qemu-ga-ref - Man Page
Name
qemu-ga-ref — QEMU Guest Agent Protocol Reference
Contents
QEMU Guest Agent Protocol Reference
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)
- GuestNetworkRoute (Object)
- guest-network-get-route (Command)
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
If
CONFIG_WIN32 or CONFIG_FSFREEZE
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
If
CONFIG_WIN32 or CONFIG_FSFREEZE
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
If
CONFIG_WIN32 or CONFIG_FSFREEZE
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
If
CONFIG_WIN32 or CONFIG_FSFREEZE
guest-fsfreeze-thaw (Command)
Unfreeze all frozen guest filesystems
Returns
Number of file systems thawed by this call
NOTE:
If the 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
If
CONFIG_WIN32 or CONFIG_FSFREEZE
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
If
CONFIG_WIN32 or CONFIG_FSTRIM
GuestFilesystemTrimResponse (Object)
Members
- paths: array of GuestFilesystemTrimResult
list of GuestFilesystemTrimResult per path that was trimmed
Since
2.4
If
CONFIG_WIN32 or CONFIG_FSTRIM
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
If
CONFIG_WIN32 or CONFIG_FSTRIM
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
- NOTE:
It's strongly recommended to issue the guest-sync command before sending commands when the guest resumes.
Since
1.1
If
CONFIG_LINUX or CONFIG_WIN32
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:
- Wait for the SUSPEND QMP event from QEMU
- Issue the query-status QMP command to confirm the VM status is "suspended"
Errors
- If suspend to ram is not supported, Unsupported
- NOTE:
It's strongly recommended to issue the guest-sync command before sending commands when the guest resumes.
Since
1.1
If
CONFIG_LINUX or CONFIG_WIN32
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:
- Wait for the SUSPEND QMP event from QEMU
- Issue the query-status QMP command to confirm the VM status is "suspended"
Errors
- If hybrid suspend is not supported, Unsupported
- NOTE:
It's strongly recommended to issue the guest-sync command before sending commands when the guest resumes.
Since
1.1
If
CONFIG_LINUX
GuestIpAddressType (Enum)
An enumeration of supported IP address types
Values
- ipv4
IP version 4
- ipv6
IP version 6
Since
1.1
If
CONFIG_WIN32 or HAVE_GETIFADDRS
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
If
CONFIG_WIN32 or HAVE_GETIFADDRS
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
If
CONFIG_WIN32 or HAVE_GETIFADDRS
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
If
CONFIG_WIN32 or HAVE_GETIFADDRS
guest-network-get-interfaces (Command)
Get list of guest IP addresses, MAC addresses and netmasks.
Returns
List of GuestNetworkInterface
Since
1.1
If
CONFIG_WIN32 or HAVE_GETIFADDRS
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
If
CONFIG_LINUX or CONFIG_WIN32
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
If
CONFIG_LINUX or CONFIG_WIN32
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
If
CONFIG_LINUX
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
If
CONFIG_WIN32 or CONFIG_LINUX
GuestPCIAddress (Object)
Members
- domain: int
domain id
- bus: int
bus id
- slot: int
slot id
- function: int
function id
Since
2.2
If
CONFIG_WIN32 or CONFIG_LINUX
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
If
CONFIG_WIN32 or CONFIG_LINUX
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
If
CONFIG_WIN32 or CONFIG_LINUX
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
If
CONFIG_WIN32 or CONFIG_LIBUDEV
GuestDiskSmart (Object)
Disk type related smart information.
Members
- type: GuestDiskBusType
disk bus type
The members of GuestNVMeSmart when type is "nvme"
Since
7.1
If
CONFIG_WIN32 or CONFIG_LIBUDEV
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
If
CONFIG_WIN32 or CONFIG_LIBUDEV
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
If
CONFIG_WIN32 or CONFIG_LIBUDEV
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)
filesystem capacity in bytes for unprivileged users (since 3.0)
- total-bytes-privileged: int (optional)
filesystem capacity in bytes for privileged users (since 9.1)
- 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
If
CONFIG_WIN32 or CONFIG_LINUX
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
If
CONFIG_WIN32 or CONFIG_LINUX
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
If
CONFIG_WIN32 or CONFIG_LINUX or CONFIG_FREEBSD
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
guest-get-memory-block-info (Command)
Get information relating to guest memory blocks.
Returns
GuestMemoryBlockInfo
Since
2.3
If
CONFIG_LINUX
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
If
CONFIG_WIN32 or HAVE_UTMPX
guest-get-users (Command)
Retrieves a list of currently active users on the VM.
Returns
A unique list of users.
Since
2.10
If
CONFIG_WIN32 or HAVE_UTMPX
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"
- NOTE:
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
If
CONFIG_WIN32
GuestDeviceIdPCI (Object)
Members
- vendor-id: int
vendor ID
- device-id: int
device ID
Since
5.2
If
CONFIG_WIN32
GuestDeviceId (Object)
Id of the device
Members
- type: GuestDeviceType
device type
The members of GuestDeviceIdPCI when type is "pci"
Since
5.2
If
CONFIG_WIN32
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
If
CONFIG_WIN32
guest-get-devices (Command)
Retrieve information about device drivers in Windows guest
Returns
GuestDeviceInfo
Since
5.2
If
CONFIG_WIN32
GuestAuthorizedKeys (Object)
Members
- keys: array of string
public keys (in OpenSSH/sshd(8) authorized_keys format)
Since
5.2
Arguments
- username: string
the user account to add the authorized keys
Returns
GuestAuthorizedKeys
Since
5.2
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
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
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
guest-get-diskstats (Command)
Retrieve information about disk stats.
Returns
List of disk stats of guest.
Since
7.1
If
CONFIG_LINUX
GuestCpuStatsType (Enum)
Guest operating systems supporting CPU statistics
Values
- linux
Linux
Since
7.1
If
CONFIG_LINUX
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
If
CONFIG_LINUX
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
If
CONFIG_LINUX
guest-get-cpustats (Command)
Retrieve information about CPU stats.
Returns
List of CPU stats of guest.
Since
7.1
If
CONFIG_LINUX
GuestNetworkRoute (Object)
Route information, currently, only linux supported.
Members
- iface: string
The destination network or host's egress network interface in the routing table
- destination: string
The IP address of the target network or host, The final destination of the packet
- metric: int
Route metric
- gateway: string (optional)
The IP address of the next hop router
- mask: string (optional)
Subnet Mask (IPv4 only)
- irtt: int (optional)
Initial round-trip delay (not for windows, IPv4 only)
- flags: int (optional)
Route flags (not for windows)
- refcnt: int (optional)
The route's reference count (not for windows)
- use: int (optional)
Route usage count (not for windows)
- window: int (optional)
TCP window size, used for flow control (not for windows, IPv4 only)
- mtu: int (optional)
Data link layer maximum packet size (not for windows)
- desprefixlen: string (optional)
Destination prefix length (for IPv6)
- source: string (optional)
Source IP address (for IPv6)
- srcprefixlen: string (optional)
Source prefix length (for IPv6)
- nexthop: string (optional)
Next hop IP address (for IPv6)
- version: int
IP version (4 or 6)
Since
9.1
If
CONFIG_LINUX
guest-network-get-route (Command)
Retrieve information about route of network. Returns: List of route info of guest.
Since
9.1
If
CONFIG_LINUX
Copyright
2024, The QEMU Project Developers