From 48c792a802c8cb0ab670ddf92920e2e5e96747a4 Mon Sep 17 00:00:00 2001
From: Jinhua Cao <caojinhua1@huawei.com>
Date: Mon, 18 Mar 2024 10:04:42 +0800
Subject: [PATCH] qemu-img block: set zero flags only when discard_zeros of the
 block supported

zero flags set for block discard_zeros, only when the block support
discard_zeros need set these flags.

old commit info:
    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 01ae5fd88c..4782aba59f 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -822,7 +822,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
 #endif
     s->needs_alignment = raw_needs_alignment(bs);
 
-    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