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> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 16 | #include <linux/export.h> |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 17 | #include <linux/list.h> |
| 18 | |
| 19 | /* |
| 20 | * General list handling functions |
| 21 | */ |
| 22 | |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 23 | static int __hw_addr_create_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 24 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 25 | unsigned char addr_type, bool global, |
| 26 | bool sync) |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 27 | { |
| 28 | struct netdev_hw_addr *ha; |
| 29 | int alloc_size; |
| 30 | |
| 31 | alloc_size = sizeof(*ha); |
| 32 | if (alloc_size < L1_CACHE_BYTES) |
| 33 | alloc_size = L1_CACHE_BYTES; |
| 34 | ha = kmalloc(alloc_size, GFP_ATOMIC); |
| 35 | if (!ha) |
| 36 | return -ENOMEM; |
| 37 | memcpy(ha->addr, addr, addr_len); |
| 38 | ha->type = addr_type; |
| 39 | ha->refcount = 1; |
| 40 | ha->global_use = global; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 41 | ha->synced = sync; |
Jay Vosburgh | 9747ba6 | 2013-05-31 11:57:26 +0000 | [diff] [blame] | 42 | ha->sync_cnt = 0; |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 43 | list_add_tail_rcu(&ha->list, &list->list); |
| 44 | list->count++; |
| 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 49 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 50 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 51 | unsigned char addr_type, bool global, bool sync) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 52 | { |
| 53 | struct netdev_hw_addr *ha; |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 54 | |
| 55 | if (addr_len > MAX_ADDR_LEN) |
| 56 | return -EINVAL; |
| 57 | |
| 58 | list_for_each_entry(ha, &list->list, list) { |
| 59 | if (!memcmp(ha->addr, addr, addr_len) && |
| 60 | ha->type == addr_type) { |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 61 | if (global) { |
| 62 | /* check if addr is already used as global */ |
| 63 | if (ha->global_use) |
| 64 | return 0; |
| 65 | else |
| 66 | ha->global_use = true; |
| 67 | } |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 68 | if (sync) { |
| 69 | if (ha->synced) |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 70 | return -EEXIST; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 71 | else |
| 72 | ha->synced = true; |
| 73 | } |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 74 | ha->refcount++; |
| 75 | return 0; |
| 76 | } |
| 77 | } |
| 78 | |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 79 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global, |
| 80 | sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 81 | } |
| 82 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 83 | static int __hw_addr_add(struct netdev_hw_addr_list *list, |
| 84 | const unsigned char *addr, int addr_len, |
| 85 | unsigned char addr_type) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 86 | { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 87 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false, false); |
| 88 | } |
| 89 | |
| 90 | static int __hw_addr_del_entry(struct netdev_hw_addr_list *list, |
| 91 | struct netdev_hw_addr *ha, bool global, |
| 92 | bool sync) |
| 93 | { |
| 94 | if (global && !ha->global_use) |
| 95 | return -ENOENT; |
| 96 | |
| 97 | if (sync && !ha->synced) |
| 98 | return -ENOENT; |
| 99 | |
| 100 | if (global) |
| 101 | ha->global_use = false; |
| 102 | |
| 103 | if (sync) |
| 104 | ha->synced = false; |
| 105 | |
| 106 | if (--ha->refcount) |
| 107 | return 0; |
| 108 | list_del_rcu(&ha->list); |
| 109 | kfree_rcu(ha, rcu_head); |
| 110 | list->count--; |
| 111 | return 0; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 112 | } |
| 113 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 114 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 115 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 116 | unsigned char addr_type, bool global, bool sync) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 117 | { |
