blkg_conf_open_bdev
ret = blkg_conf_open_bdev(ctx);
ret = blkg_conf_open_bdev(ctx);
int blkg_conf_open_bdev(struct blkg_conf_ctx *ctx);
ret = blkg_conf_open_bdev(&ctx);
ret = blkg_conf_open_bdev(&ctx);
ret = blkg_conf_open_bdev(&ctx);
ret = blkg_conf_open_bdev(&ctx);