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> |
| 16 | #include <linux/ethtool.h> |
| 17 | #include <linux/if_arp.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/rtnetlink.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 21 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <net/sock.h> |
| 23 | |
| 24 | #include "br_private.h" |
| 25 | |
| 26 | /* |
| 27 | * Determine initial path cost based on speed. |
| 28 | * using recommendations from 802.1d standard |
| 29 | * |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 30 | * Since driver might sleep need to not be holding any locks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | */ |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 32 | static int port_cost(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | { |
Stephen Hemminger | b4a488d | 2007-08-30 22:16:22 -0700 | [diff] [blame] | 34 | if (dev->ethtool_ops && dev->ethtool_ops->get_settings) { |
| 35 | struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET, }; |
| 36 | |
| 37 | if (!dev->ethtool_ops->get_settings(dev, &ecmd)) { |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 38 | switch(ecmd.speed) { |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 39 | case SPEED_10000: |
| 40 | return 2; |
Stephen Hemminger | b4a488d | 2007-08-30 22:16:22 -0700 | [diff] [blame] | 41 | case SPEED_1000: |
| 42 | return 4; |
| 43 | case SPEED_100: |
| 44 | return 19; |
Matthew Wilcox | 61a44b9 | 2007-07-31 14:00:02 -0700 | [diff] [blame] | 45 | case SPEED_10: |
| 46 | return 100; |
| 47 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | } |
| 49 | } |
| 50 | |
| 51 | /* Old silly heuristics based on name */ |
| 52 | if (!strncmp(dev->name, "lec", 3)) |
| 53 | return 7; |
| 54 | |
| 55 | if (!strncmp(dev->name, "plip", 4)) |
| 56 | return 2500; |
| 57 | |
| 58 | return 100; /* assume old 10Mbps */ |
| 59 | } |
| 60 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 61 | |
| 62 | /* |
| 63 | * Check for port carrier transistions. |
| 64 | * Called from work queue to allow for calling functions that |
| 65 | * might sleep (such as speed check), and to debounce. |
| 66 | */ |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 67 | void br_port_carrier_check(struct net_bridge_port *p) |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 68 | { |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 69 | struct net_device *dev = p->dev; |
| 70 | struct net_bridge *br = p->br; |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 71 | |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 72 | if (netif_carrier_ok(dev)) |
| 73 | p->path_cost = port_cost(dev); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 74 | |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 75 | if (netif_running(br->dev)) { |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 76 | spin_lock_bh(&br->lock); |
| 77 | if (netif_carrier_ok(dev)) { |
| 78 | if (p->state == BR_STATE_DISABLED) |
| 79 | br_stp_enable_port(p); |
| 80 | } else { |
| 81 | if (p->state != BR_STATE_DISABLED) |
| 82 | br_stp_disable_port(p); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 83 | } |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 84 | spin_unlock_bh(&br->lock); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 85 | } |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 86 | } |
| 87 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 88 | static void release_nbp(struct kobject *kobj) |
| 89 | { |
| 90 | struct net_bridge_port *p |
| 91 | = container_of(kobj, struct net_bridge_port, kobj); |
| 92 | kfree(p); |
| 93 | } |
| 94 | |
| 95 | static struct kobj_type brport_ktype = { |
| 96 | #ifdef CONFIG_SYSFS |
| 97 | .sysfs_ops = &brport_sysfs_ops, |
| 98 | #endif |
| 99 | .release = release_nbp, |
| 100 | }; |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | static void destroy_nbp(struct net_bridge_port *p) |
| 103 | { |
| 104 | struct net_device *dev = p->dev; |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | p->br = NULL; |
| 107 | p->dev = NULL; |
| 108 | dev_put(dev); |
| 109 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 110 | kobject_put(&p->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | static void destroy_nbp_rcu(struct rcu_head *head) |
| 114 | { |
| 115 | struct net_bridge_port *p = |
| 116 | container_of(head, struct net_bridge_port, rcu); |
| 117 | destroy_nbp(p); |
| 118 | } |
| 119 | |
Stephen Hemminger | 3f4cfc2 | 2006-01-31 17:44:07 -0800 | [diff] [blame] | 120 | /* Delete port(interface) from bridge is done in two steps. |
| 121 | * via RCU. First step, marks device as down. That deletes |
| 122 | * all the timers and stops new packets from flowing through. |
| 123 | * |
| 124 | * Final cleanup doesn't occur until after all CPU's finished |
| 125 | * processing packets. |
| 126 | * |
| 127 | * Protected from multiple admin operations by RTNL mutex |
| 128 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static void del_nbp(struct net_bridge_port *p) |
| 130 | { |
| 131 | struct net_bridge *br = p->br; |
| 132 | struct net_device *dev = p->dev; |
| 133 | |
Greg Kroah-Hartman | 43b98c4 | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 134 | sysfs_remove_link(br->ifobj, dev->name); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | dev_set_promiscuity(dev, -1); |
| 137 | |
| 138 | spin_lock_bh(&br->lock); |
| 139 | br_stp_disable_port(p); |
| 140 | spin_unlock_bh(&br->lock); |
| 141 | |
Stephen Hemminger | b86c450 | 2007-03-22 14:08:46 -0700 | [diff] [blame] | 142 | br_ifinfo_notify(RTM_DELLINK, p); |
| 143 | |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 144 | br_fdb_delete_by_port(br, p, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | list_del_rcu(&p->list); |
| 147 | |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 148 | rcu_assign_pointer(dev->br_port, NULL); |
| 149 | |
Stephen Hemminger | 125a12c | 2006-03-03 17:16:15 -0800 | [diff] [blame] | 150 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 151 | kobject_del(&p->kobj); |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | call_rcu(&p->rcu, destroy_nbp_rcu); |
| 154 | } |
| 155 | |
| 156 | /* called with RTNL */ |
| 157 | static void del_br(struct net_bridge *br) |
| 158 | { |
| 159 | struct net_bridge_port *p, *n; |
| 160 | |
| 161 | list_for_each_entry_safe(p, n, &br->port_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | del_nbp(p); |
| 163 | } |
| 164 | |
| 165 | del_timer_sync(&br->gc_timer); |
| 166 | |
| 167 | br_sysfs_delbr(br->dev); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 168 | unregister_netdevice(br->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 171 | 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] | 172 | { |
| 173 | struct net_bridge *br; |
| 174 | struct net_device *dev; |
| 175 | |
| 176 | dev = alloc_netdev(sizeof(struct net_bridge), name, |
| 177 | br_dev_setup); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | if (!dev) |
| 180 | return NULL; |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 181 | dev_net_set(dev, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | br = netdev_priv(dev); |
| 184 | br->dev = dev; |
| 185 | |
| 186 | spin_lock_init(&br->lock); |
| 187 | INIT_LIST_HEAD(&br->port_list); |
| 188 | spin_lock_init(&br->hash_lock); |
| 189 | |
| 190 | br->bridge_id.prio[0] = 0x80; |
| 191 | br->bridge_id.prio[1] = 0x00; |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 192 | |
| 193 | memcpy(br->group_addr, br_group_address, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 195 | br->feature_mask = dev->features; |
Stephen Hemminger | 9cde070 | 2007-03-21 14:22:44 -0700 | [diff] [blame] | 196 | br->stp_enabled = BR_NO_STP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | br->designated_root = br->bridge_id; |
| 198 | br->root_path_cost = 0; |
| 199 | br->root_port = 0; |
| 200 | br->bridge_max_age = br->max_age = 20 * HZ; |
| 201 | br->bridge_hello_time = br->hello_time = 2 * HZ; |
| 202 | br->bridge_forward_delay = br->forward_delay = 15 * HZ; |
| 203 | br->topology_change = 0; |
| 204 | br->topology_change_detected = 0; |
| 205 | br->ageing_time = 300 * HZ; |
Simon Wunderlich | 4adf0af | 2008-07-30 16:27:55 -0700 | [diff] [blame] | 206 | |
| 207 | br_netfilter_rtable_init(br); |
| 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | INIT_LIST_HEAD(&br->age_list); |
| 210 | |
| 211 | br_stp_timer_init(br); |
| 212 | |
| 213 | return dev; |
| 214 | } |
| 215 | |
| 216 | /* find an available port number */ |
| 217 | static int find_portno(struct net_bridge *br) |
| 218 | { |
| 219 | int index; |
| 220 | struct net_bridge_port *p; |
| 221 | unsigned long *inuse; |
| 222 | |
Stephen Hemminger | 3b781fa | 2006-03-20 22:56:50 -0800 | [diff] [blame] | 223 | inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | GFP_KERNEL); |
| 225 | if (!inuse) |
| 226 | return -ENOMEM; |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | set_bit(0, inuse); /* zero is reserved */ |
| 229 | list_for_each_entry(p, &br->port_list, list) { |
| 230 | set_bit(p->port_no, inuse); |
| 231 | } |
| 232 | index = find_first_zero_bit(inuse, BR_MAX_PORTS); |
| 233 | kfree(inuse); |
| 234 | |
| 235 | return (index >= BR_MAX_PORTS) ? -EXFULL : index; |
| 236 | } |
| 237 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 238 | /* called with RTNL but without bridge lock */ |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 239 | static struct net_bridge_port *new_nbp(struct net_bridge *br, |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 240 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
| 242 | int index; |
| 243 | struct net_bridge_port *p; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | index = find_portno(br); |
| 246 | if (index < 0) |
| 247 | return ERR_PTR(index); |
