Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 1 | /* |
| 2 | * net/core/dev_addr_lists.c - Functions for handling net device lists |
| 3 | * Copyright (c) 2010 Jiri Pirko <jpirko@redhat.com> |
| 4 | * |
| 5 | * This file contains functions for working with unicast, multicast and device |
| 6 | * addresses lists. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/netdevice.h> |
| 15 | #include <linux/rtnetlink.h> |
| 16 | #include <linux/list.h> |
Eric Dumazet | 298b9e4 | 2010-04-07 16:46:36 -0700 | [diff] [blame^] | 17 | #include <linux/proc_fs.h> |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 18 | |
| 19 | /* |
| 20 | * General list handling functions |
| 21 | */ |
| 22 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 23 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
| 24 | unsigned char *addr, int addr_len, |
| 25 | unsigned char addr_type, bool global) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 26 | { |
| 27 | struct netdev_hw_addr *ha; |
| 28 | int alloc_size; |
| 29 | |
| 30 | if (addr_len > MAX_ADDR_LEN) |
| 31 | return -EINVAL; |
| 32 | |
| 33 | list_for_each_entry(ha, &list->list, list) { |
| 34 | if (!memcmp(ha->addr, addr, addr_len) && |
| 35 | ha->type == addr_type) { |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 36 | if (global) { |
| 37 | /* check if addr is already used as global */ |
| 38 | if (ha->global_use) |
| 39 | return 0; |
| 40 | else |
| 41 | ha->global_use = true; |
| 42 | } |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 43 | ha->refcount++; |
| 44 | return 0; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | |
| 49 | alloc_size = sizeof(*ha); |
| 50 | if (alloc_size < L1_CACHE_BYTES) |
| 51 | alloc_size = L1_CACHE_BYTES; |
| 52 | ha = kmalloc(alloc_size, GFP_ATOMIC); |
| 53 | if (!ha) |
| 54 | return -ENOMEM; |
| 55 | memcpy(ha->addr, addr, addr_len); |
| 56 | ha->type = addr_type; |
| 57 | ha->refcount = 1; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 58 | ha->global_use = global; |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 59 | ha->synced = false; |
| 60 | list_add_tail_rcu(&ha->list, &list->list); |
| 61 | list->count++; |
| 62 | return 0; |
| 63 | } |
| 64 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 65 | static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr, |
| 66 | int addr_len, unsigned char addr_type) |
| 67 | { |
| 68 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false); |
| 69 | } |
| 70 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 71 | static void ha_rcu_free(struct rcu_head *head) |
| 72 | { |
| 73 | struct netdev_hw_addr *ha; |
| 74 | |
| 75 | ha = container_of(head, struct netdev_hw_addr, rcu_head); |
| 76 | kfree(ha); |
| 77 | } |
| 78 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 79 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
| 80 | unsigned char *addr, int addr_len, |
| 81 | unsigned char addr_type, bool global) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 82 | { |
| 83 | struct netdev_hw_addr *ha; |
| 84 | |
| 85 | list_for_each_entry(ha, &list->list, list) { |
| 86 | if (!memcmp(ha->addr, addr, addr_len) && |
| 87 | (ha->type == addr_type || !addr_type)) { |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 88 | if (global) { |
| 89 | if (!ha->global_use) |
| 90 | break; |
| 91 | else |
| 92 | ha->global_use = false; |
| 93 | } |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 94 | if (--ha->refcount) |
| 95 | return 0; |
| 96 | list_del_rcu(&ha->list); |
| 97 | call_rcu(&ha->rcu_head, ha_rcu_free); |
| 98 | list->count--; |
| 99 | return 0; |
| 100 | } |
| 101 | } |
| 102 | return -ENOENT; |
