
, cstate
, open
);
497 * filehandle-manipulating ops.
500 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
501 struct svc_fh
**getfh
)
503 if (!cstate
->current_fh
.fh_dentry
)
504 return nfserr_nofilehandle
;
506 *getfh
= &cstate
->current_fh
;
511 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
512 struct nfsd4_putfh
*putfh
)
514 fh_put(&cstate
->current_fh
);
515 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
516 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
518 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
522 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
527 fh_put(&cstate
->current_fh
);
528 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
533 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
536 if (!cstate
->save_fh
.fh_dentry
)
537 return nfserr_restorefh
;
539 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
540 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
541 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
542 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
548 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
551 if (!cstate
->current_fh
.fh_dentry
)
552 return nfserr_nofilehandle
;
554 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
555 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
556 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
557 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
566 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
567 struct nfsd4_access
*access
)
569 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
572 access
->ac_resp_access
= access
->ac_req_access
;
573 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
574 &access
->ac_supported
);
577 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
580 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
583 * This is opaque to client, so no need to byte-swap. Use
584 * __force to keep sparse happy
586 verf
[0] = (__force __be32
)nn
->nfssvc_boot
.tv_sec
;
587 verf
[1] = (__force __be32
)nn
->nfssvc_boot
.tv_usec
;
588 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
592 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
593 struct nfsd4_commit
*commit
)
595 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
596 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
601 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
602 struct nfsd4_create
*create
)
608 fh_init(&resfh
, NFS4_FHSIZE
);
610 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
615 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
620 switch (create
->cr_type
) {
622 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
623 create
->cr_name
, create
->cr_namelen
,
624 create
->cr_data
, &resfh
);
628 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
629 if (MAJOR(rdev
) != create
->cr_specdata1
||
630 MINOR(rdev
) != create
->cr_specdata2
)
632 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
633 create
->cr_name
, create
->cr_namelen
,
634 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
638 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
639 if (MAJOR(rdev
) != create
->cr_specdata1
||
640 MINOR(rdev
) != create
->cr_specdata2
)
642 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
643 create
->cr_name
, create
->cr_namelen
,
644 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
648 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
649 create
->cr_name
, create
->cr_namelen
,
650 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
654 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
655 create
->cr_name
, create
->cr_namelen
,
656 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
660 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
661 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
662 create
->cr_name
, create
->cr_namelen
,
663 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
667 status
= nfserr_badtype
;
673 if (create
->cr_label
.len
)
674 nfsd4_security_inode_setsecctx(&resfh
, &create
->cr_label
, create
->cr_bmval
);
676 if (create
->cr_acl
!= NULL
)
677 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
680 fh_unlock(&cstate
->current_fh
);
681 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
682 fh_dup2(&cstate
->current_fh
, &resfh
);
689 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
690 struct nfsd4_getattr
*getattr
)
694 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
698 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
701 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
702 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
703 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
705 getattr
->ga_fhp
= &cstate
->current_fh
;
710 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
711 struct nfsd4_link
*link
)
713 __be32 status
= nfserr_nofilehandle
;
715 if (!cstate
->save_fh
.fh_dentry
)
717 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
718 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
720 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
724 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
726 struct svc_fh tmp_fh
;
729 fh_init(&tmp_fh
, NFS4_FHSIZE
);
730 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
733 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
738 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
742 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
745 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
749 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
750 struct nfsd4_lookup
*lookup
)
752 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
753 lookup
->lo_name
, lookup
->lo_len
,
754 &cstate
->current_fh
);
758 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
759 struct nfsd4_read
*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 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, &read
->rd_stateid
,
780 RD_STATE
, &read
->rd_filp
, &read
->rd_tmp_file
);
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 (d_really_is_negative(dentry
)) {
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(rqstp
, cstate
,
926 &setattr
->sa_stateid
, WR_STATE
, NULL
, 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 if (write
->wr_offset
>= OFFSET_MAX
)
990 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
, stateid
, WR_STATE
,
993 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
997 cnt
= write
->wr_buflen
;
998 write
->wr_how_written
= write
->wr_stable_how
;
999 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
1001 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
1002 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
1004 status
= nfsd_vfs_write(rqstp
, &cstate
->current_fh
, filp
,
1005 write
->wr_offset
, rqstp
->rq_vec
, nvecs
, &cnt
,
1006 &write
->wr_how_written
);
1009 write
->wr_bytes_written
= cnt
;
1015 nfsd4_fallocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1016 struct nfsd4_fallocate
*fallocate
, int flags
)
1018 __be32 status
= nfserr_notsupp
;
1021 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
,
1022 &fallocate
->falloc_stateid
,
1023 WR_STATE
, &file
, NULL
);
1024 if (status
!= nfs_ok
) {
1025 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1029 status
= nfsd4_vfs_fallocate(rqstp
, &cstate
->current_fh
, file
,
1030 fallocate
->falloc_offset
,
1031 fallocate
->falloc_length
,
1038 nfsd4_allocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1039 struct nfsd4_fallocate
*fallocate
)
1041 return nfsd4_fallocate(rqstp
, cstate
, fallocate
, 0);
1045 nfsd4_deallocate(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1046 struct nfsd4_fallocate
*fallocate
)
1048 return nfsd4_fallocate(rqstp
, cstate
, fallocate
,
1049 FALLOC_FL_PUNCH_HOLE
| FALLOC_FL_KEEP_SIZE
);
1053 nfsd4_seek(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1054 struct nfsd4_seek
*seek
)
1060 status
= nfs4_preprocess_stateid_op(rqstp
, cstate
,
1061 &seek
->seek_stateid
,
1062 RD_STATE
, &file
, NULL
);
1064 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1068 switch (seek
->seek_whence
) {
1069 case NFS4_CONTENT_DATA
:
1072 case NFS4_CONTENT_HOLE
:
1076 status
= nfserr_union_notsupp
;
1081 * Note: This call does change file->f_pos, but nothing in NFSD
1082 * should ever file->f_pos.
