Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 2 | /* |
| 3 | * net/core/dev_addr_lists.c - Functions for handling net device lists |
| 4 | * Copyright (c) 2010 Jiri Pirko <jpirko@redhat.com> |
| 5 | * |
| 6 | * This file contains functions for working with unicast, multicast and device |
| 7 | * addresses lists. |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/netdevice.h> |
| 11 | #include <linux/rtnetlink.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 12 | #include <linux/export.h> |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 13 | #include <linux/list.h> |
| 14 | |
| 15 | /* |
| 16 | * General list handling functions |
| 17 | */ |
| 18 | |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 19 | static int __hw_addr_create_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 20 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 21 | unsigned char addr_type, bool global, |
| 22 | bool sync) |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 23 | { |
| 24 | struct netdev_hw_addr *ha; |
| 25 | int alloc_size; |
| 26 | |
| 27 | alloc_size = sizeof(*ha); |
| 28 | if (alloc_size < L1_CACHE_BYTES) |
| 29 | alloc_size = L1_CACHE_BYTES; |
| 30 | ha = kmalloc(alloc_size, GFP_ATOMIC); |
| 31 | if (!ha) |
| 32 | return -ENOMEM; |
| 33 | memcpy(ha->addr, addr, addr_len); |
| 34 | ha->type = addr_type; |
| 35 | ha->refcount = 1; |
| 36 | ha->global_use = global; |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 37 | ha->synced = sync ? 1 : 0; |
Jay Vosburgh | 9747ba6 | 2013-05-31 11:57:26 +0000 | [diff] [blame] | 38 | ha->sync_cnt = 0; |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 39 | list_add_tail_rcu(&ha->list, &list->list); |
| 40 | list->count++; |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 45 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 46 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 47 | unsigned char addr_type, bool global, bool sync, |
| 48 | int sync_count) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 49 | { |
| 50 | struct netdev_hw_addr *ha; |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 51 | |
| 52 | if (addr_len > MAX_ADDR_LEN) |
| 53 | return -EINVAL; |
| 54 | |
| 55 | list_for_each_entry(ha, &list->list, list) { |
Eric Dumazet | 77d3639 | 2018-04-07 13:42:40 -0700 | [diff] [blame] | 56 | if (ha->type == addr_type && |
| 57 | !memcmp(ha->addr, addr, addr_len)) { |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 58 | if (global) { |
| 59 | /* check if addr is already used as global */ |
| 60 | if (ha->global_use) |
| 61 | return 0; |
| 62 | else |
| 63 | ha->global_use = true; |
| 64 | } |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 65 | if (sync) { |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 66 | if (ha->synced && sync_count) |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 67 | return -EEXIST; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 68 | else |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 69 | ha->synced++; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 70 | } |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 71 | ha->refcount++; |
| 72 | return 0; |
| 73 | } |
| 74 | } |
| 75 | |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 76 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global, |
| 77 | sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 78 | } |
| 79 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 80 | static int __hw_addr_add(struct netdev_hw_addr_list *list, |
| 81 | const unsigned char *addr, int addr_len, |
| 82 | unsigned char addr_type) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 83 | { |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 84 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false, false, |
| 85 | 0); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | static int __hw_addr_del_entry(struct netdev_hw_addr_list *list, |
| 89 | struct netdev_hw_addr *ha, bool global, |
| 90 | bool sync) |
| 91 | { |
| 92 | if (global && !ha->global_use) |
| 93 | return -ENOENT; |
| 94 | |
| 95 | if (sync && !ha->synced) |
| 96 | return -ENOENT; |
| 97 | |
| 98 | if (global) |
| 99 | ha->global_use = false; |
| 100 | |
| 101 | if (sync) |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 102 | ha->synced--; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 103 | |
| 104 | if (--ha->refcount) |
| 105 | return 0; |
| 106 | list_del_rcu(&ha->list); |
| 107 | kfree_rcu(ha, rcu_head); |
| 108 | list->count--; |
| 109 | return 0; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 110 | } |
