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>
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
68 check_filename(char *str
, int len
, __be32 err
)
74 if (isdotent(str
, len
))
76 for (i
= 0; i
< len
; i
++)
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
95 #define READ32(x) (x) = ntohl(*p++)
96 #define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
100 #define READTIME(x) do { \
105 #define READMEM(x,nbytes) do { \
107 p += XDR_QUADLEN(nbytes); \
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
117 p += XDR_QUADLEN(nbytes); \
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
136 static void save_buf(struct nfsd4_compoundargs
*argp
, struct nfsd4_saved_compoundargs
*savep
)
139 savep
->end
= argp
->end
;
140 savep
->pagelen
= argp
->pagelen
;
141 savep
->pagelist
= argp
->pagelist
;
144 static void restore_buf(struct nfsd4_compoundargs
*argp
, struct nfsd4_saved_compoundargs
*savep
)
147 argp
->end
= savep
->end
;
148 argp
->pagelen
= savep
->pagelen
;
149 argp
->pagelist
= savep
->pagelist
;
152 static __be32
*read_buf(struct nfsd4_compoundargs
*argp
, u32 nbytes
)
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
157 unsigned int avail
= (char *)argp
->end
- (char *)argp
->p
;
159 if (avail
+ argp
->pagelen
< nbytes
)
161 if (avail
+ PAGE_SIZE
< nbytes
) /* need more than a page !! */
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes
<= sizeof(argp
->tmp
))
168 p
= argp
->tmpp
= kmalloc(nbytes
, GFP_KERNEL
);
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
178 memcpy(p
, argp
->p
, avail
);
179 /* step to next page */
180 argp
->p
= page_address(argp
->pagelist
[0]);
182 if (argp
->pagelen
< PAGE_SIZE
) {
183 argp
->end
= argp
->p
+ (argp
->pagelen
>>2);
186 argp
->end
= argp
->p
+ (PAGE_SIZE
>>2);
187 argp
->pagelen
-= PAGE_SIZE
;
189 memcpy(((char*)p
)+avail
, argp
->p
, (nbytes
- avail
));
190 argp
->p
+= XDR_QUADLEN(nbytes
- avail
);
194 static int zero_clientid(clientid_t
*clid
)
196 return (clid
->cl_boot
== 0) && (clid
->cl_id
== 0);
200 defer_free(struct nfsd4_compoundargs
*argp
,
201 void (*release
)(const void *), void *p
)
205 tb
= kmalloc(sizeof(*tb
), GFP_KERNEL
);
209 tb
->release
= release
;
210 tb
->next
= argp
->to_free
;
215 static char *savemem(struct nfsd4_compoundargs
*argp
, __be32
*p
, int nbytes
)
217 if (p
== argp
->tmp
) {
218 p
= kmalloc(nbytes
, GFP_KERNEL
);
221 memcpy(p
, argp
->tmp
, nbytes
);
223 BUG_ON(p
!= argp
->tmpp
);
226 if (defer_free(argp
, kfree
, p
)) {
234 nfsd4_decode_bitmap(struct nfsd4_compoundargs
*argp
, u32
*bmval
)
248 READ_BUF(bmlen
<< 2);
260 nfsd4_decode_fattr(struct nfsd4_compoundargs
*argp
, u32
*bmval
,
261 struct iattr
*iattr
, struct nfs4_acl
**acl
)
263 int expected_len
, len
= 0;
270 if ((status
= nfsd4_decode_bitmap(argp
, bmval
)))
274 READ32(expected_len
);
276 if (bmval
[0] & FATTR4_WORD0_SIZE
) {
279 READ64(iattr
->ia_size
);
280 iattr
->ia_valid
|= ATTR_SIZE
;
282 if (bmval
[0] & FATTR4_WORD0_ACL
) {
284 struct nfs4_ace
*ace
;
286 READ_BUF(4); len
+= 4;
289 if (nace
> NFS4_ACL_MAX
)
290 return nfserr_resource
;
292 *acl
= nfs4_acl_new(nace
);
297 defer_free(argp
, kfree
, *acl
);
299 (*acl
)->naces
= nace
;
300 for (ace
= (*acl
)->aces
; ace
< (*acl
)->aces
+ nace
; ace
++) {
301 READ_BUF(16); len
+= 16;
304 READ32(ace
->access_mask
);
307 len
+= XDR_QUADLEN(dummy32
) << 2;
308 READMEM(buf
, dummy32
);
309 ace
->whotype
= nfs4_acl_get_whotype(buf
, dummy32
);
311 if (ace
->whotype
!= NFS4_ACL_WHO_NAMED
)
313 else if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
314 status
= nfsd_map_name_to_gid(argp
->rqstp
,
315 buf
, dummy32
, &ace
->who
);
317 status
= nfsd_map_name_to_uid(argp
->rqstp
,
318 buf
, dummy32
, &ace
->who
);
324 if (bmval
[1] & FATTR4_WORD1_MODE
) {
327 READ32(iattr
->ia_mode
);
328 iattr
->ia_mode
&= (S_IFMT
| S_IALLUGO
);
329 iattr
->ia_valid
|= ATTR_MODE
;
331 if (bmval
[1] & FATTR4_WORD1_OWNER
) {
336 len
+= (XDR_QUADLEN(dummy32
) << 2);
337 READMEM(buf
, dummy32
);
338 if ((status
= nfsd_map_name_to_uid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_uid
)))
340 iattr
->ia_valid
|= ATTR_UID
;
342 if (bmval
[1] & FATTR4_WORD1_OWNER_GROUP
) {
347 len
+= (XDR_QUADLEN(dummy32
) << 2);
348 READMEM(buf
, dummy32
);
349 if ((status
= nfsd_map_name_to_gid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_gid
)))
351 iattr
->ia_valid
|= ATTR_GID
;
353 if (bmval
[1] & FATTR4_WORD1_TIME_ACCESS_SET
) {
358 case NFS4_SET_TO_CLIENT_TIME
:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
366 READ32(iattr
->ia_atime
.tv_sec
);
367 READ32(iattr
->ia_atime
.tv_nsec
);
368 if (iattr
->ia_atime
.tv_nsec
>= (u32
)1000000000)
370 iattr
->ia_valid
|= (ATTR_ATIME
| ATTR_ATIME_SET
);
372 case NFS4_SET_TO_SERVER_TIME
:
373 iattr
->ia_valid
|= ATTR_ATIME
;
379 if (bmval
[1] & FATTR4_WORD1_TIME_MODIFY_SET
) {
384 case NFS4_SET_TO_CLIENT_TIME
:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
392 READ32(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
;
405 if (bmval
[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval
[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval
[2] & ~NFSD_WRITEABLE_ATTRS_WORD2
)
408 READ_BUF(expected_len
- len
);
409 else if (len
!= expected_len
)
415 status
= nfserrno(host_err
);
420 nfsd4_decode_stateid(struct nfsd4_compoundargs
*argp
, stateid_t
*sid
)
424 READ_BUF(sizeof(stateid_t
));
425 READ32(sid
->si_generation
);
426 COPYMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
432 nfsd4_decode_access(struct nfsd4_compoundargs
*argp
, struct nfsd4_access
*access
)
437 READ32(access
->ac_req_access
);
442 static __be32
nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs
*argp
, struct nfsd4_bind_conn_to_session
*bcts
)
446 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 8);
447 COPYMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
455 nfsd4_decode_close(struct nfsd4_compoundargs
*argp
, struct nfsd4_close
*close
)
460 READ32(close
->cl_seqid
);
461 return nfsd4_decode_stateid(argp
, &close
->cl_stateid
);
468 nfsd4_decode_commit(struct nfsd4_compoundargs
*argp
, struct nfsd4_commit
*commit
)
473 READ64(commit
->co_offset
);
474 READ32(commit
->co_count
);
480 nfsd4_decode_create(struct nfsd4_compoundargs
*argp
, struct nfsd4_create
*create
)
485 READ32(create
->cr_type
);
486 switch (create
->cr_type
) {
489 READ32(create
->cr_linklen
);
490 READ_BUF(create
->cr_linklen
);
491 SAVEMEM(create
->cr_linkname
, create
->cr_linklen
);
496 READ32(create
->cr_specdata1
);
497 READ32(create
->cr_specdata2
);
507 READ32(create
->cr_namelen
);
508 READ_BUF(create
->cr_namelen
);
509 SAVEMEM(create
->cr_name
, create
->cr_namelen
);
510 if ((status
= check_filename(create
->cr_name
, create
->cr_namelen
, nfserr_inval
)))
513 status
= nfsd4_decode_fattr(argp
, create
->cr_bmval
, &create
->cr_iattr
,
522 nfsd4_decode_delegreturn(struct nfsd4_compoundargs
*argp
, struct nfsd4_delegreturn
*dr
)
524 return nfsd4_decode_stateid(argp
, &dr
->dr_stateid
);
528 nfsd4_decode_getattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_getattr
*getattr
)
530 return nfsd4_decode_bitmap(argp
, getattr
->ga_bmval
);
534 nfsd4_decode_link(struct nfsd4_compoundargs
*argp
, struct nfsd4_link
*link
)
539 READ32(link
->li_namelen
);
540 READ_BUF(link
->li_namelen
);
541 SAVEMEM(link
->li_name
, link
->li_namelen
);
542 if ((status
= check_filename(link
->li_name
, link
->li_namelen
, nfserr_inval
)))
549 nfsd4_decode_lock(struct nfsd4_compoundargs
*argp
, struct nfsd4_lock
*lock
)
554 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
557 READ32(lock
->lk_type
);
558 if ((lock
->lk_type
< NFS4_READ_LT
) || (lock
->lk_type
> NFS4_WRITEW_LT
))
560 READ32(lock
->lk_reclaim
);
561 READ64(lock
->lk_offset
);
562 READ64(lock
->lk_length
);
563 READ32(lock
->lk_is_new
);
565 if (lock
->lk_is_new
) {
567 READ32(lock
->lk_new_open_seqid
);
568 status
= nfsd4_decode_stateid(argp
, &lock
->lk_new_open_stateid
);
571 READ_BUF(8 + sizeof(clientid_t
));
572 READ32(lock
->lk_new_lock_seqid
);
573 COPYMEM(&lock
->lk_new_clientid
, sizeof(clientid_t
));
574 READ32(lock
->lk_new_owner
.len
);
575 READ_BUF(lock
->lk_new_owner
.len
);
576 READMEM(lock
->lk_new_owner
.data
, lock
->lk_new_owner
.len
);
578 status
= nfsd4_decode_stateid(argp
, &lock
->lk_old_lock_stateid
);
582 READ32(lock
->lk_old_lock_seqid
);
589 nfsd4_decode_lockt(struct nfsd4_compoundargs
*argp
, struct nfsd4_lockt
*lockt
)
594 READ32(lockt
->lt_type
);
595 if((lockt
->lt_type
< NFS4_READ_LT
) || (lockt
->lt_type
> NFS4_WRITEW_LT
))
597 READ64(lockt
->lt_offset
);
598 READ64(lockt
->lt_length
);
599 COPYMEM(&lockt
->lt_clientid
, 8);
600 READ32(lockt
->lt_owner
.len
);
601 READ_BUF(lockt
->lt_owner
.len
);
602 READMEM(lockt
->lt_owner
.data
, lockt
->lt_owner
.len
);
608 nfsd4_decode_locku(struct nfsd4_compoundargs
*argp
, struct nfsd4_locku
*locku
)
613 READ32(locku
->lu_type
);
614 if ((locku
->lu_type
< NFS4_READ_LT
) || (locku
->lu_type
> NFS4_WRITEW_LT
))
616 READ32(locku
->lu_seqid
);
617 status
= nfsd4_decode_stateid(argp
, &locku
->lu_stateid
);
621 READ64(locku
->lu_offset
);
622 READ64(locku
->lu_length
);
628 nfsd4_decode_lookup(struct nfsd4_compoundargs
*argp
, struct nfsd4_lookup
*lookup
)
633 READ32(lookup
->lo_len
);
634 READ_BUF(lookup
->lo_len
);
635 SAVEMEM(lookup
->lo_name
, lookup
->lo_len
);
636 if ((status
= check_filename(lookup
->lo_name
, lookup
->lo_len
, nfserr_noent
)))
643 nfsd4_decode_open(struct nfsd4_compoundargs
*argp
, struct nfsd4_open
*open
)
647 memset(open
->op_bmval
, 0, sizeof(open
->op_bmval
));
648 open
->op_iattr
.ia_valid
= 0;
649 open
->op_openowner
= NULL
;
651 /* seqid, share_access, share_deny, clientid, ownerlen */
652 READ_BUF(16 + sizeof(clientid_t
));
653 READ32(open
->op_seqid
);
654 READ32(open
->op_share_access
);
655 READ32(open
->op_share_deny
);
656 COPYMEM(&open
->op_clientid
, sizeof(clientid_t
));
657 READ32(open
->op_owner
.len
);
659 /* owner, open_flag */
660 READ_BUF(open
->op_owner
.len
+ 4);
