2 * XDR support for nfsd/protocol version 3.
4 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
6 * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
9 #include <linux/namei.h>
10 #include <linux/sunrpc/svc_xprt.h>
16 #define NFSDDBG_FACILITY NFSDDBG_XDR
20 * Mapping of S_IF* types to NFS file types
22 static u32 nfs3_ftypes
[] = {
23 NF3NON
, NF3FIFO
, NF3CHR
, NF3BAD
,
24 NF3DIR
, NF3BAD
, NF3BLK
, NF3BAD
,
25 NF3REG
, NF3BAD
, NF3LNK
, NF3BAD
,
26 NF3SOCK
, NF3BAD
, NF3LNK
, NF3BAD
,
30 * XDR functions for basic NFS types
33 encode_time3(__be32
*p
, struct timespec
*time
)
35 *p
++ = htonl((u32
) time
->tv_sec
); *p
++ = htonl(time
->tv_nsec
);
40 decode_time3(__be32
*p
, struct timespec
*time
)
42 time
->tv_sec
= ntohl(*p
++);
43 time
->tv_nsec
= ntohl(*p
++);
48 decode_fh(__be32
*p
, struct svc_fh
*fhp
)
51 fh_init(fhp
, NFS3_FHSIZE
);
53 if (size
> NFS3_FHSIZE
)
56 memcpy(&fhp
->fh_handle
.fh_base
, p
, size
);
57 fhp
->fh_handle
.fh_size
= size
;
58 return p
+ XDR_QUADLEN(size
);
61 /* Helper function for NFSv3 ACL code */
62 __be32
*nfs3svc_decode_fh(__be32
*p
, struct svc_fh
*fhp
)
64 return decode_fh(p
, fhp
);
68 encode_fh(__be32
*p
, struct svc_fh
*fhp
)
70 unsigned int size
= fhp
->fh_handle
.fh_size
;
72 if (size
) p
[XDR_QUADLEN(size
)-1]=0;
73 memcpy(p
, &fhp
->fh_handle
.fh_base
, size
);
74 return p
+ XDR_QUADLEN(size
);
78 * Decode a file name and make sure that the path contains
79 * no slashes or null bytes.
82 decode_filename(__be32
*p
, char **namp
, unsigned int *lenp
)
87 if ((p
= xdr_decode_string_inplace(p
, namp
, lenp
, NFS3_MAXNAMLEN
)) != NULL
) {
88 for (i
= 0, name
= *namp
; i
< *lenp
; i
++, name
++) {
89 if (*name
== '\0' || *name
== '/')
98 decode_sattr3(__be32
*p
, struct iattr
*iap
)
105 iap
->ia_valid
|= ATTR_MODE
;
106 iap
->ia_mode
= ntohl(*p
++);
109 iap
->ia_uid
= make_kuid(&init_user_ns
, ntohl(*p
++));
110 if (uid_valid(iap
->ia_uid
))
111 iap
->ia_valid
|= ATTR_UID
;
114 iap
->ia_gid
= make_kgid(&init_user_ns
, ntohl(*p
++));
115 if (gid_valid(iap
->ia_gid
))
116 iap
->ia_valid
|= ATTR_GID
;
121 iap
->ia_valid
|= ATTR_SIZE
;
122 p
= xdr_decode_hyper(p
, &newsize
);
123 iap
->ia_size
= min_t(u64
, newsize
, NFS_OFFSET_MAX
);
125 if ((tmp
= ntohl(*p
++)) == 1) { /* set to server time */
126 iap
->ia_valid
|= ATTR_ATIME
;
127 } else if (tmp
== 2) { /* set to client time */
128 iap
->ia_valid
|= ATTR_ATIME
| ATTR_ATIME_SET
;
129 iap
->ia_atime
.tv_sec
= ntohl(*p
++);
130 iap
->ia_atime
.tv_nsec
= ntohl(*p
++);
132 if ((tmp
= ntohl(*p
++)) == 1) { /* set to server time */
133 iap
->ia_valid
|= ATTR_MTIME
;
134 } else if (tmp
== 2) { /* set to client time */
135 iap
->ia_valid
|= ATTR_MTIME
| ATTR_MTIME_SET
;
136 iap
->ia_mtime
.tv_sec
= ntohl(*p
++);
137 iap
->ia_mtime
.tv_nsec
= ntohl(*p
++);
142 static __be32
*encode_fsid(__be32
*p
, struct svc_fh
*fhp
)
145 switch(fsid_source(fhp
)) {
148 p
= xdr_encode_hyper(p
