[linux-block.git] / net / bridge / br_device.c

/*
 *	Device handling code
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	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/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>

#include <asm/uaccess.h>
#include "br_private.h"

/* net device transmit always called with no BH (preempt_disabled) */
netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	const unsigned char *dest = skb->data;
	struct net_bridge_fdb_entry *dst;

	BR_INPUT_SKB_CB(skb)->brdev = dev;

	dev->stats.tx_packets++;
	dev->stats.tx_bytes += skb->len;

	skb_reset_mac_header(skb);
	skb_pull(skb, ETH_HLEN);

	if (dest[0] & 1)
		br_flood_deliver(br, skb);
	else if ((dst = __br_fdb_get(br, dest)) != NULL)
		br_deliver(dst->dst, skb);
	else
		br_flood_deliver(br, skb);

	return NETDEV_TX_OK;
}

static int br_dev_open(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	br_features_recompute(br);
	netif_start_queue(dev);
	br_stp_enable_bridge(br);

	return 0;
}

static void br_dev_set_multicast_list(struct net_device *dev)
{
}

static int br_dev_stop(struct net_device *dev)
{
	br_stp_disable_bridge(netdev_priv(dev));

	netif_stop_queue(dev);

	return 0;
}

static int br_change_mtu(struct net_device *dev, int new_mtu)
{
	struct net_bridge *br = netdev_priv(dev);
	if (new_mtu < 68 || new_mtu > br_min_mtu(br))
		return -EINVAL;

	dev->mtu = new_mtu;

#ifdef CONFIG_BRIDGE_NETFILTER
	/* remember the MTU in the rtable for PMTU */
	br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu;
#endif

	return 0;
}

/* Allow setting mac address to any valid ethernet address. */
static int br_set_mac_address(struct net_device *dev, void *p)
{
	struct net_bridge *br = netdev_priv(dev);
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EINVAL;

	spin_lock_bh(&br->lock);
	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
	br_stp_change_bridge_id(br, addr->sa_data);
	br->flags |= BR_SET_MAC_ADDR;
	spin_unlock_bh(&br->lock);

	return 0;
}

static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	strcpy(info->driver, "bridge");
	strcpy(info->version, BR_VERSION);
	strcpy(info->fw_version, "N/A");
	strcpy(info->bus_info, "N/A");
}

static int br_set_sg(struct net_device *dev, u32 data)
{
	struct net_bridge *br = netdev_priv(dev);

	if (data)
		br->feature_mask |= NETIF_F_SG;
	else
		br->feature_mask &= ~NETIF_F_SG;

	br_features_recompute(br);
	return 0;
}

static int br_set_tso(struct net_device *dev, u32 data)
{
	struct net_bridge *br = netdev_priv(dev);

	if (data)
		br->feature_mask |= NETIF_F_TSO;
	else
		br->feature_mask &= ~NETIF_F_TSO;

	br_features_recompute(br);
	return 0;
}

static int br_set_tx_csum(struct net_device *dev, u32 data)
{
	struct net_bridge *br = netdev_priv(dev);

	if (data)
		br->feature_mask |= NETIF_F_NO_CSUM;
	else
		br->feature_mask &= ~NETIF_F_ALL_CSUM;

	br_features_recompute(br);
	return 0;
}

static const struct ethtool_ops br_ethtool_ops = {
	.get_drvinfo    = br_getinfo,
	.get_link	= ethtool_op_get_link,
	.get_tx_csum	= ethtool_op_get_tx_csum,
	.set_tx_csum 	= br_set_tx_csum,
	.get_sg		= ethtool_op_get_sg,
	.set_sg		= br_set_sg,
	.get_tso	= ethtool_op_get_tso,
	.set_tso	= br_set_tso,
	.get_ufo	= ethtool_op_get_ufo,
	.set_ufo	= ethtool_op_set_ufo,
	.get_flags	= ethtool_op_get_flags,
};