| 248 | |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 249 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | if (p == NULL) |
| 251 | return ERR_PTR(-ENOMEM); |
| 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | p->br = br; |
| 254 | dev_hold(dev); |
| 255 | p->dev = dev; |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 256 | p->path_cost = port_cost(dev); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 257 | p->priority = 0x8000 >> BR_PORT_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | p->port_no = index; |
| 259 | br_init_port(p); |
| 260 | p->state = BR_STATE_DISABLED; |
Stephen Hemminger | d32439c | 2006-03-03 17:15:34 -0800 | [diff] [blame] | 261 | br_stp_port_timer_init(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
| 263 | return p; |
| 264 | } |
| 265 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 266 | int br_add_bridge(struct net *net, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
| 268 | struct net_device *dev; |
| 269 | int ret; |
| 270 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 271 | dev = new_bridge_dev(net, name); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 272 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | return -ENOMEM; |
| 274 | |
| 275 | rtnl_lock(); |
| 276 | if (strchr(dev->name, '%')) { |
| 277 | ret = dev_alloc_name(dev, dev->name); |
Pavel Emelyanov | e340a90 | 2008-05-04 17:58:07 -0700 | [diff] [blame] | 278 | if (ret < 0) |
| 279 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | ret = register_netdevice(dev); |
Pavel Emelyanov | e340a90 | 2008-05-04 17:58:07 -0700 | [diff] [blame] | 283 | if (ret) |
| 284 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | ret = br_sysfs_addbr(dev); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 287 | if (ret) |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 288 | unregister_netdevice(dev); |
| 289 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | rtnl_unlock(); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 291 | return ret; |
Pavel Emelyanov | e340a90 | 2008-05-04 17:58:07 -0700 | [diff] [blame] | 292 | |
| 293 | out_free: |
| 294 | free_netdev(dev); |
| 295 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 298 | int br_del_bridge(struct net *net, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | { |
| 300 | struct net_device *dev; |
| 301 | int ret = 0; |
| 302 | |
| 303 | rtnl_lock(); |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 304 | dev = __dev_get_by_name(net, name); |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 305 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | ret = -ENXIO; /* Could not find device */ |
| 307 | |
| 308 | else if (!(dev->priv_flags & IFF_EBRIDGE)) { |
| 309 | /* Attempt to delete non bridge device! */ |
| 310 | ret = -EPERM; |
| 311 | } |
| 312 | |
| 313 | else if (dev->flags & IFF_UP) { |
| 314 | /* Not shutdown yet. */ |
| 315 | ret = -EBUSY; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 316 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 318 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | del_br(netdev_priv(dev)); |
| 320 | |
| 321 | rtnl_unlock(); |
| 322 | return ret; |
| 323 | } |
| 324 | |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 325 | /* 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] | 326 | int br_min_mtu(const struct net_bridge *br) |
| 327 | { |
| 328 | const struct net_bridge_port *p; |
| 329 | int mtu = 0; |
| 330 | |
| 331 | ASSERT_RTNL(); |
| 332 | |
| 333 | if (list_empty(&br->port_list)) |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 334 | mtu = ETH_DATA_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | else { |
| 336 | list_for_each_entry(p, &br->port_list, list) { |
| 337 | if (!mtu || p->dev->mtu < mtu) |
| 338 | mtu = p->dev->mtu; |
| 339 | } |
| 340 | } |
| 341 | return mtu; |
| 342 | } |
| 343 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 344 | /* |
| 345 | * Recomputes features using slave's features |
| 346 | */ |
| 347 | void br_features_recompute(struct net_bridge *br) |
| 348 | { |
| 349 | struct net_bridge_port *p; |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 350 | unsigned long features, mask; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 351 | |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 352 | features = mask = br->feature_mask; |
| 353 | if (list_empty(&br->port_list)) |
| 354 | goto done; |
| 355 | |
| 356 | features &= ~NETIF_F_ONE_FOR_ALL; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 357 | |
| 358 | list_for_each_entry(p, &br->port_list, list) { |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 359 | features = netdev_increment_features(features, |
| 360 | p->dev->features, mask); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Herbert Xu | b63365a | 2008-10-23 01:11:29 -0700 | [diff] [blame] | 363 | done: |
