block: tell drivers about an image resize

Extend the change_cb callback with a reason argument, and use it
to tell drivers about size changes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/hw/sd.c b/hw/sd.c
index 601545b2d9..789ca84785 100644
--- a/hw/sd.c
+++ b/hw/sd.c
@@ -422,9 +422,14 @@ static void sd_reset(SDState *sd, BlockDriverState *bdrv)
     sd->pwd_len = 0;
 }
 
-static void sd_cardchange(void *opaque)
+static void sd_cardchange(void *opaque, int reason)
 {
     SDState *sd = opaque;
+
+    if (!(reason & CHANGE_MEDIA)) {
+        return;
+    }
+
     qemu_set_irq(sd->inserted_cb, bdrv_is_inserted(sd->bdrv));
     if (bdrv_is_inserted(sd->bdrv)) {
         sd_reset(sd, sd->bdrv);