static const struct net_device_ops br_netdev_ops = {
	.ndo_open		 = br_dev_open,
	.ndo_stop		 = br_dev_stop,
	.ndo_start_xmit		 = br_dev_xmit,
	.ndo_set_mac_address	 = br_set_mac_address,
	.ndo_set_multicast_list	 = br_dev_set_multicast_list,
	.ndo_change_mtu		 = br_change_mtu,
	.ndo_do_ioctl		 = br_dev_ioctl,
};

void br_dev_setup(struct net_device *dev)
{
	random_ether_addr(dev->dev_addr);
	ether_setup(dev);

	dev->netdev_ops = &br_netdev_ops;
	dev->destructor = free_netdev;
	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
	dev->tx_queue_len = 0;
	dev->priv_flags = IFF_EBRIDGE;

	dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
			NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
			NETIF_F_NETNS_LOCAL | NETIF_F_GSO;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device handling code
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <buytenh@gnu.org>
	7	*
1da177e4 LT	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version
	11	* 2 of the License, or (at your option) any later version.
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/netdevice.h>
4505a3ef	16	#include <linux/etherdevice.h>
edb5e46f	17	#include <linux/ethtool.h>
4505a3ef	18
1da177e4 LT	19	#include <asm/uaccess.h>
	20	#include "br_private.h"
	21
f8ae737d	22	/* net device transmit always called with no BH (preempt_disabled) */
6fef4c0c	23	netdev_tx_t br_dev_xmit(struct sk_buff skb, struct net_device dev)
1da177e4 LT	24	{
	25	struct net_bridge *br = netdev_priv(dev);
	26	const unsigned char *dest = skb->data;
	27	struct net_bridge_fdb_entry *dst;
	28
6088a539 HX	29	BR_INPUT_SKB_CB(skb)->brdev = dev;
6088a539 HX	30
a339f1c8 PE	31	dev->stats.tx_packets++;
a339f1c8 PE	32	dev->stats.tx_bytes += skb->len;
1da177e4	33
459a98ed	34	skb_reset_mac_header(skb);
1da177e4 LT	35	skb_pull(skb, ETH_HLEN);
1da177e4 LT	36
9d6f229f	37	if (dest[0] & 1)
e081e1e3	38	br_flood_deliver(br, skb);
1da177e4 LT	39	else if ((dst = __br_fdb_get(br, dest)) != NULL)
	40	br_deliver(dst->dst, skb);
	41	else
e081e1e3	42	br_flood_deliver(br, skb);
1da177e4	43
6ed10654	44	return NETDEV_TX_OK;
1da177e4 LT	45	}
	46
	47	static int br_dev_open(struct net_device *dev)
	48	{
81d35307	49	struct net_bridge *br = netdev_priv(dev);
1da177e4	50
81d35307 SH	51	br_features_recompute(br);
	52	netif_start_queue(dev);
	53	br_stp_enable_bridge(br);
1da177e4 LT	54
	55	return 0;
	56	}
	57
	58	static void br_dev_set_multicast_list(struct net_device *dev)
	59	{
	60	}
	61
	62	static int br_dev_stop(struct net_device *dev)
	63	{
81d35307	64	br_stp_disable_bridge(netdev_priv(dev));
1da177e4 LT	65
	66	netif_stop_queue(dev);
	67
	68	return 0;
	69	}
	70
	71	static int br_change_mtu(struct net_device *dev, int new_mtu)
	72	{
4adf0af6 SW	73	struct net_bridge *br = netdev_priv(dev);
4adf0af6 SW	74	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(br))
1da177e4 LT	75	return -EINVAL;
	76
	77	dev->mtu = new_mtu;
4adf0af6 SW	78
	79	#ifdef CONFIG_BRIDGE_NETFILTER
	80	/* remember the MTU in the rtable for PMTU */
	81	br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu;
	82	#endif
	83
1da177e4 LT	84	return 0;
	85	}
	86
ffe1d49c	87	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	88	static int br_set_mac_address(struct net_device dev, void p)
