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net: create netdev->dev_addr assignment helpers

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Recent work on converting address list to a tree made it obvious
we need an abstraction around writing netdev->dev_addr. Without
such abstraction updating the main device address is invisible
to the core.

Introduce a number of helpers which for now just wrap memcpy()
but in the future can make necessary changes to the address
tree.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2021-09-02 11:10:37 -07:00 committed by David S. Miller
parent 8c9bc823ef
commit 48eab831ae
2 changed files with 30 additions and 0 deletions
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12
include/linux/etherdevice.h
View File

@ -299,6 +299,18 @@ static inline void ether_addr_copy(u8 *dst, const u8 *src)
#endif
}
/**
* eth_hw_addr_set - Assign Ethernet address to a net_device
* @dev: pointer to net_device structure
* @addr: address to assign
*
* Assign given address to the net_device, addr_assign_type is not changed.
*/
static inline void eth_hw_addr_set(struct net_device *dev, const u8 *addr)
{
ether_addr_copy(dev->dev_addr, addr);
}
/**
* eth_hw_addr_inherit - Copy dev_addr from another net_device
* @dst: pointer to net_device to copy dev_addr to

18
include/linux/netdevice.h
View File

@ -4641,6 +4641,24 @@ void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
void __hw_addr_init(struct netdev_hw_addr_list *list);
/* Functions used for device addresses handling */
static inline void
__dev_addr_set(struct net_device *dev, const u8 *addr, size_t len)
{
memcpy(dev->dev_addr, addr, len);
}
static inline void dev_addr_set(struct net_device *dev, const u8 *addr)
{
__dev_addr_set(dev, addr, dev->addr_len);
}
static inline void
dev_addr_mod(struct net_device *dev, unsigned int offset,
const u8 *addr, size_t len)
{
memcpy(&dev->dev_addr[offset], addr, len);
}
int dev_addr_add(struct net_device *dev, const unsigned char *addr,
unsigned char addr_type);
int dev_addr_del(struct net_device *dev, const unsigned char *addr,