1 files changed, 974 insertions, 768 deletions

diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index aae514d40b64..3308dd671ef0 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -14,13 +14,26 @@
 #include "netns.h"
 #include "vfs.h"
 
-#define NFSDDBG_FACILITY		NFSDDBG_XDR
+/*
+ * 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 u32	nfs3_ftypes[] = {
+static const u32 nfs3_ftypes[] = {
 	NF3NON,  NF3FIFO, NF3CHR, NF3BAD,
 	NF3DIR,  NF3BAD,  NF3BLK, NF3BAD,
 	NF3REG,  NF3BAD,  NF3LNK, NF3BAD,
@@ -29,810 +42,938 @@ static u32	nfs3_ftypes[] = {
 
 
 /*
- * XDR functions for basic NFS types
+ * Basic NFSv3 data types (RFC 1813 Sections 2.5 and 2.6)
  */
+
 static __be32 *
-encode_time3(__be32 *p, struct timespec64 *time)
+encode_nfstime3(__be32 *p, const struct timespec64 *time)
 {
-	*p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
+	*p++ = cpu_to_be32((u32)time->tv_sec);
+	*p++ = cpu_to_be32(time->tv_nsec);
+
 	return p;
 }
 
-static __be32 *
-decode_time3(__be32 *p, struct timespec64 *time)
+static bool
+svcxdr_decode_nfstime3(struct xdr_stream *xdr, struct timespec64 *timep)
 {
-	time->tv_sec = ntohl(*p++);
-	time->tv_nsec = ntohl(*p++);
-	return p;
+	__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;
 }
 
-static __be32 *
-decode_fh(__be32 *p, struct svc_fh *fhp)
+/**
+ * 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)
 {
-	unsigned int size;
+	__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);
-	size = ntohl(*p++);
-	if (size > NFS3_FHSIZE)
-		return NULL;
-
-	memcpy(&fhp->fh_handle.fh_base, p, size);
 	fhp->fh_handle.fh_size = size;
-	return p + XDR_QUADLEN(size);
+	memcpy(&fhp->fh_handle.fh_raw, p, size);
+
+	return true;
 }
 
-/* Helper function for NFSv3 ACL code */
-__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp)
+/**
+ * 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)
 {
-	return decode_fh(p, fhp);
+	__be32 *p;
+
+	p = xdr_reserve_space(xdr, sizeof(status));
+	if (!p)
+		return false;
+	*p = status;
+
+	return true;
 }
 
-static __be32 *
-encode_fh(__be32 *p, struct svc_fh *fhp)
+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)
 {
-	unsigned int size = fhp->fh_handle.fh_size;
-	*p++ = htonl(size);
-	if (size) p[XDR_QUADLEN(size)-1]=0;
-	memcpy(p, &fhp->fh_handle.fh_base, size);
-	return p + XDR_QUADLEN(size);
+	if (xdr_stream_encode_item_present(xdr) < 0)
+		return false;
+	if (!svcxdr_encode_nfs_fh3(xdr, fhp))
+		return false;
+
+	return true;
 }
 
-/*
- * Decode a file name and make sure that the path contains
- * no slashes or null bytes.
- */
-static __be32 *
-decode_filename(__be32 *p, char **namp, unsigned int *lenp)
+static bool
+svcxdr_encode_cookieverf3(struct xdr_stream *xdr, const __be32 *verf)
 {
-	char		*name;
-	unsigned int	i;
-
-	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
-		for (i = 0, name = *namp; i < *lenp; i++, name++) {
-			if (*name == '\0' || *name == '/')
-				return NULL;
-		}
+	__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 p;
+	return true;
 }
 
-static __be32 *
-decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns)
+static bool
+svcxdr_decode_diropargs3(struct xdr_stream *xdr, struct svc_fh *fhp,
+			 char **name, unsigned int *len)
 {
-	u32	tmp;
+	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 (*p++) {
+	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 = ntohl(*p++);
+		iap->ia_mode = mode;
 	}
-	if (*p++) {
-		iap->ia_uid = make_kuid(userns, ntohl(*p++));
+	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 (*p++) {
-		iap->ia_gid = make_kgid(userns, ntohl(*p++));
+	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 (*p++) {
-		u64	newsize;
+	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;
-		p = xdr_decode_hyper(p, &newsize);
-		iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX);
+		iap->ia_size = newsize;
 	}
-	if ((tmp = ntohl(*p++)) == 1) {	/* set to server time */
+	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;
-	} else if (tmp == 2) {		/* set to client time */
+		break;
+	case SET_TO_CLIENT_TIME:
+		if (!svcxdr_decode_nfstime3(xdr, &iap->ia_atime))
+			return false;
 		iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
-		iap->ia_atime.tv_sec = ntohl(*p++);
-		iap->ia_atime.tv_nsec = ntohl(*p++);
+		break;
+	default:
+		return false;
 	}
-	if ((tmp = ntohl(*p++)) == 1) {	/* set to server time */
+	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;
-	} else if (tmp == 2) {		/* set to client time */
+		break;
+	case SET_TO_CLIENT_TIME:
+		if (!svcxdr_decode_nfstime3(xdr, &iap->ia_mtime))
+			return false;
 		iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
-		iap->ia_mtime.tv_sec = ntohl(*p++);
-		iap->ia_mtime.tv_nsec = ntohl(*p++);
+		break;
+	default:
+		return false;
 	}
-	return p;
+
+	return true;
 }
 
