Struct ResourceUpdate 

pub struct ResourceUpdate {
    pub vcpus: Option<u32>,
    pub memory_mb: Option<u32>,
    pub limits: ResourceLimits,
}

A resource update request.

Fields set to None are left unchanged.

Fields

vcpus: Option<u32>

vCPU count change (Tier 1 — will be rejected).

memory_mb: Option<u32>

Memory in MiB change (Tier 1 — will be rejected).

limits: ResourceLimits

Cgroup-based limits (Tier 2 — applied via exec).

Implementations

impl ResourceUpdate

pub fn has_tier1_changes(&self) -> bool

Check if any Tier 1 (immutable) fields are requested.

pub fn has_tier2_changes(&self) -> bool

Check if any Tier 2 (cgroup) fields are requested.

pub fn build_cgroup_commands(&self) -> Vec<String>

Build shell commands to apply Tier 2 cgroup changes inside the guest.

Returns one sh command per cgroup v2 control file. The resize exec runs in the guest ROOT cgroup, so each command resolves the per-container cgroup slice (box-<pid>-<seq>, joined by the container at spawn) at runtime and writes there — a bare /sys/fs/cgroup/<file> write would hit the root cgroup and silently leave the container’s limits unchanged.

Trait Implementations

impl Clone for ResourceUpdate

fn clone(&self) -> ResourceUpdate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResourceUpdate

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

Formats the value using the given formatter.

impl Default for ResourceUpdate

fn default() -> ResourceUpdate

Returns the “default value” for a type.