| 111 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 112 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 113 | const unsigned char *addr, int addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 114 | unsigned char addr_type, bool global, bool sync) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 115 | { |
| 116 | struct netdev_hw_addr *ha; |
| 117 | |
| 118 | list_for_each_entry(ha, &list->list, list) { |
| 119 | if (!memcmp(ha->addr, addr, addr_len) && |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 120 | (ha->type == addr_type || !addr_type)) |
| 121 | return __hw_addr_del_entry(list, ha, global, sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 122 | } |
| 123 | return -ENOENT; |
| 124 | } |
| 125 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 126 | static int __hw_addr_del(struct netdev_hw_addr_list *list, |
| 127 | const unsigned char *addr, int addr_len, |
| 128 | unsigned char addr_type) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 129 | { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 130 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false, false); |
| 131 | } |
| 132 | |
| 133 | static int __hw_addr_sync_one(struct netdev_hw_addr_list *to_list, |
| 134 | struct netdev_hw_addr *ha, |
| 135 | int addr_len) |
| 136 | { |
| 137 | int err; |
| 138 | |
| 139 | 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] | 140 | false, true, ha->sync_cnt); |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 141 | if (err && err != -EEXIST) |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 142 | return err; |
Jay Vosburgh | 29ca2f8 | 2013-05-31 11:57:28 +0000 | [diff] [blame] | 143 | |
| 144 | if (!err) { |
| 145 | ha->sync_cnt++; |
| 146 | ha->refcount++; |
| 147 | } |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 148 | |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list, |
| 153 | struct netdev_hw_addr_list *from_list, |
| 154 | struct netdev_hw_addr *ha, |
| 155 | int addr_len) |
| 156 | { |
| 157 | int err; |
| 158 | |
| 159 | err = __hw_addr_del_ex(to_list, ha->addr, addr_len, ha->type, |
| 160 | false, true); |
| 161 | if (err) |
| 162 | return; |
| 163 | ha->sync_cnt--; |
Jay Vosburgh | 60ba834 | 2013-05-31 11:57:27 +0000 | [diff] [blame] | 164 | /* address on from list is not marked synced */ |
| 165 | __hw_addr_del_entry(from_list, ha, false, false); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, |
| 169 | struct netdev_hw_addr_list *from_list, |
| 170 | int addr_len) |
| 171 | { |
| 172 | int err = 0; |
| 173 | struct netdev_hw_addr *ha, *tmp; |
| 174 | |
| 175 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
| 176 | if (ha->sync_cnt == ha->refcount) { |
| 177 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
| 178 | } else { |
| 179 | err = __hw_addr_sync_one(to_list, ha, addr_len); |
| 180 | if (err) |
| 181 | break; |
| 182 | } |
| 183 | } |
| 184 | return err; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 185 | } |
| 186 | |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 187 | /* This function only works where there is a strict 1-1 relationship |
| 188 | * between source and destionation of they synch. If you ever need to |
| 189 | * sync addresses to more then 1 destination, you need to use |
| 190 | * __hw_addr_sync_multiple(). |
| 191 | */ |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 192 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| 193 | struct netdev_hw_addr_list *from_list, |
| 194 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 195 | { |
| 196 | int err = 0; |
| 197 | struct netdev_hw_addr *ha, *tmp; |
| 198 | |
| 199 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 200 | if (!ha->sync_cnt) { |
| 201 | err = __hw_addr_sync_one(to_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 202 | if (err) |
| 203 | break; |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 204 | } else if (ha->refcount == 1) |
| 205 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 206 | } |
| 207 | return err; |
| 208 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 209 | EXPORT_SYMBOL(__hw_addr_sync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 210 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 211 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| 212 | struct netdev_hw_addr_list *from_list, |
| 213 | int addr_len) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 214 | { |
| 215 | struct netdev_hw_addr *ha, *tmp; |
| 216 | |
| 217 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 218 | if (ha->sync_cnt) |
| 219 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 220 | } |
| 221 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 222 | EXPORT_SYMBOL(__hw_addr_unsync); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 223 | |
Alexander Duyck | 670e5b8 | 2014-05-28 18:44:46 -0700 | [diff] [blame] | 224 | /** |