661 SAVEMEM(open
->op_owner
.data
, open
->op_owner
.len
);
662 READ32(open
->op_create
);
663 switch (open
->op_create
) {
664 case NFS4_OPEN_NOCREATE
:
666 case NFS4_OPEN_CREATE
:
668 READ32(open
->op_createmode
);
669 switch (open
->op_createmode
) {
670 case NFS4_CREATE_UNCHECKED
:
671 case NFS4_CREATE_GUARDED
:
672 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
673 &open
->op_iattr
, &open
->op_acl
);
677 case NFS4_CREATE_EXCLUSIVE
:
679 COPYMEM(open
->op_verf
.data
, 8);
681 case NFS4_CREATE_EXCLUSIVE4_1
:
682 if (argp
->minorversion
< 1)
685 COPYMEM(open
->op_verf
.data
, 8);
686 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
687 &open
->op_iattr
, &open
->op_acl
);
701 READ32(open
->op_claim_type
);
702 switch (open
->op_claim_type
) {
703 case NFS4_OPEN_CLAIM_NULL
:
704 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
706 READ32(open
->op_fname
.len
);
707 READ_BUF(open
->op_fname
.len
);
708 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
709 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
, nfserr_inval
)))
712 case NFS4_OPEN_CLAIM_PREVIOUS
:
714 READ32(open
->op_delegate_type
);
716 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
717 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
721 READ32(open
->op_fname
.len
);
722 READ_BUF(open
->op_fname
.len
);
723 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
724 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
, nfserr_inval
)))
735 nfsd4_decode_open_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_confirm
*open_conf
)
739 status
= nfsd4_decode_stateid(argp
, &open_conf
->oc_req_stateid
);
743 READ32(open_conf
->oc_seqid
);
749 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_downgrade
*open_down
)
753 status
= nfsd4_decode_stateid(argp
, &open_down
->od_stateid
);
757 READ32(open_down
->od_seqid
);
758 READ32(open_down
->od_share_access
);
759 READ32(open_down
->od_share_deny
);
765 nfsd4_decode_putfh(struct nfsd4_compoundargs
*argp
, struct nfsd4_putfh
*putfh
)
770 READ32(putfh
->pf_fhlen
);
771 if (putfh
->pf_fhlen
> NFS4_FHSIZE
)
773 READ_BUF(putfh
->pf_fhlen
);
774 SAVEMEM(putfh
->pf_fhval
, putfh
->pf_fhlen
);
780 nfsd4_decode_read(struct nfsd4_compoundargs
*argp
, struct nfsd4_read
*read
)
784 status
= nfsd4_decode_stateid(argp
, &read
->rd_stateid
);
788 READ64(read
->rd_offset
);
789 READ32(read
->rd_length
);
795 nfsd4_decode_readdir(struct nfsd4_compoundargs
*argp
, struct nfsd4_readdir
*readdir
)
800 READ64(readdir
->rd_cookie
);
801 COPYMEM(readdir
->rd_verf
.data
, sizeof(readdir
->rd_verf
.data
));
802 READ32(readdir
->rd_dircount
); /* just in case you needed a useless field... */
803 READ32(readdir
->rd_maxcount
);
804 if ((status
= nfsd4_decode_bitmap(argp
, readdir
->rd_bmval
)))
811 nfsd4_decode_remove(struct nfsd4_compoundargs
*argp
, struct nfsd4_remove
*remove
)
816 READ32(remove
->rm_namelen
);
817 READ_BUF(remove
->rm_namelen
);
818 SAVEMEM(remove
->rm_name
, remove
->rm_namelen
);
819 if ((status
= check_filename(remove
->rm_name
, remove
->rm_namelen
, nfserr_noent
)))
826 nfsd4_decode_rename(struct nfsd4_compoundargs
*argp
, struct nfsd4_rename
*rename
)
831 READ32(rename
->rn_snamelen
);
832 READ_BUF(rename
->rn_snamelen
+ 4);
833 SAVEMEM(rename
->rn_sname
, rename
->rn_snamelen
);
834 READ32(rename
->rn_tnamelen
);
835 READ_BUF(rename
->rn_tnamelen
);
836 SAVEMEM(rename
->rn_tname
, rename
->rn_tnamelen
);
837 if ((status
= check_filename(rename
->rn_sname
, rename
->rn_snamelen
, nfserr_noent
)))
839 if ((status
= check_filename(rename
->rn_tname
, rename
->rn_tnamelen
, nfserr_inval
)))
846 nfsd4_decode_renew(struct nfsd4_compoundargs
*argp
, clientid_t
*clientid
)
850 READ_BUF(sizeof(clientid_t
));
851 COPYMEM(clientid
, sizeof(clientid_t
));
857 nfsd4_decode_secinfo(struct nfsd4_compoundargs
*argp
,
858 struct nfsd4_secinfo
*secinfo
)
863 READ32(secinfo
->si_namelen
);
864 READ_BUF(secinfo
->si_namelen
);
865 SAVEMEM(secinfo
->si_name
, secinfo
->si_namelen
);
866 status
= check_filename(secinfo
->si_name
, secinfo
->si_namelen
,
874 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs
*argp
,
875 struct nfsd4_secinfo_no_name
*sin
)
880 READ32(sin
->sin_style
);
885 nfsd4_decode_setattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_setattr
*setattr
)
889 status
= nfsd4_decode_stateid(argp
, &setattr
->sa_stateid
);
892 return nfsd4_decode_fattr(argp
, setattr
->sa_bmval
, &setattr
->sa_iattr
,
897 nfsd4_decode_setclientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid
*setclientid
)
902 COPYMEM(setclientid
->se_verf
.data
, 8);
903 READ32(setclientid
->se_namelen
);
905 READ_BUF(setclientid
->se_namelen
+ 8);
906 SAVEMEM(setclientid
->se_name
, setclientid
->se_namelen
);
907 READ32(setclientid
->se_callback_prog
);
908 READ32(setclientid
->se_callback_netid_len
);
910 READ_BUF(setclientid
->se_callback_netid_len
+ 4);
911 SAVEMEM(setclientid
->se_callback_netid_val
, setclientid
->se_callback_netid_len
);
912 READ32(setclientid
->se_callback_addr_len
);
914 READ_BUF(setclientid
->se_callback_addr_len
+ 4);
915 SAVEMEM(setclientid
->se_callback_addr_val
, setclientid
->se_callback_addr_len
);
916 READ32(setclientid
->se_callback_ident
);
922 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid_confirm
*scd_c
)
926 READ_BUF(8 + sizeof(nfs4_verifier
));
927 COPYMEM(&scd_c
->sc_clientid
, 8);
928 COPYMEM(&scd_c
->sc_confirm
, sizeof(nfs4_verifier
));
933 /* Also used for NVERIFY */
935 nfsd4_decode_verify(struct nfsd4_compoundargs
*argp
, struct nfsd4_verify
*verify
)
938 struct nfsd4_compoundargs save
= {
941 .rqstp
= argp
->rqstp
,
944 struct iattr ve_iattr
; /* request */
945 struct nfs4_acl
*ve_acl
; /* request */
949 if ((status
= nfsd4_decode_bitmap(argp
, verify
->ve_bmval
)))
952 /* For convenience's sake, we compare raw xdr'd attributes in
953 * nfsd4_proc_verify; however we still decode here just to return
954 * correct error in case of bad xdr. */
956 status
= nfsd4_decode_fattr(ve_bmval
, &ve_iattr
, &ve_acl
);
957 if (status
== nfserr_inval
) {
958 status
= nfserrno(status
);
963 READ32(verify
->ve_attrlen
);
964 READ_BUF(verify
->ve_attrlen
);
965 SAVEMEM(verify
->ve_attrval
, verify
->ve_attrlen
);
971 nfsd4_decode_write(struct nfsd4_compoundargs
*argp
, struct nfsd4_write
*write
)
978 status
= nfsd4_decode_stateid(argp
, &write
->wr_stateid
);
982 READ64(write
->wr_offset
);
983 READ32(write
->wr_stable_how
);
984 if (write
->wr_stable_how
> 2)
986 READ32(write
->wr_buflen
);
988 /* Sorry .. no magic macros for this.. *
989 * READ_BUF(write->wr_buflen);
990 * SAVEMEM(write->wr_buf, write->wr_buflen);
992 avail
= (char*)argp
->end
- (char*)argp
->p
;
993 if (avail
+ argp
->pagelen
< write
->wr_buflen
) {
994 dprintk("NFSD: xdr error (%s:%d)\n",
998 argp
->rqstp
->rq_vec
[0].iov_base
= p
;
999 argp
->rqstp
->rq_vec
[0].iov_len
= avail
;
1001 len
= write
->wr_buflen
;
1002 while (len
> argp
->rqstp
->rq_vec
[v
].iov_len
) {
1003 len
-= argp
->rqstp
->rq_vec
[v
].iov_len
;
1005 argp
->rqstp
->rq_vec
[v
].iov_base
= page_address(argp
->pagelist
[0]);
1007 if (argp
->pagelen
>= PAGE_SIZE
) {
1008 argp
->rqstp
->rq_vec
[v
].iov_len
= PAGE_SIZE
;
1009 argp
->pagelen
-= PAGE_SIZE
;
1011 argp
->rqstp
->rq_vec
[v
].iov_len
= argp
->pagelen
;
1012 argp
->pagelen
-= len
;
1015 argp
->end
= (__be32
*) (argp
->rqstp
->rq_vec
[v
].iov_base
+ argp
->rqstp
->rq_vec
[v
].iov_len
);
1016 argp
->p
= (__be32
*) (argp
->rqstp
->rq_vec
[v
].iov_base
+ (XDR_QUADLEN(len
) << 2));
1017 argp
->rqstp
->rq_vec
[v
].iov_len
= len
;
1018 write
->wr_vlen
= v
+1;
1024 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs
*argp
, struct nfsd4_release_lockowner
*rlockowner
)
1029 COPYMEM(&rlockowner
->rl_clientid
, sizeof(clientid_t
));
1030 READ32(rlockowner
->rl_owner
.len
);
1031 READ_BUF(rlockowner
->rl_owner
.len
);
1032 READMEM(rlockowner
->rl_owner
.data
, rlockowner
->rl_owner
.len
);
1034 if (argp
->minorversion
&& !zero_clientid(&rlockowner
->rl_clientid
))
1035 return nfserr_inval
;
1040 nfsd4_decode_exchange_id(struct nfsd4_compoundargs
*argp
,
1041 struct nfsd4_exchange_id
*exid
)
1046 READ_BUF(NFS4_VERIFIER_SIZE
);
1047 COPYMEM(exid
->verifier
.data
, NFS4_VERIFIER_SIZE
);
1050 READ32(exid
->clname
.len
);
1052 READ_BUF(exid
->clname
.len
);
1053 SAVEMEM(exid
->clname
.data
, exid
->clname
.len
);
1056 READ32(exid
->flags
);
1058 /* Ignore state_protect4_a */
1060 READ32(exid
->spa_how
);
1061 switch (exid
->spa_how
) {
1065 /* spo_must_enforce */
1068 READ_BUF(dummy
* 4);
1071 /* spo_must_allow */
1074 READ_BUF(dummy
* 4);
1081 READ_BUF(dummy
* 4);
1086 READ_BUF(dummy
* 4);
1089 /* ssp_hash_algs<> */
1096 p
+= XDR_QUADLEN(dummy
);
1099 /* ssp_encr_algs<> */
1106 p
+= XDR_QUADLEN(dummy
);
1109 /* ssp_window and ssp_num_gss_handles */
1118 /* Ignore Implementation ID */
1119 READ_BUF(4); /* nfs_impl_id4 array length */
1130 p
+= XDR_QUADLEN(dummy
);
1136 p
+= XDR_QUADLEN(dummy
);
1146 nfsd4_decode_create_session(struct nfsd4_compoundargs
*argp
,
1147 struct nfsd4_create_session
*sess
)
1157 COPYMEM(&sess
->clientid
, 8);
1158 READ32(sess
->seqid
);
1159 READ32(sess
->flags
);
1161 /* Fore channel attrs */
1163 READ32(dummy
); /* headerpadsz is always 0 */
1164 READ32(sess
->fore_channel
.maxreq_sz
);
1165 READ32(sess
->fore_channel
.maxresp_sz
);
1166 READ32(sess
->fore_channel
.maxresp_cached
);
1167 READ32(sess
->fore_channel
.maxops
);
1168 READ32(sess
->fore_channel
.maxreqs
);
1169 READ32(sess
->fore_channel
.nr_rdma_attrs
);
1170 if (sess
->fore_channel
.nr_rdma_attrs
== 1) {
1172 READ32(sess
->fore_channel
.rdma_attrs
);
1173 } else if (sess
->fore_channel
.nr_rdma_attrs
> 1) {
1174 dprintk("Too many fore channel attr bitmaps!\n");
1178 /* Back channel attrs */
1180 READ32(dummy
); /* headerpadsz is always 0 */
1181 READ32(sess
->back_channel
.maxreq_sz
);
1182 READ32(sess
->back_channel
.maxresp_sz
);
1183 READ32(sess
->back_channel
.maxresp_cached
);
1184 READ32(sess
->back_channel
.maxops
);
1185 READ32(sess
