2fd82b9e92
RBD_MAX_SEG_NAME_LEN represents the maximum length of an rbd object name (i.e., one of the objects providing storage backing an rbd image). Another symbol, MAX_OBJ_NAME_SIZE, is used in the osd client code to define the maximum length of any object name in an osd request. Right now they disagree, with RBD_MAX_SEG_NAME_LEN being too big. There's no real benefit at this point to defining the rbd object name length limit separate from any other object name, so just get rid of RBD_MAX_SEG_NAME_LEN and use MAX_OBJ_NAME_SIZE in its place. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/*
|
|
* 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_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_DATA_PREFIX "rbd_data."
|
|
#define RBD_ID_PREFIX "rbd_id."
|
|
|
|
/*
|
|
* For format version 1, rbd image 'foo' consists of objects
|
|
* foo.rbd - image metadata
|
|
* rb.<idhi>.<idlo>.00000000
|
|
* rb.<idhi>.<idlo>.00000001
|
|
* ... - data
|
|
* There is no notion of a persistent image id in rbd format 1.
|
|
*/
|
|
|
|
#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_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_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[0];
|
|
} __attribute__((packed));
|
|
|
|
|
|
#endif
|