2 * Server-side XDR 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 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59 #include <linux/security.h>
63 #define NFSDDBG_FACILITY NFSDDBG_XDR
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
70 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
74 check_filename(char *str
, int len
)
80 if (isdotent(str
, len
))
81 return nfserr_badname
;
82 for (i
= 0; i
< len
; i
++)
84 return nfserr_badname
;
96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
98 status = nfserr_bad_xdr; \
101 #define READ32(x) (x) = ntohl(*p++)
102 #define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
106 #define READTIME(x) do { \
111 #define READMEM(x,nbytes) do { \
113 p += XDR_QUADLEN(nbytes); \
115 #define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
123 p += XDR_QUADLEN(nbytes); \
125 #define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
130 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131 #define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
142 static void next_decode_page(struct nfsd4_compoundargs
*argp
)
144 argp
->p
= page_address(argp
->pagelist
[0]);
146 if (argp
->pagelen
< PAGE_SIZE
) {
147 argp
->end
= argp
->p
+ (argp
->pagelen
>>2);
150 argp
->end
= argp
->p
+ (PAGE_SIZE
>>2);
151 argp
->pagelen
-= PAGE_SIZE
;
155 static __be32
*read_buf(struct nfsd4_compoundargs
*argp
, u32 nbytes
)
157 /* We want more bytes than seem to be available.
158 * Maybe we need a new page, maybe we have just run out
160 unsigned int avail
= (char *)argp
->end
- (char *)argp
->p
;
162 if (avail
+ argp
->pagelen
< nbytes
)
164 if (avail
+ PAGE_SIZE
< nbytes
) /* need more than a page !! */
166 /* ok, we can do it with the current plus the next page */
167 if (nbytes
<= sizeof(argp
->tmp
))
171 p
= argp
->tmpp
= kmalloc(nbytes
, GFP_KERNEL
);
177 * The following memcpy is safe because read_buf is always
178 * called with nbytes > avail, and the two cases above both
179 * guarantee p points to at least nbytes bytes.
181 memcpy(p
, argp
->p
, avail
);
182 next_decode_page(argp
);
183 memcpy(((char*)p
)+avail
, argp
->p
, (nbytes
- avail
));
184 argp
->p
+= XDR_QUADLEN(nbytes
- avail
);
188 static int zero_clientid(clientid_t
*clid
)
190 return (clid
->cl_boot
== 0) && (clid
->cl_id
== 0);
194 defer_free(struct nfsd4_compoundargs
*argp
,
195 void (*release
)(const void *), void *p
)
199 tb
= kmalloc(sizeof(*tb
), GFP_KERNEL
);
203 tb
->release
= release
;
204 tb
->next
= argp
->to_free
;
209 static char *savemem(struct nfsd4_compoundargs
*argp
, __be32
*p
, int nbytes
)
211 if (p
== argp
->tmp
) {
212 p
= kmemdup(argp
->tmp
, nbytes
, GFP_KERNEL
);
216 BUG_ON(p
!= argp
->tmpp
);
219 if (defer_free(argp
, kfree
, p
)) {
227 nfsd4_decode_bitmap(struct nfsd4_compoundargs
*argp
, u32
*bmval
)
241 READ_BUF(bmlen
<< 2);
253 nfsd4_decode_fattr(struct nfsd4_compoundargs
*argp
, u32
*bmval
,
254 struct iattr
*iattr
, struct nfs4_acl
**acl
,
255 struct xdr_netobj
*label
)
257 int expected_len
, len
= 0;
264 if ((status
= nfsd4_decode_bitmap(argp
, bmval
)))
268 READ32(expected_len
);
270 if (bmval
[0] & FATTR4_WORD0_SIZE
) {
273 READ64(iattr
->ia_size
);
274 iattr
->ia_valid
|= ATTR_SIZE
;
276 if (bmval
[0] & FATTR4_WORD0_ACL
) {
278 struct nfs4_ace
*ace
;
280 READ_BUF(4); len
+= 4;
283 if (nace
> NFS4_ACL_MAX
)
284 return nfserr_resource
;
286 *acl
= nfs4_acl_new(nace
);
291 defer_free(argp
, kfree
, *acl
);
293 (*acl
)->naces
= nace
;
294 for (ace
= (*acl
)->aces
; ace
< (*acl
)->aces
+ nace
; ace
++) {
295 READ_BUF(16); len
+= 16;
298 READ32(ace
->access_mask
);
301 len
+= XDR_QUADLEN(dummy32
) << 2;
302 READMEM(buf
, dummy32
);
303 ace
->whotype
= nfs4_acl_get_whotype(buf
, dummy32
);
305 if (ace
->whotype
!= NFS4_ACL_WHO_NAMED
)
307 else if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
308 status
= nfsd_map_name_to_gid(argp
->rqstp
,
309 buf
, dummy32
, &ace
->who_gid
);
311 status
= nfsd_map_name_to_uid(argp
->rqstp
,
312 buf
, dummy32
, &ace
->who_uid
);
318 if (bmval
[1] & FATTR4_WORD1_MODE
) {
321 READ32(iattr
->ia_mode
);
322 iattr
->ia_mode
&= (S_IFMT
| S_IALLUGO
);
323 iattr
->ia_valid
|= ATTR_MODE
;
325 if (bmval
[1] & FATTR4_WORD1_OWNER
) {
330 len
+= (XDR_QUADLEN(dummy32
) << 2);
331 READMEM(buf
, dummy32
);
332 if ((status
= nfsd_map_name_to_uid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_uid
)))
334 iattr
->ia_valid
|= ATTR_UID
;
336 if (bmval
[1] & FATTR4_WORD1_OWNER_GROUP
) {
341 len
+= (XDR_QUADLEN(dummy32
) << 2);
342 READMEM(buf
, dummy32
);
343 if ((status
= nfsd_map_name_to_gid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_gid
)))
345 iattr
->ia_valid
|= ATTR_GID
;
347 if (bmval
[1] & FATTR4_WORD1_TIME_ACCESS_SET
) {
352 case NFS4_SET_TO_CLIENT_TIME
:
353 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
354 all 32 bits of 'nseconds'. */
357 READ64(iattr
->ia_atime
.tv_sec
);
358 READ32(iattr
->ia_atime
.tv_nsec
);
359 if (iattr
->ia_atime
.tv_nsec
>= (u32
)1000000000)
361 iattr
->ia_valid
|= (ATTR_ATIME
| ATTR_ATIME_SET
);
363 case NFS4_SET_TO_SERVER_TIME
:
364 iattr
->ia_valid
|= ATTR_ATIME
;
370 if (bmval
[1] & FATTR4_WORD1_TIME_MODIFY_SET
) {
375 case NFS4_SET_TO_CLIENT_TIME
:
376 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
377 all 32 bits of 'nseconds'. */
380 READ64(iattr
->ia_mtime
.tv_sec
);
381 READ32(iattr
->ia_mtime
.tv_nsec
);
382 if (iattr
->ia_mtime
.tv_nsec
>= (u32
)1000000000)
384 iattr
->ia_valid
|= (ATTR_MTIME
| ATTR_MTIME_SET
);
386 case NFS4_SET_TO_SERVER_TIME
:
387 iattr
->ia_valid
|= ATTR_MTIME
;
395 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
396 if (bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) {
399 READ32(dummy32
); /* lfs: we don't use it */
402 READ32(dummy32
); /* pi: we don't use it either */
407 if (dummy32
> NFSD4_MAX_SEC_LABEL_LEN
)
408 return nfserr_badlabel
;
409 len
+= (XDR_QUADLEN(dummy32
) << 2);
410 READMEM(buf
, dummy32
);
411 label
->data
= kzalloc(dummy32
+ 1, GFP_KERNEL
);
413 return nfserr_jukebox
;
414 label
->len
= dummy32
;
415 defer_free(argp
, kfree
, label
->data
);
416 memcpy(label
->data
, buf
, dummy32
);
420 if (bmval
[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
421 || bmval
[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
422 || bmval
[2] & ~NFSD_WRITEABLE_ATTRS_WORD2
)
423 READ_BUF(expected_len
- len
);
424 else if (len
!= expected_len
)
430 status
= nfserrno(host_err
);
435 nfsd4_decode_stateid(struct nfsd4_compoundargs
*argp
, stateid_t
*sid
)
439 READ_BUF(sizeof(stateid_t
));
440 READ32(sid
->si_generation
);
441 COPYMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
447 nfsd4_decode_access(struct nfsd4_compoundargs
*argp
, struct nfsd4_access
*access
)
452 READ32(access
->ac_req_access
);
457 static __be32
nfsd4_decode_cb_sec(struct nfsd4_compoundargs
*argp
, struct nfsd4_cb_sec
*cbs
)
465 /* callback_sec_params4 */
469 cbs
->flavor
= (u32
)(-1);
471 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
473 for (i
= 0; i
< nr_secflavs
; ++i
) {
478 /* Nothing to read */
479 if (cbs
->flavor
== (u32
)(-1))
480 cbs
->flavor
= RPC_AUTH_NULL
;
490 SAVEMEM(machine_name
, dummy
);
501 if (cbs
->flavor
== (u32
)(-1)) {
502 kuid_t kuid
= make_kuid(&init_user_ns
, uid
);
503 kgid_t kgid
= make_kgid(&init_user_ns
, gid
);
504 if (uid_valid(kuid
) && gid_valid(kgid
)) {
507 cbs
->flavor
= RPC_AUTH_UNIX
;
509 dprintk("RPC_AUTH_UNIX with invalid"
510 "uid or gid ignoring!\n");
515 dprintk("RPC_AUTH_GSS callback secflavor "
520 /* gcbp_handle_from_server */
523 p
+= XDR_QUADLEN(dummy
);
524 /* gcbp_handle_from_client */
530 dprintk("Illegal callback secflavor\n");
537 static __be32
nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs
*argp
, struct nfsd4_backchannel_ctl
*bc
)
542 READ32(bc
->bc_cb_program
);
543 nfsd4_decode_cb_sec(argp
, &bc
->bc_cb_sec
);
548 static __be32
nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs
*argp
, struct nfsd4_bind_conn_to_session
*bcts
)
552 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 8);
553 COPYMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
555 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
556 * could help us figure out we should be using it. */
561 nfsd4_decode_close(struct nfsd4_compoundargs
*argp
, struct nfsd4_close
*close
)
566 READ32(close
->cl_seqid
);
567 return nfsd4_decode_stateid(argp
, &close
->cl_stateid
);
574 nfsd4_decode_commit(struct nfsd4_compoundargs
*argp
, struct nfsd4_commit
*commit
)
579 READ64(commit
->co_offset
);
580 READ32(commit
->co_count
);
586 nfsd4_decode_create(struct nfsd4_compoundargs
*argp
, struct nfsd4_create
*create
)
591 READ32(create
->cr_type
);
592 switch (create
->cr_type
) {
595 READ32(create
->cr_linklen
);
596 READ_BUF(create
->cr_linklen
);
597 SAVEMEM(create
->cr_linkname
, create
->cr_linklen
);
602 READ32(create
->cr_specdata1
);
603 READ32(create
->cr_specdata2
);
613 READ32(create
->cr_namelen
);
614 READ_BUF(create
->cr_namelen
);
615 SAVEMEM(create
->cr_name
, create
->cr_namelen
);
616 if ((status
= check_filename(create
->cr_name
, create
->cr_namelen
)))
619 status
= nfsd4_decode_fattr(argp
, create
->cr_bmval
, &create
->cr_iattr
,
620 &create
->cr_acl
, &create
->cr_label
);
628 nfsd4_decode_delegreturn(struct nfsd4_compoundargs
*argp
, struct nfsd4_delegreturn
*dr
)
630 return nfsd4_decode_stateid(argp
, &dr
->dr_stateid
);
634 nfsd4_decode_getattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_getattr
*getattr
)
636 return nfsd4_decode_bitmap(argp
, getattr
->ga_bmval
);
640 nfsd4_decode_link(struct nfsd4_compoundargs
*argp
, struct nfsd4_link
*link
)
645 READ32(link
->li_namelen
);
646 READ_BUF(link
->li_namelen
);
647 SAVEMEM(link
->li_name
, link
->li_namelen
);
648 if ((status
= check_filename(link
->li_name
, link
->li_namelen
)))
655 nfsd4_decode_lock(struct nfsd4_compoundargs
*argp
, struct nfsd4_lock
*lock
)
660 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
663 READ32(lock
->lk_type
);
664 if ((lock
->lk_type
< NFS4_READ_LT
) || (lock
->lk_type
> NFS4_WRITEW_LT
))
666 READ32(lock
->lk_reclaim
);
667 READ64(lock
->lk_offset
);
668 READ64(lock
->lk_length
);
669 READ32(lock
->lk_is_new
);
671 if (lock
->lk_is_new
) {
673 READ32(lock
->lk_new_open_seqid
);
674 status
= nfsd4_decode_stateid(argp
, &lock
->lk_new_open_stateid
);
677 READ_BUF(8 + sizeof(clientid_t
));
678 READ32(lock
->lk_new_lock_seqid