1084 seek
->seek_pos
= vfs_llseek(file
, seek
->seek_offset
, whence
);
1085 if (seek
->seek_pos
< 0)
1086 status
= nfserrno(seek
->seek_pos
);
1087 else if (seek
->seek_pos
>= i_size_read(file_inode(file
)))
1088 seek
->seek_eof
= true;
1095 /* This routine never returns NFS_OK! If there are no other errors, it
1096 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1097 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1098 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1101 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1102 struct nfsd4_verify
*verify
)
1108 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
1112 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
1116 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
1117 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
1118 return nfserr_inval
;
1119 if (verify
->ve_attrlen
& 3)
1120 return nfserr_inval
;
1123 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1125 count
= 4 + (verify
->ve_attrlen
>> 2);
1126 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
1128 return nfserr_jukebox
;
1131 status
= nfsd4_encode_fattr_to_buf(&p
, count
, &cstate
->current_fh
,
1132 cstate
->current_fh
.fh_export
,
1133 cstate
->current_fh
.fh_dentry
,
1137 * If nfsd4_encode_fattr() ran out of space, assume that's because
1138 * the attributes are longer (hence different) than those given:
1140 if (status
== nfserr_resource
)
1141 status
= nfserr_not_same
;
1146 p
= buf
+ 1 + ntohl(buf
[0]);
1147 status
= nfserr_not_same
;
1148 if (ntohl(*p
++) != verify
->ve_attrlen
)
1150 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1151 status
= nfserr_same
;
1159 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1160 struct nfsd4_verify
*verify
)
1164 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1165 return status
== nfserr_not_same
? nfs_ok
: status
;
1169 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1170 struct nfsd4_verify
*verify
)
1174 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1175 return status
== nfserr_same
? nfs_ok
: status
;
1178 #ifdef CONFIG_NFSD_PNFS
1179 static const struct nfsd4_layout_ops
*
1180 nfsd4_layout_verify(struct svc_export
*exp
, unsigned int layout_type
)
1182 if (!exp
->ex_layout_type
) {
1183 dprintk("%s: export does not support pNFS\n", __func__
);
1187 if (exp
->ex_layout_type
!= layout_type
) {
1188 dprintk("%s: layout type %d not supported\n",
1189 __func__
, layout_type
);
1193 return nfsd4_layout_ops
[layout_type
];
1197 nfsd4_getdeviceinfo(struct svc_rqst
*rqstp
,
1198 struct nfsd4_compound_state
*cstate
,
1199 struct nfsd4_getdeviceinfo
*gdp
)
1201 const struct nfsd4_layout_ops
*ops
;
1202 struct nfsd4_deviceid_map
*map
;
1203 struct svc_export
*exp
;
1206 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1208 gdp
->gd_layout_type
,
1209 gdp
->gd_devid
.fsid_idx
, gdp
->gd_devid
.generation
,
1212 map
= nfsd4_find_devid_map(gdp
->gd_devid
.fsid_idx
);
1214 dprintk("%s: couldn't find device ID to export mapping!\n",
1216 return nfserr_noent
;
1219 exp
= rqst_exp_find(rqstp
, map
->fsid_type
, map
->fsid
);
1221 dprintk("%s: could not find device id\n", __func__
);
1222 return nfserr_noent
;
1225 nfserr
= nfserr_layoutunavailable
;
1226 ops
= nfsd4_layout_verify(exp
, gdp
->gd_layout_type
);
1231 if (gdp
->gd_maxcount
!= 0)
1232 nfserr
= ops
->proc_getdeviceinfo(exp
->ex_path
.mnt
->mnt_sb
, gdp
);
1234 gdp
->gd_notify_types
&= ops
->notify_types
;
1241 nfsd4_layoutget(struct svc_rqst
*rqstp
,
1242 struct nfsd4_compound_state
*cstate
,
1243 struct nfsd4_layoutget
*lgp
)
1245 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1246 const struct nfsd4_layout_ops
*ops
;
1247 struct nfs4_layout_stateid
*ls
;
1251 switch (lgp
->lg_seg
.iomode
) {
1253 accmode
= NFSD_MAY_READ
;
1256 accmode
= NFSD_MAY_READ
| NFSD_MAY_WRITE
;
1259 dprintk("%s: invalid iomode %d\n",
1260 __func__
, lgp
->lg_seg
.iomode
);
1261 nfserr
= nfserr_badiomode
;
1265 nfserr
= fh_verify(rqstp
, current_fh
, 0, accmode
);
1269 nfserr
= nfserr_layoutunavailable
;
1270 ops
= nfsd4_layout_verify(current_fh
->fh_export
, lgp
->lg_layout_type
);
1275 * Verify minlength and range as per RFC5661:
1276 * o If loga_length is less than loga_minlength,
1277 * the metadata server MUST return NFS4ERR_INVAL.
