HXCOMM QMP dispatch table and documentation HXCOMM Text between SQMP and EQMP is copied to the QMP documention file and HXCOMM does not show up in the other formats. SQMP 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 (QMP/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. EQMP { .name = "quit", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_quit, }, SQMP quit ---- Quit the emulator. Arguments: None. Example: -> { "execute": "quit" } <- { "return": {} } EQMP { .name = "eject", .args_type = "force:-f,device:B", .mhandler.cmd_new = qmp_marshal_input_eject, }, SQMP eject ----- Eject a removable medium. Arguments: - force: force ejection (json-bool, optional) - device: device name (json-string) Example: -> { "execute": "eject", "arguments": { "device": "ide1-cd0" } } <- { "return": {} } Note: The "force" argument defaults to false. EQMP { .name = "change", .args_type = "device:B,target:F,arg:s?", .mhandler.cmd_new = qmp_marshal_input_change, }, SQMP 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": {} } EQMP { .name = "screendump", .args_type = "filename:F", .mhandler.cmd_new = qmp_marshal_input_screendump, }, SQMP screendump ---------- Save screen into PPM image. Arguments: - "filename": file path (json-string) Example: -> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } } <- { "return": {} } EQMP { .name = "stop", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_stop, }, SQMP stop ---- Stop the emulator. Arguments: None. Example: -> { "execute": "stop" } <- { "return": {} } EQMP { .name = "cont", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_cont, }, SQMP cont ---- Resume emulation. Arguments: None. Example: -> { "execute": "cont" } <- { "return": {} } EQMP { .name = "system_wakeup", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_system_wakeup, }, SQMP system_wakeup ------------- Wakeup guest from suspend. Arguments: None. Example: -> { "execute": "system_wakeup" } <- { "return": {} } EQMP { .name = "system_reset", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_system_reset, }, SQMP system_reset ------------ Reset the system. Arguments: None. Example: -> { "execute": "system_reset" } <- { "return": {} } EQMP { .name = "system_powerdown", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_system_powerdown, }, SQMP system_powerdown ---------------- Send system power down event. Arguments: None. Example: -> { "execute": "system_powerdown" } <- { "return": {} } EQMP { .name = "device_add", .args_type = "device:O", .params = "driver[,prop=value][,...]", .help = "add device, like -device on the command line", .user_print = monitor_user_noop, .mhandler.cmd_new = do_device_add, }, SQMP 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 EQMP { .name = "device_del", .args_type = "id:s", .mhandler.cmd_new = qmp_marshal_input_device_del, }, SQMP device_del ---------- Remove a device. Arguments: - "id": the device's ID (json-string) Example: -> { "execute": "device_del", "arguments": { "id": "net1" } } <- { "return": {} } EQMP { .name = "send-key", .args_type = "keys:O,hold-time:i?", .mhandler.cmd_new = qmp_marshal_input_send_key, }, SQMP 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": {} } EQMP { .name = "cpu", .args_type = "index:i", .mhandler.cmd_new = qmp_marshal_input_cpu, }, SQMP 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. EQMP { .name = "cpu-add", .args_type = "id:i", .mhandler.cmd_new = qmp_marshal_input_cpu_add, }, SQMP cpu-add ------- Adds virtual cpu Arguments: - "id": cpu id (json-int) Example: -> { "execute": "cpu-add", "arguments": { "id": 2 } } <- { "return": {} } EQMP { .name = "memsave", .args_type = "val:l,size:i,filename:s,cpu:i?", .mhandler.cmd_new = qmp_marshal_input_memsave, }, SQMP 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": {} } EQMP { .name = "pmemsave", .args_type = "val:l,size:i,filename:s", .mhandler.cmd_new = qmp_marshal_input_pmemsave, }, SQMP 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": {} } EQMP { .name = "inject-nmi", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_inject_nmi, }, SQMP inject-nmi ---------- Inject an NMI on guest's CPUs. Arguments: None. Example: -> { "execute": "inject-nmi" } <- { "return": {} } Note: inject-nmi fails when the guest doesn't support injecting. Currently, only x86 (NMI) and s390x (RESTART) guests do. EQMP { .name = "ringbuf-write", .args_type = "device:s,data:s,format:s?", .mhandler.cmd_new = qmp_marshal_input_ringbuf_write, }, SQMP 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" Bug: invalid base64 is currently not rejected. Whitespace *is* invalid. Example: -> { "execute": "ringbuf-write", "arguments": { "device": "foo", "data": "abcdefgh", "format": "utf8" } } <- { "return": {} } EQMP { .name = "ringbuf-read", .args_type = "device:s,size:i,format:s?", .mhandler.cmd_new = qmp_marshal_input_ringbuf_read, }, SQMP 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"} EQMP { .name = "xen-save-devices-state", .args_type = "filename:F", .