tools/libxl: Migration v2 stream format

C structures describing the Libxl migration v2 stream format

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>

---
v2: Move into libxl__ namespace

tools/libxl/libxl_sr_stream_format.h

@@ -0,0 +1,57 @@
+#ifndef LIBXL__SR_STREAM_FORMAT_H
+#define LIBXL__SR_STREAM_FORMAT_H
+
+/*
+ * C structures for the Migration v2 stream format.
+ * See docs/specs/libxl-migration-stream.pandoc
+ */
+
+#include <stdint.h>
+
+typedef struct libxl__sr_hdr
+{
+    uint64_t ident;
+    uint32_t version;
+    uint32_t options;
+} libxl__sr_hdr;
+
+#define RESTORE_STREAM_IDENT         0x4c6962786c466d74UL
+#define RESTORE_STREAM_VERSION       0x00000002U
+
+#define RESTORE_OPT_BIG_ENDIAN       (1u << 0)
+#define RESTORE_OPT_LEGACY           (1u << 1)
+
+
+typedef struct libxl__sr_rec_hdr
+{
+    uint32_t type;
+    uint32_t length;
+} libxl__sr_rec_hdr;
+
+/* All records must be aligned up to an 8 octet boundary */
+#define REC_ALIGN_ORDER              3U
+
+#define REC_TYPE_END                 0x00000000U
+#define REC_TYPE_LIBXC_CONTEXT       0x00000001U
+#define REC_TYPE_XENSTORE_DATA       0x00000002U
+#define REC_TYPE_EMULATOR_CONTEXT    0x00000003U
+
+typedef struct libxl__sr_emulator_hdr
+{
+    uint32_t id;
+    uint32_t index;
+} libxl__sr_emulator_hdr;
+
+#define EMULATOR_UNKNOWN             0x00000000U
+#define EMULATOR_QEMU_TRADITIONAL    0x00000001U
+#define EMULATOR_QEMU_UPSTREAM       0x00000002U
+
+#endif /* LIBXL__SR_STREAM_FORMAT_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */