===================================================================
@@ -504,6 +504,16 @@ static int virtio_blk_load(QEMUFile *f,
return 0;
}
+static void virtio_blk_change_cb(void *opaque)
+{
+ VirtIOBlock *s = opaque;
+
+ if (s->bs->size_changed) {
+ virtio_notify_config(&s->vdev);
+ s->bs->size_changed = 0;
+ }
+}
+
VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf)
{
VirtIOBlock *s;
@@ -546,6 +556,7 @@ VirtIODevice *virtio_blk_init(DeviceStat
register_savevm(dev, "virtio-blk", virtio_blk_id++, 2,
virtio_blk_save, virtio_blk_load, s);
bdrv_set_removable(s->bs, 0);
+ bdrv_set_change_cb(s->bs, virtio_blk_change_cb, s);
s->bs->buffer_alignment = conf->logical_block_size;
add_boot_device_path(conf->bootindex, dev, "/disk@0,0");
Raise a config change interrupt when the size changed. This allows virtio-blk guest drivers to read-read the information from the config space once it got the config chaged interrupt. Signed-off-by: Christoph Hellwig <hch@lst.de>