net: bridge: vlan: add support for mcast last member count global option

Add support to change and retrieve global vlan multicast last member
count option.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 5188b9f..d7a1500 100644 (file)
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -551,6 +551,7 @@ enum {
        BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING,
        BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION,
        BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION,
+       BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT,
        __BRIDGE_VLANDB_GOPTS_MAX
 };
 #define BRIDGE_VLANDB_GOPTS_MAX (__BRIDGE_VLANDB_GOPTS_MAX - 1)

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index b0b1e1a..53627a8 100644 (file)
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1174,6 +1174,8 @@ br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
 {
        return brmctx1->multicast_igmp_version ==
               brmctx2->multicast_igmp_version &&
+              brmctx1->multicast_last_member_count ==
+              brmctx2->multicast_last_member_count &&
 #if IS_ENABLED(CONFIG_IPV6)
               brmctx1->multicast_mld_version ==
               brmctx2->multicast_mld_version &&

diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c
index ac32fb4..75733b5 100644 (file)
--- a/net/bridge/br_vlan_options.c
+++ b/net/bridge/br_vlan_options.c
@@ -289,7 +289,9 @@ bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
        if (nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING,
                       !!(v_opts->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)) ||
            nla_put_u8(skb, BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION,
-                      v_opts->br_mcast_ctx.multicast_igmp_version))
+                      v_opts->br_mcast_ctx.multicast_igmp_version) ||
+           nla_put_u32(skb, BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT,
+                       v_opts->br_mcast_ctx.multicast_last_member_count))
                goto out_err;
 
 #if IS_ENABLED(CONFIG_IPV6)
@@ -317,6 +319,7 @@ static size_t rtnl_vlan_global_opts_nlmsg_size(void)
                + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING */
                + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION */
                + nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION */
+               + nla_total_size(sizeof(u32)) /* BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT */
 #endif
                + nla_total_size(sizeof(u16)); /* BRIDGE_VLANDB_GOPTS_RANGE */
 }
@@ -391,6 +394,13 @@ static int br_vlan_process_global_one_opts(const struct net_bridge *br,
                        return err;
                *changed = true;
        }
+       if (tb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT]) {
+               u32 cnt;
+
+               cnt = nla_get_u32(tb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT]);
+               v->br_mcast_ctx.multicast_last_member_count = cnt;
+               *changed = true;
+       }
 #if IS_ENABLED(CONFIG_IPV6)
        if (tb[BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION]) {
                u8 ver;
@@ -413,6 +423,7 @@ static const struct nla_policy br_vlan_db_gpol[BRIDGE_VLANDB_GOPTS_MAX + 1] = {
        [BRIDGE_VLANDB_GOPTS_MCAST_SNOOPING]    = { .type = NLA_U8 },
        [BRIDGE_VLANDB_GOPTS_MCAST_MLD_VERSION] = { .type = NLA_U8 },
        [BRIDGE_VLANDB_GOPTS_MCAST_IGMP_VERSION]        = { .type = NLA_U8 },
+       [BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_CNT]     = { .type = NLA_U32 },
 };
 
 int br_vlan_rtm_process_global_options(struct net_device *dev,