On 11/04/2022 11:57, Ido Schimmel wrote:
> 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 <razor@xxxxxxxxxxxxx>
>> ---
>> 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.
>
Sure, I can add a check for the device when specified.
>> + }
>>
>> 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
>>
