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nfs3xdr.c
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// SPDX-License-Identifier: GPL-2.0
/*
* XDR support for nfsd/protocol version 3.
*
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <[email protected]>
*
* 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
*/
#include <linux/namei.h>
#include <linux/sunrpc/svc_xprt.h>
#include "xdr3.h"
#include "auth.h"
#include "netns.h"
#include "vfs.h"
/*
* Force construction of an empty post-op attr
*/
static const struct svc_fh nfs3svc_null_fh = {
.fh_no_wcc = true,
};
/*
* time_delta. {1, 0} means the server is accurate only
* to the nearest second.
*/
static const struct timespec64 nfs3svc_time_delta = {
.tv_sec = 1,
.tv_nsec = 0,
};
/*
* Mapping of S_IF* types to NFS file types
*/
static const u32 nfs3_ftypes[] = {
NF3NON, NF3FIFO, NF3CHR, NF3BAD,
NF3DIR, NF3BAD, NF3BLK, NF3BAD,
NF3REG, NF3BAD, NF3LNK, NF3BAD,
NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
};
/*
* Basic NFSv3 data types (RFC 1813 Sections 2.5 and 2.6)
*/
static __be32 *
encode_nfstime3(__be32 *p, const struct timespec64 *time)
{
*p++ = cpu_to_be32((u32)time->tv_sec);
*p++ = cpu_to_be32(time->tv_nsec);
return p;
}
static bool
svcxdr_decode_nfstime3(struct xdr_stream *xdr, struct timespec64 *timep)
{
__be32 *p;
p = xdr_inline_decode(xdr, XDR_UNIT * 2);
if (!p)
return false;
timep->tv_sec = be32_to_cpup(p++);
timep->tv_nsec = be32_to_cpup(p);
return true;
}
/**
* svcxdr_decode_nfs_fh3 - Decode an NFSv3 file handle
* @xdr: XDR stream positioned at an undecoded NFSv3 FH
* @fhp: OUT: filled-in server file handle
*
* Return values:
* %false: The encoded file handle was not valid
* %true: @fhp has been initialized
*/
bool
svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp)
{
__be32 *p;
u32 size;
if (xdr_stream_decode_u32(xdr, &size) < 0)
return false;
if (size == 0 || size > NFS3_FHSIZE)
return false;
p = xdr_inline_decode(xdr, size);
if (!p)
return false;
fh_init(fhp, NFS3_FHSIZE);
fhp->fh_handle.fh_size = size;
memcpy(&fhp->fh_handle.fh_raw, p, size);
return true;
}
/**
* svcxdr_encode_nfsstat3 - Encode an NFSv3 status code
* @xdr: XDR stream
* @status: status value to encode
*
* Return values:
* %false: Send buffer space was exhausted
* %true: Success
*/
bool
svcxdr_encode_nfsstat3(struct xdr_stream *xdr, __be32 status)
{
__be32 *p;
p = xdr_reserve_space(xdr, sizeof(status));
if (!p)
return false;
*p = status;
return true;
}
static bool
svcxdr_encode_nfs_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
u32 size = fhp->fh_handle.fh_size;
__be32 *p;
p = xdr_reserve_space(xdr, XDR_UNIT + size);
if (!p)
return false;
*p++ = cpu_to_be32(size);
if (size)
p[XDR_QUADLEN(size) - 1] = 0;
memcpy(p, &fhp->fh_handle.fh_raw, size);
return true;
}
static bool
svcxdr_encode_post_op_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
if (xdr_stream_encode_item_present(xdr) < 0)
return false;
if (!svcxdr_encode_nfs_fh3(xdr, fhp))
return false;
return true;
}
static bool
