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[PATCH v7 03/47] block: bdrv_cow_child() for bdrv_has_zero_init()
From: |
Max Reitz |
Subject: |
[PATCH v7 03/47] block: bdrv_cow_child() for bdrv_has_zero_init() |
Date: |
Thu, 25 Jun 2020 17:21:31 +0200 |
bdrv_has_zero_init() and the related bdrv_unallocated_blocks_are_zero()
should use bdrv_cow_child() if they want to check whether the given BDS
has a COW backing file.
Signed-off-by: Max Reitz <mreitz@redhat.com>
---
block.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block.c b/block.c
index 0a0b855261..f3e2aae49c 100644
--- a/block.c
+++ b/block.c
@@ -5394,7 +5394,7 @@ int bdrv_has_zero_init(BlockDriverState *bs)
/* If BS is a copy on write image, it is initialized to
the contents of the base image, which may not be zeroes. */
- if (bs->backing) {
+ if (bdrv_cow_child(bs)) {
return 0;
}
if (bs->drv->bdrv_has_zero_init) {
@@ -5412,7 +5412,7 @@ bool bdrv_unallocated_blocks_are_zero(BlockDriverState
*bs)
{
BlockDriverInfo bdi;
- if (bs->backing) {
+ if (bdrv_cow_child(bs)) {
return false;
}
--
2.26.2
- [PATCH v7 00/47] block: Deal with filters, Max Reitz, 2020/06/25
- [PATCH v7 01/47] block: Add child access functions, Max Reitz, 2020/06/25
- [PATCH v7 03/47] block: bdrv_cow_child() for bdrv_has_zero_init(),
Max Reitz <=
- [PATCH v7 02/47] block: Add chain helper functions, Max Reitz, 2020/06/25
- [PATCH v7 04/47] block: bdrv_set_backing_hd() is about bs->backing, Max Reitz, 2020/06/25
- [PATCH v7 05/47] block: Include filters when freezing backing chain, Max Reitz, 2020/06/25
- [PATCH v7 06/47] block: Drop bdrv_is_encrypted(), Max Reitz, 2020/06/25
- [PATCH v7 07/47] block: Add bdrv_supports_compressed_writes(), Max Reitz, 2020/06/25
- [PATCH v7 08/47] throttle: Support compressed writes, Max Reitz, 2020/06/25
- [PATCH v7 09/47] copy-on-read: Support compressed writes, Max Reitz, 2020/06/25
- [PATCH v7 11/47] backup-top: Support compressed writes, Max Reitz, 2020/06/25
- [PATCH v7 12/47] block: Use bdrv_filter_(bs|child) where obvious, Max Reitz, 2020/06/25
- [PATCH v7 15/47] block: Use CAFs when working with backing chains, Max Reitz, 2020/06/25