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Message-ID: <57521B84.1040800@gmail.com> Date: Fri, 3 Jun 2016 17:06:28 -0700 From: Florian Fainelli <f.fainelli@...il.com> To: netdev@...r.kernel.org Cc: davem@...emloft.net, andrew@...n.ch, vivien.didelot@...oirfairelinux.com, john@...ozen.org Subject: Re: [PATCH net-next] net: dsa: Provide CPU port statistics to master netdev On 06/03/2016 05:05 PM, Florian Fainelli wrote: > 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. Disregard this patch, it was left in the patches folder... -- Florian
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