sheepdog: Avoid deadlock in error path

[qemu.git] / qapi-schema.json

# -*- Mode: Python -*-
#
# QAPI Schema

##
# @NameInfo:
#
# Guest name information.
#
# @name: #optional The name of the guest
#
# Since 0.14.0
##
{ 'type': 'NameInfo', 'data': {'*name': 'str'} }

##
# @query-name:
#
# Return the name information of a guest.
#
# Returns: @NameInfo of the guest
#
# Since 0.14.0
##
{ 'command': 'query-name', 'returns': 'NameInfo' }

##
# @VersionInfo:
#
# A description of QEMU's version.
#
# @qemu.major:  The major version of QEMU
#
# @qemu.minor:  The minor version of QEMU
#
# @qemu.micro:  The micro version of QEMU.  By current convention, a micro
#               version of 50 signifies a development branch.  A micro version
#               greater than or equal to 90 signifies a release candidate for
#               the next minor version.  A micro version of less than 50
#               signifies a stable release.
#
# @package:     QEMU will always set this field to an empty string.  Downstream
#               versions of QEMU should set this to a non-empty string.  The
#               exact format depends on the downstream however it highly
#               recommended that a unique name is used.
#
# Since: 0.14.0
##
{ 'type': 'VersionInfo',
  'data': {'qemu': {'major': 'int', 'minor': 'int', 'micro': 'int'},
           'package': 'str'} }

##
# @query-version:
#
# Returns the current version of QEMU.
#
# Returns:  A @VersionInfo object describing the current version of QEMU.
#
# Since: 0.14.0
##
{ 'command': 'query-version', 'returns': 'VersionInfo' }

##
# @KvmInfo:
#
# Information about support for KVM acceleration
#
# @enabled: true if KVM acceleration is active
#
# @present: true if KVM acceleration is built into this executable
#
# Since: 0.14.0
##
{ 'type': 'KvmInfo', 'data': {'enabled': 'bool', 'present': 'bool'} }

##
# @query-kvm:
#
# Returns information about KVM acceleration
#
# Returns: @KvmInfo
#
# Since: 0.14.0
##
{ 'command': 'query-kvm', 'returns': 'KvmInfo' }

##
# @RunState
#
# An enumation of VM run states.
#
# @debug: QEMU is running on a debugger
#
# @inmigrate: guest is paused waiting for an incoming migration
#
# @internal-error: An internal error that prevents further guest execution
# has occurred
#
# @io-error: the last IOP has failed and the device is configured to pause
# on I/O errors
#
# @paused: guest has been paused via the 'stop' command
#
# @postmigrate: guest is paused following a successful 'migrate'
#
# @prelaunch: QEMU was started with -S and guest has not started
#
# @finish-migrate: guest is paused to finish the migration process
#
# @restore-vm: guest is paused to restore VM state
#
# @running: guest is actively running
#
# @save-vm: guest is paused to save the VM state
#
# @shutdown: guest is shut down (and -no-shutdown is in use)
#
# @watchdog: the watchdog action is configured to pause and has been triggered
##
{ 'enum': 'RunState',
  'data': [ 'debug', 'inmigrate', 'internal-error', 'io-error', 'paused',
            'postmigrate', 'prelaunch', 'finish-migrate', 'restore-vm',
            'running', 'save-vm', 'shutdown', 'watchdog' ] }

##
# @StatusInfo:
#
# Information about VCPU run state
#
# @running: true if all VCPUs are runnable, false if not runnable
#
# @singlestep: true if VCPUs are in single-step mode
#
# @status: the virtual machine @RunState
#
# Since:  0.14.0
#
# Notes: @singlestep is enabled through the GDB stub
##
{ 'type': 'StatusInfo',
  'data': {'running': 'bool', 'singlestep': 'bool', 'status': 'RunState'} }

##
# @query-status:
#
# Query the run status of all VCPUs
#
# Returns: @StatusInfo reflecting all VCPUs
#
# Since:  0.14.0
##
{ 'command': 'query-status', 'returns': 'StatusInfo' }

##
# @UuidInfo:
#
# Guest UUID information.
#
# @UUID: the UUID of the guest
#
# Since: 0.14.0
#
# Notes: If no UUID was specified for the guest, a null UUID is returned.
##
{ 'type': 'UuidInfo', 'data': {'UUID': 'str'} }

