linux/fs/ocfs2/ocfs1_fs_compat.h
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   1/* -*- mode: c; c-basic-offset: 8; -*-
   2 * vim: noexpandtab sw=8 ts=8 sts=0:
   3 *
   4 * ocfs1_fs_compat.h
   5 *
   6 * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
   7 * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
   8 * This allows an OCFS1 volume to see the partition and cleanly fail to
   9 * mount it.
  10 *
  11 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  12 *
  13 * This program is free software; you can redistribute it and/or
  14 * modify it under the terms of the GNU General Public
  15 * License, version 2,  as published by the Free Software Foundation.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 * General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public
  23 * License along with this program; if not, write to the
  24 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 * Boston, MA 021110-1307, USA.
  26 */
  27
  28#ifndef _OCFS1_FS_COMPAT_H
  29#define _OCFS1_FS_COMPAT_H
  30
  31#define OCFS1_MAX_VOL_SIGNATURE_LEN          128
  32#define OCFS1_MAX_MOUNT_POINT_LEN            128
  33#define OCFS1_MAX_VOL_ID_LENGTH               16
  34#define OCFS1_MAX_VOL_LABEL_LEN               64
  35#define OCFS1_MAX_CLUSTER_NAME_LEN            64
  36
  37#define OCFS1_MAJOR_VERSION              (2)
  38#define OCFS1_MINOR_VERSION              (0)
  39#define OCFS1_VOLUME_SIGNATURE           "OracleCFS"
  40
  41/*
  42 * OCFS1 superblock.  Lives at sector 0.
  43 */
  44struct ocfs1_vol_disk_hdr
  45{
  46/*00*/  __u32 minor_version;
  47        __u32 major_version;
  48/*08*/  __u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
  49/*88*/  __u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
  50/*108*/ __u64 serial_num;
  51/*110*/ __u64 device_size;
  52        __u64 start_off;
  53/*120*/ __u64 bitmap_off;
  54        __u64 publ_off;
  55/*130*/ __u64 vote_off;
  56        __u64 root_bitmap_off;
  57/*140*/ __u64 data_start_off;
  58        __u64 root_bitmap_size;
  59/*150*/ __u64 root_off;
  60        __u64 root_size;
  61/*160*/ __u64 cluster_size;
  62        __u64 num_nodes;
  63/*170*/ __u64 num_clusters;
  64        __u64 dir_node_size;
  65/*180*/ __u64 file_node_size;
  66        __u64 internal_off;
  67/*190*/ __u64 node_cfg_off;
  68        __u64 node_cfg_size;
  69/*1A0*/ __u64 new_cfg_off;
  70        __u32 prot_bits;
  71        __s32 excl_mount;
  72/*1B0*/
  73};
  74
  75
  76struct ocfs1_disk_lock
  77{
  78/*00*/  __u32 curr_master;
  79        __u8 file_lock;
  80        __u8 compat_pad[3];  /* Not in original definition.  Used to
  81                                make the already existing alignment
  82                                explicit */
  83        __u64 last_write_time;
  84/*10*/  __u64 last_read_time;
  85        __u32 writer_node_num;
  86        __u32 reader_node_num;
  87/*20*/  __u64 oin_node_map;
  88        __u64 dlock_seq_num;
  89/*30*/
  90};
  91
  92/*
  93 * OCFS1 volume label.  Lives at sector 1.
  94 */
  95struct ocfs1_vol_label
  96{
  97/*00*/  struct ocfs1_disk_lock disk_lock;
  98/*30*/  __u8 label[OCFS1_MAX_VOL_LABEL_LEN];
  99/*70*/  __u16 label_len;
 100/*72*/  __u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
 101/*82*/  __u16 vol_id_len;
 102/*84*/  __u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
 103/*A4*/  __u16 cluster_name_len;
 104/*A6*/
 105};
 106
 107
 108#endif /* _OCFS1_FS_COMPAT_H */
 109
 110
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