);
679 COPYMEM(&lock
->lk_new_clientid
, sizeof(clientid_t
));
680 READ32(lock
->lk_new_owner
.len
);
681 READ_BUF(lock
->lk_new_owner
.len
);
682 READMEM(lock
->lk_new_owner
.data
, lock
->lk_new_owner
.len
);
684 status
= nfsd4_decode_stateid(argp
, &lock
->lk_old_lock_stateid
);
688 READ32(lock
->lk_old_lock_seqid
);
695 nfsd4_decode_lockt(struct nfsd4_compoundargs
*argp
, struct nfsd4_lockt
*lockt
)
700 READ32(lockt
->lt_type
);
701 if((lockt
->lt_type
< NFS4_READ_LT
) || (lockt
->lt_type
> NFS4_WRITEW_LT
))
703 READ64(lockt
->lt_offset
);
704 READ64(lockt
->lt_length
);
705 COPYMEM(&lockt
->lt_clientid
, 8);
706 READ32(lockt
->lt_owner
.len
);
707 READ_BUF(lockt
->lt_owner
.len
);
708 READMEM(lockt
->lt_owner
.data
, lockt
->lt_owner
.len
);
714 nfsd4_decode_locku(struct nfsd4_compoundargs
*argp
, struct nfsd4_locku
*locku
)
719 READ32(locku
->lu_type
);
720 if ((locku
->lu_type
< NFS4_READ_LT
) || (locku
->lu_type
> NFS4_WRITEW_LT
))
722 READ32(locku
->lu_seqid
);
723 status
= nfsd4_decode_stateid(argp
, &locku
->lu_stateid
);
727 READ64(locku
->lu_offset
);
728 READ64(locku
->lu_length
);
734 nfsd4_decode_lookup(struct nfsd4_compoundargs
*argp
, struct nfsd4_lookup
*lookup
)
739 READ32(lookup
->lo_len
);
740 READ_BUF(lookup
->lo_len
);
741 SAVEMEM(lookup
->lo_name
, lookup
->lo_len
);
742 if ((status
= check_filename(lookup
->lo_name
, lookup
->lo_len
)))
748 static __be32
nfsd4_decode_share_access(struct nfsd4_compoundargs
*argp
, u32
*share_access
, u32
*deleg_want
, u32
*deleg_when
)
755 *share_access
= w
& NFS4_SHARE_ACCESS_MASK
;
756 *deleg_want
= w
& NFS4_SHARE_WANT_MASK
;
758 *deleg_when
= w
& NFS4_SHARE_WHEN_MASK
;
760 switch (w
& NFS4_SHARE_ACCESS_MASK
) {
761 case NFS4_SHARE_ACCESS_READ
:
762 case NFS4_SHARE_ACCESS_WRITE
:
763 case NFS4_SHARE_ACCESS_BOTH
:
766 return nfserr_bad_xdr
;
768 w
&= ~NFS4_SHARE_ACCESS_MASK
;
771 if (!argp
->minorversion
)
772 return nfserr_bad_xdr
;
773 switch (w
& NFS4_SHARE_WANT_MASK
) {
774 case NFS4_SHARE_WANT_NO_PREFERENCE
:
775 case NFS4_SHARE_WANT_READ_DELEG
:
776 case NFS4_SHARE_WANT_WRITE_DELEG
:
777 case NFS4_SHARE_WANT_ANY_DELEG
:
778 case NFS4_SHARE_WANT_NO_DELEG
:
779 case NFS4_SHARE_WANT_CANCEL
:
782 return nfserr_bad_xdr
;
784 w
&= ~NFS4_SHARE_WANT_MASK
;
788 if (!deleg_when
) /* open_downgrade */
791 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL
:
792 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
:
793 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL
|
794 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
):
798 return nfserr_bad_xdr
;
801 static __be32
nfsd4_decode_share_deny(struct nfsd4_compoundargs
*argp
, u32
*x
)
807 /* Note: unlinke access bits, deny bits may be zero. */
808 if (*x
& ~NFS4_SHARE_DENY_BOTH
)
809 return nfserr_bad_xdr
;
812 return nfserr_bad_xdr
;
815 static __be32
nfsd4_decode_opaque(struct nfsd4_compoundargs
*argp
, struct xdr_netobj
*o
)
822 if (o
->len
== 0 || o
->len
> NFS4_OPAQUE_LIMIT
)
823 return nfserr_bad_xdr
;
826 SAVEMEM(o
->data
, o
->len
);
829 return nfserr_bad_xdr
;
833 nfsd4_decode_open(struct nfsd4_compoundargs
*argp
, struct nfsd4_open
*open
)
838 memset(open
->op_bmval
, 0, sizeof(open
->op_bmval
));
839 open
->op_iattr
.ia_valid
= 0;
840 open
->op_openowner
= NULL
;
842 open
->op_xdr_error
= 0;
843 /* seqid, share_access, share_deny, clientid, ownerlen */
845 READ32(open
->op_seqid
);
846 /* decode, yet ignore deleg_when until supported */
847 status
= nfsd4_decode_share_access(argp
, &open
->op_share_access
,
848 &open
->op_deleg_want
, &dummy
);
851 status
= nfsd4_decode_share_deny(argp
, &open
->op_share_deny
);
854 READ_BUF(sizeof(clientid_t
));
855 COPYMEM(&open
->op_clientid
, sizeof(clientid_t
));
856 status
= nfsd4_decode_opaque(argp
, &open
->op_owner
);
860 READ32(open
->op_create
);
861 switch (open
->op_create
) {
862 case NFS4_OPEN_NOCREATE
:
864 case NFS4_OPEN_CREATE
:
866 READ32(open
->op_createmode
);
867 switch (open
->op_createmode
) {
868 case NFS4_CREATE_UNCHECKED
:
869 case NFS4_CREATE_GUARDED
:
870 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
871 &open
->op_iattr
, &open
->op_acl
, &open
->op_label
);
875 case NFS4_CREATE_EXCLUSIVE
:
876 READ_BUF(NFS4_VERIFIER_SIZE
);
877 COPYMEM(open
->op_verf
.data
, NFS4_VERIFIER_SIZE
);
879 case NFS4_CREATE_EXCLUSIVE4_1
:
880 if (argp
->minorversion
< 1)
882 READ_BUF(NFS4_VERIFIER_SIZE
);
883 COPYMEM(open
->op_verf
.data
, NFS4_VERIFIER_SIZE
);
884 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
885 &open
->op_iattr
, &open
->op_acl
, &open
->op_label
);
899 READ32(open
->op_claim_type
);
900 switch (open
->op_claim_type
) {
901 case NFS4_OPEN_CLAIM_NULL
:
902 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
904 READ32(open
->op_fname
.len
);
905 READ_BUF(open
->op_fname
.len
);
906 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
907 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
)))
910 case NFS4_OPEN_CLAIM_PREVIOUS
:
912 READ32(open
->op_delegate_type
);
914 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
915 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
919 READ32(open
->op_fname
.len
);
920 READ_BUF(open
->op_fname
.len
);
921 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
922 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
)))
925 case NFS4_OPEN_CLAIM_FH
:
926 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
927 if (argp
->minorversion
< 1)
931 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
932 if (argp
->minorversion
< 1)
934 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
946 nfsd4_decode_open_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_confirm
*open_conf
)
950 if (argp
->minorversion
>= 1)
951 return nfserr_notsupp
;
953 status
= nfsd4_decode_stateid(argp
, &open_conf
->oc_req_stateid
);
957 READ32(open_conf
->oc_seqid
);
963 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_downgrade
*open_down
)
967 status
= nfsd4_decode_stateid(argp
, &open_down
->od_stateid
);
971 READ32(open_down
->od_seqid
);
972 status
= nfsd4_decode_share_access(argp
, &open_down
->od_share_access
,
973 &open_down
->od_deleg_want
, NULL
);
976 status
= nfsd4_decode_share_deny(argp
, &open_down
->od_share_deny
);
983 nfsd4_decode_putfh(struct nfsd4_compoundargs
*argp
, struct nfsd4_putfh
*putfh
)
988 READ32(putfh
->pf_fhlen
);
989 if (putfh
->pf_fhlen
> NFS4_FHSIZE
)
991 READ_BUF(putfh
->pf_fhlen
);
992 SAVEMEM(putfh
->pf_fhval
, putfh
->pf_fhlen
);
998 nfsd4_decode_putpubfh(struct nfsd4_compoundargs
*argp
, void *p
)
1000 if (argp
->minorversion
== 0)
1002 return nfserr_notsupp
;
1006 nfsd4_decode_read(struct nfsd4_compoundargs
*argp
, struct nfsd4_read
*read
)
1010 status
= nfsd4_decode_stateid(argp
, &read
->rd_stateid
);
1014 READ64(read
->rd_offset
);
1015 READ32(read
->rd_length
);
1021 nfsd4_decode_readdir(struct nfsd4_compoundargs
*argp
, struct nfsd4_readdir
*readdir
)
1026 READ64(readdir
->rd_cookie
);
1027 COPYMEM(readdir
->rd_verf
.data
, sizeof(readdir
->rd_verf
.data
));
1028 READ32(readdir
->rd_dircount
); /* just in case you needed a useless field... */
1029 READ32(readdir
->rd_maxcount
);
1030 if ((status
= nfsd4_decode_bitmap(argp
, readdir
->rd_bmval
)))
1037 nfsd4_decode_remove(struct nfsd4_compoundargs
*argp
, struct nfsd4_remove
*remove
)
1042 READ32(remove
->rm_namelen
);
1043 READ_BUF(remove
->rm_namelen
);
1044 SAVEMEM(remove
->rm_name
, remove
->rm_namelen
);
1045 if ((status
= check_filename(remove
->rm_name
, remove
->rm_namelen
)))
1052 nfsd4_decode_rename(struct nfsd4_compoundargs
*argp
, struct nfsd4_rename
*rename
)
1057 READ32(rename
->rn_snamelen
);
1058 READ_BUF(rename
->rn_snamelen
+ 4);
1059 SAVEMEM(rename
->rn_sname
, rename
->rn_snamelen
);
1060 READ32(rename
->rn_tnamelen
);
1061 READ_BUF(rename
->rn_tnamelen
);
1062 SAVEMEM(rename
->rn_tname
, rename
->rn_tnamelen
);
1063 if ((status
= check_filename(rename
->rn_sname
, rename
->rn_snamelen
)))
1065 if ((status
= check_filename(rename
->rn_tname
, rename
->rn_tnamelen
)))
1072 nfsd4_decode_renew(struct nfsd4_compoundargs
*argp
, clientid_t
*clientid
)
1076 if (argp
->minorversion
>= 1)
1077 return nfserr_notsupp
;
1079 READ_BUF(sizeof(clientid_t
));
1080 COPYMEM(clientid
, sizeof(clientid_t
));
1086 nfsd4_decode_secinfo(struct nfsd4_compoundargs
*argp
,
1087 struct nfsd4_secinfo
*secinfo
)
1092 READ32(secinfo
->si_namelen
);
1093 READ_BUF(secinfo
->si_namelen
);
1094 SAVEMEM(secinfo
->si_name
, secinfo
->si_namelen
);
1095 status
= check_filename(secinfo
->si_name
, secinfo
->si_namelen
);
1102 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs
*argp
,
1103 struct nfsd4_secinfo_no_name
*sin
)
1108 READ32(sin
->sin_style
);
1113 nfsd4_decode_setattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_setattr
*setattr
)
1117 status
= nfsd4_decode_stateid(argp
, &setattr
->sa_stateid
);
1120 return nfsd4_decode_fattr(argp
, setattr
->sa_bmval
, &setattr
->sa_iattr
,
1121 &setattr
->sa_acl
, &setattr
->sa_label
);
1125 nfsd4_decode_setclientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid
*setclientid
)
1129 if (argp
->minorversion
>= 1)
1130 return nfserr_notsupp
;
1132 READ_BUF(NFS4_VERIFIER_SIZE
);
1133 COPYMEM(setclientid
->se_verf
.data
, NFS4_VERIFIER_SIZE
);
1135 status
= nfsd4_decode_opaque(argp
, &setclientid
->se_name
);
1137 return nfserr_bad_xdr
;
1139 READ32(setclientid
->se_callback_prog
);
1140 READ32(setclientid
->se_callback_netid_len
);
1142 READ_BUF(setclientid
->se_callback_netid_len
+ 4);
1143 SAVEMEM(setclientid
->se_callback_netid_val
, setclientid
->se_callback_netid_len
);
1144 READ32(setclientid
->se_callback_addr_len
);
1146 READ_BUF(setclientid
->se_callback_addr_len
+ 4);
1147 SAVEMEM(setclientid
->se_callback_addr_val
, setclientid
->se_callback_addr_len
);
1148 READ32(setclientid
->se_callback_ident
);
1154 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid_confirm
*scd_c
)
1158 if (argp
->minorversion
>= 1)
1159 return nfserr_notsupp
;
1161 READ_BUF(8 + NFS4_VERIFIER_SIZE
);
1162 COPYMEM(&scd_c
->sc_clientid
, 8);
1163 COPYMEM(&scd_c
->sc_confirm
, NFS4_VERIFIER_SIZE
);
1168 /* Also used for NVERIFY */
1170 nfsd4_decode_verify(struct nfsd4_compoundargs
*argp
, struct nfsd4_verify
*verify
)
1174 if ((status
= nfsd4_decode_bitmap(argp
, verify
->ve_bmval
)))
1177 /* For convenience's sake, we compare raw xdr'd attributes in
1178 * nfsd4_proc_verify */
