[PATCH 4/5] qemu: capabilities: Introduce QEMU_CAPS_BLOCKDEV_SNAPSHOT_ALLOW_WRITE_ONLY
The capability is based on qemu's support of using blockdev-snapshot to
install backing chain also for images which are in use by a block-copy
job.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_capabilities.c | 2 ++
src/qemu/qemu_capabilities.h | 1 +
tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml | 1 +
3 files changed, 4 insertions(+)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index a75ca0574d..25a77c24af 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -565,6 +565,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
/* 355 */
"vhost-user-fs",
"query-named-block-nodes.flat",
+ "blockdev-snapshot.allow-write-only-overlay",
);
@@ -1442,6 +1443,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsQMPSchemaQueries[] =
{
{ "human-monitor-command/$savevm-monitor-nodes",
QEMU_CAPS_SAVEVM_MONITOR_NODES },
{ "blockdev-add/arg-type/+nvme", QEMU_CAPS_DRIVE_NVME },
{ "query-named-block-nodes/arg-type/flat",
QEMU_CAPS_QMP_QUERY_NAMED_BLOCK_NODES_FLAT },
+ { "blockdev-snapshot/$allow-write-only-overlay",
QEMU_CAPS_BLOCKDEV_SNAPSHOT_ALLOW_WRITE_ONLY },
};
typedef struct _virQEMUCapsObjectTypeProps virQEMUCapsObjectTypeProps;
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 8b6145c327..e952fcb6b8 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -546,6 +546,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check
*/
/* 355 */
QEMU_CAPS_DEVICE_VHOST_USER_FS, /* -device vhost-user-fs */
QEMU_CAPS_QMP_QUERY_NAMED_BLOCK_NODES_FLAT, /* query-named-block-nodes supports the
'flat' option */
+ QEMU_CAPS_BLOCKDEV_SNAPSHOT_ALLOW_WRITE_ONLY, /* blockdev-snapshot has the
'allow-write-only-overlay' feature */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
b/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
index 5b8005dd16..3a3c9b1363 100644
--- a/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.0.0.x86_64.xml
@@ -225,6 +225,7 @@
<flag name='virtio-net.failover'/>
<flag name='vhost-user-fs'/>
<flag name='query-named-block-nodes.flat'/>
+ <flag name='blockdev-snapshot.allow-write-only-overlay'/>
<version>4002050</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>43100241</microcodeVersion>
--
2.24.1