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 | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 41 | ha->synced = sync ? 1 : 0; |
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 | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 51 | unsigned char addr_type, bool global, bool sync, |
| 52 | int sync_count) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 53 | { |
| 54 | struct netdev_hw_addr *ha; |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 55 | |
| 56 | if (addr_len > MAX_ADDR_LEN) |
| 57 | return -EINVAL; |
| 58 | |
| 59 | list_for_each_entry(ha, &list->list, list) { |
| 60 | if (!memcmp(ha->addr, addr, addr_len) && |
| 61 | ha->type == addr_type) { |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 62 | if (global) { |
| 63 | /* check if addr is already used as global */ |
| 64 | if (ha->global_use) |
| 65 | return 0; |
| 66 | else |
| 67 | ha->global_use = true; |
| 68 | } |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 69 | if (sync) { |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 70 | if (ha->synced && sync_count) |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 71 | return -EEXIST; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 72 | else |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 73 | ha->synced++; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 74 | } |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 75 | ha->refcount++; |
| 76 | return 0; |
| 77 | } |
| 78 | } |
| 79 | |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 80 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global, |
| 81 | sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 82 | } |
| 83 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 84 | static int __hw_addr_add(struct netdev_hw_addr_list *list, |
| 85 | const unsigned char *addr, int addr_len, |
| 86 | unsigned char addr_type) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 87 | { |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 88 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false, false, |
| 89 | 0); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static int __hw_addr_del_entry(struct netdev_hw_addr_list *list, |
| 93 | struct netdev_hw_addr *ha, bool global, |
| 94 | bool sync) |
| 95 | { |
| 96 | if (global && !ha->global_use) |
| 97 | return -ENOENT; |
| 98 | |
| 99 | if (sync && !ha->synced) |
| 100 | return -ENOENT; |
| 101 | |
| 102 | if (global) |
| 103 | ha->global_use = false; |
| 104 | |
| 105 | if (sync) |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 106 | ha->synced--; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 107 | |
| 108 | if (--ha->refcount) |
| 109 | return 0; |
| 110 | list_del_rcu(&ha->list); |
| 111 | kfree_rcu(ha, rcu_head); |
| 112 | list->count--; |
| 113 | return 0; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 114 | } |
| 115 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 116 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 117 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 118 | unsigned char addr_type, bool global, bool sync) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 119 | { |
| 120 | struct netdev_hw_addr *ha; |
| 121 | |
| 122 | list_for_each_entry(ha, &list->list, list) { |
| 123 | if (!memcmp(ha->addr, addr, addr_len) && |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 124 | (ha->type == addr_type || !addr_type)) |
| 125 | return __hw_addr_del_entry(list, ha, global, sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 126 | } |
| 127 | return -ENOENT; |
| 128 | } |
| 129 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 130 | static int __hw_addr_del(struct netdev_hw_addr_list *list, |
| 131 | const unsigned char *addr, int addr_len, |
| 132 | unsigned char addr_type) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 133 | { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 134 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false, false); |
| 135 | } |
| 136 | |
| 137 | static int __hw_addr_sync_one(struct netdev_hw_addr_list *to_list, |
| 138 | struct netdev_hw_addr *ha, |
| 139 | int addr_len) |
| 140 | { |
| 141 | int err; |
| 142 | |
| 143 | err = __hw_addr_add_ex(to_list, ha->addr, addr_len, ha->type, |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 144 | false, true, ha->sync_cnt); |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 145 | if (err && err != -EEXIST) |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 146 | return err; |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 147 | |
