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Rev | Author | Line No. | Line |
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422 | giacomo | 1 | /* |
2 | * linux/include/linux/ext3_fs.h |
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3 | * |
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4 | * Copyright (C) 1992, 1993, 1994, 1995 |
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5 | * Remy Card (card@masi.ibp.fr) |
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6 | * Laboratoire MASI - Institut Blaise Pascal |
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7 | * Universite Pierre et Marie Curie (Paris VI) |
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8 | * |
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9 | * from |
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10 | * |
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11 | * linux/include/linux/minix_fs.h |
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12 | * |
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13 | * Copyright (C) 1991, 1992 Linus Torvalds |
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14 | */ |
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15 | |||
16 | #ifndef _LINUX_EXT3_FS_H |
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17 | #define _LINUX_EXT3_FS_H |
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18 | |||
19 | #include <linux/types.h> |
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20 | #include <linux/ext3_fs_i.h> |
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21 | #include <linux/ext3_fs_sb.h> |
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22 | |||
23 | |||
24 | struct statfs; |
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25 | |||
26 | /* |
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27 | * The second extended filesystem constants/structures |
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28 | */ |
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29 | |||
30 | /* |
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31 | * Define EXT3FS_DEBUG to produce debug messages |
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32 | */ |
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33 | #undef EXT3FS_DEBUG |
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34 | |||
35 | /* |
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36 | * Define EXT3_PREALLOCATE to preallocate data blocks for expanding files |
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37 | */ |
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38 | #undef EXT3_PREALLOCATE /* @@@ Fix this! */ |
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39 | #define EXT3_DEFAULT_PREALLOC_BLOCKS 8 |
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40 | |||
41 | /* |
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42 | * Always enable hashed directories |
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43 | */ |
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44 | #define CONFIG_EXT3_INDEX |
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45 | |||
46 | /* |
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47 | * Debug code |
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48 | */ |
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49 | #ifdef EXT3FS_DEBUG |
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50 | #define ext3_debug(f, a...) \ |
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51 | do { \ |
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52 | printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \ |
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53 | __FILE__, __LINE__, __FUNCTION__); \ |
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54 | printk (KERN_DEBUG f, ## a); \ |
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55 | } while (0) |
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56 | #else |
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57 | #define ext3_debug(f, a...) do {} while (0) |
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58 | #endif |
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59 | |||
60 | /* |
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61 | * Special inodes numbers |
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62 | */ |
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63 | #define EXT3_BAD_INO 1 /* Bad blocks inode */ |
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64 | #define EXT3_ROOT_INO 2 /* Root inode */ |
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65 | #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */ |
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66 | #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
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67 | #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */ |
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68 | #define EXT3_JOURNAL_INO 8 /* Journal inode */ |
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69 | |||
70 | /* First non-reserved inode for old ext3 filesystems */ |
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71 | #define EXT3_GOOD_OLD_FIRST_INO 11 |
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72 | |||
73 | /* |
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74 | * The second extended file system magic number |
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75 | */ |
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76 | #define EXT3_SUPER_MAGIC 0xEF53 |
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77 | |||
78 | /* |
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79 | * Maximal count of links to a file |
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80 | */ |
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81 | #define EXT3_LINK_MAX 32000 |
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82 | |||
83 | /* |
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84 | * Macro-instructions used to manage several block sizes |
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85 | */ |
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86 | #define EXT3_MIN_BLOCK_SIZE 1024 |
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87 | #define EXT3_MAX_BLOCK_SIZE 4096 |
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88 | #define EXT3_MIN_BLOCK_LOG_SIZE 10 |
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89 | #ifdef __KERNEL__ |
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90 | # define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize) |