| 103 | } |
| 104 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 105 | static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr, |
| 106 | int addr_len, unsigned char addr_type) |
| 107 | { |
| 108 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false); |
| 109 | } |
| 110 | |
| 111 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, |
| 112 | struct netdev_hw_addr_list *from_list, |
| 113 | int addr_len, unsigned char addr_type) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 114 | { |
| 115 | int err; |
| 116 | struct netdev_hw_addr *ha, *ha2; |
| 117 | unsigned char type; |
| 118 | |
| 119 | list_for_each_entry(ha, &from_list->list, list) { |
| 120 | type = addr_type ? addr_type : ha->type; |
| 121 | err = __hw_addr_add(to_list, ha->addr, addr_len, type); |
| 122 | if (err) |
| 123 | goto unroll; |
| 124 | } |
| 125 | return 0; |
| 126 | |
| 127 | unroll: |
| 128 | list_for_each_entry(ha2, &from_list->list, list) { |
| 129 | if (ha2 == ha) |
| 130 | break; |
| 131 | type = addr_type ? addr_type : ha2->type; |
| 132 | __hw_addr_del(to_list, ha2->addr, addr_len, type); |
| 133 | } |
| 134 | return err; |
| 135 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 136 | EXPORT_SYMBOL(__hw_addr_add_multiple); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 137 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 138 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
| 139 | struct netdev_hw_addr_list *from_list, |
| 140 | int addr_len, unsigned char addr_type) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 141 | { |
| 142 | struct netdev_hw_addr *ha; |
| 143 | unsigned char type; |
| 144 | |
| 145 | list_for_each_entry(ha, &from_list->list, list) { |
| 146 | type = addr_type ? addr_type : ha->type; |
| 147 | __hw_addr_del(to_list, ha->addr, addr_len, addr_type); |
| 148 | } |
| 149 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 150 | EXPORT_SYMBOL(__hw_addr_del_multiple); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 151 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 152 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| 153 | struct netdev_hw_addr_list *from_list, |
| 154 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 155 | { |
| 156 | int err = 0; |
| 157 | struct netdev_hw_addr *ha, *tmp; |
| 158 | |
| 159 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
| 160 | if (!ha->synced) { |
| 161 | err = __hw_addr_add(to_list, ha->addr, |
| 162 | addr_len, ha->type); |
| 163 | if (err) |
| 164 | break; |
| 165 | ha->synced = true; |
| 166 | ha->refcount++; |
| 167 | } else if (ha->refcount == 1) { |
| 168 | __hw_addr_del(to_list, ha->addr, addr_len, ha->type); |
| 169 | __hw_addr_del(from_list, ha->addr, addr_len, ha->type); |
| 170 | } |
| 171 | } |
| 172 | return err; |
| 173 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 174 | EXPORT_SYMBOL(__hw_addr_sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 175 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 176 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| 177 | struct netdev_hw_addr_list *from_list, |
| 178 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 179 | { |
| 180 | struct netdev_hw_addr *ha, *tmp; |
| 181 | |
| 182 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
| 183 | if (ha->synced) { |
| 184 | __hw_addr_del(to_list, ha->addr, |
| 185 | addr_len, ha->type); |
| 186 | ha->synced = false; |
| 187 | __hw_addr_del(from_list, ha->addr, |
| 188 | addr_len, ha->type); |
| 189 | } |
| 190 | } |
