[linux.git] / drivers / block / rbd_types.h

/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2004-2010 Sage Weil <[email protected]>
 *
 * 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
Commit	Line	Data
602adf40 YS	1	/*
	2	* Ceph - scalable distributed file system
	3	*
	4	* Copyright (C) 2004-2010 Sage Weil <[email protected]>
	5	*
	6	* This is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License version 2.1, as published by the Free Software
	9	* Foundation. See file COPYING.
	10	*
	11	*/
	12
	13	#ifndef CEPH_RBD_TYPES_H
	14	#define CEPH_RBD_TYPES_H
	15
	16	#include <linux/types.h>
	17
	18	/*
	19	* rbd image 'foo' consists of objects
	20	* foo.rbd - image metadata
	21	* foo.00000000
	22	* foo.00000001
	23	* ... - data
	24	*/
	25
	26	#define RBD_SUFFIX ".rbd"
	27	#define RBD_DIRECTORY "rbd_directory"
	28	#define RBD_INFO "rbd_info"
	29
	30	#define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */
	31	#define RBD_MIN_OBJ_ORDER 16
	32	#define RBD_MAX_OBJ_ORDER 30
	33
	34	#define RBD_MAX_OBJ_NAME_LEN 96
	35	#define RBD_MAX_SEG_NAME_LEN 128
	36
	37	#define RBD_COMP_NONE 0
	38	#define RBD_CRYPT_NONE 0
	39
	40	#define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n"
	41	#define RBD_HEADER_SIGNATURE "RBD"
	42	#define RBD_HEADER_VERSION "001.005"
	43
	44	struct rbd_info {
	45	__le64 max_id;
	46	} __attribute__ ((packed));
	47
	48	struct rbd_image_snap_ondisk {
	49	__le64 id;
	50	__le64 image_size;
	51	} __attribute__((packed));
	52
	53	struct rbd_image_header_ondisk {
	54	char text[40];
	55	char block_name[24];
	56	char signature[4];
	57	char version[8];
	58	struct {
	59	__u8 order;
	60	__u8 crypt_type;
	61	__u8 comp_type;
	62	__u8 unused;
	63	} __attribute__((packed)) options;
	64	__le64 image_size;
65	__le64 snap_seq;
66	__le32 snap_count;
67	__le32 reserved;
68	__le64 snap_names_len;
69	struct rbd_image_snap_ondisk snaps[0];
70	} __attribute__((packed));
71
72
73	#endif