From 8439109b76a3c405808383bf9dd532fc4b9c2dbd Mon Sep 17 00:00:00 2001 From: Victor Nogueira Date: Fri, 8 Dec 2023 16:28:42 -0300 Subject: rtnl: add helper to check if a notification is needed Building on the rtnl_has_listeners helper, add the rtnl_notify_needed helper to check if we can bail out early in the notification routines. Reviewed-by: Jiri Pirko Reviewed-by: Simon Horman Signed-off-by: Victor Nogueira Signed-off-by: Pedro Tammela Link: https://lore.kernel.org/r/20231208192847.714940-3-pctammela@mojatatu.com Signed-off-by: Jakub Kicinski --- include/linux/rtnetlink.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux') diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index a7d757e96c55..0cbbbded0331 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -137,4 +137,19 @@ static inline int rtnl_has_listeners(const struct net *net, u32 group) return netlink_has_listeners(rtnl, group); } +/** + * rtnl_notify_needed - check if notification is needed + * @net: Pointer to the net namespace + * @nlflags: netlink ingress message flags + * @group: rtnl group + * + * Based on the ingress message flags and rtnl group, returns true + * if a notification is needed, false otherwise. + */ +static inline bool +rtnl_notify_needed(const struct net *net, u16 nlflags, u32 group) +{ + return (nlflags & NLM_F_ECHO) || rtnl_has_listeners(net, group); +} + #endif /* __LINUX_RTNETLINK_H */ -- cgit v1.2.3