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.
36 #include <linux/slab.h>
37 #include <linux/namei.h>
38 #include <linux/statfs.h>
39 #include <linux/utsname.h>
40 #include <linux/pagemap.h>
41 #include <linux/sunrpc/svcauth_gss.h>
51 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52 #include <linux/security.h>
56 #define NFSDDBG_FACILITY NFSDDBG_XDR
59 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
60 * directory in order to indicate to the client that a filesystem boundary is present
61 * We use a fixed fsid for a referral
63 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
64 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67 check_filename(char *str
, int len
)
73 if (isdotent(str
, len
))
74 return nfserr_badname
;
75 for (i
= 0; i
< len
; i
++)
77 return nfserr_badname
;
89 dprintk("NFSD: xdr error (%s:%d)\n", \
90 __FILE__, __LINE__); \
91 status = nfserr_bad_xdr; \
94 #define READMEM(x,nbytes) do { \
96 p += XDR_QUADLEN(nbytes); \
98 #define SAVEMEM(x,nbytes) do { \
99 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
100 savemem(argp, p, nbytes) : \
102 dprintk("NFSD: xdr error (%s:%d)\n", \
103 __FILE__, __LINE__); \
106 p += XDR_QUADLEN(nbytes); \
108 #define COPYMEM(x,nbytes) do { \
109 memcpy((x), p, nbytes); \
110 p += XDR_QUADLEN(nbytes); \
113 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
114 #define READ_BUF(nbytes) do { \
115 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
117 argp->p += XDR_QUADLEN(nbytes); \
118 } else if (!(p = read_buf(argp, nbytes))) { \
119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
125 static void next_decode_page(struct nfsd4_compoundargs
*argp
)
127 argp
->p
= page_address(argp
->pagelist
[0]);
129 if (argp
->pagelen
< PAGE_SIZE
) {
130 argp
->end
= argp
->p
+ (argp
->pagelen
>>2);
133 argp
->end
= argp
->p
+ (PAGE_SIZE
>>2);
134 argp
->pagelen
-= PAGE_SIZE
;
138 static __be32
*read_buf(struct nfsd4_compoundargs
*argp
, u32 nbytes
)
140 /* We want more bytes than seem to be available.
141 * Maybe we need a new page, maybe we have just run out
143 unsigned int avail
= (char *)argp
->end
- (char *)argp
->p
;
145 if (avail
+ argp
->pagelen
< nbytes
)
147 if (avail
+ PAGE_SIZE
< nbytes
) /* need more than a page !! */
149 /* ok, we can do it with the current plus the next page */
150 if (nbytes
<= sizeof(argp
->tmp
))
154 p
= argp
->tmpp
= kmalloc(nbytes
, GFP_KERNEL
);
160 * The following memcpy is safe because read_buf is always
161 * called with nbytes > avail, and the two cases above both
162 * guarantee p points to at least nbytes bytes.
164 memcpy(p
, argp
->p
, avail
);
165 next_decode_page(argp
);
166 memcpy(((char*)p
)+avail
, argp
->p
, (nbytes
- avail
));
167 argp
->p
+= XDR_QUADLEN(nbytes
- avail
);
171 static int zero_clientid(clientid_t
*clid
)
173 return (clid
->cl_boot
== 0) && (clid
->cl_id
== 0);
177 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
178 * @argp: NFSv4 compound argument structure
179 * @p: pointer to be freed (with kfree())
181 * Marks @p to be freed when processing the compound operation
182 * described in @argp finishes.
185 svcxdr_tmpalloc(struct nfsd4_compoundargs
*argp
, u32 len
)
187 struct svcxdr_tmpbuf
*tb
;
189 tb
= kmalloc(sizeof(*tb
) + len
, GFP_KERNEL
);
192 tb
->next
= argp
->to_free
;
198 * For xdr strings that need to be passed to other kernel api's
199 * as null-terminated strings.
201 * Note null-terminating in place usually isn't safe since the
202 * buffer might end on a page boundary.
205 svcxdr_dupstr(struct nfsd4_compoundargs
*argp
, void *buf
, u32 len
)
207 char *p
= svcxdr_tmpalloc(argp
, len
+ 1);
217 * savemem - duplicate a chunk of memory for later processing
218 * @argp: NFSv4 compound argument structure to be freed with
219 * @p: pointer to be duplicated
220 * @nbytes: length to be duplicated
222 * Returns a pointer to a copy of @nbytes bytes of memory at @p
223 * that are preserved until processing of the NFSv4 compound
224 * operation described by @argp finishes.
226 static char *savemem(struct nfsd4_compoundargs
*argp
, __be32
*p
, int nbytes
)
230 ret
= svcxdr_tmpalloc(argp
, nbytes
);
233 memcpy(ret
, p
, nbytes
);
238 nfsd4_decode_bitmap(struct nfsd4_compoundargs
*argp
, u32
*bmval
)
248 bmlen
= be32_to_cpup(p
++);
252 READ_BUF(bmlen
<< 2);
254 bmval
[0] = be32_to_cpup(p
++);
256 bmval
[1] = be32_to_cpup(p
++);
258 bmval
[2] = be32_to_cpup(p
++);
264 nfsd4_decode_fattr(struct nfsd4_compoundargs
*argp
, u32
*bmval
,
265 struct iattr
*iattr
, struct nfs4_acl
**acl
,
266 struct xdr_netobj
*label
)
268 int expected_len
, len
= 0;
275 if ((status
= nfsd4_decode_bitmap(argp
, bmval
)))
279 expected_len
= be32_to_cpup(p
++);
281 if (bmval
[0] & FATTR4_WORD0_SIZE
) {
284 p
= xdr_decode_hyper(p
, &iattr
->ia_size
);
285 iattr
->ia_valid
|= ATTR_SIZE
;
287 if (bmval
[0] & FATTR4_WORD0_ACL
) {
289 struct nfs4_ace
*ace
;
291 READ_BUF(4); len
+= 4;
292 nace
= be32_to_cpup(p
++);
294 if (nace
> NFS4_ACL_MAX
)
297 *acl
= svcxdr_tmpalloc(argp
, nfs4_acl_bytes(nace
));
299 return nfserr_jukebox
;
301 (*acl
)->naces
= nace
;
302 for (ace
= (*acl
)->aces
; ace
< (*acl
)->aces
+ nace
; ace
++) {
303 READ_BUF(16); len
+= 16;
304 ace
->type
= be32_to_cpup(p
++);
305 ace
->flag
= be32_to_cpup(p
++);
306 ace
->access_mask
= be32_to_cpup(p
++);
307 dummy32
= be32_to_cpup(p
++);
309 len
+= XDR_QUADLEN(dummy32
) << 2;
310 READMEM(buf
, dummy32
);
311 ace
->whotype
= nfs4_acl_get_whotype(buf
, dummy32
);
313 if (ace
->whotype
!= NFS4_ACL_WHO_NAMED
)
315 else if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
316 status
= nfsd_map_name_to_gid(argp
->rqstp
,
317 buf
, dummy32
, &ace
->who_gid
);
319 status
= nfsd_map_name_to_uid(argp
->rqstp
,
320 buf
, dummy32
, &ace
->who_uid
);
326 if (bmval
[1] & FATTR4_WORD1_MODE
) {
329 iattr
->ia_mode
= be32_to_cpup(p
++);
330 iattr
->ia_mode
&= (S_IFMT
| S_IALLUGO
);
331 iattr
->ia_valid
|= ATTR_MODE
;
333 if (bmval
[1] & FATTR4_WORD1_OWNER
) {
336 dummy32
= be32_to_cpup(p
++);
338 len
+= (XDR_QUADLEN(dummy32
) << 2);
339 READMEM(buf
, dummy32
);
340 if ((status
= nfsd_map_name_to_uid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_uid
)))
342 iattr
->ia_valid
|= ATTR_UID
;
344 if (bmval
[1] & FATTR4_WORD1_OWNER_GROUP
) {
347 dummy32
= be32_to_cpup(p
++);
349 len
+= (XDR_QUADLEN(dummy32
) << 2);
350 READMEM(buf
, dummy32
);
351 if ((status
= nfsd_map_name_to_gid(argp
->rqstp
, buf
, dummy32
, &iattr
->ia_gid
)))
353 iattr
->ia_valid
|= ATTR_GID
;
355 if (bmval
[1] & FATTR4_WORD1_TIME_ACCESS_SET
) {
358 dummy32
= be32_to_cpup(p
++);
360 case NFS4_SET_TO_CLIENT_TIME
:
361 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
362 all 32 bits of 'nseconds'. */
365 p
= xdr_decode_hyper(p
, &sec
);
366 iattr
->ia_atime
.tv_sec
= (time_t)sec
;
367 iattr
->ia_atime
.tv_nsec
= be32_to_cpup(p
++);
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
) {
382 dummy32
= be32_to_cpup(p
++);
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'. */
389 p
= xdr_decode_hyper(p
, &sec
);
390 iattr
->ia_mtime
.tv_sec
= sec
;
391 iattr
->ia_mtime
.tv_nsec
= be32_to_cpup(p
++);
392 if (iattr
->ia_mtime
.tv_nsec
>= (u32
)1000000000)
394 iattr
->ia_valid
|= (ATTR_MTIME
| ATTR_MTIME_SET
);
396 case NFS4_SET_TO_SERVER_TIME
:
397 iattr
->ia_valid
|= ATTR_MTIME
;
405 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
406 if (bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) {
409 dummy32
= be32_to_cpup(p
++); /* lfs: we don't use it */
412 dummy32
= be32_to_cpup(p
++); /* pi: we don't use it either */
415 dummy32
= be32_to_cpup(p
++);
417 if (dummy32
> NFSD4_MAX_SEC_LABEL_LEN
)
418 return nfserr_badlabel
;
419 len
+= (XDR_QUADLEN(dummy32
) << 2);
420 READMEM(buf
, dummy32
);
421 label
->len
= dummy32
;
422 label
->data
= svcxdr_dupstr(argp
, buf
, dummy32
);
424 return nfserr_jukebox
;
428 if (bmval
[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
429 || bmval
[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
430 || bmval
[2] & ~NFSD_WRITEABLE_ATTRS_WORD2
)
431 READ_BUF(expected_len
- len
);
432 else if (len
!= expected_len
)
439 nfsd4_decode_stateid(struct nfsd4_compoundargs
*argp
, stateid_t
*sid
)
443 READ_BUF(sizeof(stateid_t
));
444 sid
->si_generation
= be32_to_cpup(p
++);
445 COPYMEM(&sid
->si_opaque
, sizeof(stateid_opaque_t
));
451 nfsd4_decode_access(struct nfsd4_compoundargs
*argp
, struct nfsd4_access
*access
)
456 access
->ac_req_access
= be32_to_cpup(p
++);
461 static __be32
nfsd4_decode_cb_sec(struct nfsd4_compoundargs
*argp
, struct nfsd4_cb_sec
*cbs
)
469 /* callback_sec_params4 */
471 nr_secflavs
= be32_to_cpup(p
++);
473 cbs
->flavor
= (u32
)(-1);
475 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
477 for (i
= 0; i
< nr_secflavs
; ++i
) {
479 dummy
= be32_to_cpup(p
++);
482 /* Nothing to read */
483 if (cbs
->flavor
== (u32
)(-1))
484 cbs
->flavor
= RPC_AUTH_NULL
;
489 dummy
= be32_to_cpup(p
++);
492 dummy
= be32_to_cpup(p
++);
494 SAVEMEM(machine_name
, dummy
);
498 uid
= be32_to_cpup(p
++);
499 gid
= be32_to_cpup(p
++);
503 dummy
= be32_to_cpup(p
++);
505 if (cbs
->flavor
== (u32
)(-1)) {
506 kuid_t kuid
= make_kuid(&init_user_ns
, uid
);
507 kgid_t kgid
= make_kgid(&init_user_ns
, gid
);
508 if (uid_valid(kuid
) && gid_valid(kgid
)) {
511 cbs
->flavor
= RPC_AUTH_UNIX
;
513 dprintk("RPC_AUTH_UNIX with invalid"
514 "uid or gid ignoring!\n");
519 dprintk("RPC_AUTH_GSS callback secflavor "
523 dummy
= be32_to_cpup(p
++);
524 /* gcbp_handle_from_server */
525 dummy
= be32_to_cpup(p
++);
527 p
+= XDR_QUADLEN(dummy
);
528 /* gcbp_handle_from_client */
530 dummy
= be32_to_cpup(p
++);
534 dprintk("Illegal callback secflavor\n");
541 static __be32
nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs
*argp
, struct nfsd4_backchannel_ctl
*bc
)
546 bc
->bc_cb_program
= be32_to_cpup(p
++);
547 nfsd4_decode_cb_sec(argp
, &bc
->bc_cb_sec
);
552 static __be32
nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs
*argp
, struct nfsd4_bind_conn_to_session
*bcts
)
556 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 8);
557 COPYMEM(bcts
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
558 bcts
->dir
= be32_to_cpup(p
++);
559 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
560 * could help us figure out we should be using it. */
565 nfsd4_decode_close(struct nfsd4_compoundargs
*argp
, struct nfsd4_close
*close
)
570 close
->cl_seqid
= be32_to_cpup(p
++);
571 return nfsd4_decode_stateid(argp
, &close
->cl_stateid
);
578 nfsd4_decode_commit(struct nfsd4_compoundargs
*argp
, struct nfsd4_commit
*commit
)
583 p
= xdr_decode_hyper(p
, &commit
->co_offset
);
584 commit
->co_count
= be32_to_cpup(p
++);
590 nfsd4_decode_create(struct nfsd4_compoundargs
*argp
, struct nfsd4_create
*create
)
595 create
->cr_type
= be32_to_cpup(p
++);
596 switch (create
->cr_type
) {
599 create
->cr_datalen
= be32_to_cpup(p
++);
600 READ_BUF(create
->cr_datalen
);
601 create
->cr_data
= svcxdr_dupstr(argp
, p
, create
->cr_datalen
);
602 if (!create
->cr_data
)
603 return nfserr_jukebox
;
608 create
->cr_specdata1
= be32_to_cpup(p
++);
609 create
->cr_specdata2
= be32_to_cpup(p
++);
619 create
->cr_namelen
= be32_to_cpup(p
++);
620 READ_BUF(create
->cr_namelen
);
621 SAVEMEM(create
->cr_name
, create
->cr_namelen
);
622 if ((status
= check_filename(create
->cr_name
, create
->cr_namelen
)))
625 status
= nfsd4_decode_fattr(argp
, create
->cr_bmval
, &create
->cr_iattr
,
626 &create
->cr_acl
, &create
->cr_label
);
634 nfsd4_decode_delegreturn(struct nfsd4_compoundargs
*argp
, struct nfsd4_delegreturn
*dr
)
636 return nfsd4_decode_stateid(argp
, &dr
->dr_stateid
);
640 nfsd4_decode_getattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_getattr
*getattr
)
642 return nfsd4_decode_bitmap(argp
, getattr
->ga_bmval
);
646 nfsd4_decode_link(struct nfsd4_compoundargs
*argp
, struct nfsd4_link
*link
)
651 link
->li_namelen
= be32_to_cpup(p
++);
652 READ_BUF(link
->li_namelen
);
653 SAVEMEM(link
->li_name
, link
->li_namelen
);
654 if ((status
= check_filename(link
->li_name
, link
->li_namelen
)))
661 nfsd4_decode_lock(struct nfsd4_compoundargs
*argp
, struct nfsd4_lock
*lock
)
666 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 lock
->lk_type
= be32_to_cpup(p
++);
670 if ((lock
->lk_type
< NFS4_READ_LT
) || (lock
->lk_type
> NFS4_WRITEW_LT
))
672 lock
->lk_reclaim
= be32_to_cpup(p
++);
673 p
= xdr_decode_hyper(p
, &lock
