2 * XDR support for nfsd/protocol version 3.
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);
361 struct kvec *head = rqstp->rq_arg.head;
362 struct kvec *tail = rqstp->rq_arg.tail;
364 p = decode_fh(p, &args->fh);
367 p = xdr_decode_hyper(p, &args->offset);
369 args->count = ntohl(*p++);
370 args->stable = ntohl(*p++);
371 len = args->len = ntohl(*p++);
372 if ((void *)p > head->iov_base + head->iov_len)
375 * The count must equal the amount of data passed.
377 if (args->count != args->len)
381 * Check to make sure that we got the right number of
384 hdr = (void*)p - head->iov_base;
385 dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr;
387 * Round the length of the data which was specified up to
388 * the next multiple of XDR units and then compare that
389 * against the length which was actually received.
390 * Note that when RPCSEC/GSS (for example) is used, the
391 * data buffer can be padded so dlen might be larger
392 * than required. It must never be smaller.
394 if (dlen < XDR_QUADLEN(len)*4)
397 if (args->count > max_blocksize) {
398 args->count = max_blocksize;
399 len = args->len = max_blocksize;
401 rqstp->rq_vec[0].iov_base = (void*)p;
402 rqstp->rq_vec[0].iov_len = head->iov_len - hdr;
404 while (len > rqstp->rq_vec[v].iov_len) {
405 len -= rqstp->rq_vec[v].iov_len;
407 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
408 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
410 rqstp->rq_vec[v].iov_len = len;
416 nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
417 struct nfsd3_createargs *args)
419 if (!(p = decode_fh(p, &args->fh))
420 || !(p = decode_filename(p, &args->name, &args->len)))
423 switch (args->createmode = ntohl(*p++)) {
424 case NFS3_CREATE_UNCHECKED:
425 case NFS3_CREATE_GUARDED:
426 p = decode_sattr3(p, &args->attrs);
428 case NFS3_CREATE_EXCLUSIVE:
436 return xdr_argsize_check(rqstp, p);
439 nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p,
440 struct nfsd3_createargs *args)
442 if (!(p = decode_fh(p, &args->fh)) ||
443 !(p = decode_filename(p, &args->name, &args->len)))
445 p = decode_sattr3(p, &args->attrs);
447 return xdr_argsize_check(rqstp, p);
451 nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
452 struct nfsd3_symlinkargs *args)
454 unsigned int len, avail;
458 if (!(p = decode_fh(p, &args->ffh)) ||
459 !(p = decode_filename(p, &args->fname, &args->flen))
462 p = decode_sattr3(p, &args->attrs);
464 /* now decode the pathname, which might be larger than the first page.
465 * As we have to check for nul's anyway, we copy it into a new page
466 * This page appears in the rq_res.pages list, but as pages_len is always
467 * 0, it won't get in the way
470 if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
472 args->tname = new = page_address(*(rqstp->rq_next_page++));
474 /* first copy and check from the first page */
476 vec = &rqstp->rq_arg.head[0];
477 if ((void *)old > vec->iov_base + vec->iov_len)
479 avail = vec->iov_len - (old - (char*)vec->iov_base);
480 while (len && avail && *old) {
485 /* now copy next page if there is one */
486 if (len && !avail && rqstp->rq_arg.page_len) {
487 avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE);
488 old = page_address(rqstp->rq_arg.pages[0]);
490 while (len && avail && *old) {
503 nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p,
504 struct nfsd3_mknodargs *args)
506 if (!(p = decode_fh(p, &args->fh))
507 || !(p = decode_filename(p, &args->name, &args->len)))
510 args->ftype = ntohl(*p++);
512 if (args->ftype == NF3BLK || args->ftype == NF3CHR
513 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
514 p = decode_sattr3(p, &args->attrs);
516 if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
517 args->major = ntohl(*p++);
518 args->minor = ntohl(*p++);
521 return xdr_argsize_check(rqstp, p);
525 nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
526 struct nfsd3_renameargs *args)
528 if (!(p = decode_fh(p, &args->ffh))
529 || !(p = decode_filename(p, &args->fname, &args->flen))
530 || !(p = decode_fh(p, &args->tfh))
531 || !(p = decode_filename(p, &args->tname, &args->tlen)))
534 return xdr_argsize_check(rqstp, p);
538 nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
539 struct nfsd3_readlinkargs *args)
541 p = decode_fh(p, &args->fh);
544 args->buffer = page_address(*(rqstp->rq_next_page++));
546 return xdr_argsize_check(rqstp, p);
550 nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
551 struct nfsd3_linkargs *args)
553 if (!(p = decode_fh(p, &args->ffh))
554 || !(p = decode_fh(p, &args->tfh))
555 || !(p = decode_filename(p, &args->tname, &args->tlen)))
558 return xdr_argsize_check(rqstp, p);
562 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
