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diff --git a/docs/qmp-commands.txt b/docs/qmp-commands.txt deleted file mode 100644 index abf210a596..0000000000 --- a/docs/qmp-commands.txt +++ /dev/null @@ -1,3824 +0,0 @@ - QMP Supported Commands - ---------------------- - -This document describes all commands currently supported by QMP. - -Most of the time their usage is exactly the same as in the user Monitor, this -means that any other document which also describe commands (the manpage, -QEMU's manual, etc) can and should be consulted. - -QMP has two types of commands: regular and query commands. Regular commands -usually change the Virtual Machine's state someway, while query commands just -return information. The sections below are divided accordingly. - -It's important to observe that all communication examples are formatted in -a reader-friendly way, so that they're easier to understand. However, in real -protocol usage, they're emitted as a single line. - -Also, the following notation is used to denote data flow: - --> data issued by the Client -<- Server data response - -Please, refer to the QMP specification (docs/qmp-spec.txt) for detailed -information on the Server command and response formats. - -NOTE: This document is temporary and will be replaced soon. - -1. Stability Considerations -=========================== - -The current QMP command set (described in this file) may be useful for a -number of use cases, however it's limited and several commands have bad -defined semantics, specially with regard to command completion. - -These problems are going to be solved incrementally in the next QEMU releases -and we're going to establish a deprecation policy for badly defined commands. - -If you're planning to adopt QMP, please observe the following: - - 1. The deprecation policy will take effect and be documented soon, please - check the documentation of each used command as soon as a new release of - QEMU is available - - 2. DO NOT rely on anything which is not explicit documented - - 3. Errors, in special, are not documented. Applications should NOT check - for specific errors classes or data (it's strongly recommended to only - check for the "error" key) - -2. Regular Commands -=================== - -Server's responses in the examples below are always a success response, please -refer to the QMP specification for more details on error responses. - -quit ----- - -Quit the emulator. - -Arguments: None. - -Example: - --> { "execute": "quit" } -<- { "return": {} } - -eject ------ - -Eject a removable medium. - -Arguments: - -- "force": force ejection (json-bool, optional) -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) - -Example: - --> { "execute": "eject", "arguments": { "id": "ide0-1-0" } } -<- { "return": {} } - -Note: The "force" argument defaults to false. - -change ------- - -Change a removable medium or VNC configuration. - -Arguments: - -- "device": device name (json-string) -- "target": filename or item (json-string) -- "arg": additional argument (json-string, optional) - -Examples: - -1. Change a removable medium - --> { "execute": "change", - "arguments": { "device": "ide1-cd0", - "target": "/srv/images/Fedora-12-x86_64-DVD.iso" } } -<- { "return": {} } - -2. Change VNC password - --> { "execute": "change", - "arguments": { "device": "vnc", "target": "password", - "arg": "foobar1" } } -<- { "return": {} } - -screendump ----------- - -Save screen into PPM image. - -Arguments: - -- "filename": file path (json-string) - -Example: - --> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } } -<- { "return": {} } - -stop ----- - -Stop the emulator. - -Arguments: None. - -Example: - --> { "execute": "stop" } -<- { "return": {} } - -cont ----- - -Resume emulation. - -Arguments: None. - -Example: - --> { "execute": "cont" } -<- { "return": {} } - -system_wakeup -------------- - -Wakeup guest from suspend. - -Arguments: None. - -Example: - --> { "execute": "system_wakeup" } -<- { "return": {} } - -system_reset ------------- - -Reset the system. - -Arguments: None. - -Example: - --> { "execute": "system_reset" } -<- { "return": {} } - -system_powerdown ----------------- - -Send system power down event. - -Arguments: None. - -Example: - --> { "execute": "system_powerdown" } -<- { "return": {} } - -device_add ----------- - -Add a device. - -Arguments: - -- "driver": the name of the new device's driver (json-string) -- "bus": the device's parent bus (device tree path, json-string, optional) -- "id": the device's ID, must be unique (json-string) -- device properties - -Example: - --> { "execute": "device_add", "arguments": { "driver": "e1000", "id": "net1" } } -<- { "return": {} } - -Notes: - -(1) For detailed information about this command, please refer to the - 'docs/qdev-device-use.txt' file. - -(2) It's possible to list device properties by running QEMU with the - "-device DEVICE,\?" command-line argument, where DEVICE is the device's name - -device_del ----------- - -Remove a device. - -Arguments: - -- "id": the device's ID or QOM path (json-string) - -Example: - --> { "execute": "device_del", "arguments": { "id": "net1" } } -<- { "return": {} } - -Example: - --> { "execute": "device_del", "arguments": { "id": "/machine/peripheral-anon/device[0]" } } -<- { "return": {} } - -send-key ----------- - -Send keys to VM. - -Arguments: - -keys array: - - "key": key sequence (a json-array of key union values, - union can be number or qcode enum) - -- hold-time: time to delay key up events, milliseconds. Defaults to 100 - (json-int, optional) - -Example: - --> { "execute": "send-key", - "arguments": { "keys": [ { "type": "qcode", "data": "ctrl" }, - { "type": "qcode", "data": "alt" }, - { "type": "qcode", "data": "delete" } ] } } -<- { "return": {} } - -cpu ---- - -Set the default CPU. - -Arguments: - -- "index": the CPU's index (json-int) - -Example: - --> { "execute": "cpu", "arguments": { "index": 0 } } -<- { "return": {} } - -Note: CPUs' indexes are obtained with the 'query-cpus' command. - -cpu-add -------- - -Adds virtual cpu - -Arguments: - -- "id": cpu id (json-int) - -Example: - --> { "execute": "cpu-add", "arguments": { "id": 2 } } -<- { "return": {} } - -memsave -------- - -Save to disk virtual memory dump starting at 'val' of size 'size'. - -Arguments: - -- "val": the starting address (json-int) -- "size": the memory size, in bytes (json-int) -- "filename": file path (json-string) -- "cpu": virtual CPU index (json-int, optional) - -Example: - --> { "execute": "memsave", - "arguments": { "val": 10, - "size": 100, - "filename": "/tmp/virtual-mem-dump" } } -<- { "return": {} } - -pmemsave --------- - -Save to disk physical memory dump starting at 'val' of size 'size'. - -Arguments: - -- "val": the starting address (json-int) -- "size": the memory size, in bytes (json-int) -- "filename": file path (json-string) - -Example: - --> { "execute": "pmemsave", - "arguments": { "val": 10, - "size": 100, - "filename": "/tmp/physical-mem-dump" } } -<- { "return": {} } - -inject-nmi ----------- - -Inject an NMI on the default CPU (x86/s390) or all CPUs (ppc64). - -Arguments: None. - -Example: - --> { "execute": "inject-nmi" } -<- { "return": {} } - -Note: inject-nmi fails when the guest doesn't support injecting. - -ringbuf-write -------------- - -Write to a ring buffer character device. - -Arguments: - -- "device": ring buffer character device name (json-string) -- "data": data to write (json-string) -- "format": data format (json-string, optional) - - Possible values: "utf8" (default), "base64" - -Example: - --> { "execute": "ringbuf-write", - "arguments": { "device": "foo", - "data": "abcdefgh", - "format": "utf8" } } -<- { "return": {} } - -ringbuf-read -------------- - -Read from a ring buffer character device. - -Arguments: - -- "device": ring buffer character device name (json-string) -- "size": how many bytes to read at most (json-int) - - Number of data bytes, not number of characters in encoded data -- "format": data format (json-string, optional) - - Possible values: "utf8" (default), "base64" - - Naturally, format "utf8" works only when the ring buffer - contains valid UTF-8 text. Invalid UTF-8 sequences get - replaced. Bug: replacement doesn't work. Bug: can screw - up on encountering NUL characters, after the ring buffer - lost data, and when reading stops because the size limit - is reached. - -Example: - --> { "execute": "ringbuf-read", - "arguments": { "device": "foo", - "size": 1000, - "format": "utf8" } } -<- {"return": "abcdefgh"} - -xen-save-devices-state -------- - -Save the state of all devices to file. The RAM and the block devices -of the VM are not saved by this command. - -Arguments: - -- "filename": the file to save the state of the devices to as binary -data. See xen-save-devices-state.txt for a description of the binary -format. - -Example: - --> { "execute": "xen-save-devices-state", - "arguments": { "filename": "/tmp/save" } } -<- { "return": {} } - -xen-load-devices-state ----------------------- - -Load the state of all devices from file. The RAM and the block devices -of the VM are not loaded by this command. - -Arguments: - -- "filename": the file to load the state of the devices from as binary -data. See xen-save-devices-state.txt for a description of the binary -format. - -Example: - --> { "execute": "xen-load-devices-state", - "arguments": { "filename": "/tmp/resume" } } -<- { "return": {} } - -xen-set-global-dirty-log -------- - -Enable or disable the global dirty log mode. - -Arguments: - -- "enable": Enable it or disable it. - -Example: - --> { "execute": "xen-set-global-dirty-log", - "arguments": { "enable": true } } -<- { "return": {} } - -migrate -------- - -Migrate to URI. - -Arguments: - -- "blk": block migration, full disk copy (json-bool, optional) -- "inc": incremental disk copy (json-bool, optional) -- "uri": Destination URI (json-string) - -Example: - --> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } } -<- { "return": {} } - -Notes: - -(1) The 'query-migrate' command should be used to check migration's progress - and final result (this information is provided by the 'status' member) -(2) All boolean arguments default to false -(3) The user Monitor's "detach" argument is invalid in QMP and should not - be used - -migrate_cancel --------------- - -Cancel the current migration. - -Arguments: None. - -Example: - --> { "execute": "migrate_cancel" } -<- { "return": {} } - -migrate-incoming ----------------- - -Continue an incoming migration - -Arguments: - -- "uri": Source/listening URI (json-string) - -Example: - --> { "execute": "migrate-incoming", "arguments": { "uri": "tcp::4446" } } -<- { "return": {} } - -Notes: - -(1) QEMU must be started with -incoming defer to allow migrate-incoming to - be used -(2) The uri format is the same as for -incoming - -migrate-set-cache-size ----------------------- - -Set cache size to be used by XBZRLE migration, the cache size will be rounded -down to the nearest power of 2 - -Arguments: - -- "value": cache size in bytes (json-int) - -Example: - --> { "execute": "migrate-set-cache-size", "arguments": { "value": 536870912 } } -<- { "return": {} } - -migrate-start-postcopy ----------------------- - -Switch an in-progress migration to postcopy mode. Ignored after the end of -migration (or once already in postcopy). - -Example: --> { "execute": "migrate-start-postcopy" } -<- { "return": {} } - -query-migrate-cache-size ------------------------- - -Show cache size to be used by XBZRLE migration - -returns a json-object with the following information: -- "size" : json-int - -Example: - --> { "execute": "query-migrate-cache-size" } -<- { "return": 67108864 } - -migrate_set_speed ------------------ - -Set maximum speed for migrations. - -Arguments: - -- "value": maximum speed, in bytes per second (json-int) - -Example: - --> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } } -<- { "return": {} } - -migrate_set_downtime --------------------- - -Set maximum tolerated downtime (in seconds) for migrations. - -Arguments: - -- "value": maximum downtime (json-number) - -Example: - --> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } } -<- { "return": {} } - -x-colo-lost-heartbeat --------------------- - -Tell COLO that heartbeat is lost, a failover or takeover is needed. - -Example: - --> { "execute": "x-colo-lost-heartbeat" } -<- { "return": {} } - -client_migrate_info -------------------- - -Set migration information for remote display. This makes the server -ask the client to automatically reconnect using the new parameters -once migration finished successfully. Only implemented for SPICE. - -Arguments: - -- "protocol": must be "spice" (json-string) -- "hostname": migration