Commit | Line | Data |
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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) */ |
6fef4c0c | 23 | netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
24 | { |
25 | struct net_bridge *br = netdev_priv(dev); | |
26 | const unsigned char *dest = skb->data; | |
27 | struct net_bridge_fdb_entry *dst; | |
c4fcb78c | 28 | struct net_bridge_mdb_entry *mdst; |
14bb4789 | 29 | struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats); |
1da177e4 | 30 | |
14bb4789 | 31 | brstats->tx_packets++; |
32 | brstats->tx_bytes += skb->len; | |
6088a539 | 33 | |
14bb4789 | 34 | BR_INPUT_SKB_CB(skb)->brdev = dev; |
1da177e4 | 35 | |
459a98ed | 36 | skb_reset_mac_header(skb); |
1da177e4 LT |
37 | skb_pull(skb, ETH_HLEN); |
38 | ||
c4fcb78c HX |
39 | if (dest[0] & 1) { |
40 | if (br_multicast_rcv(br, NULL, skb)) | |
41 | goto out; | |
42 | ||
43 | mdst = br_mdb_get(br, skb); | |
32dec5dd | 44 | if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) |
c4fcb78c HX |
45 | br_multicast_deliver(mdst, skb); |
46 | else | |
47 | br_flood_deliver(br, skb); | |
48 | } else if ((dst = __br_fdb_get(br, dest)) != NULL) | |
1da177e4 LT |
49 | br_deliver(dst->dst, skb); |
50 | else | |
e081e1e3 | 51 | br_flood_deliver(br, skb); |
1da177e4 | 52 | |
c4fcb78c | 53 | out: |
6ed10654 | 54 | return NETDEV_TX_OK; |
1da177e4 LT |
55 | } |
56 | ||
57 | static int br_dev_open(struct net_device *dev) | |
58 | { | |
81d35307 | 59 | struct net_bridge *br = netdev_priv(dev); |
1da177e4 | 60 | |
81d35307 SH |
61 | br_features_recompute(br); |
62 | netif_start_queue(dev); | |
63 | br_stp_enable_bridge(br); | |
3fe2d7c7 | 64 | br_multicast_open(br); |
1da177e4 LT |
65 | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static void br_dev_set_multicast_list(struct net_device *dev) | |
70 | { | |
71 | } | |
72 | ||
73 | static int br_dev_stop(struct net_device *dev) | |
74 | { | |
3fe2d7c7 HX |
75 | struct net_bridge *br = netdev_priv(dev); |
76 | ||
77 | br_stp_disable_bridge(br); | |
78 | br_multicast_stop(br); | |
1da177e4 LT |
79 | |
80 | netif_stop_queue(dev); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
14bb4789 | 85 | static struct net_device_stats *br_get_stats(struct net_device *dev) |
86 | { | |
87 | struct net_bridge *br = netdev_priv(dev); | |
88 | struct net_device_stats *stats = &dev->stats; | |
89 | struct br_cpu_netstats sum = { 0 }; | |
90 | unsigned int cpu; | |
91 | ||
92 | for_each_possible_cpu(cpu) { | |
93 | const struct br_cpu_netstats *bstats | |
94 | = per_cpu_ptr(br->stats, cpu); | |
95 | ||
96 | sum.tx_bytes += bstats->tx_bytes; | |
97 | sum.tx_packets += bstats->tx_packets; | |
98 | sum.rx_bytes += bstats->rx_bytes; | |
99 | sum.rx_packets += bstats->rx_packets; | |
100 | } | |
101 | ||
102 | stats->tx_bytes = sum.tx_bytes; | |
103 | stats->tx_packets = sum.tx_packets; | |
104 | stats->rx_bytes = sum.rx_bytes; | |
105 | stats->rx_packets = sum.rx_packets; | |
106 | ||
107 | return stats; | |
108 | } | |
109 | ||
1da177e4 LT |
110 | static int br_change_mtu(struct net_device *dev, int new_mtu) |
111 | { | |
4adf0af6 SW |
112 | struct net_bridge *br = netdev_priv(dev); |
113 | if (new_mtu < 68 || new_mtu > br_min_mtu(br)) | |
1da177e4 LT |
114 | return -EINVAL; |
115 | ||
116 | dev->mtu = new_mtu; | |
4adf0af6 SW |
117 | |
118 | #ifdef CONFIG_BRIDGE_NETFILTER | |
119 | /* remember the MTU in the rtable for PMTU */ | |
120 | br->fake_rtable.u.dst.metrics[RTAX_MTU - 1] = new_mtu; | |
121 | #endif | |
122 | ||
1da177e4 LT |
123 | return 0; |
124 | } | |
125 | ||
ffe1d49c | 126 | /* Allow setting mac address to any valid ethernet address. */ |
4505a3ef SH |
127 | static int br_set_mac_address(struct net_device *dev, void *p) |
128 | { | |
129 | struct net_bridge *br = netdev_priv(dev); | |
130 | struct sockaddr *addr = p; | |