| 148 | if (!err) { |
| 149 | ha->sync_cnt++; |
| 150 | ha->refcount++; |
| 151 | } |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list, |
| 157 | struct netdev_hw_addr_list *from_list, |
| 158 | struct netdev_hw_addr *ha, |
| 159 | int addr_len) |
| 160 | { |
| 161 | int err; |
| 162 | |
| 163 | err = __hw_addr_del_ex(to_list, ha->addr, addr_len, ha->type, |
| 164 | false, true); |
| 165 | if (err) |
| 166 | return; |
| 167 | ha->sync_cnt--; |
Jay Vosburgh | 60ba834 | 2013-05-31 11:57:27 +0000 | [diff] [blame] | 168 | /* address on from list is not marked synced */ |
| 169 | __hw_addr_del_entry(from_list, ha, false, false); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, |
| 173 | struct netdev_hw_addr_list *from_list, |
| 174 | int addr_len) |
| 175 | { |
| 176 | int err = 0; |
| 177 | struct netdev_hw_addr *ha, *tmp; |
| 178 | |
| 179 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
| 180 | if (ha->sync_cnt == ha->refcount) { |
| 181 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
| 182 | } else { |
| 183 | err = __hw_addr_sync_one(to_list, ha, addr_len); |
| 184 | if (err) |
| 185 | break; |
| 186 | } |
| 187 | } |
| 188 | return err; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 191 | /* This function only works where there is a strict 1-1 relationship |
| 192 | * between source and destionation of they synch. If you ever need to |
| 193 | * sync addresses to more then 1 destination, you need to use |
| 194 | * __hw_addr_sync_multiple(). |
| 195 | */ |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 196 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| 197 | struct netdev_hw_addr_list *from_list, |
| 198 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 199 | { |
| 200 | int err = 0; |
| 201 | struct netdev_hw_addr *ha, *tmp; |
| 202 | |
| 203 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 204 | if (!ha->sync_cnt) { |
| 205 | err = __hw_addr_sync_one(to_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 206 | if (err) |
| 207 | break; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 208 | } else if (ha->refcount == 1) |
| 209 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 210 | } |
| 211 | return err; |
| 212 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 213 | EXPORT_SYMBOL(__hw_addr_sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 214 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 215 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| 216 | struct netdev_hw_addr_list *from_list, |
| 217 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 218 | { |
| 219 | struct netdev_hw_addr *ha, *tmp; |
| 220 | |
| 221 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 222 | if (ha->sync_cnt) |
| 223 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 224 | } |
| 225 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 226 | EXPORT_SYMBOL(__hw_addr_unsync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 227 | |
Alexander Duyck | 670e5b8 | 2014-05-28 18:44:46 -0700 | [diff] [blame] | 228 | /** |
| 229 | * __hw_addr_sync_dev - Synchonize device's multicast list |
| 230 | * @list: address list to syncronize |
| 231 | * @dev: device to sync |
| 232 | * @sync: function to call if address should be added |
| 233 | * @unsync: function to call if address should be removed |
| 234 | * |
| 235 | * This funciton is intended to be called from the ndo_set_rx_mode |
| 236 | * function of devices that require explicit address add/remove |
| 237 | * notifications. The unsync function may be NULL in which case |
| 238 | * the addresses requiring removal will simply be removed without |
| 239 | * any notification to the device. |
| 240 | **/ |
| 241 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
| 242 | struct net_device *dev, |
| 243 | int (*sync)(struct net_device *, const unsigned char *), |
| 244 | int (*unsync)(struct net_device *, |
| 245 | const unsigned char *)) |
| 246 | { |
| 247 | struct netdev_hw_addr *ha, *tmp; |
| 248 | int err; |
| 249 | |
| 250 | /* first go through and flush out any stale entries */ |
| 251 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 252 | if (!ha->sync_cnt || ha->refcount != 1) |
| 253 | continue; |
| 254 | |
| 255 | /* if unsync is defined and fails defer unsyncing address */ |
