net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions
[linux-3.10.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  *      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>
16 #include <linux/etherdevice.h>
17 #include <linux/ethtool.h>
18
19 #include <asm/uaccess.h>
20 #include "br_private.h"
21
22 /* net device transmit always called with no BH (preempt_disabled) */
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
29         dev->stats.tx_packets++;
30         dev->stats.tx_bytes += skb->len;
31
32         skb_reset_mac_header(skb);
33         skb_pull(skb, ETH_HLEN);
34
35         if (dest[0] & 1)
36                 br_flood_deliver(br, skb);
37         else if ((dst = __br_fdb_get(br, dest)) != NULL)
38                 br_deliver(dst->dst, skb);
39         else
40                 br_flood_deliver(br, skb);
41
42         return NETDEV_TX_OK;
43 }
44
45 static int br_dev_open(struct net_device *dev)
46 {
47         struct net_bridge *br = netdev_priv(dev);
48
49         br_features_recompute(br);
50         netif_start_queue(dev);
51         br_stp_enable_bridge(br);
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 {
62         br_stp_disable_bridge(netdev_priv(dev));
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 {
71         struct net_bridge *br = netdev_priv(dev);
72         if (new_mtu < 68 || new_mtu > br_min_mtu(br))
73                 return -EINVAL;
74
75         dev->mtu = new_mtu;
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
82         return 0;
83 }
84
85 /* Allow setting mac address to any valid ethernet address. */
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;
90
91         if (!is_valid_ether_addr(addr->sa_data))
92                 return -EINVAL;
93
94         spin_lock_bh(&br->lock);
95         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
96         br_stp_change_bridge_id(br, addr->sa_data);
97         br->flags |= BR_SET_MAC_ADDR;
98         spin_unlock_bh(&br->lock);
99
100         return 0;
101 }
102
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)
142                 br->feature_mask |= NETIF_F_NO_CSUM;
143         else
144                 br->feature_mask &= ~NETIF_F_ALL_CSUM;
145
146         br_features_recompute(br);
147         return 0;
148 }
149
150 static const struct ethtool_ops br_ethtool_ops = {
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,
161 };
162
163 static const struct net_device_ops br_netdev_ops = {
164         .ndo_open                = br_dev_open,
165         .ndo_stop                = br_dev_stop,
166         .ndo_start_xmit          = br_dev_xmit,
167         .ndo_set_mac_address     = br_set_mac_address,
168         .ndo_set_multicast_list  = br_dev_set_multicast_list,
169         .ndo_change_mtu          = br_change_mtu,
170         .ndo_do_ioctl            = br_dev_ioctl,
171 };
172
173 void br_dev_setup(struct net_device *dev)
174 {
175         random_ether_addr(dev->dev_addr);
176         ether_setup(dev);
177
178         dev->netdev_ops = &br_netdev_ops;
179         dev->destructor = free_netdev;
180         SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
181         dev->tx_queue_len = 0;
182         dev->priv_flags = IFF_EBRIDGE;
183
184         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
185                         NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
186                         NETIF_F_NETNS_LOCAL | NETIF_F_GSO;
187 }