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 | * |
| 32 | * Need to simulate user ioctl because not all device's that support |
| 33 | * ethtool, use ethtool_ops. Also, since driver might sleep need to |
| 34 | * not be holding any locks. |
| 35 | */ |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 36 | static int port_cost(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
| 39 | struct ifreq ifr; |
| 40 | mm_segment_t old_fs; |
| 41 | int err; |
| 42 | |
| 43 | strncpy(ifr.ifr_name, dev->name, IFNAMSIZ); |
| 44 | ifr.ifr_data = (void __user *) &ecmd; |
| 45 | |
| 46 | old_fs = get_fs(); |
| 47 | set_fs(KERNEL_DS); |
| 48 | err = dev_ethtool(&ifr); |
| 49 | set_fs(old_fs); |
| 50 | |
| 51 | if (!err) { |
| 52 | switch(ecmd.speed) { |
| 53 | case SPEED_100: |
| 54 | return 19; |
| 55 | case SPEED_1000: |
| 56 | return 4; |
| 57 | case SPEED_10000: |
| 58 | return 2; |
| 59 | case SPEED_10: |
| 60 | return 100; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | } |
| 62 | } |
| 63 | |
| 64 | /* Old silly heuristics based on name */ |
| 65 | if (!strncmp(dev->name, "lec", 3)) |
| 66 | return 7; |
| 67 | |
| 68 | if (!strncmp(dev->name, "plip", 4)) |
| 69 | return 2500; |
| 70 | |
| 71 | return 100; /* assume old 10Mbps */ |
| 72 | } |
| 73 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 74 | |
| 75 | /* |
| 76 | * Check for port carrier transistions. |
| 77 | * Called from work queue to allow for calling functions that |
| 78 | * might sleep (such as speed check), and to debounce. |
| 79 | */ |
| 80 | static void port_carrier_check(void *arg) |
| 81 | { |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 82 | struct net_device *dev = arg; |
| 83 | struct net_bridge_port *p; |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 84 | struct net_bridge *br; |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 85 | |
| 86 | rtnl_lock(); |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 87 | p = dev->br_port; |
| 88 | if (!p) |
| 89 | goto done; |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 90 | br = p->br; |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 91 | |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 92 | if (netif_carrier_ok(dev)) |
| 93 | p->path_cost = port_cost(dev); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 94 | |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 95 | if (br->dev->flags & IFF_UP) { |
| 96 | spin_lock_bh(&br->lock); |
| 97 | if (netif_carrier_ok(dev)) { |
| 98 | if (p->state == BR_STATE_DISABLED) |
| 99 | br_stp_enable_port(p); |
| 100 | } else { |
| 101 | if (p->state != BR_STATE_DISABLED) |
| 102 | br_stp_disable_port(p); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 103 | } |
Stephen Hemminger | 6e86b89 | 2006-03-03 17:14:51 -0800 | [diff] [blame] | 104 | spin_unlock_bh(&br->lock); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 105 | } |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 106 | done: |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 107 | rtnl_unlock(); |
| 108 | } |
| 109 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 110 | static void release_nbp(struct kobject *kobj) |
| 111 | { |
| 112 | struct net_bridge_port *p |
| 113 | = container_of(kobj, struct net_bridge_port, kobj); |
| 114 | kfree(p); |
| 115 | } |
| 116 | |
| 117 | static struct kobj_type brport_ktype = { |
| 118 | #ifdef CONFIG_SYSFS |
| 119 | .sysfs_ops = &brport_sysfs_ops, |
| 120 | #endif |
| 121 | .release = release_nbp, |
| 122 | }; |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | static void destroy_nbp(struct net_bridge_port *p) |
