[Qemu-devel] [PATCH v3 04/19] block: update bs->total_sectors on writes

[Paolo Bonzini]

If a BlockDriverState is growable, after every write we need to
check if bs->total_sectors might have changed.

Signed-off-by: Paolo Bonzini <address@hidden>
---
 block.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/block.c b/block.c
index 6cd39fa..ebac2fa 100644
--- a/block.c
+++ b/block.c
@@ -2651,6 +2651,9 @@ static int coroutine_fn 
bdrv_co_do_writev(BlockDriverState *bs,
     if (bs->wr_highest_sector < sector_num + nb_sectors - 1) {
         bs->wr_highest_sector = sector_num + nb_sectors - 1;
     }
+    if (bs->growable && ret >= 0) {
+        bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors);
+    }
 
     tracked_request_end(&req);
 
-- 
1.8.3.1