Date: Wed, 15 Jul 2015 16:25:52 -0600 From: Alan Somers <asomers@freebsd.org> To: FreeBSD Net <freebsd-net@freebsd.org>, Navdeep Parhar <np@freebsd.org>, "Alexander V. Chernikov" <melifaro@freebsd.org> Subject: Displaying the supported module types of a network adapter Message-ID: <CAOtMX2jpsLwaCpX7eO4fixmyWCSSOfVXEki6GiJ%2ByhrvrNOJDg@mail.gmail.com>
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SIOCGIFMEDIA will return the list of supported media types and the current media type of a network interface. But for NICs with pluggable modules (SFP+, QSFP, etc), it would also be useful to know the allowed module type. I can't find any way to determine that using the standard tools. cxgbe(4) is aware of the module type allowed by the card, but doesn't expose that information to userspace. I can add a simple sysctl to do so, but it would be better to add a standard ioctl that can be used by all network drivers. Besides cxgbe(4), can any other network drivers support this? If so, would anybody else be interested? If so, should I add it to the "ifconfig -v" output? -Alan
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