On Sat, Apr 09, 2022 at 01:58:54PM +0300, Nikolay Aleksandrov wrote: > Add a new fdb flush call which parses the embedded attributes in > BRIDGE_FLUSH_FDB and fills in the fdb flush descriptor to delete only > matching entries. Currently it's a complete flush, support for more > fine-grained filtering will be added in the following patches. > > Signed-off-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx> > --- > include/uapi/linux/if_bridge.h | 8 ++++++++ > net/bridge/br_fdb.c | 24 ++++++++++++++++++++++++ > net/bridge/br_netlink.c | 8 ++++++++ > net/bridge/br_private.h | 2 ++ > 4 files changed, 42 insertions(+) > > diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h > index 221a4256808f..2f3799cf14b2 100644 > --- a/include/uapi/linux/if_bridge.h > +++ b/include/uapi/linux/if_bridge.h > @@ -807,7 +807,15 @@ enum { > /* embedded in IFLA_BRIDGE_FLUSH */ > enum { > BRIDGE_FLUSH_UNSPEC, > + BRIDGE_FLUSH_FDB, > __BRIDGE_FLUSH_MAX > }; > #define BRIDGE_FLUSH_MAX (__BRIDGE_FLUSH_MAX - 1) > + > +/* embedded in BRIDGE_FLUSH_FDB */ > +enum { > + FDB_FLUSH_UNSPEC, > + __FDB_FLUSH_MAX > +}; > +#define FDB_FLUSH_MAX (__FDB_FLUSH_MAX - 1) > #endif /* _UAPI_LINUX_IF_BRIDGE_H */ > diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c > index 4b0bf88c4121..62f694a739e1 100644 > --- a/net/bridge/br_fdb.c > +++ b/net/bridge/br_fdb.c > @@ -594,6 +594,30 @@ void br_fdb_flush(struct net_bridge *br, > rcu_read_unlock(); > } > > +static const struct nla_policy br_fdb_flush_policy[FDB_FLUSH_MAX + 1] = { > + [FDB_FLUSH_UNSPEC] = { .type = NLA_REJECT }, > +}; > + > +int br_fdb_flush_nlattr(struct net_bridge *br, struct nlattr *fdb_flush_attr, > + struct netlink_ext_ack *extack) > +{ > + struct nlattr *fdb_flush_tb[FDB_FLUSH_MAX + 1]; > + struct net_bridge_fdb_flush_desc desc = {}; > + int err; > + > + err = nla_parse_nested(fdb_flush_tb, FDB_FLUSH_MAX, fdb_flush_attr, > + br_fdb_flush_policy, extack); > + if (err) > + return err; > + > + 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); > + > + br_fdb_flush(br, &desc); > + > + return 0; > +} > + > /* Flush all entries referring to a specific port. > * if do_all is set also flush static entries > * if vid is set delete all entries that match the vlan_id > diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c > index 6e6dce6880c9..bd2c91e5723d 100644 > --- a/net/bridge/br_netlink.c > +++ b/net/bridge/br_netlink.c > @@ -781,6 +781,7 @@ int br_process_vlan_info(struct net_bridge *br, > > static const struct nla_policy br_flush_policy[BRIDGE_FLUSH_MAX + 1] = { > [BRIDGE_FLUSH_UNSPEC] = { .type = NLA_REJECT }, > + [BRIDGE_FLUSH_FDB] = { .type = NLA_NESTED }, In a previous submission [1] Jakub suggested using NLA_POLICY_NESTED() [1] https://lore.kernel.org/netdev/20220224221447.6c7fa95d@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ > }; > > static int br_flush(struct net_bridge *br, int cmd, > @@ -804,6 +805,13 @@ static int br_flush(struct net_bridge *br, int cmd, > if (err) > return err; > > + if (flush_tb[BRIDGE_FLUSH_FDB]) { > + err = br_fdb_flush_nlattr(br, flush_tb[BRIDGE_FLUSH_FDB], > + extack); > + if (err) > + return err; > + } > + > return 0; > } > > diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h > index e6930e9ee69d..c7ea531d30ef 100644 > --- a/net/bridge/br_private.h > +++ b/net/bridge/br_private.h > @@ -768,6 +768,8 @@ int br_fdb_hash_init(struct net_bridge *br); > void br_fdb_hash_fini(struct net_bridge *br); > void br_fdb_flush(struct net_bridge *br, > const struct net_bridge_fdb_flush_desc *desc); > +int br_fdb_flush_nlattr(struct net_bridge *br, struct nlattr *fdb_flush_attr, > + struct netlink_ext_ack *extack); > void br_fdb_find_delete_local(struct net_bridge *br, > const struct net_bridge_port *p, > const unsigned char *addr, u16 vid); > -- > 2.35.1 >