| 191 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 192 | EXPORT_SYMBOL(__hw_addr_unsync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 193 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 194 | void __hw_addr_flush(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 195 | { |
| 196 | struct netdev_hw_addr *ha, *tmp; |
| 197 | |
| 198 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 199 | list_del_rcu(&ha->list); |
| 200 | call_rcu(&ha->rcu_head, ha_rcu_free); |
| 201 | } |
| 202 | list->count = 0; |
| 203 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 204 | EXPORT_SYMBOL(__hw_addr_flush); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 205 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 206 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 207 | { |
| 208 | INIT_LIST_HEAD(&list->list); |
| 209 | list->count = 0; |
| 210 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 211 | EXPORT_SYMBOL(__hw_addr_init); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 212 | |
| 213 | /* |
| 214 | * Device addresses handling functions |
| 215 | */ |
| 216 | |
| 217 | /** |
| 218 | * dev_addr_flush - Flush device address list |
| 219 | * @dev: device |
| 220 | * |
| 221 | * Flush device address list and reset ->dev_addr. |
| 222 | * |
| 223 | * The caller must hold the rtnl_mutex. |
| 224 | */ |
| 225 | void dev_addr_flush(struct net_device *dev) |
| 226 | { |
| 227 | /* rtnl_mutex must be held here */ |
| 228 | |
| 229 | __hw_addr_flush(&dev->dev_addrs); |
| 230 | dev->dev_addr = NULL; |
| 231 | } |
| 232 | EXPORT_SYMBOL(dev_addr_flush); |
| 233 | |
| 234 | /** |
| 235 | * dev_addr_init - Init device address list |
| 236 | * @dev: device |
| 237 | * |
| 238 | * Init device address list and create the first element, |
| 239 | * used by ->dev_addr. |
| 240 | * |
| 241 | * The caller must hold the rtnl_mutex. |
| 242 | */ |
| 243 | int dev_addr_init(struct net_device *dev) |
| 244 | { |
| 245 | unsigned char addr[MAX_ADDR_LEN]; |
| 246 | struct netdev_hw_addr *ha; |
| 247 | int err; |
| 248 | |
| 249 | /* rtnl_mutex must be held here */ |
| 250 | |
| 251 | __hw_addr_init(&dev->dev_addrs); |
| 252 | memset(addr, 0, sizeof(addr)); |
| 253 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), |
| 254 | NETDEV_HW_ADDR_T_LAN); |
| 255 | if (!err) { |
| 256 | /* |
| 257 | * Get the first (previously created) address from the list |
| 258 | * and set dev_addr pointer to this location. |
| 259 | */ |
| 260 | ha = list_first_entry(&dev->dev_addrs.list, |
| 261 | struct netdev_hw_addr, list); |
| 262 | dev->dev_addr = ha->addr; |
| 263 | } |
| 264 | return err; |
| 265 | } |
| 266 | EXPORT_SYMBOL(dev_addr_init); |
| 267 | |
| 268 | /** |
| 269 | * dev_addr_add - Add a device address |
| 270 | * @dev: device |
| 271 | * @addr: address to add |
| 272 | * @addr_type: address type |
| 273 | * |
| 274 | * Add a device address to the device or increase the reference count if |
| 275 | * it already exists. |
| 276 | * |
| 277 | * The caller must hold the rtnl_mutex. |
| 278 | */ |
| 279 | int dev_addr_add(struct net_device *dev, unsigned char *addr, |
| 280 | unsigned char addr_type) |
| 281 | { |
| 282 | int err; |
| 283 | |
| 284 | ASSERT_RTNL(); |
| 285 | |
| 286 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); |
| 287 | if (!err) |
| 288 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 289 | return err; |
| 290 | } |
| 291 | EXPORT_SYMBOL(dev_addr_add); |
| 292 | |
| 293 | /** |
| 294 | * dev_addr_del - Release a device address. |
| 295 | * @dev: device |
| 296 | * @addr: address to delete |
| 297 | * @addr_type: address type |
| 298 | * |
| 299 | * Release reference to a device address and remove it from the device |
| 300 | * if the reference count drops to zero. |