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state, }, SQMP 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": {} } EQMP { .name = "xen-set-global-dirty-log", .args_type = "enable:b", .mhandler.cmd_new = qmp_marshal_input_xen_set_global_dirty_log, }, SQMP 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": {} } EQMP { .name = "migrate", .args_type = "detach:-d,blk:-b,inc:-i,uri:s", .mhandler.cmd_new = qmp_marshal_input_migrate, }, SQMP 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 EQMP { .name = "migrate_cancel", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_migrate_cancel, }, SQMP migrate_cancel -------------- Cancel the current migration. Arguments: None. Example: -> { "execute": "migrate_cancel" } <- { "return": {} } EQMP { .name = "migrate-set-cache-size", .args_type = "value:o", .mhandler.cmd_new = qmp_marshal_input_migrate_set_cache_size, }, SQMP 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": {} } EQMP { .name = "query-migrate-cache-size", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_migrate_cache_size, }, SQMP 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 } EQMP { .name = "migrate_set_speed", .args_type = "value:o", .mhandler.cmd_new = qmp_marshal_input_migrate_set_speed, }, SQMP 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": {} } EQMP { .name = "migrate_set_downtime", .args_type = "value:T", .mhandler.cmd_new = qmp_marshal_input_migrate_set_downtime, }, SQMP 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": {} } EQMP { .name = "client_migrate_info", .args_type = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?", .params = "protocol hostname port tls-port cert-subject", .help = "send migration info to spice/vnc client", .user_print = monitor_user_noop, .mhandler.cmd_async = client_migrate_info, .flags = MONITOR_CMD_ASYNC, }, SQMP client_migrate_info ------------------ Set the spice/vnc connection info for the migration target. The spice/vnc server will ask the spice/vnc client to automatically reconnect using the new parameters (if specified) once the vm migration finished successfully. Arguments: - "protocol": protocol: "spice" or "vnc" (json-string) - "hostname": migration target hostname (json-string) - "port": spice/vnc 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": {} } EQMP { .name = "dump-guest-memory", .args_type = "paging:b,protocol:s,begin:i?,end:i?,format:s?", .params = "-p protocol [begin] [length] [format]", .help = "dump guest memory to file", .user_print = monitor_user_noop, .mhandler.cmd_new = qmp_marshal_input_dump_guest_memory, }, SQMP 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) - "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 EQMP { .name = "query-dump-guest-memory-capability", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_dump_guest_memory_capability, }, SQMP 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"] } EQMP { .name = "netdev_add", .args_type = "netdev:O", .mhandler.cmd_new = qmp_netdev_add, }, SQMP 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" } } <- { "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 EQMP { .name = "netdev_del", .args_type = "id:s", .mhandler.cmd_new = qmp_marshal_input_netdev_del, }, SQMP 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": {} } EQMP { .name = "object-add", .args_type = "qom-type:s,id:s,props:q?", .mhandler.cmd_new = qmp_object_add, }, SQMP 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": {} } EQMP { .name = "object-del", .args_type = "id:s", .mhandler.cmd_new = qmp_marshal_input_object_del, }, SQMP object-del ---------- Remove QOM object. Arguments: - "id": the object's ID (json-string) Example: -> { "execute": "object-del", "arguments": { "id": "rng1" } } <- { "return": {} } EQMP { .name = "block_resize", .args_type = "device:s?,node-name:s?,size:o", .mhandler.cmd_new = qmp_marshal_input_block_resize, }, SQMP 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": {} } EQMP { .name = "block-stream", .args_type = "device:B,base:s?,speed:o?,on-error:s?", .mhandler.cmd_new = qmp_marshal_input_block_stream, }, { .name = "block-commit", .args_type = "device:B,base:s?,top:s,speed:o?", .mhandler.cmd_new = qmp_marshal_input_block_commit, }, SQMP block-commit ------------ Live commit of data from overlay image nodes into backing nodes - i.e., writes data between 'top' and 'base' into 'base'. Arguments: - "device": The device's ID, must be unique (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 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": {} } EQMP { .name = "drive-backup", .args_type = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?," "on-source-error:s?,on-target-error:s?", .mhandler.cmd_new = qmp_marshal_input_drive_backup, }, SQMP 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: - "device": the name of the device 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, or "none" to only replicate new I/O (MirrorSyncMode). - "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) - "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": {} } EQMP { .name = "block-job-set-speed", .args_type = "device:B,speed:o", .mhandler.cmd_new = qmp_marshal_input_block_job_set_speed, }, { .name = "block-job-cancel", .args_type = "device:B,force:b?", .mhandler.cmd_new = qmp_marshal_input_block_job_cancel, }, { .name = "block-job-pause", .args_type = "device:B", .mhandler.cmd_new = qmp_marshal_input_block_job_pause, }, { .name = "block-job-resume", .args_type = "device:B", .mhandler.cmd_new = qmp_marshal_input_block_job_resume, }, { .name = "block-job-complete", .args_type = "device:B", .mhandler.cmd_new = qmp_marshal_input_block_job_complete, }, { .name = "transaction", .args_type = "actions:q", .mhandler.cmd_new = qmp_marshal_input_transaction, }, SQMP transaction ----------- Atomically operate on one or more block devices. The only supported operations for now are drive-backup, internal and external snapshotting. 