QEMU-GA-REF(7)

NAME
qemu-ga-ref - QEMU Guest Agent Protocol Reference

  Contents

•   QEMU Guest Agent Protocol Reference

•   General note concerning the use of guest agent interfaces

•   "unsupported" is a higher-level error than the errors that individual commands might document. The caller should always be prepared to receive QERR_UNSUPPORTED, even if the given command doesn't specify it, or doesn't document any failure mode at all.

•   QEMU guest agent protocol commands and structs

•   guest-sync-delimited (Command)

•   guest-sync (Command)

•   guest-ping (Command)

•   guest-get-time (Command)

•   guest-set-time (Command)

•   GuestAgentCommandInfo (Object)

•   GuestAgentInfo (Object)

•   guest-info (Command)

•   guest-shutdown (Command)

•   guest-file-open (Command)

•   guest-file-close (Command)

•   GuestFileRead (Object)

•   guest-file-read (Command)

•   GuestFileWrite (Object)

•   guest-file-write (Command)

•   GuestFileSeek (Object)

•   QGASeek (Enum)

•   GuestFileWhence (Alternate)

•   guest-file-seek (Command)

•   guest-file-flush (Command)

•   GuestFsfreezeStatus (Enum)

•   guest-fsfreeze-status (Command)

•   guest-fsfreeze-freeze (Command)

•   guest-fsfreeze-freeze-list (Command)

•   guest-fsfreeze-thaw (Command)

•   GuestFilesystemTrimResult (Object)

•   GuestFilesystemTrimResponse (Object)

•   guest-fstrim (Command)

•   guest-suspend-disk (Command)

•   guest-suspend-ram (Command)

•   guest-suspend-hybrid (Command)

•   GuestIpAddressType (Enum)

•   GuestIpAddress (Object)

•   GuestNetworkInterfaceStat (Object)

•   GuestNetworkInterface (Object)

•   guest-network-get-interfaces (Command)

•   GuestLogicalProcessor (Object)

•   guest-get-vcpus (Command)

•   guest-set-vcpus (Command)

•   GuestDiskBusType (Enum)

•   GuestPCIAddress (Object)

•   GuestCCWAddress (Object)

•   GuestDiskAddress (Object)

•   GuestNVMeSmart (Object)

•   GuestDiskSmart (Object)

•   GuestDiskInfo (Object)

•   guest-get-disks (Command)

•   GuestFilesystemInfo (Object)

•   guest-get-fsinfo (Command)

•   guest-set-user-password (Command)

•   GuestMemoryBlock (Object)

•   guest-get-memory-blocks (Command)

•   GuestMemoryBlockResponseType (Enum)

•   GuestMemoryBlockResponse (Object)

•   guest-set-memory-blocks (Command)

•   GuestMemoryBlockInfo (Object)

•   guest-get-memory-block-info (Command)

•   GuestExecStatus (Object)

•   guest-exec-status (Command)

•   GuestExec (Object)

•   GuestExecCaptureOutputMode (Enum)

•   GuestExecCaptureOutput (Alternate)

•   guest-exec (Command)

•   GuestHostName (Object)

•   guest-get-host-name (Command)

•   GuestUser (Object)

•   guest-get-users (Command)

•   GuestTimezone (Object)

•   guest-get-timezone (Command)

•   GuestOSInfo (Object)

•   guest-get-osinfo (Command)

•   GuestDeviceType (Enum)

•   GuestDeviceIdPCI (Object)

•   GuestDeviceId (Object)

•   GuestDeviceInfo (Object)

•   guest-get-devices (Command)

•   GuestAuthorizedKeys (Object)

•   guest-ssh-get-authorized-keys (Command)

•   guest-ssh-add-authorized-keys (Command)

•   guest-ssh-remove-authorized-keys (Command)

•   GuestDiskStats (Object)

•   GuestDiskStatsInfo (Object)

•   guest-get-diskstats (Command)

•   GuestCpuStatsType (Enum)

•   GuestLinuxCpuStats (Object)

•   GuestCpuStats (Object)

•   guest-get-cpustats (Command)

GENERAL NOTE CONCERNING THE USE OF GUEST AGENT INTERFACES
"unsupported" is a higher-level error than the errors that individual commands might document. The caller should always be prepared to receive QERR_UNSUPPORTED, even if the given command doesn't specify it, or doesn't document any failure mode at all.

QEMU GUEST AGENT PROTOCOL COMMANDS AND STRUCTS

  guest-sync-delimited (Command)

Echo back a unique integer value, and prepend to response a leading sentinel byte (0xFF) the client can check scan for.

This is used by clients talking to the guest agent over the wire to ensure the stream is in sync and doesn't contain stale data from previous client. It must be issued upon initial connection, and after any client-side timeouts (including timeouts on receiving a response to this command).

After issuing this request, all guest agent responses should be ignored until the response containing the unique integer value the client passed in is returned. Receival of the 0xFF sentinel byte must be handled as an indication that the client's lexer/tokenizer/parser state should be flushed/reset in preparation for reliably receiving the subsequent response. As an optimization, clients may opt to ignore all data until a sentinel value is receiving to avoid unnecessary processing of stale data.

Similarly, clients should also precede this request with a 0xFF byte to make sure the guest agent flushes any partially read JSON data from a previous client connection.

  Arguments

id: int
    randomly generated 64-bit integer

  Returns

The unique integer id passed in by the client

  Since

1.1

  guest-sync (Command)

Echo back a unique integer value

This is used by clients talking to the guest agent over the wire to ensure the stream is in sync and doesn't contain stale data from previous client. All guest agent responses should be ignored until the provided unique integer value is returned, and it is up to the client to handle stale whole or partially-delivered JSON text in such a way that this response can be obtained.

In cases where a partial stale response was previously received by the client, this cannot always be done reliably. One particular scenario being if qemu-ga responses are fed character-by-character into a JSON parser. In these situations, using guest-sync-delimited may be optimal.

For clients that fetch responses line by line and convert them to JSON objects, guest-sync should be sufficient, but note that in cases where the channel is dirty some attempts at parsing the response may result in a parser error.

Such clients should also precede this command with a 0xFF byte to make sure the guest agent flushes any partially read JSON data from a previous session.

  Arguments

id: int
    randomly generated 64-bit integer

  Returns

The unique integer id passed in by the client

  Since

0.15.0

  guest-ping (Command)

Ping the guest agent, a non-error return implies success

  Since

0.15.0

  guest-get-time (Command)

Get the information about guest's System Time relative to the Epoch of 1970-01-01 in UTC.

  Returns

Time in nanoseconds.

  Since

1.5

  guest-set-time (Command)

Set guest time.

When a guest is paused or migrated to a file then loaded from that file, the guest OS has no idea that there was a big gap in the time. Depending on how long the gap was, NTP might not be able to resynchronize the guest.

This command tries to set guest's System Time to the given value, then sets the Hardware Clock (RTC) to the current System Time. This will make it easier for a guest to resynchronize without waiting for NTP. If no time is specified, then the time to set is read from RTC. However, this may not be supported on all platforms (i.e. Windows). If that's the case users are advised to always pass a value.

  Arguments

time: int (optional)
    time of nanoseconds, relative to the Epoch of 1970-01-01 in UTC.

  Since

1.5

  GuestAgentCommandInfo (Object)

Information about guest agent commands.

  Members

name: string
    name of the command

enabled: boolean
    whether command is currently enabled by guest admin

success-response: boolean
    whether command returns a response on success (since 1.7)

  Since

1.1.0

  GuestAgentInfo (Object)

Information about guest agent.

  Members

version: string
    guest agent version

supported_commands: array of GuestAgentCommandInfo
    Information about guest agent commands

  Since

0.15.0

  guest-info (Command)

Get some information about the guest agent.

  Returns

GuestAgentInfo

  Since

0.15.0

  guest-shutdown (Command)

Initiate guest-activated shutdown. Note: this is an asynchronous shutdown request, with no guarantee of successful shutdown.

  Arguments

mode: string (optional)
    "halt", "powerdown" (default), or "reboot" This command does NOT return a response on success. Success condition is indicated by the VM exiting with a zero exit status or, when running with --no-shutdown, by issuing the query-status QMP command to confirm the VM status is "shutdown".

  Since

0.15.0

  guest-file-open (Command)

Open a file in the guest and retrieve a file handle for it

  Arguments

path: string
    Full path to the file in the guest to open.

mode: string (optional)
    open mode, as per fopen(), "r" is the default.

  Returns

Guest file handle

  Since

0.15.0

  guest-file-close (Command)

Close an open file in the guest

  Arguments

handle: int
    filehandle returned by guest-file-open

  Since

0.15.0

  GuestFileRead (Object)

Result of guest agent file-read operation

  Members

count: int
    number of bytes read (note: count is before base64-encoding is applied)

buf-b64: string
    base64-encoded bytes read

eof: boolean
    whether EOF was encountered during read operation.

  Since

0.15.0

  guest-file-read (Command)

Read from an open file in the guest. Data will be base64-encoded. As this command is just for limited, ad-hoc debugging, such as log file access, the number of bytes to read is limited to 48 MB.

