From: Petr Machata <pe...@nvidia.com>
Add the packet trap that can report packets that were ECN marked due to RED
AQM.
Signed-off-by: Amit Cohen <amco...@nvidia.com>
Reviewed-by: Jiri Pirko <j...@nvidia.com>
Signed-off-by: Petr Machata <pe...@nvidia.com>
Signed-off-by: Ido Schimmel <ido...@nvidia.com>
---
Documentation/networking/devlink/devlink-trap.rst | 4 ++++
include/net/devlink.h | 3 +++
net/core/devlink.c | 1 +
3 files changed, 8 insertions(+)
diff --git a/Documentation/networking/devlink/devlink-trap.rst
b/Documentation/networking/devlink/devlink-trap.rst
index d875f3e1e9cf..c6026b44617e 100644
--- a/Documentation/networking/devlink/devlink-trap.rst
+++ b/Documentation/networking/devlink/devlink-trap.rst
@@ -480,6 +480,10 @@ be added to the following table:
- ``drop``
- Traps packets that the device decided to drop in case they hit a
blackhole nexthop
+ * - ``ecn_mark``
+ - ``drop``
+ - Traps ECN-capable packets that were marked with CE (Congestion
+ Encountered) code point by RED algorithm instead of being dropped
Driver-specific Packet Traps
============================
diff --git a/include/net/devlink.h b/include/net/devlink.h
index f466819cc477..dd0c0b8fba6e 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -836,6 +836,7 @@ 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_ECN_MARK,
/* Add new generic trap IDs above */
__DEVLINK_TRAP_GENERIC_ID_MAX,
@@ -1061,6 +1062,8 @@ enum devlink_trap_group_generic_id {
"esp_parsing"
#define DEVLINK_TRAP_GENERIC_NAME_BLACKHOLE_NEXTHOP \
"blackhole_nexthop"
+#define DEVLINK_TRAP_GENERIC_NAME_ECN_MARK \
+ "ecn_mark"
#define DEVLINK_TRAP_GROUP_GENERIC_NAME_L2_DROPS \
"l2_drops"
diff --git a/net/core/devlink.c b/net/core/devlink.c
index ee828e4b1007..f86688bfad46 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -9508,6 +9508,7 @@ 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(ECN_MARK, DROP),
};
#define DEVLINK_TRAP_GROUP(_id)
\
--
2.29.2