target hostname (json-string) -- "port": spice tcp port for plaintext channels (json-int, optional) -- "tls-port": spice tcp port for tls-secured channels (json-int, optional) -- "cert-subject": server certificate subject (json-string, optional) - -Example: - --> { "execute": "client_migrate_info", - "arguments": { "protocol": "spice", - "hostname": "virt42.lab.kraxel.org", - "port": 1234 } } -<- { "return": {} } - -dump - - -Dump guest memory to file. The file can be processed with crash or gdb. - -Arguments: - -- "paging": do paging to get guest's memory mapping (json-bool) -- "protocol": destination file(started with "file:") or destination file - descriptor (started with "fd:") (json-string) -- "detach": if specified, command will return immediately, without waiting - for the dump to finish. The user can track progress using - "query-dump". (json-bool) -- "begin": the starting physical address. It's optional, and should be specified - with length together (json-int) -- "length": the memory size, in bytes. It's optional, and should be specified - with begin together (json-int) -- "format": the format of guest memory dump. It's optional, and can be - elf|kdump-zlib|kdump-lzo|kdump-snappy, but non-elf formats will - conflict with paging and filter, ie. begin and length (json-string) - -Example: - --> { "execute": "dump-guest-memory", "arguments": { "protocol": "fd:dump" } } -<- { "return": {} } - -Notes: - -(1) All boolean arguments default to false - -query-dump-guest-memory-capability ----------- - -Show available formats for 'dump-guest-memory' - -Example: - --> { "execute": "query-dump-guest-memory-capability" } -<- { "return": { "formats": - ["elf", "kdump-zlib", "kdump-lzo", "kdump-snappy"] } - -query-dump ----------- - -Query background dump status. - -Arguments: None. - -Example: - --> { "execute": "query-dump" } -<- { "return": { "status": "active", "completed": 1024000, - "total": 2048000 } } - -dump-skeys ----------- - -Save guest storage keys to file. - -Arguments: - -- "filename": file path (json-string) - -Example: - --> { "execute": "dump-skeys", "arguments": { "filename": "/tmp/skeys" } } -<- { "return": {} } - -netdev_add ----------- - -Add host network device. - -Arguments: - -- "type": the device type, "tap", "user", ... (json-string) -- "id": the device's ID, must be unique (json-string) -- device options - -Example: - --> { "execute": "netdev_add", - "arguments": { "type": "user", "id": "netdev1", - "dnssearch": "example.org" } } -<- { "return": {} } - -Note: The supported device options are the same ones supported by the '-netdev' - command-line argument, which are listed in the '-help' output or QEMU's - manual - -netdev_del ----------- - -Remove host network device. - -Arguments: - -- "id": the device's ID, must be unique (json-string) - -Example: - --> { "execute": "netdev_del", "arguments": { "id": "netdev1" } } -<- { "return": {} } - - -object-add ----------- - -Create QOM object. - -Arguments: - -- "qom-type": the object's QOM type, i.e. the class name (json-string) -- "id": the object's ID, must be unique (json-string) -- "props": a dictionary of object property values (optional, json-dict) - -Example: - --> { "execute": "object-add", "arguments": { "qom-type": "rng-random", "id": "rng1", - "props": { "filename": "/dev/hwrng" } } } -<- { "return": {} } - -object-del ----------- - -Remove QOM object. - -Arguments: - -- "id": the object's ID (json-string) - -Example: - --> { "execute": "object-del", "arguments": { "id": "rng1" } } -<- { "return": {} } - - -block_resize ------------- - -Resize a block image while a guest is running. - -Arguments: - -- "device": the device's ID, must be unique (json-string) -- "node-name": the node name in the block driver state graph (json-string) -- "size": new size - -Example: - --> { "execute": "block_resize", "arguments": { "device": "scratch", "size": 1073741824 } } -<- { "return": {} } - -block-stream ------------- - -Copy data from a backing file into a block device. - -Arguments: - -- "job-id": Identifier for the newly-created block job. If omitted, - the device name will be used. (json-string, optional) -- "device": The device name or node-name of a root node (json-string) -- "base": The file name of the backing image above which copying starts. - It cannot be set if 'base-node' is also set (json-string, optional) -- "base-node": the node name of the backing image above which copying starts. - It cannot be set if 'base' is also set. - (json-string, optional) (Since 2.8) -- "backing-file": The backing file string to write into the active layer. This - filename is not validated. - - If a pathname string is such that it cannot be resolved by - QEMU, that means that subsequent QMP or HMP commands must use - node-names for the image in question, as filename lookup - methods will fail. - - If not specified, QEMU will automatically determine the - backing file string to use, or error out if there is no - obvious choice. Care should be taken when specifying the - string, to specify a valid filename or protocol. - (json-string, optional) (Since 2.1) -- "speed": the maximum speed, in bytes per second (json-int, optional) -- "on-error": the action to take on an error (default 'report'). 'stop' and - 'enospc' can only be used if the block device supports io-status. - (json-string, optional) (Since 2.1) - -Example: - --> { "execute": "block-stream", "arguments": { "device": "virtio0", - "base": "/tmp/master.qcow2" } } -<- { "return": {} } - -block-commit ------------- - -Live commit of data from overlay image nodes into backing nodes - i.e., writes -data between 'top' and 'base' into 'base'. - -Arguments: - -- "job-id": Identifier for the newly-created block job. If omitted, - the device name will be used. (json-string, optional) -- "device": The device name or node-name of a root node (json-string) -- "base": The file name of the backing image to write data into. - If not specified, this is the deepest backing image - (json-string, optional) -- "top": The file name of the backing image within the image chain, - which contains the topmost data to be committed down. If - not specified, this is the active layer. (json-string, optional) - -- backing-file: The backing file string to write into the overlay - image of 'top'. If 'top' is the active layer, - specifying a backing file string is an error. This - filename is not validated. - - If a pathname string is such that it cannot be - resolved by QEMU, that means that subsequent QMP or - HMP commands must use node-names for the image in - question, as filename lookup methods will fail. - - If not specified, QEMU will automatically determine - the backing file string to use, or error out if - there is no obvious choice. Care should be taken - when specifying the string, to specify a valid - filename or protocol. - (json-string, optional) (Since 2.1) - - If top == base, that is an error. - If top == active, the job will not be completed by itself, - user needs to complete the job with the block-job-complete - command after getting the ready event. (Since 2.0) - - If the base image is smaller than top, then the base image - will be resized to be the same size as top. If top is - smaller than the base image, the base will not be - truncated. If you want the base image size to match the - size of the smaller top, you can safely truncate it - yourself once the commit operation successfully completes. - (json-string) -- "speed": the maximum speed, in bytes per second (json-int, optional) - - -Example: - --> { "execute": "block-commit", "arguments": { "device": "virtio0", - "top": "/tmp/snap1.qcow2" } } -<- { "return": {} } - -drive-backup ------------- - -Start a point-in-time copy of a block device to a new destination. The -status of ongoing drive-backup operations can be checked with -query-block-jobs where the BlockJobInfo.type field has the value 'backup'. -The operation can be stopped before it has completed using the -block-job-cancel command. - -Arguments: - -- "job-id": Identifier for the newly-created block job. If omitted, - the device name will be used. (json-string, optional) -- "device": the device name or node-name of a root node which should be copied. - (json-string) -- "target": the target of the new image. If the file exists, or if it is a - device, the existing file/device will be used as the new - destination. If it does not exist, a new file will be created. - (json-string) -- "format": the format of the new destination, default is to probe if 'mode' is - 'existing', else the format of the source - (json-string, optional) -- "sync": what parts of the disk image should be copied to the destination; - possibilities include "full" for all the disk, "top" for only the sectors - allocated in the topmost image, "incremental" for only the dirty sectors in - the bitmap, or "none" to only replicate new I/O (MirrorSyncMode). -- "bitmap": dirty bitmap name for sync==incremental. Must be present if sync - is "incremental", must NOT be present otherwise. -- "mode": whether and how QEMU should create a new image - (NewImageMode, optional, default 'absolute-paths') -- "speed": the maximum speed, in bytes per second (json-int, optional) -- "compress": true to compress data, if the target format supports it. - (json-bool, optional, default false) -- "on-source-error": the action to take on an error on the source, default - 'report'. 'stop' and 'enospc' can only be used - if the block device supports io-status. - (BlockdevOnError, optional) -- "on-target-error": the action to take on an error on the target, default - 'report' (no limitations, since this applies to - a different block device than device). - (BlockdevOnError, optional) - -Example: --> { "execute": "drive-backup", "arguments": { "device": "drive0", - "sync": "full", - "target": "backup.img" } } -<- { "return": {} } - -blockdev-backup ---------------- - -The device version of drive-backup: this command takes an existing named device -as backup target. - -Arguments: - -- "job-id": Identifier for the newly-created block job. If omitted, - the device name will be used. (json-string, optional) -- "device": the device name or node-name of a root node which should be copied. - (json-string) -- "target": the name of the backup target device. (json-string) -- "sync": what parts of the disk image should be copied to the destination; - possibilities include "full" for all the disk, "top" for only the - sectors allocated in the topmost image, or "none" to only replicate - new I/O (MirrorSyncMode). -- "speed": the maximum speed, in bytes per second (json-int, optional) -- "compress": true to compress data, if the target format supports it. - (json-bool, optional, default false) -- "on-source-error": the action to take on an error on the source, default - 'report'. 