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[iproute2-next,v3,1/2] iproute2: expose netlink constants in UAPI

Message ID 20241204140208.2701268-1-yuyanghuang@google.com (mailing list archive)
State New
Delegated to: David Ahern
Headers show
Series [iproute2-next,v3,1/2] iproute2: expose netlink constants in UAPI | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Yuyang Huang Dec. 4, 2024, 2:02 p.m. UTC
This change adds the following multicast related netlink constants to
the UAPI:

* RTNLGRP_IPV4_MCADDR and RTNLGRP_IPV6_MCADDR: Netlink multicast
  groups for IPv4 and IPv6 multicast address changes.
* RTM_NEWMULTICAST and RTM_DELMULTICAST: Netlink message types for
  multicast address additions and deletions.

Exposing these constants in the UAPI enables ip monitor to effectively
monitor and manage multicast group memberships.

Cc: Maciej Żenczykowski <maze@google.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Yuyang Huang <yuyanghuang@google.com>
---

Changelog since v2:
- Align RTM_NEWMULTICAST and RTM_GETMULTICAST enum definitions with
  existing code style.

 include/uapi/linux/rtnetlink.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

Comments

Stephen Hemminger Dec. 4, 2024, 4:28 p.m. UTC | #1
On Wed,  4 Dec 2024 23:02:07 +0900
Yuyang Huang <yuyanghuang@google.com> wrote:

> This change adds the following multicast related netlink constants to
> the UAPI:
> 
> * RTNLGRP_IPV4_MCADDR and RTNLGRP_IPV6_MCADDR: Netlink multicast
>   groups for IPv4 and IPv6 multicast address changes.
> * RTM_NEWMULTICAST and RTM_DELMULTICAST: Netlink message types for
>   multicast address additions and deletions.
> 
> Exposing these constants in the UAPI enables ip monitor to effectively
> monitor and manage multicast group memberships.
> 
> Cc: Maciej Żenczykowski <maze@google.com>
> Cc: Lorenzo Colitti <lorenzo@google.com>
> Signed-off-by: Yuyang Huang <yuyanghuang@google.com>
> ---

This should get automatically picked up when David does header update.
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Patch

diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 4e6c8e14..04be20ee 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -93,7 +93,11 @@  enum {
 	RTM_NEWPREFIX	= 52,
 #define RTM_NEWPREFIX	RTM_NEWPREFIX
 
-	RTM_GETMULTICAST = 58,
+	RTM_NEWMULTICAST = 56,
+#define RTM_NEWMULTICAST RTM_NEWMULTICAST
+	RTM_DELMULTICAST,
+#define RTM_DELMULTICAST RTM_DELMULTICAST
+	RTM_GETMULTICAST,
 #define RTM_GETMULTICAST RTM_GETMULTICAST
 
 	RTM_GETANYCAST	= 62,
@@ -772,6 +776,10 @@  enum rtnetlink_groups {
 #define RTNLGRP_TUNNEL		RTNLGRP_TUNNEL
 	RTNLGRP_STATS,
 #define RTNLGRP_STATS		RTNLGRP_STATS
+	RTNLGRP_IPV4_MCADDR,
+#define RTNLGRP_IPV4_MCADDR	RTNLGRP_IPV4_MCADDR
+	RTNLGRP_IPV6_MCADDR,
+#define RTNLGRP_IPV6_MCADDR    RTNLGRP_IPV6_MCADDR
 	__RTNLGRP_MAX
 };
 #define RTNLGRP_MAX	(__RTNLGRP_MAX - 1)