| 1 | /*
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| 2 | * Copyright (c) 2012 Frantisek Princ
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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 libext4
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #ifndef LIBEXT4_LIBEXT4_SUPERBLOCK_H_
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| 34 | #define LIBEXT4_LIBEXT4_SUPERBLOCK_H_
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| 35 |
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| 36 | #include <libblock.h>
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| 37 | #include <sys/types.h>
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| 38 |
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| 39 | #include "libext4_types.h"
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| 40 |
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| 41 | extern uint32_t ext4_superblock_get_inodes_count(ext4_superblock_t *);
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| 42 | extern void ext4_superblock_set_inodes_count(ext4_superblock_t *, uint32_t);
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| 43 | extern uint64_t ext4_superblock_get_blocks_count(ext4_superblock_t *);
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| 44 | extern void ext4_superblock_set_blocks_count(ext4_superblock_t *, uint64_t);
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| 45 | extern uint64_t ext4_superblock_get_reserved_blocks_count(ext4_superblock_t *);
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| 46 | extern void ext4_superblock_set_reserved_blocks_count(ext4_superblock_t *, uint64_t);
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| 47 | extern uint64_t ext4_superblock_get_free_blocks_count(ext4_superblock_t *);
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| 48 | extern void ext4_superblock_set_free_blocks_count(ext4_superblock_t *, uint64_t);
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| 49 | extern uint32_t ext4_superblock_get_free_inodes_count(ext4_superblock_t *);
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| 50 | extern void ext4_superblock_set_free_inodes_count(ext4_superblock_t *, uint32_t);
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| 51 | extern uint32_t ext4_superblock_get_first_data_block(ext4_superblock_t *);
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| 52 | extern void ext4_superblock_set_first_data_block(ext4_superblock_t *, uint32_t);
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| 53 | extern uint32_t ext4_superblock_get_log_block_size(ext4_superblock_t *);
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| 54 | extern void ext4_superblock_set_log_block_size(ext4_superblock_t *, uint32_t);
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| 55 | extern uint32_t ext4_superblock_get_block_size(ext4_superblock_t *);
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| 56 | extern void ext4_superblock_set_block_size(ext4_superblock_t *, uint32_t);
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| 57 | extern uint32_t ext4_superblock_get_blocks_per_group(ext4_superblock_t *);
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| 58 | extern void ext4_superblock_set_blocks_per_group(ext4_superblock_t *, uint32_t);
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| 59 | extern uint32_t ext4_superblock_get_inodes_per_group(ext4_superblock_t *);
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| 60 | extern void ext4_superblock_set_inodes_per_group(ext4_superblock_t *, uint32_t);
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| 61 | extern uint32_t ext4_superblock_get_mount_time(ext4_superblock_t *);
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| 62 | extern void ext4_superblock_set_mount_time(ext4_superblock_t *, uint32_t);
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| 63 | extern uint32_t ext4_superblock_get_write_time(ext4_superblock_t *);
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| 64 | extern void ext4_superblock_set_write_time(ext4_superblock_t *, uint32_t);
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| 65 | extern uint16_t ext4_superblock_get_mount_count(ext4_superblock_t *);
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| 66 | extern void ext4_superblock_set_mount_count(ext4_superblock_t *, uint16_t);
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| 67 | extern uint16_t ext4_superblock_get_max_mount_count(ext4_superblock_t *);
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| 68 | extern void ext4_superblock_set_max_mount_count(ext4_superblock_t *, uint16_t);
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| 69 | extern uint16_t ext4_superblock_get_magic(ext4_superblock_t *);
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| 70 | extern void ext4_superblock_set_magic(ext4_superblock_t *sb, uint16_t magic);
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| 71 | extern uint16_t ext4_superblock_get_state(ext4_superblock_t *);
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| 72 | extern void ext4_superblock_set_state(ext4_superblock_t *, uint16_t);
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| 73 | extern uint16_t ext4_superblock_get_errors(ext4_superblock_t *);
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| 74 | extern void ext4_superblock_set_errors(ext4_superblock_t *, uint16_t);
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| 75 | extern uint16_t ext4_superblock_get_minor_rev_level(ext4_superblock_t *);
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| 76 | extern void ext4_superblock_set_minor_rev_level(ext4_superblock_t *, uint16_t);
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| 77 | extern uint32_t ext4_superblock_get_last_check_time(ext4_superblock_t *);
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| 78 | extern void ext4_superblock_set_last_check_time(ext4_superblock_t *, uint32_t);
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| 79 | extern uint32_t ext4_superblock_get_check_interval(ext4_superblock_t *);
