Module manager_actor 

Ibverbs Manager

Contains ibverbs-specific RDMA logic.

Manages ibverbs resources including:

• Memory registration (CPU and CUDA via dmabuf or segment scanning)
• Queue pair creation and connection establishment
• RDMA domain and protection domain management
• Device selection and PCI-to-RDMA device mapping

Queue-pair lifecycle

Bringing up a queue pair to a peer is a two-sided handshake (each side has its own QP and must learn the other side’s endpoint before transitioning INIT → RTR → RTS). Doing all of that in response to a single message would block our actor loop while awaiting peer RPCs, and the peer’s symmetric request would block waiting for us — a deadlock.

Instead, IbvManagerActor does only sync bookkeeping in the handler and offloads the handshake to a per-QP child actor, [QueuePairInitializer]. The store of QPs ([Self::qps]) is keyed by [QpKey] and holds a [QpState]: Pending { info, initializer, waiters } while the handshake runs, Ready(qp) once this side is RTS and has observed the peer’s RTS, or Failed(error) as a tombstone after a fatal error.

Structs

IbvBackend

Wrapper around ActorHandle<IbvManagerActor> that moves the RDMA data-plane (post send/recv, poll CQ) off the actor loop while keeping state-mutating operations (MR registration/deregistration, QP management) serialized through actor messages.

IbvManagerActor

Manages all ibverbs-specific RDMA resources and operations.

Enums

IbvManagerLocalMessage

Local-only messages for IbvManagerActor.

IbvManagerMessage

Cross-proc messages handled by IbvManagerActor.

Traits

IbvManagerLocalMessageClient

The custom client trait for this message type.

IbvManagerLocalMessageHandler

The custom handler trait for this message type.

IbvManagerMessageClient

The custom client trait for this message type.

IbvManagerMessageHandler

The custom handler trait for this message type.