virtio-blk: Call revalidate_disk() upon online disk resize

If a virtio disk is open in guest and a disk resize operation is done,
(virsh blockresize), new size is not visible to tools like "fdisk -l".
This seems to be happening as we update only part->nr_sects and not
bdev->bd_inode size.

Call revalidate_disk() which should take care of it. I tested growing disk
size of already open disk and it works for me.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index c4a60badf252caee7bffff38cc0cf115d0bd81a4..0e4ef3de9d5deb6fab10c5ef0fb5678ec610a3be 100644 (file)
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -351,6 +351,7 @@ static void virtblk_config_changed_work(struct work_struct *work)
                  cap_str_10, cap_str_2);
 
        set_capacity(vblk->disk, capacity);
+       revalidate_disk(vblk->disk);
 done:
        mutex_unlock(&vblk->config_lock);
 }