• Peter Jones's avatar
    dm ioctl: allow rename to fill empty uuid · 84c89557
    Peter Jones authored
    Allow the uuid of a mapped device to be set after device creation.
    Previously the uuid (which is optional) could only be set by
    DM_DEV_CREATE.  If no uuid was supplied it could not be set later.
    
    Sometimes it's necessary to create the device before the uuid is known,
    and in such cases the uuid must be filled in after the creation.
    
    This patch extends DM_DEV_RENAME to accept a uuid accompanied by
    a new flag DM_UUID_FLAG.  This can only be done once and if no
    uuid was previously supplied.  It cannot be used to change an
    existing uuid.
    
    DM_VERSION_MINOR is also bumped to 19 to indicate this interface
    extension is available.
    Signed-off-by: default avatarPeter Jones <pjones@redhat.com>
    Signed-off-by: default avatarJonathan Brassow <jbrassow@redhat.com>
    Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
    84c89557
dm-ioctl.h 9.54 KB