->back_channel
.maxreqs
);
1186 READ32(sess
->back_channel
.nr_rdma_attrs
);
1187 if (sess
->back_channel
.nr_rdma_attrs
== 1) {
1189 READ32(sess
->back_channel
.rdma_attrs
);
1190 } else if (sess
->back_channel
.nr_rdma_attrs
> 1) {
1191 dprintk("Too many back channel attr bitmaps!\n");
1196 READ32(sess
->callback_prog
);
1198 /* callback_sec_params4 */
1199 READ32(nr_secflavs
);
1200 for (i
= 0; i
< nr_secflavs
; ++i
) {
1205 /* Nothing to read */
1215 SAVEMEM(machine_name
, dummy
);
1225 READ_BUF(dummy
* 4);
1228 dprintk("RPC_AUTH_GSS callback secflavor "
1229 "not supported!\n");
1233 /* gcbp_handle_from_server */
1236 p
+= XDR_QUADLEN(dummy
);
1237 /* gcbp_handle_from_client */
1243 dprintk("Illegal callback secflavor\n");
1244 return nfserr_inval
;
1251 nfsd4_decode_destroy_session(struct nfsd4_compoundargs
*argp
,
1252 struct nfsd4_destroy_session
*destroy_session
)
1255 READ_BUF(NFS4_MAX_SESSIONID_LEN
);
1256 COPYMEM(destroy_session
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1262 nfsd4_decode_free_stateid(struct nfsd4_compoundargs
*argp
,
1263 struct nfsd4_free_stateid
*free_stateid
)
1267 READ_BUF(sizeof(stateid_t
));
1268 READ32(free_stateid
->fr_stateid
.si_generation
);
1269 COPYMEM(&free_stateid
->fr_stateid
.si_opaque
, sizeof(stateid_opaque_t
));
1275 nfsd4_decode_sequence(struct nfsd4_compoundargs
*argp
,
1276 struct nfsd4_sequence
*seq
)
1280 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 16);
1281 COPYMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1283 READ32(seq
->slotid
);
1284 READ32(seq
->maxslots
);
1285 READ32(seq
->cachethis
);
1291 nfsd4_decode_test_stateid(struct nfsd4_compoundargs
*argp
, struct nfsd4_test_stateid
*test_stateid
)
1293 unsigned int nbytes
;
1300 test_stateid
->ts_num_ids
= ntohl(*p
++);
1302 nbytes
= test_stateid
->ts_num_ids
* sizeof(stateid_t
);
1303 if (nbytes
> (u32
)((char *)argp
->end
- (char *)argp
->p
))
1306 test_stateid
->ts_saved_args
= argp
;
1307 save_buf(argp
, &test_stateid
->ts_savedp
);
1309 for (i
= 0; i
< test_stateid
->ts_num_ids
; i
++) {
1310 status
= nfsd4_decode_stateid(argp
, &si
);
1319 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__
, __LINE__
);
1320 status
= nfserr_bad_xdr
;
1324 static __be32
nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs
*argp
, struct nfsd4_reclaim_complete
*rc
)
1329 READ32(rc
->rca_one_fs
);
1335 nfsd4_decode_noop(struct nfsd4_compoundargs
*argp
, void *p
)
1341 nfsd4_decode_notsupp(struct nfsd4_compoundargs
*argp
, void *p
)
1343 return nfserr_notsupp
;
1346 typedef __be32(*nfsd4_dec
)(struct nfsd4_compoundargs
*argp
, void *);
1348 static nfsd4_dec nfsd4_dec_ops
[] = {
1349 [OP_ACCESS
] = (nfsd4_dec
)nfsd4_decode_access
,
1350 [OP_CLOSE
] = (nfsd4_dec
)nfsd4_decode_close
,
1351 [OP_COMMIT
] = (nfsd4_dec
)nfsd4_decode_commit
,
1352 [OP_CREATE
] = (nfsd4_dec
)nfsd4_decode_create
,
1353 [OP_DELEGPURGE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1354 [OP_DELEGRETURN
] = (nfsd4_dec
)nfsd4_decode_delegreturn
,
1355 [OP_GETATTR
] = (nfsd4_dec
)nfsd4_decode_getattr
,
1356 [OP_GETFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1357 [OP_LINK
] = (nfsd4_dec
)nfsd4_decode_link
,
1358 [OP_LOCK
] = (nfsd4_dec
)nfsd4_decode_lock
,
1359 [OP_LOCKT
] = (nfsd4_dec
)nfsd4_decode_lockt
,
1360 [OP_LOCKU
] = (nfsd4_dec
)nfsd4_decode_locku
,
1361 [OP_LOOKUP
] = (nfsd4_dec
)nfsd4_decode_lookup
,
1362 [OP_LOOKUPP
] = (nfsd4_dec
)nfsd4_decode_noop
,
1363 [OP_NVERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1364 [OP_OPEN
] = (nfsd4_dec
)nfsd4_decode_open
,
1365 [OP_OPENATTR
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1366 [OP_OPEN_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_open_confirm
,
1367 [OP_OPEN_DOWNGRADE
] = (nfsd4_dec
)nfsd4_decode_open_downgrade
,
1368 [OP_PUTFH
] = (nfsd4_dec
)nfsd4_decode_putfh
,
1369 [OP_PUTPUBFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1370 [OP_PUTROOTFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1371 [OP_READ
] = (nfsd4_dec
)nfsd4_decode_read
,
1372 [OP_READDIR
] = (nfsd4_dec
)nfsd4_decode_readdir
,
1373 [OP_READLINK
] = (nfsd4_dec
)nfsd4_decode_noop
,
1374 [OP_REMOVE
] = (nfsd4_dec
)nfsd4_decode_remove
,
1375 [OP_RENAME
] = (nfsd4_dec
)nfsd4_decode_rename
,
1376 [OP_RENEW
] = (nfsd4_dec
)nfsd4_decode_renew
,
1377 [OP_RESTOREFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1378 [OP_SAVEFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1379 [OP_SECINFO
] = (nfsd4_dec
)nfsd4_decode_secinfo
,
1380 [OP_SETATTR
] = (nfsd4_dec
)nfsd4_decode_setattr
,
1381 [OP_SETCLIENTID
] = (nfsd4_dec
)nfsd4_decode_setclientid
,
1382 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_setclientid_confirm
,
1383 [OP_VERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1384 [OP_WRITE
] = (nfsd4_dec
)nfsd4_decode_write
,
1385 [OP_RELEASE_LOCKOWNER
] = (nfsd4_dec
)nfsd4_decode_release_lockowner
,
1388 static nfsd4_dec nfsd41_dec_ops
[] = {
1389 [OP_ACCESS
] = (nfsd4_dec
)nfsd4_decode_access
,
1390 [OP_CLOSE
] = (nfsd4_dec
)nfsd4_decode_close
,
1391 [OP_COMMIT
] = (nfsd4_dec
)nfsd4_decode_commit
,
1392 [OP_CREATE
] = (nfsd4_dec
)nfsd4_decode_create
,
1393 [OP_DELEGPURGE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1394 [OP_DELEGRETURN
] = (nfsd4_dec
)nfsd4_decode_delegreturn
,
1395 [OP_GETATTR
] = (nfsd4_dec
)nfsd4_decode_getattr
,
1396 [OP_GETFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1397 [OP_LINK
] = (nfsd4_dec
)nfsd4_decode_link
,
1398 [OP_LOCK
] = (nfsd4_dec
)nfsd4_decode_lock
,
1399 [OP_LOCKT
] = (nfsd4_dec
)nfsd4_decode_lockt
,
1400 [OP_LOCKU
] = (nfsd4_dec
)nfsd4_decode_locku
,
1401 [OP_LOOKUP
] = (nfsd4_dec
)nfsd4_decode_lookup
,
1402 [OP_LOOKUPP
] = (nfsd4_dec
)nfsd4_decode_noop
,
1403 [OP_NVERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1404 [OP_OPEN
] = (nfsd4_dec
)nfsd4_decode_open
,
1405 [OP_OPENATTR
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1406 [OP_OPEN_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1407 [OP_OPEN_DOWNGRADE
] = (nfsd4_dec
)nfsd4_decode_open_downgrade
,
1408 [OP_PUTFH
] = (nfsd4_dec
)nfsd4_decode_putfh
,
1409 [OP_PUTPUBFH
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1410 [OP_PUTROOTFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1411 [OP_READ
] = (nfsd4_dec
)nfsd4_decode_read
,
1412 [OP_READDIR
] = (nfsd4_dec
)nfsd4_decode_readdir
,
1413 [OP_READLINK
] = (nfsd4_dec
)nfsd4_decode_noop
,
1414 [OP_REMOVE
] = (nfsd4_dec
)nfsd4_decode_remove
,
1415 [OP_RENAME
] = (nfsd4_dec
)nfsd4_decode_rename
,
1416 [OP_RENEW
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1417 [OP_RESTOREFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1418 [OP_SAVEFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1419 [OP_SECINFO
] = (nfsd4_dec
)nfsd4_decode_secinfo
,
1420 [OP_SETATTR
] = (nfsd4_dec
)nfsd4_decode_setattr
,
1421 [OP_SETCLIENTID
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1422 [OP_SETCLIENTID_CONFIRM
]= (nfsd4_dec
)nfsd4_decode_notsupp
,
1423 [OP_VERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1424 [OP_WRITE
] = (nfsd4_dec
)nfsd4_decode_write
,
1425 [OP_RELEASE_LOCKOWNER
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1427 /* new operations for NFSv4.1 */
1428 [OP_BACKCHANNEL_CTL
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1429 [OP_BIND_CONN_TO_SESSION
]= (nfsd4_dec
)nfsd4_decode_bind_conn_to_session
,
1430 [OP_EXCHANGE_ID
] = (nfsd4_dec
)nfsd4_decode_exchange_id
,
1431 [OP_CREATE_SESSION
] = (nfsd4_dec
)nfsd4_decode_create_session
,
1432 [OP_DESTROY_SESSION
] = (nfsd4_dec
)nfsd4_decode_destroy_session
,
1433 [OP_FREE_STATEID
] = (nfsd4_dec
)nfsd4_decode_free_stateid
,
1434 [OP_GET_DIR_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1435 [OP_GETDEVICEINFO
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1436 [OP_GETDEVICELIST
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1437 [OP_LAYOUTCOMMIT
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1438 [OP_LAYOUTGET
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1439 [OP_LAYOUTRETURN
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1440 [OP_SECINFO_NO_NAME
] = (nfsd4_dec
)nfsd4_decode_secinfo_no_name
,
1441 [OP_SEQUENCE
] = (nfsd4_dec
)nfsd4_decode_sequence
,
1442 [OP_SET_SSV
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1443 [OP_TEST_STATEID
] = (nfsd4_dec
)nfsd4_decode_test_stateid
,
1444 [OP_WANT_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1445 [OP_DESTROY_CLIENTID
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1446 [OP_RECLAIM_COMPLETE
] = (nfsd4_dec
)nfsd4_decode_reclaim_complete
,
1449 struct nfsd4_minorversion_ops
{
1450 nfsd4_dec
*decoders
;
1454 static struct nfsd4_minorversion_ops nfsd4_minorversion
[] = {
1455 [0] = { nfsd4_dec_ops
, ARRAY_SIZE(nfsd4_dec_ops
) },
1456 [1] = { nfsd41_dec_ops
, ARRAY_SIZE(nfsd41_dec_ops
) },
1460 nfsd4_decode_compound(struct nfsd4_compoundargs
*argp
)
1463 struct nfsd4_op
*op
;
1464 struct nfsd4_minorversion_ops
*ops
;
1465 bool cachethis
= false;
1469 * XXX: According to spec, we should check the tag
1470 * for UTF-8 compliance. I'm postponing this for
1471 * now because it seems that some clients do use
1475 READ32(argp
->taglen
);
1476 READ_BUF(argp
->taglen
+ 8);
1477 SAVEMEM(argp
->tag
, argp
->taglen
);
1478 READ32(argp
->minorversion
);
1479 READ32(argp
->opcnt
);
1481 if (argp
->taglen
> NFSD4_MAX_TAGLEN
)
1483 if (argp
->opcnt
> 100)
1486 if (argp
->opcnt
> ARRAY_SIZE(argp
->iops
)) {
1487 argp
->ops
= kmalloc(argp
->opcnt
* sizeof(*argp
->ops
), GFP_KERNEL
);
1489 argp
->ops
= argp
->iops
;
1490 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1495 if (argp
->minorversion
>= ARRAY_SIZE(nfsd4_minorversion
))
1498 ops
= &nfsd4_minorversion
[argp
->minorversion
];
1499 for (i
= 0; i
< argp
->opcnt
; i
++) {
1504 * We can't use READ_BUF() here because we need to handle
1505 * a missing opcode as an OP_WRITE + 1. So we need to check
1506 * to see if we're truly at the end of our buffer or if there
1507 * is another page we need to flip to.
