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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
WANG Cong | c06ee96 | 2010-05-06 00:48:24 -0700 | [diff] [blame] | 16 | #include <linux/netpoll.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/ethtool.h> |
| 18 | #include <linux/if_arp.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/rtnetlink.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 22 | #include <linux/if_ether.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.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 | |
Stephen Hemminger | 944c794 | 2010-08-24 13:08:10 +0000 | [diff] [blame^] | 64 | /* Check for port carrier transistions. */ |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 65 | void br_port_carrier_check(struct net_bridge_port *p) |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 66 | { |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 67 | struct net_device *dev = p->dev; |
| 68 | struct net_bridge *br = p->br; |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 69 | |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 70 | if (netif_carrier_ok(dev)) |
| 71 | p->path_cost = port_cost(dev); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 72 | |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 73 | if (netif_running(br->dev)) { |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 74 | spin_lock_bh(&br->lock); |
| 75 | if (netif_carrier_ok(dev)) { |
| 76 | if (p->state == BR_STATE_DISABLED) |
| 77 | br_stp_enable_port(p); |
| 78 | } else { |
| 79 | if (p->state != BR_STATE_DISABLED) |
| 80 | br_stp_disable_port(p); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 81 | } |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 82 | spin_unlock_bh(&br->lock); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 83 | } |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 84 | } |
| 85 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 86 | static void release_nbp(struct kobject *kobj) |
| 87 | { |
| 88 | struct net_bridge_port *p |
| 89 | = container_of(kobj, struct net_bridge_port, kobj); |
| 90 | kfree(p); |
| 91 | } |
| 92 | |
| 93 | static struct kobj_type brport_ktype = { |
| 94 | #ifdef CONFIG_SYSFS |
| 95 | .sysfs_ops = &brport_sysfs_ops, |
| 96 | #endif |
| 97 | .release = release_nbp, |
| 98 | }; |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | static void destroy_nbp(struct net_bridge_port *p) |
| 101 | { |
| 102 | struct net_device *dev = p->dev; |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | p->br = NULL; |
| 105 | p->dev = NULL; |
| 106 | dev_put(dev); |
| 107 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 108 | kobject_put(&p->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | static void destroy_nbp_rcu(struct rcu_head *head) |
| 112 | { |
| 113 | struct net_bridge_port *p = |
| 114 | container_of(head, struct net_bridge_port, rcu); |
| 115 | destroy_nbp(p); |
| 116 | } |
| 117 | |
Stephen Hemminger | 3f4cfc2 | 2006-01-31 17:44:07 -0800 | [diff] [blame] | 118 | /* Delete port(interface) from bridge is done in two steps. |
| 119 | * via RCU. First step, marks device as down. That deletes |
| 120 | * all the timers and stops new packets from flowing through. |
| 121 | * |
| 122 | * Final cleanup doesn't occur until after all CPU's finished |
| 123 | * processing packets. |
| 124 | * |
| 125 | * Protected from multiple admin operations by RTNL mutex |
| 126 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | static void del_nbp(struct net_bridge_port *p) |
| 128 | { |
| 129 | struct net_bridge *br = p->br; |
| 130 | struct net_device *dev = p->dev; |
| 131 | |
Randy Dunlap | b3bcb72 | 2010-05-18 12:26:27 -0700 | [diff] [blame] | 132 | sysfs_remove_link(br->ifobj, p->dev->name); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | dev_set_promiscuity(dev, -1); |
| 135 | |
| 136 | spin_lock_bh(&br->lock); |
| 137 | br_stp_disable_port(p); |
| 138 | spin_unlock_bh(&br->lock); |
| 139 | |
Stephen Hemminger | b86c450 | 2007-03-22 14:08:46 -0700 | [diff] [blame] | 140 | br_ifinfo_notify(RTM_DELLINK, p); |
| 141 | |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 142 | br_fdb_delete_by_port(br, p, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 144 | list_del_rcu(&p->list); |
