2 * Server-side procedures for NFSv4.
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
36 #include <linux/slab.h>
42 #include "current_stateid.h"
45 #define NFSDDBG_FACILITY NFSDDBG_PROC
47 static u32 nfsd_attrmask
[] = {
48 NFSD_WRITEABLE_ATTRS_WORD0
,
49 NFSD_WRITEABLE_ATTRS_WORD1
,
50 NFSD_WRITEABLE_ATTRS_WORD2
53 static u32 nfsd41_ex_attrmask
[] = {
54 NFSD_SUPPATTR_EXCLCREAT_WORD0
,
55 NFSD_SUPPATTR_EXCLCREAT_WORD1
,
56 NFSD_SUPPATTR_EXCLCREAT_WORD2
60 check_attr_support(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
61 u32
*bmval
, u32
*writable
)
63 struct dentry
*dentry
= cstate
->current_fh
.fh_dentry
;
66 * Check about attributes are supported by the NFSv4 server or not.
67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
69 if ((bmval
[0] & ~nfsd_suppattrs0(cstate
->minorversion
)) ||
70 (bmval
[1] & ~nfsd_suppattrs1(cstate
->minorversion
)) ||
71 (bmval
[2] & ~nfsd_suppattrs2(cstate
->minorversion
)))
72 return nfserr_attrnotsupp
;
75 * Check FATTR4_WORD0_ACL can be supported
76 * in current environment or not.
78 if (bmval
[0] & FATTR4_WORD0_ACL
) {
79 if (!IS_POSIXACL(dentry
->d_inode
))
80 return nfserr_attrnotsupp
;
84 * According to spec, read-only attributes return ERR_INVAL.
87 if ((bmval
[0] & ~writable
[0]) || (bmval
[1] & ~writable
[1]) ||
88 (bmval
[2] & ~writable
[2]))
96 nfsd4_check_open_attributes(struct svc_rqst
*rqstp
,
97 struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
99 __be32 status
= nfs_ok
;
101 if (open
->op_create
== NFS4_OPEN_CREATE
) {
102 if (open
->op_createmode
== NFS4_CREATE_UNCHECKED
103 || open
->op_createmode
== NFS4_CREATE_GUARDED
)
104 status
= check_attr_support(rqstp
, cstate
,
105 open
->op_bmval
, nfsd_attrmask
);
106 else if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
)
107 status
= check_attr_support(rqstp
, cstate
,
108 open
->op_bmval
, nfsd41_ex_attrmask
);
115 is_create_with_attrs(struct nfsd4_open
*open
)
117 return open
->op_create
== NFS4_OPEN_CREATE
118 && (open
->op_createmode
== NFS4_CREATE_UNCHECKED
119 || open
->op_createmode
== NFS4_CREATE_GUARDED
120 || open
->op_createmode
== NFS4_CREATE_EXCLUSIVE4_1
);
124 * if error occurs when setting the acl, just clear the acl bit
125 * in the returned attr bitmap.
128 do_set_nfs4_acl(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
,
129 struct nfs4_acl
*acl
, u32
*bmval
)
133 status
= nfsd4_set_nfs4_acl(rqstp
, fhp
, acl
);
136 * We should probably fail the whole open at this point,
137 * but we've already created the file, so it's too late;
138 * So this seems the least of evils:
140 bmval
[0] &= ~FATTR4_WORD0_ACL
;
144 fh_dup2(struct svc_fh
*dst
, struct svc_fh
*src
)
147 dget(src
->fh_dentry
);
149 cache_get(&src
->fh_export
->h
);
154 do_open_permission(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
, int accmode
)
158 if (open
->op_truncate
&&
159 !(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
162 accmode
|= NFSD_MAY_READ_IF_EXEC
;
164 if (open
->op_share_access
& NFS4_SHARE_ACCESS_READ
)
165 accmode
|= NFSD_MAY_READ
;
166 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
167 accmode
|= (NFSD_MAY_WRITE
| NFSD_MAY_TRUNC
);
168 if (open
->op_share_deny
& NFS4_SHARE_DENY_READ
)
169 accmode
|= NFSD_MAY_WRITE
;
171 status
= fh_verify(rqstp
, current_fh
, S_IFREG
, accmode
);
176 static __be32
nfsd_check_obj_isreg(struct svc_fh
*fh
)
178 umode_t mode
= fh
->fh_dentry
->d_inode
->i_mode
;
185 * Using err_symlink as our catch-all case may look odd; but
186 * there's no other obvious error for this case in 4.0, and we
187 * happen to know that it will cause the linux v4 client to do
188 * the right thing on attempts to open something other than a
191 return nfserr_symlink
;
195 do_open_lookup(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
197 struct svc_fh
*resfh
;
201 resfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
203 return nfserr_jukebox
;
204 fh_init(resfh
, NFS4_FHSIZE
);
205 open
->op_truncate
= 0;
207 if (open
->op_create
) {
208 /* FIXME: check session persistence and pnfs flags.
209 * The nfsv4.1 spec requires the following semantics:
211 * Persistent | pNFS | Server REQUIRED | Client Allowed
212 * Reply Cache | server | |
213 * -------------+--------+-----------------+--------------------
214 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
216 * | | and EXCLUSIVE4 | or EXCLUSIVE4
218 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
219 * yes | no | GUARDED4 | GUARDED4
220 * yes | yes | GUARDED4 | GUARDED4
224 * Note: create modes (UNCHECKED,GUARDED...) are the same
225 * in NFSv4 as in v3 except EXCLUSIVE4_1.
