kernel/linux.git/drivers/net/hyperv, branch linux-4.20.y

hv_netvsc: Fix IP header checksum for coalesced packets

2019-03-10T06:10:12+00:00

[ Upstream commit bf48648d650db1146b75b9bd358502431e86cf4f ] Incoming packets may have IP header checksum verified by the host. They may not have IP header checksum computed after coalescing. This patch re-compute the checksum when necessary, otherwise the packets may be dropped, because Linux network stack always checks it. Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

hv_netvsc: Fix hash key value reset after other ops

2019-03-05T16:59:41+00:00

[ Upstream commit 17d91256898402daf4425cc541ac9cbf64574d9a ] Changing mtu, channels, or buffer sizes ops call to netvsc_attach(), rndis_set_subchannel(), which always reset the hash key to default value. That will override hash key changed previously. This patch fixes the problem by save the hash key, then restore it when we re- add the netvsc device. Fixes: ff4a44199012 ("netvsc: allow get/set of RSS indirection table") Signed-off-by: Haiyang Zhang Reviewed-by: Michael Kelley [sl: fix up subject line] Signed-off-by: Sasha Levin

hv_netvsc: Refactor assignments of struct netvsc_device_info

2019-03-05T16:59:41+00:00

[ Upstream commit 7c9f335a3ff20557a92584199f3d35c7e992bbe5 ] These assignments occur in multiple places. The patch refactor them to a function for simplicity. It also puts the struct to heap area for future expension. Signed-off-by: Haiyang Zhang Reviewed-by: Michael Kelley [sl: fix up subject line] Signed-off-by: Sasha Levin

hv_netvsc: Fix ethtool change hash key error

2019-03-05T16:59:40+00:00

[ Upstream commit b4a10c750424e01b5e37372fef0a574ebf7b56c3 ] Hyper-V hosts require us to disable RSS before changing RSS key, otherwise the changing request will fail. This patch fixes the coding error. Fixes: ff4a44199012 ("netvsc: allow get/set of RSS indirection table") Reported-by: Wei Hu Signed-off-by: Haiyang Zhang Reviewed-by: Michael Kelley [sl: fix up subject line] Signed-off-by: Sasha Levin

hv_netvsc: fix vf serial matching with pci slot info

2018-10-16T05:58:11+00:00

The VF device's serial number is saved as a string in PCI slot's kobj name, not the slot->number. This patch corrects the netvsc driver, so the VF device can be successfully paired with synthetic NIC. Fixes: 00d7ddba1143 ("hv_netvsc: pair VF based on serial number") Reported-by: Vitaly Kuznetsov Signed-off-by: Haiyang Zhang Reviewed-by: Stephen Hemminger Signed-off-by: David S. Miller

hv_netvsc: remove ndo_poll_controller

2018-10-03T05:57:34+00:00

Similar to other patches from ERic. As diagnosed by Song Liu, ndo_poll_controller() can be very dangerous on loaded hosts, since the cpu calling ndo_poll_controller() might steal all NAPI contexts (for all RX/TX queues of the NIC). This capture can last for unlimited amount of time, since one cpu is generally not able to drain all the queues under load. In netvsc driver it uses NAPI for TX completions. The default poll_napi will do this for us now and avoid the capture. Signed-off-by: Stephen Hemminger Cc: Haiyang Zhang Cc: Eric Dumazet Reviewed-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: Fix rndis_per_packet_info internal field initialization

2018-10-02T06:15:17+00:00

The RSC feature -- a bit field "internal" was added here with total size unchanged: struct rndis_per_packet_info { u32 size; u32 type:31; u32 internal:1; u32 ppi_offset; }; On TX path, we put rndis msg into skb head room, which is not zeroed before passing to us. We do not use the "internal" field in TX path, but it may impact older hosts which use the entire 32 bits as "type". To fix the bug, this patch sets the field "internal" to zero. Fixes: c8e4eff4675f ("hv_netvsc: Add support for LRO/RSC in the vSwitch") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: Add handler for LRO setting change

2018-09-23T00:23:16+00:00

This patch adds the handler for LRO setting change, so that a user can use ethtool command to enable / disable LRO feature. Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: Add support for LRO/RSC in the vSwitch

2018-09-23T00:23:15+00:00

LRO/RSC in the vSwitch is a feature available in Windows Server 2019 hosts and later. It reduces the per packet processing overhead by coalescing multiple TCP segments when possible. This patch adds netvsc driver support for this feature. Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: pair VF based on serial number

2018-09-17T14:59:41+00:00

Matching network device based on MAC address is problematic since a non VF network device can be creted with a duplicate MAC address causing confusion and problems. The VMBus API does provide a serial number that is a better matching method. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller