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annotate toys/e2fs.h @ 1005:03f72b57a092

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DHCP client and server, from Ashwini Sharma.
author Rob Landley <rob@landley.net>
date Wed, 14 Aug 2013 19:09:33 -0500
parents 786841fdb1e0
children
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1 /* mke2fs.h - Headers for ext2
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2 *
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3 * Copyright 2006 Rob Landley <rob@landley.net>
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4 */
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6 // Stuff defined in linux/ext2_fs.h
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8 #define EXT2_SUPER_MAGIC 0xEF53
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10 struct ext2_superblock {
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11 uint32_t inodes_count; // Inodes count
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12 uint32_t blocks_count; // Blocks count
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13 uint32_t r_blocks_count; // Reserved blocks count
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14 uint32_t free_blocks_count; // Free blocks count
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15 uint32_t free_inodes_count; // Free inodes count
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16 uint32_t first_data_block; // First Data Block
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17 uint32_t log_block_size; // Block size
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18 uint32_t log_frag_size; // Fragment size
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19 uint32_t blocks_per_group; // Blocks per group
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20 uint32_t frags_per_group; // Fragments per group
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21 uint32_t inodes_per_group; // Inodes per group
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22 uint32_t mtime; // Mount time
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23 uint32_t wtime; // Write time
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24 uint16_t mnt_count; // Mount count
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25 uint16_t max_mnt_count; // Maximal mount count
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26 uint16_t magic; // Magic signature
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27 uint16_t state; // File system state
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28 uint16_t errors; // Behaviour when detecting errors
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29 uint16_t minor_rev_level; // minor revision level
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30 uint32_t lastcheck; // time of last check
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31 uint32_t checkinterval; // max. time between checks
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32 uint32_t creator_os; // OS
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33 uint32_t rev_level; // Revision level
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34 uint16_t def_resuid; // Default uid for reserved blocks
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35 uint16_t def_resgid; // Default gid for reserved blocks
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36 uint32_t first_ino; // First non-reserved inode
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37 uint16_t inode_size; // size of inode structure
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38 uint16_t block_group_nr; // block group # of this superblock
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39 uint32_t feature_compat; // compatible feature set
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40 uint32_t feature_incompat; // incompatible feature set
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41 uint32_t feature_ro_compat; // readonly-compatible feature set
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42 char uuid[16]; // 128-bit uuid for volume
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43 char volume_name[16]; // volume name
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44 char last_mounted[64]; // directory where last mounted
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45 uint32_t alg_usage_bitmap; // For compression
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46 // For EXT2_COMPAT_PREALLOC
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47 uint8_t prealloc_blocks; // Nr of blocks to try to preallocate
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48 uint8_t prealloc_dir_blocks; //Nr to preallocate for dirs
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49 uint16_t padding1;
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50 // For EXT3_FEATURE_COMPAT_HAS_JOURNAL
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51 uint8_t journal_uuid[16]; // uuid of journal superblock
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52 uint32_t journal_inum; // inode number of journal file
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53 uint32_t journal_dev; // device number of journal file
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54 uint32_t last_orphan; // start of list of inodes to delete
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55 uint32_t hash_seed[4]; // HTREE hash seed
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56 uint8_t def_hash_version; // Default hash version to use
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57 uint8_t padding2[3];
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58 uint32_t default_mount_opts;
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59 uint32_t first_meta_bg; // First metablock block group
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60 uint32_t mkfs_time; // Creation timestamp
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61 uint32_t jnl_blocks[17]; // Backup of journal inode
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62 // uint32_t reserved[172]; // Padding to the end of the block
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63 };
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65 struct ext2_group
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66 {
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67 uint32_t block_bitmap; // Block number of block bitmap
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68 uint32_t inode_bitmap; // Block number of inode bitmap
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69 uint32_t inode_table; // Block number of inode table
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70 uint16_t free_blocks_count; // How many free blocks in this group?
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71 uint16_t free_inodes_count; // How many free inodes in this group?
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72 uint16_t used_dirs_count; // How many directories?
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73 uint16_t reserved[7]; // pad to 32 bytes
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74 };
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76 struct ext2_dentry {
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77 uint32_t inode; // Inode number
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78 uint16_t rec_len; // Directory entry length
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79 uint8_t name_len; // Name length
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80 uint8_t file_type;
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81 char name[0]; // File name
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82 };
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84 struct ext2_inode {
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85 uint16_t mode; // File mode
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86 uint16_t uid; // Low 16 bits of Owner Uid
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87 uint32_t size; // Size in bytes
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88 uint32_t atime; // Access time
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89 uint32_t ctime; // Creation time
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90 uint32_t mtime; // Modification time
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91 uint32_t dtime; // Deletion Time
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92 uint16_t gid; // Low 16 bits of Group Id
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93 uint16_t links_count; // Links count
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94 uint32_t blocks; // Blocks count
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95 uint32_t flags; // File flags
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96 uint32_t reserved1;
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97 uint32_t block[15]; // Pointers to blocks
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98 uint32_t generation; // File version (for NFS)
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99 uint32_t file_acl; // File ACL
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100 uint32_t dir_acl; // Directory ACL (or top bits of file length)
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101 uint32_t faddr; // Last block in file
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102 uint8_t frag; // Fragment number
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103 uint8_t fsize; // Fragment size
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104 uint16_t pad1;
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105 uint16_t uid_high; // High bits of uid
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106 uint16_t gid_high; // High bits of gid
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107 uint32_t reserved2;
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108 };
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109
75
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110 #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
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111 #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
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112 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
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113 #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
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114 #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
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115 #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
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116
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117 #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
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118 #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
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119 #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
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120
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121 #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
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122 #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
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123 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
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124 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
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125 #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
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126
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127 #define EXT2_NAME_LEN 255
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128
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129 // Ext2 directory file types. Only the low 3 bits are used. The
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130 // other bits are reserved for now.
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131
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132 enum {
694
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133 EXT2_FT_UNKNOWN,
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134 EXT2_FT_REG_FILE,
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135 EXT2_FT_DIR,
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136 EXT2_FT_CHRDEV,
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137 EXT2_FT_BLKDEV,
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138 EXT2_FT_FIFO,
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139 EXT2_FT_SOCK,
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140 EXT2_FT_SYMLINK,
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141 EXT2_FT_MAX
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142 };