[Xen-devel] [RFC PATCH 1/7] add definitions for vm snapshot

[Chunyan Liu <cyliu@xxxxxxxx>]

Define libxl_disk_snapshot_type and libxl_disk_snapshot for VM
snapshot usage.

Signed-off-by: Chunyan Liu <cyliu@xxxxxxxx>
---
 tools/libxl/libxl_types.idl          | 31 +++++++++++++++++++++++++++++++
 tools/libxl/libxl_types_internal.idl |  8 ++++++++
 2 files changed, 39 insertions(+)

diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index ef346e7..f7a4c3e 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -793,3 +793,34 @@ libxl_psr_cat_info = Struct("psr_cat_info", [
     ("cos_max", uint32),
     ("cbm_len", uint32),
     ])
+
+libxl_disk_snapshot_type = Enumeration("disk_snapshot_type", [
+    (0, "INVALID"),
+    (1, "INTERNAL"),
+    (2, "EXTERNAL"),
+    ])
+
+libxl_disk_snapshot = Struct("disk_snapshot",[
+    # target disk
+    ("disk", libxl_device_disk),
+
+    # disk snapshot name
+    ("name", string),
+
+    ("u", KeyedUnion(None, libxl_disk_snapshot_type, "type",
+         [("external", Struct(None, [
+
+            # disk format for external files. Since external disk snapshot is
+            # implemented with backing file mechanism, the external file disk
+            # format must support backing file. This field can be NULL, then
+            # a proper disk format will be used by default according to the
+            # orignal disk format.
+            ("external_format", libxl_disk_format),
+
+            # external file path. This field should be non-NULL and a new path.
+            ("external_path",   string),
+            ])),
+          ("internal", None),
+          ("invalid", None),
+         ])),
+    ])
diff --git a/tools/libxl/libxl_types_internal.idl 
b/tools/libxl/libxl_types_internal.idl
index 5e55685..60dce1d 100644
--- a/tools/libxl/libxl_types_internal.idl
+++ b/tools/libxl/libxl_types_internal.idl
@@ -45,3 +45,11 @@ libxl__device_action = Enumeration("device_action", [
     (1, "ADD"),
     (2, "REMOVE"),
     ])
+
+libxl_disk_snapshot_op = Enumeration("disk_snapshot_op", [
+    (1, "CREATE"),
+    (2, "DELETE"),
+    (3, "REVERT"),
+    (4, "LIST"),
+    ])
+
-- 
2.1.4


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