-static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_decode_sattrguard3(struct xdr_stream *xdr, struct nfsd3_sattrargs *args)
 {
-	u64 f;
-	switch(fsid_source(fhp)) {
-	default:
-	case FSIDSOURCE_DEV:
-		p = xdr_encode_hyper(p, (u64)huge_encode_dev
-				     (fhp->fh_dentry->d_sb->s_dev));
-		break;
-	case FSIDSOURCE_FSID:
-		p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
-		break;
-	case FSIDSOURCE_UUID:
-		f = ((u64*)fhp->fh_export->ex_uuid)[0];
-		f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
-		p = xdr_encode_hyper(p, f);
-		break;
-	}
-	return p;
+	__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 __be32 *
-encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
-	      struct kstat *stat)
+static bool
+svcxdr_decode_specdata3(struct xdr_stream *xdr, struct nfsd3_mknodargs *args)
 {
-	struct user_namespace *userns = nfsd_user_namespace(rqstp);
-	*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
-	*p++ = htonl((u32) (stat->mode & S_IALLUGO));
-	*p++ = htonl((u32) stat->nlink);
-	*p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
-	*p++ = htonl((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);
-	}
-	p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
-	*p++ = htonl((u32) MAJOR(stat->rdev));
-	*p++ = htonl((u32) MINOR(stat->rdev));
-	p = encode_fsid(p, fhp);
-	p = xdr_encode_hyper(p, stat->ino);
-	p = encode_time3(p, &stat->atime);
-	p = encode_time3(p, &stat->mtime);
-	p = encode_time3(p, &stat->ctime);
+	__be32 *p;
 
-	return 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 __be32 *
-encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_decode_devicedata3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+			  struct nfsd3_mknodargs *args)
 {
-	/* Attributes to follow */
-	*p++ = xdr_one;
-	return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
+	return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
+		svcxdr_decode_specdata3(xdr, args);
 }
 
-/*
- * Encode post-operation attributes.
- * The inode may be NULL if the call failed because of a stale file
- * handle. In this case, no attributes are returned.
- */
-static __be32 *
-encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_fattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+		     const struct svc_fh *fhp, const struct kstat *stat)
 {
-	struct dentry *dentry = fhp->fh_dentry;
-	if (dentry && d_really_is_positive(dentry)) {
-	        __be32 err;
-		struct kstat stat;
-
-		err = fh_getattr(fhp, &stat);
-		if (!err) {
-			*p++ = xdr_one;		/* attributes follow */
-			lease_get_mtime(d_inode(dentry), &stat.mtime);
-			return encode_fattr3(rqstp, p, fhp, &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_zero;
-	return p;
+	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;
 }
 
-/* Helper for NFSv3 ACLs */
-__be32 *
-nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_wcc_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
 {
-	return encode_post_op_attr(rqstp, p, 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;
 }
 
-/*
- * Enocde weak cache consistency data
- */
-static __be32 *
-encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_pre_op_attr(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) {
-		if (fhp->fh_pre_saved) {
-			*p++ = xdr_one;
-			p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
-			p = encode_time3(p, &fhp->fh_pre_mtime);
-			p = encode_time3(p, &fhp->fh_pre_ctime);
-		} else {
-			*p++ = xdr_zero;
-		}
-		return encode_saved_post_attr(rqstp, p, fhp);
+	if (!fhp->fh_pre_saved) {
+		if (xdr_stream_encode_item_absent(xdr) < 0)
+			return false;
+		return true;
 	}
-	/* no pre- or post-attrs */
-	*p++ = xdr_zero;
-	return encode_post_op_attr(rqstp, p, fhp);
+
+	if (xdr_stream_encode_item_present(xdr) < 0)
+		return false;
+	return svcxdr_encode_wcc_attr(xdr, fhp);
 }
 
-/*
- * Fill in the pre_op attr for the wcc data
+/**
+ * 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
  */
-void fill_pre_wcc(struct svc_fh *fhp)
+bool
+svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+			   const struct svc_fh *fhp)
 {
-	struct inode    *inode;
-	struct kstat	stat;
-	__be32 err;
+	struct dentry *dentry = fhp->fh_dentry;
+	struct kstat stat;
 
-	if (fhp->fh_pre_saved)
-		return;
+	/*
+	 * 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;
 
-	inode = d_inode(fhp->fh_dentry);
-	err = fh_getattr(fhp, &stat);
-	if (err) {
-		/* Grab the times from inode anyway */
-		stat.mtime = inode->i_mtime;
-		stat.ctime = inode->i_ctime;
-		stat.size  = inode->i_size;
-	}
+	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;
 
-	fhp->fh_pre_mtime = stat.mtime;
-	fhp->fh_pre_ctime = stat.ctime;
-	fhp->fh_pre_size  = stat.size;
-	fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
-	fhp->fh_pre_saved = true;
+no_post_op_attrs:
+	return xdr_stream_encode_item_absent(xdr) > 0;
 }
 
 /*
- * Fill in the post_op attr for the wcc data
+ * Encode weak cache consistency data
  */
-void fill_post_wcc(struct svc_fh *fhp)
+static bool
+svcxdr_encode_wcc_data(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+		       const struct svc_fh *fhp)
 {
-	__be32 err;
-
-	if (fhp->fh_post_saved)
-		printk("nfsd: inode locked twice during operation.\n");
-
-	err = fh_getattr(fhp, &fhp->fh_post_attr);
-	fhp->fh_post_change = nfsd4_change_attribute(&fhp->fh_post_attr,
-						     d_inode(fhp->fh_dentry));
-	if (err) {
-		fhp->fh_post_saved = false;
-		/* Grab the ctime anyway - set_change_info might use it */
-		fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime;
-	} else
-		fhp->fh_post_saved = true;
+	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
  */
-int
-nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p)
+
+bool
+nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd_fhandle *args = rqstp->rq_argp;
 