svcxdr_encode_cookieverf3(struct xdr_stream *xdr, const __be32 *verf)
{
__be32 *p;
p = xdr_reserve_space(xdr, NFS3_COOKIEVERFSIZE);
if (!p)
return false;
memcpy(p, verf, NFS3_COOKIEVERFSIZE);
return true;
}
static bool
svcxdr_encode_writeverf3(struct xdr_stream *xdr, const __be32 *verf)
{
__be32 *p;
p = xdr_reserve_space(xdr, NFS3_WRITEVERFSIZE);
if (!p)
return false;
memcpy(p, verf, NFS3_WRITEVERFSIZE);
return true;
}
static bool
svcxdr_decode_filename3(struct xdr_stream *xdr, char **name, unsigned int *len)
{
u32 size, i;
__be32 *p;
char *c;
if (xdr_stream_decode_u32(xdr, &size) < 0)
return false;
if (size == 0 || size > NFS3_MAXNAMLEN)
return false;
p = xdr_inline_decode(xdr, size);
if (!p)
return false;
*len = size;
*name = (char *)p;
for (i = 0, c = *name; i < size; i++, c++) {
if (*c == '\0' || *c == '/')
return false;
}
return true;
}
static bool
svcxdr_decode_diropargs3(struct xdr_stream *xdr, struct svc_fh *fhp,
char **name, unsigned int *len)
{
return svcxdr_decode_nfs_fh3(xdr, fhp) &&
svcxdr_decode_filename3(xdr, name, len);
}
static bool
svcxdr_decode_sattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
struct iattr *iap)
{
u32 set_it;
iap->ia_valid = 0;
if (xdr_stream_decode_bool(xdr, &set_it) < 0)
return false;
if (set_it) {
u32 mode;
if (xdr_stream_decode_u32(xdr, &mode) < 0)
return false;
iap->ia_valid |= ATTR_MODE;
iap->ia_mode = mode;
}
if (xdr_stream_decode_bool(xdr, &set_it) < 0)
return false;
if (set_it) {
u32 uid;
if (xdr_stream_decode_u32(xdr, &uid) < 0)
return false;
iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), uid);
if (uid_valid(iap->ia_uid))
iap->ia_valid |= ATTR_UID;
}
if (xdr_stream_decode_bool(xdr, &set_it) < 0)
return false;
if (set_it) {
u32 gid;
if (xdr_stream_decode_u32(xdr, &gid) < 0)
return false;
iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), gid);
if (gid_valid(iap->ia_gid))
iap->ia_valid |= ATTR_GID;
}
if (xdr_stream_decode_bool(xdr, &set_it) < 0)
return false;
if (set_it) {
u64 newsize;
if (xdr_stream_decode_u64(xdr, &newsize) < 0)
return false;
iap->ia_valid |= ATTR_SIZE;
iap->ia_size = newsize;
}
if (xdr_stream_decode_u32(xdr, &set_it) < 0)
return false;
switch (set_it) {
case DONT_CHANGE:
break;
case SET_TO_SERVER_TIME:
iap->ia_valid |= ATTR_ATIME;
break;
case SET_TO_CLIENT_TIME:
if (!svcxdr_decode_nfstime3(xdr, &iap->ia_atime))
return false;
iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
break;
default:
return false;
}
if (xdr_stream_decode_u32(xdr, &set_it) < 0)
return false;
switch (set_it) {
case DONT_CHANGE:
break;
case SET_TO_SERVER_TIME:
iap->ia_valid |= ATTR_MTIME;
break;
case SET_TO_CLIENT_TIME:
if (!svcxdr_decode_nfstime3(xdr, &iap->ia_mtime))
return false;
iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
break;
default:
return false;
}
return true;
}
static bool
svcxdr_decode_sattrguard3(struct xdr_stream *xdr, struct nfsd3_sattrargs *args)
{
__be32 *p;
u32 check;
if (xdr_stream_decode_bool(xdr, &check) < 0)
return false;
if (check) {
p = xdr_inline_decode(xdr, XDR_UNIT * 2);
if (!p)
return false;
args->check_guard = 1;
