Add linux libspl support

All changes needed for the libspl layer.  This includes modifications
to files directly copied from OpenSolaris and the addition of new
files needed to fill in the gaps.

Signed-off-by: Brian Behlendorf <[email protected]>

1 files changed, 78 insertions, 0 deletions

diff --git a/lib/libspl/xdr.c b/lib/libspl/xdr.c
new file mode 100644
index 000000000..288a338a1
--- /dev/null
+++ b/lib/libspl/xdr.c
@@ -0,0 +1,78 @@
+/*
+ * 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.
+ */
+
+#include <rpc/xdr.h>
+
+/*
+ * As of glibc-2.5-25 there is not support for xdr_control().  The
+ * xdrmem implementation from OpenSolaris is used here.
+ *
+ * FIXME: Not well tested it may not work as expected.
+ */
+bool_t
+xdr_control(XDR *xdrs, int request, void *info)
+{
+	xdr_bytesrec_t *xptr;
+	int32_t *int32p;
+	int len;
+
+	switch (request) {
+	case XDR_GET_BYTES_AVAIL:
+		xptr = (xdr_bytesrec_t *)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);
+}