4543fbefe6
A few drivers use dev_uc_sync/unsync to synchronize the address lists from master down to slave/lower devices. In some cases (bond/team) a single address list is synched down to multiple devices. At the time of unsync, we have a leak in these lower devices, because "synced" is treated as a boolean and the address will not be unsynced for anything after the first device/call. Treat "synced" as a count (same as refcount) and allow all unsync calls to work. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
729 lines
17 KiB
C
729 lines
17 KiB
C
/*
|
|
* net/core/dev_addr_lists.c - Functions for handling net device lists
|
|
* Copyright (c) 2010 Jiri Pirko <jpirko@redhat.com>
|
|
*
|
|
* This file contains functions for working with unicast, multicast and device
|
|
* addresses lists.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/export.h>
|
|
#include <linux/list.h>
|
|
|
|
/*
|
|
* General list handling functions
|
|
*/
|
|
|
|
static int __hw_addr_create_ex(struct netdev_hw_addr_list *list,
|
|
const unsigned char *addr, int addr_len,
|
|
unsigned char addr_type, bool global)
|
|
{
|
|
struct netdev_hw_addr *ha;
|
|
int alloc_size;
|
|
|
|
alloc_size = sizeof(*ha);
|
|
if (alloc_size < L1_CACHE_BYTES)
|
|
alloc_size = L1_CACHE_BYTES;
|
|
ha = kmalloc(alloc_size, GFP_ATOMIC);
|
|
if (!ha)
|
|
return -ENOMEM;
|
|
memcpy(ha->addr, addr, addr_len);
|
|
ha->type = addr_type;
|
|
ha->refcount = 1;
|
|
ha->global_use = global;
|
|
ha->synced = 0;
|
|
list_add_tail_rcu(&ha->list, &list->list);
|
|
list->count++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
|
|
const unsigned char *addr, int addr_len,
|
|
unsigned char addr_type, bool global)
|
|
{
|
|
struct netdev_hw_addr *ha;
|
|
|
|
if (addr_len > MAX_ADDR_LEN)
|
|
return -EINVAL;
|
|
|
|
list_for_each_entry(ha, &list->list, list) {
|
|
if (!memcmp(ha->addr, addr, addr_len) &&
|
|
ha->type == addr_type) {
|
|
if (global) {
|
|
/* check if addr is already used as global */
|
|
if (ha->global_use)
|
|
return 0;
|
|
else
|
|
ha->global_use = true;
|
|
}
|
|
ha->refcount++;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return __hw_addr_create_ex(list, addr, addr_len, addr_type, global);
|
|
}
|
|
|
|
static int __hw_addr_add(struct netdev_hw_addr_list *list,
|
|
const unsigned char *addr, int addr_len,
|
|
unsigned char addr_type)
|
|
{
|
|
return __hw_addr_add_ex(list, addr, addr_len, addr_type, false);
|
|
}
|
|
|
|
static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
|
|
const unsigned char *addr, int addr_len,
|
|
unsigned char addr_type, bool global)
|
|
{
|
|
struct netdev_hw_addr *ha;
|
|
|
|
list_for_each_entry(ha, &list->list, list) {
|
|
if (!memcmp(ha->addr, addr, addr_len) &&
|
|
(ha->type == addr_type || !addr_type)) {
|
|
if (global) {
|
|
if (!ha->global_use)
|
|
break;
|
|
else
|
|
ha->global_use = false;
|
|
}
|
|
if (--ha->refcount)
|
|
return 0;
|
|
list_del_rcu(&ha->list);
|
|
kfree_rcu(ha, rcu_head);
|
|
list->count--;
|
|
return 0;
|
|
}
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
|
|
static int __hw_addr_del(struct netdev_hw_addr_list *list,
|
|
const unsigned char *addr, int addr_len,
|
|
unsigned char addr_type)
|
|
{
|
|
return __hw_addr_del_ex(list, addr, addr_len, addr_type, false);
|
|
}
|
|
|
|
int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
|
|
struct netdev_hw_addr_list *from_list,
|
|
int addr_len, unsigned char addr_type)
|
|
{
|
|
int err;
|
|
struct netdev_hw_addr *ha, *ha2;
|
|
unsigned char type;
|
|
|
|
list_for_each_entry(ha, &from_list->list, list) {
|
|
type = addr_type ? addr_type : ha->type;
|
|
err = __hw_addr_add(to_list, ha->addr, addr_len, type);
|
|
if (err)
|
|
goto unroll;
|
|
}
|
|
return 0;
|
|
|
|
unroll:
|
|
list_for_each_entry(ha2, &from_list->list, list) {
|
|
if (ha2 == ha)
|
|
break;
|
|
type = addr_type ? addr_type : ha2->type;
|
|
__hw_addr_del(to_list, ha2->addr, addr_len, type);
|
|
}
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(__hw_addr_add_multiple);
|
|
|
|
void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
|
|
struct netdev_hw_addr_list *from_list,
