// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* net/core/dev_addr_lists.c - Functions for handling net device lists
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* Copyright (c) 2010 Jiri Pirko <jpirko@redhat.com>
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*
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* This file contains functions for working with unicast, multicast and device
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* addresses lists.
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*/
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/export.h>
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#include <linux/list.h>
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/*
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* General list handling functions
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*/
|
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static int __hw_addr_create_ex(struct netdev_hw_addr_list *list,
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const unsigned char *addr, int addr_len,
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unsigned char addr_type, bool global,
|
bool sync)
|
{
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struct netdev_hw_addr *ha;
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int alloc_size;
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alloc_size = sizeof(*ha);
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if (alloc_size < L1_CACHE_BYTES)
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alloc_size = L1_CACHE_BYTES;
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ha = kmalloc(alloc_size, GFP_ATOMIC);
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if (!ha)
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return -ENOMEM;
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memcpy(ha->addr, addr, addr_len);
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ha->type = addr_type;
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ha->refcount = 1;
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ha->global_use = global;
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ha->synced = sync ? 1 : 0;
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ha->sync_cnt = 0;
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list_add_tail_rcu(&ha->list, &list->list);
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list->count++;
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return 0;
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}
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static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
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const unsigned char *addr, int addr_len,
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unsigned char addr_type, bool global, bool sync,
|
int sync_count)
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{
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struct netdev_hw_addr *ha;
|
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if (addr_len > MAX_ADDR_LEN)
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return -EINVAL;
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list_for_each_entry(ha, &list->list, list) {
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if (ha->type == addr_type &&
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!memcmp(ha->addr, addr, addr_len)) {
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if (global) {
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/* check if addr is already used as global */
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if (ha->global_use)
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return 0;
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else
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ha->global_use = true;
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}
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if (sync) {
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if (ha->synced && sync_count)
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return -EEXIST;
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else
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ha->synced++;
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}
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ha->refcount++;
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return 0;
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}
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}
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return __hw_addr_create_ex(list, addr, addr_len, addr_type, global,
|
sync);
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}
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static int __hw_addr_add(struct netdev_hw_addr_list *list,
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const unsigned char *addr, int addr_len,
|
unsigned char addr_type)
|
{
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return __hw_addr_add_ex(list, addr, addr_len, addr_type, false, false,
|
0);
|
}
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static int __hw_addr_del_entry(struct netdev_hw_addr_list *list,
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struct netdev_hw_addr *ha, bool global,
|
bool sync)
|
{
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if (global && !ha->global_use)
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return -ENOENT;
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if (sync && !ha->synced)
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return -ENOENT;
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if (global)
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ha->global_use = false;
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if (sync)
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ha->synced--;
|
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if (--ha->refcount)
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return 0;
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list_del_rcu(&ha->list);
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kfree_rcu(ha, rcu_head);
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list->count--;
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return 0;
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}
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static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
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const unsigned char *addr, int addr_len,
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unsigned char addr_type, bool global, bool sync)
|
{
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struct netdev_hw_addr *ha;
|
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list_for_each_entry(ha, &list->list, list) {
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if (!memcmp(ha->addr, addr, addr_len) &&
|
(ha->type == addr_type || !addr_type))
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return __hw_addr_del_entry(list, ha, global, sync);
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}
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return -ENOENT;
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}
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static int __hw_addr_del(struct netdev_hw_addr_list *list,
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const unsigned char *addr, int addr_len,
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unsigned char addr_type)
|
{
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return __hw_addr_del_ex(list, addr, addr_len, addr_type, false, false);
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}
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static int __hw_addr_sync_one(struct netdev_hw_addr_list *to_list,
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struct netdev_hw_addr *ha,
|
int addr_len)
|
{
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int err;
|
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err = __hw_addr_add_ex(to_list, ha->addr, addr_len, ha->type,
|
false, true, ha->sync_cnt);
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if (err && err != -EEXIST)
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return err;
|
|
if (!err) {
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ha->sync_cnt++;
|
ha->refcount++;
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}
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return 0;
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}
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|
static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list,
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struct netdev_hw_addr_list *from_list,
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struct netdev_hw_addr *ha,
|
int addr_len)
|
{
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int err;
|
|
err = __hw_addr_del_ex(to_list, ha->addr, addr_len, ha->type,
|
false, true);
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if (err)
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return;
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ha->sync_cnt--;
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/* address on from list is not marked synced */
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__hw_addr_del_entry(from_list, ha, false, false);
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}
|
|
static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list,
|
struct netdev_hw_addr_list *from_list,
|
int addr_len)
|
{
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int err = 0;
|
struct netdev_hw_addr *ha, *tmp;
|
|
list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
|
if (ha->sync_cnt == ha->refcount) {
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__hw_addr_unsync_one(to_list, from_list, ha, addr_len);
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} else {
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err = __hw_addr_sync_one(to_list, ha, addr_len);
|
if (err)
|
break;
|
}
|
}
|
return err;
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}
|
|
/* This function only works where there is a strict 1-1 relationship
|
* between source and destionation of they synch. If you ever need to
|
* sync addresses to more then 1 destination, you need to use
|
* __hw_addr_sync_multiple().
