Displaying the supported module types of a network adapter

[Eric Joyner]

ixl(4) will list all of the supported module types for the device if you
use ifconfig -m, but I know that isn't the intended purpose of the -m flag.
I wouldn't mind moving all of that to another function whose purpose is to
just list all supported module types.

- Eric

On Wed, Jul 15, 2015 at 3:26 PM Alan Somers <asomers at freebsd.org> wrote:

> 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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