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91 | #else |
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92 | # define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
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93 | #endif |
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94 | #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32)) |
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95 | #ifdef __KERNEL__ |
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96 | # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
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97 | #else |
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98 | # define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
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99 | #endif |
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100 | #ifdef __KERNEL__ |
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101 | #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits) |
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102 | #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size) |
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103 | #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino) |
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104 | #else |
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105 | #define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \ |
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106 | EXT3_GOOD_OLD_INODE_SIZE : \ |
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107 | (s)->s_inode_size) |
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108 | #define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \ |
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109 | EXT3_GOOD_OLD_FIRST_INO : \ |
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110 | (s)->s_first_ino) |
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111 | #endif |
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112 | |||
113 | /* |
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114 | * Macro-instructions used to manage fragments |
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115 | */ |
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116 | #define EXT3_MIN_FRAG_SIZE 1024 |
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117 | #define EXT3_MAX_FRAG_SIZE 4096 |
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118 | #define EXT3_MIN_FRAG_LOG_SIZE 10 |
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119 | #ifdef __KERNEL__ |
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120 | # define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size) |
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121 | # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block) |
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122 | #else |
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123 | # define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
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124 | # define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s)) |
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125 | #endif |
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126 | |||
127 | /* |
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128 | * Structure of a blocks group descriptor |
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129 | */ |
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130 | struct ext3_group_desc |
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131 | { |
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132 | __u32 bg_block_bitmap; /* Blocks bitmap block */ |
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133 | __u32 bg_inode_bitmap; /* Inodes bitmap block */ |
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134 | __u32 bg_inode_table; /* Inodes table block */ |
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135 | __u16 bg_free_blocks_count; /* Free blocks count */ |
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136 | __u16 bg_free_inodes_count; /* Free inodes count */ |
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137 | __u16 bg_used_dirs_count; /* Directories count */ |
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138 | __u16 bg_pad; |
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139 | __u32 bg_reserved[3]; |
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140 | }; |
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141 | |||
142 | /* |
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143 | * Macro-instructions used to manage group descriptors |
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144 | */ |
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145 | #ifdef __KERNEL__ |
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146 | # define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group) |
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147 | # define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block) |
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148 | # define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group) |
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149 | # define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits) |
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150 | #else |
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151 | # define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
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152 | # define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc)) |
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153 | # define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
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154 | #endif |
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155 | |||
156 | /* |
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157 | * Constants relative to the data blocks |
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158 | */ |
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159 | #define EXT3_NDIR_BLOCKS 12 |
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160 | #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS |
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161 | #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1) |
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162 | #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1) |
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163 | #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1) |