->lk_offset
);
674 p
= xdr_decode_hyper(p
, &lock
->lk_length
);
675 lock
->lk_is_new
= be32_to_cpup(p
++);
677 if (lock
->lk_is_new
) {
679 lock
->lk_new_open_seqid
= be32_to_cpup(p
++);
680 status
= nfsd4_decode_stateid(argp
, &lock
->lk_new_open_stateid
);
683 READ_BUF(8 + sizeof(clientid_t
));
684 lock
->lk_new_lock_seqid
= be32_to_cpup(p
++);
685 COPYMEM(&lock
->lk_new_clientid
, sizeof(clientid_t
));
686 lock
->lk_new_owner
.len
= be32_to_cpup(p
++);
687 READ_BUF(lock
->lk_new_owner
.len
);
688 READMEM(lock
->lk_new_owner
.data
, lock
->lk_new_owner
.len
);
690 status
= nfsd4_decode_stateid(argp
, &lock
->lk_old_lock_stateid
);
694 lock
->lk_old_lock_seqid
= be32_to_cpup(p
++);
701 nfsd4_decode_lockt(struct nfsd4_compoundargs
*argp
, struct nfsd4_lockt
*lockt
)
706 lockt
->lt_type
= be32_to_cpup(p
++);
707 if((lockt
->lt_type
< NFS4_READ_LT
) || (lockt
->lt_type
> NFS4_WRITEW_LT
))
709 p
= xdr_decode_hyper(p
, &lockt
->lt_offset
);
710 p
= xdr_decode_hyper(p
, &lockt
->lt_length
);
711 COPYMEM(&lockt
->lt_clientid
, 8);
712 lockt
->lt_owner
.len
= be32_to_cpup(p
++);
713 READ_BUF(lockt
->lt_owner
.len
);
714 READMEM(lockt
->lt_owner
.data
, lockt
->lt_owner
.len
);
720 nfsd4_decode_locku(struct nfsd4_compoundargs
*argp
, struct nfsd4_locku
*locku
)
725 locku
->lu_type
= be32_to_cpup(p
++);
726 if ((locku
->lu_type
< NFS4_READ_LT
) || (locku
->lu_type
> NFS4_WRITEW_LT
))
728 locku
->lu_seqid
= be32_to_cpup(p
++);
729 status
= nfsd4_decode_stateid(argp
, &locku
->lu_stateid
);
733 p
= xdr_decode_hyper(p
, &locku
->lu_offset
);
734 p
= xdr_decode_hyper(p
, &locku
->lu_length
);
740 nfsd4_decode_lookup(struct nfsd4_compoundargs
*argp
, struct nfsd4_lookup
*lookup
)
745 lookup
->lo_len
= be32_to_cpup(p
++);
746 READ_BUF(lookup
->lo_len
);
747 SAVEMEM(lookup
->lo_name
, lookup
->lo_len
);
748 if ((status
= check_filename(lookup
->lo_name
, lookup
->lo_len
)))
754 static __be32
nfsd4_decode_share_access(struct nfsd4_compoundargs
*argp
, u32
*share_access
, u32
*deleg_want
, u32
*deleg_when
)
760 w
= be32_to_cpup(p
++);
761 *share_access
= w
& NFS4_SHARE_ACCESS_MASK
;
762 *deleg_want
= w
& NFS4_SHARE_WANT_MASK
;
764 *deleg_when
= w
& NFS4_SHARE_WHEN_MASK
;
766 switch (w
& NFS4_SHARE_ACCESS_MASK
) {
767 case NFS4_SHARE_ACCESS_READ
:
768 case NFS4_SHARE_ACCESS_WRITE
:
769 case NFS4_SHARE_ACCESS_BOTH
:
772 return nfserr_bad_xdr
;
774 w
&= ~NFS4_SHARE_ACCESS_MASK
;
777 if (!argp
->minorversion
)
778 return nfserr_bad_xdr
;
779 switch (w
& NFS4_SHARE_WANT_MASK
) {
780 case NFS4_SHARE_WANT_NO_PREFERENCE
:
781 case NFS4_SHARE_WANT_READ_DELEG
:
782 case NFS4_SHARE_WANT_WRITE_DELEG
:
783 case NFS4_SHARE_WANT_ANY_DELEG
:
784 case NFS4_SHARE_WANT_NO_DELEG
:
785 case NFS4_SHARE_WANT_CANCEL
:
788 return nfserr_bad_xdr
;
790 w
&= ~NFS4_SHARE_WANT_MASK
;
794 if (!deleg_when
) /* open_downgrade */
797 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL
:
798 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
:
799 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL
|
800 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
):
804 return nfserr_bad_xdr
;
807 static __be32
nfsd4_decode_share_deny(struct nfsd4_compoundargs
*argp
, u32
*x
)
812 *x
= be32_to_cpup(p
++);
813 /* Note: unlinke access bits, deny bits may be zero. */
814 if (*x
& ~NFS4_SHARE_DENY_BOTH
)
815 return nfserr_bad_xdr
;
818 return nfserr_bad_xdr
;
821 static __be32
nfsd4_decode_opaque(struct nfsd4_compoundargs
*argp
, struct xdr_netobj
*o
)
826 o
->len
= be32_to_cpup(p
++);
828 if (o
->len
== 0 || o
->len
> NFS4_OPAQUE_LIMIT
)
829 return nfserr_bad_xdr
;
832 SAVEMEM(o
->data
, o
->len
);
835 return nfserr_bad_xdr
;
839 nfsd4_decode_open(struct nfsd4_compoundargs
*argp
, struct nfsd4_open
*open
)
844 memset(open
->op_bmval
, 0, sizeof(open
->op_bmval
));
845 open
->op_iattr
.ia_valid
= 0;
846 open
->op_openowner
= NULL
;
848 open
->op_xdr_error
= 0;
849 /* seqid, share_access, share_deny, clientid, ownerlen */
851 open
->op_seqid
= be32_to_cpup(p
++);
852 /* decode, yet ignore deleg_when until supported */
853 status
= nfsd4_decode_share_access(argp
, &open
->op_share_access
,
854 &open
->op_deleg_want
, &dummy
);
857 status
= nfsd4_decode_share_deny(argp
, &open
->op_share_deny
);
860 READ_BUF(sizeof(clientid_t
));
861 COPYMEM(&open
->op_clientid
, sizeof(clientid_t
));
862 status
= nfsd4_decode_opaque(argp
, &open
->op_owner
);
866 open
->op_create
= be32_to_cpup(p
++);
867 switch (open
->op_create
) {
868 case NFS4_OPEN_NOCREATE
:
870 case NFS4_OPEN_CREATE
:
872 open
->op_createmode
= be32_to_cpup(p
++);
873 switch (open
->op_createmode
) {
874 case NFS4_CREATE_UNCHECKED
:
875 case NFS4_CREATE_GUARDED
:
876 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
877 &open
->op_iattr
, &open
->op_acl
, &open
->op_label
);
881 case NFS4_CREATE_EXCLUSIVE
:
882 READ_BUF(NFS4_VERIFIER_SIZE
);
883 COPYMEM(open
->op_verf
.data
, NFS4_VERIFIER_SIZE
);
885 case NFS4_CREATE_EXCLUSIVE4_1
:
886 if (argp
->minorversion
< 1)
888 READ_BUF(NFS4_VERIFIER_SIZE
);
889 COPYMEM(open
->op_verf
.data
, NFS4_VERIFIER_SIZE
);
890 status
= nfsd4_decode_fattr(argp
, open
->op_bmval
,
891 &open
->op_iattr
, &open
->op_acl
, &open
->op_label
);
905 open
->op_claim_type
= be32_to_cpup(p
++);
906 switch (open
->op_claim_type
) {
907 case NFS4_OPEN_CLAIM_NULL
:
908 case NFS4_OPEN_CLAIM_DELEGATE_PREV
:
910 open
->op_fname
.len
= be32_to_cpup(p
++);
911 READ_BUF(open
->op_fname
.len
);
912 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
913 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
)))
916 case NFS4_OPEN_CLAIM_PREVIOUS
:
918 open
->op_delegate_type
= be32_to_cpup(p
++);
920 case NFS4_OPEN_CLAIM_DELEGATE_CUR
:
921 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
925 open
->op_fname
.len
= be32_to_cpup(p
++);
926 READ_BUF(open
->op_fname
.len
);
927 SAVEMEM(open
->op_fname
.data
, open
->op_fname
.len
);
928 if ((status
= check_filename(open
->op_fname
.data
, open
->op_fname
.len
)))
931 case NFS4_OPEN_CLAIM_FH
:
932 case NFS4_OPEN_CLAIM_DELEG_PREV_FH
:
933 if (argp
->minorversion
< 1)
937 case NFS4_OPEN_CLAIM_DELEG_CUR_FH
:
938 if (argp
->minorversion
< 1)
940 status
= nfsd4_decode_stateid(argp
, &open
->op_delegate_stateid
);
952 nfsd4_decode_open_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_confirm
*open_conf
)
956 if (argp
->minorversion
>= 1)
957 return nfserr_notsupp
;
959 status
= nfsd4_decode_stateid(argp
, &open_conf
->oc_req_stateid
);
963 open_conf
->oc_seqid
= be32_to_cpup(p
++);
969 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs
*argp
, struct nfsd4_open_downgrade
*open_down
)
973 status
= nfsd4_decode_stateid(argp
, &open_down
->od_stateid
);
977 open_down
->od_seqid
= be32_to_cpup(p
++);
978 status
= nfsd4_decode_share_access(argp
, &open_down
->od_share_access
,
979 &open_down
->od_deleg_want
, NULL
);
982 status
= nfsd4_decode_share_deny(argp
, &open_down
->od_share_deny
);
989 nfsd4_decode_putfh(struct nfsd4_compoundargs
*argp
, struct nfsd4_putfh
*putfh
)
994 putfh
->pf_fhlen
= be32_to_cpup(p
++);
995 if (putfh
->pf_fhlen
> NFS4_FHSIZE
)
997 READ_BUF(putfh
->pf_fhlen
);
998 SAVEMEM(putfh
->pf_fhval
, putfh
->pf_fhlen
);
1004 nfsd4_decode_putpubfh(struct nfsd4_compoundargs
*argp
, void *p
)
1006 if (argp
->minorversion
== 0)
1008 return nfserr_notsupp
;
1012 nfsd4_decode_read(struct nfsd4_compoundargs
*argp
, struct nfsd4_read
*read
)
1016 status
= nfsd4_decode_stateid(argp
, &read
->rd_stateid
);
1020 p
= xdr_decode_hyper(p
, &read
->rd_offset
);
1021 read
->rd_length
= be32_to_cpup(p
++);
1027 nfsd4_decode_readdir(struct nfsd4_compoundargs
*argp
, struct nfsd4_readdir
*readdir
)
1032 p
= xdr_decode_hyper(p
, &readdir
->rd_cookie
);
1033 COPYMEM(readdir
->rd_verf
.data
, sizeof(readdir
->rd_verf
.data
));
1034 readdir
->rd_dircount
= be32_to_cpup(p
++);
1035 readdir
->rd_maxcount
= be32_to_cpup(p
++);
1036 if ((status
= nfsd4_decode_bitmap(argp
, readdir
->rd_bmval
)))
1043 nfsd4_decode_remove(struct nfsd4_compoundargs
*argp
, struct nfsd4_remove
*remove
)
1048 remove
->rm_namelen
= be32_to_cpup(p
++);
1049 READ_BUF(remove
->rm_namelen
);
1050 SAVEMEM(remove
->rm_name
, remove
->rm_namelen
);
1051 if ((status
= check_filename(remove
->rm_name
, remove
->rm_namelen
)))
1058 nfsd4_decode_rename(struct nfsd4_compoundargs
*argp
, struct nfsd4_rename
*rename
)
1063 rename
->rn_snamelen
= be32_to_cpup(p
++);
1064 READ_BUF(rename
->rn_snamelen
+ 4);
1065 SAVEMEM(rename
->rn_sname
, rename
->rn_snamelen
);
1066 rename
->rn_tnamelen
= be32_to_cpup(p
++);
1067 READ_BUF(rename
->rn_tnamelen
);
1068 SAVEMEM(rename
->rn_tname
, rename
->rn_tnamelen
);
1069 if ((status
= check_filename(rename
->rn_sname
, rename
->rn_snamelen
)))
1071 if ((status
= check_filename(rename
->rn_tname
, rename
->rn_tnamelen
)))
1078 nfsd4_decode_renew(struct nfsd4_compoundargs
*argp
, clientid_t
*clientid
)
1082 if (argp
->minorversion
>= 1)
1083 return nfserr_notsupp
;
1085 READ_BUF(sizeof(clientid_t
));
1086 COPYMEM(clientid
, sizeof(clientid_t
));
1092 nfsd4_decode_secinfo(struct nfsd4_compoundargs
*argp
,
1093 struct nfsd4_secinfo
*secinfo
)
1098 secinfo
->si_namelen
= be32_to_cpup(p
++);
1099 READ_BUF(secinfo
->si_namelen
);
1100 SAVEMEM(secinfo
->si_name
, secinfo
->si_namelen
);
1101 status
= check_filename(secinfo
->si_name
, secinfo
->si_namelen
);
1108 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs
*argp
,
1109 struct nfsd4_secinfo_no_name
*sin
)
1114 sin
->sin_style
= be32_to_cpup(p
++);
1119 nfsd4_decode_setattr(struct nfsd4_compoundargs
*argp
, struct nfsd4_setattr
*setattr
)
1123 status
= nfsd4_decode_stateid(argp
, &setattr
->sa_stateid
);
1126 return nfsd4_decode_fattr(argp
, setattr
->sa_bmval
, &setattr
->sa_iattr
,
1127 &setattr
->sa_acl
, &setattr
->sa_label
);
1131 nfsd4_decode_setclientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid
*setclientid
)
1135 if (argp
->minorversion
>= 1)
1136 return nfserr_notsupp
;
1138 READ_BUF(NFS4_VERIFIER_SIZE
);
1139 COPYMEM(setclientid
->se_verf
.data
, NFS4_VERIFIER_SIZE
);
1141 status
= nfsd4_decode_opaque(argp
, &setclientid
->se_name
);
1143 return nfserr_bad_xdr
;
1145 setclientid
->se_callback_prog
= be32_to_cpup(p
++);
1146 setclientid
->se_callback_netid_len
= be32_to_cpup(p
++);
1148 READ_BUF(setclientid
->se_callback_netid_len
+ 4);
1149 SAVEMEM(setclientid
->se_callback_netid_val
, setclientid
->se_callback_netid_len
);
1150 setclientid
->se_callback_addr_len
= be32_to_cpup(p
++);
1152 READ_BUF(setclientid
->se_callback_addr_len
+ 4);
1153 SAVEMEM(setclientid
->se_callback_addr_val
, setclientid
->se_callback_addr_len
);
1154 setclientid
->se_callback_ident
= be32_to_cpup(p
++);
1160 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs
*argp
, struct nfsd4_setclientid_confirm
*scd_c
)
1164 if (argp
->minorversion
>= 1)
1165 return nfserr_notsupp
;
1167 READ_BUF(8 + NFS4_VERIFIER_SIZE
);
1168 COPYMEM(&scd_c
->sc_clientid
, 8);
1169 COPYMEM(&scd_c
->sc_confirm
, NFS4_VERIFIER_SIZE
);
1174 /* Also used for NVERIFY */
1176 nfsd4_decode_verify(struct nfsd4_compoundargs
*argp
, struct nfsd4_verify
*verify
)
1180 if ((status
= nfsd4_decode_bitmap(argp
, verify
->ve_bmval
)))
1183 /* For convenience's sake, we compare raw xdr'd attributes in
1184 * nfsd4_proc_verify */
1187 verify
->ve_attrlen
= be32_to_cpup(p
++);
1188 READ_BUF(verify
->ve_attrlen
);
1189 SAVEMEM(verify
->ve_attrval
, verify
->ve_attrlen
);
1195 nfsd4_decode_write(struct nfsd4_compoundargs
*argp
, struct nfsd4_write
*write
)
1201 status
= nfsd4_decode_stateid(argp
, &write
->wr_stateid
);
1205 p
= xdr_decode_hyper(p
, &write
->wr_offset
);
1206 write
->wr_stable_how
= be32_to_cpup(p
++);
1207 if (write
->wr_stable_how
> 2)
1209 write
->wr_buflen
= be32_to_cpup(p
++);
1211 /* Sorry .. no magic macros for this.. *
1212 * READ_BUF(write->wr_buflen);
1213 * SAVEMEM(write->wr_buf, write->wr_buflen);
1215 avail
= (char*)argp
->end
- (char*)argp
->p
;
1216 if (avail
+ argp
->pagelen
< write
->wr_buflen
) {
1217 dprintk("NFSD: xdr error (%s:%d)\n",
1218 __FILE__
, __LINE__
);
1221 write
->wr_head
.iov_base
= p
;
1222 write
->wr_head
.iov_len
= avail
;
1223 write
->wr_pagelist
= argp
->pagelist
;
1225 len
= XDR_QUADLEN(write
->wr_buflen
) << 2;
1231 pages
= len
>> PAGE_SHIFT
;
1232 argp
->pagelist
+= pages
;
1233 argp
->pagelen
-= pages
* PAGE_SIZE
;
1234 len
-= pages
* PAGE_SIZE
;
1236 argp
->p
= (__be32
*)page_address(argp
