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 READMEM(x,nbytes) do { \
108 p += XDR_QUADLEN(nbytes); \
110 #define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
118 p += XDR_QUADLEN(nbytes); \
120 #define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
125 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126 #define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
137 static void next_decode_page(struct nfsd4_compoundargs
*argp
)
139 argp
->p
= page_address(argp
->pagelist
[0]);
141 if (argp
->pagelen
< PAGE_SIZE
) {
142 argp
->end
= argp
->p
+ (argp
->pagelen
>>2);
145 argp
->end
= argp
->p
+ (PAGE_SIZE
>>2);
146 argp
->pagelen
-= PAGE_SIZE
;
150 static __be32
*read_buf(struct nfsd4_compoundargs
*argp
, u32 nbytes
)
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
155 unsigned int avail
= (char *)argp
->end
- (char *)argp
->p
;
157 if (avail
+ argp
->pagelen
< nbytes
)
159 if (avail
+ PAGE_SIZE
< nbytes
) /* need more than a page !! */
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes
<= sizeof(argp
->tmp
))
166 p
= argp
->tmpp
= kmalloc(nbytes
, GFP_KERNEL
);
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
176 memcpy(p
, argp
->p
, avail
);
177 next_decode_page(argp
);
178 memcpy(((char*)p
)+avail
, argp
->p
, (nbytes
- avail
));
179 argp
->p
+= XDR_QUADLEN(nbytes
- avail
);
183 static int zero_clientid(clientid_t
*clid
)
185 return (clid
->cl_boot
== 0) && (clid
->cl_id
== 0);
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
198 defer_free(struct nfsd4_compoundargs
*argp
,
199 void (*release
)(const void *), void *p
)
203 tb
= kmalloc(sizeof(*tb
), GFP_KERNEL
);
207 tb
->release
= release
;
208 tb
->next
= argp
->to_free
;
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
223 static char *savemem(struct nfsd4_compoundargs
*argp
, __be32
*p
, int nbytes
)
225 if (p
== argp
->tmp
) {
226 p
= kmemdup(argp
->tmp
, nbytes
, GFP_KERNEL
);
230 BUG_ON(p
!= argp
->tmpp
);
233 if (defer_free(argp
, kfree
, p
)) {
241 nfsd4_decode_bitmap(struct nfsd4_compoundargs
*argp
, u32
*bmval
)
255 READ_BUF(bmlen
<< 2);
267 nfsd4_decode_fattr(struct nfsd4_compoundargs
*argp
, u32
*bmval
,
268 struct iattr
*iattr
, struct nfs4_acl
**acl
,
269 struct xdr_netobj
*label
)
271 int expected_len
, len
= 0;
277 if ((status
= nfsd4_decode_bitmap(argp
, bmval
)))
281 READ32(expected_len
);
283 if (bmval
[0] & FATTR4_WORD0_SIZE
) {
286 READ64(iattr
->ia_size
);
287 iattr
->ia_valid
|= ATTR_SIZE
;
289 if (bmval
[0] & FATTR4_WORD0_ACL
) {
291 struct nfs4_ace
*ace
;
293 READ_BUF(4); len
+= 4;
296 if (nace
> NFS4_ACL_MAX
)
299 *acl
= nfs4_acl_new(nace
);
301 return nfserr_jukebox
;
303 defer_free(argp
, kfree
, *acl
);
305 (*acl
)->naces
= nace
;
306 for (ace
= (*acl
)->aces
; ace
< (*acl
)->aces
+ nace
; ace
++) {
307 READ_BUF(16); len
+= 16;
310 READ32(ace
->access_mask
);
313 len
+= XDR_QUADLEN(dummy32
) << 2;
314 READMEM(buf
, dummy32
);
315 ace
->whotype
= nfs4_acl_get_whotype(buf
, dummy32
);
317 if (ace
->whotype
!= NFS4_ACL_WHO_NAMED
)
319 else if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
320 status
= nfsd_map_name_to_gid(argp
->rqstp
,
321 buf
, dummy32
, &ace
->who_gid
);
323 status
= nfsd_map_name_to_uid(argp
->rqstp
,
324 buf
, dummy32
, &ace
->who_uid
);
330 if (bmval
[1] & FATTR4_WORD1_MODE
) {
333 READ32(iattr
->ia_mode
);
334 iattr
->ia_mode
&= (S_IFMT
| S_IALLUGO
);
335 iattr
->ia_valid
|= ATTR_MODE
;
337 if (bmval
[1] & FATTR4_WORD1_OWNER
) {
342 len
+= (XDR_QUADLEN(dummy32
) << 2);
343 READMEM(buf
, dummy32
);
344 if ((status
= nfsd_map_name_to_uid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_uid
)))
346 iattr
->ia_valid
|= ATTR_UID
;
348 if (bmval
[1] & FATTR4_WORD1_OWNER_GROUP
) {
353 len
+= (XDR_QUADLEN(dummy32
) << 2);
354 READMEM(buf
, dummy32
);
355 if ((status
= nfsd_map_name_to_gid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_gid
)))
357 iattr
->ia_valid
|= ATTR_GID
;
359 if (bmval
[1] & FATTR4_WORD1_TIME_ACCESS_SET
) {
364 case NFS4_SET_TO_CLIENT_TIME
:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
369 READ64(iattr
->ia_atime
.tv_sec
);
370 READ32(iattr
->ia_atime
.tv_nsec
);
371 if (iattr
->ia_atime
.tv_nsec
>= (u32
)1000000000)
373 iattr
->ia_valid
|= (ATTR_ATIME
| ATTR_ATIME_SET
);
375 case NFS4_SET_TO_SERVER_TIME
:
376 iattr
->ia_valid
|= ATTR_ATIME
;
382 if (bmval
[1] & FATTR4_WORD1_TIME_MODIFY_SET
) {
387 case NFS4_SET_TO_CLIENT_TIME
:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
392 READ64(iattr
->ia_mtime
.tv_sec
);
393 READ32(iattr
->ia_mtime
.tv_nsec
);
394 if (iattr
->ia_mtime
.tv_nsec
>= (u32
)1000000000)
396 iattr
->ia_valid
|= (ATTR_MTIME
| ATTR_MTIME_SET
);
398 case NFS4_SET_TO_SERVER_TIME
:
399 iattr
->ia_valid
|= ATTR_MTIME
;
407 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) {
411 READ32(dummy32
); /* lfs: we don't use it */
414 READ32(dummy32
); /* pi: we don't use it either */
419 if (dummy32
> NFSD4_MAX_SEC_LABEL_LEN
)
420 return nfserr_badlabel
;
421 len
+= (XDR_QUADLEN(dummy32
) << 2);
422 READMEM(buf
, dummy32
);
423 label
->data
= kzalloc(dummy32
+ 1, GFP_KERNEL
);
425 return nfserr_jukebox
;
426 label
->len
= dummy32
;
427 defer_free(argp
, kfree
, label
->data
);
428 memcpy(label
->data
, buf
, dummy32
);
432 if (bmval
[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval
[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval
[2] & ~NFSD_WRITEABLE_ATTRS_WORD2
)
435 READ_BUF(expected_len
- len
);
436 else if (len
!= expected_len
)
443 nfsd4_decode_stateid(struct nfsd4_compoundargs
*argp
, stateid_t
*sid
)
447 READ_BUF(sizeof(stateid_t
));
448 READ32(sid
->si_generation
);
449 COPYMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
455 nfsd4_decode_access(struct nfsd4_compoundargs
*argp
, struct nfsd4_access
*access
)
460 READ32(access
->ac_req_access
);
465 static __be32
nfsd4_decode_cb_sec(struct nfsd4_compoundargs
*argp
, struct nfsd4_cb_sec
*cbs
)
473 /* callback_sec_params4 */
477 cbs
->flavor
= (u32
)(-1);
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
481 for (i
= 0; i
< nr_secflavs
; ++i
) {
486 /* Nothing to read */
487 if (cbs
->flavor
== (u32
)(-1))
488 cbs
->flavor
= RPC_AUTH_NULL
;
498 SAVEMEM(machine_name
, dummy
);
509 if (cbs
->flavor
== (u32
)(-1)) {
510 kuid_t kuid
= make_kuid(&init_user_ns
, uid
);
511 kgid_t kgid
= make_kgid(&init_user_ns
, gid
);
512 if (uid_valid(kuid
) && gid_valid(kgid
)) {
515 cbs
->flavor
= RPC_AUTH_UNIX
;
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
523 dprintk("RPC_AUTH_GSS callback secflavor "
528 /* gcbp_handle_from_server */
531 p
+= XDR_QUADLEN(dummy
);
532 /* gcbp_handle_from_client */
538 dprintk("Illegal callback secflavor\n");
545 static __be32
nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs
*argp
, struct nfsd4_backchannel_ctl
*bc
)
550 READ32(bc
->bc_cb_program
);
551 nfsd4_decode_cb_sec(argp
, &bc
->bc_cb_sec
);
556 static __be32
nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs
*argp
, struct nfsd4_bind_conn_to_session
*bcts
)
560 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 8);
561 COPYMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
569 nfsd4_decode_close(struct nfsd4_compoundargs
*argp
, struct nfsd4_close
*close
)
574 READ32(close
->cl_seqid
);
575 return nfsd4_decode_stateid(argp
, &close
->cl_stateid
);
582 nfsd4_decode_commit(struct nfsd4_compoundargs
*argp
, struct nfsd4_commit
*commit
)
587 READ64(commit
->co_offset
);
588 READ32(commit
->co_count
);
594 nfsd4_decode_create(struct nfsd4_compoundargs
*argp
, struct nfsd4_create
*create
)
599 READ32(create
->cr_type
);
600 switch (create
->cr_type
) {
603 READ32(create
->cr_linklen
);
604 READ_BUF(create
->cr_linklen
);
605 SAVEMEM(create
->cr_linkname
, create
->cr_linklen
);
610 READ32(create
->cr_specdata1
);
611 READ32(create
->cr_specdata2
);
621 READ32(create
->cr_namelen
);
622 READ_BUF(create
->cr_namelen
);
623 SAVEMEM(create
->cr_name
, create
->cr_namelen
);
624 if ((status
= check_filename(create
->cr_name
, create
->cr_namelen
)))
627 status
= nfsd4_decode_fattr(argp
, create
->cr_bmval
, &create
->cr_iattr
,
628 &create
->cr_acl
, &create
->cr_label
);
636 nfsd4_decode_delegreturn(struct nfsd4_compoundargs
*argp
, struct nfsd4_delegreturn
*dr
)
638 return nfsd4_decode_stateid(argp
, &dr
->dr_stateid
);
642 nfsd4_decode_getattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_getattr
*getattr
)
644 return nfsd4_decode_bitmap(argp
, getattr
->ga_bmval
);
648 nfsd4_decode_link(struct nfsd4_compoundargs
*argp
, struct nfsd4_link
*link
)
653 READ32(link
->li_namelen
);
654 READ_BUF(link
->li_namelen
);
655 SAVEMEM(link
->li_name
, link
->li_namelen
);
656 if ((status
= check_filename(link
->li_name
, link
->li_namelen
)))
663 nfsd4_decode_lock(struct nfsd4_compoundargs
*argp
, struct nfsd4_lock
*lock
)
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
671 READ32(lock
->lk_type
);
672 if ((lock
->lk_type
< NFS4_READ_LT
) || (lock
->lk_type
> NFS4_WRITEW_LT
))
674 READ32(lock
->lk_reclaim
);
675 READ64(lock
->lk_offset
);
676 READ64(lock
->lk_length
);
677 READ32(lock
->lk_is_new
);
679 if (lock
->lk_is_new
) {
681 READ32(lock
->lk_new_open_seqid
);
682 status
= nfsd4_decode_stateid(argp
, &lock
->lk_new_open_stateid
);
685 READ_BUF(8 + sizeof(clientid_t
));
686 READ32(lock
->lk_new_lock_seqid
);
687 COPYMEM(&lock
->lk_new_clientid
, sizeof(clientid_t
));
688 READ32(lock
->lk_new_owner
.len
);
689 READ_BUF(lock
->lk_new_owner
.len
);
690 READMEM(lock
->lk_new_owner
.data
, lock
->lk_new_owner
.len
);
692 status
= nfsd4_decode_stateid(argp
, &lock
->lk_old_lock_stateid
);
696 READ32(lock
->lk_old_lock_seqid
);
703 nfsd4_decode_lockt(struct nfsd4_compoundargs
*argp
, struct nfsd4_lockt
*lockt
)
708 READ32(lockt
->lt_type
);
709 if((lockt
->lt_type
< NFS4_READ_LT
) || (lockt
->lt_type
> NFS4_WRITEW_LT
))
711 READ64(lockt
->lt_offset
);
712 READ64(lockt
->lt_length
);
713 COPYMEM(&lockt
->lt_clientid
, 8);
714 READ32(lockt
->lt_owner
