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Commit a7ad40d0 authored by Edward Cree's avatar Edward Cree Committed by David S. Miller
Browse files

sfc: implement IPv6 NFC (and IPV4_USER_FLOW) 



Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Reviewed-by: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 72bb6872

drivers/net/ethernet/sfc/ethtool.c

+184 −0
Original line number Diff line number Diff line
@@ -783,14 +783,26 @@ static int efx_ethtool_reset(struct net_device *net_dev, u32 *flags) 
static const u8 mac_addr_ig_mask[ETH_ALEN] __aligned(2) = {0x01, 0, 0, 0, 0, 0};



#define IP4_ADDR_FULL_MASK	((__force __be32)~0)

#define IP_PROTO_FULL_MASK	0xFF

#define PORT_FULL_MASK		((__force __be16)~0)

#define ETHER_TYPE_FULL_MASK	((__force __be16)~0)



static inline void ip6_fill_mask(__be32 *mask)

{

	mask[0] = mask[1] = mask[2] = mask[3] = ~(__be32)0;

}



static int efx_ethtool_get_class_rule(struct efx_nic *efx,

				      struct ethtool_rx_flow_spec *rule)

{

	struct ethtool_tcpip4_spec *ip_entry = &rule->h_u.tcp_ip4_spec;

	struct ethtool_tcpip4_spec *ip_mask = &rule->m_u.tcp_ip4_spec;

	struct ethtool_usrip4_spec *uip_entry = &rule->h_u.usr_ip4_spec;

	struct ethtool_usrip4_spec *uip_mask = &rule->m_u.usr_ip4_spec;

	struct ethtool_tcpip6_spec *ip6_entry = &rule->h_u.tcp_ip6_spec;

	struct ethtool_tcpip6_spec *ip6_mask = &rule->m_u.tcp_ip6_spec;

	struct ethtool_usrip6_spec *uip6_entry = &rule->h_u.usr_ip6_spec;

	struct ethtool_usrip6_spec *uip6_mask = &rule->m_u.usr_ip6_spec;

	struct ethhdr *mac_entry = &rule->h_u.ether_spec;

	struct ethhdr *mac_mask = &rule->m_u.ether_spec;

	struct efx_filter_spec spec;
@@ -833,6 +845,35 @@ static int efx_ethtool_get_class_rule(struct efx_nic *efx, 
			ip_entry->psrc = spec.rem_port;

			ip_mask->psrc = PORT_FULL_MASK;

		}

	} else if ((spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE) &&

	    spec.ether_type == htons(ETH_P_IPV6) &&

	    (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) &&

	    (spec.ip_proto == IPPROTO_TCP || spec.ip_proto == IPPROTO_UDP) &&

	    !(spec.match_flags &

	      ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |

		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |

		EFX_FILTER_MATCH_IP_PROTO |

		EFX_FILTER_MATCH_LOC_PORT | EFX_FILTER_MATCH_REM_PORT))) {

		rule->flow_type = ((spec.ip_proto == IPPROTO_TCP) ?

				   TCP_V6_FLOW : UDP_V6_FLOW);

		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {

			memcpy(ip6_entry->ip6dst, spec.loc_host,

			       sizeof(ip6_entry->ip6dst));

			ip6_fill_mask(ip6_mask->ip6dst);

		}

		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {

			memcpy(ip6_entry->ip6src, spec.rem_host,

			       sizeof(ip6_entry->ip6src));

			ip6_fill_mask(ip6_mask->ip6src);

		}

		if (spec.match_flags & EFX_FILTER_MATCH_LOC_PORT) {

			ip6_entry->pdst = spec.loc_port;

			ip6_mask->pdst = PORT_FULL_MASK;

		}

		if (spec.match_flags & EFX_FILTER_MATCH_REM_PORT) {

			ip6_entry->psrc = spec.rem_port;

			ip6_mask->psrc = PORT_FULL_MASK;

