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;
574 if (!xdr_stream_subsegment(xdr, &args->payload, args->count))
581 nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
583 struct nfsd3_createargs *args = rqstp->rq_argp;
585 if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
587 if (xdr_stream_decode_u32(xdr, &args->createmode) < 0)
589 switch (args->createmode) {
590 case NFS3_CREATE_UNCHECKED:
591 case NFS3_CREATE_GUARDED:
592 return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
593 case NFS3_CREATE_EXCLUSIVE:
594 args->verf = xdr_inline_decode(xdr, NFS3_CREATEVERFSIZE);
605 nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
607 struct nfsd3_createargs *args = rqstp->rq_argp;
609 return svcxdr_decode_diropargs3(xdr, &args->fh,
610 &args->name, &args->len) &&
611 svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
615 nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
617 struct nfsd3_symlinkargs *args = rqstp->rq_argp;
618 struct kvec *head = rqstp->rq_arg.head;
619 struct kvec *tail = rqstp->rq_arg.tail;
622 if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
624 if (!svcxdr_decode_sattr3(rqstp, xdr, &args->attrs))
626 if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
630 remaining = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len;
631 remaining -= xdr_stream_pos(xdr);
632 if (remaining < xdr_align_size(args->tlen))
635 args->first.iov_base = xdr->p;
636 args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
642 nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
644 struct nfsd3_mknodargs *args = rqstp->rq_argp;
646 if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
648 if (xdr_stream_decode_u32(xdr, &args->ftype) < 0)
650 switch (args->ftype) {
653 return svcxdr_decode_devicedata3(rqstp, xdr, args);
656 return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
660 /* Valid XDR but illegal file types */
670 nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
672 struct nfsd3_renameargs *args = rqstp->rq_argp;
674 return svcxdr_decode_diropargs3(xdr, &args->ffh,
675 &args->fname, &args->flen) &&
676 svcxdr_decode_diropargs3(xdr, &args->tfh,
677 &args->tname, &args->tlen);
681 nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
683 struct nfsd3_linkargs *args = rqstp->rq_argp;
685 return svcxdr_decode_nfs_fh3(xdr, &args->ffh) &&
686 svcxdr_decode_diropargs3(xdr, &args->tfh,
687 &args->tname, &args->tlen);
691 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
693 struct nfsd3_readdirargs *args = rqstp->rq_argp;
695 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
697 if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
699 args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
702 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
709 nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
711 struct nfsd3_readdirargs *args = rqstp->rq_argp;
714 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
716 if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
718 args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
721 /* dircount is ignored */
722 if (xdr_stream_decode_u32(xdr, &dircount) < 0)
724 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
731 nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
733 struct nfsd3_commitargs *args = rqstp->rq_argp;
735 if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
737 if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
739 if (xdr_stream_decode_u32(xdr, &args->count) < 0)
746 * XDR encode functions
751 nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
753 struct nfsd3_attrstat *resp = rqstp->rq_resp;
755 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
757 switch (resp->status) {
759 lease_get_mtime(d_inode(resp->fh.fh_dentry), &resp->stat.mtime);
760 if (!svcxdr_encode_fattr3(rqstp, xdr, &resp->fh, &resp->stat))
768 /* SETATTR, REMOVE, RMDIR */
770 nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr)
772 struct nfsd3_attrstat *resp = rqstp->rq_resp;
774 return svcxdr_encode_nfsstat3(xdr, resp->status) &&
775 svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
780 nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
782 struct nfsd3_diropres *resp = rqstp->rq_resp;
784 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
786 switch (resp->status) {
788 if (!svcxdr_encode_nfs_fh3(xdr, &resp->fh))
790 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
792 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
796 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
805 nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
807 struct nfsd3_accessres *resp = rqstp->rq_resp;
809 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
811 switch (resp->status) {
813 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
815 if (xdr_stream_encode_u32(xdr, resp->access) < 0)
819 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
828 nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
830 struct nfsd3_readlinkres *resp = rqstp->rq_resp;
831 struct kvec *head = rqstp->rq_res.head;
833 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
835 switch (resp->status) {
837 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
839 if (xdr_stream_encode_u32(xdr, resp->len) < 0)
841 xdr_write_pages(xdr, resp->pages, 0, resp->len);
842 if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
846 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
855 nfs3svc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
857 struct nfsd3_readres *resp = rqstp->rq_resp;
858 struct kvec *head = rqstp->rq_res.head;
860 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
862 switch (resp->status) {
864 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
866 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
868 if (xdr_stream_encode_bool(xdr, resp->eof) < 0)
870 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
872 xdr_write_pages(xdr, resp->pages, rqstp->rq_res.page_base,
874 if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
878 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
887 nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
889 struct nfsd3_writeres *resp = rqstp->rq_resp;
891 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
893 switch (resp->status) {
895 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
897 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
899 if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
901 if (!svcxdr_encode_writeverf3(xdr, resp->verf))
905 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
912 /* CREATE, MKDIR, SYMLINK, MKNOD */
914 nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
916 struct nfsd3_diropres *resp = rqstp->rq_resp;
918 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
920 switch (resp->status) {
922 if (!svcxdr_encode_post_op_fh3(xdr, &resp->fh))
924 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
926 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
930 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
939 nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
941 struct nfsd3_renameres *resp = rqstp->rq_resp;
943 return svcxdr_encode_nfsstat3(xdr, resp->status) &&
944 svcxdr_encode_wcc_data(rqstp, xdr, &resp->ffh) &&
945 svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
950 nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
952 struct nfsd3_linkres *resp = rqstp->rq_resp;
954 return svcxdr_encode_nfsstat3(xdr, resp->status) &&
955 svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh) &&
956 svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
961 nfs3svc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
963 struct nfsd3_readdirres *resp = rqstp->rq_resp;
964 struct xdr_buf *dirlist = &resp->dirlist;
966 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
968 switch (resp->status) {
970 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
972 if (!svcxdr_encode_cookieverf3(xdr, resp->verf))
974 xdr_write_pages(xdr, dirlist->pages, 0, dirlist->len);
975 /* no more entries */
976 if (xdr_stream_encode_item_absent(xdr) < 0)
978 if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
982 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
990 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
991 const char *name, int namlen, u64 ino)
993 struct svc_export *exp;
994 struct dentry *dparent, *dchild;
995 __be32 rv = nfserr_noent;
997 dparent = cd->fh.fh_dentry;
998 exp = cd->fh.fh_export;
1000 if (isdotent(name, namlen)) {
1002 dchild = dget_parent(dparent);
1004 * Don't return filehandle for ".." if we're at
1005 * the filesystem or export root:
1007 if (dchild == dparent)
1009 if (dparent == exp->ex_path.dentry)
1012 dchild = dget(dparent);
1014 dchild = lookup_positive_unlocked(name, dparent, namlen);
1017 if (d_mountpoint(dchild))
1019 if (dchild->d_inode->i_ino != ino)
1021 rv = fh_compose(fhp, exp, dchild, &cd->fh);
1028 * nfs3svc_encode_cookie3 - Encode a directory offset cookie
1029 * @resp: readdir result context
1030 * @offset: offset cookie to encode
1032 * The buffer space for the offset cookie has already been reserved
1033 * by svcxdr_encode_entry3_common().
1035 void nfs3svc_encode_cookie3(struct nfsd3_readdirres *resp, u64 offset)
1037 __be64 cookie = cpu_to_be64(offset);
1039 if (!resp->cookie_offset)
1041 write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
1043 resp->cookie_offset = 0;
1047 svcxdr_encode_entry3_common(struct nfsd3_readdirres *resp, const char *name,
1048 int namlen, loff_t offset, u64 ino)
1050 struct xdr_buf *dirlist = &resp->dirlist;
1051 struct xdr_stream *xdr = &resp->xdr;
1053 if (xdr_stream_encode_item_present(xdr) < 0)
1056 if (xdr_stream_encode_u64(xdr, ino) < 0)
1059 if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS3_MAXNAMLEN)) < 0)
1062 resp->cookie_offset = dirlist->len;
1063 if (xdr_stream_encode_u64(xdr, OFFSET_MAX) < 0)
1070 * nfs3svc_encode_entry3 - encode one NFSv3 READDIR entry
1071 * @data: directory context
1072 * @name: name of the object to be encoded
1073 * @namlen: length of that name, in bytes
1074 * @offset: the offset of the previous entry
1075 * @ino: the fileid of this entry
1079 * %0: Entry was successfully encoded.
1080 * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
1082 * On exit, the following fields are updated:
1084 * - resp->common.err
1085 * - resp->cookie_offset
1087 int nfs3svc_encode_entry3(void *data, const char *name, int namlen,
1088 loff_t offset, u64 ino, unsigned int d_type)
1090 struct readdir_cd *ccd = data;
1091 struct nfsd3_readdirres *resp = container_of(ccd,
1092 struct nfsd3_readdirres,
1094 unsigned int starting_length = resp->dirlist.len;
1096 /* The offset cookie for the previous entry */
1097 nfs3svc_encode_cookie3(resp, offset);
1099 if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
1102 xdr_commit_encode(&resp->xdr);
1103 resp->common.err = nfs_ok;
1107 resp->cookie_offset = 0;
1108 resp->common.err = nfserr_toosmall;
1109 resp->dirlist.len = starting_length;
1114 svcxdr_encode_entry3_plus(struct nfsd3_readdirres *resp, const char *name,
1115 int namlen, u64 ino)
1117 struct xdr_stream *xdr = &resp->xdr;
1118 struct svc_fh *fhp = &resp->scratch;
1122 fh_init(fhp, NFS3_FHSIZE);
1123 if (compose_entry_fh(resp, fhp, name, namlen, ino) != nfs_ok)
1126 if (!svcxdr_encode_post_op_attr(resp->rqstp, xdr, fhp))
1128 if (!svcxdr_encode_post_op_fh3(xdr, fhp))
1137 if (xdr_stream_encode_item_absent(xdr) < 0)
1139 if (xdr_stream_encode_item_absent(xdr) < 0)
1145 * nfs3svc_encode_entryplus3 - encode one NFSv3 READDIRPLUS entry
1146 * @data: directory context
1147 * @name: name of the object to be encoded
1148 * @namlen: length of that name, in bytes
1149 * @offset: the offset of the previous entry
1150 * @ino: the fileid of this entry
1154 * %0: Entry was successfully encoded.