'stop' and 'enospc' can only be used - if the block device supports io-status. - (BlockdevOnError, optional) -- "on-target-error": the action to take on an error on the target, default - 'report' (no limitations, since this applies to - a different block device than device). - (BlockdevOnError, optional) - -Example: --> { "execute": "blockdev-backup", "arguments": { "device": "src-id", - "sync": "full", - "target": "tgt-id" } } -<- { "return": {} } - -transaction ------------ - -Atomically operate on one or more block devices. Operations that are -currently supported: - - - drive-backup - - blockdev-backup - - blockdev-snapshot-sync - - blockdev-snapshot-internal-sync - - abort - - block-dirty-bitmap-add - - block-dirty-bitmap-clear - -Refer to the qemu/qapi-schema.json file for minimum required QEMU -versions for these operations. A list of dictionaries is accepted, -that contains the actions to be performed. If there is any failure -performing any of the operations, all operations for the group are -abandoned. - -For external snapshots, the dictionary contains the device, the file to use for -the new snapshot, and the format. The default format, if not specified, is -qcow2. - -Each new snapshot defaults to being created by QEMU (wiping any -contents if the file already exists), but it is also possible to reuse -an externally-created file. In the latter case, you should ensure that -the new image file has the same contents as the current one; QEMU cannot -perform any meaningful check. Typically this is achieved by using the -current image file as the backing file for the new image. - -On failure, the original disks pre-snapshot attempt will be used. - -For internal snapshots, the dictionary contains the device and the snapshot's -name. If an internal snapshot matching name already exists, the request will -be rejected. Only some image formats support it, for example, qcow2, rbd, -and sheepdog. - -On failure, qemu will try delete the newly created internal snapshot in the -transaction. When an I/O error occurs during deletion, the user needs to fix -it later with qemu-img or other command. - -Arguments: - -actions array: - - "type": the operation to perform (json-string). Possible - values: "drive-backup", "blockdev-backup", - "blockdev-snapshot-sync", - "blockdev-snapshot-internal-sync", - "abort", "block-dirty-bitmap-add", - "block-dirty-bitmap-clear" - - "data": a dictionary. The contents depend on the value - of "type". When "type" is "blockdev-snapshot-sync": - - "device": device name to snapshot (json-string) - - "node-name": graph node name to snapshot (json-string) - - "snapshot-file": name of new image file (json-string) - - "snapshot-node-name": graph node name of the new snapshot (json-string) - - "format": format of new image (json-string, optional) - - "mode": whether and how QEMU should create the snapshot file - (NewImageMode, optional, default "absolute-paths") - When "type" is "blockdev-snapshot-internal-sync": - - "device": the device name or node-name of a root node to snapshot - (json-string) - - "name": name of the new snapshot (json-string) - -Example: - --> { "execute": "transaction", - "arguments": { "actions": [ - { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd0", - "snapshot-file": "/some/place/my-image", - "format": "qcow2" } }, - { "type": "blockdev-snapshot-sync", "data" : { "node-name": "myfile", - "snapshot-file": "/some/place/my-image2", - "snapshot-node-name": "node3432", - "mode": "existing", - "format": "qcow2" } }, - { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd1", - "snapshot-file": "/some/place/my-image2", - "mode": "existing", - "format": "qcow2" } }, - { "type": "blockdev-snapshot-internal-sync", "data" : { - "device": "ide-hd2", - "name": "snapshot0" } } ] } } -<- { "return": {} } - -block-dirty-bitmap-add ----------------------- -Since 2.4 - -Create a dirty bitmap with a name on the device, and start tracking the writes. - -Arguments: - -- "node": device/node on which to create dirty bitmap (json-string) -- "name": name of the new dirty bitmap (json-string) -- "granularity": granularity to track writes with (int, optional) - -Example: - --> { "execute": "block-dirty-bitmap-add", "arguments": { "node": "drive0", - "name": "bitmap0" } } -<- { "return": {} } - -block-dirty-bitmap-remove -------------------------- -Since 2.4 - -Stop write tracking and remove the dirty bitmap that was created with -block-dirty-bitmap-add. - -Arguments: - -- "node": device/node on which to remove dirty bitmap (json-string) -- "name": name of the dirty bitmap to remove (json-string) - -Example: - --> { "execute": "block-dirty-bitmap-remove", "arguments": { "node": "drive0", - "name": "bitmap0" } } -<- { "return": {} } - -block-dirty-bitmap-clear ------------------------- -Since 2.4 - -Reset the dirty bitmap associated with a node so that an incremental backup -from this point in time forward will only backup clusters modified after this -clear operation. - -Arguments: - -- "node": device/node on which to remove dirty bitmap (json-string) -- "name": name of the dirty bitmap to remove (json-string) - -Example: - --> { "execute": "block-dirty-bitmap-clear", "arguments": { "node": "drive0", - "name": "bitmap0" } } -<- { "return": {} } - -blockdev-snapshot-sync ----------------------- - -Synchronous snapshot of a block device. snapshot-file specifies the -target of the new image. If the file exists, or if it is a device, the -snapshot will be created in the existing file/device. If does not -exist, a new file will be created. format specifies the format of the -snapshot image, default is qcow2. - -Arguments: - -- "device": device name to snapshot (json-string) -- "node-name": graph node name to snapshot (json-string) -- "snapshot-file": name of new image file (json-string) -- "snapshot-node-name": graph node name of the new snapshot (json-string) -- "mode": whether and how QEMU should create the snapshot file - (NewImageMode, optional, default "absolute-paths") -- "format": format of new image (json-string, optional) - -Example: - --> { "execute": "blockdev-snapshot-sync", "arguments": { "device": "ide-hd0", - "snapshot-file": - "/some/place/my-image", - "format": "qcow2" } } -<- { "return": {} } - -blockdev-snapshot ------------------ -Since 2.5 - -Create a snapshot, by installing 'node' as the backing image of -'overlay'. Additionally, if 'node' is associated with a block -device, the block device changes to using 'overlay' as its new active -image. - -Arguments: - -- "node": device that will have a snapshot created (json-string) -- "overlay": device that will have 'node' as its backing image (json-string) - -Example: - --> { "execute": "blockdev-add", - "arguments": { "driver": "qcow2", - "node-name": "node1534", - "file": { "driver": "file", - "filename": "hd1.qcow2" }, - "backing": "" } } - -<- { "return": {} } - --> { "execute": "blockdev-snapshot", "arguments": { "node": "ide-hd0", - "overlay": "node1534" } } -<- { "return": {} } - -blockdev-snapshot-internal-sync -------------------------------- - -Synchronously take an internal snapshot of a block device when the format of -image used supports it. If the name is an empty string, or a snapshot with -name already exists, the operation will fail. - -Arguments: - -- "device": the device name or node-name of a root node to snapshot - (json-string) -- "name": name of the new snapshot (json-string) - -Example: - --> { "execute": "blockdev-snapshot-internal-sync", - "arguments": { "device": "ide-hd0", - "name": "snapshot0" } - } -<- { "return": {} } - -blockdev-snapshot-delete-internal-sync --------------------------------------- - -Synchronously delete an internal snapshot of a block device when the format of -image used supports it. The snapshot is identified by name or id or both. One -of name or id is required. If the snapshot is not found, the operation will -fail. - -Arguments: - -- "device": the device name or node-name of a root node (json-string) -- "id": ID of the snapshot (json-string, optional) -- "name": name of the snapshot (json-string, optional) - -Example: - --> { "execute": "blockdev-snapshot-delete-internal-sync", - "arguments": { "device": "ide-hd0", - "name": "snapshot0" } - } -<- { "return": { - "id": "1", - "name": "snapshot0", - "vm-state-size": 0, - "date-sec": 1000012, - "date-nsec": 10, - "vm-clock-sec": 100, - "vm-clock-nsec": 20 - } - } - -drive-mirror ------------- - -Start mirroring a block device's writes to a new destination. target -specifies the target of the new image. If the file exists, or if it is -a device, it will be used as the new destination for writes. If it does not -exist, a new file will be created. format specifies the format of the -mirror image, default is to probe if mode='existing', else the format -of the source. - -Arguments: - -- "job-id": Identifier for the newly-created block job. If omitted, - the device name will be used. (json-string, optional) -- "device": the device name or node-name of a root node whose writes should be - mirrored. (json-string) -- "target": name of new image file (json-string) -- "format": format of new image (json-string, optional) -- "node-name": the name of the new block driver state in the node graph - (json-string, optional) -- "replaces": the block driver node name to replace when finished - (json-string, optional) -- "mode": how an image file should be created into the target - file/device (NewImageMode, optional, default 'absolute-paths') -- "speed": maximum speed of the streaming job, in bytes per second - (json-int) -- "granularity": granularity of the dirty bitmap, in bytes (json-int, optional) -- "buf-size": maximum amount of data in flight from source to target, in bytes - (json-int, default 10M) -- "sync": what parts of the disk image should be copied to the destination; - possibilities include "full" for all the disk, "top" for only the sectors - allocated in the topmost image, or "none" to only replicate new I/O - (MirrorSyncMode). -- "on-source-error": the action to take on an error on the source - (BlockdevOnError, default 'report') -- "on-target-error": the action to take on an error on the target - (BlockdevOnError, default 'report') -- "unmap": whether the target sectors should be discarded where source has only - zeroes. (json-bool, optional, default true) - -The default value of the granularity is the image cluster size clamped -between 4096 and 65536, if the image format defines one. If the format -does not define a cluster size, the default value of the granularity -is 65536. - - -Example: - --> { "execute": "drive-mirror", "arguments": { "device": "ide-hd0", - "target": "/some/place/my-image", - "sync": "full", - "format": "qcow2" } } -<- { "return": {} } - -blockdev-mirror ------------- - -Start mirroring a block device's writes to another block device. target -specifies the target of mirror operation. - -Arguments: - -- "job-id": Identifier for the newly-created block job. If omitted, - the device name will be used. (json-string, optional) -- "device": The device name or node-name of a root node whose writes should be - mirrored (json-string) -- "target": device name to mirror to (json-string) -- "replaces": the block driver node name to replace when finished - (json-string, optional) -- "speed": maximum speed of the streaming job, in bytes per second - (json-int) -- "granularity": granularity of the dirty bitmap, in bytes (json-int, optional) -- "buf_size": maximum amount of data in flight from source to target, in bytes - (json-int, default 10M) -- "sync": what parts of the disk image should be copied to the destination; - possibilities include "full" for all the disk, "top" for only the sectors - allocated in the topmost image, or "none" to only replicate new I/O - (MirrorSyncMode). -- "on-source-error": the action to take on an error on the source - (BlockdevOnError, default 'report') -- "on-target-error": the action to take on an error on the target - (BlockdevOnError, default 'report') - -The default value of the granularity is the image cluster size clamped -between 4096 and 65536, if the image format defines one. If the format -does not define a cluster size, the default value of the granularity -is 65536. - -Example: - --> { "execute": "blockdev-mirror", "arguments": { "device": "ide-hd0", - "target": "target0", - "sync": "full" } } -<- { "return": {} } - -change-backing-file -------------------- -Since: 2.1 - -Change the backing file in the image file metadata. This does not cause -QEMU to reopen the image file to reparse the backing filename (it may, -however, perform a reopen to change permissions from r/o -> r/w -> r/o, -if needed). The new backing file string is written into the image file -metadata, and the QEMU internal strings are updated. - -Arguments: - -- "image-node-name": The name of the block driver state node of the - image to modify. The "device" is argument is used to - verify "image-node-name" is in the chain described by - "device". - (json-string, optional) - -- "device": The device name or node-name of the root node that owns - image-node-name. - (json-string) - -- "backing-file": The string to write as the backing file. This string is - not validated, so care should be taken when specifying - the string or the image chain may not be able to be - reopened again. - (json-string) - -Returns: Nothing on success - If "device" does not exist or cannot be determined, DeviceNotFound - -balloon -------- - -Request VM to change its memory allocation (in bytes). - -Arguments: - -- "value": New memory allocation (json-int) - -Example: - --> { "execute": "balloon", "arguments": { "value": 536870912 } } -<- { "return": {} } - -set_link --------- - -Change the link status of a network adapter. - -Arguments: - -- "name": network device name (json-string) -- "up": status is up (json-bool) - -Example: - --> { "execute": "set_link", "arguments": { "name": "e1000.0", "up": false } } -<- { "return": {} } - -getfd ------ - -Receive a file descriptor via SCM rights and assign it a name. - -Arguments: - -- "fdname": file descriptor name (json-string) - -Example: - --> { "execute": "getfd", "arguments": { "fdname": "fd1" } } -<- { "return": {} } - -Notes: - -(1) If the name specified by the "fdname" argument already exists, - the file descriptor assigned to it will be closed and replaced - by the received file descriptor. -(2) The 'closefd' command can be used to explicitly close the file - descriptor when it is no longer needed. - -closefd -------- - -Close a file descriptor previously passed