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 if (newsize <= NFS_OFFSET_MAX)
124 iap->ia_size = newsize;
126 iap->ia_size = NFS_OFFSET_MAX;
128 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
129 iap->ia_valid |= ATTR_ATIME;
130 } else if (tmp == 2) { /* set to client time */
131 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
132 iap->ia_atime.tv_sec = ntohl(*p++);
133 iap->ia_atime.tv_nsec = ntohl(*p++);
135 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
136 iap->ia_valid |= ATTR_MTIME;
137 } else if (tmp == 2) { /* set to client time */
138 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
139 iap->ia_mtime.tv_sec = ntohl(*p++);
140 iap->ia_mtime.tv_nsec = ntohl(*p++);
145 static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
148 switch(fsid_source(fhp)) {
151 p = xdr_encode_hyper(p, (u64)huge_encode_dev
152 (fhp->fh_dentry->d_inode->i_sb->s_dev));
154 case FSIDSOURCE_FSID:
155 p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
157 case FSIDSOURCE_UUID:
158 f = ((u64*)fhp->fh_export->ex_uuid)[0];
159 f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
160 p = xdr_encode_hyper(p, f);
167 encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
170 *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
171 *p++ = htonl((u32) stat->mode);
172 *p++ = htonl((u32) stat->nlink);
173 *p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
174 *p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
175 if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
176 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
178 p = xdr_encode_hyper(p, (u64) stat->size);
180 p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
181 *p++ = htonl((u32) MAJOR(stat->rdev));
182 *p++ = htonl((u32) MINOR(stat->rdev));
183 p = encode_fsid(p, fhp);
184 p = xdr_encode_hyper(p, stat->ino);
185 p = encode_time3(p, &stat->atime);
186 p = encode_time3(p, &stat->mtime);
187 p = encode_time3(p, &stat->ctime);
193 encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
195 /* Attributes to follow */
197 return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
201 * Encode post-operation attributes.
202 * The inode may be NULL if the call failed because of a stale file
203 * handle. In this case, no attributes are returned.
206 encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
208 struct dentry *dentry = fhp->fh_dentry;
209 if (dentry && dentry->d_inode) {
213 err = fh_getattr(fhp, &stat);
215 *p++ = xdr_one; /* attributes follow */
216 lease_get_mtime(dentry->d_inode, &stat.mtime);
217 return encode_fattr3(rqstp, p, fhp, &stat);
224 /* Helper for NFSv3 ACLs */
226 nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
228 return encode_post_op_attr(rqstp, p, fhp);
232 * Enocde weak cache consistency data
235 encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
237 struct dentry *dentry = fhp->fh_dentry;
239 if (dentry && dentry->d_inode && fhp->fh_post_saved) {
240 if (fhp->fh_pre_saved) {
242 p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
243 p = encode_time3(p, &fhp->fh_pre_mtime);
244 p = encode_time3(p, &fhp->fh_pre_ctime);
248 return encode_saved_post_attr(rqstp, p, fhp);
250 /* no pre- or post-attrs */
252 return encode_post_op_attr(rqstp, p, fhp);
256 * Fill in the post_op attr for the wcc data
258 void fill_post_wcc(struct svc_fh *fhp)
262 if (fhp->fh_post_saved)
263 printk("nfsd: inode locked twice during operation.\n");
265 err = fh_getattr(fhp, &fhp->fh_post_attr);
266 fhp->fh_post_change = fhp->fh_dentry->d_inode->i_version;
268 fhp->fh_post_saved = 0;
269 /* Grab the ctime anyway - set_change_info might use it */
270 fhp->fh_post_attr.ctime = fhp->fh_dentry->d_inode->i_ctime;
272 fhp->fh_post_saved = 1;
276 * XDR decode functions
279 nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
281 if (!(p = decode_fh(p, &args->fh)))
283 return xdr_argsize_check(rqstp, p);