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. The only supported value is "blockdev-snapshot-sync". (json-string) - "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": device name 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": {} } EQMP { .name = "blockdev-snapshot-sync", .args_type = "device:s?,node-name:s?,snapshot-file:s,snapshot-node-name:s?,format:s?,mode:s?", .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_sync, }, SQMP 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": {} } EQMP { .name = "blockdev-snapshot-internal-sync", .args_type = "device:B,name:s", .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_internal_sync, }, SQMP 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": device name 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": {} } EQMP { .name = "blockdev-snapshot-delete-internal-sync", .args_type = "device:B,id:s?,name:s?", .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_delete_internal_sync, }, SQMP 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": device name (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 } } EQMP { .name = "drive-mirror", .args_type = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?," "on-source-error:s?,on-target-error:s?," "granularity:i?,buf-size:i?", .mhandler.cmd_new = qmp_marshal_input_drive_mirror, }, SQMP 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: - "device": device name to operate on (json-string) - "target": name of new image file (json-string) - "format": format of new image (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') 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": {} } EQMP { .name = "balloon", .args_type = "value:M", .mhandler.cmd_new = qmp_marshal_input_balloon, }, SQMP balloon ------- Request VM to change its memory allocation (in bytes). Arguments: - "value": New memory allocation (json-int) Example: -> { "execute": "balloon", "arguments": { "value": 536870912 } } <- { "return": {} } EQMP { .name = "set_link", .args_type = "name:s,up:b", .mhandler.cmd_new = qmp_marshal_input_set_link, }, SQMP 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": {} } EQMP { .name = "getfd", .args_type = "fdname:s", .params = "getfd name", .help = "receive a file descriptor via SCM rights and assign it a name", .mhandler.cmd_new = qmp_marshal_input_getfd, }, SQMP 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. EQMP { .name = "closefd", .args_type = "fdname:s", .params = "closefd name", .help = "close a file descriptor previously passed via SCM rights", .mhandler.cmd_new = qmp_marshal_input_closefd, }, SQMP closefd ------- Close a file descriptor previously passed via SCM rights. Arguments: - "fdname": file descriptor name (json-string) Example: -> { "execute": "closefd", "arguments": { "fdname": "fd1" } } <- { "return": {} } EQMP { .name = "add-fd", .args_type = "fdset-id:i?,opaque:s?", .params = "add-fd fdset-id opaque", .help = "Add a file descriptor, that was passed via SCM rights, to an fd set", .mhandler.cmd_new = qmp_marshal_input_add_fd, }, SQMP 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. EQMP { .name = "remove-fd", .args_type = "fdset-id:i,fd:i?", .params = "remove-fd fdset-id fd", .help = "Remove a file descriptor from an fd set", .mhandler.cmd_new = qmp_marshal_input_remove_fd, }, SQMP 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. EQMP { .name = "query-fdsets", .args_type = "", .help = "Return information describing all fd sets", .mhandler.cmd_new = qmp_marshal_input_query_fdsets, }, SQMP 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. EQMP { .name = "block_passwd", .args_type = "device:s?,node-name:s?,password:s", .mhandler.cmd_new = qmp_marshal_input_block_passwd, }, SQMP 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": {} } EQMP { .name = "block_set_io_throttle", .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?,iops_size:l?", .mhandler.cmd_new = qmp_marshal_input_block_set_io_throttle, }, SQMP block_set_io_throttle ------------ Change I/O throttle limits for a block drive. Arguments: - "device": device name (json-string) - "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 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 in bytes when limiting (json-int) Example: -> { "execute": "block_set_io_throttle", "arguments": { "device": "virtio0", "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, "iops_size": 0 } } <- { "return": {} } EQMP { .name = "set_password", .args_type = "protocol:s,password:s,connected:s?", .mhandler.cmd_new = qmp_marshal_input_set_password, }, SQMP set_password ------------ Set the password for vnc/spice