227 status
= do_nfsd_create(rqstp
, current_fh
, open
->op_fname
.data
,
228 open
->op_fname
.len
, &open
->op_iattr
,
229 resfh
, open
->op_createmode
,
230 (u32
*)open
->op_verf
.data
,
231 &open
->op_truncate
, &open
->op_created
);
234 * Following rfc 3530 14.2.16, use the returned bitmask
235 * to indicate which attributes we used to store the
238 if (open
->op_createmode
== NFS4_CREATE_EXCLUSIVE
&& status
== 0)
239 open
->op_bmval
[1] = (FATTR4_WORD1_TIME_ACCESS
|
240 FATTR4_WORD1_TIME_MODIFY
);
242 status
= nfsd_lookup(rqstp
, current_fh
,
243 open
->op_fname
.data
, open
->op_fname
.len
, resfh
);
244 fh_unlock(current_fh
);
248 status
= nfsd_check_obj_isreg(resfh
);
252 if (is_create_with_attrs(open
) && open
->op_acl
!= NULL
)
253 do_set_nfs4_acl(rqstp
, resfh
, open
->op_acl
, open
->op_bmval
);
255 /* set reply cache */
256 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
258 accmode
= NFSD_MAY_NOP
;
259 if (open
->op_created
)
260 accmode
|= NFSD_MAY_OWNER_OVERRIDE
;
261 status
= do_open_permission(rqstp
, resfh
, open
, accmode
);
262 set_change_info(&open
->op_cinfo
, current_fh
);
263 fh_dup2(current_fh
, resfh
);
271 do_open_fhandle(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
275 /* We don't know the target directory, and therefore can not
276 * set the change info
279 memset(&open
->op_cinfo
, 0, sizeof(struct nfsd4_change_info
));
281 /* set replay cache */
282 fh_copy_shallow(&open
->op_openowner
->oo_owner
.so_replay
.rp_openfh
,
283 ¤t_fh
->fh_handle
);
285 open
->op_truncate
= (open
->op_iattr
.ia_valid
& ATTR_SIZE
) &&
286 (open
->op_iattr
.ia_size
== 0);
288 status
= do_open_permission(rqstp
, current_fh
, open
,
289 NFSD_MAY_OWNER_OVERRIDE
);
295 copy_clientid(clientid_t
*clid
, struct nfsd4_session
*session
)
297 struct nfsd4_sessionid
*sid
=
298 (struct nfsd4_sessionid
*)session
->se_sessionid
.data
;
300 clid
->cl_boot
= sid
->clientid
.cl_boot
;
301 clid
->cl_id
= sid
->clientid
.cl_id
;
305 nfsd4_open(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
306 struct nfsd4_open
*open
)
309 struct nfsd4_compoundres
*resp
;
310 struct net
*net
= SVC_NET(rqstp
);
311 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
313 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
314 (int)open
->op_fname
.len
, open
->op_fname
.data
,
317 /* This check required by spec. */
318 if (open
->op_create
&& open
->op_claim_type
!= NFS4_OPEN_CLAIM_NULL
)
321 open
->op_created
= 0;
324 * Before RECLAIM_COMPLETE done, server should deny new lock
326 if (nfsd4_has_session(cstate
) &&
327 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
328 &cstate
->session
->se_client
->cl_flags
) &&
329 open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
332 if (nfsd4_has_session(cstate
))
333 copy_clientid(&open
->op_clientid
, cstate
->session
);
337 /* check seqid for replay. set nfs4_owner */
338 resp
= rqstp
->rq_resp
;
339 status
= nfsd4_process_open1(&resp
->cstate
, open
, nn
);
340 if (status
== nfserr_replay_me
) {
341 struct nfs4_replay
*rp
= &open
->op_openowner
->oo_owner
.so_replay
;
342 fh_put(&cstate
->current_fh
);
343 fh_copy_shallow(&cstate
->current_fh
.fh_handle
,
345 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
347 dprintk("nfsd4_open: replay failed"
348 " restoring previous filehandle\n");
350 status
= nfserr_replay_me
;
355 status
= nfsd4_check_open_attributes(rqstp
, cstate
, open
);
359 /* Openowner is now set, so sequence id will get bumped. Now we need
360 * these checks before we do any creates: */
361 status
= nfserr_grace
;
362 if (locks_in_grace(net
) && open
->op_claim_type
!= NFS4_OPEN_CLAIM_PREVIOUS
)
364 status
= nfserr_no_grace
;
365 if (!locks_in_grace(net
) && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
368 switch (open
->op_claim_type
) {
369 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
370 case NFS4_OPEN_CLAIM_NULL
:
371 status
= do_open_lookup(rqstp
, &cstate
->current_fh
,
376 case NFS4_OPEN_CLAIM_PREVIOUS
:
377 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
378 status
= nfs4_check_open_reclaim(&open
->op_clientid
,
379 cstate
->minorversion
,
383 case NFS4_OPEN_CLAIM_FH
:
384 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
385 status
= do_open_fhandle(rqstp
, &cstate
->current_fh
,
390 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
391 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
392 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
393 dprintk("NFSD: unsupported OPEN claim type %d\n",
394 open
->op_claim_type
);
395 status
= nfserr_notsupp
;
398 dprintk("NFSD: Invalid OPEN claim type %d\n",
399 open
->op_claim_type
);
400 status
= nfserr_inval
;
404 * nfsd4_process_open2() does the actual opening of the file. If
405 * successful, it (1) truncates the file if open->op_truncate was
406 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
408 status
= nfsd4_process_open2(rqstp
, &cstate
->current_fh
, open
);
409 WARN_ON(status
&& open
->op_created
);
411 nfsd4_cleanup_open_state(open
, status
);
412 if (open
->op_openowner
)
413 cstate
->replay_owner
= &open
->op_openowner
->oo_owner
;
420 * filehandle-manipulating ops.
423 nfsd4_getfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
424 struct svc_fh
**getfh
)
426 if (!cstate
->current_fh
.fh_dentry
)
427 return nfserr_nofilehandle
;
429 *getfh
= &cstate
->current_fh
;
434 nfsd4_putfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
435 struct nfsd4_putfh
*putfh
)
437 fh_put(&cstate
->current_fh
);
438 cstate
->current_fh
.fh_handle
.fh_size
= putfh
->pf_fhlen
;
439 memcpy(&cstate
->current_fh
.fh_handle
.fh_base
, putfh
->pf_fhval
,
441 return fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_BYPASS_GSS
);
445 nfsd4_putrootfh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
450 fh_put(&cstate
->current_fh
);
451 status
= exp_pseudoroot(rqstp
, &cstate
->current_fh
);
456 nfsd4_restorefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
459 if (!cstate
->save_fh
.fh_dentry
)
460 return nfserr_restorefh
;
462 fh_dup2(&cstate
->current_fh
, &cstate
->save_fh
);
463 if (HAS_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
)) {
464 memcpy(&cstate
->current_stateid
