netdev - [PATCH iproute2-next v2 12/19] bridge: vlan: add global mcast_last_member

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Date:   Sat, 28 Aug 2021 14:07:58 +0300
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     netdev@...r.kernel.org
Cc:     roopa@...dia.com, dsahern@...il.com, stephen@...workplumber.org,
        Joachim Wiberg <troglobit@...il.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>
Subject: [PATCH iproute2-next v2 12/19] bridge: vlan: add global mcast_last_member_interval option

From: Nikolay Aleksandrov <nikolay@...dia.com>

Add control and dump support for the global mcast_last_member_interval
option which controls the interval between queries to find remaining
members of a group after a leave message. To be consistent with the same
bridge-wide option the value is reported with USER_HZ granularity and
the same granularity is expected when setting it.
The default is 100 (1 second).
Syntax:
 $ bridge vlan global set dev bridge vid 1 mcast_last_member_interval 200

Signed-off-by: Nikolay Aleksandrov <nikolay@...dia.com>
---
v2: adjust help msg alignment to fit in 100 columns

 bridge/vlan.c     | 16 ++++++++++++++++
 man/man8/bridge.8 |  7 +++++++
 2 files changed, 23 insertions(+)

diff --git a/bridge/vlan.c b/bridge/vlan.c
index 2c6ebedd2d5f..2a3dffdbac44 100644
--- a/bridge/vlan.c
+++ b/bridge/vlan.c
@@ -43,6 +43,7 @@ static void usage(void)
 		"                      [ mcast_igmp_version IGMP_VERSION ]\n"
 		"                      [ mcast_mld_version MLD_VERSION ]\n"
 		"                      [ mcast_last_member_count LAST_MEMBER_COUNT ]\n"
+		"                      [ mcast_last_member_interval LAST_MEMBER_INTERVAL ]\n"
 		"                      [ mcast_startup_query_count STARTUP_QUERY_COUNT ]\n"
 		"       bridge vlan global { show } [ dev DEV ] [ vid VLAN_ID ]\n");
 	exit(-1);
@@ -361,6 +362,7 @@ static int vlan_global_option_set(int argc, char **argv)
 	short vid_end = -1;
 	char *d = NULL;
 	short vid = -1;
+	__u64 val64;
 	__u32 val32;
 	__u8 val8;
 
@@ -438,6 +440,14 @@ static int vlan_global_option_set(int argc, char **argv)
 			addattr32(&req.n, 1024,
 				  BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT,
 				  val32);
+		} else if (strcmp(*argv, "mcast_last_member_interval") == 0) {
+			NEXT_ARG();
+			if (get_u64(&val64, *argv, 0))
+				invarg("invalid mcast_last_member_interval",
+				       *argv);
+			addattr64(&req.n, 1024,
+				  BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL,
+				  val64);
 		} else {
 			if (matches(*argv, "help") == 0)
 				NEXT_ARG();
@@ -792,6 +802,12 @@ static void print_vlan_global_opts(struct rtattr *a, int ifindex)
 			   "mcast_last_member_count %u ",
 			   rta_getattr_u32(vattr));
 	}
+	if (vtb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL]) {
+		vattr = vtb[BRIDGE_VLANDB_GOPTS_MCAST_LAST_MEMBER_INTVL];
+		print_lluint(PRINT_ANY, "mcast_last_member_interval",
+			     "mcast_last_member_interval %llu ",
+			     rta_getattr_u64(vattr));
+	}
 	if (vtb[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT]) {
 		vattr = vtb[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_CNT];
 		print_uint(PRINT_ANY, "mcast_startup_query_count",
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index 7741382321cb..0d973a9db0e0 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -166,6 +166,8 @@ bridge \- show / manipulate bridge addresses and devices
 .IR MLD_VERSION " ] [ "
 .B mcast_last_member_count
 .IR LAST_MEMBER_COUNT " ] [ "
+.B mcast_last_member_interval
+.IR LAST_MEMBER_INTERVAL " ] [ "
 .B mcast_startup_query_count
 .IR STARTUP_QUERY_COUNT " ]"
 
@@ -953,6 +955,11 @@ set multicast last member count, ie the number of queries the bridge
 will send before stopping forwarding a multicast group after a "leave"
 message has been received. Default is 2.
 
+.TP
+.BI mcast_last_member_interval " LAST_MEMBER_INTERVAL "
+interval between queries to find remaining members of a group,
+after a "leave" message is received.
+
 .TP
 .BI mcast_startup_query_count " STARTUP_QUERY_COUNT "
 set the number of queries to send during startup phase. Default is 2.
-- 
2.31.1