2 * linux/fs/nfsd/nfs3xdr.c
4 * XDR support for nfsd/protocol version 3.
6 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
8 * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
11 #include <linux/types.h>
12 #include <linux/time.h>
13 #include <linux/nfs3.h>
14 #include <linux/list.h>
15 #include <linux/spinlock.h>
16 #include <linux/dcache.h>
17 #include <linux/namei.h>
19 #include <linux/vfs.h>
20 #include <linux/sunrpc/xdr.h>
21 #include <linux/sunrpc/svc.h>
22 #include <linux/nfsd/nfsd.h>
23 #include <linux/nfsd/xdr3.h>
25 #define NFSDDBG_FACILITY NFSDDBG_XDR
27 #ifdef NFSD_OPTIMIZE_SPACE
33 * Mapping of S_IF* types to NFS file types
35 static u32 nfs3_ftypes
[] = {
36 NF3NON
, NF3FIFO
, NF3CHR
, NF3BAD
,
37 NF3DIR
, NF3BAD
, NF3BLK
, NF3BAD
,
38 NF3REG
, NF3BAD
, NF3LNK
, NF3BAD
,
39 NF3SOCK
, NF3BAD
, NF3LNK
, NF3BAD
,
43 * XDR functions for basic NFS types
46 encode_time3(u32
*p
, struct timespec
*time
)
48 *p
++ = htonl((u32
) time
->tv_sec
); *p
++ = htonl(time
->tv_nsec
);
53 decode_time3(u32
*p
, struct timespec
*time
)
55 time
->tv_sec
= ntohl(*p
++);
56 time
->tv_nsec
= ntohl(*p
++);
61 decode_fh(u32
*p
, struct svc_fh
*fhp
)
64 fh_init(fhp
, NFS3_FHSIZE
);
66 if (size
> NFS3_FHSIZE
)
69 memcpy(&fhp
->fh_handle
.fh_base
, p
, size
);
70 fhp
->fh_handle
.fh_size
= size
;
71 return p
+ XDR_QUADLEN(size
);
74 /* Helper function for NFSv3 ACL code */
75 u32
*nfs3svc_decode_fh(u32
*p
, struct svc_fh
*fhp
)
77 return decode_fh(p
, fhp
);
81 encode_fh(u32
*p
, struct svc_fh
*fhp
)
83 unsigned int size
= fhp
->fh_handle
.fh_size
;
85 if (size
) p
[XDR_QUADLEN(size
)-1]=0;
86 memcpy(p
, &fhp
->fh_handle
.fh_base
, size
);
87 return p
+ XDR_QUADLEN(size
);
91 * Decode a file name and make sure that the path contains
92 * no slashes or null bytes.
95 decode_filename(u32
*p
, char **namp
, int *lenp
)
100 if ((p
= xdr_decode_string_inplace(p
, namp
, lenp
, NFS3_MAXNAMLEN
)) != NULL
) {
101 for (i
= 0, name
= *namp
; i
< *lenp
; i
++, name
++) {
102 if (*name
== '\0' || *name
== '/')
111 decode_sattr3(u32
*p
, struct iattr
*iap
)
118 iap
->ia_valid
|= ATTR_MODE
;
119 iap
->ia_mode
= ntohl(*p
++);
122 iap
->ia_valid
|= ATTR_UID
;
123 iap
->ia_uid
= ntohl(*p
++);
126 iap
->ia_valid
|= ATTR_GID
;
127 iap
->ia_gid
= ntohl(*p
++);
132 iap
->ia_valid
|= ATTR_SIZE
;
133 p
= xdr_decode_hyper(p
, &newsize
);
134 if (newsize
<= NFS_OFFSET_MAX
)
135 iap
->ia_size
= newsize
;
137 iap
->ia_size
= NFS_OFFSET_MAX
;
139 if ((tmp
= ntohl(*p
++)) == 1) { /* set to server time */
140 iap
->ia_valid
|= ATTR_ATIME
;
141 } else if (tmp
== 2) { /* set to client time */
142 iap
->ia_valid
|= ATTR_ATIME
| ATTR_ATIME_SET
;
143 iap
->ia_atime
.tv_sec
= ntohl(*p
++);
144 iap
->ia_atime
.tv_nsec
= ntohl(*p
++);
146 if ((tmp
