Quoting Christian Brauner (christianvanbrau...@gmail.com):
> static do_bdev_destroy() and bdev_destroy_wrapper() from lxccontainer.c become
> public bdev_destroy() and bdev_destroy_wrapper() in bdev.c and bdev.h
>
> Signed-off-by: Christian Brauner <christianvanbrau...@gmail.com>
Acked-by: Serge E. Hallyn <serge.hal...@ubuntu.com>
> ---
> src/lxc/bdev.c | 37 +++++++++++++++++++++++++++++++++++++
> src/lxc/bdev.h | 3 +++
> 2 files changed, 40 insertions(+)
>
> diff --git a/src/lxc/bdev.c b/src/lxc/bdev.c
> index ada3958..3961f50 100644
> --- a/src/lxc/bdev.c
> +++ b/src/lxc/bdev.c
> @@ -3614,3 +3614,40 @@ bool rootfs_is_blockdev(struct lxc_conf *conf)
> return true;
> return false;
> }
> +
> +bool bdev_destroy(struct lxc_conf *conf)
> +{
> + struct bdev *r;
> + bool ret = false;
> +
> + r = bdev_init(conf, conf->rootfs.path, conf->rootfs.mount, NULL);
> + if (!r)
> + return ret;
> +
> + if (r->ops->destroy(r) == 0)
> + ret = true;
> + bdev_put(r);
> +
> + return ret;
> +}
> +
> +int bdev_destroy_wrapper(void *data)
> +{
> + struct lxc_conf *conf = data;
> +
> + if (setgid(0) < 0) {
> + ERROR("Failed to setgid to 0");
> + return -1;
> + }
> + if (setgroups(0, NULL) < 0)
> + WARN("Failed to clear groups");
> + if (setuid(0) < 0) {
> + ERROR("Failed to setuid to 0");
> + return -1;
> + }
> + if (!bdev_destroy(conf))
> + return -1;
> + else
> + return 0;
> +}
> +
> diff --git a/src/lxc/bdev.h b/src/lxc/bdev.h
> index 428b3b7..f7b3fca 100644
> --- a/src/lxc/bdev.h
> +++ b/src/lxc/bdev.h
> @@ -123,6 +123,9 @@ struct bdev *bdev_copy(struct lxc_container *c0, const
> char *cname,
> struct bdev *bdev_create(const char *dest, const char *type,
> const char *cname, struct bdev_specs *specs);
> void bdev_put(struct bdev *bdev);
> +bool bdev_destroy(struct lxc_conf *conf);
> +/* callback function to be used with userns_exec_1() */
> +int bdev_destroy_wrapper(void *data);
>
> /*
> * these are really for qemu-nbd support, as container shutdown
> --
> 2.5.1
>
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