/* * 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> /* For format version 2, rbd image 'foo' consists of objects *   rbd_id.foo		- id of image *   rbd_header.<id>	- image metadata *   rbd_object_map.<id> - optional image object map *   rbd_data.<id>.0000000000000000 *   rbd_data.<id>.0000000000000001 *   ...		- data * Clients do not access header data directly in rbd format 2. */ #define RBD_HEADER_PREFIX      "rbd_header."#define RBD_OBJECT_MAP_PREFIX  "rbd_object_map."#define RBD_ID_PREFIX          "rbd_id."#define RBD_V2_DATA_FORMAT     "%s.%016llx" #define RBD_LOCK_NAME          "rbd_lock"#define RBD_LOCK_TAG           "internal"#define RBD_LOCK_COOKIE_PREFIX "auto" enum rbd_notify_op {	RBD_NOTIFY_OP_ACQUIRED_LOCK      = 0,	RBD_NOTIFY_OP_RELEASED_LOCK      = 1,	RBD_NOTIFY_OP_REQUEST_LOCK       = 2,	RBD_NOTIFY_OP_HEADER_UPDATE      = 3,}; #define OBJECT_NONEXISTENT	0#define OBJECT_EXISTS		1#define OBJECT_PENDING		2#define OBJECT_EXISTS_CLEAN	3 #define RBD_FLAG_OBJECT_MAP_INVALID	(1ULL << 0)#define RBD_FLAG_FAST_DIFF_INVALID	(1ULL << 1) /* * For format version 1, rbd image 'foo' consists of objects *   foo.rbd		- image metadata *   rb.<idhi>.<idlo>.<extra>.000000000000 *   rb.<idhi>.<idlo>.<extra>.000000000001 *   ...		- data * There is no notion of a persistent image id in rbd format 1. */ #define RBD_SUFFIX		".rbd"#define RBD_V1_DATA_FORMAT	"%s.%012llx" #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_HEADER_TEXT		"<<< Rados Block Device Image >>>\n"#define RBD_HEADER_SIGNATURE	"RBD"#define RBD_HEADER_VERSION	"001.005" struct rbd_image_snap_ondisk {	__le64 id;	__le64 image_size;} __attribute__((packed)); struct rbd_image_header_ondisk {	char text[40];	char object_prefix[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[];} __attribute__((packed));  #endif