| 301 | * |
| 302 | * The caller must hold the rtnl_mutex. |
| 303 | */ |
| 304 | int dev_addr_del(struct net_device *dev, unsigned char *addr, |
| 305 | unsigned char addr_type) |
| 306 | { |
| 307 | int err; |
| 308 | struct netdev_hw_addr *ha; |
| 309 | |
| 310 | ASSERT_RTNL(); |
| 311 | |
| 312 | /* |
| 313 | * We can not remove the first address from the list because |
| 314 | * dev->dev_addr points to that. |
| 315 | */ |
| 316 | ha = list_first_entry(&dev->dev_addrs.list, |
| 317 | struct netdev_hw_addr, list); |
| 318 | if (ha->addr == dev->dev_addr && ha->refcount == 1) |
| 319 | return -ENOENT; |
| 320 | |
| 321 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, |
| 322 | addr_type); |
| 323 | if (!err) |
| 324 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 325 | return err; |
| 326 | } |
| 327 | EXPORT_SYMBOL(dev_addr_del); |
| 328 | |
| 329 | /** |
| 330 | * dev_addr_add_multiple - Add device addresses from another device |
| 331 | * @to_dev: device to which addresses will be added |
| 332 | * @from_dev: device from which addresses will be added |
| 333 | * @addr_type: address type - 0 means type will be used from from_dev |
| 334 | * |
| 335 | * Add device addresses of the one device to another. |
| 336 | ** |
| 337 | * The caller must hold the rtnl_mutex. |
| 338 | */ |
| 339 | int dev_addr_add_multiple(struct net_device *to_dev, |
| 340 | struct net_device *from_dev, |
| 341 | unsigned char addr_type) |
| 342 | { |
| 343 | int err; |
| 344 | |
| 345 | ASSERT_RTNL(); |
| 346 | |
| 347 | if (from_dev->addr_len != to_dev->addr_len) |
| 348 | return -EINVAL; |
| 349 | err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, |
| 350 | to_dev->addr_len, addr_type); |
| 351 | if (!err) |
| 352 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); |
| 353 | return err; |
| 354 | } |
| 355 | EXPORT_SYMBOL(dev_addr_add_multiple); |
| 356 | |
| 357 | /** |
| 358 | * dev_addr_del_multiple - Delete device addresses by another device |
| 359 | * @to_dev: device where the addresses will be deleted |
| 360 | * @from_dev: device by which addresses the addresses will be deleted |
| 361 | * @addr_type: address type - 0 means type will used from from_dev |
| 362 | * |
| 363 | * Deletes addresses in to device by the list of addresses in from device. |
| 364 | * |
| 365 | * The caller must hold the rtnl_mutex. |
| 366 | */ |
| 367 | int dev_addr_del_multiple(struct net_device *to_dev, |
| 368 | struct net_device *from_dev, |
| 369 | unsigned char addr_type) |
| 370 | { |
| 371 | ASSERT_RTNL(); |
| 372 | |
| 373 | if (from_dev->addr_len != to_dev->addr_len) |
| 374 | return -EINVAL; |
| 375 | __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, |
| 376 | to_dev->addr_len, addr_type); |
| 377 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); |
| 378 | return 0; |
| 379 | } |
| 380 | EXPORT_SYMBOL(dev_addr_del_multiple); |
| 381 | |
| 382 | /* |
| 383 | * Unicast list handling functions |
| 384 | */ |
| 385 | |
| 386 | /** |
| 387 | * dev_uc_add - Add a secondary unicast address |
| 388 | * @dev: device |
| 389 | * @addr: address to add |
| 390 | * |
| 391 | * Add a secondary unicast address to the device or increase |
| 392 | * the reference count if it already exists. |
| 393 | */ |
| 394 | int dev_uc_add(struct net_device *dev, unsigned char *addr) |
| 395 | { |
| 396 | int err; |
| 397 | |
| 398 | netif_addr_lock_bh(dev); |
| 399 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, |
| 400 | NETDEV_HW_ADDR_T_UNICAST); |
| 401 | if (!err) |
| 402 | __dev_set_rx_mode(dev); |
| 403 | netif_addr_unlock_bh(dev); |
| 404 | return err; |
| 405 | } |