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| 80 | extern void ext4_superblock_set_check_interval(ext4_superblock_t *, uint32_t);
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| 81 | extern uint32_t ext4_superblock_get_creator_os(ext4_superblock_t *);
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| 82 | extern void ext4_superblock_set_creator_os(ext4_superblock_t *, uint32_t);
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| 83 | extern uint32_t ext4_superblock_get_rev_level(ext4_superblock_t *);
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| 84 | extern void ext4_superblock_set_rev_level(ext4_superblock_t *, uint32_t);
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| 85 | extern uint16_t ext4_superblock_get_def_resuid(ext4_superblock_t *);
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| 86 | extern void ext4_superblock_set_def_resuid(ext4_superblock_t *, uint16_t);
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| 87 | extern uint16_t ext4_superblock_get_def_resgid(ext4_superblock_t *);
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| 88 | extern void ext4_superblock_set_def_resgid(ext4_superblock_t *, uint16_t);
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| 89 | extern uint32_t ext4_superblock_get_first_inode(ext4_superblock_t *);
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| 90 | extern void ext4_superblock_set_first_inode(ext4_superblock_t *, uint32_t);
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| 91 | extern uint16_t ext4_superblock_get_inode_size(ext4_superblock_t *);
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| 92 | extern void ext4_superblock_set_inode_size(ext4_superblock_t *, uint16_t);
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| 93 | extern uint16_t ext4_superblock_get_block_group_number(ext4_superblock_t *);
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| 94 | extern void ext4_superblock_set_block_group_number(ext4_superblock_t *, uint16_t);
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| 95 | extern uint32_t ext4_superblock_get_features_compatible(ext4_superblock_t *);
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| 96 | extern void ext4_superblock_set_features_compatible(ext4_superblock_t *, uint32_t);
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| 97 | extern uint32_t ext4_superblock_get_features_incompatible(ext4_superblock_t *);
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| 98 | extern void ext4_superblock_set_features_incompatible(ext4_superblock_t *, uint32_t);
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| 99 | extern uint32_t ext4_superblock_get_features_read_only(ext4_superblock_t *);
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| 100 | extern void ext4_superblock_set_features_read_only(ext4_superblock_t *, uint32_t);
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| 101 |
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| 102 | extern const uint8_t * ext4_superblock_get_uuid(ext4_superblock_t *);
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| 103 | extern void ext4_superblock_set_uuid(ext4_superblock_t *, const uint8_t *);
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| 104 | extern const char * ext4_superblock_get_volume_name(ext4_superblock_t *);
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| 105 | extern void ext4_superblock_set_volume_name(ext4_superblock_t *, const char *);
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| 106 | extern const char * ext4_superblock_get_last_mounted(ext4_superblock_t *);
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| 107 | extern void ext4_superblock_set_last_mounted(ext4_superblock_t *, const char *);
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| 108 |
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| 109 | /*
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| 110 | uint32_t s_algorithm_usage_bitmap; // For compression
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| 111 | uint8_t s_prealloc_blocks; // Number of blocks to try to preallocate
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| 112 | uint8_t s_prealloc_dir_blocks; // Number to preallocate for dirs
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| 113 | uint16_t s_reserved_gdt_blocks; // Per group desc for online growth
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| 114 | uint8_t s_journal_uuid[16]; // UUID of journal superblock
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| 115 | uint32_t s_journal_inum; // Inode number of journal file
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| 116 | uint32_t s_journal_dev; // Device number of journal file
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| 117 | */
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| 118 | extern uint32_t ext4_superblock_get_last_orphan(ext4_superblock_t *);
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| 119 | extern void ext4_superblock_set_last_orphan(ext4_superblock_t *, uint32_t);
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| 120 | extern uint32_t* ext4_superblock_get_hash_seed(ext4_superblock_t *);
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| 121 | extern uint8_t ext4_superblock_get_default_hash_version(ext4_superblock_t *);
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| 122 | extern void ext4_superblock_set_default_hash_version(ext4_superblock_t *, uint8_t);
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| 123 | /*
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| 124 | uint8_t s_jnl_backup_type;
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| 125 | */
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| 126 |
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| 127 | extern uint16_t ext4_superblock_get_desc_size(ext4_superblock_t *);
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| 128 | extern void ext4_superblock_set_desc_size(ext4_superblock_t *, uint16_t);
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| 129 |
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| 130 | /*
