Struct LimitsState 

pub struct LimitsState {
    pub host_ram_mib: u64,
    pub mem_size_mib: Option<u64>,
    pub running_drives: u32,
    pub running_nics: u32,
    pub running_pmem: u32,
}

Cross-field limits that the controller enforces synchronously, before an action is forwarded to the VMM event loop. These are the upper bounds that the per-field Raw* → Validated TryFrom conversions cannot enforce because they need the running machine state (host RAM cap, configured mem_size_mib, running counts).

Per 93-improvements-review.md Phase 2 entry — fix shape “thread BackendCapabilities into the controller, add MachineConfig::validate_against_host(...) invoked at dispatch time before the action reaches the VMM event loop”.

Fields

host_ram_mib: u64

Host RAM (MiB). Defaults to a generous-but-finite value so tests have a fixed upper bound; production builds set this from the live BackendCapabilities.

mem_size_mib: Option<u64>

Most recently configured mem_size_mib. None until the first PUT /machine-config lands.

running_drives: u32

Drives the controller has accepted (≤ MAX_DRIVES = 8).

running_nics: u32

Network interfaces accepted (≤ MAX_NICS = 8).

running_pmem: u32

pmem devices accepted (≤ MAX_PMEM = 4).

Implementations

impl LimitsState

pub fn from_host_ram_mib(host_ram_mib: u64) -> Self

Default limits — host RAM caps generously high so that vanilla unit tests keep passing without injecting a BackendCapabilities mock. Production builds override host_ram_mib from the live HVF BackendCapabilities snapshot.

Trait Implementations

impl Debug for LimitsState

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

Formats the value using the given formatter.

impl Default for LimitsState

fn default() -> Self

Returns the “default value” for a type.