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.