Crate dbs_virtio_devices

Interfaces and implementations of virtio devices.

Please refer to [Virtio Specification] (http://docs.oasis-open.org/virtio/virtio/v1.0/cs04/virtio-v1.0-cs04.html#x1-1090002) for more information.

Modules

epoll_helper

Structs

VirtioDeviceConfig

Virtio device configuration information.

VirtioDeviceInfo

A helper struct to support basic operations for emulated VirtioDevice backend devices.

VirtioQueueConfig

Virtio queue configuration information.

VirtioSharedMemory

Device memory shared between guest and the device backend driver, defined by the Virtio specification for Virtio-fs devices.

VirtioSharedMemoryList

A list of Shared Memory regions

Enums

ActivateError

Error code for VirtioDevice::activate().

Error

Error for virtio devices to handle requests from guests.

VirtioVersion

Version of virtio specifications supported by PCI virtio devices.

Constants

DEVICE_ACKNOWLEDGE

Indicates that the guest OS has found the device and recognized it as a valid virtio device.

DEVICE_DRIVER

Indicates that the guest OS knows how to drive the device.

DEVICE_DRIVER_OK

Indicates that the driver is set up and ready to drive the device.

DEVICE_FAILED

Indicates that something went wrong in the guest, and it has given up on the device. This could be an internal error, or the driver didn’t like the device for some reason, or even a fatal error during device operation.

DEVICE_FEATURES_OK

Indicates that the driver has acknowledged all the features it understands, and feature negotiation is complete.

DEVICE_INIT

Initial state after device initialization/reset.

DEVICE_NEEDS_RESET

Indicates that the device has experienced an error from which it can’t recover.

TYPE_BALLOON

Virtio balloon device.

TYPE_BLOCK

Virtio block device.

TYPE_MEM

Virtio mem device.

TYPE_NET

Virtio network card device.

TYPE_PMEM

Virtio-pmem device.

TYPE_RNG

Virtio-rng device.

TYPE_VIRTIO_FS

Virtio-fs virtual device.

TYPE_VSOCK

Virtio vsock device.

VIRTIO_INTR_CONFIG

Device configuration changed.

VIRTIO_INTR_VRING

Data available in used queue.

VIRTIO_LEGACY_PAGE_SIZE

Page size for legacy PCI virtio devices. Assume it’s 4K.

Traits

DbsGuestAddressSpace

VirtioDevice

Trait for Virtio transport layer to manage virtio devices.

VirtioRegionHandler

A callback for the VMM to insert memory region for virtio devices that has device memory, such as DAX of virtiofs, pmem.

Functions

create_device_notifier

Create an interrupt notifier for virtio device change events.

create_queue_notifier

Create an interrupt notifier for virtio queue notification events.

Type Definitions

ActivateResult

Specialized std::result::Result for VirtioDevice::activate().

Result

Specialized std::result::Result for Virtio device operations.