1181 READ32(verify
->ve_attrlen
);
1182 READ_BUF(verify
->ve_attrlen
);
1183 SAVEMEM(verify
->ve_attrval
, verify
->ve_attrlen
);
1189 nfsd4_decode_write(struct nfsd4_compoundargs
*argp
, struct nfsd4_write
*write
)
1195 status
= nfsd4_decode_stateid(argp
, &write
->wr_stateid
);
1199 READ64(write
->wr_offset
);
1200 READ32(write
->wr_stable_how
);
1201 if (write
->wr_stable_how
> 2)
1203 READ32(write
->wr_buflen
);
1205 /* Sorry .. no magic macros for this.. *
1206 * READ_BUF(write->wr_buflen);
1207 * SAVEMEM(write->wr_buf, write->wr_buflen);
1209 avail
= (char*)argp
->end
- (char*)argp
->p
;
1210 if (avail
+ argp
->pagelen
< write
->wr_buflen
) {
1211 dprintk("NFSD: xdr error (%s:%d)\n",
1212 __FILE__
, __LINE__
);
1215 write
->wr_head
.iov_base
= p
;
1216 write
->wr_head
.iov_len
= avail
;
1217 WARN_ON(avail
!= (XDR_QUADLEN(avail
) << 2));
1218 write
->wr_pagelist
= argp
->pagelist
;
1220 len
= XDR_QUADLEN(write
->wr_buflen
) << 2;
1226 pages
= len
>> PAGE_SHIFT
;
1227 argp
->pagelist
+= pages
;
1228 argp
->pagelen
-= pages
* PAGE_SIZE
;
1229 len
-= pages
* PAGE_SIZE
;
1231 argp
->p
= (__be32
*)page_address(argp
->pagelist
[0]);
1233 argp
->end
= argp
->p
+ XDR_QUADLEN(PAGE_SIZE
);
1235 argp
->p
+= XDR_QUADLEN(len
);
1241 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs
*argp
, struct nfsd4_release_lockowner
*rlockowner
)
1245 if (argp
->minorversion
>= 1)
1246 return nfserr_notsupp
;
1249 COPYMEM(&rlockowner
->rl_clientid
, sizeof(clientid_t
));
1250 READ32(rlockowner
->rl_owner
.len
);
1251 READ_BUF(rlockowner
->rl_owner
.len
);
1252 READMEM(rlockowner
->rl_owner
.data
, rlockowner
->rl_owner
.len
);
1254 if (argp
->minorversion
&& !zero_clientid(&rlockowner
->rl_clientid
))
1255 return nfserr_inval
;
1260 nfsd4_decode_exchange_id(struct nfsd4_compoundargs
*argp
,
1261 struct nfsd4_exchange_id
*exid
)
1266 READ_BUF(NFS4_VERIFIER_SIZE
);
1267 COPYMEM(exid
->verifier
.data
, NFS4_VERIFIER_SIZE
);
1269 status
= nfsd4_decode_opaque(argp
, &exid
->clname
);
1271 return nfserr_bad_xdr
;
1274 READ32(exid
->flags
);
1276 /* Ignore state_protect4_a */
1278 READ32(exid
->spa_how
);
1279 switch (exid
->spa_how
) {
1283 /* spo_must_enforce */
1286 READ_BUF(dummy
* 4);
1289 /* spo_must_allow */
1292 READ_BUF(dummy
* 4);
1299 READ_BUF(dummy
* 4);
1304 READ_BUF(dummy
* 4);
1307 /* ssp_hash_algs<> */
1314 p
+= XDR_QUADLEN(dummy
);
1317 /* ssp_encr_algs<> */
1324 p
+= XDR_QUADLEN(dummy
);
1327 /* ssp_window and ssp_num_gss_handles */
1336 /* Ignore Implementation ID */
1337 READ_BUF(4); /* nfs_impl_id4 array length */
1348 p
+= XDR_QUADLEN(dummy
);
1354 p
+= XDR_QUADLEN(dummy
);
1364 nfsd4_decode_create_session(struct nfsd4_compoundargs
*argp
,
1365 struct nfsd4_create_session
*sess
)
1371 COPYMEM(&sess
->clientid
, 8);
1372 READ32(sess
->seqid
);
1373 READ32(sess
->flags
);
1375 /* Fore channel attrs */
1377 READ32(dummy
); /* headerpadsz is always 0 */
1378 READ32(sess
->fore_channel
.maxreq_sz
);
1379 READ32(sess
->fore_channel
.maxresp_sz
);
1380 READ32(sess
->fore_channel
.maxresp_cached
);
1381 READ32(sess
->fore_channel
.maxops
);
1382 READ32(sess
->fore_channel
.maxreqs
);
1383 READ32(sess
->fore_channel
.nr_rdma_attrs
);
1384 if (sess
->fore_channel
.nr_rdma_attrs
== 1) {
1386 READ32(sess
->fore_channel
.rdma_attrs
);
1387 } else if (sess
->fore_channel
.nr_rdma_attrs
> 1) {
1388 dprintk("Too many fore channel attr bitmaps!\n");
1392 /* Back channel attrs */
1394 READ32(dummy
); /* headerpadsz is always 0 */
1395 READ32(sess
->back_channel
.maxreq_sz
);
1396 READ32(sess
->back_channel
.maxresp_sz
);
1397 READ32(sess
->back_channel
.maxresp_cached
);
1398 READ32(sess
->back_channel
.maxops
);
1399 READ32(sess
->back_channel
.maxreqs
);
1400 READ32(sess
->back_channel
.nr_rdma_attrs
);
1401 if (sess
->back_channel
.nr_rdma_attrs
== 1) {
1403 READ32(sess
->back_channel
.rdma_attrs
);
1404 } else if (sess
->back_channel
.nr_rdma_attrs
> 1) {
1405 dprintk("Too many back channel attr bitmaps!\n");
1410 READ32(sess
->callback_prog
);
1411 nfsd4_decode_cb_sec(argp
, &sess
->cb_sec
);
1416 nfsd4_decode_destroy_session(struct nfsd4_compoundargs
*argp
,
1417 struct nfsd4_destroy_session
*destroy_session
)
1420 READ_BUF(NFS4_MAX_SESSIONID_LEN
);
1421 COPYMEM(destroy_session
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1427 nfsd4_decode_free_stateid(struct nfsd4_compoundargs
*argp
,
1428 struct nfsd4_free_stateid
*free_stateid
)
1432 READ_BUF(sizeof(stateid_t
));
1433 READ32(free_stateid
->fr_stateid
.si_generation
);
1434 COPYMEM(&free_stateid
->fr_stateid
.si_opaque
, sizeof(stateid_opaque_t
));
1440 nfsd4_decode_sequence(struct nfsd4_compoundargs
*argp
,
1441 struct nfsd4_sequence
*seq
)
1445 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 16);
1446 COPYMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1448 READ32(seq
->slotid
);
1449 READ32(seq
->maxslots
);
1450 READ32(seq
->cachethis
);
1456 nfsd4_decode_test_stateid(struct nfsd4_compoundargs
*argp
, struct nfsd4_test_stateid
*test_stateid
)
1460 struct nfsd4_test_stateid_id
*stateid
;
1463 test_stateid
->ts_num_ids
= ntohl(*p
++);
1465 INIT_LIST_HEAD(&test_stateid
->ts_stateid_list
);
1467 for (i
= 0; i
< test_stateid
->ts_num_ids
; i
++) {
1468 stateid
= kmalloc(sizeof(struct nfsd4_test_stateid_id
), GFP_KERNEL
);
1470 status
= nfserrno(-ENOMEM
);
1474 defer_free(argp
, kfree
, stateid
);
1475 INIT_LIST_HEAD(&stateid
->ts_id_list
);
1476 list_add_tail(&stateid
->ts_id_list
, &test_stateid
->ts_stateid_list
);
1478 status
= nfsd4_decode_stateid(argp
, &stateid
->ts_id_stateid
);
1487 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__
, __LINE__
);
1488 status
= nfserr_bad_xdr
;
1492 static __be32
nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_destroy_clientid
*dc
)
1497 COPYMEM(&dc
->clientid
, 8);
1502 static __be32
nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs
*argp
, struct nfsd4_reclaim_complete
*rc
)
1507 READ32(rc
->rca_one_fs
);
1513 nfsd4_decode_noop(struct nfsd4_compoundargs
*argp
, void *p
)
1519 nfsd4_decode_notsupp(struct nfsd4_compoundargs
*argp
, void *p
)
1521 return nfserr_notsupp
;
1524 typedef __be32(*nfsd4_dec
)(struct nfsd4_compoundargs
*argp
, void *);
1526 static nfsd4_dec nfsd4_dec_ops
[] = {
1527 [OP_ACCESS
] = (nfsd4_dec
)nfsd4_decode_access
,
1528 [OP_CLOSE
] = (nfsd4_dec
)nfsd4_decode_close
,
1529 [OP_COMMIT
] = (nfsd4_dec
)nfsd4_decode_commit
,
1530 [OP_CREATE
] = (nfsd4_dec
)nfsd4_decode_create
,
1531 [OP_DELEGPURGE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1532 [OP_DELEGRETURN
] = (nfsd4_dec
)nfsd4_decode_delegreturn
,
1533 [OP_GETATTR
] = (nfsd4_dec
)nfsd4_decode_getattr
,
1534 [OP_GETFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1535 [OP_LINK
] = (nfsd4_dec
)nfsd4_decode_link
,
1536 [OP_LOCK
] = (nfsd4_dec
)nfsd4_decode_lock
,
1537 [OP_LOCKT
] = (nfsd4_dec
)nfsd4_decode_lockt
,
1538 [OP_LOCKU
] = (nfsd4_dec
)nfsd4_decode_locku
,
1539 [OP_LOOKUP
] = (nfsd4_dec
)nfsd4_decode_lookup
,
1540 [OP_LOOKUPP
] = (nfsd4_dec
)nfsd4_decode_noop
,
1541 [OP_NVERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1542 [OP_OPEN
] = (nfsd4_dec
)nfsd4_decode_open
,
1543 [OP_OPENATTR
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1544 [OP_OPEN_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_open_confirm
,
1545 [OP_OPEN_DOWNGRADE
] = (nfsd4_dec
)nfsd4_decode_open_downgrade
,
1546 [OP_PUTFH
] = (nfsd4_dec
)nfsd4_decode_putfh
,
1547 [OP_PUTPUBFH
] = (nfsd4_dec
)nfsd4_decode_putpubfh
,
1548 [OP_PUTROOTFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1549 [OP_READ
] = (nfsd4_dec
)nfsd4_decode_read
,
1550 [OP_READDIR
] = (nfsd4_dec
)nfsd4_decode_readdir
,
1551 [OP_READLINK
] = (nfsd4_dec
)nfsd4_decode_noop
,
1552 [OP_REMOVE
] = (nfsd4_dec
)nfsd4_decode_remove
,
1553 [OP_RENAME
] = (nfsd4_dec
)nfsd4_decode_rename
,
1554 [OP_RENEW
] = (nfsd4_dec
)nfsd4_decode_renew
,
1555 [OP_RESTOREFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1556 [OP_SAVEFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1557 [OP_SECINFO
] = (nfsd4_dec
)nfsd4_decode_secinfo
,
1558 [OP_SETATTR
] = (nfsd4_dec
)nfsd4_decode_setattr
,
1559 [OP_SETCLIENTID
] = (nfsd4_dec
)nfsd4_decode_setclientid
,
1560 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_setclientid_confirm
,
1561 [OP_VERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1562 [OP_WRITE
] = (nfsd4_dec
)nfsd4_decode_write
,
1563 [OP_RELEASE_LOCKOWNER
] = (nfsd4_dec
)nfsd4_decode_release_lockowner
,
1565 /* new operations for NFSv4.1 */
1566 [OP_BACKCHANNEL_CTL
] = (nfsd4_dec
)nfsd4_decode_backchannel_ctl
,
1567 [OP_BIND_CONN_TO_SESSION
]= (nfsd4_dec
)nfsd4_decode_bind_conn_to_session
,
1568 [OP_EXCHANGE_ID
] = (nfsd4_dec
)nfsd4_decode_exchange_id
,
1569 [OP_CREATE_SESSION
] = (nfsd4_dec
)nfsd4_decode_create_session
,
1570 [OP_DESTROY_SESSION
] = (nfsd4_dec
)nfsd4_decode_destroy_session
,
1571 [OP_FREE_STATEID
] = (nfsd4_dec
)nfsd4_decode_free_stateid
,
1572 [OP_GET_DIR_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1573 [OP_GETDEVICEINFO
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1574 [OP_GETDEVICELIST
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1575 [OP_LAYOUTCOMMIT
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1576 [OP_LAYOUTGET
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1577 [OP_LAYOUTRETURN
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1578 [OP_SECINFO_NO_NAME
] = (nfsd4_dec
)nfsd4_decode_secinfo_no_name
,
1579 [OP_SEQUENCE
] = (nfsd4_dec
)nfsd4_decode_sequence
,
1580 [OP_SET_SSV
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1581 [OP_TEST_STATEID
] = (nfsd4_dec
)nfsd4_decode_test_stateid
,
1582 [OP_WANT_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1583 [OP_DESTROY_CLIENTID
] = (nfsd4_dec
)nfsd4_decode_destroy_clientid
,
1584 [OP_RECLAIM_COMPLETE
] = (nfsd4_dec
)nfsd4_decode_reclaim_complete
,
1588 nfsd4_opnum_in_range(struct nfsd4_compoundargs
*argp
, struct nfsd4_op
*op
)
1590 if (op
->opnum
< FIRST_NFS4_OP
)
1592 else if (argp
->minorversion
== 0 && op
->opnum
> LAST_NFS40_OP
)
1594 else if (argp
->minorversion
== 1 && op
->opnum
> LAST_NFS41_OP
)
1596 else if (argp
->minorversion
== 2 && op
->opnum
> LAST_NFS42_OP
)
1602 * Return a rough estimate of the maximum possible reply size. Note the
1603 * estimate includes rpc headers so is meant to be passed to
1604 * svc_reserve, not svc_reserve_auth.
