linux/net/ethtool
Jakub Kicinski 178331743c 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 <kuba@kernel.org>
History 2025-07-10 17:57:49 -07:00
..
bitset.c ethtool: Fix wrong mod state in case of verbose and no_mask bitset 2024-12-04 18:54:43 -08:00
bitset.h ethtool: add ethnl_parse_bitset() helper 2020-03-12 15:32:32 -07:00
cabletest.c net: move misc netdev_lock flavors to a separate header 2025-03-08 09:06:50 -08:00
channels.c ethtool: refactor checking max channels 2024-08-09 21:52:13 -07:00
cmis.h ethtool: cmis_cdb: Fix incorrect read / write length extension 2025-04-10 14:32:43 +02:00
cmis_cdb.c ethtool: cmis_cdb: use correct rpl size in ethtool_cmis_module_poll() 2025-04-11 18:41:19 -07:00
cmis_fw_update.c net: move misc netdev_lock flavors to a separate header 2025-03-08 09:06:50 -08:00
coalesce.c net: ethtool: Fix the panic caused by dev being null when dumping coalesce 2024-07-01 13:43:50 +01:00
common.c net: ethtool: move get_rxfh callback under the rss_lock 2025-06-30 08:41:25 -07:00
common.h net: ethtool: rss: add notifications 2025-06-25 15:24:14 -07:00
debug.c ethtool: netlink: always pass genl_info to .prepare_data 2023-08-15 15:01:03 -07:00
eee.c net: ethtool: eee: Remove legacy _u32 from keee 2024-02-28 12:18:05 +00:00
eeprom.c ethtool: move firmware flashing flag to struct ethtool_netdev_state 2024-07-04 15:45:15 -07:00
features.c net: move misc netdev_lock flavors to a separate header 2025-03-08 09:06:50 -08:00
fec.c ethtool: netlink: always pass genl_info to .prepare_data 2023-08-15 15:01:03 -07:00
ioctl.c ethtool: rss: report which fields are configured for hashing 2025-07-10 17:57:49 -07:00
linkinfo.c Revert "net: ethtool: Avoid thousands of -Wflex-array-member-not-at-end warnings" 2024-11-18 18:52:11 -08:00
linkmodes.c Revert "net: ethtool: Avoid thousands of -Wflex-array-member-not-at-end warnings" 2024-11-18 18:52:11 -08:00
linkstate.c net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device 2025-03-04 17:12:01 -08:00
Makefile net: ethtool: Add support for tsconfig command to get/set hwtstamp config 2024-12-16 12:51:41 +00:00
mm.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
module.c net: move misc netdev_lock flavors to a separate header 2025-03-08 09:06:50 -08:00
module_fw.h ethtool: Add ability to flash transceiver modules' firmware 2024-06-28 10:48:23 +01:00
netlink.c net: ethtool: fix leaking netdev ref if ethnl_default_parse() failed 2025-07-01 17:27:53 -07:00
netlink.h net: ethtool: avoid OOB accesses in PAUSE_SET 2025-06-30 08:32:37 -07:00
pause.c net: ethtool: avoid OOB accesses in PAUSE_SET 2025-06-30 08:32:37 -07:00
phc_vclocks.c ethtool: netlink: always pass genl_info to .prepare_data 2023-08-15 15:01:03 -07:00
phy.c net: ethtool: phy: Convert the PHY_GET command to generic phy dump 2025-05-05 17:17:40 -07:00
plca.c net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device 2025-03-04 17:12:01 -08:00
privflags.c ethtool: netlink: always pass genl_info to .prepare_data 2023-08-15 15:01:03 -07:00
pse-pd.c ethtool: pse-pd: Add missing linux/export.h include 2025-06-23 13:13:01 -07:00
rings.c net: ethtool: fix ioctl confusing drivers about desired HDS user config 2025-02-24 14:15:42 -08:00
rss.c ethtool: rss: report which fields are configured for hashing 2025-07-10 17:57:49 -07:00
stats.c net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device 2025-03-04 17:12:01 -08:00
strset.c net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device 2025-03-04 17:12:01 -08:00
ts.h net: ethtool: tsinfo: Enhance tsinfo to support several hwtstamp by net topology 2024-12-16 12:51:41 +00:00
tsconfig.c net: ethtool: tsconfig: Fix netlink type of hwtstamp flags 2025-02-06 16:35:21 -08:00
tsinfo.c net: Add support for providing the PTP hardware source in tsinfo 2025-05-22 15:32:00 +02:00
tunnels.c genetlink: use attrs from struct genl_info 2023-08-15 15:00:45 -07:00
wol.c net: move ethtool-related netdev state into its own struct 2024-06-28 18:53:17 -07:00