[brussels-dev] Brussels: NDD compatiblity support [PSARC/2008/171 FastTrack timeout 03/11/2008]

[Peter Memishian]

 > There is a lager issue here: should user space apps that issue the
 > DLDIOC*PROP ioctls need mac.h to get the property numbers, or
 > should drivers include dld.h? 

I don't see an issue with user-space making use of <sys/mac.h> -- it'll
ultimately be a public part of the GLDv3 API.  On the other hand, having
e.g. third-party GLDv3 drivers pulling in an implementation detail like
<sys/dld.h> is a problem.  (Note that user-space apps are otherwise
insulated from the DLD namespace since e.g. DLDIOC*PROP is actually issued
by libdladm on behalf of userland.)

 > > What happens if the name passed in is already a canonical ndd
 > > property?  Is it just silently ignored?
 > 
 > It would be ignored.

I presume the same would be true if it attempted to register a framework
link property name like "autopush"?  If so, that seems dangerous since
namespace collisions that may be introduced over time (e.g., as we grow
the set of framework-native link properties) will go unreported, which may
lead to unpredictable behavior.

-- 
meem