Re: [RFC PATCH] vfs: syscalls: Add create_automount() and remove_automount()

From: Linus Torvalds
Date: Wed Feb 19 2020 - 14:07:53 EST

On Wed, Feb 19, 2020 at 10:55 AM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> Why don't you just use mkdir with S_ISVTX set, or something like that?

Actually, since this is apparently a different filetype, the _logical_
thing to do is to use "mknod()".

Yes, yes, it will require a new case (and maybe a per-filesystem
callback or a flag or something) in "may_mknod()" and "do_mknodat()"
to let those new kinds through, but it sounds like mknod() is actually
what you're doing.

You presumably need a new type _anyway_ for stat() and/or the filldir
d_type field. Or do you always want to make it look exactly like a
directory to all user space?