devlink: Add DMAC filter generic packet trap

Add packet trap that can report packets that were dropped due to
destination MAC filtering.

Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/networking/devlink/devlink-trap.rst b/Documentation/networking/devlink/devlink-trap.rst
index d875f3e..935b639 100644 (file)
--- a/Documentation/networking/devlink/devlink-trap.rst
+++ b/Documentation/networking/devlink/devlink-trap.rst
@@ -480,6 +480,11 @@ be added to the following table:
      - ``drop``
      - Traps packets that the device decided to drop in case they hit a
        blackhole nexthop
+   * - ``dmac_filter``
+     - ``drop``
+     - Traps incoming packets that the device decided to drop because
+       the destination MAC is not configured in the MAC table and
+       the interface is not in promiscuous mode
 
 Driver-specific Packet Traps
 ============================

diff --git a/include/net/devlink.h b/include/net/devlink.h
index d12ed28..426b98e 100644 (file)
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -838,6 +838,7 @@ enum devlink_trap_generic_id {
        DEVLINK_TRAP_GENERIC_ID_GTP_PARSING,
        DEVLINK_TRAP_GENERIC_ID_ESP_PARSING,
        DEVLINK_TRAP_GENERIC_ID_BLACKHOLE_NEXTHOP,
+       DEVLINK_TRAP_GENERIC_ID_DMAC_FILTER,
 
        /* Add new generic trap IDs above */
        __DEVLINK_TRAP_GENERIC_ID_MAX,
@@ -1063,6 +1064,8 @@ enum devlink_trap_group_generic_id {
        "esp_parsing"
 #define DEVLINK_TRAP_GENERIC_NAME_BLACKHOLE_NEXTHOP \
        "blackhole_nexthop"
+#define DEVLINK_TRAP_GENERIC_NAME_DMAC_FILTER \
+       "dest_mac_filter"
 
 #define DEVLINK_TRAP_GROUP_GENERIC_NAME_L2_DROPS \
        "l2_drops"

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 72ea798..f6e6445 100644 (file)
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -9512,6 +9512,7 @@ static const struct devlink_trap devlink_trap_generic[] = {
        DEVLINK_TRAP(GTP_PARSING, DROP),
        DEVLINK_TRAP(ESP_PARSING, DROP),
        DEVLINK_TRAP(BLACKHOLE_NEXTHOP, DROP),
+       DEVLINK_TRAP(DMAC_FILTER, DROP),
 };
 
 #define DEVLINK_TRAP_GROUP(_id)                                                      \