| 256 | if (unsync && unsync(dev, ha->addr)) |
| 257 | continue; |
| 258 | |
| 259 | ha->sync_cnt--; |
| 260 | __hw_addr_del_entry(list, ha, false, false); |
| 261 | } |
| 262 | |
| 263 | /* go through and sync new entries to the list */ |
| 264 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 265 | if (ha->sync_cnt) |
| 266 | continue; |
| 267 | |
| 268 | err = sync(dev, ha->addr); |
| 269 | if (err) |
| 270 | return err; |
| 271 | |
| 272 | ha->sync_cnt++; |
| 273 | ha->refcount++; |
| 274 | } |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | EXPORT_SYMBOL(__hw_addr_sync_dev); |
| 279 | |
| 280 | /** |
Fabian Frederick | 1d2398d | 2014-11-17 22:04:03 +0100 | [diff] [blame] | 281 | * __hw_addr_unsync_dev - Remove synchronized addresses from device |
| 282 | * @list: address list to remove synchronized addresses from |
Alexander Duyck | 670e5b8 | 2014-05-28 18:44:46 -0700 | [diff] [blame] | 283 | * @dev: device to sync |
| 284 | * @unsync: function to call if address should be removed |
| 285 | * |
| 286 | * Remove all addresses that were added to the device by __hw_addr_sync_dev(). |
| 287 | * This function is intended to be called from the ndo_stop or ndo_open |
| 288 | * functions on devices that require explicit address add/remove |
| 289 | * notifications. If the unsync function pointer is NULL then this function |
| 290 | * can be used to just reset the sync_cnt for the addresses in the list. |
| 291 | **/ |
| 292 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, |
| 293 | struct net_device *dev, |
| 294 | int (*unsync)(struct net_device *, |
| 295 | const unsigned char *)) |
| 296 | { |
| 297 | struct netdev_hw_addr *ha, *tmp; |
| 298 | |
| 299 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 300 | if (!ha->sync_cnt) |
| 301 | continue; |
| 302 | |
| 303 | /* if unsync is defined and fails defer unsyncing address */ |
| 304 | if (unsync && unsync(dev, ha->addr)) |
| 305 | continue; |
| 306 | |
| 307 | ha->sync_cnt--; |
| 308 | __hw_addr_del_entry(list, ha, false, false); |
| 309 | } |
| 310 | } |
| 311 | EXPORT_SYMBOL(__hw_addr_unsync_dev); |
| 312 | |
stephen hemminger | 477bb93 | 2013-12-13 12:35:56 -0800 | [diff] [blame] | 313 | static void __hw_addr_flush(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 314 | { |
| 315 | struct netdev_hw_addr *ha, *tmp; |
| 316 | |
| 317 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 318 | list_del_rcu(&ha->list); |
Lai Jiangshan | 217f186 | 2011-03-15 18:08:58 +0800 | [diff] [blame] | 319 | kfree_rcu(ha, rcu_head); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 320 | } |
| 321 | list->count = 0; |
| 322 | } |
| 323 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 324 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 325 | { |
| 326 | INIT_LIST_HEAD(&list->list); |
| 327 | list->count = 0; |
| 328 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 329 | EXPORT_SYMBOL(__hw_addr_init); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 330 | |
| 331 | /* |
| 332 | * Device addresses handling functions |
| 333 | */ |
| 334 | |
| 335 | /** |
| 336 | * dev_addr_flush - Flush device address list |
| 337 | * @dev: device |
| 338 | * |
| 339 | * Flush device address list and reset ->dev_addr. |
| 340 | * |
| 341 | * The caller must hold the rtnl_mutex. |
| 342 | */ |
| 343 | void dev_addr_flush(struct net_device *dev) |
| 344 | { |
| 345 | /* rtnl_mutex must be held here */ |
| 346 | |
| 347 | __hw_addr_flush(&dev->dev_addrs); |
| 348 | dev->dev_addr = NULL; |
| 349 | } |
| 350 | EXPORT_SYMBOL(dev_addr_flush); |
| 351 | |
| 352 | /** |
| 353 | * dev_addr_init - Init device address list |
| 354 | * @dev: device |
| 355 | * |
| 356 | * Init device address list and create the first element, |
| 357 | * used by ->dev_addr. |
| 358 | * |
| 359 | * The caller must hold the rtnl_mutex. |
| 360 | */ |
| 361 | int dev_addr_init(struct net_device *dev) |
| 362 | { |
| 363 | unsigned char addr[MAX_ADDR_LEN]; |
| 364 | struct netdev_hw_addr *ha; |
| 365 | int err; |
| 366 | |
| 367 | /* rtnl_mutex must be held here */ |
| 368 | |
| 369 | __hw_addr_init(&dev->dev_addrs); |
| 370 | memset(addr, 0, sizeof(addr)); |
| 371 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), |
| 372 | NETDEV_HW_ADDR_T_LAN); |
| 373 | if (!err) { |
| 374 | /* |
| 375 | * Get the first (previously created) address from the list |
| 376 | * and set dev_addr pointer to this location. |
| 377 | */ |