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	return xdr_argsize_check(rqstp, p);
+	return svcxdr_decode_nfs_fh3(xdr, &args->fh);
 }
 
-int
-nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_sattrargs *args = rqstp->rq_argp;
 
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
-	if ((args->check_guard = ntohl(*p++)) != 0) { 
-		struct timespec64 time;
-		p = decode_time3(p, &time);
-		args->guardtime = time.tv_sec;
-	}
-
-	return xdr_argsize_check(rqstp, p);
+	return svcxdr_decode_nfs_fh3(xdr, &args->fh) &&
+		svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
+		svcxdr_decode_sattrguard3(xdr, args);
 }
 
-int
-nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_diropargs *args = rqstp->rq_argp;
 
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_filename(p, &args->name, &args->len)))
-		return 0;
-
-	return xdr_argsize_check(rqstp, p);
+	return svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len);
 }
 
-int
-nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_accessargs *args = rqstp->rq_argp;
 
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	args->access = ntohl(*p++);
+	if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+		return false;
+	if (xdr_stream_decode_u32(xdr, &args->access) < 0)
+		return false;
 
-	return xdr_argsize_check(rqstp, p);
+	return true;
 }
 
-int
-nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_readargs *args = rqstp->rq_argp;
-	unsigned int len;
-	int v;
-	u32 max_blocksize = svc_max_payload(rqstp);
-
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	p = xdr_decode_hyper(p, &args->offset);
-
-	args->count = ntohl(*p++);
-	len = min(args->count, max_blocksize);
 
-	/* set up the kvec */
-	v=0;
-	while (len > 0) {
-		struct page *p = *(rqstp->rq_next_page++);
+	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;
 
-		rqstp->rq_vec[v].iov_base = page_address(p);
-		rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
-		len -= rqstp->rq_vec[v].iov_len;
-		v++;
-	}
-	args->vlen = v;
-	return xdr_argsize_check(rqstp, p);
+	return true;
 }
 
-int
-nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_writeargs *args = rqstp->rq_argp;
-	unsigned int len, hdr, dlen;
 	u32 max_blocksize = svc_max_payload(rqstp);
-	struct kvec *head = rqstp->rq_arg.head;
-	struct kvec *tail = rqstp->rq_arg.tail;
 
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	p = xdr_decode_hyper(p, &args->offset);
-
-	args->count = ntohl(*p++);
-	args->stable = ntohl(*p++);
-	len = args->len = ntohl(*p++);
-	if ((void *)p > head->iov_base + head->iov_len)
-		return 0;
-	/*
-	 * The count must equal the amount of data passed.
-	 */
-	if (args->count != args->len)
-		return 0;
+	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;
 
-	/*
-	 * Check to make sure that we got the right number of
-	 * bytes.
-	 */
-	hdr = (void*)p - head->iov_base;
-	dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr;
-	/*
-	 * Round the length of the data which was specified up to
-	 * the next multiple of XDR units and then compare that
-	 * against the length which was actually received.
-	 * Note that when RPCSEC/GSS (for example) is used, the
-	 * data buffer can be padded so dlen might be larger
-	 * than required.  It must never be smaller.
-	 */
-	if (dlen < XDR_QUADLEN(len)*4)
-		return 0;
+	/* 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;
-		len = args->len = max_blocksize;
+		args->len = max_blocksize;
 	}
 
-	args->first.iov_base = (void *)p;
-	args->first.iov_len = head->iov_len - hdr;
-	return 1;
+	return xdr_stream_subsegment(xdr, &args->payload, args->count);
 }
 
-int
-nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_createargs *args = rqstp->rq_argp;
 
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_filename(p, &args->name, &args->len)))
-		return 0;
-
-	switch (args->createmode = ntohl(*p++)) {
+	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:
-		p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-		break;
+		return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
 	case NFS3_CREATE_EXCLUSIVE:
-		args->verf = p;
-		p += 2;
+		args->verf = xdr_inline_decode(xdr, NFS3_CREATEVERFSIZE);
+		if (!args->verf)
+			return false;
 		break;
 	default:
-		return 0;
+		return false;
 	}
-
-	return xdr_argsize_check(rqstp, p);
+	return true;
 }
 
-int
-nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_createargs *args = rqstp->rq_argp;
 
-	if (!(p = decode_fh(p, &args->fh)) ||
-	    !(p = decode_filename(p, &args->name, &args->len)))
-		return 0;
-	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
-	return xdr_argsize_check(rqstp, p);
+	return svcxdr_decode_diropargs3(xdr, &args->fh,
+					&args->name, &args->len) &&
+		svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
 }
 
-int
-nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_symlinkargs *args = rqstp->rq_argp;
-	char *base = (char *)p;
-	size_t dlen;
-
-	if (!(p = decode_fh(p, &args->ffh)) ||
-	    !(p = decode_filename(p, &args->fname, &args->flen)))
-		return 0;
-	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
-	args->tlen = ntohl(*p++);
-
-	args->first.iov_base = p;
-	args->first.iov_len = rqstp->rq_arg.head[0].iov_len;
-	args->first.iov_len -= (char *)p - base;
+	struct kvec *head = rqstp->rq_arg.head;
 
-	dlen = args->first.iov_len + rqstp->rq_arg.page_len +
-	       rqstp->rq_arg.tail[0].iov_len;
-	if (dlen < XDR_QUADLEN(args->tlen) << 2)
-		return 0;
-	return 1;
+	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;
 }
 
