[Bridge] [PATCH net-next 07/13] bridge: add MDB get uAPI attributes

[Ido Schimmel <idosch@nvidia.com>]

Add MDB get attributes that correspond to the MDB set attributes used in
RTM_NEWMDB messages. Specifically, add 'MDBA_GET_ENTRY' which will hold
a 'struct br_mdb_entry' and 'MDBA_GET_ENTRY_ATTRS' which will hold
'MDBE_ATTR_*' attributes that are used as indexes (source IP and source
VNI).

An example request will look as follows:

[ struct nlmsghdr ]
[ struct br_port_msg ]
[ MDBA_GET_ENTRY ]
	struct br_mdb_entry
[ MDBA_GET_ENTRY_ATTRS ]
	[ MDBE_ATTR_SOURCE ]
		struct in_addr / struct in6_addr
	[ MDBE_ATTR_SRC_VNI ]
		u32

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 include/uapi/linux/if_bridge.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index f95326fce6bb..7e1bf080b414 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -723,6 +723,14 @@ enum {
 };
 #define MDBA_SET_ENTRY_MAX (__MDBA_SET_ENTRY_MAX - 1)
 
+enum {
+	MDBA_GET_ENTRY_UNSPEC,
+	MDBA_GET_ENTRY,
+	MDBA_GET_ENTRY_ATTRS,
+	__MDBA_GET_ENTRY_MAX,
+};
+#define MDBA_GET_ENTRY_MAX (__MDBA_GET_ENTRY_MAX - 1)
+
 /* [MDBA_SET_ENTRY_ATTRS] = {
  *    [MDBE_ATTR_xxx]
  *    ...
-- 
2.40.1