.len
);
715 READ_BUF(lockt
->lt_owner
.len
);
716 READMEM(lockt
->lt_owner
.data
, lockt
->lt_owner
.len
);
722 nfsd4_decode_locku(struct nfsd4_compoundargs
*argp
, struct nfsd4_locku
*locku
)
727 READ32(locku
->lu_type
);
728 if ((locku
->lu_type
< NFS4_READ_LT
) || (locku
->lu_type
> NFS4_WRITEW_LT
))
730 READ32(locku
->lu_seqid
);
731 status
= nfsd4_decode_stateid(argp
, &locku
->lu_stateid
);
735 READ64(locku
->lu_offset
);
736 READ64(locku
->lu_length
);
742 nfsd4_decode_lookup(struct nfsd4_compoundargs
*argp
, struct nfsd4_lookup
*lookup
)
747 READ32(lookup
->lo_len
);
748 READ_BUF(lookup
->lo_len
);
749 SAVEMEM(lookup
->lo_name
, lookup
->lo_len
);
750 if ((status
= check_filename(lookup
->lo_name
, lookup
->lo_len
)))
756 static __be32
nfsd4_decode_share_access(struct nfsd4_compoundargs
*argp
, u32
*share_access
, u32
*deleg_want
, u32
*deleg_when
)
763 *share_access
= w
& NFS4_SHARE_ACCESS_MASK
;
764 *deleg_want
= w
& NFS4_SHARE_WANT_MASK
;
766 *deleg_when
= w
& NFS4_SHARE_WHEN_MASK
;
768 switch (w
& NFS4_SHARE_ACCESS_MASK
) {
769 case NFS4_SHARE_ACCESS_READ
:
770 case NFS4_SHARE_ACCESS_WRITE
:
771 case NFS4_SHARE_ACCESS_BOTH
:
774 return nfserr_bad_xdr
;
776 w
&= ~NFS4_SHARE_ACCESS_MASK
;
779 if (!argp
->minorversion
)
780 return nfserr_bad_xdr
;
781 switch (w
& NFS4_SHARE_WANT_MASK
) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE
:
783 case NFS4_SHARE_WANT_READ_DELEG
:
784 case NFS4_SHARE_WANT_WRITE_DELEG
:
785 case NFS4_SHARE_WANT_ANY_DELEG
:
786 case NFS4_SHARE_WANT_NO_DELEG
:
787 case NFS4_SHARE_WANT_CANCEL
:
790 return nfserr_bad_xdr
;
792 w
&= ~NFS4_SHARE_WANT_MASK
;
796 if (!deleg_when
) /* open_downgrade */
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL
:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
:
801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL
|
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
):
806 return nfserr_bad_xdr
;
809 static __be32
nfsd4_decode_share_deny(struct nfsd4_compoundargs
*argp
, u32
*x
)
815 /* Note: unlinke access bits, deny bits may be zero. */
816 if (*x
& ~NFS4_SHARE_DENY_BOTH
)
817 return nfserr_bad_xdr
;
820 return nfserr_bad_xdr
;
823 static __be32
nfsd4_decode_opaque(struct nfsd4_compoundargs
*argp
, struct xdr_netobj
*o
)
830 if (o
->len
== 0 || o
->len
> NFS4_OPAQUE_LIMIT
)
831 return nfserr_bad_xdr
;
834 SAVEMEM(o
->data
, o
->len
);
837 return nfserr_bad_xdr
;
841 nfsd4_decode_open(struct nfsd4_compoundargs
*argp
, struct nfsd4_open
*open
)
846 memset(open
->op_bmval
, 0, sizeof(open
->op_bmval
));
847 open
->op_iattr
.ia_valid
= 0;
848 open
->op_openowner
= NULL
;
850 open
->op_xdr_error
= 0;
851 /* seqid, share_access, share_deny, clientid, ownerlen */
853 READ32(open
->op_seqid
);
854 /* decode, yet ignore deleg_when until supported */
855 status
= nfsd4_decode_share_access(argp
, &open
->op_share_access
,
856 &open
->op_deleg_want
, &dummy
);
859 status
= nfsd4_decode_share_deny(argp
, &open
->op_share_deny
);
862 READ_BUF(sizeof(clientid_t
));
863 COPYMEM(&open
->op_clientid
, sizeof(clientid_t
));
864 status
= nfsd4_decode_opaque(argp
, &open
->op_owner
);
868 READ32(open
->op_create
);
869 switch (open
->op_create
) {
870 case NFS4_OPEN_NOCREATE
:
872 case NFS4_OPEN_CREATE
:
874 READ32(open
->op_createmode
);
875 switch (open
->op_createmode
) {
876 case NFS4_CREATE_UNCHECKED
:
877 case NFS4_CREATE_GUARDED
:
878 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
879 &open
->op_iattr
, &open
->op_acl
, &open
->op_label
);
883 case NFS4_CREATE_EXCLUSIVE
:
884 READ_BUF(NFS4_VERIFIER_SIZE
);
885 COPYMEM(open
->op_verf
.data
, NFS4_VERIFIER_SIZE
);
887 case NFS4_CREATE_EXCLUSIVE4_1
:
888 if (argp
->minorversion
< 1)
890 READ_BUF(NFS4_VERIFIER_SIZE
);
891 COPYMEM(open
->op_verf
.data
, NFS4_VERIFIER_SIZE
);
892 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
893 &open
->op_iattr
, &open
->op_acl
, &open
->op_label
);
907 READ32(open
->op_claim_type
);
908 switch (open
->op_claim_type
) {
909 case NFS4_OPEN_CLAIM_NULL
:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
912 READ32(open
->op_fname
.len
);
913 READ_BUF(open
->op_fname
.len
);
914 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
915 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
)))
918 case NFS4_OPEN_CLAIM_PREVIOUS
:
920 READ32(open
->op_delegate_type
);
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
923 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
927 READ32(open
->op_fname
.len
);
928 READ_BUF(open
->op_fname
.len
);
929 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
930 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
)))
933 case NFS4_OPEN_CLAIM_FH
:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
935 if (argp
->minorversion
< 1)
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
940 if (argp
->minorversion
< 1)
942 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
954 nfsd4_decode_open_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_confirm
*open_conf
)
958 if (argp
->minorversion
>= 1)
959 return nfserr_notsupp
;
961 status
= nfsd4_decode_stateid(argp
, &open_conf
->oc_req_stateid
);
965 READ32(open_conf
->oc_seqid
);
971 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_downgrade
*open_down
)
975 status
= nfsd4_decode_stateid(argp
, &open_down
->od_stateid
);
979 READ32(open_down
->od_seqid
);
980 status
= nfsd4_decode_share_access(argp
, &open_down
->od_share_access
,
981 &open_down
->od_deleg_want
, NULL
);
984 status
= nfsd4_decode_share_deny(argp
, &open_down
->od_share_deny
);
991 nfsd4_decode_putfh(struct nfsd4_compoundargs
*argp
, struct nfsd4_putfh
*putfh
)
996 READ32(putfh
->pf_fhlen
);
997 if (putfh
->pf_fhlen
> NFS4_FHSIZE
)
999 READ_BUF(putfh
->pf_fhlen
);
1000 SAVEMEM(putfh
->pf_fhval
, putfh
->pf_fhlen
);
1006 nfsd4_decode_putpubfh(struct nfsd4_compoundargs
*argp
, void *p
)
1008 if (argp
->minorversion
== 0)
1010 return nfserr_notsupp
;
1014 nfsd4_decode_read(struct nfsd4_compoundargs
*argp
, struct nfsd4_read
*read
)
1018 status
= nfsd4_decode_stateid(argp
, &read
->rd_stateid
);
1022 READ64(read
->rd_offset
);
1023 READ32(read
->rd_length
);
1029 nfsd4_decode_readdir(struct nfsd4_compoundargs
*argp
, struct nfsd4_readdir
*readdir
)
1034 READ64(readdir
->rd_cookie
);
1035 COPYMEM(readdir
->rd_verf
.data
, sizeof(readdir
->rd_verf
.data
));
1036 READ32(readdir
->rd_dircount
); /* just in case you needed a useless field... */
1037 READ32(readdir
->rd_maxcount
);
1038 if ((status
= nfsd4_decode_bitmap(argp
, readdir
->rd_bmval
)))
1045 nfsd4_decode_remove(struct nfsd4_compoundargs
*argp
, struct nfsd4_remove
*remove
)
1050 READ32(remove
->rm_namelen
);
1051 READ_BUF(remove
->rm_namelen
);
1052 SAVEMEM(remove
->rm_name
, remove
->rm_namelen
);
1053 if ((status
= check_filename(remove
->rm_name
, remove
->rm_namelen
)))
1060 nfsd4_decode_rename(struct nfsd4_compoundargs
*argp
, struct nfsd4_rename
*rename
)
1065 READ32(rename
->rn_snamelen
);
1066 READ_BUF(rename
->rn_snamelen
+ 4);
1067 SAVEMEM(rename
->rn_sname
, rename
->rn_snamelen
);
1068 READ32(rename
->rn_tnamelen
);
1069 READ_BUF(rename
->rn_tnamelen
);
1070 SAVEMEM(rename
->rn_tname
, rename
->rn_tnamelen
);
1071 if ((status
= check_filename(rename
->rn_sname
, rename
->rn_snamelen
)))
1073 if ((status
= check_filename(rename
->rn_tname
, rename
->rn_tnamelen
)))
1080 nfsd4_decode_renew(struct nfsd4_compoundargs
*argp
, clientid_t
*clientid
)
1084 if (argp
->minorversion
>= 1)
1085 return nfserr_notsupp
;
1087 READ_BUF(sizeof(clientid_t
));
1088 COPYMEM(clientid
, sizeof(clientid_t
));
1094 nfsd4_decode_secinfo(struct nfsd4_compoundargs
*argp
,
1095 struct nfsd4_secinfo
*secinfo
)
1100 READ32(secinfo
->si_namelen
);
1101 READ_BUF(secinfo
->si_namelen
);
1102 SAVEMEM(secinfo
->si_name
, secinfo
->si_namelen
);
1103 status
= check_filename(secinfo
->si_name
, secinfo
->si_namelen
);
1110 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs
*argp
,
1111 struct nfsd4_secinfo_no_name
*sin
)
1116 READ32(sin
->sin_style
);
1121 nfsd4_decode_setattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_setattr
*setattr
)
1125 status
= nfsd4_decode_stateid(argp
, &setattr
->sa_stateid
);
1128 return nfsd4_decode_fattr(argp
, setattr
->sa_bmval
, &setattr
->sa_iattr
,
1129 &setattr
->sa_acl
, &setattr
->sa_label
);
1133 nfsd4_decode_setclientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid
*setclientid
)
1137 if (argp
->minorversion
>= 1)
1138 return nfserr_notsupp
;
1140 READ_BUF(NFS4_VERIFIER_SIZE
);
1141 COPYMEM(setclientid
->se_verf
.data
, NFS4_VERIFIER_SIZE
);
1143 status
= nfsd4_decode_opaque(argp
, &setclientid
->se_name
);
1145 return nfserr_bad_xdr
;
1147 READ32(setclientid
->se_callback_prog
);
1148 READ32(setclientid
->se_callback_netid_len
);
1150 READ_BUF(setclientid
->se_callback_netid_len
+ 4);
1151 SAVEMEM(setclientid
->se_callback_netid_val
, setclientid
->se_callback_netid_len
);
1152 READ32(setclientid
->se_callback_addr_len
);
1154 READ_BUF(setclientid
->se_callback_addr_len
+ 4);
1155 SAVEMEM(setclientid
->se_callback_addr_val
, setclientid
->se_callback_addr_len
);
1156 READ32(setclientid
->se_callback_ident
);
1162 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid_confirm
*scd_c
)
1166 if (argp
->minorversion
>= 1)
1167 return nfserr_notsupp
;
1169 READ_BUF(8 + NFS4_VERIFIER_SIZE
);
1170 COPYMEM(&scd_c
->sc_clientid
, 8);
1171 COPYMEM(&scd_c
->sc_confirm
, NFS4_VERIFIER_SIZE
);
1176 /* Also used for NVERIFY */
1178 nfsd4_decode_verify(struct nfsd4_compoundargs
*argp
, struct nfsd4_verify
*verify
)
1182 if ((status
= nfsd4_decode_bitmap(argp
, verify
->ve_bmval
)))
1185 /* For convenience's sake, we compare raw xdr'd attributes in
1186 * nfsd4_proc_verify */
1189 READ32(verify
->ve_attrlen
);
1190 READ_BUF(verify
->ve_attrlen
);
1191 SAVEMEM(verify
->ve_attrval
, verify
->ve_attrlen
);
1197 nfsd4_decode_write(struct nfsd4_compoundargs
*argp
, struct nfsd4_write
*write
)
1203 status
= nfsd4_decode_stateid(argp
