From 33d97a07b3ae6fa713919de4e1864ca04fff8f80 Mon Sep 17 00:00:00 2001 From: Yuyang Huang Date: Tue, 7 Jan 2025 20:43:55 +0900 Subject: netlink: add IPv6 anycast join/leave notifications MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This change introduces a mechanism for notifying userspace applications about changes to IPv6 anycast addresses via netlink. It includes: * Addition and deletion of IPv6 anycast addresses are reported using RTM_NEWANYCAST and RTM_DELANYCAST. * A new netlink group (RTNLGRP_IPV6_ACADDR) for subscribing to these notifications. This enables user space applications(e.g. ip monitor) to efficiently track anycast addresses through netlink messages, improving metrics collection and system monitoring. It also unlocks the potential for advanced anycast management in user space, such as hardware offload control and fine grained network control. Cc: Maciej Żenczykowski Cc: Lorenzo Colitti Signed-off-by: Yuyang Huang Reviewed-by: David Ahern Link: https://patch.msgid.link/20250107114355.1766086-1-yuyanghuang@google.com Signed-off-by: Paolo Abeni --- include/uapi/linux/rtnetlink.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h index 5ee94c511a28..66c3903d29cf 100644 --- a/include/uapi/linux/rtnetlink.h +++ b/include/uapi/linux/rtnetlink.h @@ -100,7 +100,11 @@ enum { RTM_GETMULTICAST, #define RTM_GETMULTICAST RTM_GETMULTICAST - RTM_GETANYCAST = 62, + RTM_NEWANYCAST = 60, +#define RTM_NEWANYCAST RTM_NEWANYCAST + RTM_DELANYCAST, +#define RTM_DELANYCAST RTM_DELANYCAST + RTM_GETANYCAST, #define RTM_GETANYCAST RTM_GETANYCAST RTM_NEWNEIGHTBL = 64, @@ -783,6 +787,8 @@ enum rtnetlink_groups { #define RTNLGRP_IPV4_MCADDR RTNLGRP_IPV4_MCADDR RTNLGRP_IPV6_MCADDR, #define RTNLGRP_IPV6_MCADDR RTNLGRP_IPV6_MCADDR + RTNLGRP_IPV6_ACADDR, +#define RTNLGRP_IPV6_ACADDR RTNLGRP_IPV6_ACADDR __RTNLGRP_MAX }; #define RTNLGRP_MAX (__RTNLGRP_MAX - 1) -- cgit v1.2.3