287 nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
288 struct nfsd3_sattrargs *args)
290 if (!(p = decode_fh(p, &args->fh)))
292 p = decode_sattr3(p, &args->attrs);
294 if ((args->check_guard = ntohl(*p++)) != 0) {
295 struct timespec time;
296 p = decode_time3(p, &time);
297 args->guardtime = time.tv_sec;
300 return xdr_argsize_check(rqstp, p);
304 nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
305 struct nfsd3_diropargs *args)
307 if (!(p = decode_fh(p, &args->fh))
308 || !(p = decode_filename(p, &args->name, &args->len)))
311 return xdr_argsize_check(rqstp, p);
315 nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
316 struct nfsd3_accessargs *args)
318 if (!(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 if (!(p = decode_fh(p, &args->fh)))
335 p = xdr_decode_hyper(p, &args->offset);
337 len = args->count = ntohl(*p++);
339 if (len > max_blocksize)
342 /* set up the kvec */
345 struct page *p = *(rqstp->rq_next_page++);
347 rqstp->rq_vec[v].iov_base = page_address(p);
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, __be32 *p,
358 struct nfsd3_writeargs *args)
360 unsigned int len, v, hdr, dlen;
361 u32 max_blocksize = svc_max_payload(rqstp);
363 if (!(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
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 = rqstp->rq_arg.page_len;
483 if (avail > PAGE_SIZE)
485 old = page_address(rqstp->rq_arg.pages[0]);
487 while (len && avail && *old) {
500 nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p,
501 struct nfsd3_mknodargs *args)
503 if (!(p = decode_fh(p, &args->fh))
504 || !(p = decode_filename(p, &args->name, &args->len)))
507 args->ftype = ntohl(*p++);
509 if (args->ftype == NF3BLK || args->ftype == NF3CHR
510 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
511 p = decode_sattr3(p, &args->attrs);
513 if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
514 args->major = ntohl(*p++);
515 args->minor = ntohl(*p++);
518 return xdr_argsize_check(rqstp, p);
522 nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
523 struct nfsd3_renameargs *args)
525 if (!(p = decode_fh(p, &args->ffh))
526 || !(p = decode_filename(p, &args->fname, &args->flen))
527 || !(p = decode_fh(p, &args->tfh))
528 || !(p = decode_filename(p, &args->tname, &args->tlen)))
531 return xdr_argsize_check(rqstp, p);
535 nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
536 struct nfsd3_readlinkargs *args)
538 if (!(p = decode_fh(p, &args->fh)))
540 args->buffer = page_address(*(rqstp->rq_next_page++));
542 return xdr_argsize_check(rqstp, p);
546 nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
547 struct nfsd3_linkargs *args)
549 if (!(p = decode_fh(p, &args->ffh))
550 || !(p = decode_fh(p, &args->tfh))
551 || !(p = decode_filename(p, &args->tname, &args->tlen)))
554 return xdr_argsize_check(rqstp, p);
558 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
559 struct nfsd3_readdirargs *args)
561 if (!(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++);
568 if (args->count > PAGE_SIZE)
569 args->count = PAGE_SIZE;
571 args->buffer = page_address(*(rqstp->rq_next_page++));
573 return xdr_argsize_check(rqstp, p);
577 nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
578 struct nfsd3_readdirargs *args)
581 u32 max_blocksize = svc_max_payload(rqstp);
583 if (!(p = decode_fh(p, &args->fh)))
585 p = xdr_decode_hyper(p, &args->cookie);
586 args->verf = p; p += 2;
587 args->dircount = ntohl(*p++);
588 args->count = ntohl(*p++);
590 len = (args->count > max_blocksize) ? 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 if (!(p = decode_fh(p, &args->fh)))
610 p = xdr_decode_hyper(p, &args->offset);
611 args->count = ntohl(*p++);
613 return xdr_argsize_check(rqstp, p);
617 * XDR encode functions
620 * There must be an encoding function for void results so svc_process
621 * will work properly.
