Enum KernelFaultCode 

pub enum KernelFaultCode {
    MalformedEnvelope,
    OperationMismatch,
    ClockRegression,
    InvalidLifecycle,
    InvalidConfig,
    InvalidAuthority,
    ResourceLimitExceeded,
    DuplicateInputConflict,
    UnexpectedEffectOutcome,
    TransactionConflict,
    CheckpointIncompatible,
    CheckpointCorrupted,
    RecordCorrupted,
    CheckpointRequired,
    UnsupportedEffect,
}

Why the kernel refused an input.

Variants

MalformedEnvelope

OperationMismatch

ClockRegression

InvalidLifecycle

InvalidConfig

InvalidAuthority

ResourceLimitExceeded

DuplicateInputConflict

UnexpectedEffectOutcome

A host resolved a pending effect with the success payload of another effect kind, or resolved an effect the kernel is not waiting on.

TransactionConflict

CheckpointIncompatible

CheckpointCorrupted

RecordCorrupted

A durable journal record no longer matches the digest it carries, or the chain it sits in no longer links up.

Deliberately not folded into Self::CheckpointCorrupted: the two have different recovery ladders. A corrupted checkpoint can be answered by falling back to an older checkpoint and replaying more tail; a corrupted record is a journal-integrity failure with nothing to fall back to, because the record chain is the operation’s history.

CheckpointRequired

The only retryable code (GAP-2).

Returned as a Rejected preparation with zero mutation — the input was never accepted. The host takes a checkpoint candidate, installs it and acks it (§12.3), then retries with the same input_id. That retry is a brand-new prepare and must not fall into Self::DuplicateInputConflict.

This code exists to replace the snapshot-overflow latch, whose double consequence — snapshots permanently disabled snapshots and later preparations — was a hard failure on the only durable host and a silent degradation everywhere else.

UnsupportedEffect

The kernel was about to emit an effect whose kind the operation’s host_effect_support declaration does not cover (DEC-8, GAP-6).

Fail-closed before emission: the fault is committed and no effect is published, so the host is never handed an effect it cannot execute. This is the declaration-time half of the pair whose runtime half is HostEffectFailureKind::ProtocolError (DEC-7).

Implementations

impl KernelFaultCode

pub const ALL: [Self; 15]

pub fn as_str(self) -> &'static str

pub fn is_retryable(self) -> bool

Whether re-submitting the same input_id unchanged can succeed. Exactly one code says yes.

Trait Implementations

impl Clone for KernelFaultCode

fn clone(&self) -> KernelFaultCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for KernelFaultCode

impl Debug for KernelFaultCode

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for KernelFaultCode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for KernelFaultCode

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

Formats the value using the given formatter.

impl Eq for KernelFaultCode

impl Hash for KernelFaultCode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for KernelFaultCode

fn cmp(&self, other: &KernelFaultCode) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for KernelFaultCode

fn eq(&self, other: &KernelFaultCode) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for KernelFaultCode

fn partial_cmp(&self, other: &KernelFaultCode) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for KernelFaultCode

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for KernelFaultCode