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 | |
stephen hemminger | 477bb93 | 2013-12-13 12:35:56 -0800 | [diff] [blame] | 228 | static void __hw_addr_flush(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 229 | { |
| 230 | struct netdev_hw_addr *ha, *tmp; |
| 231 | |
| 232 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 233 | list_del_rcu(&ha->list); |
Lai Jiangshan | 217f186 | 2011-03-15 18:08:58 +0800 | [diff] [blame] | 234 | kfree_rcu(ha, rcu_head); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 235 | } |
| 236 | list->count = 0; |
| 237 | } |
| 238 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 239 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 240 | { |
| 241 | INIT_LIST_HEAD(&list->list); |
| 242 | list->count = 0; |
| 243 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 244 | EXPORT_SYMBOL(__hw_addr_init); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 245 | |
| 246 | /* |
| 247 | * Device addresses handling functions |
| 248 | */ |
| 249 | |
| 250 | /** |
| 251 | * dev_addr_flush - Flush device address list |
| 252 | * @dev: device |
| 253 | * |
| 254 | * Flush device address list and reset ->dev_addr. |
| 255 | * |
| 256 | * The caller must hold the rtnl_mutex. |
| 257 | */ |
| 258 | void dev_addr_flush(struct net_device *dev) |
| 259 | { |
| 260 | /* rtnl_mutex must be held here */ |
| 261 | |
| 262 | __hw_addr_flush(&dev->dev_addrs); |
| 263 | dev->dev_addr = NULL; |
| 264 | } |
| 265 | EXPORT_SYMBOL(dev_addr_flush); |
| 266 | |
| 267 | /** |
| 268 | * dev_addr_init - Init device address list |
| 269 | * @dev: device |
| 270 | * |
| 271 | * Init device address list and create the first element, |
| 272 | * used by ->dev_addr. |
| 273 | * |
| 274 | * The caller must hold the rtnl_mutex. |
| 275 | */ |
| 276 | int dev_addr_init(struct net_device *dev) |
| 277 | { |
| 278 | unsigned char addr[MAX_ADDR_LEN]; |
| 279 | struct netdev_hw_addr *ha; |
| 280 | int err; |
| 281 | |
| 282 | /* rtnl_mutex must be held here */ |
| 283 | |
| 284 | __hw_addr_init(&dev->dev_addrs); |
| 285 | memset(addr, 0, sizeof(addr)); |
| 286 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), |
| 287 | NETDEV_HW_ADDR_T_LAN); |
| 288 | if (!err) { |
| 289 | /* |
| 290 | * Get the first (previously created) address from the list |
| 291 | * and set dev_addr pointer to this location. |
| 292 | */ |
| 293 | ha = list_first_entry(&dev->dev_addrs.list, |
| 294 | struct netdev_hw_addr, list); |
| 295 | dev->dev_addr = ha->addr; |
| 296 | } |
| 297 | return err; |
| 298 | } |
| 299 | EXPORT_SYMBOL(dev_addr_init); |
| 300 | |
| 301 | /** |
| 302 | * dev_addr_add - Add a device address |
| 303 | * @dev: device |
| 304 | * @addr: address to add |
| 305 | * @addr_type: address type |
| 306 | * |
| 307 | * Add a device address to the device or increase the reference count if |
| 308 | * it already exists. |
| 309 | * |
| 310 | * The caller must hold the rtnl_mutex. |
| 311 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 312 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 313 | unsigned char addr_type) |
| 314 | { |
| 315 | int err; |
| 316 | |
| 317 | ASSERT_RTNL(); |
| 318 | |
| 319 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); |
| 320 | if (!err) |
| 321 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 322 | return err; |
| 323 | } |
| 324 | EXPORT_SYMBOL(dev_addr_add); |
| 325 | |
| 326 | /** |
| 327 | * dev_addr_del - Release a device address. |
| 328 | * @dev: device |
| 329 | * @addr: address to delete |
| 330 | * @addr_type: address type |
| 331 | * |
| 332 | * Release reference to a device address and remove it from the device |
| 333 | * if the reference count drops to zero. |
| 334 | * |
| 335 | * The caller must hold the rtnl_mutex. |
| 336 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 337 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 338 | unsigned char addr_type) |
| 339 | { |
| 340 | int err; |
| 341 | struct netdev_hw_addr *ha; |
| 342 | |
| 343 | ASSERT_RTNL(); |