| 125 | { |
| 126 | struct net_device *dev = p->dev; |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | p->br = NULL; |
| 129 | p->dev = NULL; |
| 130 | dev_put(dev); |
| 131 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 132 | kobject_put(&p->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | static void destroy_nbp_rcu(struct rcu_head *head) |
| 136 | { |
| 137 | struct net_bridge_port *p = |
| 138 | container_of(head, struct net_bridge_port, rcu); |
| 139 | destroy_nbp(p); |
| 140 | } |
| 141 | |
Stephen Hemminger | 3f4cfc2 | 2006-01-31 17:44:07 -0800 | [diff] [blame] | 142 | /* Delete port(interface) from bridge is done in two steps. |
| 143 | * via RCU. First step, marks device as down. That deletes |
| 144 | * all the timers and stops new packets from flowing through. |
| 145 | * |
| 146 | * Final cleanup doesn't occur until after all CPU's finished |
| 147 | * processing packets. |
| 148 | * |
| 149 | * Protected from multiple admin operations by RTNL mutex |
| 150 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | static void del_nbp(struct net_bridge_port *p) |
| 152 | { |
| 153 | struct net_bridge *br = p->br; |
| 154 | struct net_device *dev = p->dev; |
| 155 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 156 | sysfs_remove_link(&br->ifobj, dev->name); |
| 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | dev_set_promiscuity(dev, -1); |
| 159 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 160 | cancel_delayed_work(&p->carrier_check); |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | spin_lock_bh(&br->lock); |
| 163 | br_stp_disable_port(p); |
| 164 | spin_unlock_bh(&br->lock); |
| 165 | |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame^] | 166 | br_fdb_delete_by_port(br, p, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
| 168 | list_del_rcu(&p->list); |
| 169 | |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 170 | rcu_assign_pointer(dev->br_port, NULL); |
| 171 | |
Stephen Hemminger | 125a12c | 2006-03-03 17:16:15 -0800 | [diff] [blame] | 172 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 173 | kobject_del(&p->kobj); |
| 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | call_rcu(&p->rcu, destroy_nbp_rcu); |
| 176 | } |
| 177 | |
| 178 | /* called with RTNL */ |
| 179 | static void del_br(struct net_bridge *br) |
| 180 | { |
| 181 | struct net_bridge_port *p, *n; |
| 182 | |
| 183 | list_for_each_entry_safe(p, n, &br->port_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | del_nbp(p); |
| 185 | } |
| 186 | |
| 187 | del_timer_sync(&br->gc_timer); |
| 188 | |
| 189 | br_sysfs_delbr(br->dev); |
| 190 | unregister_netdevice(br->dev); |
| 191 | } |
| 192 | |
| 193 | static struct net_device *new_bridge_dev(const char *name) |
| 194 | { |
| 195 | struct net_bridge *br; |
| 196 | struct net_device *dev; |
| 197 | |
| 198 | dev = alloc_netdev(sizeof(struct net_bridge), name, |
| 199 | br_dev_setup); |
| 200 | |
| 201 | if (!dev) |
| 202 | return NULL; |
| 203 | |
| 204 | br = netdev_priv(dev); |
| 205 | br->dev = dev; |
| 206 | |
| 207 | spin_lock_init(&br->lock); |
| 208 | INIT_LIST_HEAD(&br->port_list); |
| 209 | spin_lock_init(&br->hash_lock); |
| 210 | |
| 211 | br->bridge_id.prio[0] = 0x80; |
| 212 | br->bridge_id.prio[1] = 0x00; |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 213 | |
| 214 | memcpy(br->group_addr, br_group_address, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Stephen Hemminger | edb5e46 | 2005-12-21 19:00:58 -0800 | [diff] [blame] | 216 | br->feature_mask = dev->features; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | br->stp_enabled = 0; |
