1 /* 2 * Generic parts 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 * 8 * $Id: br.c,v 1.47 2001/12/24 00:56:41 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/module.h> 17 #include <linux/kernel.h> 18 #include <linux/netdevice.h> 19 #include <linux/etherdevice.h> 20 #include <linux/init.h> 21 #include <linux/llc.h> 22 #include <net/llc.h> 23 24 #include "br_private.h" 25 26 int (*br_should_route_hook) (struct sk_buff **pskb) = NULL; 27 28 static struct llc_sap *br_stp_sap; 29 30 static int __init br_init(void) 31 { 32 int err; 33 34 br_stp_sap = llc_sap_open(LLC_SAP_BSPAN, br_stp_rcv); 35 if (!br_stp_sap) { 36 printk(KERN_ERR "bridge: can't register sap for STP\n"); 37 return -EADDRINUSE; 38 } 39 40 err = br_fdb_init(); 41 if (err) 42 goto err_out1; 43 44 err = br_netfilter_init(); 45 if (err) 46 goto err_out1; 47 48 err = register_netdevice_notifier(&br_device_notifier); 49 if (err) 50 goto err_out2; 51 52 err = br_netlink_init(); 53 if (err) 54 goto err_out3; 55 56 brioctl_set(br_ioctl_deviceless_stub); 57 br_handle_frame_hook = br_handle_frame; 58 59 br_fdb_get_hook = br_fdb_get; 60 br_fdb_put_hook = br_fdb_put; 61 62 return 0; 63 err_out3: 64 unregister_netdevice_notifier(&br_device_notifier); 65 err_out2: 66 br_netfilter_fini(); 67 err_out1: 68 llc_sap_put(br_stp_sap); 69 return err; 70 } 71 72 static void __exit br_deinit(void) 73 { 74 rcu_assign_pointer(br_stp_sap->rcv_func, NULL); 75 76 br_netlink_fini(); 77 br_netfilter_fini(); 78 unregister_netdevice_notifier(&br_device_notifier); 79 brioctl_set(NULL); 80 81 br_cleanup_bridges(); 82 83 synchronize_net(); 84 85 llc_sap_put(br_stp_sap); 86 br_fdb_get_hook = NULL; 87 br_fdb_put_hook = NULL; 88 89 br_handle_frame_hook = NULL; 90 br_fdb_fini(); 91 } 92 93 EXPORT_SYMBOL(br_should_route_hook); 94 95 module_init(br_init) 96 module_exit(br_deinit) 97 MODULE_LICENSE("GPL"); 98 MODULE_VERSION(BR_VERSION); 99