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Commit fdfc7dd6 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

net/sched: flower: add support for matching on tcp flags 



Benefit from the support of tcp flags dissection and allow user to
insert rules matching on tcp flags.

Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ac4bb5de

include/uapi/linux/pkt_cls.h

+3 −0
Original line number Diff line number Diff line
@@ -451,6 +451,9 @@ enum { 
	TCA_FLOWER_KEY_MPLS_TC,		/* u8 - 3 bits */

	TCA_FLOWER_KEY_MPLS_LABEL,	/* be32 - 20 bits */



	TCA_FLOWER_KEY_TCP_FLAGS,	/* be16 */

	TCA_FLOWER_KEY_TCP_FLAGS_MASK,	/* be16 */



	__TCA_FLOWER_MAX,

};

net/sched/cls_flower.c

+12 −1
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ struct fl_flow_key { 
	};

	struct flow_dissector_key_ports enc_tp;

	struct flow_dissector_key_mpls mpls;

	struct flow_dissector_key_tcp tcp;

} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */



struct fl_flow_mask_range {
@@ -424,6 +425,8 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 
	[TCA_FLOWER_KEY_MPLS_BOS]	= { .type = NLA_U8 },

	[TCA_FLOWER_KEY_MPLS_TC]	= { .type = NLA_U8 },

	[TCA_FLOWER_KEY_MPLS_LABEL]	= { .type = NLA_U32 },

	[TCA_FLOWER_KEY_TCP_FLAGS]	= { .type = NLA_U16 },

	[TCA_FLOWER_KEY_TCP_FLAGS_MASK]	= { .type = NLA_U16 },

};



static void fl_set_key_val(struct nlattr **tb,
@@ -596,6 +599,9 @@ static int fl_set_key(struct net *net, struct nlattr **tb, 
		fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,

			       &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,

			       sizeof(key->tp.dst));

		fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,

			       &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,

			       sizeof(key->tcp.flags));

	} else if (key->basic.ip_proto == IPPROTO_UDP) {

		fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,

			       &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
@@ -766,6 +772,8 @@ static void fl_init_dissector(struct cls_fl_head *head, 
			     FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);

	FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,

			     FLOW_DISSECTOR_KEY_PORTS, tp);

	FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,

			     FLOW_DISSECTOR_KEY_TCP, tcp);

	FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,

			     FLOW_DISSECTOR_KEY_ICMP, icmp);

	FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
@@ -1215,7 +1223,10 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, 
			     sizeof(key->tp.src)) ||

	     fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,

			     &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,

			     sizeof(key->tp.dst))))

			     sizeof(key->tp.dst)) ||

	     fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,

			     &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,

			     sizeof(key->tcp.flags))))

		goto nla_put_failure;

	else if (key->basic.ip_proto == IPPROTO_UDP &&

		 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,