= ntohl(*p
++)) == 1) { /* set to server time */
147 iap
->ia_valid
|= ATTR_MTIME
;
148 } else if (tmp
== 2) { /* set to client time */
149 iap
->ia_valid
|= ATTR_MTIME
| ATTR_MTIME_SET
;
150 iap
->ia_mtime
.tv_sec
= ntohl(*p
++);
151 iap
->ia_mtime
.tv_nsec
= ntohl(*p
++);
157 encode_fattr3(struct svc_rqst
*rqstp
, u32
*p
, struct svc_fh
*fhp
,
160 struct dentry
*dentry
= fhp
->fh_dentry
;
161 struct timespec time
;
163 *p
++ = htonl(nfs3_ftypes
[(stat
->mode
& S_IFMT
) >> 12]);
164 *p
++ = htonl((u32
) stat
->mode
);
165 *p
++ = htonl((u32
) stat
->nlink
);
166 *p
++ = htonl((u32
) nfsd_ruid(rqstp
, stat
->uid
));
167 *p
++ = htonl((u32
) nfsd_rgid(rqstp
, stat
->gid
));
168 if (S_ISLNK(stat
->mode
) && stat
->size
> NFS3_MAXPATHLEN
) {
169 p
= xdr_encode_hyper(p
, (u64
) NFS3_MAXPATHLEN
);
171 p
= xdr_encode_hyper(p
, (u64
) stat
->size
);
173 p
= xdr_encode_hyper(p
, ((u64
)stat
->blocks
) << 9);
174 *p
++ = htonl((u32
) MAJOR(stat
->rdev
));
175 *p
++ = htonl((u32
) MINOR(stat
->rdev
));
176 if (is_fsid(fhp
, rqstp
->rq_reffh
))
177 p
= xdr_encode_hyper(p
, (u64
) fhp
->fh_export
->ex_fsid
);
179 p
= xdr_encode_hyper(p
, (u64
) huge_encode_dev(stat
->dev
));
180 p
= xdr_encode_hyper(p
, (u64
) stat
->ino
);
181 p
= encode_time3(p
, &stat
->atime
);
182 lease_get_mtime(dentry
->d_inode
, &time
);
183 p
= encode_time3(p
, &time
);
184 p
= encode_time3(p
, &stat
->ctime
);
190 encode_saved_post_attr(struct svc_rqst
*rqstp
, u32
*p
, struct svc_fh
*fhp
)
192 struct inode
*inode
= fhp
->fh_dentry
->d_inode
;
194 /* Attributes to follow */
197 *p
++ = htonl(nfs3_ftypes
[(fhp
->fh_post_mode
& S_IFMT
) >> 12]);
198 *p
++ = htonl((u32
) fhp
->fh_post_mode
);
199 *p
++ = htonl((u32
) fhp
->fh_post_nlink
);
200 *p
++ = htonl((u32
) nfsd_ruid(rqstp
, fhp
->fh_post_uid
));
201 *p
++ = htonl((u32
) nfsd_rgid(rqstp
, fhp
->fh_post_gid
));
202 if (S_ISLNK(fhp
->fh_post_mode
) && fhp
->fh_post_size
> NFS3_MAXPATHLEN
) {
203 p
= xdr_encode_hyper(p
, (u64
) NFS3_MAXPATHLEN
);
205 p
= xdr_encode_hyper(p
, (u64
) fhp
->fh_post_size
);
207 p
= xdr_encode_hyper(p
, ((u64
)fhp
->fh_post_blocks
) << 9);
208 *p
++ = fhp
->fh_post_rdev
[0];
209 *p
++ = fhp
->fh_post_rdev
[1];
210 if (is_fsid(fhp
, rqstp
->rq_reffh
))
211 p
= xdr_encode_hyper(p
, (u64
) fhp
->fh_export
->ex_fsid
);
213 p
= xdr_encode_hyper(p
, (u64
)huge_encode_dev(inode
->i_sb
->s_dev
));
214 p
= xdr_encode_hyper(p
, (u64
) inode
->i_ino
);
215 p
= encode_time3(p
, &fhp
->fh_post_atime
);
216 p
= encode_time3(p
, &fhp
->fh_post_mtime
);
217 p
= encode_time3(p
, &fhp
->fh_post_ctime
);
223 * Encode post-operation attributes.
224 * The inode may be NULL if the call failed because of a stale file
225 * handle. In this case, no attributes are returned.
