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Commit dc2e5734 authored by Yan Burman's avatar Yan Burman Committed by David S. Miller
Browse files

net: ethool: Document struct ethtool_flow_ext 



Add documentation for struct ethtool_flow_ext especially in regard
to what flags are needed for which fields.

Signed-off-by: default avatarYan Burman <yanb@mellanox.com>
Reviewed-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7bdc1b4a

include/uapi/linux/ethtool.h

+14 −2
Original line number Diff line number Diff line
@@ -503,9 +503,20 @@ union ethtool_flow_union { 
	__u8					hdata[52];

};



/**

 * struct ethtool_flow_ext - additional RX flow fields

 * @h_dest: destination MAC address

 * @vlan_etype: VLAN EtherType

 * @vlan_tci: VLAN tag control information

 * @data: user defined data

 *

 * Note, @vlan_etype, @vlan_tci, and @data are only valid if %FLOW_EXT

 * is set in &struct ethtool_rx_flow_spec @flow_type.

 * @h_dest is valid if %FLOW_MAC_EXT is set.

 */

struct ethtool_flow_ext {

	__u8		padding[2];

	unsigned char	h_dest[ETH_ALEN];	/* destination eth addr	*/

	unsigned char	h_dest[ETH_ALEN];

	__be16		vlan_etype;

	__be16		vlan_tci;

	__be32		data[2];
@@ -519,7 +530,8 @@ struct ethtool_flow_ext { 
 * @m_u: Masks for flow field bits to be matched

 * @m_ext: Masks for additional field bits to be matched

 *	Note, all additional fields must be ignored unless @flow_type

 *	includes the %FLOW_EXT flag.

 *	includes the %FLOW_EXT or %FLOW_MAC_EXT flag

 *	(see &struct ethtool_flow_ext description).

 * @ring_cookie: RX ring/queue index to deliver to, or %RX_CLS_FLOW_DISC

 *	if packets should be discarded

 * @location: Location of rule in the table.  Locations must be