  Arguments

handle: int
    filehandle returned by guest-file-open

count: int (optional)
    maximum number of bytes to read (default is 4KB, maximum is 48MB)

  Returns

GuestFileRead

  Since

0.15.0

  GuestFileWrite (Object)

Result of guest agent file-write operation

  Members

count: int
    number of bytes written (note: count is actual bytes written, after base64-decoding of provided buffer)

eof: boolean
    whether EOF was encountered during write operation.

  Since

0.15.0

  guest-file-write (Command)

Write to an open file in the guest.

  Arguments

handle: int
    filehandle returned by guest-file-open

buf-b64: string
    base64-encoded string representing data to be written

count: int (optional)
    bytes to write (actual bytes, after base64-decode), default is all content in buf-b64 buffer after base64 decoding

  Returns

GuestFileWrite

  Since

0.15.0

  GuestFileSeek (Object)

Result of guest agent file-seek operation

  Members

position: int
    current file position

eof: boolean
    whether EOF was encountered during file seek

  Since

0.15.0

  QGASeek (Enum)

Symbolic names for use in guest-file-seek

  Values

set Set to the specified offset (same effect as 'whence':0)

cur Add offset to the current location (same effect as 'whence':1)

end Add offset to the end of the file (same effect as 'whence':2)

  Since

2.6

  GuestFileWhence (Alternate)

Controls the meaning of offset to guest-file-seek.

  Members

value: int
    Integral value (0 for set, 1 for cur, 2 for end), available for historical reasons, and might differ from the host's or guest's SEEK_* values (since: 0.15)

name: QGASeek
    Symbolic name, and preferred interface

  Since

2.6

  guest-file-seek (Command)

Seek to a position in the file, as with fseek(), and return the current file position afterward. Also encapsulates ftell()'s functionality, with offset=0 and whence=1.

  Arguments

handle: int
    filehandle returned by guest-file-open

offset: int
    bytes to skip over in the file stream

whence: GuestFileWhence
    Symbolic or numeric code for interpreting offset

  Returns

GuestFileSeek

  Since

0.15.0

  guest-file-flush (Command)

Write file changes buffered in userspace to disk/kernel buffers

  Arguments

handle: int
    filehandle returned by guest-file-open

  Since

0.15.0

  GuestFsfreezeStatus (Enum)

An enumeration of filesystem freeze states

  Values

thawed
    filesystems thawed/unfrozen

frozen
    all non-network guest filesystems frozen

  Since

0.15.0

  guest-fsfreeze-status (Command)

Get guest fsfreeze state.

  Returns

GuestFsfreezeStatus ("thawed", "frozen", etc., as defined below)

  Note

This may fail to properly report the current state as a result of some other guest processes having issued an fs freeze/thaw.

  Since

0.15.0

  guest-fsfreeze-freeze (Command)

Sync and freeze all freezable, local guest filesystems. If this command succeeded, you may call guest-fsfreeze-thaw later to unfreeze.

On error, all filesystems will be thawed. If no filesystems are frozen as a result of this call, then guest-fsfreeze-status will remain "thawed" and calling guest-fsfreeze-thaw is not necessary.

  Returns

Number of file systems currently frozen.

  Note

On Windows, the command is implemented with the help of a Volume Shadow-copy Service DLL helper. The frozen state is limited for up to 10 seconds by VSS.

  Since

0.15.0

  guest-fsfreeze-freeze-list (Command)

Sync and freeze specified guest filesystems. See also guest-fsfreeze-freeze.

On error, all filesystems will be thawed.

  Arguments

mountpoints: array of string (optional)
    an array of mountpoints of filesystems to be frozen. If omitted, every mounted filesystem is frozen. Invalid mount points are ignored.

  Returns

Number of file systems currently frozen.

  Since

2.2

  guest-fsfreeze-thaw (Command)

Unfreeze all frozen guest filesystems

  Returns

Number of file systems thawed by this call

  Note

if return value does not match the previous call to guest-fsfreeze-freeze, this likely means some freezable filesystems were unfrozen before this call, and that the filesystem state may have changed before issuing this command.

  Since

0.15.0

  GuestFilesystemTrimResult (Object)

  Members

path: string
    path that was trimmed

error: string (optional)
    an error message when trim failed

trimmed: int (optional)
    bytes trimmed for this path

minimum: int (optional)
    reported effective minimum for this path

  Since

2.4

  GuestFilesystemTrimResponse (Object)

  Members

paths: array of GuestFilesystemTrimResult
    list of GuestFilesystemTrimResult per path that was trimmed

  Since

2.4

  guest-fstrim (Command)

Discard (or "trim") blocks which are not in use by the filesystem.