	89	{
	90	struct net_bridge *br = netdev_priv(dev);
	91	struct sockaddr *addr = p;
ffe1d49c SH	92
	93	if (!is_valid_ether_addr(addr->sa_data))
	94	return -EINVAL;
4505a3ef SH	95
4505a3ef SH	96	spin_lock_bh(&br->lock);
ffe1d49c SH	97	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
ffe1d49c SH	98	br_stp_change_bridge_id(br, addr->sa_data);
92c0574f	99	br->flags \|= BR_SET_MAC_ADDR;
4505a3ef SH	100	spin_unlock_bh(&br->lock);
4505a3ef SH	101
ffe1d49c	102	return 0;
4505a3ef SH	103	}
4505a3ef SH	104
edb5e46f SH	105	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
	106	{
	107	strcpy(info->driver, "bridge");
	108	strcpy(info->version, BR_VERSION);
	109	strcpy(info->fw_version, "N/A");
	110	strcpy(info->bus_info, "N/A");
	111	}
	112
	113	static int br_set_sg(struct net_device *dev, u32 data)
	114	{
	115	struct net_bridge *br = netdev_priv(dev);
	116
	117	if (data)
	118	br->feature_mask \|= NETIF_F_SG;
	119	else
	120	br->feature_mask &= ~NETIF_F_SG;
	121
	122	br_features_recompute(br);
	123	return 0;
	124	}
	125
	126	static int br_set_tso(struct net_device *dev, u32 data)
	127	{
	128	struct net_bridge *br = netdev_priv(dev);
	129
	130	if (data)
	131	br->feature_mask \|= NETIF_F_TSO;
	132	else
	133	br->feature_mask &= ~NETIF_F_TSO;
	134
	135	br_features_recompute(br);
	136	return 0;
	137	}
	138
	139	static int br_set_tx_csum(struct net_device *dev, u32 data)
	140	{
	141	struct net_bridge *br = netdev_priv(dev);
	142
	143	if (data)
2c6cc0d8	144	br->feature_mask \|= NETIF_F_NO_CSUM;
edb5e46f	145	else
2c6cc0d8	146	br->feature_mask &= ~NETIF_F_ALL_CSUM;
edb5e46f SH	147
	148	br_features_recompute(br);
	149	return 0;
	150	}
	151
a2dbb882	152	static const struct ethtool_ops br_ethtool_ops = {
e4119a43 SH	153	.get_drvinfo = br_getinfo,
	154	.get_link = ethtool_op_get_link,
	155	.get_tx_csum = ethtool_op_get_tx_csum,
	156	.set_tx_csum = br_set_tx_csum,
	157	.get_sg = ethtool_op_get_sg,
	158	.set_sg = br_set_sg,
	159	.get_tso = ethtool_op_get_tso,
	160	.set_tso = br_set_tso,
	161	.get_ufo = ethtool_op_get_ufo,
72dad218	162	.set_ufo = ethtool_op_set_ufo,
e4119a43	163	.get_flags = ethtool_op_get_flags,
edb5e46f SH	164	};
edb5e46f SH	165
a2dbb882 SH	166	static const struct net_device_ops br_netdev_ops = {
	167	.ndo_open = br_dev_open,
	168	.ndo_stop = br_dev_stop,
00829823 SH	169	.ndo_start_xmit = br_dev_xmit,
	170	.ndo_set_mac_address = br_set_mac_address,
	171	.ndo_set_multicast_list = br_dev_set_multicast_list,
	172	.ndo_change_mtu = br_change_mtu,
	173	.ndo_do_ioctl = br_dev_ioctl,
a2dbb882 SH	174	};
a2dbb882 SH	175
1da177e4 LT	176	void br_dev_setup(struct net_device *dev)
1da177e4 LT	177	{
3ae41254	178	random_ether_addr(dev->dev_addr);
1da177e4 LT	179	ether_setup(dev);
1da177e4 LT	180
a2dbb882	181	dev->netdev_ops = &br_netdev_ops;
1da177e4	182	dev->destructor = free_netdev;
9d6f229f	183	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
1da177e4	184	dev->tx_queue_len = 0;
1da177e4	185	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	186
9d6f229f	187	dev->features = NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \|
4aa678ba	188	NETIF_F_GSO_MASK \| NETIF_F_NO_CSUM \| NETIF_F_LLTX \|
b63365a2	189	NETIF_F_NETNS_LOCAL \| NETIF_F_GSO;
1da177e4	190	}