To be able to use the upcoming SWITCHDEV_ATTR_ID_BRIDGE_MC_ACTIVE as a potential replacement for SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED also check and toggle the active state if multicast snooping is enabled or disabled. So that MC_ACTIVE not only checks the querier state, but also if multicast snooping is enabled in general.
No functional change for the fast/data path yet. Signed-off-by: Linus Lüssing <[email protected]> --- include/uapi/linux/if_link.h | 6 ++++-- net/bridge/br_multicast.c | 15 +++++++++++++-- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 66c59953d301..d963be8679b5 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -748,12 +748,14 @@ enum in6_addr_gen_mode { * @IFLA_BR_MCAST_ACTIVE_V4 * Bridge IPv4 mcast active state, read only. * - * 1 if an IGMP querier is present, 0 otherwise. + * 1 if *IFLA_BR_MCAST_SNOOPING* is enabled and an IGMP querier is present, + * 0 otherwise. * * @IFLA_BR_MCAST_ACTIVE_V6 * Bridge IPv6 mcast active state, read only. * - * 1 if an MLD querier is present, 0 otherwise. + * 1 if *IFLA_BR_MCAST_SNOOPING* is enabled and an MLD querier is present, + * 0 otherwise. */ enum { IFLA_BR_UNSPEC, diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 6c4b239c70eb..7887ed9af53a 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1122,6 +1122,7 @@ static void br_multicast_notify_active(struct net_bridge_mcast *brmctx, * * The multicast active state is set, per protocol family, if: * + * - multicast snooping is enabled * - an IGMP/MLD querier is present * - for own IPv6 MLD querier: an IPv6 link-local address is configured on the bridge * @@ -1137,6 +1138,9 @@ static void br_multicast_update_active(struct net_bridge_mcast *brmctx) lockdep_assert_held_once(&brmctx->br->multicast_lock); + if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) + force_inactive = true; + br_ip4_multicast_update_active(brmctx, force_inactive); br_ip6_multicast_update_active(brmctx, force_inactive); @@ -1351,6 +1355,12 @@ static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx, return NULL; } +static void br_multicast_toggle_enabled(struct net_bridge *br, bool on) +{ + br_opt_toggle(br, BROPT_MULTICAST_ENABLED, on); + br_multicast_update_active(&br->multicast_ctx); +} + struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, struct br_ip *group) { @@ -1364,7 +1374,7 @@ struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { trace_br_mdb_full(br->dev, group); br_mc_disabled_update(br->dev, false, NULL); - br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); + br_multicast_toggle_enabled(br, false); return ERR_PTR(-E2BIG); } @@ -4827,7 +4837,8 @@ int br_multicast_toggle(struct net_bridge *br, unsigned long val, if (err) goto unlock; - br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); + br_multicast_toggle_enabled(br, !!val); + if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { change_snoopers = true; br_multicast_del_grps(br); -- 2.51.0
