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net: dsa: Add plumbing for port mirroring

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Add necessary plumbing at the slave network device level to have switch
drivers implement ndo_setup_tc() and most particularly the cls_matchall
classifier. We add support for two switch operations:

port_add_mirror and port_del_mirror() which configure, on a per-port
basis the mirror parameters requested from the cls_matchall classifier.

Code is largely borrowed from the Mellanox Spectrum switch driver.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli
2017-01-30 12:41:40 -08:00
committed by David S. Miller
parent 4be9993493
commit f50f212749
3 changed files with 172 additions and 1 deletions
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33
include/net/dsa.h
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@@ -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 {