| 145 | |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 146 | dev->priv_flags &= ~IFF_BRIDGE_PORT; |
| 147 | |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 148 | netdev_rx_handler_unregister(dev); |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 149 | |
Herbert Xu | 3fe2d7c | 2010-02-28 00:49:38 -0800 | [diff] [blame] | 150 | br_multicast_del_port(p); |
| 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 | |
Herbert Xu | 91d2c34 | 2010-06-10 16:12:50 +0000 | [diff] [blame] | 155 | br_netpoll_disable(p); |
| 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | call_rcu(&p->rcu, destroy_nbp_rcu); |
| 158 | } |
| 159 | |
| 160 | /* called with RTNL */ |
Eric Dumazet | 8c56ba0 | 2009-10-28 05:35:35 +0000 | [diff] [blame] | 161 | static void del_br(struct net_bridge *br, struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
| 163 | struct net_bridge_port *p, *n; |
| 164 | |
| 165 | list_for_each_entry_safe(p, n, &br->port_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | del_nbp(p); |
| 167 | } |
| 168 | |
| 169 | del_timer_sync(&br->gc_timer); |
| 170 | |
| 171 | br_sysfs_delbr(br->dev); |
Eric Dumazet | 8c56ba0 | 2009-10-28 05:35:35 +0000 | [diff] [blame] | 172 | unregister_netdevice_queue(br->dev, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
| 174 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 175 | static struct net_device *new_bridge_dev(struct net *net, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
| 177 | struct net_bridge *br; |
| 178 | struct net_device *dev; |
| 179 | |
| 180 | dev = alloc_netdev(sizeof(struct net_bridge), name, |
| 181 | br_dev_setup); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | if (!dev) |
| 184 | return NULL; |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 185 | dev_net_set(dev, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | br = netdev_priv(dev); |
| 188 | br->dev = dev; |
| 189 | |
stephen hemminger | 14bb478 | 2010-03-02 13:32:09 +0000 | [diff] [blame] | 190 | br->stats = alloc_percpu(struct br_cpu_netstats); |
| 191 | if (!br->stats) { |
| 192 | free_netdev(dev); |
| 193 | return NULL; |
| 194 | } |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | spin_lock_init(&br->lock); |
| 197 | INIT_LIST_HEAD(&br->port_list); |
| 198 | spin_lock_init(&br->hash_lock); |
| 199 | |
| 200 | br->bridge_id.prio[0] = 0x80; |
| 201 | br->bridge_id.prio[1] = 0x00; |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 202 | |
| 203 | memcpy(br->group_addr, br_group_address, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 205 | br->feature_mask = dev->features; |
Stephen Hemminger | 9cde070 | 2007-03-21 14:22:44 -0700 | [diff] [blame] | 206 | br->stp_enabled = BR_NO_STP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | br->designated_root = br->bridge_id; |
| 208 | br->root_path_cost = 0; |
| 209 | br->root_port = 0; |
| 210 | br->bridge_max_age = br->max_age = 20 * HZ; |
| 211 | br->bridge_hello_time = br->hello_time = 2 * HZ; |
| 212 | br->bridge_forward_delay = br->forward_delay = 15 * HZ; |
| 213 | br->topology_change = 0; |
| 214 | br->topology_change_detected = 0; |
| 215 | br->ageing_time = 300 * HZ; |
Simon Wunderlich | 4adf0af | 2008-07-30 16:27:55 -0700 | [diff] [blame] | 216 | |
| 217 | br_netfilter_rtable_init(br); |
| 218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | br_stp_timer_init(br); |
Herbert Xu | 3fe2d7c | 2010-02-28 00:49:38 -0800 | [diff] [blame] | 220 | br_multicast_init(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | return dev; |
| 223 | } |
| 224 | |
| 225 | /* find an available port number */ |
| 226 | static int find_portno(struct net_bridge *br) |
| 227 | { |
| 228 | int index; |
| 229 | struct net_bridge_port *p; |
| 230 | unsigned long *inuse; |
| 231 | |
Stephen Hemminger | 3b781fa | 2006-03-20 22:56:50 -0800 | [diff] [blame] | 232 | inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | GFP_KERNEL); |
| 234 | if (!inuse) |
| 235 | return -ENOMEM; |
| 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | set_bit(0, inuse); /* zero is reserved */ |
| 238 | list_for_each_entry(p, &br->port_list, list) { |
| 239 | set_bit(p->port_no, inuse); |
| 240 | } |
