Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Userspace interface |
| 3 | * Linux ethernet bridge |
| 4 | * |
| 5 | * Authors: |
| 6 | * Lennert Buytenhek <buytenh@gnu.org> |
| 7 | * |
| 8 | * $Id: br_if.c,v 1.7 2001/12/24 00:59:55 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/kernel.h> |
| 17 | #include <linux/netdevice.h> |
| 18 | #include <linux/ethtool.h> |
| 19 | #include <linux/if_arp.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/rtnetlink.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 23 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <net/sock.h> |
| 25 | |
| 26 | #include "br_private.h" |
| 27 | |
| 28 | /* |
| 29 | * Determine initial path cost based on speed. |
| 30 | * using recommendations from 802.1d standard |
| 31 | * |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 32 | * Since driver might sleep need to not be holding any locks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | */ |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 34 | static int port_cost(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | { |
Stephen Hemminger | b4a488d | 2007-08-30 22:16:22 -0700 | [diff] [blame] | 36 | if (dev->ethtool_ops && dev->ethtool_ops->get_settings) { |
| 37 | struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET, }; |
| 38 | |
| 39 | if (!dev->ethtool_ops->get_settings(dev, &ecmd)) { |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 40 | switch(ecmd.speed) { |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 41 | case SPEED_10000: |
| 42 | return 2; |
Stephen Hemminger | b4a488d | 2007-08-30 22:16:22 -0700 | [diff] [blame] | 43 | case SPEED_1000: |
| 44 | return 4; |
| 45 | case SPEED_100: |
| 46 | return 19; |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 47 | case SPEED_10: |
| 48 | return 100; |
| 49 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | } |
| 51 | } |
| 52 | |
| 53 | /* Old silly heuristics based on name */ |
| 54 | if (!strncmp(dev->name, "lec", 3)) |
| 55 | return 7; |
| 56 | |
| 57 | if (!strncmp(dev->name, "plip", 4)) |
| 58 | return 2500; |
| 59 | |
| 60 | return 100; /* assume old 10Mbps */ |
| 61 | } |
| 62 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 63 | |
| 64 | /* |
| 65 | * Check for port carrier transistions. |
| 66 | * Called from work queue to allow for calling functions that |
| 67 | * might sleep (such as speed check), and to debounce. |
| 68 | */ |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 69 | void br_port_carrier_check(struct net_bridge_port *p) |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 70 | { |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 71 | struct net_device *dev = p->dev; |
| 72 | struct net_bridge *br = p->br; |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 73 | |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 74 | if (netif_carrier_ok(dev)) |
| 75 | p->path_cost = port_cost(dev); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 76 | |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 77 | if (netif_running(br->dev)) { |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 78 | spin_lock_bh(&br->lock); |
| 79 | if (netif_carrier_ok(dev)) { |
| 80 | if (p->state == BR_STATE_DISABLED) |
| 81 | br_stp_enable_port(p); |
| 82 | } else { |
| 83 | if (p->state != BR_STATE_DISABLED) |
| 84 | br_stp_disable_port(p); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 85 | } |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 86 | spin_unlock_bh(&br->lock); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 87 | } |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 88 | } |
| 89 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 90 | static void release_nbp(struct kobject *kobj) |
| 91 | { |
| 92 | struct net_bridge_port *p |
| 93 | = container_of(kobj, struct net_bridge_port, kobj); |
| 94 | kfree(p); |
| 95 | } |
| 96 | |
| 97 | static struct kobj_type brport_ktype = { |
| 98 | #ifdef CONFIG_SYSFS |
| 99 | .sysfs_ops = &brport_sysfs_ops, |
| 100 | #endif |
| 101 | .release = release_nbp, |
| 102 | }; |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | static void destroy_nbp(struct net_bridge_port *p) |
| 105 | { |
| 106 | struct net_device *dev = p->dev; |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | p->br = NULL; |
| 109 | p->dev = NULL; |
| 110 | dev_put(dev); |
| 111 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 112 | kobject_put(&p->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | static void destroy_nbp_rcu(struct rcu_head *head) |
| 116 | { |
| 117 | struct net_bridge_port *p = |
