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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 | * | |
1da177e4 LT |
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. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/netdevice.h> | |
4505a3ef | 16 | #include <linux/etherdevice.h> |
edb5e46f | 17 | #include <linux/ethtool.h> |
4505a3ef | 18 | |
1da177e4 LT |
19 | #include <asm/uaccess.h> |
20 | #include "br_private.h" | |
21 | ||
f8ae737d | 22 | /* net device transmit always called with no BH (preempt_disabled) */ |
1da177e4 LT |
23 | int br_dev_xmit(struct sk_buff *skb, struct net_device *dev) |
24 | { | |
25 | struct net_bridge *br = netdev_priv(dev); | |
26 | const unsigned char *dest = skb->data; | |
27 | struct net_bridge_fdb_entry *dst; | |
28 | ||
a339f1c8 PE |
29 | dev->stats.tx_packets++; |
30 | dev->stats.tx_bytes += skb->len; | |
1da177e4 | 31 | |
459a98ed | 32 | skb_reset_mac_header(skb); |
1da177e4 LT |
33 | skb_pull(skb, ETH_HLEN); |
34 | ||
9d6f229f | 35 | if (dest[0] & 1) |
e081e1e3 | 36 | br_flood_deliver(br, skb); |
1da177e4 LT |
37 | else if ((dst = __br_fdb_get(br, dest)) != NULL) |
38 | br_deliver(dst->dst, skb); | |
39 | else | |
e081e1e3 | 40 | br_flood_deliver(br, skb); |
1da177e4 | 41 | |
1da177e4 LT |
42 | return 0; |
43 | } | |
44 | ||
45 | static int br_dev_open(struct net_device *dev) | |
46 | { | |
81d35307 | 47 | struct net_bridge *br = netdev_priv(dev); |
1da177e4 | 48 | |
81d35307 SH |
49 | br_features_recompute(br); |
50 | netif_start_queue(dev); | |
51 | br_stp_enable_bridge(br); | |
1da177e4 LT |
52 | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static void br_dev_set_multicast_list(struct net_device *dev) | |
57 | { | |
58 | } | |
59 | ||
60 | static int br_dev_stop(struct net_device *dev) | |
61 | { | |
81d35307 | 62 | br_stp_disable_bridge(netdev_priv(dev)); |
1da177e4 LT |
63 | |
64 | netif_stop_queue(dev); | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static int br_change_mtu(struct net_device *dev, int new_mtu) | |
70 | { | |
4adf0af6 SW |
71 | struct net_bridge *br = netdev_priv(dev); |
72 | if (new_mtu < 68 || new_mtu > br_min_mtu(br)) | |
1da177e4 LT |
73 | return -EINVAL; |
74 | ||
75 | dev->mtu = new_mtu; | |
4adf0af6 SW |
76 | |
77 | #ifdef CONFIG_BRIDGE_NETFILTER | |
78 | /* remember the MTU in the rtable for PMTU */ | |
79 | br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu; | |
80 | #endif | |
81 | ||
1da177e4 LT |
82 | return 0; |
83 | } | |
84 | ||
ffe1d49c | 85 | /* Allow setting mac address to any valid ethernet address. */ |
4505a3ef SH |
86 | static int br_set_mac_address(struct net_device *dev, void *p) |
87 | { | |
88 | struct net_bridge *br = netdev_priv(dev); | |
89 | struct sockaddr *addr = p; | |
ffe1d49c SH |
90 | |
91 | if (!is_valid_ether_addr(addr->sa_data)) | |
92 | return -EINVAL; | |
4505a3ef SH |
93 | |
94 | spin_lock_bh(&br->lock); | |
ffe1d49c SH |
95 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
96 | br_stp_change_bridge_id(br, addr->sa_data); | |
92c0574f | 97 | br->flags |= BR_SET_MAC_ADDR; |
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 = { | |
e4119a43 SH |
151 | .get_drvinfo = br_getinfo, |
152 | .get_link = ethtool_op_get_link, | |
153 | .get_tx_csum = ethtool_op_get_tx_csum, | |
154 | .set_tx_csum = br_set_tx_csum, | |
155 | .get_sg = ethtool_op_get_sg, | |
156 | .set_sg = br_set_sg, | |
157 | .get_tso = ethtool_op_get_tso, | |
158 | .set_tso = br_set_tso, | |
159 | .get_ufo = ethtool_op_get_ufo, | |
160 | .get_flags = ethtool_op_get_flags, | |
edb5e46f SH |
161 | }; |
162 | ||
1da177e4 LT |
163 | void br_dev_setup(struct net_device *dev) |
164 | { | |
3ae41254 | 165 | random_ether_addr(dev->dev_addr); |
1da177e4 LT |
166 | ether_setup(dev); |
167 | ||
168 | dev->do_ioctl = br_dev_ioctl; | |
1da177e4 LT |
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; | |
9d6f229f | 174 | SET_ETHTOOL_OPS(dev, &br_ethtool_ops); |
1da177e4 LT |
175 | dev->stop = br_dev_stop; |
176 | dev->tx_queue_len = 0; | |
4505a3ef | 177 | dev->set_mac_address = br_set_mac_address; |
1da177e4 | 178 | dev->priv_flags = IFF_EBRIDGE; |
edb5e46f | 179 | |
9d6f229f | 180 | dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | |
7f353bf2 | 181 | NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX; |
1da177e4 | 182 | } |