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[PULL v2 09/25] qapi: Convert simple union ImageInfoSpecific to flat one
From: |
Markus Armbruster |
Subject: |
[PULL v2 09/25] qapi: Convert simple union ImageInfoSpecific to flat one |
Date: |
Mon, 27 Sep 2021 15:06:31 +0200 |
Simple unions predate flat unions. Having both complicates the QAPI
schema language and the QAPI generator. We haven't been using simple
unions in new code for a long time, because they are less flexible and
somewhat awkward on the wire.
To prepare for their removal, convert simple union ImageInfoSpecific
to an equivalent flat one. Adds some boilerplate to the schema, which
is a bit ugly, but a lot easier to maintain than the simple union
feature.
Implicit enum ImageInfoSpecificKind becomes explicit. It duplicates
part of enum BlockdevDriver. We could reuse BlockdevDriver instead.
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20210917143134.412106-10-armbru@redhat.com>
---
qapi/block-core.json | 59 ++++++++++++++++++++++++++++++++++++++------
1 file changed, 52 insertions(+), 7 deletions(-)
diff --git a/qapi/block-core.json b/qapi/block-core.json
index c8ce1d9d5d..623a4f4a3f 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -139,6 +139,52 @@
'*encryption-format': 'RbdImageEncryptionFormat'
} }
+##
+# @ImageInfoSpecificKind:
+#
+# @luks: Since 2.7
+# @rbd: Since 6.1
+#
+# Since: 1.7
+##
+{ 'enum': 'ImageInfoSpecificKind',
+ 'data': [ 'qcow2', 'vmdk', 'luks', 'rbd' ] }
+
+##
+# @ImageInfoSpecificQCow2Wrapper:
+#
+# Since: 1.7
+##
+{ 'struct': 'ImageInfoSpecificQCow2Wrapper',
+ 'data': { 'data': 'ImageInfoSpecificQCow2' } }
+
+##
+# @ImageInfoSpecificVmdkWrapper:
+#
+# Since: 6.1
+##
+{ 'struct': 'ImageInfoSpecificVmdkWrapper',
+ 'data': { 'data': 'ImageInfoSpecificVmdk' } }
+
+##
+# @ImageInfoSpecificLUKSWrapper:
+#
+# Since: 2.7
+##
+{ 'struct': 'ImageInfoSpecificLUKSWrapper',
+ 'data': { 'data': 'QCryptoBlockInfoLUKS' } }
+# If we need to add block driver specific parameters for
+# LUKS in future, then we'll subclass QCryptoBlockInfoLUKS
+# to define a ImageInfoSpecificLUKS
+
+##
+# @ImageInfoSpecificRbdWrapper:
+#
+# Since: 6.1
+##
+{ 'struct': 'ImageInfoSpecificRbdWrapper',
+ 'data': { 'data': 'ImageInfoSpecificRbd' } }
+
##
# @ImageInfoSpecific:
#
@@ -147,14 +193,13 @@
# Since: 1.7
##
{ 'union': 'ImageInfoSpecific',
+ 'base': { 'type': 'ImageInfoSpecificKind' },
+ 'discriminator': 'type',
'data': {
- 'qcow2': 'ImageInfoSpecificQCow2',
- 'vmdk': 'ImageInfoSpecificVmdk',
- # If we need to add block driver specific parameters for
- # LUKS in future, then we'll subclass QCryptoBlockInfoLUKS
- # to define a ImageInfoSpecificLUKS
- 'luks': 'QCryptoBlockInfoLUKS',
- 'rbd': 'ImageInfoSpecificRbd'
+ 'qcow2': 'ImageInfoSpecificQCow2Wrapper',
+ 'vmdk': 'ImageInfoSpecificVmdkWrapper',
+ 'luks': 'ImageInfoSpecificLUKSWrapper',
+ 'rbd': 'ImageInfoSpecificRbdWrapper'
} }
##
--
2.31.1
- [PULL v2 00/25] QAPI patches patches for 2021-09-25, Markus Armbruster, 2021/09/27
- [PULL v2 04/25] qapi: Convert simple union InputEvent to flat one, Markus Armbruster, 2021/09/27
- [PULL v2 09/25] qapi: Convert simple union ImageInfoSpecific to flat one,
Markus Armbruster <=
- [PULL v2 11/25] tests/qapi-schema: Prepare for simple union UserDefListUnion removal, Markus Armbruster, 2021/09/27
- [PULL v2 16/25] tests/qapi-schema: Simple union UserDefListUnion is now unused, drop, Markus Armbruster, 2021/09/27
- [PULL v2 19/25] tests/qapi-schema: Drop simple union __org.qemu_x-Union1, Markus Armbruster, 2021/09/27
- [PULL v2 05/25] qapi: Convert simple union TpmTypeOptions to flat one, Markus Armbruster, 2021/09/27
- [PULL v2 14/25] test-clone-visitor: Wean off UserDefListUnion, Markus Armbruster, 2021/09/27
- [PULL v2 17/25] tests/qapi-schema: Rewrite simple union TestIfUnion to be flat, Markus Armbruster, 2021/09/27
- [PULL v2 08/25] qapi: Convert simple union SocketAddressLegacy to flat one, Markus Armbruster, 2021/09/27
- [PULL v2 07/25] qapi: Convert simple union ChardevBackend to flat one, Markus Armbruster, 2021/09/27
- [PULL v2 03/25] qapi: Convert simple union KeyValue to flat one, Markus Armbruster, 2021/09/27
- [PULL v2 02/25] qapi: Stop enforcing "type name should not end in 'Kind', Markus Armbruster, 2021/09/27