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| 131 | uint32_t s_default_mount_opts; // Default mount options
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| 132 | uint32_t s_first_meta_bg; // First metablock block group
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| 133 | uint32_t s_mkfs_time; // When the filesystem was created
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| 134 | uint32_t s_jnl_blocks[17]; // Backup of the journal inode
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| 135 | uint16_t s_min_extra_isize; // All inodes have at least # bytes
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| 136 | uint16_t s_want_extra_isize; // New inodes should reserve # bytes
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| 137 | */
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| 138 | extern uint32_t ext4_superblock_get_flags(ext4_superblock_t *);
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| 139 | extern void ext4_superblock_set_flags(ext4_superblock_t *, uint32_t);
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| 140 | /*
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| 141 | uint16_t s_raid_stride; // RAID stride
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| 142 | uint16_t s_mmp_interval; // # seconds to wait in MMP checking
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| 143 | uint64_t s_mmp_block; // Block for multi-mount protection
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| 144 | uint32_t s_raid_stripe_width; // blocks on all data disks (N*stride)
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| 145 | uint8_t s_log_groups_per_flex; // FLEX_BG group size
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| 146 | uint8_t s_reserved_char_pad;
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| 147 | uint16_t s_reserved_pad;
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| 148 | uint64_t s_kbytes_written; // Number of lifetime kilobytes written
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| 149 | uint32_t s_snapshot_inum; // Inode number of active snapshot
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| 150 | uint32_t s_snapshot_id; // Sequential ID of active snapshot
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| 151 | uint64_t s_snapshot_r_blocks_count; // reserved blocks for active snapshot's future use
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| 152 | uint32_t s_snapshot_list; // inode number of the head of the on-disk snapshot list
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| 153 | uint32_t s_error_count; // number of fs errors
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| 154 | uint32_t s_first_error_time; // First time an error happened
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| 155 | uint32_t s_first_error_ino; // Inode involved in first error
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| 156 | uint64_t s_first_error_block; // block involved of first error
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| 157 | uint8_t s_first_error_func[32]; // Function where the error happened
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| 158 | uint32_t s_first_error_line; // Line number where error happened
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| 159 | uint32_t s_last_error_time; // Most recent time of an error
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| 160 | uint32_t s_last_error_ino; // Inode involved in last error
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| 161 | uint32_t s_last_error_line; // Line number where error happened
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| 162 | uint64_t s_last_error_block; // block involved of last error
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| 163 | uint8_t s_last_error_func[32]; // function where the error happened
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| 164 | uint8_t s_mount_opts[64];
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| 165 | */
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| 166 |
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| 167 | /* More complex superblock functions */
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| 168 | extern bool ext4_superblock_has_flag(ext4_superblock_t *, uint32_t);
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| 169 | extern bool ext4_superblock_has_feature_compatible(ext4_superblock_t *, uint32_t);
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| 170 | extern bool ext4_superblock_has_feature_incompatible(ext4_superblock_t *, uint32_t);
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| 171 | extern bool ext4_superblock_has_feature_read_only(ext4_superblock_t *, uint32_t);
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| 172 | extern int ext4_superblock_read_direct(service_id_t, ext4_superblock_t **);
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| 173 | extern int ext4_superblock_write_direct(service_id_t, ext4_superblock_t *);
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| 174 | extern int ext4_superblock_check_sanity(ext4_superblock_t *);
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| 175 |
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| 176 | extern uint32_t ext4_superblock_get_block_group_count(ext4_superblock_t *);
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| 177 | extern uint32_t ext4_superblock_get_blocks_in_group(ext4_superblock_t *, uint32_t);
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| 178 | extern uint32_t ext4_superblock_get_inodes_in_group(ext4_superblock_t *, uint32_t);
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| 179 |
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| 180 | #endif
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| 181 |
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| 182 | /**
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| 183 | * @}
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| 184 | */
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