| 378 | ha = list_first_entry(&dev->dev_addrs.list, |
| 379 | struct netdev_hw_addr, list); |
| 380 | dev->dev_addr = ha->addr; |
| 381 | } |
| 382 | return err; |
| 383 | } |
| 384 | EXPORT_SYMBOL(dev_addr_init); |
| 385 | |
| 386 | /** |
| 387 | * dev_addr_add - Add a device address |
| 388 | * @dev: device |
| 389 | * @addr: address to add |
| 390 | * @addr_type: address type |
| 391 | * |
| 392 | * Add a device address to the device or increase the reference count if |
| 393 | * it already exists. |
| 394 | * |
| 395 | * The caller must hold the rtnl_mutex. |
| 396 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 397 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 398 | unsigned char addr_type) |
| 399 | { |
| 400 | int err; |
| 401 | |
| 402 | ASSERT_RTNL(); |
| 403 | |
| 404 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); |
| 405 | if (!err) |
| 406 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 407 | return err; |
| 408 | } |
| 409 | EXPORT_SYMBOL(dev_addr_add); |
| 410 | |
| 411 | /** |
| 412 | * dev_addr_del - Release a device address. |
| 413 | * @dev: device |
| 414 | * @addr: address to delete |
| 415 | * @addr_type: address type |
| 416 | * |
| 417 | * Release reference to a device address and remove it from the device |
| 418 | * if the reference count drops to zero. |
| 419 | * |
| 420 | * The caller must hold the rtnl_mutex. |
| 421 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 422 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 423 | unsigned char addr_type) |
| 424 | { |
| 425 | int err; |
| 426 | struct netdev_hw_addr *ha; |
| 427 | |
| 428 | ASSERT_RTNL(); |
| 429 | |
| 430 | /* |
| 431 | * We can not remove the first address from the list because |
| 432 | * dev->dev_addr points to that. |
| 433 | */ |
| 434 | ha = list_first_entry(&dev->dev_addrs.list, |
| 435 | struct netdev_hw_addr, list); |
Jiri Pirko | a652208 | 2012-11-14 02:51:04 +0000 | [diff] [blame] | 436 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 437 | ha->type == addr_type && ha->refcount == 1) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 438 | return -ENOENT; |
| 439 | |
| 440 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, |
| 441 | addr_type); |
| 442 | if (!err) |
| 443 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 444 | return err; |
| 445 | } |
| 446 | EXPORT_SYMBOL(dev_addr_del); |
| 447 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 448 | /* |
| 449 | * Unicast list handling functions |
| 450 | */ |
| 451 | |
| 452 | /** |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 453 | * dev_uc_add_excl - Add a global secondary unicast address |
| 454 | * @dev: device |
| 455 | * @addr: address to add |
| 456 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 457 | 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] | 458 | { |
| 459 | struct netdev_hw_addr *ha; |
| 460 | int err; |
| 461 | |
| 462 | netif_addr_lock_bh(dev); |
| 463 | list_for_each_entry(ha, &dev->uc.list, list) { |
| 464 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 465 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { |
| 466 | err = -EEXIST; |
| 467 | goto out; |
| 468 | } |
| 469 | } |
| 470 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 471 | NETDEV_HW_ADDR_T_UNICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 472 | if (!err) |
| 473 | __dev_set_rx_mode(dev); |
| 474 | out: |
| 475 | netif_addr_unlock_bh(dev); |
| 476 | return err; |
| 477 | } |
| 478 | EXPORT_SYMBOL(dev_uc_add_excl); |
| 479 | |
| 480 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 481 | * dev_uc_add - Add a secondary unicast address |
| 482 | * @dev: device |
| 483 | * @addr: address to add |
| 484 | * |
| 485 | * Add a secondary unicast address to the device or increase |
| 486 | * the reference count if it already exists. |
| 487 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 488 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 489 | { |
| 490 | int err; |
| 491 | |
| 492 | netif_addr_lock_bh(dev); |
| 493 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, |
| 494 | NETDEV_HW_ADDR_T_UNICAST); |
| 495 | if (!err) |
| 496 | __dev_set_rx_mode(dev); |
| 497 | netif_addr_unlock_bh(dev); |
| 498 | return err; |
| 499 | } |
| 500 | EXPORT_SYMBOL(dev_uc_add); |
| 501 | |
| 502 | /** |
| 503 | * dev_uc_del - Release secondary unicast address. |
| 504 | * @dev: device |
| 505 | * @addr: address to delete |
