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>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d833d02b321f239b840266f739a6a878eb47cacf..1278098624e6382ab77522c68535d39b3c863916 100644 (file)
--- 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;