1278 * o If the sum of loga_offset and loga_minlength exceeds
1279 * NFS4_UINT64_MAX, and loga_minlength is not
1280 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1281 * o If the sum of loga_offset and loga_length exceeds
1282 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1283 * the error NFS4ERR_INVAL MUST result.
1285 nfserr
= nfserr_inval
;
1286 if (lgp
->lg_seg
.length
< lgp
->lg_minlength
||
1287 (lgp
->lg_minlength
!= NFS4_MAX_UINT64
&&
1288 lgp
->lg_minlength
> NFS4_MAX_UINT64
- lgp
->lg_seg
.offset
) ||
1289 (lgp
->lg_seg
.length
!= NFS4_MAX_UINT64
&&
1290 lgp
->lg_seg
.length
> NFS4_MAX_UINT64
- lgp
->lg_seg
.offset
))
1292 if (lgp
->lg_seg
.length
== 0)
1295 nfserr
= nfsd4_preprocess_layout_stateid(rqstp
, cstate
, &lgp
->lg_sid
,
1296 true, lgp
->lg_layout_type
, &ls
);
1298 trace_layout_get_lookup_fail(&lgp
->lg_sid
);
1302 nfserr
= nfserr_recallconflict
;
1303 if (atomic_read(&ls
->ls_stid
.sc_file
->fi_lo_recalls
))
1306 nfserr
= ops
->proc_layoutget(d_inode(current_fh
->fh_dentry
),
1311 nfserr
= nfsd4_insert_layout(lgp
, ls
);
1314 nfs4_put_stid(&ls
->ls_stid
);
1320 nfsd4_layoutcommit(struct svc_rqst
*rqstp
,
1321 struct nfsd4_compound_state
*cstate
,
1322 struct nfsd4_layoutcommit
*lcp
)
1324 const struct nfsd4_layout_seg
*seg
= &lcp
->lc_seg
;
1325 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1326 const struct nfsd4_layout_ops
*ops
;
1327 loff_t new_size
= lcp
->lc_last_wr
+ 1;
1328 struct inode
*inode
;
1329 struct nfs4_layout_stateid
*ls
;
1332 nfserr
= fh_verify(rqstp
, current_fh
, 0, NFSD_MAY_WRITE
);
1336 nfserr
= nfserr_layoutunavailable
;
1337 ops
= nfsd4_layout_verify(current_fh
->fh_export
, lcp
->lc_layout_type
);
1340 inode
= d_inode(current_fh
->fh_dentry
);
1342 nfserr
= nfserr_inval
;
1343 if (new_size
<= seg
->offset
) {
1344 dprintk("pnfsd: last write before layout segment\n");
1347 if (new_size
> seg
->offset
+ seg
->length
) {
1348 dprintk("pnfsd: last write beyond layout segment\n");
1351 if (!lcp
->lc_newoffset
&& new_size
> i_size_read(inode
)) {
1352 dprintk("pnfsd: layoutcommit beyond EOF\n");
1356 nfserr
= nfsd4_preprocess_layout_stateid(rqstp
, cstate
, &lcp
->lc_sid
,
1357 false, lcp
->lc_layout_type
,
1360 trace_layout_commit_lookup_fail(&lcp
->lc_sid
);
1361 /* fixup error code as per RFC5661 */
1362 if (nfserr
== nfserr_bad_stateid
)
1363 nfserr
= nfserr_badlayout
;
1367 nfserr
= ops
->proc_layoutcommit(inode
, lcp
);
1371 if (new_size
> i_size_read(inode
)) {
1372 lcp
->lc_size_chg
= 1;
1373 lcp
->lc_newsize
= new_size
;
1375 lcp
->lc_size_chg
= 0;
1379 nfs4_put_stid(&ls
->ls_stid
);
1385 nfsd4_layoutreturn(struct svc_rqst
*rqstp
,
1386 struct nfsd4_compound_state
*cstate
,
1387 struct nfsd4_layoutreturn
*lrp
)
1389 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1392 nfserr
= fh_verify(rqstp
, current_fh
, 0, NFSD_MAY_NOP
);
1396 nfserr
= nfserr_layoutunavailable
;
1397 if (!nfsd4_layout_verify(current_fh
->fh_export
, lrp
->lr_layout_type
))
1400 switch (lrp
->lr_seg
.iomode
) {
1406 dprintk("%s: invalid iomode %d\n", __func__
,
1407 lrp
->lr_seg
.iomode
);
1408 nfserr
= nfserr_inval
;
1412 switch (lrp
->lr_return_type
) {
1414 nfserr
= nfsd4_return_file_layouts(rqstp
, cstate
, lrp
);
1418 nfserr
= nfsd4_return_client_layouts(rqstp
, cstate
, lrp
);
1421 dprintk("%s: invalid return_type %d\n", __func__
,
1422 lrp
->lr_return_type
);
1423 nfserr
= nfserr_inval
;
1429 #endif /* CONFIG_NFSD_PNFS */
1435 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
1440 static inline void nfsd4_increment_op_stats(u32 opnum
)
1442 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1443 nfsdstats
.nfs4_opcount
[opnum
]++;
1446 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
1448 typedef u32(*nfsd4op_rsize
)(struct svc_rqst
*, struct nfsd4_op
*op
);
1449 typedef void(*stateid_setter
)(struct nfsd4_compound_state
*, void *);
1450 typedef void(*stateid_getter
)(struct nfsd4_compound_state
*, void *);
1452 enum nfsd4_op_flags
{
1453 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
1454 ALLOWED_ON_ABSENT_FS
= 1 << 1, /* ops processed on absent fs */
1455 ALLOWED_AS_FIRST_OP
= 1 << 2, /* ops reqired first in compound */
1456 /* For rfc 5661 section 2.6.3.1.1: */
1457 OP_HANDLES_WRONGSEC
= 1 << 3,
1458 OP_IS_PUTFH_LIKE
= 1 << 4,
1460 * These are the ops whose result size we estimate before
1461 * encoding, to avoid performing an op then not being able to
1462 * respond or cache a response. This includes writes and setattrs
1463 * as well as the operations usually called "nonidempotent":
1465 OP_MODIFIES_SOMETHING
