[PATCH v2 net-next 0/9] DSA with VLAN filtering and offloading masters

[Vladimir Oltean <vladimir.oltean@nxp.com>]

This series attempts to make DSA VLANs work in the presence of a master
interface that is:
- filtering, so it drops VLANs that aren't explicitly added to its
  filter list
- offloading, so the old assumptions in the tagging code about there
  being a VLAN tag in the skb are not necessarily true anymore.

For more context:
https://lore.kernel.org/netdev/20200910150738.mwhh2i6j2qgacqev@skbuf/

This probably marks the beginning of a series of patches in which DSA
starts paying much more attention to its upper interfaces, not only for
VLAN purposes but also for address filtering and for management of the
CPU flooding domain. There was a comment from Florian on whether we
could factor some of the mlxsw logic into some common functionality, but
it doesn't look so. This seems bound to be open-coded, but frankly there
isn't a lot to it.

Changes in v2:
Applied Florian's cosmetic suggestion in patch 4/9.

Vladimir Oltean (9):
  net: dsa: deny enslaving 802.1Q upper to VLAN-aware bridge from
    PRECHANGEUPPER
  net: dsa: rename dsa_slave_upper_vlan_check to something more
    suggestive
  net: dsa: convert check for 802.1Q upper when bridged into
    PRECHANGEUPPER
  net: dsa: convert denying bridge VLAN with existing 8021q upper to
    PRECHANGEUPPER
  net: dsa: refuse configuration in prepare phase of
    dsa_port_vlan_filtering()
  net: dsa: allow 8021q uppers while the bridge has vlan_filtering=0
  net: dsa: install VLANs into the master's RX filter too
  net: dsa: tag_8021q: add VLANs to the master interface too
  net: dsa: tag_sja1105: add compatibility with hwaccel VLAN tags

 drivers/net/dsa/sja1105/sja1105_main.c |   7 +-
 include/linux/dsa/8021q.h              |   2 +
 net/dsa/port.c                         |  58 +++++++--
 net/dsa/slave.c                        | 156 ++++++++++++++++++-------
 net/dsa/switch.c                       |  41 -------
 net/dsa/tag_8021q.c                    |  20 +++-
 net/dsa/tag_sja1105.c                  |  21 +++-
 7 files changed, 206 insertions(+), 99 deletions(-)

-- 
2.25.1