##
# @query-uuid:
#
# Query the guest UUID information.
#
# Returns: The @UuidInfo for the guest
#
# Since 0.14.0
##
{ 'command': 'query-uuid', 'returns': 'UuidInfo' }

##
# @ChardevInfo:
#
# Information about a character device.
#
# @label: the label of the character device
#
# @filename: the filename of the character device
#
# Notes: @filename is encoded using the QEMU command line character device
#        encoding.  See the QEMU man page for details.
#
# Since: 0.14.0
##
{ 'type': 'ChardevInfo', 'data': {'label': 'str', 'filename': 'str'} }

##
# @query-chardev:
#
# Returns information about current character devices.
#
# Returns: a list of @ChardevInfo
#
# Since: 0.14.0
##
{ 'command': 'query-chardev', 'returns': ['ChardevInfo'] }

##
# @CommandInfo:
#
# Information about a QMP command
#
# @name: The command name
#
# Since: 0.14.0
##
{ 'type': 'CommandInfo', 'data': {'name': 'str'} }

##
# @query-commands:
#
# Return a list of supported QMP commands by this server
#
# Returns: A list of @CommandInfo for all supported commands
#
# Since: 0.14.0
##
{ 'command': 'query-commands', 'returns': ['CommandInfo'] }

##
# @MigrationStats
#
# Detailed migration status.
#
# @transferred: amount of bytes already transferred to the target VM
#
# @remaining: amount of bytes remaining to be transferred to the target VM
#
# @total: total amount of bytes involved in the migration process
#
# Since: 0.14.0.
##
{ 'type': 'MigrationStats',
  'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' } }

##
# @MigrationInfo
#
# Information about current migration process.
#
# @status: #optional string describing the current migration status.
#          As of 0.14.0 this can be 'active', 'completed', 'failed' or
#          'cancelled'. If this field is not returned, no migration process
#          has been initiated
#
# @ram: #optional @MigrationStats containing detailed migration status,
#       only returned if status is 'active'
#
# @disk: #optional @MigrationStats containing detailed disk migration
#        status, only returned if status is 'active' and it is a block
#        migration
#
# Since: 0.14.0
##
{ 'type': 'MigrationInfo',
  'data': {'*status': 'str', '*ram': 'MigrationStats',
           '*disk': 'MigrationStats'} }

##
# @query-migrate
#
# Returns information about current migration process.
#
# Returns: @MigrationInfo
#
# Since: 0.14.0
##
{ 'command': 'query-migrate', 'returns': 'MigrationInfo' }

##
# @MouseInfo:
#
# Information about a mouse device.
#
# @name: the name of the mouse device
#
# @index: the index of the mouse device
#
# @current: true if this device is currently receiving mouse events
#
# @absolute: true if this device supports absolute coordinates as input
#
# Since: 0.14.0
##
{ 'type': 'MouseInfo',
  'data': {'name': 'str', 'index': 'int', 'current': 'bool',
           'absolute': 'bool'} }

##
# @query-mice:
#
# Returns information about each active mouse device
#
# Returns: a list of @MouseInfo for each device
#
# Since: 0.14.0
##
{ 'command': 'query-mice', 'returns': ['MouseInfo'] }

##
# @CpuInfo:
#
# Information about a virtual CPU
#
# @CPU: the index of the virtual CPU
#
# @current: this only exists for backwards compatible and should be ignored
# 
# @halted: true if the virtual CPU is in the halt state.  Halt usually refers
#          to a processor specific low power mode.
#
# @pc: #optional If the target is i386 or x86_64, this is the 64-bit instruction
#                pointer.
#                If the target is Sparc, this is the PC component of the
#                instruction pointer.
#
# @nip: #optional If the target is PPC, the instruction pointer
#
# @npc: #optional If the target is Sparc, the NPC component of the instruction
#                 pointer
#
# @PC: #optional If the target is MIPS, the instruction pointer
#
# @thread_id: ID of the underlying host thread
#
# Since: 0.14.0
#
# Notes: @halted is a transient state that changes frequently.  By the time the
#        data is sent to the client, the guest may no longer be halted.
##
{ 'type': 'CpuInfo',
  'data': {'CPU': 'int', 'current': 'bool', 'halted': 'bool', '*pc': 'int',
           '*nip': 'int', '*npc': 'int', '*PC': 'int', 'thread_id': 'int'} }