->pagelist
[0]);
1238 argp
->end
= argp
->p
+ XDR_QUADLEN(PAGE_SIZE
);
1240 argp
->p
+= XDR_QUADLEN(len
);
1246 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs
*argp
, struct nfsd4_release_lockowner
*rlockowner
)
1250 if (argp
->minorversion
>= 1)
1251 return nfserr_notsupp
;
1254 COPYMEM(&rlockowner
->rl_clientid
, sizeof(clientid_t
));
1255 rlockowner
->rl_owner
.len
= be32_to_cpup(p
++);
1256 READ_BUF(rlockowner
->rl_owner
.len
);
1257 READMEM(rlockowner
->rl_owner
.data
, rlockowner
->rl_owner
.len
);
1259 if (argp
->minorversion
&& !zero_clientid(&rlockowner
->rl_clientid
))
1260 return nfserr_inval
;
1265 nfsd4_decode_exchange_id(struct nfsd4_compoundargs
*argp
,
1266 struct nfsd4_exchange_id
*exid
)
1271 READ_BUF(NFS4_VERIFIER_SIZE
);
1272 COPYMEM(exid
->verifier
.data
, NFS4_VERIFIER_SIZE
);
1274 status
= nfsd4_decode_opaque(argp
, &exid
->clname
);
1276 return nfserr_bad_xdr
;
1279 exid
->flags
= be32_to_cpup(p
++);
1281 /* Ignore state_protect4_a */
1283 exid
->spa_how
= be32_to_cpup(p
++);
1284 switch (exid
->spa_how
) {
1288 /* spo_must_enforce */
1290 dummy
= be32_to_cpup(p
++);
1291 READ_BUF(dummy
* 4);
1294 /* spo_must_allow */
1296 dummy
= be32_to_cpup(p
++);
1297 READ_BUF(dummy
* 4);
1303 dummy
= be32_to_cpup(p
++);
1304 READ_BUF(dummy
* 4);
1308 dummy
= be32_to_cpup(p
++);
1309 READ_BUF(dummy
* 4);
1312 /* ssp_hash_algs<> */
1314 tmp
= be32_to_cpup(p
++);
1317 dummy
= be32_to_cpup(p
++);
1319 p
+= XDR_QUADLEN(dummy
);
1322 /* ssp_encr_algs<> */
1324 tmp
= be32_to_cpup(p
++);
1327 dummy
= be32_to_cpup(p
++);
1329 p
+= XDR_QUADLEN(dummy
);
1332 /* ssp_window and ssp_num_gss_handles */
1334 dummy
= be32_to_cpup(p
++);
1335 dummy
= be32_to_cpup(p
++);
1341 /* Ignore Implementation ID */
1342 READ_BUF(4); /* nfs_impl_id4 array length */
1343 dummy
= be32_to_cpup(p
++);
1351 dummy
= be32_to_cpup(p
++);
1353 p
+= XDR_QUADLEN(dummy
);
1357 dummy
= be32_to_cpup(p
++);
1359 p
+= XDR_QUADLEN(dummy
);
1369 nfsd4_decode_create_session(struct nfsd4_compoundargs
*argp
,
1370 struct nfsd4_create_session
*sess
)
1376 COPYMEM(&sess
->clientid
, 8);
1377 sess
->seqid
= be32_to_cpup(p
++);
1378 sess
->flags
= be32_to_cpup(p
++);
1380 /* Fore channel attrs */
1382 dummy
= be32_to_cpup(p
++); /* headerpadsz is always 0 */
1383 sess
->fore_channel
.maxreq_sz
= be32_to_cpup(p
++);
1384 sess
->fore_channel
.maxresp_sz
= be32_to_cpup(p
++);
1385 sess
->fore_channel
.maxresp_cached
= be32_to_cpup(p
++);
1386 sess
->fore_channel
.maxops
= be32_to_cpup(p
++);
1387 sess
->fore_channel
.maxreqs
= be32_to_cpup(p
++);
1388 sess
->fore_channel
.nr_rdma_attrs
= be32_to_cpup(p
++);
1389 if (sess
->fore_channel
.nr_rdma_attrs
== 1) {
1391 sess
->fore_channel
.rdma_attrs
= be32_to_cpup(p
++);
1392 } else if (sess
->fore_channel
.nr_rdma_attrs
> 1) {
1393 dprintk("Too many fore channel attr bitmaps!\n");
1397 /* Back channel attrs */
1399 dummy
= be32_to_cpup(p
++); /* headerpadsz is always 0 */
1400 sess
->back_channel
.maxreq_sz
= be32_to_cpup(p
++);
1401 sess
->back_channel
.maxresp_sz
= be32_to_cpup(p
++);
1402 sess
->back_channel
.maxresp_cached
= be32_to_cpup(p
++);
1403 sess
->back_channel
.maxops
= be32_to_cpup(p
++);
1404 sess
->back_channel
.maxreqs
= be32_to_cpup(p
++);
1405 sess
->back_channel
.nr_rdma_attrs
= be32_to_cpup(p
++);
1406 if (sess
->back_channel
.nr_rdma_attrs
== 1) {
1408 sess
->back_channel
.rdma_attrs
= be32_to_cpup(p
++);
1409 } else if (sess
->back_channel
.nr_rdma_attrs
> 1) {
1410 dprintk("Too many back channel attr bitmaps!\n");
1415 sess
->callback_prog
= be32_to_cpup(p
++);
1416 nfsd4_decode_cb_sec(argp
, &sess
->cb_sec
);
1421 nfsd4_decode_destroy_session(struct nfsd4_compoundargs
*argp
,
1422 struct nfsd4_destroy_session
*destroy_session
)
1425 READ_BUF(NFS4_MAX_SESSIONID_LEN
);
1426 COPYMEM(destroy_session
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1432 nfsd4_decode_free_stateid(struct nfsd4_compoundargs
*argp
,
1433 struct nfsd4_free_stateid
*free_stateid
)
1437 READ_BUF(sizeof(stateid_t
));
1438 free_stateid
->fr_stateid
.si_generation
= be32_to_cpup(p
++);
1439 COPYMEM(&free_stateid
->fr_stateid
.si_opaque
, sizeof(stateid_opaque_t
));
1445 nfsd4_decode_sequence(struct nfsd4_compoundargs
*argp
,
1446 struct nfsd4_sequence
*seq
)
1450 READ_BUF(NFS4_MAX_SESSIONID_LEN
+ 16);
1451 COPYMEM(seq
->sessionid
.data
, NFS4_MAX_SESSIONID_LEN
);
1452 seq
->seqid
= be32_to_cpup(p
++);
1453 seq
->slotid
= be32_to_cpup(p
++);
1454 seq
->maxslots
= be32_to_cpup(p
++);
1455 seq
->cachethis
= be32_to_cpup(p
++);
1461 nfsd4_decode_test_stateid(struct nfsd4_compoundargs
*argp
, struct nfsd4_test_stateid
*test_stateid
)
1465 struct nfsd4_test_stateid_id
*stateid
;
1468 test_stateid
->ts_num_ids
= ntohl(*p
++);
1470 INIT_LIST_HEAD(&test_stateid
->ts_stateid_list
);
1472 for (i
= 0; i
< test_stateid
->ts_num_ids
; i
++) {
1473 stateid
= svcxdr_tmpalloc(argp
, sizeof(*stateid
));
1475 status
= nfserrno(-ENOMEM
);
1479 INIT_LIST_HEAD(&stateid
->ts_id_list
);
1480 list_add_tail(&stateid
->ts_id_list
, &test_stateid
->ts_stateid_list
);
1482 status
= nfsd4_decode_stateid(argp
, &stateid
->ts_id_stateid
);
1491 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__
, __LINE__
);
1492 status
= nfserr_bad_xdr
;
1496 static __be32
nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs
*argp
, struct nfsd4_destroy_clientid
*dc
)
1501 COPYMEM(&dc
->clientid
, 8);
1506 static __be32
nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs
*argp
, struct nfsd4_reclaim_complete
*rc
)
1511 rc
->rca_one_fs
= be32_to_cpup(p
++);
1517 nfsd4_decode_seek(struct nfsd4_compoundargs
*argp
, struct nfsd4_seek
*seek
)
1521 status
= nfsd4_decode_stateid(argp
, &seek
->seek_stateid
);
1526 p
= xdr_decode_hyper(p
, &seek
->seek_offset
);
1527 seek
->seek_whence
= be32_to_cpup(p
);
1533 nfsd4_decode_noop(struct nfsd4_compoundargs
*argp
, void *p
)
1539 nfsd4_decode_notsupp(struct nfsd4_compoundargs
*argp
, void *p
)
1541 return nfserr_notsupp
;
1544 typedef __be32(*nfsd4_dec
)(struct nfsd4_compoundargs
*argp
, void *);
1546 static nfsd4_dec nfsd4_dec_ops
[] = {
1547 [OP_ACCESS
] = (nfsd4_dec
)nfsd4_decode_access
,
1548 [OP_CLOSE
] = (nfsd4_dec
)nfsd4_decode_close
,
1549 [OP_COMMIT
] = (nfsd4_dec
)nfsd4_decode_commit
,
1550 [OP_CREATE
] = (nfsd4_dec
)nfsd4_decode_create
,
1551 [OP_DELEGPURGE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1552 [OP_DELEGRETURN
] = (nfsd4_dec
)nfsd4_decode_delegreturn
,
1553 [OP_GETATTR
] = (nfsd4_dec
)nfsd4_decode_getattr
,
1554 [OP_GETFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1555 [OP_LINK
] = (nfsd4_dec
)nfsd4_decode_link
,
1556 [OP_LOCK
] = (nfsd4_dec
)nfsd4_decode_lock
,
1557 [OP_LOCKT
] = (nfsd4_dec
)nfsd4_decode_lockt
,
1558 [OP_LOCKU
] = (nfsd4_dec
)nfsd4_decode_locku
,
1559 [OP_LOOKUP
] = (nfsd4_dec
)nfsd4_decode_lookup
,
1560 [OP_LOOKUPP
] = (nfsd4_dec
)nfsd4_decode_noop
,
1561 [OP_NVERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1562 [OP_OPEN
] = (nfsd4_dec
)nfsd4_decode_open
,
1563 [OP_OPENATTR
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1564 [OP_OPEN_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_open_confirm
,
1565 [OP_OPEN_DOWNGRADE
] = (nfsd4_dec
)nfsd4_decode_open_downgrade
,
1566 [OP_PUTFH
] = (nfsd4_dec
)nfsd4_decode_putfh
,
1567 [OP_PUTPUBFH
] = (nfsd4_dec
)nfsd4_decode_putpubfh
,
1568 [OP_PUTROOTFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1569 [OP_READ
] = (nfsd4_dec
)nfsd4_decode_read
,
1570 [OP_READDIR
] = (nfsd4_dec
)nfsd4_decode_readdir
,
1571 [OP_READLINK
] = (nfsd4_dec
)nfsd4_decode_noop
,
1572 [OP_REMOVE
] = (nfsd4_dec
)nfsd4_decode_remove
,
1573 [OP_RENAME
] = (nfsd4_dec
)nfsd4_decode_rename
,
1574 [OP_RENEW
] = (nfsd4_dec
)nfsd4_decode_renew
,
1575 [OP_RESTOREFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1576 [OP_SAVEFH
] = (nfsd4_dec
)nfsd4_decode_noop
,
1577 [OP_SECINFO
] = (nfsd4_dec
)nfsd4_decode_secinfo
,
1578 [OP_SETATTR
] = (nfsd4_dec
)nfsd4_decode_setattr
,
1579 [OP_SETCLIENTID
] = (nfsd4_dec
)nfsd4_decode_setclientid
,
1580 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_dec
)nfsd4_decode_setclientid_confirm
,
1581 [OP_VERIFY
] = (nfsd4_dec
)nfsd4_decode_verify
,
1582 [OP_WRITE
] = (nfsd4_dec
)nfsd4_decode_write
,
1583 [OP_RELEASE_LOCKOWNER
] = (nfsd4_dec
)nfsd4_decode_release_lockowner
,
1585 /* new operations for NFSv4.1 */
1586 [OP_BACKCHANNEL_CTL
] = (nfsd4_dec
)nfsd4_decode_backchannel_ctl
,
1587 [OP_BIND_CONN_TO_SESSION
]= (nfsd4_dec
)nfsd4_decode_bind_conn_to_session
,
1588 [OP_EXCHANGE_ID
] = (nfsd4_dec
)nfsd4_decode_exchange_id
,
1589 [OP_CREATE_SESSION
] = (nfsd4_dec
)nfsd4_decode_create_session
,
1590 [OP_DESTROY_SESSION
] = (nfsd4_dec
)nfsd4_decode_destroy_session
,
1591 [OP_FREE_STATEID
] = (nfsd4_dec
)nfsd4_decode_free_stateid
,
1592 [OP_GET_DIR_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1593 [OP_GETDEVICEINFO
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1594 [OP_GETDEVICELIST
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1595 [OP_LAYOUTCOMMIT
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1596 [OP_LAYOUTGET
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1597 [OP_LAYOUTRETURN
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1598 [OP_SECINFO_NO_NAME
] = (nfsd4_dec
)nfsd4_decode_secinfo_no_name
,
1599 [OP_SEQUENCE
] = (nfsd4_dec
)nfsd4_decode_sequence
,
1600 [OP_SET_SSV
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1601 [OP_TEST_STATEID
] = (nfsd4_dec
)nfsd4_decode_test_stateid
,
1602 [OP_WANT_DELEGATION
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1603 [OP_DESTROY_CLIENTID
] = (nfsd4_dec
)nfsd4_decode_destroy_clientid
,
1604 [OP_RECLAIM_COMPLETE
] = (nfsd4_dec
)nfsd4_decode_reclaim_complete
,
1606 /* new operations for NFSv4.2 */
1607 [OP_ALLOCATE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1608 [OP_COPY
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1609 [OP_COPY_NOTIFY
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1610 [OP_DEALLOCATE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1611 [OP_IO_ADVISE
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1612 [OP_LAYOUTERROR
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1613 [OP_LAYOUTSTATS
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1614 [OP_OFFLOAD_CANCEL
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1615 [OP_OFFLOAD_STATUS
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1616 [OP_READ_PLUS
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1617 [OP_SEEK
] = (nfsd4_dec
)nfsd4_decode_seek
,
1618 [OP_WRITE_SAME
] = (nfsd4_dec
)nfsd4_decode_notsupp
,
1622 nfsd4_opnum_in_range(struct nfsd4_compoundargs
*argp
, struct nfsd4_op
*op
)
1624 if (op
->opnum
< FIRST_NFS4_OP
)
1626 else if (argp
->minorversion
== 0 && op
->opnum
> LAST_NFS40_OP
)
1628 else if (argp
->minorversion
== 1 && op
->opnum
> LAST_NFS41_OP
)
1630 else if (argp
->minorversion
== 2 && op
->opnum
> LAST_NFS42_OP
)
1636 nfsd4_decode_compound(struct nfsd4_compoundargs
*argp
)
1639 struct nfsd4_op
*op
;
1640 bool cachethis
= false;
1641 int auth_slack
= argp
->rqstp
->rq_auth_slack
;
1642 int max_reply
= auth_slack
+ 8; /* opcnt, status */
1648 argp
->taglen
= be32_to_cpup(p
++);
1649 READ_BUF(argp
->taglen
+ 8);
1650 SAVEMEM(argp
->tag
, argp
->taglen
);
1651 argp
->minorversion
= be32_to_cpup(p
++);
1652 argp
->opcnt
= be32_to_cpup(p
++);
1653 max_reply
+= 4 + (XDR_QUADLEN(argp
->taglen
) << 2);
1655 if (argp
->taglen
> NFSD4_MAX_TAGLEN
)
1657 if (argp
->opcnt
> 100)
1660 if (argp
->opcnt
> ARRAY_SIZE(argp
->iops
)) {
1661 argp
->ops
= kzalloc(argp
->opcnt
* sizeof(*argp
->ops
), GFP_KERNEL
);
1663 argp
->ops
= argp
->iops
;
1664 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1669 if (argp
->minorversion
> NFSD_SUPPORTED_MINOR_VERSION
)
1672 for (i
= 0; i
< argp
->opcnt
; i
++) {
1677 op
->opnum
= be32_to_cpup(p
++);
1679 if (nfsd4_opnum_in_range(argp
, op
))
1680 op
->status
= nfsd4_dec_ops
[op
->opnum
](argp
, &op
->u
);
1682 op
->opnum
= OP_ILLEGAL
;
1683 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 if (op
->opnum
== OP_READ
) {
1693 readbytes
+= nfsd4_max_reply(argp
->rqstp
, op
);
1695 max_reply
+= nfsd4_max_reply(argp
->rqstp
, op
);
1697 * OP_LOCK may return a conflicting lock. (Special case
1698 * because it will just skip encoding this if it runs
1699 * out of xdr buffer space, and it is the only operation
1700 * that behaves this way.)
