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| author | David S. Miller <davem@davemloft.net> | 2020-08-03 18:06:47 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-08-03 18:06:47 -0700 |
| commit | f8deaea06fb5002a9ebb7a366ef4066e2d7e0944 (patch) | |
| tree | e9cf6d6e724faf4042b24e4587d3fe637a174d42 /Documentation | |
| parent | 80fbbb1672e7815a15d7329638537961d65c453d (diff) | |
| parent | 8fb6ac457d5be8516eeed2b92342f7f95c448275 (diff) | |
Merge branch 'mlxsw-Add-support-for-buffer-drop-traps'
Ido Schimmel says:
====================
mlxsw: Add support for buffer drop traps
Petr says:
A recent patch set added the ability to mirror buffer related drops
(e.g., early drops) through a netdev. This patch set adds the ability to
trap such packets to the local CPU for analysis.
The trapping towards the CPU is configured by using tc-trap action
instead of tc-mirred as was done when the packets were mirrored through
a netdev. A future patch set will also add the ability to sample the
dropped packets using tc-sample action.
The buffer related drop traps are added to devlink, which means that the
dropped packets can be reported to user space via the kernel's
drop_monitor module.
Patch set overview:
Patch #1 adds the early_drop trap to devlink
Patch #2 adds extack to a few devlink operations to facilitate better
error reporting to user space. This is necessary - among other things -
because the action of buffer drop traps cannot be changed in mlxsw
Patch #3 performs a small refactoring in mlxsw, patch #4 fixes a bug that
this patchset would trigger.
Patches #5-#6 add the infrastructure required to support different traps
/ trap groups in mlxsw per-ASIC. This is required because buffer drop
traps are not supported by Spectrum-1
Patch #7 extends mlxsw to register the early_drop trap
Patch #8 adds the offload logic for the "trap" action at a qevent block.
Patch #9 adds a mlxsw-specific selftest.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/devlink/devlink-trap.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/devlink-trap.rst b/Documentation/networking/devlink/devlink-trap.rst index 2014307fbe63..7a798352b45d 100644 --- a/Documentation/networking/devlink/devlink-trap.rst +++ b/Documentation/networking/devlink/devlink-trap.rst @@ -405,6 +405,10 @@ be added to the following table: - ``control`` - Traps packets logged during processing of flow action trap (e.g., via tc's trap action) + * - ``early_drop`` + - ``drop`` + - Traps packets dropped due to the RED (Random Early Detection) algorithm + (i.e., early drops) Driver-specific Packet Traps ============================ |