1 | /* $Id: extvfs.cpp 80633 2019-09-06 16:35:36Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Ext2/3/4 Virtual Filesystem.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2012-2019 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*********************************************************************************************************************************
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29 | * Header Files *
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30 | *********************************************************************************************************************************/
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31 | #define LOG_GROUP RTLOGGROUP_FS
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32 | #include <iprt/fsvfs.h>
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33 |
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34 | #include <iprt/asm.h>
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35 | #include <iprt/assert.h>
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36 | #include <iprt/avl.h>
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37 | #include <iprt/file.h>
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38 | #include <iprt/err.h>
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39 | #include <iprt/list.h>
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40 | #include <iprt/log.h>
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41 | #include <iprt/mem.h>
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42 | #include <iprt/string.h>
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43 | #include <iprt/vfs.h>
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44 | #include <iprt/vfslowlevel.h>
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45 | #include <iprt/formats/ext.h>
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46 |
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47 |
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48 | /*********************************************************************************************************************************
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49 | * Defined Constants And Macros *
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50 | *********************************************************************************************************************************/
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51 | /** The maximum block group cache size (in bytes). */
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52 | #if ARCH_BITS >= 64
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53 | # define RTFSEXT_MAX_BLOCK_GROUP_CACHE_SIZE _512K
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54 | #else
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55 | # define RTFSEXT_MAX_BLOCK_GROUP_CACHE_SIZE _128K
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56 | #endif
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57 | /** The maximum inode cache size (in bytes). */
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58 | #if ARCH_BITS >= 64
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59 | # define RTFSEXT_MAX_INODE_CACHE_SIZE _512K
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60 | #else
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61 | # define RTFSEXT_MAX_INODE_CACHE_SIZE _128K
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62 | #endif
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63 | /** The maximum extent/block map cache size (in bytes). */
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64 | #if ARCH_BITS >= 64
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65 | # define RTFSEXT_MAX_BLOCK_CACHE_SIZE _512K
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66 | #else
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67 | # define RTFSEXT_MAX_BLOCK_CACHE_SIZE _128K
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68 | #endif
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69 |
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70 | /** All supported incompatible features. */
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71 | #define RTFSEXT_INCOMPAT_FEATURES_SUPP ( EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE | EXT_SB_FEAT_INCOMPAT_EXTENTS | EXT_SB_FEAT_INCOMPAT_64BIT \
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72 | | EXT_SB_FEAT_INCOMPAT_FLEX_BG)
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73 |
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74 |
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75 | /*********************************************************************************************************************************
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76 | * Structures and Typedefs *
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77 | *********************************************************************************************************************************/
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78 | /** Pointer to the ext filesystem data. */
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79 | typedef struct RTFSEXTVOL *PRTFSEXTVOL;
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80 |
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81 |
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82 | /**
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83 | * Cached block group descriptor data.
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84 | */
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85 | typedef struct RTFSEXTBLKGRP
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86 | {
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87 | /** AVL tree node, indexed by the block group number. */
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88 | AVLU32NODECORE Core;
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89 | /** List node for the LRU list used for eviction. */
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90 | RTLISTNODE NdLru;
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91 | /** Reference counter. */
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92 | volatile uint32_t cRefs;
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93 | /** Block number where the inode table is store. */
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94 | uint64_t iBlockInodeTbl;
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95 | /** Pointer to the inode bitmap. */
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96 | uint8_t *pabInodeBitmap;
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97 | /** Block bitmap - variable in size (depends on the block size
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98 | * and number of blocks per group). */
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99 | uint8_t abBlockBitmap[1];
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100 | } RTFSEXTBLKGRP;
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101 | /** Pointer to block group descriptor data. */
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102 | typedef RTFSEXTBLKGRP *PRTFSEXTBLKGRP;
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103 |
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104 |
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105 | /**
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106 | * In-memory inode.
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107 | */
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108 | typedef struct RTFSEXTINODE
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109 | {
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110 | /** AVL tree node, indexed by the inode number. */
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111 | AVLU32NODECORE Core;
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112 | /** List node for the inode LRU list used for eviction. */
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113 | RTLISTNODE NdLru;
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114 | /** Reference counter. */
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115 | volatile uint32_t cRefs;
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116 | /** Byte offset in the backing file where the inode is stored.. */
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117 | uint64_t offInode;
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118 | /** Inode data. */
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119 | RTFSOBJINFO ObjInfo;
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120 | /** Inode flags (copied from the on disk inode). */
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121 | uint32_t fFlags;
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122 | /** Copy of the block map/extent tree. */
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123 | uint32_t aiBlocks[EXT_INODE_BLOCK_ENTRIES];
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124 | } RTFSEXTINODE;
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125 | /** Pointer to an in-memory inode. */
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126 | typedef RTFSEXTINODE *PRTFSEXTINODE;
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127 |
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128 |
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129 | /**
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130 | * Block cache entry.
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131 | */
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132 | typedef struct RTFSEXTBLOCKENTRY
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133 | {
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134 | /** AVL tree node, indexed by the filesystem block number. */
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135 | AVLU64NODECORE Core;
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136 | /** List node for the inode LRU list used for eviction. */
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137 | RTLISTNODE NdLru;
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138 | /** Reference counter. */
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139 | volatile uint32_t cRefs;
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140 | /** The block data. */
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141 | uint8_t abData[1];
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142 | } RTFSEXTBLOCKENTRY;
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143 | /** Pointer to a block cache entry. */
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144 | typedef RTFSEXTBLOCKENTRY *PRTFSEXTBLOCKENTRY;
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145 |
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146 |
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147 | /**
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148 | * Open directory instance.