  Arguments

minimum: int (optional)
    Minimum contiguous free range to discard, in bytes. Free ranges smaller than this may be ignored (this is a hint and the guest may not respect it). By increasing this value, the fstrim operation will complete more quickly for filesystems with badly fragmented free space, although not all blocks will be discarded. The default value is zero, meaning "discard every free block".

  Returns

A GuestFilesystemTrimResponse which contains the status of all trimmed paths. (since 2.4)

  Since

1.2

  guest-suspend-disk (Command)

Suspend guest to disk.

This command attempts to suspend the guest using three strategies, in this order:

•   systemd hibernate

•   pm-utils (via pm-hibernate)

•   manual write into sysfs

    This command does NOT return a response on success. There is a high chance the command succeeded if the VM exits with a zero exit status or, when running with --no-shutdown, by issuing the query-status QMP command to to confirm the VM status is "shutdown". However, the VM could also exit (or set its status to "shutdown") due to other reasons.

  Errors

•   If suspend to disk is not supported, Unsupported

  Notes

It's strongly recommended to issue the guest-sync command before sending commands when the guest resumes

  Since

1.1

  guest-suspend-ram (Command)

Suspend guest to ram.

This command attempts to suspend the guest using three strategies, in this order:

•   systemd hibernate

•   pm-utils (via pm-hibernate)

•   manual write into sysfs

    IMPORTANT: guest-suspend-ram requires working wakeup support in QEMU. You should check QMP command query-current-machine returns wakeup-suspend-support: true before issuing this command. Failure in doing so can result in a suspended guest that QEMU will not be able to awaken, forcing the user to power cycle the guest to bring it back.

    This command does NOT return a response on success. There are two options to check for success:

1.  Wait for the SUSPEND QMP event from QEMU

2.  Issue the query-status QMP command to confirm the VM status is "suspended"

  Errors

•   If suspend to ram is not supported, Unsupported

  Notes

It's strongly recommended to issue the guest-sync command before sending commands when the guest resumes

  Since

1.1

  guest-suspend-hybrid (Command)

Save guest state to disk and suspend to ram.

This command attempts to suspend the guest by executing, in this order:

•   systemd hybrid-sleep

•   pm-utils (via pm-suspend-hybrid)

    IMPORTANT: guest-suspend-hybrid requires working wakeup support in QEMU. You should check QMP command query-current-machine returns wakeup-suspend-support: true before issuing this command. Failure in doing so can result in a suspended guest that QEMU will not be able to awaken, forcing the user to power cycle the guest to bring it back.

    This command does NOT return a response on success. There are two options to check for success:

1.  Wait for the SUSPEND QMP event from QEMU

2.  Issue the query-status QMP command to confirm the VM status is "suspended"

  Errors

•   If hybrid suspend is not supported, Unsupported

  Notes

It's strongly recommended to issue the guest-sync command before sending commands when the guest resumes

  Since

1.1

  GuestIpAddressType (Enum)

An enumeration of supported IP address types

  Values

ipv4
    IP version 4

ipv6
    IP version 6

  Since

1.1

  GuestIpAddress (Object)

  Members

ip-address: string
    IP address

ip-address-type: GuestIpAddressType
    Type of ip-address (e.g. ipv4, ipv6)

prefix: int
    Network prefix length of ip-address

  Since

1.1

  GuestNetworkInterfaceStat (Object)

  Members

rx-bytes: int
    total bytes received

rx-packets: int
    total packets received

rx-errs: int
    bad packets received

rx-dropped: int
    receiver dropped packets

tx-bytes: int
    total bytes transmitted

tx-packets: int
    total packets transmitted

tx-errs: int
    packet transmit problems

tx-dropped: int
    dropped packets transmitted

  Since

2.11

  GuestNetworkInterface (Object)

  Members

name: string
    The name of interface for which info are being delivered

hardware-address: string (optional)
    Hardware address of name

ip-addresses: array of GuestIpAddress (optional)
    List of addresses assigned to name

statistics: GuestNetworkInterfaceStat (optional)
    various statistic counters related to name (since 2.11)

  Since

1.1

  guest-network-get-interfaces (Command)

Get list of guest IP addresses, MAC addresses and netmasks.

  Returns

List of GuestNetworkInterface

  Since

1.1

  GuestLogicalProcessor (Object)

  Members

logical-id: int
    Arbitrary guest-specific unique identifier of the VCPU.

online: boolean
    Whether the VCPU is enabled.

can-offline: boolean (optional)
    Whether offlining the VCPU is possible. This member is always filled in by the guest agent when the structure is returned, and always ignored on input (hence it can be omitted then).

  Since

1.5

  guest-get-vcpus (Command)

Retrieve the list of the guest's logical processors.

This is a read-only operation.

  Returns

The list of all VCPUs the guest knows about. Each VCPU is put on the list exactly once, but their order is unspecified.

