1 // SPDX-License-Identifier: GPL-2.0
3 * XDR support for nfsd/protocol version 3.
7 * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
10 #include <linux/namei.h>
11 #include <linux/sunrpc/svc_xprt.h>
18 * Force construction of an empty post-op attr
20 static const struct svc_fh nfs3svc_null_fh = {
25 * time_delta. {1, 0} means the server is accurate only
26 * to the nearest second.
28 static const struct timespec64 nfs3svc_time_delta = {
34 * Mapping of S_IF* types to NFS file types
36 static const u32 nfs3_ftypes[] = {
37 NF3NON, NF3FIFO, NF3CHR, NF3BAD,
38 NF3DIR, NF3BAD, NF3BLK, NF3BAD,
39 NF3REG, NF3BAD, NF3LNK, NF3BAD,
40 NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
45 * Basic NFSv3 data types (RFC 1813 Sections 2.5 and 2.6)
49 encode_nfstime3(__be32 *p, const struct timespec64 *time)
51 *p++ = cpu_to_be32((u32)time->tv_sec);
52 *p++ = cpu_to_be32(time->tv_nsec);
58 svcxdr_decode_nfstime3(struct xdr_stream *xdr, struct timespec64 *timep)
62 p = xdr_inline_decode(xdr, XDR_UNIT * 2);
65 timep->tv_sec = be32_to_cpup(p++);
66 timep->tv_nsec = be32_to_cpup(p);
72 * svcxdr_decode_nfs_fh3 - Decode an NFSv3 file handle
73 * @xdr: XDR stream positioned at an undecoded NFSv3 FH
74 * @fhp: OUT: filled-in server file handle
77 * %false: The encoded file handle was not valid
78 * %true: @fhp has been initialized
81 svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp)
86 if (xdr_stream_decode_u32(xdr, &size) < 0)
88 if (size == 0 || size > NFS3_FHSIZE)
90 p = xdr_inline_decode(xdr, size);
93 fh_init(fhp, NFS3_FHSIZE);
94 fhp->fh_handle.fh_size = size;
95 memcpy(&fhp->fh_handle.fh_raw, p, size);
101 * svcxdr_encode_nfsstat3 - Encode an NFSv3 status code
103 * @status: status value to encode
106 * %false: Send buffer space was exhausted
110 svcxdr_encode_nfsstat3(struct xdr_stream *xdr, __be32 status)
114 p = xdr_reserve_space(xdr, sizeof(status));
123 svcxdr_encode_nfs_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
125 u32 size = fhp->fh_handle.fh_size;
128 p = xdr_reserve_space(xdr, XDR_UNIT + size);
131 *p++ = cpu_to_be32(size);
133 p[XDR_QUADLEN(size) - 1] = 0;
134 memcpy(p, &fhp->fh_handle.fh_raw, size);
140 svcxdr_encode_post_op_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
142 if (xdr_stream_encode_item_present(xdr) < 0)
144 if (!svcxdr_encode_nfs_fh3(xdr, fhp))
151 svcxdr_encode_cookieverf3(struct xdr_stream *xdr, const __be32 *verf)
155 p = xdr_reserve_space(xdr, NFS3_COOKIEVERFSIZE);
158 memcpy(p, verf, NFS3_COOKIEVERFSIZE);
164 svcxdr_encode_writeverf3(struct xdr_stream *xdr, const __be32 *verf)
168 p = xdr_reserve_space(xdr, NFS3_WRITEVERFSIZE);
171 memcpy(p, verf, NFS3_WRITEVERFSIZE);
177 svcxdr_decode_filename3(struct xdr_stream *xdr, char **name, unsigned int *len)
183 if (xdr_stream_decode_u32(xdr, &size) < 0)
185 if (size == 0 || size > NFS3_MAXNAMLEN)
187 p = xdr_inline_decode(xdr, size);
193 for (i = 0, c = *name; i < size; i++, c++) {
194 if (*c == '\0' || *c == '/')
202 svcxdr_decode_diropargs3(struct xdr_stream *xdr, struct svc_fh *fhp,
203 char **name, unsigned int *len)
205 return svcxdr_decode_nfs_fh3(xdr, fhp) &&
206 svcxdr_decode_filename3(xdr, name, len);
210 svcxdr_decode_sattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
217 if (xdr_stream_decode_bool(xdr, &set_it) < 0)
222 if (xdr_stream_decode_u32(xdr, &mode) < 0)
224 iap->ia_valid |= ATTR_MODE;
227 if (xdr_stream_decode_bool(xdr, &set_it) < 0)
232 if (xdr_stream_decode_u32(xdr, &uid) < 0)
234 iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), uid);
235 if (uid_valid(iap->ia_uid))
236 iap->ia_valid |= ATTR_UID;
238 if (xdr_stream_decode_bool(xdr, &set_it) < 0)
243 if (xdr_stream_decode_u32(xdr, &gid) < 0)
245 iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), gid);
246 if (gid_valid(iap->ia_gid))
247 iap->ia_valid |= ATTR_GID;
249 if (xdr_stream_decode_bool(xdr, &set_it) < 0)
254 if (xdr_stream_decode_u64(xdr, &newsize) < 0)
256 iap->ia_valid |= ATTR_SIZE;
257 iap->ia_size = newsize;
259 if (xdr_stream_decode_u32(xdr, &set_it) < 0)
264 case SET_TO_SERVER_TIME:
265 iap->ia_valid |= ATTR_ATIME;
267 case SET_TO_CLIENT_TIME:
268 if (!svcxdr_decode_nfstime3(xdr, &iap->ia_atime))
270 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
275 if (xdr_stream_decode_u32(xdr, &set_it) < 0)
280 case SET_TO_SERVER_TIME:
281 iap->ia_valid |= ATTR_MTIME;