1606 * Also note the current compound encoding permits only one operation to
1607 * use pages beyond the first one, so the maximum possible length is the
1608 * maximum over these values, not the sum.
1610 static int nfsd4_max_reply(u32 opnum
)
1616 * Both of these ops take a single page for data and put
1617 * the head and tail in another page:
1619 return 2 * PAGE_SIZE
;
1628 nfsd4_decode_compound(struct nfsd4_compoundargs
*argp
)
1631 struct nfsd4_op
*op
;
1632 bool cachethis
= false;
1633 int max_reply
= PAGE_SIZE
;
1637 READ32(argp
->taglen
);
1638 READ_BUF(argp
->taglen
+ 8);
1639 SAVEMEM(argp
->tag
, argp
->taglen
);
1640 READ32(argp
->minorversion
);
1641 READ32(argp
->opcnt
);
1643 if (argp
->taglen
> NFSD4_MAX_TAGLEN
)
1645 if (argp
->opcnt
> 100)
1648 if (argp
->opcnt
> ARRAY_SIZE(argp
->iops
)) {
1649 argp
->ops
= kmalloc(argp
->opcnt
* sizeof(*argp
->ops
), GFP_KERNEL
);
1651 argp
->ops
= argp
->iops
;
1652 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1657 if (argp
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
1660 for (i
= 0; i
< argp
->opcnt
; i
++) {
1667 if (nfsd4_opnum_in_range(argp
, op
))
1668 op
->status
= nfsd4_dec_ops
[op
->opnum
](argp
, &op
->u
);
1670 op
->opnum
= OP_ILLEGAL
;
1671 op
->status
= nfserr_op_illegal
;
1679 * We'll try to cache the result in the DRC if any one
1680 * op in the compound wants to be cached:
1682 cachethis
|= nfsd4_cache_this_op(op
);
1684 max_reply
= max(max_reply
, nfsd4_max_reply(op
->opnum
));
1686 /* Sessions make the DRC unnecessary: */
1687 if (argp
->minorversion
)
1689 if (max_reply
!= INT_MAX
)
1690 svc_reserve(argp
->rqstp
, max_reply
);
1691 argp
->rqstp
->rq_cachetype
= cachethis
? RC_REPLBUFF
: RC_NOCACHE
;
1696 #define WRITE32(n) *p++ = htonl(n)
1697 #define WRITE64(n) do { \
1698 *p++ = htonl((u32)((n) >> 32)); \
1699 *p++ = htonl((u32)(n)); \
1701 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1702 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1703 memcpy(p, ptr, nbytes); \
1704 p += XDR_QUADLEN(nbytes); \
1707 static void write32(__be32
**p
, u32 n
)
1712 static void write64(__be32
**p
, u64 n
)
1714 write32(p
, (n
>> 32));
1718 static void write_change(__be32
**p
, struct kstat
*stat
, struct inode
*inode
)
1720 if (IS_I_VERSION(inode
)) {
1721 write64(p
, inode
->i_version
);
1723 write32(p
, stat
->ctime
.tv_sec
);
1724 write32(p
, stat
->ctime
.tv_nsec
);
1728 static void write_cinfo(__be32
**p
, struct nfsd4_change_info
*c
)
1730 write32(p
, c
->atomic
);
1731 if (c
->change_supported
) {
1732 write64(p
, c
->before_change
);
1733 write64(p
, c
->after_change
);
1735 write32(p
, c
->before_ctime_sec
);
1736 write32(p
, c
->before_ctime_nsec
);
1737 write32(p
, c
->after_ctime_sec
);
1738 write32(p
, c
->after_ctime_nsec
);
1742 #define RESERVE_SPACE(nbytes) do { \
1744 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1746 #define ADJUST_ARGS() resp->p = p
1748 /* Encode as an array of strings the string given with components
1749 * separated @sep, escaped with esc_enter and esc_exit.
1751 static __be32
nfsd4_encode_components_esc(char sep
, char *components
,
1752 __be32
**pp
, int *buflen
,
1753 char esc_enter
, char esc_exit
)
1757 int strlen
, count
=0;
1758 char *str
, *end
, *next
;
1760 dprintk("nfsd4_encode_components(%s)\n", components
);
1761 if ((*buflen
-= 4) < 0)
1762 return nfserr_resource
;
1763 WRITE32(0); /* We will fill this in with @count later */
1764 end
= str
= components
;
1766 bool found_esc
= false;
1768 /* try to parse as esc_start, ..., esc_end, sep */
1769 if (*str
== esc_enter
) {
1770 for (; *end
&& (*end
!= esc_exit
); end
++)
1771 /* find esc_exit or end of string */;
1773 if (*end
&& (!*next
|| *next
== sep
)) {
1780 for (; *end
&& (*end
!= sep
); end
++)
1781 /* find sep or end of string */;
1785 if ((*buflen
-= ((XDR_QUADLEN(strlen
) << 2) + 4)) < 0)
1786 return nfserr_resource
;
1788 WRITEMEM(str
, strlen
);
1801 /* Encode as an array of strings the string given with components
1804 static __be32
nfsd4_encode_components(char sep
, char *components
,
1805 __be32
**pp
, int *buflen
)
1807 return nfsd4_encode_components_esc(sep
, components
, pp
, buflen
, 0, 0);
1811 * encode a location element of a fs_locations structure
1813 static __be32
nfsd4_encode_fs_location4(struct nfsd4_fs_location
*location
,
1814 __be32
**pp
, int *buflen
)
1819 status
= nfsd4_encode_components_esc(':', location
->hosts
, &p
, buflen
,
1823 status
= nfsd4_encode_components('/', location
->path
, &p
, buflen
);
1831 * Encode a path in RFC3530 'pathname4' format
1833 static __be32
nfsd4_encode_path(const struct path
*root
,
1834 const struct path
*path
, __be32
**pp
, int *buflen
)
1836 struct path cur
= *path
;
1838 struct dentry
**components
= NULL
;
1839 unsigned int ncomponents
= 0;
1840 __be32 err
= nfserr_jukebox
;
1842 dprintk("nfsd4_encode_components(");
1845 /* First walk the path up to the nfsd root, and store the
1846 * dentries/path components in an array.
1849 if (cur
.dentry
== root
->dentry
&& cur
.mnt
== root
->mnt
)
1851 if (cur
.dentry
== cur
.mnt
->mnt_root
) {
1852 if (follow_up(&cur
))
1856 if ((ncomponents
& 15) == 0) {
1857 struct dentry
**new;
1858 new = krealloc(components
,
1859 sizeof(*new) * (ncomponents
+ 16),
1865 components
[ncomponents
++] = cur
.dentry
;
1866 cur
.dentry
= dget_parent(cur
.dentry
);
1872 WRITE32(ncomponents
);
1874 while (ncomponents
) {
1875 struct dentry
*dentry
= components
[ncomponents
- 1];
1878 spin_lock(&dentry
->d_lock
);
1879 len
= dentry
->d_name
.len
;
1880 *buflen
-= 4 + (XDR_QUADLEN(len
) << 2);
1882 spin_unlock(&dentry
->d_lock
);
1886 WRITEMEM(dentry
->d_name
.name
, len
);
1887 dprintk("/%s", dentry
->d_name
.name
);
1888 spin_unlock(&dentry
->d_lock
);
1898 dput(components
[--ncomponents
]);
1904 static __be32
nfsd4_encode_fsloc_fsroot(struct svc_rqst
*rqstp
,
1905 const struct path
*path
, __be32
**pp
, int *buflen
)
1907 struct svc_export
*exp_ps
;
1910 exp_ps
= rqst_find_fsidzero_export(rqstp
);
1912 return nfserrno(PTR_ERR(exp_ps
));
1913 res
= nfsd4_encode_path(&exp_ps
->ex_path
, path
, pp
, buflen
);
1919 * encode a fs_locations structure
1921 static __be32
nfsd4_encode_fs_locations(struct svc_rqst
*rqstp
,
1922 struct svc_export
*exp
,
1923 __be32
**pp
, int *buflen
)
1928 struct nfsd4_fs_locations
*fslocs
= &exp
->ex_fslocs
;
1930 status
= nfsd4_encode_fsloc_fsroot(rqstp
, &exp
->ex_path
, &p
, buflen
);
1933 if ((*buflen
-= 4) < 0)
1934 return nfserr_resource
;
1935 WRITE32(fslocs
->locations_count
);
1936 for (i
=0; i
<fslocs
->locations_count
; i
++) {
1937 status
= nfsd4_encode_fs_location4(&fslocs
->locations
[i
],
1946 static u32
nfs4_file_type(umode_t mode
)
1948 switch (mode
& S_IFMT
) {
1949 case S_IFIFO
: return NF4FIFO
;
1950 case S_IFCHR
: return NF4CHR
;
1951 case S_IFDIR
: return NF4DIR
;
1952 case S_IFBLK
: return NF4BLK
;
1953 case S_IFLNK
: return NF4LNK
;
1954 case S_IFREG
: return NF4REG
;
1955 case S_IFSOCK
: return NF4SOCK
;
1956 default: return NF4BAD
;
1961 nfsd4_encode_name(struct svc_rqst
*rqstp
, int whotype
, kuid_t uid
, kgid_t gid
,
1962 __be32
**p
, int *buflen
)
1966 if (*buflen
< (XDR_QUADLEN(IDMAP_NAMESZ
) << 2) + 4)
1967 return nfserr_resource
;
1968 if (whotype
!= NFS4_ACL_WHO_NAMED
)
1969 status
= nfs4_acl_write_who(whotype
, (u8
*)(*p
+ 1));
1970 else if (gid_valid(gid
))
1971 status
= nfsd_map_gid_to_name(rqstp
, gid
, (u8
*)(*p
+ 1));
1973 status
= nfsd_map_uid_to_name(rqstp
, uid
, (u8
*)(*p
+ 1));
1975 return nfserrno(status
);
1976 *p
= xdr_encode_opaque(*p
, NULL
, status
);
1977 *buflen
-= (XDR_QUADLEN(status
) << 2) + 4;
1978 BUG_ON(*buflen
< 0);
1982 static inline __be32
1983 nfsd4_encode_user(struct svc_rqst
*rqstp
, kuid_t user
, __be32
**p
, int *buflen
)
1985 return nfsd4_encode_name(rqstp
, NFS4_ACL_WHO_NAMED
, user
, INVALID_GID
,
1989 static inline __be32
1990 nfsd4_encode_group(struct svc_rqst
*rqstp
, kgid_t group
, __be32
**p
, int *buflen
)
1992 return nfsd4_encode_name(rqstp
, NFS4_ACL_WHO_NAMED
, INVALID_UID
, group
,
1996 static inline __be32
1997 nfsd4_encode_aclname(struct svc_rqst
*rqstp
, struct nfs4_ace
*ace
,
1998 __be32
**p
, int *buflen
)
2000 kuid_t uid
= INVALID_UID
;
2001 kgid_t gid
= INVALID_GID
;
2003 if (ace
->whotype
== NFS4_ACL_WHO_NAMED
) {
2004 if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
2009 return nfsd4_encode_name(rqstp
, ace
->whotype
, uid
, gid
, p
, buflen
);
2012 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2013 FATTR4_WORD0_RDATTR_ERROR)
2014 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2016 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2017 static inline __be32
2018 nfsd4_encode_security_label(struct svc_rqst
*rqstp
, void *context
, int len
, __be32
**pp
, int *buflen
)
2022 if (*buflen
< ((XDR_QUADLEN(len
) << 2) + 4 + 4 + 4))
2023 return nfserr_resource
;
2026 * For now we use a 0 here to indicate the null translation; in
2027 * the future we may place a call to translation code here.