1702 if (op
->opnum
== OP_LOCK
)
1703 max_reply
+= NFS4_OPAQUE_LIMIT
;
1710 /* Sessions make the DRC unnecessary: */
1711 if (argp
->minorversion
)
1713 svc_reserve(argp
->rqstp
, max_reply
+ readbytes
);
1714 argp
->rqstp
->rq_cachetype
= cachethis
? RC_REPLBUFF
: RC_NOCACHE
;
1716 if (readcount
> 1 || max_reply
> PAGE_SIZE
- auth_slack
)
1717 argp
->rqstp
->rq_splice_ok
= false;
1722 static __be32
*encode_change(__be32
*p
, struct kstat
*stat
, struct inode
*inode
)
1724 if (IS_I_VERSION(inode
)) {
1725 p
= xdr_encode_hyper(p
, inode
->i_version
);
1727 *p
++ = cpu_to_be32(stat
->ctime
.tv_sec
);
1728 *p
++ = cpu_to_be32(stat
->ctime
.tv_nsec
);
1733 static __be32
*encode_cinfo(__be32
*p
, struct nfsd4_change_info
*c
)
1735 *p
++ = cpu_to_be32(c
->atomic
);
1736 if (c
->change_supported
) {
1737 p
= xdr_encode_hyper(p
, c
->before_change
);
1738 p
= xdr_encode_hyper(p
, c
->after_change
);
1740 *p
++ = cpu_to_be32(c
->before_ctime_sec
);
1741 *p
++ = cpu_to_be32(c
->before_ctime_nsec
);
1742 *p
++ = cpu_to_be32(c
->after_ctime_sec
);
1743 *p
++ = cpu_to_be32(c
->after_ctime_nsec
);
1748 /* Encode as an array of strings the string given with components
1749 * separated @sep, escaped with esc_enter and esc_exit.
1751 static __be32
nfsd4_encode_components_esc(struct xdr_stream
*xdr
, char sep
,
1752 char *components
, char esc_enter
,
1758 int strlen
, count
=0;
1759 char *str
, *end
, *next
;
1761 dprintk("nfsd4_encode_components(%s)\n", components
);
1763 pathlen_offset
= xdr
->buf
->len
;
1764 p
= xdr_reserve_space(xdr
, 4);
1766 return nfserr_resource
;
1767 p
++; /* We will fill this in with @count later */
1769 end
= str
= components
;
1771 bool found_esc
= false;
1773 /* try to parse as esc_start, ..., esc_end, sep */
1774 if (*str
== esc_enter
) {
1775 for (; *end
&& (*end
!= esc_exit
); end
++)
1776 /* find esc_exit or end of string */;
1778 if (*end
&& (!*next
|| *next
== sep
)) {
1785 for (; *end
&& (*end
!= sep
); end
++)
1786 /* find sep or end of string */;
1790 p
= xdr_reserve_space(xdr
, strlen
+ 4);
1792 return nfserr_resource
;
1793 p
= xdr_encode_opaque(p
, str
, strlen
);
1800 pathlen
= htonl(xdr
->buf
->len
- pathlen_offset
);
1801 write_bytes_to_xdr_buf(xdr
->buf
, pathlen_offset
, &pathlen
, 4);
1805 /* Encode as an array of strings the string given with components
1808 static __be32
nfsd4_encode_components(struct xdr_stream
*xdr
, char sep
,
1811 return nfsd4_encode_components_esc(xdr
, sep
, components
, 0, 0);
1815 * encode a location element of a fs_locations structure
1817 static __be32
nfsd4_encode_fs_location4(struct xdr_stream
*xdr
,
1818 struct nfsd4_fs_location
*location
)
1822 status
= nfsd4_encode_components_esc(xdr
, ':', location
->hosts
,
1826 status
= nfsd4_encode_components(xdr
, '/', location
->path
);
1833 * Encode a path in RFC3530 'pathname4' format
1835 static __be32
nfsd4_encode_path(struct xdr_stream
*xdr
,
1836 const struct path
*root
,
1837 const struct path
*path
)
1839 struct path cur
= *path
;
1841 struct dentry
**components
= NULL
;
1842 unsigned int ncomponents
= 0;
1843 __be32 err
= nfserr_jukebox
;
1845 dprintk("nfsd4_encode_components(");
1848 /* First walk the path up to the nfsd root, and store the
1849 * dentries/path components in an array.
1852 if (cur
.dentry
== root
->dentry
&& cur
.mnt
== root
->mnt
)
1854 if (cur
.dentry
== cur
.mnt
->mnt_root
) {
1855 if (follow_up(&cur
))
1859 if ((ncomponents
& 15) == 0) {
1860 struct dentry
**new;
1861 new = krealloc(components
,
1862 sizeof(*new) * (ncomponents
+ 16),
1868 components
[ncomponents
++] = cur
.dentry
;
1869 cur
.dentry
= dget_parent(cur
.dentry
);
1871 err
= nfserr_resource
;
1872 p
= xdr_reserve_space(xdr
, 4);
1875 *p
++ = cpu_to_be32(ncomponents
);
1877 while (ncomponents
) {
1878 struct dentry
*dentry
= components
[ncomponents
- 1];
1881 spin_lock(&dentry
->d_lock
);
1882 len
= dentry
->d_name
.len
;
1883 p
= xdr_reserve_space(xdr
, len
+ 4);
1885 spin_unlock(&dentry
->d_lock
);
1888 p
= xdr_encode_opaque(p
, dentry
->d_name
.name
, len
);
1889 dprintk("/%pd", dentry
);
1890 spin_unlock(&dentry
->d_lock
);
1899 dput(components
[--ncomponents
]);
1905 static __be32
nfsd4_encode_fsloc_fsroot(struct xdr_stream
*xdr
,
1906 struct svc_rqst
*rqstp
, const struct path
*path
)
1908 struct svc_export
*exp_ps
;
1911 exp_ps
= rqst_find_fsidzero_export(rqstp
);
1913 return nfserrno(PTR_ERR(exp_ps
));
1914 res
= nfsd4_encode_path(xdr
, &exp_ps
->ex_path
, path
);
1920 * encode a fs_locations structure
1922 static __be32
nfsd4_encode_fs_locations(struct xdr_stream
*xdr
,
1923 struct svc_rqst
*rqstp
, struct svc_export
*exp
)
1928 struct nfsd4_fs_locations
*fslocs
= &exp
->ex_fslocs
;
1930 status
= nfsd4_encode_fsloc_fsroot(xdr
, rqstp
, &exp
->ex_path
);
1933 p
= xdr_reserve_space(xdr
, 4);
1935 return nfserr_resource
;
1936 *p
++ = cpu_to_be32(fslocs
->locations_count
);
1937 for (i
=0; i
<fslocs
->locations_count
; i
++) {
1938 status
= nfsd4_encode_fs_location4(xdr
, &fslocs
->locations
[i
]);
1945 static u32
nfs4_file_type(umode_t mode
)
1947 switch (mode
& S_IFMT
) {
1948 case S_IFIFO
: return NF4FIFO
;
1949 case S_IFCHR
: return NF4CHR
;
1950 case S_IFDIR
: return NF4DIR
;
1951 case S_IFBLK
: return NF4BLK
;
1952 case S_IFLNK
: return NF4LNK
;
1953 case S_IFREG
: return NF4REG
;
1954 case S_IFSOCK
: return NF4SOCK
;
1955 default: return NF4BAD
;
1959 static inline __be32
1960 nfsd4_encode_aclname(struct xdr_stream
*xdr
, struct svc_rqst
*rqstp
,
1961 struct nfs4_ace
*ace
)
1963 if (ace
->whotype
!= NFS4_ACL_WHO_NAMED
)
1964 return nfs4_acl_write_who(xdr
, ace
->whotype
);
1965 else if (ace
->flag
& NFS4_ACE_IDENTIFIER_GROUP
)
1966 return nfsd4_encode_group(xdr
, rqstp
, ace
->who_gid
);
1968 return nfsd4_encode_user(xdr
, rqstp
, ace
->who_uid
);
1971 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1972 FATTR4_WORD0_RDATTR_ERROR)
1973 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1975 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1976 static inline __be32
1977 nfsd4_encode_security_label(struct xdr_stream
*xdr
, struct svc_rqst
*rqstp
,
1978 void *context
, int len
)
1982 p
= xdr_reserve_space(xdr
, len
+ 4 + 4 + 4);
1984 return nfserr_resource
;
1987 * For now we use a 0 here to indicate the null translation; in
1988 * the future we may place a call to translation code here.
1990 *p
++ = cpu_to_be32(0); /* lfs */
1991 *p
++ = cpu_to_be32(0); /* pi */
1992 p
= xdr_encode_opaque(p
, context
, len
);
1996 static inline __be32
1997 nfsd4_encode_security_label(struct xdr_stream
*xdr
, struct svc_rqst
*rqstp
,
1998 void *context
, int len
)
2002 static __be32
fattr_handle_absent_fs(u32
*bmval0
, u32
*bmval1
, u32
*rdattr_err
)
2004 /* As per referral draft: */
2005 if (*bmval0
& ~WORD0_ABSENT_FS_ATTRS
||
2006 *bmval1
& ~WORD1_ABSENT_FS_ATTRS
) {
2007 if (*bmval0
& FATTR4_WORD0_RDATTR_ERROR
||
2008 *bmval0
& FATTR4_WORD0_FS_LOCATIONS
)
2009 *rdattr_err
= NFSERR_MOVED
;
2011 return nfserr_moved
;
2013 *bmval0
&= WORD0_ABSENT_FS_ATTRS
;
2014 *bmval1
&= WORD1_ABSENT_FS_ATTRS
;
2019 static int get_parent_attributes(struct svc_export
*exp
, struct kstat
*stat
)
2021 struct path path
= exp
->ex_path
;
2025 while (follow_up(&path
)) {
2026 if (path
.dentry
!= path
.mnt
->mnt_root
)
2029 err
= vfs_getattr(&path
, stat
);
2035 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2039 nfsd4_encode_fattr(struct xdr_stream
*xdr
, struct svc_fh
*fhp
,
2040 struct svc_export
*exp
,
2041 struct dentry
*dentry
, u32
*bmval
,
2042 struct svc_rqst
*rqstp
, int ignore_crossmnt
)
2044 u32 bmval0
= bmval
[0];
2045 u32 bmval1
= bmval
[1];
2046 u32 bmval2
= bmval
[2];
2048 struct svc_fh
*tempfh
= NULL
;
2049 struct kstatfs statfs
;
2051 int starting_len
= xdr
->buf
->len
;
2060 struct nfs4_acl
*acl
= NULL
;
2061 void *context
= NULL
;
2063 bool contextsupport
= false;
2064 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2065 u32 minorversion
= resp
->cstate
.minorversion
;
2066 struct path path
= {
2067 .mnt
= exp
->ex_path
.mnt
,
2070 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2072 BUG_ON(bmval1
& NFSD_WRITEONLY_ATTRS_WORD1
);
2073 BUG_ON(bmval0
& ~nfsd_suppattrs0(minorversion
));
2074 BUG_ON(bmval1
& ~nfsd_suppattrs1(minorversion
));
2075 BUG_ON(bmval2
& ~nfsd_suppattrs2(minorversion
));
2077 if (exp
->ex_fslocs
.migrated
) {
2079 status
= fattr_handle_absent_fs(&bmval0
, &bmval1
, &rdattr_err
);
2084 err
= vfs_getattr(&path
, &stat
);
2087 if ((bmval0
& (FATTR4_WORD0_FILES_AVAIL
| FATTR4_WORD0_FILES_FREE
|
2088 FATTR4_WORD0_FILES_TOTAL
| FATTR4_WORD0_MAXNAME
)) ||
2089 (bmval1
& (FATTR4_WORD1_SPACE_AVAIL
| FATTR4_WORD1_SPACE_FREE
|
2090 FATTR4_WORD1_SPACE_TOTAL
))) {
2091 err
= vfs_statfs(&path
, &statfs
);
2095 if ((bmval0
& (FATTR4_WORD0_FILEHANDLE
| FATTR4_WORD0_FSID
)) && !fhp
) {
2096 tempfh
= kmalloc(sizeof(struct svc_fh
), GFP_KERNEL
);
2097 status
= nfserr_jukebox
;
2100 fh_init(tempfh
, NFS4_FHSIZE
);
2101 status
= fh_compose(tempfh
, exp
, dentry
, NULL
);
2106 if (bmval0
& (FATTR4_WORD0_ACL
| FATTR4_WORD0_ACLSUPPORT
2107 | FATTR4_WORD0_SUPPORTED_ATTRS
)) {
2108 err
= nfsd4_get_nfs4_acl(rqstp
, dentry
, &acl
);
2109 aclsupport
= (err
== 0);
2110 if (bmval0
& FATTR4_WORD0_ACL
) {
2111 if (err
== -EOPNOTSUPP
)
2112 bmval0
&= ~FATTR4_WORD0_ACL
;
2113 else if (err
== -EINVAL
) {
2114 status
= nfserr_attrnotsupp
;
2116 } else if (err
!= 0)
2121 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2122 if ((bmval
[2] & FATTR4_WORD2_SECURITY_LABEL
) ||
2123 bmval
[0] & FATTR4_WORD0_SUPPORTED_ATTRS
) {
2124 err
= security_inode_getsecctx(dentry
->d_inode
,
2125 &context
, &contextlen
);
2126 contextsupport
= (err
== 0);
2127 if (bmval2
& FATTR4_WORD2_SECURITY_LABEL
) {
2128 if (err
== -EOPNOTSUPP
)
2129 bmval2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
2134 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2137 p
= xdr_reserve_space(xdr
, 16);
2140 *p
++ = cpu_to_be32(3);
2141 *p
++ = cpu_to_be32(bmval0
);
2142 *p
++ = cpu_to_be32(bmval1
);
2143 *p
++ = cpu_to_be32(bmval2
);
2144 } else if (bmval1
) {
2145 p
= xdr_reserve_space(xdr
, 12);
2148 *p
++ = cpu_to_be32(2);
2149 *p
++ = cpu_to_be32(bmval0
);
2150 *p
++ = cpu_to_be32(bmval1
);
2152 p
= xdr_reserve_space(xdr
, 8);
2155 *p
++ = cpu_to_be32(1);
2156 *p
++ = cpu_to_be32(bmval0
);
2159 attrlen_offset
= xdr
->buf
->len
;
2160 p
= xdr_reserve_space(xdr
, 4);
2163 p
++; /* to be backfilled later */
2165 if (bmval0
& FATTR4_WORD0_SUPPORTED_ATTRS
) {
2166 u32 word0
= nfsd_suppattrs0(minorversion
);
2167 u32 word1
= nfsd_suppattrs1(minorversion
);
2168 u32 word2
= nfsd_suppattrs2(minorversion
);
2171 word0
&= ~FATTR4_WORD0_ACL
;
2172 if (!contextsupport
)
2173 word2
&= ~FATTR4_WORD2_SECURITY_LABEL
;
2175 p
= xdr_reserve_space(xdr
, 12);
2178 *p
++ = cpu_to_be32(2);
2179 *p
++ = cpu_to_be32(word0
);
2180 *p
++ = cpu_to_be32(word1
);
2182 p
= xdr_reserve_space(xdr
, 16);
2185 *p
++ = cpu_to_be32(3);
2186 *p
++ = cpu_to_be32(word0
);
2187 *p
++ = cpu_to_be32(word1
);
2188 *p
++ = cpu_to_be32(word2
);
2191 if (bmval0
& FATTR4_WORD0_TYPE
) {
2192 p
= xdr_reserve_space(xdr
, 4);
2195 dummy
= nfs4_file_type(stat
.mode
);
2196 if (dummy
== NF4BAD
) {
2197 status
= nfserr_serverfault
;
2200 *p
++ = cpu_to_be32(dummy
);
2202 if (bmval0
& FATTR4_WORD0_FH_EXPIRE_TYPE
) {
2203 p
= xdr_reserve_space(xdr
, 4);
2206 if (exp
->ex_flags
& NFSEXP_NOSUBTREECHECK
)
2207 *p
++ = cpu_to_be32(NFS4_FH_PERSISTENT
);
2209 *p
++ = cpu_to_be32(NFS4_FH_PERSISTENT
|
2210 NFS4_FH_VOL_RENAME
);
2212 if (bmval0
& FATTR4_WORD0_CHANGE
) {
2213 p
= xdr_reserve_space(xdr
, 8);
2216 p
= encode_change(p
, &stat
, dentry
->d_inode
);
2218 if (bmval0
& FATTR4_WORD0_SIZE
) {
2219 p
= xdr_reserve_space(xdr
, 8);
2222 p
= xdr_encode_hyper(p
, stat
.size
);
2224 if (bmval0
& FATTR4_WORD0_LINK_SUPPORT
) {
2225 p
= xdr_reserve_space(xdr
, 4);
2228 *p
++ = cpu_to_be32(1);
2230 if (bmval0
& FATTR4_WORD0_SYMLINK_SUPPORT
) {
2231 p
= xdr_reserve_space(xdr
, 4);
2234 *p
++ = cpu_to_be32(1);
2236 if (bmval0
& FATTR4_WORD0_NAMED_ATTR
) {
2237 p
= xdr_reserve_space(xdr
, 4);
2240 *p
++ = cpu_to_be32(0);
2242 if (bmval0
& FATTR4_WORD0_FSID
) {
2243 p
= xdr_reserve_space(xdr
, 16);
2246 if (exp
->ex_fslocs
.migrated
) {
2247 p
= xdr_encode_hyper(p
, NFS4_REFERRAL_FSID_MAJOR
);
2248 p
= xdr_encode_hyper(p
, NFS4_REFERRAL_FSID_MINOR
);
2249 } else switch(fsid_source(fhp
)) {
2250 case FSIDSOURCE_FSID
:
2251 p
= xdr_encode_hyper(p
, (u64
)exp
->ex_fsid
);
2252 p
= xdr_encode_hyper(p
, (u64
)0);
2254 case FSIDSOURCE_DEV
:
2255 *p
++ = cpu_to_be32(0);
2256 *p
++ = cpu_to_be32(MAJOR(stat
.dev
));
2257 *p
++ = cpu_to_be32(0);
2258 *p
++ = cpu_to_be32(MINOR(stat
.dev
));
2260 case FSIDSOURCE_UUID
:
2261 p
= xdr_encode_opaque_fixed(p
, exp
->ex_uuid
,
2266 if (bmval0
& FATTR4_WORD0_UNIQUE_HANDLES
) {
2267 p
= xdr_reserve_space(xdr
, 4);
2270 *p
++ = cpu_to_be32(0);
2272 if (bmval0
& FATTR4_WORD0_LEASE_TIME
) {
2273 p
= xdr_reserve_space(xdr
, 4);
2276 *p
++ = cpu_to_be32(nn
->nfsd4_lease
);
2278 if (bmval0
& FATTR4_WORD0_RDATTR_ERROR
) {
2279 p
= xdr_reserve_space(xdr
, 4);
2282 *p
++ = cpu_to_be32(rdattr_err
);
2284 if (bmval0
& FATTR4_WORD0_ACL
) {
2285 struct nfs4_ace
*ace
;
2288 p
= xdr_reserve_space(xdr
, 4);
2292 *p
++ = cpu_to_be32(0);
2295 p
= xdr_reserve_space(xdr
, 4);
2298 *p
++ = cpu_to_be32(acl
->naces
);
2300 for (ace
= acl
->aces
; ace
< acl
->aces
+ acl
->naces
; ace
++) {
2301 p
= xdr_reserve_space(xdr
, 4*3);
2304 *p
++ = cpu_to_be32(ace
->type
);
2305 *p
++ = cpu_to_be32(ace
->flag
);
2306 *p
++ = cpu_to_be32(ace
->access_mask
&
2308 status
= nfsd4_encode_aclname(xdr
, rqstp
, ace
);
2314 if (bmval0
& FATTR4_WORD0_ACLSUPPORT
) {
2315 p
= xdr_reserve_space(xdr
, 4);
2318 *p
++ = cpu_to_be32(aclsupport
?