, &cstate
->save_stateid
, sizeof(stateid_t
));
465 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
471 nfsd4_savefh(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
474 if (!cstate
->current_fh
.fh_dentry
)
475 return nfserr_nofilehandle
;
477 fh_dup2(&cstate
->save_fh
, &cstate
->current_fh
);
478 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
)) {
479 memcpy(&cstate
->save_stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
480 SET_STATE_ID(cstate
, SAVED_STATE_ID_FLAG
);
489 nfsd4_access(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
490 struct nfsd4_access
*access
)
492 if (access
->ac_req_access
& ~NFS3_ACCESS_FULL
)
495 access
->ac_resp_access
= access
->ac_req_access
;
496 return nfsd_access(rqstp
, &cstate
->current_fh
, &access
->ac_resp_access
,
497 &access
->ac_supported
);
500 static void gen_boot_verifier(nfs4_verifier
*verifier
, struct net
*net
)
503 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
505 verf
[0] = (__be32
)nn
->nfssvc_boot
.tv_sec
;
506 verf
[1] = (__be32
)nn
->nfssvc_boot
.tv_usec
;
507 memcpy(verifier
->data
, verf
, sizeof(verifier
->data
));
511 nfsd4_commit(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
512 struct nfsd4_commit
*commit
)
514 gen_boot_verifier(&commit
->co_verf
, SVC_NET(rqstp
));
515 return nfsd_commit(rqstp
, &cstate
->current_fh
, commit
->co_offset
,
520 nfsd4_create(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
521 struct nfsd4_create
*create
)
527 fh_init(&resfh
, NFS4_FHSIZE
);
529 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
,
534 status
= check_attr_support(rqstp
, cstate
, create
->cr_bmval
,
539 switch (create
->cr_type
) {
541 /* ugh! we have to null-terminate the linktext, or
542 * vfs_symlink() will choke. it is always safe to
543 * null-terminate by brute force, since at worst we
544 * will overwrite the first byte of the create namelen
545 * in the XDR buffer, which has already been extracted
548 create
->cr_linkname
[create
->cr_linklen
] = 0;
550 status
= nfsd_symlink(rqstp
, &cstate
->current_fh
,
551 create
->cr_name
, create
->cr_namelen
,
552 create
->cr_linkname
, create
->cr_linklen
,
553 &resfh
, &create
->cr_iattr
);
557 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
558 if (MAJOR(rdev
) != create
->cr_specdata1
||
559 MINOR(rdev
) != create
->cr_specdata2
)
561 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
562 create
->cr_name
, create
->cr_namelen
,
563 &create
->cr_iattr
, S_IFBLK
, rdev
, &resfh
);
567 rdev
= MKDEV(create
->cr_specdata1
, create
->cr_specdata2
);
568 if (MAJOR(rdev
) != create
->cr_specdata1
||
569 MINOR(rdev
) != create
->cr_specdata2
)
571 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
572 create
->cr_name
, create
->cr_namelen
,
573 &create
->cr_iattr
,S_IFCHR
, rdev
, &resfh
);
577 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
578 create
->cr_name
, create
->cr_namelen
,
579 &create
->cr_iattr
, S_IFSOCK
, 0, &resfh
);
583 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
584 create
->cr_name
, create
->cr_namelen
,
585 &create
->cr_iattr
, S_IFIFO
, 0, &resfh
);
589 create
->cr_iattr
.ia_valid
&= ~ATTR_SIZE
;
590 status
= nfsd_create(rqstp
, &cstate
->current_fh
,
591 create
->cr_name
, create
->cr_namelen
,
592 &create
->cr_iattr
, S_IFDIR
, 0, &resfh
);
596 status
= nfserr_badtype
;
602 if (create
->cr_acl
!= NULL
)
603 do_set_nfs4_acl(rqstp
, &resfh
, create
->cr_acl
,
606 fh_unlock(&cstate
->current_fh
);
607 set_change_info(&create
->cr_cinfo
, &cstate
->current_fh
);
608 fh_dup2(&cstate
->current_fh
, &resfh
);
615 nfsd4_getattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
616 struct nfsd4_getattr
*getattr
)
620 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
624 if (getattr
->ga_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
627 getattr
->ga_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
628 getattr
->ga_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
629 getattr
->ga_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
631 getattr
->ga_fhp
= &cstate
->current_fh
;
636 nfsd4_link(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
637 struct nfsd4_link
*link
)
639 __be32 status
= nfserr_nofilehandle
;
641 if (!cstate
->save_fh
.fh_dentry
)
643 status
= nfsd_link(rqstp
, &cstate
->current_fh
,
644 link
->li_name
, link
->li_namelen
, &cstate
->save_fh
);
646 set_change_info(&link
->li_cinfo
, &cstate
->current_fh
);
650 static __be32
nfsd4_do_lookupp(struct svc_rqst
*rqstp
, struct svc_fh
*fh
)
652 struct svc_fh tmp_fh
;
655 fh_init(&tmp_fh
, NFS4_FHSIZE
);
656 ret
= exp_pseudoroot(rqstp
, &tmp_fh
);
659 if (tmp_fh
.fh_dentry
== fh
->fh_dentry
) {
664 return nfsd_lookup(rqstp
, fh
, "..", 2, fh
);
668 nfsd4_lookupp(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
671 return nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
675 nfsd4_lookup(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
676 struct nfsd4_lookup
*lookup
)
678 return nfsd_lookup(rqstp
, &cstate
->current_fh
,
679 lookup
->lo_name
, lookup
->lo_len
,
680 &cstate
->current_fh
);
684 nfsd4_read(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
685 struct nfsd4_read
*read
)
689 /* no need to check permission - this will be done in nfsd_read() */
691 read
->rd_filp
= NULL
;
692 if (read
->rd_offset
>= OFFSET_MAX
)
696 * If we do a zero copy read, then a client will see read data
697 * that reflects the state of the file *after* performing the
698 * following compound.
700 * To ensure proper ordering, we therefore turn off zero copy if
701 * the client wants us to do more in this compound:
703 if (!nfsd4_last_compound_op(rqstp
))
704 rqstp
->rq_splice_ok
= false;
708 if ((status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
709 cstate
, &read
->rd_stateid
,
710 RD_STATE
, &read
->rd_filp
))) {
711 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
715 get_file(read
->rd_filp
);
719 read
->rd_rqstp
= rqstp
;
720 read
->rd_fhp
= &cstate
->current_fh
;
725 nfsd4_readdir(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
726 struct nfsd4_readdir
*readdir
)
728 u64 cookie
= readdir
->rd_cookie
;
729 static const nfs4_verifier zeroverf
;
