Struct SnapshotDescription 

pub struct SnapshotDescription {

    pub state_path: PathBuf,
    pub magic: u64,
    pub version: Version,
    pub expected_version: Version,
    pub vcpu_count: usize,
    pub mem_size_mib: u64,
    pub track_dirty_pages: bool,
    pub devices: Vec<(String, String, u32)>,
    pub mmds_present: bool,
    pub inferred_memory_path: Option<PathBuf>,
    pub inferred_memory_exists: bool,
    pub inferred_memory_size: Option<u64>,
    pub crc_ok: bool,
}

What --describe-snapshot prints. Captures the same fields a Firecracker user would expect:

• file path
• magic + version
• vCPU count
• mem_size_mib
• dirty-page tracking flag
• whether the matching memory file looks present

Fields

state_path: PathBuf

Path to the state file.

magic: u64

Magic value embedded in the file.

version: Version

Version embedded in the file.

expected_version: Version

Squib’s expected version (for the cross-version note).

vcpu_count: usize

Number of vCPUs the snapshot saved.

mem_size_mib: u64

Configured guest RAM size in MiB.

track_dirty_pages: bool

Whether dirty-page tracking was enabled at save time.

devices: Vec<(String, String, u32)>

Per-device summary: (class, id, mmio_slot).

mmds_present: bool

Whether MMDS state is present.

inferred_memory_path: Option<PathBuf>

Best-effort memory-file path inferred by swapping .snap→.mem.

inferred_memory_exists: bool

Whether that inferred memory file exists.

inferred_memory_size: Option<u64>

Inferred memory file’s size in bytes (if present).

crc_ok: bool

CRC verified on load.

Implementations

impl SnapshotDescription

pub fn to_json(&self) -> Value

Convert to a serde_json::Value for machine consumption.

pub fn human(&self) -> String

Format a human-readable summary suitable for --describe-snapshot stdout.

Trait Implementations

impl Clone for SnapshotDescription

fn clone(&self) -> SnapshotDescription

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SnapshotDescription

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.