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);
75 encode_fh(u32 *p, struct svc_fh *fhp)
77 int size = fhp->fh_handle.fh_size;
79 if (size) p[XDR_QUADLEN(size)-1]=0;
80 memcpy(p, &fhp->fh_handle.fh_base, size);
81 return p + XDR_QUADLEN(size);
85 * Decode a file name and make sure that the path contains
86 * no slashes or null bytes.
89 decode_filename(u32 *p, char **namp, int *lenp)
94 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
95 for (i = 0, name = *namp; i < *lenp; i++, name++) {
96 if (*name == '\0' || *name == '/')
105 decode_pathname(u32 *p, char **namp, int *lenp)
110 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXPATHLEN)) != NULL) {
111 for (i = 0, name = *namp; i < *lenp; i++, name++) {
121 decode_sattr3(u32 *p, struct iattr *iap)
128 iap->ia_valid |= ATTR_MODE;
129 iap->ia_mode = ntohl(*p++);
132 iap->ia_valid |= ATTR_UID;
133 iap->ia_uid = ntohl(*p++);
136 iap->ia_valid |= ATTR_GID;
137 iap->ia_gid = ntohl(*p++);
142 iap->ia_valid |= ATTR_SIZE;
143 p = xdr_decode_hyper(p, &newsize);
144 if (newsize <= NFS_OFFSET_MAX)
145 iap->ia_size = newsize;
147 iap->ia_size = NFS_OFFSET_MAX;
149 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
150 iap->ia_valid |= ATTR_ATIME;
151 } else if (tmp == 2) { /* set to client time */
152 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
153 iap->ia_atime.tv_sec = ntohl(*p++);
154 iap->ia_atime.tv_nsec = ntohl(*p++);
156 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
157 iap->ia_valid |= ATTR_MTIME;
158 } else if (tmp == 2) { /* set to client time */
159 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
160 iap->ia_mtime.tv_sec = ntohl(*p++);
161 iap->ia_mtime.tv_nsec = ntohl(*p++);
167 encode_fattr3(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
169 struct vfsmount *mnt = fhp->fh_export->ex_mnt;
170 struct dentry *dentry = fhp->fh_dentry;
172 struct timespec time;
174 vfs_getattr(mnt, dentry, &stat);
176 *p++ = htonl(nfs3_ftypes[(stat.mode & S_IFMT) >> 12]);
177 *p++ = htonl((u32) stat.mode);
178 *p++ = htonl((u32) stat.nlink);
179 *p++ = htonl((u32) nfsd_ruid(rqstp, stat.uid));
180 *p++ = htonl((u32) nfsd_rgid(rqstp, stat.gid));
181 if (S_ISLNK(stat.mode) && stat.size > NFS3_MAXPATHLEN) {
182 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
184 p = xdr_encode_hyper(p, (u64) stat.size);
186 p = xdr_encode_hyper(p, ((u64)stat.blocks) << 9);
187 *p++ = htonl((u32) MAJOR(stat.rdev));
188 *p++ = htonl((u32) MINOR(stat.rdev));
189 if (is_fsid(fhp, rqstp->rq_reffh))
190 p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
192 p = xdr_encode_hyper(p, (u64) huge_encode_dev(stat.dev));
193 p = xdr_encode_hyper(p, (u64) stat.ino);
194 p = encode_time3(p, &stat.atime);
195 lease_get_mtime(dentry->d_inode, &time);
196 p = encode_time3(p, &time);
197 p = encode_time3(p, &stat.ctime);
203 encode_saved_post_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
205 struct inode *inode = fhp->fh_dentry->d_inode;
207 /* Attributes to follow */
210 *p++ = htonl(nfs3_ftypes[(fhp->fh_post_mode & S_IFMT) >> 12]);
211 *p++ = htonl((u32) fhp->fh_post_mode);
212 *p++ = htonl((u32) fhp->fh_post_nlink);
213 *p++ = htonl((u32) nfsd_ruid(rqstp, fhp->fh_post_uid));
214 *p++ = htonl((u32) nfsd_rgid(rqstp, fhp->fh_post_gid));
215 if (S_ISLNK(fhp->fh_post_mode) && fhp->fh_post_size > NFS3_MAXPATHLEN) {
216 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
218 p = xdr_encode_hyper(p, (u64) fhp->fh_post_size);
220 p = xdr_encode_hyper(p, ((u64)fhp->fh_post_blocks) << 9);
221 *p++ = fhp->fh_post_rdev[0];
222 *p++ = fhp->fh_post_rdev[1];
223 if (is_fsid(fhp, rqstp->rq_reffh))
224 p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
226 p = xdr_encode_hyper(p, (u64)huge_encode_dev(inode->i_sb->s_dev));
227 p = xdr_encode_hyper(p, (u64) inode->i_ino);
228 p = encode_time3(p, &fhp->fh_post_atime);
229 p = encode_time3(p, &fhp->fh_post_mtime);
230 p = encode_time3(p, &fhp->fh_post_ctime);
236 * Encode post-operation attributes.