731 /* no need to check permission - this will be done in nfsd_readdir() */
733 if (readdir
->rd_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
)
736 readdir
->rd_bmval
[0] &= nfsd_suppattrs0(cstate
->minorversion
);
737 readdir
->rd_bmval
[1] &= nfsd_suppattrs1(cstate
->minorversion
);
738 readdir
->rd_bmval
[2] &= nfsd_suppattrs2(cstate
->minorversion
);
740 if ((cookie
== 1) || (cookie
== 2) ||
741 (cookie
== 0 && memcmp(readdir
->rd_verf
.data
, zeroverf
.data
, NFS4_VERIFIER_SIZE
)))
742 return nfserr_bad_cookie
;
744 readdir
->rd_rqstp
= rqstp
;
745 readdir
->rd_fhp
= &cstate
->current_fh
;
750 nfsd4_readlink(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
751 struct nfsd4_readlink
*readlink
)
753 readlink
->rl_rqstp
= rqstp
;
754 readlink
->rl_fhp
= &cstate
->current_fh
;
759 nfsd4_remove(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
760 struct nfsd4_remove
*remove
)
764 if (locks_in_grace(SVC_NET(rqstp
)))
766 status
= nfsd_unlink(rqstp
, &cstate
->current_fh
, 0,
767 remove
->rm_name
, remove
->rm_namelen
);
769 fh_unlock(&cstate
->current_fh
);
770 set_change_info(&remove
->rm_cinfo
, &cstate
->current_fh
);
776 nfsd4_rename(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
777 struct nfsd4_rename
*rename
)
779 __be32 status
= nfserr_nofilehandle
;
781 if (!cstate
->save_fh
.fh_dentry
)
783 if (locks_in_grace(SVC_NET(rqstp
)) &&
784 !(cstate
->save_fh
.fh_export
->ex_flags
& NFSEXP_NOSUBTREECHECK
))
786 status
= nfsd_rename(rqstp
, &cstate
->save_fh
, rename
->rn_sname
,
787 rename
->rn_snamelen
, &cstate
->current_fh
,
788 rename
->rn_tname
, rename
->rn_tnamelen
);
790 /* the underlying filesystem returns different error's than required
791 * by NFSv4. both save_fh and current_fh have been verified.. */
792 if (status
== nfserr_isdir
)
793 status
= nfserr_exist
;
794 else if ((status
== nfserr_notdir
) &&
795 (S_ISDIR(cstate
->save_fh
.fh_dentry
->d_inode
->i_mode
) &&
796 S_ISDIR(cstate
->current_fh
.fh_dentry
->d_inode
->i_mode
)))
797 status
= nfserr_exist
;
800 set_change_info(&rename
->rn_sinfo
, &cstate
->current_fh
);
801 set_change_info(&rename
->rn_tinfo
, &cstate
->save_fh
);
807 nfsd4_secinfo(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
808 struct nfsd4_secinfo
*secinfo
)
811 struct svc_export
*exp
;
812 struct dentry
*dentry
;
815 fh_init(&resfh
, NFS4_FHSIZE
);
816 err
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFDIR
, NFSD_MAY_EXEC
);
819 err
= nfsd_lookup_dentry(rqstp
, &cstate
->current_fh
,
820 secinfo
->si_name
, secinfo
->si_namelen
,
824 if (dentry
->d_inode
== NULL
) {
828 secinfo
->si_exp
= exp
;
830 if (cstate
->minorversion
)
831 /* See rfc 5661 section 2.6.3.1.1.8 */
832 fh_put(&cstate
->current_fh
);
837 nfsd4_secinfo_no_name(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
838 struct nfsd4_secinfo_no_name
*sin
)
842 switch (sin
->sin_style
) {
843 case NFS4_SECINFO_STYLE4_CURRENT_FH
:
845 case NFS4_SECINFO_STYLE4_PARENT
:
846 err
= nfsd4_do_lookupp(rqstp
, &cstate
->current_fh
);
853 exp_get(cstate
->current_fh
.fh_export
);
854 sin
->sin_exp
= cstate
->current_fh
.fh_export
;
855 fh_put(&cstate
->current_fh
);
860 nfsd4_setattr(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
861 struct nfsd4_setattr
*setattr
)
863 __be32 status
= nfs_ok
;
866 if (setattr
->sa_iattr
.ia_valid
& ATTR_SIZE
) {
868 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
), cstate
,
869 &setattr
->sa_stateid
, WR_STATE
, NULL
);
872 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
876 err
= fh_want_write(&cstate
->current_fh
);
878 return nfserrno(err
);
881 status
= check_attr_support(rqstp
, cstate
, setattr
->sa_bmval
,
886 if (setattr
->sa_acl
!= NULL
)
887 status
= nfsd4_set_nfs4_acl(rqstp
, &cstate
->current_fh
,
891 status
= nfsd_setattr(rqstp
, &cstate
->current_fh
, &setattr
->sa_iattr
,
894 fh_drop_write(&cstate
->current_fh
);
898 static int fill_in_write_vector(struct kvec
*vec
, struct nfsd4_write
*write
)
901 int buflen
= write
->wr_buflen
;
903 vec
[0].iov_base
= write
->wr_head
.iov_base
;
904 vec
[0].iov_len
= min_t(int, buflen
, write
->wr_head
.iov_len
);
905 buflen
-= vec
[0].iov_len
;
908 vec
[i
].iov_base
= page_address(write
->wr_pagelist
[i
- 1]);
909 vec
[i
].iov_len
= min_t(int, PAGE_SIZE
, buflen
);
910 buflen
-= vec
[i
].iov_len
;
917 nfsd4_write(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
918 struct nfsd4_write
*write
)
920 stateid_t
*stateid
= &write
->wr_stateid
;
921 struct file
*filp
= NULL
;
922 __be32 status
= nfs_ok
;
926 /* no need to check permission - this will be done in nfsd_write() */
928 if (write
->wr_offset
>= OFFSET_MAX
)
932 status
= nfs4_preprocess_stateid_op(SVC_NET(rqstp
),
933 cstate
, stateid
, WR_STATE
, &filp
);
939 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
943 cnt
= write
->wr_buflen
;
944 write
->wr_how_written
= write
->wr_stable_how
;
945 gen_boot_verifier(&write
->wr_verifier
, SVC_NET(rqstp
));
947 nvecs
= fill_in_write_vector(rqstp
->rq_vec
, write
);
948 WARN_ON_ONCE(nvecs
> ARRAY_SIZE(rqstp
->rq_vec
));
950 status
= nfsd_write(rqstp
, &cstate
->current_fh
, filp
,
951 write
->wr_offset
, rqstp
->rq_vec
, nvecs
,
952 &cnt
, &write
->wr_how_written
);
956 write
->wr_bytes_written
= cnt
;
961 /* This routine never returns NFS_OK! If there are no other errors, it
962 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
963 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
964 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
967 _nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
968 struct nfsd4_verify
*verify
)
974 status
= fh_verify(rqstp
, &cstate
->current_fh
, 0, NFSD_MAY_NOP
);
978 status
= check_attr_support(rqstp
, cstate
, verify
->ve_bmval
, NULL
);
982 if ((verify
->ve_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
)
983 || (verify
->ve_bmval
[1] & NFSD_WRITEONLY_ATTRS_WORD1
))
985 if (verify
->ve_attrlen
& 3)
989 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
991 count
= 4 + (verify
->ve_attrlen
>> 2);
992 buf
= kmalloc(count
<< 2, GFP_KERNEL
);
994 return nfserr_jukebox
;
997 status
= nfsd4_encode_fattr(&cstate
->current_fh
,
998 cstate
->current_fh
.fh_export
,
999 cstate