| 364 | br->dev->features = netdev_fix_features(features, NULL); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | /* called with RTNL */ |
| 368 | int br_add_if(struct net_bridge *br, struct net_device *dev) |
| 369 | { |
| 370 | struct net_bridge_port *p; |
| 371 | int err = 0; |
| 372 | |
| 373 | if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER) |
| 374 | return -EINVAL; |
| 375 | |
| 376 | if (dev->hard_start_xmit == br_dev_xmit) |
| 377 | return -ELOOP; |
| 378 | |
| 379 | if (dev->br_port != NULL) |
| 380 | return -EBUSY; |
| 381 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 382 | p = new_nbp(br, dev); |
| 383 | if (IS_ERR(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | return PTR_ERR(p); |
| 385 | |
Wang Chen | bc3f907 | 2008-07-14 20:53:13 -0700 | [diff] [blame] | 386 | err = dev_set_promiscuity(dev, 1); |
| 387 | if (err) |
| 388 | goto put_back; |
| 389 | |
Greg Kroah-Hartman | e32cc73 | 2007-12-17 23:05:35 -0700 | [diff] [blame] | 390 | err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj), |
| 391 | SYSFS_BRIDGE_PORT_ATTR); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 392 | if (err) |
| 393 | goto err0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 395 | err = br_fdb_insert(br, p, dev->dev_addr); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 396 | if (err) |
| 397 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 399 | err = br_sysfs_addif(p); |
| 400 | if (err) |
| 401 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 403 | rcu_assign_pointer(dev->br_port, p); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 404 | dev_disable_lro(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 406 | list_add_rcu(&p->list, &br->port_list); |
| 407 | |
| 408 | spin_lock_bh(&br->lock); |
| 409 | br_stp_recalculate_bridge_id(br); |
| 410 | br_features_recompute(br); |
Aji Srinivas | de79059 | 2007-03-07 16:10:53 -0800 | [diff] [blame] | 411 | |
| 412 | if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && |
| 413 | (br->dev->flags & IFF_UP)) |
| 414 | br_stp_enable_port(p); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 415 | spin_unlock_bh(&br->lock); |
| 416 | |
Stephen Hemminger | b86c450 | 2007-03-22 14:08:46 -0700 | [diff] [blame] | 417 | br_ifinfo_notify(RTM_NEWLINK, p); |
| 418 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 419 | dev_set_mtu(br->dev, br_min_mtu(br)); |
Stephen Hemminger | 269def7 | 2007-02-22 01:10:18 -0800 | [diff] [blame] | 420 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 421 | kobject_uevent(&p->kobj, KOBJ_ADD); |
| 422 | |
| 423 | return 0; |
| 424 | err2: |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame] | 425 | br_fdb_delete_by_port(br, p, 1); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 426 | err1: |
| 427 | kobject_del(&p->kobj); |
| 428 | err0: |
| 429 | kobject_put(&p->kobj); |
Wang Chen | bc3f907 | 2008-07-14 20:53:13 -0700 | [diff] [blame] | 430 | dev_set_promiscuity(dev, -1); |
Volodymyr G Lukiianyk | 43af853 | 2008-04-29 03:17:42 -0700 | [diff] [blame] | 431 | put_back: |
| 432 | dev_put(dev); |
Wang Chen | bc3f907 | 2008-07-14 20:53:13 -0700 | [diff] [blame] | 433 | kfree(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return err; |
| 435 | } |
| 436 | |
| 437 | /* called with RTNL */ |
| 438 | int br_del_if(struct net_bridge *br, struct net_device *dev) |
| 439 | { |
| 440 | struct net_bridge_port *p = dev->br_port; |
YOSHIFUJI Hideaki | 9d6f229 | 2007-02-09 23:24:35 +0900 | [diff] [blame] | 441 | |
| 442 | if (!p || p->br != br) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | return -EINVAL; |
| 444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | del_nbp(p); |
| 446 | |
| 447 | spin_lock_bh(&br->lock); |
| 448 | br_stp_recalculate_bridge_id(br); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 449 | br_features_recompute(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | spin_unlock_bh(&br->lock); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
Alexey Dobriyan | 712d695 | 2008-09-08 16:20:18 -0700 | [diff] [blame] | 455 | void br_net_exit(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | { |
Patrick McHardy | ab1b204 | 2008-07-03 03:53:42 -0700 | [diff] [blame] | 457 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
| 459 | rtnl_lock(); |
Patrick McHardy | ab1b204 | 2008-07-03 03:53:42 -0700 | [diff] [blame] | 460 | restart: |
Alexey Dobriyan | 712d695 | 2008-09-08 16:20:18 -0700 | [diff] [blame] | 461 | for_each_netdev(net, dev) { |
Patrick McHardy | ab1b204 | 2008-07-03 03:53:42 -0700 | [diff] [blame] | 462 | if (dev->priv_flags & IFF_EBRIDGE) { |
Wang Chen | 524ad0a | 2008-11-12 23:39:10 -0800 | [diff] [blame^] | 463 | del_br(netdev_priv(dev)); |
Patrick McHardy | ab1b204 | 2008-07-03 03:53:42 -0700 | [diff] [blame] | 464 | goto restart; |
| 465 | } |
| 466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | rtnl_unlock(); |
| 468 | |
| 469 | } |