fs/ocfs2/ocfs1_fs_compat.h

   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  */
  29 struct 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
  61 struct 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  */
  80 struct 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