->current_fh
.fh_dentry
, &p
,
1000 count
, verify
->ve_bmval
,
1003 /* this means that nfsd4_encode_fattr() ran out of space */
1004 if (status
== nfserr_resource
)
1005 status
= nfserr_not_same
;
1010 p
= buf
+ 1 + ntohl(buf
[0]);
1011 status
= nfserr_not_same
;
1012 if (ntohl(*p
++) != verify
->ve_attrlen
)
1014 if (!memcmp(p
, verify
->ve_attrval
, verify
->ve_attrlen
))
1015 status
= nfserr_same
;
1023 nfsd4_nverify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1024 struct nfsd4_verify
*verify
)
1028 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1029 return status
== nfserr_not_same
? nfs_ok
: status
;
1033 nfsd4_verify(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1034 struct nfsd4_verify
*verify
)
1038 status
= _nfsd4_verify(rqstp
, cstate
, verify
);
1039 return status
== nfserr_same
? nfs_ok
: status
;
1046 nfsd4_proc_null(struct svc_rqst
*rqstp
, void *argp
, void *resp
)
1051 static inline void nfsd4_increment_op_stats(u32 opnum
)
1053 if (opnum
>= FIRST_NFS4_OP
&& opnum
<= LAST_NFS4_OP
)
1054 nfsdstats
.nfs4_opcount
[opnum
]++;
1057 typedef __be32(*nfsd4op_func
)(struct svc_rqst
*, struct nfsd4_compound_state
*,
1059 typedef u32(*nfsd4op_rsize
)(struct svc_rqst
*, struct nfsd4_op
*op
);
1060 typedef void(*stateid_setter
)(struct nfsd4_compound_state
*, void *);
1061 typedef void(*stateid_getter
)(struct nfsd4_compound_state
*, void *);
1063 enum nfsd4_op_flags
{
1064 ALLOWED_WITHOUT_FH
= 1 << 0, /* No current filehandle required */
1065 ALLOWED_ON_ABSENT_FS
= 1 << 1, /* ops processed on absent fs */
1066 ALLOWED_AS_FIRST_OP
= 1 << 2, /* ops reqired first in compound */
1067 /* For rfc 5661 section 2.6.3.1.1: */
1068 OP_HANDLES_WRONGSEC
= 1 << 3,
1069 OP_IS_PUTFH_LIKE
= 1 << 4,
1071 * These are the ops whose result size we estimate before
1072 * encoding, to avoid performing an op then not being able to
1073 * respond or cache a response. This includes writes and setattrs
1074 * as well as the operations usually called "nonidempotent":
1076 OP_MODIFIES_SOMETHING
= 1 << 5,
1078 * Cache compounds containing these ops in the xid-based drc:
1079 * We use the DRC for compounds containing non-idempotent
1080 * operations, *except* those that are 4.1-specific (since
1081 * sessions provide their own EOS), and except for stateful
1082 * operations other than setclientid and setclientid_confirm
1083 * (since sequence numbers provide EOS for open, lock, etc in
1086 OP_CACHEME
= 1 << 6,
1088 * These are ops which clear current state id.
1090 OP_CLEAR_STATEID
= 1 << 7,
1093 struct nfsd4_operation
{
1094 nfsd4op_func op_func
;
1097 /* Try to get response size before operation */
1098 nfsd4op_rsize op_rsize_bop
;
1099 stateid_getter op_get_currentstateid
;
1100 stateid_setter op_set_currentstateid
;
1103 static struct nfsd4_operation nfsd4_ops
[];
1106 static const char *nfsd4_op_name(unsigned opnum
);
1110 * Enforce NFSv4.1 COMPOUND ordering rules:
1112 * Also note, enforced elsewhere:
1113 * - SEQUENCE other than as first op results in
1114 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1115 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1116 * (Enforced in nfsd4_bind_conn_to_session().)
1117 * - DESTROY_SESSION must be the final operation in a compound, if
1118 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1119 * (Enforced in nfsd4_destroy_session().)
1121 static __be32
nfs41_check_op_ordering(struct nfsd4_compoundargs
*args
)
1123 struct nfsd4_op
*op
= &args
->ops
[0];
1125 /* These ordering requirements don't apply to NFSv4.0: */
1126 if (args
->minorversion
== 0)
1128 /* This is weird, but OK, not our problem: */
1129 if (args
->opcnt
== 0)
1131 if (op
->status
== nfserr_op_illegal
)
1133 if (!(nfsd4_ops
[op
->opnum
].op_flags
& ALLOWED_AS_FIRST_OP
))
1134 return nfserr_op_not_in_session
;
1135 if (op
->opnum
== OP_SEQUENCE
)
1137 if (args
->opcnt
!= 1)
1138 return nfserr_not_only_op
;
1142 static inline struct nfsd4_operation
*OPDESC(struct nfsd4_op
*op
)
1144 return &nfsd4_ops
[op
->opnum
];
1147 bool nfsd4_cache_this_op(struct nfsd4_op
*op
)
1149 return OPDESC(op
)->op_flags
& OP_CACHEME
;
1152 static bool need_wrongsec_check(struct svc_rqst
*rqstp
)
1154 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1155 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1156 struct nfsd4_op
*this = &argp
->ops
[resp
->opcnt
- 1];
1157 struct nfsd4_op
*next
= &argp
->ops
[resp
->opcnt
];
1158 struct nfsd4_operation
*thisd
;
1159 struct nfsd4_operation
*nextd
;
1161 thisd
= OPDESC(this);
1163 * Most ops check wronsec on our own; only the putfh-like ops
1164 * have special rules.
1166 if (!(thisd
->op_flags
& OP_IS_PUTFH_LIKE
))
1169 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1170 * put-filehandle operation if we're not going to use the
1173 if (argp
->opcnt
== resp
->opcnt
)
1176 nextd
= OPDESC(next
);
1178 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1179 * errors themselves as necessary; others should check for them
1182 return !(nextd
->op_flags
& OP_HANDLES_WRONGSEC
);
1189 nfsd4_proc_compound(struct svc_rqst
*rqstp
,
1190 struct nfsd4_compoundargs
*args
,
1191 struct nfsd4_compoundres
*resp
)
1193 struct nfsd4_op
*op
;
1194 struct nfsd4_operation
*opdesc
;
1195 struct nfsd4_compound_state
*cstate
= &resp
->cstate
;
1200 resp
->xbuf
= &rqstp
->rq_res
;
1201 resp
->p
= rqstp
->rq_res
.head
[0].iov_base
+
1202 rqstp
->rq_res
.head
[0].iov_len
;
1203 resp
->tagp
= resp
->p
;
1204 /* reserve space for: taglen, tag, and opcnt */
1205 resp
->p
+= 2 + XDR_QUADLEN(args
->taglen
);
1206 resp
->end
= rqstp
->rq_res
.head
[0].iov_base
+ PAGE_SIZE
;
1207 resp
->taglen
= args
->taglen
;
1208 resp
->tag
= args
->tag
;
1210 resp
->rqstp
= rqstp
;
1211 resp
->cstate
.minorversion
= args
->minorversion
;
1212 resp
->cstate
.replay_owner
= NULL
;
1213 resp
->cstate
.session
= NULL
;
1214 fh_init(&resp
->cstate
.current_fh
, NFS4_FHSIZE
);
1215 fh_init(&resp
->cstate
.save_fh
, NFS4_FHSIZE
);
1217 * Don't use the deferral mechanism for NFSv4; compounds make it
1218 * too hard to avoid non-idempotency problems.
1220 rqstp
->rq_usedeferral
= 0;
1223 * According to RFC3010, this takes precedence over all other errors.