228 encode_post_op_attr(struct svc_rqst
*rqstp
, u32
*p
, struct svc_fh
*fhp
)
230 struct dentry
*dentry
= fhp
->fh_dentry
;
231 if (dentry
&& dentry
->d_inode
!= NULL
) {
235 err
= vfs_getattr(fhp
->fh_export
->ex_mnt
, dentry
, &stat
);
237 *p
++ = xdr_one
; /* attributes follow */
238 return encode_fattr3(rqstp
, p
, fhp
, &stat
);
245 /* Helper for NFSv3 ACLs */
247 nfs3svc_encode_post_op_attr(struct svc_rqst
*rqstp
, u32
*p
, struct svc_fh
*fhp
)
249 return encode_post_op_attr(rqstp
, p
, fhp
);
253 * Enocde weak cache consistency data
256 encode_wcc_data(struct svc_rqst
*rqstp
, u32
*p
, struct svc_fh
*fhp
)
258 struct dentry
*dentry
= fhp
->fh_dentry
;
260 if (dentry
&& dentry
->d_inode
&& fhp
->fh_post_saved
) {
261 if (fhp
->fh_pre_saved
) {
263 p
= xdr_encode_hyper(p
, (u64
) fhp
->fh_pre_size
);
264 p
= encode_time3(p
, &fhp
->fh_pre_mtime
);
265 p
= encode_time3(p
, &fhp
->fh_pre_ctime
);
269 return encode_saved_post_attr(rqstp
, p
, fhp
);
271 /* no pre- or post-attrs */
273 return encode_post_op_attr(rqstp
, p
, fhp
);
278 * XDR decode functions
281 nfs3svc_decode_fhandle(struct svc_rqst
*rqstp
, u32
*p
, struct nfsd_fhandle
*args
)
283 if (!(p
= decode_fh(p
, &args
->fh
)))
285 return xdr_argsize_check(rqstp
, p
);
289 nfs3svc_decode_sattrargs(struct svc_rqst
*rqstp
, u32
*p
,
290 struct nfsd3_sattrargs
*args
)
292 if (!(p
= decode_fh(p
, &args
->fh
))
293 || !(p
= decode_sattr3(p
, &args
->attrs
)))
296 if ((args
->check_guard
= ntohl(*p
++)) != 0) {
297 struct timespec time
;
298 p
= decode_time3(p
, &time
);
299 args
->guardtime
= time
.tv_sec
;
302 return xdr_argsize_check(rqstp
, p
);
306 nfs3svc_decode_diropargs(struct svc_rqst
*rqstp
, u32
*p
,
307 struct nfsd3_diropargs
*args
)
309 if (!(p
= decode_fh(p
, &args
->fh
))
310 || !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
313 return xdr_argsize_check(rqstp
, p
);
317 nfs3svc_decode_accessargs(struct svc_rqst
*rqstp
, u32
*p
,
318 struct nfsd3_accessargs
*args
)
320 if (!(p
= decode_fh(p
, &args
->fh
)))
322 args
->access
= ntohl(*p
++);
324 return xdr_argsize_check(rqstp
, p
);
328 nfs3svc_decode_readargs(struct svc_rqst
*rqstp
, u32
*p
,
329 struct nfsd3_readargs
*args
)
334 if (!(p
= decode_fh(p
, &args
->fh
))
335 || !(p
= xdr_decode_hyper(p
, &args
->offset
)))
338 len
= args
->count
= ntohl(*p
++);
340 if (len
> NFSSVC_MAXBLKSIZE
)
341 len
= NFSSVC_MAXBLKSIZE
;
343 /* set up the kvec */
346 pn
= rqstp
->rq_resused
++;
347 rqstp
->rq_vec
[v
].iov_base
= page_address(rqstp
->rq_respages
[pn
]);
348 rqstp
->rq_vec
[v
].iov_len
= len
< PAGE_SIZE
? len
: PAGE_SIZE
;
349 len
-= rqstp
->rq_vec
[v
].iov_len
;
353 return xdr_argsize_check(rqstp
, p
);
357 nfs3svc_decode_writeargs(struct svc_rqst
*rqstp
, u32
*p
,
358 struct nfsd3_writeargs
*args
)
360 unsigned int len
, v
, hdr
;
362 if (!(p
= decode_fh(p
, &args
->fh
))
363 || !(p
= xdr_decode_hyper(p
, &args
->offset
)))
366 args
->count
= ntohl(*p
++);
367 args
->stable
= ntohl(*p
++);
368 len
= args
->len
= ntohl(*p
++);
370 hdr
= (void*)p
- rqstp
->rq_arg
.head
[0].iov_base
;
371 if (rqstp
->rq_arg
.len
< hdr
||
372 rqstp
->rq_arg
.len
- hdr
< len
)
375 rqstp
->rq_vec
[0].iov_base
= (void*)p
;
376 rqstp
->rq_vec
[0].iov_len
= rqstp
->rq_arg
.head
[0].iov_len
- hdr
;
378 if (len
> NFSSVC_MAXBLKSIZE
)
379 len
= NFSSVC_MAXBLKSIZE
;
381 while (len
> rqstp
->rq_vec
[v
].iov_len
) {
382 len
