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net: ethtool: Allow passing a phy index for some commands

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Some netlink commands are target towards ethernet PHYs, to control some
of their features. As there's several such commands, add the ability to
pass a PHY index in the ethnl request, which will populate the generic
ethnl_req_info with the passed phy_index.

Add a helper that netlink command handlers need to use to grab the
targeted PHY from the req_info. This helper needs to hold rtnl_lock()
while interacting with the PHY, as it may be removed at any point.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxime Chevallier
2024-08-21 17:09:59 +02:00
committed by David S. Miller
parent 0a2f7de0f3
commit c15e065b46
4 changed files with 91 additions and 2 deletions
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1
include/uapi/linux/ethtool_netlink.h
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@@ -134,6 +134,7 @@ enum {
ETHTOOL_A_HEADER_DEV_INDEX, /* u32 */
ETHTOOL_A_HEADER_DEV_NAME, /* string */
ETHTOOL_A_HEADER_FLAGS, /* u32 - ETHTOOL_FLAG_* */
ETHTOOL_A_HEADER_PHY_INDEX, /* u32 */
/* add new constants above here */
__ETHTOOL_A_HEADER_CNT,