| 241 | index = find_first_zero_bit(inuse, BR_MAX_PORTS); |
| 242 | kfree(inuse); |
| 243 | |
| 244 | return (index >= BR_MAX_PORTS) ? -EXFULL : index; |
| 245 | } |
| 246 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 247 | /* called with RTNL but without bridge lock */ |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 248 | static struct net_bridge_port *new_nbp(struct net_bridge *br, |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 249 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
| 251 | int index; |
| 252 | struct net_bridge_port *p; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | index = find_portno(br); |
| 255 | if (index < 0) |
| 256 | return ERR_PTR(index); |
| 257 | |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 258 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (p == NULL) |
| 260 | return ERR_PTR(-ENOMEM); |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | p->br = br; |
| 263 | dev_hold(dev); |
| 264 | p->dev = dev; |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 265 | p->path_cost = port_cost(dev); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 266 | p->priority = 0x8000 >> BR_PORT_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | p->port_no = index; |
Fischer, Anna | 3982d3d | 2009-08-13 06:55:16 +0000 | [diff] [blame] | 268 | p->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | br_init_port(p); |
| 270 | p->state = BR_STATE_DISABLED; |
Stephen Hemminger | d32439c | 2006-03-03 17:15:34 -0800 | [diff] [blame] | 271 | br_stp_port_timer_init(p); |
Herbert Xu | 3fe2d7c | 2010-02-28 00:49:38 -0800 | [diff] [blame] | 272 | br_multicast_add_port(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | return p; |
| 275 | } |
| 276 | |
Marcel Holtmann | 384912e | 2009-08-31 21:08:19 +0000 | [diff] [blame] | 277 | static struct device_type br_type = { |
| 278 | .name = "bridge", |
| 279 | }; |
| 280 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 281 | int br_add_bridge(struct net *net, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | { |
| 283 | struct net_device *dev; |
| 284 | int ret; |
| 285 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 286 | dev = new_bridge_dev(net, name); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 287 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return -ENOMEM; |
| 289 | |
| 290 | rtnl_lock(); |
| 291 | if (strchr(dev->name, '%')) { |
| 292 | ret = dev_alloc_name(dev, dev->name); |
Pavel Emelyanov | e340a90 | 2008-05-04 17:58:07 -0700 | [diff] [blame] | 293 | if (ret < 0) |
| 294 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
| 296 | |
Marcel Holtmann | 384912e | 2009-08-31 21:08:19 +0000 | [diff] [blame] | 297 | SET_NETDEV_DEVTYPE(dev, &br_type); |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | ret = register_netdevice(dev); |
Pavel Emelyanov | e340a90 | 2008-05-04 17:58:07 -0700 | [diff] [blame] | 300 | if (ret) |
| 301 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | ret = br_sysfs_addbr(dev); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 304 | if (ret) |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 305 | unregister_netdevice(dev); |
| 306 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | rtnl_unlock(); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 308 | return ret; |
Pavel Emelyanov | e340a90 | 2008-05-04 17:58:07 -0700 | [diff] [blame] | 309 | |
| 310 | out_free: |
| 311 | free_netdev(dev); |
| 312 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } |
| 314 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 315 | int br_del_bridge(struct net *net, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | { |
| 317 | struct net_device *dev; |
| 318 | int ret = 0; |
| 319 | |
| 320 | rtnl_lock(); |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 321 | dev = __dev_get_by_name(net, name); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 322 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | ret = -ENXIO; /* Could not find device */ |
| 324 | |
| 325 | else if (!(dev->priv_flags & IFF_EBRIDGE)) { |
| 326 | /* Attempt to delete non bridge device! */ |
| 327 | ret = -EPERM; |
| 328 | } |
| 329 | |
| 330 | else if (dev->flags & IFF_UP) { |
| 331 | /* Not shutdown yet. */ |