|
*/
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int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
|
struct netdev_hw_addr_list *from_list,
|
int addr_len)
|
{
|
int err = 0;
|
struct netdev_hw_addr *ha, *tmp;
|
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list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
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if (!ha->sync_cnt) {
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err = __hw_addr_sync_one(to_list, ha, addr_len);
|
if (err)
|
break;
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} else if (ha->refcount == 1)
|
__hw_addr_unsync_one(to_list, from_list, ha, addr_len);
|
}
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return err;
|
}
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EXPORT_SYMBOL(__hw_addr_sync);
|
|
void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
|
struct netdev_hw_addr_list *from_list,
|
int addr_len)
|
{
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struct netdev_hw_addr *ha, *tmp;
|
|
list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
|
if (ha->sync_cnt)
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__hw_addr_unsync_one(to_list, from_list, ha, addr_len);
|
}
|
}
|
EXPORT_SYMBOL(__hw_addr_unsync);
|
|
/**
|
* __hw_addr_sync_dev - Synchonize device's multicast list
|
* @list: address list to syncronize
|
* @dev: device to sync
|
* @sync: function to call if address should be added
|
* @unsync: function to call if address should be removed
|
*
|
* This funciton is intended to be called from the ndo_set_rx_mode
|
* function of devices that require explicit address add/remove
|
* notifications. The unsync function may be NULL in which case
|
* the addresses requiring removal will simply be removed without
|
* any notification to the device.
|
**/
|
int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
|
struct net_device *dev,
|
int (*sync)(struct net_device *, const unsigned char *),
|
int (*unsync)(struct net_device *,
|
const unsigned char *))
|
{
|
struct netdev_hw_addr *ha, *tmp;
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int err;
|
|
/* first go through and flush out any stale entries */
|
list_for_each_entry_safe(ha, tmp, &list->list, list) {
|
if (!ha->sync_cnt || ha->refcount != 1)
|
continue;
|
|
/* if unsync is defined and fails defer unsyncing address */
|
if (unsync && unsync(dev, ha->addr))
|
continue;
|
|
ha->sync_cnt--;
|
__hw_addr_del_entry(list, ha, false, false);
|
}
|
|
/* go through and sync new entries to the list */
|
list_for_each_entry_safe(ha, tmp, &list->list, list) {
|
if (ha->sync_cnt)
|
continue;
|
|
err = sync(dev, ha->addr);
|
if (err)
|
return err;
|
|
ha->sync_cnt++;
|
ha->refcount++;
|
}
|
|
return 0;
|
}
|
EXPORT_SYMBOL(__hw_addr_sync_dev);
|
|
/**
|
* __hw_addr_ref_sync_dev - Synchronize device's multicast address list taking
|
* into account references
|
* @list: address list to synchronize
|
* @dev: device to sync
|
* @sync: function to call if address or reference on it should be added
|
* @unsync: function to call if address or some reference on it should removed
|
*
|
* This function is intended to be called from the ndo_set_rx_mode
|
* function of devices that require explicit address or references on it
|
* add/remove notifications. The unsync function may be NULL in which case
|
* the addresses or references on it requiring removal will simply be
|
* removed without any notification to the device. That is responsibility of
|
* the driver to identify and distribute address or references on it between
|
* internal address tables.
