Re: include/linux/xattr.h: how much userpace visible?

[H. Peter Anvin]

David Miller wrote:
> > >
> > However, it would be better if the ABI constants were exported, or at 
> > least *exportable* (using a __KERNEL_XATTR_MACROS test macro or 
> > something like that.)
>
> This is the same situation as the socket.h issue we're trying
> to figure out what to do about.
>
> wrt. the socket.h case I think I'm going to revert the guilty
> changeset for now until a better scheme is implemented

Indeed it is (as well as <linux/stat.h>).

I believe the use of feature macros is probably the way to go; that way 
userspace can request subsets, which can vary from libc to libc.

There is, of course, the "ABI language" variant, but I don't see that 
happening unless someone has a lot of time to spend on it.

	-hpa
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