| 332 | ret = -EBUSY; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 333 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 335 | else |
Eric Dumazet | 8c56ba0 | 2009-10-28 05:35:35 +0000 | [diff] [blame] | 336 | del_br(netdev_priv(dev), NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | rtnl_unlock(); |
| 339 | return ret; |
| 340 | } |
| 341 | |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 342 | /* 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] | 343 | int br_min_mtu(const struct net_bridge *br) |
| 344 | { |
| 345 | const struct net_bridge_port *p; |
| 346 | int mtu = 0; |
| 347 | |
| 348 | ASSERT_RTNL(); |
| 349 | |
| 350 | if (list_empty(&br->port_list)) |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 351 | mtu = ETH_DATA_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | else { |
| 353 | list_for_each_entry(p, &br->port_list, list) { |
| 354 | if (!mtu || p->dev->mtu < mtu) |
| 355 | mtu = p->dev->mtu; |
| 356 | } |
| 357 | } |
| 358 | return mtu; |
| 359 | } |
| 360 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 361 | /* |
| 362 | * Recomputes features using slave's features |
| 363 | */ |
| 364 | void br_features_recompute(struct net_bridge *br) |
| 365 | { |
| 366 | struct net_bridge_port *p; |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 367 | unsigned long features, mask; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 368 | |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 369 | features = mask = br->feature_mask; |
| 370 | if (list_empty(&br->port_list)) |
| 371 | goto done; |
| 372 | |
| 373 | features &= ~NETIF_F_ONE_FOR_ALL; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 374 | |
| 375 | list_for_each_entry(p, &br->port_list, list) { |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 376 | features = netdev_increment_features(features, |
| 377 | p->dev->features, mask); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 380 | done: |
| 381 | br->dev->features = netdev_fix_features(features, NULL); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 382 | } |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | /* called with RTNL */ |
| 385 | int br_add_if(struct net_bridge *br, struct net_device *dev) |
| 386 | { |
| 387 | struct net_bridge_port *p; |
| 388 | int err = 0; |
| 389 | |
Stephen Hemminger | 1056bd5 | 2009-11-05 20:46:52 -0800 | [diff] [blame] | 390 | /* Don't allow bridging non-ethernet like devices */ |
| 391 | if ((dev->flags & IFF_LOOPBACK) || |
| 392 | dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | return -EINVAL; |
| 394 | |
Stephen Hemminger | 1056bd5 | 2009-11-05 20:46:52 -0800 | [diff] [blame] | 395 | /* No bridging of bridges */ |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 396 | if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | return -ELOOP; |
| 398 | |
Stephen Hemminger | 1056bd5 | 2009-11-05 20:46:52 -0800 | [diff] [blame] | 399 | /* Device is already being bridged */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 400 | if (br_port_exists(dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return -EBUSY; |
| 402 | |
Johannes Berg | ad4bb6f | 2009-11-19 00:56:30 +0100 | [diff] [blame] | 403 | /* No bridging devices that dislike that (e.g. wireless) */ |
| 404 | if (dev->priv_flags & IFF_DONT_BRIDGE) |
| 405 | return -EOPNOTSUPP; |
| 406 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 407 | p = new_nbp(br, dev); |
| 408 | if (IS_ERR(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | return PTR_ERR(p); |
| 410 | |
Wang Chen | bc3f907 | 2008-07-14 20:53:13 -0700 | [diff] [blame] | 411 | err = dev_set_promiscuity(dev, 1); |
| 412 | if (err) |
| 413 | goto put_back; |
| 414 | |
Greg Kroah-Hartman | e32cc73 | 2007-12-17 23:05:35 -0700 | [diff] [blame] | 415 | err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj), |
| 416 | SYSFS_BRIDGE_PORT_ATTR); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 417 | if (err) |
| 418 | goto err0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 420 | err = br_fdb_insert(br, p, dev->dev_addr); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 421 | if (err) |
| 422 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 424 | err = br_sysfs_addif(p); |
| 425 | if (err) |