1510 if (argp
->p
== argp
->end
) {
1511 if (argp
->pagelen
< 4) {
1512 /* There isn't an opcode still on the wire */
1513 op
->opnum
= OP_WRITE
+ 1;
1514 op
->status
= nfserr_bad_xdr
;
1520 * False alarm. We just hit a page boundary, but there
1521 * is still data available. Move pointer across page
1522 * boundary. *snip from READ_BUF*
1524 argp
->p
= page_address(argp
->pagelist
[0]);
1526 if (argp
->pagelen
< PAGE_SIZE
) {
1527 argp
->end
= argp
->p
+ (argp
->pagelen
>>2);
1530 argp
->end
= argp
->p
+ (PAGE_SIZE
>>2);
1531 argp
->pagelen
-= PAGE_SIZE
;
1534 op
->opnum
= ntohl(*argp
->p
++);
1536 if (op
->opnum
>= FIRST_NFS4_OP
&& op
->opnum
<= LAST_NFS4_OP
)
1537 op
->status
= ops
->decoders
[op
->opnum
](argp
, &op
->u
);
1539 op
->opnum
= OP_ILLEGAL
;
1540 op
->status
= nfserr_op_illegal
;
1548 * We'll try to cache the result in the DRC if any one
1549 * op in the compound wants to be cached:
1551 cachethis
|= nfsd4_cache_this_op(op
);
1553 /* Sessions make the DRC unnecessary: */
1554 if (argp
->minorversion
)
1556 argp
->rqstp
->rq_cachetype
= cachethis
? RC_REPLBUFF
: RC_NOCACHE
;
1561 #define WRITE32(n) *p++ = htonl(n)
1562 #define WRITE64(n) do { \
1563 *p++ = htonl((u32)((n) >> 32)); \
1564 *p++ = htonl((u32)(n)); \
1566 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1567 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1568 memcpy(p, ptr, nbytes); \
1569 p += XDR_QUADLEN(nbytes); \
1572 static void write32(__be32
**p
, u32 n
)
1577 static void write64(__be32
**p
, u64 n
)
1579 write32(p
, (u32
)(n
>> 32));
1583 static void write_change(__be32
**p
, struct kstat
*stat
, struct inode
*inode
)
1585 if (IS_I_VERSION(inode
)) {
1586 write64(p
, inode
->i_version
);
1588 write32(p
, stat
->ctime
.tv_sec
);
1589 write32(p
, stat
->ctime
.tv_nsec
);
1593 static void write_cinfo(__be32
**p
, struct nfsd4_change_info
*c
)
1595 write32(p
, c
->atomic
);
1596 if (c
->change_supported
) {
1597 write64(p
, c
->before_change
);
1598 write64(p
, c
->after_change
);
1600 write32(p
, c
->before_ctime_sec
);
1601 write32(p
, c
->before_ctime_nsec
);
1602 write32(p
, c
->after_ctime_sec
);
1603 write32(p
, c
->after_ctime_nsec
);
1607 #define RESERVE_SPACE(nbytes) do { \
1609 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1611 #define ADJUST_ARGS() resp->p = p
1614 * Header routine to setup seqid operation replay cache
1616 #define ENCODE_SEQID_OP_HEAD \
1622 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1623 * is where sequence id's are incremented, and the replay cache is filled.
1624 * Note that we increment sequence id's here, at the last moment, so we're sure
1625 * we know whether the error to be returned is a sequence id mutating error.
1628 static void encode_seqid_op_tail(struct nfsd4_compoundres
*resp
, __be32
*save
, __be32 nfserr
)
1630 struct nfs4_stateowner
*stateowner
= resp
->cstate
.replay_owner
;
1632 if (seqid_mutating_err(ntohl(nfserr
)) && stateowner
) {
1633 stateowner
->so_seqid
++;
1634 stateowner
->so_replay
.rp_status
= nfserr
;
1635 stateowner
->so_replay
.rp_buflen
=
1636 (char *)resp
->p
- (char *)save
;
1637 memcpy(stateowner
->so_replay
.rp_buf
, save
,
1638 stateowner
->so_replay
.rp_buflen
);
1642 /* Encode as an array of strings the string given with components
1645 static __be32
nfsd4_encode_components(char sep
, char *components
,
1646 __be32
**pp
, int *buflen
)
1650 int strlen
, count
=0;
1653 dprintk("nfsd4_encode_components(%s)\n", components
);
1654 if ((*buflen
-= 4) < 0)
1655 return nfserr_resource
;
1656 WRITE32(0); /* We will fill this in with @count later */
1657 end
= str
= components
;
1659 for (; *end
&& (*end
!= sep
); end
++)
1660 ; /* Point to end of component */
1663 if ((*buflen
-= ((XDR_QUADLEN(strlen
) << 2) + 4)) < 0)
1664 return nfserr_resource
;
1666 WRITEMEM(str
, strlen
);
1680 * encode a location element of a fs_locations structure
1682 static __be32
nfsd4_encode_fs_location4(struct nfsd4_fs_location
*location
,
1683 __be32
**pp
, int *buflen
)
1688 status
= nfsd4_encode_components(':', location
->hosts
, &p
, buflen
);
1691 status
= nfsd4_encode_components('/', location
->path
, &p
, buflen
);
1699 * Encode a path in RFC3530 'pathname4' format
1701 static __be32
nfsd4_encode_path(const struct path
*root
,
1702 const struct path
*path
, __be32
**pp
, int *buflen
)
1706 .dentry
= path
->dentry
,
1709 struct dentry
**components
= NULL
;
1710 unsigned int ncomponents
= 0;
1711 __be32 err
= nfserr_jukebox
;
1713 dprintk("nfsd4_encode_components(");
1716 /* First walk the path up to the nfsd root, and store the
1717 * dentries/path components in an array.
1720 if (cur
.dentry
== root
->dentry
&& cur
.mnt
== root
->mnt
)
1722 if (cur
.dentry
== cur
.mnt
->mnt_root
) {
1723 if (follow_up(&cur
))
1727 if ((ncomponents
& 15) == 0) {
1728 struct dentry
**new;
1729 new = krealloc(components
,
1730 sizeof(*new) * (ncomponents
+ 16),
1736 components
[ncomponents
++] = cur
.dentry
;
1737 cur
.dentry
= dget_parent(cur
.dentry
);
1743 WRITE32(ncomponents
);
1745 while (ncomponents
) {
1746 struct dentry
*dentry
= components
[ncomponents
- 1];
1747 unsigned int len
= dentry
->d_name
.len
;
1749 *buflen
-= 4 + (XDR_QUADLEN(len
) << 2);
1753 WRITEMEM(dentry
->d_name
.name
, len
);
1754 dprintk("/%s", dentry
->d_name
.name
);
1764 dput(components
[--ncomponents
]);
1770 static __be32
nfsd4_encode_fsloc_fsroot(struct svc_rqst
*rqstp
,
1771 const struct path
*path
, __be32
**pp
, int *buflen
)
1773 struct svc_export
*exp_ps
;
1776 exp_ps
= rqst_find_fsidzero_export(rqstp
);
1778 return nfserrno(PTR_ERR(exp_ps
));
1779 res
= nfsd4_encode_path(&exp_ps
->ex_path
, path
, pp
, buflen
);
1785 * encode a fs_locations structure
1787 static __be32
nfsd4_encode_fs_locations(struct svc_rqst
*rqstp
,
1788 struct svc_export
*exp
,
1789 __be32
**pp
, int *buflen
)
1794 struct nfsd4_fs_locations
*fslocs
= &exp
->ex_fslocs
;
1796 status
= nfsd4_encode_fsloc_fsroot(rqstp
, &exp
->ex_path
, &p
, buflen
);
1799 if ((*buflen
-= 4) < 0)
1800 return nfserr_resource
;
1801 WRITE32(fslocs
->locations_count
);
1802 for (i
=0; i
<fslocs
->locations_count
; i
++) {
1803 status
= nfsd4_encode_fs_location4(&fslocs
->locations
[i
],
1812 static u32
nfs4_file_type(umode_t mode
)
1814 switch (mode
& S_IFMT
) {
1815 case S_IFIFO
: return NF4FIFO
;
1816 case S_IFCHR
: return NF4CHR
;
1817 case S_IFDIR
: return NF4DIR
;
1818 case S_IFBLK
: return NF4BLK
;
1819 case S_IFLNK
: return NF4LNK
;
1820 case S_IFREG
: return NF4REG
;
1821 case S_IFSOCK
: return NF4SOCK
;
1822 default: return NF4BAD
;
1827 nfsd4_encode_name(struct svc_rqst
*rqstp
, int whotype
, uid_t id
, int group
,
1828 __be32
**p
, int *buflen
)
1832 if (*buflen
< (XDR_QUADLEN(IDMAP_NAMESZ
) << 2) + 4)
1833 return nfserr_resource
;
1834 if (whotype
!= NFS4_ACL_WHO_NAMED
)
1835 status
= nfs4_acl_write_who(whotype
, (u8
*)(*p
+ 1));
1837 status
= nfsd_map_gid_to_name(rqstp
, id
, (u8
*)(*p
+ 1));
1839 status
= nfsd_map_uid_to_name(rqstp
, id
, (u8
*)(*p
+ 1));
1841 return nfserrno(status
);
1842 *p
= xdr_encode_opaque(*p
, NULL
, status
);
1843 *buflen
-= (XDR_QUADLEN(status
) << 2) + 4;
1844 BUG_ON(*buflen
< 0);
1848 static inline __be32
1849 nfsd4_encode_user(struct svc_rqst
*rqstp
, uid_t uid
, __be32
**p
, int *buflen
)
1851 return nfsd4_encode_name(rqstp
, NFS4_ACL_WHO_NAMED
, uid
, 0, p
, buflen
);
1854 static inline __be32
1855 nfsd4_encode_group(struct svc_rqst
*rqstp
, uid_t gid
, __be32
**p
, int *buflen
)
1857 return nfsd4_encode_name(rqstp
, NFS4_ACL_WHO_NAMED
, gid
, 1, p
, buflen
);
1860 static inline __be32
1861 nfsd4_encode_aclname(struct svc_rqst
*rqstp
, int whotype
, uid_t id
, int group
,
1862 __be32
**p
, int *buflen
)
1864 return nfsd4_encode_name(rqstp
, whotype
, id
, group
, p
, buflen
);
1867 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1868 FATTR4_WORD0_RDATTR_ERROR)
1869 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1871 static __be32
fattr_handle_absent_fs(u32
*bmval0
, u32
*bmval1
, u32
*rdattr_err
)
1873 /* As per referral draft: */
1874 if (*bmval0
& ~WORD0_ABSENT_FS_ATTRS
||
1875 *bmval1
& ~WORD1_ABSENT_FS_ATTRS
) {
1876 if (*bmval0
& FATTR4_WORD0_RDATTR_ERROR
||
1877 *bmval0
& FATTR4_WORD0_FS_LOCATIONS
)
1878 *rdattr_err
= NFSERR_MOVED
;
1880 return nfserr_moved
;
1882 *bmval0
&= WORD0_ABSENT_FS_ATTRS
;
1883 *bmval1
&= WORD1_ABSENT_FS_ATTRS
;
1888 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1891 * @countp is the buffer size in _words_; upon successful return this becomes
1892 * replaced with the number of words written.