= 1 << 5,
1467 * Cache compounds containing these ops in the xid-based drc:
1468 * We use the DRC for compounds containing non-idempotent
1469 * operations, *except* those that are 4.1-specific (since
1470 * sessions provide their own EOS), and except for stateful
1471 * operations other than setclientid and setclientid_confirm
1472 * (since sequence numbers provide EOS for open, lock, etc in
1475 OP_CACHEME
= 1 << 6,
1477 * These are ops which clear current state id.
1479 OP_CLEAR_STATEID
= 1 << 7,
1482 struct nfsd4_operation
{
1483 nfsd4op_func op_func
;
1486 /* Try to get response size before operation */
1487 nfsd4op_rsize op_rsize_bop
;
1488 stateid_getter op_get_currentstateid
;
1489 stateid_setter op_set_currentstateid
;
1492 static struct nfsd4_operation nfsd4_ops
[];
1494 static const char *nfsd4_op_name(unsigned opnum
);
1497 * Enforce NFSv4.1 COMPOUND ordering rules:
1499 * Also note, enforced elsewhere:
1500 * - SEQUENCE other than as first op results in
1501 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1502 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1503 * (Enforced in nfsd4_bind_conn_to_session().)
1504 * - DESTROY_SESSION must be the final operation in a compound, if
1505 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1506 * (Enforced in nfsd4_destroy_session().)
1508 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1510 struct nfsd4_op
*op
= &args
->ops
[0];
1512 /* These ordering requirements don't apply to NFSv4.0: */
1513 if (args
->minorversion
== 0)
1515 /* This is weird, but OK, not our problem: */
1516 if (args
->opcnt
== 0)
1518 if (op
->status
== nfserr_op_illegal
)
1520 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1521 return nfserr_op_not_in_session
;
1522 if (op
->opnum
== OP_SEQUENCE
)
1524 if (args
->opcnt
!= 1)
1525 return nfserr_not_only_op
;
1529 static inline struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1531 return &nfsd4_ops
[op
->opnum
];
1534 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1536 if (op
->opnum
== OP_ILLEGAL
)
1538 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1541 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1543 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1544 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1545 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1546 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1547 struct nfsd4_operation
*thisd
;
1548 struct nfsd4_operation
*nextd
;
1550 thisd
= OPDESC(this);
1552 * Most ops check wronsec on our own; only the putfh-like ops
1553 * have special rules.
1555 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1558 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1559 * put-filehandle operation if we're not going to use the
1562 if (argp
->opcnt
== resp
->opcnt
)
1564 if (next
->opnum
== OP_ILLEGAL
)
1566 nextd
= OPDESC(next
);
1568 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1569 * errors themselves as necessary; others should check for them
1572 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1575 static void svcxdr_init_encode(struct svc_rqst
*rqstp
,
1576 struct nfsd4_compoundres
*resp
)
1578 struct xdr_stream
*xdr
= &resp
->xdr
;
1579 struct xdr_buf
*buf
= &rqstp
->rq_res
;
1580 struct kvec
*head
= buf
->head
;
1584 xdr
->p
= head
->iov_base
+ head
->iov_len
;
1585 xdr
->end
= head
->iov_base
+ PAGE_SIZE
- rqstp
->rq_auth_slack
;
1586 /* Tail and page_len should be zero at this point: */
1587 buf
->len
= buf
->head
[0].iov_len
;
1588 xdr
->scratch
.iov_len
= 0;
1589 xdr
->page_ptr
= buf
->pages
- 1;
1590 buf
->buflen
= PAGE_SIZE
* (1 + rqstp
->rq_page_end
- buf
->pages
)
1591 - rqstp
->rq_auth_slack
;
1598 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1599 struct nfsd4_compoundargs
*args
,
1600 struct nfsd4_compoundres
*resp
)
1602 struct nfsd4_op
*op
;
1603 struct nfsd4_operation
*opdesc
;
1604 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1605 struct svc_fh
*current_fh
= &cstate
->current_fh
;
1606 struct svc_fh
*save_fh
= &cstate
->save_fh
;
1609 svcxdr_init_encode(rqstp
, resp
);
1610 resp
->tagp
= resp
->xdr
.p
;
1611 /* reserve space for: taglen, tag, and opcnt */
1612 xdr_reserve_space(&resp
->xdr
, 8 + args
->taglen
);
1613 resp
->taglen
= args
->taglen
;
1614 resp
->tag
= args
->tag
;
1615 resp
->rqstp
= rqstp
;
1616 cstate
->minorversion
= args
->minorversion
;
1617 fh_init(current_fh
, NFS4_FHSIZE
);
1618 fh_init(save_fh
, NFS4_FHSIZE
);
1620 * Don't use the deferral mechanism for NFSv4; compounds make it
1621 * too hard to avoid non-idempotency problems.