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164 | |||
165 | /* |
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166 | * Inode flags |
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167 | */ |
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168 | #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */ |
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169 | #define EXT3_UNRM_FL 0x00000002 /* Undelete */ |
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170 | #define EXT3_COMPR_FL 0x00000004 /* Compress file */ |
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171 | #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */ |
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172 | #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
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173 | #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */ |
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174 | #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */ |
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175 | #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */ |
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176 | /* Reserved for compression usage... */ |
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177 | #define EXT3_DIRTY_FL 0x00000100 |
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178 | #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ |
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179 | #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */ |
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180 | #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */ |
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181 | /* End compression flags --- maybe not all used */ |
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182 | #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */ |
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183 | #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */ |
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184 | #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ |
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185 | #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
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186 | #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ |
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187 | #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ |
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188 | #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */ |
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189 | |||
190 | #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ |
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191 | #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
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192 | |||
193 | /* |
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194 | * Inode dynamic state flags |
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195 | */ |
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196 | #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */ |
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197 | #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */ |
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198 | |||
199 | /* |
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200 | * ioctl commands |
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201 | */ |
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202 | #define EXT3_IOC_GETFLAGS _IOR('f', 1, long) |
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203 | #define EXT3_IOC_SETFLAGS _IOW('f', 2, long) |
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204 | #define EXT3_IOC_GETVERSION _IOR('f', 3, long) |
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205 | #define EXT3_IOC_SETVERSION _IOW('f', 4, long) |
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206 | #define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long) |
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207 | #define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long) |
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208 | #ifdef CONFIG_JBD_DEBUG |
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209 | #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
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210 | #endif |
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211 | |||
212 | /* |
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213 | * Structure of an inode on the disk |
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214 | */ |
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215 | struct ext3_inode { |
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216 | __u16 i_mode; /* File mode */ |
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217 | __u16 i_uid; /* Low 16 bits of Owner Uid */ |
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218 | __u32 i_size; /* Size in bytes */ |
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219 | __u32 i_atime; /* Access time */ |
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220 | __u32 i_ctime; /* Creation time */ |
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221 | __u32 i_mtime; /* Modification time */ |
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222 | __u32 i_dtime; /* Deletion Time */ |
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223 | __u16 i_gid; /* Low 16 bits of Group Id */ |
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224 | __u16 i_links_count; /* Links count */ |
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225 | __u32 i_blocks; /* Blocks count */ |
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226 | __u32 i_flags; /* File flags */ |
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227 | union { |
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228 | struct { |
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229 | __u32 l_i_reserved1; |
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230 | } linux1; |
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231 | struct { |
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232 | __u32 h_i_translator; |
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233 | } hurd1; |
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234 | struct { |
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235 | __u32 m_i_reserved1; |
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236 | } masix1; |