563 struct nfsd3_readdirargs *args)
565 p = decode_fh(p, &args->fh);
568 p = xdr_decode_hyper(p, &args->cookie);
569 args->verf = p; p += 2;
571 args->count = ntohl(*p++);
572 args->count = min_t(u32, args->count, PAGE_SIZE);
573 args->buffer = page_address(*(rqstp->rq_next_page++));
575 return xdr_argsize_check(rqstp, p);
579 nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
580 struct nfsd3_readdirargs *args)
583 u32 max_blocksize = svc_max_payload(rqstp);
585 p = decode_fh(p, &args->fh);
588 p = xdr_decode_hyper(p, &args->cookie);
589 args->verf = p; p += 2;
590 args->dircount = ntohl(*p++);
591 args->count = ntohl(*p++);
593 len = args->count = min(args->count, max_blocksize);
595 struct page *p = *(rqstp->rq_next_page++);
597 args->buffer = page_address(p);
601 return xdr_argsize_check(rqstp, p);
605 nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p,
606 struct nfsd3_commitargs *args)
608 p = decode_fh(p, &args->fh);
611 p = xdr_decode_hyper(p, &args->offset);
612 args->count = ntohl(*p++);
614 return xdr_argsize_check(rqstp, p);
618 * XDR encode functions
621 * There must be an encoding function for void results so svc_process
622 * will work properly.
625 nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
627 return xdr_ressize_check(rqstp, p);
632 nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
633 struct nfsd3_attrstat *resp)
635 if (resp->status == 0) {
636 lease_get_mtime(d_inode(resp->fh.fh_dentry),
638 p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
640 return xdr_ressize_check(rqstp, p);
643 /* SETATTR, REMOVE, RMDIR */
645 nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p,
646 struct nfsd3_attrstat *resp)
648 p = encode_wcc_data(rqstp, p, &resp->fh);
649 return xdr_ressize_check(rqstp, p);
654 nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
655 struct nfsd3_diropres *resp)
657 if (resp->status == 0) {
658 p = encode_fh(p, &resp->fh);
659 p = encode_post_op_attr(rqstp, p, &resp->fh);
661 p = encode_post_op_attr(rqstp, p, &resp->dirfh);
662 return xdr_ressize_check(rqstp, p);
667 nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
668 struct nfsd3_accessres *resp)
670 p = encode_post_op_attr(rqstp, p, &resp->fh);
671 if (resp->status == 0)
672 *p++ = htonl(resp->access);
673 return xdr_ressize_check(rqstp, p);
678 nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
679 struct nfsd3_readlinkres *resp)
681 p = encode_post_op_attr(rqstp, p, &resp->fh);
682 if (resp->status == 0) {
683 *p++ = htonl(resp->len);
684 xdr_ressize_check(rqstp, p);
685 rqstp->rq_res.page_len = resp->len;
687 /* need to pad the tail */
688 rqstp->rq_res.tail[0].iov_base = p;
690 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
694 return xdr_ressize_check(rqstp, p);
699 nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
700 struct nfsd3_readres *resp)
702 p = encode_post_op_attr(rqstp, p, &resp->fh);
703 if (resp->status == 0) {
704 *p++ = htonl(resp->count);
705 *p++ = htonl(resp->eof);
706 *p++ = htonl(resp->count); /* xdr opaque count */
707 xdr_ressize_check(rqstp, p);
708 /* now update rqstp->rq_res to reflect data as well */
709 rqstp->rq_res.page_len = resp->count;
710 if (resp->count & 3) {
711 /* need to pad the tail */
712 rqstp->rq_res.tail[0].iov_base = p;
714 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
718 return xdr_ressize_check(rqstp, p);
723 nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p,
724 struct nfsd3_writeres *resp)
726 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
728 p = encode_wcc_data(rqstp, p, &resp->fh);
729 if (resp->status == 0) {
730 *p++ = htonl(resp->count);
731 *p++ = htonl(resp->committed);
732 *p++ = htonl(nn->nfssvc_boot.tv_sec);
733 *p++ = htonl(nn->nfssvc_boot.tv_usec);
735 return xdr_ressize_check(rqstp, p);
738 /* CREATE, MKDIR, SYMLINK, MKNOD */
740 nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p,
741 struct nfsd3_diropres *resp)
743 if (resp->status == 0) {
745 p = encode_fh(p, &resp->fh);
746 p = encode_post_op_attr(rqstp, p, &resp->fh);
748 p = encode_wcc_data(rqstp, p, &resp->dirfh);
749 return xdr_ressize_check(rqstp, p);
754 nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p,
755 struct nfsd3_renameres *resp)
757 p = encode_wcc_data(rqstp, p, &resp->ffh);
758 p = encode_wcc_data(rqstp, p, &resp->tfh);
759 return xdr_ressize_check(rqstp, p);
764 nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p,
765 struct nfsd3_linkres *resp)
767 p = encode_post_op_attr(rqstp, p, &resp->fh);
768 p = encode_wcc_data(rqstp, p, &resp->tfh);
769 return xdr_ressize_check(rqstp, p);
774 nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
775 struct nfsd3_readdirres *resp)
777 p = encode_post_op_attr(rqstp, p, &resp->fh);
