This adds a simple QMP command to query the list of block exports. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200924152717.287415-25-kwolf@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
280 lines
7.5 KiB
Python
280 lines
7.5 KiB
Python
# -*- Mode: Python -*-
|
|
# vim: filetype=python
|
|
|
|
##
|
|
# == Block device exports
|
|
##
|
|
|
|
{ 'include': 'sockets.json' }
|
|
|
|
##
|
|
# @NbdServerOptions:
|
|
#
|
|
# Keep this type consistent with the nbd-server-start arguments. The only
|
|
# intended difference is using SocketAddress instead of SocketAddressLegacy.
|
|
#
|
|
# @addr: Address on which to listen.
|
|
# @tls-creds: ID of the TLS credentials object (since 2.6).
|
|
# @tls-authz: ID of the QAuthZ authorization object used to validate
|
|
# the client's x509 distinguished name. This object is
|
|
# is only resolved at time of use, so can be deleted and
|
|
# recreated on the fly while the NBD server is active.
|
|
# If missing, it will default to denying access (since 4.0).
|
|
# @max-connections: The maximum number of connections to allow at the same
|
|
# time, 0 for unlimited. (since 5.2; default: 0)
|
|
#
|
|
# Since: 4.2
|
|
##
|
|
{ 'struct': 'NbdServerOptions',
|
|
'data': { 'addr': 'SocketAddress',
|
|
'*tls-creds': 'str',
|
|
'*tls-authz': 'str',
|
|
'*max-connections': 'uint32' } }
|
|
|
|
##
|
|
# @nbd-server-start:
|
|
#
|
|
# Start an NBD server listening on the given host and port. Block
|
|
# devices can then be exported using @nbd-server-add. The NBD
|
|
# server will present them as named exports; for example, another
|
|
# QEMU instance could refer to them as "nbd:HOST:PORT:exportname=NAME".
|
|
#
|
|
# Keep this type consistent with the NbdServerOptions type. The only intended
|
|
# difference is using SocketAddressLegacy instead of SocketAddress.
|
|
#
|
|
# @addr: Address on which to listen.
|
|
# @tls-creds: ID of the TLS credentials object (since 2.6).
|
|
# @tls-authz: ID of the QAuthZ authorization object used to validate
|
|
# the client's x509 distinguished name. This object is
|
|
# is only resolved at time of use, so can be deleted and
|
|
# recreated on the fly while the NBD server is active.
|
|
# If missing, it will default to denying access (since 4.0).
|
|
# @max-connections: The maximum number of connections to allow at the same
|
|
# time, 0 for unlimited. (since 5.2; default: 0)
|
|
#
|
|
# Returns: error if the server is already running.
|
|
#
|
|
# Since: 1.3.0
|
|
##
|
|
{ 'command': 'nbd-server-start',
|
|
'data': { 'addr': 'SocketAddressLegacy',
|
|
'*tls-creds': 'str',
|
|
'*tls-authz': 'str',
|
|
'*max-connections': 'uint32' } }
|
|
|
|
##
|
|
# @BlockExportOptionsNbd:
|
|
#
|
|
# An NBD block export (options shared between nbd-server-add and the NBD branch
|
|
# of block-export-add).
|
|
#
|
|
# @name: Export name. If unspecified, the @device parameter is used as the
|
|
# export name. (Since 2.12)
|
|
#
|
|
# @description: Free-form description of the export, up to 4096 bytes.
|
|
# (Since 5.0)
|
|
#
|
|
# @writable: Whether clients should be able to write to the device via the
|
|
# NBD connection (default false).
|
|
#
|
|
# @bitmap: Also export the dirty bitmap reachable from @device, so the
|
|
# NBD client can use NBD_OPT_SET_META_CONTEXT with
|
|
# "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0)
|
|
#
|
|
# Since: 5.0
|
|
##
|
|
{ 'struct': 'BlockExportOptionsNbd',
|
|
'data': { '*name': 'str', '*description': 'str',
|
|
'*writable': 'bool', '*bitmap': 'str' } }
|
|
|
|
##
|
|
# @NbdServerAddOptions:
|
|
#
|
|
# An NBD block export.
|
|
#
|
|
# @device: The device name or node name of the node to be exported
|
|
#
|
|
# Since: 5.0
|
|
##
|
|
{ 'struct': 'NbdServerAddOptions',
|
|
'base': 'BlockExportOptionsNbd',
|
|
'data': { 'device': 'str' } }
|
|
|
|
##
|
|
# @nbd-server-add:
|
|
#
|
|
# Export a block node to QEMU's embedded NBD server.
|
|
#
|
|
# The export name will be used as the id for the resulting block export.
|
|
#
|
|
# Returns: error if the server is not running, or export with the same name
|
|
# already exists.
|
|
#
|
|
# Since: 1.3.0
|
|
##
|
|
{ 'command': 'nbd-server-add',
|
|
'data': 'NbdServerAddOptions', 'boxed': true }
|
|
|
|
##
|
|
# @BlockExportRemoveMode:
|
|
#
|
|
# Mode for removing a block export.
|