1895 nfsd4_encode_fattr(struct svc_fh
*fhp
, struct svc_export
*exp
,
1896 struct dentry
*dentry
, __be32
*buffer
, int *countp
, u32
*bmval
,
1897 struct svc_rqst
*rqstp
, int ignore_crossmnt
)
1899 u32 bmval0
= bmval
[0];
1900 u32 bmval1
= bmval
[1];
1901 u32 bmval2
= bmval
[2];
1903 struct svc_fh tempfh
;
1904 struct kstatfs statfs
;
1905 int buflen
= *countp
<< 2;
1914 struct nfs4_acl
*acl
= NULL
;
1915 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1916 u32 minorversion
= resp
->cstate
.minorversion
;
1917 struct path path
= {
1918 .mnt
= exp
->ex_path
.mnt
,
1922 BUG_ON(bmval1
& NFSD_WRITEONLY_ATTRS_WORD1
);
1923 BUG_ON(bmval0
& ~nfsd_suppattrs0(minorversion
));
1924 BUG_ON(bmval1
& ~nfsd_suppattrs1(minorversion
));
1925 BUG_ON(bmval2
& ~nfsd_suppattrs2(minorversion
));
1927 if (exp
->ex_fslocs
.migrated
) {
1929 status
= fattr_handle_absent_fs(&bmval0
, &bmval1
, &rdattr_err
);
1934 err
= vfs_getattr(exp
->ex_path
.mnt
, dentry
, &stat
);
1937 if ((bmval0
& (FATTR4_WORD0_FILES_FREE
| FATTR4_WORD0_FILES_TOTAL
|
1938 FATTR4_WORD0_MAXNAME
)) ||
1939 (bmval1
& (FATTR4_WORD1_SPACE_AVAIL
| FATTR4_WORD1_SPACE_FREE
|
1940 FATTR4_WORD1_SPACE_TOTAL
))) {
1941 err
= vfs_statfs(&path
, &statfs
);
1945 if ((bmval0
& (FATTR4_WORD0_FILEHANDLE
| FATTR4_WORD0_FSID
)) && !fhp
) {
1946 fh_init(&tempfh
, NFS4_FHSIZE
);
1947 status
= fh_compose(&tempfh
, exp
, dentry
, NULL
);
1952 if (bmval0
& (FATTR4_WORD0_ACL
| FATTR4_WORD0_ACLSUPPORT
1953 | FATTR4_WORD0_SUPPORTED_ATTRS
)) {
1954 err
= nfsd4_get_nfs4_acl(rqstp
, dentry
, &acl
);
1955 aclsupport
= (err
== 0);
1956 if (bmval0
& FATTR4_WORD0_ACL
) {
1957 if (err
== -EOPNOTSUPP
)
1958 bmval0
&= ~FATTR4_WORD0_ACL
;
1959 else if (err
== -EINVAL
) {
1960 status
= nfserr_attrnotsupp
;
1962 } else if (err
!= 0)
1968 if ((buflen
-= 16) < 0)
1974 } else if (bmval1
) {
1975 if ((buflen
-= 12) < 0)
1981 if ((buflen
-= 8) < 0)
1986 attrlenp
= p
++; /* to be backfilled later */
1988 if (bmval0
& FATTR4_WORD0_SUPPORTED_ATTRS
) {
1989 u32 word0
= nfsd_suppattrs0(minorversion
);
1990 u32 word1
= nfsd_suppattrs1(minorversion
);
1991 u32 word2
= nfsd_suppattrs2(minorversion
);
1994 word0
&= ~FATTR4_WORD0_ACL
;
1996 if ((buflen
-= 12) < 0)
2002 if ((buflen
-= 16) < 0)
2010 if (bmval0
& FATTR4_WORD0_TYPE
) {
2011 if ((buflen
-= 4) < 0)
2013 dummy
= nfs4_file_type(stat
.mode
);
2014 if (dummy
== NF4BAD
)
2015 goto out_serverfault
;
2018 if (bmval0
& FATTR4_WORD0_FH_EXPIRE_TYPE
) {
2019 if ((buflen
-= 4) < 0)
2021 if (exp
->ex_flags
& NFSEXP_NOSUBTREECHECK
)
2022 WRITE32(NFS4_FH_PERSISTENT
);
2024 WRITE32(NFS4_FH_PERSISTENT
|NFS4_FH_VOL_RENAME
);
2026 if (bmval0
& FATTR4_WORD0_CHANGE
) {
2027 if ((buflen
-= 8) < 0)
2029 write_change(&p
, &stat
, dentry
->d_inode
);
2031 if (bmval0
& FATTR4_WORD0_SIZE
) {
2032 if ((buflen
-= 8) < 0)
2036 if (bmval0
& FATTR4_WORD0_LINK_SUPPORT
) {
2037 if ((buflen
-= 4) < 0)
2041 if (bmval0
& FATTR4_WORD0_SYMLINK_SUPPORT
) {
2042 if ((buflen
-= 4) < 0)
2046 if (bmval0
& FATTR4_WORD0_NAMED_ATTR
) {
2047 if ((buflen
-= 4) < 0)
2051 if (bmval0
& FATTR4_WORD0_FSID
) {
2052 if ((buflen
-= 16) < 0)
2054 if (exp
->ex_fslocs
.migrated
) {
2055 WRITE64(NFS4_REFERRAL_FSID_MAJOR
);
2056 WRITE64(NFS4_REFERRAL_FSID_MINOR
);
2057 } else switch(fsid_source(fhp
)) {
2058 case FSIDSOURCE_FSID
:
2059 WRITE64((u64
)exp
->ex_fsid
);
2062 case FSIDSOURCE_DEV
:
2064 WRITE32(MAJOR(stat
.dev
));
2066 WRITE32(MINOR(stat
.dev
));
2068 case FSIDSOURCE_UUID
:
2069 WRITEMEM(exp
->ex_uuid
, 16);
2073 if (bmval0
& FATTR4_WORD0_UNIQUE_HANDLES
) {
2074 if ((buflen
-= 4) < 0)
2078 if (bmval0
& FATTR4_WORD0_LEASE_TIME
) {
2079 if ((buflen
-= 4) < 0)
2081 WRITE32(nfsd4_lease
);
2083 if (bmval0
& FATTR4_WORD0_RDATTR_ERROR
) {
2084 if ((buflen
-= 4) < 0)
2086 WRITE32(rdattr_err
);
2088 if (bmval0
& FATTR4_WORD0_ACL
) {
2089 struct nfs4_ace
*ace
;
2092 if ((buflen
-= 4) < 0)
2098 if ((buflen
-= 4) < 0)
2100 WRITE32(acl
->naces
);
2102 for (ace
= acl
->aces
; ace
< acl
->aces
+ acl
->naces
; ace
++) {
2103 if ((buflen
-= 4*3) < 0)
2107 WRITE32(ace
->access_mask
& NFS4_ACE_MASK_ALL
);
2108 status
= nfsd4_encode_aclname(rqstp
, ace
->whotype
,
2109 ace
->who
, ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
,
2111 if (status
== nfserr_resource
)
2118 if (bmval0
& FATTR4_WORD0_ACLSUPPORT
) {
2119 if ((buflen
-= 4) < 0)
2121 WRITE32(aclsupport
?
2122 ACL4_SUPPORT_ALLOW_ACL
|ACL4_SUPPORT_DENY_ACL
: 0);
2124 if (bmval0
& FATTR4_WORD0_CANSETTIME
) {
2125 if ((buflen
-= 4) < 0)
2129 if (bmval0
& FATTR4_WORD0_CASE_INSENSITIVE
) {
2130 if ((buflen
-= 4) < 0)
2134 if (bmval0
& FATTR4_WORD0_CASE_PRESERVING
) {
2135 if ((buflen
-= 4) < 0)
2139 if (bmval0
& FATTR4_WORD0_CHOWN_RESTRICTED
) {
2140 if ((buflen
-= 4) < 0)
2144 if (bmval0
& FATTR4_WORD0_FILEHANDLE
) {
2145 buflen
-= (XDR_QUADLEN(fhp
->fh_handle
.fh_size
) << 2) + 4;
2148 WRITE32(fhp
->fh_handle
.fh_size
);
2149 WRITEMEM(&fhp
->fh_handle
.fh_base
, fhp
->fh_handle
.fh_size
);
2151 if (bmval0
& FATTR4_WORD0_FILEID
) {
2152 if ((buflen
-= 8) < 0)
2156 if (bmval0
& FATTR4_WORD0_FILES_AVAIL
) {
2157 if ((buflen
-= 8) < 0)
2159 WRITE64((u64
) statfs
.f_ffree
);
2161 if (bmval0
& FATTR4_WORD0_FILES_FREE
) {
2162 if ((buflen
-= 8) < 0)
2164 WRITE64((u64
) statfs
.f_ffree
);
2166 if (bmval0
& FATTR4_WORD0_FILES_TOTAL
) {
2167 if ((buflen
-= 8) < 0)
2169 WRITE64((u64
) statfs
.f_files
);
2171 if (bmval0
& FATTR4_WORD0_FS_LOCATIONS
) {
2172 status
= nfsd4_encode_fs_locations(rqstp
, exp
, &p
, &buflen
);
2173 if (status
== nfserr_resource
)
2178 if (bmval0
& FATTR4_WORD0_HOMOGENEOUS
) {
2179 if ((buflen
-= 4) < 0)
2183 if (bmval0
& FATTR4_WORD0_MAXFILESIZE
) {
2184 if ((buflen
-= 8) < 0)
2188 if (bmval0
& FATTR4_WORD0_MAXLINK
) {
2189 if ((buflen
-= 4) < 0)
2193 if (bmval0
& FATTR4_WORD0_MAXNAME
) {
2194 if ((buflen
-= 4) < 0)
2196 WRITE32(statfs
.f_namelen
);
2198 if (bmval0
& FATTR4_WORD0_MAXREAD
) {
2199 if ((buflen
-= 8) < 0)
2201 WRITE64((u64
) svc_max_payload(rqstp
));
2203 if (bmval0
& FATTR4_WORD0_MAXWRITE
) {
2204 if ((buflen
-= 8) < 0)
2206 WRITE64((u64
) svc_max_payload(rqstp
));
2208 if (bmval1
& FATTR4_WORD1_MODE
) {
2209 if ((buflen
-= 4) < 0)
2211 WRITE32(stat
.mode
& S_IALLUGO
);
2213 if (bmval1
& FATTR4_WORD1_NO_TRUNC
) {
2214 if ((buflen
-= 4) < 0)
2218 if (bmval1
& FATTR4_WORD1_NUMLINKS
) {
2219 if ((buflen
-= 4) < 0)
2221 WRITE32(stat
.nlink
);
2223 if (bmval1
& FATTR4_WORD1_OWNER
) {
2224 status
= nfsd4_encode_user(rqstp
, stat
.uid
, &p
, &buflen
);
2225 if (status
== nfserr_resource
)
2230 if (bmval1
& FATTR4_WORD1_OWNER_GROUP
) {
2231 status
= nfsd4_encode_group(rqstp
, stat
.gid
, &p
, &buflen
);
2232 if (status
== nfserr_resource
)
2237 if (bmval1
& FATTR4_WORD1_RAWDEV
) {
2238 if ((buflen
-= 8) < 0)
2240 WRITE32((u32
) MAJOR(stat
.rdev
));
2241 WRITE32((u32
) MINOR(stat
.rdev
));
2243 if (bmval1
& FATTR4_WORD1_SPACE_AVAIL
) {
2244 if ((buflen
-= 8) < 0)
2246 dummy64
= (u64
)statfs
.f_bavail
* (u64
)statfs
.f_bsize
;
2249 if (bmval1
& FATTR4_WORD1_SPACE_FREE
) {
2250 if ((buflen
-= 8) < 0)
2252 dummy64
= (u64
)statfs
.f_bfree
* (u64
)statfs
.f_bsize
;
2255 if (bmval1
& FATTR4_WORD1_SPACE_TOTAL
) {
2256 if ((buflen
-= 8) < 0)
2258 dummy64
= (u64
)statfs
.f_blocks
* (u64
)statfs
.f_bsize
;
2261 if (bmval1
& FATTR4_WORD1_SPACE_USED
) {
2262 if ((buflen
-= 8) < 0)
2264 dummy64
= (u64
)stat
.blocks
<< 9;
2267 if (bmval1
& FATTR4_WORD1_TIME_ACCESS
) {
2268 if ((buflen
-= 12) < 0)
2271 WRITE32(stat
.atime
.tv_sec
);
2272 WRITE32(stat
.atime
.tv_nsec
);
2274 if (bmval1
& FATTR4_WORD1_TIME_DELTA
) {
2275 if ((buflen
-= 12) < 0)
2281 if (bmval1
& FATTR4_WORD1_TIME_METADATA
) {
2282 if ((buflen
-= 12) < 0)
2285 WRITE32(stat
.ctime
.tv_sec
);
2286 WRITE32(stat
.ctime
.tv_nsec
);
2288 if (bmval1
& FATTR4_WORD1_TIME_MODIFY
) {
2289 if ((buflen
-= 12) < 0)
2292 WRITE32(stat
.mtime
.tv_sec
);
2293 WRITE32(stat
.mtime
.tv_nsec
);
2295 if (bmval1
& FATTR4_WORD1_MOUNTED_ON_FILEID
) {
2296 if ((buflen
-= 8) < 0)
2299 * Get parent's attributes if not ignoring crossmount
2300 * and this is the root of a cross-mounted filesystem.