via SCM rights. - -Arguments: - -- "fdname": file descriptor name (json-string) - -Example: - --> { "execute": "closefd", "arguments": { "fdname": "fd1" } } -<- { "return": {} } - -add-fd -------- - -Add a file descriptor, that was passed via SCM rights, to an fd set. - -Arguments: - -- "fdset-id": The ID of the fd set to add the file descriptor to. - (json-int, optional) -- "opaque": A free-form string that can be used to describe the fd. - (json-string, optional) - -Return a json-object with the following information: - -- "fdset-id": The ID of the fd set that the fd was added to. (json-int) -- "fd": The file descriptor that was received via SCM rights and added to the - fd set. (json-int) - -Example: - --> { "execute": "add-fd", "arguments": { "fdset-id": 1 } } -<- { "return": { "fdset-id": 1, "fd": 3 } } - -Notes: - -(1) The list of fd sets is shared by all monitor connections. -(2) If "fdset-id" is not specified, a new fd set will be created. - -remove-fd ---------- - -Remove a file descriptor from an fd set. - -Arguments: - -- "fdset-id": The ID of the fd set that the file descriptor belongs to. - (json-int) -- "fd": The file descriptor that is to be removed. (json-int, optional) - -Example: - --> { "execute": "remove-fd", "arguments": { "fdset-id": 1, "fd": 3 } } -<- { "return": {} } - -Notes: - -(1) The list of fd sets is shared by all monitor connections. -(2) If "fd" is not specified, all file descriptors in "fdset-id" will be - removed. - -query-fdsets -------------- - -Return information describing all fd sets. - -Arguments: None - -Example: - --> { "execute": "query-fdsets" } -<- { "return": [ - { - "fds": [ - { - "fd": 30, - "opaque": "rdonly:/path/to/file" - }, - { - "fd": 24, - "opaque": "rdwr:/path/to/file" - } - ], - "fdset-id": 1 - }, - { - "fds": [ - { - "fd": 28 - }, - { - "fd": 29 - } - ], - "fdset-id": 0 - } - ] - } - -Note: The list of fd sets is shared by all monitor connections. - -block_passwd ------------- - -Set the password of encrypted block devices. - -Arguments: - -- "device": device name (json-string) -- "node-name": name in the block driver state graph (json-string) -- "password": password (json-string) - -Example: - --> { "execute": "block_passwd", "arguments": { "device": "ide0-hd0", - "password": "12345" } } -<- { "return": {} } - -block_set_io_throttle ------------- - -Change I/O throttle limits for a block drive. - -Arguments: - -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) -- "bps": total throughput limit in bytes per second (json-int) -- "bps_rd": read throughput limit in bytes per second (json-int) -- "bps_wr": write throughput limit in bytes per second (json-int) -- "iops": total I/O operations per second (json-int) -- "iops_rd": read I/O operations per second (json-int) -- "iops_wr": write I/O operations per second (json-int) -- "bps_max": total throughput limit during bursts, in bytes (json-int, optional) -- "bps_rd_max": read throughput limit during bursts, in bytes (json-int, optional) -- "bps_wr_max": write throughput limit during bursts, in bytes (json-int, optional) -- "iops_max": total I/O operations per second during bursts (json-int, optional) -- "iops_rd_max": read I/O operations per second during bursts (json-int, optional) -- "iops_wr_max": write I/O operations per second during bursts (json-int, optional) -- "bps_max_length": maximum length of the @bps_max burst period, in seconds (json-int, optional) -- "bps_rd_max_length": maximum length of the @bps_rd_max burst period, in seconds (json-int, optional) -- "bps_wr_max_length": maximum length of the @bps_wr_max burst period, in seconds (json-int, optional) -- "iops_max_length": maximum length of the @iops_max burst period, in seconds (json-int, optional) -- "iops_rd_max_length": maximum length of the @iops_rd_max burst period, in seconds (json-int, optional) -- "iops_wr_max_length": maximum length of the @iops_wr_max burst period, in seconds (json-int, optional) -- "iops_size": I/O size in bytes when limiting (json-int, optional) -- "group": throttle group name (json-string, optional) - -Example: - --> { "execute": "block_set_io_throttle", "arguments": { "id": "ide0-1-0", - "bps": 1000000, - "bps_rd": 0, - "bps_wr": 0, - "iops": 0, - "iops_rd": 0, - "iops_wr": 0, - "bps_max": 8000000, - "bps_rd_max": 0, - "bps_wr_max": 0, - "iops_max": 0, - "iops_rd_max": 0, - "iops_wr_max": 0, - "bps_max_length": 60, - "iops_size": 0 } } -<- { "return": {} } - -set_password ------------- - -Set the password for vnc/spice protocols. - -Arguments: - -- "protocol": protocol name (json-string) -- "password": password (json-string) -- "connected": [ keep | disconnect | fail ] (json-string, optional) - -Example: - --> { "execute": "set_password", "arguments": { "protocol": "vnc", - "password": "secret" } } -<- { "return": {} } - -expire_password ---------------- - -Set the password expire time for vnc/spice protocols. - -Arguments: - -- "protocol": protocol name (json-string) -- "time": [ now | never | +secs | secs ] (json-string) - -Example: - --> { "execute": "expire_password", "arguments": { "protocol": "vnc", - "time": "+60" } } -<- { "return": {} } - -add_client ----------- - -Add a graphics client - -Arguments: - -- "protocol": protocol name (json-string) -- "fdname": file descriptor name (json-string) -- "skipauth": whether to skip authentication (json-bool, optional) -- "tls": whether to perform TLS (json-bool, optional) - -Example: - --> { "execute": "add_client", "arguments": { "protocol": "vnc", - "fdname": "myclient" } } -<- { "return": {} } - -qmp_capabilities ----------------- - -Enable QMP capabilities. - -Arguments: None. - -Example: - --> { "execute": "qmp_capabilities" } -<- { "return": {} } - -Note: This command must be issued before issuing any other command. - -human-monitor-command ---------------------- - -Execute a Human Monitor command. - -Arguments: - -- command-line: the command name and its arguments, just like the - Human Monitor's shell (json-string) -- cpu-index: select the CPU number to be used by commands which access CPU - data, like 'info registers'. The Monitor selects CPU 0 if this - argument is not provided (json-int, optional) - -Example: - --> { "execute": "human-monitor-command", "arguments": { "command-line": "info kvm" } } -<- { "return": "kvm support: enabled\r\n" } - -Notes: - -(1) The Human Monitor is NOT an stable interface, this means that command - names, arguments and responses can change or be removed at ANY time. - Applications that rely on long term stability guarantees should NOT - use this command - -(2) Limitations: - - o This command is stateless, this means that commands that depend - on state information (such as getfd) might not work - - o Commands that prompt the user for data (eg. 'cont' when the block - device is encrypted) don't currently work - -3. Query Commands -================= - - -query-version -------------- - -Show QEMU version. - -Return a json-object with the following information: - -- "qemu": A json-object containing three integer values: - - "major": QEMU's major version (json-int) - - "minor": QEMU's minor version (json-int) - - "micro": QEMU's micro version (json-int) -- "package": package's version (json-string) - -Example: - --> { "execute": "query-version" } -<- { - "return":{ - "qemu":{ - "major":0, - "minor":11, - "micro":5 - }, - "package":"" - } - } - -query-commands --------------- - -List QMP available commands. - -Each command is represented by a json-object, the returned value is a json-array -of all commands. - -Each json-object contain: - -- "name": command's name (json-string) - -Example: - --> { "execute": "query-commands" } -<- { - "return":[ - { - "name":"query-balloon" - }, - { - "name":"system_powerdown" - } - ] - } - -Note: This example has been shortened as the real response is too long. - -query-events --------------- - -List QMP available events. - -Each event is represented by a json-object, the returned value is a json-array -of all events. - -Each json-object contains: - -- "name": event's name (json-string) - -Example: - --> { "execute": "query-events" } -<- { - "return":[ - { - "name":"SHUTDOWN" - }, - { - "name":"RESET" - } - ] - } - -Note: This example has been shortened as the real response is too long. - -query-qmp-schema ----------------- - -Return the QMP wire schema. The returned value is a json-array of -named schema entities. Entities are commands, events and various -types. See docs/qapi-code-gen.txt for information on their structure -and intended use. - -query-chardev -------------- - -Each device is represented by a json-object. The returned value is a json-array -of all devices. - -Each json-object contain the following: - -- "label": device's label (json-string) -- "filename": device's file (json-string) -- "frontend-open": open/closed state of the frontend device attached to this - backend (json-bool) - -Example: - --> { "execute": "query-chardev" } -<- { - "return": [ - { - "label": "charchannel0", - "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.agent,server", - "frontend-open": false - }, - { - "label": "charmonitor", - "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.monitor,server", - "frontend-open": true - }, - { - "label": "charserial0", - "filename": "pty:/dev/pts/2", - "frontend-open": true - } - ] - } - -query-chardev-backends -------------- - -List available character device backends. - -Each backend is represented by a json-object, the returned value is a json-array -of all backends. - -Each json-object contains: - -- "name": backend name (json-string) - -Example: - --> { "execute": "query-chardev-backends" } -<- { - "return":[ - { - "name":"udp" - }, - { - "name":"tcp" - }, - { - "name":"unix" - }, - { - "name":"spiceport" - } - ] - } - -query-block ------------ - -Show the block devices. - -Each block device information is stored in a json-object and the returned value -is a json-array of all devices. - -Each json-object contain the following: - -- "device": device name (json-string) -- "type": device type (json-string) - - deprecated, retained for backward compatibility - - Possible values: "unknown" -- "removable": true if the device is removable, false otherwise (json-bool) -- "locked": true if the device is locked, false otherwise (json-bool) -- "tray_open": only present if removable, true if the device has a tray, - and it is open (json-bool) -- "inserted": only present if the device is inserted, it is a json-object - containing the following: - - "file": device file name (json-string) - - "ro": true if read-only, false otherwise (json-bool) - - "drv": driver format name (json-string) - - Possible values: "blkdebug", "bochs", "cloop", "dmg", - "file", "file", "ftp", "ftps", "host_cdrom", - "host_device", "http", "https", - "nbd", "parallels", "qcow", "qcow2", "raw", - "vdi", "vmdk", "vpc", "vvfat" - - "backing_file": backing file name (json-string, optional) - - "backing_file_depth": number of files in the backing file chain (json-int) - - "encrypted": true if encrypted, false otherwise (json-bool) - - "bps": limit total bytes per second (json-int) - - "bps_rd": limit read bytes per second (json-int) - - "bps_wr": limit write bytes per second (json-int) - - "iops": limit total I/O operations per second (json-int) - - "iops_rd": limit read operations per second (json-int) - - "iops_wr": limit write operations per second (json-int) - - "bps_max": total max in bytes (json-int) - - "bps_rd_max": read max in bytes (json-int) - - "bps_wr_max": write max in bytes (json-int) - - "iops_max": total I/O operations max (json-int) - - "iops_rd_max": read I/O operations max (json-int) - - "iops_wr_max": write I/O operations max (json-int) - - "iops_size": I/O size when limiting by iops (json-int) - - "detect_zeroes": detect and optimize zero writing (json-string) - - Possible values: "off", "on", "unmap" - - "write_threshold": write offset threshold in bytes, a event will be - emitted if crossed. Zero if disabled (json-int) - - "image": the detail of the image, it is a json-object containing - the following: - - "filename": image file name (json-string) - - "format": image format (json-string) - - "virtual-size": image capacity in bytes (json-int) - - "dirty-flag": true if image is not cleanly closed, not present - means clean (json-bool, optional) - - "actual-size": actual size on disk in bytes of the image, not - present when image does not support thin - provision (json-int, optional) - - "cluster-size": size of a cluster in bytes, not present if image - format does not support it (json-int, optional) - - "encrypted": true if the image is encrypted, not present means - false or the image format does not support - encryption (json-bool, optional) - - "backing_file": backing file name, not present means no backing - file is used or the image format does not - support backing file chain - (json-string, optional) - - "full-backing-filename": full path of the backing file, not - present if it equals backing_file or no - backing file is used - (json-string, optional) - - "backing-filename-format": the format of the backing file, not - present means unknown or no backing - file (json-string, optional) - - "snapshots": the internal snapshot info, it is an optional list - of json-object containing the following: - - "id": unique snapshot id (json-string) - - "name": snapshot name (json-string) - - "vm-state-size": size of the VM state in bytes (json-int) - - "date-sec": UTC date of the snapshot in seconds (json-int) - - "date-nsec": fractional part in nanoseconds to be used with - date-sec (json-int) - - "vm-clock-sec": VM clock relative to boot in seconds - (json-int) - - "vm-clock-nsec": fractional part in nanoseconds to be used - with vm-clock-sec (json-int) - - "backing-image": the detail of the backing image, it is an - optional json-object only present when a - backing image present for this image - -- "io-status": I/O operation status, only present if the device supports it - and the VM is configured to stop on errors. It's always reset - to "ok" when the "cont" command is issued (json_string, optional) - - Possible values: "ok", "failed", "nospace" - -Example: - --> { "execute": "query-block" } -<- { - "return":[ - { - "io-status": "ok", - "device":"ide0-hd0", - "locked":false, - "removable":false, - "inserted":{ - "ro":false, - "drv":"qcow2", - "encrypted":false, - "file":"disks/test.qcow2", - "backing_file_depth":1, - "bps":1000000, - "bps_rd":0, - "bps_wr":0, - "iops":1000000, - "iops_rd":0, - "iops_wr":0, - "bps_max": 8000000, - "bps_rd_max": 0, - "bps_wr_max": 0, - "iops_max": 0, - "iops_rd_max": 0, - "iops_wr_max": 0, - "iops_size": 0, - "detect_zeroes": "on", - "write_threshold": 0, - "image":{ - "filename":"disks/test.qcow2", - "format":"qcow2", - "virtual-size":2048000, - "backing_file":"base.qcow2", - "full-backing-filename":"disks/base.qcow2", - "backing-filename-format":"qcow2", - "snapshots":[ - { - "id": "1", - "name": "snapshot1", - "vm-state-size": 0, - "date-sec": 10000200, - "date-nsec": 12, - "vm-clock-sec": 206, - "vm-clock-nsec": 30 - } - ], - "backing-image":{ - "filename":"disks/base.qcow2", - "format":"qcow2", - "virtual-size":2048000 - } - } - }, - "type":"unknown" - }, - { - "io-status": "ok", - "device":"ide1-cd0", - "locked":false, - "removable":true, - "type":"unknown" - }, - { - "device":"floppy0", - "locked":false, - "removable":true, - "type":"unknown" - }, - { - "device":"sd0", - "locked":false, - "removable":true, - "type":"unknown" - } - ] - } - -query-blockstats ----------------- - -Show block device statistics. - -Each device statistic information is stored in a json-object and the returned -value is a json-array of all devices. - -Each json-object contain the following: - -- "device": device name (json-string) -- "stats": A json-object with the statistics information, it contains: - - "rd_bytes": bytes read (json-int) - - "wr_bytes": bytes written (json-int) - - "rd_operations": read operations (json-int) - - "wr_operations": write operations (json-int) - - "flush_operations": cache flush operations (json-int) - - "wr_total_time_ns": total time spend on writes in nano-seconds (json-int) - - "rd_total_time_ns": total time spend on reads in nano-seconds (json-int) - - "flush_total_time_ns": total time spend on cache flushes in nano-seconds (json-int) - - "wr_highest_offset": The offset after the greatest byte written to the - BlockDriverState since it has been opened (json-int) - - "rd_merged": number of read requests that have been merged into - another request (json-int) - - "wr_merged": number of write requests that have been merged into - another request (json-int) - - "idle_time_ns": time since the last I/O operation, in - nanoseconds. If the field is absent it means - that there haven't been any operations yet - (json-int, optional) - - "failed_rd_operations": number of failed read operations - (json-int) - - "failed_wr_operations": number of failed write operations - (json-int) - - "failed_flush_operations": number of failed flush operations - (json-int) - - "invalid_rd_operations": number of invalid read operations - (json-int) - - "invalid_wr_operations": number of invalid write operations - (json-int) - - "invalid_flush_operations": number of invalid flush operations - (json-int) - - "account_invalid": whether invalid operations are included in - the last access statistics (json-bool) - - "account_failed": whether failed operations are included in the - latency and last access statistics - (json-bool) - - "timed_stats": A json-array containing statistics collected in - specific intervals, with the following members: - - "interval_length": interval used for calculating the - statistics, in seconds (json-int) - - "min_rd_latency_ns": minimum latency of read operations in - the defined interval, in nanoseconds - (json-int) - - "min_wr_latency_ns": minimum latency of write operations in - the defined interval, in nanoseconds - (json-int) - - "min_flush_latency_ns": minimum latency of flush operations - in the defined interval, in - nanoseconds (json-int) - - "max_rd_latency_ns": maximum latency of read operations in - the defined interval, in nanoseconds - (json-int) - - "max_wr_latency_ns": maximum latency of write operations in - the defined interval, in nanoseconds - (json-int) - - "max_flush_latency_ns": maximum latency of flush operations - in the defined interval, in - nanoseconds (json-int) - - "avg_rd_latency_ns": average latency of read operations in - the defined interval, in nanoseconds - (json-int) - - "avg_wr_latency_ns": average latency of write operations in - the defined interval, in nanoseconds - (json-int) - - "avg_flush_latency_ns": average latency of flush operations - in the defined interval, in - nanoseconds (json-int) - - "avg_rd_queue_depth": average number of pending read - operations in the defined interval - (json-number) - - "avg_wr_queue_depth": average number of pending write - operations in the defined interval - (json-number). -- "parent": Contains recursively the statistics of the underlying - protocol (e.g. the host file for a qcow2 image). If there is - no underlying protocol, this field is omitted - (json-object, optional) - -Example: - --> { "execute": "query-blockstats" } -<- { - "return":[ - { - "device":"ide0-hd0", - "parent":{ - "stats":{ - "wr_highest_offset":3686448128, - "wr_bytes":9786368, - "wr_operations":751, - "rd_bytes":122567168, - "rd_operations":36772 - "wr_total_times_ns":313253456 - "rd_total_times_ns":3465673657 - "flush_total_times_ns":49653 - "flush_operations":61, - "rd_merged":0, - "wr_merged":0, - "idle_time_ns":2953431879, - "account_invalid":true, - "account_failed":false - } - }, - "stats":{ - "wr_highest_offset":2821110784, - "wr_bytes":9786368, - "wr_operations":692, - "rd_bytes":122739200, - "rd_operations":36604 - "flush_operations":51, - "wr_total_times_ns":313253456 - "rd_total_times_ns":3465673657 - "flush_total_times_ns":49653, - "rd_merged":0, - "wr_merged":0, - "idle_time_ns":2953431879, - "account_invalid":true, - "account_failed":false - } - }, - { - "device":"ide1-cd0", - "stats":{ - "wr_highest_offset":0, - "wr_bytes":0, - "wr_operations":0, - "rd_bytes":0, - "rd_operations":0 - "flush_operations":0, - "wr_total_times_ns":0 - "rd_total_times_ns":0 - "flush_total_times_ns":0, - "rd_merged":0, - "wr_merged":0, - "account_invalid":false, - "account_failed":false - } - }, - { - "device":"floppy0", - "stats":{ - "wr_highest_offset":0, - "wr_bytes":0, - "wr_operations":0, - "rd_bytes":0, - "rd_operations":0 - "flush_operations":0, - "wr_total_times_ns":0 - "rd_total_times_ns":0 - "flush_total_times_ns":0, - "rd_merged":0, - "wr_merged":0, - "account_invalid":false, - "account_failed":false - } - }, - { - "device":"sd0", - "stats":{ - "wr_highest_offset":0, - "wr_bytes":0, - "wr_operations":0, - "rd_bytes":0, - "rd_operations":0 - "flush_operations":0, - "wr_total_times_ns":0 - "rd_total_times_ns":0 - "flush_total_times_ns":0, - "rd_merged":0, - "wr_merged":0, - "account_invalid":false, - "account_failed":false - } - } - ] - } - -query-cpus ----------- - -Show CPU information. - -Return a json-array. Each CPU is represented by a json-object, which contains: - -- "CPU": CPU index (json-int) -- "current": true if this is the current CPU, false otherwise (json-bool) -- "halted": true if the cpu is halted, false otherwise (json-bool) -- "qom_path": path to the CPU object in the QOM tree (json-str) -- "arch": architecture of the cpu, which determines what additional - keys will be present (json-str) -- Current program counter. The key's name depends on the architecture: - "pc": i386/x86_64 (json-int) - "nip": PPC (json-int) - "pc" and "npc": sparc (json-int) - "PC": mips (json-int) -- "thread_id": ID of the underlying host thread (json-int) - -Example: - --> { "execute": "query-cpus" } -<- { - "return":[ - { - "CPU":0, - "current":true, - "halted":false, - "qom_path":"/machine/unattached/device[0]", - "arch":"x86", - "pc":3227107138, - "thread_id":3134 - }, - { - "CPU":1, - "current":false, - "halted":true, - "qom_path":"/machine/unattached/device[2]", - "arch":"x86", - "pc":7108165, - "thread_id":3135 - } - ] - } - -query-iothreads ---------------- - -Returns a list of information about each iothread. - -Note this list excludes the QEMU main loop thread, which is not declared -using the -object iothread command-line option. It is always the main thread -of the process. - -Return a json-array. Each iothread is represented by a json-object, which contains: - -- "id": name of iothread (json-str) -- "thread-id": ID of the underlying host thread (json-int) - -Example: - --> { "execute": "query-iothreads" } -<- { - "return":[ - { - "id":"iothread0", - "thread-id":3134 - }, - { - "id":"iothread1", - "thread-id":3135 - } - ] - } - -query-pci ---------- - -PCI buses and devices information. - -The returned value is a json-array of all buses. Each bus is represented by -a json-object, which has a key with a json-array of all PCI devices attached -to it. Each device is represented by a json-object. - -The bus json-object contains the following: - -- "bus": bus number (json-int) -- "devices": a json-array of json-objects, each json-object represents a - PCI device - -The PCI device json-object contains the following: - -- "bus": identical to the parent's bus number (json-int) -- "slot": slot number (json-int) -- "function": function number (json-int) -- "class_info": a json-object containing: - - "desc": device class description (json-string, optional) - - "class": device class number (json-int) -- "id": a json-object containing: - - "device": device ID (json-int) - - "vendor": vendor ID (json-int) -- "irq": device's IRQ if assigned (json-int, optional) -- "qdev_id": qdev id string (json-string) -- "pci_bridge": It's a json-object, only present if this device is a - PCI bridge, contains: - - "bus": bus number (json-int) - - "secondary": secondary bus number (json-int) - - "subordinate": subordinate bus number (json-int) - - "io_range": I/O memory range information, a json-object with the - following members: - - "base": base address, in bytes (json-int) - - "limit": limit address, in bytes (json-int) - - "memory_range": memory range information, a json-object with the - following members: - - "base": base address, in bytes (json-int) - - "limit": limit address, in bytes (json-int) - - "prefetchable_range": Prefetchable memory range information, a - json-object with the following members: - - "base": base address, in bytes (json-int) - - "limit": limit address, in bytes (json-int) - - "devices": a json-array of PCI devices if there's any attached, each - each element is represented by a json-object, which contains - the same members of the 'PCI device json-object' described - above (optional) -- "regions": a json-array of json-objects, each json-object represents a - memory region of this device - -The memory range json-object contains the following: - -- "base": base memory address (json-int) -- "limit": limit value (json-int) - -The region json-object can be an I/O region or a memory region, an I/O region -json-object contains the following: - -- "type": "io" (json-string, fixed) -- "bar": BAR number (json-int) -- "address": memory address (json-int) -- "size": memory size (json-int) - -A memory region json-object contains the following: - -- "type": "memory" (json-string, fixed) -- "bar": BAR