ocfs1_fs_compat.h

Go to the documentation of this file.

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * ocfs1_fs_compat.h
 *
 * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
 * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
 * This allows an OCFS1 volume to see the partition and cleanly fail to
 * mount it.
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License, version 2,  as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef _OCFS1_FS_COMPAT_H
#define _OCFS1_FS_COMPAT_H

#define OCFS1_MAX_VOL_SIGNATURE_LEN          128
#define OCFS1_MAX_MOUNT_POINT_LEN            128
#define OCFS1_MAX_VOL_ID_LENGTH               16
#define OCFS1_MAX_VOL_LABEL_LEN               64
#define OCFS1_MAX_CLUSTER_NAME_LEN            64

#define OCFS1_MAJOR_VERSION              (2)
#define OCFS1_MINOR_VERSION              (0)
#define OCFS1_VOLUME_SIGNATURE       "OracleCFS"

/*
 * OCFS1 superblock.  Lives at sector 0.
 */
struct ocfs1_vol_disk_hdr
{
/*00*/  __u32 minor_version;
    __u32 major_version;
/*08*/  __u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
/*88*/  __u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
/*108*/ __u64 serial_num;
/*110*/ __u64 device_size;
    __u64 start_off;
/*120*/ __u64 bitmap_off;
    __u64 publ_off;
/*130*/ __u64 vote_off;
    __u64 root_bitmap_off;
/*140*/ __u64 data_start_off;
    __u64 root_bitmap_size;
/*150*/ __u64 root_off;
    __u64 root_size;
/*160*/ __u64 cluster_size;
    __u64 num_nodes;
/*170*/ __u64 num_clusters;
    __u64 dir_node_size;
/*180*/ __u64 file_node_size;
    __u64 internal_off;
/*190*/ __u64 node_cfg_off;
    __u64 node_cfg_size;
/*1A0*/ __u64 new_cfg_off;
    __u32 prot_bits;
    __s32 excl_mount;
/*1B0*/
};


struct ocfs1_disk_lock
{
/*00*/  __u32 curr_master;
    __u8 file_lock;
    __u8 compat_pad[3];  /* Not in original definition.  Used to
                make the already existing alignment
                explicit */
    __u64 last_write_time;
/*10*/  __u64 last_read_time;
    __u32 writer_node_num;
    __u32 reader_node_num;
/*20*/  __u64 oin_node_map;
    __u64 dlock_seq_num;
/*30*/
};

/*
 * OCFS1 volume label.  Lives at sector 1.
 */
struct ocfs1_vol_label
{
/*00*/  struct ocfs1_disk_lock disk_lock;
/*30*/  __u8 label[OCFS1_MAX_VOL_LABEL_LEN];
/*70*/  __u16 label_len;
/*72*/  __u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
/*82*/  __u16 vol_id_len;
/*84*/  __u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
/*A4*/  __u16 cluster_name_len;
/*A6*/
};


#endif /* _OCFS1_FS_COMPAT_H */