237 * The inode may be NULL if the call failed because of a stale file
238 * handle. In this case, no attributes are returned.
241 encode_post_op_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
243 struct dentry *dentry = fhp->fh_dentry;
244 if (dentry && dentry->d_inode != NULL) {
245 *p++ = xdr_one; /* attributes follow */
246 return encode_fattr3(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 iovec */
346 pn = rqstp->rq_resused;
347 svc_take_page(rqstp);
348 args->vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
349 args->vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE;
354 return xdr_argsize_check(rqstp, p);
358 nfs3svc_decode_writeargs(struct svc_rqst *rqstp, u32 *p,
359 struct nfsd3_writeargs *args)
363 if (!(p = decode_fh(p, &args->fh))
364 || !(p = xdr_decode_hyper(p, &args->offset)))
367 args->count = ntohl(*p++);
368 args->stable = ntohl(*p++);
369 len = args->len = ntohl(*p++);
371 args->vec[0].iov_base = (void*)p;
372 args->vec[0].iov_len = rqstp->rq_arg.head[0].iov_len -
373 (((void*)p) - rqstp->rq_arg.head[0].iov_base);
375 if (len > NFSSVC_MAXBLKSIZE)
376 len = NFSSVC_MAXBLKSIZE;
378 while (len > args->vec[v].iov_len) {
379 len -= args->vec[v].iov_len;
381 args->vec[v].iov_base = page_address(rqstp->rq_argpages[v]);
382 args->vec[v].iov_len = PAGE_SIZE;
384 args->vec[v].iov_len = len;
387 return args->count == args->len && args->vec[0].iov_len > 0;
391 nfs3svc_decode_createargs(struct svc_rqst *rqstp, u32 *p,
392 struct nfsd3_createargs *args)
394 if (!(p = decode_fh(p, &args->fh))
395 || !(p = decode_filename(p, &args->name, &args->len)))
398 switch (args->createmode = ntohl(*p++)) {
399 case NFS3_CREATE_UNCHECKED:
400 case NFS3_CREATE_GUARDED:
401 if (!(p = decode_sattr3(p, &args->attrs)))
404 case NFS3_CREATE_EXCLUSIVE:
412 return xdr_argsize_check(rqstp, p);
415 nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, u32 *p,
416 struct nfsd3_createargs *args)
418 if (!(p = decode_fh(p, &args->fh))
419 || !(p = decode_filename(p, &args->name, &args->len))
420 || !(p = decode_sattr3(p, &args->attrs)))
423 return xdr_argsize_check(rqstp, p);
427 nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, u32 *p,
428 struct nfsd3_symlinkargs *args)
435 if (!(p = decode_fh(p, &args->ffh))
436 || !(p = decode_filename(p, &args->fname, &args->flen))
437 || !(p = decode_sattr3(p, &args->attrs))
440 /* now decode the pathname, which might be larger than the first page.
