IB/core: Add more fields to IPv6 flow specification

Add the following fields to IPv6 flow filter specification:
1. Traffic Class
2. Flow Label
3. Next Header
4. Hop Limit

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/uverbs_cmd.c

@@ -3158,6 +3158,10 @@ static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
 		ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
 		memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
 		memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
+
+		if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
+		    (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
+			return -EINVAL;
 		break;
 	case IB_FLOW_SPEC_TCP:
 	case IB_FLOW_SPEC_UDP:

include/rdma/ib_verbs.h

@@ -1676,6 +1676,10 @@ struct ib_flow_spec_ipv4 {
 struct ib_flow_ipv6_filter {
 	u8	src_ip[16];
 	u8	dst_ip[16];
+	__be32	flow_label;
+	u8	next_hdr;
+	u8	traffic_class;
+	u8	hop_limit;
 	/* Must be last */
 	u8	real_sz[0];
 };

include/uapi/rdma/ib_user_verbs.h

@@ -886,8 +886,13 @@ struct ib_uverbs_flow_spec_tcp_udp {
 };
 
 struct ib_uverbs_flow_ipv6_filter {
-	__u8 src_ip[16];
-	__u8 dst_ip[16];
+	__u8    src_ip[16];
+	__u8    dst_ip[16];
+	__be32	flow_label;
+	__u8	next_hdr;
+	__u8	traffic_class;
+	__u8	hop_limit;
+	__u8	reserved;
 };
 
 struct ib_uverbs_flow_spec_ipv6 {