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237 | } osd1; /* OS dependent 1 */ |
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238 | __u32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */ |
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239 | __u32 i_generation; /* File version (for NFS) */ |
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240 | __u32 i_file_acl; /* File ACL */ |
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241 | __u32 i_dir_acl; /* Directory ACL */ |
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242 | __u32 i_faddr; /* Fragment address */ |
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243 | union { |
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244 | struct { |
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245 | __u8 l_i_frag; /* Fragment number */ |
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246 | __u8 l_i_fsize; /* Fragment size */ |
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247 | __u16 i_pad1; |
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248 | __u16 l_i_uid_high; /* these 2 fields */ |
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249 | __u16 l_i_gid_high; /* were reserved2[0] */ |
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250 | __u32 l_i_reserved2; |
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251 | } linux2; |
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252 | struct { |
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253 | __u8 h_i_frag; /* Fragment number */ |
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254 | __u8 h_i_fsize; /* Fragment size */ |
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255 | __u16 h_i_mode_high; |
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256 | __u16 h_i_uid_high; |
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257 | __u16 h_i_gid_high; |
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258 | __u32 h_i_author; |
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259 | } hurd2; |
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260 | struct { |
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261 | __u8 m_i_frag; /* Fragment number */ |
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262 | __u8 m_i_fsize; /* Fragment size */ |
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263 | __u16 m_pad1; |
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264 | __u32 m_i_reserved2[2]; |
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265 | } masix2; |
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266 | } osd2; /* OS dependent 2 */ |
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267 | }; |
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268 | |||
269 | #define i_size_high i_dir_acl |
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270 | |||
271 | #if defined(__KERNEL__) || defined(__linux__) |
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272 | #define i_reserved1 osd1.linux1.l_i_reserved1 |
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273 | #define i_frag osd2.linux2.l_i_frag |
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274 | #define i_fsize osd2.linux2.l_i_fsize |
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275 | #define i_uid_low i_uid |
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276 | #define i_gid_low i_gid |
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277 | #define i_uid_high osd2.linux2.l_i_uid_high |
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278 | #define i_gid_high osd2.linux2.l_i_gid_high |
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279 | #define i_reserved2 osd2.linux2.l_i_reserved2 |
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280 | |||
281 | #elif defined(__GNU__) |
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282 | |||
283 | #define i_translator osd1.hurd1.h_i_translator |
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284 | #define i_frag osd2.hurd2.h_i_frag; |
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285 | #define i_fsize osd2.hurd2.h_i_fsize; |
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286 | #define i_uid_high osd2.hurd2.h_i_uid_high |
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287 | #define i_gid_high osd2.hurd2.h_i_gid_high |
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288 | #define i_author osd2.hurd2.h_i_author |
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289 | |||
290 | #elif defined(__masix__) |
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291 | |||
292 | #define i_reserved1 osd1.masix1.m_i_reserved1 |
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293 | #define i_frag osd2.masix2.m_i_frag |
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294 | #define i_fsize osd2.masix2.m_i_fsize |
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295 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
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296 | |||
297 | #endif /* defined(__KERNEL__) || defined(__linux__) */ |
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298 | |||
299 | /* |
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300 | * File system states |
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301 | */ |
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302 | #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */ |
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303 | #define EXT3_ERROR_FS 0x0002 /* Errors detected */ |
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304 | #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */ |
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305 | |||
306 | /* |
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307 | * Mount flags |
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308 | */ |
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309 | #define EXT3_MOUNT_CHECK 0x0001 /* Do mount-time checks */ |
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310 | #define EXT3_MOUNT_OLDALLOC 0x0002 /* Don't use the new Orlov allocator */ |
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311 | #define EXT3_MOUNT_GRPID 0x0004 /* Create files with directory's group */ |
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312 | #define EXT3_MOUNT_DEBUG 0x0008 /* Some debugging messages */ |
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313 | #define EXT3_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ |
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314 | #define EXT3_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ |
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315 | #define EXT3_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ |
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316 | #define EXT3_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ |
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317 | #define EXT3_MOUNT_NOLOAD 0x0100 /* Don't use existing journal*/ |
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318 | #define EXT3_MOUNT_ABORT 0x0200 /* Fatal error detected */ |
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319 | #define EXT3_MOUNT_DATA_FLAGS 0x0C00 /* Mode for data writes: */ |
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320 | #define EXT3_MOUNT_JOURNAL_DATA 0x0400 /* Write data to journal */ |
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321 | #define EXT3_MOUNT_ORDERED_DATA 0x0800 /* Flush data before commit */ |
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322 | #define EXT3_MOUNT_WRITEBACK_DATA 0x0C00 /* No data ordering */ |
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323 | #define EXT3_MOUNT_UPDATE_JOURNAL 0x1000 /* Update the journal format */ |
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324 | #define EXT3_MOUNT_NO_UID32 0x2000 /* Disable 32-bit UIDs */ |
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325 | #define EXT3_MOUNT_XATTR_USER 0x4000 /* Extended user attributes */ |
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326 | #define EXT3_MOUNT_POSIX_ACL 0x8000 /* POSIX Access Control Lists */ |
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327 | |||
328 | /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */ |
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329 | #ifndef _LINUX_EXT2_FS_H |
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330 | #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt |
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331 | #define set_opt(o, opt) o |= EXT3_MOUNT_##opt |
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332 | #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \ |
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333 | EXT3_MOUNT_##opt) |
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334 | #else |
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335 | #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD |
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336 | #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT |
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337 | #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS |
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338 | #endif |
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339 | |||
340 | #define ext3_set_bit ext2_set_bit |
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341 | #define ext3_set_bit_atomic ext2_set_bit_atomic |
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342 | #define ext3_clear_bit ext2_clear_bit |
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343 | #define ext3_clear_bit_atomic ext2_clear_bit_atomic |
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344 | #define ext3_test_bit ext2_test_bit |
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345 | #define ext3_find_first_zero_bit ext2_find_first_zero_bit |
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346 | #define ext3_find_next_zero_bit ext2_find_next_zero_bit |
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347 | |||
348 | /* |
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349 | * Maximal mount counts between two filesystem checks |
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350 | */ |
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351 | #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
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352 | #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
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353 | |||
354 | /* |
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355 | * Behaviour when detecting errors |
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356 | */ |
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357 | #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */ |
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358 | #define EXT3_ERRORS_RO 2 /* Remount fs read-only */ |
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359 | #define EXT3_ERRORS_PANIC 3 /* Panic */ |
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360 | #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE |
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361 | |||
362 | /* |
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363 | * Structure of the super block |
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364 | */ |
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365 | struct ext3_super_block { |
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366 | /*00*/ __u32 s_inodes_count; /* Inodes count */ |
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367 | __u32 s_blocks_count; /* Blocks count */ |
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368 | __u32 s_r_blocks_count; /* Reserved blocks count */ |
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369 | __u32 s_free_blocks_count; /* Free blocks count */ |
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370 | /*10*/ __u32 s_free_inodes_count; /* Free inodes count */ |
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371 | __u32 s_first_data_block; /* First Data Block */ |
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372 | __u32 s_log_block_size; /* Block size */ |
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373 | __s32 s_log_frag_size; /* Fragment size */ |
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374 | /*20*/ __u32 s_blocks_per_group; /* # Blocks per group */ |
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375 | __u32 s_frags_per_group; /* # Fragments per group */ |
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376 | __u32 s_inodes_per_group; /* # Inodes per group */ |
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377 | __u32 s_mtime; /* Mount time */ |
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378 | /*30*/ __u32 s_wtime; /* Write time */ |
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379 | __u16 s_mnt_count; /* Mount count */ |
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380 | __s16 s_max_mnt_count; /* Maximal mount count */ |
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381 | __u16 s_magic; /* Magic signature */ |