2319 ACL4_SUPPORT_ALLOW_ACL
|ACL4_SUPPORT_DENY_ACL
: 0);
2321 if (bmval0
& FATTR4_WORD0_CANSETTIME
) {
2322 p
= xdr_reserve_space(xdr
, 4);
2325 *p
++ = cpu_to_be32(1);
2327 if (bmval0
& FATTR4_WORD0_CASE_INSENSITIVE
) {
2328 p
= xdr_reserve_space(xdr
, 4);
2331 *p
++ = cpu_to_be32(0);
2333 if (bmval0
& FATTR4_WORD0_CASE_PRESERVING
) {
2334 p
= xdr_reserve_space(xdr
, 4);
2337 *p
++ = cpu_to_be32(1);
2339 if (bmval0
& FATTR4_WORD0_CHOWN_RESTRICTED
) {
2340 p
= xdr_reserve_space(xdr
, 4);
2343 *p
++ = cpu_to_be32(1);
2345 if (bmval0
& FATTR4_WORD0_FILEHANDLE
) {
2346 p
= xdr_reserve_space(xdr
, fhp
->fh_handle
.fh_size
+ 4);
2349 p
= xdr_encode_opaque(p
, &fhp
->fh_handle
.fh_base
,
2350 fhp
->fh_handle
.fh_size
);
2352 if (bmval0
& FATTR4_WORD0_FILEID
) {
2353 p
= xdr_reserve_space(xdr
, 8);
2356 p
= xdr_encode_hyper(p
, stat
.ino
);
2358 if (bmval0
& FATTR4_WORD0_FILES_AVAIL
) {
2359 p
= xdr_reserve_space(xdr
, 8);
2362 p
= xdr_encode_hyper(p
, (u64
) statfs
.f_ffree
);
2364 if (bmval0
& FATTR4_WORD0_FILES_FREE
) {
2365 p
= xdr_reserve_space(xdr
, 8);
2368 p
= xdr_encode_hyper(p
, (u64
) statfs
.f_ffree
);
2370 if (bmval0
& FATTR4_WORD0_FILES_TOTAL
) {
2371 p
= xdr_reserve_space(xdr
, 8);
2374 p
= xdr_encode_hyper(p
, (u64
) statfs
.f_files
);
2376 if (bmval0
& FATTR4_WORD0_FS_LOCATIONS
) {
2377 status
= nfsd4_encode_fs_locations(xdr
, rqstp
, exp
);
2381 if (bmval0
& FATTR4_WORD0_HOMOGENEOUS
) {
2382 p
= xdr_reserve_space(xdr
, 4);
2385 *p
++ = cpu_to_be32(1);
2387 if (bmval0
& FATTR4_WORD0_MAXFILESIZE
) {
2388 p
= xdr_reserve_space(xdr
, 8);
2391 p
= xdr_encode_hyper(p
, exp
->ex_path
.mnt
->mnt_sb
->s_maxbytes
);
2393 if (bmval0
& FATTR4_WORD0_MAXLINK
) {
2394 p
= xdr_reserve_space(xdr
, 4);
2397 *p
++ = cpu_to_be32(255);
2399 if (bmval0
& FATTR4_WORD0_MAXNAME
) {
2400 p
= xdr_reserve_space(xdr
, 4);
2403 *p
++ = cpu_to_be32(statfs
.f_namelen
);
2405 if (bmval0
& FATTR4_WORD0_MAXREAD
) {
2406 p
= xdr_reserve_space(xdr
, 8);
2409 p
= xdr_encode_hyper(p
, (u64
) svc_max_payload(rqstp
));
2411 if (bmval0
& FATTR4_WORD0_MAXWRITE
) {
2412 p
= xdr_reserve_space(xdr
, 8);
2415 p
= xdr_encode_hyper(p
, (u64
) svc_max_payload(rqstp
));
2417 if (bmval1
& FATTR4_WORD1_MODE
) {
2418 p
= xdr_reserve_space(xdr
, 4);
2421 *p
++ = cpu_to_be32(stat
.mode
& S_IALLUGO
);
2423 if (bmval1
& FATTR4_WORD1_NO_TRUNC
) {
2424 p
= xdr_reserve_space(xdr
, 4);
2427 *p
++ = cpu_to_be32(1);
2429 if (bmval1
& FATTR4_WORD1_NUMLINKS
) {
2430 p
= xdr_reserve_space(xdr
, 4);
2433 *p
++ = cpu_to_be32(stat
.nlink
);
2435 if (bmval1
& FATTR4_WORD1_OWNER
) {
2436 status
= nfsd4_encode_user(xdr
, rqstp
, stat
.uid
);
2440 if (bmval1
& FATTR4_WORD1_OWNER_GROUP
) {
2441 status
= nfsd4_encode_group(xdr
, rqstp
, stat
.gid
);
2445 if (bmval1
& FATTR4_WORD1_RAWDEV
) {
2446 p
= xdr_reserve_space(xdr
, 8);
2449 *p
++ = cpu_to_be32((u32
) MAJOR(stat
.rdev
));
2450 *p
++ = cpu_to_be32((u32
) MINOR(stat
.rdev
));
2452 if (bmval1
& FATTR4_WORD1_SPACE_AVAIL
) {
2453 p
= xdr_reserve_space(xdr
, 8);
2456 dummy64
= (u64
)statfs
.f_bavail
* (u64
)statfs
.f_bsize
;
2457 p
= xdr_encode_hyper(p
, dummy64
);
2459 if (bmval1
& FATTR4_WORD1_SPACE_FREE
) {
2460 p
= xdr_reserve_space(xdr
, 8);
2463 dummy64
= (u64
)statfs
.f_bfree
* (u64
)statfs
.f_bsize
;
2464 p
= xdr_encode_hyper(p
, dummy64
);
2466 if (bmval1
& FATTR4_WORD1_SPACE_TOTAL
) {
2467 p
= xdr_reserve_space(xdr
, 8);
2470 dummy64
= (u64
)statfs
.f_blocks
* (u64
)statfs
.f_bsize
;
2471 p
= xdr_encode_hyper(p
, dummy64
);
2473 if (bmval1
& FATTR4_WORD1_SPACE_USED
) {
2474 p
= xdr_reserve_space(xdr
, 8);
2477 dummy64
= (u64
)stat
.blocks
<< 9;
2478 p
= xdr_encode_hyper(p
, dummy64
);
2480 if (bmval1
& FATTR4_WORD1_TIME_ACCESS
) {
2481 p
= xdr_reserve_space(xdr
, 12);
2484 p
= xdr_encode_hyper(p
, (s64
)stat
.atime
.tv_sec
);
2485 *p
++ = cpu_to_be32(stat
.atime
.tv_nsec
);
2487 if (bmval1
& FATTR4_WORD1_TIME_DELTA
) {
2488 p
= xdr_reserve_space(xdr
, 12);
2491 *p
++ = cpu_to_be32(0);
2492 *p
++ = cpu_to_be32(1);
2493 *p
++ = cpu_to_be32(0);
2495 if (bmval1
& FATTR4_WORD1_TIME_METADATA
) {
2496 p
= xdr_reserve_space(xdr
, 12);
2499 p
= xdr_encode_hyper(p
, (s64
)stat
.ctime
.tv_sec
);
2500 *p
++ = cpu_to_be32(stat
.ctime
.tv_nsec
);
2502 if (bmval1
& FATTR4_WORD1_TIME_MODIFY
) {
2503 p
= xdr_reserve_space(xdr
, 12);
2506 p
= xdr_encode_hyper(p
, (s64
)stat
.mtime
.tv_sec
);
2507 *p
++ = cpu_to_be32(stat
.mtime
.tv_nsec
);
2509 if (bmval1
& FATTR4_WORD1_MOUNTED_ON_FILEID
) {
2510 p
= xdr_reserve_space(xdr
, 8);
2514 * Get parent's attributes if not ignoring crossmount
2515 * and this is the root of a cross-mounted filesystem.
2517 if (ignore_crossmnt
== 0 &&
2518 dentry
== exp
->ex_path
.mnt
->mnt_root
)
2519 get_parent_attributes(exp
, &stat
);
2520 p
= xdr_encode_hyper(p
, stat
.ino
);
2522 if (bmval2
& FATTR4_WORD2_SECURITY_LABEL
) {
2523 status
= nfsd4_encode_security_label(xdr
, rqstp
, context
,
2528 if (bmval2
& FATTR4_WORD2_SUPPATTR_EXCLCREAT
) {
2529 p
= xdr_reserve_space(xdr
, 16);
2532 *p
++ = cpu_to_be32(3);
2533 *p
++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0
);
2534 *p
++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1
);
2535 *p
++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2
);
2538 attrlen
= htonl(xdr
->buf
->len
- attrlen_offset
- 4);
2539 write_bytes_to_xdr_buf(xdr
->buf
, attrlen_offset
, &attrlen
, 4);
2543 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2545 security_release_secctx(context
, contextlen
);
2546 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2553 xdr_truncate_encode(xdr
, starting_len
);
2556 status
= nfserrno(err
);
2559 status
= nfserr_resource
;
2563 static void svcxdr_init_encode_from_buffer(struct xdr_stream
*xdr
,
2564 struct xdr_buf
*buf
, __be32
*p
, int bytes
)
2566 xdr
->scratch
.iov_len
= 0;
2567 memset(buf
, 0, sizeof(struct xdr_buf
));
2568 buf
->head
[0].iov_base
= p
;
2569 buf
->head
[0].iov_len
= 0;
2572 xdr
->iov
= buf
->head
;
2574 xdr
->end
= (void *)p
+ bytes
;
2575 buf
->buflen
= bytes
;
2578 __be32
nfsd4_encode_fattr_to_buf(__be32
**p
, int words
,
2579 struct svc_fh
*fhp
, struct svc_export
*exp
,
2580 struct dentry
*dentry
, u32
*bmval
,
2581 struct svc_rqst
*rqstp
, int ignore_crossmnt
)
2583 struct xdr_buf dummy
;
2584 struct xdr_stream xdr
;
2587 svcxdr_init_encode_from_buffer(&xdr
, &dummy
, *p
, words
<< 2);
2588 ret
= nfsd4_encode_fattr(&xdr
, fhp
, exp
, dentry
, bmval
, rqstp
,
2594 static inline int attributes_need_mount(u32
*bmval
)
2596 if (bmval
[0] & ~(FATTR4_WORD0_RDATTR_ERROR
| FATTR4_WORD0_LEASE_TIME
))
2598 if (bmval
[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID
)
2604 nfsd4_encode_dirent_fattr(struct xdr_stream
*xdr
, struct nfsd4_readdir
*cd
,
2605 const char *name
, int namlen
)
2607 struct svc_export
*exp
= cd
->rd_fhp
->fh_export
;
2608 struct dentry
*dentry
;
2610 int ignore_crossmnt
= 0;
2612 dentry
= lookup_one_len(name
, cd
->rd_fhp
->fh_dentry
, namlen
);
2614 return nfserrno(PTR_ERR(dentry
));
2615 if (!dentry
->d_inode
) {
2617 * nfsd_buffered_readdir drops the i_mutex between
2618 * readdir and calling this callback, leaving a window
2619 * where this directory entry could have gone away.
2622 return nfserr_noent
;
2627 * In the case of a mountpoint, the client may be asking for
2628 * attributes that are only properties of the underlying filesystem
2629 * as opposed to the cross-mounted file system. In such a case,
2630 * we will not follow the cross mount and will fill the attribtutes
2631 * directly from the mountpoint dentry.
