On 7/22/06, Bodo Eggert <[email protected]> wrote:
Horst H. von Brand <[email protected]> wrote:
> Joshua Hudson <[email protected]> wrote:
>> This patch is the sum total of all that I had to change in the kernel
>> VFS layer to support hard links to directories
>
> Can't be done, as it creates the possibility of loops.
Don't do that then?
Exactly.
> Detecting unconnected subgraphs uses a /lot/ of memory; and much worse, you
> have to stop (almost) all filesystem activity while doing it.
I know.
I just decided the price is worth it.
In my filesystem, any attempt to create a loop of hard links
is detected and cancelled. Unlinking a directory requires it
to be empty if the last link is being removed. "." and ".."
links are counted separately from real links, so that is easy.
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