[Qemu-devel] [PATCH 5/5] block: add bdrv_copy_header()

[Devin Nakamura <devin122@gmail.com>]

Signed-off-by: Devin Nakamura <devin122@gmail.com>
---
 block.c |   10 ++++++++++
 block.h |    2 ++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/block.c b/block.c
index c9ea201..c6c36e7 100644
--- a/block.c
+++ b/block.c
@@ -3061,3 +3061,13 @@ int bdrv_map(BlockDriverState *bs, uint64_t *guest_offset,
     return drv->bdrv_map(bs, guest_offset, host_offset,
         contiguous_bytes);
 }
+
+int bdrv_copy_header(BlockDriverState *bs)
+{
+    BlockDriver *drv = bs->drv;
+    if (!drv)
+        return -ENOMEDIUM;
+    if (!drv->bdrv_copy_header)
+        return -ENOTSUP;
+    return drv->bdrv_copy_header(bs);
+}
diff --git a/block.h b/block.h
index ed21ead..0583875 100644
--- a/block.h
+++ b/block.h
@@ -256,6 +256,8 @@ int bdrv_get_mapping(BlockDriverState *bs, uint64_t *guest_offset,
                      uint64_t *host_offset, uint64_t *contiguous_bytes);
 int bdrv_map(BlockDriverState *bs, uint64_t *guest_offset,
              uint64_t *host_offset, uint64_t *contiguous_bytes);
+int bdrv_copy_header(BlockDriverState *bs);
+
 typedef enum {
     BLKDBG_L1_UPDATE,
 
-- 
1.7.6.rc1