2029 if ((*buflen
-= 8) < 0)
2030 return nfserr_resource
;
2032 WRITE32(0); /* lfs */
2033 WRITE32(0); /* pi */
2034 p
= xdr_encode_opaque(p
, context
, len
);
2035 *buflen
-= (XDR_QUADLEN(len
) << 2) + 4;
2041 static inline __be32
2042 nfsd4_encode_security_label(struct svc_rqst
*rqstp
, void *context
, int len
, __be32
**pp
, int *buflen
)
2046 static __be32
fattr_handle_absent_fs(u32
*bmval0
, u32
*bmval1
, u32
*rdattr_err
)
2048 /* As per referral draft: */
2049 if (*bmval0
& ~WORD0_ABSENT_FS_ATTRS
||
2050 *bmval1
& ~WORD1_ABSENT_FS_ATTRS
) {
2051 if (*bmval0
& FATTR4_WORD0_RDATTR_ERROR
||
2052 *bmval0
& FATTR4_WORD0_FS_LOCATIONS
)
2053 *rdattr_err
= NFSERR_MOVED
;
2055 return nfserr_moved
;
2057 *bmval0
&= WORD0_ABSENT_FS_ATTRS
;
2058 *bmval1
&= WORD1_ABSENT_FS_ATTRS
;
2063 static int get_parent_attributes(struct svc_export
*exp
, struct kstat
*stat
)
2065 struct path path
= exp
->ex_path
;
2069 while (follow_up(&path
)) {
2070 if (path
.dentry
!= path
.mnt
->mnt_root
)
2073 err
= vfs_getattr(&path
, stat
);
2079 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2082 * countp is the buffer size in _words_
2085 nfsd4_encode_fattr(struct svc_fh
*fhp
, struct svc_export
*exp
,
2086 struct dentry
*dentry
, __be32
**buffer
, int count
, u32
*bmval
,
2087 struct svc_rqst
*rqstp
, int ignore_crossmnt
)
2089 u32 bmval0
= bmval
[0];
2090 u32 bmval1
= bmval
[1];
2091 u32 bmval2
= bmval
[2];
2093 struct svc_fh tempfh
;
2094 struct kstatfs statfs
;
2095 int buflen
= count
<< 2;
2100 __be32
*p
= *buffer
;
2104 struct nfs4_acl
*acl
= NULL
;
2105 void *context
= NULL
;
2107 bool contextsupport
= false;
2108 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2109 u32 minorversion
= resp
->cstate
.minorversion
;
2110 struct path path
= {
2111 .mnt
= exp
->ex_path
.mnt
,
2114 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2116 BUG_ON(bmval1
& NFSD_WRITEONLY_ATTRS_WORD1
);
2117 BUG_ON(bmval0
& ~nfsd_suppattrs0(minorversion
));
2118 BUG_ON(bmval1
& ~nfsd_suppattrs1(minorversion
));
2119 BUG_ON(bmval2
& ~nfsd_suppattrs2(minorversion
));
2121 if (exp
->ex_fslocs
.migrated
) {
2123 status
= fattr_handle_absent_fs(&bmval0
, &bmval1
, &rdattr_err
);
2128 err
= vfs_getattr(&path
, &stat
);
2131 if ((bmval0
& (FATTR4_WORD0_FILES_FREE
| FATTR4_WORD0_FILES_TOTAL
|
2132 FATTR4_WORD0_MAXNAME
)) ||
2133 (bmval1
& (FATTR4_WORD1_SPACE_AVAIL
| FATTR4_WORD1_SPACE_FREE
|
2134 FATTR4_WORD1_SPACE_TOTAL
))) {
2135 err
= vfs_statfs(&path
, &statfs
);
2139 if ((bmval0
& (FATTR4_WORD0_FILEHANDLE
| FATTR4_WORD0_FSID
)) && !fhp
) {
2140 fh_init(&tempfh
, NFS4_FHSIZE
);
2141 status
= fh_compose(&tempfh
, exp
, dentry
, NULL
);
2146 if (bmval0
& (FATTR4_WORD0_ACL
| FATTR4_WORD0_ACLSUPPORT
2147 | FATTR4_WORD0_SUPPORTED_ATTRS
)) {
2148 err
= nfsd4_get_nfs4_acl(rqstp
, dentry
, &acl
);
2149 aclsupport
= (err
== 0);
2150 if (bmval0
& FATTR4_WORD0_ACL
) {
2151 if (err
== -EOPNOTSUPP
)
2152 bmval0
&= ~FATTR4_WORD0_ACL
;
2153 else if (err
== -EINVAL
) {
2154 status
= nfserr_attrnotsupp
;
2156 } else if (err
!= 0)
2161 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2162 if ((bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) ||
2163 bmval
[0] & FATTR4_WORD0_SUPPORTED_ATTRS
) {
2164 err
= security_inode_getsecctx(dentry
->d_inode
,
2165 &context
, &contextlen
);
2166 contextsupport
= (err
== 0);
2167 if (bmval2
& FATTR4_WORD2_SECURITY_LABEL
) {
2168 if (err
== -EOPNOTSUPP
)
2169 bmval2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
2174 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2177 if ((buflen
-= 16) < 0)
2183 } else if (bmval1
) {
2184 if ((buflen
-= 12) < 0)
2190 if ((buflen
-= 8) < 0)
2195 attrlenp
= p
++; /* to be backfilled later */
2197 if (bmval0
& FATTR4_WORD0_SUPPORTED_ATTRS
) {
2198 u32 word0
= nfsd_suppattrs0(minorversion
);
2199 u32 word1
= nfsd_suppattrs1(minorversion
);
2200 u32 word2
= nfsd_suppattrs2(minorversion
);
2203 word0
&= ~FATTR4_WORD0_ACL
;
2204 if (!contextsupport
)
2205 word2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
2207 if ((buflen
-= 12) < 0)
2213 if ((buflen
-= 16) < 0)
2221 if (bmval0
& FATTR4_WORD0_TYPE
) {
2222 if ((buflen
-= 4) < 0)
2224 dummy
= nfs4_file_type(stat
.mode
);
2225 if (dummy
== NF4BAD
)
2226 goto out_serverfault
;
2229 if (bmval0
& FATTR4_WORD0_FH_EXPIRE_TYPE
) {
2230 if ((buflen
-= 4) < 0)
2232 if (exp
->ex_flags
& NFSEXP_NOSUBTREECHECK
)
2233 WRITE32(NFS4_FH_PERSISTENT
);
2235 WRITE32(NFS4_FH_PERSISTENT
|NFS4_FH_VOL_RENAME
);
2237 if (bmval0
& FATTR4_WORD0_CHANGE
) {
2238 if ((buflen
-= 8) < 0)
2240 write_change(&p
, &stat
, dentry
->d_inode
);
2242 if (bmval0
& FATTR4_WORD0_SIZE
) {
2243 if ((buflen
-= 8) < 0)
2247 if (bmval0
& FATTR4_WORD0_LINK_SUPPORT
) {
2248 if ((buflen
-= 4) < 0)
2252 if (bmval0
& FATTR4_WORD0_SYMLINK_SUPPORT
) {
2253 if ((buflen
-= 4) < 0)
2257 if (bmval0
& FATTR4_WORD0_NAMED_ATTR
) {
2258 if ((buflen
-= 4) < 0)
2262 if (bmval0
& FATTR4_WORD0_FSID
) {
2263 if ((buflen
-= 16) < 0)
2265 if (exp
->ex_fslocs
.migrated
) {
2266 WRITE64(NFS4_REFERRAL_FSID_MAJOR
);
2267 WRITE64(NFS4_REFERRAL_FSID_MINOR
);
2268 } else switch(fsid_source(fhp
)) {
2269 case FSIDSOURCE_FSID
:
2270 WRITE64((u64
)exp
->ex_fsid
);
2273 case FSIDSOURCE_DEV
:
2275 WRITE32(MAJOR(stat
.dev
));
2277 WRITE32(MINOR(stat
.dev
));
2279 case FSIDSOURCE_UUID
:
2280 WRITEMEM(exp
->ex_uuid
, 16);
2284 if (bmval0
& FATTR4_WORD0_UNIQUE_HANDLES
) {
2285 if ((buflen
-= 4) < 0)
2289 if (bmval0
& FATTR4_WORD0_LEASE_TIME
) {
2290 if ((buflen
-= 4) < 0)
2292 WRITE32(nn
->nfsd4_lease
);
2294 if (bmval0
& FATTR4_WORD0_RDATTR_ERROR
) {
2295 if ((buflen
-= 4) < 0)
2297 WRITE32(rdattr_err
);
2299 if (bmval0
& FATTR4_WORD0_ACL
) {
2300 struct nfs4_ace
*ace
;
2303 if ((buflen
-= 4) < 0)
2309 if ((buflen
-= 4) < 0)
2311 WRITE32(acl
->naces
);
2313 for (ace
= acl
->aces
; ace
< acl
->aces
+ acl
->naces
; ace
++) {
2314 if ((buflen
-= 4*3) < 0)
2318 WRITE32(ace
->access_mask
& NFS4_ACE_MASK_ALL
);
2319 status
= nfsd4_encode_aclname(rqstp
, ace
, &p
, &buflen
);
2320 if (status
== nfserr_resource
)
2327 if (bmval0
& FATTR4_WORD0_ACLSUPPORT
) {
2328 if ((buflen
-= 4) < 0)
2330 WRITE32(aclsupport
?
2331 ACL4_SUPPORT_ALLOW_ACL
|ACL4_SUPPORT_DENY_ACL
: 0);
2333 if (bmval0
& FATTR4_WORD0_CANSETTIME
) {
2334 if ((buflen
-= 4) < 0)
2338 if (bmval0
& FATTR4_WORD0_CASE_INSENSITIVE
) {
2339 if ((buflen
-= 4) < 0)
2343 if (bmval0
& FATTR4_WORD0_CASE_PRESERVING
) {
2344 if ((buflen
-= 4) < 0)
2348 if (bmval0
& FATTR4_WORD0_CHOWN_RESTRICTED
) {
2349 if ((buflen
-= 4) < 0)
2353 if (bmval0
& FATTR4_WORD0_FILEHANDLE
) {
2354 buflen
-= (XDR_QUADLEN(fhp
->fh_handle
.fh_size
) << 2) + 4;
2357 WRITE32(fhp
->fh_handle
.fh_size
);
2358 WRITEMEM(&fhp
->fh_handle
.fh_base
, fhp
->fh_handle
.fh_size
);
2360 if (bmval0
& FATTR4_WORD0_FILEID
) {
2361 if ((buflen
-= 8) < 0)
2365 if (bmval0
& FATTR4_WORD0_FILES_AVAIL
) {
2366 if ((buflen
-= 8) < 0)
2368 WRITE64((u64
) statfs
.f_ffree
);
2370 if (bmval0
& FATTR4_WORD0_FILES_FREE
) {
2371 if ((buflen
-= 8) < 0)
2373 WRITE64((u64
) statfs
.f_ffree
);
2375 if (bmval0
& FATTR4_WORD0_FILES_TOTAL
) {
2376 if ((buflen
-= 8) < 0)
2378 WRITE64((u64
) statfs
.f_files
);
2380 if (bmval0
& FATTR4_WORD0_FS_LOCATIONS
) {
2381 status
= nfsd4_encode_fs_locations(rqstp
, exp
, &p
, &buflen
);
2382 if (status
== nfserr_resource
)
2387 if (bmval0
& FATTR4_WORD0_HOMOGENEOUS
) {
2388 if ((buflen
-= 4) < 0)
2392 if (bmval0
& FATTR4_WORD0_MAXFILESIZE
) {
2393 if ((buflen
-= 8) < 0)
2395 WRITE64(exp
->ex_path
.mnt
->mnt_sb
->s_maxbytes
);
2397 if (bmval0
& FATTR4_WORD0_MAXLINK
) {
2398 if ((buflen
-= 4) < 0)
2402 if (bmval0
& FATTR4_WORD0_MAXNAME
) {
2403 if ((buflen
-= 4) < 0)
2405 WRITE32(statfs
.f_namelen
);
2407 if (bmval0
& FATTR4_WORD0_MAXREAD
) {
2408 if ((buflen
-= 8) < 0)
2410 WRITE64((u64
) svc_max_payload(rqstp
));
2412 if (bmval0
& FATTR4_WORD0_MAXWRITE
) {
2413 if ((buflen
-= 8) < 0)
2415 WRITE64((u64
) svc_max_payload(rqstp
));
2417 if (bmval1
& FATTR4_WORD1_MODE
) {
2418 if ((buflen
-= 4) < 0)
2420 WRITE32(stat
.mode
& S_IALLUGO
);
2422 if (bmval1
& FATTR4_WORD1_NO_TRUNC
) {
2423 if ((buflen
-= 4) < 0)
2427 if (bmval1
& FATTR4_WORD1_NUMLINKS
) {
2428 if ((buflen
-= 4) < 0)
2430 WRITE32(stat
.nlink
);
2432 if (bmval1
& FATTR4_WORD1_OWNER
) {
2433 status
= nfsd4_encode_user(rqstp
, stat
.uid
, &p
, &buflen
);
2434 if (status
== nfserr_resource
)
2439 if (bmval1
& FATTR4_WORD1_OWNER_GROUP
) {
2440 status
= nfsd4_encode_group(rqstp
, stat
.gid
, &p
, &buflen
);
2441 if (status
== nfserr_resource
)
2446 if (bmval1
& FATTR4_WORD1_RAWDEV
) {
2447 if ((buflen
-= 8) < 0)
2449 WRITE32((u32
) MAJOR(stat
.rdev
));
2450 WRITE32((u32
) MINOR(stat
.rdev
));
2452 if (bmval1
& FATTR4_WORD1_SPACE_AVAIL
) {
2453 if ((buflen
-= 8) < 0)
2455 dummy64
= (u64
)statfs
.f_bavail
* (u64
)statfs
.f_bsize
;
2458 if (bmval1
& FATTR4_WORD1_SPACE_FREE
) {
2459 if ((buflen
-= 8) < 0)
2461 dummy64
= (u64
)statfs
.f_bfree
* (u64
)statfs
.f_bsize
;
2464 if (bmval1
& FATTR4_WORD1_SPACE_TOTAL
) {
2465 if ((buflen
-= 8) < 0)
2467 dummy64
= (u64
)statfs
.f_blocks
* (u64
)statfs
.f_bsize
;
2470 if (bmval1
& FATTR4_WORD1_SPACE_USED
) {
2471 if ((buflen
-= 8) < 0)
2473 dummy64
= (u64
)stat
.blocks
<< 9;
2476 if (bmval1
& FATTR4_WORD1_TIME_ACCESS
) {
2477 if ((buflen
-= 12) < 0)
2479 WRITE64((s64
)stat
.atime
.tv_sec
);
2480 WRITE32(stat
.atime
.tv_nsec
);
2482 if (bmval1
& FATTR4_WORD1_TIME_DELTA
) {
2483 if ((buflen
-= 12) < 0)
2489 if (bmval1
& FATTR4_WORD1_TIME_METADATA
) {
2490 if ((buflen
-= 12) < 0)
2492 WRITE64((s64
)stat
.ctime
.tv_sec
);
2493 WRITE32(stat
.ctime
.tv_nsec
);
2495 if (bmval1
& FATTR4_WORD1_TIME_MODIFY
) {
2496 if ((buflen
-= 12) < 0)
2498 WRITE64((s64
)stat
.mtime
.tv_sec
);
2499 WRITE32(stat
.mtime
.tv_nsec
);
2501 if (bmval1
& FATTR4_WORD1_MOUNTED_ON_FILEID
) {
2502 if ((buflen
-= 8) < 0)
2505 * Get parent's attributes if not ignoring crossmount
2506 * and this is the root of a cross-mounted filesystem.
