• David Woodhouse's avatar
    [JFFS2] Support new device nodes · aef9ab47
    David Woodhouse authored
    Device node major/minor numbers are just stored in the payload of a single
    data node. Just extend that to 4 bytes and use new_encode_dev() for it.
    We only use the 4-byte format if we _need_ to, if !old_valid_dev(foo).
    This preserves backwards compatibility with older code as much as
    possible. If we do make devices with major or minor numbers above 255, and
    then mount the file system with the old code, it'll just read the first
    two bytes and get the numbers wrong. If it comes to garbage-collect it,
    it'll then write back those wrong numbers. But that's about the best we
    can expect.
    Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>