From 724134432ef21f1fb2b18bbe55b891d31181ccca Mon Sep 17 00:00:00 2001
From: Jinhua Cao <caojinhua1@huawei.com>
Date: Fri, 11 Feb 2022 14:25:39 +0800
Subject: [PATCH] qemu-img: block: dont blk_make_zero if discard_zeroes false
Signed-off-by: Jinhua Cao <caojinhua1@huawei.com>
---
block/file-posix.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index b283093e5b..aed7529f44 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -804,7 +804,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
}
#endif
- bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK;
+ bs->supported_zero_flags = s->discard_zeroes ? (BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) : 0;
if (S_ISREG(st.st_mode)) {
/* When extending regular files, we get zeros from the OS */
bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE;
--
2.27.0