| 118 | container_of(head, struct net_bridge_port, rcu); |
| 119 | destroy_nbp(p); |
| 120 | } |
| 121 | |
Stephen Hemminger | 3f4cfc2 | 2006-01-31 17:44:07 -0800 | [diff] [blame] | 122 | /* Delete port(interface) from bridge is done in two steps. |
| 123 | * via RCU. First step, marks device as down. That deletes |
| 124 | * all the timers and stops new packets from flowing through. |
| 125 | * |
| 126 | * Final cleanup doesn't occur until after all CPU's finished |
| 127 | * processing packets. |
| 128 | * |
| 129 | * Protected from multiple admin operations by RTNL mutex |
| 130 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | static void del_nbp(struct net_bridge_port *p) |
| 132 | { |
| 133 | struct net_bridge *br = p->br; |
| 134 | struct net_device *dev = p->dev; |
| 135 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 136 | sysfs_remove_link(&br->ifobj, dev->name); |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | dev_set_promiscuity(dev, -1); |
| 139 | |
| 140 | spin_lock_bh(&br->lock); |
| 141 | br_stp_disable_port(p); |
| 142 | spin_unlock_bh(&br->lock); |
| 143 | |
Stephen Hemminger | b86c450 | 2007-03-22 14:08:46 -0700 | [diff] [blame] | 144 | br_ifinfo_notify(RTM_DELLINK, p); |
| 145 | |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 146 | br_fdb_delete_by_port(br, p, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | list_del_rcu(&p->list); |
| 149 | |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 150 | rcu_assign_pointer(dev->br_port, NULL); |
| 151 | |
Stephen Hemminger | 125a12c | 2006-03-03 17:16:15 -0800 | [diff] [blame] | 152 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 153 | kobject_del(&p->kobj); |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | call_rcu(&p->rcu, destroy_nbp_rcu); |
| 156 | } |
| 157 | |
| 158 | /* called with RTNL */ |
| 159 | static void del_br(struct net_bridge *br) |
| 160 | { |
| 161 | struct net_bridge_port *p, *n; |
| 162 | |
| 163 | list_for_each_entry_safe(p, n, &br->port_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | del_nbp(p); |
| 165 | } |
| 166 | |
| 167 | del_timer_sync(&br->gc_timer); |
| 168 | |
| 169 | br_sysfs_delbr(br->dev); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 170 | unregister_netdevice(br->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | static struct net_device *new_bridge_dev(const char *name) |
| 174 | { |
| 175 | struct net_bridge *br; |
| 176 | struct net_device *dev; |
| 177 | |
| 178 | dev = alloc_netdev(sizeof(struct net_bridge), name, |
| 179 | br_dev_setup); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | if (!dev) |
| 182 | return NULL; |
| 183 | |
| 184 | br = netdev_priv(dev); |
| 185 | br->dev = dev; |
| 186 | |
| 187 | spin_lock_init(&br->lock); |
| 188 | INIT_LIST_HEAD(&br->port_list); |
| 189 | spin_lock_init(&br->hash_lock); |
| 190 | |
| 191 | br->bridge_id.prio[0] = 0x80; |
| 192 | br->bridge_id.prio[1] = 0x00; |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 193 | |
| 194 | memcpy(br->group_addr, br_group_address, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 196 | br->feature_mask = dev->features; |
Stephen Hemminger | 9cde070 | 2007-03-21 14:22:44 -0700 | [diff] [blame] | 197 | br->stp_enabled = BR_NO_STP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | br->designated_root = br->bridge_id; |
| 199 | br->root_path_cost = 0; |
| 200 | br->root_port = 0; |
| 201 | br->bridge_max_age = br->max_age = 20 * HZ; |
| 202 | br->bridge_hello_time = br->hello_time = 2 * HZ; |
| 203 | br->bridge_forward_delay = br->forward_delay = 15 * HZ; |
| 204 | br->topology_change = 0; |
| 205 | br->topology_change_detected = 0; |
| 206 | br->ageing_time = 300 * HZ; |
| 207 | INIT_LIST_HEAD(&br->age_list); |
| 208 | |
| 209 | br_stp_timer_init(br); |
| 210 | |
| 211 | return dev; |
| 212 | } |
| 213 | |
| 214 | /* find an available port number */ |
| 215 | static int find_portno(struct net_bridge *br) |
| 216 | { |
| 217 | int index; |
| 218 | struct net_bridge_port *p; |
| 219 | unsigned long *inuse; |
| 220 | |
Stephen Hemminger | 3b781fa | 2006-03-20 22:56:50 -0800 | [diff] [blame] | 221 | inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | GFP_KERNEL); |
| 223 | if (!inuse) |
| 224 | return -ENOMEM; |
| 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | set_bit(0, inuse); /* zero is reserved */ |
| 227 | list_for_each_entry(p, &br->port_list, list) { |
| 228 | set_bit(p->port_no, inuse); |
| 229 | } |
| 230 | index = find_first_zero_bit(inuse, BR_MAX_PORTS); |
| 231 | kfree(inuse); |
| 232 | |
