patch-2.3.47 linux/net/bridge/br_device.c

• Lines: 142
• Date: Fri Feb 18 14:51:22 2000
• Orig file: v2.3.46/linux/net/bridge/br_device.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.46/linux/net/bridge/br_device.c linux/net/bridge/br_device.c
@@ -0,0 +1,141 @@
+/*
+ *	Device handling code
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	$Id: br_device.c,v 1.1 2000/02/18 16:47:11 davem Exp $
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <asm/uaccess.h>
+#include "br_private.h"
+
+static int br_dev_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	unsigned long args[4];
+	unsigned long *data;
+
+	if (cmd != SIOCDEVPRIVATE)
+		return -EOPNOTSUPP;
+
+	data = (unsigned long *)rq->ifr_data;
+	if (copy_from_user(args, data, 4*sizeof(unsigned long)))
+		return -EFAULT;
+
+	return br_ioctl(dev->priv, args[0], args[1], args[2], args[3]);
+}
+
+static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
+{
+	struct net_bridge *br;
+
+	br = dev->priv;
+
+	return &br->statistics;
+}
+
+static int __br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct net_bridge *br;
+	unsigned char *dest;
+	struct net_bridge_fdb_entry *dst;
+
+	br = dev->priv;
+	br->statistics.tx_packets++;
+	br->statistics.tx_bytes += skb->len;
+
+	dest = skb->data;
+
+	if (dest[0] & 1) {
+		br_flood(br, skb, 0);
+		return 0;
+	}
+
+	if ((dst = br_fdb_get(br, dest)) != NULL) {
+		br_forward(dst->dst, skb);
+		br_fdb_put(dst);
+		return 0;
+	}
+
+	br_flood(br, skb, 0);
+	return 0;
+}
+
+static int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct net_bridge *br;
+	int ret;
+
+	br = dev->priv;
+	read_lock(&br->lock);
+	ret = __br_dev_xmit(skb, dev);
+	read_unlock(&br->lock);
+
+	return ret;
+}
+
+static int br_dev_open(struct net_device *dev)
+{
+	struct net_bridge *br;
+
+	netif_start_queue(dev);
+
+	br = dev->priv;
+	read_lock(&br->lock);
+	br_stp_enable_bridge(br);
+	read_unlock(&br->lock);
+
+	return 0;
+}
+
+static void br_dev_set_multicast_list(struct net_device *dev)
+{
+}
+
+static int br_dev_stop(struct net_device *dev)
+{
+	struct net_bridge *br;
+
+	br = dev->priv;
+	read_lock(&br->lock);
+	br_stp_disable_bridge(br);
+	read_unlock(&br->lock);
+
+	netif_stop_queue(dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_NET_FASTROUTE
+static int br_dev_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
+{
+	return -1;
+}
+#endif
+
+void br_dev_setup(struct net_device *dev)
+{
+	memset(dev->dev_addr, 0, ETH_ALEN);
+
+	dev->do_ioctl = br_dev_do_ioctl;
+	dev->get_stats = br_dev_get_stats;
+	dev->hard_start_xmit = br_dev_xmit;
+	dev->open = br_dev_open;
+	dev->set_multicast_list = br_dev_set_multicast_list;
+	dev->stop = br_dev_stop;
+#ifdef CONFIG_NET_FASTROUTE
+	dev->accept_fastpath = br_dev_accept_fastpath;
+#endif
+
+	dev->tx_queue_len = 0;
+}