1623 clear_bit(RQ_USEDEFERRAL
, &rqstp
->rq_flags
);
1626 * According to RFC3010, this takes precedence over all other errors.
1628 status
= nfserr_minor_vers_mismatch
;
1629 if (nfsd_minorversion(args
->minorversion
, NFSD_TEST
) <= 0)
1632 status
= nfs41_check_op_ordering(args
);
1635 op
->status
= status
;
1639 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1640 op
= &args
->ops
[resp
->opcnt
++];
1642 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1643 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1644 nfsd4_op_name(op
->opnum
));
1646 * The XDR decode routines may have pre-set op->status;
1647 * for example, if there is a miscellaneous XDR error
1648 * it will be set to nfserr_bad_xdr.
1651 if (op
->opnum
== OP_OPEN
)
1652 op
->status
= nfsd4_open_omfg(rqstp
, cstate
, op
);
1656 opdesc
= OPDESC(op
);
1658 if (!current_fh
->fh_dentry
) {
1659 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1660 op
->status
= nfserr_nofilehandle
;
1663 } else if (current_fh
->fh_export
->ex_fslocs
.migrated
&&
1664 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1665 op
->status
= nfserr_moved
;
1669 fh_clear_wcc(current_fh
);
1671 /* If op is non-idempotent */
1672 if (opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1674 * Don't execute this op if we couldn't encode a
1677 u32 plen
= opdesc
->op_rsize_bop(rqstp
, op
);
1679 * Plus if there's another operation, make sure
1680 * we'll have space to at least encode an error:
1682 if (resp
->opcnt
< args
->opcnt
)
1683 plen
+= COMPOUND_ERR_SLACK_SPACE
;
1684 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1690 if (opdesc
->op_get_currentstateid
)
1691 opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1692 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1695 if (opdesc
->op_set_currentstateid
)
1696 opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1698 if (opdesc
->op_flags
& OP_CLEAR_STATEID
)
1699 clear_current_stateid(cstate
);
1701 if (need_wrongsec_check(rqstp
))
1702 op
->status
= check_nfsd_access(current_fh
->fh_export
, rqstp
);
1706 /* Only from SEQUENCE */
1707 if (cstate
->status
== nfserr_replay_cache
) {
1708 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1709 status
= op
->status
;
1712 if (op
->status
== nfserr_replay_me
) {
1713 op
->replay
= &cstate
->replay_owner
->so_replay
;
1714 nfsd4_encode_replay(&resp
->xdr
, op
);
1715 status
= op
->status
= op
->replay
->rp_status
;
1717 nfsd4_encode_operation(resp
, op
);
1718 status
= op
->status
;
1721 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1722 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1723 be32_to_cpu(status
));
1725 nfsd4_cstate_clear_replay(cstate
);
1726 nfsd4_increment_op_stats(op
->opnum
);
1729 cstate
->status
= status
;
1732 BUG_ON(cstate
->replay_owner
);
1734 /* Reset deferral mechanism for RPC deferrals */
1735 set_bit(RQ_USEDEFERRAL
, &rqstp
->rq_flags
);
1736 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1740 #define op_encode_hdr_size (2)
1741 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1742 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1743 #define op_encode_change_info_maxsz (5)
1744 #define nfs4_fattr_bitmap_maxsz (4)
1746 /* We'll fall back on returning no lockowner if run out of space: */
1747 #define op_encode_lockowner_maxsz (0)
1748 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1750 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1752 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1753 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1754 op_encode_ace_maxsz)
1756 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1758 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1760 return (op_encode_hdr_size
) * sizeof(__be32
);
1763 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1765 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1768 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1770 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1773 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1775 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1776 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1780 * Note since this is an idempotent operation we won't insist on failing
1781 * the op prematurely if the estimate is too large. We may turn off splice
1782 * reads unnecessarily.