		}

	} else if (!(spec.match_flags &

		     ~(EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_LOC_MAC_IG |

		       EFX_FILTER_MATCH_REM_MAC | EFX_FILTER_MATCH_ETHER_TYPE |
@@ -855,6 +896,47 @@ static int efx_ethtool_get_class_rule(struct efx_nic *efx, 
			mac_entry->h_proto = spec.ether_type;

			mac_mask->h_proto = ETHER_TYPE_FULL_MASK;

		}

	} else if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&

		   spec.ether_type == htons(ETH_P_IP) &&

		   !(spec.match_flags &

		     ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |

		       EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |

		       EFX_FILTER_MATCH_IP_PROTO))) {

		rule->flow_type = IPV4_USER_FLOW;

		uip_entry->ip_ver = ETH_RX_NFC_IP4;

		if (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) {

			uip_mask->proto = IP_PROTO_FULL_MASK;

			uip_entry->proto = spec.ip_proto;

		}

		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {

			uip_entry->ip4dst = spec.loc_host[0];

			uip_mask->ip4dst = IP4_ADDR_FULL_MASK;

		}

		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {

			uip_entry->ip4src = spec.rem_host[0];

			uip_mask->ip4src = IP4_ADDR_FULL_MASK;

		}

	} else if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&

		   spec.ether_type == htons(ETH_P_IPV6) &&

		   !(spec.match_flags &

		     ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |

		       EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |

		       EFX_FILTER_MATCH_IP_PROTO))) {

		rule->flow_type = IPV6_USER_FLOW;

		if (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) {

			uip6_mask->l4_proto = IP_PROTO_FULL_MASK;

			uip6_entry->l4_proto = spec.ip_proto;

		}

		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {

			memcpy(uip6_entry->ip6dst, spec.loc_host,

			       sizeof(uip6_entry->ip6dst));

			ip6_fill_mask(uip6_mask->ip6dst);

		}

		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {

			memcpy(uip6_entry->ip6src, spec.rem_host,

			       sizeof(uip6_entry->ip6src));

			ip6_fill_mask(uip6_mask->ip6src);

		}

	} else {

		/* The above should handle all filters that we insert */

		WARN_ON(1);
@@ -946,11 +1028,27 @@ efx_ethtool_get_rxnfc(struct net_device *net_dev, 
	}

}



static inline bool ip6_mask_is_full(__be32 mask[4])

{

	return !~(mask[0] & mask[1] & mask[2] & mask[3]);

}



static inline bool ip6_mask_is_empty(__be32 mask[4])

{

	return !(mask[0] | mask[1] | mask[2] | mask[3]);

}



static int efx_ethtool_set_class_rule(struct efx_nic *efx,

				      struct ethtool_rx_flow_spec *rule)

{

	struct ethtool_tcpip4_spec *ip_entry = &rule->h_u.tcp_ip4_spec;

	struct ethtool_tcpip4_spec *ip_mask = &rule->m_u.tcp_ip4_spec;

	struct ethtool_usrip4_spec *uip_entry = &rule->h_u.usr_ip4_spec;

	struct ethtool_usrip4_spec *uip_mask = &rule->m_u.usr_ip4_spec;

	struct ethtool_tcpip6_spec *ip6_entry = &rule->h_u.tcp_ip6_spec;

	struct ethtool_tcpip6_spec *ip6_mask = &rule->m_u.tcp_ip6_spec;

	struct ethtool_usrip6_spec *uip6_entry = &rule->h_u.usr_ip6_spec;

	struct ethtool_usrip6_spec *uip6_mask = &rule->m_u.usr_ip6_spec;

	struct ethhdr *mac_entry = &rule->h_u.ether_spec;

	struct ethhdr *mac_mask = &rule->m_u.ether_spec;

	struct efx_filter_spec spec;
@@ -1012,6 +1110,92 @@ static int efx_ethtool_set_class_rule(struct efx_nic *efx, 
			return -EINVAL;

		break;



	case TCP_V6_FLOW:

	case UDP_V6_FLOW:

		spec.match_flags = (EFX_FILTER_MATCH_ETHER_TYPE |

				    EFX_FILTER_MATCH_IP_PROTO);

		spec.ether_type = htons(ETH_P_IPV6);

		spec.ip_proto = ((rule->flow_type & ~FLOW_EXT) == TCP_V6_FLOW ?

