Method require_single_root

crates/blockdev/src/blockdev.rs:410–419

Walk the parent chain to find all root (whole disk) devices, and fail if more than one root is found. This is a convenience wrapper around `find_all_roots` for callers that expect exactly one backing device (e.g. non-RAID setups).

(&self)

    /// This is a convenience wrapper around `find_all_roots` for callers
    /// that expect exactly one backing device (e.g. non-RAID setups).
    pub fn require_single_root(&self) -> Result<Device> {
        let mut roots = self.find_all_roots()?;
        match roots.len() {
            1 => Ok(roots.remove(0)),
            n => anyhow::bail!(
                "Expected a single root device for {}, but found {n}",
                self.path()
            ),
        }
    }

    /// Walk the parent chain to find all root (whole disk) devices.
    ///