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, 5 insertions, 1 deletions

diff --git a/hw/ide/core.c b/hw/ide/core.c
index e698c13..dd63664 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -1584,11 +1584,15 @@ static void ide_cfata_metadata_write(IDEState *s)
 }
 
 /* called when the inserted state of the media has changed */
-static void cdrom_change_cb(void *opaque)
+static void cdrom_change_cb(void *opaque, int reason)
 {
     IDEState *s = opaque;
     uint64_t nb_sectors;
 
+    if (!(reason & CHANGE_MEDIA)) {
+        return;
+    }
+
     bdrv_get_geometry(s->bs, &nb_sectors);
     s->nb_sectors = nb_sectors;