morpheus_network::driver

Module virtio_blk

Expand description

VirtIO block device driver.

Provides block I/O for ISO persistence via VirtIO-blk.

§Architecture

VirtIO-blk uses a single virtqueue for all I/O operations. Each request is a 3-descriptor chain:

Request header (16 bytes): type, reserved, sector
Data buffer: read/write data
Status byte: completion status

§Reference

VirtIO Spec 1.2 §5.2, NETWORK_IMPL_GUIDE.md §6

Structs§

BlkPollResult
Result from asm_virtio_blk_poll_complete
InFlightRequest 🔒
Track in-flight request.
VirtioBlkConfig
VirtIO-blk driver configuration.
VirtioBlkDriver
VirtIO block device driver.
VirtioBlkReqHeader
VirtIO-blk request header (16 bytes).

Enums§

VirtioBlkInitError
Initialization errors.

Constants§

DESIRED_FEATURES 🔒
Desired features
MAX_IN_FLIGHT 🔒
Maximum in-flight requests (queue_size / 3 since each request uses 3 descriptors)
REQUIRED_FEATURES 🔒
Required features
VIRTIO_BLK_F_BLK_SIZE 🔒
VIRTIO_BLK_F_FLUSH 🔒
VIRTIO_BLK_F_RO 🔒
VIRTIO_BLK_F_SEG_MAX 🔒
VIRTIO_BLK_F_SIZE_MAX 🔒
VIRTIO_BLK_S_IOERR
VIRTIO_BLK_S_OK
Status codes
VIRTIO_BLK_S_UNSUPP
VIRTIO_F_VERSION_1 🔒
VirtIO-blk feature bits
VIRTIO_STATUS_ACKNOWLEDGE 🔒
VirtIO status bits
VIRTIO_STATUS_DRIVER 🔒
VIRTIO_STATUS_DRIVER_OK 🔒
VIRTIO_STATUS_FAILED 🔒
VIRTIO_STATUS_FEATURES_OK 🔒

Functions§