| 118 | struct netdev_hw_addr *ha; |
| 119 | |
| 120 | list_for_each_entry(ha, &list->list, list) { |
| 121 | if (!memcmp(ha->addr, addr, addr_len) && |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 122 | (ha->type == addr_type || !addr_type)) |
| 123 | return __hw_addr_del_entry(list, ha, global, sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 124 | } |
| 125 | return -ENOENT; |
| 126 | } |
| 127 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 128 | static int __hw_addr_del(struct netdev_hw_addr_list *list, |
| 129 | const unsigned char *addr, int addr_len, |
| 130 | unsigned char addr_type) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 131 | { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 132 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false, false); |
| 133 | } |
| 134 | |
| 135 | static int __hw_addr_sync_one(struct netdev_hw_addr_list *to_list, |
| 136 | struct netdev_hw_addr *ha, |
| 137 | int addr_len) |
| 138 | { |
| 139 | int err; |
| 140 | |
| 141 | err = __hw_addr_add_ex(to_list, ha->addr, addr_len, ha->type, |
| 142 | false, true); |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 143 | if (err && err != -EEXIST) |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 144 | return err; |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 145 | |
| 146 | if (!err) { |
| 147 | ha->sync_cnt++; |
| 148 | ha->refcount++; |
| 149 | } |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list, |
| 155 | struct netdev_hw_addr_list *from_list, |
| 156 | struct netdev_hw_addr *ha, |
| 157 | int addr_len) |
| 158 | { |
| 159 | int err; |
| 160 | |
| 161 | err = __hw_addr_del_ex(to_list, ha->addr, addr_len, ha->type, |
| 162 | false, true); |
| 163 | if (err) |
| 164 | return; |
| 165 | ha->sync_cnt--; |
Jay Vosburgh | 60ba834 | 2013-05-31 11:57:27 +0000 | [diff] [blame] | 166 | /* address on from list is not marked synced */ |
| 167 | __hw_addr_del_entry(from_list, ha, false, false); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, |
| 171 | struct netdev_hw_addr_list *from_list, |
| 172 | int addr_len) |
| 173 | { |
| 174 | int err = 0; |
| 175 | struct netdev_hw_addr *ha, *tmp; |
| 176 | |
| 177 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
| 178 | if (ha->sync_cnt == ha->refcount) { |
| 179 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
| 180 | } else { |
| 181 | err = __hw_addr_sync_one(to_list, ha, addr_len); |
| 182 | if (err) |
| 183 | break; |
| 184 | } |
| 185 | } |
| 186 | return err; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, |
| 190 | struct netdev_hw_addr_list *from_list, |
| 191 | int addr_len, unsigned char addr_type) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 192 | { |
| 193 | int err; |
| 194 | struct netdev_hw_addr *ha, *ha2; |
| 195 | unsigned char type; |
| 196 | |
| 197 | list_for_each_entry(ha, &from_list->list, list) { |
| 198 | type = addr_type ? addr_type : ha->type; |
| 199 | err = __hw_addr_add(to_list, ha->addr, addr_len, type); |
| 200 | if (err) |
| 201 | goto unroll; |
| 202 | } |
| 203 | return 0; |
| 204 | |
| 205 | unroll: |
| 206 | list_for_each_entry(ha2, &from_list->list, list) { |
| 207 | if (ha2 == ha) |
| 208 | break; |
| 209 | type = addr_type ? addr_type : ha2->type; |
| 210 | __hw_addr_del(to_list, ha2->addr, addr_len, type); |
| 211 | } |
| 212 | return err; |
| 213 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 214 | EXPORT_SYMBOL(__hw_addr_add_multiple); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 215 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 216 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
| 217 | struct netdev_hw_addr_list *from_list, |
| 218 | int addr_len, unsigned char addr_type) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 219 | { |
| 220 | struct netdev_hw_addr *ha; |
| 221 | unsigned char type; |
| 222 | |
| 223 | list_for_each_entry(ha, &from_list->list, list) { |
| 224 | type = addr_type ? addr_type : ha->type; |