| 344 | |
| 345 | /* |
| 346 | * We can not remove the first address from the list because |
| 347 | * dev->dev_addr points to that. |
| 348 | */ |
| 349 | ha = list_first_entry(&dev->dev_addrs.list, |
| 350 | struct netdev_hw_addr, list); |
Jiri Pirko | a652208 | 2012-11-14 02:51:04 +0000 | [diff] [blame] | 351 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 352 | ha->type == addr_type && ha->refcount == 1) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 353 | return -ENOENT; |
| 354 | |
| 355 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, |
| 356 | addr_type); |
| 357 | if (!err) |
| 358 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 359 | return err; |
| 360 | } |
| 361 | EXPORT_SYMBOL(dev_addr_del); |
| 362 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 363 | /* |
| 364 | * Unicast list handling functions |
| 365 | */ |
| 366 | |
| 367 | /** |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 368 | * dev_uc_add_excl - Add a global secondary unicast address |
| 369 | * @dev: device |
| 370 | * @addr: address to add |
| 371 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 372 | 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] | 373 | { |
| 374 | struct netdev_hw_addr *ha; |
| 375 | int err; |
| 376 | |
| 377 | netif_addr_lock_bh(dev); |
| 378 | list_for_each_entry(ha, &dev->uc.list, list) { |
| 379 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 380 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { |
| 381 | err = -EEXIST; |
| 382 | goto out; |
| 383 | } |
| 384 | } |
| 385 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 386 | NETDEV_HW_ADDR_T_UNICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 387 | if (!err) |
| 388 | __dev_set_rx_mode(dev); |
| 389 | out: |
| 390 | netif_addr_unlock_bh(dev); |
| 391 | return err; |
| 392 | } |
| 393 | EXPORT_SYMBOL(dev_uc_add_excl); |
| 394 | |
| 395 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 396 | * dev_uc_add - Add a secondary unicast address |
| 397 | * @dev: device |
| 398 | * @addr: address to add |
| 399 | * |
| 400 | * Add a secondary unicast address to the device or increase |
| 401 | * the reference count if it already exists. |
| 402 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 403 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 404 | { |
| 405 | int err; |
| 406 | |
| 407 | netif_addr_lock_bh(dev); |
| 408 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, |
| 409 | NETDEV_HW_ADDR_T_UNICAST); |
| 410 | if (!err) |
| 411 | __dev_set_rx_mode(dev); |
| 412 | netif_addr_unlock_bh(dev); |
| 413 | return err; |
| 414 | } |
| 415 | EXPORT_SYMBOL(dev_uc_add); |
| 416 | |
| 417 | /** |
| 418 | * dev_uc_del - Release secondary unicast address. |
| 419 | * @dev: device |
| 420 | * @addr: address to delete |
| 421 | * |
| 422 | * Release reference to a secondary unicast address and remove it |
| 423 | * from the device if the reference count drops to zero. |
| 424 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 425 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 426 | { |
| 427 | int err; |
| 428 | |
| 429 | netif_addr_lock_bh(dev); |
| 430 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, |
| 431 | NETDEV_HW_ADDR_T_UNICAST); |
| 432 | if (!err) |
| 433 | __dev_set_rx_mode(dev); |
| 434 | netif_addr_unlock_bh(dev); |
| 435 | return err; |
| 436 | } |
| 437 | EXPORT_SYMBOL(dev_uc_del); |
| 438 | |
| 439 | /** |
| 440 | * dev_uc_sync - Synchronize device's unicast list to another device |
| 441 | * @to: destination device |
| 442 | * @from: source device |
| 443 | * |
| 444 | * Add newly added addresses to the destination device and release |
| 445 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 446 | * locked by netif_addr_lock_bh. |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 447 | * |
| 448 | * 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] | 449 | * function of layered software devices. This function assumes that |
| 450 | * 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] | 451 | */ |
