Commit b35b2bba authored by Miroslav Rezanina's avatar Miroslav Rezanina Committed by Kevin Wolf
Browse files

block: Add synchronous wrapper for bdrv_co_is_allocated_above

There's no synchronous wrapper for bdrv_co_is_allocated_above function
so it's not possible to check for sector allocation in an image with
a backing file.
Signed-off-by: default avatarMiroslav Rezanina <>
Reviewed-by: default avatarKevin Wolf <>
Signed-off-by: default avatarStefan Hajnoczi <>
parent 7d81c141
......@@ -2681,6 +2681,7 @@ int bdrv_has_zero_init(BlockDriverState *bs)
typedef struct BdrvCoIsAllocatedData {
BlockDriverState *bs;
BlockDriverState *base;
int64_t sector_num;
int nb_sectors;
int *pnum;
......@@ -2813,6 +2814,44 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
return 0;
/* Coroutine wrapper for bdrv_is_allocated_above() */
static void coroutine_fn bdrv_is_allocated_above_co_entry(void *opaque)
BdrvCoIsAllocatedData *data = opaque;
BlockDriverState *top = data->bs;
BlockDriverState *base = data->base;
data->ret = bdrv_co_is_allocated_above(top, base, data->sector_num,
data->nb_sectors, data->pnum);
data->done = true;
* Synchronous wrapper around bdrv_co_is_allocated_above().
* See bdrv_co_is_allocated_above() for details.
int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
int64_t sector_num, int nb_sectors, int *pnum)
Coroutine *co;
BdrvCoIsAllocatedData data = {
.bs = top,
.base = base,
.sector_num = sector_num,
.nb_sectors = nb_sectors,
.pnum = pnum,
.done = false,
co = qemu_coroutine_create(bdrv_is_allocated_above_co_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
return data.ret;
BlockInfo *bdrv_query_info(BlockDriverState *bs)
BlockInfo *info = g_malloc0(sizeof(*info));
......@@ -280,6 +280,8 @@ int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
int bdrv_has_zero_init(BlockDriverState *bs);
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int *pnum);
int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
int64_t sector_num, int nb_sectors, int *pnum);
void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
BlockdevOnError on_write_error);
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