2 * Copyright (c) 2000-2001 Christoph Hellwig.
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33 #ident "$Id: vxfs_olt.h,v 1.5 2001/04/25 18:11:23 hch Exp hch $"
36 * Veritas filesystem driver - Object Location Table data structures.
38 * This file contains definitions for the Object Location Table used
39 * by the Veritas Filesystem version 2 and newer.
44 * OLT magic number (vxfs_olt->olt_magic).
46 #define VXFS_OLT_MAGIC 0xa504FCF5
49 * VxFS OLT entry types.
63 * The Object Location Table header is placed at the beginning of each
64 * OLT extent. It is used to fing certain filesystem-wide metadata, e.g.
65 * the inital inode list, the fileset header or the device configuration.
68 u_int32_t olt_magic; /* magic number */
69 u_int32_t olt_size; /* size of this entry */
70 u_int32_t olt_checksum; /* checksum of extent */
71 u_int32_t __unused1; /* ??? */
72 u_int32_t olt_mtime; /* time of last mod. (sec) */
73 u_int32_t olt_mutime; /* time of last mod. (usec) */
74 u_int32_t olt_totfree; /* free space in OLT extent */
75 vx_daddr_t olt_extents[2]; /* addr of this extent, replica */
76 u_int32_t olt_esize; /* size of this extent */
77 vx_daddr_t olt_next[2]; /* addr of next extent, replica */
78 u_int32_t olt_nsize; /* size of next extent */
79 u_int32_t __unused2; /* align to 8 byte boundary */
83 * VxFS common OLT entry (on disk).
85 struct vxfs_oltcommon {
86 u_int32_t olt_type; /* type of this record */
87 u_int32_t olt_size; /* size of this record */
91 * VxFS free OLT entry (on disk).
94 u_int32_t olt_type; /* type of this record */
95 u_int32_t olt_fsize; /* size of this free record */
99 * VxFS initial-inode list (on disk).
101 struct vxfs_oltilist {
102 u_int32_t olt_type; /* type of this record */
103 u_int32_t olt_size; /* size of this record */
104 vx_ino_t olt_iext[2]; /* initial inode list, replica */
108 * Current Usage Table
111 u_int32_t olt_type; /* type of this record */
112 u_int32_t olt_size; /* size of this record */
113 vx_ino_t olt_cutino; /* inode of current usage table */
114 u_int32_t __pad; /* unused, 8 byte align */
118 * Inodes containing Superblock, Intent log and OLTs
121 u_int32_t olt_type; /* type of this record */
122 u_int32_t olt_size; /* size of this record */
123 vx_ino_t olt_sbino; /* inode of superblock file */
124 u_int32_t __unused1; /* ??? */
125 vx_ino_t olt_logino[2]; /* inode of log file,replica */
126 vx_ino_t olt_oltino[2]; /* inode of OLT, replica */
130 * Inode containing device configuration + it's replica
133 u_int32_t olt_type; /* type of this record */
134 u_int32_t olt_size; /* size of this record */
135 vx_ino_t olt_devino[2]; /* inode of device config files */
141 struct vxfs_oltfshead {
142 u_int32_t olt_type; /* type number */
143 u_int32_t olt_size; /* size of this record */
144 vx_ino_t olt_fsino[2]; /* inodes of fileset header */
147 #endif /* _VXFS_OLT_H_ */