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382 | __u16 s_state; /* File system state */ |
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383 | __u16 s_errors; /* Behaviour when detecting errors */ |
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384 | __u16 s_minor_rev_level; /* minor revision level */ |
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385 | /*40*/ __u32 s_lastcheck; /* time of last check */ |
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386 | __u32 s_checkinterval; /* max. time between checks */ |
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387 | __u32 s_creator_os; /* OS */ |
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388 | __u32 s_rev_level; /* Revision level */ |
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389 | /*50*/ __u16 s_def_resuid; /* Default uid for reserved blocks */ |
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390 | __u16 s_def_resgid; /* Default gid for reserved blocks */ |
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391 | /* |
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392 | * These fields are for EXT3_DYNAMIC_REV superblocks only. |
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393 | * |
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394 | * Note: the difference between the compatible feature set and |
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395 | * the incompatible feature set is that if there is a bit set |
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396 | * in the incompatible feature set that the kernel doesn't |
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397 | * know about, it should refuse to mount the filesystem. |
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398 | * |
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399 | * e2fsck's requirements are more strict; if it doesn't know |
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400 | * about a feature in either the compatible or incompatible |
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401 | * feature set, it must abort and not try to meddle with |
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402 | * things it doesn't understand... |
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403 | */ |
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404 | __u32 s_first_ino; /* First non-reserved inode */ |
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405 | __u16 s_inode_size; /* size of inode structure */ |
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406 | __u16 s_block_group_nr; /* block group # of this superblock */ |
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407 | __u32 s_feature_compat; /* compatible feature set */ |
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408 | /*60*/ __u32 s_feature_incompat; /* incompatible feature set */ |
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409 | __u32 s_feature_ro_compat; /* readonly-compatible feature set */ |
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410 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
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411 | /*78*/ char s_volume_name[16]; /* volume name */ |
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412 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ |
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413 | /*C8*/ __u32 s_algorithm_usage_bitmap; /* For compression */ |
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414 | /* |
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415 | * Performance hints. Directory preallocation should only |
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416 | * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
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417 | */ |
||
418 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ |
||
419 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ |
||
420 | __u16 s_padding1; |
||
421 | /* |
||
422 | * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. |
||
423 | */ |
||
424 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
||
425 | /*E0*/ __u32 s_journal_inum; /* inode number of journal file */ |
||
426 | __u32 s_journal_dev; /* device number of journal file */ |
||
427 | __u32 s_last_orphan; /* start of list of inodes to delete */ |
||
428 | __u32 s_hash_seed[4]; /* HTREE hash seed */ |
||
429 | __u8 s_def_hash_version; /* Default hash version to use */ |
||
430 | __u8 s_reserved_char_pad; |
||
431 | __u16 s_reserved_word_pad; |
||
432 | __u32 s_default_mount_opts; |
||
433 | __u32 s_first_meta_bg; /* First metablock block group */ |
||
434 | __u32 s_reserved[190]; /* Padding to the end of the block */ |
||
435 | }; |
||
436 | |||
437 | #ifdef __KERNEL__ |
||
438 | static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb) |
||
439 | { |
||
440 | return sb->s_fs_info; |
||
441 | } |
||
442 | static inline struct ext3_inode_info *EXT3_I(struct inode *inode) |
||
443 | { |
||
444 | return container_of(inode, struct ext3_inode_info, vfs_inode); |
||
445 | } |
||
446 | #else |
||
447 | /* Assume that user mode programs are passing in an ext3fs superblock, not |
||
448 | * a kernel struct super_block. This will allow us to call the feature-test |
||
449 | * macros from user land. */ |
||
450 | #define EXT3_SB(sb) (sb) |
||
451 | #endif |
||
452 | |||
453 | #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime |
||
454 | |||
455 | /* |
||
456 | * Codes for operating systems |
||
457 | */ |
||
458 | #define EXT3_OS_LINUX 0 |
||
459 | #define EXT3_OS_HURD 1 |
||
460 | #define EXT3_OS_MASIX 2 |
||
461 | #define EXT3_OS_FREEBSD 3 |
||
462 | #define EXT3_OS_LITES 4 |
||
463 | |||
464 | /* |
||
465 | * Revision levels |
||
466 | */ |
||
467 | #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */ |
||
468 | #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
||
469 | |||
470 | #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV |
||
471 | #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV |
||
472 | |||
473 | #define EXT3_GOOD_OLD_INODE_SIZE 128 |
||
474 | |||
475 | /* |
||
476 | * Feature set definitions |
||
477 | */ |
||
478 | |||
479 | #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \ |
||
480 | ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) |
||
481 | #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
||
482 | ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) |
||
483 | #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \ |
||
484 | ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) |
||
