diff mbox series

[net-next,v2,2/5] rtnl: add helper to check if a notification is needed

Message ID 20231204203907.413435-3-pctammela@mojatatu.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net/sched: conditional notification of events for cls and act | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 4579 this patch: 4579
netdev/cc_maintainers warning 1 maintainers not CCed: martin@strongswan.org
netdev/build_clang success Errors and warnings before: 1333 this patch: 1333
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4834 this patch: 4834
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 19 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Pedro Tammela Dec. 4, 2023, 8:39 p.m. UTC 
From: Victor Nogueira <victor@mojatatu.com>

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.

Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
---
 include/linux/rtnetlink.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Comments

Jiri Pirko Dec. 5, 2023, 11:50 a.m. UTC | #1 
Mon, Dec 04, 2023 at 09:39:04PM CET, pctammela@mojatatu.com wrote:
>From: Victor Nogueira <victor@mojatatu.com>
>
>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.
>
>Signed-off-by: Victor Nogueira <victor@mojatatu.com>
>Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
diff mbox series

Patch

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 */