Hagen Paul Pfeifer | 5aca1a9 | 2011-02-25 13:58:54 -0800 | [diff] [blame] | 225 | __hw_addr_del(to_list, ha->addr, addr_len, type); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 226 | } |
| 227 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 228 | EXPORT_SYMBOL(__hw_addr_del_multiple); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 229 | |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 230 | /* This function only works where there is a strict 1-1 relationship |
| 231 | * between source and destionation of they synch. If you ever need to |
| 232 | * sync addresses to more then 1 destination, you need to use |
| 233 | * __hw_addr_sync_multiple(). |
| 234 | */ |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 235 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| 236 | struct netdev_hw_addr_list *from_list, |
| 237 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 238 | { |
| 239 | int err = 0; |
| 240 | struct netdev_hw_addr *ha, *tmp; |
| 241 | |
| 242 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 243 | if (!ha->sync_cnt) { |
| 244 | err = __hw_addr_sync_one(to_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 245 | if (err) |
| 246 | break; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 247 | } else if (ha->refcount == 1) |
| 248 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 249 | } |
| 250 | return err; |
| 251 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 252 | EXPORT_SYMBOL(__hw_addr_sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 253 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 254 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| 255 | struct netdev_hw_addr_list *from_list, |
| 256 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 257 | { |
| 258 | struct netdev_hw_addr *ha, *tmp; |
| 259 | |
| 260 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 261 | if (ha->sync_cnt) |
| 262 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 263 | } |
| 264 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 265 | EXPORT_SYMBOL(__hw_addr_unsync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 266 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 267 | void __hw_addr_flush(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 268 | { |
| 269 | struct netdev_hw_addr *ha, *tmp; |
| 270 | |
| 271 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 272 | list_del_rcu(&ha->list); |
Lai Jiangshan | 217f186 | 2011-03-15 18:08:58 +0800 | [diff] [blame] | 273 | kfree_rcu(ha, rcu_head); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 274 | } |
| 275 | list->count = 0; |
| 276 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 277 | EXPORT_SYMBOL(__hw_addr_flush); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 278 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 279 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 280 | { |
| 281 | INIT_LIST_HEAD(&list->list); |
| 282 | list->count = 0; |
| 283 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 284 | EXPORT_SYMBOL(__hw_addr_init); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 285 | |
| 286 | /* |
| 287 | * Device addresses handling functions |
| 288 | */ |
| 289 | |
| 290 | /** |
| 291 | * dev_addr_flush - Flush device address list |
| 292 | * @dev: device |
| 293 | * |
| 294 | * Flush device address list and reset ->dev_addr. |
| 295 | * |
| 296 | * The caller must hold the rtnl_mutex. |
| 297 | */ |
| 298 | void dev_addr_flush(struct net_device *dev) |
| 299 | { |
| 300 | /* rtnl_mutex must be held here */ |
| 301 | |
| 302 | __hw_addr_flush(&dev->dev_addrs); |
| 303 | dev->dev_addr = NULL; |
| 304 | } |
| 305 | EXPORT_SYMBOL(dev_addr_flush); |
| 306 | |
| 307 | /** |
| 308 | * dev_addr_init - Init device address list |
| 309 | * @dev: device |
| 310 | * |
| 311 | * Init device address list and create the first element, |
| 312 | * used by ->dev_addr. |
| 313 | * |
| 314 | * The caller must hold the rtnl_mutex. |
| 315 | */ |
| 316 | int dev_addr_init(struct net_device *dev) |
| 317 | { |
| 318 | unsigned char addr[MAX_ADDR_LEN]; |
| 319 | struct netdev_hw_addr *ha; |
| 320 | int err; |
| 321 | |