, &write
->wr_stateid
);
1207 READ64(write
->wr_offset
);
1208 READ32(write
->wr_stable_how
);
1209 if (write
->wr_stable_how
> 2)
1211 READ32(write
->wr_buflen
);
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1217 avail
= (char*)argp
->end
- (char*)argp
->p
;
1218 if (avail
+ argp
->pagelen
< write
->wr_buflen
) {
1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__
, __LINE__
);
1223 write
->wr_head
.iov_base
= p
;
1224 write
->wr_head
.iov_len
= avail
;
1225 write
->wr_pagelist
= argp
->pagelist
;
1227 len
= XDR_QUADLEN(write
->wr_buflen
) << 2;
1233 pages
= len
>> PAGE_SHIFT
;
1234 argp
->pagelist
+= pages
;
1235 argp
->pagelen
-= pages
* PAGE_SIZE
;
1236 len
-= pages
* PAGE_SIZE
;
1238 argp
->p
= (__be32
*)page_address(argp
->pagelist
[0]);
1240 argp
->end
= argp
->p
+ XDR_QUADLEN(PAGE_SIZE
);
1242 argp
->p
+= XDR_QUADLEN(len
);
1248 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs
*argp
, struct nfsd4_release_lockowner
*rlockowner
)
1252 if (argp
->minorversion
>= 1)
1253 return nfserr_notsupp
;
1256 COPYMEM(&rlockowner
->rl_clientid
, sizeof(clientid_t
));
1257 READ32(rlockowner
->rl_owner
.len
);
1258 READ_BUF(rlockowner
->rl_owner
.len
);
1259 READMEM(rlockowner
->rl_owner
.data
, rlockowner
->rl_owner
.len
);
1261 if (argp
->minorversion
&& !zero_clientid(&rlockowner
->rl_clientid
))
1262 return nfserr_inval
;
1267 nfsd4_decode_exchange_id(struct nfsd4_compoundargs
*argp
,
1268 struct nfsd4_exchange_id
*exid
)
1273 READ_BUF(NFS4_VERIFIER_SIZE
);
1274 COPYMEM(exid
->verifier
.data
, NFS4_VERIFIER_SIZE
);
1276 status
= nfsd4_decode_opaque(argp
, &exid
->clname
);
1278 return nfserr_bad_xdr
;
1281 READ32(exid
->flags
);
1283 /* Ignore state_protect4_a */
1285 READ32(exid
->spa_how
);
1286 switch (exid
->spa_how
) {
1290 /* spo_must_enforce */
1293 READ_BUF(dummy
* 4);
1296 /* spo_must_allow */
1299 READ_BUF(dummy
* 4);
1306 READ_BUF(dummy
* 4);
1311 READ_BUF(dummy
* 4);
1314 /* ssp_hash_algs<> */
1321 p
+= XDR_QUADLEN(dummy
);
1324 /* ssp_encr_algs<> */
1331 p
+= XDR_QUADLEN(dummy
);
1334 /* ssp_window and ssp_num_gss_handles */
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1355 p
+= XDR_QUADLEN(dummy
);
1361 p
+= XDR_QUADLEN(dummy
);
1371 nfsd4_decode_create_session(struct nfsd4_compoundargs
*argp
,
1372 struct nfsd4_create_session
*sess
)
1378 COPYMEM(&sess
->clientid
, 8);
1379 READ32(sess
->seqid
);
1380 READ32(sess
->flags
);
1382 /* Fore channel attrs */
1384 READ32(dummy
); /* headerpadsz is always 0 */
1385 READ32(sess
->fore_channel
.maxreq_sz
);
1386 READ32(sess
->fore_channel
.maxresp_sz
);
1387 READ32(sess
->fore_channel
.maxresp_cached
);
1388 READ32(sess
->fore_channel
.maxops
);
1389 READ32(sess
->fore_channel
.maxreqs
);
1390 READ32(sess
->fore_channel
.nr_rdma_attrs
);
1391 if (sess
->fore_channel
.nr_rdma_attrs
== 1) {
1393 READ32(sess
->fore_channel
.rdma_attrs
);
1394 } else if (sess
->fore_channel
.nr_rdma_attrs
> 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1399 /* Back channel attrs */
1401 READ32(dummy
); /* headerpadsz is always 0 */
1402 READ32(sess
->back_channel
.maxreq_sz
);
1403 READ32(sess
->back_channel
.maxresp_sz
);
1404 READ32(sess
->back_channel
.maxresp_cached
);
1405 READ32(sess
->back_channel
.maxops
);
1406 READ32(sess
->back_channel
.maxreqs
);
1407 READ32(sess
->back_channel
.nr_rdma_attrs
);
1408 if (sess
->back_channel
.nr_rdma_attrs
== 1) {
1410 READ32(sess
->back_channel
.rdma_attrs
);
1411 } else if (sess
->back_channel
.nr_rdma_attrs
> 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1417 READ32(sess
->callback_prog
);
1418 nfsd4_decode_cb_sec(argp
, &sess
->cb_sec
);
1423 nfsd4_decode_destroy_session(struct nfsd4_compoundargs
*argp
,
1424 struct nfsd4_destroy_session
*destroy_session
)
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN
);
1428 COPYMEM(destroy_session
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1434 nfsd4_decode_free_stateid(struct nfsd4_compoundargs
*argp
,
1435 struct nfsd4_free_stateid
*free_stateid
)
1439 READ_BUF(sizeof(stateid_t
));
1440 READ32(free_stateid
->fr_stateid
.si_generation
);
1441 COPYMEM(&free_stateid
->fr_stateid
.si_opaque
, sizeof(stateid_opaque_t
));
1447 nfsd4_decode_sequence(struct nfsd4_compoundargs
*argp
,
1448 struct nfsd4_sequence
*seq
)
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 16);
1453 COPYMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1455 READ32(seq
->slotid
);
1456 READ32(seq
->maxslots
);
1457 READ32(seq
->cachethis
);
1463 nfsd4_decode_test_stateid(struct nfsd4_compoundargs
*argp
, struct nfsd4_test_stateid
*test_stateid
)
1467 struct nfsd4_test_stateid_id
*stateid
;
1470 test_stateid
->ts_num_ids
= ntohl(*p
++);
1472 INIT_LIST_HEAD(&test_stateid
->ts_stateid_list
);
1474 for (i
= 0; i
< test_stateid
->ts_num_ids
; i
++) {
1475 stateid
= kmalloc(sizeof(struct nfsd4_test_stateid_id
), GFP_KERNEL
);
1477 status
= nfserrno(-ENOMEM
);
1481 defer_free(argp
, kfree
, stateid
);
1482 INIT_LIST_HEAD(&stateid
->ts_id_list
);
1483 list_add_tail(&stateid
->ts_id_list
, &test_stateid
->ts_stateid_list
);
1485 status
= nfsd4_decode_stateid(argp
, &stateid
->ts_id_stateid
);
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__
, __LINE__
);
1495 status
= nfserr_bad_xdr
;
1499 static __be32
nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_destroy_clientid
*dc
)
1504 COPYMEM(&dc
->clientid
, 8);
1509 static __be32
nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs
*argp
, struct nfsd4_reclaim_complete
*rc
)
1514 READ32(rc
->rca_one_fs
);
1520 nfsd4_decode_noop(struct nfsd4_compoundargs
*argp
, void *p
)
1526 nfsd4_decode_notsupp(struct nfsd4_compoundargs
*argp
, void *p
)
1528 return nfserr_notsupp
;
1531 typedef __be32(*nfsd4_dec
)(struct nfsd4_compoundargs
*argp
, void *);
1533 static nfsd4_dec nfsd4_dec_ops
[] = {
1534 [OP_ACCESS
] = (nfsd4_dec
)nfsd4_decode_access
,
1535 [OP_CLOSE
] = (nfsd4_dec
)nfsd4_decode_close
,
1536 [OP_COMMIT
] = (nfsd4_dec
)nfsd4_decode_commit
,
1537 [OP_CREATE
] = (nfsd4_dec
)nfsd4_decode_create
,
1538 [OP_DELEGPURGE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1539 [OP_DELEGRETURN
] = (nfsd4_dec
)nfsd4_decode_delegreturn
,
1540 [OP_GETATTR
] = (nfsd4_dec
)nfsd4_decode_getattr
,
1541 [OP_GETFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1542 [OP_LINK
] = (nfsd4_dec
)nfsd4_decode_link
,
1543 [OP_LOCK
] = (nfsd4_dec
)nfsd4_decode_lock
,
1544 [OP_LOCKT
] = (nfsd4_dec
)nfsd4_decode_lockt
,
1545 [OP_LOCKU
] = (nfsd4_dec
)nfsd4_decode_locku
,
1546 [OP_LOOKUP
] = (nfsd4_dec
)nfsd4_decode_lookup
,
1547 [OP_LOOKUPP
] = (nfsd4_dec
)nfsd4_decode_noop
,
1548 [OP_NVERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1549 [OP_OPEN
] = (nfsd4_dec
)nfsd4_decode_open
,
1550 [OP_OPENATTR
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1551 [OP_OPEN_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_open_confirm
,
1552 [OP_OPEN_DOWNGRADE
] = (nfsd4_dec
)nfsd4_decode_open_downgrade
,
1553 [OP_PUTFH
] = (nfsd4_dec
)nfsd4_decode_putfh
,
1554 [OP_PUTPUBFH
] = (nfsd4_dec
)nfsd4_decode_putpubfh
,
1555 [OP_PUTROOTFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1556 [OP_READ
] = (nfsd4_dec
)nfsd4_decode_read
,
1557 [OP_READDIR
] = (nfsd4_dec
)nfsd4_decode_readdir
,
1558 [OP_READLINK
] = (nfsd4_dec
)nfsd4_decode_noop
,
1559 [OP_REMOVE
] = (nfsd4_dec
)nfsd4_decode_remove
,
1560 [OP_RENAME
] = (nfsd4_dec
)nfsd4_decode_rename
,
1561 [OP_RENEW
] = (nfsd4_dec
)nfsd4_decode_renew
,
1562 [OP_RESTOREFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1563 [OP_SAVEFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1564 [OP_SECINFO
] = (nfsd4_dec
)nfsd4_decode_secinfo
,
1565 [OP_SETATTR
] = (nfsd4_dec
)nfsd4_decode_setattr
,
1566 [OP_SETCLIENTID
] = (nfsd4_dec
)nfsd4_decode_setclientid
,
1567 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_setclientid_confirm
,
1568 [OP_VERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1569 [OP_WRITE
] = (nfsd4_dec
)nfsd4_decode_write
,
1570 [OP_RELEASE_LOCKOWNER
] = (nfsd4_dec
)nfsd4_decode_release_lockowner
,
1572 /* new operations for NFSv4.1 */
1573 [OP_BACKCHANNEL_CTL
] = (nfsd4_dec
)nfsd4_decode_backchannel_ctl
,
1574 [OP_BIND_CONN_TO_SESSION
]= (nfsd4_dec
)nfsd4_decode_bind_conn_to_session
,
1575 [OP_EXCHANGE_ID
] = (nfsd4_dec
)nfsd4_decode_exchange_id
,
1576 [OP_CREATE_SESSION
] = (nfsd4_dec
)nfsd4_decode_create_session
,
1577 [OP_DESTROY_SESSION
] = (nfsd4_dec
)nfsd4_decode_destroy_session
,
1578 [OP_FREE_STATEID
] = (nfsd4_dec
)nfsd4_decode_free_stateid
,
1579 [OP_GET_DIR_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1580 [OP_GETDEVICEINFO
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1581 [OP_GETDEVICELIST
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1582 [OP_LAYOUTCOMMIT
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1583 [OP_LAYOUTGET
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1584 [OP_LAYOUTRETURN
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1585 [OP_SECINFO_NO_NAME
] = (nfsd4_dec
)nfsd4_decode_secinfo_no_name
,
1586 [OP_SEQUENCE
] = (nfsd4_dec
)nfsd4_decode_sequence
,
1587 [OP_SET_SSV
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1588 [OP_TEST_STATEID
] = (nfsd4_dec
)nfsd4_decode_test_stateid
,
1589 [OP_WANT_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1590 [OP_DESTROY_CLIENTID
] = (nfsd4_dec
)nfsd4_decode_destroy_clientid
,
1591 [OP_RECLAIM_COMPLETE
] = (nfsd4_dec
)nfsd4_decode_reclaim_complete
,
1595 nfsd4_opnum_in_range(struct nfsd4_compoundargs
*argp
, struct nfsd4_op
*op
)
1597 if (op
->opnum
< FIRST_NFS4_OP
)
1599 else if (argp
->minorversion
== 0 && op
->opnum
> LAST_NFS40_OP
)
1601 else if (argp
->minorversion
== 1 && op
->opnum
> LAST_NFS41_OP
)
1603 else if (argp
->minorversion
== 2 && op
->opnum
> LAST_NFS42_OP
)
1609 * Return a rough estimate of the maximum possible reply size. Note the
1610 * estimate includes rpc headers so is meant to be passed to
1611 * svc_reserve, not svc_reserve_auth.
