[net-next,00/13] Add MDB get support

Message

Ido Schimmel Oct. 16, 2023, 1:12 p.m. UTC

This patchset adds MDB get support, allowing user space to request a
single MDB entry to be retrieved instead of dumping the entire MDB.
Support is added in both the bridge and VXLAN drivers.

Patches #1-#6 are small preparations in both drivers.

Patches #7-#8 add the required uAPI attributes for the new functionality
and the MDB get net device operation (NDO), respectively.

Patches #9-#10 implement the MDB get NDO in both drivers.

Patch #11 registers a handler for RTM_GETMDB messages in rtnetlink core.
The handler derives the net device from the ifindex specified in the
ancillary header and invokes its MDB get NDO.

Patches #12-#13 add selftests by converting tests that use MDB dump with
grep to the new MDB get functionality.

iproute2 changes can be found here [1].

[1] https://github.com/idosch/iproute2/tree/submit/mdb_get_v1

Ido Schimmel (13):
  bridge: mcast: Dump MDB entries even when snooping is disabled
  bridge: mcast: Account for missing attributes
  bridge: mcast: Factor out a helper for PG entry size calculation
  bridge: mcast: Rename MDB entry get function
  vxlan: mdb: Adjust function arguments
  vxlan: mdb: Factor out a helper for remote entry size calculation
  bridge: add MDB get uAPI attributes
  net: Add MDB get device operation
  bridge: mcast: Add MDB get support
  vxlan: mdb: Add MDB get support
  rtnetlink: Add MDB get support
  selftests: bridge_mdb: Use MDB get instead of dump
  selftests: vxlan_mdb: Use MDB get instead of dump

 drivers/net/vxlan/vxlan_core.c                |   1 +
 drivers/net/vxlan/vxlan_mdb.c                 | 188 ++++++++++++++++--
 drivers/net/vxlan/vxlan_private.h             |   2 +
 include/linux/netdevice.h                     |   4 +
 include/uapi/linux/if_bridge.h                |   8 +
 net/bridge/br_device.c                        |   3 +-
 net/bridge/br_input.c                         |   2 +-
 net/bridge/br_mdb.c                           | 180 ++++++++++++++++-
 net/bridge/br_multicast.c                     |   5 +-
 net/bridge/br_private.h                       |  19 +-
 net/core/rtnetlink.c                          |  89 ++++++++-
 .../selftests/net/forwarding/bridge_mdb.sh    | 184 +++++++----------
 tools/testing/selftests/net/test_vxlan_mdb.sh | 108 +++++-----
 13 files changed, 594 insertions(+), 199 deletions(-)