, (u64
)huge_encode_dev
149 (fhp
->fh_dentry
->d_sb
->s_dev
));
151 case FSIDSOURCE_FSID
:
152 p
= xdr_encode_hyper(p
, (u64
) fhp
->fh_export
->ex_fsid
);
154 case FSIDSOURCE_UUID
:
155 f
= ((u64
*)fhp
->fh_export
->ex_uuid
)[0];
156 f
^= ((u64
*)fhp
->fh_export
->ex_uuid
)[1];
157 p
= xdr_encode_hyper(p
, f
);
164 encode_fattr3(struct svc_rqst
*rqstp
, __be32
*p
, struct svc_fh
*fhp
,
167 *p
++ = htonl(nfs3_ftypes
[(stat
->mode
& S_IFMT
) >> 12]);
168 *p
++ = htonl((u32
) (stat
->mode
& S_IALLUGO
));
169 *p
++ = htonl((u32
) stat
->nlink
);
170 *p
++ = htonl((u32
) from_kuid(&init_user_ns
, stat
->uid
));
171 *p
++ = htonl((u32
) from_kgid(&init_user_ns
, stat
->gid
));
172 if (S_ISLNK(stat
->mode
) && stat
->size
> NFS3_MAXPATHLEN
) {
173 p
= xdr_encode_hyper(p
, (u64
) NFS3_MAXPATHLEN
);
175 p
= xdr_encode_hyper(p
, (u64
) stat
->size
);
177 p
= xdr_encode_hyper(p
, ((u64
)stat
->blocks
) << 9);
178 *p
++ = htonl((u32
) MAJOR(stat
->rdev
));
179 *p
++ = htonl((u32
) MINOR(stat
->rdev
));
180 p
= encode_fsid(p
, fhp
);
181 p
= xdr_encode_hyper(p
, stat
->ino
);
182 p
= encode_time3(p
, &stat
->atime
);
183 p
= encode_time3(p
, &stat
->mtime
);
184 p
= encode_time3(p
, &stat
->ctime
);
190 encode_saved_post_attr(struct svc_rqst
*rqstp
, __be32
*p
, struct svc_fh
*fhp
)
192 /* Attributes to follow */
194 return encode_fattr3(rqstp
, p
, fhp
, &fhp
->fh_post_attr
);
198 * Encode post-operation attributes.
199 * The inode may be NULL if the call failed because of a stale file
200 * handle. In this case, no attributes are returned.
203 encode_post_op_attr(struct svc_rqst
*rqstp
, __be32
*p
, struct svc_fh
*fhp
)
205 struct dentry
*dentry
= fhp
->fh_dentry
;
206 if (dentry
&& d_really_is_positive(dentry
)) {
210 err
= fh_getattr(fhp
, &stat
);
212 *p
++ = xdr_one
; /* attributes follow */
213 lease_get_mtime(d_inode(dentry
), &stat
.mtime
);
214 return encode_fattr3(rqstp
, p
, fhp
, &stat
);
221 /* Helper for NFSv3 ACLs */
223 nfs3svc_encode_post_op_attr(struct svc_rqst
*rqstp
, __be32
*p
, struct svc_fh
*fhp
)
225 return encode_post_op_attr(rqstp
, p
, fhp
);
229 * Enocde weak cache consistency data
232 encode_wcc_data(struct svc_rqst
*rqstp
, __be32
*p
, struct svc_fh
*fhp
)
234 struct dentry
*dentry
= fhp
->fh_dentry
;
236 if (dentry
&& d_really_is_positive(dentry
) && fhp
->fh_post_saved
) {
237 if (fhp
->fh_pre_saved
) {
239 p
= xdr_encode_hyper(p
, (u64
) fhp
->fh_pre_size
);
240 p
= encode_time3(p
, &fhp
->fh_pre_mtime
);
241 p
= encode_time3(p
, &fhp
->fh_pre_ctime
);
245 return encode_saved_post_attr(rqstp
, p
, fhp
);
247 /* no pre- or post-attrs */
249 return encode_post_op_attr(rqstp
, p
, fhp
);
253 * Fill in the post_op attr for the wcc data
255 void fill_post_wcc(struct svc_fh
*fhp
)
259 if (fhp
->fh_post_saved
)
260 printk("nfsd: inode locked twice during operation.\n");
262 err
= fh_getattr(fhp
, &fhp
->fh_post_attr
);
263 fhp