-= rqstp
->rq_vec
[v
].iov_len
;
384 rqstp
->rq_vec
[v
].iov_base
= page_address(rqstp
->rq_pages
[v
]);
385 rqstp
->rq_vec
[v
].iov_len
= PAGE_SIZE
;
387 rqstp
->rq_vec
[v
].iov_len
= len
;
390 return args
->count
== args
->len
&& rqstp
->rq_vec
[0].iov_len
> 0;
394 nfs3svc_decode_createargs(struct svc_rqst
*rqstp
, u32
*p
,
395 struct nfsd3_createargs
*args
)
397 if (!(p
= decode_fh(p
, &args
->fh
))
398 || !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
401 switch (args
->createmode
= ntohl(*p
++)) {
402 case NFS3_CREATE_UNCHECKED
:
403 case NFS3_CREATE_GUARDED
:
404 if (!(p
= decode_sattr3(p
, &args
->attrs
)))
407 case NFS3_CREATE_EXCLUSIVE
:
415 return xdr_argsize_check(rqstp
, p
);
418 nfs3svc_decode_mkdirargs(struct svc_rqst
*rqstp
, u32
*p
,
419 struct nfsd3_createargs
*args
)
421 if (!(p
= decode_fh(p
, &args
->fh
))
422 || !(p
= decode_filename(p
, &args
->name
, &args
->len
))
423 || !(p
= decode_sattr3(p
, &args
->attrs
)))
426 return xdr_argsize_check(rqstp
, p
);
430 nfs3svc_decode_symlinkargs(struct svc_rqst
*rqstp
, u32
*p
,
431 struct nfsd3_symlinkargs
*args
)
438 if (!(p
= decode_fh(p
, &args
->ffh
))
439 || !(p
= decode_filename(p
, &args
->fname
, &args
->flen
))
440 || !(p
= decode_sattr3(p
, &args
->attrs
))
443 /* now decode the pathname, which might be larger than the first page.
444 * As we have to check for nul's anyway, we copy it into a new page
445 * This page appears in the rq_res.pages list, but as pages_len is always
446 * 0, it won't get in the way
449 if (len
== 0 || len
> NFS3_MAXPATHLEN
|| len
>= PAGE_SIZE
)
452 page_address(rqstp
->rq_respages
[rqstp
->rq_resused
++]);
454 /* first copy and check from the first page */
456 vec
= &rqstp
->rq_arg
.head
[0];
457 avail
= vec
->iov_len
- (old
- (char*)vec
->iov_base
);
458 while (len
&& avail
&& *old
) {
463 /* now copy next page if there is one */
464 if (len
&& !avail
&& rqstp
->rq_arg
.page_len
) {
465 avail
= rqstp
->rq_arg
.page_len
;
466 if (avail
> PAGE_SIZE
) avail
= PAGE_SIZE
;
467 old
= page_address(rqstp
->rq_arg
.pages
[0]);
469 while (len
&& avail
&& *old
) {
482 nfs3svc_decode_mknodargs(struct svc_rqst
*rqstp
, u32
*p
,
483 struct nfsd3_mknodargs
*args
)
485 if (!(p
= decode_fh(p
, &args
->fh
))
486 || !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
489 args
->ftype
= ntohl(*p
++);
491 if (args
->ftype
== NF3BLK
|| args
->ftype
== NF3CHR
492 || args
->ftype
== NF3SOCK
|| args
->ftype
== NF3FIFO
) {
493 if (!(p
= decode_sattr3(p
, &args
->attrs
)))
497 if (args
->ftype
== NF3BLK
|| args
->ftype
== NF3CHR
) {
498 args
->major
= ntohl(*p
++);
499 args
->minor
= ntohl(*p
++);
502 return xdr_argsize_check(rqstp
, p
);
506 nfs3svc_decode_renameargs(struct svc_rqst
*rqstp
, u32
*p
,
507 struct nfsd3_renameargs
*args
)
509 if (!(p
= decode_fh(p
, &args
->ffh
))
510 || !(p
= decode_filename(p
, &args
->fname
, &args
->flen
))
511 || !(p
= decode_fh(p
, &args
->tfh
))
512 || !(p
= decode_filename(p
, &args
->tname
, &args
->tlen
)))
515 return xdr_argsize_check(rqstp
, p
);
519 nfs3svc_decode_readlinkargs(struct svc_rqst
*rqstp
, u32
*p
,
520 struct nfsd3_readlinkargs
*args
)
522 if (!(p
= decode_fh(p
, &args
->fh
)))
525 page_address(rqstp
->rq_respages
[rqstp
->rq_resused
++]);
527 return xdr_argsize_check(rqstp
, p
);
531 nfs3svc_decode_linkargs(struct svc_rqst
*rqstp
, u32
*p
,
532 struct nfsd3_linkargs
*args
)
534 if (!(p