-int
-nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_mknodargs *args = rqstp->rq_argp;
 
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_filename(p, &args->name, &args->len)))
-		return 0;
-
-	args->ftype = ntohl(*p++);
-
-	if (args->ftype == NF3BLK  || args->ftype == NF3CHR
-	 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
-		p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
-	if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
-		args->major = ntohl(*p++);
-		args->minor = ntohl(*p++);
+	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 xdr_argsize_check(rqstp, p);
+	return true;
 }
 
-int
-nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_renameargs *args = rqstp->rq_argp;
 
-	if (!(p = decode_fh(p, &args->ffh))
-	 || !(p = decode_filename(p, &args->fname, &args->flen))
-	 || !(p = decode_fh(p, &args->tfh))
-	 || !(p = decode_filename(p, &args->tname, &args->tlen)))
-		return 0;
-
-	return xdr_argsize_check(rqstp, p);
+	return svcxdr_decode_diropargs3(xdr, &args->ffh,
+					&args->fname, &args->flen) &&
+		svcxdr_decode_diropargs3(xdr, &args->tfh,
+					 &args->tname, &args->tlen);
 }
 
-int
-nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p)
-{
-	struct nfsd3_readlinkargs *args = rqstp->rq_argp;
-
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	args->buffer = page_address(*(rqstp->rq_next_page++));
-
-	return xdr_argsize_check(rqstp, p);
-}
-
-int
-nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_linkargs *args = rqstp->rq_argp;
 
-	if (!(p = decode_fh(p, &args->ffh))
-	 || !(p = decode_fh(p, &args->tfh))
-	 || !(p = decode_filename(p, &args->tname, &args->tlen)))
-		return 0;
-
-	return xdr_argsize_check(rqstp, p);
+	return svcxdr_decode_nfs_fh3(xdr, &args->ffh) &&
+		svcxdr_decode_diropargs3(xdr, &args->tfh,
+					 &args->tname, &args->tlen);
 }
 
-int
-nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_readdirargs *args = rqstp->rq_argp;
-	int len;
-	u32 max_blocksize = svc_max_payload(rqstp);
 
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	p = xdr_decode_hyper(p, &args->cookie);
-	args->verf   = p; p += 2;
-	args->dircount = ~0;
-	args->count  = ntohl(*p++);
-	len = args->count  = min_t(u32, args->count, max_blocksize);
-
-	while (len > 0) {
-		struct page *p = *(rqstp->rq_next_page++);
-		if (!args->buffer)
-			args->buffer = page_address(p);
-		len -= PAGE_SIZE;
-	}
-
-	return xdr_argsize_check(rqstp, p);
+	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;
 }
 
-int
-nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_readdirargs *args = rqstp->rq_argp;
-	int len;
-	u32 max_blocksize = svc_max_payload(rqstp);
-
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	p = xdr_decode_hyper(p, &args->cookie);
-	args->verf     = p; p += 2;
-	args->dircount = ntohl(*p++);
-	args->count    = ntohl(*p++);
-
-	len = args->count = min(args->count, max_blocksize);
-	while (len > 0) {
-		struct page *p = *(rqstp->rq_next_page++);
-		if (!args->buffer)
-			args->buffer = page_address(p);
-		len -= PAGE_SIZE;
-	}
-
-	return xdr_argsize_check(rqstp, p);
+	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;
 }
 
-int
-nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_commitargs *args = rqstp->rq_argp;
-	p = decode_fh(p, &args->fh);
-	if (!p)
-		return 0;
-	p = xdr_decode_hyper(p, &args->offset);
-	args->count = ntohl(*p++);
 
-	return xdr_argsize_check(rqstp, p);
+	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
  */
-/*
- * There must be an encoding function for void results so svc_process
- * will work properly.
- */
-int
-nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
-{
-	return xdr_ressize_check(rqstp, p);
-}
 
 /* GETATTR */
-int
-nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_attrstat *resp = rqstp->rq_resp;
 
-	if (resp->status == 0) {
-		lease_get_mtime(d_inode(resp->fh.fh_dentry),
-				&resp->stat.mtime);
-		p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
+	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 xdr_ressize_check(rqstp, p);
+
+	return true;
 }
 
 /* SETATTR, REMOVE, RMDIR */
-int
-nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_attrstat *resp = rqstp->rq_resp;
 
-	p = encode_wcc_data(rqstp, p, &resp->fh);
-	return xdr_ressize_check(rqstp, p);
+	return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+		svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
 }
 
 /* LOOKUP */
-int
-nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_diropres *resp = rqstp->rq_resp;
 
-	if (resp->status == 0) {
-		p = encode_fh(p, &resp->fh);
-		p = encode_post_op_attr(rqstp, p, &resp->fh);
+	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;
 	}
-	p = encode_post_op_attr(rqstp, p, &resp->dirfh);
-	return xdr_ressize_check(rqstp, p);
+
+	return true;
 }
 
 /* ACCESS */
-int
-nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_accessres *resp = rqstp->rq_resp;
 
-	p = encode_post_op_attr(rqstp, p, &resp->fh);
-	if (resp->status == 0)
-		*p++ = htonl(resp->access);
-	return xdr_ressize_check(rqstp, p);
+	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 */
-int
-nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
+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;
+		xdr_write_pages(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;
+	}
 
