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[Qemu-block] [PATCH v9 1/9] mirror: inherit supported write/zero flags
From: |
Anton Nefedov |
Subject: |
[Qemu-block] [PATCH v9 1/9] mirror: inherit supported write/zero flags |
Date: |
Tue, 8 May 2018 17:58:08 +0300 |
Signed-off-by: Anton Nefedov <address@hidden>
Reviewed-by: Alberto Garcia <address@hidden>
---
block/mirror.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/block/mirror.c b/block/mirror.c
index 820f512..a22ddef 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1098,6 +1098,15 @@ static BlockDriver bdrv_mirror_top = {
.bdrv_child_perm = bdrv_mirror_top_child_perm,
};
+static void mirror_top_set_supported_flags(BlockDriverState *bs)
+{
+ bs->supported_write_flags = BDRV_REQ_FUA &
+ bs->backing->bs->supported_write_flags;
+ bs->supported_zero_flags =
+ (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+ bs->backing->bs->supported_zero_flags;
+}
+
static void mirror_start_job(const char *job_id, BlockDriverState *bs,
int creation_flags, BlockDriverState *target,
const char *replaces, int64_t speed,
@@ -1163,6 +1172,8 @@ static void mirror_start_job(const char *job_id,
BlockDriverState *bs,
return;
}
+ mirror_top_set_supported_flags(mirror_top_bs);
+
/* Make sure that the source is not resized while the job is running */
s = block_job_create(job_id, driver, NULL, mirror_top_bs,
BLK_PERM_CONSISTENT_READ,
--
2.7.4
- [Qemu-block] [PATCH v9 0/9] qcow2: cluster space preallocation, Anton Nefedov, 2018/05/08
- [Qemu-block] [PATCH v9 1/9] mirror: inherit supported write/zero flags,
Anton Nefedov <=
- [Qemu-block] [PATCH v9 2/9] blkverify: set supported write/zero flags, Anton Nefedov, 2018/05/08
- [Qemu-block] [PATCH v9 5/9] block: treat BDRV_REQ_ALLOCATE as serialising, Anton Nefedov, 2018/05/08
- [Qemu-block] [PATCH v9 7/9] block: support BDRV_REQ_ALLOCATE in passthrough drivers, Anton Nefedov, 2018/05/08
- [Qemu-block] [PATCH v9 3/9] quorum: set supported write/zero flags, Anton Nefedov, 2018/05/08
- [Qemu-block] [PATCH v9 6/9] file-posix: support BDRV_REQ_ALLOCATE, Anton Nefedov, 2018/05/08