Commit 7390609b authored Feb 06, 2023 by Michael Walle Committed by Greg Kroah-Hartman Feb 06, 2023

net: add helper eth_addr_add()



Add a helper to add an offset to a ethernet address. This comes in handy
if you have a base ethernet address for multiple interfaces.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230206134356.839737-9-srinivas.kandagatla@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 2e8dc541

include/linux/etherdevice.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr)
		u64_to_ether_addr(u, addr);
		}

		/**
		* eth_addr_add() - Add (or subtract) an offset to/from the given MAC address.
		*
		* @offset: Offset to add.
		* @addr: Pointer to a six-byte array containing Ethernet address to increment.
		*/
		static inline void eth_addr_add(u8 *addr, long offset)
		{
		u64 u = ether_addr_to_u64(addr);

		u += offset;
		u64_to_ether_addr(u, addr);
		}

		/**
		* is_etherdev_addr - Tell if given Ethernet address belongs to the device.
		* @dev: Pointer to a device structure