| 1 | /*
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| 2 | * Copyright (c) 2011 Maurizio Lombardi
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup fs
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #ifndef _MFS_SUPER_H_
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| 34 | #define _MFS_SUPER_H_
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| 35 |
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| 36 | #include "mfs_const.h"
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| 37 |
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| 38 |
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| 39 | struct mfs_superblock {
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| 40 | /*Total number of inodes on the device*/
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| 41 | uint32_t s_ninodes;
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| 42 | /*Device size expressed as number of zones (unused)*/
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| 43 | uint16_t s_nzones;
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| 44 | /*Number of inode bitmap blocks*/
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| 45 | int16_t s_ibmap_blocks;
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| 46 | /*Number of zone bitmap blocks*/
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| 47 | int16_t s_zbmap_blocks;
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| 48 | /*First data zone on device*/
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| 49 | uint16_t s_first_data_zone;
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| 50 | /*Base 2 logarithm of the zone to block ratio*/
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| 51 | int16_t s_log2_zone_size;
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| 52 | int16_t s_pad;
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| 53 | /*Maximum file size expressed in bytes*/
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| 54 | int32_t s_max_file_size;
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| 55 | /*Total number of zones on the device*/
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| 56 | uint32_t s_total_zones;
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| 57 | /*Magic number used to recognize MinixFS and to detect on-disk endianness*/
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| 58 | int16_t s_magic;
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| 59 |
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| 60 | /* The following fields are valid only for MinixFS V3 */
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| 61 |
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| 62 | int16_t s_pad2;
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| 63 | /*Filesystem block size expressed in bytes*/
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| 64 | uint16_t s_block_size;
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| 65 | /*Filesystem disk format version*/
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| 66 | int8_t s_disk_version;
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| 67 | } __attribute__ ((packed));
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| 68 |
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| 69 | #endif
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| 70 |
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| 71 | /**
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| 72 | * @}
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| 73 | */
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