  Since

1.5

  guest-set-vcpus (Command)

Attempt to reconfigure (currently: enable/disable) logical processors inside the guest.

  Arguments

vcpus: array of GuestLogicalProcessor
    The logical processors to be reconfigured. This list is processed node by node in order. In each node logical-id is used to look up the guest VCPU, for which online specifies the requested state. The set of distinct logical-id's is only required to be a subset of the guest-supported identifiers. There's no restriction on list length or on repeating the same logical-id (with possibly different online field). Preferably the input list should describe a modified subset of guest-get-vcpus' return value.

  Returns

The length of the initial sublist that has been successfully processed. The guest agent maximizes this value. Possible cases:

•   0: if the vcpus list was empty on input. Guest state has not been changed. Otherwise,

•   < length(vcpus): more than zero initial nodes have been processed, but not the entire vcpus list. Guest state has changed accordingly. To retrieve the error (assuming it persists), repeat the call with the successfully processed initial sublist removed. Otherwise,

•   length(vcpus): call successful.

  Errors

•   If the reconfiguration of the first node in vcpus failed. Guest state has not been changed.

  Since

1.5

  GuestDiskBusType (Enum)

An enumeration of bus type of disks

  Values

ide IDE disks

fdc floppy disks

scsi
    SCSI disks

virtio
    virtio disks

xen Xen disks

usb USB disks

uml UML disks

sata
    SATA disks

sd  SD cards

unknown
    Unknown bus type

ieee1394
    Win IEEE 1394 bus type

ssa Win SSA bus type

fibre
    Win fiber channel bus type

raid
    Win RAID bus type

iscsi
    Win iScsi bus type

sas Win serial-attaches SCSI bus type

mmc Win multimedia card (MMC) bus type

virtual
    Win virtual bus type

file-backed-virtual
    Win file-backed bus type

nvme
    NVMe disks (since 7.1)

  Since

2.2; 'Unknown' and all entries below since 2.4

  GuestPCIAddress (Object)

  Members

domain: int
    domain id

bus: int
    bus id

slot: int
    slot id

function: int
    function id

  Since

2.2

  GuestCCWAddress (Object)

  Members

cssid: int
    channel subsystem image id

ssid: int
    subchannel set id

subchno: int
    subchannel number

devno: int
    device number

  Since

6.0

  GuestDiskAddress (Object)

  Members

pci-controller: GuestPCIAddress
    controller's PCI address (fields are set to -1 if invalid)

bus-type: GuestDiskBusType
    bus type

bus: int
    bus id

target: int
    target id

unit: int
    unit id

serial: string (optional)
    serial number (since: 3.1)

dev: string (optional)
    device node (POSIX) or device UNC (Windows) (since: 3.1)

ccw-address: GuestCCWAddress (optional)
    CCW address on s390x (since: 6.0)

  Since

2.2

  GuestNVMeSmart (Object)

NVMe smart information, based on NVMe specification, section <SMART / Health Information (Log Identifier 02h)>

  Members

critical-warning: int
    Not documented

temperature: int
    Not documented

available-spare: int
    Not documented

available-spare-threshold: int
    Not documented

percentage-used: int
    Not documented

data-units-read-lo: int
    Not documented

data-units-read-hi: int
    Not documented

data-units-written-lo: int
    Not documented

data-units-written-hi: int
    Not documented

host-read-commands-lo: int
    Not documented

host-read-commands-hi: int
    Not documented

host-write-commands-lo: int
    Not documented

host-write-commands-hi: int
    Not documented

controller-busy-time-lo: int
    Not documented

controller-busy-time-hi: int
    Not documented

power-cycles-lo: int
    Not documented

power-cycles-hi: int
    Not documented

power-on-hours-lo: int
    Not documented

power-on-hours-hi: int
    Not documented

unsafe-shutdowns-lo: int
    Not documented

unsafe-shutdowns-hi: int
    Not documented

media-errors-lo: int
    Not documented

media-errors-hi: int
    Not documented

number-of-error-log-entries-lo: int
    Not documented

number-of-error-log-entries-hi: int
    Not documented

  Since

7.1

  GuestDiskSmart (Object)

Disk type related smart information.

  Members

type: GuestDiskBusType
    disk bus type

The members of GuestNVMeSmart when type is "nvme"

  Since

7.1

  GuestDiskInfo (Object)

  Members

name: string
    device node (Linux) or device UNC (Windows)

partition: boolean
    whether this is a partition or disk

dependencies: array of string (optional)
    list of device dependencies; e.g. for LVs of the LVM this will hold the list of PVs, for LUKS encrypted volume this will contain the disk where the volume is placed. (Linux)

address: GuestDiskAddress (optional)
    disk address information (only for non-virtual devices)

alias: string (optional)
    optional alias assigned to the disk, on Linux this is a name assigned by device mapper

smart: GuestDiskSmart (optional)
    disk smart information (Since 7.1)

  Since

5.2

  guest-get-disks (Command)

  Returns

The list of disks in the guest. For Windows these are only the physical disks. On Linux these are all root block devices of non-zero size including e.g. removable devices, loop devices, NBD, etc.

