Right now BlockAcctStats is always reside on BlockBackend. This structure
is not used in any other place. Thus we are able to create a converter
from one pointer to another.
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Max Reitz <mreitz@redhat.com>
---
block/block-backend.c | 5 +++++
include/sysemu/block-backend.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/block/block-backend.c b/block/block-backend.c
index 6936b25c83..e77a7e468e 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -2143,6 +2143,11 @@ BlockAcctStats *blk_get_stats(BlockBackend *blk)
return &blk->stats;
}
+BlockBackend *blk_stats2blk(BlockAcctStats *s)
+{
+ return container_of(s, BlockBackend, stats);
+}
+
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque)
{
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 8203d7f6f9..bd4694e7bc 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -227,6 +227,7 @@ void blk_add_insert_bs_notifier(BlockBackend *blk, Notifier
*notify);
void blk_io_plug(BlockBackend *blk);
void blk_io_unplug(BlockBackend *blk);
BlockAcctStats *blk_get_stats(BlockBackend *blk);
+BlockBackend *blk_stats2blk(BlockAcctStats *stats);
BlockBackendRootState *blk_get_root_state(BlockBackend *blk);
void blk_update_root_state(BlockBackend *blk);
bool blk_get_detect_zeroes_from_root_state(BlockBackend *blk);