2633 if (nfsd_mountpoint(dentry
, exp
)) {
2636 if (!(exp
->ex_flags
& NFSEXP_V4ROOT
)
2637 && !attributes_need_mount(cd
->rd_bmval
)) {
2638 ignore_crossmnt
= 1;
2642 * Why the heck aren't we just using nfsd_lookup??
2643 * Different "."/".." handling? Something else?
2644 * At least, add a comment here to explain....
2646 err
= nfsd_cross_mnt(cd
->rd_rqstp
, &dentry
, &exp
);
2648 nfserr
= nfserrno(err
);
2651 nfserr
= check_nfsd_access(exp
, cd
->rd_rqstp
);
2657 nfserr
= nfsd4_encode_fattr(xdr
, NULL
, exp
, dentry
, cd
->rd_bmval
,
2658 cd
->rd_rqstp
, ignore_crossmnt
);
2666 nfsd4_encode_rdattr_error(struct xdr_stream
*xdr
, __be32 nfserr
)
2670 p
= xdr_reserve_space(xdr
, 20);
2674 *p
++ = htonl(FATTR4_WORD0_RDATTR_ERROR
); /* bmval0 */
2675 *p
++ = htonl(0); /* bmval1 */
2677 *p
++ = htonl(4); /* attribute length */
2678 *p
++ = nfserr
; /* no htonl */
2683 nfsd4_encode_dirent(void *ccdv
, const char *name
, int namlen
,
2684 loff_t offset
, u64 ino
, unsigned int d_type
)
2686 struct readdir_cd
*ccd
= ccdv
;
2687 struct nfsd4_readdir
*cd
= container_of(ccd
, struct nfsd4_readdir
, common
);
2688 struct xdr_stream
*xdr
= cd
->xdr
;
2689 int start_offset
= xdr
->buf
->len
;
2691 u32 name_and_cookie
;
2693 __be32 nfserr
= nfserr_toosmall
;
2697 /* In nfsv4, "." and ".." never make it onto the wire.. */
2698 if (name
&& isdotent(name
, namlen
)) {
2699 cd
->common
.err
= nfs_ok
;
2703 if (cd
->cookie_offset
) {
2704 wire_offset
= cpu_to_be64(offset
);
2705 write_bytes_to_xdr_buf(xdr
->buf
, cd
->cookie_offset
,
2709 p
= xdr_reserve_space(xdr
, 4);
2712 *p
++ = xdr_one
; /* mark entry present */
2713 cookie_offset
= xdr
->buf
->len
;
2714 p
= xdr_reserve_space(xdr
, 3*4 + namlen
);
2717 p
= xdr_encode_hyper(p
, NFS_OFFSET_MAX
); /* offset of next entry */
2718 p
= xdr_encode_array(p
, name
, namlen
); /* name length & name */
2720 nfserr
= nfsd4_encode_dirent_fattr(xdr
, cd
, name
, namlen
);
2724 case nfserr_resource
:
2725 nfserr
= nfserr_toosmall
;
2728 xdr_truncate_encode(xdr
, start_offset
);
2732 * If the client requested the RDATTR_ERROR attribute,
2733 * we stuff the error code into this attribute
2734 * and continue. If this attribute was not requested,
2735 * then in accordance with the spec, we fail the
2736 * entire READDIR operation(!)
2738 if (!(cd
->rd_bmval
[0] & FATTR4_WORD0_RDATTR_ERROR
))
2740 p
= nfsd4_encode_rdattr_error(xdr
, nfserr
);
2742 nfserr
= nfserr_toosmall
;
2746 nfserr
= nfserr_toosmall
;
2747 entry_bytes
= xdr
->buf
->len
- start_offset
;
2748 if (entry_bytes
> cd
->rd_maxcount
)
2750 cd
->rd_maxcount
-= entry_bytes
;
2751 if (!cd
->rd_dircount
)
2754 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2755 * let's always let through the first entry, at least:
2757 name_and_cookie
= 4 * XDR_QUADLEN(namlen
) + 8;
2758 if (name_and_cookie
> cd
->rd_dircount
&& cd
->cookie_offset
)
2760 cd
->rd_dircount
-= min(cd
->rd_dircount
, name_and_cookie
);
2761 cd
->cookie_offset
= cookie_offset
;
2763 cd
->common
.err
= nfs_ok
;
2766 xdr_truncate_encode(xdr
, start_offset
);
2767 cd
->common
.err
= nfserr
;
2772 nfsd4_encode_stateid(struct xdr_stream
*xdr
, stateid_t
*sid
)
2776 p
= xdr_reserve_space(xdr
, sizeof(stateid_t
));
2778 return nfserr_resource
;
2779 *p
++ = cpu_to_be32(sid
->si_generation
);
2780 p
= xdr_encode_opaque_fixed(p
, &sid
->si_opaque
,
2781 sizeof(stateid_opaque_t
));
2786 nfsd4_encode_access(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_access
*access
)
2788 struct xdr_stream
*xdr
= &resp
->xdr
;
2792 p
= xdr_reserve_space(xdr
, 8);
2794 return nfserr_resource
;
2795 *p
++ = cpu_to_be32(access
->ac_supported
);
2796 *p
++ = cpu_to_be32(access
->ac_resp_access
);
2801 static __be32
nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_bind_conn_to_session
*bcts
)
2803 struct xdr_stream
*xdr
= &resp
->xdr
;
2807 p
= xdr_reserve_space(xdr
, NFS4_MAX_SESSIONID_LEN
+ 8);
2809 return nfserr_resource
;
2810 p
= xdr_encode_opaque_fixed(p
, bcts
->sessionid
.data
,
2811 NFS4_MAX_SESSIONID_LEN
);
2812 *p
++ = cpu_to_be32(bcts
->dir
);
2813 /* Sorry, we do not yet support RDMA over 4.1: */
2814 *p
++ = cpu_to_be32(0);
2820 nfsd4_encode_close(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_close
*close
)
2822 struct xdr_stream
*xdr
= &resp
->xdr
;
2825 nfserr
= nfsd4_encode_stateid(xdr
, &close
->cl_stateid
);
2832 nfsd4_encode_commit(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_commit
*commit
)
2834 struct xdr_stream
*xdr
= &resp
->xdr
;
2838 p
= xdr_reserve_space(xdr
, NFS4_VERIFIER_SIZE
);
2840 return nfserr_resource
;
2841 p
= xdr_encode_opaque_fixed(p
, commit
->co_verf
.data
,
2842 NFS4_VERIFIER_SIZE
);
2848 nfsd4_encode_create(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_create
*create
)
2850 struct xdr_stream
*xdr
= &resp
->xdr
;
2854 p
= xdr_reserve_space(xdr
, 32);
2856 return nfserr_resource
;
2857 p
= encode_cinfo(p
, &create
->cr_cinfo
);
2858 *p
++ = cpu_to_be32(2);
2859 *p
++ = cpu_to_be32(create
->cr_bmval
[0]);
2860 *p
++ = cpu_to_be32(create
->cr_bmval
[1]);
2866 nfsd4_encode_getattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_getattr
*getattr
)
2868 struct svc_fh
*fhp
= getattr
->ga_fhp
;
2869 struct xdr_stream
*xdr
= &resp
->xdr
;
2874 nfserr
= nfsd4_encode_fattr(xdr
, fhp
, fhp
->fh_export
, fhp
->fh_dentry
,
2881 nfsd4_encode_getfh(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct svc_fh
**fhpp
)
2883 struct xdr_stream
*xdr
= &resp
->xdr
;
2884 struct svc_fh
*fhp
= *fhpp
;
2889 len
= fhp
->fh_handle
.fh_size
;
2890 p
= xdr_reserve_space(xdr
, len
+ 4);
2892 return nfserr_resource
;
2893 p
= xdr_encode_opaque(p
, &fhp
->fh_handle
.fh_base
, len
);
2899 * Including all fields other than the name, a LOCK4denied structure requires
2900 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2903 nfsd4_encode_lock_denied(struct xdr_stream
*xdr
, struct nfsd4_lock_denied
*ld
)
2905 struct xdr_netobj
*conf
= &ld
->ld_owner
;
2909 p
= xdr_reserve_space(xdr
, 32 + XDR_LEN(conf
->len
));
2912 * Don't fail to return the result just because we can't
2913 * return the conflicting open:
2921 return nfserr_resource
;
2923 p
= xdr_encode_hyper(p
, ld
->ld_start
);
2924 p
= xdr_encode_hyper(p
, ld
->ld_length
);
2925 *p
++ = cpu_to_be32(ld
->ld_type
);
2927 p
= xdr_encode_opaque_fixed(p
, &ld
->ld_clientid
, 8);
2928 p
= xdr_encode_opaque(p
, conf
->data
, conf
->len
);
2930 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2931 p
= xdr_encode_hyper(p
, (u64
)0); /* clientid */
2932 *p
++ = cpu_to_be32(0); /* length of owner name */
2934 return nfserr_denied
;
2938 nfsd4_encode_lock(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lock
*lock
)
2940 struct xdr_stream
*xdr
= &resp
->xdr
;
2943 nfserr
= nfsd4_encode_stateid(xdr
, &lock
->lk_resp_stateid
);
2944 else if (nfserr
== nfserr_denied
)
2945 nfserr
= nfsd4_encode_lock_denied(xdr
, &lock
->lk_denied
);
2951 nfsd4_encode_lockt(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_lockt
*lockt
)
2953 struct xdr_stream
*xdr
= &resp
->xdr
;
2955 if (nfserr
== nfserr_denied
)
2956 nfsd4_encode_lock_denied(xdr
, &lockt
->lt_denied
);
2961 nfsd4_encode_locku(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_locku
*locku
)
2963 struct xdr_stream
*xdr
= &resp
->xdr
;
2966 nfserr
= nfsd4_encode_stateid(xdr
, &locku
->lu_stateid
);
2973 nfsd4_encode_link(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_link
*link
)
2975 struct xdr_stream
*xdr
= &resp
->xdr
;
2979 p
= xdr_reserve_space(xdr
, 20);
2981 return nfserr_resource
;
2982 p
= encode_cinfo(p
, &link
->li_cinfo
);
2989 nfsd4_encode_open(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open
*open
)
2991 struct xdr_stream
*xdr
= &resp
->xdr
;
2997 nfserr
= nfsd4_encode_stateid(xdr
, &open
->op_stateid
);
3000 p
= xdr_reserve_space(xdr
, 40);
3002 return nfserr_resource
;
3003 p
= encode_cinfo(p
, &open
->op_cinfo
);
3004 *p
++ = cpu_to_be32(open
->op_rflags
);
3005 *p
++ = cpu_to_be32(2);
3006 *p
++ = cpu_to_be32(open
->op_bmval
[0]);
3007 *p
++ = cpu_to_be32(open
->op_bmval
[1]);
3008 *p
++ = cpu_to_be32(open
->op_delegate_type
);
3010 switch (open
->op_delegate_type
) {
3011 case NFS4_OPEN_DELEGATE_NONE
:
3013 case NFS4_OPEN_DELEGATE_READ
:
3014 nfserr
= nfsd4_encode_stateid(xdr
, &open
->op_delegate_stateid
);
3017 p
= xdr_reserve_space(xdr
, 20);
3019 return nfserr_resource
;
3020 *p
++ = cpu_to_be32(open
->op_recall
);
3023 * TODO: ACE's in delegations
3025 *p
++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
3026 *p
++ = cpu_to_be32(0);
3027 *p
++ = cpu_to_be32(0);
3028 *p
++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3030 case NFS4_OPEN_DELEGATE_WRITE
:
3031 nfserr
= nfsd4_encode_stateid(xdr
, &open
->op_delegate_stateid
);
3034 p
= xdr_reserve_space(xdr
, 32);
3036 return nfserr_resource
;
3037 *p
++ = cpu_to_be32(0);
3040 * TODO: space_limit's in delegations
3042 *p
++ = cpu_to_be32(NFS4_LIMIT_SIZE
);
3043 *p
++ = cpu_to_be32(~(u32
)0);
3044 *p
++ = cpu_to_be32(~(u32
)0);
3047 * TODO: ACE's in delegations
3049 *p
++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE
);
3050 *p
++ = cpu_to_be32(0);
3051 *p
++ = cpu_to_be32(0);
3052 *p
++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3054 case NFS4_OPEN_DELEGATE_NONE_EXT
: /* 4.1 */
3055 switch (open
->op_why_no_deleg
) {
3056 case WND4_CONTENTION
:
3058 p
= xdr_reserve_space(xdr
, 8);
3060 return nfserr_resource
;
3061 *p
++ = cpu_to_be32(open
->op_why_no_deleg
);
3062 /* deleg signaling not supported yet: */
3063 *p
++ = cpu_to_be32(0);
3066 p
= xdr_reserve_space(xdr
, 4);
3068 return nfserr_resource
;
3069 *p
++ = cpu_to_be32(open
->op_why_no_deleg
);
3075 /* XXX save filehandle here */
3081 nfsd4_encode_open_confirm(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_confirm
*oc
)
3083 struct xdr_stream
*xdr
= &resp
->xdr
;
3086 nfserr
= nfsd4_encode_stateid(xdr
, &oc
->oc_resp_stateid
);
3092 nfsd4_encode_open_downgrade(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_open_downgrade
*od
)
3094 struct xdr_stream
*xdr
= &resp
->xdr
;
3097 nfserr
= nfsd4_encode_stateid(xdr
, &od
->od_stateid
);
3102 static __be32
nfsd4_encode_splice_read(
3103 struct nfsd4_compoundres
*resp
,
3104 struct nfsd4_read
*read
,
3105 struct file
*file
, unsigned long maxcount
)
3107 struct xdr_stream
*xdr
= &resp
->xdr
;
3108 struct xdr_buf
*buf
= xdr
->buf
;
3112 __be32
*p
= xdr
->p
- 2;
3114 /* Make sure there will be room for padding if needed */
3115 if (xdr
->end
- xdr
->p
< 1)
3116 return nfserr_resource
;
3118 nfserr
= nfsd_splice_read(read
->rd_rqstp
, file
,
3119 read
->rd_offset
, &maxcount
);
3122 * nfsd_splice_actor may have already messed with the
3123 * page length; reset it so as not to confuse
3124 * xdr_truncate_encode:
3130 eof
= (read
->rd_offset
+ maxcount
>=
3131 read
->rd_fhp
->fh_dentry
->d_inode
->i_size
);
3133 *(p
++) = htonl(eof
);
3134 *(p
++) = htonl(maxcount
);
3136 buf
->page_len
= maxcount
;
3137 buf
->len
+= maxcount
;
3138 xdr
->page_ptr
+= (buf
->page_base
+ maxcount
+ PAGE_SIZE
- 1)
3141 /* Use rest of head for padding and remaining ops: */
3142 buf
->tail
[0].iov_base
= xdr
->p
;
3143 buf
->tail
[0].iov_len
= 0;
3144 xdr
->iov
= buf
->tail
;
3146 int pad
= 4 - (maxcount
&3);
3150 buf
->tail
[0].iov_base
+= maxcount
&3;
3151 buf
->tail
[0].iov_len
= pad
;
3155 space_left
= min_t(int, (void *)xdr
->end
- (void *)xdr
->p
,
3156 buf
->buflen
- buf
->len
);
3157 buf
->buflen
= buf
->len
+ space_left
;
3158 xdr
->end
= (__be32
*)((void *)xdr
->end
+ space_left
);
3163 static __be32
nfsd4_encode_readv(struct nfsd4_compoundres
*resp
,
3164 struct nfsd4_read
*read
,
3165 struct file
*file
, unsigned long maxcount
)
3167 struct xdr_stream
*xdr
= &resp
->xdr
;
3170 int starting_len
= xdr
->buf
->len
- 8;
3182 thislen
= min_t(long, len
, ((void *)xdr
->end
- (void *)xdr
->p
));
3183 p
= xdr_reserve_space(xdr
, (thislen
+3)&~3);
3185 resp
->rqstp
->rq_vec
[v
].iov_base
= p
;
3186 resp
->rqstp
->rq_vec
[v
].iov_len
= thislen
;
3191 thislen
= min_t(long, len
, PAGE_SIZE
);
3192 p
= xdr_reserve_space(xdr
, (thislen
+3)&~3);
3194 resp
->rqstp
->rq_vec
[v
].iov_base
= p
;
3195 resp
->rqstp
->rq_vec
[v
].iov_len
= thislen
;
3201 nfserr
= nfsd_readv(file
, read
->rd_offset
, resp
->rqstp
->rq_vec
,
3202 read
->rd_vlen
, &maxcount
);
3205 xdr_truncate_encode(xdr
, starting_len
+ 8 + ((maxcount
+3)&~3));
3207 eof
= (read
->rd_offset
+ maxcount
>=
3208 read
->rd_fhp
->fh_dentry
->d_inode
->i_size
);
3211 write_bytes_to_xdr_buf(xdr
->buf
, starting_len
, &tmp
, 4);
3212 tmp
= htonl(maxcount
);
3213 write_bytes_to_xdr_buf(xdr
->buf
, starting_len
+ 4, &tmp
, 4);
3215 pad
= (maxcount
&3) ? 4 - (maxcount
&3) : 0;
3216 write_bytes_to_xdr_buf(xdr
->buf
, starting_len
+ 8 + maxcount
,
3223 nfsd4_encode_read(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3224 struct nfsd4_read
*read
)
3226 unsigned long maxcount
;
3227 struct xdr_stream
*xdr
= &resp
->xdr
;
3228 struct file
*file
= read
->rd_filp
;
3229 int starting_len
= xdr
->buf
->len
;
3237 p
= xdr_reserve_space(xdr
, 8); /* eof flag and byte count */
3239 WARN_ON_ONCE(resp
->rqstp
->rq_splice_ok
);
3240 return nfserr_resource
;
3242 if (resp
->xdr
.buf
->page_len
&& resp
->rqstp
->rq_splice_ok
) {
3244 return nfserr_resource
;
3246 xdr_commit_encode(xdr
);
3248 maxcount
= svc_max_payload(resp
->rqstp
);
3249 maxcount
= min_t(unsigned long, maxcount
, (xdr
->buf
->buflen
- xdr
->buf
->len
));
3250 maxcount
= min_t(unsigned long, maxcount