-	p = encode_post_op_attr(rqstp, p, &resp->fh);
-	if (resp->status == 0) {
-		*p++ = htonl(resp->len);
-		xdr_ressize_check(rqstp, p);
-		rqstp->rq_res.page_len = resp->len;
-		if (resp->len & 3) {
-			/* need to pad the tail */
-			rqstp->rq_res.tail[0].iov_base = p;
-			*p = 0;
-			rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
-		}
-		return 1;
-	} else
-		return xdr_ressize_check(rqstp, p);
+	return true;
 }
 
 /* READ */
-int
-nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
+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;
+		xdr_write_pages(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;
+	}
 
-	p = encode_post_op_attr(rqstp, p, &resp->fh);
-	if (resp->status == 0) {
-		*p++ = htonl(resp->count);
-		*p++ = htonl(resp->eof);
-		*p++ = htonl(resp->count);	/* xdr opaque count */
-		xdr_ressize_check(rqstp, p);
-		/* now update rqstp->rq_res to reflect data as well */
-		rqstp->rq_res.page_len = resp->count;
-		if (resp->count & 3) {
-			/* need to pad the tail */
-			rqstp->rq_res.tail[0].iov_base = p;
-			*p = 0;
-			rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
-		}
-		return 1;
-	} else
-		return xdr_ressize_check(rqstp, p);
+	return true;
 }
 
 /* WRITE */
-int
-nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_writeres *resp = rqstp->rq_resp;
 
-	p = encode_wcc_data(rqstp, p, &resp->fh);
-	if (resp->status == 0) {
-		*p++ = htonl(resp->count);
-		*p++ = htonl(resp->committed);
-		*p++ = resp->verf[0];
-		*p++ = resp->verf[1];
+	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 xdr_ressize_check(rqstp, p);
+
+	return true;
 }
 
 /* CREATE, MKDIR, SYMLINK, MKNOD */
-int
-nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_diropres *resp = rqstp->rq_resp;
 
-	if (resp->status == 0) {
-		*p++ = xdr_one;
-		p = encode_fh(p, &resp->fh);
-		p = encode_post_op_attr(rqstp, p, &resp->fh);
+	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;
 	}
-	p = encode_wcc_data(rqstp, p, &resp->dirfh);
-	return xdr_ressize_check(rqstp, p);
+
+	return true;
 }
 
 /* RENAME */
-int
-nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_renameres *resp = rqstp->rq_resp;
 
-	p = encode_wcc_data(rqstp, p, &resp->ffh);
-	p = encode_wcc_data(rqstp, p, &resp->tfh);
-	return xdr_ressize_check(rqstp, p);
+	return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+		svcxdr_encode_wcc_data(rqstp, xdr, &resp->ffh) &&
+		svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
 }
 
 /* LINK */
-int
-nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_linkres *resp = rqstp->rq_resp;
 
-	p = encode_post_op_attr(rqstp, p, &resp->fh);
-	p = encode_wcc_data(rqstp, p, &resp->tfh);
-	return xdr_ressize_check(rqstp, p);
+	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 */
-int
-nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
+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;
+		xdr_write_pages(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;
+	}
 
-	p = encode_post_op_attr(rqstp, p, &resp->fh);
-
-	if (resp->status == 0) {
-		/* stupid readdir cookie */
-		memcpy(p, resp->verf, 8); p += 2;
-		xdr_ressize_check(rqstp, p);
-		if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
-			return 1; /*No room for trailer */
-		rqstp->rq_res.page_len = (resp->count) << 2;
-
-		/* add the 'tail' to the end of the 'head' page - page 0. */
-		rqstp->rq_res.tail[0].iov_base = p;
-		*p++ = 0;		/* no more entries */
-		*p++ = htonl(resp->common.err == nfserr_eof);
-		rqstp->rq_res.tail[0].iov_len = 2<<2;
-		return 1;
-	} else
-		return xdr_ressize_check(rqstp, p);
-}
-
-static __be32 *
-encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
-	     int namlen, u64 ino)
-{
-	*p++ = xdr_one;				 /* mark entry present */
-	p    = xdr_encode_hyper(p, ino);	 /* file id */
-	p    = xdr_encode_array(p, name, namlen);/* name length & name */
-
-	cd->offset = p;				/* remember pointer */
-	p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
-
-	return p;
+	return true;
 }
 
 static __be32
@@ -849,9 +990,14 @@ compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
 	if (isdotent(name, namlen)) {
 		if (namlen == 2) {
 			dchild = dget_parent(dparent);
-			/* filesystem root - cannot return filehandle for ".." */
+			/*
+			 * Don't return filehandle for ".." if we're at
+			 * the filesystem or export root:
+			 */
 			if (dchild == dparent)
 				goto out;
+			if (dparent == exp->ex_path.dentry)
+				goto out;
 		} else
 			dchild = dget(dparent);
 	} else
@@ -868,263 +1014,323 @@ out:
 	return rv;
 }
 