|
|
int addr_len, unsigned char addr_type)
|
|
{
|
|
struct netdev_hw_addr *ha;
|
|
unsigned char type;
|
|
|
|
list_for_each_entry(ha, &from_list->list, list) {
|
|
type = addr_type ? addr_type : ha->type;
|
|
__hw_addr_del(to_list, ha->addr, addr_len, type);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(__hw_addr_del_multiple);
|
|
|
|
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;
|
|
|
|
list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
|
|
if (!ha->synced) {
|
|
err = __hw_addr_add(to_list, ha->addr,
|
|
addr_len, ha->type);
|
|
if (err)
|
|
break;
|
|
ha->synced++;
|
|
ha->refcount++;
|
|
} else if (ha->refcount == 1) {
|
|
__hw_addr_del(to_list, ha->addr, addr_len, ha->type);
|
|
__hw_addr_del(from_list, ha->addr, addr_len, ha->type);
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
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)
|
|
{
|
|
struct netdev_hw_addr *ha, *tmp;
|
|
|
|
list_for_each_entry_safe(ha, tmp, &from_list->list, list) {
|
|
if (ha->synced) {
|
|
__hw_addr_del(to_list, ha->addr,
|
|
addr_len, ha->type);
|
|
ha->synced--;
|
|
__hw_addr_del(from_list, ha->addr,
|
|
addr_len, ha->type);
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(__hw_addr_unsync);
|
|
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL(__hw_addr_flush);
|
|
|
|
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 = __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);
|
|
|
|
/**
|
|
* dev_addr_add_multiple - Add device addresses from another device
|
|
* @to_dev: device to which addresses will be added
|
|
* @from_dev: device from which addresses will be added
|
|
* @addr_type: address type - 0 means type will be used from from_dev
|
|
*
|
|
* Add device addresses of the one device to another.
|
|
**
|
|
* The caller must hold the rtnl_mutex.
|
|
*/
|
|
int dev_addr_add_multiple(struct net_device *to_dev,
|
|
struct net_device *from_dev,
|
|
unsigned char addr_type)
|
|
{
|
|
int err;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (from_dev->addr_len != to_dev->addr_len)
|
|
return -EINVAL;
|
|
err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs,
|
|
to_dev->addr_len, addr_type);
|
|
if (!err)
|
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(dev_addr_add_multiple);
|
|
|
|
/**
|
|
* dev_addr_del_multiple - Delete device addresses by another device
|
|
* @to_dev: device where the addresses will be deleted
|
|
* @from_dev: device supplying the addresses to be deleted
|
|
* @addr_type: address type - 0 means type will be used from from_dev
|
|
*
|
|
* Deletes addresses in to device by the list of addresses in from device.
|
|
*
|
|
* The caller must hold the rtnl_mutex.
|
|
*/
|
|
int dev_addr_del_multiple(struct net_device *to_dev,
|
|
struct net_device *from_dev,
|
|
unsigned char addr_type)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
if (from_dev->addr_len != to_dev->addr_len)
|
|
return -EINVAL;
|
|
__hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs,
|
|
to_dev->addr_len, addr_type);
|
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(dev_addr_del_multiple);
|
|
|
|
/*
|
|
* 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);
|
|
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.
|
|
*/
|
|
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_nested(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_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(from);
|
|
netif_addr_lock_nested(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);
|
|
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);
|
|
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);
|
|
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 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 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_nested(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_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;
|
|
|
|
netif_addr_lock_bh(from);
|
|
netif_addr_lock_nested(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_flush - 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);
|