1784 static inline u32
nfsd4_getattr_rsize(struct svc_rqst
*rqstp
,
1785 struct nfsd4_op
*op
)
1787 u32
*bmap
= op
->u
.getattr
.ga_bmval
;
1788 u32 bmap0
= bmap
[0], bmap1
= bmap
[1], bmap2
= bmap
[2];
1791 if (bmap0
& FATTR4_WORD0_ACL
)
1792 return svc_max_payload(rqstp
);
1793 if (bmap0
& FATTR4_WORD0_FS_LOCATIONS
)
1794 return svc_max_payload(rqstp
);
1796 if (bmap1
& FATTR4_WORD1_OWNER
) {
1797 ret
+= IDMAP_NAMESZ
+ 4;
1798 bmap1
&= ~FATTR4_WORD1_OWNER
;
1800 if (bmap1
& FATTR4_WORD1_OWNER_GROUP
) {
1801 ret
+= IDMAP_NAMESZ
+ 4;
1802 bmap1
&= ~FATTR4_WORD1_OWNER_GROUP
;
1804 if (bmap0
& FATTR4_WORD0_FILEHANDLE
) {
1805 ret
+= NFS4_FHSIZE
+ 4;
1806 bmap0
&= ~FATTR4_WORD0_FILEHANDLE
;
1808 if (bmap2
& FATTR4_WORD2_SECURITY_LABEL
) {
1809 ret
+= NFS4_MAXLABELLEN
+ 12;
1810 bmap2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
1813 * Largest of remaining attributes are 16 bytes (e.g.,
1814 * supported_attributes)
1816 ret
+= 16 * (hweight32(bmap0
) + hweight32(bmap1
) + hweight32(bmap2
));
1817 /* bitmask, length */
1822 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1824 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1828 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1830 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1834 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1836 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1837 + op_encode_change_info_maxsz
+ 1
1838 + nfs4_fattr_bitmap_maxsz
1839 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1842 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1844 u32 maxcount
= 0, rlen
= 0;
1846 maxcount
= svc_max_payload(rqstp
);
1847 rlen
= min(op
->u
.read
.rd_length
, maxcount
);
1849 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1852 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1854 u32 maxcount
= 0, rlen
= 0;
1856 maxcount
= svc_max_payload(rqstp
);
1857 rlen
= min(op
->u
.readdir
.rd_maxcount
, maxcount
);
1859 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
+
1860 XDR_QUADLEN(rlen
)) * sizeof(__be32
);
1863 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1865 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1869 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1871 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1872 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1875 static inline u32
nfsd4_sequence_rsize(struct svc_rqst
*rqstp
,
1876 struct nfsd4_op
*op
)
1878 return (op_encode_hdr_size
1879 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + 5) * sizeof(__be32
);
1882 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1884 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1887 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1889 return (op_encode_hdr_size
+ 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE
)) *
1893 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1895 return (op_encode_hdr_size
+ 2 + op_encode_verifier_maxsz
) * sizeof(__be32
);
1898 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1900 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
1901 1 + 1 + /* eir_flags, spr_how */\
1902 4 + /* spo_must_enforce & _allow with bitmap */\
1903 2 + /*eir_server_owner.so_minor_id */\
1904 /* eir_server_owner.so_major_id<> */\
1905 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1906 /* eir_server_scope<> */\
1907 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1908 1 + /* eir_server_impl_id array length */\
1909 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
1912 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1914 return (op_encode_hdr_size
+ \
1915 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
1916 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
1919 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1921 return (op_encode_hdr_size
+ \
1922 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
1923 2 + /* csr_sequence, csr_flags */\
1924 op_encode_channel_attrs_maxsz
+ \
1925 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
1928 #ifdef CONFIG_NFSD_PNFS
1930 * At this stage we don't really know what layout driver will handle the request,
1931 * so we need to define an arbitrary upper bound here.
1933 #define MAX_LAYOUT_SIZE 128
1934 static inline u32
nfsd4_layoutget_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1936 return (op_encode_hdr_size
+
1937 1 /* logr_return_on_close */ +
1938 op_encode_stateid_maxsz
+
1939 1 /* nr of layouts */ +
1940 MAX_LAYOUT_SIZE
) * sizeof(__be32
);
1943 static inline u32
nfsd4_layoutcommit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1945 return (op_encode_hdr_size
+
1946 1 /* locr_newsize */ +
1947 2 /* ns_size */) * sizeof(__be32
);
1950 static inline u32
nfsd4_layoutreturn_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1952 return (op_encode_hdr_size
+
1953 1 /* lrs_stateid */ +
1954 op_encode_stateid_maxsz
) * sizeof(__be32
);
1956 #endif /* CONFIG_NFSD_PNFS */
1958 static struct nfsd4_operation nfsd4_ops
[] = {
1960 .op_func
= (nfsd4op_func
)nfsd4_access
,
1961 .op_name
= "OP_ACCESS",
1964 .op_func
= (nfsd4op_func
)nfsd4_close
,
1965 .op_flags
= OP_MODIFIES_SOMETHING
,
1966 .op_name
= "OP_CLOSE",
1967 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1968 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_closestateid
,
1969 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_closestateid
,
1972 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1973 .op_flags
= OP_MODIFIES_SOMETHING
,
1974 .op_name
= "OP_COMMIT",
1975 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_commit_rsize
,
1978 .op_func
= (nfsd4op_func
)nfsd4_create
,
1979 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
1980 .op_name
= "OP_CREATE",
1981 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_rsize
,
1983 [OP_DELEGRETURN
] = {
1984 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1985 .op_flags
= OP_MODIFIES_SOMETHING
,
1986 .op_name
= "OP_DELEGRETURN",
1987 .op_rsize_bop
= nfsd4_only_status_rsize
,
1988 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_delegreturnstateid
,
1991 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1992 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1993 .op_rsize_bop