779 if (resp->status == 0) {
780 /* stupid readdir cookie */
781 memcpy(p, resp->verf, 8); p += 2;
782 xdr_ressize_check(rqstp, p);
783 if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
784 return 1; /*No room for trailer */
785 rqstp->rq_res.page_len = (resp->count) << 2;
787 /* add the 'tail' to the end of the 'head' page - page 0. */
788 rqstp->rq_res.tail[0].iov_base = p;
789 *p++ = 0; /* no more entries */
790 *p++ = htonl(resp->common.err == nfserr_eof);
791 rqstp->rq_res.tail[0].iov_len = 2<<2;
794 return xdr_ressize_check(rqstp, p);
798 encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
801 *p++ = xdr_one; /* mark entry present */
802 p = xdr_encode_hyper(p, ino); /* file id */
803 p = xdr_encode_array(p, name, namlen);/* name length & name */
805 cd->offset = p; /* remember pointer */
806 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
812 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
813 const char *name, int namlen, u64 ino)
815 struct svc_export *exp;
816 struct dentry *dparent, *dchild;
817 __be32 rv = nfserr_noent;
819 dparent = cd->fh.fh_dentry;
820 exp = cd->fh.fh_export;
822 if (isdotent(name, namlen)) {
824 dchild = dget_parent(dparent);
825 /* filesystem root - cannot return filehandle for ".." */
826 if (dchild == dparent)
829 dchild = dget(dparent);
831 dchild = lookup_one_len_unlocked(name, dparent, namlen);
834 if (d_mountpoint(dchild))
836 if (d_really_is_negative(dchild))
838 if (dchild->d_inode->i_ino != ino)
840 rv = fh_compose(fhp, exp, dchild, &cd->fh);
846 static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino)
848 struct svc_fh *fh = &cd->scratch;
851 fh_init(fh, NFS3_FHSIZE);
852 err = compose_entry_fh(cd, fh, name, namlen, ino);
858 p = encode_post_op_attr(cd->rqstp, p, fh);
859 *p++ = xdr_one; /* yes, a file handle follows */
860 p = encode_fh(p, fh);
867 * Encode a directory entry. This one works for both normal readdir
869 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
870 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
872 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
876 #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
877 #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
879 encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
880 loff_t offset, u64 ino, unsigned int d_type, int plus)
882 struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
884 __be32 *p = cd->buffer;
885 caddr_t curr_page_addr = NULL;
887 int slen; /* string (name) length */
888 int elen; /* estimated entry length in words */
889 int num_entry_words = 0; /* actual number of words */
892 u64 offset64 = offset;
894 if (unlikely(cd->offset1)) {
895 /* we ended up with offset on a page boundary */
896 *cd->offset = htonl(offset64 >> 32);
897 *cd->offset1 = htonl(offset64 & 0xffffffff);
900 xdr_encode_hyper(cd->offset, offset64);
905 dprintk("encode_entry(%.*s @%ld%s)\n",
906 namlen, name, (long) offset, plus? " plus" : "");
909 /* truncate filename if too long */
910 namlen = min(namlen, NFS3_MAXNAMLEN);
912 slen = XDR_QUADLEN(namlen);
913 elen = slen + NFS3_ENTRY_BAGGAGE
914 + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
916 if (cd->buflen < elen) {
917 cd->common.err = nfserr_toosmall;
921 /* determine which page in rq_respages[] we are currently filling */
922 for (page = cd->rqstp->rq_respages + 1;
923 page < cd->rqstp->rq_next_page; page++) {
924 curr_page_addr = page_address(*page);
926 if (((caddr_t)cd->buffer >= curr_page_addr) &&
927 ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
931 if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
932 /* encode entry in current page */
934 p = encode_entry_baggage(cd, p, name, namlen, ino);
937 p = encode_entryplus_baggage(cd, p, name, namlen, ino);
938 num_entry_words = p - cd->buffer;
939 } else if (*(page+1) != NULL) {
940 /* temporarily encode entry into next page, then move back to
941 * current and next page in rq_respages[] */
945 /* grab next page for temporary storage of entry */
946 p1 = tmp = page_address(*(page+1));
948 p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
951 p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino);
953 /* determine entry word length and lengths to go in pages */
954 num_entry_words = p1 - tmp;
955 len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
956 if ((num_entry_words << 2) < len1) {
957 /* the actual number of words in the entry is less
958 * than elen and can still fit in the current page
960 memmove(p, tmp, num_entry_words << 2);
961 p += num_entry_words;
964 cd->offset = cd->buffer + (cd->offset - tmp);
966 unsigned int offset_r = (cd->offset - tmp) << 2;
968 /* update pointer to offset location.