| 452 | int dev_uc_sync(struct net_device *to, struct net_device *from) |
| 453 | { |
| 454 | int err = 0; |
| 455 | |
| 456 | if (to->addr_len != from->addr_len) |
| 457 | return -EINVAL; |
| 458 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 459 | netif_addr_lock_nested(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 460 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
| 461 | if (!err) |
| 462 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 463 | netif_addr_unlock(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 464 | return err; |
| 465 | } |
| 466 | EXPORT_SYMBOL(dev_uc_sync); |
| 467 | |
| 468 | /** |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 469 | * dev_uc_sync_multiple - Synchronize device's unicast list to another |
| 470 | * device, but allow for multiple calls to sync to multiple devices. |
| 471 | * @to: destination device |
| 472 | * @from: source device |
| 473 | * |
| 474 | * Add newly added addresses to the destination device and release |
| 475 | * addresses that have been deleted from the source. The source device |
| 476 | * must be locked by netif_addr_lock_bh. |
| 477 | * |
| 478 | * This function is intended to be called from the dev->set_rx_mode |
| 479 | * function of layered software devices. It allows for a single source |
| 480 | * device to be synced to multiple destination devices. |
| 481 | */ |
| 482 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from) |
| 483 | { |
| 484 | int err = 0; |
| 485 | |
| 486 | if (to->addr_len != from->addr_len) |
| 487 | return -EINVAL; |
| 488 | |
| 489 | netif_addr_lock_nested(to); |
| 490 | err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len); |
| 491 | if (!err) |
| 492 | __dev_set_rx_mode(to); |
| 493 | netif_addr_unlock(to); |
| 494 | return err; |
| 495 | } |
| 496 | EXPORT_SYMBOL(dev_uc_sync_multiple); |
| 497 | |
| 498 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 499 | * dev_uc_unsync - Remove synchronized addresses from the destination device |
| 500 | * @to: destination device |
| 501 | * @from: source device |
| 502 | * |
| 503 | * Remove all addresses that were added to the destination device by |
| 504 | * dev_uc_sync(). This function is intended to be called from the |
| 505 | * dev->stop function of layered software devices. |
| 506 | */ |
| 507 | void dev_uc_unsync(struct net_device *to, struct net_device *from) |
| 508 | { |
| 509 | if (to->addr_len != from->addr_len) |
| 510 | return; |
| 511 | |
| 512 | netif_addr_lock_bh(from); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 513 | netif_addr_lock_nested(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 514 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
| 515 | __dev_set_rx_mode(to); |
| 516 | netif_addr_unlock(to); |
| 517 | netif_addr_unlock_bh(from); |
| 518 | } |
| 519 | EXPORT_SYMBOL(dev_uc_unsync); |
| 520 | |
| 521 | /** |
| 522 | * dev_uc_flush - Flush unicast addresses |
| 523 | * @dev: device |
| 524 | * |
| 525 | * Flush unicast addresses. |
| 526 | */ |
| 527 | void dev_uc_flush(struct net_device *dev) |
| 528 | { |
| 529 | netif_addr_lock_bh(dev); |
| 530 | __hw_addr_flush(&dev->uc); |
| 531 | netif_addr_unlock_bh(dev); |
| 532 | } |
| 533 | EXPORT_SYMBOL(dev_uc_flush); |
| 534 | |
| 535 | /** |
| 536 | * dev_uc_flush - Init unicast address list |
| 537 | * @dev: device |
| 538 | * |
| 539 | * Init unicast address list. |
| 540 | */ |
| 541 | void dev_uc_init(struct net_device *dev) |
| 542 | { |
| 543 | __hw_addr_init(&dev->uc); |
| 544 | } |
| 545 | EXPORT_SYMBOL(dev_uc_init); |
| 546 | |
| 547 | /* |
| 548 | * Multicast list handling functions |
| 549 | */ |
| 550 | |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 551 | /** |
| 552 | * dev_mc_add_excl - Add a global secondary multicast address |
| 553 | * @dev: device |
| 554 | * @addr: address to add |
| 555 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 556 | 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] | 557 | { |