441 * As we have to check for nul's anyway, we copy it into a new page
442 * This page appears in the rq_res.pages list, but as pages_len is always
443 * 0, it won't get in the way
445 svc_take_page(rqstp);
447 if (len <= 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
449 args->tname = new = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
451 /* first copy and check from the first page */
453 vec = &rqstp->rq_arg.head[0];
454 avail = vec->iov_len - (old - (char*)vec->iov_base);
455 while (len && avail && *old) {
460 /* now copy next page if there is one */
461 if (len && !avail && rqstp->rq_arg.page_len) {
462 avail = rqstp->rq_arg.page_len;
463 if (avail > PAGE_SIZE) avail = PAGE_SIZE;
464 old = page_address(rqstp->rq_arg.pages[0]);
466 while (len && avail && *old) {
479 nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, u32 *p,
480 struct nfsd3_mknodargs *args)
482 if (!(p = decode_fh(p, &args->fh))
483 || !(p = decode_filename(p, &args->name, &args->len)))
486 args->ftype = ntohl(*p++);
488 if (args->ftype == NF3BLK || args->ftype == NF3CHR
489 || args->ftype == NF3SOCK || args->ftype == NF3FIFO) {
490 if (!(p = decode_sattr3(p, &args->attrs)))
494 if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
495 args->major = ntohl(*p++);
496 args->minor = ntohl(*p++);
499 return xdr_argsize_check(rqstp, p);
503 nfs3svc_decode_renameargs(struct svc_rqst *rqstp, u32 *p,
504 struct nfsd3_renameargs *args)
506 if (!(p = decode_fh(p, &args->ffh))
507 || !(p = decode_filename(p, &args->fname, &args->flen))
508 || !(p = decode_fh(p, &args->tfh))
509 || !(p = decode_filename(p, &args->tname, &args->tlen)))
512 return xdr_argsize_check(rqstp, p);
516 nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, u32 *p,
517 struct nfsd3_readlinkargs *args)
519 if (!(p = decode_fh(p, &args->fh)))
521 svc_take_page(rqstp);
522 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
524 return xdr_argsize_check(rqstp, p);
528 nfs3svc_decode_linkargs(struct svc_rqst *rqstp, u32 *p,
529 struct nfsd3_linkargs *args)
531 if (!(p = decode_fh(p, &args->ffh))
532 || !(p = decode_fh(p, &args->tfh))
533 || !(p = decode_filename(p, &args->tname, &args->tlen)))
536 return xdr_argsize_check(rqstp, p);
540 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, u32 *p,
541 struct nfsd3_readdirargs *args)
543 if (!(p = decode_fh(p, &args->fh)))
545 p = xdr_decode_hyper(p, &args->cookie);
546 args->verf = p; p += 2;
548 args->count = ntohl(*p++);
550 if (args->count > PAGE_SIZE)
551 args->count = PAGE_SIZE;
553 svc_take_page(rqstp);
554 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
556 return xdr_argsize_check(rqstp, p);
560 nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, u32 *p,
561 struct nfsd3_readdirargs *args)
565 if (!(p = decode_fh(p, &args->fh)))
567 p = xdr_decode_hyper(p, &args->cookie);
568 args->verf = p; p += 2;
569 args->dircount = ntohl(*p++);
570 args->count = ntohl(*p++);
572 len = (args->count > NFSSVC_MAXBLKSIZE) ? NFSSVC_MAXBLKSIZE :
577 pn = rqstp->rq_resused;
578 svc_take_page(rqstp);
580 args->buffer = page_address(rqstp->rq_respages[pn]);
584 return xdr_argsize_check(rqstp, p);
588 nfs3svc_decode_commitargs(struct svc_rqst *rqstp, u32 *p,
589 struct nfsd3_commitargs *args)
591 if (!(p = decode_fh(p, &args->fh)))
593 p = xdr_decode_hyper(p, &args->offset);
594 args->count = ntohl(*p++);
596 return xdr_argsize_check(rqstp, p);
600 * XDR encode functions
603 * There must be an encoding function for void results so svc_process
604 * will work properly.
607 nfs3svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
609 return xdr_ressize_check(rqstp, p);
614 nfs3svc_encode_attrstat(struct svc_rqst *rqstp, u32 *p,
615 struct nfsd3_attrstat *resp)
617 if (resp->status == 0)
618 p = encode_fattr3(rqstp, p, &resp->fh);
619 return xdr_ressize_check(rqstp, p);
622 /* SETATTR, REMOVE, RMDIR */
624 nfs3svc_encode_wccstat(struct svc_rqst *rqstp, u32 *p,
625 struct nfsd3_attrstat *resp)
627 p = encode_wcc_data(rqstp, p, &resp->fh);
628 return xdr_ressize_check(rqstp, p);
633 nfs3svc_encode_diropres(struct svc_rqst *rqstp, u32 *p,
634 struct nfsd3_diropres *resp)
636 if (resp->status == 0) {
637 p = encode_fh(p, &resp->fh);
638 p = encode_post_op_attr(rqstp, p, &resp->fh);