-static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino)
-{
-	struct svc_fh	*fh = &cd->scratch;
-	__be32 err;
-
-	fh_init(fh, NFS3_FHSIZE);
-	err = compose_entry_fh(cd, fh, name, namlen, ino);
-	if (err) {
-		*p++ = 0;
-		*p++ = 0;
-		goto out;
-	}
-	p = encode_post_op_attr(cd->rqstp, p, fh);
-	*p++ = xdr_one;			/* yes, a file handle follows */
-	p = encode_fh(p, fh);
-out:
-	fh_put(fh);
-	return p;
-}
-
-/*
- * Encode a directory entry. This one works for both normal readdir
- * and readdirplus.
- * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
- * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
- * 
- * The readdirplus baggage is 1+21 words for post_op_attr, plus the
- * file handle.
+/**
+ * nfs3svc_encode_cookie3 - Encode a directory offset cookie
+ * @resp: readdir result context
+ * @offset: offset cookie to encode
+ *
+ * The buffer space for the offset cookie has already been reserved
+ * by svcxdr_encode_entry3_common().
  */
-
-#define NFS3_ENTRY_BAGGAGE	(2 + 1 + 2 + 1)
-#define NFS3_ENTRYPLUS_BAGGAGE	(1 + 21 + 1 + (NFS3_FHSIZE >> 2))
-static int
-encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
-	     loff_t offset, u64 ino, unsigned int d_type, int plus)
+void nfs3svc_encode_cookie3(struct nfsd3_readdirres *resp, u64 offset)
 {
-	struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
-		       					common);
-	__be32		*p = cd->buffer;
-	caddr_t		curr_page_addr = NULL;
-	struct page **	page;
-	int		slen;		/* string (name) length */
-	int		elen;		/* estimated entry length in words */
-	int		num_entry_words = 0;	/* actual number of words */
-
-	if (cd->offset) {
-		u64 offset64 = offset;
-
-		if (unlikely(cd->offset1)) {
-			/* we ended up with offset on a page boundary */
-			*cd->offset = htonl(offset64 >> 32);
-			*cd->offset1 = htonl(offset64 & 0xffffffff);
-			cd->offset1 = NULL;
-		} else {
-			xdr_encode_hyper(cd->offset, offset64);
-		}
-		cd->offset = NULL;
-	}
-
-	/*
-	dprintk("encode_entry(%.*s @%ld%s)\n",
-		namlen, name, (long) offset, plus? " plus" : "");
-	 */
-
-	/* truncate filename if too long */
-	namlen = min(namlen, NFS3_MAXNAMLEN);
+	__be64 cookie = cpu_to_be64(offset);
 
-	slen = XDR_QUADLEN(namlen);
-	elen = slen + NFS3_ENTRY_BAGGAGE
-		+ (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
+	if (!resp->cookie_offset)
+		return;
+	write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
+			       sizeof(cookie));
+	resp->cookie_offset = 0;
+}
 
-	if (cd->buflen < elen) {
-		cd->common.err = nfserr_toosmall;
-		return -EINVAL;
-	}
+static bool
+svcxdr_encode_entry3_common(struct nfsd3_readdirres *resp, const char *name,
+			    int namlen, loff_t offset, u64 ino)
+{
+	struct xdr_buf *dirlist = &resp->dirlist;
+	struct xdr_stream *xdr = &resp->xdr;
+
+	if (xdr_stream_encode_item_present(xdr) < 0)
+		return false;
+	/* fileid */
+	if (xdr_stream_encode_u64(xdr, ino) < 0)
+		return false;
+	/* name */
+	if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS3_MAXNAMLEN)) < 0)
+		return false;
+	/* cookie */
+	resp->cookie_offset = dirlist->len;
+	if (xdr_stream_encode_u64(xdr, OFFSET_MAX) < 0)
+		return false;
+
+	return true;
+}
 
-	/* determine which page in rq_respages[] we are currently filling */
-	for (page = cd->rqstp->rq_respages + 1;
-				page < cd->rqstp->rq_next_page; page++) {
-		curr_page_addr = page_address(*page);
+/**
+ * nfs3svc_encode_entry3 - encode one NFSv3 READDIR entry
+ * @data: directory context
+ * @name: name of the object to be encoded
+ * @namlen: length of that name, in bytes
+ * @offset: the offset of the previous entry
+ * @ino: the fileid of this entry
+ * @d_type: unused
+ *
+ * Return values:
+ *   %0: Entry was successfully encoded.
+ *   %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
+ *
+ * On exit, the following fields are updated:
+ *   - resp->xdr
+ *   - resp->common.err
+ *   - resp->cookie_offset
+ */
+int nfs3svc_encode_entry3(void *data, const char *name, int namlen,
+			  loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct readdir_cd *ccd = data;
+	struct nfsd3_readdirres *resp = container_of(ccd,
+						     struct nfsd3_readdirres,
+						     common);
+	unsigned int starting_length = resp->dirlist.len;
 
-		if (((caddr_t)cd->buffer >= curr_page_addr) &&
-		    ((caddr_t)cd->buffer <  curr_page_addr + PAGE_SIZE))
-			break;
-	}
+	/* The offset cookie for the previous entry */
+	nfs3svc_encode_cookie3(resp, offset);
 
-	if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
-		/* encode entry in current page */
+	if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
+		goto out_toosmall;
 
-		p = encode_entry_baggage(cd, p, name, namlen, ino);
+	xdr_commit_encode(&resp->xdr);
+	resp->common.err = nfs_ok;
+	return 0;
 
-		if (plus)
-			p = encode_entryplus_baggage(cd, p, name, namlen, ino);
-		num_entry_words = p - cd->buffer;
-	} else if (*(page+1) != NULL) {
-		/* temporarily encode entry into next page, then move back to
-		 * current and next page in rq_respages[] */
-		__be32 *p1, *tmp;
-		int len1, len2;
+out_toosmall:
+	resp->cookie_offset = 0;
+	resp->common.err = nfserr_toosmall;
+	resp->dirlist.len = starting_length;
+	return -EINVAL;
+}
 