2302 if (ignore_crossmnt
== 0 &&
2303 dentry
== exp
->ex_path
.mnt
->mnt_root
) {
2304 struct path path
= exp
->ex_path
;
2306 while (follow_up(&path
)) {
2307 if (path
.dentry
!= path
.mnt
->mnt_root
)
2310 err
= vfs_getattr(path
.mnt
, path
.dentry
, &stat
);
2317 if (bmval2
& FATTR4_WORD2_SUPPATTR_EXCLCREAT
) {
2319 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0
);
2320 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1
);
2321 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2
);
2324 *attrlenp
= htonl((char *)p
- (char *)attrlenp
- 4);
2325 *countp
= p
- buffer
;
2334 status
= nfserrno(err
);
2338 status
= nfserr_resource
;
2341 status
= nfserr_serverfault
;
2345 static inline int attributes_need_mount(u32
*bmval
)
2347 if (bmval
[0] & ~(FATTR4_WORD0_RDATTR_ERROR
| FATTR4_WORD0_LEASE_TIME
))
2349 if (bmval
[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID
)
2355 nfsd4_encode_dirent_fattr(struct nfsd4_readdir
*cd
,
2356 const char *name
, int namlen
, __be32
*p
, int *buflen
)
2358 struct svc_export
*exp
= cd
->rd_fhp
->fh_export
;
2359 struct dentry
*dentry
;
2361 int ignore_crossmnt
= 0;
2363 dentry
= lookup_one_len(name
, cd
->rd_fhp
->fh_dentry
, namlen
);
2365 return nfserrno(PTR_ERR(dentry
));
2366 if (!dentry
->d_inode
) {
2368 * nfsd_buffered_readdir drops the i_mutex between
2369 * readdir and calling this callback, leaving a window
2370 * where this directory entry could have gone away.
2373 return nfserr_noent
;
2378 * In the case of a mountpoint, the client may be asking for
2379 * attributes that are only properties of the underlying filesystem
2380 * as opposed to the cross-mounted file system. In such a case,
2381 * we will not follow the cross mount and will fill the attribtutes
2382 * directly from the mountpoint dentry.
2384 if (nfsd_mountpoint(dentry
, exp
)) {
2387 if (!(exp
->ex_flags
& NFSEXP_V4ROOT
)
2388 && !attributes_need_mount(cd
->rd_bmval
)) {
2389 ignore_crossmnt
= 1;
2393 * Why the heck aren't we just using nfsd_lookup??
2394 * Different "."/".." handling? Something else?
2395 * At least, add a comment here to explain....
2397 err
= nfsd_cross_mnt(cd
->rd_rqstp
, &dentry
, &exp
);
2399 nfserr
= nfserrno(err
);
2402 nfserr
= check_nfsd_access(exp
, cd
->rd_rqstp
);
2408 nfserr
= nfsd4_encode_fattr(NULL
, exp
, dentry
, p
, buflen
, cd
->rd_bmval
,
2409 cd
->rd_rqstp
, ignore_crossmnt
);
2417 nfsd4_encode_rdattr_error(__be32
*p
, int buflen
, __be32 nfserr
)
2424 *p
++ = htonl(FATTR4_WORD0_RDATTR_ERROR
); /* bmval0 */
2425 *p
++ = htonl(0); /* bmval1 */
2428 *p
++ = nfserr
; /* no htonl */
2429 *attrlenp
= htonl((char *)p
- (char *)attrlenp
- 4);
2434 nfsd4_encode_dirent(void *ccdv
, const char *name
, int namlen
,
2435 loff_t offset
, u64 ino
, unsigned int d_type
)
2437 struct readdir_cd
*ccd
= ccdv
;
2438 struct nfsd4_readdir
*cd
= container_of(ccd
, struct nfsd4_readdir
, common
);
2440 __be32
*p
= cd
->buffer
;
2442 __be32 nfserr
= nfserr_toosmall
;
2444 /* In nfsv4, "." and ".." never make it onto the wire.. */
2445 if (name
&& isdotent(name
, namlen
)) {
2446 cd
->common
.err
= nfs_ok
;
2451 xdr_encode_hyper(cd
->offset
, (u64
) offset
);
2453 buflen
= cd
->buflen
- 4 - XDR_QUADLEN(namlen
);
2457 *p
++ = xdr_one
; /* mark entry present */
2459 p
= xdr_encode_hyper(p
, NFS_OFFSET_MAX
); /* offset of next entry */
2460 p
= xdr_encode_array(p
, name
, namlen
); /* name length & name */
2462 nfserr
= nfsd4_encode_dirent_fattr(cd
, name
, namlen
, p
, &buflen
);
2467 case nfserr_resource
:
2468 nfserr
= nfserr_toosmall
;
2474 * If the client requested the RDATTR_ERROR attribute,
2475 * we stuff the error code into this attribute
2476 * and continue. If this attribute was not requested,
2477 * then in accordance with the spec, we fail the
2478 * entire READDIR operation(!)
2480 if (!(cd
->rd_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
))
2482 p
= nfsd4_encode_rdattr_error(p
, buflen
, nfserr
);
2484 nfserr
= nfserr_toosmall
;
2488 cd
->buflen
-= (p
- cd
->buffer
);
2490 cd
->offset
= cookiep
;
2492 cd
->common
.err
= nfs_ok
;
2495 cd
->common
.err
= nfserr
;
2500 nfsd4_encode_stateid(struct nfsd4_compoundres
*resp
, stateid_t
*sid
)
2504 RESERVE_SPACE(sizeof(stateid_t
));
2505 WRITE32(sid
->si_generation
);
2506 WRITEMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
2511 nfsd4_encode_access(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_access
*access
)
2517 WRITE32(access
->ac_supported
);
2518 WRITE32(access
->ac_resp_access
);
2524 static __be32
nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_bind_conn_to_session
*bcts
)
2529 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN
+ 8);
2530 WRITEMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
2540 nfsd4_encode_close(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_close
*close
)
2542 ENCODE_SEQID_OP_HEAD
;
2545 nfsd4_encode_stateid(resp
, &close
->cl_stateid
);
2547 encode_seqid_op_tail(resp
, save
, nfserr
);
2553 nfsd4_encode_commit(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_commit
*commit
)
2559 WRITEMEM(commit
->co_verf
.data
, 8);
2566 nfsd4_encode_create(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_create
*create
)
2572 write_cinfo(&p
, &create
->cr_cinfo
);
2574 WRITE32(create
->cr_bmval
[0]);
2575 WRITE32(create
->cr_bmval
[1]);
2582 nfsd4_encode_getattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_getattr
*getattr
)
2584 struct svc_fh
*fhp
= getattr
->ga_fhp
;
2590 buflen
= resp
->end
- resp
->p
- (COMPOUND_ERR_SLACK_SPACE
>> 2);
2591 nfserr
= nfsd4_encode_fattr(fhp
, fhp
->fh_export
, fhp
->fh_dentry
,
2592 resp
->p
, &buflen
, getattr
->ga_bmval
,
2600 nfsd4_encode_getfh(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct svc_fh
**fhpp
)
2602 struct svc_fh
*fhp
= *fhpp
;
2607 len
= fhp
->fh_handle
.fh_size
;
2608 RESERVE_SPACE(len
+ 4);
2610 WRITEMEM(&fhp
->fh_handle
.fh_base
, len
);
2617 * Including all fields other than the name, a LOCK4denied structure requires
2618 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2621 nfsd4_encode_lock_denied(struct nfsd4_compoundres
*resp
, struct nfsd4_lock_denied
*ld
)
2623 struct xdr_netobj
*conf
= &ld
->ld_owner
;
2626 RESERVE_SPACE(32 + XDR_LEN(conf
->len
));
2627 WRITE64(ld
->ld_start
);
2628 WRITE64(ld
->ld_length
);
2629 WRITE32(ld
->ld_type
);
2631 WRITEMEM(&ld
->ld_clientid
, 8);
2633 WRITEMEM(conf
->data
, conf
->len
);
2635 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2636 WRITE64((u64
)0); /* clientid */
2637 WRITE32(0); /* length of owner name */
2643 nfsd4_encode_lock(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lock
*lock
)
2645 ENCODE_SEQID_OP_HEAD
;
2648 nfsd4_encode_stateid(resp
, &lock
->lk_resp_stateid
);
2649 else if (nfserr
== nfserr_denied
)
2650 nfsd4_encode_lock_denied(resp
, &lock
->lk_denied
);
2652 encode_seqid_op_tail(resp
, save
, nfserr
);
2657 nfsd4_encode_lockt(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lockt
*lockt
)
2659 if (nfserr
== nfserr_denied
)
2660 nfsd4_encode_lock_denied(resp
, &lockt
->lt_denied
);
2665 nfsd4_encode_locku(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_locku
*locku
)
2667 ENCODE_SEQID_OP_HEAD
;
2670 nfsd4_encode_stateid(resp
, &locku
->lu_stateid
);
2672 encode_seqid_op_tail(resp
, save
, nfserr
);
2678 nfsd4_encode_link(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_link
*link
)
2684 write_cinfo(&p
, &link
->li_cinfo
);
2692 nfsd4_encode_open(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open
*open
)
2695 ENCODE_SEQID_OP_HEAD
;
2700 nfsd4_encode_stateid(resp
, &open
->op_stateid
);
2702 write_cinfo(&p
, &open
->op_cinfo
);
2703 WRITE32(open
->op_rflags
);
2705 WRITE32(open
->op_bmval
[0]);
2706 WRITE32(open
->op_bmval
[1]);
2707 WRITE32(open
->op_delegate_type
);
2710 switch (open
->op_delegate_type
) {
2711 case NFS4_OPEN_DELEGATE_NONE
:
2713 case NFS4_OPEN_DELEGATE_READ
:
2714 nfsd4_encode_stateid(resp
, &open
->op_delegate_stateid
);
2716 WRITE32(open
->op_recall
);
2719 * TODO: ACE's in delegations
2721 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
2724 WRITE32(0); /* XXX: is NULL principal ok? */
2727 case NFS4_OPEN_DELEGATE_WRITE
:
2728 nfsd4_encode_stateid(resp
, &open
->op_delegate_stateid
);
2733 * TODO: space_limit's in delegations
2735 WRITE32(NFS4_LIMIT_SIZE
);
2740 * TODO: ACE's in delegations
2742 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
2745 WRITE32(0); /* XXX: is NULL principal ok? */
2751 /* XXX save filehandle here */
2753 encode_seqid_op_tail(resp
, save
, nfserr
);
2758 nfsd4_encode_open_confirm(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_confirm
*oc
)
2760 ENCODE_SEQID_OP_HEAD
;
2763 nfsd4_encode_stateid(resp
, &oc
->oc_resp_stateid
);
2765 encode_seqid_op_tail(resp
, save
, nfserr
);
2770 nfsd4_encode_open_downgrade(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_downgrade
*od
)
2772 ENCODE_SEQID_OP_HEAD
;
2775 nfsd4_encode_stateid(resp
, &od
->od_stateid
);
2777 encode_seqid_op_tail(resp
, save
, nfserr
);
2782 nfsd4_encode_read(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
2783 struct nfsd4_read
*read
)
2787 unsigned long maxcount
;
2793 if (resp
->xbuf
->page_len
)
2794 return nfserr_resource
;
2796 RESERVE_SPACE(8); /* eof flag and byte count */
2798 maxcount
= svc_max_payload(resp
->rqstp
);
2799 if (maxcount
> read
->rd_length
)
2800 maxcount
= read
->rd_length
;
2805 pn
= resp
->rqstp
->rq_resused
++;
2806 resp
->rqstp
->rq_vec
[v
].iov_base
=
2807 page_address(resp
->rqstp
->rq_respages
[pn
]);
2808 resp
->rqstp
->rq_vec
[v
].iov_len
=
2809 len
< PAGE_SIZE
? len
: PAGE_SIZE
;
2815 nfserr
= nfsd_read_file(read
->rd_rqstp
, read
->rd_fhp
, read
->rd_filp
,
2816 read
->rd_offset
, resp
->rqstp
->rq_vec
, read
->rd_vlen
,
2821 eof
= (read
->rd_offset
+ maxcount
>=
2822 read
->rd_fhp
->fh_dentry
->d_inode
->i_size
);
2827 resp
->xbuf
->head
[0].iov_len
= (char*)p