| 506 | * |
| 507 | * Release reference to a secondary unicast address and remove it |
| 508 | * from the device if the reference count drops to zero. |
| 509 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 510 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 511 | { |
| 512 | int err; |
| 513 | |
| 514 | netif_addr_lock_bh(dev); |
| 515 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, |
| 516 | NETDEV_HW_ADDR_T_UNICAST); |
| 517 | if (!err) |
| 518 | __dev_set_rx_mode(dev); |
| 519 | netif_addr_unlock_bh(dev); |
| 520 | return err; |
| 521 | } |
| 522 | EXPORT_SYMBOL(dev_uc_del); |
| 523 | |
| 524 | /** |
| 525 | * dev_uc_sync - Synchronize device's unicast list to another device |
| 526 | * @to: destination device |
| 527 | * @from: source device |
| 528 | * |
| 529 | * Add newly added addresses to the destination device and release |
| 530 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 531 | * locked by netif_addr_lock_bh. |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 532 | * |
| 533 | * 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] | 534 | * function of layered software devices. This function assumes that |
| 535 | * 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] | 536 | */ |
| 537 | int dev_uc_sync(struct net_device *to, struct net_device *from) |
| 538 | { |
| 539 | int err = 0; |
| 540 | |
| 541 | if (to->addr_len != from->addr_len) |
| 542 | return -EINVAL; |
| 543 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 544 | netif_addr_lock_nested(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 545 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
| 546 | if (!err) |
| 547 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 548 | netif_addr_unlock(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 549 | return err; |
| 550 | } |
| 551 | EXPORT_SYMBOL(dev_uc_sync); |
| 552 | |
| 553 | /** |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 554 | * dev_uc_sync_multiple - Synchronize device's unicast list to another |
| 555 | * device, but allow for multiple calls to sync to multiple devices. |
| 556 | * @to: destination device |
| 557 | * @from: source device |
| 558 | * |
| 559 | * Add newly added addresses to the destination device and release |
| 560 | * addresses that have been deleted from the source. The source device |
| 561 | * must be locked by netif_addr_lock_bh. |
| 562 | * |
| 563 | * This function is intended to be called from the dev->set_rx_mode |
| 564 | * function of layered software devices. It allows for a single source |
| 565 | * device to be synced to multiple destination devices. |
| 566 | */ |
| 567 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from) |
| 568 | { |
| 569 | int err = 0; |
| 570 | |
| 571 | if (to->addr_len != from->addr_len) |
| 572 | return -EINVAL; |
| 573 | |
| 574 | netif_addr_lock_nested(to); |
| 575 | err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len); |
| 576 | if (!err) |
| 577 | __dev_set_rx_mode(to); |
| 578 | netif_addr_unlock(to); |
| 579 | return err; |
| 580 | } |
| 581 | EXPORT_SYMBOL(dev_uc_sync_multiple); |
| 582 | |
| 583 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 584 | * dev_uc_unsync - Remove synchronized addresses from the destination device |
| 585 | * @to: destination device |
| 586 | * @from: source device |
| 587 | * |
| 588 | * Remove all addresses that were added to the destination device by |
| 589 | * dev_uc_sync(). This function is intended to be called from the |
| 590 | * dev->stop function of layered software devices. |
| 591 | */ |
| 592 | void dev_uc_unsync(struct net_device *to, struct net_device *from) |
| 593 | { |
| 594 | if (to->addr_len != from->addr_len) |
| 595 | return; |
| 596 | |
| 597 | netif_addr_lock_bh(from); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 598 | netif_addr_lock_nested(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 599 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
| 600 | __dev_set_rx_mode(to); |
| 601 | netif_addr_unlock(to); |
| 602 | netif_addr_unlock_bh(from); |
| 603 | } |
| 604 | EXPORT_SYMBOL(dev_uc_unsync); |
| 605 | |
| 606 | /** |
| 607 | * dev_uc_flush - Flush unicast addresses |
| 608 | * @dev: device |
| 609 | * |
| 610 | * Flush unicast addresses. |
| 611 | */ |
| 612 | void dev_uc_flush(struct net_device *dev) |
| 613 | { |
| 614 | netif_addr_lock_bh(dev); |
| 615 | __hw_addr_flush(&dev->uc); |
| 616 | netif_addr_unlock_bh(dev); |
