netdev - [RFC PATCH net-next 03/12] devlink: Add generic packet traps and groups

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Date:   Tue, 28 May 2019 15:21:27 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, mlxsw@...lanox.com,
        dsahern@...il.com, roopa@...ulusnetworks.com,
        nikolay@...ulusnetworks.com, andy@...yhouse.net,
        pablo@...filter.org, jakub.kicinski@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, andrew@...n.ch,
        f.fainelli@...il.com, vivien.didelot@...oirfairelinux.com,
        Ido Schimmel <idosch@...lanox.com>
Subject: [RFC PATCH net-next 03/12] devlink: Add generic packet traps and groups

From: Ido Schimmel <idosch@...lanox.com>

Add generic packet traps and groups that can report dropped packets as
well as exceptions such as TTL error.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
 include/net/devlink.h | 46 +++++++++++++++++++++++++++++++++++++++++++
 net/core/devlink.c    | 14 +++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 7f090cb072f4..6cfa1ab36e3f 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -525,18 +525,64 @@ struct devlink_trap {
 };
 
 enum devlink_trap_generic_id {
+	DEVLINK_TRAP_GENERIC_ID_INGRESS_SMAC_MC_DROP,
+	DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_TAG_ALLOW_DROP,
+	DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER_DROP,
+	DEVLINK_TRAP_GENERIC_ID_INGRESS_STP_FILTER_DROP,
+	DEVLINK_TRAP_GENERIC_ID_UC_EMPTY_TX_LIST_DROP,
+	DEVLINK_TRAP_GENERIC_ID_MC_EMPTY_TX_LIST_DROP,
+	DEVLINK_TRAP_GENERIC_ID_UC_LOOPBACK_FILTER_DROP,
+	DEVLINK_TRAP_GENERIC_ID_BLACKHOLE_ROUTE_DROP,
+	DEVLINK_TRAP_GENERIC_ID_TTL_ERROR_EXCEPTION,
+	DEVLINK_TRAP_GENERIC_ID_TAIL_DROP,
+	DEVLINK_TRAP_GENERIC_ID_EARLY_DROP,
+
 	/* Add new generic trap IDs above */
 	__DEVLINK_TRAP_GENERIC_ID_MAX,
 	DEVLINK_TRAP_GENERIC_ID_MAX = __DEVLINK_TRAP_GENERIC_ID_MAX - 1,
 };
 
 enum devlink_trap_group_generic_id {
+	DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS,
+	DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS,
+	DEVLINK_TRAP_GROUP_GENERIC_ID_BUFFER_DROPS,
+
 	/* Add new generic trap group IDs above */
 	__DEVLINK_TRAP_GROUP_GENERIC_ID_MAX,
 	DEVLINK_TRAP_GROUP_GENERIC_ID_MAX =
 		__DEVLINK_TRAP_GROUP_GENERIC_ID_MAX - 1,
 };
 
+#define DEVLINK_TRAP_GENERIC_NAME_INGRESS_SMAC_MC_DROP \
+	"ingress_smac_mc_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_INGRESS_VLAN_TAG_ALLOW_DROP \
+	"ingress_vlan_tag_allow_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_INGRESS_VLAN_FILTER_DROP \
+	"ingress_vlan_filter_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_INGRESS_STP_FILTER_DROP \
+	"ingress_stp_filter_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_UC_EMPTY_TX_LIST_DROP \
+	"uc_empty_tx_list_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_MC_EMPTY_TX_LIST_DROP \
+	"mc_empty_tx_list_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_UC_LOOPBACK_FILTER_DROP \
+	"uc_loopback_filter_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_BLACKHOLE_ROUTE_DROP \
+	"blackhole_route_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_TTL_ERROR_EXCEPTION \
+	"ttl_error_exception"
+#define DEVLINK_TRAP_GENERIC_NAME_TAIL_DROP \
+	"tail_drop"
+#define DEVLINK_TRAP_GENERIC_NAME_EARLY_DROP \
+	"early_drop"
+
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_L2_DROPS \
+	"l2_drops"
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_L3_DROPS \
+	"l3_drops"
+#define DEVLINK_TRAP_GROUP_GENERIC_NAME_BUFFER_DROPS \
+	"buffer_drops"
+
 #define DEVLINK_TRAP_GENERIC(_type, _init_action, _id, _group, _metadata_cap) \
 	{								      \
 		.type = DEVLINK_TRAP_TYPE_##_type,			      \
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 96a7ce6701e6..ef22e2d061fc 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -7236,6 +7236,17 @@ EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
 	}
 
 static const struct devlink_trap devlink_trap_generic[] = {
+	DEVLINK_TRAP(INGRESS_SMAC_MC_DROP, DROP),
+	DEVLINK_TRAP(INGRESS_VLAN_TAG_ALLOW_DROP, DROP),
+	DEVLINK_TRAP(INGRESS_VLAN_FILTER_DROP, DROP),
+	DEVLINK_TRAP(INGRESS_STP_FILTER_DROP, DROP),
+	DEVLINK_TRAP(UC_EMPTY_TX_LIST_DROP, DROP),
+	DEVLINK_TRAP(MC_EMPTY_TX_LIST_DROP, DROP),
+	DEVLINK_TRAP(UC_LOOPBACK_FILTER_DROP, DROP),
+	DEVLINK_TRAP(BLACKHOLE_ROUTE_DROP, DROP),
+	DEVLINK_TRAP(TTL_ERROR_EXCEPTION, EXCEPTION),
+	DEVLINK_TRAP(TAIL_DROP, DROP),
+	DEVLINK_TRAP(EARLY_DROP, DROP),
 };
 
 #define DEVLINK_TRAP_GROUP(_id)						      \
@@ -7245,6 +7256,9 @@ static const struct devlink_trap devlink_trap_generic[] = {
 	}
 
 static const struct devlink_trap_group devlink_trap_group_generic[] = {
+	DEVLINK_TRAP_GROUP(L2_DROPS),
+	DEVLINK_TRAP_GROUP(L3_DROPS),
+	DEVLINK_TRAP_GROUP(BUFFER_DROPS),
 };
 
 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
-- 
2.20.1