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 95