| 233 | return (index >= BR_MAX_PORTS) ? -EXFULL : index; |
| 234 | } |
| 235 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 236 | /* called with RTNL but without bridge lock */ |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 237 | static struct net_bridge_port *new_nbp(struct net_bridge *br, |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 238 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
| 240 | int index; |
| 241 | struct net_bridge_port *p; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | index = find_portno(br); |
| 244 | if (index < 0) |
| 245 | return ERR_PTR(index); |
| 246 | |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 247 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (p == NULL) |
| 249 | return ERR_PTR(-ENOMEM); |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | p->br = br; |
| 252 | dev_hold(dev); |
| 253 | p->dev = dev; |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 254 | p->path_cost = port_cost(dev); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 255 | p->priority = 0x8000 >> BR_PORT_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | p->port_no = index; |
| 257 | br_init_port(p); |
| 258 | p->state = BR_STATE_DISABLED; |
Stephen Hemminger | d32439c | 2006-03-03 17:15:34 -0800 | [diff] [blame] | 259 | br_stp_port_timer_init(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
Stephen Hemminger | d32439c | 2006-03-03 17:15:34 -0800 | [diff] [blame] | 261 | kobject_init(&p->kobj); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 262 | kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR); |
| 263 | p->kobj.ktype = &brport_ktype; |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 264 | p->kobj.parent = &(dev->dev.kobj); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 265 | p->kobj.kset = NULL; |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | return p; |
| 268 | } |
| 269 | |
| 270 | int br_add_bridge(const char *name) |
| 271 | { |
| 272 | struct net_device *dev; |
| 273 | int ret; |
| 274 | |
| 275 | dev = new_bridge_dev(name); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 276 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | return -ENOMEM; |
| 278 | |
| 279 | rtnl_lock(); |
| 280 | if (strchr(dev->name, '%')) { |
| 281 | ret = dev_alloc_name(dev, dev->name); |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 282 | if (ret < 0) { |
| 283 | free_netdev(dev); |
| 284 | goto out; |
| 285 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | ret = register_netdevice(dev); |
| 289 | if (ret) |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 290 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | ret = br_sysfs_addbr(dev); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 293 | if (ret) |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 294 | unregister_netdevice(dev); |
| 295 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | rtnl_unlock(); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 297 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | int br_del_bridge(const char *name) |
| 301 | { |
| 302 | struct net_device *dev; |
| 303 | int ret = 0; |
| 304 | |
| 305 | rtnl_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame^] | 306 | dev = __dev_get_by_name(&init_net, name); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 307 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | ret = -ENXIO; /* Could not find device */ |
| 309 | |
| 310 | else if (!(dev->priv_flags & IFF_EBRIDGE)) { |
| 311 | /* Attempt to delete non bridge device! */ |
| 312 | ret = -EPERM; |
| 313 | } |
| 314 | |
| 315 | else if (dev->flags & IFF_UP) { |
| 316 | /* Not shutdown yet. */ |
| 317 | ret = -EBUSY; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 320 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | del_br(netdev_priv(dev)); |
| 322 | |
| 323 | rtnl_unlock(); |
| 324 | return ret; |
| 325 | } |
| 326 | |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 327 | /* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | int br_min_mtu(const struct net_bridge *br) |
| 329 | { |
| 330 | const struct net_bridge_port *p; |
| 331 | int mtu = 0; |
| 332 | |
| 333 | ASSERT_RTNL(); |
| 334 | |
| 335 | if (list_empty(&br->port_list)) |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 336 | mtu = ETH_DATA_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | else { |
| 338 | list_for_each_entry(p, &br->port_list, list) { |
| 339 | if (!mtu || p->dev->mtu < mtu) |
| 340 | mtu = p->dev->mtu; |
| 341 | } |
| 342 | } |
| 343 | return mtu; |
| 344 | } |