283 case SET_TO_CLIENT_TIME:
284 if (!svcxdr_decode_nfstime3(xdr, &iap->ia_mtime))
286 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
296 svcxdr_decode_sattrguard3(struct xdr_stream *xdr, struct nfsd3_sattrargs *args)
301 if (xdr_stream_decode_bool(xdr, &check) < 0)
304 p = xdr_inline_decode(xdr, XDR_UNIT * 2);
307 args->check_guard = 1;
308 args->guardtime = be32_to_cpup(p);
310 args->check_guard = 0;
316 svcxdr_decode_specdata3(struct xdr_stream *xdr, struct nfsd3_mknodargs *args)
320 p = xdr_inline_decode(xdr, XDR_UNIT * 2);
323 args->major = be32_to_cpup(p++);
324 args->minor = be32_to_cpup(p);
330 svcxdr_decode_devicedata3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
331 struct nfsd3_mknodargs *args)
333 return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
334 svcxdr_decode_specdata3(xdr, args);
338 svcxdr_encode_fattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
339 const struct svc_fh *fhp, const struct kstat *stat)
341 struct user_namespace *userns = nfsd_user_namespace(rqstp);
345 p = xdr_reserve_space(xdr, XDR_UNIT * 21);
349 *p++ = cpu_to_be32(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
350 *p++ = cpu_to_be32((u32)(stat->mode & S_IALLUGO));
351 *p++ = cpu_to_be32((u32)stat->nlink);
352 *p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid));
353 *p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid));
354 if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN)
355 p = xdr_encode_hyper(p, (u64)NFS3_MAXPATHLEN);
357 p = xdr_encode_hyper(p, (u64)stat->size);
360 p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
363 *p++ = cpu_to_be32((u32)MAJOR(stat->rdev));
364 *p++ = cpu_to_be32((u32)MINOR(stat->rdev));
366 switch(fsid_source(fhp)) {
367 case FSIDSOURCE_FSID:
368 fsid = (u64)fhp->fh_export->ex_fsid;
370 case FSIDSOURCE_UUID:
371 fsid = ((u64 *)fhp->fh_export->ex_uuid)[0];
372 fsid ^= ((u64 *)fhp->fh_export->ex_uuid)[1];
375 fsid = (u64)huge_encode_dev(fhp->fh_dentry->d_sb->s_dev);
377 p = xdr_encode_hyper(p, fsid);
380 p = xdr_encode_hyper(p, stat->ino);
382 p = encode_nfstime3(p, &stat->atime);
383 p = encode_nfstime3(p, &stat->mtime);
384 encode_nfstime3(p, &stat->ctime);
390 svcxdr_encode_wcc_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
394 p = xdr_reserve_space(xdr, XDR_UNIT * 6);
397 p = xdr_encode_hyper(p, (u64)fhp->fh_pre_size);
398 p = encode_nfstime3(p, &fhp->fh_pre_mtime);
399 encode_nfstime3(p, &fhp->fh_pre_ctime);
405 svcxdr_encode_pre_op_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
407 if (!fhp->fh_pre_saved) {
408 if (xdr_stream_encode_item_absent(xdr) < 0)
413 if (xdr_stream_encode_item_present(xdr) < 0)
415 return svcxdr_encode_wcc_attr(xdr, fhp);
419 * svcxdr_encode_post_op_attr - Encode NFSv3 post-op attributes
420 * @rqstp: Context of a completed RPC transaction
422 * @fhp: File handle to encode
425 * %false: Send buffer space was exhausted
429 svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
430 const struct svc_fh *fhp)
432 struct dentry *dentry = fhp->fh_dentry;
436 * The inode may be NULL if the call failed because of a
437 * stale file handle. In this case, no attributes are
440 if (fhp->fh_no_wcc || !dentry || !d_really_is_positive(dentry))
441 goto no_post_op_attrs;
442 if (fh_getattr(fhp, &stat) != nfs_ok)
443 goto no_post_op_attrs;
445 if (xdr_stream_encode_item_present(xdr) < 0)
447 lease_get_mtime(d_inode(dentry), &stat.mtime);
448 if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &stat))
454 return xdr_stream_encode_item_absent(xdr) > 0;
458 * Encode weak cache consistency data
461 svcxdr_encode_wcc_data(struct svc_rqst *rqstp, struct xdr_stream *xdr,
462 const struct svc_fh *fhp)
464 struct dentry *dentry = fhp->fh_dentry;
466 if (!dentry || !d_really_is_positive(dentry) || !fhp->fh_post_saved)
470 if (!svcxdr_encode_pre_op_attr(xdr, fhp))
474 if (xdr_stream_encode_item_present(xdr) < 0)
476 if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &fhp->fh_post_attr))
482 if (xdr_stream_encode_item_absent(xdr) < 0)
484 if (!svcxdr_encode_post_op_attr(rqstp, xdr, fhp))
491 * XDR decode functions
495 nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
497 struct nfsd_fhandle *args = rqstp->rq_argp;
499 return svcxdr_decode_nfs_fh3(xdr, &args->fh);
503 nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
505 struct nfsd3_sattrargs *args = rqstp->rq_argp;
507 return svcxdr_decode_nfs_fh3(xdr, &args->fh) &&
508 svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
509 svcxdr_decode_sattrguard3(xdr, args);
513 nfs3svc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
515 struct nfsd3_diropargs *args = rqstp->rq_argp;
517 return svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len);
521 nfs3svc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
523 struct nfsd3_accessargs *args = rqstp->rq_argp;
525 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
527 if (xdr_stream_decode_u32(xdr, &args->access) < 0)
534 nfs3svc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
536 struct nfsd3_readargs *args = rqstp->rq_argp;
538 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
540 if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
542 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
549 nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
551 struct nfsd3_writeargs *args = rqstp->rq_argp;
552 u32 max_blocksize = svc_max_payload(rqstp);
554 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
556 if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
558 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
560 if (xdr_stream_decode_u32(xdr, &args->stable) < 0)
564 if (xdr_stream_decode_u32(xdr, &args->len) < 0)
568 if (args->count != args->len)
570 if (args->count > max_blocksize) {
571 args->count = max_blocksize;
572 args->len = max_blocksize;
575 return xdr_stream_subsegment(xdr, &args->payload, args->count);
579 nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
581 struct nfsd3_createargs *args = rqstp->rq_argp;
583 if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
585 if (xdr_stream_decode_u32(xdr, &args->createmode) < 0)
587 switch (args->createmode) {
588 case NFS3_CREATE_UNCHECKED:
589 case NFS3_CREATE_GUARDED:
590 return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
591 case NFS3_CREATE_EXCLUSIVE:
592 args->verf = xdr_inline_decode(xdr, NFS3_CREATEVERFSIZE);
603 nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
605 struct nfsd3_createargs *args = rqstp->rq_argp;
607 return svcxdr_decode_diropargs3(xdr, &args->fh,
608 &args->name, &args->len) &&
609 svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
613 nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
615 struct nfsd3_symlinkargs *args = rqstp->rq_argp;
616 struct kvec *head = rqstp->rq_arg.head;
618 if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
620 if (!svcxdr_decode_sattr3(rqstp, xdr, &args->attrs))
622 if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
626 args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
627 args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
628 return args->first.iov_base != NULL;
632 nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
634 struct nfsd3_mknodargs *args = rqstp->rq_argp;
636 if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
638 if (xdr_stream_decode_u32(xdr, &args->ftype) < 0)
640 switch (args->ftype) {
643 return svcxdr_decode_devicedata3(rqstp, xdr, args);
646 return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
650 /* Valid XDR but illegal file types */
660 nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
662 struct nfsd3_renameargs *args = rqstp->rq_argp;
664 return svcxdr_decode_diropargs3(xdr, &args->ffh,
665 &args->fname, &args->flen) &&
666 svcxdr_decode_diropargs3(xdr, &args->tfh,
667 &args->tname, &args->tlen);
671 nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
673 struct nfsd3_linkargs *args = rqstp->rq_argp;
675 return svcxdr_decode_nfs_fh3(xdr, &args->ffh) &&
676 svcxdr_decode_diropargs3(xdr, &args->tfh,
677 &args->tname, &args->tlen);
681 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
683 struct nfsd3_readdirargs *args = rqstp->rq_argp;
685 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
687 if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
689 args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
692 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
699 nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
701 struct nfsd3_readdirargs *args = rqstp->rq_argp;
704 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
706 if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
708 args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
711 /* dircount is ignored */
