[PATCH, net-next, v3, 0/2] net/ethtool: Introduce link_ksettings API for virtual network devices

[Cris Forno <cforno12@linux.vnet.ibm.com>]

This series provides an API for drivers of virtual network devices that allows
users to alter initial device speed and duplex settings to reflect the actual
capabilities of underlying hardware. The changes made include two helper
functions ethtool_virtdev_get/set_link_ksettings, which are used to retrieve or
update alterable link settings, respectively. In addition, there is a new
ethtool operation defined to validate those settings provided by the user. This
operation can use either a generic validation function,
ethtool_virtdev_validate_cmd, or one defined by the driver. These changes
resolve code duplication for existing virtual network drivers that have already
implemented this behavior.  In the case of the ibmveth driver, this API is used
to provide this capability for the first time.

---
v3: Factored out duplicated code to core/ethtool to provide API to virtual
    drivers
    
v2: Updated default driver speed/duplex settings to avoid breaking existing
    setups
---

Cris Forno (2):
  Three virtual devices (ibmveth, virtio_net, and netvsc) all have
    similar code to set/get link settings and validate ethtool command.
    To     eliminate duplication of code, it is factored out into
    core/ethtool.c.
  With get/set link settings functions in core/ethtool.c, ibmveth,
    netvsc, and virtio now use the core's helper function.

 drivers/net/ethernet/ibm/ibmveth.c | 60 +++++++++++++++++++++-----------------
 drivers/net/ethernet/ibm/ibmveth.h |  3 ++
 drivers/net/hyperv/netvsc_drv.c    | 21 ++++---------
 drivers/net/virtio_net.c           | 45 ++++------------------------
 include/linux/ethtool.h            |  2 ++
 net/core/ethtool.c                 | 56 +++++++++++++++++++++++++++++++++++
 6 files changed, 104 insertions(+), 83 deletions(-)

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1.8.3.1