-		/* grab next page for temporary storage of entry */
-		p1 = tmp = page_address(*(page+1));
+static bool
+svcxdr_encode_entry3_plus(struct nfsd3_readdirres *resp, const char *name,
+			  int namlen, u64 ino)
+{
+	struct xdr_stream *xdr = &resp->xdr;
+	struct svc_fh *fhp = &resp->scratch;
+	bool result;
 
-		p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
+	result = false;
+	fh_init(fhp, NFS3_FHSIZE);
+	if (compose_entry_fh(resp, fhp, name, namlen, ino) != nfs_ok)
+		goto out_noattrs;
 
-		if (plus)
-			p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino);
+	if (!svcxdr_encode_post_op_attr(resp->rqstp, xdr, fhp))
+		goto out;
+	if (!svcxdr_encode_post_op_fh3(xdr, fhp))
+		goto out;
+	result = true;
 
-		/* determine entry word length and lengths to go in pages */
-		num_entry_words = p1 - tmp;
-		len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
-		if ((num_entry_words << 2) < len1) {
-			/* the actual number of words in the entry is less
-			 * than elen and can still fit in the current page
-			 */
-			memmove(p, tmp, num_entry_words << 2);
-			p += num_entry_words;
-
-			/* update offset */
-			cd->offset = cd->buffer + (cd->offset - tmp);
-		} else {
-			unsigned int offset_r = (cd->offset - tmp) << 2;
-
-			/* update pointer to offset location.
-			 * This is a 64bit quantity, so we need to
-			 * deal with 3 cases:
-			 *  -	entirely in first page
-			 *  -	entirely in second page
-			 *  -	4 bytes in each page
-			 */
-			if (offset_r + 8 <= len1) {
-				cd->offset = p + (cd->offset - tmp);
-			} else if (offset_r >= len1) {
-				cd->offset -= len1 >> 2;
-			} else {
-				/* sitting on the fence */
-				BUG_ON(offset_r != len1 - 4);
-				cd->offset = p + (cd->offset - tmp);
-				cd->offset1 = tmp;
-			}
-
-			len2 = (num_entry_words << 2) - len1;
-
-			/* move from temp page to current and next pages */
-			memmove(p, tmp, len1);
-			memmove(tmp, (caddr_t)tmp+len1, len2);
-
-			p = tmp + (len2 >> 2);
-		}
-	}
-	else {
-		cd->common.err = nfserr_toosmall;
-		return -EINVAL;
-	}
+out:
+	fh_put(fhp);
+	return result;
+
+out_noattrs:
+	if (xdr_stream_encode_item_absent(xdr) < 0)
+		return false;
+	if (xdr_stream_encode_item_absent(xdr) < 0)
+		return false;
+	return true;
+}
 
-	cd->buflen -= num_entry_words;
-	cd->buffer = p;
-	cd->common.err = nfs_ok;
+/**
+ * nfs3svc_encode_entryplus3 - encode one NFSv3 READDIRPLUS entry
+ * @data: directory context
+ * @name: name of the object to be encoded
+ * @namlen: length of that name, in bytes
+ * @offset: the offset of the previous entry
+ * @ino: the fileid of this entry
+ * @d_type: unused
+ *
+ * Return values:
+ *   %0: Entry was successfully encoded.
+ *   %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
+ *
+ * On exit, the following fields are updated:
+ *   - resp->xdr
+ *   - resp->common.err
+ *   - resp->cookie_offset
+ */
+int nfs3svc_encode_entryplus3(void *data, const char *name, int namlen,
+			      loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct readdir_cd *ccd = data;
+	struct nfsd3_readdirres *resp = container_of(ccd,
+						     struct nfsd3_readdirres,
+						     common);
+	unsigned int starting_length = resp->dirlist.len;
+
+	/* The offset cookie for the previous entry */
+	nfs3svc_encode_cookie3(resp, offset);
+
+	if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
+		goto out_toosmall;
+	if (!svcxdr_encode_entry3_plus(resp, name, namlen, ino))
+		goto out_toosmall;
+
+	xdr_commit_encode(&resp->xdr);
+	resp->common.err = nfs_ok;
 	return 0;
 
+out_toosmall:
+	resp->cookie_offset = 0;
+	resp->common.err = nfserr_toosmall;
+	resp->dirlist.len = starting_length;
+	return -EINVAL;
 }
 
-int
-nfs3svc_encode_entry(void *cd, const char *name,
-		     int namlen, loff_t offset, u64 ino, unsigned int d_type)
+static bool
+svcxdr_encode_fsstat3resok(struct xdr_stream *xdr,
+			   const struct nfsd3_fsstatres *resp)
 {
-	return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
-}
+	const struct kstatfs *s = &resp->stats;
+	u64 bs = s->f_bsize;
+	__be32 *p;
 
-int
-nfs3svc_encode_entry_plus(void *cd, const char *name,
-			  int namlen, loff_t offset, u64 ino,
-			  unsigned int d_type)
-{
-	return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
+	p = xdr_reserve_space(xdr, XDR_UNIT * 13);
+	if (!p)
+		return false;
+	p = xdr_encode_hyper(p, bs * s->f_blocks);	/* total bytes */
+	p = xdr_encode_hyper(p, bs * s->f_bfree);	/* free bytes */
+	p = xdr_encode_hyper(p, bs * s->f_bavail);	/* user available bytes */
+	p = xdr_encode_hyper(p, s->f_files);		/* total inodes */
+	p = xdr_encode_hyper(p, s->f_ffree);		/* free inodes */
+	p = xdr_encode_hyper(p, s->f_ffree);		/* user available inodes */
+	*p = cpu_to_be32(resp->invarsec);		/* mean unchanged time */
+
+	return true;
 }
 