| 406 | EXPORT_SYMBOL(dev_uc_add); |
| 407 | |
| 408 | /** |
| 409 | * dev_uc_del - Release secondary unicast address. |
| 410 | * @dev: device |
| 411 | * @addr: address to delete |
| 412 | * |
| 413 | * Release reference to a secondary unicast address and remove it |
| 414 | * from the device if the reference count drops to zero. |
| 415 | */ |
| 416 | int dev_uc_del(struct net_device *dev, unsigned char *addr) |
| 417 | { |
| 418 | int err; |
| 419 | |
| 420 | netif_addr_lock_bh(dev); |
| 421 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, |
| 422 | NETDEV_HW_ADDR_T_UNICAST); |
| 423 | if (!err) |
| 424 | __dev_set_rx_mode(dev); |
| 425 | netif_addr_unlock_bh(dev); |
| 426 | return err; |
| 427 | } |
| 428 | EXPORT_SYMBOL(dev_uc_del); |
| 429 | |
| 430 | /** |
| 431 | * dev_uc_sync - Synchronize device's unicast list to another device |
| 432 | * @to: destination device |
| 433 | * @from: source device |
| 434 | * |
| 435 | * Add newly added addresses to the destination device and release |
| 436 | * addresses that have no users left. The source device must be |
| 437 | * locked by netif_tx_lock_bh. |
| 438 | * |
| 439 | * This function is intended to be called from the dev->set_rx_mode |
| 440 | * function of layered software devices. |
| 441 | */ |
| 442 | int dev_uc_sync(struct net_device *to, struct net_device *from) |
| 443 | { |
| 444 | int err = 0; |
| 445 | |
| 446 | if (to->addr_len != from->addr_len) |
| 447 | return -EINVAL; |
| 448 | |
| 449 | netif_addr_lock_bh(to); |
| 450 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
| 451 | if (!err) |
| 452 | __dev_set_rx_mode(to); |
| 453 | netif_addr_unlock_bh(to); |
| 454 | return err; |
| 455 | } |
| 456 | EXPORT_SYMBOL(dev_uc_sync); |
| 457 | |
| 458 | /** |
| 459 | * dev_uc_unsync - Remove synchronized addresses from the destination device |
| 460 | * @to: destination device |
| 461 | * @from: source device |
| 462 | * |
| 463 | * Remove all addresses that were added to the destination device by |
| 464 | * dev_uc_sync(). This function is intended to be called from the |
| 465 | * dev->stop function of layered software devices. |
| 466 | */ |
| 467 | void dev_uc_unsync(struct net_device *to, struct net_device *from) |
| 468 | { |
| 469 | if (to->addr_len != from->addr_len) |
| 470 | return; |
| 471 | |
| 472 | netif_addr_lock_bh(from); |
| 473 | netif_addr_lock(to); |
| 474 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
| 475 | __dev_set_rx_mode(to); |
| 476 | netif_addr_unlock(to); |
| 477 | netif_addr_unlock_bh(from); |
| 478 | } |
| 479 | EXPORT_SYMBOL(dev_uc_unsync); |
| 480 | |
| 481 | /** |
| 482 | * dev_uc_flush - Flush unicast addresses |
| 483 | * @dev: device |
| 484 | * |
| 485 | * Flush unicast addresses. |
| 486 | */ |
| 487 | void dev_uc_flush(struct net_device *dev) |
| 488 | { |
| 489 | netif_addr_lock_bh(dev); |
| 490 | __hw_addr_flush(&dev->uc); |
| 491 | netif_addr_unlock_bh(dev); |
| 492 | } |
| 493 | EXPORT_SYMBOL(dev_uc_flush); |
| 494 | |
| 495 | /** |
| 496 | * dev_uc_flush - Init unicast address list |
| 497 | * @dev: device |
| 498 | * |
| 499 | * Init unicast address list. |
| 500 | */ |
| 501 | void dev_uc_init(struct net_device *dev) |
| 502 | { |
| 503 | __hw_addr_init(&dev->uc); |
| 504 | } |
| 505 | EXPORT_SYMBOL(dev_uc_init); |
| 506 | |
| 507 | /* |
| 508 | * Multicast list handling functions |
| 509 | */ |
| 510 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 511 | static int __dev_mc_add(struct net_device *dev, unsigned char *addr, |
| 512 | bool global) |
| 513 | { |
| 514 | int err; |
| 515 | |
| 516 | netif_addr_lock_bh(dev); |
