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| author | Max Reitz <mreitz@redhat.com> | 2019-06-12 17:48:11 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2020-09-07 12:31:31 +0200 |
| commit | 67acfd21885b70ae0cd11f12e34821be3d8b90bb (patch) | |
| tree | 6f7762c221d6ff3f988e42bb93147ac9e59ae88e /qapi | |
| parent | cb8503159a46f862303680816b1768bef78ac4e3 (diff) | |
| download | qemu-67acfd21885b70ae0cd11f12e34821be3d8b90bb.zip qemu-67acfd21885b70ae0cd11f12e34821be3d8b90bb.tar.gz qemu-67acfd21885b70ae0cd11f12e34821be3d8b90bb.tar.bz2 | |
stream: Deal with filters
Because of the (not so recent anymore) changes that make the stream job
independent of the base node and instead track the node above it, we
have to split that "bottom" node into two cases: The bottom COW node,
and the node directly above the base node (which may be an R/W filter
or the bottom COW node).
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'qapi')
| -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 55b58ba..b04df13 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2484,13 +2484,20 @@ # 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 -# file chain instead of flattening the entire image. +# its backing chain. This can be used to stream a subset of the backing file +# chain instead of flattening the entire image. +# When streaming completes the image file will have the base file as its backing +# file, unless that node was changed while the job was running. In that case, +# base's parent's backing (or filtered, whichever exists) child (i.e., base at +# the beginning of the job) will be the new backing file. # # On successful completion the image file is updated to drop the backing file # and the BLOCK_JOB_COMPLETED event is emitted. # +# In case @device is a filter node, block-stream modifies the first non-filter +# overlay node below it to point to the new backing node instead of modifying +# @device itself. +# # @job-id: identifier for the newly-created block job. If # omitted, the device name will be used. (Since 2.7) # |