args->guardtime = be32_to_cpup(p);
} else
args->check_guard = 0;
return true;
}
static bool
svcxdr_decode_specdata3(struct xdr_stream *xdr, struct nfsd3_mknodargs *args)
{
__be32 *p;
p = xdr_inline_decode(xdr, XDR_UNIT * 2);
if (!p)
return false;
args->major = be32_to_cpup(p++);
args->minor = be32_to_cpup(p);
return true;
}
static bool
svcxdr_decode_devicedata3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
struct nfsd3_mknodargs *args)
{
return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
svcxdr_decode_specdata3(xdr, args);
}
static bool
svcxdr_encode_fattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
const struct svc_fh *fhp, const struct kstat *stat)
{
struct user_namespace *userns = nfsd_user_namespace(rqstp);
__be32 *p;
u64 fsid;
p = xdr_reserve_space(xdr, XDR_UNIT * 21);
if (!p)
return false;
*p++ = cpu_to_be32(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
*p++ = cpu_to_be32((u32)(stat->mode & S_IALLUGO));
*p++ = cpu_to_be32((u32)stat->nlink);
*p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid));
*p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid));
if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN)
p = xdr_encode_hyper(p, (u64)NFS3_MAXPATHLEN);
else
p = xdr_encode_hyper(p, (u64)stat->size);
/* used */
p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
/* rdev */
*p++ = cpu_to_be32((u32)MAJOR(stat->rdev));
*p++ = cpu_to_be32((u32)MINOR(stat->rdev));
switch(fsid_source(fhp)) {
case FSIDSOURCE_FSID:
fsid = (u64)fhp->fh_export->ex_fsid;
break;
case FSIDSOURCE_UUID:
fsid = ((u64 *)fhp->fh_export->ex_uuid)[0];
fsid ^= ((u64 *)fhp->fh_export->ex_uuid)[1];
break;
default:
fsid = (u64)huge_encode_dev(fhp->fh_dentry->d_sb->s_dev);
}
p = xdr_encode_hyper(p, fsid);
/* fileid */
p = xdr_encode_hyper(p, stat->ino);
p = encode_nfstime3(p, &stat->atime);
p = encode_nfstime3(p, &stat->mtime);
encode_nfstime3(p, &stat->ctime);
return true;
}
static bool
svcxdr_encode_wcc_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
__be32 *p;
p = xdr_reserve_space(xdr, XDR_UNIT * 6);
if (!p)
return false;
p = xdr_encode_hyper(p, (u64)fhp->fh_pre_size);
p = encode_nfstime3(p, &fhp->fh_pre_mtime);
encode_nfstime3(p, &fhp->fh_pre_ctime);
return true;
}
static bool
svcxdr_encode_pre_op_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
if (!fhp->fh_pre_saved) {
if (xdr_stream_encode_item_absent(xdr) < 0)
return false;
return true;
}
if (xdr_stream_encode_item_present(xdr) < 0)
return false;
return svcxdr_encode_wcc_attr(xdr, fhp);
}
/**
* svcxdr_encode_post_op_attr - Encode NFSv3 post-op attributes
* @rqstp: Context of a completed RPC transaction
* @xdr: XDR stream
* @fhp: File handle to encode
*
* Return values:
* %false: Send buffer space was exhausted
* %true: Success
*/
bool
svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
const struct svc_fh *fhp)
{
struct dentry *dentry = fhp->fh_dentry;
struct kstat stat;
/*
* The inode may be NULL if the call failed because of a
* stale file handle. In this case, no attributes are
* returned.
