• Mateusz Guzik's avatar
    buffer.c: call thaw_super during emergency thaw · 08fdc8a0
    Mateusz Guzik authored
    There are 2 distinct freezing mechanisms - one operates on block
    devices and another one directly on super blocks. Both end up with the
    same result, but thaw of only one of these does not thaw the other.
    In particular fsfreeze --freeze uses the ioctl variant going to the
    super block. Since prior to this patch emergency thaw was not doing
    a relevant thaw, filesystems frozen with this method remained
    The patch is a hack which adds blind unfreezing.
    In order to keep the super block write-locked the whole time the code
    is shuffled around and the newly introduced __iterate_supers is
    Signed-off-by: default avatarMateusz Guzik <mguzik@redhat.com>
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
super.c 39.8 KB