On 6/30/26 1:02 PM, Yuyang Huang wrote: > RTM_GETMULTICAST reports IPv4 and IPv6 multicast group membership, but > does not include the per-group user count. Userspace therefore still has > to parse /proc/net/igmp and /proc/net/igmp6 to obtain the Users column. > In particular, this prevents iproute2 from moving "ip maddr show" > entirely from procfs to rtnetlink. > > Add IFA_MC_USERS to carry the user count in RTM_GETMULTICAST dumps and > RTM_NEWMULTICAST / RTM_DELMULTICAST notifications for both address > families. Update the rt-addr YNL specification and extend the rtnetlink > selftest to verify that two joins increase the reported count by two.
Will you take care of implementing the iproute2 bits, too? Thanks, Paolo
