diff options
| author | Yuyang Huang <sigefriedhyy@gmail.com> | 2026-06-30 20:02:05 +0900 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2026-07-03 08:50:43 +0200 |
| commit | 7cb8198761e627ff3a3b4770c8f147e75c4e649d (patch) | |
| tree | 4063785da6cad89f956937db40aff0debbd3545b /include | |
| parent | 2ed8d5c72488bca9666fefa942ed2dc07cc0c56a (diff) | |
| download | linux-next-7cb8198761e627ff3a3b4770c8f147e75c4e649d.tar.gz linux-next-7cb8198761e627ff3a3b4770c8f147e75c4e649d.zip | |
net: ipv4: report multicast group user count
RTM_GETMULTICAST has been part of the rtnetlink ABI for a long time
and already reports IPv4 multicast group membership through
IFA_MULTICAST and IFA_CACHEINFO. It does not report how many consumers
hold each membership, so userspace still has to parse /proc/net/igmp to
get the Users column.
Add IFA_MC_USERS as a u32 attribute carrying ip_mc_list::users in
RTM_GETMULTICAST replies and entry-lifecycle notifications.
This gives iproute2 enough information to migrate the IPv4 part of
"ip maddr show" from procfs parsing to rtnetlink.
Signed-off-by: Yuyang Huang <sigefriedhyy@gmail.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260630110207.37841-2-sigefriedhyy@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/if_addr.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h index aa7958b4e41d..7fb630b7fe31 100644 --- a/include/uapi/linux/if_addr.h +++ b/include/uapi/linux/if_addr.h @@ -36,6 +36,7 @@ enum { IFA_RT_PRIORITY, /* u32, priority/metric for prefix route */ IFA_TARGET_NETNSID, IFA_PROTO, /* u8, address protocol */ + IFA_MC_USERS, /* u32, multicast group users */ __IFA_MAX, }; |