->fh_post_change
= d_inode(fhp
->fh_dentry
)->i_version
;
265 fhp
->fh_post_saved
= false;
266 /* Grab the ctime anyway - set_change_info might use it */
267 fhp
->fh_post_attr
.ctime
= d_inode(fhp
->fh_dentry
)->i_ctime
;
269 fhp
->fh_post_saved
= true;
273 * XDR decode functions
276 nfs3svc_decode_fhandle(struct svc_rqst
*rqstp
, __be32
*p
, struct nfsd_fhandle
*args
)
278 p
= decode_fh(p
, &args
->fh
);
281 return xdr_argsize_check(rqstp
, p
);
285 nfs3svc_decode_sattrargs(struct svc_rqst
*rqstp
, __be32
*p
,
286 struct nfsd3_sattrargs
*args
)
288 p
= decode_fh(p
, &args
->fh
);
291 p
= decode_sattr3(p
, &args
->attrs
);
293 if ((args
->check_guard
= ntohl(*p
++)) != 0) {
294 struct timespec time
;
295 p
= decode_time3(p
, &time
);
296 args
->guardtime
= time
.tv_sec
;
299 return xdr_argsize_check(rqstp
, p
);
303 nfs3svc_decode_diropargs(struct svc_rqst
*rqstp
, __be32
*p
,
304 struct nfsd3_diropargs
*args
)
306 if (!(p
= decode_fh(p
, &args
->fh
))
307 || !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
310 return xdr_argsize_check(rqstp
, p
);
314 nfs3svc_decode_accessargs(struct svc_rqst
*rqstp
, __be32
*p
,
315 struct nfsd3_accessargs
*args
)
317 p
= decode_fh(p
, &args
->fh
);
320 args
->access
= ntohl(*p
++);
322 return xdr_argsize_check(rqstp
, p
);
326 nfs3svc_decode_readargs(struct svc_rqst
*rqstp
, __be32
*p
,
327 struct nfsd3_readargs
*args
)
331 u32 max_blocksize
= svc_max_payload(rqstp
);
333 p
= decode_fh(p
, &args
->fh
);
336 p
= xdr_decode_hyper(p
, &args
->offset
);
338 args
->count
= ntohl(*p
++);
339 len
= min(args
->count
, max_blocksize
);
341 /* set up the kvec */
344 struct page
*p
= *(rqstp
->rq_next_page
++);
346 rqstp
->rq_vec
[v
].iov_base
= page_address(p
);
347 rqstp
->rq_vec
[v
].iov_len
= min_t(unsigned int, len
, PAGE_SIZE
);
348 len
-= rqstp
->rq_vec
[v
].iov_len
;
352 return xdr_argsize_check(rqstp
, p
);
356 nfs3svc_decode_writeargs(struct svc_rqst
*rqstp
, __be32
*p
,
357 struct nfsd3_writeargs
*args
)
359 unsigned int len
, v
, hdr
, dlen
;
360 u32 max_blocksize
= svc_max_payload(rqstp
);
362 p
= decode_fh(p
, &args
->fh
);
365 p
= xdr_decode_hyper(p
, &args
->offset
);
367 args
->count
= ntohl(*p
++);
368 args
->stable
= ntohl(*p
++);
369 len
= args
->len
= ntohl(*p
++);
371 * The count must equal the amount of data passed.
373 if (args
->count
!= args
->len
)
377 * Check to make sure that we got the right number of
380 hdr
= (void*)p
- rqstp
->rq_arg
.head
[0].iov_base
;
381 dlen
= rqstp
->rq_arg
.head
[0].iov_len
+ rqstp
->rq_arg
.page_len
382 + rqstp
->rq_arg
.tail
[0].iov_len
- hdr
;
384 * Round the length of the data which was specified up to
385 * the next multiple of XDR units and then compare that
386 * against the length which was actually received.
387 * Note that when RPCSEC/GSS (for example) is used, the
388 * data buffer can be padded so dlen might be larger
389 * than required. It must never be smaller.
