block: Move sysemu QMP commands to QAPI block module

QMP commands that are related to the system emulator and don't make
sense in the context of tools such as qemu-storage-daemon should live in
qapi/block.json rather than qapi/block-core.json. Move them there.

The associated data types are actually also used in code shared with the
tools, so they stay in block-core.json.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200224143008.13362-6-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 386 insertions, 0 deletions

diff --git a/qapi/block.json b/qapi/block.json
index d2f3fc0..97bf52b 100644
--- a/qapi/block.json
+++ b/qapi/block.json
@@ -116,6 +116,248 @@
             '*force': 'bool' } }
 
 ##
+# @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
+#
+# @device: Block device name (deprecated, use @id instead)
+#
+# @id: The name or QOM path of the guest device (since: 2.8)
+#
+# @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
+#
+# Since: 2.5
+#
+# 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": {} }
+#
+##
+{ 'command': 'blockdev-open-tray',
+  'data': { '*device': 'str',
+            '*id': 'str',
+            '*force': 'bool' } }
+
+##
+# @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.
+#
+# @device: Block device name (deprecated, use @id instead)
+#
+# @id: The name or QOM path of the guest device (since: 2.8)
+#
+# Since: 2.5
+#
+# 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": {} }
+#
+##
+{ 'command': 'blockdev-close-tray',
+  'data': { '*device': 'str',
+            '*id': 'str' } }
+
+##
+# @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.
+#
+# @id: The name or QOM path of the guest device
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "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": "blockdev-remove-medium",
+#      "arguments": { "id": "ide0-1-0" } }
+#
+# <- { "return": {} }
+#
+##
+{ 'command': 'blockdev-remove-medium',
+  'data': { 'id': 'str' } }
+
+##
+# @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.
+#
+# @id: The name or QOM path of the guest device
+#
+# @node-name: name of a node in the block driver state graph
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "blockdev-add",
+#      "arguments": {
+#          "node-name": "node0",
+#          "driver": "raw",
+#          "file": { "driver": "file",
+#                    "filename": "fedora.iso" } } }
+# <- { "return": {} }
+#
+# -> { "execute": "blockdev-insert-medium",
+#      "arguments": { "id": "ide0-1-0",
+#                     "node-name": "node0" } }
+#
+# <- { "return": {} }
+#
+##
+{ 'command': 'blockdev-insert-medium',
+  'data': { 'id': 'str',
+            'node-name': 'str'} }
+
+
+##
+# @BlockdevChangeReadOnlyMode:
+#
+# Specifies the new read-only mode of a block device subject to the
+# @blockdev-change-medium command.
+#
+# @retain: Retains the current read-only mode
+#
+# @read-only: Makes the device read-only
+#
+# @read-write: Makes the device writable
+#
+# Since: 2.3
+#
+##
+{ 'enum': 'BlockdevChangeReadOnlyMode',
+  'data': ['retain', 'read-only', 'read-write'] }
+
+
+##
+# @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 (this command
+# combines blockdev-open-tray, blockdev-remove-medium, blockdev-insert-medium
+# and blockdev-close-tray).
+#
+# @device: Block device name (deprecated, use @id instead)
+#
+# @id: The name or QOM path of the guest device
+#      (since: 2.8)
+#
+# @filename: filename of the new image to be loaded
+#
+# @format: format to open the new image with (defaults to
+#          the probed format)
+#
+# @read-only-mode: change the read-only mode of the device; defaults
+#                  to 'retain'
+#
+# Since: 2.5
+#
+# 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": {} }
+#
+##
+{ 'command': 'blockdev-change-medium',
+  'data': { '*device': 'str',
+            '*id': 'str',
+            'filename': 'str',
+            '*format': 'str',
+            '*read-only-mode': 'BlockdevChangeReadOnlyMode' } }
+
+
+##
 # @DEVICE_TRAY_MOVED:
 #
 # Emitted whenever the tray of a removable device is moved by the guest or by
@@ -167,3 +409,147 @@
 ##
 { 'event': 'PR_MANAGER_STATUS_CHANGED',
   'data': { 'id': 'str', 'connected': 'bool' } }
+
+##
+# @block_set_io_throttle:
+#
+# Change I/O throttle limits for a block drive.
+#
+# Since QEMU 2.4, each device with I/O limits is member of a throttle
+# group.
+#
+# If two or more devices are members of the same group, the limits
+# will apply to the combined I/O of the whole group in a round-robin
