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[Qemu-block] [PATCH v5 07/42] block: *filtered_cow_child() for *has_zero
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From: |
Max Reitz |
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Subject: |
[Qemu-block] [PATCH v5 07/42] block: *filtered_cow_child() for *has_zero_init() |
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Date: |
Thu, 13 Jun 2019 00:09:29 +0200 |
bdrv_has_zero_init() and the related bdrv_unallocated_blocks_are_zero()
should use bdrv_filtered_cow_child() if they want to check whether the
given BDS has a COW backing file.
Signed-off-by: Max Reitz <address@hidden>
---
block.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block.c b/block.c
index be18130944..64d6190984 100644
--- a/block.c
+++ b/block.c
@@ -4933,7 +4933,7 @@ 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_filtered_cow_child(bs)) {
return 0;
}
if (bs->drv->bdrv_has_zero_init) {
@@ -4951,7 +4951,7 @@ bool bdrv_unallocated_blocks_are_zero(BlockDriverState
*bs)
{
BlockDriverInfo bdi;
- if (bs->backing) {
+ if (bdrv_filtered_cow_child(bs)) {
return false;
}
--
2.21.0
- [Qemu-block] [PATCH v5 04/42] block: Add child access functions, (continued)
- [Qemu-block] [PATCH v5 06/42] qcow2: Implement .bdrv_storage_child(), Max Reitz, 2019/06/12
- [Qemu-block] [PATCH v5 08/42] block: bdrv_set_backing_hd() is about bs->backing, Max Reitz, 2019/06/12
- [Qemu-block] [PATCH v5 07/42] block: *filtered_cow_child() for *has_zero_init(),
Max Reitz <=
- [Qemu-block] [PATCH v5 10/42] block: Use CAF in bdrv_is_encrypted(), Max Reitz, 2019/06/12
- [Qemu-block] [PATCH v5 11/42] block: Add bdrv_supports_compressed_writes(), Max Reitz, 2019/06/12
- [Qemu-block] [PATCH v5 09/42] block: Include filters when freezing backing chain, Max Reitz, 2019/06/12