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Commit 486e3981 authored by Haiyang Zhang's avatar Haiyang Zhang Committed by David S. Miller
Browse files

hv_netvsc: Change the hash level variable to bit flags 



This simplifies the logic and make it easier to add more
options.

Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c1b85a19

drivers/net/hyperv/hyperv_net.h

+9 −2
Original line number Diff line number Diff line
@@ -704,6 +704,14 @@ struct netvsc_reconfig { 
	u32 event;

};



/* L4 hash bits for different protocols */

#define HV_TCP4_L4HASH 1

#define HV_TCP6_L4HASH 2

#define HV_UDP4_L4HASH 4

#define HV_UDP6_L4HASH 8

#define HV_DEFAULT_L4HASH (HV_TCP4_L4HASH | HV_TCP6_L4HASH | HV_UDP4_L4HASH | \

			   HV_UDP6_L4HASH)



/* The context of the netvsc device  */

struct net_device_context {

	/* point back to our device context */
@@ -726,10 +734,9 @@ struct net_device_context { 
	u32 tx_send_table[VRSS_SEND_TAB_SIZE];



	/* Ethtool settings */

	bool udp4_l4_hash;

	bool udp6_l4_hash;

	u8 duplex;

	u32 speed;

	u32 l4_hash; /* L4 hash settings */

	struct netvsc_ethtool_stats eth_stats;



	/* State to manage the associated VF interface. */

drivers/net/hyperv/netvsc_drv.c

+50 −23
Original line number Diff line number Diff line
@@ -203,7 +203,7 @@ static inline u32 netvsc_get_hash( 
	const struct net_device_context *ndc)

{

	struct flow_keys flow;

	u32 hash;

	u32 hash, pkt_proto = 0;

	static u32 hashrnd __read_mostly;



	net_get_random_once(&hashrnd, sizeof(hashrnd));
@@ -211,11 +211,25 @@ static inline u32 netvsc_get_hash( 
	if (!skb_flow_dissect_flow_keys(skb, &flow, 0))

		return 0;



	if (flow.basic.ip_proto == IPPROTO_TCP ||

	    (flow.basic.ip_proto == IPPROTO_UDP &&

	     ((flow.basic.n_proto == htons(ETH_P_IP) && ndc->udp4_l4_hash) ||

	      (flow.basic.n_proto == htons(ETH_P_IPV6) &&

	       ndc->udp6_l4_hash)))) {

	switch (flow.basic.ip_proto) {

	case IPPROTO_TCP:

		if (flow.basic.n_proto == htons(ETH_P_IP))

			pkt_proto = HV_TCP4_L4HASH;

		else if (flow.basic.n_proto == htons(ETH_P_IPV6))

			pkt_proto = HV_TCP6_L4HASH;



		break;



	case IPPROTO_UDP:

		if (flow.basic.n_proto == htons(ETH_P_IP))

			pkt_proto = HV_UDP4_L4HASH;

		else if (flow.basic.n_proto == htons(ETH_P_IPV6))

			pkt_proto = HV_UDP6_L4HASH;



		break;

	}



	if (pkt_proto & ndc->l4_hash) {

		return skb_get_hash(skb);

	} else {

		if (flow.basic.n_proto == htons(ETH_P_IP))
@@ -898,8 +912,7 @@ static void netvsc_init_settings(struct net_device *dev) 
{

	struct net_device_context *ndc = netdev_priv(dev);



	ndc->udp4_l4_hash = true;

	ndc->udp6_l4_hash = true;

	ndc->l4_hash = HV_DEFAULT_L4HASH;



	ndc->speed = SPEED_UNKNOWN;

	ndc->duplex = DUPLEX_FULL;
@@ -1245,23 +1258,25 @@ static int 
netvsc_get_rss_hash_opts(struct net_device_context *ndc,

			 struct ethtool_rxnfc *info)

{

	const u32 l4_flag = RXH_L4_B_0_1 | RXH_L4_B_2_3;



	info->data = RXH_IP_SRC | RXH_IP_DST;



	switch (info->flow_type) {

	case TCP_V4_FLOW:

	case TCP_V6_FLOW:

		info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;

		info->data |= l4_flag;

		break;



	case UDP_V4_FLOW:

		if (ndc->udp4_l4_hash)

			info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;

		if (ndc->l4_hash & HV_UDP4_L4HASH)

			info->data |= l4_flag;



		break;



	case UDP_V6_FLOW:

		if (ndc->udp6_l4_hash)

			info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;

		if (ndc->l4_hash & HV_UDP6_L4HASH)

			info->data |= l4_flag;



		break;
@@ -1302,23 +1317,35 @@ static int netvsc_set_rss_hash_opts(struct net_device_context *ndc, 
{

	if (info->data == (RXH_IP_SRC | RXH_IP_DST |

			   RXH_L4_B_0_1 | RXH_L4_B_2_3)) {

		if (info->flow_type == UDP_V4_FLOW)

			ndc->udp4_l4_hash = true;

		else if (info->flow_type == UDP_V6_FLOW)

			ndc->udp6_l4_hash = true;

		else

		switch (info->flow_type) {

		case UDP_V4_FLOW:

			ndc->l4_hash |= HV_UDP4_L4HASH;

			break;



		case UDP_V6_FLOW:

			ndc->l4_hash |= HV_UDP6_L4HASH;

			break;



		default:

			return -EOPNOTSUPP;

		}



		return 0;

	}



	if (info->data == (RXH_IP_SRC | RXH_IP_DST)) {

		if (info->flow_type == UDP_V4_FLOW)

			ndc->udp4_l4_hash = false;

		else if (info->flow_type == UDP_V6_FLOW)

			ndc->udp6_l4_hash = false;

		else

		switch (info->flow_type) {

		case UDP_V4_FLOW:

			ndc->l4_hash &= ~HV_UDP4_L4HASH;

			break;



		case UDP_V6_FLOW:

			ndc->l4_hash &= ~HV_UDP6_L4HASH;

			break;



		default:

			return -EOPNOTSUPP;

		}



		return 0;

	}