Enum MetadataRow 

pub enum MetadataRow {
    Inode {
        inode_id: InodeId,
        inode_kind: InodeKind,
        created_seq: ChangeSeq,
    },
    DirentryBind {
        parent_inode_id: InodeId,
        name_key: NameKey,
        display_name: DisplayName,
        child_inode_id: InodeId,
        bind_seq: ChangeSeq,
        bind_delta_index: u32,
    },
    DirentryUnbind {
        parent_inode_id: InodeId,
        name_key: NameKey,
        display_name: DisplayName,
        child_inode_id: InodeId,
        bind_seq: ChangeSeq,
        bind_delta_index: u32,
        unbind_seq: ChangeSeq,
        unbind_delta_index: u32,
    },
    Revision {
        inode_id: InodeId,
        revision_no: RevisionNo,
        committed_seq: ChangeSeq,
        committed_at_ms: u64,
        revision_delta_index: u32,
        content_ref: ContentRef,
    },
    Tombstone {
        root_inode_id: InodeId,
        tombstone_seq: ChangeSeq,
        tombstone_delta_index: u32,
        action: TombstoneRowAction,
        deleted_at_ms: u64,
        parent_inode_id: Option<InodeId>,
        name_key: Option<NameKey>,
        display_name: Option<DisplayName>,
    },
    ActiveDeletion {
        root_inode_id: InodeId,
        deleted_at_seq: ChangeSeq,
        action: ActiveDeletionRowAction,
    },
    CommitReceipt {
        commit_id: CommitId,
        semantic_commit_fingerprint: String,
        committed_seq: ChangeSeq,
        committed_at_ms: u64,
        message: Option<String>,
    },
}

Stores one materialized metadata event in an SST segment.

See metadata segments.

Variants

Inode

Establishes one inode’s immutable identity and kind.

Fields

inode_id: InodeId

Namespace-scoped inode identity allocated by the publishing writer.

inode_kind: InodeKind

Classification fixed when the inode was created.

created_seq: ChangeSeq

Commit sequence from which the inode can become visible.

DirentryBind

Records one generation of a directory name binding.

Fields

parent_inode_id: InodeId

Directory in which the name was bound.

name_key: NameKey

Policy-derived key used for uniqueness and lookup.

display_name: DisplayName

User-facing component spelling retained for directory responses.

child_inode_id: InodeId

Inode reached while this binding generation remains active.

bind_seq: ChangeSeq

Commit sequence that created this binding generation.

bind_delta_index: u32

Position that disambiguates the binding within bind_seq.

DirentryUnbind

Retires one exact directory-binding generation.

Fields

parent_inode_id: InodeId

Directory that held the targeted binding.

name_key: NameKey

Canonical name key of the targeted binding.

display_name: DisplayName

User-facing spelling the retired binding carried.

child_inode_id: InodeId

Child identity recorded by the targeted binding.

bind_seq: ChangeSeq

Commit sequence that created the binding being retired.

bind_delta_index: u32

Delta position of the binding being retired.

unbind_seq: ChangeSeq

Commit sequence from which this unbind takes effect.

unbind_delta_index: u32

Position that disambiguates the unbind within unbind_seq.

Revision

Publishes one immutable content revision for a file inode.

Fields

inode_id: InodeId

File inode whose history contains the revision.

revision_no: RevisionNo

Monotonic revision number within that file’s history.

committed_seq: ChangeSeq

Namespace sequence that published the revision.

committed_at_ms: u64

The owning commit’s observational wall-clock stamp, denormalized onto the row so revision reads answer times without a receipt join. Never a validity input; committed_seq is the order.

revision_delta_index: u32

Delta position that disambiguates the revision within committed_seq.

content_ref: ContentRef

Immutable bytes published by the revision.

Tombstone

Changes whether one root inode has an active subtree tombstone.

Fields

root_inode_id: InodeId

Inode whose rooted subtree the event governs.

tombstone_seq: ChangeSeq

Commit sequence that published this tombstone event.

tombstone_delta_index: u32

Position that disambiguates the event within tombstone_seq.

action: TombstoneRowAction

What this event did; readers take the newest row per root and treat a revoke newest row as “no active tombstone”.

deleted_at_ms: u64

Wall-clock stamp of the recording commit. Observational, like every committed_at_ms.

parent_inode_id: Option<InodeId>

Directory that held the deleted binding, for set rows from path deletes; tombstone rows are immortal, so this is where a deleted name survives after unbind rows age out.

name_key: Option<NameKey>

Canonical key of the deleted binding, when known.

display_name: Option<DisplayName>

User-facing spelling of the deleted binding, when known.

ActiveDeletion

Names one deletion generation in the derived active-deletions family.

The row is not a new event: the materializer derives it from the tombstone family, adding a listed row for each set and a removed row for each revoke, so the trash listing is a range scan instead of a walk over every deletion the namespace ever recorded.

Fields

root_inode_id: InodeId

Subtree root the deletion covers. With deleted_at_seq this is exactly the handle undelete addresses.

deleted_at_seq: ChangeSeq

Commit sequence of the deletion this row speaks for. A removed row repeats its target’s sequence, not the undelete’s, so the two rows sort together.

action: ActiveDeletionRowAction

Whether the deletion is still recoverable, and the listing detail it carries while it is.

CommitReceipt

Preserves the evidence needed to answer a retried logical commit.

Fields

commit_id: CommitId

Caller idempotency key whose later reuse is checked against this row.

semantic_commit_fingerprint: String

Digest used to distinguish a safe retry from conflicting id reuse.

committed_seq: ChangeSeq

Namespace sequence assigned to the accepted commit.

committed_at_ms: u64

The commit’s observational wall-clock stamp. Receipts are the durable per-commit record once WAL history drops below the retention floor, so the stamp lives here for every commit, revision-bearing or not.

message: Option<String>

Caller annotation preserved for idempotent response reconstruction.

Implementations

impl MetadataRow

pub fn row_key(&self) -> String

Builds this row’s canonical durable key in its primary table family.

See metadata segments.

pub fn row_key_for_family(&self, family: MetadataTableFamily) -> String

Builds this row’s durable key using the selected primary or secondary ordering.

See metadata segments.

pub fn filter_key_for_family(&self, family: MetadataTableFamily) -> String

The exact lookup prefix a point read probes for this row in family, and therefore the key inserted into the segment’s bloom filter. The two sides must agree byte-for-byte — a filter is an exact-match structure — so both are defined here, next to the row keys they shorten. Range scans at coarser granularity (a whole directory, a wave of names) do not consult filters.

Trait Implementations

impl Clone for MetadataRow

fn clone(&self) -> MetadataRow

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetadataRow

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MetadataRow

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for MetadataRow

impl PartialEq for MetadataRow

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MetadataRow

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 MetadataRow