diff options
| -rw-r--r-- | block.c | 37 | ||||
| -rw-r--r-- | block_int.h | 2 |
2 files changed, 39 insertions, 0 deletions
@@ -1887,6 +1887,26 @@ int bdrv_has_zero_init(BlockDriverState *bs) return 1; } +typedef struct BdrvCoIsAllocatedData { + BlockDriverState *bs; + int64_t sector_num; + int nb_sectors; + int *pnum; + int ret; + bool done; +} BdrvCoIsAllocatedData; + +/* Coroutine wrapper for bdrv_is_allocated() */ +static void coroutine_fn bdrv_is_allocated_co_entry(void *opaque) +{ + BdrvCoIsAllocatedData *data = opaque; + BlockDriverState *bs = data->bs; + + data->ret = bs->drv->bdrv_co_is_allocated(bs, data->sector_num, + data->nb_sectors, data->pnum); + data->done = true; +} + /* * Returns true iff the specified sector is present in the disk image. Drivers * not implementing the functionality are assumed to not support backing files, @@ -1902,6 +1922,23 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum) { int64_t n; + if (bs->drv->bdrv_co_is_allocated) { + Coroutine *co; + BdrvCoIsAllocatedData data = { + .bs = bs, + .sector_num = sector_num, + .nb_sectors = nb_sectors, + .pnum = pnum, + .done = false, + }; + + co = qemu_coroutine_create(bdrv_is_allocated_co_entry); + qemu_coroutine_enter(co, &data); + while (!data.done) { + qemu_aio_wait(); + } + return data.ret; + } if (!bs->drv->bdrv_is_allocated) { if (sector_num >= bs->total_sectors) { *pnum = 0; diff --git a/block_int.h b/block_int.h index e2799e4f6b..d5b5457d90 100644 --- a/block_int.h +++ b/block_int.h @@ -103,6 +103,8 @@ struct BlockDriver { int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); int coroutine_fn (*bdrv_co_discard)(BlockDriverState *bs, int64_t sector_num, int nb_sectors); + int coroutine_fn (*bdrv_co_is_allocated)(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, int *pnum); /* * Invalidate any cached meta-data. |