rbd: handle online resize of underlying rbd image

If we get a notification that the image header has changed, check for
a change in the image size.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d833d02b321f..1278098624e6 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1664,6 +1664,9 @@ static int __rbd_update_snaps(struct rbd_device *rbd_dev)
         if (ret < 0)
                 return ret;
 
+        /* resized? */
+        set_capacity(rbd_dev->disk, h.image_size / 512ULL);
+
         down_write(&rbd_dev->header.snap_rwsem);
 
         snap_seq = rbd_dev->header.snapc->seq;