, read
->rd_length
);
3252 if (!read
->rd_filp
) {
3253 err
= nfsd_get_tmp_read_open(resp
->rqstp
, read
->rd_fhp
,
3259 if (file
->f_op
->splice_read
&& resp
->rqstp
->rq_splice_ok
)
3260 err
= nfsd4_encode_splice_read(resp
, read
, file
, maxcount
);
3262 err
= nfsd4_encode_readv(resp
, read
, file
, maxcount
);
3265 nfsd_put_tmp_read_open(file
, ra
);
3269 xdr_truncate_encode(xdr
, starting_len
);
3274 nfsd4_encode_readlink(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readlink
*readlink
)
3279 struct xdr_stream
*xdr
= &resp
->xdr
;
3280 int length_offset
= xdr
->buf
->len
;
3286 p
= xdr_reserve_space(xdr
, 4);
3288 return nfserr_resource
;
3289 maxcount
= PAGE_SIZE
;
3291 p
= xdr_reserve_space(xdr
, maxcount
);
3293 return nfserr_resource
;
3295 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3296 * if they would overflow the buffer. Is this kosher in NFSv4? If
3297 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3298 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3300 nfserr
= nfsd_readlink(readlink
->rl_rqstp
, readlink
->rl_fhp
,
3301 (char *)p
, &maxcount
);
3302 if (nfserr
== nfserr_isdir
)
3303 nfserr
= nfserr_inval
;
3305 xdr_truncate_encode(xdr
, length_offset
);
3309 wire_count
= htonl(maxcount
);
3310 write_bytes_to_xdr_buf(xdr
->buf
, length_offset
, &wire_count
, 4);
3311 xdr_truncate_encode(xdr
, length_offset
+ 4 + ALIGN(maxcount
, 4));
3313 write_bytes_to_xdr_buf(xdr
->buf
, length_offset
+ 4 + maxcount
,
3314 &zero
, 4 - (maxcount
&3));
3319 nfsd4_encode_readdir(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_readdir
*readdir
)
3325 struct xdr_stream
*xdr
= &resp
->xdr
;
3326 int starting_len
= xdr
->buf
->len
;
3332 p
= xdr_reserve_space(xdr
, NFS4_VERIFIER_SIZE
);
3334 return nfserr_resource
;
3336 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3337 *p
++ = cpu_to_be32(0);
3338 *p
++ = cpu_to_be32(0);
3339 resp
->xdr
.buf
->head
[0].iov_len
= ((char *)resp
->xdr
.p
)
3340 - (char *)resp
->xdr
.buf
->head
[0].iov_base
;
3343 * Number of bytes left for directory entries allowing for the
3344 * final 8 bytes of the readdir and a following failed op:
3346 bytes_left
= xdr
->buf
->buflen
- xdr
->buf
->len
3347 - COMPOUND_ERR_SLACK_SPACE
- 8;
3348 if (bytes_left
< 0) {
3349 nfserr
= nfserr_resource
;
3352 maxcount
= min_t(u32
, readdir
->rd_maxcount
, INT_MAX
);
3354 * Note the rfc defines rd_maxcount as the size of the
3355 * READDIR4resok structure, which includes the verifier above
3356 * and the 8 bytes encoded at the end of this function:
3358 if (maxcount
< 16) {
3359 nfserr
= nfserr_toosmall
;
3362 maxcount
= min_t(int, maxcount
-16, bytes_left
);
3364 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3365 if (!readdir
->rd_dircount
)
3366 readdir
->rd_dircount
= INT_MAX
;
3369 readdir
->rd_maxcount
= maxcount
;
3370 readdir
->common
.err
= 0;
3371 readdir
->cookie_offset
= 0;
3373 offset
= readdir
->rd_cookie
;
3374 nfserr
= nfsd_readdir(readdir
->rd_rqstp
, readdir
->rd_fhp
,
3376 &readdir
->common
, nfsd4_encode_dirent
);
3377 if (nfserr
== nfs_ok
&&
3378 readdir
->common
.err
== nfserr_toosmall
&&
3379 xdr
->buf
->len
== starting_len
+ 8) {
3380 /* nothing encoded; which limit did we hit?: */
3381 if (maxcount
- 16 < bytes_left
)
3382 /* It was the fault of rd_maxcount: */
3383 nfserr
= nfserr_toosmall
;
3385 /* We ran out of buffer space: */
3386 nfserr
= nfserr_resource
;
3391 if (readdir
->cookie_offset
) {
3392 wire_offset
= cpu_to_be64(offset
);
3393 write_bytes_to_xdr_buf(xdr
->buf
, readdir
->cookie_offset
,
3397 p
= xdr_reserve_space(xdr
, 8);
3402 *p
++ = 0; /* no more entries */
3403 *p
++ = htonl(readdir
->common
.err
== nfserr_eof
);
3407 xdr_truncate_encode(xdr
, starting_len
);
3412 nfsd4_encode_remove(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_remove
*remove
)
3414 struct xdr_stream
*xdr
= &resp
->xdr
;
3418 p
= xdr_reserve_space(xdr
, 20);
3420 return nfserr_resource
;
3421 p
= encode_cinfo(p
, &remove
->rm_cinfo
);
3427 nfsd4_encode_rename(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_rename
*rename
)
3429 struct xdr_stream
*xdr
= &resp
->xdr
;
3433 p
= xdr_reserve_space(xdr
, 40);
3435 return nfserr_resource
;
3436 p
= encode_cinfo(p
, &rename
->rn_sinfo
);
3437 p
= encode_cinfo(p
, &rename
->rn_tinfo
);
3443 nfsd4_do_encode_secinfo(struct xdr_stream
*xdr
,
3444 __be32 nfserr
, struct svc_export
*exp
)
3446 u32 i
, nflavs
, supported
;
3447 struct exp_flavor_info
*flavs
;
3448 struct exp_flavor_info def_flavs
[2];
3449 __be32
*p
, *flavorsp
;
3450 static bool report
= true;
3454 nfserr
= nfserr_resource
;
3455 if (exp
->ex_nflavors
) {
3456 flavs
= exp
->ex_flavors
;
3457 nflavs
= exp
->ex_nflavors
;
3458 } else { /* Handling of some defaults in absence of real secinfo: */
3460 if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_UNIX
) {
3462 flavs
[0].pseudoflavor
= RPC_AUTH_UNIX
;
3463 flavs
[1].pseudoflavor
= RPC_AUTH_NULL
;
3464 } else if (exp
->ex_client
->flavour
->flavour
== RPC_AUTH_GSS
) {
3466 flavs
[0].pseudoflavor
3467 = svcauth_gss_flavor(exp
->ex_client
);
3470 flavs
[0].pseudoflavor
3471 = exp
->ex_client
->flavour
->flavour
;
3476 p
= xdr_reserve_space(xdr
, 4);
3479 flavorsp
= p
++; /* to be backfilled later */
3481 for (i
= 0; i
< nflavs
; i
++) {
3482 rpc_authflavor_t pf
= flavs
[i
].pseudoflavor
;
3483 struct rpcsec_gss_info info
;
3485 if (rpcauth_get_gssinfo(pf
, &info
) == 0) {
3487 p
= xdr_reserve_space(xdr
, 4 + 4 +
3488 XDR_LEN(info
.oid
.len
) + 4 + 4);
3491 *p
++ = cpu_to_be32(RPC_AUTH_GSS
);
3492 p
= xdr_encode_opaque(p
, info
.oid
.data
, info
.oid
.len
);
3493 *p
++ = cpu_to_be32(info
.qop
);
3494 *p
++ = cpu_to_be32(info
.service
);
3495 } else if (pf
< RPC_AUTH_MAXFLAVOR
) {
3497 p
= xdr_reserve_space(xdr
, 4);
3500 *p
++ = cpu_to_be32(pf
);
3503 pr_warn("NFS: SECINFO: security flavor %u "
3504 "is not supported\n", pf
);
3508 if (nflavs
!= supported
)
3510 *flavorsp
= htonl(supported
);
3519 nfsd4_encode_secinfo(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3520 struct nfsd4_secinfo
*secinfo
)
3522 struct xdr_stream
*xdr
= &resp
->xdr
;
3524 return nfsd4_do_encode_secinfo(xdr
, nfserr
, secinfo
->si_exp
);
3528 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3529 struct nfsd4_secinfo_no_name
*secinfo
)
3531 struct xdr_stream
*xdr
= &resp
->xdr
;
3533 return nfsd4_do_encode_secinfo(xdr
, nfserr
, secinfo
->sin_exp
);
3537 * The SETATTR encode routine is special -- it always encodes a bitmap,
3538 * regardless of the error status.
3541 nfsd4_encode_setattr(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setattr
*setattr
)
3543 struct xdr_stream
*xdr
= &resp
->xdr
;
3546 p
= xdr_reserve_space(xdr
, 16);
3548 return nfserr_resource
;
3550 *p
++ = cpu_to_be32(3);
3551 *p
++ = cpu_to_be32(0);
3552 *p
++ = cpu_to_be32(0);
3553 *p
++ = cpu_to_be32(0);
3556 *p
++ = cpu_to_be32(3);
3557 *p
++ = cpu_to_be32(setattr
->sa_bmval
[0]);
3558 *p
++ = cpu_to_be32(setattr
->sa_bmval
[1]);
3559 *p
++ = cpu_to_be32(setattr
->sa_bmval
[2]);
3565 nfsd4_encode_setclientid(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_setclientid
*scd
)
3567 struct xdr_stream
*xdr
= &resp
->xdr
;
3571 p
= xdr_reserve_space(xdr
, 8 + NFS4_VERIFIER_SIZE
);
3573 return nfserr_resource
;
3574 p
= xdr_encode_opaque_fixed(p
, &scd
->se_clientid
, 8);
3575 p
= xdr_encode_opaque_fixed(p
, &scd
->se_confirm
,
3576 NFS4_VERIFIER_SIZE
);
3578 else if (nfserr
== nfserr_clid_inuse
) {
3579 p
= xdr_reserve_space(xdr
, 8);
3581 return nfserr_resource
;
3582 *p
++ = cpu_to_be32(0);
3583 *p
++ = cpu_to_be32(0);
3589 nfsd4_encode_write(struct nfsd4_compoundres
*resp
, __be32 nfserr
, struct nfsd4_write
*write
)
3591 struct xdr_stream
*xdr
= &resp
->xdr
;
3595 p
= xdr_reserve_space(xdr
, 16);
3597 return nfserr_resource
;
3598 *p
++ = cpu_to_be32(write
->wr_bytes_written
);
3599 *p
++ = cpu_to_be32(write
->wr_how_written
);
3600 p
= xdr_encode_opaque_fixed(p
, write
->wr_verifier
.data
,
3601 NFS4_VERIFIER_SIZE
);
3606 static const u32 nfs4_minimal_spo_must_enforce
[2] = {
3607 [1] = 1 << (OP_BIND_CONN_TO_SESSION
- 32) |
3608 1 << (OP_EXCHANGE_ID
- 32) |
3609 1 << (OP_CREATE_SESSION
- 32) |
3610 1 << (OP_DESTROY_SESSION
- 32) |
3611 1 << (OP_DESTROY_CLIENTID
- 32)
3615 nfsd4_encode_exchange_id(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3616 struct nfsd4_exchange_id
*exid
)
3618 struct xdr_stream
*xdr
= &resp
->xdr
;
3623 int server_scope_sz
;
3624 uint64_t minor_id
= 0;
3629 major_id
= utsname()->nodename
;
3630 major_id_sz
= strlen(major_id
);
3631 server_scope
= utsname()->nodename
;
3632 server_scope_sz
= strlen(server_scope
);
3634 p
= xdr_reserve_space(xdr
,
3635 8 /* eir_clientid */ +
3636 4 /* eir_sequenceid */ +
3640 return nfserr_resource
;
3642 p
= xdr_encode_opaque_fixed(p
, &exid
->clientid
, 8);
3643 *p
++ = cpu_to_be32(exid
->seqid
);
3644 *p
++ = cpu_to_be32(exid
->flags
);
3646 *p
++ = cpu_to_be32(exid
->spa_how
);
3648 switch (exid
->spa_how
) {
3652 /* spo_must_enforce, spo_must_allow */
3653 p
= xdr_reserve_space(xdr
, 16);
3655 return nfserr_resource
;
3657 /* spo_must_enforce bitmap: */
3658 *p
++ = cpu_to_be32(2);
3659 *p
++ = cpu_to_be32(nfs4_minimal_spo_must_enforce
[0]);
3660 *p
++ = cpu_to_be32(nfs4_minimal_spo_must_enforce
[1]);
3661 /* empty spo_must_allow bitmap: */
3662 *p
++ = cpu_to_be32(0);
3669 p
= xdr_reserve_space(xdr
,
3670 8 /* so_minor_id */ +
3671 4 /* so_major_id.len */ +
3672 (XDR_QUADLEN(major_id_sz
) * 4) +
3673 4 /* eir_server_scope.len */ +
3674 (XDR_QUADLEN(server_scope_sz
) * 4) +
3675 4 /* eir_server_impl_id.count (0) */);
3677 return nfserr_resource
;
3679 /* The server_owner struct */
3680 p
= xdr_encode_hyper(p
, minor_id
); /* Minor id */
3682 p
= xdr_encode_opaque(p
, major_id
, major_id_sz
);
3685 p
= xdr_encode_opaque(p
, server_scope
, server_scope_sz
);
3687 /* Implementation id */
3688 *p
++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3693 nfsd4_encode_create_session(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3694 struct nfsd4_create_session
*sess
)
3696 struct xdr_stream
*xdr
= &resp
->xdr
;
3702 p
= xdr_reserve_space(xdr
, 24);
3704 return nfserr_resource
;
3705 p
= xdr_encode_opaque_fixed(p
, sess
->sessionid
.data
,
3706 NFS4_MAX_SESSIONID_LEN
);
3707 *p
++ = cpu_to_be32(sess
->seqid
);
3708 *p
++ = cpu_to_be32(sess
->flags
);
3710 p
= xdr_reserve_space(xdr
, 28);
3712 return nfserr_resource
;
3713 *p
++ = cpu_to_be32(0); /* headerpadsz */
3714 *p
++ = cpu_to_be32(sess
->fore_channel
.maxreq_sz
);
3715 *p
++ = cpu_to_be32(sess
->fore_channel
.maxresp_sz
);
3716 *p
++ = cpu_to_be32(sess
->fore_channel
.maxresp_cached
);
3717 *p
++ = cpu_to_be32(sess
->fore_channel
.maxops
);
3718 *p
++ = cpu_to_be32(sess
->fore_channel
.maxreqs
);
3719 *p
++ = cpu_to_be32(sess
->fore_channel
.nr_rdma_attrs
);
3721 if (sess
->fore_channel
.nr_rdma_attrs
) {
3722 p
= xdr_reserve_space(xdr
, 4);
3724 return nfserr_resource
;
3725 *p
++ = cpu_to_be32(sess
->fore_channel
.rdma_attrs
);
3728 p
= xdr_reserve_space(xdr
, 28);
3730 return nfserr_resource
;
3731 *p
++ = cpu_to_be32(0); /* headerpadsz */
3732 *p
++ = cpu_to_be32(sess
->back_channel
.maxreq_sz
);
3733 *p
++ = cpu_to_be32(sess
->back_channel
.maxresp_sz
);
3734 *p
++ = cpu_to_be32(sess
->back_channel
.maxresp_cached
);
3735 *p
++ = cpu_to_be32(sess
->back_channel
.maxops
);
3736 *p
++ = cpu_to_be32(sess
->back_channel
.maxreqs
);
3737 *p
++ = cpu_to_be32(sess
->back_channel
.nr_rdma_attrs
);
3739 if (sess
->back_channel
.nr_rdma_attrs
) {
3740 p
= xdr_reserve_space(xdr
, 4);
3742 return nfserr_resource
;
3743 *p
++ = cpu_to_be32(sess
->back_channel
.rdma_attrs
);
3749 nfsd4_encode_sequence(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3750 struct nfsd4_sequence
*seq
)
3752 struct xdr_stream
*xdr
= &resp
->xdr
;
3758 p
= xdr_reserve_space(xdr
, NFS4_MAX_SESSIONID_LEN
+ 20);
3760 return nfserr_resource
;
3761 p
= xdr_encode_opaque_fixed(p
, seq
->sessionid
.data
,
3762 NFS4_MAX_SESSIONID_LEN
);
3763 *p
++ = cpu_to_be32(seq
->seqid
);
3764 *p
++ = cpu_to_be32(seq
->slotid
);
3765 /* Note slotid's are numbered from zero: */
3766 *p
++ = cpu_to_be32(seq
->maxslots
- 1); /* sr_highest_slotid */
3767 *p
++ = cpu_to_be32(seq
->maxslots
- 1); /* sr_target_highest_slotid */
3768 *p
++ = cpu_to_be32(seq
->status_flags
);
3770 resp
->cstate
.data_offset
= xdr
->buf
->len
; /* DRC cache data pointer */
3775 nfsd4_encode_test_stateid(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3776 struct nfsd4_test_stateid
*test_stateid
)
3778 struct xdr_stream
*xdr
= &resp
->xdr
;
3779 struct nfsd4_test_stateid_id
*stateid
, *next
;
3785 p
= xdr_reserve_space(xdr
, 4 + (4 * test_stateid
->ts_num_ids
));
3787 return nfserr_resource
;
3788 *p
++ = htonl(test_stateid
->ts_num_ids
);
3790 list_for_each_entry_safe(stateid
, next
, &test_stateid
->ts_stateid_list
, ts_id_list
) {
3791 *p
++ = stateid
->ts_id_status
;
3798 nfsd4_encode_seek(struct nfsd4_compoundres
*resp
, __be32 nfserr
,
3799 struct nfsd4_seek
*seek
)
3806 p
= xdr_reserve_space(&resp
->xdr
, 4 + 8);
3807 *p
++ = cpu_to_be32(seek
->seek_eof
);
3808 p
= xdr_encode_hyper(p
, seek
->seek_pos
);
3814 nfsd4_encode_noop(struct nfsd4_compoundres
*resp
, __be32 nfserr
, void *p
)
3819 typedef __be32(* nfsd4_enc
)(struct nfsd4_compoundres
*, __be32
, void *);
3822 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3823 * since we don't need to filter out obsolete ops as this is
3824 * done in the decoding phase.