number (json-int) -- "address": memory address (json-int) -- "size": memory size (json-int) -- "mem_type_64": true or false (json-bool) -- "prefetch": true or false (json-bool) - -Example: - --> { "execute": "query-pci" } -<- { - "return":[ - { - "bus":0, - "devices":[ - { - "bus":0, - "qdev_id":"", - "slot":0, - "class_info":{ - "class":1536, - "desc":"Host bridge" - }, - "id":{ - "device":32902, - "vendor":4663 - }, - "function":0, - "regions":[ - - ] - }, - { - "bus":0, - "qdev_id":"", - "slot":1, - "class_info":{ - "class":1537, - "desc":"ISA bridge" - }, - "id":{ - "device":32902, - "vendor":28672 - }, - "function":0, - "regions":[ - - ] - }, - { - "bus":0, - "qdev_id":"", - "slot":1, - "class_info":{ - "class":257, - "desc":"IDE controller" - }, - "id":{ - "device":32902, - "vendor":28688 - }, - "function":1, - "regions":[ - { - "bar":4, - "size":16, - "address":49152, - "type":"io" - } - ] - }, - { - "bus":0, - "qdev_id":"", - "slot":2, - "class_info":{ - "class":768, - "desc":"VGA controller" - }, - "id":{ - "device":4115, - "vendor":184 - }, - "function":0, - "regions":[ - { - "prefetch":true, - "mem_type_64":false, - "bar":0, - "size":33554432, - "address":4026531840, - "type":"memory" - }, - { - "prefetch":false, - "mem_type_64":false, - "bar":1, - "size":4096, - "address":4060086272, - "type":"memory" - }, - { - "prefetch":false, - "mem_type_64":false, - "bar":6, - "size":65536, - "address":-1, - "type":"memory" - } - ] - }, - { - "bus":0, - "qdev_id":"", - "irq":11, - "slot":4, - "class_info":{ - "class":1280, - "desc":"RAM controller" - }, - "id":{ - "device":6900, - "vendor":4098 - }, - "function":0, - "regions":[ - { - "bar":0, - "size":32, - "address":49280, - "type":"io" - } - ] - } - ] - } - ] - } - -Note: This example has been shortened as the real response is too long. - -query-kvm ---------- - -Show KVM information. - -Return a json-object with the following information: - -- "enabled": true if KVM support is enabled, false otherwise (json-bool) -- "present": true if QEMU has KVM support, false otherwise (json-bool) - -Example: - --> { "execute": "query-kvm" } -<- { "return": { "enabled": true, "present": true } } - -query-status ------------- - -Return a json-object with the following information: - -- "running": true if the VM is running, or false if it is paused (json-bool) -- "singlestep": true if the VM is in single step mode, - false otherwise (json-bool) -- "status": one of the following values (json-string) - "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 - -Example: - --> { "execute": "query-status" } -<- { "return": { "running": true, "singlestep": false, "status": "running" } } - -query-mice ----------- - -Show VM mice information. - -Each mouse is represented by a json-object, the returned value is a json-array -of all mice. - -The mouse json-object contains the following: - -- "name": mouse's name (json-string) -- "index": mouse's index (json-int) -- "current": true if this mouse is receiving events, false otherwise (json-bool) -- "absolute": true if the mouse generates absolute input events (json-bool) - -Example: - --> { "execute": "query-mice" } -<- { - "return":[ - { - "name":"QEMU Microsoft Mouse", - "index":0, - "current":false, - "absolute":false - }, - { - "name":"QEMU PS/2 Mouse", - "index":1, - "current":true, - "absolute":true - } - ] - } - -query-vnc ---------- - -Show VNC server information. - -Return a json-object with server information. Connected clients are returned -as a json-array of json-objects. - -The main json-object contains the following: - -- "enabled": true or false (json-bool) -- "host": server's IP address (json-string) -- "family": address family (json-string) - - Possible values: "ipv4", "ipv6", "unix", "unknown" -- "service": server's port number (json-string) -- "auth": authentication method (json-string) - - Possible values: "invalid", "none", "ra2", "ra2ne", "sasl", "tight", - "tls", "ultra", "unknown", "vencrypt", "vencrypt", - "vencrypt+plain", "vencrypt+tls+none", - "vencrypt+tls+plain", "vencrypt+tls+sasl", - "vencrypt+tls+vnc", "vencrypt+x509+none", - "vencrypt+x509+plain", "vencrypt+x509+sasl", - "vencrypt+x509+vnc", "vnc" -- "clients": a json-array of all connected clients - -Clients are described by a json-object, each one contain the following: - -- "host": client's IP address (json-string) -- "family": address family (json-string) - - Possible values: "ipv4", "ipv6", "unix", "unknown" -- "service": client's port number (json-string) -- "x509_dname": TLS dname (json-string, optional) -- "sasl_username": SASL username (json-string, optional) - -Example: - --> { "execute": "query-vnc" } -<- { - "return":{ - "enabled":true, - "host":"0.0.0.0", - "service":"50402", - "auth":"vnc", - "family":"ipv4", - "clients":[ - { - "host":"127.0.0.1", - "service":"50401", - "family":"ipv4" - } - ] - } - } - -query-spice ------------ - -Show SPICE server information. - -Return a json-object with server information. Connected clients are returned -as a json-array of json-objects. - -The main json-object contains the following: - -- "enabled": true or false (json-bool) -- "host": server's IP address (json-string) -- "port": server's port number (json-int, optional) -- "tls-port": server's port number (json-int, optional) -- "auth": authentication method (json-string) - - Possible values: "none", "spice" -- "channels": a json-array of all active channels clients - -Channels are described by a json-object, each one contain the following: - -- "host": client's IP address (json-string) -- "family": address family (json-string) - - Possible values: "ipv4", "ipv6", "unix", "unknown" -- "port": client's port number (json-string) -- "connection-id": spice connection id. All channels with the same id - belong to the same spice session (json-int) -- "channel-type": channel type. "1" is the main control channel, filter for - this one if you want track spice sessions only (json-int) -- "channel-id": channel id. Usually "0", might be different needed when - multiple channels of the same type exist, such as multiple - display channels in a multihead setup (json-int) -- "tls": whether the channel is encrypted (json-bool) - -Example: - --> { "execute": "query-spice" } -<- { - "return": { - "enabled": true, - "auth": "spice", - "port": 5920, - "tls-port": 5921, - "host": "0.0.0.0", - "channels": [ - { - "port": "54924", - "family": "ipv4", - "channel-type": 1, - "connection-id": 1804289383, - "host": "127.0.0.1", - "channel-id": 0, - "tls": true - }, - { - "port": "36710", - "family": "ipv4", - "channel-type": 4, - "connection-id": 1804289383, - "host": "127.0.0.1", - "channel-id": 0, - "tls": false - }, - [ ... more channels follow ... ] - ] - } - } - -query-name ----------- - -Show VM name. - -Return a json-object with the following information: - -- "name": VM's name (json-string, optional) - -Example: - --> { "execute": "query-name" } -<- { "return": { "name": "qemu-name" } } - -query-uuid ----------- - -Show VM UUID. - -Return a json-object with the following information: - -- "UUID": Universally Unique Identifier (json-string) - -Example: - --> { "execute": "query-uuid" } -<- { "return": { "UUID": "550e8400-e29b-41d4-a716-446655440000" } } - -query-command-line-options --------------------------- - -Show command line option schema. - -Return a json-array of command line option schema for all options (or for -the given option), returning an error if the given option doesn't exist. - -Each array entry contains the following: - -- "option": option name (json-string) -- "parameters": a json-array describes all parameters of the option: - - "name": parameter name (json-string) - - "type": parameter type (one of 'string', 'boolean', 'number', - or 'size') - - "help": human readable description of the parameter - (json-string, optional) - - "default": default value string for the parameter - (json-string, optional) - -Example: - --> { "execute": "query-command-line-options", "arguments": { "option": "option-rom" } } -<- { "return": [ - { - "parameters": [ - { - "name": "romfile", - "type": "string" - }, - { - "name": "bootindex", - "type": "number" - } - ], - "option": "option-rom" - } - ] - } - -query-migrate -------------- - -Migration status. - -Return a json-object. If migration is active there will be another json-object -with RAM migration status and if block migration is active another one with -block migration status. - -The main json-object contains the following: - -- "status": migration status (json-string) - - Possible values: "setup", "active", "completed", "failed", "cancelled" -- "total-time": total amount of ms since migration started. If - migration has ended, it returns the total migration - time (json-int) -- "setup-time" amount of setup time in milliseconds _before_ the - iterations begin but _after_ the QMP command is issued. - This is designed to provide an accounting of any activities - (such as RDMA pinning) which may be expensive, but do not - actually occur during the iterative migration rounds - themselves. (json-int) -- "downtime": only present when migration has finished correctly - total amount in ms for downtime that happened (json-int) -- "expected-downtime": only present while migration is active - total amount in ms for downtime that was calculated on - the last bitmap round (json-int) -- "ram": only present if "status" is "active", it is a json-object with the - following RAM information: - - "transferred": amount transferred in bytes (json-int) - - "remaining": amount remaining to transfer in bytes (json-int) - - "total": total amount of memory in bytes (json-int) - - "duplicate": number of pages filled entirely with the same - byte (json-int) - These are sent over the wire much more efficiently. - - "skipped": number of skipped zero pages (json-int) - - "normal" : number of whole pages transferred. I.e. they - were not sent as duplicate or xbzrle pages (json-int) - - "normal-bytes" : number of bytes transferred in whole - pages. This is just normal pages times size of one page, - but this way upper levels don't need to care about page - size (json-int) - - "dirty-sync-count": times that dirty ram was synchronized (json-int) -- "disk": only present if "status" is "active" and it is a block migration, - it is a json-object with the following disk information: - - "transferred": amount transferred in bytes (json-int) - - "remaining": amount remaining to transfer in bytes json-int) - - "total": total disk size in bytes (json-int) -- "xbzrle-cache": only present if XBZRLE is active. - It is a json-object with the following XBZRLE information: - - "cache-size": XBZRLE cache size in bytes - - "bytes": number of bytes transferred for XBZRLE compressed pages - - "pages": number of XBZRLE compressed pages - - "cache-miss": number of XBRZRLE page cache misses - - "cache-miss-rate": rate of XBRZRLE page cache misses - - "overflow": number of times XBZRLE overflows. This means - that the XBZRLE encoding was bigger than just sent the - whole page, and then we sent the whole page instead (as as - normal page). - -Examples: - -1. Before the first migration - --> { "execute": "query-migrate" } -<- { "return": {} } - -2. Migration is done and has succeeded - --> { "execute": "query-migrate" } -<- { "return": { - "status": "completed", - "ram":{ - "transferred":123, - "remaining":123, - "total":246, - "total-time":12345, - "setup-time":12345, - "downtime":12345, - "duplicate":123, - "normal":123, - "normal-bytes":123456, - "dirty-sync-count":15 - } - } - } - -3. Migration is done and has failed - --> { "execute": "query-migrate" } -<- { "return": { "status": "failed" } } - -4. Migration is being performed and is not a block migration: - --> { "execute": "query-migrate" } -<- { - "return":{ - "status":"active", - "ram":{ - "transferred":123, - "remaining":123, - "total":246, - "total-time":12345, - "setup-time":12345, - "expected-downtime":12345, - "duplicate":123, - "normal":123, - "normal-bytes":123456, - "dirty-sync-count":15 - } - } - } - -5. Migration is being performed and is a block migration: - --> { "execute": "query-migrate" } -<- { - "return":{ - "status":"active", - "ram":{ - "total":1057024, - "remaining":1053304, - "transferred":3720, - "total-time":12345, - "setup-time":12345, - "expected-downtime":12345, - "duplicate":123, - "normal":123, - "normal-bytes":123456, - "dirty-sync-count":15 - }, - "disk":{ - "total":20971520, - "remaining":20880384, - "transferred":91136 - } - } - } - -6. Migration is being performed and XBZRLE is active: - --> { "execute": "query-migrate" } -<- { - "return":{ - "status":"active", - "capabilities" : [ { "capability": "xbzrle", "state" : true } ], - "ram":{ - "total":1057024, - "remaining":1053304, - "transferred":3720, - "total-time":12345, - "setup-time":12345, - "expected-downtime":12345, - "duplicate":10, - "normal":3333, - "normal-bytes":3412992, - "dirty-sync-count":15 - }, - "xbzrle-cache":{ - "cache-size":67108864, - "bytes":20971520, - "pages":2444343, - "cache-miss":2244, - "cache-miss-rate":0.123, - "overflow":34434 - } - } - } - -migrate-set-capabilities ------------------------- - -Enable/Disable migration capabilities - -- "xbzrle": XBZRLE support -- "rdma-pin-all": pin all pages when using RDMA during migration -- "auto-converge": throttle down guest to help convergence of migration -- "zero-blocks": compress zero blocks during block migration -- "compress": use multiple compression threads to accelerate live migration -- "events": generate events for each migration state change -- "postcopy-ram": postcopy mode for live migration -- "x-colo": COarse-Grain LOck Stepping (COLO) for Non-stop Service - -Arguments: - -Example: - --> { "execute": "migrate-set-capabilities" , "arguments": - { "capabilities": [ { "capability": "xbzrle", "state": true } ] } } - -query-migrate-capabilities --------------------------- - -Query current migration capabilities - -- "capabilities": migration capabilities state - - "xbzrle" : XBZRLE state (json-bool) - - "rdma-pin-all" : RDMA Pin Page state (json-bool) - - "auto-converge" : Auto Converge state (json-bool) - - "zero-blocks" : Zero Blocks state (json-bool) - - "compress": Multiple compression threads state (json-bool) - - "events": Migration state change event state (json-bool) - - "postcopy-ram": postcopy ram state (json-bool) - - "x-colo": COarse-Grain LOck Stepping for Non-stop Service (json-bool) - -Arguments: - -Example: - --> { "execute": "query-migrate-capabilities" } -<- {"return": [ - {"state": false, "capability": "xbzrle"}, - {"state": false, "capability": "rdma-pin-all"}, - {"state": false, "capability": "auto-converge"}, - {"state": false, "capability": "zero-blocks"}, - {"state": false, "capability": "compress"}, - {"state": true, "capability": "events"}, - {"state": false, "capability": "postcopy-ram"}, - {"state": false, "capability": "x-colo"} - ]} - -migrate-set-parameters ----------------------- - -Set migration parameters - -- "compress-level": set compression level during migration (json-int) -- "compress-threads": set compression thread count for migration (json-int) -- "decompress-threads": set decompression thread count for migration (json-int) -- "cpu-throttle-initial": set initial percentage of time guest cpus are - throttled for auto-converge (json-int) -- "cpu-throttle-increment": set throttle increasing percentage for - auto-converge (json-int) -- "max-bandwidth": set maximum speed for migrations (in bytes/sec) (json-int) -- "downtime-limit": set maximum tolerated downtime (in milliseconds) for - migrations (json-int) -- "x-checkpoint-delay": set the delay time for periodic checkpoint (json-int) - -Arguments: - -Example: - --> { "execute": "migrate-set-parameters" , "arguments": - { "compress-level": 1 } } - -query-migrate-parameters ------------------------- - -Query current migration parameters - -- "parameters": migration parameters value - - "compress-level" : compression level value (json-int) - - "compress-threads" : compression thread count value (json-int) - - "decompress-threads" : decompression thread count value (json-int) - - "cpu-throttle-initial" : initial percentage of time guest cpus are - throttled (json-int) - - "cpu-throttle-increment" : throttle increasing percentage for - auto-converge (json-int) - - "max-bandwidth" : maximium migration speed in bytes per second - (json-int) - - "downtime-limit" : maximum tolerated downtime of migration in - milliseconds (json-int) -Arguments: - -Example: - --> { "execute": "query-migrate-parameters" } -<- { - "return": { - "decompress-threads": 2, - "cpu-throttle-increment": 10, - "compress-threads": 8, - "compress-level": 1, - "cpu-throttle-initial": 20, - "max-bandwidth": 33554432, - "downtime-limit": 300 - } - } - -query-balloon -------------- - -Show balloon information. - -Make an asynchronous request for balloon info. When the request completes a -json-object will be returned containing the following data: - -- "actual": current balloon value in bytes (json-int) - -Example: - --> { "execute": "query-balloon" } -<- { - "return":{ - "actual":1073741824, - } - } - -query-tpm ---------- - -Return information about the TPM device. - -Arguments: None - -Example: - --> { "execute": "query-tpm" } -<- { "return": - [ - { "model": "tpm-tis", - "options": - { "type": "passthrough", - "data": - { "cancel-path": "/sys/class/misc/tpm0/device/cancel", - "path": "/dev/tpm0" - } - }, - "id": "tpm0" - } - ] - } - -query-tpm-models ----------------- - -Return a list of supported TPM models. - -Arguments: None - -Example: - --> { "execute": "query-tpm-models" } -<- { "return": [ "tpm-tis" ] } - -query-tpm-types ---------------- - -Return a list of supported TPM types. - -Arguments: None - -Example: - --> { "execute": "query-tpm-types" } -<- { "return": [ "passthrough" ] } - -chardev-add ----------------- - -Add a chardev. - -Arguments: - -- "id": the chardev's ID, must be unique (json-string) -- "backend": chardev backend type + parameters - -Examples: - --> { "execute" : "chardev-add", - "arguments" : { "id" : "foo", - "backend" : { "type" : "null", "data" : {} } } } -<- { "return": {} } - --> { "execute" : "chardev-add", - "arguments" : { "id" : "bar", - "backend" : { "type" : "file", - "data" : { "out" : "/tmp/bar.log" } } } } -<- { "return": {} } - --> { "execute" : "chardev-add", - "arguments" : { "id" : "baz", - "backend" : { "type" : "pty", "data" : {} } } } -<- { "return": { "pty" : "/dev/pty/42" } } - -chardev-remove --------------- - -Remove a chardev. - -Arguments: - -- "id": the chardev's ID, must exist and not be in use (json-string) - -Example: - --> { "execute": "chardev-remove", "arguments": { "id" : "foo" } } -<- { "return": {} } - -query-rx-filter ---------------- - -Show rx-filter information. - -Returns a json-array of rx-filter information for all NICs (or for the -given NIC), returning an error if the given NIC doesn't exist, or -given NIC doesn't support rx-filter querying, or given net client -isn't a NIC. - -The query will clear the event notification flag of each NIC, then qemu -will start to emit event to QMP monitor. - -Each array entry contains the following: - -- "name": net client name (json-string) -- "promiscuous": promiscuous mode is enabled (json-bool) -- "multicast": multicast receive state (one of 'normal', 'none', 'all') -- "unicast": unicast receive state (one of 'normal', 'none', 'all') -- "vlan": vlan receive state (one of 'normal', 'none', 'all') (Since 2.0) -- "broadcast-allowed": allow to receive broadcast (json-bool) -- "multicast-overflow": multicast table is overflowed (json-bool) -- "unicast-overflow": unicast table is overflowed (json-bool) -- "main-mac": main macaddr string (json-string) -- "vlan-table": a json-array of active vlan id -- "unicast-table": a json-array of unicast macaddr string -- "multicast-table": a json-array of multicast macaddr string - -Example: - --> { "execute": "query-rx-filter", "arguments": { "name": "vnet0" } } -<- { "return": [ - { - "promiscuous": true, - "name": "vnet0", - "main-mac": "52:54:00:12:34:56", - "unicast": "normal", - "vlan": "normal", - "vlan-table": [ - 4, - 0 - ], - "unicast-table": [ - ], - "multicast": "normal", - "multicast-overflow": false, - "unicast-overflow": false, - "multicast-table": [ - "01:00:5e:00:00:01", - "33:33:00:00:00:01", - "33:33:ff:12:34:56" - ], - "broadcast-allowed": false - } - ] - } - -blockdev-add ------------- - -Add a block device. - -This command is still a work in progress. It doesn't support all -block drivers among other things. Stay away from it unless you want -to help with its development. - -For the arguments, see the QAPI schema documentation of BlockdevOptions. - -Example (1): - --> { "execute": "blockdev-add", - "arguments": { "driver": "qcow2", - "file": { "driver": "file", - "filename": "test.qcow2" } } } -<- { "return": {} } - -Example (2): - --> { "execute": "blockdev-add", - "arguments": { - "driver": "qcow2", - "node-name": "my_disk", - "discard": "unmap", - "cache": { - "direct": true, - "writeback": true - }, - "file": { - "driver": "file", - "filename": "/tmp/test.qcow2" - }, - "backing": { - "driver": "raw", - "file": { - "driver": "file", - "filename": "/dev/fdset/4" - } - } - } - } - -<- { "return": {} } - -x-blockdev-del ------------- -Since 2.5 - -Deletes a block device that has been added using blockdev-add. -The command will fail if the node is attached to a device or is -otherwise being used. - -This command is still a work in progress and is considered -experimental. Stay away from it unless you want to help with its -development. - -Arguments: - -- "node-name": Name of the graph node to delete (json-string) - -Example: - --> { "execute": "blockdev-add", - "arguments": { - "driver": "qcow2", - "node-name": "node0", - "file": { - "driver": "file", - "filename": "test.qcow2" - } - } - } - -<- { "return": {} } - --> { "execute": "x-blockdev-del", - "arguments": { "node-name": "node0" } - } -<- { "return": {} } - -blockdev-open-tray ------------------- - -Opens a block device's tray. If there is a block driver state tree inserted as a -medium, it will become inaccessible to the guest (but it will remain associated -to the block device, so closing the tray will make it accessible again). - -If the tray was already open before, this will be a no-op. - -Once the tray opens, a DEVICE_TRAY_MOVED event is emitted. There are cases in -which no such event will be generated, these include: -- if the guest has locked the tray, @force is false and the guest does not - respond to the eject request -- if the BlockBackend denoted by @device does not have a guest device attached - to it -- if the guest device does not have an actual tray and is empty, for instance - for floppy disk drives - -Arguments: - -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) -- "force": if false (the default), an eject request will be sent to the guest if - it has locked the tray (and the tray will not be opened immediately); - if true, the tray will be opened regardless of whether it is locked - (json-bool, optional) - -Example: - --> { "execute": "blockdev-open-tray", - "arguments": { "id": "ide0-1-0" } } - -<- { "timestamp": { "seconds": 1418751016, - "microseconds": 716996 }, - "event": "DEVICE_TRAY_MOVED", - "data": { "device": "ide1-cd0", - "id": "ide0-1-0", - "tray-open": true } } - -<- { "return": {} } - -blockdev-close-tray -------------------- - -Closes a block device's tray. If there is a block driver state tree associated -with the block device (which is currently ejected), that tree will be loaded as -the medium. - -If the tray was already closed before, this will be a no-op. - -Arguments: - -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) - -Example: - --> { "execute": "blockdev-close-tray", - "arguments": { "id": "ide0-1-0" } } - -<- { "timestamp": { "seconds": 1418751345, - "microseconds": 272147 }, - "event": "DEVICE_TRAY_MOVED", - "data": { "device": "ide1-cd0", - "id": "ide0-1-0", - "tray-open": false } } - -<- { "return": {} } - -x-blockdev-remove-medium ------------------------- - -Removes a medium (a block driver state tree) from a block device. That block -device's tray must currently be open (unless there is no attached guest device). - -If the tray is open and there is no medium inserted, this will be a no-op. - -This command is still a work in progress and is considered experimental. -Stay away from it unless you want to help with its development. - -Arguments: - -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) - -Example: - --> { "execute": "x-blockdev-remove-medium", - "arguments": { "id": "ide0-1-0" } } - -<- { "error": { "class": "GenericError", - "desc": "Tray of device 'ide0-1-0' is not open" } } - --> { "execute": "blockdev-open-tray", - "arguments": { "id": "ide0-1-0" } } - -<- { "timestamp": { "seconds": 1418751627, - "microseconds": 549958 }, - "event": "DEVICE_TRAY_MOVED", - "data": { "device": "ide1-cd0", - "id": "ide0-1-0", - "tray-open": true } } - -<- { "return": {} } - --> { "execute": "x-blockdev-remove-medium", - "arguments": { "device": "ide0-1-0" } } - -<- { "return": {} } - -x-blockdev-insert-medium ------------------------- - -Inserts a medium (a block driver state tree) into a block device. That block -device's tray must currently be open (unless there is no attached guest device) -and there must