netdev - [PATCH iproute2-next v2 14/19] bridge: vlan: add global mcast_querier

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Date:   Sat, 28 Aug 2021 14:08:00 +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 14/19] bridge: vlan: add global mcast_querier_interval option

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

Add control and dump support for the global mcast_querier_interval
option which controls the interval after which if no other router
queries are seen the bridge will start sending its own queries.
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.
Syntax:
 $ bridge vlan global set dev bridge vid 1 mcast_querier_interval 13000

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

 bridge/vlan.c     | 15 +++++++++++++++
 man/man8/bridge.8 | 12 +++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/bridge/vlan.c b/bridge/vlan.c
index acdbb4a1b562..5494dd15c76e 100644
--- a/bridge/vlan.c
+++ b/bridge/vlan.c
@@ -46,6 +46,7 @@ static void usage(void)
 		"                      [ mcast_last_member_interval LAST_MEMBER_INTERVAL ]\n"
 		"                      [ mcast_startup_query_count STARTUP_QUERY_COUNT ]\n"
 		"                      [ mcast_membership_interval MEMBERSHIP_INTERVAL ]\n"
+		"                      [ mcast_querier_interval QUERIER_INTERVAL ]\n"
 		"       bridge vlan global { show } [ dev DEV ] [ vid VLAN_ID ]\n");
 	exit(-1);
 }
@@ -457,6 +458,14 @@ static int vlan_global_option_set(int argc, char **argv)
 			addattr64(&req.n, 1024,
 				  BRIDGE_VLANDB_GOPTS_MCAST_MEMBERSHIP_INTVL,
 				  val64);
+		} else if (strcmp(*argv, "mcast_querier_interval") == 0) {
+			NEXT_ARG();
+			if (get_u64(&val64, *argv, 0))
+				invarg("invalid mcast_querier_interval",
+				       *argv);
+			addattr64(&req.n, 1024,
+				  BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL,
+				  val64);
 		} else {
 			if (matches(*argv, "help") == 0)
 				NEXT_ARG();
@@ -829,6 +838,12 @@ static void print_vlan_global_opts(struct rtattr *a, int ifindex)
 			     "mcast_membership_interval %llu ",
 			     rta_getattr_u64(vattr));
 	}
+	if (vtb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]) {
+		vattr = vtb[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL];
+		print_lluint(PRINT_ANY, "mcast_querier_interval",
+			     "mcast_querier_interval %llu ",
+			     rta_getattr_u64(vattr));
+	}
 	print_nl();
 	close_json_object();
 }
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index a026ca16f89a..f5c72ec83f93 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -171,7 +171,9 @@ bridge \- show / manipulate bridge addresses and devices
 .B mcast_startup_query_count
 .IR STARTUP_QUERY_COUNT " ] [ "
 .B mcast_membership_interval
-.IR MEMBERSHIP_INTERVAL " ]"
+.IR MEMBERSHIP_INTERVAL " ] [ "
+.B mcast_querier_interval
+.IR QUERIER_INTERVAL " ]"
 
 .ti -8
 .BR "bridge vlan global" " [ " show " ] [ "
@@ -971,6 +973,14 @@ set the number of queries to send during startup phase. Default is 2.
 delay after which the bridge will leave a group,
 if no membership reports for this group are received.
 
+.TP
+.BI mcast_querier_interval " QUERIER_INTERVAL "
+interval between queries sent by other routers. If no queries are seen
+after this delay has passed, the bridge will start to send its own queries
+(as if
+.BI mcast_querier
+was enabled).
+
 .SS bridge vlan global show - list global vlan options.
 
 This command displays the global VLAN options for each VLAN entry.
-- 
2.31.1