624 nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
626 return xdr_ressize_check(rqstp, p);
631 nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
632 struct nfsd3_attrstat *resp)
634 if (resp->status == 0) {
635 lease_get_mtime(resp->fh.fh_dentry->d_inode,
637 p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
639 return xdr_ressize_check(rqstp, p);
642 /* SETATTR, REMOVE, RMDIR */
644 nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p,
645 struct nfsd3_attrstat *resp)
647 p = encode_wcc_data(rqstp, p, &resp->fh);
648 return xdr_ressize_check(rqstp, p);
653 nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
654 struct nfsd3_diropres *resp)
656 if (resp->status == 0) {
657 p = encode_fh(p, &resp->fh);
658 p = encode_post_op_attr(rqstp, p, &resp->fh);
660 p = encode_post_op_attr(rqstp, p, &resp->dirfh);
661 return xdr_ressize_check(rqstp, p);
666 nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
667 struct nfsd3_accessres *resp)
669 p = encode_post_op_attr(rqstp, p, &resp->fh);
670 if (resp->status == 0)
671 *p++ = htonl(resp->access);
672 return xdr_ressize_check(rqstp, p);
677 nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
678 struct nfsd3_readlinkres *resp)
680 p = encode_post_op_attr(rqstp, p, &resp->fh);
681 if (resp->status == 0) {
682 *p++ = htonl(resp->len);
683 xdr_ressize_check(rqstp, p);
684 rqstp->rq_res.page_len = resp->len;
686 /* need to pad the tail */
687 rqstp->rq_res.tail[0].iov_base = p;
689 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
693 return xdr_ressize_check(rqstp, p);
698 nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
699 struct nfsd3_readres *resp)
701 p = encode_post_op_attr(rqstp, p, &resp->fh);
702 if (resp->status == 0) {
703 *p++ = htonl(resp->count);
704 *p++ = htonl(resp->eof);
705 *p++ = htonl(resp->count); /* xdr opaque count */
706 xdr_ressize_check(rqstp, p);
707 /* now update rqstp->rq_res to reflect data as well */
708 rqstp->rq_res.page_len = resp->count;
709 if (resp->count & 3) {
710 /* need to pad the tail */
711 rqstp->rq_res.tail[0].iov_base = p;
713 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
717 return xdr_ressize_check(rqstp, p);
722 nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p,
723 struct nfsd3_writeres *resp)
725 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
727 p = encode_wcc_data(rqstp, p, &resp->fh);
728 if (resp->status == 0) {
729 *p++ = htonl(resp->count);
730 *p++ = htonl(resp->committed);
731 *p++ = htonl(nn->nfssvc_boot.tv_sec);
732 *p++ = htonl(nn->nfssvc_boot.tv_usec);
734 return xdr_ressize_check(rqstp, p);
737 /* CREATE, MKDIR, SYMLINK, MKNOD */
739 nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p,
740 struct nfsd3_diropres *resp)
742 if (resp->status == 0) {
744 p = encode_fh(p, &resp->fh);
745 p = encode_post_op_attr(rqstp, p, &resp->fh);
747 p = encode_wcc_data(rqstp, p, &resp->dirfh);
748 return xdr_ressize_check(rqstp, p);
753 nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p,
754 struct nfsd3_renameres *resp)
756 p = encode_wcc_data(rqstp, p, &resp->ffh);
757 p = encode_wcc_data(rqstp, p, &resp->tfh);
758 return xdr_ressize_check(rqstp, p);
763 nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p,
764 struct nfsd3_linkres *resp)
766 p = encode_post_op_attr(rqstp, p, &resp->fh);
767 p = encode_wcc_data(rqstp, p, &resp->tfh);
768 return xdr_ressize_check(rqstp, p);
773 nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
774 struct nfsd3_readdirres *resp)
776 p = encode_post_op_attr(rqstp, p, &resp->fh);
778 if (resp->status == 0) {
779 /* stupid readdir cookie */
780 memcpy(p, resp->verf, 8); p += 2;
781 xdr_ressize_check(rqstp, p);
782 if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
783 return 1; /*No room for trailer */
784 rqstp->rq_res.page_len = (resp->count) << 2;
786 /* add the 'tail' to the end of the 'head' page - page 0. */
787 rqstp->rq_res.tail[0].iov_base = p;
788 *p++ = 0; /* no more entries */
789 *p++ = htonl(resp->common.err == nfserr_eof);
790 rqstp->rq_res.tail[0].iov_len = 2<<2;