| 322 | /* rtnl_mutex must be held here */ |
| 323 | |
| 324 | __hw_addr_init(&dev->dev_addrs); |
| 325 | memset(addr, 0, sizeof(addr)); |
| 326 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), |
| 327 | NETDEV_HW_ADDR_T_LAN); |
| 328 | if (!err) { |
| 329 | /* |
| 330 | * Get the first (previously created) address from the list |
| 331 | * and set dev_addr pointer to this location. |
| 332 | */ |
| 333 | ha = list_first_entry(&dev->dev_addrs.list, |
| 334 | struct netdev_hw_addr, list); |
| 335 | dev->dev_addr = ha->addr; |
| 336 | } |
| 337 | return err; |
| 338 | } |
| 339 | EXPORT_SYMBOL(dev_addr_init); |
| 340 | |
| 341 | /** |
| 342 | * dev_addr_add - Add a device address |
| 343 | * @dev: device |
| 344 | * @addr: address to add |
| 345 | * @addr_type: address type |
| 346 | * |
| 347 | * Add a device address to the device or increase the reference count if |
| 348 | * it already exists. |
| 349 | * |
| 350 | * The caller must hold the rtnl_mutex. |
| 351 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 352 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 353 | unsigned char addr_type) |
| 354 | { |
| 355 | int err; |
| 356 | |
| 357 | ASSERT_RTNL(); |
| 358 | |
| 359 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); |
| 360 | if (!err) |
| 361 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 362 | return err; |
| 363 | } |
| 364 | EXPORT_SYMBOL(dev_addr_add); |
| 365 | |
| 366 | /** |
| 367 | * dev_addr_del - Release a device address. |
| 368 | * @dev: device |
| 369 | * @addr: address to delete |
| 370 | * @addr_type: address type |
| 371 | * |
| 372 | * Release reference to a device address and remove it from the device |
| 373 | * if the reference count drops to zero. |
| 374 | * |
| 375 | * The caller must hold the rtnl_mutex. |
| 376 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 377 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 378 | unsigned char addr_type) |
| 379 | { |
| 380 | int err; |
| 381 | struct netdev_hw_addr *ha; |
| 382 | |
| 383 | ASSERT_RTNL(); |
| 384 | |
| 385 | /* |
| 386 | * We can not remove the first address from the list because |
| 387 | * dev->dev_addr points to that. |
| 388 | */ |
| 389 | ha = list_first_entry(&dev->dev_addrs.list, |
| 390 | struct netdev_hw_addr, list); |
Jiri Pirko | a652208 | 2012-11-14 02:51:04 +0000 | [diff] [blame] | 391 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 392 | ha->type == addr_type && ha->refcount == 1) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 393 | return -ENOENT; |
| 394 | |
| 395 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, |
| 396 | addr_type); |
| 397 | if (!err) |
| 398 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 399 | return err; |
| 400 | } |
| 401 | EXPORT_SYMBOL(dev_addr_del); |
| 402 | |
| 403 | /** |
| 404 | * dev_addr_add_multiple - Add device addresses from another device |
| 405 | * @to_dev: device to which addresses will be added |
| 406 | * @from_dev: device from which addresses will be added |
| 407 | * @addr_type: address type - 0 means type will be used from from_dev |
| 408 | * |
| 409 | * Add device addresses of the one device to another. |
| 410 | ** |
| 411 | * The caller must hold the rtnl_mutex. |
| 412 | */ |
| 413 | int dev_addr_add_multiple(struct net_device *to_dev, |
| 414 | struct net_device *from_dev, |
| 415 | unsigned char addr_type) |
| 416 | { |
| 417 | int err; |
| 418 | |
| 419 | ASSERT_RTNL(); |
| 420 | |
| 421 | if (from_dev->addr_len != to_dev->addr_len) |
| 422 | return -EINVAL; |
| 423 | err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, |
| 424 | to_dev->addr_len, addr_type); |
| 425 | if (!err) |
| 426 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); |
| 427 | return err; |
| 428 | } |
| 429 | EXPORT_SYMBOL(dev_addr_add_multiple); |
| 430 | |
| 431 | /** |
| 432 | * dev_addr_del_multiple - Delete device addresses by another device |
| 433 | * @to_dev: device where the addresses will be deleted |
Gilles Espinasse | 177b241 | 2011-01-09 08:59:49 +0100 | [diff] [blame] | 434 | * @from_dev: device supplying the addresses to be deleted |
