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[PATCH v8 22/34] qapi: publish copy-before-write filter
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[PATCH v8 22/34] qapi: publish copy-before-write filter |
Date: |
Tue, 24 Aug 2021 11:38:44 +0300 |
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
---
qapi/block-core.json | 25 +++++++++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 675d8265eb..6764d8b84f 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2825,13 +2825,14 @@
# @blklogwrites: Since 3.0
# @blkreplay: Since 4.2
# @compress: Since 5.0
+# @copy-before-write: Since 6.2
#
# Since: 2.9
##
{ 'enum': 'BlockdevDriver',
'data': [ 'blkdebug', 'blklogwrites', 'blkreplay', 'blkverify', 'bochs',
- 'cloop', 'compress', 'copy-on-read', 'dmg', 'file', 'ftp', 'ftps',
- 'gluster',
+ 'cloop', 'compress', 'copy-before-write', 'copy-on-read', 'dmg',
+ 'file', 'ftp', 'ftps', 'gluster',
{'name': 'host_cdrom', 'if': 'defined(HAVE_HOST_BLOCK_DEVICE)' },
{'name': 'host_device', 'if': 'defined(HAVE_HOST_BLOCK_DEVICE)' },
'http', 'https', 'iscsi',
@@ -4049,6 +4050,25 @@
'base': 'BlockdevOptionsGenericFormat',
'data': { '*bottom': 'str' } }
+##
+# @BlockdevOptionsCbw:
+#
+# Driver specific block device options for the copy-before-write driver,
+# which does so called copy-before-write operations: when data is
+# written to the filter, the filter first reads corresponding blocks
+# from its file child and copies them to @target child. After successfully
+# copying, the write request is propagated to file child. If copying
+# fails, the original write request is failed too and no data is written
+# to file child.
+#
+# @target: The target for copy-before-write operations.
+#
+# Since: 6.2
+##
+{ 'struct': 'BlockdevOptionsCbw',
+ 'base': 'BlockdevOptionsGenericFormat',
+ 'data': { 'target': 'BlockdevRef' } }
+
##
# @BlockdevOptions:
#
@@ -4101,6 +4121,7 @@
'bochs': 'BlockdevOptionsGenericFormat',
'cloop': 'BlockdevOptionsGenericFormat',
'compress': 'BlockdevOptionsGenericFormat',
+ 'copy-before-write':'BlockdevOptionsCbw',
'copy-on-read':'BlockdevOptionsCor',
'dmg': 'BlockdevOptionsGenericFormat',
'file': 'BlockdevOptionsFile',
--
2.29.2
- [PATCH v8 14/34] block/copy-before-write: introduce cbw_init(), (continued)
- [PATCH v8 14/34] block/copy-before-write: introduce cbw_init(), Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 11/34] block/copy-before-write: drop extra bdrv_unref on failure path, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 16/34] block/copy-before-write: cbw_init(): use file child after attaching, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 10/34] block/copy-before-write: relax permission requirements when no parents, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 18/34] block/copy-before-write: cbw_init(): use options, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 12/34] block/copy-before-write: use file child instead of backing, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 09/34] block/backup: move cluster size calculation to block-copy, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 15/34] block/copy-before-write: cbw_init(): rename variables, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 25/34] python:QEMUMachine: template typing for self returning methods, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 22/34] qapi: publish copy-before-write filter,
Vladimir Sementsov-Ogievskiy <=
- [PATCH v8 26/34] iotests/222: fix pylint and mypy complains, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 13/34] block/copy-before-write: bdrv_cbw_append(): replace child at last, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 21/34] block/copy-before-write: make public block driver, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 17/34] block/copy-before-write: bdrv_cbw_append(): drop unused compress arg, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 19/34] block/copy-before-write: initialize block-copy bitmap, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 20/34] block/block-copy: make setting progress optional, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 23/34] python/qemu/machine.py: refactor _qemu_args(), Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 24/34] python/qemu/machine: QEMUMachine: improve qmp() method, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 28/34] iotests: move 222 to tests/image-fleecing, Vladimir Sementsov-Ogievskiy, 2021/08/24
- [PATCH v8 27/34] iotests/222: constantly use single quotes for strings, Vladimir Sementsov-Ogievskiy, 2021/08/24