Merge branch 'dsa-port-mirroring'

Florian Fainelli says:

====================
net: dsa: Port mirroring support

This patch series adds support for port mirroring in the two
Broadcom switch drivers. The major part of the functional are actually with
the plumbing between tc and the drivers.

Changes in v5:

- Added Jiri's Reviewed-by tag to first patch
- rebase against latest net-next/master after bcm_sf2 CFP series

Changes in v4:

- rebased against latest net-next/master after Vivien's changes

Changes in v3:

- removed multiline comments from added structures
- simplify error handling in dsa_slave_add_cls_matchall

Changes in v2:

- fixed filter removal logic to disable the ingress or egress mirroring
  when there are no longer ports being monitored in ingress or egress

- removed a stray list_head in dsa_port structure that is not used

Tested using the two iproute2 examples:

      tc qdisc  add dev eth1 handle ffff: ingress
      tc filter add dev eth1 parent ffff:           \
               matchall skip_sw                      \
               action mirred egress mirror           \
               dev eth2
      tc qdisc add dev eth1 handle 1: root prio
      tc filter add dev eth1 parent 1:               \
               matchall skip_sw                       \
               action mirred egress mirror            \
               dev eth2
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 33 insertions, 0 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h
index d5d618c3de64..2cb77e64d648 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -20,6 +20,8 @@
 #include <linux/phy_fixed.h>
 #include <linux/ethtool.h>
 
+struct tc_action;
+
 enum dsa_tag_protocol {
 	DSA_TAG_PROTO_NONE = 0,
 	DSA_TAG_PROTO_DSA,
@@ -139,6 +141,28 @@ struct dsa_switch_tree {
 	const struct dsa_device_ops *tag_ops;
 };
 
+/* TC matchall action types, only mirroring for now */
+enum dsa_port_mall_action_type {
+	DSA_PORT_MALL_MIRROR,
+};
+
+/* TC mirroring entry */
+struct dsa_mall_mirror_tc_entry {
+	u8 to_local_port;
+	bool ingress;
+};
+
+/* TC matchall entry */
+struct dsa_mall_tc_entry {
+	struct list_head list;
+	unsigned long cookie;
+	enum dsa_port_mall_action_type type;
+	union {
+		struct dsa_mall_mirror_tc_entry mirror;
+	};
+};
+
+
 struct dsa_port {
 	struct dsa_switch	*ds;
 	unsigned int		index;
@@ -385,6 +409,15 @@ struct dsa_switch_ops {
 			     struct ethtool_rxnfc *nfc, u32 *rule_locs);
 	int	(*set_rxnfc)(struct dsa_switch *ds, int port,
 			     struct ethtool_rxnfc *nfc);
+
+	/*
+	 * TC integration
+	 */
+	int	(*port_mirror_add)(struct dsa_switch *ds, int port,
+				   struct dsa_mall_mirror_tc_entry *mirror,
+				   bool ingress);
+	void	(*port_mirror_del)(struct dsa_switch *ds, int port,
+				   struct dsa_mall_mirror_tc_entry *mirror);
 };
 
 struct dsa_switch_driver {