[GitHub/mt8127/android_kernel_alcatel_ttab.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;
	struct net_bridge_mdb_entry *mdst;

	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) {
		if (br_multicast_rcv(br, NULL, skb))
			goto out;

		mdst = br_mdb_get(br, skb);
		if (mdst || BR_INPUT_SKB_CB(skb)->mrouters_only)
			br_multicast_deliver(mdst, skb);
		else
			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);

out:
	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);
	br_multicast_open(br);

	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 = netdev_priv(dev);

	br_stp_disable_bridge(br);
	br_multicast_stop(br);

	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;
c4fcb78c	28	struct net_bridge_mdb_entry *mdst;
1da177e4	29
6088a539 HX	30	BR_INPUT_SKB_CB(skb)->brdev = dev;
6088a539 HX	31
a339f1c8 PE	32	dev->stats.tx_packets++;
a339f1c8 PE	33	dev->stats.tx_bytes += skb->len;
1da177e4	34
459a98ed	35	skb_reset_mac_header(skb);
1da177e4 LT	36	skb_pull(skb, ETH_HLEN);
1da177e4 LT	37
c4fcb78c HX	38	if (dest[0] & 1) {
	39	if (br_multicast_rcv(br, NULL, skb))
	40	goto out;
	41
	42	mdst = br_mdb_get(br, skb);
	43	if (mdst \|\| BR_INPUT_SKB_CB(skb)->mrouters_only)
	44	br_multicast_deliver(mdst, skb);
	45	else
	46	br_flood_deliver(br, skb);
	47	} else if ((dst = __br_fdb_get(br, dest)) != NULL)
1da177e4 LT	48	br_deliver(dst->dst, skb);
1da177e4 LT	49	else
e081e1e3	50	br_flood_deliver(br, skb);
1da177e4	51
c4fcb78c	52	out:
6ed10654	53	return NETDEV_TX_OK;
1da177e4 LT	54	}
	55
	56	static int br_dev_open(struct net_device *dev)
	57	{
81d35307	58	struct net_bridge *br = netdev_priv(dev);
1da177e4	59
81d35307 SH	60	br_features_recompute(br);
	61	netif_start_queue(dev);
	62	br_stp_enable_bridge(br);
3fe2d7c7	63	br_multicast_open(br);
1da177e4 LT	64
	65	return 0;
	66	}
	67
	68	static void br_dev_set_multicast_list(struct net_device *dev)
	69	{
	70	}
	71
	72	static int br_dev_stop(struct net_device *dev)
	73	{
3fe2d7c7 HX	74	struct net_bridge *br = netdev_priv(dev);
	75
	76	br_stp_disable_bridge(br);
	77	br_multicast_stop(br);
1da177e4 LT	78
	79	netif_stop_queue(dev);
	80
	81	return 0;
	82	}
	83
	84	static int br_change_mtu(struct net_device *dev, int new_mtu)
	85	{
4adf0af6 SW	86	struct net_bridge *br = netdev_priv(dev);
4adf0af6 SW	87	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(br))
1da177e4 LT	88	return -EINVAL;
	89
	90	dev->mtu = new_mtu;
4adf0af6 SW	91
	92	#ifdef CONFIG_BRIDGE_NETFILTER
	93	/* remember the MTU in the rtable for PMTU */
	94	br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu;
	95	#endif
	96
1da177e4 LT	97	return 0;
	98	}
	99
ffe1d49c	100	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	101	static int br_set_mac_address(struct net_device dev, void p)
	102	{
	103	struct net_bridge *br = netdev_priv(dev);
	104	struct sockaddr *addr = p;
ffe1d49c SH	105
	106	if (!is_valid_ether_addr(addr->sa_data))
	107	return -EINVAL;
4505a3ef SH	108
