root/fs/ocfs2/ocfs1_fs_compat.h

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   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* -*- mode: c; c-basic-offset: 8; -*-
   3  * vim: noexpandtab sw=8 ts=8 sts=0:
   4  *
   5  * ocfs1_fs_compat.h
   6  *
   7  * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
   8  * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
   9  * This allows an OCFS1 volume to see the partition and cleanly fail to
  10  * mount it.
  11  *
  12  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  13  */
  14 
  15 #ifndef _OCFS1_FS_COMPAT_H
  16 #define _OCFS1_FS_COMPAT_H
  17 
  18 #define OCFS1_MAX_VOL_SIGNATURE_LEN          128
  19 #define OCFS1_MAX_MOUNT_POINT_LEN            128
  20 #define OCFS1_MAX_VOL_ID_LENGTH               16
  21 #define OCFS1_MAX_VOL_LABEL_LEN               64
  22 #define OCFS1_MAX_CLUSTER_NAME_LEN            64
  23 
  24 #define OCFS1_MAJOR_VERSION              (2)
  25 #define OCFS1_MINOR_VERSION              (0)
  26 #define OCFS1_VOLUME_SIGNATURE           "OracleCFS"
  27 
  28 /*
  29  * OCFS1 superblock.  Lives at sector 0.
  30  */
  31 struct ocfs1_vol_disk_hdr
  32 {
  33 /*00*/  __u32 minor_version;
  34         __u32 major_version;
  35 /*08*/  __u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
  36 /*88*/  __u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
  37 /*108*/ __u64 serial_num;
  38 /*110*/ __u64 device_size;
  39         __u64 start_off;
  40 /*120*/ __u64 bitmap_off;
  41         __u64 publ_off;
  42 /*130*/ __u64 vote_off;
  43         __u64 root_bitmap_off;
  44 /*140*/ __u64 data_start_off;
  45         __u64 root_bitmap_size;
  46 /*150*/ __u64 root_off;
  47         __u64 root_size;
  48 /*160*/ __u64 cluster_size;
  49         __u64 num_nodes;
  50 /*170*/ __u64 num_clusters;
  51         __u64 dir_node_size;
  52 /*180*/ __u64 file_node_size;
  53         __u64 internal_off;
  54 /*190*/ __u64 node_cfg_off;
  55         __u64 node_cfg_size;
  56 /*1A0*/ __u64 new_cfg_off;
  57         __u32 prot_bits;
  58         __s32 excl_mount;
  59 /*1B0*/
  60 };
  61 
  62 
  63 struct ocfs1_disk_lock
  64 {
  65 /*00*/  __u32 curr_master;
  66         __u8 file_lock;
  67         __u8 compat_pad[3];  /* Not in original definition.  Used to
  68                                 make the already existing alignment
  69                                 explicit */
  70         __u64 last_write_time;
  71 /*10*/  __u64 last_read_time;
  72         __u32 writer_node_num;
  73         __u32 reader_node_num;
  74 /*20*/  __u64 oin_node_map;
  75         __u64 dlock_seq_num;
  76 /*30*/
  77 };
  78 
  79 /*
  80  * OCFS1 volume label.  Lives at sector 1.
  81  */
  82 struct ocfs1_vol_label
  83 {
  84 /*00*/  struct ocfs1_disk_lock disk_lock;
  85 /*30*/  __u8 label[OCFS1_MAX_VOL_LABEL_LEN];
  86 /*70*/  __u16 label_len;
  87 /*72*/  __u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
  88 /*82*/  __u16 vol_id_len;
  89 /*84*/  __u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
  90 /*A4*/  __u16 cluster_name_len;
  91 /*A6*/
  92 };
  93 
  94 
  95 #endif /* _OCFS1_FS_COMPAT_H */
  96