• Mikulas Patocka's avatar
    dm: mark targets that pass integrity data · e2460f2a
    Mikulas Patocka authored
    A dm-crypt on dm-integrity device incorrectly advertises an integrity
    profile on the DM crypt device.  It can be seen in the files
    "/sys/block/dm-*/integrity/*" that both dm-integrity and dm-crypt target
    advertise the integrity profile.  That is incorrect, only the
    dm-integrity target should advertise the integrity profile.
    
    A general problem in DM is that if we have a DM device that depends on
    another device with an integrity profile, the upper device will always
    advertise the integrity profile, even when the target driver doesn't
    support handling integrity data.
    
    Most targets don't support integrity data, so we provide a whitelist of
    targets that support it (linear, delay and striped).  The targets that
    support passing integrity data to the lower device are marked with the
    flag DM_TARGET_PASSES_INTEGRITY.  The DM core will now advertise
    integrity data on a DM device only if all the targets support the
    integrity data.
    Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
    Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
    e2460f2a
dm-delay.c 8.13 KB