| 517 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, |
| 518 | NETDEV_HW_ADDR_T_MULTICAST, global); |
| 519 | if (!err) |
| 520 | __dev_set_rx_mode(dev); |
| 521 | netif_addr_unlock_bh(dev); |
| 522 | return err; |
| 523 | } |
| 524 | /** |
| 525 | * dev_mc_add - Add a multicast address |
| 526 | * @dev: device |
| 527 | * @addr: address to add |
| 528 | * |
| 529 | * Add a multicast address to the device or increase |
| 530 | * the reference count if it already exists. |
| 531 | */ |
| 532 | int dev_mc_add(struct net_device *dev, unsigned char *addr) |
| 533 | { |
| 534 | return __dev_mc_add(dev, addr, false); |
| 535 | } |
| 536 | EXPORT_SYMBOL(dev_mc_add); |
| 537 | |
| 538 | /** |
| 539 | * dev_mc_add_global - Add a global multicast address |
| 540 | * @dev: device |
| 541 | * @addr: address to add |
| 542 | * |
| 543 | * Add a global multicast address to the device. |
| 544 | */ |
| 545 | int dev_mc_add_global(struct net_device *dev, unsigned char *addr) |
| 546 | { |
| 547 | return __dev_mc_add(dev, addr, true); |
| 548 | } |
| 549 | EXPORT_SYMBOL(dev_mc_add_global); |
| 550 | |
| 551 | static int __dev_mc_del(struct net_device *dev, unsigned char *addr, |
| 552 | bool global) |
| 553 | { |
| 554 | int err; |
| 555 | |
| 556 | netif_addr_lock_bh(dev); |
| 557 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, |
| 558 | NETDEV_HW_ADDR_T_MULTICAST, global); |
| 559 | if (!err) |
| 560 | __dev_set_rx_mode(dev); |
| 561 | netif_addr_unlock_bh(dev); |
| 562 | return err; |
| 563 | } |
| 564 | |
| 565 | /** |
| 566 | * dev_mc_del - Delete a multicast address. |
| 567 | * @dev: device |
| 568 | * @addr: address to delete |
| 569 | * |
| 570 | * Release reference to a multicast address and remove it |
| 571 | * from the device if the reference count drops to zero. |
| 572 | */ |
| 573 | int dev_mc_del(struct net_device *dev, unsigned char *addr) |
| 574 | { |
| 575 | return __dev_mc_del(dev, addr, false); |
| 576 | } |
| 577 | EXPORT_SYMBOL(dev_mc_del); |
| 578 | |
| 579 | /** |
| 580 | * dev_mc_del_global - Delete a global multicast address. |
| 581 | * @dev: device |
| 582 | * @addr: address to delete |
| 583 | * |
| 584 | * Release reference to a multicast address and remove it |
| 585 | * from the device if the reference count drops to zero. |
| 586 | */ |
| 587 | int dev_mc_del_global(struct net_device *dev, unsigned char *addr) |
| 588 | { |
| 589 | return __dev_mc_del(dev, addr, true); |
| 590 | } |
| 591 | EXPORT_SYMBOL(dev_mc_del_global); |
| 592 | |
| 593 | /** |
| 594 | * dev_mc_sync - Synchronize device's unicast list to another device |
| 595 | * @to: destination device |
| 596 | * @from: source device |
| 597 | * |
| 598 | * Add newly added addresses to the destination device and release |
| 599 | * addresses that have no users left. The source device must be |
| 600 | * locked by netif_tx_lock_bh. |
| 601 | * |
| 602 | * This function is intended to be called from the dev->set_multicast_list |
| 603 | * or dev->set_rx_mode function of layered software devices. |
| 604 | */ |
| 605 | int dev_mc_sync(struct net_device *to, struct net_device *from) |
| 606 | { |
| 607 | int err = 0; |
| 608 | |
| 609 | if (to->addr_len != from->addr_len) |
| 610 | return -EINVAL; |
| 611 | |
| 612 | netif_addr_lock_bh(to); |
| 613 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
| 614 | if (!err) |
| 615 | __dev_set_rx_mode(to); |
| 616 | netif_addr_unlock_bh(to); |
| 617 | return err; |
| 618 | } |
| 619 | EXPORT_SYMBOL(dev_mc_sync); |
| 620 | |
| 621 | /** |
| 622 | * dev_mc_unsync - Remove synchronized addresses from the destination device |
| 623 | * @to: destination device |