640 p = encode_post_op_attr(rqstp, p, &resp->dirfh);
641 return xdr_ressize_check(rqstp, p);
646 nfs3svc_encode_accessres(struct svc_rqst *rqstp, u32 *p,
647 struct nfsd3_accessres *resp)
649 p = encode_post_op_attr(rqstp, p, &resp->fh);
650 if (resp->status == 0)
651 *p++ = htonl(resp->access);
652 return xdr_ressize_check(rqstp, p);
657 nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, u32 *p,
658 struct nfsd3_readlinkres *resp)
660 p = encode_post_op_attr(rqstp, p, &resp->fh);
661 if (resp->status == 0) {
662 *p++ = htonl(resp->len);
663 xdr_ressize_check(rqstp, p);
664 rqstp->rq_res.page_len = resp->len;
666 /* need to pad the tail */
667 rqstp->rq_restailpage = 0;
668 rqstp->rq_res.tail[0].iov_base = p;
670 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
674 return xdr_ressize_check(rqstp, p);
679 nfs3svc_encode_readres(struct svc_rqst *rqstp, u32 *p,
680 struct nfsd3_readres *resp)
682 p = encode_post_op_attr(rqstp, p, &resp->fh);
683 if (resp->status == 0) {
684 *p++ = htonl(resp->count);
685 *p++ = htonl(resp->eof);
686 *p++ = htonl(resp->count); /* xdr opaque count */
687 xdr_ressize_check(rqstp, p);
688 /* now update rqstp->rq_res to reflect data aswell */
689 rqstp->rq_res.page_len = resp->count;
690 if (resp->count & 3) {
691 /* need to pad the tail */
692 rqstp->rq_restailpage = 0;
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);
763 *p++ = 0; /* no more entries */
764 *p++ = htonl(resp->common.err == nfserr_eof);
765 rqstp->rq_res.page_len = (resp->count + 2) << 2;
768 return xdr_ressize_check(rqstp, p);
772 encode_entry_baggage(struct nfsd3_readdirres *cd, u32 *p, const char *name,
773 int namlen, ino_t ino)
775 *p++ = xdr_one; /* mark entry present */
776 p = xdr_encode_hyper(p, ino); /* file id */
777 p = xdr_encode_array(p, name, namlen);/* name length & name */
779 cd->offset = p; /* remember pointer */
780 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
786 encode_entryplus_baggage(struct nfsd3_readdirres *cd, u32 *p,
789 p = encode_post_op_attr(cd->rqstp, p, fhp);
790 *p++ = xdr_one; /* yes, a file handle follows */
791 p = encode_fh(p, fhp);
797 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
798 const char *name, int namlen)
800 struct svc_export *exp;
801 struct dentry *dparent, *dchild;
803 dparent = cd->fh.fh_dentry;
804 exp = cd->fh.fh_export;
806 fh_init(fhp, NFS3_FHSIZE);
807 if (isdotent(name, namlen)) {
809 dchild = dget_parent(dparent);
811 dchild = dget(dparent);
813 dchild = lookup_one_len(name, dparent, namlen);
816 if (d_mountpoint(dchild))
818 if (fh_compose(fhp, exp, dchild, &cd->fh) != 0 || !dchild->d_inode)
824 * Encode a directory entry. This one works for both normal readdir
826 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
827 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
829 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
833 #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
834 #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
836 encode_entry(struct readdir_cd *ccd, const char *name,
837 int namlen, off_t offset, ino_t ino, unsigned int d_type, int plus)
839 struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
842 caddr_t curr_page_addr = NULL;
843 int pn; /* current page number */
844 int slen; /* string (name) length */
845 int elen; /* estimated entry length in words */
846 int num_entry_words = 0; /* actual number of words */
849 xdr_encode_hyper(cd->offset, (u64) offset);
852 dprintk("encode_entry(%.*s @%ld%s)\n",
853 namlen, name, (long) offset, plus? " plus" : "");
856 /* truncate filename if too long */
857 if (namlen > NFS3_MAXNAMLEN)
858 namlen = NFS3_MAXNAMLEN;
860 slen = XDR_QUADLEN(namlen);
861 elen = slen + NFS3_ENTRY_BAGGAGE
862 + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
864 if (cd->buflen < elen) {
865 cd->common.err = nfserr_toosmall;
869 /* determine which page in rq_respages[] we are currently filling */
870 for (pn=1; pn < cd->rqstp->rq_resused; pn++) {
871 curr_page_addr = page_address(cd->rqstp->rq_respages[pn]);
873 if (((caddr_t)cd->buffer >= curr_page_addr) &&
874 ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
878 if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