| 435 | * @addr_type: address type - 0 means type will be used from from_dev |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 436 | * |
| 437 | * Deletes addresses in to device by the list of addresses in from device. |
| 438 | * |
| 439 | * The caller must hold the rtnl_mutex. |
| 440 | */ |
| 441 | int dev_addr_del_multiple(struct net_device *to_dev, |
| 442 | struct net_device *from_dev, |
| 443 | unsigned char addr_type) |
| 444 | { |
| 445 | ASSERT_RTNL(); |
| 446 | |
| 447 | if (from_dev->addr_len != to_dev->addr_len) |
| 448 | return -EINVAL; |
| 449 | __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, |
| 450 | to_dev->addr_len, addr_type); |
| 451 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); |
| 452 | return 0; |
| 453 | } |
| 454 | EXPORT_SYMBOL(dev_addr_del_multiple); |
| 455 | |
| 456 | /* |
| 457 | * Unicast list handling functions |
| 458 | */ |
| 459 | |
| 460 | /** |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 461 | * dev_uc_add_excl - Add a global secondary unicast address |
| 462 | * @dev: device |
| 463 | * @addr: address to add |
| 464 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 465 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr) |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 466 | { |
| 467 | struct netdev_hw_addr *ha; |
| 468 | int err; |
| 469 | |
| 470 | netif_addr_lock_bh(dev); |
| 471 | list_for_each_entry(ha, &dev->uc.list, list) { |
| 472 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 473 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { |
| 474 | err = -EEXIST; |
| 475 | goto out; |
| 476 | } |
| 477 | } |
| 478 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 479 | NETDEV_HW_ADDR_T_UNICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 480 | if (!err) |
| 481 | __dev_set_rx_mode(dev); |
| 482 | out: |
| 483 | netif_addr_unlock_bh(dev); |
| 484 | return err; |
| 485 | } |
| 486 | EXPORT_SYMBOL(dev_uc_add_excl); |
| 487 | |
| 488 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 489 | * dev_uc_add - Add a secondary unicast address |
| 490 | * @dev: device |
| 491 | * @addr: address to add |
| 492 | * |
| 493 | * Add a secondary unicast address to the device or increase |
| 494 | * the reference count if it already exists. |
| 495 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 496 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 497 | { |
| 498 | int err; |
| 499 | |
| 500 | netif_addr_lock_bh(dev); |
| 501 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, |
| 502 | NETDEV_HW_ADDR_T_UNICAST); |
| 503 | if (!err) |
| 504 | __dev_set_rx_mode(dev); |
| 505 | netif_addr_unlock_bh(dev); |
| 506 | return err; |
| 507 | } |
| 508 | EXPORT_SYMBOL(dev_uc_add); |
| 509 | |
| 510 | /** |
| 511 | * dev_uc_del - Release secondary unicast address. |
| 512 | * @dev: device |
| 513 | * @addr: address to delete |
| 514 | * |
| 515 | * Release reference to a secondary unicast address and remove it |
| 516 | * from the device if the reference count drops to zero. |
| 517 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 518 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 519 | { |
| 520 | int err; |
| 521 | |
| 522 | netif_addr_lock_bh(dev); |
| 523 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, |
| 524 | NETDEV_HW_ADDR_T_UNICAST); |
| 525 | if (!err) |
| 526 | __dev_set_rx_mode(dev); |
| 527 | netif_addr_unlock_bh(dev); |
| 528 | return err; |
| 529 | } |
| 530 | EXPORT_SYMBOL(dev_uc_del); |
| 531 | |
| 532 | /** |
| 533 | * dev_uc_sync - Synchronize device's unicast list to another device |
| 534 | * @to: destination device |
| 535 | * @from: source device |
| 536 | * |
| 537 | * Add newly added addresses to the destination device and release |
| 538 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 539 | * locked by netif_addr_lock_bh. |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 540 | * |
| 541 | * This function is intended to be called from the dev->set_rx_mode |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 542 | * function of layered software devices. This function assumes that |
