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block drivers: add discard/write_zeroes properties to bdrv_get_info implementation

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-11-22 13:39:50 +01:00 committed by Stefan Hajnoczi
parent 97b00e2851
commit 95de6d7078
5 changed files with 9 additions and 0 deletions
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2
block/qcow2.c
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@ -1893,6 +1893,8 @@ static coroutine_fn int qcow2_co_flush_to_os(BlockDriverState *bs)
static int qcow2_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcowState *s = bs->opaque;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = (s->qcow_version >= 3);
bdi->cluster_size = s->cluster_size;
bdi->vm_state_offset = qcow2_vm_state_offset(s);
return 0;

2
block/qed.c
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@ -1475,6 +1475,8 @@ static int bdrv_qed_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
memset(bdi, 0, sizeof(*bdi));
bdi->cluster_size = s->header.cluster_size;
bdi->is_dirty = s->header.features & QED_F_NEED_CHECK;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = true;
return 0;
}

1
block/vdi.c
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@ -331,6 +331,7 @@ static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
logout("\n");
bdi->cluster_size = s->block_size;
bdi->vm_state_offset = 0;
bdi->unallocated_blocks_are_zero = true;
return 0;
}

3
block/vhdx.c
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@ -1049,6 +1049,9 @@ static int vhdx_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
bdi->cluster_size = s->block_size;
bdi->unallocated_blocks_are_zero =
(s->params.data_bits & VHDX_PARAMS_HAS_PARENT) == 0;
return 0;
}

1
block/vpc.c
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@ -464,6 +464,7 @@ static int vpc_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
bdi->cluster_size = s->block_size;
}
bdi->unallocated_blocks_are_zero = true;
return 0;
}