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1da177e4 LT |
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> | |
4505a3ef | 18 | #include <linux/etherdevice.h> |
edb5e46f | 19 | #include <linux/ethtool.h> |
4505a3ef | 20 | |
1da177e4 LT |
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 | { | |
81d35307 | 26 | struct net_bridge *br = netdev_priv(dev); |
1da177e4 LT |
27 | return &br->statistics; |
28 | } | |
29 | ||
f8ae737d | 30 | /* net device transmit always called with no BH (preempt_disabled) */ |
1da177e4 LT |
31 | int br_dev_xmit(struct sk_buff *skb, struct net_device *dev) |
32 | { | |
33 | struct net_bridge *br = netdev_priv(dev); | |
34 | const unsigned char *dest = skb->data; | |
35 | struct net_bridge_fdb_entry *dst; | |
36 | ||
37 | br->statistics.tx_packets++; | |
38 | br->statistics.tx_bytes += skb->len; | |
39 | ||
459a98ed | 40 | skb_reset_mac_header(skb); |
1da177e4 LT |
41 | skb_pull(skb, ETH_HLEN); |
42 | ||
9d6f229f | 43 | if (dest[0] & 1) |
e081e1e3 | 44 | br_flood_deliver(br, skb); |
1da177e4 LT |
45 | else if ((dst = __br_fdb_get(br, dest)) != NULL) |
46 | br_deliver(dst->dst, skb); | |
47 | else | |
e081e1e3 | 48 | br_flood_deliver(br, skb); |
1da177e4 | 49 | |
1da177e4 LT |
50 | return 0; |
51 | } | |
52 | ||
53 | static int br_dev_open(struct net_device *dev) | |
54 | { | |
81d35307 | 55 | struct net_bridge *br = netdev_priv(dev); |
1da177e4 | 56 | |
81d35307 SH |
57 | br_features_recompute(br); |
58 | netif_start_queue(dev); | |
59 | br_stp_enable_bridge(br); | |
1da177e4 LT |
60 | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static void br_dev_set_multicast_list(struct net_device *dev) | |
65 | { | |
66 | } | |
67 | ||
68 | static int br_dev_stop(struct net_device *dev) | |
69 | { | |
81d35307 | 70 | br_stp_disable_bridge(netdev_priv(dev)); |
1da177e4 LT |
71 | |
72 | netif_stop_queue(dev); | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
77 | static int br_change_mtu(struct net_device *dev, int new_mtu) | |
78 | { | |
81d35307 | 79 | if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev))) |
1da177e4 LT |
80 | return -EINVAL; |
81 | ||
82 | dev->mtu = new_mtu; | |
83 | return 0; | |
84 | } | |
85 | ||
ffe1d49c | 86 | /* Allow setting mac address to any valid ethernet address. */ |
4505a3ef SH |
87 | static int br_set_mac_address(struct net_device *dev, void *p) |
88 | { | |
89 | struct net_bridge *br = netdev_priv(dev); | |
90 | struct sockaddr *addr = p; | |
ffe1d49c SH |
91 | |
92 | if (!is_valid_ether_addr(addr->sa_data)) | |
93 | return -EINVAL; | |
4505a3ef SH |
94 | |
95 | spin_lock_bh(&br->lock); | |
ffe1d49c SH |
96 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
97 | br_stp_change_bridge_id(br, addr->sa_data); | |
4505a3ef SH |
98 | spin_unlock_bh(&br->lock); |
99 | ||
ffe1d49c | 100 | return 0; |
4505a3ef SH |
101 | } |
102 | ||
edb5e46f SH |
103 | static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
104 | { | |
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"); | |
109 | } | |
110 | ||
111 | static int br_set_sg(struct net_device *dev, u32 data) | |
112 | { | |
113 | struct net_bridge *br = netdev_priv(dev); | |
114 | ||
115 | if (data) | |
116 | br->feature_mask |= NETIF_F_SG; | |
117 | else | |
118 | br->feature_mask &= ~NETIF_F_SG; | |
119 | ||
120 | br_features_recompute(br); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int br_set_tso(struct net_device *dev, u32 data) | |
125 | { | |
126 | struct net_bridge *br = netdev_priv(dev); | |
127 | ||
128 | if (data) | |
129 | br->feature_mask |= NETIF_F_TSO; | |
130 | else | |
131 | br->feature_mask &= ~NETIF_F_TSO; | |
132 | ||
133 | br_features_recompute(br); | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static int br_set_tx_csum(struct net_device *dev, u32 data) | |
138 | { | |
139 | struct net_bridge *br = netdev_priv(dev); | |
140 | ||
141 | if (data) | |
2c6cc0d8 | 142 | br->feature_mask |= NETIF_F_NO_CSUM; |
edb5e46f | 143 | else |
2c6cc0d8 | 144 | br->feature_mask &= ~NETIF_F_ALL_CSUM; |
edb5e46f SH |
145 | |
146 | br_features_recompute(br); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static struct ethtool_ops br_ethtool_ops = { | |
151 | .get_drvinfo = br_getinfo, | |
152 | .get_link = ethtool_op_get_link, | |
edb5e46f | 153 | .set_sg = br_set_sg, |
edb5e46f | 154 | .set_tx_csum = br_set_tx_csum, |
edb5e46f SH |
155 | .set_tso = br_set_tso, |
156 | }; | |
157 | ||
1da177e4 LT |
158 | void br_dev_setup(struct net_device *dev) |
159 | { | |
3ae41254 | 160 | random_ether_addr(dev->dev_addr); |
1da177e4 LT |
161 | ether_setup(dev); |
162 | ||
163 | dev->do_ioctl = br_dev_ioctl; | |
164 | dev->get_stats = br_dev_get_stats; | |
165 | dev->hard_start_xmit = br_dev_xmit; | |
166 | dev->open = br_dev_open; | |
167 | dev->set_multicast_list = br_dev_set_multicast_list; | |
168 | dev->change_mtu = br_change_mtu; | |
169 | dev->destructor = free_netdev; | |
9d6f229f | 170 | SET_ETHTOOL_OPS(dev, &br_ethtool_ops); |
1da177e4 LT |
171 | dev->stop = br_dev_stop; |
172 | dev->tx_queue_len = 0; | |
4505a3ef | 173 | dev->set_mac_address = br_set_mac_address; |
1da177e4 | 174 | dev->priv_flags = IFF_EBRIDGE; |
edb5e46f | 175 | |
9d6f229f | 176 | dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | |
7f353bf2 | 177 | NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX; |
1da177e4 | 178 | } |