| 225 | * __hw_addr_sync_dev - Synchonize device's multicast list |
| 226 | * @list: address list to syncronize |
| 227 | * @dev: device to sync |
| 228 | * @sync: function to call if address should be added |
| 229 | * @unsync: function to call if address should be removed |
| 230 | * |
| 231 | * This funciton is intended to be called from the ndo_set_rx_mode |
| 232 | * function of devices that require explicit address add/remove |
| 233 | * notifications. The unsync function may be NULL in which case |
| 234 | * the addresses requiring removal will simply be removed without |
| 235 | * any notification to the device. |
| 236 | **/ |
| 237 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
| 238 | struct net_device *dev, |
| 239 | int (*sync)(struct net_device *, const unsigned char *), |
| 240 | int (*unsync)(struct net_device *, |
| 241 | const unsigned char *)) |
| 242 | { |
| 243 | struct netdev_hw_addr *ha, *tmp; |
| 244 | int err; |
| 245 | |
| 246 | /* first go through and flush out any stale entries */ |
| 247 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 248 | if (!ha->sync_cnt || ha->refcount != 1) |
| 249 | continue; |
| 250 | |
| 251 | /* if unsync is defined and fails defer unsyncing address */ |
| 252 | if (unsync && unsync(dev, ha->addr)) |
| 253 | continue; |
| 254 | |
| 255 | ha->sync_cnt--; |
| 256 | __hw_addr_del_entry(list, ha, false, false); |
| 257 | } |
| 258 | |
| 259 | /* go through and sync new entries to the list */ |
| 260 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 261 | if (ha->sync_cnt) |
| 262 | continue; |
| 263 | |
| 264 | err = sync(dev, ha->addr); |
| 265 | if (err) |
| 266 | return err; |
| 267 | |
| 268 | ha->sync_cnt++; |
| 269 | ha->refcount++; |
| 270 | } |
| 271 | |
| 272 | return 0; |
| 273 | } |
| 274 | EXPORT_SYMBOL(__hw_addr_sync_dev); |
| 275 | |
| 276 | /** |
Ivan Khoronzhuk | e794676 | 2018-11-08 22:27:54 +0200 | [diff] [blame] | 277 | * __hw_addr_ref_sync_dev - Synchronize device's multicast address list taking |
| 278 | * into account references |
| 279 | * @list: address list to synchronize |
| 280 | * @dev: device to sync |
| 281 | * @sync: function to call if address or reference on it should be added |
| 282 | * @unsync: function to call if address or some reference on it should removed |
| 283 | * |
| 284 | * This function is intended to be called from the ndo_set_rx_mode |
| 285 | * function of devices that require explicit address or references on it |
| 286 | * add/remove notifications. The unsync function may be NULL in which case |
| 287 | * the addresses or references on it requiring removal will simply be |
| 288 | * removed without any notification to the device. That is responsibility of |
| 289 | * the driver to identify and distribute address or references on it between |
| 290 | * internal address tables. |
| 291 | **/ |
| 292 | int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list, |
| 293 | struct net_device *dev, |
| 294 | int (*sync)(struct net_device *, |
| 295 | const unsigned char *, int), |
| 296 | int (*unsync)(struct net_device *, |
| 297 | const unsigned char *, int)) |
| 298 | { |
| 299 | struct netdev_hw_addr *ha, *tmp; |
| 300 | int err, ref_cnt; |
| 301 | |
| 302 | /* first go through and flush out any unsynced/stale entries */ |
| 303 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 304 | /* sync if address is not used */ |
| 305 | if ((ha->sync_cnt << 1) <= ha->refcount) |
| 306 | continue; |
| 307 | |
| 308 | /* if fails defer unsyncing address */ |
| 309 | ref_cnt = ha->refcount - ha->sync_cnt; |
| 310 | if (unsync && unsync(dev, ha->addr, ref_cnt)) |
| 311 | continue; |
| 312 | |
| 313 | ha->refcount = (ref_cnt << 1) + 1; |
| 314 | ha->sync_cnt = ref_cnt; |
| 315 | __hw_addr_del_entry(list, ha, false, false); |
| 316 | } |
| 317 | |
| 318 | /* go through and sync updated/new entries to the list */ |
| 319 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 320 | /* sync if address added or reused */ |
| 321 | if ((ha->sync_cnt << 1) >= ha->refcount) |
| 322 | continue; |
| 323 | |
| 324 | ref_cnt = ha->refcount - ha->sync_cnt; |
| 325 | err = sync(dev, ha->addr, ref_cnt); |
| 326 | if (err) |
| 327 | return err; |
| 328 | |
| 329 | ha->refcount = ref_cnt << 1; |
| 330 | ha->sync_cnt = ref_cnt; |
| 331 | } |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | EXPORT_SYMBOL(__hw_addr_ref_sync_dev); |
| 336 | |
| 337 | /** |
| 338 | * __hw_addr_ref_unsync_dev - Remove synchronized addresses and references on |
| 339 | * it from device |
| 340 | * @list: address list to remove synchronized addresses (references on it) from |
| 341 | * @dev: device to sync |
| 342 | * @unsync: function to call if address and references on it should be removed |