|
**/
|
int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
|
struct net_device *dev,
|
int (*sync)(struct net_device *,
|
const unsigned char *, int),
|
int (*unsync)(struct net_device *,
|
const unsigned char *, int))
|
{
|
struct netdev_hw_addr *ha, *tmp;
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int err, ref_cnt;
|
|
/* first go through and flush out any unsynced/stale entries */
|
list_for_each_entry_safe(ha, tmp, &list->list, list) {
|
/* sync if address is not used */
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if ((ha->sync_cnt << 1) <= ha->refcount)
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continue;
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|
/* if fails defer unsyncing address */
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ref_cnt = ha->refcount - ha->sync_cnt;
|
if (unsync && unsync(dev, ha->addr, ref_cnt))
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continue;
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|
ha->refcount = (ref_cnt << 1) + 1;
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ha->sync_cnt = ref_cnt;
|
__hw_addr_del_entry(list, ha, false, false);
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}
|
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/* go through and sync updated/new entries to the list */
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list_for_each_entry_safe(ha, tmp, &list->list, list) {
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/* sync if address added or reused */
|
if ((ha->sync_cnt << 1) >= ha->refcount)
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continue;
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|
ref_cnt = ha->refcount - ha->sync_cnt;
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err = sync(dev, ha->addr, ref_cnt);
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if (err)
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return err;
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|
ha->refcount = ref_cnt << 1;
|
ha->sync_cnt = ref_cnt;
|
}
|
|
return 0;
|
}
|
EXPORT_SYMBOL(__hw_addr_ref_sync_dev);
|
|
/**
|
* __hw_addr_ref_unsync_dev - Remove synchronized addresses and references on
|
* it from device
|
* @list: address list to remove synchronized addresses (references on it) from
|
* @dev: device to sync
|
* @unsync: function to call if address and references on it should be removed
|
*
|
* Remove all addresses that were added to the device by
|
* __hw_addr_ref_sync_dev(). This function is intended to be called from the
|
* ndo_stop or ndo_open functions on devices that require explicit address (or
|
* references on it) add/remove notifications. If the unsync function pointer
|
* is NULL then this function can be used to just reset the sync_cnt for the
|
* addresses in the list.
|
**/
|
void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
|
struct net_device *dev,
|
int (*unsync)(struct net_device *,
|
const unsigned char *, int))
|
{
|
struct netdev_hw_addr *ha, *tmp;
|
|
list_for_each_entry_safe(ha, tmp, &list->list, list) {
|
if (!ha->sync_cnt)
|
continue;
|
|
/* if fails defer unsyncing address */
|
if (unsync && unsync(dev, ha->addr, ha->sync_cnt))
|
continue;
|
|
ha->refcount -= ha->sync_cnt - 1;
|
ha->sync_cnt = 0;
|
__hw_addr_del_entry(list, ha, false, false);
|
}
|
}
|
EXPORT_SYMBOL(__hw_addr_ref_unsync_dev);
|
|
/**
|
* __hw_addr_unsync_dev - Remove synchronized addresses from device
|
* @list: address list to remove synchronized addresses from
|
* @dev: device to sync
|
* @unsync: function to call if address should be removed
|
*
|
* Remove all addresses that were added to the device by __hw_addr_sync_dev().
|
* This function is intended to be called from the ndo_stop or ndo_open
|
* functions on devices that require explicit address add/remove
|
* notifications. If the unsync function pointer is NULL then this function
|
* can be used to just reset the sync_cnt for the addresses in the list.
