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Open Source and information security mailing list archives
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Date: Sat, 14 May 2016 22:26:53 +0200 From: Richard Cochran <richardcochran@...il.com> To: Guy Harris <guy@...m.mit.edu> Cc: Network Development <netdev@...r.kernel.org> Subject: Re: What ixgbe devices support HWTSTAMP_FILTER_ALL for hardware time stamping? On Sat, May 14, 2016 at 11:47:22AM -0700, Guy Harris wrote: > So if you have a GUI application for packet capture, with a combo box to select the type of time stamping, should it: > > 1) regardless of whether ETHTOOL_GET_TS_INFO is available, open the adapter, try each of the time stamp types to see whether it works, and show a combo box based on that; > > 2) use ETHTOOL_GET_TS_INFO if available; > > 3) offer all possibilities regardless of whether they work with the adapter or not, and just report an error for possibilities that don't work? > > My preference is 2) - which is the main reason why libpcap offers "what possibilities are available?" APIs, not just "request this possibility" APIs. You are going to have to implement #1 in any case, if you want your program to work on all kernels. IIRC get_ts_info appeared in 3.5. Thanks, Richard
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