3826 static nfsd4_enc nfsd4_enc_ops
[] = {
3827 [OP_ACCESS
] = (nfsd4_enc
)nfsd4_encode_access
,
3828 [OP_CLOSE
] = (nfsd4_enc
)nfsd4_encode_close
,
3829 [OP_COMMIT
] = (nfsd4_enc
)nfsd4_encode_commit
,
3830 [OP_CREATE
] = (nfsd4_enc
)nfsd4_encode_create
,
3831 [OP_DELEGPURGE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3832 [OP_DELEGRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3833 [OP_GETATTR
] = (nfsd4_enc
)nfsd4_encode_getattr
,
3834 [OP_GETFH
] = (nfsd4_enc
)nfsd4_encode_getfh
,
3835 [OP_LINK
] = (nfsd4_enc
)nfsd4_encode_link
,
3836 [OP_LOCK
] = (nfsd4_enc
)nfsd4_encode_lock
,
3837 [OP_LOCKT
] = (nfsd4_enc
)nfsd4_encode_lockt
,
3838 [OP_LOCKU
] = (nfsd4_enc
)nfsd4_encode_locku
,
3839 [OP_LOOKUP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3840 [OP_LOOKUPP
] = (nfsd4_enc
)nfsd4_encode_noop
,
3841 [OP_NVERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3842 [OP_OPEN
] = (nfsd4_enc
)nfsd4_encode_open
,
3843 [OP_OPENATTR
] = (nfsd4_enc
)nfsd4_encode_noop
,
3844 [OP_OPEN_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_open_confirm
,
3845 [OP_OPEN_DOWNGRADE
] = (nfsd4_enc
)nfsd4_encode_open_downgrade
,
3846 [OP_PUTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3847 [OP_PUTPUBFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3848 [OP_PUTROOTFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3849 [OP_READ
] = (nfsd4_enc
)nfsd4_encode_read
,
3850 [OP_READDIR
] = (nfsd4_enc
)nfsd4_encode_readdir
,
3851 [OP_READLINK
] = (nfsd4_enc
)nfsd4_encode_readlink
,
3852 [OP_REMOVE
] = (nfsd4_enc
)nfsd4_encode_remove
,
3853 [OP_RENAME
] = (nfsd4_enc
)nfsd4_encode_rename
,
3854 [OP_RENEW
] = (nfsd4_enc
)nfsd4_encode_noop
,
3855 [OP_RESTOREFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3856 [OP_SAVEFH
] = (nfsd4_enc
)nfsd4_encode_noop
,
3857 [OP_SECINFO
] = (nfsd4_enc
)nfsd4_encode_secinfo
,
3858 [OP_SETATTR
] = (nfsd4_enc
)nfsd4_encode_setattr
,
3859 [OP_SETCLIENTID
] = (nfsd4_enc
)nfsd4_encode_setclientid
,
3860 [OP_SETCLIENTID_CONFIRM
] = (nfsd4_enc
)nfsd4_encode_noop
,
3861 [OP_VERIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3862 [OP_WRITE
] = (nfsd4_enc
)nfsd4_encode_write
,
3863 [OP_RELEASE_LOCKOWNER
] = (nfsd4_enc
)nfsd4_encode_noop
,
3865 /* NFSv4.1 operations */
3866 [OP_BACKCHANNEL_CTL
] = (nfsd4_enc
)nfsd4_encode_noop
,
3867 [OP_BIND_CONN_TO_SESSION
] = (nfsd4_enc
)nfsd4_encode_bind_conn_to_session
,
3868 [OP_EXCHANGE_ID
] = (nfsd4_enc
)nfsd4_encode_exchange_id
,
3869 [OP_CREATE_SESSION
] = (nfsd4_enc
)nfsd4_encode_create_session
,
3870 [OP_DESTROY_SESSION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3871 [OP_FREE_STATEID
] = (nfsd4_enc
)nfsd4_encode_noop
,
3872 [OP_GET_DIR_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3873 [OP_GETDEVICEINFO
] = (nfsd4_enc
)nfsd4_encode_noop
,
3874 [OP_GETDEVICELIST
] = (nfsd4_enc
)nfsd4_encode_noop
,
3875 [OP_LAYOUTCOMMIT
] = (nfsd4_enc
)nfsd4_encode_noop
,
3876 [OP_LAYOUTGET
] = (nfsd4_enc
)nfsd4_encode_noop
,
3877 [OP_LAYOUTRETURN
] = (nfsd4_enc
)nfsd4_encode_noop
,
3878 [OP_SECINFO_NO_NAME
] = (nfsd4_enc
)nfsd4_encode_secinfo_no_name
,
3879 [OP_SEQUENCE
] = (nfsd4_enc
)nfsd4_encode_sequence
,
3880 [OP_SET_SSV
] = (nfsd4_enc
)nfsd4_encode_noop
,
3881 [OP_TEST_STATEID
] = (nfsd4_enc
)nfsd4_encode_test_stateid
,
3882 [OP_WANT_DELEGATION
] = (nfsd4_enc
)nfsd4_encode_noop
,
3883 [OP_DESTROY_CLIENTID
] = (nfsd4_enc
)nfsd4_encode_noop
,
3884 [OP_RECLAIM_COMPLETE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3886 /* NFSv4.2 operations */
3887 [OP_ALLOCATE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3888 [OP_COPY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3889 [OP_COPY_NOTIFY
] = (nfsd4_enc
)nfsd4_encode_noop
,
3890 [OP_DEALLOCATE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3891 [OP_IO_ADVISE
] = (nfsd4_enc
)nfsd4_encode_noop
,
3892 [OP_LAYOUTERROR
] = (nfsd4_enc
)nfsd4_encode_noop
,
3893 [OP_LAYOUTSTATS
] = (nfsd4_enc
)nfsd4_encode_noop
,
3894 [OP_OFFLOAD_CANCEL
] = (nfsd4_enc
)nfsd4_encode_noop
,
3895 [OP_OFFLOAD_STATUS
] = (nfsd4_enc
)nfsd4_encode_noop
,
3896 [OP_READ_PLUS
] = (nfsd4_enc
)nfsd4_encode_noop
,
3897 [OP_SEEK
] = (nfsd4_enc
)nfsd4_encode_seek
,
3898 [OP_WRITE_SAME
] = (nfsd4_enc
)nfsd4_encode_noop
,
3902 * Calculate whether we still have space to encode repsize bytes.
3903 * There are two considerations:
3904 * - For NFS versions >=4.1, the size of the reply must stay within
3906 * - For all NFS versions, we must stay within limited preallocated
3909 * This is called before the operation is processed, so can only provide
3910 * an upper estimate. For some nonidempotent operations (such as
3911 * getattr), it's not necessarily a problem if that estimate is wrong,
3912 * as we can fail it after processing without significant side effects.
3914 __be32
nfsd4_check_resp_size(struct nfsd4_compoundres
*resp
, u32 respsize
)
3916 struct xdr_buf
*buf
= &resp
->rqstp
->rq_res
;
3917 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
3919 if (buf
->len
+ respsize
<= buf
->buflen
)
3921 if (!nfsd4_has_session(&resp
->cstate
))
3922 return nfserr_resource
;
3923 if (slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
) {
3925 return nfserr_rep_too_big_to_cache
;
3927 return nfserr_rep_too_big
;
3931 nfsd4_encode_operation(struct nfsd4_compoundres
*resp
, struct nfsd4_op
*op
)
3933 struct xdr_stream
*xdr
= &resp
->xdr
;
3934 struct nfs4_stateowner
*so
= resp
->cstate
.replay_owner
;
3935 struct svc_rqst
*rqstp
= resp
->rqstp
;
3936 int post_err_offset
;
3940 p
= xdr_reserve_space(xdr
, 8);
3945 *p
++ = cpu_to_be32(op
->opnum
);
3946 post_err_offset
= xdr
->buf
->len
;
3948 if (op
->opnum
== OP_ILLEGAL
)
3950 BUG_ON(op
->opnum
< 0 || op
->opnum
>= ARRAY_SIZE(nfsd4_enc_ops
) ||
3951 !nfsd4_enc_ops
[op
->opnum
]);
3952 encoder
= nfsd4_enc_ops
[op
->opnum
];
3953 op
->status
= encoder(resp
, op
->status
, &op
->u
);
3954 xdr_commit_encode(xdr
);
3956 /* nfsd4_check_resp_size guarantees enough room for error status */
3958 int space_needed
= 0;
3959 if (!nfsd4_last_compound_op(rqstp
))
3960 space_needed
= COMPOUND_ERR_SLACK_SPACE
;
3961 op
->status
= nfsd4_check_resp_size(resp
, space_needed
);
3963 if (op
->status
== nfserr_resource
&& nfsd4_has_session(&resp
->cstate
)) {
3964 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
3966 if (slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)
3967 op
->status
= nfserr_rep_too_big_to_cache
;
3969 op
->status
= nfserr_rep_too_big
;
3971 if (op
->status
== nfserr_resource
||
3972 op
->status
== nfserr_rep_too_big
||
3973 op
->status
== nfserr_rep_too_big_to_cache
) {
3975 * The operation may have already been encoded or
3976 * partially encoded. No op returns anything additional
3977 * in the case of one of these three errors, so we can
3978 * just truncate back to after the status. But it's a
3979 * bug if we had to do this on a non-idempotent op:
3981 warn_on_nonidempotent_op(op
);
3982 xdr_truncate_encode(xdr
, post_err_offset
);
3985 int len
= xdr
->buf
->len
- post_err_offset
;
3987 so
->so_replay
.rp_status
= op
->status
;
3988 so
->so_replay
.rp_buflen
= len
;
3989 read_bytes_from_xdr_buf(xdr
->buf
, post_err_offset
,
3990 so
->so_replay
.rp_buf
, len
);
3993 /* Note that op->status is already in network byte order: */
3994 write_bytes_to_xdr_buf(xdr
->buf
, post_err_offset
- 4, &op
->status
, 4);
3998 * Encode the reply stored in the stateowner reply cache
4000 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4001 * previously sent already encoded operation.
4004 nfsd4_encode_replay(struct xdr_stream
*xdr
, struct nfsd4_op
*op
)
4007 struct nfs4_replay
*rp
= op
->replay
;
4011 p
= xdr_reserve_space(xdr
, 8 + rp
->rp_buflen
);
4016 *p
++ = cpu_to_be32(op
->opnum
);
4017 *p
++ = rp
->rp_status
; /* already xdr'ed */
4019 p
= xdr_encode_opaque_fixed(p
, rp
->rp_buf
, rp
->rp_buflen
);
4023 nfs4svc_encode_voidres(struct svc_rqst
*rqstp
, __be32
*p
, void *dummy
)
4025 return xdr_ressize_check(rqstp
, p
);
4028 int nfsd4_release_compoundargs(void *rq
, __be32
*p
, void *resp
)
4030 struct svc_rqst
*rqstp
= rq
;
4031 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
4033 if (args
->ops
!= args
->iops
) {
4035 args
->ops
= args
->iops
;
4039 while (args
->to_free
) {
4040 struct svcxdr_tmpbuf
*tb
= args
->to_free
;
4041 args
->to_free
= tb
->next
;
4048 nfs4svc_decode_compoundargs(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundargs
*args
)
4050 if (rqstp
->rq_arg
.head
[0].iov_len
% 4) {
4051 /* client is nuts */
4052 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4053 __func__
, svc_addr(rqstp
), be32_to_cpu(rqstp
->rq_xid
));
4057 args
->end
= rqstp
->rq_arg
.head
[0].iov_base
+ rqstp
->rq_arg
.head
[0].iov_len
;
4058 args
->pagelist
= rqstp
->rq_arg
.pages
;
4059 args
->pagelen
= rqstp
->rq_arg
.page_len
;
4061 args
->to_free
= NULL
;
4062 args
->ops
= args
->iops
;
4063 args
->rqstp
= rqstp
;
4065 return !nfsd4_decode_compound(args
);
4069 nfs4svc_encode_compoundres(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd4_compoundres
*resp
)
4072 * All that remains is to write the tag and operation count...
4074 struct xdr_buf
*buf
= resp
->xdr
.buf
;
4076 WARN_ON_ONCE(buf
->len
!= buf
->head
[0].iov_len
+ buf
->page_len
+
4077 buf
->tail
[0].iov_len
);
4079 rqstp
->rq_next_page
= resp
->xdr
.page_ptr
+ 1;
4082 *p
++ = htonl(resp
->taglen
);
4083 memcpy(p
, resp
->tag
, resp
->taglen
);
4084 p
+= XDR_QUADLEN(resp
->taglen
);
4085 *p
++ = htonl(resp
->opcnt
);
4087 nfsd4_sequence_done(resp
);