793 return xdr_ressize_check(rqstp, p);
797 encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
800 *p++ = xdr_one; /* mark entry present */
801 p = xdr_encode_hyper(p, ino); /* file id */
802 p = xdr_encode_array(p, name, namlen);/* name length & name */
804 cd->offset = p; /* remember pointer */
805 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
811 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
812 const char *name, int namlen)
814 struct svc_export *exp;
815 struct dentry *dparent, *dchild;
816 __be32 rv = nfserr_noent;
818 dparent = cd->fh.fh_dentry;
819 exp = cd->fh.fh_export;
821 if (isdotent(name, namlen)) {
823 dchild = dget_parent(dparent);
824 /* filesystem root - cannot return filehandle for ".." */
825 if (dchild == dparent)
828 dchild = dget(dparent);
830 dchild = lookup_one_len(name, dparent, namlen);
833 if (d_mountpoint(dchild))
835 if (!dchild->d_inode)
837 rv = fh_compose(fhp, exp, dchild, &cd->fh);
843 static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen)
848 fh_init(&fh, NFS3_FHSIZE);
849 err = compose_entry_fh(cd, &fh, name, namlen);
855 p = encode_post_op_attr(cd->rqstp, p, &fh);
856 *p++ = xdr_one; /* yes, a file handle follows */
857 p = encode_fh(p, &fh);
864 * Encode a directory entry. This one works for both normal readdir
866 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
867 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
869 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
873 #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
874 #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
876 encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
877 loff_t offset, u64 ino, unsigned int d_type, int plus)
879 struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
881 __be32 *p = cd->buffer;
882 caddr_t curr_page_addr = NULL;
884 int slen; /* string (name) length */
885 int elen; /* estimated entry length in words */
886 int num_entry_words = 0; /* actual number of words */
889 u64 offset64 = offset;
891 if (unlikely(cd->offset1)) {
892 /* we ended up with offset on a page boundary */
893 *cd->offset = htonl(offset64 >> 32);
894 *cd->offset1 = htonl(offset64 & 0xffffffff);
897 xdr_encode_hyper(cd->offset, offset64);
902 dprintk("encode_entry(%.*s @%ld%s)\n",
903 namlen, name, (long) offset, plus? " plus" : "");
906 /* truncate filename if too long */
907 if (namlen > NFS3_MAXNAMLEN)
908 namlen = NFS3_MAXNAMLEN;
910 slen = XDR_QUADLEN(namlen);
911 elen = slen + NFS3_ENTRY_BAGGAGE
912 + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
914 if (cd->buflen < elen) {
915 cd->common.err = nfserr_toosmall;
919 /* determine which page in rq_respages[] we are currently filling */
920 for (page = cd->rqstp->rq_respages + 1;
921 page < cd->rqstp->rq_next_page; page++) {
922 curr_page_addr = page_address(*page);
924 if (((caddr_t)cd->buffer >= curr_page_addr) &&
925 ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
929 if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
930 /* encode entry in current page */
932 p = encode_entry_baggage(cd, p, name, namlen, ino);
935 p = encode_entryplus_baggage(cd, p, name, namlen);
936 num_entry_words = p - cd->buffer;
937 } else if (*(page+1) != NULL) {
938 /* temporarily encode entry into next page, then move back to
939 * current and next page in rq_respages[] */
943 /* grab next page for temporary storage of entry */
944 p1 = tmp = page_address(*(page+1));
946 p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
949 p1 = encode_entryplus_baggage(cd, p1, name, namlen);
951 /* determine entry word length and lengths to go in pages */
952 num_entry_words = p1 - tmp;
953 len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
954 if ((num_entry_words << 2) < len1) {
955 /* the actual number of words in the entry is less
956 * than elen and can still fit in the current page
958 memmove(p, tmp, num_entry_words << 2);
959 p += num_entry_words;
962 cd->offset = cd->buffer + (cd->offset - tmp);
964 unsigned int offset_r = (cd->offset - tmp) << 2;
966 /* update pointer to offset location.
