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    SubjectRe: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13]
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    On Tue, 2006-09-05 at 10:57 +0100, David Howells wrote:
    > Trond Myklebust <trond.myklebust@fys.uio.no> wrote:
    >
    > > Why the hell is it doing a mkdir in the first place?
    >
    > I think the problems it is solving are these:
    >
    > (1) What happens if "/" is _not_ exported?
    >
    > (2) What happens if some intermediate directory (say "/usr") is not
    > accessible?
    >
    >
    > In the first case, the automounter just makes "usr" and "usr/src", say, in the
    > autofs filesystem, and then mounts server:/usr/src on that.

    That is fine. As long as it is doing so in the _autofs_ filesystem. A
    call to 'stat()' should suffice to tell if this is the case.

    > In the second case, the automounter relies on NFS letting it make intervening
    > directories it couldn't otherwise access to span the gap between "/" and
    > "src".

    If the directory isn't accessible, then autofs shouldn't be trying to
    override that. It certainly shouldn't be doing so by trying to create
    the directory.

    -
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