2828 - (char*)resp
->xbuf
->head
[0].iov_base
;
2829 resp
->xbuf
->page_len
= maxcount
;
2831 /* Use rest of head for padding and remaining ops: */
2832 resp
->xbuf
->tail
[0].iov_base
= p
;
2833 resp
->xbuf
->tail
[0].iov_len
= 0;
2837 resp
->xbuf
->tail
[0].iov_base
+= maxcount
&3;
2838 resp
->xbuf
->tail
[0].iov_len
= 4 - (maxcount
&3);
2845 nfsd4_encode_readlink(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readlink
*readlink
)
2853 if (resp
->xbuf
->page_len
)
2854 return nfserr_resource
;
2856 page
= page_address(resp
->rqstp
->rq_respages
[resp
->rqstp
->rq_resused
++]);
2858 maxcount
= PAGE_SIZE
;
2862 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2863 * if they would overflow the buffer. Is this kosher in NFSv4? If
2864 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2865 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2867 nfserr
= nfsd_readlink(readlink
->rl_rqstp
, readlink
->rl_fhp
, page
, &maxcount
);
2868 if (nfserr
== nfserr_isdir
)
2869 return nfserr_inval
;
2875 resp
->xbuf
->head
[0].iov_len
= (char*)p
2876 - (char*)resp
->xbuf
->head
[0].iov_base
;
2877 resp
->xbuf
->page_len
= maxcount
;
2879 /* Use rest of head for padding and remaining ops: */
2880 resp
->xbuf
->tail
[0].iov_base
= p
;
2881 resp
->xbuf
->tail
[0].iov_len
= 0;
2885 resp
->xbuf
->tail
[0].iov_base
+= maxcount
&3;
2886 resp
->xbuf
->tail
[0].iov_len
= 4 - (maxcount
&3);
2893 nfsd4_encode_readdir(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readdir
*readdir
)
2897 __be32
*page
, *savep
, *tailbase
;
2902 if (resp
->xbuf
->page_len
)
2903 return nfserr_resource
;
2905 RESERVE_SPACE(8); /* verifier */
2908 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2912 resp
->xbuf
->head
[0].iov_len
= ((char*)resp
->p
) - (char*)resp
->xbuf
->head
[0].iov_base
;
2915 maxcount
= PAGE_SIZE
;
2916 if (maxcount
> readdir
->rd_maxcount
)
2917 maxcount
= readdir
->rd_maxcount
;
2920 * Convert from bytes to words, account for the two words already
2921 * written, make sure to leave two words at the end for the next
2922 * pointer and eof field.
2924 maxcount
= (maxcount
>> 2) - 4;
2926 nfserr
= nfserr_toosmall
;
2930 page
= page_address(resp
->rqstp
->rq_respages
[resp
->rqstp
->rq_resused
++]);
2931 readdir
->common
.err
= 0;
2932 readdir
->buflen
= maxcount
;
2933 readdir
->buffer
= page
;
2934 readdir
->offset
= NULL
;
2936 offset
= readdir
->rd_cookie
;
2937 nfserr
= nfsd_readdir(readdir
->rd_rqstp
, readdir
->rd_fhp
,
2939 &readdir
->common
, nfsd4_encode_dirent
);
2940 if (nfserr
== nfs_ok
&&
2941 readdir
->common
.err
== nfserr_toosmall
&&
2942 readdir
->buffer
== page
)
2943 nfserr
= nfserr_toosmall
;
2947 if (readdir
->offset
)
2948 xdr_encode_hyper(readdir
->offset
, offset
);
2950 p
= readdir
->buffer
;
2951 *p
++ = 0; /* no more entries */
2952 *p
++ = htonl(readdir
->common
.err
== nfserr_eof
);
2953 resp
->xbuf
->page_len
= ((char*)p
) - (char*)page_address(
2954 resp
->rqstp
->rq_respages
[resp
->rqstp
->rq_resused
-1]);
2956 /* Use rest of head for padding and remaining ops: */
2957 resp
->xbuf
->tail
[0].iov_base
= tailbase
;
2958 resp
->xbuf
->tail
[0].iov_len
= 0;
2959 resp
->p
= resp
->xbuf
->tail
[0].iov_base
;
2960 resp
->end
= resp
->p
+ (PAGE_SIZE
- resp
->xbuf
->head
[0].iov_len
)/4;
2970 nfsd4_encode_remove(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_remove
*remove
)
2976 write_cinfo(&p
, &remove
->rm_cinfo
);
2983 nfsd4_encode_rename(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_rename
*rename
)
2989 write_cinfo(&p
, &rename
->rn_sinfo
);
2990 write_cinfo(&p
, &rename
->rn_tinfo
);
2997 nfsd4_do_encode_secinfo(struct nfsd4_compoundres
*resp
,
2998 __be32 nfserr
,struct svc_export
*exp
)
3002 struct exp_flavor_info
*flavs
;
3003 struct exp_flavor_info def_flavs
[2];
3008 if (exp
->ex_nflavors
) {
3009 flavs
= exp
->ex_flavors
;
3010 nflavs
= exp
->ex_nflavors
;
3011 } else { /* Handling of some defaults in absence of real secinfo: */
3013 if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_UNIX
) {
3015 flavs
[0].pseudoflavor
= RPC_AUTH_UNIX
;
3016 flavs
[1].pseudoflavor
= RPC_AUTH_NULL
;
3017 } else if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_GSS
) {
3019 flavs
[0].pseudoflavor
3020 = svcauth_gss_flavor(exp
->ex_client
);
3023 flavs
[0].pseudoflavor
3024 = exp
->ex_client
->flavour
->flavour
;
3031 for (i
= 0; i
< nflavs
; i
++) {
3032 u32 flav
= flavs
[i
].pseudoflavor
;
3033 struct gss_api_mech
*gm
= gss_mech_get_by_pseudoflavor(flav
);
3037 WRITE32(RPC_AUTH_GSS
);
3039 RESERVE_SPACE(4 + gm
->gm_oid
.len
);
3040 WRITE32(gm
->gm_oid
.len
);
3041 WRITEMEM(gm
->gm_oid
.data
, gm
->gm_oid
.len
);
3044 WRITE32(0); /* qop */
3047 WRITE32(gss_pseudoflavor_to_service(gm
, flav
));
3063 nfsd4_encode_secinfo(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3064 struct nfsd4_secinfo
*secinfo
)
3066 return nfsd4_do_encode_secinfo(resp
, nfserr
, secinfo
->si_exp
);
3070 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3071 struct nfsd4_secinfo_no_name
*secinfo
)
3073 return nfsd4_do_encode_secinfo(resp
, nfserr
, secinfo
->sin_exp
);
3077 * The SETATTR encode routine is special -- it always encodes a bitmap,
3078 * regardless of the error status.
3081 nfsd4_encode_setattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setattr
*setattr
)
3093 WRITE32(setattr
->sa_bmval
[0]);
3094 WRITE32(setattr
->sa_bmval
[1]);
3101 nfsd4_encode_setclientid(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setclientid
*scd
)
3106 RESERVE_SPACE(8 + sizeof(nfs4_verifier
));
3107 WRITEMEM(&scd
->se_clientid
, 8);
3108 WRITEMEM(&scd
->se_confirm
, sizeof(nfs4_verifier
));
3111 else if (nfserr
== nfserr_clid_inuse
) {
3121 nfsd4_encode_write(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_write
*write
)
3127 WRITE32(write
->wr_bytes_written
);
3128 WRITE32(write
->wr_how_written
);
3129 WRITEMEM(write
->wr_verifier
.data
, 8);
3136 nfsd4_encode_exchange_id(struct nfsd4_compoundres
*resp
, int nfserr
,
3137 struct nfsd4_exchange_id
*exid
)
3143 int server_scope_sz
;
3144 uint64_t minor_id
= 0;
3149 major_id
= utsname()->nodename
;
3150 major_id_sz
= strlen(major_id
);
3151 server_scope
= utsname()->nodename
;
3152 server_scope_sz
= strlen(server_scope
);
3155 8 /* eir_clientid */ +
3156 4 /* eir_sequenceid */ +
3158 4 /* spr_how (SP4_NONE) */ +
3159 8 /* so_minor_id */ +
3160 4 /* so_major_id.len */ +
3161 (XDR_QUADLEN(major_id_sz
) * 4) +
3162 4 /* eir_server_scope.len */ +
3163 (XDR_QUADLEN(server_scope_sz
) * 4) +
3164 4 /* eir_server_impl_id.count (0) */);
3166 WRITEMEM(&exid
->clientid
, 8);
3167 WRITE32(exid
->seqid
);
3168 WRITE32(exid
->flags
);
3170 /* state_protect4_r. Currently only support SP4_NONE */
3171 BUG_ON(exid
->spa_how
!= SP4_NONE
);
3172 WRITE32(exid
->spa_how
);
3174 /* The server_owner struct */
3175 WRITE64(minor_id
); /* Minor id */
3177 WRITE32(major_id_sz
);
3178 WRITEMEM(major_id
, major_id_sz
);
3181 WRITE32(server_scope_sz
);
3182 WRITEMEM(server_scope
, server_scope_sz
);
3184 /* Implementation id */
3185 WRITE32(0); /* zero length nfs_impl_id4 array */
3191 nfsd4_encode_create_session(struct nfsd4_compoundres
*resp
, int nfserr
,
3192 struct nfsd4_create_session
*sess
)
3200 WRITEMEM(sess
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
3201 WRITE32(sess
->seqid
);
3202 WRITE32(sess
->flags
);
3206 WRITE32(0); /* headerpadsz */
3207 WRITE32(sess
->fore_channel
.maxreq_sz
);
3208 WRITE32(sess
->fore_channel
.maxresp_sz
);
3209 WRITE32(sess
->fore_channel
.maxresp_cached
);
3210 WRITE32(sess
->fore_channel
.maxops
);
3211 WRITE32(sess
->fore_channel
.maxreqs
);
3212 WRITE32(sess
->fore_channel
.nr_rdma_attrs
);
3215 if (sess
->fore_channel
.nr_rdma_attrs
) {
3217 WRITE32(sess
->fore_channel
.rdma_attrs
);
3222 WRITE32(0); /* headerpadsz */
3223 WRITE32(sess
->back_channel
.maxreq_sz
);
3224 WRITE32(sess
->back_channel
.maxresp_sz
);
3225 WRITE32(sess
->back_channel
.maxresp_cached
);
3226 WRITE32(sess
->back_channel
.maxops
);
3227 WRITE32(sess
->back_channel
.maxreqs
);
3228 WRITE32(sess
->back_channel
.nr_rdma_attrs
);
3231 if (sess
->back_channel
.nr_rdma_attrs
) {
3233 WRITE32(sess
->back_channel
.rdma_attrs
);
3240 nfsd4_encode_destroy_session(struct nfsd4_compoundres
*resp
, int nfserr
,
3241 struct nfsd4_destroy_session
*destroy_session
)
3247 nfsd4_encode_free_stateid(struct nfsd4_compoundres
*resp
, int nfserr
,
3248 struct nfsd4_free_stateid
*free_stateid
)
3262 nfsd4_encode_sequence(struct nfsd4_compoundres
*resp
, int nfserr
,
3263 struct nfsd4_sequence
*seq
)
3270 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN
+ 20);
3271 WRITEMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
3272 WRITE32(seq
->seqid
);
3273 WRITE32(seq
->slotid
);
3274 /* Note slotid's are numbered from zero: */
3275 WRITE32(seq
->maxslots
- 1); /* sr_highest_slotid */
3276 WRITE32(seq
->maxslots
- 1); /* sr_target_highest_slotid */
3277 WRITE32(seq
->status_flags
);
3280 resp
->cstate
.datap
= p
; /* DRC cache data pointer */
3285 nfsd4_encode_test_stateid(struct nfsd4_compoundres
*resp
, int nfserr
,
3286 struct nfsd4_test_stateid
*test_stateid
)
3288 struct nfsd4_compoundargs
*argp
;
3294 restore_buf(test_stateid
->ts_saved_args
, &test_stateid
->ts_savedp
);
3295 argp
= test_stateid
->ts_saved_args
;
3298 *p
++ = htonl(test_stateid
->ts_num_ids
);
3302 for (i
= 0; i
< test_stateid
->ts_num_ids
; i
++) {
3303 nfsd4_decode_stateid(argp
, &si
);
3304 valid
= nfs4_validate_stateid(&si
, test_stateid
->ts_has_session
);
3306 *p
++ = htonl(valid
);
3309 nfs4_unlock_state();
3315 nfsd4_encode_noop(struct nfsd4_compoundres
*resp
, __be32 nfserr
, void *p
)
3320 typedef __be32(* nfsd4_enc
)(struct nfsd4_compoundres
*, __be32
, void *);
3323 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3324 * since we don't need to filter out obsolete ops as this is
3325 * done in the decoding phase.
