[BRIDGE]: limited ethtool support
[linux-2.6.git] / net / bridge / br_device.c
1 /*
2  *      Device handling code
3  *      Linux ethernet bridge
4  *
5  *      Authors:
6  *      Lennert Buytenhek               <buytenh@gnu.org>
7  *
8  *      $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $
9  *
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.
14  */
15
16 #include <linux/kernel.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/ethtool.h>
20
21 #include <asm/uaccess.h>
22 #include "br_private.h"
23
24 static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
25 {
26         struct net_bridge *br = netdev_priv(dev);
27         return &br->statistics;
28 }
29
30 int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
31 {
32         struct net_bridge *br = netdev_priv(dev);
33         const unsigned char *dest = skb->data;
34         struct net_bridge_fdb_entry *dst;
35
36         br->statistics.tx_packets++;
37         br->statistics.tx_bytes += skb->len;
38
39         skb->mac.raw = skb->data;
40         skb_pull(skb, ETH_HLEN);
41
42         rcu_read_lock();
43         if (dest[0] & 1) 
44                 br_flood_deliver(br, skb, 0);
45         else if ((dst = __br_fdb_get(br, dest)) != NULL)
46                 br_deliver(dst->dst, skb);
47         else
48                 br_flood_deliver(br, skb, 0);
49
50         rcu_read_unlock();
51         return 0;
52 }
53
54 static int br_dev_open(struct net_device *dev)
55 {
56         struct net_bridge *br = netdev_priv(dev);
57
58         br_features_recompute(br);
59         netif_start_queue(dev);
60         br_stp_enable_bridge(br);
61
62         return 0;
63 }
64
65 static void br_dev_set_multicast_list(struct net_device *dev)
66 {
67 }
68
69 static int br_dev_stop(struct net_device *dev)
70 {
71         br_stp_disable_bridge(netdev_priv(dev));
72
73         netif_stop_queue(dev);
74
75         return 0;
76 }
77
78 static int br_change_mtu(struct net_device *dev, int new_mtu)
79 {
80         if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
81                 return -EINVAL;
82
83         dev->mtu = new_mtu;
84         return 0;
85 }
86
87 /* Allow setting mac address of pseudo-bridge to be same as
88  * any of the bound interfaces
89  */
90 static int br_set_mac_address(struct net_device *dev, void *p)
91 {
92         struct net_bridge *br = netdev_priv(dev);
93         struct sockaddr *addr = p;
94         struct net_bridge_port *port;
95         int err = -EADDRNOTAVAIL;
96
97         spin_lock_bh(&br->lock);
98         list_for_each_entry(port, &br->port_list, list) {
99                 if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
100                         br_stp_change_bridge_id(br, addr->sa_data);
101                         err = 0;
102                         break;
103                 }
104         }
105         spin_unlock_bh(&br->lock);
106
107         return err;
108 }
109
110 static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
111 {
112         strcpy(info->driver, "bridge");
113         strcpy(info->version, BR_VERSION);
114         strcpy(info->fw_version, "N/A");
115         strcpy(info->bus_info, "N/A");
116 }
117
118 static int br_set_sg(struct net_device *dev, u32 data)
119 {
120         struct net_bridge *br = netdev_priv(dev);
121
122         if (data)
123                 br->feature_mask |= NETIF_F_SG;
124         else
125                 br->feature_mask &= ~NETIF_F_SG;
126
127         br_features_recompute(br);
128         return 0;
129 }
130
131 static int br_set_tso(struct net_device *dev, u32 data)
132 {
133         struct net_bridge *br = netdev_priv(dev);
134
135         if (data)
136                 br->feature_mask |= NETIF_F_TSO;
137         else
138                 br->feature_mask &= ~NETIF_F_TSO;
139
140         br_features_recompute(br);
141         return 0;
142 }
143
144 static int br_set_tx_csum(struct net_device *dev, u32 data)
145 {
146         struct net_bridge *br = netdev_priv(dev);
147
148         if (data)
149                 br->feature_mask |= NETIF_F_IP_CSUM;
150         else
151                 br->feature_mask &= ~NETIF_F_IP_CSUM;
152
153         br_features_recompute(br);
154         return 0;
155 }
156
157 static struct ethtool_ops br_ethtool_ops = {
158         .get_drvinfo = br_getinfo,
159         .get_link = ethtool_op_get_link,
160         .get_sg = ethtool_op_get_sg,
161         .set_sg = br_set_sg,
162         .get_tx_csum = ethtool_op_get_tx_csum,
163         .set_tx_csum = br_set_tx_csum,
164         .get_tso = ethtool_op_get_tso,
165         .set_tso = br_set_tso,
166 };
167
168 void br_dev_setup(struct net_device *dev)
169 {
170         memset(dev->dev_addr, 0, ETH_ALEN);
171
172         ether_setup(dev);
173
174         dev->do_ioctl = br_dev_ioctl;
175         dev->get_stats = br_dev_get_stats;
176         dev->hard_start_xmit = br_dev_xmit;
177         dev->open = br_dev_open;
178         dev->set_multicast_list = br_dev_set_multicast_list;
179         dev->change_mtu = br_change_mtu;
180         dev->destructor = free_netdev;
181         SET_MODULE_OWNER(dev);
182         SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
183         dev->stop = br_dev_stop;
184         dev->tx_queue_len = 0;
185         dev->set_mac_address = br_set_mac_address;
186         dev->priv_flags = IFF_EBRIDGE;
187
188         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST
189                 | NETIF_F_HIGHDMA | NETIF_F_TSO | NETIF_F_IP_CSUM;
190 }