  Since

5.2

  GuestFilesystemInfo (Object)

  Members

name: string
    disk name

mountpoint: string
    mount point path

type: string
    file system type string

used-bytes: int (optional)
    file system used bytes (since 3.0)

total-bytes: int (optional)
    non-root file system total bytes (since 3.0)

disk: array of GuestDiskAddress
    an array of disk hardware information that the volume lies on, which may be empty if the disk type is not supported

  Since

2.2

  guest-get-fsinfo (Command)

  Returns

The list of filesystems information mounted in the guest. The returned mountpoints may be specified to guest-fsfreeze-freeze-list. Network filesystems (such as CIFS and NFS) are not listed.

  Since

2.2

  guest-set-user-password (Command)

  Arguments

username: string
    the user account whose password to change

password: string
    the new password entry string, base64 encoded

crypted: boolean
    true if password is already crypt()d, false if raw If the crypted flag is true, it is the caller's responsibility to ensure the correct crypt() encryption scheme is used. This command does not attempt to interpret or report on the encryption scheme. Refer to the documentation of the guest operating system in question to determine what is supported.

    Not all guest operating systems will support use of the crypted flag, as they may require the clear-text password

    The password parameter must always be base64 encoded before transmission, even if already crypt()d, to ensure it is 8-bit safe when passed as JSON.

  Since

2.3

  GuestMemoryBlock (Object)

  Members

phys-index: int
    Arbitrary guest-specific unique identifier of the MEMORY BLOCK.

online: boolean
    Whether the MEMORY BLOCK is enabled in guest.

can-offline: boolean (optional)
    Whether offlining the MEMORY BLOCK is possible. This member is always filled in by the guest agent when the structure is returned, and always ignored on input (hence it can be omitted then).

  Since

2.3

  guest-get-memory-blocks (Command)

Retrieve the list of the guest's memory blocks.

This is a read-only operation.

  Returns

The list of all memory blocks the guest knows about. Each memory block is put on the list exactly once, but their order is unspecified.

  Since

2.3

  GuestMemoryBlockResponseType (Enum)

An enumeration of memory block operation result.

  Values

success
    the operation of online/offline memory block is successful.

not-found
    can't find the corresponding memoryXXX directory in sysfs.

operation-not-supported
    for some old kernels, it does not support online or offline memory block.

operation-failed
    the operation of online/offline memory block fails, because of some errors happen.

  Since

2.3

  GuestMemoryBlockResponse (Object)

  Members

phys-index: int
    same with the 'phys-index' member of GuestMemoryBlock.

response: GuestMemoryBlockResponseType
    the result of memory block operation.

error-code: int (optional)
    the error number. When memory block operation fails, we assign the value of 'errno' to this member, it indicates what goes wrong. When the operation succeeds, it will be omitted.

  Since

2.3

  guest-set-memory-blocks (Command)

Attempt to reconfigure (currently: enable/disable) state of memory blocks inside the guest.

  Arguments

mem-blks: array of GuestMemoryBlock
    The memory blocks to be reconfigured. This list is processed node by node in order. In each node phys-index is used to look up the guest MEMORY BLOCK, for which online specifies the requested state. The set of distinct phys-index's is only required to be a subset of the guest-supported identifiers. There's no restriction on list length or on repeating the same phys-index (with possibly different online field). Preferably the input list should describe a modified subset of guest-get-memory-blocks' return value.

  Returns

The operation results, it is a list of GuestMemoryBlockResponse, which is corresponding to the input list.

Note: it will return an empty list if the mem-blks list was empty on input, or there is an error, and in this case, guest state will not be changed.

  Since

2.3

  GuestMemoryBlockInfo (Object)

  Members

size: int
    the size (in bytes) of the guest memory blocks, which are the minimal units of memory block online/offline operations (also called Logical Memory Hotplug).

  Since

2.3

  guest-get-memory-block-info (Command)

Get information relating to guest memory blocks.

