From: Andi Kleen <redacted>
Date: Fri, 19 Mar 2010 18:18:36 +0100

Christoph Lameter [off-list ref] writes:

quoted

I know about the openpgm implementation. Openpbm does this at the user
level and requires linking to a library. It is essentially a communication
protocol done in user space. It has privilege issues because it has to
create PGM packets via a raw socket.

That seems like a poor reason alone to put something into the kernel
Perhaps you rather need some way to have unpriviledged raw sockets?

The classical way to do this is to start suid root, only open
the socket and then drop privileges.

I completely agree.

We should be able to make a way for unprivileged users to
use RAW sockets in some limited capacity, for cases like this.

But I also don't consider what openpbm has to do right now to
be all that much of a restriction.  You need privileges to
add the protocol to the kernel, you need privileges to run
the userspace variant, there is no real difference.