				 IPPROTO_TCP : IPPROTO_UDP);

		if (!ip6_mask_is_empty(ip6_mask->ip6dst)) {

			if (!ip6_mask_is_full(ip6_mask->ip6dst))

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;

			memcpy(spec.loc_host, ip6_entry->ip6dst, sizeof(spec.loc_host));

		}

		if (!ip6_mask_is_empty(ip6_mask->ip6src)) {

			if (!ip6_mask_is_full(ip6_mask->ip6src))

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;

			memcpy(spec.rem_host, ip6_entry->ip6src, sizeof(spec.rem_host));

		}

		if (ip6_mask->pdst) {

			if (ip6_mask->pdst != PORT_FULL_MASK)

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_LOC_PORT;

			spec.loc_port = ip6_entry->pdst;

		}

		if (ip6_mask->psrc) {

			if (ip6_mask->psrc != PORT_FULL_MASK)

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_REM_PORT;

			spec.rem_port = ip6_entry->psrc;

		}

		if (ip6_mask->tclass)

			return -EINVAL;

		break;



	case IPV4_USER_FLOW:

		if (uip_mask->l4_4_bytes || uip_mask->tos || uip_mask->ip_ver ||

		    uip_entry->ip_ver != ETH_RX_NFC_IP4)

			return -EINVAL;

		spec.match_flags = EFX_FILTER_MATCH_ETHER_TYPE;

		spec.ether_type = htons(ETH_P_IP);

		if (uip_mask->ip4dst) {

			if (uip_mask->ip4dst != IP4_ADDR_FULL_MASK)

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;

			spec.loc_host[0] = uip_entry->ip4dst;

		}

		if (uip_mask->ip4src) {

			if (uip_mask->ip4src != IP4_ADDR_FULL_MASK)

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;

			spec.rem_host[0] = uip_entry->ip4src;

		}

		if (uip_mask->proto) {

			if (uip_mask->proto != IP_PROTO_FULL_MASK)

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_IP_PROTO;

			spec.ip_proto = uip_entry->proto;

		}

		break;



	case IPV6_USER_FLOW:

		if (uip6_mask->l4_4_bytes || uip6_mask->tclass)

			return -EINVAL;

		spec.match_flags = EFX_FILTER_MATCH_ETHER_TYPE;

		spec.ether_type = htons(ETH_P_IPV6);

		if (!ip6_mask_is_empty(uip6_mask->ip6dst)) {

			if (!ip6_mask_is_full(uip6_mask->ip6dst))

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;

			memcpy(spec.loc_host, uip6_entry->ip6dst, sizeof(spec.loc_host));

		}

		if (!ip6_mask_is_empty(uip6_mask->ip6src)) {

			if (!ip6_mask_is_full(uip6_mask->ip6src))

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;

			memcpy(spec.rem_host, uip6_entry->ip6src, sizeof(spec.rem_host));

		}

		if (uip6_mask->l4_proto) {

			if (uip6_mask->l4_proto != IP_PROTO_FULL_MASK)

				return -EINVAL;

			spec.match_flags |= EFX_FILTER_MATCH_IP_PROTO;

			spec.ip_proto = uip6_entry->l4_proto;

		}

		break;



	case ETHER_FLOW:

		if (!is_zero_ether_addr(mac_mask->h_dest)) {

			if (ether_addr_equal(mac_mask->h_dest,