712 if (xdr_stream_decode_u32(xdr, &dircount) < 0)
714 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
721 nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
723 struct nfsd3_commitargs *args = rqstp->rq_argp;
725 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
727 if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
729 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
736 * XDR encode functions
741 nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
743 struct nfsd3_attrstat *resp = rqstp->rq_resp;
745 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
747 switch (resp->status) {
749 lease_get_mtime(d_inode(resp->fh.fh_dentry), &resp->stat.mtime);
750 if (!svcxdr_encode_fattr3(rqstp, xdr, &resp->fh, &resp->stat))
758 /* SETATTR, REMOVE, RMDIR */
760 nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr)
762 struct nfsd3_attrstat *resp = rqstp->rq_resp;
764 return svcxdr_encode_nfsstat3(xdr, resp->status) &&
765 svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
770 nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
772 struct nfsd3_diropres *resp = rqstp->rq_resp;
774 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
776 switch (resp->status) {
778 if (!svcxdr_encode_nfs_fh3(xdr, &resp->fh))
780 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
782 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
786 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
795 nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
797 struct nfsd3_accessres *resp = rqstp->rq_resp;
799 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
801 switch (resp->status) {
803 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
805 if (xdr_stream_encode_u32(xdr, resp->access) < 0)
809 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
818 nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
820 struct nfsd3_readlinkres *resp = rqstp->rq_resp;
821 struct kvec *head = rqstp->rq_res.head;
823 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
825 switch (resp->status) {
827 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
829 if (xdr_stream_encode_u32(xdr, resp->len) < 0)
831 svcxdr_encode_opaque_pages(rqstp, xdr, resp->pages, 0,
833 if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
837 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
846 nfs3svc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
848 struct nfsd3_readres *resp = rqstp->rq_resp;
849 struct kvec *head = rqstp->rq_res.head;
851 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
853 switch (resp->status) {
855 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
857 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
859 if (xdr_stream_encode_bool(xdr, resp->eof) < 0)
861 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
863 svcxdr_encode_opaque_pages(rqstp, xdr, resp->pages,
864 rqstp->rq_res.page_base,
866 if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
870 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
879 nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
881 struct nfsd3_writeres *resp = rqstp->rq_resp;
883 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
885 switch (resp->status) {
887 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
889 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
891 if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
893 if (!svcxdr_encode_writeverf3(xdr, resp->verf))
897 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
904 /* CREATE, MKDIR, SYMLINK, MKNOD */
906 nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
908 struct nfsd3_diropres *resp = rqstp->rq_resp;
910 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
912 switch (resp->status) {
914 if (!svcxdr_encode_post_op_fh3(xdr, &resp->fh))
916 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
918 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
922 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
931 nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
933 struct nfsd3_renameres *resp = rqstp->rq_resp;
935 return svcxdr_encode_nfsstat3(xdr, resp->status) &&
936 svcxdr_encode_wcc_data(rqstp, xdr, &resp->ffh) &&
937 svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
942 nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
944 struct nfsd3_linkres *resp = rqstp->rq_resp;
946 return svcxdr_encode_nfsstat3(xdr, resp->status) &&