391 if (dlen
< XDR_QUADLEN(len
)*4)
394 if (args
->count
> max_blocksize
) {
395 args
->count
= max_blocksize
;
396 len
= args
->len
= max_blocksize
;
398 rqstp
->rq_vec
[0].iov_base
= (void*)p
;
399 rqstp
->rq_vec
[0].iov_len
= rqstp
->rq_arg
.head
[0].iov_len
- hdr
;
401 while (len
> rqstp
->rq_vec
[v
].iov_len
) {
402 len
-= rqstp
->rq_vec
[v
].iov_len
;
404 rqstp
->rq_vec
[v
].iov_base
= page_address(rqstp
->rq_pages
[v
]);
405 rqstp
->rq_vec
[v
].iov_len
= PAGE_SIZE
;
407 rqstp
->rq_vec
[v
].iov_len
= len
;
413 nfs3svc_decode_createargs(struct svc_rqst
*rqstp
, __be32
*p
,
414 struct nfsd3_createargs
*args
)
416 if (!(p
= decode_fh(p
, &args
->fh
))
417 || !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
420 switch (args
->createmode
= ntohl(*p
++)) {
421 case NFS3_CREATE_UNCHECKED
:
422 case NFS3_CREATE_GUARDED
:
423 p
= decode_sattr3(p
, &args
->attrs
);
425 case NFS3_CREATE_EXCLUSIVE
:
433 return xdr_argsize_check(rqstp
, p
);
436 nfs3svc_decode_mkdirargs(struct svc_rqst
*rqstp
, __be32
*p
,
437 struct nfsd3_createargs
*args
)
439 if (!(p
= decode_fh(p
, &args
->fh
)) ||
440 !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
442 p
= decode_sattr3(p
, &args
->attrs
);
444 return xdr_argsize_check(rqstp
, p
);
448 nfs3svc_decode_symlinkargs(struct svc_rqst
*rqstp
, __be32
*p
,
449 struct nfsd3_symlinkargs
*args
)
451 unsigned int len
, avail
;
455 if (!(p
= decode_fh(p
, &args
->ffh
)) ||
456 !(p
= decode_filename(p
, &args
->fname
, &args
->flen
))
459 p
= decode_sattr3(p
, &args
->attrs
);
461 /* now decode the pathname, which might be larger than the first page.
462 * As we have to check for nul's anyway, we copy it into a new page
463 * This page appears in the rq_res.pages list, but as pages_len is always
464 * 0, it won't get in the way
467 if (len
== 0 || len
> NFS3_MAXPATHLEN
|| len
>= PAGE_SIZE
)
469 args
->tname
= new = page_address(*(rqstp
->rq_next_page
++));
471 /* first copy and check from the first page */
473 vec
= &rqstp
->rq_arg
.head
[0];
474 avail
= vec
->iov_len
- (old
- (char*)vec
->iov_base
);
475 while (len
&& avail
&& *old
) {
480 /* now copy next page if there is one */
481 if (len
&& !avail
&& rqstp
->rq_arg
.page_len
) {
482 avail
= min_t(unsigned int, rqstp
->rq_arg
.page_len
, PAGE_SIZE
);
483 old
= page_address(rqstp
->rq_arg
.pages
[0]);
485 while (len
&& avail
&& *old
) {
498 nfs3svc_decode_mknodargs(struct svc_rqst
*rqstp
, __be32
*p
,
499 struct nfsd3_mknodargs
*args
)
501 if (!(p
= decode_fh(p
, &args
->fh
))
502 || !(p
= decode_filename(p
, &args
->name
, &args
->len
)))
505 args
->ftype
= ntohl(*p
++);
507 if (args
->ftype
== NF3BLK
|| args
->ftype
== NF3CHR
508 || args
->ftype
== NF3SOCK
|| args
->ftype
== NF3FIFO
)
509 p
= decode_sattr3(p
, &args
->attrs
);
511 if (args
->ftype
== NF3BLK
|| args
->ftype
== NF3CHR
) {
512 args
->major
= ntohl(*p
++);
513 args
->minor
= ntohl(*p
++);
516 return xdr_argsize_check(rqstp
, p
);
520 nfs3svc_decode_renameargs(struct svc_rqst
*rqstp
, __be32
*p
,
521 struct nfsd3_renameargs
*args
)
523 if (!(p
= decode_fh(p
, &args
->ffh
))
524 || !(p
= decode_filename(p
, &args
->fname
, &args
->flen
))
525 || !(p
= decode_fh(p
, &args
->tfh
))
526 || !(p
= decode_filename(p
, &args
->tname
, &args
->tlen
)))
529 return xdr_argsize_check(rqstp
, p
);
533 nfs3svc_decode_readlinkargs(struct svc_rqst
*rqstp
, __be32
*p
,
534 struct nfsd3_readlinkargs
*args
)
536 p
= decode_fh(p
, &args
->fh
);
539 args
->buffer
= page_address(*(rqstp
->rq_next_page