| 343 | * |
| 344 | * Remove all addresses that were added to the device by |
| 345 | * __hw_addr_ref_sync_dev(). This function is intended to be called from the |
| 346 | * ndo_stop or ndo_open functions on devices that require explicit address (or |
| 347 | * references on it) add/remove notifications. If the unsync function pointer |
| 348 | * is NULL then this function can be used to just reset the sync_cnt for the |
| 349 | * addresses in the list. |
| 350 | **/ |
| 351 | void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list, |
| 352 | struct net_device *dev, |
| 353 | int (*unsync)(struct net_device *, |
| 354 | const unsigned char *, int)) |
| 355 | { |
| 356 | struct netdev_hw_addr *ha, *tmp; |
| 357 | |
| 358 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 359 | if (!ha->sync_cnt) |
| 360 | continue; |
| 361 | |
| 362 | /* if fails defer unsyncing address */ |
| 363 | if (unsync && unsync(dev, ha->addr, ha->sync_cnt)) |
| 364 | continue; |
| 365 | |
| 366 | ha->refcount -= ha->sync_cnt - 1; |
| 367 | ha->sync_cnt = 0; |
| 368 | __hw_addr_del_entry(list, ha, false, false); |
| 369 | } |
| 370 | } |
| 371 | EXPORT_SYMBOL(__hw_addr_ref_unsync_dev); |
| 372 | |
| 373 | /** |
Fabian Frederick | 1d2398d | 2014-11-17 22:04:03 +0100 | [diff] [blame] | 374 | * __hw_addr_unsync_dev - Remove synchronized addresses from device |
| 375 | * @list: address list to remove synchronized addresses from |
Alexander Duyck | 670e5b8 | 2014-05-28 18:44:46 -0700 | [diff] [blame] | 376 | * @dev: device to sync |
| 377 | * @unsync: function to call if address should be removed |
| 378 | * |
| 379 | * Remove all addresses that were added to the device by __hw_addr_sync_dev(). |
| 380 | * This function is intended to be called from the ndo_stop or ndo_open |
| 381 | * functions on devices that require explicit address add/remove |
| 382 | * notifications. If the unsync function pointer is NULL then this function |
| 383 | * can be used to just reset the sync_cnt for the addresses in the list. |
| 384 | **/ |
| 385 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, |
| 386 | struct net_device *dev, |
| 387 | int (*unsync)(struct net_device *, |
| 388 | const unsigned char *)) |
| 389 | { |
| 390 | struct netdev_hw_addr *ha, *tmp; |
| 391 | |
| 392 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 393 | if (!ha->sync_cnt) |
| 394 | continue; |
| 395 | |
| 396 | /* if unsync is defined and fails defer unsyncing address */ |
| 397 | if (unsync && unsync(dev, ha->addr)) |
| 398 | continue; |
| 399 | |
| 400 | ha->sync_cnt--; |
| 401 | __hw_addr_del_entry(list, ha, false, false); |
| 402 | } |
| 403 | } |
| 404 | EXPORT_SYMBOL(__hw_addr_unsync_dev); |
| 405 | |
stephen hemminger | 477bb93 | 2013-12-13 12:35:56 -0800 | [diff] [blame] | 406 | static void __hw_addr_flush(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 407 | { |
| 408 | struct netdev_hw_addr *ha, *tmp; |
| 409 | |
| 410 | list_for_each_entry_safe(ha, tmp, &list->list, list) { |
| 411 | list_del_rcu(&ha->list); |
Lai Jiangshan | 217f186 | 2011-03-15 18:08:58 +0800 | [diff] [blame] | 412 | kfree_rcu(ha, rcu_head); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 413 | } |
| 414 | list->count = 0; |
| 415 | } |
| 416 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 417 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 418 | { |
| 419 | INIT_LIST_HEAD(&list->list); |
| 420 | list->count = 0; |
| 421 | } |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 422 | EXPORT_SYMBOL(__hw_addr_init); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 423 | |
| 424 | /* |
| 425 | * Device addresses handling functions |
| 426 | */ |
| 427 | |
| 428 | /** |
| 429 | * dev_addr_flush - Flush device address list |
| 430 | * @dev: device |
| 431 | * |
| 432 | * Flush device address list and reset ->dev_addr. |
| 433 | * |
| 434 | * The caller must hold the rtnl_mutex. |
| 435 | */ |
| 436 | void dev_addr_flush(struct net_device *dev) |
| 437 | { |
| 438 | /* rtnl_mutex must be held here */ |
| 439 | |
| 440 | __hw_addr_flush(&dev->dev_addrs); |
| 441 | dev->dev_addr = NULL; |
| 442 | } |
| 443 | EXPORT_SYMBOL(dev_addr_flush); |
| 444 | |
| 445 | /** |
| 446 | * dev_addr_init - Init device address list |
| 447 | * @dev: device |
| 448 | * |
| 449 | * Init device address list and create the first element, |
| 450 | * used by ->dev_addr. |
| 451 | * |
| 452 | * The caller must hold the rtnl_mutex. |
| 453 | */ |
| 454 | int dev_addr_init(struct net_device *dev) |
| 455 | { |
| 456 | unsigned char addr[MAX_ADDR_LEN]; |
| 457 | struct netdev_hw_addr *ha; |
| 458 | int err; |
| 459 | |
| 460 | /* rtnl_mutex must be held here */ |
| 461 | |
| 462 | __hw_addr_init(&dev->dev_addrs); |