= nfsd4_getattr_rsize
,
1994 .op_name
= "OP_GETATTR",
1997 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1998 .op_name
= "OP_GETFH",
2001 .op_func
= (nfsd4op_func
)nfsd4_link
,
2002 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
2004 .op_name
= "OP_LINK",
2005 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_link_rsize
,
2008 .op_func
= (nfsd4op_func
)nfsd4_lock
,
2009 .op_flags
= OP_MODIFIES_SOMETHING
,
2010 .op_name
= "OP_LOCK",
2011 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_lock_rsize
,
2012 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_lockstateid
,
2015 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
2016 .op_name
= "OP_LOCKT",
2019 .op_func
= (nfsd4op_func
)nfsd4_locku
,
2020 .op_flags
= OP_MODIFIES_SOMETHING
,
2021 .op_name
= "OP_LOCKU",
2022 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
2023 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_lockustateid
,
2026 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
2027 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
2028 .op_name
= "OP_LOOKUP",
2031 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
2032 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
2033 .op_name
= "OP_LOOKUPP",
2036 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
2037 .op_name
= "OP_NVERIFY",
2040 .op_func
= (nfsd4op_func
)nfsd4_open
,
2041 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
2042 .op_name
= "OP_OPEN",
2043 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_open_rsize
,
2044 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_openstateid
,
2046 [OP_OPEN_CONFIRM
] = {
2047 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
2048 .op_flags
= OP_MODIFIES_SOMETHING
,
2049 .op_name
= "OP_OPEN_CONFIRM",
2050 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
2052 [OP_OPEN_DOWNGRADE
] = {
2053 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
2054 .op_flags
= OP_MODIFIES_SOMETHING
,
2055 .op_name
= "OP_OPEN_DOWNGRADE",
2056 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
2057 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_opendowngradestateid
,
2058 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_opendowngradestateid
,
2061 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
2062 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2063 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
2064 .op_name
= "OP_PUTFH",
2065 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2068 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
2069 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2070 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
2071 .op_name
= "OP_PUTPUBFH",
2072 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2075 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
2076 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2077 | OP_IS_PUTFH_LIKE
| OP_CLEAR_STATEID
,
2078 .op_name
= "OP_PUTROOTFH",
2079 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2082 .op_func
= (nfsd4op_func
)nfsd4_read
,
2083 .op_name
= "OP_READ",
2084 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_read_rsize
,
2085 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_readstateid
,
2088 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
2089 .op_name
= "OP_READDIR",
2090 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_readdir_rsize
,
2093 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
2094 .op_name
= "OP_READLINK",
2097 .op_func
= (nfsd4op_func
)nfsd4_remove
,
2098 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2099 .op_name
= "OP_REMOVE",
2100 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_remove_rsize
,
2103 .op_func
= (nfsd4op_func
)nfsd4_rename
,
2104 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2105 .op_name
= "OP_RENAME",
2106 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_rename_rsize
,
2109 .op_func
= (nfsd4op_func
)nfsd4_renew
,
2110 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2111 | OP_MODIFIES_SOMETHING
,
2112 .op_name
= "OP_RENEW",
2113 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2117 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
2118 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2119 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
2120 .op_name
= "OP_RESTOREFH",
2121 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2124 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
2125 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
2126 .op_name
= "OP_SAVEFH",
2127 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2130 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
2131 .op_flags
= OP_HANDLES_WRONGSEC
,
2132 .op_name
= "OP_SECINFO",
2135 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
2136 .op_name
= "OP_SETATTR",
2137 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2138 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setattr_rsize
,
2139 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_setattrstateid
,
2141 [OP_SETCLIENTID
] = {
2142 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
2143 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2144 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2145 .op_name
= "OP_SETCLIENTID",
2146 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setclientid_rsize
,
2148 [OP_SETCLIENTID_CONFIRM
] = {
2149 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
2150 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2151 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2152 .op_name
= "OP_SETCLIENTID_CONFIRM",
2153 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2156 .op_func
= (nfsd4op_func
)nfsd4_verify
,
2157 .op_name
= "OP_VERIFY",
2160 .op_func
= (nfsd4op_func
)nfsd4_write
,
2161 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2162 .op_name
= "OP_WRITE",
2163 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
2164 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_writestateid
,
2166 [OP_RELEASE_LOCKOWNER
] = {
2167 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
2168 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
