kernel/linux.git/drivers/net/hyperv/hyperv_net.h, branch v4.17.1

hv_netvsc: Add range checking for rx packet offset and length

2018-03-25T21:07:40+00:00

This patch adds range checking for rx packet offset and length. It may only happen if there is a host side bug. Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: common detach logic

2018-03-22T16:45:09+00:00

Make common function for detaching internals of device during changes to MTU and RSS. Make sure no more packets are transmitted and all packets have been received before doing device teardown. Change the wait logic to be common and use usleep_range(). Changes transmit enabling logic so that transmit queues are disabled during the period when lower device is being changed. And enabled only after sub channels are setup. This avoids issue where it could be that a packet was being sent while subchannel was not initialized. Fixes: 8195b1396ec8 ("hv_netvsc: fix deadlock on hotplug") Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: avoid repeated updates of packet filter

2018-03-08T17:48:56+00:00

The netvsc driver can get repeated calls to netvsc_rx_mode during network setup; each of these calls ends up scheduling the lower layers to update tha packet filter. This update requires an request/response to the host. So avoid doing this if we already know that the correct packet filter value is set. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: empty current transmit aggregation if flow blocked

2017-12-13T20:57:39+00:00

If the transmit queue is known full, then don't keep aggregating data. And the cp_partial flag which indicates that the current aggregation buffer is full can be folded in to avoid more conditionals. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: remove open_cnt reference count

2017-12-13T20:57:39+00:00

There is only ever a single instance of network device object referencing the internal rndis object. Therefore the open_cnt atomic is not necessary. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: pass netvsc_device to receive callback

2017-12-13T20:57:39+00:00

The netvsc_receive_callback function was using RCU to find the appropriate underlying netvsc_device. Since calling function already had that pointer, this was unnecessary. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: simplify function args in receive status path

2017-12-13T20:57:38+00:00

The caller (netvsc_receive) already has the net device pointer, and should just pass that to functions rather than the hyperv device. This eliminates several impossible error paths in the process. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: track memory allocation failures in ethtool stats

2017-12-13T20:57:38+00:00

When skb can not be allocated, update ethtool statisitics rather than rx_dropped which is intended for netif_receive. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: Fix the TX/RX buffer default sizes

2017-12-13T18:25:04+00:00

The values were not computed correctly. There are no significant visible impact, though. The intended size of RX buffer is 16 MB, and the default slot size is 1728. So, NETVSC_DEFAULT_RX should be 16*1024*1024 / 1728 = 9709. The intended size of TX buffer is 1 MB, and the slot size is 6144. So, NETVSC_DEFAULT_TX should be 1024*1024 / 6144 = 170. The patch puts the formula directly into the macro, and moves them to hyperv_net.h, together with related macros. Fixes: 5023a6db73196 ("netvsc: increase default receive buffer size") Signed-off-by: Haiyang Zhang Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: Fix the receive buffer size limit

2017-12-13T18:25:04+00:00

The max should be 31 MB on host with NVSP version > 2. On legacy hosts (NVSP version <=2) only 15 MB receive buffer is allowed, otherwise the buffer request will be rejected by the host, resulting vNIC not coming up. The NVSP version is only available after negotiation. So, we add the limit checking for legacy hosts in netvsc_init_buf(). Fixes: 5023a6db73196 ("netvsc: increase default receive buffer size") Signed-off-by: Haiyang Zhang Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller