LXR linux/fs/ocfs2/ocfs1_fs

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * ocfs1_fs_compat.h
   4 *
   5 * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
   6 * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
   7 * This allows an OCFS1 volume to see the partition and cleanly fail to
   8 * mount it.
   9 *
  10 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  11 */
  12
  13#ifndef _OCFS1_FS_COMPAT_H
  14#define _OCFS1_FS_COMPAT_H
  15
  16#define OCFS1_MAX_VOL_SIGNATURE_LEN          128
  17#define OCFS1_MAX_MOUNT_POINT_LEN            128
  18#define OCFS1_MAX_VOL_ID_LENGTH               16
  19#define OCFS1_MAX_VOL_LABEL_LEN               64
  20#define OCFS1_MAX_CLUSTER_NAME_LEN            64
  21
  22#define OCFS1_MAJOR_VERSION              (2)
  23#define OCFS1_MINOR_VERSION              (0)
  24#define OCFS1_VOLUME_SIGNATURE           "OracleCFS"
  25
  26/*
  27 * OCFS1 superblock.  Lives at sector 0.
  28 */
  29struct ocfs1_vol_disk_hdr
  30{
  31/*00*/  __u32 minor_version;
  32        __u32 major_version;
  33/*08*/  __u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
  34/*88*/  __u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
  35/*108*/ __u64 serial_num;
  36/*110*/ __u64 device_size;
  37        __u64 start_off;
  38/*120*/ __u64 bitmap_off;
  39        __u64 publ_off;
  40/*130*/ __u64 vote_off;
  41        __u64 root_bitmap_off;
  42/*140*/ __u64 data_start_off;
  43        __u64 root_bitmap_size;
  44/*150*/ __u64 root_off;
  45        __u64 root_size;
  46/*160*/ __u64 cluster_size;
  47        __u64 num_nodes;
  48/*170*/ __u64 num_clusters;
  49        __u64 dir_node_size;
  50/*180*/ __u64 file_node_size;
  51        __u64 internal_off;
  52/*190*/ __u64 node_cfg_off;
  53        __u64 node_cfg_size;
  54/*1A0*/ __u64 new_cfg_off;
  55        __u32 prot_bits;
  56        __s32 excl_mount;
  57/*1B0*/
  58};
  59
  60
  61struct ocfs1_disk_lock
  62{
  63/*00*/  __u32 curr_master;
  64        __u8 file_lock;
  65        __u8 compat_pad[3];  /* Not in original definition.  Used to
  66                                make the already existing alignment
  67                                explicit */
  68        __u64 last_write_time;
  69/*10*/  __u64 last_read_time;
  70        __u32 writer_node_num;
  71        __u32 reader_node_num;
  72/*20*/  __u64 oin_node_map;
  73        __u64 dlock_seq_num;
  74/*30*/
  75};
  76
  77/*
  78 * OCFS1 volume label.  Lives at sector 1.
  79 */
  80struct ocfs1_vol_label
  81{
  82/*00*/  struct ocfs1_disk_lock disk_lock;
  83/*30*/  __u8 label[OCFS1_MAX_VOL_LABEL_LEN];
  84/*70*/  __u16 label_len;
  85/*72*/  __u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
  86/*82*/  __u16 vol_id_len;
  87/*84*/  __u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
  88/*A4*/  __u16 cluster_name_len;
  89/*A6*/
  90};
  91
  92
  93#endif /* _OCFS1_FS_COMPAT_H */
  94
  95