| 543 | * addresses will only ever be synced to the @to devices and no other. |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 544 | */ |
| 545 | int dev_uc_sync(struct net_device *to, struct net_device *from) |
| 546 | { |
| 547 | int err = 0; |
| 548 | |
| 549 | if (to->addr_len != from->addr_len) |
| 550 | return -EINVAL; |
| 551 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 552 | netif_addr_lock_nested(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 553 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
| 554 | if (!err) |
| 555 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 556 | netif_addr_unlock(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 557 | return err; |
| 558 | } |
| 559 | EXPORT_SYMBOL(dev_uc_sync); |
| 560 | |
| 561 | /** |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 562 | * dev_uc_sync_multiple - Synchronize device's unicast list to another |
| 563 | * device, but allow for multiple calls to sync to multiple devices. |
| 564 | * @to: destination device |
| 565 | * @from: source device |
| 566 | * |
| 567 | * Add newly added addresses to the destination device and release |
| 568 | * addresses that have been deleted from the source. The source device |
| 569 | * must be locked by netif_addr_lock_bh. |
| 570 | * |
| 571 | * This function is intended to be called from the dev->set_rx_mode |
| 572 | * function of layered software devices. It allows for a single source |
| 573 | * device to be synced to multiple destination devices. |
| 574 | */ |
| 575 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from) |
| 576 | { |
| 577 | int err = 0; |
| 578 | |
| 579 | if (to->addr_len != from->addr_len) |
| 580 | return -EINVAL; |
| 581 | |
| 582 | netif_addr_lock_nested(to); |
| 583 | err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len); |
| 584 | if (!err) |
| 585 | __dev_set_rx_mode(to); |
| 586 | netif_addr_unlock(to); |
| 587 | return err; |
| 588 | } |
| 589 | EXPORT_SYMBOL(dev_uc_sync_multiple); |
| 590 | |
| 591 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 592 | * dev_uc_unsync - Remove synchronized addresses from the destination device |
| 593 | * @to: destination device |
| 594 | * @from: source device |
| 595 | * |
| 596 | * Remove all addresses that were added to the destination device by |
| 597 | * dev_uc_sync(). This function is intended to be called from the |
| 598 | * dev->stop function of layered software devices. |
| 599 | */ |
| 600 | void dev_uc_unsync(struct net_device *to, struct net_device *from) |
| 601 | { |
| 602 | if (to->addr_len != from->addr_len) |
| 603 | return; |
| 604 | |
| 605 | netif_addr_lock_bh(from); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 606 | netif_addr_lock_nested(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 607 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
| 608 | __dev_set_rx_mode(to); |
| 609 | netif_addr_unlock(to); |
| 610 | netif_addr_unlock_bh(from); |
| 611 | } |
| 612 | EXPORT_SYMBOL(dev_uc_unsync); |
| 613 | |
| 614 | /** |
| 615 | * dev_uc_flush - Flush unicast addresses |
| 616 | * @dev: device |
| 617 | * |
| 618 | * Flush unicast addresses. |
| 619 | */ |
| 620 | void dev_uc_flush(struct net_device *dev) |
| 621 | { |
| 622 | netif_addr_lock_bh(dev); |
| 623 | __hw_addr_flush(&dev->uc); |
| 624 | netif_addr_unlock_bh(dev); |
| 625 | } |
| 626 | EXPORT_SYMBOL(dev_uc_flush); |
| 627 | |
| 628 | /** |
| 629 | * dev_uc_flush - Init unicast address list |
| 630 | * @dev: device |
| 631 | * |
| 632 | * Init unicast address list. |
| 633 | */ |
| 634 | void dev_uc_init(struct net_device *dev) |
| 635 | { |
| 636 | __hw_addr_init(&dev->uc); |
| 637 | } |
| 638 | EXPORT_SYMBOL(dev_uc_init); |
| 639 | |
| 640 | /* |
| 641 | * Multicast list handling functions |
| 642 | */ |
| 643 | |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 644 | /** |
| 645 | * dev_mc_add_excl - Add a global secondary multicast address |
| 646 | * @dev: device |
| 647 | * @addr: address to add |
