bridge: Fix inability to add non-vlan fdb entry

Bridge's default_pvid adds a vid by default, by which we cannot add a
non-vlan fdb entry by default, because br_fdb_add() adds fdb entries for
all vlans instead of a non-vlan one when any vlan is configured.

 # ip link add br0 type bridge
 # ip link set eth0 master br0
 # bridge fdb add 12:34:56:78:90:ab dev eth0 master temp
 # bridge fdb show brport eth0 | grep 12:34:56:78:90:ab
 12:34:56:78:90:ab dev eth0 vlan 1 static

We expect a non-vlan fdb entry as well as vlan 1:
 12:34:56:78:90:ab dev eth0 static

To fix this, we need to insert a non-vlan fdb entry if vlan is not
specified, even when any vlan is configured.

Fixes: 5be5a2df40f0 ("bridge: Add filtering support for default_pvid")
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 7 deletions

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index cc36e59db7d7..c041f99f5a78 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -840,10 +840,9 @@ int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                 /* VID was specified, so use it. */
                 err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
         } else {
-                if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) {
-                        err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
+                err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
+                if (err || !pv)
                         goto out;
-                }
 
                 /* We have vlans configured on this port and user didn't
                  * specify a VLAN.  To be nice, add/update entry for every
@@ -911,16 +910,15 @@ int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 
                 err = __br_fdb_delete(p, addr, vid);
         } else {
-                if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID)) {
-                        err = __br_fdb_delete(p, addr, 0);
+                err = -ENOENT;
+                err &= __br_fdb_delete(p, addr, 0);
+                if (!pv)
                         goto out;
-                }
 
                 /* We have vlans configured on this port and user didn't
                  * specify a VLAN.  To be nice, add/update entry for every
                  * vlan on this port.
                  */
-                err = -ENOENT;
                 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
                         err &= __br_fdb_delete(p, addr, vid);
                 }