3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
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.
14 #include <linux/kernel.h>
15 #include <linux/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/ethtool.h>
19 #include <asm/uaccess.h>
20 #include "br_private.h"
22 /* net device transmit always called with no BH (preempt_disabled) */
23 int br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
25 struct net_bridge
*br
= netdev_priv(dev
);
26 const unsigned char *dest
= skb
->data
;
27 struct net_bridge_fdb_entry
*dst
;
29 dev
->stats
.tx_packets
++;
30 dev
->stats
.tx_bytes
+= skb
->len
;
32 skb_reset_mac_header(skb
);
33 skb_pull(skb
, ETH_HLEN
);
36 br_flood_deliver(br
, skb
);
37 else if ((dst
= __br_fdb_get(br
, dest
)) != NULL
)
38 br_deliver(dst
->dst
, skb
);
40 br_flood_deliver(br
, skb
);
45 static int br_dev_open(struct net_device
*dev
)
47 struct net_bridge
*br
= netdev_priv(dev
);
49 br_features_recompute(br
);
50 netif_start_queue(dev
);
51 br_stp_enable_bridge(br
);
56 static void br_dev_set_multicast_list(struct net_device
*dev
)
60 static int br_dev_stop(struct net_device
*dev
)
62 br_stp_disable_bridge(netdev_priv(dev
));
64 netif_stop_queue(dev
);
69 static int br_change_mtu(struct net_device
*dev
, int new_mtu
)
71 if (new_mtu
< 68 || new_mtu
> br_min_mtu(netdev_priv(dev
)))
78 /* Allow setting mac address to any valid ethernet address. */
79 static int br_set_mac_address(struct net_device
*dev
, void *p
)
81 struct net_bridge
*br
= netdev_priv(dev
);
82 struct sockaddr
*addr
= p
;
84 if (!is_valid_ether_addr(addr
->sa_data
))
87 spin_lock_bh(&br
->lock
);
88 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
89 br_stp_change_bridge_id(br
, addr
->sa_data
);
90 spin_unlock_bh(&br
->lock
);
95 static void br_getinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
97 strcpy(info
->driver
, "bridge");
98 strcpy(info
->version
, BR_VERSION
);
99 strcpy(info
->fw_version
, "N/A");
100 strcpy(info
->bus_info
, "N/A");
103 static int br_set_sg(struct net_device
*dev
, u32 data
)
105 struct net_bridge
*br
= netdev_priv(dev
);
108 br
->feature_mask
|= NETIF_F_SG
;
110 br
->feature_mask
&= ~NETIF_F_SG
;
112 br_features_recompute(br
);
116 static int br_set_tso(struct net_device
*dev
, u32 data
)
118 struct net_bridge
*br
= netdev_priv(dev
);
121 br
->feature_mask
|= NETIF_F_TSO
;
123 br
->feature_mask
&= ~NETIF_F_TSO
;
125 br_features_recompute(br
);
129 static int br_set_tx_csum(struct net_device
*dev
, u32 data
)
131 struct net_bridge
*br
= netdev_priv(dev
);
134 br
->feature_mask
|= NETIF_F_NO_CSUM
;
136 br
->feature_mask
&= ~NETIF_F_ALL_CSUM
;
138 br_features_recompute(br
);
142 static struct ethtool_ops br_ethtool_ops
= {
143 .get_drvinfo
= br_getinfo
,
144 .get_link
= ethtool_op_get_link
,
146 .set_tx_csum
= br_set_tx_csum
,
147 .set_tso
= br_set_tso
,
150 void br_dev_setup(struct net_device
*dev
)
152 random_ether_addr(dev
->dev_addr
);
155 dev
->do_ioctl
= br_dev_ioctl
;
156 dev
->hard_start_xmit
= br_dev_xmit
;
157 dev
->open
= br_dev_open
;
158 dev
->set_multicast_list
= br_dev_set_multicast_list
;
159 dev
->change_mtu
= br_change_mtu
;
160 dev
->destructor
= free_netdev
;
161 SET_ETHTOOL_OPS(dev
, &br_ethtool_ops
);
162 dev
->stop
= br_dev_stop
;
163 dev
->tx_queue_len
= 0;
164 dev
->set_mac_address
= br_set_mac_address
;
165 dev
->priv_flags
= IFF_EBRIDGE
;
167 dev
->features
= NETIF_F_SG
| NETIF_F_FRAGLIST
| NETIF_F_HIGHDMA
|
168 NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
| NETIF_F_LLTX
;