On Wed, 13 Mar 2013 15:16:28 +0100 Miklos Szeredi <mik...@szeredi.hu> wrote:
> From: Miklos Szeredi <mszer...@suse.cz>
>
> Overlayfs needs a private clone of the mount, so create a function for
> this and export to modules.
>
> ...
>
> +struct vfsmount *clone_private_mount(struct path *path)
> +{
> + struct mount *old_mnt = real_mount(path->mnt);
> + struct mount *new_mnt;
> +
> + if (IS_MNT_UNBINDABLE(old_mnt))
> + return ERR_PTR(-EINVAL);
> +
> + down_read(&namespace_sem);
> + new_mnt = clone_mnt(old_mnt, path->dentry, CL_PRIVATE);
> + up_read(&namespace_sem);
> + if (!new_mnt)
> + return ERR_PTR(-ENOMEM);
> +
> + return &new_mnt->mnt;
> +}
> +EXPORT_SYMBOL_GPL(clone_private_mount);
So this one gets the _GPL?
This is a new, exported-to-modules kernel interface function. And it
is undocumented?
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