| 218 | br->designated_root = br->bridge_id; |
| 219 | br->root_path_cost = 0; |
| 220 | br->root_port = 0; |
| 221 | br->bridge_max_age = br->max_age = 20 * HZ; |
| 222 | br->bridge_hello_time = br->hello_time = 2 * HZ; |
| 223 | br->bridge_forward_delay = br->forward_delay = 15 * HZ; |
| 224 | br->topology_change = 0; |
| 225 | br->topology_change_detected = 0; |
| 226 | br->ageing_time = 300 * HZ; |
| 227 | INIT_LIST_HEAD(&br->age_list); |
| 228 | |
| 229 | br_stp_timer_init(br); |
| 230 | |
| 231 | return dev; |
| 232 | } |
| 233 | |
| 234 | /* find an available port number */ |
| 235 | static int find_portno(struct net_bridge *br) |
| 236 | { |
| 237 | int index; |
| 238 | struct net_bridge_port *p; |
| 239 | unsigned long *inuse; |
| 240 | |
Stephen Hemminger | 3b781fa | 2006-03-20 22:56:50 -0800 | [diff] [blame] | 241 | inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | GFP_KERNEL); |
| 243 | if (!inuse) |
| 244 | return -ENOMEM; |
| 245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | set_bit(0, inuse); /* zero is reserved */ |
| 247 | list_for_each_entry(p, &br->port_list, list) { |
| 248 | set_bit(p->port_no, inuse); |
| 249 | } |
| 250 | index = find_first_zero_bit(inuse, BR_MAX_PORTS); |
| 251 | kfree(inuse); |
| 252 | |
| 253 | return (index >= BR_MAX_PORTS) ? -EXFULL : index; |
| 254 | } |
| 255 | |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 256 | /* called with RTNL but without bridge lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | static struct net_bridge_port *new_nbp(struct net_bridge *br, |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 258 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
| 260 | int index; |
| 261 | struct net_bridge_port *p; |
| 262 | |
| 263 | index = find_portno(br); |
| 264 | if (index < 0) |
| 265 | return ERR_PTR(index); |
| 266 | |
Stephen Hemminger | cee4854 | 2006-03-20 22:57:03 -0800 | [diff] [blame] | 267 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | if (p == NULL) |
| 269 | return ERR_PTR(-ENOMEM); |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | p->br = br; |
| 272 | dev_hold(dev); |
| 273 | p->dev = dev; |
Stephen Hemminger | 4433f42 | 2005-12-20 15:19:51 -0800 | [diff] [blame] | 274 | p->path_cost = port_cost(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | p->priority = 0x8000 >> BR_PORT_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | p->port_no = index; |
| 277 | br_init_port(p); |
| 278 | p->state = BR_STATE_DISABLED; |
Stephen Hemminger | b3f1be4 | 2006-02-09 17:08:52 -0800 | [diff] [blame] | 279 | INIT_WORK(&p->carrier_check, port_carrier_check, dev); |
Stephen Hemminger | d32439c | 2006-03-03 17:15:34 -0800 | [diff] [blame] | 280 | br_stp_port_timer_init(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Stephen Hemminger | d32439c | 2006-03-03 17:15:34 -0800 | [diff] [blame] | 282 | kobject_init(&p->kobj); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 283 | kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR); |
| 284 | p->kobj.ktype = &brport_ktype; |
| 285 | p->kobj.parent = &(dev->class_dev.kobj); |
| 286 | p->kobj.kset = NULL; |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return p; |
| 289 | } |
| 290 | |
| 291 | int br_add_bridge(const char *name) |
| 292 | { |
| 293 | struct net_device *dev; |
| 294 | int ret; |
| 295 | |
| 296 | dev = new_bridge_dev(name); |
| 297 | if (!dev) |
| 298 | return -ENOMEM; |
| 299 | |
| 300 | rtnl_lock(); |
| 301 | if (strchr(dev->name, '%')) { |
| 302 | ret = dev_alloc_name(dev, dev->name); |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 303 | if (ret < 0) { |