1225 status
= nfserr_minor_vers_mismatch
;
1226 if (args
->minorversion
> nfsd_supported_minorversion
)
1229 status
= nfs41_check_op_ordering(args
);
1232 op
->status
= status
;
1236 while (!status
&& resp
->opcnt
< args
->opcnt
) {
1237 op
= &args
->ops
[resp
->opcnt
++];
1239 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1240 resp
->opcnt
, args
->opcnt
, op
->opnum
,
1241 nfsd4_op_name(op
->opnum
));
1243 * The XDR decode routines may have pre-set op->status;
1244 * for example, if there is a miscellaneous XDR error
1245 * it will be set to nfserr_bad_xdr.
1250 /* We must be able to encode a successful response to
1251 * this operation, with enough room left over to encode a
1252 * failed response to the next operation. If we don't
1253 * have enough room, fail with ERR_RESOURCE.
1255 slack_bytes
= (char *)resp
->end
- (char *)resp
->p
;
1256 if (slack_bytes
< COMPOUND_SLACK_SPACE
1257 + COMPOUND_ERR_SLACK_SPACE
) {
1258 BUG_ON(slack_bytes
< COMPOUND_ERR_SLACK_SPACE
);
1259 op
->status
= nfserr_resource
;
1263 opdesc
= OPDESC(op
);
1265 if (!cstate
->current_fh
.fh_dentry
) {
1266 if (!(opdesc
->op_flags
& ALLOWED_WITHOUT_FH
)) {
1267 op
->status
= nfserr_nofilehandle
;
1270 } else if (cstate
->current_fh
.fh_export
->ex_fslocs
.migrated
&&
1271 !(opdesc
->op_flags
& ALLOWED_ON_ABSENT_FS
)) {
1272 op
->status
= nfserr_moved
;
1276 /* If op is non-idempotent */
1277 if (opdesc
->op_flags
& OP_MODIFIES_SOMETHING
) {
1278 plen
= opdesc
->op_rsize_bop(rqstp
, op
);
1279 op
->status
= nfsd4_check_resp_size(resp
, plen
);
1285 if (opdesc
->op_func
) {
1286 if (opdesc
->op_get_currentstateid
)
1287 opdesc
->op_get_currentstateid(cstate
, &op
->u
);
1288 op
->status
= opdesc
->op_func(rqstp
, cstate
, &op
->u
);
1290 BUG_ON(op
->status
== nfs_ok
);
1293 if (opdesc
->op_set_currentstateid
)
1294 opdesc
->op_set_currentstateid(cstate
, &op
->u
);
1296 if (opdesc
->op_flags
& OP_CLEAR_STATEID
)
1297 clear_current_stateid(cstate
);
1299 if (need_wrongsec_check(rqstp
))
1300 op
->status
= check_nfsd_access(cstate
->current_fh
.fh_export
, rqstp
);
1304 /* Only from SEQUENCE */
1305 if (resp
->cstate
.status
== nfserr_replay_cache
) {
1306 dprintk("%s NFS4.1 replay from cache\n", __func__
);
1307 status
= op
->status
;
1310 if (op
->status
== nfserr_replay_me
) {
1311 op
->replay
= &cstate
->replay_owner
->so_replay
;
1312 nfsd4_encode_replay(resp
, op
);
1313 status
= op
->status
= op
->replay
->rp_status
;
1315 nfsd4_encode_operation(resp
, op
);
1316 status
= op
->status
;
1319 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1320 args
->ops
, args
->opcnt
, resp
->opcnt
, op
->opnum
,
1321 be32_to_cpu(status
));
1323 if (cstate
->replay_owner
) {
1324 nfs4_unlock_state();
1325 cstate
->replay_owner
= NULL
;
1327 /* XXX Ugh, we need to get rid of this kind of special case: */
1328 if (op
->opnum
== OP_READ
&& op
->u
.read
.rd_filp
)
1329 fput(op
->u
.read
.rd_filp
);
1331 nfsd4_increment_op_stats(op
->opnum
);
1334 resp
->cstate
.status
= status
;
1335 fh_put(&resp
->cstate
.current_fh
);
1336 fh_put(&resp
->cstate
.save_fh
);
1337 BUG_ON(resp
->cstate
.replay_owner
);
1339 /* Reset deferral mechanism for RPC deferrals */
1340 rqstp
->rq_usedeferral
= 1;
1341 dprintk("nfsv4 compound returned %d\n", ntohl(status
));
1345 #define op_encode_hdr_size (2)
1346 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1347 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1348 #define op_encode_change_info_maxsz (5)
1349 #define nfs4_fattr_bitmap_maxsz (4)
1351 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1352 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1354 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1356 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1357 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1358 op_encode_ace_maxsz)
1360 #define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1362 static inline u32
nfsd4_only_status_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1364 return (op_encode_hdr_size
) * sizeof(__be32
);
1367 static inline u32
nfsd4_status_stateid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1369 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
)* sizeof(__be32
);
1372 static inline u32
nfsd4_commit_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1374 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1377 static inline u32
nfsd4_create_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1379 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1380 + nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1383 static inline u32
nfsd4_link_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1385 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1389 static inline u32
nfsd4_lock_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1391 return (op_encode_hdr_size
+ op_encode_lock_denied_maxsz
)
1395 static inline u32
nfsd4_open_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1397 return (op_encode_hdr_size
+ op_encode_stateid_maxsz
1398 + op_encode_change_info_maxsz
+ 1
1399 + nfs4_fattr_bitmap_maxsz
1400 + op_encode_delegation_maxsz
) * sizeof(__be32
);
1403 static inline u32
nfsd4_read_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1405 u32 maxcount
= 0, rlen
= 0;
1407 maxcount
= svc_max_payload(rqstp
);
1408 rlen
= op
->u
.read
.rd_length
;
1410 if (rlen
> maxcount
)
1413 return (op_encode_hdr_size
+ 2) * sizeof(__be32
) + rlen
;
1416 static inline u32
nfsd4_readdir_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1418 u32 rlen
= op
->u
.readdir
.rd_maxcount
;
1420 if (rlen
> PAGE_SIZE
)
1423 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
)
1424 * sizeof(__be32
) + rlen
;
1427 static inline u32
nfsd4_remove_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1429 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
)
1433 static inline u32
nfsd4_rename_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1435 return (op_encode_hdr_size
+ op_encode_change_info_maxsz
1436 + op_encode_change_info_maxsz
) * sizeof(__be32
);
1439 static inline u32
nfsd4_setattr_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1441 return (op_encode_hdr_size
+ nfs4_fattr_bitmap_maxsz
) * sizeof(__be32
);
1444 static inline u32
nfsd4_setclientid_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1446 return (op_encode_hdr_size