  Returns

GuestMemoryBlockInfo

  Since

2.3

  GuestExecStatus (Object)

  Members

exited: boolean
    true if process has already terminated.

exitcode: int (optional)
    process exit code if it was normally terminated.

signal: int (optional)
    signal number (linux) or unhandled exception code (windows) if the process was abnormally terminated.

out-data: string (optional)
    base64-encoded stdout of the process. This field will only be populated after the process exits.

err-data: string (optional)
    base64-encoded stderr of the process. Note: out-data and err-data are present only if 'capture-output' was specified for 'guest-exec'. This field will only be populated after the process exits.

out-truncated: boolean (optional)
    true if stdout was not fully captured due to size limitation.

err-truncated: boolean (optional)
    true if stderr was not fully captured due to size limitation.

  Since

2.5

  guest-exec-status (Command)

Check status of process associated with PID retrieved via guest-exec. Reap the process and associated metadata if it has exited.

  Arguments

pid: int
    pid returned from guest-exec

  Returns

GuestExecStatus

  Since

2.5

  GuestExec (Object)

  Members

pid: int
    pid of child process in guest OS

  Since

2.5

  GuestExecCaptureOutputMode (Enum)

An enumeration of guest-exec capture modes.

  Values

none
    do not capture any output

stdout
    only capture stdout

stderr
    only capture stderr

separated
    capture both stdout and stderr, but separated into GuestExecStatus out-data and err-data, respectively

merged (If: not CONFIG_WIN32)
    capture both stdout and stderr, but merge together into out-data. Not effective on windows guests.

  Since

8.0

  GuestExecCaptureOutput (Alternate)

Controls what guest-exec output gets captures.

  Members

flag: boolean
    captures both stdout and stderr if true. Equivalent to GuestExecCaptureOutputMode::all. (since 2.5)

mode: GuestExecCaptureOutputMode
    capture mode; preferred interface

  Since

8.0

  guest-exec (Command)

Execute a command in the guest

  Arguments

path: string
    path or executable name to execute

arg: array of string (optional)
    argument list to pass to executable

env: array of string (optional)
    environment variables to pass to executable

input-data: string (optional)
    data to be passed to process stdin (base64 encoded)

capture-output: GuestExecCaptureOutput (optional)
    bool flag to enable capture of stdout/stderr of running process. Defaults to false.

  Returns

PID

  Since

2.5

  GuestHostName (Object)

  Members

host-name: string
    Fully qualified domain name of the guest OS

  Since

2.10

  guest-get-host-name (Command)

Return a name for the machine.

The returned name is not necessarily a fully-qualified domain name, or even present in DNS or some other name service at all. It need not even be unique on your local network or site, but usually it is.

  Returns

the host name of the machine

  Since

2.10

  GuestUser (Object)

  Members

user: string
    Username

domain: string (optional)
    Logon domain (windows only)

login-time: number
    Time of login of this user on the computer. If multiple instances of the user are logged in, the earliest login time is reported. The value is in fractional seconds since epoch time.

  Since

2.10

  guest-get-users (Command)

Retrieves a list of currently active users on the VM.

  Returns

A unique list of users.

  Since

2.10

  GuestTimezone (Object)

  Members

zone: string (optional)
    Timezone name. These values may differ depending on guest/OS and should only be used for informational purposes.

offset: int
    Offset to UTC in seconds, negative numbers for time zones west of GMT, positive numbers for east

  Since

2.10

  guest-get-timezone (Command)

Retrieves the timezone information from the guest.

  Returns

A GuestTimezone dictionary.

  Since

2.10

  GuestOSInfo (Object)

  Members

kernel-release: string (optional)

•   POSIX: release field returned by uname(2)

•   Windows: build number of the OS

kernel-version: string (optional)

•   POSIX: version field returned by uname(2)

•   Windows: version number of the OS

machine: string (optional)

•   POSIX: machine field returned by uname(2)

•   Windows: one of x86, x86_64, arm, ia64

id: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: contains string "mswindows"

name: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: contains string "Microsoft Windows"

pretty-name: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: product name, e.g. "Microsoft Windows 10 Enterprise"

version: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: long version string, e.g. "Microsoft Windows Server 2008"

version-id: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: short version identifier, e.g. "7" or "20012r2"

variant: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: contains string "server" or "client"

variant-id: string (optional)

•   POSIX: as defined by os-release(5)

•   Windows: contains string "server" or "client"

  Notes

On POSIX systems the fields id, name, pretty-name, version, version-id, variant and variant-id follow the definition specified in os-release(5). Refer to the manual page for exact description of the fields. Their values are taken from the os-release file. If the file is not present in the system, or the values are not present in the file, the fields are not included.

On Windows the values are filled from information gathered from the system.