4505a3ef SH	109	spin_lock_bh(&br->lock);
ffe1d49c SH	110	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
ffe1d49c SH	111	br_stp_change_bridge_id(br, addr->sa_data);
92c0574f	112	br->flags \|= BR_SET_MAC_ADDR;
4505a3ef SH	113	spin_unlock_bh(&br->lock);
4505a3ef SH	114
ffe1d49c	115	return 0;
4505a3ef SH	116	}
4505a3ef SH	117
edb5e46f SH	118	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
	119	{
	120	strcpy(info->driver, "bridge");
	121	strcpy(info->version, BR_VERSION);
	122	strcpy(info->fw_version, "N/A");
	123	strcpy(info->bus_info, "N/A");
	124	}
	125
	126	static int br_set_sg(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_SG;
	132	else
	133	br->feature_mask &= ~NETIF_F_SG;
	134
	135	br_features_recompute(br);
	136	return 0;
	137	}
	138
	139	static int br_set_tso(struct net_device *dev, u32 data)
	140	{
	141	struct net_bridge *br = netdev_priv(dev);
	142
	143	if (data)
	144	br->feature_mask \|= NETIF_F_TSO;
	145	else
	146	br->feature_mask &= ~NETIF_F_TSO;
	147
	148	br_features_recompute(br);
	149	return 0;
	150	}
	151
	152	static int br_set_tx_csum(struct net_device *dev, u32 data)
	153	{
	154	struct net_bridge *br = netdev_priv(dev);
	155
	156	if (data)
2c6cc0d8	157	br->feature_mask \|= NETIF_F_NO_CSUM;
edb5e46f	158	else
2c6cc0d8	159	br->feature_mask &= ~NETIF_F_ALL_CSUM;
edb5e46f SH	160
	161	br_features_recompute(br);
	162	return 0;
	163	}
	164
a2dbb882	165	static const struct ethtool_ops br_ethtool_ops = {
e4119a43 SH	166	.get_drvinfo = br_getinfo,
	167	.get_link = ethtool_op_get_link,
	168	.get_tx_csum = ethtool_op_get_tx_csum,
	169	.set_tx_csum = br_set_tx_csum,
	170	.get_sg = ethtool_op_get_sg,
	171	.set_sg = br_set_sg,
	172	.get_tso = ethtool_op_get_tso,
	173	.set_tso = br_set_tso,
	174	.get_ufo = ethtool_op_get_ufo,
72dad218	175	.set_ufo = ethtool_op_set_ufo,
e4119a43	176	.get_flags = ethtool_op_get_flags,
edb5e46f SH	177	};
edb5e46f SH	178
a2dbb882 SH	179	static const struct net_device_ops br_netdev_ops = {
	180	.ndo_open = br_dev_open,
	181	.ndo_stop = br_dev_stop,
00829823 SH	182	.ndo_start_xmit = br_dev_xmit,
	183	.ndo_set_mac_address = br_set_mac_address,
	184	.ndo_set_multicast_list = br_dev_set_multicast_list,
	185	.ndo_change_mtu = br_change_mtu,
	186	.ndo_do_ioctl = br_dev_ioctl,
a2dbb882 SH	187	};
a2dbb882 SH	188
1da177e4 LT	189	void br_dev_setup(struct net_device *dev)
1da177e4 LT	190	{
3ae41254	191	random_ether_addr(dev->dev_addr);
1da177e4 LT	192	ether_setup(dev);
1da177e4 LT	193
a2dbb882	194	dev->netdev_ops = &br_netdev_ops;
1da177e4	195	dev->destructor = free_netdev;
9d6f229f	196	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
1da177e4	197	dev->tx_queue_len = 0;
1da177e4	198	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	199
9d6f229f	200	dev->features = NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \|
4aa678ba	201	NETIF_F_GSO_MASK \| NETIF_F_NO_CSUM \| NETIF_F_LLTX \|
b63365a2	202	NETIF_F_NETNS_LOCAL \| NETIF_F_GSO;
1da177e4	203	}