|
**/
|
void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
|
struct net_device *dev,
|
int (*unsync)(struct net_device *,
|
const unsigned char *))
|
{
|
struct netdev_hw_addr *ha, *tmp;
|
|
list_for_each_entry_safe(ha, tmp, &list->list, list) {
|
if (!ha->sync_cnt)
|
continue;
|
|
/* if unsync is defined and fails defer unsyncing address */
|
if (unsync && unsync(dev, ha->addr))
|
continue;
|
|
ha->sync_cnt--;
|
__hw_addr_del_entry(list, ha, false, false);
|
}
|
}
|
EXPORT_SYMBOL(__hw_addr_unsync_dev);
|
|
static void __hw_addr_flush(struct netdev_hw_addr_list *list)
|
{
|
struct netdev_hw_addr *ha, *tmp;
|
|
list_for_each_entry_safe(ha, tmp, &list->list, list) {
|
list_del_rcu(&ha->list);
|
kfree_rcu(ha, rcu_head);
|
}
|
list->count = 0;
|
}
|
|
void __hw_addr_init(struct netdev_hw_addr_list *list)
|
{
|
INIT_LIST_HEAD(&list->list);
|
list->count = 0;
|
}
|
EXPORT_SYMBOL(__hw_addr_init);
|
|
/*
|
* Device addresses handling functions
|
*/
|
|
/**
|
* dev_addr_flush - Flush device address list
|
* @dev: device
|
*
|
* Flush device address list and reset ->dev_addr.
|
*
|
* The caller must hold the rtnl_mutex.
|
*/
|
void dev_addr_flush(struct net_device *dev)
|
{
|
/* rtnl_mutex must be held here */
|
|
__hw_addr_flush(&dev->dev_addrs);
|
dev->dev_addr = NULL;
|
}
|
EXPORT_SYMBOL(dev_addr_flush);
|
|
/**
|
* dev_addr_init - Init device address list
|
* @dev: device
|
*
|
* Init device address list and create the first element,
|
* used by ->dev_addr.
|
*
|
* The caller must hold the rtnl_mutex.
|
*/
|
int dev_addr_init(struct net_device *dev)
|
{
|
unsigned char addr[MAX_ADDR_LEN];
|
struct netdev_hw_addr *ha;
|
int err;
|
|
/* rtnl_mutex must be held here */
|
|
__hw_addr_init(&dev->dev_addrs);
|
memset(addr, 0, sizeof(addr));
|
err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr),
|
NETDEV_HW_ADDR_T_LAN);
|
if (!err) {
|
/*
|
* Get the first (previously created) address from the list
|
* and set dev_addr pointer to this location.
|
*/
|
ha = list_first_entry(&dev->dev_addrs.list,
|
struct netdev_hw_addr, list);
|
dev->dev_addr = ha->addr;
|
}
|
return err;
|
}
|
EXPORT_SYMBOL(dev_addr_init);
|
|
/**
|
* dev_addr_add - Add a device address
|
* @dev: device
|
* @addr: address to add
|
* @addr_type: address type
|
*
|
* Add a device address to the device or increase the reference count if
|
* it already exists.
|
*
|
* The caller must hold the rtnl_mutex.
|
*/
|
int dev_addr_add(struct net_device *dev, const unsigned char *addr,
|
unsigned char addr_type)
|
{
|
int err;
|
|
ASSERT_RTNL();
|
|
err = dev_pre_changeaddr_notify(dev, addr, NULL);
|
if (err)
|
return err;
|
err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type);
|
if (!err)
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_addr_add);
|
|
/**
|
* dev_addr_del - Release a device address.
|
* @dev: device
|
* @addr: address to delete
|
* @addr_type: address type
|
*
|
* Release reference to a device address and remove it from the device
|
* if the reference count drops to zero.
|
*
|
* The caller must hold the rtnl_mutex.
|
*/
|
int dev_addr_del(struct net_device *dev, const unsigned char *addr,
|
unsigned char addr_type)
|
{
|
int err;
|
struct netdev_hw_addr *ha;
|
|
ASSERT_RTNL();
|
|
/*
|
* We can not remove the first address from the list because
|
* dev->dev_addr points to that.