++));
541 return xdr_argsize_check(rqstp
, p
);
545 nfs3svc_decode_linkargs(struct svc_rqst
*rqstp
, __be32
*p
,
546 struct nfsd3_linkargs
*args
)
548 if (!(p
= decode_fh(p
, &args
->ffh
))
549 || !(p
= decode_fh(p
, &args
->tfh
))
550 || !(p
= decode_filename(p
, &args
->tname
, &args
->tlen
)))
553 return xdr_argsize_check(rqstp
, p
);
557 nfs3svc_decode_readdirargs(struct svc_rqst
*rqstp
, __be32
*p
,
558 struct nfsd3_readdirargs
*args
)
560 p
= decode_fh(p
, &args
->fh
);
563 p
= xdr_decode_hyper(p
, &args
->cookie
);
564 args
->verf
= p
; p
+= 2;
566 args
->count
= ntohl(*p
++);
567 args
->count
= min_t(u32
, args
->count
, PAGE_SIZE
);
568 args
->buffer
= page_address(*(rqstp
->rq_next_page
++));
570 return xdr_argsize_check(rqstp
, p
);
574 nfs3svc_decode_readdirplusargs(struct svc_rqst
*rqstp
, __be32
*p
,
575 struct nfsd3_readdirargs
*args
)
578 u32 max_blocksize
= svc_max_payload(rqstp
);
580 p
= decode_fh(p
, &args
->fh
);
583 p
= xdr_decode_hyper(p
, &args
->cookie
);
584 args
->verf
= p
; p
+= 2;
585 args
->dircount
= ntohl(*p
++);
586 args
->count
= ntohl(*p
++);
588 len
= args
->count
= min(args
->count
, max_blocksize
);
590 struct page
*p
= *(rqstp
->rq_next_page
++);
592 args
->buffer
= page_address(p
);
596 return xdr_argsize_check(rqstp
, p
);
600 nfs3svc_decode_commitargs(struct svc_rqst
*rqstp
, __be32
*p
,
601 struct nfsd3_commitargs
*args
)
603 p
= decode_fh(p
, &args
->fh
);
606 p
= xdr_decode_hyper(p
, &args
->offset
);
607 args
->count
= ntohl(*p
++);
609 return xdr_argsize_check(rqstp
, p
);
613 * XDR encode functions
616 * There must be an encoding function for void results so svc_process
617 * will work properly.
620 nfs3svc_encode_voidres(struct svc_rqst
*rqstp
, __be32
*p
, void *dummy
)
622 return xdr_ressize_check(rqstp
, p
);
627 nfs3svc_encode_attrstat(struct svc_rqst
*rqstp
, __be32
*p
,
628 struct nfsd3_attrstat
*resp
)
630 if (resp
->status
== 0) {
631 lease_get_mtime(d_inode(resp
->fh
.fh_dentry
),
633 p
= encode_fattr3(rqstp
, p
, &resp
->fh
, &resp
->stat
);
635 return xdr_ressize_check(rqstp
, p
);
638 /* SETATTR, REMOVE, RMDIR */
640 nfs3svc_encode_wccstat(struct svc_rqst
*rqstp
, __be32
*p
,
641 struct nfsd3_attrstat
*resp
)
643 p
= encode_wcc_data(rqstp
, p
, &resp
->fh
);
644 return xdr_ressize_check(rqstp
, p
);
649 nfs3svc_encode_diropres(struct svc_rqst
*rqstp
, __be32
*p
,
650 struct nfsd3_diropres
*resp
)
652 if (resp
->status
== 0) {
653 p
= encode_fh(p
, &resp
->fh
);
654 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
656 p
= encode_post_op_attr(rqstp
, p
, &resp
->dirfh
);
657 return xdr_ressize_check(rqstp
, p
);
662 nfs3svc_encode_accessres(struct svc_rqst
*rqstp
, __be32
*p
,
663 struct nfsd3_accessres
*resp
)
665 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
666 if (resp
->status
== 0)
667 *p
++ = htonl(resp
->access
);
668 return xdr_ressize_check(rqstp
, p
);
673 nfs3svc_encode_readlinkres(struct svc_rqst
*rqstp
, __be32
*p
,
674 struct nfsd3_readlinkres
*resp
)
676 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
677 if (resp
->status
== 0) {
678 *p
++ = htonl(resp
->len
);
679 xdr_ressize_check(rqstp
, p
);
680 rqstp
->rq_res
.page_len
= resp
->len
;
682 /* need to pad the tail */
683 rqstp
->rq_res
.tail
[0].iov_base
= p
;
685 rqstp
->rq_res
.tail
[0].iov_len
= 4 - (resp
->len
&3);
689 return xdr_ressize_check(rqstp
, p
);
694 nfs3svc_encode_readres(struct svc_rqst
*rqstp
, __be32
*p
,
695 struct nfsd3_readres
*resp
)
