From: Florian Fainelli <f.faine...@gmail.com> Date: Wed, 27 Apr 2016 11:45:14 -0700
> This patch overloads the DSA master netdev, aka CPU Ethernet MAC to also > include switch-side statistics, which is useful for debugging purposes, > when the switch is not properly connected to the Ethernet MAC (duplex > mismatch, (RG)MII electrical issues etc.). > > We accomplish this by retaining the original copy of the master netdev's > ethtool_ops, and just overload the 3 operations we care about: > get_sset_count, get_strings and get_ethtool_stats so as to intercept > these calls and call into the original master_netdev ethtool_ops, plus > our own. > > We take this approach as opposed to providing a set of DSA helper > functions that would retrive the CPU port's statistics, because the > entire purpose of DSA is to allow unmodified Ethernet MAC drivers to be > used as CPU conduit interfaces, therefore, statistics overlay in such > drivers would simply not scale. > > The new ethtool -S <iface> output would therefore look like this now: > <iface> statistics > p<2 digits cpu port number>_<switch MIB counter names> > > Signed-off-by: Florian Fainelli <f.faine...@gmail.com> Applied, thanks Florian.