= decode_fh(p
, &args
->ffh
))
535 || !(p
= decode_fh(p
, &args
->tfh
))
536 || !(p
= decode_filename(p
, &args
->tname
, &args
->tlen
)))
539 return xdr_argsize_check(rqstp
, p
);
543 nfs3svc_decode_readdirargs(struct svc_rqst
*rqstp
, u32
*p
,
544 struct nfsd3_readdirargs
*args
)
546 if (!(p
= decode_fh(p
, &args
->fh
)))
548 p
= xdr_decode_hyper(p
, &args
->cookie
);
549 args
->verf
= p
; p
+= 2;
551 args
->count
= ntohl(*p
++);
553 if (args
->count
> PAGE_SIZE
)
554 args
->count
= PAGE_SIZE
;
557 page_address(rqstp
->rq_respages
[rqstp
->rq_resused
++]);
559 return xdr_argsize_check(rqstp
, p
);
563 nfs3svc_decode_readdirplusargs(struct svc_rqst
*rqstp
, u32
*p
,
564 struct nfsd3_readdirargs
*args
)
568 if (!(p
= decode_fh(p
, &args
->fh
)))
570 p
= xdr_decode_hyper(p
, &args
->cookie
);
571 args
->verf
= p
; p
+= 2;
572 args
->dircount
= ntohl(*p
++);
573 args
->count
= ntohl(*p
++);
575 len
= (args
->count
> NFSSVC_MAXBLKSIZE
) ? NFSSVC_MAXBLKSIZE
:
580 pn
= rqstp
->rq_resused
++;
582 args
->buffer
= page_address(rqstp
->rq_respages
[pn
]);
586 return xdr_argsize_check(rqstp
, p
);
590 nfs3svc_decode_commitargs(struct svc_rqst
*rqstp
, u32
*p
,
591 struct nfsd3_commitargs
*args
)
593 if (!(p
= decode_fh(p
, &args
->fh
)))
595 p
= xdr_decode_hyper(p
, &args
->offset
);
596 args
->count
= ntohl(*p
++);
598 return xdr_argsize_check(rqstp
, p
);
602 * XDR encode functions
605 * There must be an encoding function for void results so svc_process
606 * will work properly.
609 nfs3svc_encode_voidres(struct svc_rqst
*rqstp
, u32
*p
, void *dummy
)
611 return xdr_ressize_check(rqstp
, p
);
616 nfs3svc_encode_attrstat(struct svc_rqst
*rqstp
, u32
*p
,
617 struct nfsd3_attrstat
*resp
)
619 if (resp
->status
== 0)
620 p
= encode_fattr3(rqstp
, p
, &resp
->fh
, &resp
->stat
);
621 return xdr_ressize_check(rqstp
, p
);
624 /* SETATTR, REMOVE, RMDIR */
626 nfs3svc_encode_wccstat(struct svc_rqst
*rqstp
, u32
*p
,
627 struct nfsd3_attrstat
*resp
)
629 p
= encode_wcc_data(rqstp
, p
, &resp
->fh
);
630 return xdr_ressize_check(rqstp
, p
);
635 nfs3svc_encode_diropres(struct svc_rqst
*rqstp
, u32
*p
,
636 struct nfsd3_diropres
*resp
)
638 if (resp
->status
== 0) {
639 p
= encode_fh(p
, &resp
->fh
);
640 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
642 p
= encode_post_op_attr(rqstp
, p
, &resp
->dirfh
);
643 return xdr_ressize_check(rqstp
, p
);
648 nfs3svc_encode_accessres(struct svc_rqst
*rqstp
, u32
*p
,
649 struct nfsd3_accessres
*resp
)
651 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
652 if (resp
->status
== 0)
653 *p
++ = htonl(resp
->access
);
654 return xdr_ressize_check(rqstp
, p
);
659 nfs3svc_encode_readlinkres(struct svc_rqst
*rqstp
, u32
*p
,
660 struct nfsd3_readlinkres
*resp
)
662 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
663 if (resp
->status
== 0) {
664 *p
++ = htonl(resp
->len
);
665 xdr_ressize_check(rqstp
, p
);
666 rqstp
->rq_res
.page_len
= resp
->len
;
668 /* need to pad the tail */
669 rqstp
->rq_res
.tail
[0].iov_base
= p
;
671 rqstp
->rq_res
.tail
[0].iov_len
= 4 - (resp
->len
&3);
675 return xdr_ressize_check(rqstp
, p
);
680 nfs3svc_encode_readres(struct svc_rqst
*rqstp
, u32
*p
,
681 struct nfsd3_readres
*resp
)
683 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
684 if (resp
->status
== 0) {
685 *p
++ = htonl(resp
->count
);
686 *p
++ = htonl(resp
->eof
);
687 *p