2508 if (ignore_crossmnt
== 0 &&
2509 dentry
== exp
->ex_path
.mnt
->mnt_root
)
2510 get_parent_attributes(exp
, &stat
);
2513 if (bmval2
& FATTR4_WORD2_SECURITY_LABEL
) {
2514 status
= nfsd4_encode_security_label(rqstp
, context
,
2515 contextlen
, &p
, &buflen
);
2519 if (bmval2
& FATTR4_WORD2_SUPPATTR_EXCLCREAT
) {
2521 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0
);
2522 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1
);
2523 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2
);
2526 *attrlenp
= htonl((char *)p
- (char *)attrlenp
- 4);
2531 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2533 security_release_secctx(context
, contextlen
);
2534 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2540 status
= nfserrno(err
);
2543 status
= nfserr_resource
;
2546 status
= nfserr_serverfault
;
2550 static inline int attributes_need_mount(u32
*bmval
)
2552 if (bmval
[0] & ~(FATTR4_WORD0_RDATTR_ERROR
| FATTR4_WORD0_LEASE_TIME
))
2554 if (bmval
[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID
)
2560 nfsd4_encode_dirent_fattr(struct nfsd4_readdir
*cd
,
2561 const char *name
, int namlen
, __be32
**p
, int buflen
)
2563 struct svc_export
*exp
= cd
->rd_fhp
->fh_export
;
2564 struct dentry
*dentry
;
2566 int ignore_crossmnt
= 0;
2568 dentry
= lookup_one_len(name
, cd
->rd_fhp
->fh_dentry
, namlen
);
2570 return nfserrno(PTR_ERR(dentry
));
2571 if (!dentry
->d_inode
) {
2573 * nfsd_buffered_readdir drops the i_mutex between
2574 * readdir and calling this callback, leaving a window
2575 * where this directory entry could have gone away.
2578 return nfserr_noent
;
2583 * In the case of a mountpoint, the client may be asking for
2584 * attributes that are only properties of the underlying filesystem
2585 * as opposed to the cross-mounted file system. In such a case,
2586 * we will not follow the cross mount and will fill the attribtutes
2587 * directly from the mountpoint dentry.
2589 if (nfsd_mountpoint(dentry
, exp
)) {
2592 if (!(exp
->ex_flags
& NFSEXP_V4ROOT
)
2593 && !attributes_need_mount(cd
->rd_bmval
)) {
2594 ignore_crossmnt
= 1;
2598 * Why the heck aren't we just using nfsd_lookup??
2599 * Different "."/".." handling? Something else?
2600 * At least, add a comment here to explain....
2602 err
= nfsd_cross_mnt(cd
->rd_rqstp
, &dentry
, &exp
);
2604 nfserr
= nfserrno(err
);
2607 nfserr
= check_nfsd_access(exp
, cd
->rd_rqstp
);
2613 nfserr
= nfsd4_encode_fattr(NULL
, exp
, dentry
, p
, buflen
, cd
->rd_bmval
,
2614 cd
->rd_rqstp
, ignore_crossmnt
);
2622 nfsd4_encode_rdattr_error(__be32
*p
, int buflen
, __be32 nfserr
)
2629 *p
++ = htonl(FATTR4_WORD0_RDATTR_ERROR
); /* bmval0 */
2630 *p
++ = htonl(0); /* bmval1 */
2633 *p
++ = nfserr
; /* no htonl */
2634 *attrlenp
= htonl((char *)p
- (char *)attrlenp
- 4);
2639 nfsd4_encode_dirent(void *ccdv
, const char *name
, int namlen
,
2640 loff_t offset
, u64 ino
, unsigned int d_type
)
2642 struct readdir_cd
*ccd
= ccdv
;
2643 struct nfsd4_readdir
*cd
= container_of(ccd
, struct nfsd4_readdir
, common
);
2645 __be32
*p
= cd
->buffer
;
2647 __be32 nfserr
= nfserr_toosmall
;
2649 /* In nfsv4, "." and ".." never make it onto the wire.. */
2650 if (name
&& isdotent(name
, namlen
)) {
2651 cd
->common
.err
= nfs_ok
;
2656 xdr_encode_hyper(cd
->offset
, (u64
) offset
);
2658 buflen
= cd
->buflen
- 4 - XDR_QUADLEN(namlen
);
2662 *p
++ = xdr_one
; /* mark entry present */
2664 p
= xdr_encode_hyper(p
, NFS_OFFSET_MAX
); /* offset of next entry */
2665 p
= xdr_encode_array(p
, name
, namlen
); /* name length & name */
2667 nfserr
= nfsd4_encode_dirent_fattr(cd
, name
, namlen
, &p
, buflen
);
2671 case nfserr_resource
:
2672 nfserr
= nfserr_toosmall
;
2678 * If the client requested the RDATTR_ERROR attribute,
2679 * we stuff the error code into this attribute
2680 * and continue. If this attribute was not requested,
2681 * then in accordance with the spec, we fail the
2682 * entire READDIR operation(!)
2684 if (!(cd
->rd_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
))
2686 p
= nfsd4_encode_rdattr_error(p
, buflen
, nfserr
);
2688 nfserr
= nfserr_toosmall
;
2692 cd
->buflen
-= (p
- cd
->buffer
);
2694 cd
->offset
= cookiep
;
2696 cd
->common
.err
= nfs_ok
;
2699 cd
->common
.err
= nfserr
;
2704 nfsd4_encode_stateid(struct nfsd4_compoundres
*resp
, stateid_t
*sid
)
2708 RESERVE_SPACE(sizeof(stateid_t
));
2709 WRITE32(sid
->si_generation
);
2710 WRITEMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
2715 nfsd4_encode_access(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_access
*access
)
2721 WRITE32(access
->ac_supported
);
2722 WRITE32(access
->ac_resp_access
);
2728 static __be32
nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_bind_conn_to_session
*bcts
)
2733 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN
+ 8);
2734 WRITEMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
2736 /* Sorry, we do not yet support RDMA over 4.1: */
2744 nfsd4_encode_close(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_close
*close
)
2747 nfsd4_encode_stateid(resp
, &close
->cl_stateid
);
2754 nfsd4_encode_commit(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_commit
*commit
)
2759 RESERVE_SPACE(NFS4_VERIFIER_SIZE
);
2760 WRITEMEM(commit
->co_verf
.data
, NFS4_VERIFIER_SIZE
);
2767 nfsd4_encode_create(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_create
*create
)
2773 write_cinfo(&p
, &create
->cr_cinfo
);
2775 WRITE32(create
->cr_bmval
[0]);
2776 WRITE32(create
->cr_bmval
[1]);
2783 nfsd4_encode_getattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_getattr
*getattr
)
2785 struct svc_fh
*fhp
= getattr
->ga_fhp
;
2791 buflen
= resp
->end
- resp
->p
- (COMPOUND_ERR_SLACK_SPACE
>> 2);
2792 nfserr
= nfsd4_encode_fattr(fhp
, fhp
->fh_export
, fhp
->fh_dentry
,
2793 &resp
->p
, buflen
, getattr
->ga_bmval
,
2799 nfsd4_encode_getfh(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct svc_fh
**fhpp
)
2801 struct svc_fh
*fhp
= *fhpp
;
2806 len
= fhp
->fh_handle
.fh_size
;
2807 RESERVE_SPACE(len
+ 4);
2809 WRITEMEM(&fhp
->fh_handle
.fh_base
, len
);
2816 * Including all fields other than the name, a LOCK4denied structure requires
2817 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2820 nfsd4_encode_lock_denied(struct nfsd4_compoundres
*resp
, struct nfsd4_lock_denied
*ld
)
2822 struct xdr_netobj
*conf
= &ld
->ld_owner
;
2825 RESERVE_SPACE(32 + XDR_LEN(conf
->len
));
2826 WRITE64(ld
->ld_start
);
2827 WRITE64(ld
->ld_length
);
2828 WRITE32(ld
->ld_type
);
2830 WRITEMEM(&ld
->ld_clientid
, 8);
2832 WRITEMEM(conf
->data
, conf
->len
);
2834 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2835 WRITE64((u64
)0); /* clientid */
2836 WRITE32(0); /* length of owner name */
2842 nfsd4_encode_lock(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lock
*lock
)
2845 nfsd4_encode_stateid(resp
, &lock
->lk_resp_stateid
);
2846 else if (nfserr
== nfserr_denied
)
2847 nfsd4_encode_lock_denied(resp
, &lock
->lk_denied
);
2853 nfsd4_encode_lockt(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lockt
*lockt
)
2855 if (nfserr
== nfserr_denied
)
2856 nfsd4_encode_lock_denied(resp
, &lockt
->lt_denied
);
2861 nfsd4_encode_locku(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_locku
*locku
)
2864 nfsd4_encode_stateid(resp
, &locku
->lu_stateid
);
2871 nfsd4_encode_link(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_link
*link
)
2877 write_cinfo(&p
, &link
->li_cinfo
);
2885 nfsd4_encode_open(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open
*open
)
2892 nfsd4_encode_stateid(resp
, &open
->op_stateid
);
2894 write_cinfo(&p
, &open
->op_cinfo
);
2895 WRITE32(open
->op_rflags
);
2897 WRITE32(open
->op_bmval
[0]);
2898 WRITE32(open
->op_bmval
[1]);
2899 WRITE32(open
->op_delegate_type
);
2902 switch (open
->op_delegate_type
) {
2903 case NFS4_OPEN_DELEGATE_NONE
:
2905 case NFS4_OPEN_DELEGATE_READ
:
2906 nfsd4_encode_stateid(resp
, &open
->op_delegate_stateid
);
2908 WRITE32(open
->op_recall
);
2911 * TODO: ACE's in delegations
2913 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
2916 WRITE32(0); /* XXX: is NULL principal ok? */
2919 case NFS4_OPEN_DELEGATE_WRITE
:
2920 nfsd4_encode_stateid(resp
, &open
->op_delegate_stateid
);
2925 * TODO: space_limit's in delegations
2927 WRITE32(NFS4_LIMIT_SIZE
);
2932 * TODO: ACE's in delegations
2934 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
2937 WRITE32(0); /* XXX: is NULL principal ok? */
2940 case NFS4_OPEN_DELEGATE_NONE_EXT
: /* 4.1 */
2941 switch (open
->op_why_no_deleg
) {
2942 case WND4_CONTENTION
:
2945 WRITE32(open
->op_why_no_deleg
);
2946 WRITE32(0); /* deleg signaling not supported yet */
2950 WRITE32(open
->op_why_no_deleg
);
2957 /* XXX save filehandle here */
2963 nfsd4_encode_open_confirm(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_confirm
*oc
)
2966 nfsd4_encode_stateid(resp
, &oc
->oc_resp_stateid
);
2972 nfsd4_encode_open_downgrade(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_downgrade
*od
)
2975 nfsd4_encode_stateid(resp
, &od
->od_stateid
);
2981 nfsd4_encode_read(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
2982 struct nfsd4_read
*read
)
2987 unsigned long maxcount
;
2993 if (resp
->xbuf
->page_len
)
2994 return nfserr_resource
;
2996 RESERVE_SPACE(8); /* eof flag and byte count */
2998 maxcount
= svc_max_payload(resp
->rqstp
);
2999 if (maxcount
> read
->rd_length
)
3000 maxcount
= read
->rd_length
;
3005 page
= *(resp
->rqstp
->rq_next_page
);
3006 if (!page
) { /* ran out of pages */
3010 resp
->rqstp
->rq_vec
[v
].iov_base
= page_address(page
);
3011 resp
->rqstp
->rq_vec
[v
].iov_len
=
3012 len
< PAGE_SIZE
? len
: PAGE_SIZE
;
3013 resp
->rqstp
->rq_next_page
++;
3019 nfserr
= nfsd_read_file(read
->rd_rqstp
, read
->rd_fhp
, read
->rd_filp
,
3020 read
->rd_offset
, resp
->rqstp
->rq_vec
, read
->rd_vlen
,
3025 eof
= (read
->rd_offset
+ maxcount
>=
3026 read
->rd_fhp
->fh_dentry
->d_inode
->i_size
);
3031 resp
->xbuf
->head
[0].iov_len
= (char*)p
3032 - (char*)resp
->xbuf
->head
[0].iov_base
;
3033 resp
->xbuf
->page_len
= maxcount
;
3035 /* Use rest of head for padding and remaining ops: */
3036 resp
->xbuf
->tail
[0].iov_base
= p
;
3037 resp
->xbuf
->tail
[0].iov_len
= 0;
3041 resp
->xbuf
->tail
[0].iov_base
+= maxcount
&3;
3042 resp
->xbuf
->tail