697 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
698 if (resp
->status
== 0) {
699 *p
++ = htonl(resp
->count
);
700 *p
++ = htonl(resp
->eof
);
701 *p
++ = htonl(resp
->count
); /* xdr opaque count */
702 xdr_ressize_check(rqstp
, p
);
703 /* now update rqstp->rq_res to reflect data as well */
704 rqstp
->rq_res
.page_len
= resp
->count
;
705 if (resp
->count
& 3) {
706 /* need to pad the tail */
707 rqstp
->rq_res
.tail
[0].iov_base
= p
;
709 rqstp
->rq_res
.tail
[0].iov_len
= 4 - (resp
->count
& 3);
713 return xdr_ressize_check(rqstp
, p
);
718 nfs3svc_encode_writeres(struct svc_rqst
*rqstp
, __be32
*p
,
719 struct nfsd3_writeres
*resp
)
721 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
723 p
= encode_wcc_data(rqstp
, p
, &resp
->fh
);
724 if (resp
->status
== 0) {
725 *p
++ = htonl(resp
->count
);
726 *p
++ = htonl(resp
->committed
);
727 *p
++ = htonl(nn
->nfssvc_boot
.tv_sec
);
728 *p
++ = htonl(nn
->nfssvc_boot
.tv_usec
);
730 return xdr_ressize_check(rqstp
, p
);
733 /* CREATE, MKDIR, SYMLINK, MKNOD */
735 nfs3svc_encode_createres(struct svc_rqst
*rqstp
, __be32
*p
,
736 struct nfsd3_diropres
*resp
)
738 if (resp
->status
== 0) {
740 p
= encode_fh(p
, &resp
->fh
);
741 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
743 p
= encode_wcc_data(rqstp
, p
, &resp
->dirfh
);
744 return xdr_ressize_check(rqstp
, p
);
749 nfs3svc_encode_renameres(struct svc_rqst
*rqstp
, __be32
*p
,
750 struct nfsd3_renameres
*resp
)
752 p
= encode_wcc_data(rqstp
, p
, &resp
->ffh
);
753 p
= encode_wcc_data(rqstp
, p
, &resp
->tfh
);
754 return xdr_ressize_check(rqstp
, p
);
759 nfs3svc_encode_linkres(struct svc_rqst
*rqstp
, __be32
*p
,
760 struct nfsd3_linkres
*resp
)
762 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
763 p
= encode_wcc_data(rqstp
, p
, &resp
->tfh
);
764 return xdr_ressize_check(rqstp
, p
);
769 nfs3svc_encode_readdirres(struct svc_rqst
*rqstp
, __be32
*p
,
770 struct nfsd3_readdirres
*resp
)
772 p
= encode_post_op_attr(rqstp
, p
, &resp
->fh
);
774 if (resp
->status
== 0) {
775 /* stupid readdir cookie */
776 memcpy(p
, resp
->verf
, 8); p
+= 2;
777 xdr_ressize_check(rqstp
, p
);
778 if (rqstp
->rq_res
.head
[0].iov_len
+ (2<<2) > PAGE_SIZE
)
779 return 1; /*No room for trailer */
780 rqstp
->rq_res
.page_len
= (resp
->count
) << 2;
782 /* add the 'tail' to the end of the 'head' page - page 0. */
783 rqstp
->rq_res
.tail
[0].iov_base
= p
;
784 *p
++ = 0; /* no more entries */
785 *p
++ = htonl(resp
->common
.err
== nfserr_eof
);
786 rqstp
->rq_res
.tail
[0].iov_len
= 2<<2;
789 return xdr_ressize_check(rqstp
, p
);
793 encode_entry_baggage(struct nfsd3_readdirres
*cd
, __be32
*p
, const char *name
,
796 *p
++ = xdr_one
; /* mark entry present */
797 p
= xdr_encode_hyper(p
, ino
); /* file id */
798 p
= xdr_encode_array(p
, name
, namlen
);/* name length & name */
800 cd
->offset
= p
; /* remember pointer */
801 p
= xdr_encode_hyper(p
, NFS_OFFSET_MAX
);/* offset of next entry */
807 compose_entry_fh(struct nfsd3_readdirres
*cd
, struct svc_fh
*fhp
,
808 const char *name
, int namlen
, u64 ino
)
810 struct svc_export
*exp
;
811 struct dentry
*dparent
, *dchild
;
812 __be32 rv
= nfserr_noent
;
814 dparent
= cd
->fh
.fh_dentry
;
815 exp
= cd
->fh
.fh_export
;
817 if (isdotent(name
, namlen
)) {
819 dchild
= dget_parent(dparent
);
820 /* filesystem root - cannot return filehandle for ".." */
821 if (dchild
== dparent
)
824 dchild
= dget(dparent
);
826 dchild
= lookup_one_len_unlocked(name
, dparent
, namlen
);
