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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: Yan Burman <yanb@mellanox.com>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yan Burman 2012-12-13 05:20:59 +00:00 committed by David S. Miller
parent 7bdc1b4aba
commit dc2e57340d
1 changed files with 14 additions and 2 deletions
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16
include/uapi/linux/ethtool.h
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@ -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