• Stefan Hajnoczi's avatar
    virtio_blk: fix incorrect message when disk is resized · 1046d304
    Stefan Hajnoczi authored
    The message printed on disk resize is incorrect.  The following is
    printed when resizing to 2 GiB:
    
      $ truncate -s 1G test.img
      $ qemu -device virtio-blk-pci,logical_block_size=4096,...
      (qemu) block_resize drive1 2G
    
      virtio_blk virtio0: new size: 4194304 4096-byte logical blocks (17.2 GB/16.0 GiB)
    
    The virtio_blk capacity config field is in 512-byte sector units
    regardless of logical_block_size as per the VIRTIO specification.
    Therefore the message should read:
    
      virtio_blk virtio0: new size: 524288 4096-byte logical blocks (2.15 GB/2.0 GiB)
    
    Note that this only affects the printed message.  Thankfully the actual
    block device has the correct size because the block layer expects
    capacity in sectors.
    Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
    Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
    1046d304
virtio_blk.c 24 KB