| 304 | free_netdev(dev); |
| 305 | goto out; |
| 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | ret = register_netdevice(dev); |
| 310 | if (ret) |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 311 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | ret = br_sysfs_addbr(dev); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 314 | if (ret) |
Jiri Benc | 3648570 | 2006-06-05 16:39:34 -0700 | [diff] [blame] | 315 | unregister_netdevice(dev); |
| 316 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | rtnl_unlock(); |
Stephen Hemminger | ac05202 | 2006-05-10 13:21:53 -0700 | [diff] [blame] | 318 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | int br_del_bridge(const char *name) |
| 322 | { |
| 323 | struct net_device *dev; |
| 324 | int ret = 0; |
| 325 | |
| 326 | rtnl_lock(); |
| 327 | dev = __dev_get_by_name(name); |
| 328 | if (dev == NULL) |
| 329 | ret = -ENXIO; /* Could not find device */ |
| 330 | |
| 331 | else if (!(dev->priv_flags & IFF_EBRIDGE)) { |
| 332 | /* Attempt to delete non bridge device! */ |
| 333 | ret = -EPERM; |
| 334 | } |
| 335 | |
| 336 | else if (dev->flags & IFF_UP) { |
| 337 | /* Not shutdown yet. */ |
| 338 | ret = -EBUSY; |
| 339 | } |
| 340 | |
| 341 | else |
| 342 | del_br(netdev_priv(dev)); |
| 343 | |
| 344 | rtnl_unlock(); |
| 345 | return ret; |
| 346 | } |
| 347 | |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 348 | /* 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] | 349 | int br_min_mtu(const struct net_bridge *br) |
| 350 | { |
| 351 | const struct net_bridge_port *p; |
| 352 | int mtu = 0; |
| 353 | |
| 354 | ASSERT_RTNL(); |
| 355 | |
| 356 | if (list_empty(&br->port_list)) |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 357 | mtu = ETH_DATA_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | else { |
| 359 | list_for_each_entry(p, &br->port_list, list) { |
| 360 | if (!mtu || p->dev->mtu < mtu) |
| 361 | mtu = p->dev->mtu; |
| 362 | } |
| 363 | } |
| 364 | return mtu; |
| 365 | } |
| 366 | |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 367 | /* |
| 368 | * Recomputes features using slave's features |
| 369 | */ |
| 370 | void br_features_recompute(struct net_bridge *br) |
| 371 | { |
| 372 | struct net_bridge_port *p; |
| 373 | unsigned long features, checksum; |
| 374 | |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 375 | checksum = br->feature_mask & NETIF_F_ALL_CSUM ? NETIF_F_NO_CSUM : 0; |
| 376 | features = br->feature_mask & ~NETIF_F_ALL_CSUM; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 377 | |
| 378 | list_for_each_entry(p, &br->port_list, list) { |
Herbert Xu | 37c3185 | 2006-06-22 03:07:29 -0700 | [diff] [blame] | 379 | unsigned long feature = p->dev->features; |
| 380 | |
| 381 | if (checksum & NETIF_F_NO_CSUM && !(feature & NETIF_F_NO_CSUM)) |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 382 | checksum ^= NETIF_F_NO_CSUM | NETIF_F_HW_CSUM; |
Herbert Xu | 37c3185 | 2006-06-22 03:07:29 -0700 | [diff] [blame] | 383 | if (checksum & NETIF_F_HW_CSUM && !(feature & NETIF_F_HW_CSUM)) |
Herbert Xu | 2c6cc0d | 2006-06-17 22:06:45 -0700 | [diff] [blame] | 384 | checksum ^= NETIF_F_HW_CSUM | NETIF_F_IP_CSUM; |
Herbert Xu | 37c3185 | 2006-06-22 03:07:29 -0700 | [diff] [blame] | 385 | if (!(feature & NETIF_F_IP_CSUM)) |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 386 | checksum = 0; |
Herbert Xu | 37c3185 | 2006-06-22 03:07:29 -0700 | [diff] [blame] | 387 | |
| 388 | if (feature & NETIF_F_GSO) |
Herbert Xu | 78eb887 | 2006-08-17 18:22:32 -0700 | [diff] [blame] | 389 | feature |= NETIF_F_GSO_SOFTWARE; |