[0].iov_len
= 4 - (maxcount
&3);
3049 nfsd4_encode_readlink(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readlink
*readlink
)
3057 if (resp
->xbuf
->page_len
)
3058 return nfserr_resource
;
3059 if (!*resp
->rqstp
->rq_next_page
)
3060 return nfserr_resource
;
3062 page
= page_address(*(resp
->rqstp
->rq_next_page
++));
3064 maxcount
= PAGE_SIZE
;
3068 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3069 * if they would overflow the buffer. Is this kosher in NFSv4? If
3070 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3071 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3073 nfserr
= nfsd_readlink(readlink
->rl_rqstp
, readlink
->rl_fhp
, page
, &maxcount
);
3074 if (nfserr
== nfserr_isdir
)
3075 return nfserr_inval
;
3081 resp
->xbuf
->head
[0].iov_len
= (char*)p
3082 - (char*)resp
->xbuf
->head
[0].iov_base
;
3083 resp
->xbuf
->page_len
= maxcount
;
3085 /* Use rest of head for padding and remaining ops: */
3086 resp
->xbuf
->tail
[0].iov_base
= p
;
3087 resp
->xbuf
->tail
[0].iov_len
= 0;
3091 resp
->xbuf
->tail
[0].iov_base
+= maxcount
&3;
3092 resp
->xbuf
->tail
[0].iov_len
= 4 - (maxcount
&3);
3099 nfsd4_encode_readdir(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readdir
*readdir
)
3103 __be32
*page
, *savep
, *tailbase
;
3108 if (resp
->xbuf
->page_len
)
3109 return nfserr_resource
;
3110 if (!*resp
->rqstp
->rq_next_page
)
3111 return nfserr_resource
;
3113 RESERVE_SPACE(NFS4_VERIFIER_SIZE
);
3116 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3120 resp
->xbuf
->head
[0].iov_len
= ((char*)resp
->p
) - (char*)resp
->xbuf
->head
[0].iov_base
;
3123 maxcount
= PAGE_SIZE
;
3124 if (maxcount
> readdir
->rd_maxcount
)
3125 maxcount
= readdir
->rd_maxcount
;
3128 * Convert from bytes to words, account for the two words already
3129 * written, make sure to leave two words at the end for the next
3130 * pointer and eof field.
3132 maxcount
= (maxcount
>> 2) - 4;
3134 nfserr
= nfserr_toosmall
;
3138 page
= page_address(*(resp
->rqstp
->rq_next_page
++));
3139 readdir
->common
.err
= 0;
3140 readdir
->buflen
= maxcount
;
3141 readdir
->buffer
= page
;
3142 readdir
->offset
= NULL
;
3144 offset
= readdir
->rd_cookie
;
3145 nfserr
= nfsd_readdir(readdir
->rd_rqstp
, readdir
->rd_fhp
,
3147 &readdir
->common
, nfsd4_encode_dirent
);
3148 if (nfserr
== nfs_ok
&&
3149 readdir
->common
.err
== nfserr_toosmall
&&
3150 readdir
->buffer
== page
)
3151 nfserr
= nfserr_toosmall
;
3155 if (readdir
->offset
)
3156 xdr_encode_hyper(readdir
->offset
, offset
);
3158 p
= readdir
->buffer
;
3159 *p
++ = 0; /* no more entries */
3160 *p
++ = htonl(readdir
->common
.err
== nfserr_eof
);
3161 resp
->xbuf
->page_len
= ((char*)p
) -
3162 (char*)page_address(*(resp
->rqstp
->rq_next_page
-1));
3164 /* Use rest of head for padding and remaining ops: */
3165 resp
->xbuf
->tail
[0].iov_base
= tailbase
;
3166 resp
->xbuf
->tail
[0].iov_len
= 0;
3167 resp
->p
= resp
->xbuf
->tail
[0].iov_base
;
3168 resp
->end
= resp
->p
+ (PAGE_SIZE
- resp
->xbuf
->head
[0].iov_len
)/4;
3178 nfsd4_encode_remove(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_remove
*remove
)
3184 write_cinfo(&p
, &remove
->rm_cinfo
);
3191 nfsd4_encode_rename(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_rename
*rename
)
3197 write_cinfo(&p
, &rename
->rn_sinfo
);
3198 write_cinfo(&p
, &rename
->rn_tinfo
);
3205 nfsd4_do_encode_secinfo(struct nfsd4_compoundres
*resp
,
3206 __be32 nfserr
, struct svc_export
*exp
)
3208 u32 i
, nflavs
, supported
;
3209 struct exp_flavor_info
*flavs
;
3210 struct exp_flavor_info def_flavs
[2];
3211 __be32
*p
, *flavorsp
;
3212 static bool report
= true;
3216 if (exp
->ex_nflavors
) {
3217 flavs
= exp
->ex_flavors
;
3218 nflavs
= exp
->ex_nflavors
;
3219 } else { /* Handling of some defaults in absence of real secinfo: */
3221 if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_UNIX
) {
3223 flavs
[0].pseudoflavor
= RPC_AUTH_UNIX
;
3224 flavs
[1].pseudoflavor
= RPC_AUTH_NULL
;
3225 } else if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_GSS
) {
3227 flavs
[0].pseudoflavor
3228 = svcauth_gss_flavor(exp
->ex_client
);
3231 flavs
[0].pseudoflavor
3232 = exp
->ex_client
->flavour
->flavour
;
3238 flavorsp
= p
++; /* to be backfilled later */
3241 for (i
= 0; i
< nflavs
; i
++) {
3242 rpc_authflavor_t pf
= flavs
[i
].pseudoflavor
;
3243 struct rpcsec_gss_info info
;
3245 if (rpcauth_get_gssinfo(pf
, &info
) == 0) {
3247 RESERVE_SPACE(4 + 4 + info
.oid
.len
+ 4 + 4);
3248 WRITE32(RPC_AUTH_GSS
);
3249 WRITE32(info
.oid
.len
);
3250 WRITEMEM(info
.oid
.data
, info
.oid
.len
);
3252 WRITE32(info
.service
);
3254 } else if (pf
< RPC_AUTH_MAXFLAVOR
) {
3261 pr_warn("NFS: SECINFO: security flavor %u "
3262 "is not supported\n", pf
);
3266 if (nflavs
!= supported
)
3268 *flavorsp
= htonl(supported
);
3277 nfsd4_encode_secinfo(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3278 struct nfsd4_secinfo
*secinfo
)
3280 return nfsd4_do_encode_secinfo(resp
, nfserr
, secinfo
->si_exp
);
3284 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3285 struct nfsd4_secinfo_no_name
*secinfo
)
3287 return nfsd4_do_encode_secinfo(resp
, nfserr
, secinfo
->sin_exp
);
3291 * The SETATTR encode routine is special -- it always encodes a bitmap,
3292 * regardless of the error status.
3295 nfsd4_encode_setattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setattr
*setattr
)
3308 WRITE32(setattr
->sa_bmval
[0]);
3309 WRITE32(setattr
->sa_bmval
[1]);
3310 WRITE32(setattr
->sa_bmval
[2]);
3317 nfsd4_encode_setclientid(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setclientid
*scd
)
3322 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE
);
3323 WRITEMEM(&scd
->se_clientid
, 8);
3324 WRITEMEM(&scd
->se_confirm
, NFS4_VERIFIER_SIZE
);
3327 else if (nfserr
== nfserr_clid_inuse
) {
3337 nfsd4_encode_write(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_write
*write
)
3343 WRITE32(write
->wr_bytes_written
);
3344 WRITE32(write
->wr_how_written
);
3345 WRITEMEM(write
->wr_verifier
.data
, NFS4_VERIFIER_SIZE
);
3351 static const u32 nfs4_minimal_spo_must_enforce
[2] = {
3352 [1] = 1 << (OP_BIND_CONN_TO_SESSION
- 32) |
3353 1 << (OP_EXCHANGE_ID
- 32) |
3354 1 << (OP_CREATE_SESSION
- 32) |
3355 1 << (OP_DESTROY_SESSION
- 32) |
3356 1 << (OP_DESTROY_CLIENTID
- 32)
3360 nfsd4_encode_exchange_id(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3361 struct nfsd4_exchange_id
*exid
)
3367 int server_scope_sz
;
3368 uint64_t minor_id
= 0;
3373 major_id
= utsname()->nodename
;
3374 major_id_sz
= strlen(major_id
);
3375 server_scope
= utsname()->nodename
;
3376 server_scope_sz
= strlen(server_scope
);
3379 8 /* eir_clientid */ +
3380 4 /* eir_sequenceid */ +
3383 8 /* spo_must_enforce, spo_must_allow */ +
3384 8 /* so_minor_id */ +
3385 4 /* so_major_id.len */ +
3386 (XDR_QUADLEN(major_id_sz
) * 4) +
3387 4 /* eir_server_scope.len */ +
3388 (XDR_QUADLEN(server_scope_sz
) * 4) +
3389 4 /* eir_server_impl_id.count (0) */);
3391 WRITEMEM(&exid
->clientid
, 8);
3392 WRITE32(exid
->seqid
);
3393 WRITE32(exid
->flags
);
3395 WRITE32(exid
->spa_how
);
3396 switch (exid
->spa_how
) {
3400 /* spo_must_enforce bitmap: */
3402 WRITE32(nfs4_minimal_spo_must_enforce
[0]);
3403 WRITE32(nfs4_minimal_spo_must_enforce
[1]);
3404 /* empty spo_must_allow bitmap: */
3411 /* The server_owner struct */
3412 WRITE64(minor_id
); /* Minor id */
3414 WRITE32(major_id_sz
);
3415 WRITEMEM(major_id
, major_id_sz
);
3418 WRITE32(server_scope_sz
);
3419 WRITEMEM(server_scope
, server_scope_sz
);
3421 /* Implementation id */
3422 WRITE32(0); /* zero length nfs_impl_id4 array */
3428 nfsd4_encode_create_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3429 struct nfsd4_create_session
*sess
)
3437 WRITEMEM(sess
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
3438 WRITE32(sess
->seqid
);
3439 WRITE32(sess
->flags
);
3443 WRITE32(0); /* headerpadsz */
3444 WRITE32(sess
->fore_channel
.maxreq_sz
);
3445 WRITE32(sess
->fore_channel
.maxresp_sz
);
3446 WRITE32(sess
->fore_channel
.maxresp_cached
);
3447 WRITE32(sess
->fore_channel
.maxops
);
3448 WRITE32(sess
->fore_channel
.maxreqs
);
3449 WRITE32(sess
->fore_channel
.nr_rdma_attrs
);
3452 if (sess
->fore_channel
.nr_rdma_attrs
) {
3454 WRITE32(sess
->fore_channel
.rdma_attrs
);
3459 WRITE32(0); /* headerpadsz */
3460 WRITE32(sess
->back_channel
.maxreq_sz
);
3461 WRITE32(sess
->back_channel
.maxresp_sz
);
3462 WRITE32(sess
->back_channel
.maxresp_cached
);
3463 WRITE32(sess
->back_channel
.maxops
);
3464 WRITE32(sess
->back_channel
.maxreqs
);
3465 WRITE32(sess
->back_channel
.nr_rdma_attrs
);
3468 if (sess
->back_channel
.nr_rdma_attrs
) {
3470 WRITE32(sess
->back_channel
.rdma_attrs
);
3477 nfsd4_encode_destroy_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3478 struct nfsd4_destroy_session
*destroy_session
)
3484 nfsd4_encode_free_stateid(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3485 struct nfsd4_free_stateid
*free_stateid
)
3499 nfsd4_encode_sequence(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3500 struct nfsd4_sequence
*seq
)
3507 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN
+ 20);
3508 WRITEMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
3509 WRITE32(seq
->seqid
);
3510 WRITE32(seq
->slotid
);
3511 /* Note slotid's are numbered from zero: */
3512 WRITE32(seq
->maxslots
- 1); /* sr_highest_slotid */
3513 WRITE32(seq
->maxslots
- 1); /* sr_target_highest_slotid */
3514 WRITE32(seq
->status_flags
);
3517 resp
->cstate
.datap
= p
; /* DRC cache data pointer */
3522 nfsd4_encode_test_stateid(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3523 struct nfsd4_test_stateid
*test_stateid
)
3525 struct nfsd4_test_stateid_id
*stateid
, *next
;
3528 RESERVE_SPACE(4 + (4 * test_stateid
->ts_num_ids
));
3529 *p
++ = htonl(test_stateid
->ts_num_ids
);
3531 list_for_each_entry_safe(stateid
, next
, &test_stateid
->ts_stateid_list
, ts_id_list
) {
3532 *p
++ = stateid
->ts_id_status
;
3540 nfsd4_encode_noop(struct nfsd4_compoundres
*resp
, __be32 nfserr
, void *p
)
3545 typedef __be32(* nfsd4_enc
)(struct nfsd4_compoundres
*, __be32
, void *);
3548 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3549 * since we don't need to filter out obsolete ops as this is
3550 * done in the decoding phase.
