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authorVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>2018-12-21 20:09:07 +0300
committerMax Reitz <mreitz@redhat.com>2019-01-31 00:38:19 +0100
commit5d3b4e99463642b226d1a37433d0e4b376162468 (patch)
tree10104806d3367656755bdf1190730f00e151e30e /qapi
parentb4fbe1f65a4769c09e6bf2d79fc84360f840f40e (diff)
qapi: add x-debug-query-block-graph
Add a new command, returning block nodes (and their users) graph. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-id: 20181221170909.25584-2-vsementsov@virtuozzo.com Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'qapi')
-rw-r--r--qapi/block-core.json108
1 files changed, 108 insertions, 0 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 91685be6c2..cde1b53708 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1666,6 +1666,114 @@
{ 'command': 'query-named-block-nodes', 'returns': [ 'BlockDeviceInfo' ] }
##
+# @XDbgBlockGraphNodeType:
+#
+# @block-backend: corresponds to BlockBackend
+#
+# @block-job: corresonds to BlockJob
+#
+# @block-driver: corresponds to BlockDriverState
+#
+# Since: 4.0
+##
+{ 'enum': 'XDbgBlockGraphNodeType',
+ 'data': [ 'block-backend', 'block-job', 'block-driver' ] }
+
+##
+# @XDbgBlockGraphNode:
+#
+# @id: Block graph node identifier. This @id is generated only for
+# x-debug-query-block-graph and does not relate to any other identifiers in
+# Qemu.
+#
+# @type: Type of graph node. Can be one of block-backend, block-job or
+# block-driver-state.
+#
+# @name: Human readable name of the node. Corresponds to node-name for
+# block-driver-state nodes; is not guaranteed to be unique in the whole
+# graph (with block-jobs and block-backends).
+#
+# Since: 4.0
+##
+{ 'struct': 'XDbgBlockGraphNode',
+ 'data': { 'id': 'uint64', 'type': 'XDbgBlockGraphNodeType', 'name': 'str' } }
+
+##
+# @BlockPermission:
+#
+# Enum of base block permissions.
+#
+# @consistent-read: A user that has the "permission" of consistent reads is
+# guaranteed that their view of the contents of the block
+# device is complete and self-consistent, representing the
+# contents of a disk at a specific point.
+# For most block devices (including their backing files) this
+# is true, but the property cannot be maintained in a few
+# situations like for intermediate nodes of a commit block
+# job.
+#
+# @write: This permission is required to change the visible disk contents.
+#
+# @write-unchanged: This permission (which is weaker than BLK_PERM_WRITE) is
+# both enough and required for writes to the block node when
+# the caller promises that the visible disk content doesn't
+# change.
+# As the BLK_PERM_WRITE permission is strictly stronger,
+# either is sufficient to perform an unchanging write.
+#
+# @resize: This permission is required to change the size of a block node.
+#
+# @graph-mod: This permission is required to change the node that this
+# BdrvChild points to.
+#
+# Since: 4.0
+##
+ { 'enum': 'BlockPermission',
+ 'data': [ 'consistent-read', 'write', 'write-unchanged', 'resize',
+ 'graph-mod' ] }
+##
+# @XDbgBlockGraphEdge:
+#
+# Block Graph edge description for x-debug-query-block-graph.
+#
+# @parent: parent id
+#
+# @child: child id
+#
+# @name: name of the relation (examples are 'file' and 'backing')
+#
+# @perm: granted permissions for the parent operating on the child
+#
+# @shared-perm: permissions that can still be granted to other users of the
+# child while it is still attached to this parent
+#
+# Since: 4.0
+##
+{ 'struct': 'XDbgBlockGraphEdge',
+ 'data': { 'parent': 'uint64', 'child': 'uint64',
+ 'name': 'str', 'perm': [ 'BlockPermission' ],
+ 'shared-perm': [ 'BlockPermission' ] } }
+
+##
+# @XDbgBlockGraph:
+#
+# Block Graph - list of nodes and list of edges.
+#
+# Since: 4.0
+##
+{ 'struct': 'XDbgBlockGraph',
+ 'data': { 'nodes': ['XDbgBlockGraphNode'], 'edges': ['XDbgBlockGraphEdge'] } }
+
+##
+# @x-debug-query-block-graph:
+#
+# Get the block graph.
+#
+# Since: 4.0
+##
+{ 'command': 'x-debug-query-block-graph', 'returns': 'XDbgBlockGraph' }
+
+##
# @drive-mirror:
#
# Start mirroring a block device's writes to a new destination. target