2169 | OP_MODIFIES_SOMETHING
,
2170 .op_name
= "OP_RELEASE_LOCKOWNER",
2171 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2174 /* NFSv4.1 operations */
2175 [OP_EXCHANGE_ID
] = {
2176 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
2177 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2178 | OP_MODIFIES_SOMETHING
,
2179 .op_name
= "OP_EXCHANGE_ID",
2180 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_exchange_id_rsize
,
2182 [OP_BACKCHANNEL_CTL
] = {
2183 .op_func
= (nfsd4op_func
)nfsd4_backchannel_ctl
,
2184 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
2185 .op_name
= "OP_BACKCHANNEL_CTL",
2186 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2188 [OP_BIND_CONN_TO_SESSION
] = {
2189 .op_func
= (nfsd4op_func
)nfsd4_bind_conn_to_session
,
2190 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2191 | OP_MODIFIES_SOMETHING
,
2192 .op_name
= "OP_BIND_CONN_TO_SESSION",
2193 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_bind_conn_to_session_rsize
,
2195 [OP_CREATE_SESSION
] = {
2196 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
2197 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2198 | OP_MODIFIES_SOMETHING
,
2199 .op_name
= "OP_CREATE_SESSION",
2200 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_session_rsize
,
2202 [OP_DESTROY_SESSION
] = {
2203 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
2204 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2205 | OP_MODIFIES_SOMETHING
,
2206 .op_name
= "OP_DESTROY_SESSION",
2207 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2210 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
2211 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
2212 .op_name
= "OP_SEQUENCE",
2213 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_sequence_rsize
,
2215 [OP_DESTROY_CLIENTID
] = {
2216 .op_func
= (nfsd4op_func
)nfsd4_destroy_clientid
,
2217 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
2218 | OP_MODIFIES_SOMETHING
,
2219 .op_name
= "OP_DESTROY_CLIENTID",
2220 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2222 [OP_RECLAIM_COMPLETE
] = {
2223 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
2224 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
2225 .op_name
= "OP_RECLAIM_COMPLETE",
2226 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2228 [OP_SECINFO_NO_NAME
] = {
2229 .op_func
= (nfsd4op_func
)nfsd4_secinfo_no_name
,
2230 .op_flags
= OP_HANDLES_WRONGSEC
,
2231 .op_name
= "OP_SECINFO_NO_NAME",
2233 [OP_TEST_STATEID
] = {
2234 .op_func
= (nfsd4op_func
)nfsd4_test_stateid
,
2235 .op_flags
= ALLOWED_WITHOUT_FH
,
2236 .op_name
= "OP_TEST_STATEID",
2238 [OP_FREE_STATEID
] = {
2239 .op_func
= (nfsd4op_func
)nfsd4_free_stateid
,
2240 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
2241 .op_name
= "OP_FREE_STATEID",
2242 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_freestateid
,
2243 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2245 #ifdef CONFIG_NFSD_PNFS
2246 [OP_GETDEVICEINFO
] = {
2247 .op_func
= (nfsd4op_func
)nfsd4_getdeviceinfo
,
2248 .op_flags
= ALLOWED_WITHOUT_FH
,
2249 .op_name
= "OP_GETDEVICEINFO",
2252 .op_func
= (nfsd4op_func
)nfsd4_layoutget
,
2253 .op_flags
= OP_MODIFIES_SOMETHING
,
2254 .op_name
= "OP_LAYOUTGET",
2255 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_layoutget_rsize
,
2257 [OP_LAYOUTCOMMIT
] = {
2258 .op_func
= (nfsd4op_func
)nfsd4_layoutcommit
,
2259 .op_flags
= OP_MODIFIES_SOMETHING
,
2260 .op_name
= "OP_LAYOUTCOMMIT",
2261 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_layoutcommit_rsize
,
2263 [OP_LAYOUTRETURN
] = {
2264 .op_func
= (nfsd4op_func
)nfsd4_layoutreturn
,
2265 .op_flags
= OP_MODIFIES_SOMETHING
,
2266 .op_name
= "OP_LAYOUTRETURN",
2267 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_layoutreturn_rsize
,
2269 #endif /* CONFIG_NFSD_PNFS */
2271 /* NFSv4.2 operations */
2273 .op_func
= (nfsd4op_func
)nfsd4_allocate
,
2274 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2275 .op_name
= "OP_ALLOCATE",
2276 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2279 .op_func
= (nfsd4op_func
)nfsd4_deallocate
,
2280 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
2281 .op_name
= "OP_DEALLOCATE",
2282 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
2285 .op_func
= (nfsd4op_func
)nfsd4_seek
,
2286 .op_name
= "OP_SEEK",
2290 int nfsd4_max_reply(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
2292 struct nfsd4_operation
*opdesc
;
2293 nfsd4op_rsize estimator
;
2295 if (op
->opnum
== OP_ILLEGAL
)
2296 return op_encode_hdr_size
* sizeof(__be32
);
2297 opdesc
= OPDESC(op
);
2298 estimator
= opdesc
->op_rsize_bop
;
2299 return estimator
? estimator(rqstp
, op
) : PAGE_SIZE
;
2302 void warn_on_nonidempotent_op(struct nfsd4_op
*op
)
2304 if (OPDESC(op
)->op_flags
& OP_MODIFIES_SOMETHING
) {
2305 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2306 op
->opnum
, nfsd4_op_name(op
->opnum
));
2311 static const char *nfsd4_op_name(unsigned opnum
)
2313 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
2314 return nfsd4_ops
[opnum
].op_name
;
2315 return "unknown_operation";
2318 #define nfsd4_voidres nfsd4_voidargs
2319 struct nfsd4_voidargs
{ int dummy
; };
2321 static struct svc_procedure nfsd_procedures4
[2] = {
2323 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
2324 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
2325 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
2326 .pc_ressize
= sizeof(struct nfsd4_voidres
),
2327 .pc_cachetype
= RC_NOCACHE
,
2330 [NFSPROC4_COMPOUND
] = {
2331 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
2332 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
2333 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
2334 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
2335 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
2336 .pc_release
= nfsd4_release_compoundargs
,
2337 .pc_cachetype
= RC_NOCACHE
,
2338 .pc_xdrressize
= NFSD_BUFSIZE
/4,
2342 struct svc_version nfsd_version4
= {
2345 .vs_proc
= nfsd_procedures4
,
2346 .vs_dispatch
= nfsd_dispatch
,
2347 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,