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-rw-r--r--block/blkdebug.c2
-rw-r--r--block/copy-on-read.c7
-rw-r--r--block/mirror.c3
-rw-r--r--block/raw-format.c2
4 files changed, 7 insertions, 7 deletions
diff --git a/block/blkdebug.c b/block/blkdebug.c
index 1ea835c2b9..efd9441625 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -401,7 +401,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
(BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
- ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+ ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
bs->file->bs->supported_zero_flags);
ret = -EINVAL;
diff --git a/block/copy-on-read.c b/block/copy-on-read.c
index d670fec42b..53972b1da3 100644
--- a/block/copy-on-read.c
+++ b/block/copy-on-read.c
@@ -34,12 +34,11 @@ static int cor_open(BlockDriverState *bs, QDict *options, int flags,
}
bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
- (BDRV_REQ_FUA &
- bs->file->bs->supported_write_flags);
+ (BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
- ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
- bs->file->bs->supported_zero_flags);
+ ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
+ bs->file->bs->supported_zero_flags);
return 0;
}
diff --git a/block/mirror.c b/block/mirror.c
index eb9a4cdf56..ff15cfb197 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1548,7 +1548,8 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
}
mirror_top_bs->total_sectors = bs->total_sectors;
mirror_top_bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED;
- mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED;
+ mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
+ BDRV_REQ_NO_FALLBACK;
bs_opaque = g_new0(MirrorBDSOpaque, 1);
mirror_top_bs->opaque = bs_opaque;
bdrv_set_aio_context(mirror_top_bs, bdrv_get_aio_context(bs));
diff --git a/block/raw-format.c b/block/raw-format.c
index cec29986cc..385cdc2490 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -434,7 +434,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
(BDRV_REQ_FUA & bs->file->bs->supported_write_flags);
bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
- ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
+ ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) &
bs->file->bs->supported_zero_flags);
if (bs->probed && !bdrv_is_read_only(bs)) {