##
# @query-cpus:
#
# Returns a list of information about each virtual CPU.
#
# Returns: a list of @CpuInfo for each virtual CPU
#
# Since: 0.14.0
##
{ 'command': 'query-cpus', 'returns': ['CpuInfo'] }

##
# @BlockDeviceInfo:
#
# Information about the backing device for a block device.
#
# @file: the filename of the backing device
#
# @ro: true if the backing device was open read-only
#
# @drv: the name of the block format used to open the backing device. As of
#       0.14.0 this can be: 'blkdebug', 'bochs', 'cloop', 'cow', 'dmg',
#       'file', 'file', 'ftp', 'ftps', 'host_cdrom', 'host_device',
#       'host_floppy', 'http', 'https', 'nbd', 'parallels', 'qcow',
#       'qcow2', 'raw', 'tftp', 'vdi', 'vmdk', 'vpc', 'vvfat'
#
# @backing_file: #optional the name of the backing file (for copy-on-write)
#
# @encrypted: true if the backing device is encrypted
#
# Since: 0.14.0
#
# Notes: This interface is only found in @BlockInfo.
##
{ 'type': 'BlockDeviceInfo',
  'data': { 'file': 'str', 'ro': 'bool', 'drv': 'str',
            '*backing_file': 'str', 'encrypted': 'bool' } }

##
# @BlockDeviceIoStatus:
#
# An enumeration of block device I/O status.
#
# @ok: The last I/O operation has succeeded
#
# @failed: The last I/O operation has failed
#
# @nospace: The last I/O operation has failed due to a no-space condition
#
# Since: 1.0
##
{ 'enum': 'BlockDeviceIoStatus', 'data': [ 'ok', 'failed', 'nospace' ] }

##
# @BlockInfo:
#
# Block device information.  This structure describes a virtual device and
# the backing device associated with it.
#
# @device: The device name associated with the virtual device.
#
# @type: This field is returned only for compatibility reasons, it should
#        not be used (always returns 'unknown')
#
# @removable: True if the device supports removable media.
#
# @locked: True if the guest has locked this device from having its media
#          removed
#
# @tray_open: #optional True if the device has a tray and it is open
#             (only present if removable is true)
#
# @io-status: #optional @BlockDeviceIoStatus. Only present if the device
#             supports it and the VM is configured to stop on errors
#
# @inserted: #optional @BlockDeviceInfo describing the device if media is
#            present
#
# Since:  0.14.0
##
{ 'type': 'BlockInfo',
  'data': {'device': 'str', 'type': 'str', 'removable': 'bool',
           'locked': 'bool', '*inserted': 'BlockDeviceInfo',
           '*tray_open': 'bool', '*io-status': 'BlockDeviceIoStatus'} }

##
# @query-block:
#
# Get a list of BlockInfo for all virtual block devices.
#
# Returns: a list of @BlockInfo describing each virtual block device
#
# Since: 0.14.0
##
{ 'command': 'query-block', 'returns': ['BlockInfo'] }

##
# @BlockDeviceStats:
#
# Statistics of a virtual block device or a block backing device.
#
# @rd_bytes:      The number of bytes read by the device.
#
# @wr_bytes:      The number of bytes written by the device.
#
# @rd_operations: The number of read operations performed by the device.
#
# @wr_operations: The number of write operations performed by the device.
#
# @flush_operations: The number of cache flush operations performed by the
#                    device (since 0.15.0)
#
# @flush_total_time_ns: Total time spend on cache flushes in nano-seconds
#                       (since 0.15.0).
#
# @wr_total_time_ns: Total time spend on writes in nano-seconds (since 0.15.0).
#
# @rd_total_time_ns: Total_time_spend on reads in nano-seconds (since 0.15.0).
#
# @wr_highest_offset: The offset after the greatest byte written to the
#                     device.  The intended use of this information is for
#                     growable sparse files (like qcow2) that are used on top
#                     of a physical device.
#
# Since: 0.14.0
##
{ 'type': 'BlockDeviceStats',
  'data': {'rd_bytes': 'int', 'wr_bytes': 'int', 'rd_operations': 'int',
           'wr_operations': 'int', 'flush_operations': 'int',
           'flush_total_time_ns': 'int', 'wr_total_time_ns': 'int',
           'rd_total_time_ns': 'int', 'wr_highest_offset': 'int' } }