| 648 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 649 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr) |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 650 | { |
| 651 | struct netdev_hw_addr *ha; |
| 652 | int err; |
| 653 | |
| 654 | netif_addr_lock_bh(dev); |
| 655 | list_for_each_entry(ha, &dev->mc.list, list) { |
| 656 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 657 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { |
| 658 | err = -EEXIST; |
| 659 | goto out; |
| 660 | } |
| 661 | } |
| 662 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 663 | NETDEV_HW_ADDR_T_MULTICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 664 | if (!err) |
| 665 | __dev_set_rx_mode(dev); |
| 666 | out: |
| 667 | netif_addr_unlock_bh(dev); |
| 668 | return err; |
| 669 | } |
| 670 | EXPORT_SYMBOL(dev_mc_add_excl); |
| 671 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 672 | static int __dev_mc_add(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 673 | bool global) |
| 674 | { |
| 675 | int err; |
| 676 | |
| 677 | netif_addr_lock_bh(dev); |
| 678 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 679 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 680 | if (!err) |
| 681 | __dev_set_rx_mode(dev); |
| 682 | netif_addr_unlock_bh(dev); |
| 683 | return err; |
| 684 | } |
| 685 | /** |
| 686 | * dev_mc_add - Add a multicast address |
| 687 | * @dev: device |
| 688 | * @addr: address to add |
| 689 | * |
| 690 | * Add a multicast address to the device or increase |
| 691 | * the reference count if it already exists. |
| 692 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 693 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 694 | { |
| 695 | return __dev_mc_add(dev, addr, false); |
| 696 | } |
| 697 | EXPORT_SYMBOL(dev_mc_add); |
| 698 | |
| 699 | /** |
| 700 | * dev_mc_add_global - Add a global multicast address |
| 701 | * @dev: device |
| 702 | * @addr: address to add |
| 703 | * |
| 704 | * Add a global multicast address to the device. |
| 705 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 706 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 707 | { |
| 708 | return __dev_mc_add(dev, addr, true); |
| 709 | } |
| 710 | EXPORT_SYMBOL(dev_mc_add_global); |
| 711 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 712 | static int __dev_mc_del(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 713 | bool global) |
| 714 | { |
| 715 | int err; |
| 716 | |
| 717 | netif_addr_lock_bh(dev); |
| 718 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 719 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 720 | if (!err) |
| 721 | __dev_set_rx_mode(dev); |
| 722 | netif_addr_unlock_bh(dev); |
| 723 | return err; |
| 724 | } |
| 725 | |
| 726 | /** |
| 727 | * dev_mc_del - Delete a multicast address. |
| 728 | * @dev: device |
| 729 | * @addr: address to delete |
| 730 | * |
| 731 | * Release reference to a multicast address and remove it |
| 732 | * from the device if the reference count drops to zero. |
| 733 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 734 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 735 | { |
| 736 | return __dev_mc_del(dev, addr, false); |
| 737 | } |
| 738 | EXPORT_SYMBOL(dev_mc_del); |
| 739 | |
| 740 | /** |
| 741 | * dev_mc_del_global - Delete a global multicast address. |
| 742 | * @dev: device |
| 743 | * @addr: address to delete |
| 744 | * |
| 745 | * Release reference to a multicast address and remove it |
| 746 | * from the device if the reference count drops to zero. |
| 747 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 748 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 749 | { |
| 750 | return __dev_mc_del(dev, addr, true); |
| 751 | } |
| 752 | EXPORT_SYMBOL(dev_mc_del_global); |
| 753 | |
| 754 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 755 | * dev_mc_sync - Synchronize device's multicast list to another device |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 756 | * @to: destination device |
| 757 | * @from: source device |
| 758 | * |
| 759 | * Add newly added addresses to the destination device and release |
