linux-stable.git/drivers/net/hyperv/hyperv_net.h, branch v4.7

hv_netvsc: get rid of struct net_device pointer in struct netvsc_device

2016-05-16T17:26:00+00:00

Simplify netvsvc pointer graph by getting rid of the redundant ndev
pointer. We can always get a pointer to struct net_device from somewhere
else.

Signed-off-by: Vitaly Kuznetsov 
Signed-off-by: David S. Miller

hv_netvsc: untangle the pointer mess

2016-05-16T17:26:00+00:00

We have the following structures keeping netvsc adapter state:
- struct net_device
- struct net_device_context
- struct netvsc_device
- struct rndis_device
- struct hv_device
and there are pointers/dependencies between them:
- struct net_device_context is contained in struct net_device
- struct hv_device has driver_data pointer which points to
  'struct net_device' OR 'struct netvsc_device' depending on driver's
  state (!).
- struct net_device_context has a pointer to 'struct hv_device'.
- struct netvsc_device has pointers to 'struct hv_device' and
  'struct net_device_context'.
- struct rndis_device has a pointer to 'struct netvsc_device'.

Different functions get different structures as parameters and use these
pointers for traveling. The problem is (in addition to keeping in mind
this complex graph) that some of these structures (struct netvsc_device
and struct rndis_device) are being removed and re-created on mtu change
(as we implement it as re-creation of hyper-v device) so our travel using
these pointers is dangerous.

Simplify this to a the following:
- add struct netvsc_device pointer to struct net_device_context (which is
  a part of struct net_device and thus never disappears)
- remove struct hv_device and struct net_device_context pointers from
  struct netvsc_device
- replace pointer to 'struct netvsc_device' with pointer to
  'struct net_device'.
- always keep 'struct net_device' in hv_device driver_data.

We'll end up with the following 'circular' structure:

net_device:
 [net_device_context] -> netvsc_device -> rndis_device -> net_device
                      -> hv_device -> net_device

On MTU change we'll be removing the 'netvsc_device -> rndis_device'
branch and re-creating it making the synchronization easier.

There is one additional redundant pointer left, it is struct net_device
link in struct netvsc_device, it is going to be removed in a separate
commit.

Signed-off-by: Vitaly Kuznetsov 
Signed-off-by: David S. Miller

hv_netvsc: move start_remove flag to net_device_context

2016-05-16T17:26:00+00:00

struct netvsc_device is destroyed on mtu change so keeping the
protection flag there is not a good idea. Move it to struct
net_device_context which is preserved.

Signed-off-by: Vitaly Kuznetsov 
Signed-off-by: David S. Miller

hv_netvsc: Implement support for VF drivers on Hyper-V

2016-04-18T18:51:47+00:00

Support VF drivers on Hyper-V. On Hyper-V, each VF instance presented to
the guest has an associated synthetic interface that shares the MAC address
with the VF instance. Typically these are bonded together to support
live migration. By default, the host delivers all the incoming packets
on the synthetic interface. Once the VF is up, we need to explicitly switch
the data path on the host to divert traffic onto the VF interface. Even after
switching the data path, broadcast and multicast packets are always delivered
on the synthetic interface and these will have to be injected back onto the
VF interface (if VF is up).
This patch implements the necessary support in netvsc to support Linux
VF drivers.

Signed-off-by: K. Y. Srinivasan 
Reviewed-by: Haiyang Zhang 
Signed-off-by: David S. Miller

hv_netvsc: Fix the array sizes to be max supported channels

2016-03-23T18:38:55+00:00

The VRSS_CHANNEL_MAX is the max number of channels supported by Hyper-V
hosts. We use it for the related array sizes instead of using NR_CPUS,
which may be set to several thousands.
This patch reduces possible memory allocation failures.

Signed-off-by: Haiyang Zhang 
Reviewed-by: K. Y. Srinivasan 
Signed-off-by: David S. Miller

hv_netvsc: add ethtool support for set and get of settings

2016-02-29T22:08:50+00:00

This patch allows the user to set and retrieve speed and duplex of the
hv_netvsc device via ethtool.

Example:
$ ethtool eth0
Settings for eth0:
...
    Speed: Unknown!
    Duplex: Unknown! (255)
...
$ ethtool -s eth0 speed 1000 duplex full
$ ethtool eth0
Settings for eth0:
...
    Speed: 1000Mb/s
    Duplex: Full
...

This is based on patches by Roopa Prabhu and Nikolay Aleksandrov.

Signed-off-by: Simon Xiao 
Signed-off-by: David S. Miller

hv_netvsc: Fix book keeping of skb during batching process

2016-01-25T18:51:53+00:00

Since eliminating send_completion_tid from struct hv_netvsc_packet, we
haven't add proper book keeping for the skb of the batched packet. This
patch fixes this issue and allows the previous skb is properly freed.
Otherwise, a panic may happen.
Thanks to Simon Xiao  for bisecting and analysis.

Signed-off-by: Haiyang Zhang 
Reviewed-by: K. Y. Srinivasan 
Signed-off-by: David S. Miller

hv_netvsc: Eliminate vlan_tci from struct hv_netvsc_packet

2015-12-03T04:43:25+00:00

Eliminate vlan_tci from struct hv_netvsc_packet.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: David S. Miller

hv_netvsc: Eliminate status from struct hv_netvsc_packet

2015-12-03T04:43:25+00:00

Eliminate status from struct hv_netvsc_packet.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: David S. Miller

hv_netvsc: Eliminate xmit_more from struct hv_netvsc_packet

2015-12-03T04:43:25+00:00

Eliminate xmit_more from struct hv_netvsc_packet.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: David S. Miller