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 d833d02..1278098 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1664,6 +1664,9 @@
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;