On Sat, Apr 09, 2022 at 01:58:56PM +0300, Nikolay Aleksandrov wrote: > Add support for fdb flush filtering based on destination ifindex. The > ifindex must either match a port's device ifindex or the bridge's. > > Signed-off-by: Nikolay Aleksandrov <[email protected]> > --- > include/uapi/linux/if_bridge.h | 1 + > net/bridge/br_fdb.c | 7 +++++++ > 2 files changed, 8 insertions(+) > > diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h > index 4638d7e39f2a..67ee12586844 100644 > --- a/include/uapi/linux/if_bridge.h > +++ b/include/uapi/linux/if_bridge.h > @@ -819,6 +819,7 @@ enum { > FDB_FLUSH_NDM_STATE_MASK, > FDB_FLUSH_NDM_FLAGS, > FDB_FLUSH_NDM_FLAGS_MASK, > + FDB_FLUSH_PORT_IFINDEX, > __FDB_FLUSH_MAX > }; > #define FDB_FLUSH_MAX (__FDB_FLUSH_MAX - 1) > diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c > index 340a2ace1d5e..53208adf7474 100644 > --- a/net/bridge/br_fdb.c > +++ b/net/bridge/br_fdb.c > @@ -628,6 +628,7 @@ static const struct nla_policy > br_fdb_flush_policy[FDB_FLUSH_MAX + 1] = { > [FDB_FLUSH_NDM_FLAGS] = { .type = NLA_U16 }, > [FDB_FLUSH_NDM_STATE_MASK] = { .type = NLA_U16 }, > [FDB_FLUSH_NDM_FLAGS_MASK] = { .type = NLA_U16 }, > + [FDB_FLUSH_PORT_IFINDEX] = { .type = NLA_S32 }, > }; > > int br_fdb_flush_nlattr(struct net_bridge *br, struct nlattr *fdb_flush_attr, > @@ -664,6 +665,12 @@ int br_fdb_flush_nlattr(struct net_bridge *br, struct > nlattr *fdb_flush_attr, > ndm_flags_mask = > nla_get_u16(fdb_flush_tb[FDB_FLUSH_NDM_FLAGS_MASK]); > desc.flags_mask |= __ndm_flags_to_fdb_flags(ndm_flags_mask); > } > + if (fdb_flush_tb[FDB_FLUSH_PORT_IFINDEX]) { > + int port_ifidx; > + > + port_ifidx = nla_get_u32(fdb_flush_tb[FDB_FLUSH_PORT_IFINDEX]); > + desc.port_ifindex = port_ifidx;
Commit message says "ifindex must either match a port's device ifindex or the bridge's", but there is no validation. I realize such an operation won't flush anything, but it's cleaner to just reject it here. > + } > > br_debug(br, "flushing port ifindex: %d vlan id: %u flags: 0x%lx flags > mask: 0x%lx\n", > desc.port_ifindex, desc.vlan_id, desc.flags, desc.flags_mask); > -- > 2.35.1 >