Herbert Xu | 37c3185 | 2006-06-22 03:07:29 -0700 | [diff] [blame] | 390 | feature |= NETIF_F_GSO; |
| 391 | |
| 392 | features &= feature; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Herbert Xu | 78eb887 | 2006-08-17 18:22:32 -0700 | [diff] [blame] | 395 | if (!(checksum & NETIF_F_ALL_CSUM)) |
| 396 | features &= ~NETIF_F_SG; |
| 397 | if (!(features & NETIF_F_SG)) |
| 398 | features &= ~NETIF_F_GSO_MASK; |
| 399 | |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 400 | br->dev->features = features | checksum | NETIF_F_LLTX | |
| 401 | NETIF_F_GSO_ROBUST; |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | /* called with RTNL */ |
| 405 | int br_add_if(struct net_bridge *br, struct net_device *dev) |
| 406 | { |
| 407 | struct net_bridge_port *p; |
| 408 | int err = 0; |
| 409 | |
| 410 | if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER) |
| 411 | return -EINVAL; |
| 412 | |
| 413 | if (dev->hard_start_xmit == br_dev_xmit) |
| 414 | return -ELOOP; |
| 415 | |
| 416 | if (dev->br_port != NULL) |
| 417 | return -EBUSY; |
| 418 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 419 | p = new_nbp(br, dev); |
| 420 | if (IS_ERR(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | return PTR_ERR(p); |
| 422 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 423 | err = kobject_add(&p->kobj); |
| 424 | if (err) |
| 425 | goto err0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 427 | err = br_fdb_insert(br, p, dev->dev_addr); |
| 428 | if (err) |
| 429 | goto err1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 431 | err = br_sysfs_addif(p); |
| 432 | if (err) |
| 433 | goto err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 435 | rcu_assign_pointer(dev->br_port, p); |
| 436 | dev_set_promiscuity(dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 438 | list_add_rcu(&p->list, &br->port_list); |
| 439 | |
| 440 | spin_lock_bh(&br->lock); |
| 441 | br_stp_recalculate_bridge_id(br); |
| 442 | br_features_recompute(br); |
| 443 | schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE); |
| 444 | spin_unlock_bh(&br->lock); |
| 445 | |
| 446 | dev_set_mtu(br->dev, br_min_mtu(br)); |
| 447 | kobject_uevent(&p->kobj, KOBJ_ADD); |
| 448 | |
| 449 | return 0; |
| 450 | err2: |
Stephen Hemminger | 1a62069 | 2006-10-12 14:45:38 -0700 | [diff] [blame^] | 451 | br_fdb_delete_by_port(br, p, 1); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 452 | err1: |
| 453 | kobject_del(&p->kobj); |
| 454 | err0: |
| 455 | kobject_put(&p->kobj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | return err; |
| 457 | } |
| 458 | |
| 459 | /* called with RTNL */ |
| 460 | int br_del_if(struct net_bridge *br, struct net_device *dev) |
| 461 | { |
| 462 | struct net_bridge_port *p = dev->br_port; |
| 463 | |
| 464 | if (!p || p->br != br) |
| 465 | return -EINVAL; |
| 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | del_nbp(p); |
| 468 | |
| 469 | spin_lock_bh(&br->lock); |
| 470 | br_stp_recalculate_bridge_id(br); |
Stephen Hemminger | 81d3530 | 2005-05-29 14:15:17 -0700 | [diff] [blame] | 471 | br_features_recompute(br); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | spin_unlock_bh(&br->lock); |
| 473 | |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | void __exit br_cleanup_bridges(void) |
| 478 | { |
| 479 | struct net_device *dev, *nxt; |
| 480 | |
| 481 | rtnl_lock(); |
| 482 | for (dev = dev_base; dev; dev = nxt) { |
| 483 | nxt = dev->next; |
| 484 | if (dev->priv_flags & IFF_EBRIDGE) |
| 485 | del_br(dev->priv); |
| 486 | } |
| 487 | rtnl_unlock(); |
| 488 | |
| 489 | } |