+ 2 + 1024) * sizeof(__be32
);
1449 static inline u32
nfsd4_write_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1451 return (op_encode_hdr_size
+ op_encode_verifier_maxsz
) * sizeof(__be32
);
1454 static inline u32
nfsd4_exchange_id_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1456 return (op_encode_hdr_size
+ 2 + 1 + /* eir_clientid, eir_sequenceid */\
1457 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1458 2 + /*eir_server_owner.so_minor_id */\
1459 /* eir_server_owner.so_major_id<> */\
1460 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1461 /* eir_server_scope<> */\
1462 XDR_QUADLEN(NFS4_OPAQUE_LIMIT
) + 1 +\
1463 1 + /* eir_server_impl_id array length */\
1464 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32
);
1467 static inline u32
nfsd4_bind_conn_to_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1469 return (op_encode_hdr_size
+ \
1470 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* bctsr_sessid */\
1471 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32
);
1474 static inline u32
nfsd4_create_session_rsize(struct svc_rqst
*rqstp
, struct nfsd4_op
*op
)
1476 return (op_encode_hdr_size
+ \
1477 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN
) + /* sessionid */\
1478 2 + /* csr_sequence, csr_flags */\
1479 op_encode_channel_attrs_maxsz
+ \
1480 op_encode_channel_attrs_maxsz
) * sizeof(__be32
);
1483 static struct nfsd4_operation nfsd4_ops
[] = {
1485 .op_func
= (nfsd4op_func
)nfsd4_access
,
1486 .op_name
= "OP_ACCESS",
1489 .op_func
= (nfsd4op_func
)nfsd4_close
,
1490 .op_flags
= OP_MODIFIES_SOMETHING
,
1491 .op_name
= "OP_CLOSE",
1492 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1493 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_closestateid
,
1494 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_closestateid
,
1497 .op_func
= (nfsd4op_func
)nfsd4_commit
,
1498 .op_flags
= OP_MODIFIES_SOMETHING
,
1499 .op_name
= "OP_COMMIT",
1500 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_commit_rsize
,
1503 .op_func
= (nfsd4op_func
)nfsd4_create
,
1504 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
| OP_CLEAR_STATEID
,
1505 .op_name
= "OP_CREATE",
1506 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_rsize
,
1508 [OP_DELEGRETURN
] = {
1509 .op_func
= (nfsd4op_func
)nfsd4_delegreturn
,
1510 .op_flags
= OP_MODIFIES_SOMETHING
,
1511 .op_name
= "OP_DELEGRETURN",
1512 .op_rsize_bop
= nfsd4_only_status_rsize
,
1513 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_delegreturnstateid
,
1516 .op_func
= (nfsd4op_func
)nfsd4_getattr
,
1517 .op_flags
= ALLOWED_ON_ABSENT_FS
,
1518 .op_name
= "OP_GETATTR",
1521 .op_func
= (nfsd4op_func
)nfsd4_getfh
,
1522 .op_name
= "OP_GETFH",
1525 .op_func
= (nfsd4op_func
)nfsd4_link
,
1526 .op_flags
= ALLOWED_ON_ABSENT_FS
| OP_MODIFIES_SOMETHING
1528 .op_name
= "OP_LINK",
1529 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_link_rsize
,
1532 .op_func
= (nfsd4op_func
)nfsd4_lock
,
1533 .op_flags
= OP_MODIFIES_SOMETHING
,
1534 .op_name
= "OP_LOCK",
1535 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_lock_rsize
,
1536 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_lockstateid
,
1539 .op_func
= (nfsd4op_func
)nfsd4_lockt
,
1540 .op_name
= "OP_LOCKT",
1543 .op_func
= (nfsd4op_func
)nfsd4_locku
,
1544 .op_flags
= OP_MODIFIES_SOMETHING
,
1545 .op_name
= "OP_LOCKU",
1546 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1547 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_lockustateid
,
1550 .op_func
= (nfsd4op_func
)nfsd4_lookup
,
1551 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1552 .op_name
= "OP_LOOKUP",
1555 .op_func
= (nfsd4op_func
)nfsd4_lookupp
,
1556 .op_flags
= OP_HANDLES_WRONGSEC
| OP_CLEAR_STATEID
,
1557 .op_name
= "OP_LOOKUPP",
1560 .op_func
= (nfsd4op_func
)nfsd4_nverify
,
1561 .op_name
= "OP_NVERIFY",
1564 .op_func
= (nfsd4op_func
)nfsd4_open
,
1565 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1566 .op_name
= "OP_OPEN",
1567 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_open_rsize
,
1568 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_openstateid
,
1570 [OP_OPEN_CONFIRM
] = {
1571 .op_func
= (nfsd4op_func
)nfsd4_open_confirm
,
1572 .op_flags
= OP_MODIFIES_SOMETHING
,
1573 .op_name
= "OP_OPEN_CONFIRM",
1574 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1576 [OP_OPEN_DOWNGRADE
] = {
1577 .op_func
= (nfsd4op_func
)nfsd4_open_downgrade
,
1578 .op_flags
= OP_MODIFIES_SOMETHING
,
1579 .op_name
= "OP_OPEN_DOWNGRADE",
1580 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_status_stateid_rsize
,
1581 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_opendowngradestateid
,
1582 .op_set_currentstateid
= (stateid_setter
)nfsd4_set_opendowngradestateid
,
1585 .op_func
= (nfsd4op_func
)nfsd4_putfh
,
1586 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1587 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
1589 .op_name
= "OP_PUTFH",
1590 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1593 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1594 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1595 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
1597 .op_name
= "OP_PUTPUBFH",
1598 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1601 .op_func
= (nfsd4op_func
)nfsd4_putrootfh
,
1602 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1603 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
1605 .op_name
= "OP_PUTROOTFH",
1606 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1609 .op_func
= (nfsd4op_func
)nfsd4_read
,
1610 .op_flags
= OP_MODIFIES_SOMETHING
,
1611 .op_name
= "OP_READ",
1612 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_read_rsize
,
1613 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_readstateid
,
1616 .op_func
= (nfsd4op_func
)nfsd4_readdir
,
1617 .op_flags
= OP_MODIFIES_SOMETHING
,
1618 .op_name
= "OP_READDIR",
1619 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_readdir_rsize
,
1622 .op_func
= (nfsd4op_func
)nfsd4_readlink
,
1623 .op_name
= "OP_READLINK",
1626 .op_func
= (nfsd4op_func
)nfsd4_remove
,
1627 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1628 .op_name
= "OP_REMOVE",
1629 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_remove_rsize
,
1632 .op_func
= (nfsd4op_func
)nfsd4_rename
,
