netdev - [PATCH iproute2-next 2/8] bridge: fdb: support match on source VNI in flush command

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Message-ID: <20231017070227.3560105-3-amcohen@nvidia.com>
Date: Tue, 17 Oct 2023 10:02:21 +0300
From: Amit Cohen <amcohen@...dia.com>
To: <netdev@...r.kernel.org>
CC: <dsahern@...il.com>, <stephen@...workplumber.org>, <razor@...ckwall.org>,
	<mlxsw@...dia.com>, <roopa@...dia.com>, Amit Cohen <amcohen@...dia.com>
Subject: [PATCH iproute2-next 2/8] bridge: fdb: support match on source VNI in flush command

Extend "fdb flush" command to match fdb entries with a specific source VNI.

Example:
$ bridge fdb flush dev vx10 src_vni 1000
This will flush all fdb entries pointing to vx10 with source VNI 1000.

Signed-off-by: Amit Cohen <amcohen@...dia.com>
---
 bridge/fdb.c      | 12 +++++++++++-
 man/man8/bridge.8 |  8 ++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/bridge/fdb.c b/bridge/fdb.c
index e01e14f1..12d19f08 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -45,7 +45,7 @@ static void usage(void)
 		"              [ state STATE ] [ dynamic ] ]\n"
 		"       bridge fdb get [ to ] LLADDR [ br BRDEV ] { brport | dev } DEV\n"
 		"              [ vlan VID ] [ vni VNI ] [ self ] [ master ] [ dynamic ]\n"
-		"       bridge fdb flush dev DEV [ brport DEV ] [ vlan VID ]\n"
+		"       bridge fdb flush dev DEV [ brport DEV ] [ vlan VID ] [ src_vni VNI ]\n"
 		"              [ self ] [ master ] [ [no]permanent | [no]static | [no]dynamic ]\n"
 		"              [ [no]added_by_user ] [ [no]extern_learn ] [ [no]sticky ]\n"
 		"              [ [no]offloaded ]\n");
@@ -700,6 +700,8 @@ static int fdb_flush(int argc, char **argv)
 	char *d = NULL, *brport = NULL;
 	unsigned short ndm_flags = 0;
 	unsigned short ndm_state = 0;
+	unsigned long src_vni = ~0;
+	char *endptr;
 
 	while (argc > 0) {
 		if (strcmp(*argv, "dev") == 0) {
@@ -761,6 +763,12 @@ static int fdb_flush(int argc, char **argv)
 				duparg2("vlan", *argv);
 			NEXT_ARG();
 			vid = atoi(*argv);
+		} else if (strcmp(*argv, "src_vni") == 0) {
+			NEXT_ARG();
+			src_vni = strtoul(*argv, &endptr, 0);
+			if ((endptr && *endptr) ||
+			    (src_vni >> 24) || src_vni == ULONG_MAX)
+				invarg("invalid src VNI\n", *argv);
 		} else if (strcmp(*argv, "help") == 0) {
 			NEXT_ARG();
 		} else {
@@ -807,6 +815,8 @@ static int fdb_flush(int argc, char **argv)
 		addattr32(&req.n, sizeof(req), NDA_IFINDEX, brport_ifidx);
 	if (vid > -1)
 		addattr16(&req.n, sizeof(req), NDA_VLAN, vid);
+	if (src_vni != ~0)
+		addattr32(&req.n, sizeof(req), NDA_SRC_VNI, src_vni);
 	if (ndm_flags_mask)
 		addattr8(&req.n, sizeof(req), NDA_NDM_FLAGS_MASK,
 			 ndm_flags_mask);
diff --git a/man/man8/bridge.8 b/man/man8/bridge.8
index c52c9331..b1e96327 100644
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -128,6 +128,8 @@ bridge \- show / manipulate bridge addresses and devices
 .IR DEV " ] [ "
 .B vlan
 .IR VID " ] [ "
+.B src_vni
+.IR VNI " ] [ "
 .BR self " ] [ " master " ] [ "
 .BR [no]permanent " | " [no]static " | " [no]dynamic " ] [ "
 .BR [no]added_by_user " ] [ " [no]extern_learn " ] [ "
@@ -892,6 +894,12 @@ specified by this option will override the one specified by dev above.
 the target VLAN ID for the operation. Match forwarding table entries only with the
 specified VLAN ID.
 
+.TP
+.BI src_vni " VNI"
+the src VNI Network Identifier (or VXLAN Segment ID) for the operation. Match
+forwarding table entries only with the specified VNI. Valid if the referenced
+device is a VXLAN type device.
+
 .TP
 .B self
 the operation is fulfilled directly by the driver for the specified network
-- 
2.41.0