485 | #define EXT3_SET_COMPAT_FEATURE(sb,mask) \ |
||
486 | EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) |
||
487 | #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \ |
||
488 | EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) |
||
489 | #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \ |
||
490 | EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) |
||
491 | #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \ |
||
492 | EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) |
||
493 | #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ |
||
494 | EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) |
||
495 | #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \ |
||
496 | EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) |
||
497 | |||
498 | #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
||
499 | #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002 |
||
500 | #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 |
||
501 | #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008 |
||
502 | #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010 |
||
503 | #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020 |
||
504 | |||
505 | #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
||
506 | #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 |
||
507 | #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 |
||
508 | |||
509 | #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001 |
||
510 | #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002 |
||
511 | #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ |
||
512 | #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ |
||
513 | #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010 |
||
514 | |||
515 | #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR |
||
516 | #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \ |
||
517 | EXT3_FEATURE_INCOMPAT_RECOVER| \ |
||
518 | EXT3_FEATURE_INCOMPAT_META_BG) |
||
519 | #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
||
520 | EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \ |
||
521 | EXT3_FEATURE_RO_COMPAT_BTREE_DIR) |
||
522 | |||
523 | /* |
||
524 | * Default values for user and/or group using reserved blocks |
||
525 | */ |
||
526 | #define EXT3_DEF_RESUID 0 |
||
527 | #define EXT3_DEF_RESGID 0 |
||
528 | |||
529 | /* |
||
530 | * Default mount options |
||
531 | */ |
||
532 | #define EXT3_DEFM_DEBUG 0x0001 |
||
533 | #define EXT3_DEFM_BSDGROUPS 0x0002 |
||
534 | #define EXT3_DEFM_XATTR_USER 0x0004 |
||
535 | #define EXT3_DEFM_ACL 0x0008 |
||
536 | #define EXT3_DEFM_UID16 0x0010 |
||
537 | #define EXT3_DEFM_JMODE 0x0060 |
||
538 | #define EXT3_DEFM_JMODE_DATA 0x0020 |
||
539 | #define EXT3_DEFM_JMODE_ORDERED 0x0040 |
||
540 | #define EXT3_DEFM_JMODE_WBACK 0x0060 |
||
541 | |||
542 | /* |
||
543 | * Structure of a directory entry |
||
544 | */ |
||
545 | #define EXT3_NAME_LEN 255 |
||
546 | |||
547 | struct ext3_dir_entry { |
||
548 | __u32 inode; /* Inode number */ |
||
549 | __u16 rec_len; /* Directory entry length */ |
||
550 | __u16 name_len; /* Name length */ |
||
551 | char name[EXT3_NAME_LEN]; /* File name */ |
||
552 | }; |
||
553 | |||
554 | /* |
||
555 | * The new version of the directory entry. Since EXT3 structures are |
||
556 | * stored in intel byte order, and the name_len field could never be |
||
557 | * bigger than 255 chars, it's safe to reclaim the extra byte for the |
||
558 | * file_type field. |
||
559 | */ |
||
560 | struct ext3_dir_entry_2 { |
||
561 | __u32 inode; /* Inode number */ |
||
562 | __u16 rec_len; /* Directory entry length */ |
||
563 | __u8 name_len; /* Name length */ |
||
564 | __u8 file_type; |
||
565 | char name[EXT3_NAME_LEN]; /* File name */ |
||
566 | }; |
||
567 | |||
568 | /* |
||
569 | * Ext3 directory file types. Only the low 3 bits are used. The |
||
570 | * other bits are reserved for now. |
||
571 | */ |
||
572 | #define EXT3_FT_UNKNOWN 0 |
||
573 | #define EXT3_FT_REG_FILE 1 |
||
574 | #define EXT3_FT_DIR 2 |
||
575 | #define EXT3_FT_CHRDEV 3 |
||
576 | #define EXT3_FT_BLKDEV 4 |
||
577 | #define EXT3_FT_FIFO 5 |
||
578 | #define EXT3_FT_SOCK 6 |
||
579 | #define EXT3_FT_SYMLINK 7 |
||
580 | |||
581 | #define EXT3_FT_MAX 8 |
||
582 | |||
583 | /* |
||
584 | * EXT3_DIR_PAD defines the directory entries boundaries |
||
585 | * |
||
586 | * NOTE: It must be a multiple of 4 |
||
587 | */ |
||
588 | #define EXT3_DIR_PAD 4 |
||
589 | #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1) |
||
590 | #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \ |
||
591 | ~EXT3_DIR_ROUND) |
||
592 | /* |
||
593 | * Hash Tree Directory indexing |
||
594 | * (c) Daniel Phillips, 2001 |
||
595 | */ |
||
596 | |||
597 | #ifdef CONFIG_EXT3_INDEX |
||
598 | #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \ |
||
599 | EXT3_FEATURE_COMPAT_DIR_INDEX) && \ |
||
600 | (EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) |
||
601 | #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX) |
||
602 | #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) |
||
603 | #else |
||
604 | #define is_dx(dir) 0 |
||
605 | #define EXT3_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT3_LINK_MAX) |
||
606 | #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2) |
||
607 | #endif |
||
608 | |||
609 | /* Legal values for the dx_root hash_version field: */ |
||
610 | |||
611 | #define DX_HASH_LEGACY 0 |
||
612 | #define DX_HASH_HALF_MD4 1 |
||
613 | #define DX_HASH_TEA 2 |
||
614 | |||
615 | /* hash info structure used by the directory hash */ |
||
616 | struct dx_hash_info |
||
617 | { |
||
618 | u32 hash; |
||
619 | u32 minor_hash; |
||
620 | int hash_version; |
||
621 | u32 *seed; |
||
622 | }; |
||
623 | |||
624 | #define EXT3_HTREE_EOF 0x7fffffff |
||
625 | |||
626 | #ifdef __KERNEL__ |
||
627 | /* |
||
628 | * Control parameters used by ext3_htree_next_block |
||
629 | */ |
||
630 | #define HASH_NB_ALWAYS 1 |
||
631 | |||
632 | |||
633 | /* |
||
634 | * Describe an inode's exact location on disk and in memory |
||
635 | */ |
||
636 | struct ext3_iloc |
||
637 | { |
||
638 | struct buffer_head *bh; |
||
639 | unsigned long offset; |
||
640 | unsigned long block_group; |
||
641 | }; |
||
642 | |||
643 | static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc) |
||
644 | { |
||
645 | return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset); |
||
646 | } |
||
647 | |||
648 | /* |
||
649 | * This structure is stuffed into the struct file's private_data field |
||
650 | * for directories. It is where we put information so that we can do |
||
