From: Paolo Abeni Date: Tue, 15 Mar 2022 13:43:51 +0000 (+0100) Subject: Merge branch 'netdevsim-support-for-l3-hw-stats' X-Git-Tag: v5.18-rc1~136^2~84 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=583024cf22396491d54104144ee45859265d1d55;p=thirdparty%2Fkernel%2Fstable.git Merge branch 'netdevsim-support-for-l3-hw-stats' Petr Machata says: ==================== netdevsim: Support for L3 HW stats "L3 stats" is a suite of interface statistics aimed at reflecting traffic taking place in a HW device, on an object corresponding to some software netdevice. Support for this stats suite has been added recently, in commit ca0a53dcec94 ("Merge branch 'net-hw-counters-for-soft-devices'"). In this patch set: - Patch #1 adds support for L3 stats to netdevsim. Real devices can have various conditions for when an L3 counter is available. To simulate this, netdevsim maintains a list of devices suitable for HW stats collection. Only when l3_stats is enabled on both a netdevice itself, and in netdevsim, will netdevsim contribute values to L3 stats. This enablement and disablement is done via debugfs: # echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/enable_ifindex # echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/disable_ifindex Besides this, there is a third toggle to mark a device for future failure: # echo $ifindex > /sys/kernel/debug/netdevsim/$DEV/hwstats/l3/fail_next_enable - This allows HW-independent testing of stats reporting and in-kernel APIs, as well as a test for enablement rollback, which is difficult to do otherwise. This netdevsim-specific selftest is added in patch #2. - Patch #3 adds another driver-specific selftest, namely a test aimed at checking mlxsw-induced stats monitoring events. ==================== Link: https://lore.kernel.org/r/cover.1647265833.git.petrm@nvidia.com Signed-off-by: Paolo Abeni --- 583024cf22396491d54104144ee45859265d1d55