3327 static nfsd4_enc nfsd4_enc_ops
[] = {
3328 [OP_ACCESS
] = (nfsd4_enc
)nfsd4_encode_access
,
3329 [OP_CLOSE
] = (nfsd4_enc
)nfsd4_encode_close
,
3330 [OP_COMMIT
] = (nfsd4_enc
)nfsd4_encode_commit
,
3331 [OP_CREATE
] = (nfsd4_enc
)nfsd4_encode_create
,
3332 [OP_DELEGPURGE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3333 [OP_DELEGRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3334 [OP_GETATTR
] = (nfsd4_enc
)nfsd4_encode_getattr
,
3335 [OP_GETFH
] = (nfsd4_enc
)nfsd4_encode_getfh
,
3336 [OP_LINK
] = (nfsd4_enc
)nfsd4_encode_link
,
3337 [OP_LOCK
] = (nfsd4_enc
)nfsd4_encode_lock
,
3338 [OP_LOCKT
] = (nfsd4_enc
)nfsd4_encode_lockt
,
3339 [OP_LOCKU
] = (nfsd4_enc
)nfsd4_encode_locku
,
3340 [OP_LOOKUP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3341 [OP_LOOKUPP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3342 [OP_NVERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3343 [OP_OPEN
] = (nfsd4_enc
)nfsd4_encode_open
,
3344 [OP_OPENATTR
] = (nfsd4_enc
)nfsd4_encode_noop
,
3345 [OP_OPEN_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_open_confirm
,
3346 [OP_OPEN_DOWNGRADE
] = (nfsd4_enc
)nfsd4_encode_open_downgrade
,
3347 [OP_PUTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3348 [OP_PUTPUBFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3349 [OP_PUTROOTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3350 [OP_READ
] = (nfsd4_enc
)nfsd4_encode_read
,
3351 [OP_READDIR
] = (nfsd4_enc
)nfsd4_encode_readdir
,
3352 [OP_READLINK
] = (nfsd4_enc
)nfsd4_encode_readlink
,
3353 [OP_REMOVE
] = (nfsd4_enc
)nfsd4_encode_remove
,
3354 [OP_RENAME
] = (nfsd4_enc
)nfsd4_encode_rename
,
3355 [OP_RENEW
] = (nfsd4_enc
)nfsd4_encode_noop
,
3356 [OP_RESTOREFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3357 [OP_SAVEFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3358 [OP_SECINFO
] = (nfsd4_enc
)nfsd4_encode_secinfo
,
3359 [OP_SETATTR
] = (nfsd4_enc
)nfsd4_encode_setattr
,
3360 [OP_SETCLIENTID
] = (nfsd4_enc
)nfsd4_encode_setclientid
,
3361 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_noop
,
3362 [OP_VERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3363 [OP_WRITE
] = (nfsd4_enc
)nfsd4_encode_write
,
3364 [OP_RELEASE_LOCKOWNER
] = (nfsd4_enc
)nfsd4_encode_noop
,
3366 /* NFSv4.1 operations */
3367 [OP_BACKCHANNEL_CTL
] = (nfsd4_enc
)nfsd4_encode_noop
,
3368 [OP_BIND_CONN_TO_SESSION
] = (nfsd4_enc
)nfsd4_encode_bind_conn_to_session
,
3369 [OP_EXCHANGE_ID
] = (nfsd4_enc
)nfsd4_encode_exchange_id
,
3370 [OP_CREATE_SESSION
] = (nfsd4_enc
)nfsd4_encode_create_session
,
3371 [OP_DESTROY_SESSION
] = (nfsd4_enc
)nfsd4_encode_destroy_session
,
3372 [OP_FREE_STATEID
] = (nfsd4_enc
)nfsd4_encode_free_stateid
,
3373 [OP_GET_DIR_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3374 [OP_GETDEVICEINFO
] = (nfsd4_enc
)nfsd4_encode_noop
,
3375 [OP_GETDEVICELIST
] = (nfsd4_enc
)nfsd4_encode_noop
,
3376 [OP_LAYOUTCOMMIT
] = (nfsd4_enc
)nfsd4_encode_noop
,
3377 [OP_LAYOUTGET
] = (nfsd4_enc
)nfsd4_encode_noop
,
3378 [OP_LAYOUTRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3379 [OP_SECINFO_NO_NAME
] = (nfsd4_enc
)nfsd4_encode_secinfo_no_name
,
3380 [OP_SEQUENCE
] = (nfsd4_enc
)nfsd4_encode_sequence
,
3381 [OP_SET_SSV
] = (nfsd4_enc
)nfsd4_encode_noop
,
3382 [OP_TEST_STATEID
] = (nfsd4_enc
)nfsd4_encode_test_stateid
,
3383 [OP_WANT_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3384 [OP_DESTROY_CLIENTID
] = (nfsd4_enc
)nfsd4_encode_noop
,
3385 [OP_RECLAIM_COMPLETE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3389 * Calculate the total amount of memory that the compound response has taken
3390 * after encoding the current operation.
3392 * pad: add on 8 bytes for the next operation's op_code and status so that
3393 * there is room to cache a failure on the next operation.
3395 * Compare this length to the session se_fmaxresp_cached.
3397 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3398 * will be at least a page and will therefore hold the xdr_buf head.
3400 static int nfsd4_check_drc_limit(struct nfsd4_compoundres
*resp
)
3403 struct xdr_buf
*xb
= &resp
->rqstp
->rq_res
;
3404 struct nfsd4_compoundargs
*args
= resp
->rqstp
->rq_argp
;
3405 struct nfsd4_session
*session
= NULL
;
3406 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
3407 u32 length
, tlen
= 0, pad
= 8;
3409 if (!nfsd4_has_session(&resp
->cstate
))
3412 session
= resp
->cstate
.session
;
3413 if (session
== NULL
|| slot
->sl_cachethis
== 0)
3416 if (resp
->opcnt
>= args
->opcnt
)
3417 pad
= 0; /* this is the last operation */
3419 if (xb
->page_len
== 0) {
3420 length
= (char *)resp
->p
- (char *)xb
->head
[0].iov_base
+ pad
;
3422 if (xb
->tail
[0].iov_base
&& xb
->tail
[0].iov_len
> 0)
3423 tlen
= (char *)resp
->p
- (char *)xb
->tail
[0].iov_base
;
3425 length
= xb
->head
[0].iov_len
+ xb
->page_len
+ tlen
+ pad
;
3427 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__
,
3428 length
, xb
->page_len
, tlen
, pad
);
3430 if (length
<= session
->se_fchannel
.maxresp_cached
)
3433 return nfserr_rep_too_big_to_cache
;
3437 nfsd4_encode_operation(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3444 statp
= p
++; /* to be backfilled at the end */
3447 if (op
->opnum
== OP_ILLEGAL
)
3449 BUG_ON(op
->opnum
< 0 || op
->opnum
>= ARRAY_SIZE(nfsd4_enc_ops
) ||
3450 !nfsd4_enc_ops
[op
->opnum
]);
3451 op
->status
= nfsd4_enc_ops
[op
->opnum
](resp
, op
->status
, &op
->u
);
3452 /* nfsd4_check_drc_limit guarantees enough room for error status */
3453 if (!op
->status
&& nfsd4_check_drc_limit(resp
))
3454 op
->status
= nfserr_rep_too_big_to_cache
;
3457 * Note: We write the status directly, instead of using WRITE32(),
3458 * since it is already in network byte order.
3460 *statp
= op
->status
;
3464 * Encode the reply stored in the stateowner reply cache
3466 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3467 * previously sent already encoded operation.
3469 * called with nfs4_lock_state() held
3472 nfsd4_encode_replay(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3475 struct nfs4_replay
*rp
= op
->replay
;
3481 *p
++ = rp
->rp_status
; /* already xdr'ed */
3484 RESERVE_SPACE(rp
->rp_buflen
);
3485 WRITEMEM(rp
->rp_buf
, rp
->rp_buflen
);
3490 nfs4svc_encode_voidres(struct svc_rqst
*rqstp
, __be32
*p
, void *dummy
)
3492 return xdr_ressize_check(rqstp
, p
);
3495 int nfsd4_release_compoundargs(void *rq
, __be32
*p
, void *resp
)
3497 struct svc_rqst
*rqstp
= rq
;
3498 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
3500 if (args
->ops
!= args
->iops
) {
3502 args
->ops
= args
->iops
;
3506 while (args
->to_free
) {
3507 struct tmpbuf
*tb
= args
->to_free
;
3508 args
->to_free
= tb
->next
;
3509 tb
->release(tb
->buf
);
3516 nfs4svc_decode_compoundargs(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundargs
*args
)
3519 args
->end
= rqstp
->rq_arg
.head
[0].iov_base
+ rqstp
->rq_arg
.head
[0].iov_len
;
3520 args
->pagelist
= rqstp
->rq_arg
.pages
;
3521 args
->pagelen
= rqstp
->rq_arg
.page_len
;
3523 args
->to_free
= NULL
;
3524 args
->ops
= args
->iops
;
3525 args
->rqstp
= rqstp
;
3527 return !nfsd4_decode_compound(args
);
3531 nfs4svc_encode_compoundres(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundres
*resp
)
3534 * All that remains is to write the tag and operation count...
3536 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
3539 *p
++ = htonl(resp
->taglen
);
3540 memcpy(p
, resp
->tag
, resp
->taglen
);
3541 p
+= XDR_QUADLEN(resp
->taglen
);
3542 *p
++ = htonl(resp
->opcnt
);
3544 if (rqstp
->rq_res
.page_len
)
3545 iov
= &rqstp
->rq_res
.tail
[0];
3547 iov
= &rqstp
->rq_res
.head
[0];
3548 iov
->iov_len
= ((char*)resp
->p
) - (char*)iov
->iov_base
;
3549 BUG_ON(iov
->iov_len
> PAGE_SIZE
);
3550 if (nfsd4_has_session(cs
)) {
3551 if (cs
->status
!= nfserr_replay_cache
) {
3552 nfsd4_store_cache_entry(resp
);
3553 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__
);
3554 cs
->slot
->sl_inuse
= false;
3556 /* Renew the clientid on success and on replay */
3557 release_session_client(cs
->session
);
3558 nfsd4_put_session(cs
->session
);