block: Split change_cb() into change_media_cb(), resize_cb()

Multiplexing callbacks complicates matters needlessly.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/block.h b/block.h
index a72cfc9..7e3f587 100644
--- a/block.h
+++ b/block.h
@@ -28,8 +28,18 @@ typedef struct QEMUSnapshotInfo {
     uint64_t vm_clock_nsec; /* VM clock relative to boot */
 } QEMUSnapshotInfo;
 
+/* Callbacks for block device models */
 typedef struct BlockDevOps {
-    void (*change_cb)(void *opaque, int reason);
+    /*
+     * Runs when virtual media changed (monitor commands eject, change)
+     * Beware: doesn't run when a host device's physical media
+     * changes.  Sure would be useful if it did.
+     */
+    void (*change_media_cb)(void *opaque);
+    /*
+     * Runs when the size changed (e.g. monitor command block_resize)
+     */
+    void (*resize_cb)(void *opaque);
 } BlockDevOps;
 
 #define BDRV_O_RDWR        0x0002