| 624 | * @from: source device |
| 625 | * |
| 626 | * Remove all addresses that were added to the destination device by |
| 627 | * dev_mc_sync(). This function is intended to be called from the |
| 628 | * dev->stop function of layered software devices. |
| 629 | */ |
| 630 | void dev_mc_unsync(struct net_device *to, struct net_device *from) |
| 631 | { |
| 632 | if (to->addr_len != from->addr_len) |
| 633 | return; |
| 634 | |
| 635 | netif_addr_lock_bh(from); |
| 636 | netif_addr_lock(to); |
| 637 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
| 638 | __dev_set_rx_mode(to); |
| 639 | netif_addr_unlock(to); |
| 640 | netif_addr_unlock_bh(from); |
| 641 | } |
| 642 | EXPORT_SYMBOL(dev_mc_unsync); |
| 643 | |
| 644 | /** |
| 645 | * dev_mc_flush - Flush multicast addresses |
| 646 | * @dev: device |
| 647 | * |
| 648 | * Flush multicast addresses. |
| 649 | */ |
| 650 | void dev_mc_flush(struct net_device *dev) |
| 651 | { |
| 652 | netif_addr_lock_bh(dev); |
| 653 | __hw_addr_flush(&dev->mc); |
| 654 | netif_addr_unlock_bh(dev); |
| 655 | } |
| 656 | EXPORT_SYMBOL(dev_mc_flush); |
| 657 | |
| 658 | /** |
| 659 | * dev_mc_flush - Init multicast address list |
| 660 | * @dev: device |
| 661 | * |
| 662 | * Init multicast address list. |
| 663 | */ |
| 664 | void dev_mc_init(struct net_device *dev) |
| 665 | { |
| 666 | __hw_addr_init(&dev->mc); |
| 667 | } |
| 668 | EXPORT_SYMBOL(dev_mc_init); |
| 669 | |
| 670 | #ifdef CONFIG_PROC_FS |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 671 | #include <linux/seq_file.h> |
| 672 | |
| 673 | static int dev_mc_seq_show(struct seq_file *seq, void *v) |
| 674 | { |
| 675 | struct netdev_hw_addr *ha; |
| 676 | struct net_device *dev = v; |
| 677 | |
| 678 | if (v == SEQ_START_TOKEN) |
| 679 | return 0; |
| 680 | |
| 681 | netif_addr_lock_bh(dev); |
| 682 | netdev_for_each_mc_addr(ha, dev) { |
| 683 | int i; |
| 684 | |
| 685 | seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, |
| 686 | dev->name, ha->refcount, ha->global_use); |
| 687 | |
| 688 | for (i = 0; i < dev->addr_len; i++) |
| 689 | seq_printf(seq, "%02x", ha->addr[i]); |
| 690 | |
| 691 | seq_putc(seq, '\n'); |
| 692 | } |
| 693 | netif_addr_unlock_bh(dev); |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | static const struct seq_operations dev_mc_seq_ops = { |
| 698 | .start = dev_seq_start, |
| 699 | .next = dev_seq_next, |
| 700 | .stop = dev_seq_stop, |
| 701 | .show = dev_mc_seq_show, |
| 702 | }; |
| 703 | |
| 704 | static int dev_mc_seq_open(struct inode *inode, struct file *file) |
| 705 | { |
| 706 | return seq_open_net(inode, file, &dev_mc_seq_ops, |
| 707 | sizeof(struct seq_net_private)); |
| 708 | } |
| 709 | |
| 710 | static const struct file_operations dev_mc_seq_fops = { |
| 711 | .owner = THIS_MODULE, |
| 712 | .open = dev_mc_seq_open, |
| 713 | .read = seq_read, |
| 714 | .llseek = seq_lseek, |
| 715 | .release = seq_release_net, |
| 716 | }; |
| 717 | |
| 718 | #endif |
| 719 | |
| 720 | static int __net_init dev_mc_net_init(struct net *net) |
| 721 | { |
| 722 | if (!proc_net_fops_create(net, "dev_mcast", 0, &dev_mc_seq_fops)) |
| 723 | return -ENOMEM; |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | static void __net_exit dev_mc_net_exit(struct net *net) |
| 728 | { |
| 729 | proc_net_remove(net, "dev_mcast"); |
| 730 | } |
| 731 | |
| 732 | static struct pernet_operations __net_initdata dev_mc_net_ops = { |
| 733 | .init = dev_mc_net_init, |
| 734 | .exit = dev_mc_net_exit, |
| 735 | }; |
| 736 | |
| 737 | void __init dev_mcast_init(void) |
| 738 | { |
| 739 | register_pernet_subsys(&dev_mc_net_ops); |
| 740 | } |
| 741 | |