bridge: fdb: support match on nexthop ID in flush command

Extend "fdb flush" command to match fdb entries with a specific nexthop ID.

Example:
$ bridge fdb flush dev vx10 nhid 2
This will flush all fdb entries pointing to vx10 with nexthop ID 2.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David Ahern <dsahern@kernel.org>

diff --git a/bridge/fdb.c b/bridge/fdb.c
index 12d19f080289cb555aeeec93ad58252d897c9ce9..22a869222f099a0bcd0093f72c225af61aabb2ef 100644 (file)
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -46,7 +46,8 @@ static void usage(void)
                "       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 ] [ src_vni VNI ]\n"
-               "              [ self ] [ master ] [ [no]permanent | [no]static | [no]dynamic ]\n"
+               "              [ nhid NHID ] [ self ] [ master ]\n"
+               "              [ [no]permanent | [no]static | [no]dynamic ]\n"
                "              [ [no]added_by_user ] [ [no]extern_learn ] [ [no]sticky ]\n"
                "              [ [no]offloaded ]\n");
        exit(-1);
@@ -701,6 +702,7 @@ static int fdb_flush(int argc, char **argv)
        unsigned short ndm_flags = 0;
        unsigned short ndm_state = 0;
        unsigned long src_vni = ~0;
+       __u32 nhid = 0;
        char *endptr;
 
        while (argc > 0) {
@@ -769,6 +771,10 @@ static int fdb_flush(int argc, char **argv)
                        if ((endptr && *endptr) ||
                            (src_vni >> 24) || src_vni == ULONG_MAX)
                                invarg("invalid src VNI\n", *argv);
+               } else if (strcmp(*argv, "nhid") == 0) {
+                       NEXT_ARG();
+                       if (get_u32(&nhid, *argv, 0))
+                               invarg("\"nid\" value is invalid\n", *argv);
                } else if (strcmp(*argv, "help") == 0) {
                        NEXT_ARG();
                } else {
@@ -817,6 +823,8 @@ static int fdb_flush(int argc, char **argv)
                addattr16(&req.n, sizeof(req), NDA_VLAN, vid);
        if (src_vni != ~0)
                addattr32(&req.n, sizeof(req), NDA_SRC_VNI, src_vni);
+       if (nhid > 0)
+               addattr32(&req.n, sizeof(req), NDA_NH_ID, nhid);
        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 b1e96327cf23165787685695a05c6bf181bf7e00..254b2fe91cb9cd426b8dbf556278ba06b0afe831 100644 (file)
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -130,6 +130,8 @@ bridge \- show / manipulate bridge addresses and devices
 .IR VID " ] [ "
 .B src_vni
 .IR VNI " ] [ "
+.B nhid
+.IR NHID " ] ["
 .BR self " ] [ " master " ] [ "
 .BR [no]permanent " | " [no]static " | " [no]dynamic " ] [ "
 .BR [no]added_by_user " ] [ " [no]extern_learn " ] [ "
@@ -900,6 +902,11 @@ 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
+.BI nhid " NHID"
+the ECMP nexthop group for the operation. Match forwarding table entries only
+with the specified NHID. 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