| 463 | memset(addr, 0, sizeof(addr)); |
| 464 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), |
| 465 | NETDEV_HW_ADDR_T_LAN); |
| 466 | if (!err) { |
| 467 | /* |
| 468 | * Get the first (previously created) address from the list |
| 469 | * and set dev_addr pointer to this location. |
| 470 | */ |
| 471 | ha = list_first_entry(&dev->dev_addrs.list, |
| 472 | struct netdev_hw_addr, list); |
| 473 | dev->dev_addr = ha->addr; |
| 474 | } |
| 475 | return err; |
| 476 | } |
| 477 | EXPORT_SYMBOL(dev_addr_init); |
| 478 | |
| 479 | /** |
| 480 | * dev_addr_add - Add a device address |
| 481 | * @dev: device |
| 482 | * @addr: address to add |
| 483 | * @addr_type: address type |
| 484 | * |
| 485 | * Add a device address to the device or increase the reference count if |
| 486 | * it already exists. |
| 487 | * |
| 488 | * The caller must hold the rtnl_mutex. |
| 489 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 490 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 491 | unsigned char addr_type) |
| 492 | { |
| 493 | int err; |
| 494 | |
| 495 | ASSERT_RTNL(); |
| 496 | |
Petr Machata | d59cdf9 | 2018-12-13 11:54:35 +0000 | [diff] [blame] | 497 | err = dev_pre_changeaddr_notify(dev, addr, NULL); |
| 498 | if (err) |
| 499 | return err; |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 500 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); |
| 501 | if (!err) |
| 502 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 503 | return err; |
| 504 | } |
| 505 | EXPORT_SYMBOL(dev_addr_add); |
| 506 | |
| 507 | /** |
| 508 | * dev_addr_del - Release a device address. |
| 509 | * @dev: device |
| 510 | * @addr: address to delete |
| 511 | * @addr_type: address type |
| 512 | * |
| 513 | * Release reference to a device address and remove it from the device |
| 514 | * if the reference count drops to zero. |
| 515 | * |
| 516 | * The caller must hold the rtnl_mutex. |
| 517 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 518 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 519 | unsigned char addr_type) |
| 520 | { |
| 521 | int err; |
| 522 | struct netdev_hw_addr *ha; |
| 523 | |
| 524 | ASSERT_RTNL(); |
| 525 | |
| 526 | /* |
| 527 | * We can not remove the first address from the list because |
| 528 | * dev->dev_addr points to that. |
| 529 | */ |
| 530 | ha = list_first_entry(&dev->dev_addrs.list, |
| 531 | struct netdev_hw_addr, list); |
Jiri Pirko | a652208 | 2012-11-14 02:51:04 +0000 | [diff] [blame] | 532 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 533 | ha->type == addr_type && ha->refcount == 1) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 534 | return -ENOENT; |
| 535 | |
| 536 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, |
| 537 | addr_type); |
| 538 | if (!err) |
| 539 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 540 | return err; |
| 541 | } |
| 542 | EXPORT_SYMBOL(dev_addr_del); |
| 543 | |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 544 | /* |
| 545 | * Unicast list handling functions |
| 546 | */ |
| 547 | |
| 548 | /** |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 549 | * dev_uc_add_excl - Add a global secondary unicast address |
| 550 | * @dev: device |
| 551 | * @addr: address to add |
| 552 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 553 | 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] | 554 | { |
| 555 | struct netdev_hw_addr *ha; |
| 556 | int err; |
| 557 | |
| 558 | netif_addr_lock_bh(dev); |
| 559 | list_for_each_entry(ha, &dev->uc.list, list) { |
| 560 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 561 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { |
| 562 | err = -EEXIST; |
| 563 | goto out; |
| 564 | } |
| 565 | } |
| 566 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 567 | NETDEV_HW_ADDR_T_UNICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 568 | if (!err) |
| 569 | __dev_set_rx_mode(dev); |
| 570 | out: |
| 571 | netif_addr_unlock_bh(dev); |
| 572 | return err; |
| 573 | } |
| 574 | EXPORT_SYMBOL(dev_uc_add_excl); |
| 575 | |
| 576 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 577 | * dev_uc_add - Add a secondary unicast address |
| 578 | * @dev: device |
| 579 | * @addr: address to add |
| 580 | * |
| 581 | * Add a secondary unicast address to the device or increase |
| 582 | * the reference count if it already exists. |
| 583 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 584 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 585 | { |
| 586 | int err; |
| 587 | |
| 588 | netif_addr_lock_bh(dev); |
| 589 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, |
| 590 | NETDEV_HW_ADDR_T_UNICAST); |
| 591 | if (!err) |
| 592 | __dev_set_rx_mode(dev); |