3552 static nfsd4_enc nfsd4_enc_ops
[] = {
3553 [OP_ACCESS
] = (nfsd4_enc
)nfsd4_encode_access
,
3554 [OP_CLOSE
] = (nfsd4_enc
)nfsd4_encode_close
,
3555 [OP_COMMIT
] = (nfsd4_enc
)nfsd4_encode_commit
,
3556 [OP_CREATE
] = (nfsd4_enc
)nfsd4_encode_create
,
3557 [OP_DELEGPURGE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3558 [OP_DELEGRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3559 [OP_GETATTR
] = (nfsd4_enc
)nfsd4_encode_getattr
,
3560 [OP_GETFH
] = (nfsd4_enc
)nfsd4_encode_getfh
,
3561 [OP_LINK
] = (nfsd4_enc
)nfsd4_encode_link
,
3562 [OP_LOCK
] = (nfsd4_enc
)nfsd4_encode_lock
,
3563 [OP_LOCKT
] = (nfsd4_enc
)nfsd4_encode_lockt
,
3564 [OP_LOCKU
] = (nfsd4_enc
)nfsd4_encode_locku
,
3565 [OP_LOOKUP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3566 [OP_LOOKUPP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3567 [OP_NVERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3568 [OP_OPEN
] = (nfsd4_enc
)nfsd4_encode_open
,
3569 [OP_OPENATTR
] = (nfsd4_enc
)nfsd4_encode_noop
,
3570 [OP_OPEN_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_open_confirm
,
3571 [OP_OPEN_DOWNGRADE
] = (nfsd4_enc
)nfsd4_encode_open_downgrade
,
3572 [OP_PUTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3573 [OP_PUTPUBFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3574 [OP_PUTROOTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3575 [OP_READ
] = (nfsd4_enc
)nfsd4_encode_read
,
3576 [OP_READDIR
] = (nfsd4_enc
)nfsd4_encode_readdir
,
3577 [OP_READLINK
] = (nfsd4_enc
)nfsd4_encode_readlink
,
3578 [OP_REMOVE
] = (nfsd4_enc
)nfsd4_encode_remove
,
3579 [OP_RENAME
] = (nfsd4_enc
)nfsd4_encode_rename
,
3580 [OP_RENEW
] = (nfsd4_enc
)nfsd4_encode_noop
,
3581 [OP_RESTOREFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3582 [OP_SAVEFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3583 [OP_SECINFO
] = (nfsd4_enc
)nfsd4_encode_secinfo
,
3584 [OP_SETATTR
] = (nfsd4_enc
)nfsd4_encode_setattr
,
3585 [OP_SETCLIENTID
] = (nfsd4_enc
)nfsd4_encode_setclientid
,
3586 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_noop
,
3587 [OP_VERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3588 [OP_WRITE
] = (nfsd4_enc
)nfsd4_encode_write
,
3589 [OP_RELEASE_LOCKOWNER
] = (nfsd4_enc
)nfsd4_encode_noop
,
3591 /* NFSv4.1 operations */
3592 [OP_BACKCHANNEL_CTL
] = (nfsd4_enc
)nfsd4_encode_noop
,
3593 [OP_BIND_CONN_TO_SESSION
] = (nfsd4_enc
)nfsd4_encode_bind_conn_to_session
,
3594 [OP_EXCHANGE_ID
] = (nfsd4_enc
)nfsd4_encode_exchange_id
,
3595 [OP_CREATE_SESSION
] = (nfsd4_enc
)nfsd4_encode_create_session
,
3596 [OP_DESTROY_SESSION
] = (nfsd4_enc
)nfsd4_encode_destroy_session
,
3597 [OP_FREE_STATEID
] = (nfsd4_enc
)nfsd4_encode_free_stateid
,
3598 [OP_GET_DIR_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3599 [OP_GETDEVICEINFO
] = (nfsd4_enc
)nfsd4_encode_noop
,
3600 [OP_GETDEVICELIST
] = (nfsd4_enc
)nfsd4_encode_noop
,
3601 [OP_LAYOUTCOMMIT
] = (nfsd4_enc
)nfsd4_encode_noop
,
3602 [OP_LAYOUTGET
] = (nfsd4_enc
)nfsd4_encode_noop
,
3603 [OP_LAYOUTRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3604 [OP_SECINFO_NO_NAME
] = (nfsd4_enc
)nfsd4_encode_secinfo_no_name
,
3605 [OP_SEQUENCE
] = (nfsd4_enc
)nfsd4_encode_sequence
,
3606 [OP_SET_SSV
] = (nfsd4_enc
)nfsd4_encode_noop
,
3607 [OP_TEST_STATEID
] = (nfsd4_enc
)nfsd4_encode_test_stateid
,
3608 [OP_WANT_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3609 [OP_DESTROY_CLIENTID
] = (nfsd4_enc
)nfsd4_encode_noop
,
3610 [OP_RECLAIM_COMPLETE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3614 * Calculate the total amount of memory that the compound response has taken
3615 * after encoding the current operation with pad.
3617 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3618 * which was specified at nfsd4_operation, else pad is zero.
3620 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3622 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3623 * will be at least a page and will therefore hold the xdr_buf head.
3625 __be32
nfsd4_check_resp_size(struct nfsd4_compoundres
*resp
, u32 pad
)
3627 struct xdr_buf
*xb
= &resp
->rqstp
->rq_res
;
3628 struct nfsd4_session
*session
= NULL
;
3629 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
3630 u32 length
, tlen
= 0;
3632 if (!nfsd4_has_session(&resp
->cstate
))
3635 session
= resp
->cstate
.session
;
3636 if (session
== NULL
)
3639 if (xb
->page_len
== 0) {
3640 length
= (char *)resp
->p
- (char *)xb
->head
[0].iov_base
+ pad
;
3642 if (xb
->tail
[0].iov_base
&& xb
->tail
[0].iov_len
> 0)
3643 tlen
= (char *)resp
->p
- (char *)xb
->tail
[0].iov_base
;
3645 length
= xb
->head
[0].iov_len
+ xb
->page_len
+ tlen
+ pad
;
3647 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__
,
3648 length
, xb
->page_len
, tlen
, pad
);
3650 if (length
> session
->se_fchannel
.maxresp_sz
)
3651 return nfserr_rep_too_big
;
3653 if ((slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
) &&
3654 length
> session
->se_fchannel
.maxresp_cached
)
3655 return nfserr_rep_too_big_to_cache
;
3661 nfsd4_encode_operation(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3663 struct nfs4_stateowner
*so
= resp
->cstate
.replay_owner
;
3669 statp
= p
++; /* to be backfilled at the end */
3672 if (op
->opnum
== OP_ILLEGAL
)
3674 BUG_ON(op
->opnum
< 0 || op
->opnum
>= ARRAY_SIZE(nfsd4_enc_ops
) ||
3675 !nfsd4_enc_ops
[op
->opnum
]);
3676 op
->status
= nfsd4_enc_ops
[op
->opnum
](resp
, op
->status
, &op
->u
);
3677 /* nfsd4_check_drc_limit guarantees enough room for error status */
3679 op
->status
= nfsd4_check_resp_size(resp
, 0);
3681 so
->so_replay
.rp_status
= op
->status
;
3682 so
->so_replay
.rp_buflen
= (char *)resp
->p
- (char *)(statp
+1);
3683 memcpy(so
->so_replay
.rp_buf
, statp
+1, so
->so_replay
.rp_buflen
);
3687 * Note: We write the status directly, instead of using WRITE32(),
3688 * since it is already in network byte order.
3690 *statp
= op
->status
;
3694 * Encode the reply stored in the stateowner reply cache
3696 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3697 * previously sent already encoded operation.
3699 * called with nfs4_lock_state() held
3702 nfsd4_encode_replay(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3705 struct nfs4_replay
*rp
= op
->replay
;
3711 *p
++ = rp
->rp_status
; /* already xdr'ed */
3714 RESERVE_SPACE(rp
->rp_buflen
);
3715 WRITEMEM(rp
->rp_buf
, rp
->rp_buflen
);
3720 nfs4svc_encode_voidres(struct svc_rqst
*rqstp
, __be32
*p
, void *dummy
)
3722 return xdr_ressize_check(rqstp
, p
);
3725 int nfsd4_release_compoundargs(void *rq
, __be32
*p
, void *resp
)
3727 struct svc_rqst
*rqstp
= rq
;
3728 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
3730 if (args
->ops
!= args
->iops
) {
3732 args
->ops
= args
->iops
;
3736 while (args
->to_free
) {
3737 struct tmpbuf
*tb
= args
->to_free
;
3738 args
->to_free
= tb
->next
;
3739 tb
->release(tb
->buf
);
3746 nfs4svc_decode_compoundargs(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundargs
*args
)
3749 args
->end
= rqstp
->rq_arg
.head
[0].iov_base
+ rqstp
->rq_arg
.head
[0].iov_len
;
3750 args
->pagelist
= rqstp
->rq_arg
.pages
;
3751 args
->pagelen
= rqstp
->rq_arg
.page_len
;
3753 args
->to_free
= NULL
;
3754 args
->ops
= args
->iops
;
3755 args
->rqstp
= rqstp
;
3757 return !nfsd4_decode_compound(args
);
3761 nfs4svc_encode_compoundres(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundres
*resp
)
3764 * All that remains is to write the tag and operation count...
3766 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
3769 *p
++ = htonl(resp
->taglen
);
3770 memcpy(p
, resp
->tag
, resp
->taglen
);
3771 p
+= XDR_QUADLEN(resp
->taglen
);
3772 *p
++ = htonl(resp
->opcnt
);
3774 if (rqstp
->rq_res
.page_len
)
3775 iov
= &rqstp
->rq_res
.tail
[0];
3777 iov
= &rqstp
->rq_res
.head
[0];
3778 iov
->iov_len
= ((char*)resp
->p
) - (char*)iov
->iov_base
;
3779 BUG_ON(iov
->iov_len
> PAGE_SIZE
);
3780 if (nfsd4_has_session(cs
)) {
3781 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3782 struct nfs4_client
*clp
= cs
->session
->se_client
;
3783 if (cs
->status
!= nfserr_replay_cache
) {
3784 nfsd4_store_cache_entry(resp
);
3785 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
3787 /* Renew the clientid on success and on replay */
3788 spin_lock(&nn
->client_lock
);
3789 nfsd4_put_session(cs
->session
);
3790 spin_unlock(&nn
->client_lock
);
3791 put_client_renew(clp
);