1613 * Also note the current compound encoding permits only one operation to
1614 * use pages beyond the first one, so the maximum possible length is the
1615 * maximum over these values, not the sum.
1617 static int nfsd4_max_reply(u32 opnum
)
1623 * Both of these ops take a single page for data and put
1624 * the head and tail in another page:
1626 return 2 * PAGE_SIZE
;
1635 nfsd4_decode_compound(struct nfsd4_compoundargs
*argp
)
1638 struct nfsd4_op
*op
;
1639 bool cachethis
= false;
1640 int max_reply
= PAGE_SIZE
;
1644 READ32(argp
->taglen
);
1645 READ_BUF(argp
->taglen
+ 8);
1646 SAVEMEM(argp
->tag
, argp
->taglen
);
1647 READ32(argp
->minorversion
);
1648 READ32(argp
->opcnt
);
1650 if (argp
->taglen
> NFSD4_MAX_TAGLEN
)
1652 if (argp
->opcnt
> 100)
1655 if (argp
->opcnt
> ARRAY_SIZE(argp
->iops
)) {
1656 argp
->ops
= kmalloc(argp
->opcnt
* sizeof(*argp
->ops
), GFP_KERNEL
);
1658 argp
->ops
= argp
->iops
;
1659 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1664 if (argp
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
1667 for (i
= 0; i
< argp
->opcnt
; i
++) {
1674 if (nfsd4_opnum_in_range(argp
, op
))
1675 op
->status
= nfsd4_dec_ops
[op
->opnum
](argp
, &op
->u
);
1677 op
->opnum
= OP_ILLEGAL
;
1678 op
->status
= nfserr_op_illegal
;
1686 * We'll try to cache the result in the DRC if any one
1687 * op in the compound wants to be cached:
1689 cachethis
|= nfsd4_cache_this_op(op
);
1691 max_reply
= max(max_reply
, nfsd4_max_reply(op
->opnum
));
1693 /* Sessions make the DRC unnecessary: */
1694 if (argp
->minorversion
)
1696 if (max_reply
!= INT_MAX
)
1697 svc_reserve(argp
->rqstp
, max_reply
);
1698 argp
->rqstp
->rq_cachetype
= cachethis
? RC_REPLBUFF
: RC_NOCACHE
;
1703 #define WRITE32(n) *p++ = htonl(n)
1704 #define WRITE64(n) do { \
1705 *p++ = htonl((u32)((n) >> 32)); \
1706 *p++ = htonl((u32)(n)); \
1708 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1709 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1710 memcpy(p, ptr, nbytes); \
1711 p += XDR_QUADLEN(nbytes); \
1714 static void write32(__be32
**p
, u32 n
)
1719 static void write64(__be32
**p
, u64 n
)
1721 write32(p
, (n
>> 32));
1725 static void write_change(__be32
**p
, struct kstat
*stat
, struct inode
*inode
)
1727 if (IS_I_VERSION(inode
)) {
1728 write64(p
, inode
->i_version
);
1730 write32(p
, stat
->ctime
.tv_sec
);
1731 write32(p
, stat
->ctime
.tv_nsec
);
1735 static void write_cinfo(__be32
**p
, struct nfsd4_change_info
*c
)
1737 write32(p
, c
->atomic
);
1738 if (c
->change_supported
) {
1739 write64(p
, c
->before_change
);
1740 write64(p
, c
->after_change
);
1742 write32(p
, c
->before_ctime_sec
);
1743 write32(p
, c
->before_ctime_nsec
);
1744 write32(p
, c
->after_ctime_sec
);
1745 write32(p
, c
->after_ctime_nsec
);
1749 #define RESERVE_SPACE(nbytes) do { \
1751 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1753 #define ADJUST_ARGS() resp->p = p
1755 /* Encode as an array of strings the string given with components
1756 * separated @sep, escaped with esc_enter and esc_exit.
1758 static __be32
nfsd4_encode_components_esc(char sep
, char *components
,
1759 __be32
**pp
, int *buflen
,
1760 char esc_enter
, char esc_exit
)
1764 int strlen
, count
=0;
1765 char *str
, *end
, *next
;
1767 dprintk("nfsd4_encode_components(%s)\n", components
);
1768 if ((*buflen
-= 4) < 0)
1769 return nfserr_resource
;
1770 WRITE32(0); /* We will fill this in with @count later */
1771 end
= str
= components
;
1773 bool found_esc
= false;
1775 /* try to parse as esc_start, ..., esc_end, sep */
1776 if (*str
== esc_enter
) {
1777 for (; *end
&& (*end
!= esc_exit
); end
++)
1778 /* find esc_exit or end of string */;
1780 if (*end
&& (!*next
|| *next
== sep
)) {
1787 for (; *end
&& (*end
!= sep
); end
++)
1788 /* find sep or end of string */;
1792 if ((*buflen
-= ((XDR_QUADLEN(strlen
) << 2) + 4)) < 0)
1793 return nfserr_resource
;
1795 WRITEMEM(str
, strlen
);
1808 /* Encode as an array of strings the string given with components
1811 static __be32
nfsd4_encode_components(char sep
, char *components
,
1812 __be32
**pp
, int *buflen
)
1814 return nfsd4_encode_components_esc(sep
, components
, pp
, buflen
, 0, 0);
1818 * encode a location element of a fs_locations structure
1820 static __be32
nfsd4_encode_fs_location4(struct nfsd4_fs_location
*location
,
1821 __be32
**pp
, int *buflen
)
1826 status
= nfsd4_encode_components_esc(':', location
->hosts
, &p
, buflen
,
1830 status
= nfsd4_encode_components('/', location
->path
, &p
, buflen
);
1838 * Encode a path in RFC3530 'pathname4' format
1840 static __be32
nfsd4_encode_path(const struct path
*root
,
1841 const struct path
*path
, __be32
**pp
, int *buflen
)
1843 struct path cur
= *path
;
1845 struct dentry
**components
= NULL
;
1846 unsigned int ncomponents
= 0;
1847 __be32 err
= nfserr_jukebox
;
1849 dprintk("nfsd4_encode_components(");
1852 /* First walk the path up to the nfsd root, and store the
1853 * dentries/path components in an array.
1856 if (cur
.dentry
== root
->dentry
&& cur
.mnt
== root
->mnt
)
1858 if (cur
.dentry
== cur
.mnt
->mnt_root
) {
1859 if (follow_up(&cur
))
1863 if ((ncomponents
& 15) == 0) {
1864 struct dentry
**new;
1865 new = krealloc(components
,
1866 sizeof(*new) * (ncomponents
+ 16),
1872 components
[ncomponents
++] = cur
.dentry
;
1873 cur
.dentry
= dget_parent(cur
.dentry
);
1879 WRITE32(ncomponents
);
1881 while (ncomponents
) {
1882 struct dentry
*dentry
= components
[ncomponents
- 1];
1885 spin_lock(&dentry
->d_lock
);
1886 len
= dentry
->d_name
.len
;
1887 *buflen
-= 4 + (XDR_QUADLEN(len
) << 2);
1889 spin_unlock(&dentry
->d_lock
);
1893 WRITEMEM(dentry
->d_name
.name
, len
);
1894 dprintk("/%s", dentry
->d_name
.name
);
1895 spin_unlock(&dentry
->d_lock
);
1905 dput(components
[--ncomponents
]);
1911 static __be32
nfsd4_encode_fsloc_fsroot(struct svc_rqst
*rqstp
,
1912 const struct path
*path
, __be32
**pp
, int *buflen
)
1914 struct svc_export
*exp_ps
;
1917 exp_ps
= rqst_find_fsidzero_export(rqstp
);
1919 return nfserrno(PTR_ERR(exp_ps
));
1920 res
= nfsd4_encode_path(&exp_ps
->ex_path
, path
, pp
, buflen
);
1926 * encode a fs_locations structure
1928 static __be32
nfsd4_encode_fs_locations(struct svc_rqst
*rqstp
,
1929 struct svc_export
*exp
,
1930 __be32
**pp
, int *buflen
)
1935 struct nfsd4_fs_locations
*fslocs
= &exp
->ex_fslocs
;
1937 status
= nfsd4_encode_fsloc_fsroot(rqstp
, &exp
->ex_path
, &p
, buflen
);
1940 if ((*buflen
-= 4) < 0)
1941 return nfserr_resource
;
1942 WRITE32(fslocs
->locations_count
);
1943 for (i
=0; i
<fslocs
->locations_count
; i
++) {
1944 status
= nfsd4_encode_fs_location4(&fslocs
->locations
[i
],
1953 static u32
nfs4_file_type(umode_t mode
)
1955 switch (mode
& S_IFMT
) {
1956 case S_IFIFO
: return NF4FIFO
;
1957 case S_IFCHR
: return NF4CHR
;
1958 case S_IFDIR
: return NF4DIR
;
1959 case S_IFBLK
: return NF4BLK
;
1960 case S_IFLNK
: return NF4LNK
;
1961 case S_IFREG
: return NF4REG
;
1962 case S_IFSOCK
: return NF4SOCK
;
1963 default: return NF4BAD
;
1967 static inline __be32
1968 nfsd4_encode_aclname(struct svc_rqst
*rqstp
, struct nfs4_ace
*ace
,
1969 __be32
**p
, int *buflen
)
1971 if (ace
->whotype
!= NFS4_ACL_WHO_NAMED
)
1972 return nfs4_acl_write_who(ace
->whotype
, p
, buflen
);
1973 else if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
1974 return nfsd4_encode_group(rqstp
, ace
->who_gid
, p
, buflen
);
1976 return nfsd4_encode_user(rqstp
, ace
->who_uid
, p
, buflen
);
1979 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1980 FATTR4_WORD0_RDATTR_ERROR)
1981 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1983 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1984 static inline __be32
1985 nfsd4_encode_security_label(struct svc_rqst
*rqstp
, void *context
, int len
, __be32
**pp
, int *buflen
)
1989 if (*buflen
< ((XDR_QUADLEN(len
) << 2) + 4 + 4 + 4))
1990 return nfserr_resource
;
1993 * For now we use a 0 here to indicate the null translation; in
1994 * the future we may place a call to translation code here.