| 558 | struct netdev_hw_addr *ha; |
| 559 | int err; |
| 560 | |
| 561 | netif_addr_lock_bh(dev); |
| 562 | list_for_each_entry(ha, &dev->mc.list, list) { |
| 563 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 564 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { |
| 565 | err = -EEXIST; |
| 566 | goto out; |
| 567 | } |
| 568 | } |
| 569 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 570 | NETDEV_HW_ADDR_T_MULTICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 571 | if (!err) |
| 572 | __dev_set_rx_mode(dev); |
| 573 | out: |
| 574 | netif_addr_unlock_bh(dev); |
| 575 | return err; |
| 576 | } |
| 577 | EXPORT_SYMBOL(dev_mc_add_excl); |
| 578 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 579 | 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] | 580 | bool global) |
| 581 | { |
| 582 | int err; |
| 583 | |
| 584 | netif_addr_lock_bh(dev); |
| 585 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 586 | NETDEV_HW_ADDR_T_MULTICAST, global, false, 0); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 587 | if (!err) |
| 588 | __dev_set_rx_mode(dev); |
| 589 | netif_addr_unlock_bh(dev); |
| 590 | return err; |
| 591 | } |
| 592 | /** |
| 593 | * dev_mc_add - Add a multicast address |
| 594 | * @dev: device |
| 595 | * @addr: address to add |
| 596 | * |
| 597 | * Add a multicast address to the device or increase |
| 598 | * the reference count if it already exists. |
| 599 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 600 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 601 | { |
| 602 | return __dev_mc_add(dev, addr, false); |
| 603 | } |
| 604 | EXPORT_SYMBOL(dev_mc_add); |
| 605 | |
| 606 | /** |
| 607 | * dev_mc_add_global - Add a global multicast address |
| 608 | * @dev: device |
| 609 | * @addr: address to add |
| 610 | * |
| 611 | * Add a global multicast address to the device. |
| 612 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 613 | 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] | 614 | { |
| 615 | return __dev_mc_add(dev, addr, true); |
| 616 | } |
| 617 | EXPORT_SYMBOL(dev_mc_add_global); |
| 618 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 619 | 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] | 620 | bool global) |
| 621 | { |
| 622 | int err; |
| 623 | |
| 624 | netif_addr_lock_bh(dev); |
| 625 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 626 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 627 | if (!err) |
| 628 | __dev_set_rx_mode(dev); |
| 629 | netif_addr_unlock_bh(dev); |
| 630 | return err; |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * dev_mc_del - Delete a multicast address. |
| 635 | * @dev: device |
| 636 | * @addr: address to delete |
| 637 | * |
| 638 | * Release reference to a multicast address and remove it |
| 639 | * from the device if the reference count drops to zero. |
| 640 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 641 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 642 | { |
| 643 | return __dev_mc_del(dev, addr, false); |
| 644 | } |
| 645 | EXPORT_SYMBOL(dev_mc_del); |
| 646 | |
| 647 | /** |
| 648 | * dev_mc_del_global - Delete a global multicast address. |
| 649 | * @dev: device |
| 650 | * @addr: address to delete |
| 651 | * |
| 652 | * Release reference to a multicast address and remove it |
| 653 | * from the device if the reference count drops to zero. |
| 654 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 655 | 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] | 656 | { |
| 657 | return __dev_mc_del(dev, addr, true); |
| 658 | } |
| 659 | EXPORT_SYMBOL(dev_mc_del_global); |
| 660 | |
| 661 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 662 | * dev_mc_sync - Synchronize device's multicast list to another device |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 663 | * @to: destination device |
| 664 | * @from: source device |
| 665 | * |
| 666 | * Add newly added addresses to the destination device and release |
