Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru> writes:
> We need it for further blockdev-replace functionality.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@yandex-team.ru>
> ---
> block/export/export.c | 18 ++++++++++++++++++
> include/sysemu/block-backend-global-state.h | 1 +
> 2 files changed, 19 insertions(+)
>
> diff --git a/block/export/export.c b/block/export/export.c
> index 6d51ae8ed7..57beae7982 100644
> --- a/block/export/export.c
> +++ b/block/export/export.c
> @@ -355,3 +355,21 @@ BlockExportInfoList *qmp_query_block_exports(Error
> **errp)
>
> return head;
> }
> +
> +BlockBackend *blk_by_export_id(const char *id, Error **errp)
> +{
> + BlockExport *exp;
> +
> + exp = blk_exp_find(id);
> + if (exp == NULL) {
> + error_setg(errp, "Export '%s' not found", id);
> + return NULL;
> + }
> +
> + if (!exp->blk) {
> + error_setg(errp, "Export '%s' is empty", id);
Can this happen?
> + return NULL;
> + }
> +
> + return exp->blk;
> +}
> diff --git a/include/sysemu/block-backend-global-state.h
> b/include/sysemu/block-backend-global-state.h
> index ccb35546a1..410d0cc5c7 100644
> --- a/include/sysemu/block-backend-global-state.h
> +++ b/include/sysemu/block-backend-global-state.h
> @@ -74,6 +74,7 @@ void blk_detach_dev(BlockBackend *blk, DeviceState *dev);
> DeviceState *blk_get_attached_dev(BlockBackend *blk);
> BlockBackend *blk_by_dev(void *dev);
> BlockBackend *blk_by_qdev_id(const char *id, Error **errp);
> +BlockBackend *blk_by_export_id(const char *id, Error **errp);
> void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void
> *opaque);
>
> void blk_activate(BlockBackend *blk, Error **errp);