protocols. Arguments: - "protocol": protocol name (json-string) - "password": password (json-string) - "connected": [ keep | disconnect | fail ] (josn-string, optional) Example: -> { "execute": "set_password", "arguments": { "protocol": "vnc", "password": "secret" } } <- { "return": {} } EQMP { .name = "expire_password", .args_type = "protocol:s,time:s", .mhandler.cmd_new = qmp_marshal_input_expire_password, }, SQMP 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": {} } EQMP { .name = "add_client", .args_type = "protocol:s,fdname:s,skipauth:b?,tls:b?", .mhandler.cmd_new = qmp_marshal_input_add_client, }, SQMP 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": {} } EQMP { .name = "qmp_capabilities", .args_type = "", .params = "", .help = "enable QMP capabilities", .user_print = monitor_user_noop, .mhandler.cmd_new = do_qmp_capabilities, }, SQMP qmp_capabilities ---------------- Enable QMP capabilities. Arguments: None. Example: -> { "execute": "qmp_capabilities" } <- { "return": {} } Note: This command must be issued before issuing any other command. EQMP { .name = "human-monitor-command", .args_type = "command-line:s,cpu-index:i?", .mhandler.cmd_new = qmp_marshal_input_human_monitor_command, }, SQMP 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 ================= HXCOMM Each query command below is inside a SQMP/EQMP section, do NOT change HXCOMM this! We will possibly move query commands definitions inside those HXCOMM sections, just like regular commands. EQMP SQMP 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":"" } } EQMP { .name = "query-version", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_version, }, SQMP 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. EQMP { .name = "query-commands", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_commands, }, SQMP 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. EQMP { .name = "query-events", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_events, }, SQMP 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) Example: -> { "execute": "query-chardev" } <- { "return":[ { "label":"monitor", "filename":"stdio" }, { "label":"serial0", "filename":"vc" } ] } EQMP { .name = "query-chardev", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_chardev, }, SQMP 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" } ] } EQMP { .name = "query-chardev-backends", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_chardev_backends, }, SQMP 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", "cow", "dmg", "file", "file", "ftp", "ftps", "host_cdrom", "host_device", "host_floppy", "http", "https", "nbd", "parallels", "qcow", "qcow2", "raw", "tftp", "vdi", "vmdk", "vpc", "vvfat" - "backing_file": 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" - "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", "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" } ] } EQMP { .name = "query-block", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_block, }, SQMP 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": Highest offset of a sector written since the BlockDriverState has been opened (json-int) - "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, } }, "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 } }, { "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 } }, { "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 } }, { "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 } } ] } EQMP { .name = "query-blockstats", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_blockstats, }, SQMP 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) - 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, "pc":3227107138 "thread_id":3134 }, { "CPU":1, "current":false, "halted":true, "pc":7108165 "thread_id":3135 } ] } EQMP { .name = "query-cpus", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_cpus, }, SQMP 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 } ] } EQMP { .name = "query-iothreads", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_iothreads, }, SQMP 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. EQMP { .name = "query-pci", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_pci, }, SQMP 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 } } EQMP { .name = "query-kvm", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_kvm, }, SQMP 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" } } EQMP { .name = "query-status", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_status, }, SQMP 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 } ] } EQMP { .name = "query-mice", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_mice, }, SQMP 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" } ] } } EQMP { .name = "query-vnc", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_vnc, }, SQMP 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": whevener 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 ... ] ] } } EQMP #if defined(CONFIG_SPICE) { .name = "query-spice", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_spice, }, #endif SQMP 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" } } EQMP { .name = "query-name", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_name, }, SQMP 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" } } EQMP { .name = "query-uuid", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_uuid, }, SQMP 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" } ] } EQMP { .name = "query-command-line-options", .args_type = "option:s?", .mhandler.cmd_new = qmp_marshal_input_query_command_line_options, }, SQMP 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 } } } EQMP { .name = "query-migrate", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_migrate, }, SQMP migrate-set-capabilities ------------------------ Enable/Disable migration capabilities - "xbzrle": XBZRLE support Arguments: Example: -> { "execute": "migrate-set-capabilities" , "arguments": { "capabilities": [ { "capability": "xbzrle", "state": true } ] } } EQMP { .name = "migrate-set-capabilities", .args_type = "capabilities:O", .params = "capability:s,state:b", .mhandler.cmd_new = qmp_marshal_input_migrate_set_capabilities, }, SQMP query-migrate-capabilities -------------------------- Query current migration capabilities - "capabilities": migration capabilities state - "xbzrle" : XBZRLE state (json-bool) Arguments: Example: -> { "execute": "query-migrate-capabilities" } <- { "return": [ { "state": false, "capability": "xbzrle" } ] } EQMP { .name = "query-migrate-capabilities", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_migrate_capabilities, }, SQMP 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, } } EQMP { .name = "query-balloon", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_balloon, }, { .name = "query-block-jobs", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_block_jobs, }, { .name = "qom-list", .args_type = "path:s", .mhandler.cmd_new = qmp_marshal_input_qom_list, }, { .name = "qom-set", .args_type = "path:s,property:s,value:q", .mhandler.cmd_new = qmp_qom_set, }, { .name = "qom-get", .args_type = "path:s,property:s", .mhandler.cmd_new = qmp_qom_get, }, { .name = "nbd-server-start", .args_type = "addr:q", .mhandler.cmd_new = qmp_marshal_input_nbd_server_start, }, { .name = "nbd-server-add", .args_type = "device:B,writable:b?", .mhandler.cmd_new = qmp_marshal_input_nbd_server_add, }, { .name = "nbd-server-stop", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_nbd_server_stop, }, { .name = "change-vnc-password", .args_type = "password:s", .mhandler.cmd_new = qmp_marshal_input_change_vnc_password, }, { .name = "qom-list-types", .args_type = "implements:s?,abstract:b?", .mhandler.cmd_new = qmp_marshal_input_qom_list_types, }, { .name = "device-list-properties", .args_type = "typename:s", .mhandler.cmd_new = qmp_marshal_input_device_list_properties, }, { .name = "query-machines", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_machines, }, { .name = "query-cpu-definitions", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_cpu_definitions, }, { .name = "query-target", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_target, }, { .name = "query-tpm", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_tpm, }, SQMP 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" } ] } EQMP { .name = "query-tpm-models", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_tpm_models, }, SQMP query-tpm-models ---------------- Return a list of supported TPM models. Arguments: None Example: -> { "execute": "query-tpm-models" } <- { "return": [ "tpm-tis" ] } EQMP { .name = "query-tpm-types", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_tpm_types, }, SQMP query-tpm-types --------------- Return a list of supported TPM types. Arguments: None Example: -> { "execute": "query-tpm-types" } <- { "return": [ "passthrough" ] } EQMP { .name = "chardev-add", .args_type = "id:s,backend:q", .mhandler.cmd_new = qmp_marshal_input_chardev_add, }, SQMP 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" } } EQMP { .name = "chardev-remove", .args_type = "id:s", .mhandler.cmd_new = qmp_marshal_input_chardev_remove, }, SQMP 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": {} } EQMP { .name = "query-rx-filter", .args_type = "name:s?", .mhandler.cmd_new = qmp_marshal_input_query_rx_filter, }, SQMP 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 } ] } EQMP { .name = "blockdev-add", .args_type = "options:q", .mhandler.cmd_new = qmp_marshal_input_blockdev_add, }, SQMP blockdev-add ------------ Add a block device. Arguments: - "options": block driver options Example (1): -> { "execute": "blockdev-add", "arguments": { "options" : { "driver": "qcow2", "file": { "driver": "file", "filename": "test.qcow2" } } } } <- { "return": {} } Example (2): -> { "execute": "blockdev-add", "arguments": { "options": { "driver": "qcow2", "id": "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": {} } EQMP { .name = "query-named-block-nodes", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_named_block_nodes, }, SQMP @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, "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 } } } ] } EQMP { .name = "query-memdev", .args_type = "", .mhandler.cmd_new = qmp_marshal_input_query_memdev, }, SQMP 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" } ] } EQMP