From 1c07d296490117f87dea7f7d491db849635a232a Mon Sep 17 00:00:00 2001
From: pooka <pooka@NetBSD.org>
Date: Fri, 29 May 2015 12:32:23 +0000
Subject: [PATCH] Add a rump kernel component for the tap device.

from Wei Liu <wei.liu2@citrix.com> via private email
---
 sys/rump/net/Makefile.rumpnetcomp       |  4 +-
 sys/rump/net/lib/libtap/Makefile        | 15 ++++++
 sys/rump/net/lib/libtap/tap_component.c | 64 +++++++++++++++++++++++++
 3 files changed, 81 insertions(+), 2 deletions(-)
 create mode 100644 sys/rump/net/lib/libtap/Makefile
 create mode 100644 sys/rump/net/lib/libtap/tap_component.c

diff --git a/sys/rump/net/Makefile.rumpnetcomp b/sys/rump/net/Makefile.rumpnetcomp
index f74a830b71b2..1251062da57a 100644
--- a/sys/rump/net/Makefile.rumpnetcomp
+++ b/sys/rump/net/Makefile.rumpnetcomp
@@ -1,10 +1,10 @@
-#	$NetBSD: Makefile.rumpnetcomp,v 1.10 2013/11/16 14:00:57 rmind Exp $
+#	$NetBSD: Makefile.rumpnetcomp,v 1.11 2015/05/29 12:32:23 pooka Exp $
 #
 
 .include <bsd.own.mk>
 
 RUMPNETCOMP=	agr bridge net net80211 netbt netinet netinet6
-RUMPNETCOMP+=	netmpls npf local shmif
+RUMPNETCOMP+=	netmpls npf local shmif tap
 
 .if ${MKSLJIT} != "no"
 RUMPNETCOMP+=	bpfjit
diff --git a/sys/rump/net/lib/libtap/Makefile b/sys/rump/net/lib/libtap/Makefile
new file mode 100644
index 000000000000..c4754774502e
--- /dev/null
+++ b/sys/rump/net/lib/libtap/Makefile
@@ -0,0 +1,15 @@
+#	$NetBSD: Makefile,v 1.1 2015/05/29 12:32:23 pooka Exp $
+#
+
+.PATH:	${.CURDIR}/../../../../net
+
+LIB=	rumpnet_tap
+
+SRCS=	if_tap.c
+
+SRCS+=	tap_component.c
+
+CPPFLAGS+=	-I${.CURDIR}/../libnet/opt -I${.CURDIR}/../../../librump/rumpvfs
+
+.include <bsd.lib.mk>
+.include <bsd.klinks.mk>
diff --git a/sys/rump/net/lib/libtap/tap_component.c b/sys/rump/net/lib/libtap/tap_component.c
new file mode 100644
index 000000000000..6d9a1f56af3d
--- /dev/null
+++ b/sys/rump/net/lib/libtap/tap_component.c
@@ -0,0 +1,64 @@
+/*	$NetBSD: tap_component.c,v 1.1 2015/05/29 12:32:23 pooka Exp $	*/
+
+/*
+ * Copyright (c) 2015 Wei Liu.  All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: tap_component.c,v 1.1 2015/05/29 12:32:23 pooka Exp $");
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/stat.h>
+
+#include "rump_private.h"
+#include "rump_net_private.h"
+#include "rump_vfs_private.h"
+
+CFDRIVER_DECL(tap, DV_IFNET, NULL);
+
+void tapattach(int);
+
+RUMP_COMPONENT(RUMP_COMPONENT_NET_IF)
+{
+	extern const struct cdevsw tap_cdevsw;
+	devmajor_t bmaj, cmaj;
+	int error;
+
+	config_cfdriver_attach(&tap_cd);
+	tapattach(0);
+
+	bmaj = cmaj = NODEVMAJOR;
+	error = devsw_attach("tap", NULL, &bmaj, &tap_cdevsw, &cmaj);
+	if (error != 0)
+		panic("tap devsw attach failed: %d", error);
+
+	error = rump_vfs_makeonedevnode(S_IFCHR, "/dev/tap", cmaj, 0xfffff);
+	if (error != 0)
+		panic("cannot create tap device node: %d", error);
+
+	error = rump_vfs_makedevnodes(S_IFCHR, "/dev/tap", '0', cmaj, 0, 4);
+	if (error != 0)
+		panic("cannot create tap[0-4] device node: %d", error);
+}