1155 * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
1157 * On exit, the following fields are updated:
1159 * - resp->common.err
1160 * - resp->cookie_offset
1162 int nfs3svc_encode_entryplus3(void *data, const char *name, int namlen,
1163 loff_t offset, u64 ino, unsigned int d_type)
1165 struct readdir_cd *ccd = data;
1166 struct nfsd3_readdirres *resp = container_of(ccd,
1167 struct nfsd3_readdirres,
1169 unsigned int starting_length = resp->dirlist.len;
1171 /* The offset cookie for the previous entry */
1172 nfs3svc_encode_cookie3(resp, offset);
1174 if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
1176 if (!svcxdr_encode_entry3_plus(resp, name, namlen, ino))
1179 xdr_commit_encode(&resp->xdr);
1180 resp->common.err = nfs_ok;
1184 resp->cookie_offset = 0;
1185 resp->common.err = nfserr_toosmall;
1186 resp->dirlist.len = starting_length;
1191 svcxdr_encode_fsstat3resok(struct xdr_stream *xdr,
1192 const struct nfsd3_fsstatres *resp)
1194 const struct kstatfs *s = &resp->stats;
1195 u64 bs = s->f_bsize;
1198 p = xdr_reserve_space(xdr, XDR_UNIT * 13);
1201 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
1202 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
1203 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
1204 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
1205 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
1206 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
1207 *p = cpu_to_be32(resp->invarsec); /* mean unchanged time */
1214 nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1216 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
1218 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1220 switch (resp->status) {
1222 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1224 if (!svcxdr_encode_fsstat3resok(xdr, resp))
1228 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1236 svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
1237 const struct nfsd3_fsinfores *resp)
1241 p = xdr_reserve_space(xdr, XDR_UNIT * 12);
1244 *p++ = cpu_to_be32(resp->f_rtmax);
1245 *p++ = cpu_to_be32(resp->f_rtpref);
1246 *p++ = cpu_to_be32(resp->f_rtmult);
1247 *p++ = cpu_to_be32(resp->f_wtmax);
1248 *p++ = cpu_to_be32(resp->f_wtpref);
1249 *p++ = cpu_to_be32(resp->f_wtmult);
1250 *p++ = cpu_to_be32(resp->f_dtpref);
1251 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1252 p = encode_nfstime3(p, &nfs3svc_time_delta);
1253 *p = cpu_to_be32(resp->f_properties);
1260 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1262 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
1264 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1266 switch (resp->status) {
1268 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1270 if (!svcxdr_encode_fsinfo3resok(xdr, resp))
1274 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1282 svcxdr_encode_pathconf3resok(struct xdr_stream *xdr,
1283 const struct nfsd3_pathconfres *resp)
1287 p = xdr_reserve_space(xdr, XDR_UNIT * 6);
1290 *p++ = cpu_to_be32(resp->p_link_max);
1291 *p++ = cpu_to_be32(resp->p_name_max);
1292 p = xdr_encode_bool(p, resp->p_no_trunc);
1293 p = xdr_encode_bool(p, resp->p_chown_restricted);
1294 p = xdr_encode_bool(p, resp->p_case_insensitive);
1295 xdr_encode_bool(p, resp->p_case_preserving);
1302 nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1304 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
1306 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1308 switch (resp->status) {
1310 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1312 if (!svcxdr_encode_pathconf3resok(xdr, resp))
1316 if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
1325 nfs3svc_encode_commitres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
1327 struct nfsd3_commitres *resp = rqstp->rq_resp;
1329 if (!svcxdr_encode_nfsstat3(xdr, resp->status))
1331 switch (resp->status) {
1333 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
1335 if (!svcxdr_encode_writeverf3(xdr, resp->verf))
1339 if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
1347 * XDR release functions
1350 nfs3svc_release_fhandle(struct svc_rqst *rqstp)
1352 struct nfsd3_attrstat *resp = rqstp->rq_resp;
1358 nfs3svc_release_fhandle2(struct svc_rqst *rqstp)
1360 struct nfsd3_fhandle_pair *resp = rqstp->rq_resp;