ffe1d49c SH |
131 | |
132 | if (!is_valid_ether_addr(addr->sa_data)) | |
133 | return -EINVAL; | |
4505a3ef SH |
134 | |
135 | spin_lock_bh(&br->lock); | |
ffe1d49c SH |
136 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); |
137 | br_stp_change_bridge_id(br, addr->sa_data); | |
92c0574f | 138 | br->flags |= BR_SET_MAC_ADDR; |
4505a3ef SH |
139 | spin_unlock_bh(&br->lock); |
140 | ||
ffe1d49c | 141 | return 0; |
4505a3ef SH |
142 | } |
143 | ||
edb5e46f SH |
144 | static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
145 | { | |
146 | strcpy(info->driver, "bridge"); | |
147 | strcpy(info->version, BR_VERSION); | |
148 | strcpy(info->fw_version, "N/A"); | |
149 | strcpy(info->bus_info, "N/A"); | |
150 | } | |
151 | ||
152 | static int br_set_sg(struct net_device *dev, u32 data) | |
153 | { | |
154 | struct net_bridge *br = netdev_priv(dev); | |
155 | ||
156 | if (data) | |
157 | br->feature_mask |= NETIF_F_SG; | |
158 | else | |
159 | br->feature_mask &= ~NETIF_F_SG; | |
160 | ||
161 | br_features_recompute(br); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static int br_set_tso(struct net_device *dev, u32 data) | |
166 | { | |
167 | struct net_bridge *br = netdev_priv(dev); | |
168 | ||
169 | if (data) | |
170 | br->feature_mask |= NETIF_F_TSO; | |
171 | else | |
172 | br->feature_mask &= ~NETIF_F_TSO; | |
173 | ||
174 | br_features_recompute(br); | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static int br_set_tx_csum(struct net_device *dev, u32 data) | |
179 | { | |
180 | struct net_bridge *br = netdev_priv(dev); | |
181 | ||
182 | if (data) | |
2c6cc0d8 | 183 | br->feature_mask |= NETIF_F_NO_CSUM; |
edb5e46f | 184 | else |
2c6cc0d8 | 185 | br->feature_mask &= ~NETIF_F_ALL_CSUM; |
edb5e46f SH |
186 | |
187 | br_features_recompute(br); | |
188 | return 0; | |
189 | } | |
190 | ||
a2dbb882 | 191 | static const struct ethtool_ops br_ethtool_ops = { |
e4119a43 SH |
192 | .get_drvinfo = br_getinfo, |
193 | .get_link = ethtool_op_get_link, | |
194 | .get_tx_csum = ethtool_op_get_tx_csum, | |
195 | .set_tx_csum = br_set_tx_csum, | |
196 | .get_sg = ethtool_op_get_sg, | |
197 | .set_sg = br_set_sg, | |
198 | .get_tso = ethtool_op_get_tso, | |
199 | .set_tso = br_set_tso, | |
200 | .get_ufo = ethtool_op_get_ufo, | |
72dad218 | 201 | .set_ufo = ethtool_op_set_ufo, |
e4119a43 | 202 | .get_flags = ethtool_op_get_flags, |
edb5e46f SH |
203 | }; |
204 | ||
a2dbb882 SH |
205 | static const struct net_device_ops br_netdev_ops = { |
206 | .ndo_open = br_dev_open, | |
207 | .ndo_stop = br_dev_stop, | |
00829823 | 208 | .ndo_start_xmit = br_dev_xmit, |
14bb4789 | 209 | .ndo_get_stats = br_get_stats, |
00829823 SH |
210 | .ndo_set_mac_address = br_set_mac_address, |
211 | .ndo_set_multicast_list = br_dev_set_multicast_list, | |
212 | .ndo_change_mtu = br_change_mtu, | |
213 | .ndo_do_ioctl = br_dev_ioctl, | |
a2dbb882 SH |
214 | }; |
215 | ||
14bb4789 | 216 | static void br_dev_free(struct net_device *dev) |
217 | { | |
218 | struct net_bridge *br = netdev_priv(dev); | |
219 | ||
220 | free_percpu(br->stats); | |
221 | free_netdev(dev); | |
222 | } | |
223 | ||
1da177e4 LT |
224 | void br_dev_setup(struct net_device *dev) |
225 | { | |
3ae41254 | 226 | random_ether_addr(dev->dev_addr); |
1da177e4 LT |
227 | ether_setup(dev); |
228 | ||
a2dbb882 | 229 | dev->netdev_ops = &br_netdev_ops; |
14bb4789 | 230 | dev->destructor = br_dev_free; |
9d6f229f | 231 | SET_ETHTOOL_OPS(dev, &br_ethtool_ops); |
1da177e4 | 232 | dev->tx_queue_len = 0; |
1da177e4 | 233 | dev->priv_flags = IFF_EBRIDGE; |
edb5e46f | 234 | |
9d6f229f | 235 | dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | |
4aa678ba | 236 | NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX | |
b63365a2 | 237 | NETIF_F_NETNS_LOCAL | NETIF_F_GSO; |
1da177e4 | 238 | } |