ethtool: Add comments for valid use of flow types

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 00334ee..b67af60 100644 (file)
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -841,21 +841,21 @@ struct ethtool_ops {
 #define WAKE_MAGICSECURE       (1 << 6) /* only meaningful if WAKE_MAGIC */
 
 /* L3-L4 network traffic flow types */
-#define        TCP_V4_FLOW     0x01
-#define        UDP_V4_FLOW     0x02
-#define        SCTP_V4_FLOW    0x03
-#define        AH_ESP_V4_FLOW  0x04
-#define        TCP_V6_FLOW     0x05
-#define        UDP_V6_FLOW     0x06
-#define        SCTP_V6_FLOW    0x07
-#define        AH_ESP_V6_FLOW  0x08
-#define        AH_V4_FLOW      0x09
-#define        ESP_V4_FLOW     0x0a
-#define        AH_V6_FLOW      0x0b
-#define        ESP_V6_FLOW     0x0c
-#define        IP_USER_FLOW    0x0d
-#define        IPV4_FLOW       0x10
-#define        IPV6_FLOW       0x11
+#define        TCP_V4_FLOW     0x01    /* hash or spec (tcp_ip4_spec) */
+#define        UDP_V4_FLOW     0x02    /* hash or spec (udp_ip4_spec) */
+#define        SCTP_V4_FLOW    0x03    /* hash or spec (sctp_ip4_spec) */
+#define        AH_ESP_V4_FLOW  0x04    /* hash only */
+#define        TCP_V6_FLOW     0x05    /* hash only */
+#define        UDP_V6_FLOW     0x06    /* hash only */
+#define        SCTP_V6_FLOW    0x07    /* hash only */
+#define        AH_ESP_V6_FLOW  0x08    /* hash only */
+#define        AH_V4_FLOW      0x09    /* hash or spec (ah_ip4_spec) */
+#define        ESP_V4_FLOW     0x0a    /* hash or spec (esp_ip4_spec) */
+#define        AH_V6_FLOW      0x0b    /* hash only */
+#define        ESP_V6_FLOW     0x0c    /* hash only */
+#define        IP_USER_FLOW    0x0d    /* spec only (usr_ip4_spec) */
+#define        IPV4_FLOW       0x10    /* hash only */
+#define        IPV6_FLOW       0x11    /* hash only */
 
 /* L3-L4 network traffic flow hash options */
 #define        RXH_L2DA        (1 << 1)