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/*

 * 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.LIB.

 *

 */

#ifndef CEPH_RBD_TYPES_H

#define CEPH_RBD_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_MAX_OBJ_NAME_SIZE   96

#define RBD_MAX_BLOCK_NAME_SIZE 24

#define RBD_MAX_SEG_NAME_SIZE   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 {

    uint64_t max_id;

} __attribute__ ((packed));

struct rbd_obj_snap_ondisk {

    uint64_t id;

    uint64_t image_size;

} __attribute__((packed));

struct rbd_obj_header_ondisk {

    char text[40];

    char block_name[RBD_MAX_BLOCK_NAME_SIZE];

    char signature[4];

    char version[8];

    struct {

        uint8_t order;

        uint8_t crypt_type;

        uint8_t comp_type;

        uint8_t unused;

    } __attribute__((packed)) options;

    uint64_t image_size;

    uint64_t snap_seq;

    uint32_t snap_count;

    uint32_t reserved;

    uint64_t snap_names_len;

    struct rbd_obj_snap_ondisk snaps[0];

} __attribute__((packed));

#endif