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 */ 109 110