947 svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh) &&
948 svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
953 nfs3svc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
955 struct nfsd3_readdirres *resp = rqstp->rq_resp;
956 struct xdr_buf *dirlist = &resp->dirlist;
958 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
960 switch (resp->status) {
962 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
964 if (!svcxdr_encode_cookieverf3(xdr, resp->verf))
966 svcxdr_encode_opaque_pages(rqstp, xdr, dirlist->pages, 0,
968 /* no more entries */
969 if (xdr_stream_encode_item_absent(xdr) < 0)
971 if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
975 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
983 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
984 const char *name, int namlen, u64 ino)
986 struct svc_export *exp;
987 struct dentry *dparent, *dchild;
988 __be32 rv = nfserr_noent;
990 dparent = cd->fh.fh_dentry;
991 exp = cd->fh.fh_export;
993 if (isdotent(name, namlen)) {
995 dchild = dget_parent(dparent);
997 * Don't return filehandle for ".." if we're at
998 * the filesystem or export root:
1000 if (dchild == dparent)
1002 if (dparent == exp->ex_path.dentry)
1005 dchild = dget(dparent);
1007 dchild = lookup_positive_unlocked(name, dparent, namlen);
1010 if (d_mountpoint(dchild))
1012 if (dchild->d_inode->i_ino != ino)
1014 rv = fh_compose(fhp, exp, dchild, &cd->fh);
1021 * nfs3svc_encode_cookie3 - Encode a directory offset cookie
1022 * @resp: readdir result context
1023 * @offset: offset cookie to encode
1025 * The buffer space for the offset cookie has already been reserved
1026 * by svcxdr_encode_entry3_common().
1028 void nfs3svc_encode_cookie3(struct nfsd3_readdirres *resp, u64 offset)
1030 __be64 cookie = cpu_to_be64(offset);
1032 if (!resp->cookie_offset)
1034 write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
1036 resp->cookie_offset = 0;
1040 svcxdr_encode_entry3_common(struct nfsd3_readdirres *resp, const char *name,
1041 int namlen, loff_t offset, u64 ino)
1043 struct xdr_buf *dirlist = &resp->dirlist;
1044 struct xdr_stream *xdr = &resp->xdr;
1046 if (xdr_stream_encode_item_present(xdr) < 0)
1049 if (xdr_stream_encode_u64(xdr, ino) < 0)
1052 if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS3_MAXNAMLEN)) < 0)
1055 resp->cookie_offset = dirlist->len;
1056 if (xdr_stream_encode_u64(xdr, OFFSET_MAX) < 0)
1063 * nfs3svc_encode_entry3 - encode one NFSv3 READDIR entry
1064 * @data: directory context
1065 * @name: name of the object to be encoded
1066 * @namlen: length of that name, in bytes
1067 * @offset: the offset of the previous entry
1068 * @ino: the fileid of this entry
1072 * %0: Entry was successfully encoded.
1073 * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
1075 * On exit, the following fields are updated:
1077 * - resp->common.err
1078 * - resp->cookie_offset
1080 int nfs3svc_encode_entry3(void *data, const char *name, int namlen,
1081 loff_t offset, u64 ino, unsigned int d_type)
1083 struct readdir_cd *ccd = data;
1084 struct nfsd3_readdirres *resp = container_of(ccd,
1085 struct nfsd3_readdirres,
1087 unsigned int starting_length = resp->dirlist.len;
1089 /* The offset cookie for the previous entry */
1090 nfs3svc_encode_cookie3(resp, offset);
1092 if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
1095 xdr_commit_encode(&resp->xdr);
1096 resp->common.err = nfs_ok;
1100 resp->cookie_offset = 0;
1101 resp->common.err = nfserr_toosmall;
1102 resp->dirlist.len = starting_length;
1107 svcxdr_encode_entry3_plus(struct nfsd3_readdirres *resp, const char *name,
1108 int namlen, u64 ino)
1110 struct xdr_stream *xdr = &resp->xdr;
1111 struct svc_fh *fhp = &resp->scratch;
1115 fh_init(fhp, NFS3_FHSIZE);
1116 if (compose_entry_fh(resp, fhp, name, namlen, ino) != nfs_ok)
1119 if (!svcxdr_encode_post_op_attr(resp->rqstp, xdr, fhp))
1121 if (!svcxdr_encode_post_op_fh3(xdr, fhp))
1130 if (xdr_stream_encode_item_absent(xdr) < 0)
1132 if (xdr_stream_encode_item_absent(xdr) < 0)
1138 * nfs3svc_encode_entryplus3 - encode one NFSv3 READDIRPLUS entry
1139 * @data: directory context
1140 * @name: name of the object to be encoded
1141 * @namlen: length of that name, in bytes
1142 * @offset: the offset of the previous entry
1143 * @ino: the fileid of this entry
1147 * %0: Entry was successfully encoded.
