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| author | Victor Nogueira <victor@mojatatu.com> | 2023-12-08 22:28:42 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-12-12 05:52:56 +0300 |
| commit | 8439109b76a3c405808383bf9dd532fc4b9c2dbd (patch) | |
| tree | aa386d0d776956bfbb5515c958b25980cb3544ec | |
| parent | c5e2a973448d958feb7881e4d875eac59fdeff3d (diff) | |
| download | linux-8439109b76a3c405808383bf9dd532fc4b9c2dbd.tar.xz | |
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 <jiri@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Link: https://lore.kernel.org/r/20231208192847.714940-3-pctammela@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/linux/rtnetlink.h | 15 |
1 files changed, 15 insertions, 0 deletions
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 */ |