|
*/
|
ha = list_first_entry(&dev->dev_addrs.list,
|
struct netdev_hw_addr, list);
|
if (!memcmp(ha->addr, addr, dev->addr_len) &&
|
ha->type == addr_type && ha->refcount == 1)
|
return -ENOENT;
|
|
err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len,
|
addr_type);
|
if (!err)
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_addr_del);
|
|
/*
|
* Unicast list handling functions
|
*/
|
|
/**
|
* dev_uc_add_excl - Add a global secondary unicast address
|
* @dev: device
|
* @addr: address to add
|
*/
|
int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr)
|
{
|
struct netdev_hw_addr *ha;
|
int err;
|
|
netif_addr_lock_bh(dev);
|
list_for_each_entry(ha, &dev->uc.list, list) {
|
if (!memcmp(ha->addr, addr, dev->addr_len) &&
|
ha->type == NETDEV_HW_ADDR_T_UNICAST) {
|
err = -EEXIST;
|
goto out;
|
}
|
}
|
err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len,
|
NETDEV_HW_ADDR_T_UNICAST, true, false);
|
if (!err)
|
__dev_set_rx_mode(dev);
|
out:
|
netif_addr_unlock_bh(dev);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_uc_add_excl);
|
|
/**
|
* dev_uc_add - Add a secondary unicast address
|
* @dev: device
|
* @addr: address to add
|
*
|
* Add a secondary unicast address to the device or increase
|
* the reference count if it already exists.
|
*/
|
int dev_uc_add(struct net_device *dev, const unsigned char *addr)
|
{
|
int err;
|
|
netif_addr_lock_bh(dev);
|
err = __hw_addr_add(&dev->uc, addr, dev->addr_len,
|
NETDEV_HW_ADDR_T_UNICAST);
|
if (!err)
|
__dev_set_rx_mode(dev);
|
netif_addr_unlock_bh(dev);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_uc_add);
|
|
/**
|
* dev_uc_del - Release secondary unicast address.
|
* @dev: device
|
* @addr: address to delete
|
*
|
* Release reference to a secondary unicast address and remove it
|
* from the device if the reference count drops to zero.
|
*/
|
int dev_uc_del(struct net_device *dev, const unsigned char *addr)
|
{
|
int err;
|
|
netif_addr_lock_bh(dev);
|
err = __hw_addr_del(&dev->uc, addr, dev->addr_len,
|
NETDEV_HW_ADDR_T_UNICAST);
|
if (!err)
|
__dev_set_rx_mode(dev);
|
netif_addr_unlock_bh(dev);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_uc_del);
|
|
/**
|
* dev_uc_sync - Synchronize device's unicast list to another device
|
* @to: destination device
|
* @from: source device
|
*
|
* Add newly added addresses to the destination device and release
|
* addresses that have no users left. The source device must be
|
* locked by netif_addr_lock_bh.
|
*
|
* This function is intended to be called from the dev->set_rx_mode
|
* function of layered software devices. This function assumes that
|
* addresses will only ever be synced to the @to devices and no other.
|
*/
|
int dev_uc_sync(struct net_device *to, struct net_device *from)
|
{
|
int err = 0;
|
|
if (to->addr_len != from->addr_len)
|
return -EINVAL;
|
|
netif_addr_lock(to);
|
err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len);
|
if (!err)
|
__dev_set_rx_mode(to);
|
netif_addr_unlock(to);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_uc_sync);
|
|
/**
|
* dev_uc_sync_multiple - Synchronize device's unicast list to another
|
* device, but allow for multiple calls to sync to multiple devices.
|
* @to: destination device
|
* @from: source device
|
*
|
* Add newly added addresses to the destination device and release
|
* addresses that have been deleted from the source. The source device
|
* must be locked by netif_addr_lock_bh.
|
*
|
* This function is intended to be called from the dev->set_rx_mode
|
* function of layered software devices. It allows for a single source
|
* device to be synced to multiple destination devices.
|
*/
|
int dev_uc_sync_multiple(struct net_device *to, struct net_device *from)
|
{
|
int err = 0;
|
|
if (to->addr_len != from->addr_len)
|
return -EINVAL;
|
|
netif_addr_lock(to);
|
err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len);
|
if (!err)
|
__dev_set_rx_mode(to);
|
netif_addr_unlock(to);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_uc_sync_multiple);
|
|
/**
|
* dev_uc_unsync - Remove synchronized addresses from the destination device
|
* @to: destination device
|
* @from: source device
|
*
|
* Remove all addresses that were added to the destination device by
|
* dev_uc_sync(). This function is intended to be called from the
|
* dev->stop function of layered software devices.
|
*/
|
void dev_uc_unsync(struct net_device *to, struct net_device *from)
|
{
|
if (to->addr_len != from->addr_len)
|
return;
|
|
/* netif_addr_lock_bh() uses lockdep subclass 0, this is okay for two
|
* reasons:
|
* 1) This is always called without any addr_list_lock, so as the
|
* outermost one here, it must be 0.
