[PATCH net-next 0/6] Dynamic toggling of vlan_filtering for SJA1105 DSA

[Vladimir Oltean <olteanv@gmail.com>]

This patchset addresses a few limitations in DSA and the bridge core
that made it impossible for this sequence of commands to work:

  ip link add name br0 type bridge
  ip link set dev swp2 master br0
  echo 1 > /sys/class/net/br0/bridge/vlan_filtering

Only this sequence was previously working:

  ip link add name br0 type bridge vlan_filtering 1
  ip link set dev swp2 master br0

On SJA1105, the situation is further complicated by the fact that
toggling vlan_filtering is causing a switch reset. However, the hardware
state restoration logic is already there in the driver. It is a matter
of the layers above which need a few fixups.

Also see this discussion thread:
https://www.spinics.net/lists/netdev/msg581042.html

Patch 1/6 is not functionally related but also related to dsa_8021q
handling of VLANs and this is a good opportunity to bring up the subject
for discussion.

Vladimir Oltean (6):
  net: dsa: tag_8021q: Future-proof the reserved fields in the custom
    VID
  net: bridge: Populate the pvid flag in br_vlan_get_info
  net: dsa: Delete the VID from the upstream port as well
  net: dsa: Don't program the VLAN as pvid on the upstream port
  net: dsa: Allow proper internal use of VLANs
  net: dsa: tag_8021q: Restore bridge pvid when enabling vlan_filtering

 net/bridge/br_vlan.c |  2 ++
 net/dsa/port.c       | 10 ++--------
 net/dsa/slave.c      |  8 ++++++++
 net/dsa/switch.c     | 25 +++++++++++++++++++++----
 net/dsa/tag_8021q.c  | 34 +++++++++++++++++++++++++++++++++-
 5 files changed, 66 insertions(+), 13 deletions(-)

-- 
2.17.1