Index: qemu/block.c
===================================================================
--- qemu.orig/block.c
+++ qemu/block.c
@@ -859,6 +859,60 @@ unlink_and_fail:
     return ret;
 }
 
+int bdrv_reopen_prepare(BlockDriverState *bs, BDRVReopenState **prs, int flags)
+{
+     BlockDriver *drv = bs->drv;
+
+     return drv->bdrv_reopen_prepare(bs, prs, flags);
+}
+
+void bdrv_reopen_commit(BlockDriverState *bs, BDRVReopenState *rs)
+{
+    BlockDriver *drv = bs->drv;
+
+    drv->bdrv_reopen_commit(bs, rs);
+}
+
+void bdrv_reopen_abort(BlockDriverState *bs, BDRVReopenState *rs)
+{
+    BlockDriver *drv = bs->drv;
+
+    drv->bdrv_reopen_abort(bs, rs);
+}
+
+void bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp)
+{
+    BlockDriver *drv = bs->drv;
+    int ret = 0;
+    BDRVReopenState *reopen_state = NULL;
+
+    /* Quiesce IO for the given block device */
+    bdrv_drain_all();
+    ret = bdrv_flush(bs);
+    if (ret != 0) {
+        error_set(errp, QERR_IO_ERROR);
+        return;
+    }
+
+    /* Use driver specific reopen() if available */
+    if (drv->bdrv_reopen_prepare) {
+        ret = bdrv_reopen_prepare(bs, &reopen_state, bdrv_flags);
+         if (ret < 0) {
+            bdrv_reopen_abort(bs, reopen_state);
+            error_set(errp, QERR_OPEN_FILE_FAILED, bs->filename);
+            return;
+        }
+
+        bdrv_reopen_commit(bs, reopen_state);
+        bs->open_flags = bdrv_flags;
+    } else {
+        error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
+                  drv->format_name, bs->device_name,
+                  "reopening of file");
+        return;
+    }
+}
+
 void bdrv_close(BlockDriverState *bs)
 {
     bdrv_flush(bs);
Index: qemu/block_int.h
===================================================================
--- qemu.orig/block_int.h
+++ qemu/block_int.h
@@ -136,6 +136,14 @@ struct BlockDriver {
     int instance_size;
     int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
     int (*bdrv_probe_device)(const char *filename);
+
+    /* For handling image reopen for split or non-split files */
+    int (*bdrv_reopen_prepare)(BlockDriverState *bs,
+                               BDRVReopenState **prs,
+                               int flags);
+    void (*bdrv_reopen_commit)(BlockDriverState *bs, BDRVReopenState *rs);
+    void (*bdrv_reopen_abort)(BlockDriverState *bs, BDRVReopenState *rs);
+
     int (*bdrv_open)(BlockDriverState *bs, int flags);
     int (*bdrv_file_open)(BlockDriverState *bs, const char *filename, int flags);
     int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
@@ -335,6 +343,10 @@ struct BlockDriverState {
     BlockJob *job;
 };
 
+struct BDRVReopenState {
+    BlockDriverState *bs;
+};
+
 int get_tmp_filename(char *filename, int size);
 
 void bdrv_set_io_limits(BlockDriverState *bs,
Index: qemu/block.h
===================================================================
--- qemu.orig/block.h
+++ qemu/block.h
@@ -129,6 +129,10 @@ int bdrv_parse_cache_flags(const char *m
 int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
 int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
               BlockDriver *drv);
+void bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp);
+int bdrv_reopen_prepare(BlockDriverState *bs, BDRVReopenState **prs, int flags);
+void bdrv_reopen_commit(BlockDriverState *bs, BDRVReopenState *rs);
+void bdrv_reopen_abort(BlockDriverState *bs, BDRVReopenState *rs);
 void bdrv_close(BlockDriverState *bs);
 int bdrv_attach_dev(BlockDriverState *bs, void *dev);
 void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev);
Index: qemu/qemu-common.h
===================================================================
--- qemu.orig/qemu-common.h
+++ qemu/qemu-common.h
@@ -223,6 +223,7 @@ typedef struct NICInfo NICInfo;
 typedef struct HCIInfo HCIInfo;
 typedef struct AudioState AudioState;
 typedef struct BlockDriverState BlockDriverState;
+typedef struct BDRVReopenState BDRVReopenState;
 typedef struct DriveInfo DriveInfo;
 typedef struct DisplayState DisplayState;
 typedef struct DisplayChangeListener DisplayChangeListener;