Index: head/sys/compat/linux/linux.h
===================================================================
--- head/sys/compat/linux/linux.h
+++ head/sys/compat/linux/linux.h
@@ -46,6 +46,26 @@
 #define	LINUX_ARPHRD_ETHER	1
 #define	LINUX_ARPHRD_LOOPBACK	772
 
+/*
+ * net device flags
+ */
+#define	LINUX_IFF_UP		0x0001
+#define	LINUX_IFF_BROADCAST	0x0002
+#define	LINUX_IFF_DEBUG		0x0004
+#define	LINUX_IFF_LOOPBACK	0x0008
+#define	LINUX_IFF_POINTOPOINT	0x0010
+#define	LINUX_IFF_NOTRAILERS	0x0020
+#define	LINUX_IFF_RUNNING	0x0040
+#define	LINUX_IFF_NOARP		0x0080
+#define	LINUX_IFF_PROMISC	0x0100
+#define	LINUX_IFF_ALLMULTI	0x0200
+#define	LINUX_IFF_MASTER	0x0400
+#define	LINUX_IFF_SLAVE		0x0800
+#define	LINUX_IFF_MULTICAST	0x1000
+#define	LINUX_IFF_PORTSEL	0x2000
+#define	LINUX_IFF_AUTOMEDIA	0x4000
+#define	LINUX_IFF_DYNAMIC	0x8000
+
 /* sigaltstack */
 #define	LINUX_SS_ONSTACK	1
 #define	LINUX_SS_DISABLE	2
Index: head/sys/compat/linux/linux.c
===================================================================
--- head/sys/compat/linux/linux.c
+++ head/sys/compat/linux/linux.c
@@ -269,16 +269,30 @@
 void
 linux_ifflags(struct ifnet *ifp, short *flags)
 {
+	unsigned short fl;
 
-	*flags = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
-	/* these flags have no Linux equivalent */
-	*flags &= ~(IFF_DRV_OACTIVE|IFF_SIMPLEX|
-	    IFF_LINK0|IFF_LINK1|IFF_LINK2);
-	/* Linux' multicast flag is in a different bit */
-	if (*flags & IFF_MULTICAST) {
-		*flags &= ~IFF_MULTICAST;
-		*flags |= 0x1000;
-	}
+	fl = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
+	*flags = 0;
+	if (fl & IFF_UP)
+		*flags |= LINUX_IFF_UP;
+	if (fl & IFF_BROADCAST)
+		*flags |= LINUX_IFF_BROADCAST;
+	if (fl & IFF_DEBUG)
+		*flags |= LINUX_IFF_DEBUG;
+	if (fl & IFF_LOOPBACK)
+		*flags |= LINUX_IFF_LOOPBACK;
+	if (fl & IFF_POINTOPOINT)
+		*flags |= LINUX_IFF_POINTOPOINT;
+	if (fl & IFF_DRV_RUNNING)
+		*flags |= LINUX_IFF_RUNNING;
+	if (fl & IFF_NOARP)
+		*flags |= LINUX_IFF_NOARP;
+	if (fl & IFF_PROMISC)
+		*flags |= LINUX_IFF_PROMISC;
+	if (fl & IFF_ALLMULTI)
+		*flags |= LINUX_IFF_ALLMULTI;
+	if (fl & IFF_MULTICAST)
+		*flags |= LINUX_IFF_MULTICAST;
 }
 
 int