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Diffstat (limited to 'fs/freevxfs/vxfs_olt.h')
| -rw-r--r-- | fs/freevxfs/vxfs_olt.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/fs/freevxfs/vxfs_olt.h b/fs/freevxfs/vxfs_olt.h new file mode 100644 index 000000000..b7b3af502 --- /dev/null +++ b/fs/freevxfs/vxfs_olt.h @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2000-2001 Christoph Hellwig. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL"). + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ +#ifndef _VXFS_OLT_H_ +#define _VXFS_OLT_H_ + +/* + * Veritas filesystem driver - Object Location Table data structures. + * + * This file contains definitions for the Object Location Table used + * by the Veritas Filesystem version 2 and newer. + */ + + +/* + * OLT magic number (vxfs_olt->olt_magic). + */ +#define VXFS_OLT_MAGIC 0xa504FCF5 + +/* + * VxFS OLT entry types. + */ +enum { + VXFS_OLT_FREE = 1, + VXFS_OLT_FSHEAD = 2, + VXFS_OLT_CUT = 3, + VXFS_OLT_ILIST = 4, + VXFS_OLT_DEV = 5, + VXFS_OLT_SB = 6 +}; + +/* + * VxFS OLT header. + * + * The Object Location Table header is placed at the beginning of each + * OLT extent. It is used to fing certain filesystem-wide metadata, e.g. + * the initial inode list, the fileset header or the device configuration. + */ +struct vxfs_olt { + u_int32_t olt_magic; /* magic number */ + u_int32_t olt_size; /* size of this entry */ + u_int32_t olt_checksum; /* checksum of extent */ + u_int32_t __unused1; /* ??? */ + u_int32_t olt_mtime; /* time of last mod. (sec) */ + u_int32_t olt_mutime; /* time of last mod. (usec) */ + u_int32_t olt_totfree; /* free space in OLT extent */ + vx_daddr_t olt_extents[2]; /* addr of this extent, replica */ + u_int32_t olt_esize; /* size of this extent */ + vx_daddr_t olt_next[2]; /* addr of next extent, replica */ + u_int32_t olt_nsize; /* size of next extent */ + u_int32_t __unused2; /* align to 8 byte boundary */ +}; + +/* + * VxFS common OLT entry (on disk). + */ +struct vxfs_oltcommon { + u_int32_t olt_type; /* type of this record */ + u_int32_t olt_size; /* size of this record */ +}; + +/* + * VxFS free OLT entry (on disk). + */ +struct vxfs_oltfree { + u_int32_t olt_type; /* type of this record */ + u_int32_t olt_fsize; /* size of this free record */ +}; + +/* + * VxFS initial-inode list (on disk). + */ +struct vxfs_oltilist { + u_int32_t olt_type; /* type of this record */ + u_int32_t olt_size; /* size of this record */ + vx_ino_t olt_iext[2]; /* initial inode list, replica */ +}; + +/* + * Current Usage Table + */ +struct vxfs_oltcut { + u_int32_t olt_type; /* type of this record */ + u_int32_t olt_size; /* size of this record */ + vx_ino_t olt_cutino; /* inode of current usage table */ + u_int32_t __pad; /* unused, 8 byte align */ +}; + +/* + * Inodes containing Superblock, Intent log and OLTs + */ +struct vxfs_oltsb { + u_int32_t olt_type; /* type of this record */ + u_int32_t olt_size; /* size of this record */ + vx_ino_t olt_sbino; /* inode of superblock file */ + u_int32_t __unused1; /* ??? */ + vx_ino_t olt_logino[2]; /* inode of log file,replica */ + vx_ino_t olt_oltino[2]; /* inode of OLT, replica */ +}; + +/* + * Inode containing device configuration + it's replica + */ +struct vxfs_oltdev { + u_int32_t olt_type; /* type of this record */ + u_int32_t olt_size; /* size of this record */ + vx_ino_t olt_devino[2]; /* inode of device config files */ +}; + +/* + * Fileset header + */ +struct vxfs_oltfshead { + u_int32_t olt_type; /* type number */ + u_int32_t olt_size; /* size of this record */ + vx_ino_t olt_fsino[2]; /* inodes of fileset header */ +}; + +#endif /* _VXFS_OLT_H_ */ |