Petr Machata says: ==================== mlxsw: PFC and headroom selftests Recent changes in the headroom management code made it clear that an automated way of testing this functionality is needed. This patchset brings two tests: a synthetic headroom behavior test, which verifies mechanics of headroom management. And a PFC test, which verifies whether this behavior actually translates into a working lossless configuration. Both of these tests rely on mlnx_qos[1], a tool that interfaces with Linux DCB API. The tool was originally written to work with Mellanox NICs, but does not actually rely on anything Mellanox-specific, and can be used for mlxsw as well as for any other NIC-like driver. Unlike Open LLDP it does support buffer commands and permits a fire-and-forget approach to configuration, which makes it very handy for writing of selftests. Patches #1-#3 extend the selftest devlink_lib.sh in various ways. Patch #4 then adds a helper wrapper for mlnx_qos to mlxsw's qos_lib.sh. Patch #5 adds a test for management of port headroom. Patch #6 adds a PFC test. [1] https://github.com/Mellanox/mlnx-tools/ ==================== Signed-off-by: David S. Miller <davem@davemloft.net>