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 97