diff --git a/qemu-img-block-dont-blk_make_zero-if-discard_zeroes-.patch b/qemu-img-block-dont-blk_make_zero-if-discard_zeroes-.patch new file mode 100644 index 0000000..c96e5b4 --- /dev/null +++ b/qemu-img-block-dont-blk_make_zero-if-discard_zeroes-.patch @@ -0,0 +1,26 @@ +From 724134432ef21f1fb2b18bbe55b891d31181ccca Mon Sep 17 00:00:00 2001 +From: Jinhua Cao +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 +--- + 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 +