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    SubjectRe: [PATCH] UBIFS: fill f_fsid
    On Tue, Sep 02, 2008 at 11:09:54AM -0600, Andreas Dilger wrote:
    > The fsid is supposed to be a persistent, unique identifier for the
    > filesystem, used by NFS in file handles. Using st_dev is unsafe,
    > because that may change from one server boot to the next, because
    > of device probing order, driver changes, etc. Also, not all filesystems
    > HAVE a valid st_dev in the first place, which is the whole reason
    > for this thread.
    > I think a ->get_fsid() export method would be preferable.

    Umm, different things. f_fsid in stat(v)fs is just a cookie exported to
    userspac that has never really been documented.

    We also called the filesystem part of the NFS filehandle in a few
    places, and for those it's correct that it should be stable. Currently
    the fsid is either created from the dev_t in kernelspace or from
    uuids extracted through libuuid in userspace.

    I can't see anything in the message that started this thread that
    mentions NFS, btw.

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      Last update: 2008-09-02 23:05    [W:0.019 / U:11.484 seconds]
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