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| author | Daniel P. Berrangé <berrange@redhat.com> | 2022-01-05 12:38:47 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2022-01-14 12:03:16 +0100 |
| commit | 64b4529a432507ee84a924be69a03432639e87ba (patch) | |
| tree | a90711d418068a65a06f81cb356817c64cecd5a9 /qapi/qdev.json | |
| parent | eac32e2232f949c0a1638acbef8f6ba0e4feeb67 (diff) | |
| download | qemu-64b4529a432507ee84a924be69a03432639e87ba.zip qemu-64b4529a432507ee84a924be69a03432639e87ba.tar.gz qemu-64b4529a432507ee84a924be69a03432639e87ba.tar.bz2 | |
softmmu: fix device deletion events with -device JSON syntax
The -device JSON syntax impl leaks a reference on the created
DeviceState instance. As a result when you hot-unplug the
device, the device_finalize method won't be called and thus
it will fail to emit the required DEVICE_DELETED event.
A 'json-cli' feature was previously added against the
'device_add' QMP command QAPI schema to indicated to mgmt
apps that -device supported JSON syntax. Given the hotplug
bug that feature flag is not usable for its purpose, so
we add a new 'json-cli-hotplug' feature to indicate the
-device supports JSON without breaking hotplug.
Fixes: 5dacda5167560b3af8eadbce5814f60ba44b467e
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/802
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220105123847.4047954-2-berrange@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Tested-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi/qdev.json')
| -rw-r--r-- | qapi/qdev.json | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/qapi/qdev.json b/qapi/qdev.json index 69656b1..26cd101 100644 --- a/qapi/qdev.json +++ b/qapi/qdev.json @@ -44,6 +44,9 @@ # @json-cli: If present, the "-device" command line option supports JSON # syntax with a structure identical to the arguments of this # command. +# @json-cli-hotplug: If present, the "-device" command line option supports JSON +# syntax without the reference counting leak that broke +# hot-unplug # # Notes: # @@ -74,7 +77,7 @@ { 'command': 'device_add', 'data': {'driver': 'str', '*bus': 'str', '*id': 'str'}, 'gen': false, # so we can get the additional arguments - 'features': ['json-cli'] } + 'features': ['json-cli', 'json-cli-hotplug'] } ## # @device_del: |