From 178331743ca860561f60d04a7797a2fce13f0784 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Tue, 8 Jul 2025 15:06:39 -0700 Subject: ethtool: rss: report which fields are configured for hashing Implement ETHTOOL_GRXFH over Netlink. The number of flow types is reasonable (around 20) so report all of them at once for simplicity. Do not maintain the flow ID mapping with ioctl at the uAPI level. This gives us a chance to clean up the confusion that come from RxNFC vs RxFH (flow direction vs hashing) in the ioctl. Try to align with the names used in ethtool CLI, they seem to have stood the test of time just fine. One annoyance is that we still call L4 ports the weird names, but I guess they also apply to IPSec (where they cover the SPI) so it is what it is. $ ynl --family ethtool --dump rss-get { "header": { "dev-index": 1, "dev-name": "enp1s0" }, "hfunc": 1, "hkey": b"...", "indir": [0, 1, ...], "flow-hash": { "ether": {"l2da"}, "ah-esp4": {"ip-src", "ip-dst"}, "ah-esp6": {"ip-src", "ip-dst"}, "ah4": {"ip-src", "ip-dst"}, "ah6": {"ip-src", "ip-dst"}, "esp4": {"ip-src", "ip-dst"}, "esp6": {"ip-src", "ip-dst"}, "ip4": {"ip-src", "ip-dst"}, "ip6": {"ip-src", "ip-dst"}, "sctp4": {"ip-src", "ip-dst"}, "sctp6": {"ip-src", "ip-dst"}, "udp4": {"ip-src", "ip-dst"}, "udp6": {"ip-src", "ip-dst"} "tcp4": {"l4-b-0-1", "l4-b-2-3", "ip-src", "ip-dst"}, "tcp6": {"l4-b-0-1", "l4-b-2-3", "ip-src", "ip-dst"}, }, } Link: https://patch.msgid.link/20250708220640.2738464-5-kuba@kernel.org Signed-off-by: Jakub Kicinski --- include/uapi/linux/ethtool_netlink_generated.h | 34 ++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/ethtool_netlink_generated.h b/include/uapi/linux/ethtool_netlink_generated.h index 8f30ffa1cd14..96027e26ffba 100644 --- a/include/uapi/linux/ethtool_netlink_generated.h +++ b/include/uapi/linux/ethtool_netlink_generated.h @@ -678,6 +678,39 @@ enum { ETHTOOL_A_PSE_MAX = (__ETHTOOL_A_PSE_CNT - 1) }; +enum { + ETHTOOL_A_FLOW_ETHER = 1, + ETHTOOL_A_FLOW_IP4, + ETHTOOL_A_FLOW_IP6, + ETHTOOL_A_FLOW_TCP4, + ETHTOOL_A_FLOW_TCP6, + ETHTOOL_A_FLOW_UDP4, + ETHTOOL_A_FLOW_UDP6, + ETHTOOL_A_FLOW_SCTP4, + ETHTOOL_A_FLOW_SCTP6, + ETHTOOL_A_FLOW_AH4, + ETHTOOL_A_FLOW_AH6, + ETHTOOL_A_FLOW_ESP4, + ETHTOOL_A_FLOW_ESP6, + ETHTOOL_A_FLOW_AH_ESP4, + ETHTOOL_A_FLOW_AH_ESP6, + ETHTOOL_A_FLOW_GTPU4, + ETHTOOL_A_FLOW_GTPU6, + ETHTOOL_A_FLOW_GTPC4, + ETHTOOL_A_FLOW_GTPC6, + ETHTOOL_A_FLOW_GTPC_TEID4, + ETHTOOL_A_FLOW_GTPC_TEID6, + ETHTOOL_A_FLOW_GTPU_EH4, + ETHTOOL_A_FLOW_GTPU_EH6, + ETHTOOL_A_FLOW_GTPU_UL4, + ETHTOOL_A_FLOW_GTPU_UL6, + ETHTOOL_A_FLOW_GTPU_DL4, + ETHTOOL_A_FLOW_GTPU_DL6, + + __ETHTOOL_A_FLOW_CNT, + ETHTOOL_A_FLOW_MAX = (__ETHTOOL_A_FLOW_CNT - 1) +}; + enum { ETHTOOL_A_RSS_UNSPEC, ETHTOOL_A_RSS_HEADER, @@ -687,6 +720,7 @@ enum { ETHTOOL_A_RSS_HKEY, ETHTOOL_A_RSS_INPUT_XFRM, ETHTOOL_A_RSS_START_CONTEXT, + ETHTOOL_A_RSS_FLOW_HASH, __ETHTOOL_A_RSS_CNT, ETHTOOL_A_RSS_MAX = (__ETHTOOL_A_RSS_CNT - 1) -- cgit v1.2.3