commit 38cb18f5b71428fb8a3e3759ac8fa21ac70cb1b5
author Max Reitz <mreitz@redhat.com> Mon Oct 26 21:39:07 2015 +0100
committer Kevin Wolf <kwolf@redhat.com> Wed Nov 11 16:22:46 2015 +0100
tree 015d4c3447befe908c51ba2d5794e3c0ecb269aa
parent c69a4dd89989b483b06d765b13e41594c78d32b9

block: Add functions for inheriting a BBRS

In order to open a BDS which inherits a BB's root state,
blk_get_open_flags_from_root_state() is used to inquire the flags to be
passed to bdrv_open(), and blk_apply_root_state() is used to apply the
remaining state after the BDS has been opened.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

include/sysemu/block-backend.h

diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 14a6d32..40e315b 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -167,6 +167,8 @@
 BlockAcctStats *blk_get_stats(BlockBackend *blk);
 BlockBackendRootState *blk_get_root_state(BlockBackend *blk);
 void blk_update_root_state(BlockBackend *blk);
+void blk_apply_root_state(BlockBackend *blk, BlockDriverState *bs);
+int blk_get_open_flags_from_root_state(BlockBackend *blk);
 
 void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
                   BlockCompletionFunc *cb, void *opaque);