  Since

2.10

  guest-get-osinfo (Command)

Retrieve guest operating system information

  Returns

GuestOSInfo

  Since

2.10

  GuestDeviceType (Enum)

  Values

pci PCI device

  GuestDeviceIdPCI (Object)

  Members

vendor-id: int
    vendor ID

device-id: int
    device ID

  Since

5.2

  GuestDeviceId (Object)

Id of the device

  Members

type: GuestDeviceType
    device type

The members of GuestDeviceIdPCI when type is "pci"

  Since

5.2

  GuestDeviceInfo (Object)

  Members

driver-name: string
    name of the associated driver

driver-date: int (optional)
    driver release date, in nanoseconds since the epoch

driver-version: string (optional)
    driver version

id: GuestDeviceId (optional)
    device ID

  Since

5.2

  guest-get-devices (Command)

Retrieve information about device drivers in Windows guest

  Returns

GuestDeviceInfo

  Since

5.2

  GuestAuthorizedKeys (Object)

  Members

keys: array of string
    public keys (in OpenSSH/sshd(8) authorized_keys format)

  Since

5.2

  If

CONFIG_POSIX

  guest-ssh-get-authorized-keys (Command)

Return the public keys from user .ssh/authorized_keys on Unix systems (not implemented for other systems).

  Arguments

username: string
    the user account to add the authorized keys

  Returns

GuestAuthorizedKeys

  Since

5.2

  If

CONFIG_POSIX

  guest-ssh-add-authorized-keys (Command)

Append public keys to user .ssh/authorized_keys on Unix systems (not implemented for other systems).

  Arguments

username: string
    the user account to add the authorized keys

keys: array of string
    the public keys to add (in OpenSSH/sshd(8) authorized_keys format)

reset: boolean (optional)
    ignore the existing content, set it with the given keys only

  Since

5.2

  If

CONFIG_POSIX

  guest-ssh-remove-authorized-keys (Command)

Remove public keys from the user .ssh/authorized_keys on Unix systems (not implemented for other systems). It's not an error if the key is already missing.

  Arguments

username: string
    the user account to remove the authorized keys

keys: array of string
    the public keys to remove (in OpenSSH/sshd(8) authorized_keys format)

  Since

5.2

  If

CONFIG_POSIX

  GuestDiskStats (Object)

  Members

read-sectors: int (optional)
    sectors read

read-ios: int (optional)
    reads completed successfully

read-merges: int (optional)
    read requests merged

write-sectors: int (optional)
    sectors written

write-ios: int (optional)
    writes completed

write-merges: int (optional)
    write requests merged

discard-sectors: int (optional)
    sectors discarded

discard-ios: int (optional)
    discards completed successfully

discard-merges: int (optional)
    discard requests merged

flush-ios: int (optional)
    flush requests completed successfully

read-ticks: int (optional)
    time spent reading(ms)

write-ticks: int (optional)
    time spent writing(ms)

discard-ticks: int (optional)
    time spent discarding(ms)

flush-ticks: int (optional)
    time spent flushing(ms)

ios-pgr: int (optional)
    number of I/Os currently in flight

total-ticks: int (optional)
    time spent doing I/Os (ms)

weight-ticks: int (optional)
    weighted time spent doing I/Os since the last update of this field(ms)

  Since

7.1

  GuestDiskStatsInfo (Object)

  Members

name: string
    disk name

major: int
    major device number of disk

minor: int
    minor device number of disk

stats: GuestDiskStats
    I/O statistics

  guest-get-diskstats (Command)

Retrieve information about disk stats.

  Returns

List of disk stats of guest.

  Since

7.1

  GuestCpuStatsType (Enum)

Guest operating systems supporting CPU statistics

  Values

linux
    Linux

  Since

7.1

  GuestLinuxCpuStats (Object)

CPU statistics of Linux

  Members

cpu: int
    CPU index in guest OS

user: int
    Time spent in user mode

nice: int
    Time spent in user mode with low priority (nice)

system: int
    Time spent in system mode

idle: int
    Time spent in the idle task

iowait: int (optional)
    Time waiting for I/O to complete (since Linux 2.5.41)

irq: int (optional)
    Time servicing interrupts (since Linux 2.6.0-test4)

softirq: int (optional)
    Time servicing softirqs (since Linux 2.6.0-test4)

steal: int (optional)
    Stolen time by host (since Linux 2.6.11)

guest: int (optional)
    ime spent running a virtual CPU for guest operating systems under the control of the Linux kernel (since Linux 2.6.24)

guestnice: int (optional)
    Time spent running a niced guest (since Linux 2.6.33)

  Since

7.1

  GuestCpuStats (Object)

Get statistics of each CPU in millisecond.

  Members

type: GuestCpuStatsType
    guest operating system

The members of GuestLinuxCpuStats when type is "linux"

  Since

7.1

  guest-get-cpustats (Command)

Retrieve information about CPU stats.

  Returns

List of CPU stats of guest.

  Since

7.1

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