969 * This is a 64bit quantity, so we need to
971 * - entirely in first page
972 * - entirely in second page
973 * - 4 bytes in each page
975 if (offset_r + 8 <= len1) {
976 cd->offset = p + (cd->offset - tmp);
977 } else if (offset_r >= len1) {
978 cd->offset -= len1 >> 2;
980 /* sitting on the fence */
981 BUG_ON(offset_r != len1 - 4);
982 cd->offset = p + (cd->offset - tmp);
986 len2 = (num_entry_words << 2) - len1;
988 /* move from temp page to current and next pages */
989 memmove(p, tmp, len1);
990 memmove(tmp, (caddr_t)tmp+len1, len2);
992 p = tmp + (len2 >> 2);
996 cd->common.err = nfserr_toosmall;
1000 cd->buflen -= num_entry_words;
1002 cd->common.err = nfs_ok;
1008 nfs3svc_encode_entry(void *cd, const char *name,
1009 int namlen, loff_t offset, u64 ino, unsigned int d_type)
1011 return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
1015 nfs3svc_encode_entry_plus(void *cd, const char *name,
1016 int namlen, loff_t offset, u64 ino,
1017 unsigned int d_type)
1019 return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
1024 nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p,
1025 struct nfsd3_fsstatres *resp)
1027 struct kstatfs *s = &resp->stats;
1028 u64 bs = s->f_bsize;
1030 *p++ = xdr_zero; /* no post_op_attr */
1032 if (resp->status == 0) {
1033 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
1034 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
1035 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
1036 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
1037 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
1038 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
1039 *p++ = htonl(resp->invarsec); /* mean unchanged time */
1041 return xdr_ressize_check(rqstp, p);
1046 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p,
1047 struct nfsd3_fsinfores *resp)
1049 *p++ = xdr_zero; /* no post_op_attr */
1051 if (resp->status == 0) {
1052 *p++ = htonl(resp->f_rtmax);
1053 *p++ = htonl(resp->f_rtpref);
1054 *p++ = htonl(resp->f_rtmult);
1055 *p++ = htonl(resp->f_wtmax);
1056 *p++ = htonl(resp->f_wtpref);
1057 *p++ = htonl(resp->f_wtmult);
1058 *p++ = htonl(resp->f_dtpref);
1059 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1062 *p++ = htonl(resp->f_properties);
1065 return xdr_ressize_check(rqstp, p);
1070 nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p,
1071 struct nfsd3_pathconfres *resp)
1073 *p++ = xdr_zero; /* no post_op_attr */
1075 if (resp->status == 0) {
1076 *p++ = htonl(resp->p_link_max);
1077 *p++ = htonl(resp->p_name_max);
1078 *p++ = htonl(resp->p_no_trunc);
1079 *p++ = htonl(resp->p_chown_restricted);
1080 *p++ = htonl(resp->p_case_insensitive);
1081 *p++ = htonl(resp->p_case_preserving);
1084 return xdr_ressize_check(rqstp, p);
1089 nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p,
1090 struct nfsd3_commitres *resp)
1092 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1094 p = encode_wcc_data(rqstp, p, &resp->fh);
1095 /* Write verifier */
1096 if (resp->status == 0) {
1097 *p++ = htonl(nn->nfssvc_boot.tv_sec);
1098 *p++ = htonl(nn->nfssvc_boot.tv_usec);
1100 return xdr_ressize_check(rqstp, p);
1104 * XDR release functions
1107 nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
1108 struct nfsd3_attrstat *resp)
1115 nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p,
1116 struct nfsd3_fhandle_pair *resp)