+# fashion. Therefore, setting new I/O limits to a device will affect
+# the whole group.
+#
+# The name of the group can be specified using the 'group' parameter.
+# If the parameter is unset, it is assumed to be the current group of
+# that device. If it's not in any group yet, the name of the device
+# will be used as the name for its group.
+#
+# The 'group' parameter can also be used to move a device to a
+# different group. In this case the limits specified in the parameters
+# will be applied to the new group only.
+#
+# I/O limits can be disabled by setting all of them to 0. In this case
+# the device will be removed from its group and the rest of its
+# members will not be affected. The 'group' parameter is ignored.
+#
+# Returns: - Nothing on success
+#          - If @device is not a valid block device, DeviceNotFound
+#
+# Since: 1.1
+#
+# Example:
+#
+# -> { "execute": "block_set_io_throttle",
+#      "arguments": { "id": "virtio-blk-pci0/virtio-backend",
+#                     "bps": 0,
+#                     "bps_rd": 0,
+#                     "bps_wr": 0,
+#                     "iops": 512,
+#                     "iops_rd": 0,
+#                     "iops_wr": 0,
+#                     "bps_max": 0,
+#                     "bps_rd_max": 0,
+#                     "bps_wr_max": 0,
+#                     "iops_max": 0,
+#                     "iops_rd_max": 0,
+#                     "iops_wr_max": 0,
+#                     "bps_max_length": 0,
+#                     "iops_size": 0 } }
+# <- { "return": {} }
+#
+# -> { "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": {} }
+##
+{ 'command': 'block_set_io_throttle', 'boxed': true,
+  'data': 'BlockIOThrottle' }
+
+##
+# @block-latency-histogram-set:
+#
+# Manage read, write and flush latency histograms for the device.
+#
+# If only @id parameter is specified, remove all present latency histograms
+# for the device. Otherwise, add/reset some of (or all) latency histograms.
+#
+# @id: The name or QOM path of the guest device.
+#
+# @boundaries: list of interval boundary values (see description in
+#              BlockLatencyHistogramInfo definition). If specified, all
+#              latency histograms are removed, and empty ones created for all
+#              io types with intervals corresponding to @boundaries (except for
+#              io types, for which specific boundaries are set through the
+#              following parameters).
+#
+# @boundaries-read: list of interval boundary values for read latency
+#                   histogram. If specified, old read latency histogram is
+#                   removed, and empty one created with intervals
+#                   corresponding to @boundaries-read. The parameter has higher
+#                   priority then @boundaries.
+#
+# @boundaries-write: list of interval boundary values for write latency
+#                    histogram.
+#
+# @boundaries-flush: list of interval boundary values for flush latency
+#                    histogram.
+#
+# Returns: error if device is not found or any boundary arrays are invalid.
+#
+# Since: 4.0
+#
+# Example: set new histograms for all io types with intervals
+# [0, 10), [10, 50), [50, 100), [100, +inf):
+#
+# -> { "execute": "block-latency-histogram-set",
+#      "arguments": { "id": "drive0",
+#                     "boundaries": [10, 50, 100] } }
+# <- { "return": {} }
+#
+# Example: set new histogram only for write, other histograms will remain
+# not changed (or not created):
+#
+# -> { "execute": "block-latency-histogram-set",
+#      "arguments": { "id": "drive0",
+#                     "boundaries-write": [10, 50, 100] } }
+# <- { "return": {} }
+#
+# Example: set new histograms with the following intervals:
+#   read, flush: [0, 10), [10, 50), [50, 100), [100, +inf)
+#   write: [0, 1000), [1000, 5000), [5000, +inf)
+#
+# -> { "execute": "block-latency-histogram-set",
+#      "arguments": { "id": "drive0",
+#                     "boundaries": [10, 50, 100],
+#                     "boundaries-write": [1000, 5000] } }
+# <- { "return": {} }
+#
+# Example: remove all latency histograms:
+#
+# -> { "execute": "block-latency-histogram-set",
+#      "arguments": { "id": "drive0" } }
+# <- { "return": {} }
+##
+{ 'command': 'block-latency-histogram-set',
+  'data': {'id': 'str',
+           '*boundaries': ['uint64'],
+           '*boundaries-read': ['uint64'],
+           '*boundaries-write': ['uint64'],
+           '*boundaries-flush': ['uint64'] } }