Merge tag 'v2.6.37' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / block / rbd_types.h

diff --git a/drivers/block/rbd_types.h b/drivers/block/rbd_types.h
new file mode 100644 (file)
index 0000000..fc6c678
--- /dev/null
+++ b/drivers/block/rbd_types.h
@@ -0,0 +1,73 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2010 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_RBD_TYPES_H
+#define CEPH_RBD_TYPES_H
+
+#include <linux/types.h>
+
+/*
+ * rbd image 'foo' consists of objects
+ *   foo.rbd      - image metadata
+ *   foo.00000000
+ *   foo.00000001
+ *   ...          - data
+ */
+
+#define RBD_SUFFIX             ".rbd"
+#define RBD_DIRECTORY           "rbd_directory"
+#define RBD_INFO                "rbd_info"
+
+#define RBD_DEFAULT_OBJ_ORDER  22   /* 4MB */
+#define RBD_MIN_OBJ_ORDER       16
+#define RBD_MAX_OBJ_ORDER       30
+
+#define RBD_MAX_OBJ_NAME_LEN   96
+#define RBD_MAX_SEG_NAME_LEN   128
+
+#define RBD_COMP_NONE          0
+#define RBD_CRYPT_NONE         0
+
+#define RBD_HEADER_TEXT                "<<< Rados Block Device Image >>>\n"
+#define RBD_HEADER_SIGNATURE   "RBD"
+#define RBD_HEADER_VERSION     "001.005"
+
+struct rbd_info {
+       __le64 max_id;
+} __attribute__ ((packed));
+
+struct rbd_image_snap_ondisk {
+       __le64 id;
+       __le64 image_size;
+} __attribute__((packed));
+
+struct rbd_image_header_ondisk {
+       char text[40];
+       char block_name[24];
+       char signature[4];
+       char version[8];
+       struct {
+               __u8 order;
+               __u8 crypt_type;
+               __u8 comp_type;
+               __u8 unused;
+       } __attribute__((packed)) options;
+       __le64 image_size;
+       __le64 snap_seq;
+       __le32 snap_count;
+       __le32 reserved;
+       __le64 snap_names_len;
+       struct rbd_image_snap_ondisk snaps[0];
+} __attribute__((packed));
+
+
+#endif