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-rw-r--r--qapi/block-core.json20
1 files changed, 19 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 04c5196e59..3484986d1c 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2829,7 +2829,7 @@
'cloop', 'compress', 'copy-on-read', 'dmg', 'file', 'ftp', 'ftps',
'gluster', 'host_cdrom', 'host_device', 'http', 'https', 'iscsi',
'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme', 'parallels',
- 'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
+ 'preallocate', 'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd',
{ 'name': 'replication', 'if': 'defined(CONFIG_REPLICATION)' },
'sheepdog',
'ssh', 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat' ] }
@@ -3099,6 +3099,23 @@
'luks': 'QCryptoBlockOptionsLUKS'} }
##
+# @BlockdevOptionsPreallocate:
+#
+# Filter driver intended to be inserted between format and protocol node
+# and do preallocation in protocol node on write.
+#
+# @prealloc-align: on preallocation, align file length to this number,
+# default 1048576 (1M)
+#
+# @prealloc-size: how much to preallocate, default 134217728 (128M)
+#
+# Since: 6.0
+##
+{ 'struct': 'BlockdevOptionsPreallocate',
+ 'base': 'BlockdevOptionsGenericFormat',
+ 'data': { '*prealloc-align': 'int', '*prealloc-size': 'int' } }
+
+##
# @BlockdevOptionsQcow2:
#
# Driver specific block device options for qcow2.
@@ -4006,6 +4023,7 @@
'null-co': 'BlockdevOptionsNull',
'nvme': 'BlockdevOptionsNVMe',
'parallels': 'BlockdevOptionsGenericFormat',
+ 'preallocate':'BlockdevOptionsPreallocate',
'qcow2': 'BlockdevOptionsQcow2',
'qcow': 'BlockdevOptionsQcow',
'qed': 'BlockdevOptionsGenericCOWFormat',