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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2017-12-06 14:45:49 +0000 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2017-12-19 10:25:09 +0000 |
| commit | ca00bbb153d03c5338d8c8136812163f463f841e (patch) | |
| tree | f19554fdfcb729ab19676835cafea1bb0069ccd5 /qapi | |
| parent | fbcc6923b00c2b468a7470fec7863f0403a65736 (diff) | |
blockdev: add x-blockdev-set-iothread testing command
Currently there is no easy way for iotests to ensure that a BDS is bound
to a particular IOThread. Normally the virtio-blk device calls
blk_set_aio_context() when dataplane is enabled during guest driver
initialization. This never happens in iotests since -machine
accel=qtest means there is no guest activity (including device driver
initialization).
This patch adds a QMP command to explicitly assign IOThreads in test
cases. See qapi/block-core.json for a description of the command.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20171206144550.22295-9-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index dd763dcf87..741d6c4367 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3949,3 +3949,39 @@ 'data' : { 'parent': 'str', '*child': 'str', '*node': 'str' } } + +## +# @x-blockdev-set-iothread: +# +# Move @node and its children into the @iothread. If @iothread is null then +# move @node and its children into the main loop. +# +# The node must not be attached to a BlockBackend. +# +# @node-name: the name of the block driver node +# +# @iothread: the name of the IOThread object or null for the main loop +# +# Note: this command is experimental and intended for test cases that need +# control over IOThreads only. +# +# Since: 2.12 +# +# Example: +# +# 1. Move a node into an IOThread +# -> { "execute": "x-blockdev-set-iothread", +# "arguments": { "node-name": "disk1", +# "iothread": "iothread0" } } +# <- { "return": {} } +# +# 2. Move a node into the main loop +# -> { "execute": "x-blockdev-set-iothread", +# "arguments": { "node-name": "disk1", +# "iothread": null } } +# <- { "return": {} } +# +## +{ 'command': 'x-blockdev-set-iothread', + 'data' : { 'node-name': 'str', + 'iothread': 'StrOrNull' } } |