|
* 2) This is called by some callers after unlinking the upper device,
|
* so the dev->lower_level becomes 1 again.
|
* Therefore, the subclass for 'from' is 0, for 'to' is either 1 or
|
* larger.
|
*/
|
netif_addr_lock_bh(from);
|
netif_addr_lock(to);
|
__hw_addr_unsync(&to->uc, &from->uc, to->addr_len);
|
__dev_set_rx_mode(to);
|
netif_addr_unlock(to);
|
netif_addr_unlock_bh(from);
|
}
|
EXPORT_SYMBOL(dev_uc_unsync);
|
|
/**
|
* dev_uc_flush - Flush unicast addresses
|
* @dev: device
|
*
|
* Flush unicast addresses.
|
*/
|
void dev_uc_flush(struct net_device *dev)
|
{
|
netif_addr_lock_bh(dev);
|
__hw_addr_flush(&dev->uc);
|
netif_addr_unlock_bh(dev);
|
}
|
EXPORT_SYMBOL(dev_uc_flush);
|
|
/**
|
* dev_uc_flush - Init unicast address list
|
* @dev: device
|
*
|
* Init unicast address list.
|
*/
|
void dev_uc_init(struct net_device *dev)
|
{
|
__hw_addr_init(&dev->uc);
|
}
|
EXPORT_SYMBOL(dev_uc_init);
|
|
/*
|
* Multicast list handling functions
|
*/
|
|
/**
|
* dev_mc_add_excl - Add a global secondary multicast address
|
* @dev: device
|
* @addr: address to add
|
*/
|
int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr)
|
{
|
struct netdev_hw_addr *ha;
|
int err;
|
|
netif_addr_lock_bh(dev);
|
list_for_each_entry(ha, &dev->mc.list, list) {
|
if (!memcmp(ha->addr, addr, dev->addr_len) &&
|
ha->type == NETDEV_HW_ADDR_T_MULTICAST) {
|
err = -EEXIST;
|
goto out;
|
}
|
}
|
err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len,
|
NETDEV_HW_ADDR_T_MULTICAST, true, false);
|
if (!err)
|
__dev_set_rx_mode(dev);
|
out:
|
netif_addr_unlock_bh(dev);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_mc_add_excl);
|
|
static int __dev_mc_add(struct net_device *dev, const unsigned char *addr,
|
bool global)
|
{
|
int err;
|
|
netif_addr_lock_bh(dev);
|
err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len,
|
NETDEV_HW_ADDR_T_MULTICAST, global, false, 0);
|
if (!err)
|
__dev_set_rx_mode(dev);
|
netif_addr_unlock_bh(dev);
|
return err;
|
}
|
/**
|
* dev_mc_add - Add a multicast address
|
* @dev: device
|
* @addr: address to add
|
*
|
* Add a multicast address to the device or increase
|
* the reference count if it already exists.
|
*/
|
int dev_mc_add(struct net_device *dev, const unsigned char *addr)
|
{
|
return __dev_mc_add(dev, addr, false);
|
}
|
EXPORT_SYMBOL(dev_mc_add);
|
|
/**
|
* dev_mc_add_global - Add a global multicast address
|
* @dev: device
|
* @addr: address to add
|
*
|
* Add a global multicast address to the device.
|
*/
|
int dev_mc_add_global(struct net_device *dev, const unsigned char *addr)
|
{
|
return __dev_mc_add(dev, addr, true);
|
}
|
EXPORT_SYMBOL(dev_mc_add_global);
|
|
static int __dev_mc_del(struct net_device *dev, const unsigned char *addr,
|
bool global)
|
{
|
int err;
|
|
netif_addr_lock_bh(dev);
|
err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len,
|
NETDEV_HW_ADDR_T_MULTICAST, global, false);
|
if (!err)
|
__dev_set_rx_mode(dev);
|
netif_addr_unlock_bh(dev);
|
return err;
|
}
|
|
/**
|
* dev_mc_del - Delete a multicast address.
