[PATCH 0/3] net: propagate dynamic needed_headroom/tailroom changes

["Florian Fainelli" <f.fainelli@gmail.com>]

Hi all,

This patchset aims at allowing dynamically changing a given device
needed_headroom/tailroom space and propagating such events to stacked
devices such as bridges and vlans.

Unless callers use the new helpers (dev_set_headroom/dev_set_tailroom)
there is no functional change introduced.

I tested this with an out of tree Ethernet driver with both VLANs and
bridges and the need for a 64-byte headroom to insert a transmit
status descriptor in front of a SKB.

Since I am not familiar with all subsystems/drivers changing the
needed_headroom/tailroom requirements, I would leave that to them.

Florian Fainelli (3):
  net: add a new NETDEV_CHANGEROOM event type
  net: vlan: handle NETDEV_CHANGEROOM events
  net: bridge: handle NETDEV_CHANGEROOM event

 include/linux/netdevice.h |  3 +++
 net/8021q/vlan.c          |  7 +++++++
 net/bridge/br_if.c        | 32 ++++++++++++++++++++++++++++++++
 net/bridge/br_notify.c    |  5 +++++
 net/bridge/br_private.h   |  2 ++
 net/core/dev.c            | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 95 insertions(+)

-- 
1.8.1.2