bridge: fdb: support match on destination port in flush command

Extend "fdb flush" command to match fdb entries with a specific destination
port.

Example:
$ bridge fdb flush dev vx10 port 1111
This will flush all fdb entries pointing to vx10 with destination port
1111.

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 16cd7660f25c6e82750c9eccf8147375a22ea882..f2d882ed6225460438ca51dc9656db8bbb961666 100644 (file)
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -46,7 +46,7 @@ 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"
-               "              [ nhid NHID ] [ vni VNI ] [ self ] [ master ]\n"
+               "              [ nhid NHID ] [ vni VNI ] [ port PORT ] [ self ] [ master ]\n"
                "              [ [no]permanent | [no]static | [no]dynamic ]\n"
                "              [ [no]added_by_user ] [ [no]extern_learn ] [ [no]sticky ]\n"
                "              [ [no]offloaded ]\n");
@@ -703,6 +703,7 @@ static int fdb_flush(int argc, char **argv)
        unsigned short ndm_state = 0;
        unsigned long src_vni = ~0;
        unsigned long vni = ~0;
+       unsigned long port = 0;
        __u32 nhid = 0;
        char *endptr;
 
@@ -782,6 +783,18 @@ static int fdb_flush(int argc, char **argv)
                        if ((endptr && *endptr) ||
                            (vni >> 24) || vni == ULONG_MAX)
                                invarg("invalid VNI\n", *argv);
+               } else if (strcmp(*argv, "port") == 0) {
+                       NEXT_ARG();
+                       port = strtoul(*argv, &endptr, 0);
+                       if (endptr && *endptr) {
+                               struct servent *pse;
+
+                               pse = getservbyname(*argv, "udp");
+                               if (!pse)
+                                       invarg("invalid port\n", *argv);
+                               port = ntohs(pse->s_port);
+                       } else if (port > 0xffff)
+                               invarg("invalid port\n", *argv);
                } else if (strcmp(*argv, "help") == 0) {
                        NEXT_ARG();
                } else {
@@ -834,6 +847,12 @@ static int fdb_flush(int argc, char **argv)
                addattr32(&req.n, sizeof(req), NDA_NH_ID, nhid);
        if (vni != ~0)
                addattr32(&req.n, sizeof(req), NDA_VNI, vni);
+       if (port) {
+               unsigned short dport;
+
+               dport = htons((unsigned short)port);
+               addattr16(&req.n, sizeof(req), NDA_PORT, dport);
+       }
        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 9341c77b3544d7ce219cd3bfdbc2c332daba6b7d..cf23094c8bbbae21118b381468768ad34ff11c4a 100644 (file)
--- a/man/man8/bridge.8
+++ b/man/man8/bridge.8
@@ -134,6 +134,8 @@ bridge \- show / manipulate bridge addresses and devices
 .IR NHID " ] ["
 .B vni
 .IR VNI " ] [ "
+.B port
+.IR PORT " ] ["
 .BR self " ] [ " master " ] [ "
 .BR [no]permanent " | " [no]static " | " [no]dynamic " ] [ "
 .BR [no]added_by_user " ] [ " [no]extern_learn " ] [ "
@@ -915,6 +917,12 @@ the VXLAN 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 port " PORT"
+the UDP destination PORT number for the operation. Match forwarding table
+entries only with the specified PORT. 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