##
# @BlockStats:
#
# Statistics of a virtual block device or a block backing device.
#
# @device: #optional If the stats are for a virtual block device, the name
#          corresponding to the virtual block device.
#
# @stats:  A @BlockDeviceStats for the device.
#
# @parent: #optional This may point to the backing block device if this is a
#          a virtual block device.  If it's a backing block, this will point
#          to the backing file is one is present.
#
# Since: 0.14.0
##
{ 'type': 'BlockStats',
  'data': {'*device': 'str', 'stats': 'BlockDeviceStats',
           '*parent': 'BlockStats'} }

##
# @query-blockstats:
#
# Query the @BlockStats for all virtual block devices.
#
# Returns: A list of @BlockStats for each virtual block devices.
#
# Since: 0.14.0
##
{ 'command': 'query-blockstats', 'returns': ['BlockStats'] }

##
# @VncClientInfo:
#
# Information about a connected VNC client.
#
# @host: The host name of the client.  QEMU tries to resolve this to a DNS name
#        when possible.
#
# @family: 'ipv6' if the client is connected via IPv6 and TCP
#          'ipv4' if the client is connected via IPv4 and TCP
#          'unix' if the client is connected via a unix domain socket
#          'unknown' otherwise
#
# @service: The service name of the client's port.  This may depends on the
#           host system's service database so symbolic names should not be
#           relied on.
#
# @x509_dname: #optional If x509 authentication is in use, the Distinguished
#              Name of the client.
#
# @sasl_username: #optional If SASL authentication is in use, the SASL username
#                 used for authentication.
#
# Since: 0.14.0
##
{ 'type': 'VncClientInfo',
  'data': {'host': 'str', 'family': 'str', 'service': 'str',
           '*x509_dname': 'str', '*sasl_username': 'str'} }

##
# @VncInfo:
#
# Information about the VNC session.
#
# @enabled: true if the VNC server is enabled, false otherwise
#
# @host: #optional The hostname the VNC server is bound to.  This depends on
#        the name resolution on the host and may be an IP address.
#
# @family: #optional 'ipv6' if the host is listening for IPv6 connections
#                    'ipv4' if the host is listening for IPv4 connections
#                    'unix' if the host is listening on a unix domain socket
#                    'unknown' otherwise
#
# @service: #optional The service name of the server's port.  This may depends
#           on the host system's service database so symbolic names should not
#           be relied on.
#
# @auth: #optional the current authentication type used by the server
#        'none' if no authentication is being used
#        'vnc' if VNC authentication is being used
#        'vencrypt+plain' if VEncrypt is used with plain text authentication
#        'vencrypt+tls+none' if VEncrypt is used with TLS and no authentication
#        'vencrypt+tls+vnc' if VEncrypt is used with TLS and VNC authentication
#        'vencrypt+tls+plain' if VEncrypt is used with TLS and plain text auth
#        'vencrypt+x509+none' if VEncrypt is used with x509 and no auth
#        'vencrypt+x509+vnc' if VEncrypt is used with x509 and VNC auth
#        'vencrypt+x509+plain' if VEncrypt is used with x509 and plain text auth
#        'vencrypt+tls+sasl' if VEncrypt is used with TLS and SASL auth
#        'vencrypt+x509+sasl' if VEncrypt is used with x509 and SASL auth
#
# @clients: a list of @VncClientInfo of all currently connected clients
#
# Since: 0.14.0
##
{ 'type': 'VncInfo',
  'data': {'enabled': 'bool', '*host': 'str', '*family': 'str',
           '*service': 'str', '*auth': 'str', '*clients': ['VncClientInfo']} }

##
# @query-vnc:
#
# Returns information about the current VNC server
#
# Returns: @VncInfo
#          If VNC support is not compiled in, FeatureDisabled
#
# Since: 0.14.0
##
{ 'command': 'query-vnc', 'returns': 'VncInfo' }