|
* @dev: device
|
* @addr: address to delete
|
*
|
* Release reference to a multicast address and remove it
|
* from the device if the reference count drops to zero.
|
*/
|
int dev_mc_del(struct net_device *dev, const unsigned char *addr)
|
{
|
return __dev_mc_del(dev, addr, false);
|
}
|
EXPORT_SYMBOL(dev_mc_del);
|
|
/**
|
* dev_mc_del_global - Delete a global multicast address.
|
* @dev: device
|
* @addr: address to delete
|
*
|
* Release reference to a multicast address and remove it
|
* from the device if the reference count drops to zero.
|
*/
|
int dev_mc_del_global(struct net_device *dev, const unsigned char *addr)
|
{
|
return __dev_mc_del(dev, addr, true);
|
}
|
EXPORT_SYMBOL(dev_mc_del_global);
|
|
/**
|
* dev_mc_sync - Synchronize device's multicast list to another device
|
* @to: destination device
|
* @from: source device
|
*
|
* Add newly added addresses to the destination device and release
|
* addresses that have no users left. The source device must be
|
* locked by netif_addr_lock_bh.
|
*
|
* This function is intended to be called from the ndo_set_rx_mode
|
* function of layered software devices.
|
*/
|
int dev_mc_sync(struct net_device *to, struct net_device *from)
|
{
|
int err = 0;
|
|
if (to->addr_len != from->addr_len)
|
return -EINVAL;
|
|
netif_addr_lock(to);
|
err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len);
|
if (!err)
|
__dev_set_rx_mode(to);
|
netif_addr_unlock(to);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_mc_sync);
|
|
/**
|
* dev_mc_sync_multiple - Synchronize device's multicast list to another
|
* device, but allow for multiple calls to sync to multiple devices.
|
* @to: destination device
|
* @from: source device
|
*
|
* Add newly added addresses to the destination device and release
|
* addresses that have no users left. The source device must be
|
* locked by netif_addr_lock_bh.
|
*
|
* This function is intended to be called from the ndo_set_rx_mode
|
* function of layered software devices. It allows for a single
|
* source device to be synced to multiple destination devices.
|
*/
|
int dev_mc_sync_multiple(struct net_device *to, struct net_device *from)
|
{
|
int err = 0;
|
|
if (to->addr_len != from->addr_len)
|
return -EINVAL;
|
|
netif_addr_lock(to);
|
err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len);
|
if (!err)
|
__dev_set_rx_mode(to);
|
netif_addr_unlock(to);
|
return err;
|
}
|
EXPORT_SYMBOL(dev_mc_sync_multiple);
|
|
/**
|
* dev_mc_unsync - Remove synchronized addresses from the destination device
|
* @to: destination device
|
* @from: source device
|
*
|
* Remove all addresses that were added to the destination device by
|
* dev_mc_sync(). This function is intended to be called from the
|
* dev->stop function of layered software devices.
|
*/
|
void dev_mc_unsync(struct net_device *to, struct net_device *from)
|
{
|
if (to->addr_len != from->addr_len)
|
return;
|
|
/* See the above comments inside dev_uc_unsync(). */
|
netif_addr_lock_bh(from);
|
netif_addr_lock(to);
|
__hw_addr_unsync(&to->mc, &from->mc, to->addr_len);
|
__dev_set_rx_mode(to);
|
netif_addr_unlock(to);
|
netif_addr_unlock_bh(from);
|
}
|
EXPORT_SYMBOL(dev_mc_unsync);
|
|
/**
|
* dev_mc_flush - Flush multicast addresses
|
* @dev: device
|
*
|
* Flush multicast addresses.
|
*/
|
void dev_mc_flush(struct net_device *dev)
|
{
|
netif_addr_lock_bh(dev);
|
__hw_addr_flush(&dev->mc);
|
netif_addr_unlock_bh(dev);
|
}
|
EXPORT_SYMBOL(dev_mc_flush);
|
|
/**
|
* dev_mc_init - Init multicast address list
|
* @dev: device
|
*
|
* Init multicast address list.
|
*/
|
void dev_mc_init(struct net_device *dev)
|
{
|
__hw_addr_init(&dev->mc);
|
}
|
EXPORT_SYMBOL(dev_mc_init);
|