 /* FSSTAT */
-int
-nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_fsstatres *resp = rqstp->rq_resp;
-	struct kstatfs	*s = &resp->stats;
-	u64		bs = s->f_bsize;
-
-	*p++ = xdr_zero;	/* no post_op_attr */
-
-	if (resp->status == 0) {
-		p = xdr_encode_hyper(p, bs * s->f_blocks);	/* total bytes */
-		p = xdr_encode_hyper(p, bs * s->f_bfree);	/* free bytes */
-		p = xdr_encode_hyper(p, bs * s->f_bavail);	/* user available bytes */
-		p = xdr_encode_hyper(p, s->f_files);	/* total inodes */
-		p = xdr_encode_hyper(p, s->f_ffree);	/* free inodes */
-		p = xdr_encode_hyper(p, s->f_ffree);	/* user available inodes */
-		*p++ = htonl(resp->invarsec);	/* mean unchanged time */
+
+	if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+		return false;
+	switch (resp->status) {
+	case nfs_ok:
+		if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+			return false;
+		if (!svcxdr_encode_fsstat3resok(xdr, resp))
+			return false;
+		break;
+	default:
+		if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+			return false;
 	}
-	return xdr_ressize_check(rqstp, p);
+
+	return true;
+}
+
+static bool
+svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
+			   const struct nfsd3_fsinfores *resp)
+{
+	__be32 *p;
+
+	p = xdr_reserve_space(xdr, XDR_UNIT * 12);
+	if (!p)
+		return false;
+	*p++ = cpu_to_be32(resp->f_rtmax);
+	*p++ = cpu_to_be32(resp->f_rtpref);
+	*p++ = cpu_to_be32(resp->f_rtmult);
+	*p++ = cpu_to_be32(resp->f_wtmax);
+	*p++ = cpu_to_be32(resp->f_wtpref);
+	*p++ = cpu_to_be32(resp->f_wtmult);
+	*p++ = cpu_to_be32(resp->f_dtpref);
+	p = xdr_encode_hyper(p, resp->f_maxfilesize);
+	p = encode_nfstime3(p, &nfs3svc_time_delta);
+	*p = cpu_to_be32(resp->f_properties);
+
+	return true;
 }
 
 /* FSINFO */
-int
-nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_fsinfores *resp = rqstp->rq_resp;
 
-	*p++ = xdr_zero;	/* no post_op_attr */
-
-	if (resp->status == 0) {
-		*p++ = htonl(resp->f_rtmax);
-		*p++ = htonl(resp->f_rtpref);
-		*p++ = htonl(resp->f_rtmult);
-		*p++ = htonl(resp->f_wtmax);
-		*p++ = htonl(resp->f_wtpref);
-		*p++ = htonl(resp->f_wtmult);
-		*p++ = htonl(resp->f_dtpref);
-		p = xdr_encode_hyper(p, resp->f_maxfilesize);
-		*p++ = xdr_one;
-		*p++ = xdr_zero;
-		*p++ = htonl(resp->f_properties);
+	if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+		return false;
+	switch (resp->status) {
+	case nfs_ok:
+		if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+			return false;
+		if (!svcxdr_encode_fsinfo3resok(xdr, resp))
+			return false;
+		break;
+	default:
+		if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+			return false;
 	}
 
-	return xdr_ressize_check(rqstp, p);
+	return true;
+}
+
+static bool
+svcxdr_encode_pathconf3resok(struct xdr_stream *xdr,
+			     const struct nfsd3_pathconfres *resp)
+{
+	__be32 *p;
+
+	p = xdr_reserve_space(xdr, XDR_UNIT * 6);
+	if (!p)
+		return false;
+	*p++ = cpu_to_be32(resp->p_link_max);
+	*p++ = cpu_to_be32(resp->p_name_max);
+	p = xdr_encode_bool(p, resp->p_no_trunc);
+	p = xdr_encode_bool(p, resp->p_chown_restricted);
+	p = xdr_encode_bool(p, resp->p_case_insensitive);
+	xdr_encode_bool(p, resp->p_case_preserving);
+
+	return true;
 }
 
 /* PATHCONF */
-int
-nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_pathconfres *resp = rqstp->rq_resp;
 
-	*p++ = xdr_zero;	/* no post_op_attr */
-
-	if (resp->status == 0) {
-		*p++ = htonl(resp->p_link_max);
-		*p++ = htonl(resp->p_name_max);
-		*p++ = htonl(resp->p_no_trunc);
-		*p++ = htonl(resp->p_chown_restricted);
-		*p++ = htonl(resp->p_case_insensitive);
-		*p++ = htonl(resp->p_case_preserving);
+	if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+		return false;
+	switch (resp->status) {
+	case nfs_ok:
+		if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+			return false;
+		if (!svcxdr_encode_pathconf3resok(xdr, resp))
+			return false;
+		break;
+	default:
+		if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+			return false;
 	}
 
-	return xdr_ressize_check(rqstp, p);
+	return true;
 }
 
 /* COMMIT */
-int
-nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_commitres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_commitres *resp = rqstp->rq_resp;
 
-	p = encode_wcc_data(rqstp, p, &resp->fh);
-	/* Write verifier */
-	if (resp->status == 0) {
-		*p++ = resp->verf[0];
-		*p++ = resp->verf[1];
+	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 (!svcxdr_encode_writeverf3(xdr, resp->verf))
+			return false;
+		break;
+	default:
+		if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+			return false;
 	}
-	return xdr_ressize_check(rqstp, p);
+
+	return true;
 }
 
 /*