++ = htonl(resp
->count
); /* xdr opaque count */
688 xdr_ressize_check(rqstp
, p
);
689 /* now update rqstp->rq_res to reflect data aswell */
690 rqstp
->rq_res
.page_len
= resp
->count
;
691 if (resp
->count
& 3) {
692 /* need to pad the tail */
693 rqstp
->rq_res
.tail
[0].iov_base
= p
;
695 rqstp
->rq_res
.tail
[0].iov_len
= 4 - (resp
->count
& 3);
699 return xdr_ressize_check(rqstp
, p
);
704 nfs3svc_encode_writeres(struct svc_rqst
*rqstp
, u32
*p
,
705 struct nfsd3_writeres
*resp
)
707 p
= encode_wcc_data(rqstp
, p
, &resp
->fh
);
708 if (resp
->status
== 0) {
709 *p
++ = htonl(resp
->count
);
710 *p
++ = htonl(resp
->committed
);
711 *p
++ = htonl(nfssvc_boot
.tv_sec
);
712 *p
++ = htonl(nfssvc_boot
.tv_usec
);
714 return xdr_ressize_check(rqstp
, p
);
717 /* CREATE, MKDIR, SYMLINK, MKNOD */
719 nfs3svc_encode_createres(struct svc_rqst
*rqstp
, u32
*p
,
720 struct nfsd3_diropres
*resp
)
722 if (resp
->status
== 0) {
724 p
= encode_fh(p
, &resp
->fh
);
725 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
727 p
= encode_wcc_data(rqstp
, p
, &resp
->dirfh
);
728 return xdr_ressize_check(rqstp
, p
);
733 nfs3svc_encode_renameres(struct svc_rqst
*rqstp
, u32
*p
,
734 struct nfsd3_renameres
*resp
)
736 p
= encode_wcc_data(rqstp
, p
, &resp
->ffh
);
737 p
= encode_wcc_data(rqstp
, p
, &resp
->tfh
);
738 return xdr_ressize_check(rqstp
, p
);
743 nfs3svc_encode_linkres(struct svc_rqst
*rqstp
, u32
*p
,
744 struct nfsd3_linkres
*resp
)
746 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
747 p
= encode_wcc_data(rqstp
, p
, &resp
->tfh
);
748 return xdr_ressize_check(rqstp
, p
);
753 nfs3svc_encode_readdirres(struct svc_rqst
*rqstp
, u32
*p
,
754 struct nfsd3_readdirres
*resp
)
756 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
758 if (resp
->status
== 0) {
759 /* stupid readdir cookie */
760 memcpy(p
, resp
->verf
, 8); p
+= 2;
761 xdr_ressize_check(rqstp
, p
);
762 if (rqstp
->rq_res
.head
[0].iov_len
+ (2<<2) > PAGE_SIZE
)
763 return 1; /*No room for trailer */
764 rqstp
->rq_res
.page_len
= (resp
->count
) << 2;
766 /* add the 'tail' to the end of the 'head' page - page 0. */
767 rqstp
->rq_res
.tail
[0].iov_base
= p
;
768 *p
++ = 0; /* no more entries */
769 *p
++ = htonl(resp
->common
.err
== nfserr_eof
);
770 rqstp
->rq_res
.tail
[0].iov_len
= 2<<2;
773 return xdr_ressize_check(rqstp
, p
);
777 encode_entry_baggage(struct nfsd3_readdirres
*cd
, u32
*p
, const char *name
,
778 int namlen
, ino_t ino
)
780 *p
++ = xdr_one
; /* mark entry present */
781 p
= xdr_encode_hyper(p
, ino
); /* file id */
782 p
= xdr_encode_array(p
, name
, namlen
);/* name length & name */
784 cd
->offset
= p
; /* remember pointer */
785 p
= xdr_encode_hyper(p
, NFS_OFFSET_MAX
);/* offset of next entry */
791 encode_entryplus_baggage(struct nfsd3_readdirres
*cd
, u32
*p
,
794 p
= encode_post_op_attr(cd
->rqstp
, p
, fhp
);
795 *p
++ = xdr_one
; /* yes, a file handle follows */
796 p
= encode_fh(p
, fhp
);
802 compose_entry_fh(struct nfsd3_readdirres
*cd
, struct svc_fh
*fhp
,
803 const char *name
, int namlen
)
805 struct svc_export
*exp
;
806 struct dentry
*dparent
, *dchild
;
809 dparent
= cd
->fh
.fh_dentry
;
810 exp
= cd
->fh
.fh_export
;
812 fh_init(fhp
, NFS3_FHSIZE
);
813 if (isdotent(name
, namlen
)) {
815 dchild
= dget_parent(dparent
);
816 if (dchild
== dparent
) {
817 /* filesystem root - cannot return filehandle for ".." */