| 667 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 668 | * locked by netif_addr_lock_bh. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 669 | * |
Jiri Pirko | b81693d | 2011-08-16 06:29:02 +0000 | [diff] [blame] | 670 | * This function is intended to be called from the ndo_set_rx_mode |
| 671 | * function of layered software devices. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 672 | */ |
| 673 | int dev_mc_sync(struct net_device *to, struct net_device *from) |
| 674 | { |
| 675 | int err = 0; |
| 676 | |
| 677 | if (to->addr_len != from->addr_len) |
| 678 | return -EINVAL; |
| 679 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 680 | netif_addr_lock_nested(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 681 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
| 682 | if (!err) |
| 683 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 684 | netif_addr_unlock(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 685 | return err; |
| 686 | } |
| 687 | EXPORT_SYMBOL(dev_mc_sync); |
| 688 | |
| 689 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 690 | * dev_mc_sync_multiple - Synchronize device's multicast list to another |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 691 | * device, but allow for multiple calls to sync to multiple devices. |
| 692 | * @to: destination device |
| 693 | * @from: source device |
| 694 | * |
| 695 | * Add newly added addresses to the destination device and release |
| 696 | * addresses that have no users left. The source device must be |
| 697 | * locked by netif_addr_lock_bh. |
| 698 | * |
| 699 | * This function is intended to be called from the ndo_set_rx_mode |
| 700 | * function of layered software devices. It allows for a single |
| 701 | * source device to be synced to multiple destination devices. |
| 702 | */ |
| 703 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from) |
| 704 | { |
| 705 | int err = 0; |
| 706 | |
| 707 | if (to->addr_len != from->addr_len) |
| 708 | return -EINVAL; |
| 709 | |
| 710 | netif_addr_lock_nested(to); |
Jay Vosburgh | b190a50 | 2013-05-31 11:57:29 +0000 | [diff] [blame] | 711 | err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 712 | if (!err) |
| 713 | __dev_set_rx_mode(to); |
| 714 | netif_addr_unlock(to); |
| 715 | return err; |
| 716 | } |
| 717 | EXPORT_SYMBOL(dev_mc_sync_multiple); |
| 718 | |
| 719 | /** |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 720 | * dev_mc_unsync - Remove synchronized addresses from the destination device |
| 721 | * @to: destination device |
| 722 | * @from: source device |
| 723 | * |
| 724 | * Remove all addresses that were added to the destination device by |
| 725 | * dev_mc_sync(). This function is intended to be called from the |
| 726 | * dev->stop function of layered software devices. |
| 727 | */ |
| 728 | void dev_mc_unsync(struct net_device *to, struct net_device *from) |
| 729 | { |
| 730 | if (to->addr_len != from->addr_len) |
| 731 | return; |
| 732 | |
| 733 | netif_addr_lock_bh(from); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 734 | netif_addr_lock_nested(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 735 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
| 736 | __dev_set_rx_mode(to); |
| 737 | netif_addr_unlock(to); |
| 738 | netif_addr_unlock_bh(from); |
| 739 | } |
| 740 | EXPORT_SYMBOL(dev_mc_unsync); |
| 741 | |
| 742 | /** |
| 743 | * dev_mc_flush - Flush multicast addresses |
| 744 | * @dev: device |
| 745 | * |
| 746 | * Flush multicast addresses. |
| 747 | */ |
| 748 | void dev_mc_flush(struct net_device *dev) |
| 749 | { |
| 750 | netif_addr_lock_bh(dev); |
| 751 | __hw_addr_flush(&dev->mc); |
| 752 | netif_addr_unlock_bh(dev); |
| 753 | } |
| 754 | EXPORT_SYMBOL(dev_mc_flush); |
| 755 | |
| 756 | /** |
| 757 | * dev_mc_flush - Init multicast address list |
| 758 | * @dev: device |
| 759 | * |
| 760 | * Init multicast address list. |
| 761 | */ |
| 762 | void dev_mc_init(struct net_device *dev) |
| 763 | { |
| 764 | __hw_addr_init(&dev->mc); |
| 765 | } |
| 766 | EXPORT_SYMBOL(dev_mc_init); |