829 if (d_mountpoint(dchild
))
831 if (d_really_is_negative(dchild
))
833 if (dchild
->d_inode
->i_ino
!= ino
)
835 rv
= fh_compose(fhp
, exp
, dchild
, &cd
->fh
);
841 static __be32
*encode_entryplus_baggage(struct nfsd3_readdirres
*cd
, __be32
*p
, const char *name
, int namlen
, u64 ino
)
843 struct svc_fh
*fh
= &cd
->scratch
;
846 fh_init(fh
, NFS3_FHSIZE
);
847 err
= compose_entry_fh(cd
, fh
, name
, namlen
, ino
);
853 p
= encode_post_op_attr(cd
->rqstp
, p
, fh
);
854 *p
++ = xdr_one
; /* yes, a file handle follows */
855 p
= encode_fh(p
, fh
);
862 * Encode a directory entry. This one works for both normal readdir
864 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
865 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
867 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
871 #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
872 #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
874 encode_entry(struct readdir_cd
*ccd
, const char *name
, int namlen
,
875 loff_t offset
, u64 ino
, unsigned int d_type
, int plus
)
877 struct nfsd3_readdirres
*cd
= container_of(ccd
, struct nfsd3_readdirres
,
879 __be32
*p
= cd
->buffer
;
880 caddr_t curr_page_addr
= NULL
;
882 int slen
; /* string (name) length */
883 int elen
; /* estimated entry length in words */
884 int num_entry_words
= 0; /* actual number of words */
887 u64 offset64
= offset
;
889 if (unlikely(cd
->offset1
)) {
890 /* we ended up with offset on a page boundary */
891 *cd
->offset
= htonl(offset64
>> 32);
892 *cd
->offset1
= htonl(offset64
& 0xffffffff);
895 xdr_encode_hyper(cd
->offset
, offset64
);
900 dprintk("encode_entry(%.*s @%ld%s)\n",
901 namlen, name, (long) offset, plus? " plus" : "");
904 /* truncate filename if too long */
905 namlen
= min(namlen
, NFS3_MAXNAMLEN
);
907 slen
= XDR_QUADLEN(namlen
);
908 elen
= slen
+ NFS3_ENTRY_BAGGAGE
909 + (plus
? NFS3_ENTRYPLUS_BAGGAGE
: 0);
911 if (cd
->buflen
< elen
) {
912 cd
->common
.err
= nfserr_toosmall
;
916 /* determine which page in rq_respages[] we are currently filling */
917 for (page
= cd
->rqstp
->rq_respages
+ 1;
918 page
< cd
->rqstp
->rq_next_page
; page
++) {
919 curr_page_addr
= page_address(*page
);
921 if (((caddr_t
)cd
->buffer
>= curr_page_addr
) &&
922 ((caddr_t
)cd
->buffer
< curr_page_addr
+ PAGE_SIZE
))
926 if ((caddr_t
)(cd
->buffer
+ elen
) < (curr_page_addr
+ PAGE_SIZE
)) {
927 /* encode entry in current page */
929 p
= encode_entry_baggage(cd
, p
, name
, namlen
, ino
);
932 p
= encode_entryplus_baggage(cd
, p
, name
, namlen
, ino
);
933 num_entry_words
= p
- cd
->buffer
;
934 } else if (*(page
+1) != NULL
) {
935 /* temporarily encode entry into next page, then move back to
936 * current and next page in rq_respages[] */
940 /* grab next page for temporary storage of entry */
941 p1
= tmp
= page_address(*(page
+1));
943 p1
= encode_entry_baggage(cd
, p1
, name
, namlen
, ino
);
946 p1
= encode_entryplus_baggage(cd
, p1
, name
, namlen
, ino
);
948 /* determine entry word length and lengths to go in pages */
949 num_entry_words
= p1
- tmp
;
950 len1
= curr_page_addr
+ PAGE_SIZE
- (caddr_t
)cd
->buffer
;
951 if ((num_entry_words
<< 2) < len1
) {
952 /* the actual number of words in the entry is less
953 * than elen and can still fit in the current page
955 memmove(p
, tmp
, num_entry_words
<< 2);
956 p
+= num_entry_words
;
959 cd
->offset
= cd
->buffer
+ (cd
->offset
- tmp
);
961 unsigned int offset_r
= (cd
->offset
- tmp
) << 2;
963 /* update pointer to offset location.