967 * This is a 64bit quantity, so we need to
969 * - entirely in first page
970 * - entirely in second page
971 * - 4 bytes in each page
973 if (offset_r + 8 <= len1) {
974 cd->offset = p + (cd->offset - tmp);
975 } else if (offset_r >= len1) {
976 cd->offset -= len1 >> 2;
978 /* sitting on the fence */
979 BUG_ON(offset_r != len1 - 4);
980 cd->offset = p + (cd->offset - tmp);
984 len2 = (num_entry_words << 2) - len1;
986 /* move from temp page to current and next pages */
987 memmove(p, tmp, len1);
988 memmove(tmp, (caddr_t)tmp+len1, len2);
990 p = tmp + (len2 >> 2);
994 cd->common.err = nfserr_toosmall;
998 cd->buflen -= num_entry_words;
1000 cd->common.err = nfs_ok;
1006 nfs3svc_encode_entry(void *cd, const char *name,
1007 int namlen, loff_t offset, u64 ino, unsigned int d_type)
1009 return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
1013 nfs3svc_encode_entry_plus(void *cd, const char *name,
1014 int namlen, loff_t offset, u64 ino,
1015 unsigned int d_type)
1017 return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
1022 nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p,
1023 struct nfsd3_fsstatres *resp)
1025 struct kstatfs *s = &resp->stats;
1026 u64 bs = s->f_bsize;
1028 *p++ = xdr_zero; /* no post_op_attr */
1030 if (resp->status == 0) {
1031 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
1032 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
1033 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
1034 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
1035 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
1036 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
1037 *p++ = htonl(resp->invarsec); /* mean unchanged time */
1039 return xdr_ressize_check(rqstp, p);
1044 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p,
1045 struct nfsd3_fsinfores *resp)
1047 *p++ = xdr_zero; /* no post_op_attr */
1049 if (resp->status == 0) {
1050 *p++ = htonl(resp->f_rtmax);
1051 *p++ = htonl(resp->f_rtpref);
1052 *p++ = htonl(resp->f_rtmult);
1053 *p++ = htonl(resp->f_wtmax);
1054 *p++ = htonl(resp->f_wtpref);
1055 *p++ = htonl(resp->f_wtmult);
1056 *p++ = htonl(resp->f_dtpref);
1057 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1060 *p++ = htonl(resp->f_properties);
1063 return xdr_ressize_check(rqstp, p);
1068 nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p,
1069 struct nfsd3_pathconfres *resp)
1071 *p++ = xdr_zero; /* no post_op_attr */
1073 if (resp->status == 0) {
1074 *p++ = htonl(resp->p_link_max);
1075 *p++ = htonl(resp->p_name_max);
1076 *p++ = htonl(resp->p_no_trunc);
1077 *p++ = htonl(resp->p_chown_restricted);
1078 *p++ = htonl(resp->p_case_insensitive);
1079 *p++ = htonl(resp->p_case_preserving);
1082 return xdr_ressize_check(rqstp, p);
1087 nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p,
1088 struct nfsd3_commitres *resp)
1090 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1092 p = encode_wcc_data(rqstp, p, &resp->fh);
1093 /* Write verifier */
1094 if (resp->status == 0) {
1095 *p++ = htonl(nn->nfssvc_boot.tv_sec);
1096 *p++ = htonl(nn->nfssvc_boot.tv_usec);
1098 return xdr_ressize_check(rqstp, p);
1102 * XDR release functions
1105 nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
1106 struct nfsd3_attrstat *resp)
1113 nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p,
1114 struct nfsd3_fhandle_pair *resp)