kib 1add2aab39 Add SIOCGIFDOWNREASON. ...

The ioctl(2) is intended to provide more details about the cause of
the down for the link.

Eventually we might define a comprehensive list of codes for the
situations.  But interface also allows the driver to provide free-form
null-terminated ASCII string to provide arbitrary non-formalized
information.  Sample implementation exists for mlx5(4), where the
string is fetched from firmware controlling the port.

Reviewed by:	hselasky, rrs
Sponsored by:	Mellanox Technologies
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D21527

2020-10-14 10:54:02 -04:00

..

if.h

Add SIOCGIFDOWNREASON.

2020-10-14 10:54:02 -04:00