1996 if ((*buflen
-= 8) < 0)
1997 return nfserr_resource
;
1999 WRITE32(0); /* lfs */
2000 WRITE32(0); /* pi */
2001 p
= xdr_encode_opaque(p
, context
, len
);
2002 *buflen
-= (XDR_QUADLEN(len
) << 2) + 4;
2008 static inline __be32
2009 nfsd4_encode_security_label(struct svc_rqst
*rqstp
, void *context
, int len
, __be32
**pp
, int *buflen
)
2013 static __be32
fattr_handle_absent_fs(u32
*bmval0
, u32
*bmval1
, u32
*rdattr_err
)
2015 /* As per referral draft: */
2016 if (*bmval0
& ~WORD0_ABSENT_FS_ATTRS
||
2017 *bmval1
& ~WORD1_ABSENT_FS_ATTRS
) {
2018 if (*bmval0
& FATTR4_WORD0_RDATTR_ERROR
||
2019 *bmval0
& FATTR4_WORD0_FS_LOCATIONS
)
2020 *rdattr_err
= NFSERR_MOVED
;
2022 return nfserr_moved
;
2024 *bmval0
&= WORD0_ABSENT_FS_ATTRS
;
2025 *bmval1
&= WORD1_ABSENT_FS_ATTRS
;
2030 static int get_parent_attributes(struct svc_export
*exp
, struct kstat
*stat
)
2032 struct path path
= exp
->ex_path
;
2036 while (follow_up(&path
)) {
2037 if (path
.dentry
!= path
.mnt
->mnt_root
)
2040 err
= vfs_getattr(&path
, stat
);
2046 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2049 * countp is the buffer size in _words_
2052 nfsd4_encode_fattr(struct svc_fh
*fhp
, struct svc_export
*exp
,
2053 struct dentry
*dentry
, __be32
**buffer
, int count
, u32
*bmval
,
2054 struct svc_rqst
*rqstp
, int ignore_crossmnt
)
2056 u32 bmval0
= bmval
[0];
2057 u32 bmval1
= bmval
[1];
2058 u32 bmval2
= bmval
[2];
2060 struct svc_fh
*tempfh
= NULL
;
2061 struct kstatfs statfs
;
2062 int buflen
= count
<< 2;
2067 __be32
*p
= *buffer
;
2071 struct nfs4_acl
*acl
= NULL
;
2072 void *context
= NULL
;
2074 bool contextsupport
= false;
2075 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2076 u32 minorversion
= resp
->cstate
.minorversion
;
2077 struct path path
= {
2078 .mnt
= exp
->ex_path
.mnt
,
2081 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2083 BUG_ON(bmval1
& NFSD_WRITEONLY_ATTRS_WORD1
);
2084 BUG_ON(bmval0
& ~nfsd_suppattrs0(minorversion
));
2085 BUG_ON(bmval1
& ~nfsd_suppattrs1(minorversion
));
2086 BUG_ON(bmval2
& ~nfsd_suppattrs2(minorversion
));
2088 if (exp
->ex_fslocs
.migrated
) {
2090 status
= fattr_handle_absent_fs(&bmval0
, &bmval1
, &rdattr_err
);
2095 err
= vfs_getattr(&path
, &stat
);
2098 if ((bmval0
& (FATTR4_WORD0_FILES_FREE
| FATTR4_WORD0_FILES_TOTAL
|
2099 FATTR4_WORD0_MAXNAME
)) ||
2100 (bmval1
& (FATTR4_WORD1_SPACE_AVAIL
| FATTR4_WORD1_SPACE_FREE
|
2101 FATTR4_WORD1_SPACE_TOTAL
))) {
2102 err
= vfs_statfs(&path
, &statfs
);
2106 if ((bmval0
& (FATTR4_WORD0_FILEHANDLE
| FATTR4_WORD0_FSID
)) && !fhp
) {
2107 tempfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
2108 status
= nfserr_jukebox
;
2111 fh_init(tempfh
, NFS4_FHSIZE
);
2112 status
= fh_compose(tempfh
, exp
, dentry
, NULL
);
2117 if (bmval0
& (FATTR4_WORD0_ACL
| FATTR4_WORD0_ACLSUPPORT
2118 | FATTR4_WORD0_SUPPORTED_ATTRS
)) {
2119 err
= nfsd4_get_nfs4_acl(rqstp
, dentry
, &acl
);
2120 aclsupport
= (err
== 0);
2121 if (bmval0
& FATTR4_WORD0_ACL
) {
2122 if (err
== -EOPNOTSUPP
)
2123 bmval0
&= ~FATTR4_WORD0_ACL
;
2124 else if (err
== -EINVAL
) {
2125 status
= nfserr_attrnotsupp
;
2127 } else if (err
!= 0)
2132 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2133 if ((bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) ||
2134 bmval
[0] & FATTR4_WORD0_SUPPORTED_ATTRS
) {
2135 err
= security_inode_getsecctx(dentry
->d_inode
,
2136 &context
, &contextlen
);
2137 contextsupport
= (err
== 0);
2138 if (bmval2
& FATTR4_WORD2_SECURITY_LABEL
) {
2139 if (err
== -EOPNOTSUPP
)
2140 bmval2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
2145 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2148 if ((buflen
-= 16) < 0)
2154 } else if (bmval1
) {
2155 if ((buflen
-= 12) < 0)
2161 if ((buflen
-= 8) < 0)
2166 attrlenp
= p
++; /* to be backfilled later */
2168 if (bmval0
& FATTR4_WORD0_SUPPORTED_ATTRS
) {
2169 u32 word0
= nfsd_suppattrs0(minorversion
);
2170 u32 word1
= nfsd_suppattrs1(minorversion
);
2171 u32 word2
= nfsd_suppattrs2(minorversion
);
2174 word0
&= ~FATTR4_WORD0_ACL
;
2175 if (!contextsupport
)
2176 word2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
2178 if ((buflen
-= 12) < 0)
2184 if ((buflen
-= 16) < 0)
2192 if (bmval0
& FATTR4_WORD0_TYPE
) {
2193 if ((buflen
-= 4) < 0)
2195 dummy
= nfs4_file_type(stat
.mode
);
2196 if (dummy
== NF4BAD
) {
2197 status
= nfserr_serverfault
;
2202 if (bmval0
& FATTR4_WORD0_FH_EXPIRE_TYPE
) {
2203 if ((buflen
-= 4) < 0)
2205 if (exp
->ex_flags
& NFSEXP_NOSUBTREECHECK
)
2206 WRITE32(NFS4_FH_PERSISTENT
);
2208 WRITE32(NFS4_FH_PERSISTENT
|NFS4_FH_VOL_RENAME
);
2210 if (bmval0
& FATTR4_WORD0_CHANGE
) {
2211 if ((buflen
-= 8) < 0)
2213 write_change(&p
, &stat
, dentry
->d_inode
);
2215 if (bmval0
& FATTR4_WORD0_SIZE
) {
2216 if ((buflen
-= 8) < 0)
2220 if (bmval0
& FATTR4_WORD0_LINK_SUPPORT
) {
2221 if ((buflen
-= 4) < 0)
2225 if (bmval0
& FATTR4_WORD0_SYMLINK_SUPPORT
) {
2226 if ((buflen
-= 4) < 0)
2230 if (bmval0
& FATTR4_WORD0_NAMED_ATTR
) {
2231 if ((buflen
-= 4) < 0)
2235 if (bmval0
& FATTR4_WORD0_FSID
) {
2236 if ((buflen
-= 16) < 0)
2238 if (exp
->ex_fslocs
.migrated
) {
2239 WRITE64(NFS4_REFERRAL_FSID_MAJOR
);
2240 WRITE64(NFS4_REFERRAL_FSID_MINOR
);
2241 } else switch(fsid_source(fhp
)) {
2242 case FSIDSOURCE_FSID
:
2243 WRITE64((u64
)exp
->ex_fsid
);
2246 case FSIDSOURCE_DEV
:
2248 WRITE32(MAJOR(stat
.dev
));
2250 WRITE32(MINOR(stat
.dev
));
2252 case FSIDSOURCE_UUID
:
2253 WRITEMEM(exp
->ex_uuid
, 16);
2257 if (bmval0
& FATTR4_WORD0_UNIQUE_HANDLES
) {
2258 if ((buflen
-= 4) < 0)
2262 if (bmval0
& FATTR4_WORD0_LEASE_TIME
) {
2263 if ((buflen
-= 4) < 0)
2265 WRITE32(nn
->nfsd4_lease
);
2267 if (bmval0
& FATTR4_WORD0_RDATTR_ERROR
) {
2268 if ((buflen
-= 4) < 0)
2270 WRITE32(rdattr_err
);
2272 if (bmval0
& FATTR4_WORD0_ACL
) {
2273 struct nfs4_ace
*ace
;
2276 if ((buflen
-= 4) < 0)
2282 if ((buflen
-= 4) < 0)
2284 WRITE32(acl
->naces
);
2286 for (ace
= acl
->aces
; ace
< acl
->aces
+ acl
->naces
; ace
++) {
2287 if ((buflen
-= 4*3) < 0)
2291 WRITE32(ace
->access_mask
& NFS4_ACE_MASK_ALL
);
2292 status
= nfsd4_encode_aclname(rqstp
, ace
, &p
, &buflen
);
2298 if (bmval0
& FATTR4_WORD0_ACLSUPPORT
) {
2299 if ((buflen
-= 4) < 0)
2301 WRITE32(aclsupport
?
2302 ACL4_SUPPORT_ALLOW_ACL
|ACL4_SUPPORT_DENY_ACL
: 0);
2304 if (bmval0
& FATTR4_WORD0_CANSETTIME
) {
2305 if ((buflen
-= 4) < 0)
2309 if (bmval0
& FATTR4_WORD0_CASE_INSENSITIVE
) {
2310 if ((buflen
-= 4) < 0)
2314 if (bmval0
& FATTR4_WORD0_CASE_PRESERVING
) {
2315 if ((buflen
-= 4) < 0)
2319 if (bmval0
& FATTR4_WORD0_CHOWN_RESTRICTED
) {
2320 if ((buflen
-= 4) < 0)
2324 if (bmval0
& FATTR4_WORD0_FILEHANDLE
) {
2325 buflen
-= (XDR_QUADLEN(fhp
->fh_handle
.fh_size
) << 2) + 4;
2328 WRITE32(fhp
->fh_handle
.fh_size
);
2329 WRITEMEM(&fhp
->fh_handle
.fh_base
, fhp
->fh_handle
.fh_size
);
2331 if (bmval0
& FATTR4_WORD0_FILEID
) {
2332 if ((buflen
-= 8) < 0)
2336 if (bmval0
& FATTR4_WORD0_FILES_AVAIL
) {
2337 if ((buflen
-= 8) < 0)
2339 WRITE64((u64
) statfs
.f_ffree
);
2341 if (bmval0
& FATTR4_WORD0_FILES_FREE
) {
2342 if ((buflen
-= 8) < 0)
2344 WRITE64((u64
) statfs
.f_ffree
);
2346 if (bmval0
& FATTR4_WORD0_FILES_TOTAL
) {
2347 if ((buflen
-= 8) < 0)
2349 WRITE64((u64
) statfs
.f_files
);
2351 if (bmval0
& FATTR4_WORD0_FS_LOCATIONS
) {
2352 status
= nfsd4_encode_fs_locations(rqstp
, exp
, &p
, &buflen
);
2356 if (bmval0
& FATTR4_WORD0_HOMOGENEOUS
) {
2357 if ((buflen
-= 4) < 0)
2361 if (bmval0
& FATTR4_WORD0_MAXFILESIZE
) {
2362 if ((buflen
-= 8) < 0)
2364 WRITE64(exp
->ex_path
.mnt
->mnt_sb
->s_maxbytes
);
2366 if (bmval0
& FATTR4_WORD0_MAXLINK
) {
2367 if ((buflen
-= 4) < 0)
2371 if (bmval0
& FATTR4_WORD0_MAXNAME
) {
2372 if ((buflen
-= 4) < 0)
2374 WRITE32(statfs
.f_namelen
);
2376 if (bmval0
& FATTR4_WORD0_MAXREAD
) {
2377 if ((buflen
-= 8) < 0)
2379 WRITE64((u64
) svc_max_payload(rqstp
));
2381 if (bmval0
& FATTR4_WORD0_MAXWRITE
) {
2382 if ((buflen
-= 8) < 0)
2384 WRITE64((u64
) svc_max_payload(rqstp
));
2386 if (bmval1
& FATTR4_WORD1_MODE
) {
2387 if ((buflen
-= 4) < 0)
2389 WRITE32(stat
.mode
& S_IALLUGO
);
2391 if (bmval1
& FATTR4_WORD1_NO_TRUNC
) {
2392 if ((buflen
-= 4) < 0)
2396 if (bmval1
& FATTR4_WORD1_NUMLINKS
) {
2397 if ((buflen
-= 4) < 0)
2399 WRITE32(stat
.nlink
);
2401 if (bmval1
& FATTR4_WORD1_OWNER
) {
2402 status
= nfsd4_encode_user(rqstp
, stat
.uid
, &p
, &buflen
);
2406 if (bmval1
& FATTR4_WORD1_OWNER_GROUP
) {
2407 status
= nfsd4_encode_group(rqstp
, stat
.gid
, &p
, &buflen
);
2411 if (bmval1
& FATTR4_WORD1_RAWDEV
) {
2412 if ((buflen
-= 8) < 0)
2414 WRITE32((u32
) MAJOR(stat
.rdev
));
2415 WRITE32((u32
) MINOR(stat
.rdev
));
2417 if (bmval1
& FATTR4_WORD1_SPACE_AVAIL
) {
2418 if ((buflen
-= 8) < 0)
2420 dummy64
= (u64
)statfs
.f_bavail
* (u64
)statfs
.f_bsize
;
2423 if (bmval1
& FATTR4_WORD1_SPACE_FREE
) {
2424 if ((buflen
-= 8) < 0)
2426 dummy64
= (u64
)statfs
.f_bfree
* (u64
)statfs
.f_bsize
;
2429 if (bmval1
& FATTR4_WORD1_SPACE_TOTAL
) {
2430 if ((buflen
-= 8) < 0)
2432 dummy64
= (u64
)statfs
.f_blocks
* (u64
)statfs
.f_bsize
;
2435 if (bmval1
& FATTR4_WORD1_SPACE_USED
) {
2436 if ((buflen
-= 8) < 0)
2438 dummy64
= (u64
)stat
.blocks
<< 9;
2441 if (bmval1
& FATTR4_WORD1_TIME_ACCESS
) {
2442 if ((buflen
-= 12) < 0)
2444 WRITE64((s64
)stat
.atime
.tv_sec
);
2445 WRITE32(stat
.atime
.tv_nsec
);
2447 if (bmval1
& FATTR4_WORD1_TIME_DELTA
) {
2448 if ((buflen
-= 12) < 0)
2454 if (bmval1
& FATTR4_WORD1_TIME_METADATA
) {
2455 if ((buflen
-= 12) < 0)
2457 WRITE64((s64
)stat
.ctime
.tv_sec
);
2458 WRITE32(stat
.ctime
.tv_nsec
);
2460 if (bmval1
& FATTR4_WORD1_TIME_MODIFY
) {
2461 if ((buflen
-= 12) < 0)
2463 WRITE64((s64
)stat
.mtime
.tv_sec
);
2464 WRITE32(stat
.mtime
.tv_nsec
);
2466 if (bmval1
& FATTR4_WORD1_MOUNTED_ON_FILEID
) {
2467 if ((buflen
-= 8) < 0)
2470 * Get parent's attributes if not ignoring crossmount
2471 * and this is the root of a cross-mounted filesystem.
