zfs discuss - Nov 2008 - How does zfs handle with ''..'' while snapshotting

Hi,

Let''s say dir a contains  b and c, if I change c to c'',  a
will be a''
based on COW, right?

  a a''
 b c c''

But what will happen if each children of a contains some pointer
pointing back to a, like the
''..'' entry in b. It points to a before the change, which shall
it
point to, a or a'' after the change?

Shall we modify b too? If yes, there will be a new b'', should we do
the same with children of b
recursively? If we leave b untouched,  in the view of a'', after we cd
b, ''..'' will point to a,  that''s
quite confusing.

zfs did it right,  but I can''t find it in the code,  really appreciate
that if someone can give me
some hints.

Thanks

Best Regards
Chenz

-- 
args are passed by ref, but bindings are local, variables are in fact
just a symbol referencing an object