| 617 | } |
| 618 | EXPORT_SYMBOL(dev_uc_flush); |
| 619 | |
| 620 | /** |
| 621 | * dev_uc_flush - Init unicast address list |
| 622 | * @dev: device |
| 623 | * |
| 624 | * Init unicast address list. |
| 625 | */ |
| 626 | void dev_uc_init(struct net_device *dev) |
| 627 | { |
| 628 | __hw_addr_init(&dev->uc); |
| 629 | } |
| 630 | EXPORT_SYMBOL(dev_uc_init); |
| 631 | |
| 632 | /* |
| 633 | * Multicast list handling functions |
| 634 | */ |
| 635 | |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 636 | /** |
| 637 | * dev_mc_add_excl - Add a global secondary multicast address |
| 638 | * @dev: device |
| 639 | * @addr: address to add |
| 640 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 641 | 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] | 642 | { |
| 643 | struct netdev_hw_addr *ha; |
| 644 | int err; |
| 645 | |
| 646 | netif_addr_lock_bh(dev); |
| 647 | list_for_each_entry(ha, &dev->mc.list, list) { |
| 648 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 649 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { |
| 650 | err = -EEXIST; |
| 651 | goto out; |
| 652 | } |
| 653 | } |
| 654 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 655 | NETDEV_HW_ADDR_T_MULTICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 656 | if (!err) |
| 657 | __dev_set_rx_mode(dev); |
| 658 | out: |
| 659 | netif_addr_unlock_bh(dev); |
| 660 | return err; |
| 661 | } |
| 662 | EXPORT_SYMBOL(dev_mc_add_excl); |
| 663 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 664 | 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] | 665 | bool global) |
| 666 | { |
| 667 | int err; |
| 668 | |
| 669 | netif_addr_lock_bh(dev); |
| 670 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 671 | NETDEV_HW_ADDR_T_MULTICAST, global, false, 0); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 672 | if (!err) |
| 673 | __dev_set_rx_mode(dev); |
| 674 | netif_addr_unlock_bh(dev); |
| 675 | return err; |
| 676 | } |
| 677 | /** |
| 678 | * dev_mc_add - Add a multicast address |
| 679 | * @dev: device |
| 680 | * @addr: address to add |
| 681 | * |
| 682 | * Add a multicast address to the device or increase |
| 683 | * the reference count if it already exists. |
| 684 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 685 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 686 | { |
| 687 | return __dev_mc_add(dev, addr, false); |
| 688 | } |
| 689 | EXPORT_SYMBOL(dev_mc_add); |
| 690 | |
| 691 | /** |
| 692 | * dev_mc_add_global - Add a global multicast address |
| 693 | * @dev: device |
| 694 | * @addr: address to add |
| 695 | * |
| 696 | * Add a global multicast address to the device. |
| 697 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 698 | 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] | 699 | { |
| 700 | return __dev_mc_add(dev, addr, true); |
| 701 | } |
| 702 | EXPORT_SYMBOL(dev_mc_add_global); |
| 703 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 704 | 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] | 705 | bool global) |
| 706 | { |
| 707 | int err; |
| 708 | |
| 709 | netif_addr_lock_bh(dev); |
| 710 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 711 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 712 | if (!err) |
| 713 | __dev_set_rx_mode(dev); |
| 714 | netif_addr_unlock_bh(dev); |
| 715 | return err; |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * dev_mc_del - Delete a multicast address. |
| 720 | * @dev: device |
| 721 | * @addr: address to delete |
| 722 | * |
| 723 | * Release reference to a multicast address and remove it |
| 724 | * from the device if the reference count drops to zero. |
| 725 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 726 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 727 | { |
| 728 | return __dev_mc_del(dev, addr, false); |
| 729 | } |
| 730 | EXPORT_SYMBOL(dev_mc_del); |
| 731 | |
| 732 | /** |
| 733 | * dev_mc_del_global - Delete a global multicast address. |
| 734 | * @dev: device |
| 735 | * @addr: address to delete |
| 736 | * |
| 737 | * Release reference to a multicast address and remove it |
| 738 | * from the device if the reference count drops to zero. |
| 739 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 740 | 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] | 741 | { |
| 742 | return __dev_mc_del(dev, addr, true); |
| 743 | } |
| 744 | EXPORT_SYMBOL(dev_mc_del_global); |
| 745 | |
