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Merge branch 'hyperv'

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K. Y. Srinivasan says:

====================
Fix issues with Heper-V network offload code

WS2008 R2 does not support udp checksum offload. Furthermore, ws2012 and
ws2012 r2 have issues offloading udp checksum from Linux guests.
This patch-set addresses these issues as well as other bug fixes.
Please apply.

In this version, I have addressed the comment from David Miller with reagards
to COWing the skb prior to modifying the header (patch 3/3).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2014-04-11 15:15:22 -04:00
commit ad20d5f673
4 changed files with 41 additions and 4 deletions
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1
drivers/net/hyperv/hyperv_net.h
View File

@ -747,6 +747,7 @@ struct ndis_oject_header {
#define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4 0
#define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6 1
#define VERSION_4_OFFLOAD_SIZE 22
/*
* New offload OIDs for NDIS 6
*/

2
drivers/net/hyperv/netvsc.c
View File

@ -344,7 +344,7 @@ static int netvsc_connect_vsp(struct hv_device *device)
memset(init_packet, 0, sizeof(struct nvsp_message));
if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4)
ndis_version = 0x00050001;
ndis_version = 0x00060001;
else
ndis_version = 0x0006001e;

30
drivers/net/hyperv/netvsc_drv.c
View File

@ -319,7 +319,9 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
packet = kzalloc(sizeof(struct hv_netvsc_packet) +
(num_data_pgs * sizeof(struct hv_page_buffer)) +
sizeof(struct rndis_message) +
NDIS_VLAN_PPI_SIZE, GFP_ATOMIC);
NDIS_VLAN_PPI_SIZE +
NDIS_CSUM_PPI_SIZE +
NDIS_LSO_PPI_SIZE, GFP_ATOMIC);
if (!packet) {
/* out of memory, drop packet */
netdev_err(net, "unable to allocate hv_netvsc_packet\n");
@ -396,7 +398,30 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
csum_info->transmit.tcp_checksum = 1;
csum_info->transmit.tcp_header_offset = hdr_offset;
} else if (net_trans_info & INFO_UDP) {
csum_info->transmit.udp_checksum = 1;
/* UDP checksum offload is not supported on ws2008r2.
* Furthermore, on ws2012 and ws2012r2, there are some
* issues with udp checksum offload from Linux guests.
* (these are host issues).
* For now compute the checksum here.
*/
struct udphdr *uh;
u16 udp_len;
ret = skb_cow_head(skb, 0);
if (ret)
goto drop;
uh = udp_hdr(skb);
udp_len = ntohs(uh->len);
uh->check = 0;
uh->check = csum_tcpudp_magic(ip_hdr(skb)->saddr,
ip_hdr(skb)->daddr,
udp_len, IPPROTO_UDP,
csum_partial(uh, udp_len, 0));
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
csum_info->transmit.udp_checksum = 0;
}
goto do_send;
@ -436,6 +461,7 @@ do_send:
ret = netvsc_send(net_device_ctx->device_ctx, packet);
drop:
if (ret == 0) {
net->stats.tx_bytes += skb->len;
net->stats.tx_packets++;

12
drivers/net/hyperv/rndis_filter.c
View File

@ -641,6 +641,16 @@ int rndis_filter_set_offload_params(struct hv_device *hdev,
struct rndis_set_complete *set_complete;
u32 extlen = sizeof(struct ndis_offload_params);
int ret, t;
u32 vsp_version = nvdev->nvsp_version;
if (vsp_version <= NVSP_PROTOCOL_VERSION_4) {
extlen = VERSION_4_OFFLOAD_SIZE;
/* On NVSP_PROTOCOL_VERSION_4 and below, we do not support
* UDP checksum offload.
*/
req_offloads->udp_ip_v4_csum = 0;
req_offloads->udp_ip_v6_csum = 0;
}
request = get_rndis_request(rdev, RNDIS_MSG_SET,
RNDIS_MESSAGE_SIZE(struct rndis_set_request) + extlen);
@ -674,7 +684,7 @@ int rndis_filter_set_offload_params(struct hv_device *hdev,
} else {
set_complete = &request->response_msg.msg.set_complete;
if (set_complete->status != RNDIS_STATUS_SUCCESS) {
netdev_err(ndev, "Fail to set MAC on host side:0x%x\n",
netdev_err(ndev, "Fail to set offload on host side:0x%x\n",
set_complete->status);
ret = -EINVAL;
}