*/
if (fhp->fh_no_wcc || !dentry || !d_really_is_positive(dentry))
goto no_post_op_attrs;
if (fh_getattr(fhp, &stat) != nfs_ok)
goto no_post_op_attrs;
if (xdr_stream_encode_item_present(xdr) < 0)
return false;
lease_get_mtime(d_inode(dentry), &stat.mtime);
if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &stat))
return false;
return true;
no_post_op_attrs:
return xdr_stream_encode_item_absent(xdr) > 0;
}
/*
* Encode weak cache consistency data
*/
static bool
svcxdr_encode_wcc_data(struct svc_rqst *rqstp, struct xdr_stream *xdr,
const struct svc_fh *fhp)
{
struct dentry *dentry = fhp->fh_dentry;
if (!dentry || !d_really_is_positive(dentry) || !fhp->fh_post_saved)
goto neither;
/* before */
if (!svcxdr_encode_pre_op_attr(xdr, fhp))
return false;
/* after */
if (xdr_stream_encode_item_present(xdr) < 0)
return false;
if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &fhp->fh_post_attr))
return false;
return true;
neither:
if (xdr_stream_encode_item_absent(xdr) < 0)
return false;
if (!svcxdr_encode_post_op_attr(rqstp, xdr, fhp))
return false;
return true;
}
/*
* XDR decode functions
*/
bool
nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_fhandle *args = rqstp->rq_argp;
return svcxdr_decode_nfs_fh3(xdr, &args->fh);
}
bool
nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_sattrargs *args = rqstp->rq_argp;
return svcxdr_decode_nfs_fh3(xdr, &args->fh) &&
svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
svcxdr_decode_sattrguard3(xdr, args);
}
bool
nfs3svc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_diropargs *args = rqstp->rq_argp;
return svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len);
}
bool
nfs3svc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_accessargs *args = rqstp->rq_argp;
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
return false;
if (xdr_stream_decode_u32(xdr, &args->access) < 0)
return false;
return true;
}
bool
nfs3svc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readargs *args = rqstp->rq_argp;
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
return false;
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
return false;
return true;
}
bool
nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_writeargs *args = rqstp->rq_argp;
u32 max_blocksize = svc_max_payload(rqstp);
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
return false;
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
return false;
if (xdr_stream_decode_u32(xdr, &args->stable) < 0)
return false;
/* opaque data */
if (xdr_stream_decode_u32(xdr, &args->len) < 0)
return false;
/* request sanity */
if (args->count != args->len)
return false;
if (args->count > max_blocksize) {
args->count = max_blocksize;
args->len = max_blocksize;
}
return xdr_stream_subsegment(xdr, &args->payload, args->count);
}
bool
nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_createargs *args = rqstp->rq_argp;
if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
return false;
if (xdr_stream_decode_u32(xdr, &args->createmode) < 0)
return false;
switch (args->createmode) {
case NFS3_CREATE_UNCHECKED:
case NFS3_CREATE_GUARDED:
return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
case NFS3_CREATE_EXCLUSIVE:
args->verf = xdr_inline_decode(xdr, NFS3_CREATEVERFSIZE);
if (!args->verf)
return false;
break;
default:
return false;
}
return true;
}
bool
nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_createargs *args = rqstp->rq_argp;
return svcxdr_decode_diropargs3(xdr, &args->fh,
&args->name, &args->len) &&
svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
}
bool
nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_symlinkargs *args = rqstp->rq_argp;
struct kvec *head = rqstp->rq_arg.head;
if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
return false;
if (!svcxdr_decode_sattr3(rqstp, xdr, &args->attrs))
return false;
if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
return false;
/* symlink_data */
args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
return args->first.iov_base != NULL;
}
bool
nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_mknodargs *args = rqstp->rq_argp;
if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
return false;
if (xdr_stream_decode_u32(xdr, &args->ftype) < 0)
return false;
switch (args->ftype) {
case NF3CHR:
case NF3BLK:
return svcxdr_decode_devicedata3(rqstp, xdr, args);
case NF3SOCK:
case NF3FIFO:
return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
case NF3REG:
case NF3DIR:
case NF3LNK:
/* Valid XDR but illegal file types */
break;
default:
return false;
}
return true;
}
bool
nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_renameargs *args = rqstp->rq_argp;
return svcxdr_decode_diropargs3(xdr, &args->ffh,
&args->fname, &args->flen) &&
svcxdr_decode_diropargs3(xdr, &args->tfh,
&args->tname, &args->tlen);
}
bool
nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_linkargs *args = rqstp->rq_argp;
return svcxdr_decode_nfs_fh3(xdr, &args->ffh) &&
svcxdr_decode_diropargs3(xdr, &args->tfh,
&args->tname, &args->tlen);
}
bool
nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readdirargs *args = rqstp->rq_argp;
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
return false;
if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
return false;
args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
if (!args->verf)
return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
return false;
return true;
}
bool
nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readdirargs *args = rqstp->rq_argp;
u32 dircount;
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
return false;
if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
return false;
args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
if (!args->verf)
return false;
/* dircount is ignored */
if (xdr_stream_decode_u32(xdr, &dircount) < 0)
return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
return false;
return true;
}
bool
nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_commitargs *args = rqstp->rq_argp;
if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
return false;
if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
return false;
if (xdr_stream_decode_u32(xdr, &args->count) < 0)
return false;
return true;
}
/*
* XDR encode functions
*/
/* GETATTR */
bool
nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
lease_get_mtime(d_inode(resp->fh.fh_dentry), &resp->stat.mtime);
if (!svcxdr_encode_fattr3(rqstp, xdr, &resp->fh, &resp->stat))
return false;
break;
}
return true;
}
/* SETATTR, REMOVE, RMDIR */
bool
nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
}
/* LOOKUP */
bool
nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_diropres *resp = rqstp->rq_resp;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_nfs_fh3(xdr, &resp->fh))
return false;
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
return false;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
return false;
}
return true;
}
/* ACCESS */
bool
nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_accessres *resp = rqstp->rq_resp;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
if (xdr_stream_encode_u32(xdr, resp->access) < 0)
return false;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
}
return true;
}
/* READLINK */
bool
nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
struct kvec *head = rqstp->rq_res.head;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
if (xdr_stream_encode_u32(xdr, resp->len) < 0)
return false;
svcxdr_encode_opaque_pages(rqstp, xdr, resp->pages, 0,
resp->len);
if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
return false;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
}
return true;
}
/* READ */
bool
nfs3svc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readres *resp = rqstp->rq_resp;
struct kvec *head = rqstp->rq_res.head;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
return false;
if (xdr_stream_encode_bool(xdr, resp->eof) < 0)
return false;
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
return false;
svcxdr_encode_opaque_pages(rqstp, xdr, resp->pages,
rqstp->rq_res.page_base,
resp->count);
if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
return false;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
}
return true;
}
/* WRITE */
bool
nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_writeres *resp = rqstp->rq_resp;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
return false;
if (xdr_stream_encode_u32(xdr, resp->count) < 0)
return false;
if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
return false;
if (!svcxdr_encode_writeverf3(xdr, resp->verf))
return false;
break;
default:
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
return false;
}
return true;
}
/* CREATE, MKDIR, SYMLINK, MKNOD */
bool
nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_diropres *resp = rqstp->rq_resp;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_fh3(xdr, &resp->fh))
return false;
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
return false;
break;
default:
if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
return false;
}
return true;
}
/* RENAME */
bool
nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_renameres *resp = rqstp->rq_resp;
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
svcxdr_encode_wcc_data(rqstp, xdr, &resp->ffh) &&
svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
}
/* LINK */
bool
nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_linkres *resp = rqstp->rq_resp;
return svcxdr_encode_nfsstat3(xdr, resp->status) &&
svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh) &&
svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
}
/* READDIR */
bool
nfs3svc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readdirres *resp = rqstp->rq_resp;
struct xdr_buf *dirlist = &resp->dirlist;
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return false;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
if (!svcxdr_encode_cookieverf3(xdr, resp->verf))
return false;
svcxdr_encode_opaque_pages(rqstp, xdr, dirlist->pages, 0,
dirlist->len);
/* no more entries */
if (xdr_stream_encode_item_absent(xdr) < 0)
return false;
if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
return false;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
return false;
}
return true;
}
static __be32
compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
const char *name, int namlen, u64 ino)
{
struct svc_export *exp;
struct dentry *dparent, *dchild;
__be32 rv = nfserr_noent;
dparent = cd->fh.fh_dentry;
exp = cd->fh.fh_export;
if (isdotent(name, namlen)) {
if (namlen == 2) {
dchild = dget_parent(dparent);
/*
* Don't return filehandle for ".." if we're at
* the filesystem or export root:
*/
if (dchild == dparent)