822 dchild
= dget(dparent
);
824 dchild
= lookup_one_len(name
, dparent
, namlen
);
827 if (d_mountpoint(dchild
) ||
828 fh_compose(fhp
, exp
, dchild
, &cd
->fh
) != 0 ||
836 * Encode a directory entry. This one works for both normal readdir
838 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
839 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
841 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
845 #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
846 #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
848 encode_entry(struct readdir_cd
*ccd
, const char *name
,
849 int namlen
, off_t offset
, ino_t ino
, unsigned int d_type
, int plus
)
851 struct nfsd3_readdirres
*cd
= container_of(ccd
, struct nfsd3_readdirres
,
854 caddr_t curr_page_addr
= NULL
;
855 int pn
; /* current page number */
856 int slen
; /* string (name) length */
857 int elen
; /* estimated entry length in words */
858 int num_entry_words
= 0; /* actual number of words */
861 u64 offset64
= offset
;
863 if (unlikely(cd
->offset1
)) {
864 /* we ended up with offset on a page boundary */
865 *cd
->offset
= htonl(offset64
>> 32);
866 *cd
->offset1
= htonl(offset64
& 0xffffffff);
869 xdr_encode_hyper(cd
->offset
, (u64
) offset
);
874 dprintk("encode_entry(%.*s @%ld%s)\n",
875 namlen, name, (long) offset, plus? " plus" : "");
878 /* truncate filename if too long */
879 if (namlen
> NFS3_MAXNAMLEN
)
880 namlen
= NFS3_MAXNAMLEN
;
882 slen
= XDR_QUADLEN(namlen
);
883 elen
= slen
+ NFS3_ENTRY_BAGGAGE
884 + (plus
? NFS3_ENTRYPLUS_BAGGAGE
: 0);
886 if (cd
->buflen
< elen
) {
887 cd
->common
.err
= nfserr_toosmall
;
891 /* determine which page in rq_respages[] we are currently filling */
892 for (pn
=1; pn
< cd
->rqstp
->rq_resused
; pn
++) {
893 curr_page_addr
= page_address(cd
->rqstp
->rq_respages
[pn
]);
895 if (((caddr_t
)cd
->buffer
>= curr_page_addr
) &&
896 ((caddr_t
)cd
->buffer
< curr_page_addr
+ PAGE_SIZE
))
900 if ((caddr_t
)(cd
->buffer
+ elen
) < (curr_page_addr
+ PAGE_SIZE
)) {
901 /* encode entry in current page */
903 p
= encode_entry_baggage(cd
, p
, name
, namlen
, ino
);
905 /* throw in readdirplus baggage */
909 if (compose_entry_fh(cd
, &fh
, name
, namlen
) > 0) {
913 p
= encode_entryplus_baggage(cd
, p
, &fh
);
915 num_entry_words
= p
- cd
->buffer
;
916 } else if (cd
->rqstp
->rq_respages
[pn
+1] != NULL
) {
917 /* temporarily encode entry into next page, then move back to
918 * current and next page in rq_respages[] */
922 /* grab next page for temporary storage of entry */
923 p1
= tmp
= page_address(cd
->rqstp
->rq_respages
[pn
+1]);
925 p1
= encode_entry_baggage(cd
, p1
, name
, namlen
, ino
);
927 /* throw in readdirplus baggage */
931 if (compose_entry_fh(cd
, &fh
, name
, namlen
) > 0) {
932 /* zero out the filehandle */
936 p1
= encode_entryplus_baggage(cd
, p1
, &fh
);
939 /* determine entry word length and lengths to go in pages */
940 num_entry_words
= p1
- tmp
;
941 len1
= curr_page_addr
+ PAGE_SIZE
- (caddr_t
)cd
->buffer
;
942 if ((num_entry_words
<< 2) < len1
) {
943 /* the actual number of words in the entry is less
944 * than elen and can still fit in the current page
946 memmove(p
, tmp
, num_entry_words
<< 2);
947 p
+= num_entry_words
;
950 cd
->offset
= cd
->buffer
+ (cd
->offset
- tmp
);
952 unsigned int offset_r
= (cd
->offset
- tmp
) << 2;
954 /* update pointer to offset location.
955 * This is a 64bit quantity, so we need to
957 * - entirely in first page
958 * - entirely in second page
959 * - 4 bytes in each page
961 if (offset_r
+ 8 <= len1
) {
962 cd
->offset
= p
+ (cd
->offset
- tmp
);
963 } else if (offset_r
>= len1
) {
964 cd
->offset
-= len1
>> 2;
966 /* sitting on the fence */
967 BUG_ON(offset_r
!= len1
- 4);
968 cd
->offset
= p
+ (cd
->offset
- tmp
);
972 len2
= (num_entry_words
<< 2) - len1
;
974 /* move from temp page to current and next pages */
975 memmove(p
, tmp
, len1
);
976 memmove(tmp
, (caddr_t
)tmp
+len1
, len2
);
978 p
= tmp
+ (len2
>> 2);
982 cd
->common
.err
= nfserr_toosmall
;
986 cd
->buflen
-= num_entry_words
;
988 cd
->common
.err
= nfs_ok
;
994 nfs3svc_encode_entry(struct readdir_cd
*cd
, const char *name
,
995 int namlen
, loff_t offset
, ino_t ino
, unsigned int d_type
)
997 return encode_entry(cd
, name
, namlen
, offset
, ino
, d_type
, 0);
1001 nfs3svc_encode_entry_plus(struct readdir_cd
*cd
, const char *name
,
1002 int namlen
, loff_t offset
, ino_t ino
, unsigned int d_type
)
1004 return encode_entry(cd
, name
, namlen
, offset
, ino
, d_type
, 1);
1009 nfs3svc_encode_fsstatres(struct svc_rqst
*rqstp
, u32
*p
,
1010 struct nfsd3_fsstatres
*resp
)
1012 struct kstatfs
*s
= &resp
->stats
;
1013 u64 bs
= s
->f_bsize
;
1015 *p
++ = xdr_zero
; /* no post_op_attr */
1017 if (resp
->status
== 0) {
1018 p
= xdr_encode_hyper(p
, bs
* s
->f_blocks
); /* total bytes */
1019 p
= xdr_encode_hyper(p
, bs
* s
->f_bfree
); /* free bytes */
1020 p
= xdr_encode_hyper(p
, bs
* s
->f_bavail
); /* user available bytes */
1021 p
= xdr_encode_hyper(p
, s
->f_files
); /* total inodes */
1022 p
= xdr_encode_hyper(p
, s
->f_ffree
); /* free inodes */
1023 p
= xdr_encode_hyper(p
, s
->f_ffree
); /* user available inodes */
1024 *p
++ = htonl(resp
->invarsec
); /* mean unchanged time */
1026 return xdr_ressize_check(rqstp
, p
);
1031 nfs3svc_encode_fsinfores(struct svc_rqst
*rqstp
, u32
*p
,
1032 struct nfsd3_fsinfores
*resp
)
1034 *p
++ = xdr_zero
; /* no post_op_attr */
1036 if (resp
->status
== 0) {
1037 *p
++ = htonl(resp
->f_rtmax
);
1038 *p
++ = htonl(resp
->f_rtpref
);
1039 *p
++ = htonl(resp
->f_rtmult
);
1040 *p
++ = htonl(resp
->f_wtmax
);
1041 *p
++ = htonl(resp
->f_wtpref
);
1042 *p
++ = htonl(resp
->f_wtmult
);
1043 *p
++ = htonl(resp
->f_dtpref
);
1044 p
= xdr_encode_hyper(p
, resp
->f_maxfilesize
);
1047 *p
++ = htonl(resp
->f_properties
);
1050 return xdr_ressize_check(rqstp
, p
);
1055 nfs3svc_encode_pathconfres(struct svc_rqst
*rqstp
, u32
*p
,
1056 struct nfsd3_pathconfres
*resp
)
1058 *p
++ = xdr_zero
; /* no post_op_attr */
1060 if (resp
->status
== 0) {
1061 *p
++ = htonl(resp
->p_link_max
);
1062 *p
++ = htonl(resp
->p_name_max
);
1063 *p
++ = htonl(resp
->p_no_trunc
);
1064 *p
++ = htonl(resp
->p_chown_restricted
);
1065 *p
++ = htonl(resp
->p_case_insensitive
);
1066 *p
++ = htonl(resp
->p_case_preserving
);
1069 return xdr_ressize_check(rqstp
, p
);
1074 nfs3svc_encode_commitres(struct svc_rqst
*rqstp
, u32
*p
,
1075 struct nfsd3_commitres
*resp
)
1077 p
= encode_wcc_data(rqstp
, p
, &resp
->fh
);
1078 /* Write verifier */
1079 if (resp
->status
== 0) {
1080 *p
++ = htonl(nfssvc_boot
.tv_sec
);
1081 *p
++ = htonl(nfssvc_boot
.tv_usec
);
1083 return xdr_ressize_check(rqstp
, p
);
1087 * XDR release functions
1090 nfs3svc_release_fhandle(struct svc_rqst
*rqstp
, u32
*p
,
1091 struct nfsd3_attrstat
*resp
)
1098 nfs3svc_release_fhandle2(struct svc_rqst
*rqstp
, u32
*p
,
1099 struct nfsd3_fhandle_pair
*resp
)