| 760 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 761 | * locked by netif_addr_lock_bh. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 762 | * |
Jiri Pirko | b81693d | 2011-08-16 06:29:02 +0000 | [diff] [blame] | 763 | * This function is intended to be called from the ndo_set_rx_mode |
| 764 | * function of layered software devices. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 765 | */ |
| 766 | int dev_mc_sync(struct net_device *to, struct net_device *from) |
| 767 | { |
| 768 | int err = 0; |
| 769 | |
| 770 | if (to->addr_len != from->addr_len) |
| 771 | return -EINVAL; |
| 772 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 773 | netif_addr_lock_nested(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 774 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
| 775 | if (!err) |
| 776 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 777 | netif_addr_unlock(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 778 | return err; |
| 779 | } |
| 780 | EXPORT_SYMBOL(dev_mc_sync); |
| 781 | |
| 782 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 783 | * dev_mc_sync_multiple - Synchronize device's multicast list to another |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 784 | * device, but allow for multiple calls to sync to multiple devices. |
| 785 | * @to: destination device |
| 786 | * @from: source device |
| 787 | * |
| 788 | * Add newly added addresses to the destination device and release |
| 789 | * addresses that have no users left. The source device must be |
| 790 | * locked by netif_addr_lock_bh. |
| 791 | * |
| 792 | * This function is intended to be called from the ndo_set_rx_mode |
| 793 | * function of layered software devices. It allows for a single |
| 794 | * source device to be synced to multiple destination devices. |
| 795 | */ |
| 796 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from) |
| 797 | { |
| 798 | int err = 0; |
| 799 | |
| 800 | if (to->addr_len != from->addr_len) |
| 801 | return -EINVAL; |
| 802 | |
| 803 | netif_addr_lock_nested(to); |
Jay Vosburgh | b190a50 | 2013-05-31 11:57:29 +0000 | [diff] [blame] | 804 | err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 805 | if (!err) |
| 806 | __dev_set_rx_mode(to); |
| 807 | netif_addr_unlock(to); |
| 808 | return err; |
| 809 | } |
| 810 | EXPORT_SYMBOL(dev_mc_sync_multiple); |
| 811 | |
| 812 | /** |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 813 | * dev_mc_unsync - Remove synchronized addresses from the destination device |
| 814 | * @to: destination device |
| 815 | * @from: source device |
| 816 | * |
| 817 | * Remove all addresses that were added to the destination device by |
| 818 | * dev_mc_sync(). This function is intended to be called from the |
| 819 | * dev->stop function of layered software devices. |
| 820 | */ |
| 821 | void dev_mc_unsync(struct net_device *to, struct net_device *from) |
| 822 | { |
| 823 | if (to->addr_len != from->addr_len) |
| 824 | return; |
| 825 | |
| 826 | netif_addr_lock_bh(from); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 827 | netif_addr_lock_nested(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 828 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
| 829 | __dev_set_rx_mode(to); |
| 830 | netif_addr_unlock(to); |
| 831 | netif_addr_unlock_bh(from); |
| 832 | } |
| 833 | EXPORT_SYMBOL(dev_mc_unsync); |
| 834 | |
| 835 | /** |
| 836 | * dev_mc_flush - Flush multicast addresses |
| 837 | * @dev: device |
| 838 | * |
| 839 | * Flush multicast addresses. |
| 840 | */ |
| 841 | void dev_mc_flush(struct net_device *dev) |
| 842 | { |
| 843 | netif_addr_lock_bh(dev); |
| 844 | __hw_addr_flush(&dev->mc); |
| 845 | netif_addr_unlock_bh(dev); |
| 846 | } |
| 847 | EXPORT_SYMBOL(dev_mc_flush); |
| 848 | |
| 849 | /** |
| 850 | * dev_mc_flush - Init multicast address list |
| 851 | * @dev: device |
| 852 | * |
| 853 | * Init multicast address list. |
| 854 | */ |
| 855 | void dev_mc_init(struct net_device *dev) |
| 856 | { |
| 857 | __hw_addr_init(&dev->mc); |
| 858 | } |
| 859 | EXPORT_SYMBOL(dev_mc_init); |