blkdebug: pass getlength to underlying file

This is required when using blkdebug with raw format.  Unlike qcow2/QED,
raw asks blkdebug for the length of the file, it doesn't get it from
a header.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/block/blkdebug.c b/block/blkdebug.c
index 1f79ef2a00794f8f627c8009051f47793b772315..b084a232cfa484de4b59428d9593d0ca83dcdfd9 100644 (file)
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -429,6 +429,11 @@ static void blkdebug_debug_event(BlockDriverState *bs, BlkDebugEvent event)
     }
 }
 
+static int64_t blkdebug_getlength(BlockDriverState *bs)
+{
+    return bdrv_getlength(bs->file);
+}
+
 static BlockDriver bdrv_blkdebug = {
     .format_name        = "blkdebug",
     .protocol_name      = "blkdebug",
@@ -437,6 +442,7 @@ static BlockDriver bdrv_blkdebug = {
 
     .bdrv_file_open     = blkdebug_open,
     .bdrv_close         = blkdebug_close,
+    .bdrv_getlength     = blkdebug_getlength,
 
     .bdrv_aio_readv     = blkdebug_aio_readv,
     .bdrv_aio_writev    = blkdebug_aio_writev,