1148 * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
1150 * On exit, the following fields are updated:
1152 * - resp->common.err
1153 * - resp->cookie_offset
1155 int nfs3svc_encode_entryplus3(void *data, const char *name, int namlen,
1156 loff_t offset, u64 ino, unsigned int d_type)
1158 struct readdir_cd *ccd = data;
1159 struct nfsd3_readdirres *resp = container_of(ccd,
1160 struct nfsd3_readdirres,
1162 unsigned int starting_length = resp->dirlist.len;
1164 /* The offset cookie for the previous entry */
1165 nfs3svc_encode_cookie3(resp, offset);
1167 if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
1169 if (!svcxdr_encode_entry3_plus(resp, name, namlen, ino))
1172 xdr_commit_encode(&resp->xdr);
1173 resp->common.err = nfs_ok;
1177 resp->cookie_offset = 0;
1178 resp->common.err = nfserr_toosmall;
1179 resp->dirlist.len = starting_length;
1184 svcxdr_encode_fsstat3resok(struct xdr_stream *xdr,
1185 const struct nfsd3_fsstatres *resp)
1187 const struct kstatfs *s = &resp->stats;
1188 u64 bs = s->f_bsize;
1191 p = xdr_reserve_space(xdr, XDR_UNIT * 13);
1194 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
1195 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
1196 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
1197 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
1198 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
1199 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
1200 *p = cpu_to_be32(resp->invarsec); /* mean unchanged time */
1207 nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1209 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
1211 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1213 switch (resp->status) {
1215 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1217 if (!svcxdr_encode_fsstat3resok(xdr, resp))
1221 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1229 svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
1230 const struct nfsd3_fsinfores *resp)
1234 p = xdr_reserve_space(xdr, XDR_UNIT * 12);
1237 *p++ = cpu_to_be32(resp->f_rtmax);
1238 *p++ = cpu_to_be32(resp->f_rtpref);
1239 *p++ = cpu_to_be32(resp->f_rtmult);
1240 *p++ = cpu_to_be32(resp->f_wtmax);
1241 *p++ = cpu_to_be32(resp->f_wtpref);
1242 *p++ = cpu_to_be32(resp->f_wtmult);
1243 *p++ = cpu_to_be32(resp->f_dtpref);
1244 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1245 p = encode_nfstime3(p, &nfs3svc_time_delta);
1246 *p = cpu_to_be32(resp->f_properties);
1253 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1255 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
1257 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1259 switch (resp->status) {
1261 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1263 if (!svcxdr_encode_fsinfo3resok(xdr, resp))
1267 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1275 svcxdr_encode_pathconf3resok(struct xdr_stream *xdr,
1276 const struct nfsd3_pathconfres *resp)
1280 p = xdr_reserve_space(xdr, XDR_UNIT * 6);
1283 *p++ = cpu_to_be32(resp->p_link_max);
1284 *p++ = cpu_to_be32(resp->p_name_max);
1285 p = xdr_encode_bool(p, resp->p_no_trunc);
1286 p = xdr_encode_bool(p, resp->p_chown_restricted);
1287 p = xdr_encode_bool(p, resp->p_case_insensitive);
1288 xdr_encode_bool(p, resp->p_case_preserving);
1295 nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1297 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
1299 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1301 switch (resp->status) {
1303 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1305 if (!svcxdr_encode_pathconf3resok(xdr, resp))
1309 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1318 nfs3svc_encode_commitres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1320 struct nfsd3_commitres *resp = rqstp->rq_resp;
1322 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1324 switch (resp->status) {
1326 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
1328 if (!svcxdr_encode_writeverf3(xdr, resp->verf))
1332 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
1340 * XDR release functions
1343 nfs3svc_release_fhandle(struct svc_rqst *rqstp)
1345 struct nfsd3_attrstat *resp = rqstp->rq_resp;
1351 nfs3svc_release_fhandle2(struct svc_rqst *rqstp)
1353 struct nfsd3_fhandle_pair *resp = rqstp->rq_resp;