| 345 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 346 | /* |
| 347 | * Recomputes features using slave's features |
| 348 | */ |
| 349 | void br_features_recompute(struct net_bridge *br) |
| 350 | { |
| 351 | struct net_bridge_port *p; |
Herbert Xu | 7f353bf | 2007-08-10 15:47:58 -0700 | [diff] [blame] | 352 | unsigned long features; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 353 | |
Herbert Xu | 7f353bf | 2007-08-10 15:47:58 -0700 | [diff] [blame] | 354 | features = br->feature_mask; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 355 | |
| 356 | list_for_each_entry(p, &br->port_list, list) { |
Herbert Xu | 7f353bf | 2007-08-10 15:47:58 -0700 | [diff] [blame] | 357 | features = netdev_compute_features(features, p->dev->features); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 358 | } |
| 359 | |
Herbert Xu | 7f353bf | 2007-08-10 15:47:58 -0700 | [diff] [blame] | 360 | br->dev->features = features; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | /* called with RTNL */ |
| 364 | int br_add_if(struct net_bridge *br, struct net_device *dev) |
| 365 | { |
| 366 | struct net_bridge_port *p; |
| 367 | int err = 0; |
| 368 | |
| 369 | if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER) |
| 370 | return -EINVAL; |
| 371 | |
| 372 | if (dev->hard_start_xmit == br_dev_xmit) |
| 373 | return -ELOOP; |
| 374 | |
| 375 | if (dev->br_port != NULL) |
| 376 | return -EBUSY; |
| 377 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 378 | p = new_nbp(br, dev); |
| 379 | if (IS_ERR(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | return PTR_ERR(p); |
| 381 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 382 | err = kobject_add(&p->kobj); |
| 383 | if (err) |
| 384 | goto err0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 386 | err = br_fdb_insert(br, p, dev->dev_addr); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 387 | if (err) |
| 388 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 390 | err = br_sysfs_addif(p); |
| 391 | if (err) |
| 392 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 394 | rcu_assign_pointer(dev->br_port, p); |
| 395 | dev_set_promiscuity(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 397 | list_add_rcu(&p->list, &br->port_list); |
| 398 | |
| 399 | spin_lock_bh(&br->lock); |
| 400 | br_stp_recalculate_bridge_id(br); |
| 401 | br_features_recompute(br); |
Aji Srinivas | de79059 | 2007-03-07 16:10:53 -0800 | [diff] [blame] | 402 | |
| 403 | if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && |
| 404 | (br->dev->flags & IFF_UP)) |
| 405 | br_stp_enable_port(p); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 406 | spin_unlock_bh(&br->lock); |
| 407 | |
Stephen Hemminger | b86c450 | 2007-03-22 14:08:46 -0700 | [diff] [blame] | 408 | br_ifinfo_notify(RTM_NEWLINK, p); |
| 409 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 410 | dev_set_mtu(br->dev, br_min_mtu(br)); |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 411 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 412 | kobject_uevent(&p->kobj, KOBJ_ADD); |
| 413 | |
| 414 | return 0; |
| 415 | err2: |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 416 | br_fdb_delete_by_port(br, p, 1); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 417 | err1: |
| 418 | kobject_del(&p->kobj); |
| 419 | err0: |
| 420 | kobject_put(&p->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | return err; |
| 422 | } |
| 423 | |
| 424 | /* called with RTNL */ |
| 425 | int br_del_if(struct net_bridge *br, struct net_device *dev) |
| 426 | { |
| 427 | struct net_bridge_port *p = dev->br_port; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 428 | |
| 429 | if (!p || p->br != br) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | return -EINVAL; |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | del_nbp(p); |
| 433 | |
| 434 | spin_lock_bh(&br->lock); |
| 435 | br_stp_recalculate_bridge_id(br); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 436 | br_features_recompute(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | spin_unlock_bh(&br->lock); |
| 438 | |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | void __exit br_cleanup_bridges(void) |
| 443 | { |
| 444 | struct net_device *dev, *nxt; |
| 445 | |
| 446 | rtnl_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame^] | 447 | for_each_netdev_safe(&init_net, dev, nxt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | if (dev->priv_flags & IFF_EBRIDGE) |
| 449 | del_br(dev->priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | rtnl_unlock(); |
| 451 | |
| 452 | } |