diff options
| author | Alberto Garcia <berto@igalia.com> | 2016-10-28 10:08:11 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-10-31 16:52:38 +0100 |
| commit | 554b614765090f47d97a20ca6981e17e96515ec1 (patch) | |
| tree | ac02d0ec44ef4ef174e150b2b7b024e40fc6065d /qapi/block-core.json | |
| parent | 61b49e48b379db45f0ea91c93a61c873695549a9 (diff) | |
block: Add QMP support for streaming to an intermediate layer
This patch makes the 'device' parameter of the 'block-stream' command
accept a node name that is not a root node. The presence of this
feature can't be directly tested with introspection; soon we'll
introduce a 'base-node' parameter whose presence can be checked for
this purpose.
In addition to that, operation blockers will be checked in all
intermediate nodes between the top and the base node.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi/block-core.json')
| -rw-r--r-- | qapi/block-core.json | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index 0f2b7032fc..d7a029cfd5 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1464,6 +1464,13 @@ # with query-block-jobs. The operation can be stopped before it has completed # using the block-job-cancel command. # +# The node that receives the data is called the top image, can be located in +# any part of the chain (but always above the base image; see below) and can be +# specified using its device or node name. Earlier qemu versions only allowed +# 'device' to name the top level node; presence of the 'base-node' parameter +# during introspection can be used as a witness of the enhanced semantics +# of 'device'. +# # If a base file is specified then sectors are not copied from that base file and # its backing chain. When streaming completes the image file will have the base # file as its backing file. This can be used to stream a subset of the backing @@ -1475,12 +1482,12 @@ # @job-id: #optional identifier for the newly-created block job. If # omitted, the device name will be used. (Since 2.7) # -# @device: the device name or node-name of a root node +# @device: the device or node name of the top image # # @base: #optional the common backing file name # -# @backing-file: #optional The backing file string to write into the active -# layer. This filename is not validated. +# @backing-file: #optional The backing file string to write into the top +# image. This filename is not validated. # # If a pathname string is such that it cannot be # resolved by QEMU, that means that subsequent QMP or |