964 * This is a 64bit quantity, so we need to
966 * - entirely in first page
967 * - entirely in second page
968 * - 4 bytes in each page
970 if (offset_r
+ 8 <= len1
) {
971 cd
->offset
= p
+ (cd
->offset
- tmp
);
972 } else if (offset_r
>= len1
) {
973 cd
->offset
-= len1
>> 2;
975 /* sitting on the fence */
976 BUG_ON(offset_r
!= len1
- 4);
977 cd
->offset
= p
+ (cd
->offset
- tmp
);
981 len2
= (num_entry_words
<< 2) - len1
;
983 /* move from temp page to current and next pages */
984 memmove(p
, tmp
, len1
);
985 memmove(tmp
, (caddr_t
)tmp
+len1
, len2
);
987 p
= tmp
+ (len2
>> 2);
991 cd
->common
.err
= nfserr_toosmall
;
995 cd
->buflen
-= num_entry_words
;
997 cd
->common
.err
= nfs_ok
;
1003 nfs3svc_encode_entry(void *cd
, const char *name
,
1004 int namlen
, loff_t offset
, u64 ino
, unsigned int d_type
)
1006 return encode_entry(cd
, name
, namlen
, offset
, ino
, d_type
, 0);
1010 nfs3svc_encode_entry_plus(void *cd
, const char *name
,
1011 int namlen
, loff_t offset
, u64 ino
,
1012 unsigned int d_type
)
1014 return encode_entry(cd
, name
, namlen
, offset
, ino
, d_type
, 1);
1019 nfs3svc_encode_fsstatres(struct svc_rqst
*rqstp
, __be32
*p
,
1020 struct nfsd3_fsstatres
*resp
)
1022 struct kstatfs
*s
= &resp
->stats
;
1023 u64 bs
= s
->f_bsize
;
1025 *p
++ = xdr_zero
; /* no post_op_attr */
1027 if (resp
->status
== 0) {
1028 p
= xdr_encode_hyper(p
, bs
* s
->f_blocks
); /* total bytes */
1029 p
= xdr_encode_hyper(p
, bs
* s
->f_bfree
); /* free bytes */
1030 p
= xdr_encode_hyper(p
, bs
* s
->f_bavail
); /* user available bytes */
1031 p
= xdr_encode_hyper(p
, s
->f_files
); /* total inodes */
1032 p
= xdr_encode_hyper(p
, s
->f_ffree
); /* free inodes */
1033 p
= xdr_encode_hyper(p
, s
->f_ffree
); /* user available inodes */
1034 *p
++ = htonl(resp
->invarsec
); /* mean unchanged time */
1036 return xdr_ressize_check(rqstp
, p
);
1041 nfs3svc_encode_fsinfores(struct svc_rqst
*rqstp
, __be32
*p
,
1042 struct nfsd3_fsinfores
*resp
)
1044 *p
++ = xdr_zero
; /* no post_op_attr */
1046 if (resp
->status
== 0) {
1047 *p
++ = htonl(resp
->f_rtmax
);
1048 *p
++ = htonl(resp
->f_rtpref
);
1049 *p
++ = htonl(resp
->f_rtmult
);
1050 *p
++ = htonl(resp
->f_wtmax
);
1051 *p
++ = htonl(resp
->f_wtpref
);
1052 *p
++ = htonl(resp
->f_wtmult
);
1053 *p
++ = htonl(resp
->f_dtpref
);
1054 p
= xdr_encode_hyper(p
, resp
->f_maxfilesize
);
1057 *p
++ = htonl(resp
->f_properties
);
1060 return xdr_ressize_check(rqstp
, p
);
1065 nfs3svc_encode_pathconfres(struct svc_rqst
*rqstp
, __be32
*p
,
1066 struct nfsd3_pathconfres
*resp
)
1068 *p
++ = xdr_zero
; /* no post_op_attr */
1070 if (resp
->status
== 0) {
1071 *p
++ = htonl(resp
->p_link_max
);
1072 *p
++ = htonl(resp
->p_name_max
);
1073 *p
++ = htonl(resp
->p_no_trunc
);
1074 *p
++ = htonl(resp
->p_chown_restricted
);
1075 *p
++ = htonl(resp
->p_case_insensitive
);
1076 *p
++ = htonl(resp
->p_case_preserving
);
1079 return xdr_ressize_check(rqstp
, p
);
1084 nfs3svc_encode_commitres(struct svc_rqst
*rqstp
, __be32
*p
,
1085 struct nfsd3_commitres
*resp
)
1087 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1089 p
= encode_wcc_data(rqstp
, p
, &resp
->fh
);
1090 /* Write verifier */
1091 if (resp
->status
== 0) {
1092 *p
++ = htonl(nn
->nfssvc_boot
.tv_sec
);
1093 *p
++ = htonl(nn
->nfssvc_boot
.tv_usec
);
1095 return xdr_ressize_check(rqstp
, p
);
1099 * XDR release functions
1102 nfs3svc_release_fhandle(struct svc_rqst
*rqstp
, __be32
*p
,
1103 struct nfsd3_attrstat
*resp
)
1110 nfs3svc_release_fhandle2(struct svc_rqst
*rqstp
, __be32
*p
,
1111 struct nfsd3_fhandle_pair
*resp
)
This page took 0.052061 seconds and 5 git commands to generate.