be no medium inserted already. - -This command is still a work in progress and is considered experimental. -Stay away from it unless you want to help with its development. - -Arguments: - -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) -- "node-name": root node of the BDS tree to insert into the block device - -Example: - --> { "execute": "blockdev-add", - "arguments": { { "node-name": "node0", - "driver": "raw", - "file": { "driver": "file", - "filename": "fedora.iso" } } } - -<- { "return": {} } - --> { "execute": "x-blockdev-insert-medium", - "arguments": { "id": "ide0-1-0", - "node-name": "node0" } } - -<- { "return": {} } - -x-blockdev-change ------------------ - -Dynamically reconfigure the block driver state graph. It can be used -to add, remove, insert or replace a graph node. Currently only the -Quorum driver implements this feature to add or remove its child. This -is useful to fix a broken quorum child. - -If @node is specified, it will be inserted under @parent. @child -may not be specified in this case. If both @parent and @child are -specified but @node is not, @child will be detached from @parent. - -Arguments: -- "parent": the id or name of the parent node (json-string) -- "child": the name of a child under the given parent node (json-string, optional) -- "node": the name of the node that will be added (json-string, optional) - -Note: this command is experimental, and not a stable API. It doesn't -support all kinds of operations, all kinds of children, nor all block -drivers. - -Warning: The data in a new quorum child MUST be consistent with that of -the rest of the array. - -Example: - -Add a new node to a quorum --> { "execute": "blockdev-add", - "arguments": { "driver": "raw", - "node-name": "new_node", - "file": { "driver": "file", - "filename": "test.raw" } } } -<- { "return": {} } --> { "execute": "x-blockdev-change", - "arguments": { "parent": "disk1", - "node": "new_node" } } -<- { "return": {} } - -Delete a quorum's node --> { "execute": "x-blockdev-change", - "arguments": { "parent": "disk1", - "child": "children.1" } } -<- { "return": {} } - -query-named-block-nodes ------------------------ - -Return a list of BlockDeviceInfo for all the named block driver nodes - -Example: - --> { "execute": "query-named-block-nodes" } -<- { "return": [ { "ro":false, - "drv":"qcow2", - "encrypted":false, - "file":"disks/test.qcow2", - "node-name": "my-node", - "backing_file_depth":1, - "bps":1000000, - "bps_rd":0, - "bps_wr":0, - "iops":1000000, - "iops_rd":0, - "iops_wr":0, - "bps_max": 8000000, - "bps_rd_max": 0, - "bps_wr_max": 0, - "iops_max": 0, - "iops_rd_max": 0, - "iops_wr_max": 0, - "iops_size": 0, - "write_threshold": 0, - "image":{ - "filename":"disks/test.qcow2", - "format":"qcow2", - "virtual-size":2048000, - "backing_file":"base.qcow2", - "full-backing-filename":"disks/base.qcow2", - "backing-filename-format":"qcow2", - "snapshots":[ - { - "id": "1", - "name": "snapshot1", - "vm-state-size": 0, - "date-sec": 10000200, - "date-nsec": 12, - "vm-clock-sec": 206, - "vm-clock-nsec": 30 - } - ], - "backing-image":{ - "filename":"disks/base.qcow2", - "format":"qcow2", - "virtual-size":2048000 - } - } } ] } - -blockdev-change-medium ----------------------- - -Changes the medium inserted into a block device by ejecting the current medium -and loading a new image file which is inserted as the new medium. - -Arguments: - -- "device": block device name (deprecated, use @id instead) - (json-string, optional) -- "id": the name or QOM path of the guest device (json-string, optional) -- "filename": filename of the new image (json-string) -- "format": format of the new image (json-string, optional) -- "read-only-mode": new read-only mode (json-string, optional) - - Possible values: "retain" (default), "read-only", "read-write" - -Examples: - -1. Change a removable medium - --> { "execute": "blockdev-change-medium", - "arguments": { "id": "ide0-1-0", - "filename": "/srv/images/Fedora-12-x86_64-DVD.iso", - "format": "raw" } } -<- { "return": {} } - -2. Load a read-only medium into a writable drive - --> { "execute": "blockdev-change-medium", - "arguments": { "id": "floppyA", - "filename": "/srv/images/ro.img", - "format": "raw", - "read-only-mode": "retain" } } - -<- { "error": - { "class": "GenericError", - "desc": "Could not open '/srv/images/ro.img': Permission denied" } } - --> { "execute": "blockdev-change-medium", - "arguments": { "id": "floppyA", - "filename": "/srv/images/ro.img", - "format": "raw", - "read-only-mode": "read-only" } } - -<- { "return": {} } - -query-memdev ------------- - -Show memory devices information. - - -Example (1): - --> { "execute": "query-memdev" } -<- { "return": [ - { - "size": 536870912, - "merge": false, - "dump": true, - "prealloc": false, - "host-nodes": [0, 1], - "policy": "bind" - }, - { - "size": 536870912, - "merge": false, - "dump": true, - "prealloc": true, - "host-nodes": [2, 3], - "policy": "preferred" - } - ] - } - -query-memory-devices --------------------- - -Return a list of memory devices. - -Example: --> { "execute": "query-memory-devices" } -<- { "return": [ { "data": - { "addr": 5368709120, - "hotpluggable": true, - "hotplugged": true, - "id": "d1", - "memdev": "/objects/memX", - "node": 0, - "size": 1073741824, - "slot": 0}, - "type": "dimm" - } ] } - -query-acpi-ospm-status ----------------------- - -Return list of ACPIOSTInfo for devices that support status reporting -via ACPI _OST method. - -Example: --> { "execute": "query-acpi-ospm-status" } -<- { "return": [ { "device": "d1", "slot": "0", "slot-type": "DIMM", "source": 1, "status": 0}, - { "slot": "1", "slot-type": "DIMM", "source": 0, "status": 0}, - { "slot": "2", "slot-type": "DIMM", "source": 0, "status": 0}, - { "slot": "3", "slot-type": "DIMM", "source": 0, "status": 0} - ]} - -rtc-reset-reinjection ---------------------- - -Reset the RTC interrupt reinjection backlog. - -Arguments: None. - -Example: - --> { "execute": "rtc-reset-reinjection" } -<- { "return": {} } - -trace-event-get-state ---------------------- - -Query the state of events. - -Arguments: - -- "name": Event name pattern (json-string). -- "vcpu": The vCPU to query, any vCPU by default (json-int, optional). - -An event is returned if: -- its name matches the "name" pattern, and -- if "vcpu" is given, the event has the "vcpu" property. - -Therefore, if "vcpu" is given, the operation will only match per-vCPU events, -returning their state on the specified vCPU. Special case: if "name" is an exact -match, "vcpu" is given and the event does not have the "vcpu" property, an error -is returned. - -Example: - --> { "execute": "trace-event-get-state", "arguments": { "name": "qemu_memalign" } } -<- { "return": [ { "name": "qemu_memalign", "state": "disabled" } ] } - -trace-event-set-state ---------------------- - -Set the state of events. - -Arguments: - -- "name": Event name pattern (json-string). -- "enable": Whether to enable or disable the event (json-bool). -- "ignore-unavailable": Whether to ignore errors for events that cannot be - changed (json-bool, optional). -- "vcpu": The vCPU to act upon, all vCPUs by default (json-int, optional). - -An event's state is modified if: -- its name matches the "name" pattern, and -- if "vcpu" is given, the event has the "vcpu" property. - -Therefore, if "vcpu" is given, the operation will only match per-vCPU events, -setting their state on the specified vCPU. Special case: if "name" is an exact -match, "vcpu" is given and the event does not have the "vcpu" property, an error -is returned. - -Example: - --> { "execute": "trace-event-set-state", "arguments": { "name": "qemu_memalign", "enable": "true" } } -<- { "return": {} } - -input-send-event ----------------- - -Send input event to guest. - -Arguments: - -- "device": display device (json-string, optional) -- "head": display head (json-int, optional) -- "events": list of input events - -The consoles are visible in the qom tree, under -/backend/console[$index]. They have a device link and head property, so -it is possible to map which console belongs to which device and display. - -Example (1): - -Press left mouse button. - --> { "execute": "input-send-event", - "arguments": { "device": "video0", - "events": [ { "type": "btn", - "data" : { "down": true, "button": "left" } } ] } } -<- { "return": {} } - --> { "execute": "input-send-event", - "arguments": { "device": "video0", - "events": [ { "type": "btn", - "data" : { "down": false, "button": "left" } } ] } } -<- { "return": {} } - -Example (2): - -Press ctrl-alt-del. - --> { "execute": "input-send-event", - "arguments": { "events": [ - { "type": "key", "data" : { "down": true, - "key": {"type": "qcode", "data": "ctrl" } } }, - { "type": "key", "data" : { "down": true, - "key": {"type": "qcode", "data": "alt" } } }, - { "type": "key", "data" : { "down": true, - "key": {"type": "qcode", "data": "delete" } } } ] } } -<- { "return": {} } - -Example (3): - -Move mouse pointer to absolute coordinates (20000, 400). - --> { "execute": "input-send-event" , - "arguments": { "events": [ - { "type": "abs", "data" : { "axis": "x", "value" : 20000 } }, - { "type": "abs", "data" : { "axis": "y", "value" : 400 } } ] } } -<- { "return": {} } - -block-set-write-threshold ------------- - -Change the write threshold for a block drive. The threshold is an offset, -thus must be non-negative. Default is no write threshold. -Setting the threshold to zero disables it. - -Arguments: - -- "node-name": the node name in the block driver state graph (json-string) -- "write-threshold": the write threshold in bytes (json-int) - -Example: - --> { "execute": "block-set-write-threshold", - "arguments": { "node-name": "mydev", - "write-threshold": 17179869184 } } -<- { "return": {} } - -Show rocker switch ------------------- - -Arguments: - -- "name": switch name - -Example: - --> { "execute": "query-rocker", "arguments": { "name": "sw1" } } -<- { "return": {"name": "sw1", "ports": 2, "id": 1327446905938}} - -Show rocker switch ports ------------------------- - -Arguments: - -- "name": switch name - -Example: - --> { "execute": "query-rocker-ports", "arguments": { "name": "sw1" } } -<- { "return": [ {"duplex": "full", "enabled": true, "name": "sw1.1", - "autoneg": "off", "link-up": true, "speed": 10000}, - {"duplex": "full", "enabled": true, "name": "sw1.2", - "autoneg": "off", "link-up": true, "speed": 10000} - ]} - -Show rocker switch OF-DPA flow tables -------------------------------------- - -Arguments: - -- "name": switch name -- "tbl-id": (optional) flow table ID - -Example: - --> { "execute": "query-rocker-of-dpa-flows", "arguments": { "name": "sw1" } } -<- { "return": [ {"key": {"in-pport": 0, "priority": 1, "tbl-id": 0}, - "hits": 138, - "cookie": 0, - "action": {"goto-tbl": 10}, - "mask": {"in-pport": 4294901760} - }, - {...more...}, - ]} - -Show rocker OF-DPA group tables -------------------------------- - -Arguments: - -- "name": switch name -- "type": (optional) group type - -Example: - --> { "execute": "query-rocker-of-dpa-groups", "arguments": { "name": "sw1" } } -<- { "return": [ {"type": 0, "out-pport": 2, "pport": 2, "vlan-id": 3841, - "pop-vlan": 1, "id": 251723778}, - {"type": 0, "out-pport": 0, "pport": 0, "vlan-id": 3841, - "pop-vlan": 1, "id": 251723776}, - {"type": 0, "out-pport": 1, "pport": 1, "vlan-id": 3840, - "pop-vlan": 1, "id": 251658241}, - {"type": 0, "out-pport": 0, "pport": 0, "vlan-id": 3840, - "pop-vlan": 1, "id": 251658240} - ]} - -query-gic-capabilities ---------------- - -Return a list of GICCapability objects, describing supported GIC -(Generic Interrupt Controller) versions. - -Arguments: None - -Example: - --> { "execute": "query-gic-capabilities" } -<- { "return": [{ "version": 2, "emulated": true, "kernel": false }, - { "version": 3, "emulated": false, "kernel": true } ] } - -Show existing/possible CPUs ---------------------------- - -Arguments: None. - -Example for pseries machine type started with --smp 2,cores=2,maxcpus=4 -cpu POWER8: - --> { "execute": "query-hotpluggable-cpus" } -<- {"return": [ - { "props": { "core-id": 8 }, "type": "POWER8-spapr-cpu-core", - "vcpus-count": 1 }, - { "props": { "core-id": 0 }, "type": "POWER8-spapr-cpu-core", - "vcpus-count": 1, "qom-path": "/machine/unattached/device[0]"} - ]}' - -Example for pc machine type started with --smp 1,maxcpus=2: - -> { "execute": "query-hotpluggable-cpus" } - <- {"return": [ - { - "type": "qemu64-x86_64-cpu", "vcpus-count": 1, - "props": {"core-id": 0, "socket-id": 1, "thread-id": 0} - }, - { - "qom-path": "/machine/unattached/device[0]", - "type": "qemu64-x86_64-cpu", "vcpus-count": 1, - "props": {"core-id": 0, "socket-id": 0, "thread-id": 0} - } - ]} |