From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org, armbru@redhat.com, eblake@redhat.com,
crosa@redhat.com, ehabkost@redhat.com, berrange@redhat.com,
pbonzini@redhat.com, vsementsov@virtuozzo.com, jsnow@redhat.com,
mreitz@redhat.com, kwolf@redhat.com
Subject: [PATCH v6 22/33] qapi: publish copy-before-write filter
Date: Wed, 21 Jul 2021 13:05:44 +0300 [thread overview]
Message-ID: <20210721100555.45594-23-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <20210721100555.45594-1-vsementsov@virtuozzo.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@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..59d3e5e42d 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 6.1
#
# 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 firstly reads corresponding blocks
+# from its file child and copies them to @target child. After successful
+# copying the write request is propagated to file child. If copying
+# failed, the original write request is failed too and no data is written
+# to file child.
+#
+# @target: The target for copy-before-write operations.
+#
+# Since: 6.1
+##
+{ '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
next prev parent reply other threads:[~2021-07-21 10:35 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 10:05 [PATCH v6 00/33] block: publish backup-top filter Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 01/33] block: introduce bdrv_replace_child_bs() Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 02/33] block: introduce blk_replace_bs Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 03/33] qdev-properties: PropertyInfo: add realized_set_allowed field Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 04/33] qdev: allow setting drive property for realized device Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 05/33] block: rename backup-top to copy-before-write Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 06/33] block-copy: always set BDRV_REQ_SERIALISING flag Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 07/33] block/block-copy: introduce block_copy_set_copy_opts() Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 08/33] block/backup: set copy_range and compress after filter insertion Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 09/33] block/backup: move cluster size calculation to block-copy Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 10/33] block/copy-before-write: relax permission requirements when no parents Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 11/33] block/copy-before-write: drop extra bdrv_unref on failure path Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 12/33] block/copy-before-write: use file child instead of backing Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 13/33] block/copy-before-write: bdrv_cbw_append(): replace child at last Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 14/33] block/copy-before-write: introduce cbw_init() Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 15/33] block/copy-before-write: cbw_init(): rename variables Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 16/33] block/copy-before-write: cbw_init(): use file child after attaching Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 17/33] block/copy-before-write: bdrv_cbw_append(): drop unused compress arg Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 18/33] block/copy-before-write: cbw_init(): use options Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 19/33] block/copy-before-write: initialize block-copy bitmap Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 20/33] block/block-copy: make setting progress optional Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 21/33] block/copy-before-write: make public block driver Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` Vladimir Sementsov-Ogievskiy [this message]
2021-07-21 10:05 ` [PATCH v6 23/33] python/qemu/machine.py: refactor _qemu_args() Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 24/33] python/qemu/machine: QEMUMachine: improve qmp() method Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 25/33] iotests.py: VM: add own __enter__ method Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 26/33] iotests/222: fix pylint and mypy complains Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 27/33] iotests/222: constantly use single quotes for strings Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 28/33] iotests: move 222 to tests/image-fleecing Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 29/33] iotests.py: hmp_qemu_io: support qdev Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 30/33] iotests/image-fleecing: proper source device Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 31/33] iotests/image-fleecing: rename tgt_node Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 32/33] iotests/image-fleecing: prepare for adding new test-case Vladimir Sementsov-Ogievskiy
2021-07-21 10:05 ` [PATCH v6 33/33] iotests/image-fleecing: add test-case for copy-before-write filter Vladimir Sementsov-Ogievskiy
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