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net: etherdevice: add address inherit helper

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Some etherdevices inherit their address from a parent or
master device. The addr_assign_type should be updated along
with the address in these cases.  Adding a helper function
to simplify this.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bjørn Mork
2013-08-30 18:08:44 +02:00
committed by David S. Miller
parent 5a17a390de
commit 83a093b486
1 changed files with 15 additions and 0 deletions
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15
include/linux/etherdevice.h
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@@ -198,6 +198,21 @@ static inline void eth_hw_addr_random(struct net_device *dev)
eth_random_addr(dev->dev_addr); eth_random_addr(dev->dev_addr);
} }
/**
* eth_hw_addr_inherit - Copy dev_addr from another net_device
* @dst: pointer to net_device to copy dev_addr to
* @src: pointer to net_device to copy dev_addr from
*
* Copy the Ethernet address from one net_device to another along with
* the address attributes (addr_assign_type).
*/
static inline void eth_hw_addr_inherit(struct net_device *dst,
struct net_device *src)
{
dst->addr_assign_type = src->addr_assign_type;
memcpy(dst->dev_addr, src->dev_addr, ETH_ALEN);
}
/** /**
* compare_ether_addr - Compare two Ethernet addresses * compare_ether_addr - Compare two Ethernet addresses
* @addr1: Pointer to a six-byte array containing the Ethernet address * @addr1: Pointer to a six-byte array containing the Ethernet address