| 426 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Herbert Xu | 91d2c34 | 2010-06-10 16:12:50 +0000 | [diff] [blame] | 428 | if (br_netpoll_info(br) && ((err = br_netpoll_enable(p)))) |
| 429 | goto err3; |
| 430 | |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 431 | err = netdev_rx_handler_register(dev, br_handle_frame, p); |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 432 | if (err) |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 433 | goto err3; |
| 434 | |
| 435 | dev->priv_flags |= IFF_BRIDGE_PORT; |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 436 | |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 437 | dev_disable_lro(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 439 | list_add_rcu(&p->list, &br->port_list); |
| 440 | |
| 441 | spin_lock_bh(&br->lock); |
| 442 | br_stp_recalculate_bridge_id(br); |
| 443 | br_features_recompute(br); |
Aji Srinivas | de79059 | 2007-03-07 16:10:53 -0800 | [diff] [blame] | 444 | |
| 445 | if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && |
| 446 | (br->dev->flags & IFF_UP)) |
| 447 | br_stp_enable_port(p); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 448 | spin_unlock_bh(&br->lock); |
| 449 | |
Stephen Hemminger | b86c450 | 2007-03-22 14:08:46 -0700 | [diff] [blame] | 450 | br_ifinfo_notify(RTM_NEWLINK, p); |
| 451 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 452 | dev_set_mtu(br->dev, br_min_mtu(br)); |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 453 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 454 | kobject_uevent(&p->kobj, KOBJ_ADD); |
| 455 | |
| 456 | return 0; |
Herbert Xu | 91d2c34 | 2010-06-10 16:12:50 +0000 | [diff] [blame] | 457 | err3: |
| 458 | sysfs_remove_link(br->ifobj, p->dev->name); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 459 | err2: |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 460 | br_fdb_delete_by_port(br, p, 1); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 461 | err1: |
Xiaotian Feng | c587aea | 2009-07-23 23:06:32 +0000 | [diff] [blame] | 462 | kobject_put(&p->kobj); |
Jeff Hansen | 30df94f | 2009-09-28 12:54:25 -0700 | [diff] [blame] | 463 | p = NULL; /* kobject_put frees */ |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 464 | err0: |
Wang Chen | bc3f907 | 2008-07-14 20:53:13 -0700 | [diff] [blame] | 465 | dev_set_promiscuity(dev, -1); |
Volodymyr G Lukiianyk | 43af853 | 2008-04-29 03:17:42 -0700 | [diff] [blame] | 466 | put_back: |
| 467 | dev_put(dev); |
Wang Chen | bc3f907 | 2008-07-14 20:53:13 -0700 | [diff] [blame] | 468 | kfree(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | return err; |
| 470 | } |
| 471 | |
| 472 | /* called with RTNL */ |
| 473 | int br_del_if(struct net_bridge *br, struct net_device *dev) |
| 474 | { |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 475 | struct net_bridge_port *p; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 476 | |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 477 | if (!br_port_exists(dev)) |
| 478 | return -EINVAL; |
| 479 | |
| 480 | p = br_port_get(dev); |
| 481 | if (p->br != br) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | return -EINVAL; |
| 483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | del_nbp(p); |
| 485 | |
| 486 | spin_lock_bh(&br->lock); |
| 487 | br_stp_recalculate_bridge_id(br); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 488 | br_features_recompute(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | spin_unlock_bh(&br->lock); |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 494 | void __net_exit br_net_exit(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | { |
Patrick McHardy | ab1b204 | 2008-07-03 03:53:42 -0700 | [diff] [blame] | 496 | struct net_device *dev; |
Eric Dumazet | 8c56ba0 | 2009-10-28 05:35:35 +0000 | [diff] [blame] | 497 | LIST_HEAD(list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
| 499 | rtnl_lock(); |
Eric Dumazet | 8c56ba0 | 2009-10-28 05:35:35 +0000 | [diff] [blame] | 500 | for_each_netdev(net, dev) |
| 501 | if (dev->priv_flags & IFF_EBRIDGE) |
| 502 | del_br(netdev_priv(dev), &list); |
| 503 | |
| 504 | unregister_netdevice_many(&list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | rtnl_unlock(); |
| 506 | |
| 507 | } |