2473 if (ignore_crossmnt
== 0 &&
2474 dentry
== exp
->ex_path
.mnt
->mnt_root
)
2475 get_parent_attributes(exp
, &stat
);
2478 if (bmval2
& FATTR4_WORD2_SECURITY_LABEL
) {
2479 status
= nfsd4_encode_security_label(rqstp
, context
,
2480 contextlen
, &p
, &buflen
);
2484 if (bmval2
& FATTR4_WORD2_SUPPATTR_EXCLCREAT
) {
2485 if ((buflen
-= 16) < 0)
2488 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0
);
2489 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1
);
2490 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2
);
2493 *attrlenp
= htonl((char *)p
- (char *)attrlenp
- 4);
2498 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2500 security_release_secctx(context
, contextlen
);
2501 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2509 status
= nfserrno(err
);
2512 status
= nfserr_resource
;
2516 static inline int attributes_need_mount(u32
*bmval
)
2518 if (bmval
[0] & ~(FATTR4_WORD0_RDATTR_ERROR
| FATTR4_WORD0_LEASE_TIME
))
2520 if (bmval
[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID
)
2526 nfsd4_encode_dirent_fattr(struct nfsd4_readdir
*cd
,
2527 const char *name
, int namlen
, __be32
**p
, int buflen
)
2529 struct svc_export
*exp
= cd
->rd_fhp
->fh_export
;
2530 struct dentry
*dentry
;
2532 int ignore_crossmnt
= 0;
2534 dentry
= lookup_one_len(name
, cd
->rd_fhp
->fh_dentry
, namlen
);
2536 return nfserrno(PTR_ERR(dentry
));
2537 if (!dentry
->d_inode
) {
2539 * nfsd_buffered_readdir drops the i_mutex between
2540 * readdir and calling this callback, leaving a window
2541 * where this directory entry could have gone away.
2544 return nfserr_noent
;
2549 * In the case of a mountpoint, the client may be asking for
2550 * attributes that are only properties of the underlying filesystem
2551 * as opposed to the cross-mounted file system. In such a case,
2552 * we will not follow the cross mount and will fill the attribtutes
2553 * directly from the mountpoint dentry.
2555 if (nfsd_mountpoint(dentry
, exp
)) {
2558 if (!(exp
->ex_flags
& NFSEXP_V4ROOT
)
2559 && !attributes_need_mount(cd
->rd_bmval
)) {
2560 ignore_crossmnt
= 1;
2564 * Why the heck aren't we just using nfsd_lookup??
2565 * Different "."/".." handling? Something else?
2566 * At least, add a comment here to explain....
2568 err
= nfsd_cross_mnt(cd
->rd_rqstp
, &dentry
, &exp
);
2570 nfserr
= nfserrno(err
);
2573 nfserr
= check_nfsd_access(exp
, cd
->rd_rqstp
);
2579 nfserr
= nfsd4_encode_fattr(NULL
, exp
, dentry
, p
, buflen
, cd
->rd_bmval
,
2580 cd
->rd_rqstp
, ignore_crossmnt
);
2588 nfsd4_encode_rdattr_error(__be32
*p
, int buflen
, __be32 nfserr
)
2593 *p
++ = htonl(FATTR4_WORD0_RDATTR_ERROR
); /* bmval0 */
2594 *p
++ = htonl(0); /* bmval1 */
2596 *p
++ = htonl(4); /* attribute length */
2597 *p
++ = nfserr
; /* no htonl */
2602 nfsd4_encode_dirent(void *ccdv
, const char *name
, int namlen
,
2603 loff_t offset
, u64 ino
, unsigned int d_type
)
2605 struct readdir_cd
*ccd
= ccdv
;
2606 struct nfsd4_readdir
*cd
= container_of(ccd
, struct nfsd4_readdir
, common
);
2608 __be32
*p
= cd
->buffer
;
2610 __be32 nfserr
= nfserr_toosmall
;
2612 /* In nfsv4, "." and ".." never make it onto the wire.. */
2613 if (name
&& isdotent(name
, namlen
)) {
2614 cd
->common
.err
= nfs_ok
;
2619 xdr_encode_hyper(cd
->offset
, (u64
) offset
);
2621 buflen
= cd
->buflen
- 4 - XDR_QUADLEN(namlen
);
2625 *p
++ = xdr_one
; /* mark entry present */
2627 p
= xdr_encode_hyper(p
, NFS_OFFSET_MAX
); /* offset of next entry */
2628 p
= xdr_encode_array(p
, name
, namlen
); /* name length & name */
2630 nfserr
= nfsd4_encode_dirent_fattr(cd
, name
, namlen
, &p
, buflen
);
2634 case nfserr_resource
:
2635 nfserr
= nfserr_toosmall
;
2641 * If the client requested the RDATTR_ERROR attribute,
2642 * we stuff the error code into this attribute
2643 * and continue. If this attribute was not requested,
2644 * then in accordance with the spec, we fail the
2645 * entire READDIR operation(!)
2647 if (!(cd
->rd_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
))
2649 p
= nfsd4_encode_rdattr_error(p
, buflen
, nfserr
);
2651 nfserr
= nfserr_toosmall
;
2655 cd
->buflen
-= (p
- cd
->buffer
);
2657 cd
->offset
= cookiep
;
2659 cd
->common
.err
= nfs_ok
;
2662 cd
->common
.err
= nfserr
;
2667 nfsd4_encode_stateid(struct nfsd4_compoundres
*resp
, stateid_t
*sid
)
2671 RESERVE_SPACE(sizeof(stateid_t
));
2672 WRITE32(sid
->si_generation
);
2673 WRITEMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
2678 nfsd4_encode_access(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_access
*access
)
2684 WRITE32(access
->ac_supported
);
2685 WRITE32(access
->ac_resp_access
);
2691 static __be32
nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_bind_conn_to_session
*bcts
)
2696 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN
+ 8);
2697 WRITEMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
2699 /* Sorry, we do not yet support RDMA over 4.1: */
2707 nfsd4_encode_close(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_close
*close
)
2710 nfsd4_encode_stateid(resp
, &close
->cl_stateid
);
2717 nfsd4_encode_commit(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_commit
*commit
)
2722 RESERVE_SPACE(NFS4_VERIFIER_SIZE
);
2723 WRITEMEM(commit
->co_verf
.data
, NFS4_VERIFIER_SIZE
);
2730 nfsd4_encode_create(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_create
*create
)
2736 write_cinfo(&p
, &create
->cr_cinfo
);
2738 WRITE32(create
->cr_bmval
[0]);
2739 WRITE32(create
->cr_bmval
[1]);
2746 nfsd4_encode_getattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_getattr
*getattr
)
2748 struct svc_fh
*fhp
= getattr
->ga_fhp
;
2754 buflen
= resp
->end
- resp
->p
- (COMPOUND_ERR_SLACK_SPACE
>> 2);
2755 nfserr
= nfsd4_encode_fattr(fhp
, fhp
->fh_export
, fhp
->fh_dentry
,
2756 &resp
->p
, buflen
, getattr
->ga_bmval
,
2762 nfsd4_encode_getfh(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct svc_fh
**fhpp
)
2764 struct svc_fh
*fhp
= *fhpp
;
2769 len
= fhp
->fh_handle
.fh_size
;
2770 RESERVE_SPACE(len
+ 4);
2772 WRITEMEM(&fhp
->fh_handle
.fh_base
, len
);
2779 * Including all fields other than the name, a LOCK4denied structure requires
2780 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2783 nfsd4_encode_lock_denied(struct nfsd4_compoundres
*resp
, struct nfsd4_lock_denied
*ld
)
2785 struct xdr_netobj
*conf
= &ld
->ld_owner
;
2788 RESERVE_SPACE(32 + XDR_LEN(conf
->len
));
2789 WRITE64(ld
->ld_start
);
2790 WRITE64(ld
->ld_length
);
2791 WRITE32(ld
->ld_type
);
2793 WRITEMEM(&ld
->ld_clientid
, 8);
2795 WRITEMEM(conf
->data
, conf
->len
);
2797 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2798 WRITE64((u64
)0); /* clientid */
2799 WRITE32(0); /* length of owner name */
2805 nfsd4_encode_lock(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lock
*lock
)
2808 nfsd4_encode_stateid(resp
, &lock
->lk_resp_stateid
);
2809 else if (nfserr
== nfserr_denied
)
2810 nfsd4_encode_lock_denied(resp
, &lock
->lk_denied
);
2816 nfsd4_encode_lockt(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lockt
*lockt
)
2818 if (nfserr
== nfserr_denied
)
2819 nfsd4_encode_lock_denied(resp
, &lockt
->lt_denied
);
2824 nfsd4_encode_locku(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_locku
*locku
)
2827 nfsd4_encode_stateid(resp
, &locku
->lu_stateid
);
2834 nfsd4_encode_link(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_link
*link
)
2840 write_cinfo(&p
, &link
->li_cinfo
);
2848 nfsd4_encode_open(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open
*open
)
2855 nfsd4_encode_stateid(resp
, &open
->op_stateid
);
2857 write_cinfo(&p
, &open
->op_cinfo
);
2858 WRITE32(open
->op_rflags
);
2860 WRITE32(open
->op_bmval
[0]);
2861 WRITE32(open
->op_bmval
[1]);
2862 WRITE32(open
->op_delegate_type
);
2865 switch (open
->op_delegate_type
) {
2866 case NFS4_OPEN_DELEGATE_NONE
:
2868 case NFS4_OPEN_DELEGATE_READ
:
2869 nfsd4_encode_stateid(resp
, &open
->op_delegate_stateid
);
2871 WRITE32(open
->op_recall
);
2874 * TODO: ACE's in delegations
2876 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
2879 WRITE32(0); /* XXX: is NULL principal ok? */
2882 case NFS4_OPEN_DELEGATE_WRITE
:
2883 nfsd4_encode_stateid(resp
, &open
->op_delegate_stateid
);
2888 * TODO: space_limit's in delegations
2890 WRITE32(NFS4_LIMIT_SIZE
);
2895 * TODO: ACE's in delegations
2897 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
2900 WRITE32(0); /* XXX: is NULL principal ok? */
2903 case NFS4_OPEN_DELEGATE_NONE_EXT
: /* 4.1 */
2904 switch (open
->op_why_no_deleg
) {
2905 case WND4_CONTENTION
:
2908 WRITE32(open
->op_why_no_deleg
);
2909 WRITE32(0); /* deleg signaling not supported yet */
2913 WRITE32(open
->op_why_no_deleg
);
2920 /* XXX save filehandle here */
2926 nfsd4_encode_open_confirm(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_confirm
*oc
)
2929 nfsd4_encode_stateid(resp
, &oc
->oc_resp_stateid
);
2935 nfsd4_encode_open_downgrade(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_downgrade
*od
)
2938 nfsd4_encode_stateid(resp
, &od
->od_stateid
);
2944 nfsd4_encode_read(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
2945 struct nfsd4_read
*read
)
2950 unsigned long maxcount
;
2956 if (resp
->xbuf
->page_len
)
2957 return nfserr_resource
;
2959 RESERVE_SPACE(8); /* eof flag and byte count */
2961 maxcount
= svc_max_payload(resp
->rqstp
);
2962 if (maxcount
> read
->rd_length
)
2963 maxcount
= read
->rd_length
;
2968 page
= *(resp
->rqstp
->rq_next_page
);
2969 if (!page
) { /* ran out of pages */
2973 resp
->rqstp
->rq_vec
[v
].iov_base
= page_address(page
);
2974 resp
->rqstp
->rq_vec
[v
].iov_len
=
2975 len
< PAGE_SIZE
? len
: PAGE_SIZE
;
2976 resp
->rqstp
->rq_next_page
++;
2982 nfserr
= nfsd_read_file(read
->rd_rqstp
, read
->rd_fhp
, read
->rd_filp
,
2983 read
->rd_offset
, resp
->rqstp
->rq_vec
, read
->rd_vlen
,
2988 eof
= (read
->rd_offset
+ maxcount
>=
2989 read
->rd_fhp
->fh_dentry
->d_inode
->i_size
);
2994 resp
->xbuf
->head
[0].iov_len
= (char*)p
2995 - (char*)resp
->xbuf
->head
[0].iov_base
;
2996 resp
->xbuf
->page_len
= maxcount
;
2998 /* Use rest of head for padding and remaining ops: */
2999 resp
->xbuf
->tail
[0].iov_base
= p
