[PATCH net-next 0/9] Add MDB bulk deletion support

[Ido Schimmel <idosch@nvidia.com>]

This patchset adds MDB bulk deletion support, allowing user space to
request the deletion of matching entries instead of dumping the entire
MDB and issuing a separate deletion request for each matching entry.
Support is added in both the bridge and VXLAN drivers in a similar
fashion to the existing FDB bulk deletion support.

The parameters according to which bulk deletion can be performed are
similar to the FDB ones, namely: Destination port, VLAN ID, state (e.g.,
"permanent"), routing protocol, source / destination VNI, destination IP
and UDP port. Flushing based on flags (e.g., "offload", "fast_leave",
"added_by_star_ex", "blocked") is not currently supported, but can be
added in the future, if a use case arises.

Patch #1 adds a new uAPI attribute to allow specifying the state mask
according to which bulk deletion will be performed, if any.

Patch #2 adds a new policy according to which bulk deletion requests
(with 'NLM_F_BULK' flag set) will be parsed.

Patches #3-#4 add a new NDO for MDB bulk deletion and invoke it from the
rtnetlink code when a bulk deletion request is made.

Patches #5-#6 implement the MDB bulk deletion NDO in the bridge and
VXLAN drivers, respectively.

Patch #7 allows user space to issue MDB bulk deletion requests by no
longer rejecting the 'NLM_F_BULK' flag when it is set in 'RTM_DELMDB'
requests.

Patches #8-#9 add selftests for both drivers, for both good and bad
flows.

iproute2 changes can be found here [1].

https://github.com/idosch/iproute2/tree/submit/mdb_flush_v1

Ido Schimmel (9):
  bridge: add MDB state mask uAPI attribute
  rtnetlink: bridge: Use a different policy for MDB bulk delete
  net: Add MDB bulk deletion device operation
  rtnetlink: bridge: Invoke MDB bulk deletion when needed
  bridge: mdb: Add MDB bulk deletion support
  vxlan: mdb: Add MDB bulk deletion support
  rtnetlink: bridge: Enable MDB bulk deletion
  selftests: bridge_mdb: Add MDB bulk deletion test
  selftests: vxlan_mdb: Add MDB bulk deletion test

 drivers/net/vxlan/vxlan_core.c                |   1 +
 drivers/net/vxlan/vxlan_mdb.c                 | 174 ++++++++++++---
 drivers/net/vxlan/vxlan_private.h             |   2 +
 include/linux/netdevice.h                     |   6 +
 include/uapi/linux/if_bridge.h                |   1 +
 net/bridge/br_device.c                        |   1 +
 net/bridge/br_mdb.c                           | 133 ++++++++++++
 net/bridge/br_private.h                       |   8 +
 net/core/rtnetlink.c                          |  62 +++++-
 .../selftests/net/forwarding/bridge_mdb.sh    | 191 ++++++++++++++++-
 tools/testing/selftests/net/test_vxlan_mdb.sh | 201 +++++++++++++++++-
 11 files changed, 749 insertions(+), 31 deletions(-)

-- 
2.40.1