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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* * Device handling code * Linux ethernet bridge * * Authors: * Lennert Buytenhek <buytenh@gnu.org> * * $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $ * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/if_bridge.h> #include <asm/uaccess.h> #include "br_private.h" static int br_dev_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { unsigned long args[4]; unsigned long *data; if (cmd != SIOCDEVPRIVATE) return -EOPNOTSUPP; data = (unsigned long *)rq->ifr_data; if (copy_from_user(args, data, 4*sizeof(unsigned long))) return -EFAULT; return br_ioctl(dev->priv, args[0], args[1], args[2], args[3]); } static struct net_device_stats *br_dev_get_stats(struct net_device *dev) { struct net_bridge *br; br = dev->priv; return &br->statistics; } static int __br_dev_xmit(struct sk_buff *skb, struct net_device *dev) { struct net_bridge *br; unsigned char *dest; struct net_bridge_fdb_entry *dst; br = dev->priv; br->statistics.tx_packets++; br->statistics.tx_bytes += skb->len; dest = skb->mac.raw = skb->data; skb_pull(skb, ETH_HLEN); if (dest[0] & 1) { br_flood_deliver(br, skb, 0); return 0; } if ((dst = br_fdb_get(br, dest)) != NULL) { br_deliver(dst->dst, skb); br_fdb_put(dst); return 0; } br_flood_deliver(br, skb, 0); return 0; } int br_dev_xmit(struct sk_buff *skb, struct net_device *dev) { struct net_bridge *br; int ret; br = dev->priv; read_lock(&br->lock); ret = __br_dev_xmit(skb, dev); read_unlock(&br->lock); return ret; } static int br_dev_open(struct net_device *dev) { struct net_bridge *br; netif_start_queue(dev); br = dev->priv; read_lock(&br->lock); br_stp_enable_bridge(br); read_unlock(&br->lock); return 0; } static void br_dev_set_multicast_list(struct net_device *dev) { } static int br_dev_stop(struct net_device *dev) { struct net_bridge *br; br = dev->priv; read_lock(&br->lock); br_stp_disable_bridge(br); read_unlock(&br->lock); netif_stop_queue(dev); return 0; } static int br_dev_accept_fastpath(struct net_device *dev, struct dst_entry *dst) { return -1; } void br_dev_setup(struct net_device *dev) { memset(dev->dev_addr, 0, ETH_ALEN); dev->do_ioctl = br_dev_do_ioctl; dev->get_stats = br_dev_get_stats; dev->hard_start_xmit = br_dev_xmit; dev->open = br_dev_open; dev->set_multicast_list = br_dev_set_multicast_list; dev->stop = br_dev_stop; dev->accept_fastpath = br_dev_accept_fastpath; dev->tx_queue_len = 0; dev->set_mac_address = NULL; } |