fs/ocfs2/ocfs1_fs_compat.h

   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  */
  44 struct 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
  76 struct 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  */
  95 struct 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