Merge branch 'linux-libspl' into refs/top-bases/linux-zfs-branch

2009-03-11 14:58:34 -07:00 · 2009-03-11 14:58:34 -07:00 · 2ba55e86c5
parent f39adcbb54 db42bfe00a
commit 2ba55e86c5
1 changed files with 118 additions and 0 deletions
--- a/lib/libspl/include/rpc/xdr.h
+++ b/lib/libspl/include/rpc/xdr.h
@ -0,0 +1,118 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+/*
+ * Portions of this source code were derived from Berkeley 4.3 BSD
+ * under license from the Regents of the University of California.
+ */
+
+#ifndef LIBSPL_RPC_XDR_H
+#define LIBSPL_RPC_XDR_H
+
+#include_next <rpc/xdr.h>
+
+/*
+ * Strangely, my glibc version (2.3.6) doesn't have xdr_control(), so
+ * we have to hack it in here (source taken from OpenSolaris).
+ * By the way, it is assumed the xdrmem implementation is used.
+ */
+
+#define xdr_control(a,b,c) xdrmem_control(a,b,c)
+
+/*
+ * These are XDR control operators
+ */
+
+#define	XDR_GET_BYTES_AVAIL 1
+
+struct xdr_bytesrec {
+	bool_t xc_is_last_record;
+	size_t xc_num_avail;
+};
+
+typedef struct xdr_bytesrec xdr_bytesrec;
+
+/*
+ * These are the request arguments to XDR_CONTROL.
+ *
+ * XDR_PEEK - returns the contents of the next XDR unit on the XDR stream.
+ * XDR_SKIPBYTES - skips the next N bytes in the XDR stream.
+ * XDR_RDMAGET - for xdr implementation over RDMA, gets private flags from
+ *		 the XDR stream being moved over RDMA
+ * XDR_RDMANOCHUNK - for xdr implementaion over RDMA, sets private flags in
+ *                   the XDR stream moving over RDMA.
+ */
+#define XDR_PEEK      2
+#define XDR_SKIPBYTES 3
+#define XDR_RDMAGET   4
+#define XDR_RDMASET   5
+
+/* FIXME: probably doesn't work */
+static bool_t
+xdrmem_control(XDR *xdrs, int request, void *info)
+{
+	xdr_bytesrec *xptr;
+	int32_t *int32p;
+	int len;
+
+	switch (request) {
+
+	case XDR_GET_BYTES_AVAIL:
+		xptr = (xdr_bytesrec *)info;
+		xptr->xc_is_last_record = TRUE;
+		xptr->xc_num_avail = xdrs->x_handy;
+		return (TRUE);
+
+	case XDR_PEEK:
+		/*
+		 * Return the next 4 byte unit in the XDR stream.
+		 */
+		if (xdrs->x_handy < sizeof (int32_t))
+			return (FALSE);
+		int32p = (int32_t *)info;
+		*int32p = (int32_t)ntohl((uint32_t)
+		    (*((int32_t *)(xdrs->x_private))));
+		return (TRUE);
+
+	case XDR_SKIPBYTES:
+		/*
+		 * Skip the next N bytes in the XDR stream.
+		 */
+		int32p = (int32_t *)info;
+		len = RNDUP((int)(*int32p));
+		if ((xdrs->x_handy -= len) < 0)
+			return (FALSE);
+		xdrs->x_private += len;
+		return (TRUE);
+
+	}
+	return (FALSE);
+}
+
+#endif