| 746 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 747 | * dev_mc_sync - Synchronize device's multicast list to another device |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 748 | * @to: destination device |
| 749 | * @from: source device |
| 750 | * |
| 751 | * Add newly added addresses to the destination device and release |
| 752 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 753 | * locked by netif_addr_lock_bh. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 754 | * |
Jiri Pirko | b81693d | 2011-08-16 06:29:02 +0000 | [diff] [blame] | 755 | * This function is intended to be called from the ndo_set_rx_mode |
| 756 | * function of layered software devices. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 757 | */ |
| 758 | int dev_mc_sync(struct net_device *to, struct net_device *from) |
| 759 | { |
| 760 | int err = 0; |
| 761 | |
| 762 | if (to->addr_len != from->addr_len) |
| 763 | return -EINVAL; |
| 764 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 765 | netif_addr_lock_nested(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 766 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
| 767 | if (!err) |
| 768 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 769 | netif_addr_unlock(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 770 | return err; |
| 771 | } |
| 772 | EXPORT_SYMBOL(dev_mc_sync); |
| 773 | |
| 774 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 775 | * dev_mc_sync_multiple - Synchronize device's multicast list to another |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 776 | * device, but allow for multiple calls to sync to multiple devices. |
| 777 | * @to: destination device |
| 778 | * @from: source device |
| 779 | * |
| 780 | * Add newly added addresses to the destination device and release |
| 781 | * addresses that have no users left. The source device must be |
| 782 | * locked by netif_addr_lock_bh. |
| 783 | * |
| 784 | * This function is intended to be called from the ndo_set_rx_mode |
| 785 | * function of layered software devices. It allows for a single |
| 786 | * source device to be synced to multiple destination devices. |
| 787 | */ |
| 788 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from) |
| 789 | { |
| 790 | int err = 0; |
| 791 | |
| 792 | if (to->addr_len != from->addr_len) |
| 793 | return -EINVAL; |
| 794 | |
| 795 | netif_addr_lock_nested(to); |
Jay Vosburgh | b190a50 | 2013-05-31 11:57:29 +0000 | [diff] [blame] | 796 | err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 797 | if (!err) |
| 798 | __dev_set_rx_mode(to); |
| 799 | netif_addr_unlock(to); |
| 800 | return err; |
| 801 | } |
| 802 | EXPORT_SYMBOL(dev_mc_sync_multiple); |
| 803 | |
| 804 | /** |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 805 | * dev_mc_unsync - Remove synchronized addresses from the destination device |
| 806 | * @to: destination device |
| 807 | * @from: source device |
| 808 | * |
| 809 | * Remove all addresses that were added to the destination device by |
| 810 | * dev_mc_sync(). This function is intended to be called from the |
| 811 | * dev->stop function of layered software devices. |
| 812 | */ |
| 813 | void dev_mc_unsync(struct net_device *to, struct net_device *from) |
| 814 | { |
| 815 | if (to->addr_len != from->addr_len) |
| 816 | return; |
| 817 | |
| 818 | netif_addr_lock_bh(from); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 819 | netif_addr_lock_nested(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 820 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
| 821 | __dev_set_rx_mode(to); |
| 822 | netif_addr_unlock(to); |
| 823 | netif_addr_unlock_bh(from); |
| 824 | } |
| 825 | EXPORT_SYMBOL(dev_mc_unsync); |
| 826 | |
| 827 | /** |
| 828 | * dev_mc_flush - Flush multicast addresses |
| 829 | * @dev: device |
| 830 | * |
| 831 | * Flush multicast addresses. |
| 832 | */ |
| 833 | void dev_mc_flush(struct net_device *dev) |
| 834 | { |
| 835 | netif_addr_lock_bh(dev); |
| 836 | __hw_addr_flush(&dev->mc); |
| 837 | netif_addr_unlock_bh(dev); |
| 838 | } |
| 839 | EXPORT_SYMBOL(dev_mc_flush); |
| 840 | |
| 841 | /** |
| 842 | * dev_mc_flush - Init multicast address list |
| 843 | * @dev: device |
| 844 | * |
| 845 | * Init multicast address list. |
| 846 | */ |
| 847 | void dev_mc_init(struct net_device *dev) |
| 848 | { |
| 849 | __hw_addr_init(&dev->mc); |
| 850 | } |
| 851 | EXPORT_SYMBOL(dev_mc_init); |