Re: setting flow spec rules under vswitch configuration

On Wed, 2012-10-10 at 16:16 +0200, Or Gerlitz wrote:
[...]

Thanks for setting the sketch of a plan here... so if we go little bit 
into details, we can safely move 20 bytes from the hadata[60] field into 
the beginning of struct ethtool_flow_ext, which will still allow old
user space to work with newer kernels. As for newer uses space that 
would like to set mac addresses within
ethtool_flow_ext, how are they supposed to identify if the kernel 
supports this extension (of the extension...)?

Well they can't tell in advance, but we can define another flag in
flow_type like FLOW_EXT and existing drivers will reject flow specs with
that flag set.

this might be newbee 
question, I didn't made many ethtool patches so far.

Also on a related note, what does the 64bit data field of 
ethtool_flow_ext used for?

Driver-dependent.  ixgbe uses it for something.

Ben.

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Ben Hutchings, Staff Engineer, Solarflare
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