1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* Device handling code
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*
* $Id: br_device.c,v 1.6 2001/12/24 00:59:55 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/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <asm/uaccess.h>
#include "br_private.h"
static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
return &br->statistics;
}
/* net device transmit always called with no BH (preempt_disabled) */
int 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->statistics.tx_packets++;
br->statistics.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 0;
}
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)
{
if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
return -EINVAL;
dev->mtu = new_mtu;
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);
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 struct ethtool_ops br_ethtool_ops = {
.get_drvinfo = br_getinfo,
.get_link = ethtool_op_get_link,
.get_sg = ethtool_op_get_sg,
.set_sg = br_set_sg,
.get_tx_csum = ethtool_op_get_tx_csum,
.set_tx_csum = br_set_tx_csum,
.get_tso = ethtool_op_get_tso,
.set_tso = br_set_tso,
};
void br_dev_setup(struct net_device *dev)
{
memset(dev->dev_addr, 0, ETH_ALEN);
ether_setup(dev);
dev->do_ioctl = br_dev_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->change_mtu = br_change_mtu;
dev->destructor = free_netdev;
SET_MODULE_OWNER(dev);
SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
dev->stop = br_dev_stop;
dev->tx_queue_len = 0;
dev->set_mac_address = br_set_mac_address;
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;
}
|