| 593 | netif_addr_unlock_bh(dev); |
| 594 | return err; |
| 595 | } |
| 596 | EXPORT_SYMBOL(dev_uc_add); |
| 597 | |
| 598 | /** |
| 599 | * dev_uc_del - Release secondary unicast address. |
| 600 | * @dev: device |
| 601 | * @addr: address to delete |
| 602 | * |
| 603 | * Release reference to a secondary unicast address and remove it |
| 604 | * from the device if the reference count drops to zero. |
| 605 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 606 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 607 | { |
| 608 | int err; |
| 609 | |
| 610 | netif_addr_lock_bh(dev); |
| 611 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, |
| 612 | NETDEV_HW_ADDR_T_UNICAST); |
| 613 | if (!err) |
| 614 | __dev_set_rx_mode(dev); |
| 615 | netif_addr_unlock_bh(dev); |
| 616 | return err; |
| 617 | } |
| 618 | EXPORT_SYMBOL(dev_uc_del); |
| 619 | |
| 620 | /** |
| 621 | * dev_uc_sync - Synchronize device's unicast list to another device |
| 622 | * @to: destination device |
| 623 | * @from: source device |
| 624 | * |
| 625 | * Add newly added addresses to the destination device and release |
| 626 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 627 | * locked by netif_addr_lock_bh. |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 628 | * |
| 629 | * 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] | 630 | * function of layered software devices. This function assumes that |
| 631 | * 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] | 632 | */ |
| 633 | int dev_uc_sync(struct net_device *to, struct net_device *from) |
| 634 | { |
| 635 | int err = 0; |
| 636 | |
| 637 | if (to->addr_len != from->addr_len) |
| 638 | return -EINVAL; |
| 639 | |
Taehee Yoo | f3b0a18 | 2019-10-21 18:47:58 +0000 | [diff] [blame] | 640 | netif_addr_lock(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 641 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
| 642 | if (!err) |
| 643 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 644 | netif_addr_unlock(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 645 | return err; |
| 646 | } |
| 647 | EXPORT_SYMBOL(dev_uc_sync); |
| 648 | |
| 649 | /** |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 650 | * dev_uc_sync_multiple - Synchronize device's unicast list to another |
| 651 | * device, but allow for multiple calls to sync to multiple devices. |
| 652 | * @to: destination device |
| 653 | * @from: source device |
| 654 | * |
| 655 | * Add newly added addresses to the destination device and release |
| 656 | * addresses that have been deleted from the source. The source device |
| 657 | * must be locked by netif_addr_lock_bh. |
| 658 | * |
| 659 | * This function is intended to be called from the dev->set_rx_mode |
| 660 | * function of layered software devices. It allows for a single source |
| 661 | * device to be synced to multiple destination devices. |
| 662 | */ |
| 663 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from) |
| 664 | { |
| 665 | int err = 0; |
| 666 | |
| 667 | if (to->addr_len != from->addr_len) |
| 668 | return -EINVAL; |
| 669 | |
Taehee Yoo | f3b0a18 | 2019-10-21 18:47:58 +0000 | [diff] [blame] | 670 | netif_addr_lock(to); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 671 | err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len); |
| 672 | if (!err) |
| 673 | __dev_set_rx_mode(to); |
| 674 | netif_addr_unlock(to); |
| 675 | return err; |
| 676 | } |
| 677 | EXPORT_SYMBOL(dev_uc_sync_multiple); |
| 678 | |
| 679 | /** |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 680 | * dev_uc_unsync - Remove synchronized addresses from the destination device |
| 681 | * @to: destination device |
| 682 | * @from: source device |
| 683 | * |
| 684 | * Remove all addresses that were added to the destination device by |
| 685 | * dev_uc_sync(). This function is intended to be called from the |
| 686 | * dev->stop function of layered software devices. |
| 687 | */ |
| 688 | void dev_uc_unsync(struct net_device *to, struct net_device *from) |
| 689 | { |
| 690 | if (to->addr_len != from->addr_len) |
| 691 | return; |
| 692 | |
| 693 | netif_addr_lock_bh(from); |
Taehee Yoo | f3b0a18 | 2019-10-21 18:47:58 +0000 | [diff] [blame] | 694 | netif_addr_lock(to); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 695 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
| 696 | __dev_set_rx_mode(to); |
| 697 | netif_addr_unlock(to); |
| 698 | netif_addr_unlock_bh(from); |
| 699 | } |
| 700 | EXPORT_SYMBOL(dev_uc_unsync); |
| 701 | |
| 702 | /** |
| 703 | * dev_uc_flush - Flush unicast addresses |
| 704 | * @dev: device |
| 705 | * |
| 706 | * Flush unicast addresses. |
| 707 | */ |
| 708 | void dev_uc_flush(struct net_device *dev) |
| 709 | { |
| 710 | netif_addr_lock_bh(dev); |