##
# @SpiceChannel
#
# Information about a SPICE client channel.
#
# @host: The host name of the client.  QEMU tries to resolve this to a DNS name
#        when possible.
#
# @family: 'ipv6' if the client is connected via IPv6 and TCP
#          'ipv4' if the client is connected via IPv4 and TCP
#          'unix' if the client is connected via a unix domain socket
#          'unknown' otherwise
#
# @port: The client's port number.
#
# @connection-id: SPICE connection id number.  All channels with the same id
#                 belong to the same SPICE session.
#
# @connection-type: SPICE channel type number.  "1" is the main control channel,
#                   filter for this one if you want track spice sessions only
#
# @channel-id: SPICE channel ID number.  Usually "0", might be different needed
#              when multiple channels of the same type exist, such as multiple
#              display channels in a multihead setup
#
# @tls: true if the channel is encrypted, false otherwise.
#
# Since: 0.14.0
##
{ 'type': 'SpiceChannel',
  'data': {'host': 'str', 'family': 'str', 'port': 'str',
           'connection-id': 'int', 'channel-type': 'int', 'channel-id': 'int',
           'tls': 'bool'} }

##
# @SpiceInfo
#
# Information about the SPICE session.
# 
# @enabled: true if the SPICE server is enabled, false otherwise
#
# @host: #optional The hostname the SPICE server is bound to.  This depends on
#        the name resolution on the host and may be an IP address.
#
# @port: #optional The SPICE server's port number.
#
# @compiled-version: #optional SPICE server version.
#
# @tls-port: #optional The SPICE server's TLS port number.
#
# @auth: #optional the current authentication type used by the server
#        'none' if no authentication is being used
#        'spice' (TODO: describe)
#
# @channels: a list of @SpiceChannel for each active spice channel
#
# Since: 0.14.0
##
{ 'type': 'SpiceInfo',
  'data': {'enabled': 'bool', '*host': 'str', '*port': 'int',
           '*tls-port': 'int', '*auth': 'str', '*compiled-version': 'str',
           '*channels': ['SpiceChannel']} }

##
# @query-spice
#
# Returns information about the current SPICE server
#
# Returns: @SpiceInfo
#
# Since: 0.14.0
##
{ 'command': 'query-spice', 'returns': 'SpiceInfo' }

##
# @BalloonInfo:
#
# Information about the guest balloon device.
#
# @actual: the number of bytes the balloon currently contains
#
# @mem_swapped_in: #optional number of pages swapped in within the guest
#
# @mem_swapped_out: #optional number of pages swapped out within the guest
#
# @major_page_faults: #optional number of major page faults within the guest
#
# @minor_page_faults: #optional number of minor page faults within the guest
#
# @free_mem: #optional amount of memory (in bytes) free in the guest
#
# @total_mem: #optional amount of memory (in bytes) visible to the guest
#
# Since: 0.14.0
#
# Notes: all current versions of QEMU do not fill out optional information in
#        this structure.
##
{ 'type': 'BalloonInfo',
  'data': {'actual': 'int', '*mem_swapped_in': 'int',
           '*mem_swapped_out': 'int', '*major_page_faults': 'int',
           '*minor_page_faults': 'int', '*free_mem': 'int',
           '*total_mem': 'int'} }

##
# @query-balloon:
#
# Return information about the balloon device.
#
# Returns: @BalloonInfo on success
#          If the balloon driver is enabled but not functional because the KVM
#          kernel module cannot support it, KvmMissingCap
#          If no balloon device is present, DeviceNotActive
#
# Since: 0.14.0
##
{ 'command': 'query-balloon', 'returns': 'BalloonInfo' }

##
# @PciMemoryRange:
#
# A PCI device memory region
#
# @base: the starting address (guest physical)
#
# @limit: the ending address (guest physical)
#
# Since: 0.14.0
##
{ 'type': 'PciMemoryRange', 'data': {'base': 'int', 'limit': 'int'} }

##
# @PciMemoryRegion
#
# Information about a PCI device I/O region.
#
# @bar: the index of the Base Address Register for this region
#
# @type: 'io' if the region is a PIO region
#        'memory' if the region is a MMIO region
#
# @prefetch: #optional if @type is 'memory', true if the memory is prefetchable
#
# @mem_type_64: #optional if @type is 'memory', true if the BAR is 64-bit
#
# Since: 0.14.0
##
{ 'type': 'PciMemoryRegion',
  'data': {'bar': 'int', 'type': 'str', 'address': 'int', 'size': 'int',
           '*prefetch': 'bool', '*mem_type_64': 'bool' } }

