[OpenAFS] check in c (linux) whether a directory entry is a mount point for an AFS volume

[David Howells]

With kAFS, you can do this:

	[root@andromeda ~]# getfattr /kafs/.procyon.org.uk -d --match ".*"
	getfattr: Removing leading '/' from absolute path names
	# file: kafs/.procyon.org.uk
	afs.cell="procyon.org.uk"
	afs.fid="100005:1:1"
	afs.volume="root.cell"

could that be added to OpenAFS also?

Also, you can use statx(2) to find out if the target path is an automount
point (struct statx::stx_attributes & STATX_ATTR_AUTOMOUNT) under kAFS.
OpenAFS could set the bit to indicate that this is a mountpoint, even though
it doesn't actually use the Linux kernel d_automount function.

David