| 711 | __hw_addr_flush(&dev->uc); |
| 712 | netif_addr_unlock_bh(dev); |
| 713 | } |
| 714 | EXPORT_SYMBOL(dev_uc_flush); |
| 715 | |
| 716 | /** |
| 717 | * dev_uc_flush - Init unicast address list |
| 718 | * @dev: device |
| 719 | * |
| 720 | * Init unicast address list. |
| 721 | */ |
| 722 | void dev_uc_init(struct net_device *dev) |
| 723 | { |
| 724 | __hw_addr_init(&dev->uc); |
| 725 | } |
| 726 | EXPORT_SYMBOL(dev_uc_init); |
| 727 | |
| 728 | /* |
| 729 | * Multicast list handling functions |
| 730 | */ |
| 731 | |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 732 | /** |
| 733 | * dev_mc_add_excl - Add a global secondary multicast address |
| 734 | * @dev: device |
| 735 | * @addr: address to add |
| 736 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 737 | 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] | 738 | { |
| 739 | struct netdev_hw_addr *ha; |
| 740 | int err; |
| 741 | |
| 742 | netif_addr_lock_bh(dev); |
| 743 | list_for_each_entry(ha, &dev->mc.list, list) { |
| 744 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
| 745 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { |
| 746 | err = -EEXIST; |
| 747 | goto out; |
| 748 | } |
| 749 | } |
| 750 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 751 | NETDEV_HW_ADDR_T_MULTICAST, true, false); |
John Fastabend | 12a9463 | 2012-04-15 06:44:02 +0000 | [diff] [blame] | 752 | if (!err) |
| 753 | __dev_set_rx_mode(dev); |
| 754 | out: |
| 755 | netif_addr_unlock_bh(dev); |
| 756 | return err; |
| 757 | } |
| 758 | EXPORT_SYMBOL(dev_mc_add_excl); |
| 759 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 760 | 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] | 761 | bool global) |
| 762 | { |
| 763 | int err; |
| 764 | |
| 765 | netif_addr_lock_bh(dev); |
| 766 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 6ef7b8a | 2014-01-22 12:54:15 -0500 | [diff] [blame] | 767 | NETDEV_HW_ADDR_T_MULTICAST, global, false, 0); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 768 | if (!err) |
| 769 | __dev_set_rx_mode(dev); |
| 770 | netif_addr_unlock_bh(dev); |
| 771 | return err; |
| 772 | } |
| 773 | /** |
| 774 | * dev_mc_add - Add a multicast address |
| 775 | * @dev: device |
| 776 | * @addr: address to add |
| 777 | * |
| 778 | * Add a multicast address to the device or increase |
| 779 | * the reference count if it already exists. |
| 780 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 781 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 782 | { |
| 783 | return __dev_mc_add(dev, addr, false); |
| 784 | } |
| 785 | EXPORT_SYMBOL(dev_mc_add); |
| 786 | |
| 787 | /** |
| 788 | * dev_mc_add_global - Add a global multicast address |
| 789 | * @dev: device |
| 790 | * @addr: address to add |
| 791 | * |
| 792 | * Add a global multicast address to the device. |
| 793 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 794 | 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] | 795 | { |
| 796 | return __dev_mc_add(dev, addr, true); |
| 797 | } |
| 798 | EXPORT_SYMBOL(dev_mc_add_global); |
| 799 | |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 800 | 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] | 801 | bool global) |
| 802 | { |
| 803 | int err; |
| 804 | |
| 805 | netif_addr_lock_bh(dev); |
| 806 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 807 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 808 | if (!err) |
| 809 | __dev_set_rx_mode(dev); |
| 810 | netif_addr_unlock_bh(dev); |
| 811 | return err; |
| 812 | } |
| 813 | |
| 814 | /** |
| 815 | * dev_mc_del - Delete a multicast address. |
| 816 | * @dev: device |
| 817 | * @addr: address to delete |
| 818 | * |
| 819 | * Release reference to a multicast address and remove it |
| 820 | * from the device if the reference count drops to zero. |
| 821 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 822 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 823 | { |
| 824 | return __dev_mc_del(dev, addr, false); |
| 825 | } |
| 826 | EXPORT_SYMBOL(dev_mc_del); |
| 827 | |
| 828 | /** |
| 829 | * dev_mc_del_global - Delete a global multicast address. |
| 830 | * @dev: device |
| 831 | * @addr: address to delete |
| 832 | * |
| 833 | * Release reference to a multicast address and remove it |
| 834 | * from the device if the reference count drops to zero. |
| 835 | */ |
stephen hemminger | 6b6e272 | 2012-09-17 10:03:26 +0000 | [diff] [blame] | 836 | 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] | 837 | { |
| 838 | return __dev_mc_del(dev, addr, true); |
| 839 | } |
| 840 | EXPORT_SYMBOL(dev_mc_del_global); |
| 841 | |