##
# @PciBridgeInfo:
#
# Information about a PCI Bridge device
#
# @bus.number: primary bus interface number.  This should be the number of the
#              bus the device resides on.
#
# @bus.secondary: secondary bus interface number.  This is the number of the
#                 main bus for the bridge
#
# @bus.subordinate: This is the highest number bus that resides below the
#                   bridge.
#
# @bus.io_range: The PIO range for all devices on this bridge
#
# @bus.memory_range: The MMIO range for all devices on this bridge
#
# @bus.prefetchable_range: The range of prefetchable MMIO for all devices on
#                          this bridge
#
# @devices: a list of @PciDeviceInfo for each device on this bridge
#
# Since: 0.14.0
##
{ 'type': 'PciBridgeInfo',
  'data': {'bus': { 'number': 'int', 'secondary': 'int', 'subordinate': 'int',
                    'io_range': 'PciMemoryRange',
                    'memory_range': 'PciMemoryRange',
                    'prefetchable_range': 'PciMemoryRange' },
           '*devices': ['PciDeviceInfo']} }

##
# @PciDeviceInfo:
#
# Information about a PCI device
#
# @bus: the bus number of the device
#
# @slot: the slot the device is located in
#
# @function: the function of the slot used by the device
#
# @class_info.desc: #optional a string description of the device's class
#
# @class_info.class: the class code of the device
#
# @id.device: the PCI device id
#
# @id.vendor: the PCI vendor id
#
# @irq: #optional if an IRQ is assigned to the device, the IRQ number
#
# @qdev_id: the device name of the PCI device
#
# @pci_bridge: if the device is a PCI bridge, the bridge information
#
# @regions: a list of the PCI I/O regions associated with the device
#
# Notes: the contents of @class_info.desc are not stable and should only be
#        treated as informational.
#
# Since: 0.14.0
##
{ 'type': 'PciDeviceInfo',
  'data': {'bus': 'int', 'slot': 'int', 'function': 'int',
           'class_info': {'*desc': 'str', 'class': 'int'},
           'id': {'device': 'int', 'vendor': 'int'},
           '*irq': 'int', 'qdev_id': 'str', '*pci_bridge': 'PciBridgeInfo',
           'regions': ['PciMemoryRegion']} }

##
# @PciInfo:
#
# Information about a PCI bus
#
# @bus: the bus index
#
# @devices: a list of devices on this bus
#
# Since: 0.14.0
##
{ 'type': 'PciInfo', 'data': {'bus': 'int', 'devices': ['PciDeviceInfo']} }

##
# @query-pci:
#
# Return information about the PCI bus topology of the guest.
#
# Returns: a list of @PciInfo for each PCI bus
#
# Since: 0.14.0
##
{ 'command': 'query-pci', 'returns': ['PciInfo'] }

##
# @quit:
#
# This command will cause the QEMU process to exit gracefully.  While every
# attempt is made to send the QMP response before terminating, this is not
# guaranteed.  When using this interface, a premature EOF would not be
# unexpected.
#
# Since: 0.14.0
##
{ 'command': 'quit' }

##
# @stop:
#
# Stop all guest VCPU execution.
#
# Since:  0.14.0
#
# Notes:  This function will succeed even if the guest is already in the stopped
#         state
##
{ 'command': 'stop' }

##
# @system_reset:
#
# Performs a hard reset of a guest.
#
# Since: 0.14.0
##
{ 'command': 'system_reset' }

##
# @system_powerdown:
#
# Requests that a guest perform a powerdown operation.
#
# Since: 0.14.0
#
# Notes: A guest may or may not respond to this command.  This command
#        returning does not indicate that a guest has accepted the request or
#        that it has shut down.  Many guests will respond to this command by
#        prompting the user in some way.
##
{ 'command': 'system_powerdown' }

##
# @cpu:
#
# This command is a nop that is only provided for the purposes of compatibility.
#
# Since: 0.14.0
#
# Notes: Do not use this command.
##
{ 'command': 'cpu', 'data': {'index': 'int'} }