651 | * readdir operations in hash tree order. |
||
652 | */ |
||
653 | struct dir_private_info { |
||
654 | struct rb_root root; |
||
655 | struct rb_node *curr_node; |
||
656 | struct fname *extra_fname; |
||
657 | loff_t last_pos; |
||
658 | __u32 curr_hash; |
||
659 | __u32 curr_minor_hash; |
||
660 | __u32 next_hash; |
||
661 | }; |
||
662 | |||
663 | /* |
||
664 | * Special error return code only used by dx_probe() and its callers. |
||
665 | */ |
||
666 | #define ERR_BAD_DX_DIR -75000 |
||
667 | |||
668 | /* |
||
669 | * Function prototypes |
||
670 | */ |
||
671 | |||
672 | /* |
||
673 | * Ok, these declarations are also in <linux/kernel.h> but none of the |
||
674 | * ext3 source programs needs to include it so they are duplicated here. |
||
675 | */ |
||
676 | # define NORET_TYPE /**/ |
||
677 | # define ATTRIB_NORET __attribute__((noreturn)) |
||
678 | # define NORET_AND noreturn, |
||
679 | |||
680 | /* balloc.c */ |
||
681 | extern int ext3_bg_has_super(struct super_block *sb, int group); |
||
682 | extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group); |
||
683 | extern int ext3_new_block (handle_t *, struct inode *, unsigned long, |
||
684 | __u32 *, __u32 *, int *); |
||
685 | extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long, |
||
686 | unsigned long); |
||
687 | extern unsigned long ext3_count_free_blocks (struct super_block *); |
||
688 | extern void ext3_check_blocks_bitmap (struct super_block *); |
||
689 | extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb, |
||
690 | unsigned int block_group, |
||
691 | struct buffer_head ** bh); |
||
692 | |||
693 | /* dir.c */ |
||
694 | extern int ext3_check_dir_entry(const char *, struct inode *, |
||
695 | struct ext3_dir_entry_2 *, |
||
696 | struct buffer_head *, unsigned long); |
||
697 | extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash, |
||
698 | __u32 minor_hash, |
||
699 | struct ext3_dir_entry_2 *dirent); |
||
700 | extern void ext3_htree_free_dir_info(struct dir_private_info *p); |
||
701 | |||
702 | /* fsync.c */ |
||
703 | extern int ext3_sync_file (struct file *, struct dentry *, int); |
||
704 | |||
705 | /* hash.c */ |
||
706 | extern int ext3fs_dirhash(const char *name, int len, struct |
||
707 | dx_hash_info *hinfo); |
||
708 | |||
709 | /* ialloc.c */ |
||
710 | extern struct inode * ext3_new_inode (handle_t *, struct inode *, int); |
||
711 | extern void ext3_free_inode (handle_t *, struct inode *); |
||
712 | extern struct inode * ext3_orphan_get (struct super_block *, unsigned long); |
||
713 | extern unsigned long ext3_count_free_inodes (struct super_block *); |
||
714 | extern unsigned long ext3_count_dirs (struct super_block *); |
||
715 | extern void ext3_check_inodes_bitmap (struct super_block *); |
||
716 | extern unsigned long ext3_count_free (struct buffer_head *, unsigned); |
||
717 | |||
718 | |||
719 | /* inode.c */ |
||
720 | extern int ext3_forget(handle_t *, int, struct inode *, struct buffer_head *, int); |
||
721 | extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *); |
||
722 | extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *); |
||
723 | |||
724 | extern void ext3_read_inode (struct inode *); |
||
725 | extern void ext3_write_inode (struct inode *, int); |
||
726 | extern int ext3_setattr (struct dentry *, struct iattr *); |
||
727 | extern void ext3_put_inode (struct inode *); |
||
728 | extern void ext3_delete_inode (struct inode *); |
||
729 | extern int ext3_sync_inode (handle_t *, struct inode *); |
||
730 | extern void ext3_discard_prealloc (struct inode *); |
||
731 | extern void ext3_dirty_inode(struct inode *); |
||
732 | extern int ext3_change_inode_journal_flag(struct inode *, int); |
||
733 | extern void ext3_truncate (struct inode *); |
||
734 | extern void ext3_set_inode_flags(struct inode *); |
||
735 | extern void ext3_set_aops(struct inode *inode); |
||
736 | |||
737 | /* ioctl.c */ |
||
738 | extern int ext3_ioctl (struct inode *, struct file *, unsigned int, |
||
739 | unsigned long); |
||
740 | |||
741 | /* namei.c */ |
||
742 | extern int ext3_orphan_add(handle_t *, struct inode *); |
||
743 | extern int ext3_orphan_del(handle_t *, struct inode *); |
||
744 | extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash, |
||
745 | __u32 start_minor_hash, __u32 *next_hash); |
||
746 | |||
747 | /* super.c */ |
||
748 | extern void ext3_error (struct super_block *, const char *, const char *, ...) |
||
749 | __attribute__ ((format (printf, 3, 4))); |
||
750 | extern void __ext3_std_error (struct super_block *, const char *, int); |
||
751 | extern void ext3_abort (struct super_block *, const char *, const char *, ...) |
||
752 | __attribute__ ((format (printf, 3, 4))); |
||
753 | extern NORET_TYPE void ext3_panic (struct super_block *, const char *, |
||
754 | const char *, ...) |
||
755 | __attribute__ ((NORET_AND format (printf, 3, 4))); |
||
756 | extern void ext3_warning (struct super_block *, const char *, const char *, ...) |
||
757 | __attribute__ ((format (printf, 3, 4))); |
||
758 | extern void ext3_update_dynamic_rev (struct super_block *sb); |
||
759 | extern void ext3_put_super (struct super_block *); |
||
760 | extern void ext3_write_super (struct super_block *); |
||
761 | extern void ext3_write_super_lockfs (struct super_block *); |
||
762 | extern void ext3_unlockfs (struct super_block *); |
||
763 | extern int ext3_remount (struct super_block *, int *, char *); |
||
764 | extern int ext3_statfs (struct super_block *, struct kstatfs *); |
||
765 | |||
766 | #define ext3_std_error(sb, errno) \ |
||
767 | do { \ |
||
768 | if ((errno)) \ |
||
769 | __ext3_std_error((sb), __FUNCTION__, (errno)); \ |
||
770 | } while (0) |
||
771 | extern const char *ext3_decode_error(struct super_block *sb, int errno, char nbuf[16]); |
||
772 | |||
773 | /* |
||
774 | * Inodes and files operations |
||
775 | */ |
||
776 | |||
777 | /* dir.c */ |
||
778 | extern struct file_operations ext3_dir_operations; |
||
779 | |||
780 | /* file.c */ |
||
781 | extern struct inode_operations ext3_file_inode_operations; |
||
782 | extern struct file_operations ext3_file_operations; |
||
783 | |||
784 | /* namei.c */ |
||
785 | extern struct inode_operations ext3_dir_inode_operations; |
||
786 | extern struct inode_operations ext3_special_inode_operations; |
||
787 | |||
788 | /* symlink.c */ |
||
789 | extern struct inode_operations ext3_symlink_inode_operations; |
||
790 | extern struct inode_operations ext3_fast_symlink_inode_operations; |
||
791 | |||
792 | |||
793 | #endif /* __KERNEL__ */ |
||
794 | |||
795 | #endif /* _LINUX_EXT3_FS_H */ |