;
3000 resp
->xbuf
->tail
[0].iov_len
= 0;
3004 resp
->xbuf
->tail
[0].iov_base
+= maxcount
&3;
3005 resp
->xbuf
->tail
[0].iov_len
= 4 - (maxcount
&3);
3012 nfsd4_encode_readlink(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readlink
*readlink
)
3020 if (resp
->xbuf
->page_len
)
3021 return nfserr_resource
;
3022 if (!*resp
->rqstp
->rq_next_page
)
3023 return nfserr_resource
;
3025 page
= page_address(*(resp
->rqstp
->rq_next_page
++));
3027 maxcount
= PAGE_SIZE
;
3031 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3032 * if they would overflow the buffer. Is this kosher in NFSv4? If
3033 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3034 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3036 nfserr
= nfsd_readlink(readlink
->rl_rqstp
, readlink
->rl_fhp
, page
, &maxcount
);
3037 if (nfserr
== nfserr_isdir
)
3038 return nfserr_inval
;
3044 resp
->xbuf
->head
[0].iov_len
= (char*)p
3045 - (char*)resp
->xbuf
->head
[0].iov_base
;
3046 resp
->xbuf
->page_len
= maxcount
;
3048 /* Use rest of head for padding and remaining ops: */
3049 resp
->xbuf
->tail
[0].iov_base
= p
;
3050 resp
->xbuf
->tail
[0].iov_len
= 0;
3054 resp
->xbuf
->tail
[0].iov_base
+= maxcount
&3;
3055 resp
->xbuf
->tail
[0].iov_len
= 4 - (maxcount
&3);
3062 nfsd4_encode_readdir(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readdir
*readdir
)
3066 __be32
*page
, *savep
, *tailbase
;
3071 if (resp
->xbuf
->page_len
)
3072 return nfserr_resource
;
3073 if (!*resp
->rqstp
->rq_next_page
)
3074 return nfserr_resource
;
3076 RESERVE_SPACE(NFS4_VERIFIER_SIZE
);
3079 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3083 resp
->xbuf
->head
[0].iov_len
= ((char*)resp
->p
) - (char*)resp
->xbuf
->head
[0].iov_base
;
3086 maxcount
= PAGE_SIZE
;
3087 if (maxcount
> readdir
->rd_maxcount
)
3088 maxcount
= readdir
->rd_maxcount
;
3091 * Convert from bytes to words, account for the two words already
3092 * written, make sure to leave two words at the end for the next
3093 * pointer and eof field.
3095 maxcount
= (maxcount
>> 2) - 4;
3097 nfserr
= nfserr_toosmall
;
3101 page
= page_address(*(resp
->rqstp
->rq_next_page
++));
3102 readdir
->common
.err
= 0;
3103 readdir
->buflen
= maxcount
;
3104 readdir
->buffer
= page
;
3105 readdir
->offset
= NULL
;
3107 offset
= readdir
->rd_cookie
;
3108 nfserr
= nfsd_readdir(readdir
->rd_rqstp
, readdir
->rd_fhp
,
3110 &readdir
->common
, nfsd4_encode_dirent
);
3111 if (nfserr
== nfs_ok
&&
3112 readdir
->common
.err
== nfserr_toosmall
&&
3113 readdir
->buffer
== page
)
3114 nfserr
= nfserr_toosmall
;
3118 if (readdir
->offset
)
3119 xdr_encode_hyper(readdir
->offset
, offset
);
3121 p
= readdir
->buffer
;
3122 *p
++ = 0; /* no more entries */
3123 *p
++ = htonl(readdir
->common
.err
== nfserr_eof
);
3124 resp
->xbuf
->page_len
= ((char*)p
) -
3125 (char*)page_address(*(resp
->rqstp
->rq_next_page
-1));
3127 /* Use rest of head for padding and remaining ops: */
3128 resp
->xbuf
->tail
[0].iov_base
= tailbase
;
3129 resp
->xbuf
->tail
[0].iov_len
= 0;
3130 resp
->p
= resp
->xbuf
->tail
[0].iov_base
;
3131 resp
->end
= resp
->p
+ (PAGE_SIZE
- resp
->xbuf
->head
[0].iov_len
)/4;
3141 nfsd4_encode_remove(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_remove
*remove
)
3147 write_cinfo(&p
, &remove
->rm_cinfo
);
3154 nfsd4_encode_rename(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_rename
*rename
)
3160 write_cinfo(&p
, &rename
->rn_sinfo
);
3161 write_cinfo(&p
, &rename
->rn_tinfo
);
3168 nfsd4_do_encode_secinfo(struct nfsd4_compoundres
*resp
,
3169 __be32 nfserr
, struct svc_export
*exp
)
3171 u32 i
, nflavs
, supported
;
3172 struct exp_flavor_info
*flavs
;
3173 struct exp_flavor_info def_flavs
[2];
3174 __be32
*p
, *flavorsp
;
3175 static bool report
= true;
3179 if (exp
->ex_nflavors
) {
3180 flavs
= exp
->ex_flavors
;
3181 nflavs
= exp
->ex_nflavors
;
3182 } else { /* Handling of some defaults in absence of real secinfo: */
3184 if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_UNIX
) {
3186 flavs
[0].pseudoflavor
= RPC_AUTH_UNIX
;
3187 flavs
[1].pseudoflavor
= RPC_AUTH_NULL
;
3188 } else if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_GSS
) {
3190 flavs
[0].pseudoflavor
3191 = svcauth_gss_flavor(exp
->ex_client
);
3194 flavs
[0].pseudoflavor
3195 = exp
->ex_client
->flavour
->flavour
;
3201 flavorsp
= p
++; /* to be backfilled later */
3204 for (i
= 0; i
< nflavs
; i
++) {
3205 rpc_authflavor_t pf
= flavs
[i
].pseudoflavor
;
3206 struct rpcsec_gss_info info
;
3208 if (rpcauth_get_gssinfo(pf
, &info
) == 0) {
3210 RESERVE_SPACE(4 + 4 + XDR_LEN(info
.oid
.len
) + 4 + 4);
3211 WRITE32(RPC_AUTH_GSS
);
3212 WRITE32(info
.oid
.len
);
3213 WRITEMEM(info
.oid
.data
, info
.oid
.len
);
3215 WRITE32(info
.service
);
3217 } else if (pf
< RPC_AUTH_MAXFLAVOR
) {
3224 pr_warn("NFS: SECINFO: security flavor %u "
3225 "is not supported\n", pf
);
3229 if (nflavs
!= supported
)
3231 *flavorsp
= htonl(supported
);
3240 nfsd4_encode_secinfo(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3241 struct nfsd4_secinfo
*secinfo
)
3243 return nfsd4_do_encode_secinfo(resp
, nfserr
, secinfo
->si_exp
);
3247 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3248 struct nfsd4_secinfo_no_name
*secinfo
)
3250 return nfsd4_do_encode_secinfo(resp
, nfserr
, secinfo
->sin_exp
);
3254 * The SETATTR encode routine is special -- it always encodes a bitmap,
3255 * regardless of the error status.
3258 nfsd4_encode_setattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setattr
*setattr
)
3271 WRITE32(setattr
->sa_bmval
[0]);
3272 WRITE32(setattr
->sa_bmval
[1]);
3273 WRITE32(setattr
->sa_bmval
[2]);
3280 nfsd4_encode_setclientid(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setclientid
*scd
)
3285 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE
);
3286 WRITEMEM(&scd
->se_clientid
, 8);
3287 WRITEMEM(&scd
->se_confirm
, NFS4_VERIFIER_SIZE
);
3290 else if (nfserr
== nfserr_clid_inuse
) {
3300 nfsd4_encode_write(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_write
*write
)
3306 WRITE32(write
->wr_bytes_written
);
3307 WRITE32(write
->wr_how_written
);
3308 WRITEMEM(write
->wr_verifier
.data
, NFS4_VERIFIER_SIZE
);
3314 static const u32 nfs4_minimal_spo_must_enforce
[2] = {
3315 [1] = 1 << (OP_BIND_CONN_TO_SESSION
- 32) |
3316 1 << (OP_EXCHANGE_ID
- 32) |
3317 1 << (OP_CREATE_SESSION
- 32) |
3318 1 << (OP_DESTROY_SESSION
- 32) |
3319 1 << (OP_DESTROY_CLIENTID
- 32)
3323 nfsd4_encode_exchange_id(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3324 struct nfsd4_exchange_id
*exid
)
3330 int server_scope_sz
;
3331 uint64_t minor_id
= 0;
3336 major_id
= utsname()->nodename
;
3337 major_id_sz
= strlen(major_id
);
3338 server_scope
= utsname()->nodename
;
3339 server_scope_sz
= strlen(server_scope
);
3342 8 /* eir_clientid */ +
3343 4 /* eir_sequenceid */ +
3347 WRITEMEM(&exid
->clientid
, 8);
3348 WRITE32(exid
->seqid
);
3349 WRITE32(exid
->flags
);
3351 WRITE32(exid
->spa_how
);
3354 switch (exid
->spa_how
) {
3358 /* spo_must_enforce, spo_must_allow */
3361 /* spo_must_enforce bitmap: */
3363 WRITE32(nfs4_minimal_spo_must_enforce
[0]);
3364 WRITE32(nfs4_minimal_spo_must_enforce
[1]);
3365 /* empty spo_must_allow bitmap: */
3375 8 /* so_minor_id */ +
3376 4 /* so_major_id.len */ +
3377 (XDR_QUADLEN(major_id_sz
) * 4) +
3378 4 /* eir_server_scope.len */ +
3379 (XDR_QUADLEN(server_scope_sz
) * 4) +
3380 4 /* eir_server_impl_id.count (0) */);
3382 /* The server_owner struct */
3383 WRITE64(minor_id
); /* Minor id */
3385 WRITE32(major_id_sz
);
3386 WRITEMEM(major_id
, major_id_sz
);
3389 WRITE32(server_scope_sz
);
3390 WRITEMEM(server_scope
, server_scope_sz
);
3392 /* Implementation id */
3393 WRITE32(0); /* zero length nfs_impl_id4 array */
3399 nfsd4_encode_create_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3400 struct nfsd4_create_session
*sess
)
3408 WRITEMEM(sess
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
3409 WRITE32(sess
->seqid
);
3410 WRITE32(sess
->flags
);
3414 WRITE32(0); /* headerpadsz */
3415 WRITE32(sess
->fore_channel
.maxreq_sz
);
3416 WRITE32(sess
->fore_channel
.maxresp_sz
);
3417 WRITE32(sess
->fore_channel
.maxresp_cached
);
3418 WRITE32(sess
->fore_channel
.maxops
);
3419 WRITE32(sess
->fore_channel
.maxreqs
);
3420 WRITE32(sess
->fore_channel
.nr_rdma_attrs
);
3423 if (sess
->fore_channel
.nr_rdma_attrs
) {
3425 WRITE32(sess
->fore_channel
.rdma_attrs
);
3430 WRITE32(0); /* headerpadsz */
3431 WRITE32(sess
->back_channel
.maxreq_sz
);
3432 WRITE32(sess
->back_channel
.maxresp_sz
);
3433 WRITE32(sess
->back_channel
.maxresp_cached
);
3434 WRITE32(sess
->back_channel
.maxops
);
3435 WRITE32(sess
->back_channel
.maxreqs
);
3436 WRITE32(sess
->back_channel
.nr_rdma_attrs
);
3439 if (sess
->back_channel
.nr_rdma_attrs
) {
3441 WRITE32(sess
->back_channel
.rdma_attrs
);
3448 nfsd4_encode_sequence(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3449 struct nfsd4_sequence
*seq
)
3456 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN
+ 20);
3457 WRITEMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
3458 WRITE32(seq
->seqid
);
3459 WRITE32(seq
->slotid
);
3460 /* Note slotid's are numbered from zero: */
3461 WRITE32(seq
->maxslots
- 1); /* sr_highest_slotid */
3462 WRITE32(seq
->maxslots
- 1); /* sr_target_highest_slotid */
3463 WRITE32(seq
->status_flags
);
3466 resp
->cstate
.datap
= p
; /* DRC cache data pointer */
3471 nfsd4_encode_test_stateid(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3472 struct nfsd4_test_stateid
*test_stateid
)
3474 struct nfsd4_test_stateid_id
*stateid
, *next
;
3480 RESERVE_SPACE(4 + (4 * test_stateid
->ts_num_ids
));
3481 *p
++ = htonl(test_stateid
->ts_num_ids
);
3483 list_for_each_entry_safe(stateid
, next
, &test_stateid
->ts_stateid_list
, ts_id_list
) {
3484 *p
++ = stateid
->ts_id_status
;
3492 nfsd4_encode_noop(struct nfsd4_compoundres
*resp
, __be32 nfserr
, void *p
)
3497 typedef __be32(* nfsd4_enc
)(struct nfsd4_compoundres
*, __be32
, void *);
3500 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3501 * since we don't need to filter out obsolete ops as this is
3502 * done in the decoding phase.
