diff options
author | Nikolay Aleksandrov <razor@blackwall.org> | 2022-04-13 13:52:02 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2022-04-13 12:46:26 +0100 |
commit | 0dbe886a4d8da1852b1ece67808d0bead74b1244 (patch) | |
tree | 904a9d53ade1038b0d44944dec7d4f692b5484bd /net | |
parent | 564445fb4f0f7f3764320966a3d1e7c2711fd256 (diff) | |
download | linux-0dbe886a4d8da1852b1ece67808d0bead74b1244.tar.bz2 |
net: bridge: fdb: add support for flush filtering based on ifindex and vlan
Add support for fdb flush filtering based on destination ifindex and
vlan id. The ifindex must either match a port's device ifindex or the
bridge's. The vlan support is trivial since it's already validated by
rtnl_fdb_del, we just need to fill it in.
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/bridge/br_fdb.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 74d759d09f94..1a3d583fbc8e 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -622,12 +622,44 @@ static unsigned long __ndm_flags_to_fdb_flags(u8 ndm_flags) return flags; } +static int __fdb_flush_validate_ifindex(const struct net_bridge *br, + int ifindex, + struct netlink_ext_ack *extack) +{ + const struct net_device *dev; + + dev = __dev_get_by_index(dev_net(br->dev), ifindex); + if (!dev) { + NL_SET_ERR_MSG_MOD(extack, "Unknown flush device ifindex"); + return -ENODEV; + } + if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { + NL_SET_ERR_MSG_MOD(extack, "Flush device is not a bridge or bridge port"); + return -EINVAL; + } + if (netif_is_bridge_master(dev) && dev != br->dev) { + NL_SET_ERR_MSG_MOD(extack, + "Flush bridge device does not match target bridge device"); + return -EINVAL; + } + if (netif_is_bridge_port(dev)) { + struct net_bridge_port *p = br_port_get_rtnl(dev); + + if (p->br != br) { + NL_SET_ERR_MSG_MOD(extack, "Port belongs to a different bridge device"); + return -EINVAL; + } + } + + return 0; +} + int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, u16 vid, struct netlink_ext_ack *extack) { u8 ndm_flags = ndm->ndm_flags & ~FDB_FLUSH_IGNORED_NDM_FLAGS; - struct net_bridge_fdb_flush_desc desc = {}; + struct net_bridge_fdb_flush_desc desc = { .vlan_id = vid }; struct net_bridge_port *p = NULL; struct net_bridge *br; @@ -663,6 +695,17 @@ int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], desc.flags_mask |= __ndm_flags_to_fdb_flags(ndm_flags_mask); } + if (tb[NDA_IFINDEX]) { + int err, ifidx = nla_get_s32(tb[NDA_IFINDEX]); + + err = __fdb_flush_validate_ifindex(br, ifidx, extack); + if (err) + return err; + desc.port_ifindex = ifidx; + } else if (p) { + /* flush was invoked with port device and NTF_MASTER */ + desc.port_ifindex = p->dev->ifindex; + } 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); |