1633 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1634 .op_name
= "OP_RENAME",
1635 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_rename_rsize
,
1638 .op_func
= (nfsd4op_func
)nfsd4_renew
,
1639 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1640 | OP_MODIFIES_SOMETHING
,
1641 .op_name
= "OP_RENEW",
1642 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1646 .op_func
= (nfsd4op_func
)nfsd4_restorefh
,
1647 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1648 | OP_IS_PUTFH_LIKE
| OP_MODIFIES_SOMETHING
,
1649 .op_name
= "OP_RESTOREFH",
1650 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1653 .op_func
= (nfsd4op_func
)nfsd4_savefh
,
1654 .op_flags
= OP_HANDLES_WRONGSEC
| OP_MODIFIES_SOMETHING
,
1655 .op_name
= "OP_SAVEFH",
1656 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1659 .op_func
= (nfsd4op_func
)nfsd4_secinfo
,
1660 .op_flags
= OP_HANDLES_WRONGSEC
,
1661 .op_name
= "OP_SECINFO",
1664 .op_func
= (nfsd4op_func
)nfsd4_setattr
,
1665 .op_name
= "OP_SETATTR",
1666 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1667 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setattr_rsize
,
1668 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_setattrstateid
,
1670 [OP_SETCLIENTID
] = {
1671 .op_func
= (nfsd4op_func
)nfsd4_setclientid
,
1672 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1673 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1674 .op_name
= "OP_SETCLIENTID",
1675 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_setclientid_rsize
,
1677 [OP_SETCLIENTID_CONFIRM
] = {
1678 .op_func
= (nfsd4op_func
)nfsd4_setclientid_confirm
,
1679 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1680 | OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1681 .op_name
= "OP_SETCLIENTID_CONFIRM",
1682 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1685 .op_func
= (nfsd4op_func
)nfsd4_verify
,
1686 .op_name
= "OP_VERIFY",
1689 .op_func
= (nfsd4op_func
)nfsd4_write
,
1690 .op_flags
= OP_MODIFIES_SOMETHING
| OP_CACHEME
,
1691 .op_name
= "OP_WRITE",
1692 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_write_rsize
,
1693 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_writestateid
,
1695 [OP_RELEASE_LOCKOWNER
] = {
1696 .op_func
= (nfsd4op_func
)nfsd4_release_lockowner
,
1697 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_ON_ABSENT_FS
1698 | OP_MODIFIES_SOMETHING
,
1699 .op_name
= "OP_RELEASE_LOCKOWNER",
1700 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1703 /* NFSv4.1 operations */
1704 [OP_EXCHANGE_ID
] = {
1705 .op_func
= (nfsd4op_func
)nfsd4_exchange_id
,
1706 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1707 | OP_MODIFIES_SOMETHING
,
1708 .op_name
= "OP_EXCHANGE_ID",
1709 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_exchange_id_rsize
,
1711 [OP_BACKCHANNEL_CTL
] = {
1712 .op_func
= (nfsd4op_func
)nfsd4_backchannel_ctl
,
1713 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1714 .op_name
= "OP_BACKCHANNEL_CTL",
1715 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1717 [OP_BIND_CONN_TO_SESSION
] = {
1718 .op_func
= (nfsd4op_func
)nfsd4_bind_conn_to_session
,
1719 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1720 | OP_MODIFIES_SOMETHING
,
1721 .op_name
= "OP_BIND_CONN_TO_SESSION",
1722 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_bind_conn_to_session_rsize
,
1724 [OP_CREATE_SESSION
] = {
1725 .op_func
= (nfsd4op_func
)nfsd4_create_session
,
1726 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1727 | OP_MODIFIES_SOMETHING
,
1728 .op_name
= "OP_CREATE_SESSION",
1729 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_create_session_rsize
,
1731 [OP_DESTROY_SESSION
] = {
1732 .op_func
= (nfsd4op_func
)nfsd4_destroy_session
,
1733 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1734 | OP_MODIFIES_SOMETHING
,
1735 .op_name
= "OP_DESTROY_SESSION",
1736 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1739 .op_func
= (nfsd4op_func
)nfsd4_sequence
,
1740 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
,
1741 .op_name
= "OP_SEQUENCE",
1743 [OP_DESTROY_CLIENTID
] = {
1744 .op_func
= (nfsd4op_func
)nfsd4_destroy_clientid
,
1745 .op_flags
= ALLOWED_WITHOUT_FH
| ALLOWED_AS_FIRST_OP
1746 | OP_MODIFIES_SOMETHING
,
1747 .op_name
= "OP_DESTROY_CLIENTID",
1748 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1750 [OP_RECLAIM_COMPLETE
] = {
1751 .op_func
= (nfsd4op_func
)nfsd4_reclaim_complete
,
1752 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1753 .op_name
= "OP_RECLAIM_COMPLETE",
1754 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1756 [OP_SECINFO_NO_NAME
] = {
1757 .op_func
= (nfsd4op_func
)nfsd4_secinfo_no_name
,
1758 .op_flags
= OP_HANDLES_WRONGSEC
,
1759 .op_name
= "OP_SECINFO_NO_NAME",
1761 [OP_TEST_STATEID
] = {
1762 .op_func
= (nfsd4op_func
)nfsd4_test_stateid
,
1763 .op_flags
= ALLOWED_WITHOUT_FH
,
1764 .op_name
= "OP_TEST_STATEID",
1766 [OP_FREE_STATEID
] = {
1767 .op_func
= (nfsd4op_func
)nfsd4_free_stateid
,
1768 .op_flags
= ALLOWED_WITHOUT_FH
| OP_MODIFIES_SOMETHING
,
1769 .op_name
= "OP_FREE_STATEID",
1770 .op_get_currentstateid
= (stateid_getter
)nfsd4_get_freestateid
,
1771 .op_rsize_bop
= (nfsd4op_rsize
)nfsd4_only_status_rsize
,
1776 static const char *nfsd4_op_name(unsigned opnum
)
1778 if (opnum
< ARRAY_SIZE(nfsd4_ops
))
1779 return nfsd4_ops
[opnum
].op_name
;
1780 return "unknown_operation";
1784 #define nfsd4_voidres nfsd4_voidargs
1785 struct nfsd4_voidargs
{ int dummy
; };
1787 static struct svc_procedure nfsd_procedures4
[2] = {
1789 .pc_func
= (svc_procfunc
) nfsd4_proc_null
,
1790 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_voidres
,
1791 .pc_argsize
= sizeof(struct nfsd4_voidargs
),
1792 .pc_ressize
= sizeof(struct nfsd4_voidres
),
1793 .pc_cachetype
= RC_NOCACHE
,
1796 [NFSPROC4_COMPOUND
] = {
1797 .pc_func
= (svc_procfunc
) nfsd4_proc_compound
,
1798 .pc_decode
= (kxdrproc_t
) nfs4svc_decode_compoundargs
,
1799 .pc_encode
= (kxdrproc_t
) nfs4svc_encode_compoundres
,
1800 .pc_argsize
= sizeof(struct nfsd4_compoundargs
),
1801 .pc_ressize
= sizeof(struct nfsd4_compoundres
),
1802 .pc_release
= nfsd4_release_compoundargs
,
1803 .pc_cachetype
= RC_NOCACHE
,
1804 .pc_xdrressize
= NFSD_BUFSIZE
/4,
1808 struct svc_version nfsd_version4
= {
1811 .vs_proc
= nfsd_procedures4
,
1812 .vs_dispatch
= nfsd_dispatch
,
1813 .vs_xdrsize
= NFS4_SVC_XDRSIZE
,