3504 static nfsd4_enc nfsd4_enc_ops
[] = {
3505 [OP_ACCESS
] = (nfsd4_enc
)nfsd4_encode_access
,
3506 [OP_CLOSE
] = (nfsd4_enc
)nfsd4_encode_close
,
3507 [OP_COMMIT
] = (nfsd4_enc
)nfsd4_encode_commit
,
3508 [OP_CREATE
] = (nfsd4_enc
)nfsd4_encode_create
,
3509 [OP_DELEGPURGE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3510 [OP_DELEGRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3511 [OP_GETATTR
] = (nfsd4_enc
)nfsd4_encode_getattr
,
3512 [OP_GETFH
] = (nfsd4_enc
)nfsd4_encode_getfh
,
3513 [OP_LINK
] = (nfsd4_enc
)nfsd4_encode_link
,
3514 [OP_LOCK
] = (nfsd4_enc
)nfsd4_encode_lock
,
3515 [OP_LOCKT
] = (nfsd4_enc
)nfsd4_encode_lockt
,
3516 [OP_LOCKU
] = (nfsd4_enc
)nfsd4_encode_locku
,
3517 [OP_LOOKUP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3518 [OP_LOOKUPP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3519 [OP_NVERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3520 [OP_OPEN
] = (nfsd4_enc
)nfsd4_encode_open
,
3521 [OP_OPENATTR
] = (nfsd4_enc
)nfsd4_encode_noop
,
3522 [OP_OPEN_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_open_confirm
,
3523 [OP_OPEN_DOWNGRADE
] = (nfsd4_enc
)nfsd4_encode_open_downgrade
,
3524 [OP_PUTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3525 [OP_PUTPUBFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3526 [OP_PUTROOTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3527 [OP_READ
] = (nfsd4_enc
)nfsd4_encode_read
,
3528 [OP_READDIR
] = (nfsd4_enc
)nfsd4_encode_readdir
,
3529 [OP_READLINK
] = (nfsd4_enc
)nfsd4_encode_readlink
,
3530 [OP_REMOVE
] = (nfsd4_enc
)nfsd4_encode_remove
,
3531 [OP_RENAME
] = (nfsd4_enc
)nfsd4_encode_rename
,
3532 [OP_RENEW
] = (nfsd4_enc
)nfsd4_encode_noop
,
3533 [OP_RESTOREFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3534 [OP_SAVEFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3535 [OP_SECINFO
] = (nfsd4_enc
)nfsd4_encode_secinfo
,
3536 [OP_SETATTR
] = (nfsd4_enc
)nfsd4_encode_setattr
,
3537 [OP_SETCLIENTID
] = (nfsd4_enc
)nfsd4_encode_setclientid
,
3538 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_noop
,
3539 [OP_VERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3540 [OP_WRITE
] = (nfsd4_enc
)nfsd4_encode_write
,
3541 [OP_RELEASE_LOCKOWNER
] = (nfsd4_enc
)nfsd4_encode_noop
,
3543 /* NFSv4.1 operations */
3544 [OP_BACKCHANNEL_CTL
] = (nfsd4_enc
)nfsd4_encode_noop
,
3545 [OP_BIND_CONN_TO_SESSION
] = (nfsd4_enc
)nfsd4_encode_bind_conn_to_session
,
3546 [OP_EXCHANGE_ID
] = (nfsd4_enc
)nfsd4_encode_exchange_id
,
3547 [OP_CREATE_SESSION
] = (nfsd4_enc
)nfsd4_encode_create_session
,
3548 [OP_DESTROY_SESSION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3549 [OP_FREE_STATEID
] = (nfsd4_enc
)nfsd4_encode_noop
,
3550 [OP_GET_DIR_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3551 [OP_GETDEVICEINFO
] = (nfsd4_enc
)nfsd4_encode_noop
,
3552 [OP_GETDEVICELIST
] = (nfsd4_enc
)nfsd4_encode_noop
,
3553 [OP_LAYOUTCOMMIT
] = (nfsd4_enc
)nfsd4_encode_noop
,
3554 [OP_LAYOUTGET
] = (nfsd4_enc
)nfsd4_encode_noop
,
3555 [OP_LAYOUTRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3556 [OP_SECINFO_NO_NAME
] = (nfsd4_enc
)nfsd4_encode_secinfo_no_name
,
3557 [OP_SEQUENCE
] = (nfsd4_enc
)nfsd4_encode_sequence
,
3558 [OP_SET_SSV
] = (nfsd4_enc
)nfsd4_encode_noop
,
3559 [OP_TEST_STATEID
] = (nfsd4_enc
)nfsd4_encode_test_stateid
,
3560 [OP_WANT_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3561 [OP_DESTROY_CLIENTID
] = (nfsd4_enc
)nfsd4_encode_noop
,
3562 [OP_RECLAIM_COMPLETE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3566 * Calculate the total amount of memory that the compound response has taken
3567 * after encoding the current operation with pad.
3569 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3570 * which was specified at nfsd4_operation, else pad is zero.
3572 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3574 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3575 * will be at least a page and will therefore hold the xdr_buf head.
3577 __be32
nfsd4_check_resp_size(struct nfsd4_compoundres
*resp
, u32 pad
)
3579 struct xdr_buf
*xb
= &resp
->rqstp
->rq_res
;
3580 struct nfsd4_session
*session
= NULL
;
3581 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
3582 u32 length
, tlen
= 0;
3584 if (!nfsd4_has_session(&resp
->cstate
))
3587 session
= resp
->cstate
.session
;
3589 if (xb
->page_len
== 0) {
3590 length
= (char *)resp
->p
- (char *)xb
->head
[0].iov_base
+ pad
;
3592 if (xb
->tail
[0].iov_base
&& xb
->tail
[0].iov_len
> 0)
3593 tlen
= (char *)resp
->p
- (char *)xb
->tail
[0].iov_base
;
3595 length
= xb
->head
[0].iov_len
+ xb
->page_len
+ tlen
+ pad
;
3597 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__
,
3598 length
, xb
->page_len
, tlen
, pad
);
3600 if (length
> session
->se_fchannel
.maxresp_sz
)
3601 return nfserr_rep_too_big
;
3603 if ((slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
) &&
3604 length
> session
->se_fchannel
.maxresp_cached
)
3605 return nfserr_rep_too_big_to_cache
;
3611 nfsd4_encode_operation(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3613 struct nfs4_stateowner
*so
= resp
->cstate
.replay_owner
;
3619 statp
= p
++; /* to be backfilled at the end */
3622 if (op
->opnum
== OP_ILLEGAL
)
3624 BUG_ON(op
->opnum
< 0 || op
->opnum
>= ARRAY_SIZE(nfsd4_enc_ops
) ||
3625 !nfsd4_enc_ops
[op
->opnum
]);
3626 op
->status
= nfsd4_enc_ops
[op
->opnum
](resp
, op
->status
, &op
->u
);
3627 /* nfsd4_check_resp_size guarantees enough room for error status */
3629 op
->status
= nfsd4_check_resp_size(resp
, 0);
3630 if (op
->status
== nfserr_resource
&& nfsd4_has_session(&resp
->cstate
)) {
3631 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
3633 if (slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)
3634 op
->status
= nfserr_rep_too_big_to_cache
;
3636 op
->status
= nfserr_rep_too_big
;
3639 so
->so_replay
.rp_status
= op
->status
;
3640 so
->so_replay
.rp_buflen
= (char *)resp
->p
- (char *)(statp
+1);
3641 memcpy(so
->so_replay
.rp_buf
, statp
+1, so
->so_replay
.rp_buflen
);
3645 * Note: We write the status directly, instead of using WRITE32(),
3646 * since it is already in network byte order.
3648 *statp
= op
->status
;
3652 * Encode the reply stored in the stateowner reply cache
3654 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3655 * previously sent already encoded operation.
3657 * called with nfs4_lock_state() held
3660 nfsd4_encode_replay(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3663 struct nfs4_replay
*rp
= op
->replay
;
3669 *p
++ = rp
->rp_status
; /* already xdr'ed */
3672 RESERVE_SPACE(rp
->rp_buflen
);
3673 WRITEMEM(rp
->rp_buf
, rp
->rp_buflen
);
3678 nfs4svc_encode_voidres(struct svc_rqst
*rqstp
, __be32
*p
, void *dummy
)
3680 return xdr_ressize_check(rqstp
, p
);
3683 int nfsd4_release_compoundargs(void *rq
, __be32
*p
, void *resp
)
3685 struct svc_rqst
*rqstp
= rq
;
3686 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
3688 if (args
->ops
!= args
->iops
) {
3690 args
->ops
= args
->iops
;
3694 while (args
->to_free
) {
3695 struct tmpbuf
*tb
= args
->to_free
;
3696 args
->to_free
= tb
->next
;
3697 tb
->release(tb
->buf
);
3704 nfs4svc_decode_compoundargs(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundargs
*args
)
3706 if (rqstp
->rq_arg
.head
[0].iov_len
% 4) {
3707 /* client is nuts */
3708 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3709 __func__
, svc_addr(rqstp
), be32_to_cpu(rqstp
->rq_xid
));
3713 args
->end
= rqstp
->rq_arg
.head
[0].iov_base
+ rqstp
->rq_arg
.head
[0].iov_len
;
3714 args
->pagelist
= rqstp
->rq_arg
.pages
;
3715 args
->pagelen
= rqstp
->rq_arg
.page_len
;
3717 args
->to_free
= NULL
;
3718 args
->ops
= args
->iops
;
3719 args
->rqstp
= rqstp
;
3721 return !nfsd4_decode_compound(args
);
3725 nfs4svc_encode_compoundres(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundres
*resp
)
3728 * All that remains is to write the tag and operation count...
3730 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
3733 *p
++ = htonl(resp
->taglen
);
3734 memcpy(p
, resp
->tag
, resp
->taglen
);
3735 p
+= XDR_QUADLEN(resp
->taglen
);
3736 *p
++ = htonl(resp
->opcnt
);
3738 if (rqstp
->rq_res
.page_len
)
3739 iov
= &rqstp
->rq_res
.tail
[0];
3741 iov
= &rqstp
->rq_res
.head
[0];
3742 iov
->iov_len
= ((char*)resp
->p
) - (char*)iov
->iov_base
;
3743 BUG_ON(iov
->iov_len
> PAGE_SIZE
);
3744 if (nfsd4_has_session(cs
)) {
3745 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3746 struct nfs4_client
*clp
= cs
->session
->se_client
;
3747 if (cs
->status
!= nfserr_replay_cache
) {
3748 nfsd4_store_cache_entry(resp
);
3749 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
3751 /* Renew the clientid on success and on replay */
3752 spin_lock(&nn
->client_lock
);
3753 nfsd4_put_session(cs
->session
);
3754 spin_unlock(&nn
->client_lock
);
3755 put_client_renew(clp
);