| 842 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 843 | * dev_mc_sync - Synchronize device's multicast list to another device |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 844 | * @to: destination device |
| 845 | * @from: source device |
| 846 | * |
| 847 | * Add newly added addresses to the destination device and release |
| 848 | * addresses that have no users left. The source device must be |
Jiri Pirko | ab16ebf | 2012-01-09 06:18:34 +0000 | [diff] [blame] | 849 | * locked by netif_addr_lock_bh. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 850 | * |
Jiri Pirko | b81693d | 2011-08-16 06:29:02 +0000 | [diff] [blame] | 851 | * This function is intended to be called from the ndo_set_rx_mode |
| 852 | * function of layered software devices. |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 853 | */ |
| 854 | int dev_mc_sync(struct net_device *to, struct net_device *from) |
| 855 | { |
| 856 | int err = 0; |
| 857 | |
| 858 | if (to->addr_len != from->addr_len) |
| 859 | return -EINVAL; |
| 860 | |
Taehee Yoo | f3b0a18 | 2019-10-21 18:47:58 +0000 | [diff] [blame] | 861 | netif_addr_lock(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 862 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
| 863 | if (!err) |
| 864 | __dev_set_rx_mode(to); |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 865 | netif_addr_unlock(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 866 | return err; |
| 867 | } |
| 868 | EXPORT_SYMBOL(dev_mc_sync); |
| 869 | |
| 870 | /** |
Zhi Yong Wu | cdfb97b | 2013-10-28 16:15:50 +0800 | [diff] [blame] | 871 | * dev_mc_sync_multiple - Synchronize device's multicast list to another |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 872 | * device, but allow for multiple calls to sync to multiple devices. |
| 873 | * @to: destination device |
| 874 | * @from: source device |
| 875 | * |
| 876 | * Add newly added addresses to the destination device and release |
| 877 | * addresses that have no users left. The source device must be |
| 878 | * locked by netif_addr_lock_bh. |
| 879 | * |
| 880 | * This function is intended to be called from the ndo_set_rx_mode |
| 881 | * function of layered software devices. It allows for a single |
| 882 | * source device to be synced to multiple destination devices. |
| 883 | */ |
| 884 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from) |
| 885 | { |
| 886 | int err = 0; |
| 887 | |
| 888 | if (to->addr_len != from->addr_len) |
| 889 | return -EINVAL; |
| 890 | |
Taehee Yoo | f3b0a18 | 2019-10-21 18:47:58 +0000 | [diff] [blame] | 891 | netif_addr_lock(to); |
Jay Vosburgh | b190a50 | 2013-05-31 11:57:29 +0000 | [diff] [blame] | 892 | err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len); |
Vlad Yasevich | 4cd729b0 | 2013-04-15 09:54:25 +0000 | [diff] [blame] | 893 | if (!err) |
| 894 | __dev_set_rx_mode(to); |
| 895 | netif_addr_unlock(to); |
| 896 | return err; |
| 897 | } |
| 898 | EXPORT_SYMBOL(dev_mc_sync_multiple); |
| 899 | |
| 900 | /** |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 901 | * dev_mc_unsync - Remove synchronized addresses from the destination device |
| 902 | * @to: destination device |
| 903 | * @from: source device |
| 904 | * |
| 905 | * Remove all addresses that were added to the destination device by |
| 906 | * dev_mc_sync(). This function is intended to be called from the |
| 907 | * dev->stop function of layered software devices. |
| 908 | */ |
| 909 | void dev_mc_unsync(struct net_device *to, struct net_device *from) |
| 910 | { |
| 911 | if (to->addr_len != from->addr_len) |
| 912 | return; |
| 913 | |
| 914 | netif_addr_lock_bh(from); |
Taehee Yoo | f3b0a18 | 2019-10-21 18:47:58 +0000 | [diff] [blame] | 915 | netif_addr_lock(to); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 916 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
| 917 | __dev_set_rx_mode(to); |
| 918 | netif_addr_unlock(to); |
| 919 | netif_addr_unlock_bh(from); |
| 920 | } |
| 921 | EXPORT_SYMBOL(dev_mc_unsync); |
| 922 | |
| 923 | /** |
| 924 | * dev_mc_flush - Flush multicast addresses |
| 925 | * @dev: device |
| 926 | * |
| 927 | * Flush multicast addresses. |
| 928 | */ |
| 929 | void dev_mc_flush(struct net_device *dev) |
| 930 | { |
| 931 | netif_addr_lock_bh(dev); |
| 932 | __hw_addr_flush(&dev->mc); |
| 933 | netif_addr_unlock_bh(dev); |
| 934 | } |
| 935 | EXPORT_SYMBOL(dev_mc_flush); |
| 936 | |
| 937 | /** |
sunlianwen | bb9aaaa | 2018-04-18 09:22:39 +0800 | [diff] [blame] | 938 | * dev_mc_init - Init multicast address list |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 939 | * @dev: device |
| 940 | * |
| 941 | * Init multicast address list. |
| 942 | */ |
| 943 | void dev_mc_init(struct net_device *dev) |
| 944 | { |
| 945 | __hw_addr_init(&dev->mc); |
| 946 | } |
| 947 | EXPORT_SYMBOL(dev_mc_init); |