879 /* encode entry in current page */
881 p = encode_entry_baggage(cd, p, name, namlen, ino);
883 /* throw in readdirplus baggage */
887 if (compose_entry_fh(cd, &fh, name, namlen) > 0) {
891 p = encode_entryplus_baggage(cd, p, &fh);
893 num_entry_words = p - cd->buffer;
894 } else if (cd->rqstp->rq_respages[pn+1] != NULL) {
895 /* temporarily encode entry into next page, then move back to
896 * current and next page in rq_respages[] */
900 /* grab next page for temporary storage of entry */
901 p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]);
903 p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
905 /* throw in readdirplus baggage */
909 if (compose_entry_fh(cd, &fh, name, namlen) > 0) {
910 /* zero out the filehandle */
914 p1 = encode_entryplus_baggage(cd, p1, &fh);
917 /* determine entry word length and lengths to go in pages */
918 num_entry_words = p1 - tmp;
919 len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
920 if ((num_entry_words << 2) < len1) {
921 /* the actual number of words in the entry is less
922 * than elen and can still fit in the current page
924 memmove(p, tmp, num_entry_words << 2);
925 p += num_entry_words;
928 cd->offset = cd->buffer + (cd->offset - tmp);
930 len2 = (num_entry_words << 2) - len1;
932 /* move from temp page to current and next pages */
933 memmove(p, tmp, len1);
934 memmove(tmp, (caddr_t)tmp+len1, len2);
937 if (((cd->offset - tmp) << 2) <= len1)
938 cd->offset = p + (cd->offset - tmp);
940 cd->offset -= len1 >> 2;
941 p = tmp + (len2 >> 2);
945 cd->common.err = nfserr_toosmall;
949 cd->buflen -= num_entry_words;
951 cd->common.err = nfs_ok;
957 nfs3svc_encode_entry(struct readdir_cd *cd, const char *name,
958 int namlen, loff_t offset, ino_t ino, unsigned int d_type)
960 return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
964 nfs3svc_encode_entry_plus(struct readdir_cd *cd, const char *name,
965 int namlen, loff_t offset, ino_t ino, unsigned int d_type)
967 return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
972 nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, u32 *p,
973 struct nfsd3_fsstatres *resp)
975 struct kstatfs *s = &resp->stats;
978 *p++ = xdr_zero; /* no post_op_attr */
980 if (resp->status == 0) {
981 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
982 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
983 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
984 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
985 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
986 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
987 *p++ = htonl(resp->invarsec); /* mean unchanged time */
989 return xdr_ressize_check(rqstp, p);
994 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, u32 *p,
995 struct nfsd3_fsinfores *resp)
997 *p++ = xdr_zero; /* no post_op_attr */
999 if (resp->status == 0) {
1000 *p++ = htonl(resp->f_rtmax);
1001 *p++ = htonl(resp->f_rtpref);
1002 *p++ = htonl(resp->f_rtmult);
1003 *p++ = htonl(resp->f_wtmax);
1004 *p++ = htonl(resp->f_wtpref);
1005 *p++ = htonl(resp->f_wtmult);
1006 *p++ = htonl(resp->f_dtpref);
1007 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1010 *p++ = htonl(resp->f_properties);
1013 return xdr_ressize_check(rqstp, p);
1018 nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, u32 *p,
1019 struct nfsd3_pathconfres *resp)
1021 *p++ = xdr_zero; /* no post_op_attr */
1023 if (resp->status == 0) {
1024 *p++ = htonl(resp->p_link_max);
1025 *p++ = htonl(resp->p_name_max);
1026 *p++ = htonl(resp->p_no_trunc);
1027 *p++ = htonl(resp->p_chown_restricted);
1028 *p++ = htonl(resp->p_case_insensitive);
1029 *p++ = htonl(resp->p_case_preserving);
1032 return xdr_ressize_check(rqstp, p);
1037 nfs3svc_encode_commitres(struct svc_rqst *rqstp, u32 *p,
1038 struct nfsd3_commitres *resp)
1040 p = encode_wcc_data(rqstp, p, &resp->fh);
1041 /* Write verifier */
1042 if (resp->status == 0) {
1043 *p++ = htonl(nfssvc_boot.tv_sec);
1044 *p++ = htonl(nfssvc_boot.tv_usec);
1046 return xdr_ressize_check(rqstp, p);
1050 * XDR release functions
1053 nfs3svc_release_fhandle(struct svc_rqst *rqstp, u32 *p,
1054 struct nfsd3_attrstat *resp)
1061 nfs3svc_release_fhandle2(struct svc_rqst *rqstp, u32 *p,
1062 struct nfsd3_fhandle_pair *resp)