3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
8 * $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/ethtool.h>
21 #include <asm/uaccess.h>
22 #include "br_private.h"
24 static struct net_device_stats
*br_dev_get_stats(struct net_device
*dev
)
26 struct net_bridge
*br
= netdev_priv(dev
);
27 return &br
->statistics
;
30 /* net device transmit always called with no BH (preempt_disabled) */
31 int br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
33 struct net_bridge
*br
= netdev_priv(dev
);
34 const unsigned char *dest
= skb
->data
;
35 struct net_bridge_fdb_entry
*dst
;
37 br
->statistics
.tx_packets
++;
38 br
->statistics
.tx_bytes
+= skb
->len
;
40 skb_reset_mac_header(skb
);
41 skb_pull(skb
, ETH_HLEN
);
44 br_flood_deliver(br
, skb
, 0);
45 else if ((dst
= __br_fdb_get(br
, dest
)) != NULL
)
46 br_deliver(dst
->dst
, skb
);
48 br_flood_deliver(br
, skb
, 0);
53 static int br_dev_open(struct net_device
*dev
)
55 struct net_bridge
*br
= netdev_priv(dev
);
57 br_features_recompute(br
);
58 netif_start_queue(dev
);
59 br_stp_enable_bridge(br
);
64 static void br_dev_set_multicast_list(struct net_device
*dev
)
68 static int br_dev_stop(struct net_device
*dev
)
70 br_stp_disable_bridge(netdev_priv(dev
));
72 netif_stop_queue(dev
);
77 static int br_change_mtu(struct net_device
*dev
, int new_mtu
)
79 if (new_mtu
< 68 || new_mtu
> br_min_mtu(netdev_priv(dev
)))
86 /* Allow setting mac address to any valid ethernet address. */
87 static int br_set_mac_address(struct net_device
*dev
, void *p
)
89 struct net_bridge
*br
= netdev_priv(dev
);
90 struct sockaddr
*addr
= p
;
92 if (!is_valid_ether_addr(addr
->sa_data
))
95 spin_lock_bh(&br
->lock
);
96 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
97 br_stp_change_bridge_id(br
, addr
->sa_data
);
98 spin_unlock_bh(&br
->lock
);
103 static void br_getinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
105 strcpy(info
->driver
, "bridge");
106 strcpy(info
->version
, BR_VERSION
);
107 strcpy(info
->fw_version
, "N/A");
108 strcpy(info
->bus_info
, "N/A");
111 static int br_set_sg(struct net_device
*dev
, u32 data
)
113 struct net_bridge
*br
= netdev_priv(dev
);
116 br
->feature_mask
|= NETIF_F_SG
;
118 br
->feature_mask
&= ~NETIF_F_SG
;
120 br_features_recompute(br
);
124 static int br_set_tso(struct net_device
*dev
, u32 data
)
126 struct net_bridge
*br
= netdev_priv(dev
);
129 br
->feature_mask
|= NETIF_F_TSO
;
131 br
->feature_mask
&= ~NETIF_F_TSO
;
133 br_features_recompute(br
);
137 static int br_set_tx_csum(struct net_device
*dev
, u32 data
)
139 struct net_bridge
*br
= netdev_priv(dev
);
142 br
->feature_mask
|= NETIF_F_NO_CSUM
;
144 br
->feature_mask
&= ~NETIF_F_ALL_CSUM
;
146 br_features_recompute(br
);
150 static struct ethtool_ops br_ethtool_ops
= {
151 .get_drvinfo
= br_getinfo
,
152 .get_link
= ethtool_op_get_link
,
153 .get_sg
= ethtool_op_get_sg
,
155 .get_tx_csum
= ethtool_op_get_tx_csum
,
156 .set_tx_csum
= br_set_tx_csum
,
157 .get_tso
= ethtool_op_get_tso
,
158 .set_tso
= br_set_tso
,
161 void br_dev_setup(struct net_device
*dev
)
163 memset(dev
->dev_addr
, 0, ETH_ALEN
);
167 dev
->do_ioctl
= br_dev_ioctl
;
168 dev
->get_stats
= br_dev_get_stats
;
169 dev
->hard_start_xmit
= br_dev_xmit
;
170 dev
->open
= br_dev_open
;
171 dev
->set_multicast_list
= br_dev_set_multicast_list
;
172 dev
->change_mtu
= br_change_mtu
;
173 dev
->destructor
= free_netdev
;
174 SET_MODULE_OWNER(dev
);
175 SET_ETHTOOL_OPS(dev
, &br_ethtool_ops
);
176 dev
->stop
= br_dev_stop
;
177 dev
->tx_queue_len
= 0;
178 dev
->set_mac_address
= br_set_mac_address
;
179 dev
->priv_flags
= IFF_EBRIDGE
;
181 dev
->features
= NETIF_F_SG
| NETIF_F_FRAGLIST
| NETIF_F_HIGHDMA
|
182 NETIF_F_GSO_SOFTWARE
| NETIF_F_NO_CSUM
|
183 NETIF_F_GSO_ROBUST
| NETIF_F_LLTX
;