|
#
|
|
# @safe: Remove export if there are no existing connections, fail otherwise.
|
|
#
|
|
# @hard: Drop all connections immediately and remove export.
|
|
#
|
|
# Potential additional modes to be added in the future:
|
|
#
|
|
# hide: Just hide export from new clients, leave existing connections as is.
|
|
# Remove export after all clients are disconnected.
|
|
#
|
|
# soft: Hide export from new clients, answer with ESHUTDOWN for all further
|
|
# requests from existing clients.
|
|
#
|
|
# Since: 2.12
|
|
##
|
|
{'enum': 'BlockExportRemoveMode', 'data': ['safe', 'hard']}
|
|
|
|
##
|
|
# @nbd-server-remove:
|
|
#
|
|
# Remove NBD export by name.
|
|
#
|
|
# @name: Block export id.
|
|
#
|
|
# @mode: Mode of command operation. See @BlockExportRemoveMode description.
|
|
# Default is 'safe'.
|
|
#
|
|
# Returns: error if
|
|
# - the server is not running
|
|
# - export is not found
|
|
# - mode is 'safe' and there are existing connections
|
|
#
|
|
# Since: 2.12
|
|
##
|
|
{ 'command': 'nbd-server-remove',
|
|
'data': {'name': 'str', '*mode': 'BlockExportRemoveMode'} }
|
|
|
|
##
|
|
# @nbd-server-stop:
|
|
#
|
|
# Stop QEMU's embedded NBD server, and unregister all devices previously
|
|
# added via @nbd-server-add.
|
|
#
|
|
# Since: 1.3.0
|
|
##
|
|
{ 'command': 'nbd-server-stop' }
|
|
|
|
##
|
|
# @BlockExportType:
|
|
#
|
|
# An enumeration of block export types
|
|
#
|
|
# @nbd: NBD export
|
|
#
|
|
# Since: 4.2
|
|
##
|
|
{ 'enum': 'BlockExportType',
|
|
'data': [ 'nbd' ] }
|
|
|
|
##
|
|
# @BlockExportOptions:
|
|
#
|
|
# Describes a block export, i.e. how single node should be exported on an
|
|
# external interface.
|
|
#
|
|
# @id: A unique identifier for the block export (across all export types)
|
|
#
|
|
# @node-name: The node name of the block node to be exported (since: 5.2)
|
|
#
|
|
# @writethrough: If true, caches are flushed after every write request to the
|
|
# export before completion is signalled. (since: 5.2;
|
|
# default: false)
|
|
#
|
|
# Since: 4.2
|
|
##
|
|
{ 'union': 'BlockExportOptions',
|
|
'base': { 'type': 'BlockExportType',
|
|
'id': 'str',
|
|
'node-name': 'str',
|
|
'*writethrough': 'bool' },
|
|
'discriminator': 'type',
|
|
'data': {
|
|
'nbd': 'BlockExportOptionsNbd'
|
|
} }
|
|
|
|
##
|
|
# @block-export-add:
|
|
#
|
|
# Creates a new block export.
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'command': 'block-export-add',
|
|
'data': 'BlockExportOptions', 'boxed': true }
|
|
|
|
##
|
|
# @block-export-del:
|
|
#
|
|
# Request to remove a block export. This drops the user's reference to the
|
|
# export, but the export may still stay around after this command returns until
|
|
# the shutdown of the export has completed.
|
|
#
|
|
# @id: Block export id.
|
|
#
|
|
# @mode: Mode of command operation. See @BlockExportRemoveMode description.
|
|
# Default is 'safe'.
|
|
#
|
|
# Returns: Error if the export is not found or @mode is 'safe' and the export
|
|
# is still in use (e.g. by existing client connections)
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'command': 'block-export-del',
|
|
'data': { 'id': 'str', '*mode': 'BlockExportRemoveMode' } }
|
|
|
|
##
|
|
# @BLOCK_EXPORT_DELETED:
|
|
#
|
|
# Emitted when a block export is removed and its id can be reused.
|
|
#
|
|
# @id: Block export id.
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'event': 'BLOCK_EXPORT_DELETED',
|
|
'data': { 'id': 'str' } }
|
|
|
|
##
|
|
# @BlockExportInfo:
|
|
#
|
|
# Information about a single block export.
|
|
#
|
|
# @id: The unique identifier for the block export
|
|
#
|
|
# @type: The block export type
|
|
#
|
|
# @node-name: The node name of the block node that is exported
|
|
#
|
|
# @shutting-down: True if the export is shutting down (e.g. after a
|
|
# block-export-del command, but before the shutdown has
|
|
# completed)
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'struct': 'BlockExportInfo',
|
|
'data': { 'id': 'str',
|
|
'type': 'BlockExportType',
|
|
'node-name': 'str',
|
|
'shutting-down': 'bool' } }
|
|
|
|
##
|
|
# @query-block-exports:
|
|
#
|
|
# Returns: A list of BlockExportInfo describing all block exports
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'command': 'query-block-exports', 'returns': ['BlockExportInfo'] }
|