1 /* 2 * Generic parts 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/module.h> 15 #include <linux/kernel.h> 16 #include <linux/netdevice.h> 17 #include <linux/etherdevice.h> 18 #include <linux/init.h> 19 #include <linux/llc.h> 20 #include <net/llc.h> 21 #include <net/stp.h> 22 23 #include "br_private.h" 24 25 static void __net_exit br_net_exit(struct net *net) 26 { 27 struct net_device *dev; 28 LIST_HEAD(list); 29 30 rtnl_lock(); 31 for_each_netdev(net, dev) 32 if (dev->priv_flags & IFF_EBRIDGE) 33 br_dev_delete(dev, &list); 34 35 unregister_netdevice_many(&list); 36 rtnl_unlock(); 37 38 } 39 40 static struct pernet_operations br_net_ops = { 41 .exit = br_net_exit, 42 }; 43 44 static const struct stp_proto br_stp_proto = { 45 .rcv = br_stp_rcv, 46 }; 47 48 static int __init br_init(void) 49 { 50 int err; 51 52 err = stp_proto_register(&br_stp_proto); 53 if (err < 0) { 54 pr_err("bridge: can't register sap for STP\n"); 55 return err; 56 } 57 58 err = br_fdb_init(); 59 if (err) 60 goto err_out; 61 62 err = register_pernet_subsys(&br_net_ops); 63 if (err) 64 goto err_out1; 65 66 err = br_netfilter_init(); 67 if (err) 68 goto err_out2; 69 70 err = register_netdevice_notifier(&br_device_notifier); 71 if (err) 72 goto err_out3; 73 74 err = br_netlink_init(); 75 if (err) 76 goto err_out4; 77 78 brioctl_set(br_ioctl_deviceless_stub); 79 80 #if IS_ENABLED(CONFIG_ATM_LANE) 81 br_fdb_test_addr_hook = br_fdb_test_addr; 82 #endif 83 84 return 0; 85 err_out4: 86 unregister_netdevice_notifier(&br_device_notifier); 87 err_out3: 88 br_netfilter_fini(); 89 err_out2: 90 unregister_pernet_subsys(&br_net_ops); 91 err_out1: 92 br_fdb_fini(); 93 err_out: 94 stp_proto_unregister(&br_stp_proto); 95 return err; 96 } 97 98 static void __exit br_deinit(void) 99 { 100 stp_proto_unregister(&br_stp_proto); 101 102 br_netlink_fini(); 103 unregister_netdevice_notifier(&br_device_notifier); 104 brioctl_set(NULL); 105 106 unregister_pernet_subsys(&br_net_ops); 107 108 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 109 110 br_netfilter_fini(); 111 #if IS_ENABLED(CONFIG_ATM_LANE) 112 br_fdb_test_addr_hook = NULL; 113 #endif 114 115 br_fdb_fini(); 116 } 117 118 module_init(br_init) 119 module_exit(br_deinit) 120 MODULE_LICENSE("GPL"); 121 MODULE_VERSION(BR_VERSION); 122 MODULE_ALIAS_RTNL_LINK("bridge"); 123