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149 | */
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150 | typedef struct RTFSEXTDIR
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151 | {
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152 | /** Volume this directory belongs to. */
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153 | PRTFSEXTVOL pVol;
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154 | /** The underlying inode structure. */
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155 | PRTFSEXTINODE pInode;
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156 | /** Set if we've reached the end of the directory enumeration. */
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157 | bool fNoMoreFiles;
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158 | /** Current offset into the directory where the next entry should be read. */
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159 | uint64_t offEntry;
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160 | /** Next entry index (for logging purposes). */
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161 | uint32_t idxEntry;
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162 | } RTFSEXTDIR;
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163 | /** Pointer to an open directory instance. */
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164 | typedef RTFSEXTDIR *PRTFSEXTDIR;
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165 |
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166 |
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167 | /**
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168 | * Open file instance.
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169 | */
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170 | typedef struct RTFSEXTFILE
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171 | {
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172 | /** Volume this directory belongs to. */
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173 | PRTFSEXTVOL pVol;
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174 | /** The underlying inode structure. */
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175 | PRTFSEXTINODE pInode;
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176 | /** Current offset into the file for I/O. */
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177 | RTFOFF offFile;
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178 | } RTFSEXTFILE;
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179 | /** Pointer to an open file instance. */
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180 | typedef RTFSEXTFILE *PRTFSEXTFILE;
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181 |
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182 |
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183 | /**
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184 | * Ext2/3/4 filesystem volume.
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185 | */
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186 | typedef struct RTFSEXTVOL
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187 | {
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188 | /** Handle to itself. */
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189 | RTVFS hVfsSelf;
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190 | /** The file, partition, or whatever backing the ext volume. */
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191 | RTVFSFILE hVfsBacking;
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192 | /** The size of the backing thingy. */
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193 | uint64_t cbBacking;
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194 |
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195 | /** RTVFSMNT_F_XXX. */
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196 | uint32_t fMntFlags;
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197 | /** RTFSEXTVFS_F_XXX (currently none defined). */
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198 | uint32_t fExtFlags;
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199 |
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200 | /** Flag whether the filesystem is 64bit. */
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201 | bool f64Bit;
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202 | /** Size of one block. */
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203 | size_t cbBlock;
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204 | /** Number of bits to shift left for fast conversion of block numbers to offsets. */
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205 | uint32_t cBlockShift;
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206 | /** Number of blocks in one group. */
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207 | uint32_t cBlocksPerGroup;
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208 | /** Number of inodes in each block group. */
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209 | uint32_t cInodesPerGroup;
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210 | /** Number of blocks groups in the volume. */
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211 | uint32_t cBlockGroups;
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212 | /** Size of the block bitmap. */
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213 | size_t cbBlockBitmap;
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214 | /** Size of the inode bitmap. */
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215 | size_t cbInodeBitmap;
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216 | /** Size of block group descriptor. */
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217 | size_t cbBlkGrpDesc;
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218 | /** Size of an inode. */
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219 | size_t cbInode;
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220 |
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221 | /** Incompatible features selected for this filesystem. */
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222 | uint32_t fFeaturesIncompat;
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223 |
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224 | /** @name Block group cache.
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225 | * @{ */
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226 | /** LRU list anchor. */
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227 | RTLISTANCHOR LstBlockGroupLru;
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228 | /** Root of the cached block group tree. */
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229 | AVLU32TREE BlockGroupRoot;
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230 | /** Size of the cached block groups. */
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231 | size_t cbBlockGroups;
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232 | /** @} */
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233 |
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234 | /** @name Inode cache.
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235 | * @{ */
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236 | /** LRU list anchor for the inode cache. */
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237 | RTLISTANCHOR LstInodeLru;
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238 | /** Root of the cached inode tree. */
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239 | AVLU32TREE InodeRoot;
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240 | /** Size of the cached inodes. */
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241 | size_t cbInodes;
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242 | /** @} */
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243 |
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244 | /** @name Block cache.
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245 | * @{ */
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246 | /** LRU list anchor for the block cache. */
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247 | RTLISTANCHOR LstBlockLru;
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248 | /** Root of the cached block tree. */
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249 | AVLU64TREE BlockRoot;
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250 | /** Size of cached blocks. */
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251 | size_t cbBlocks;
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252 | /** @} */
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253 | } RTFSEXTVOL;
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254 |
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255 |
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256 |
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257 | /*********************************************************************************************************************************
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258 | * Internal Functions *
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259 | *********************************************************************************************************************************/
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260 | static int rtFsExtVol_OpenDirByInode(PRTFSEXTVOL pThis, uint32_t iInode, PRTVFSDIR phVfsDir);
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261 |
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262 | #ifdef LOG_ENABLED
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263 | /**
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264 | * Logs the ext filesystem superblock.
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265 | *
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266 | * @returns nothing.
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267 | * @param pSb Pointer to the superblock.
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268 | */
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269 | static void rtFsExtSb_Log(PCEXTSUPERBLOCK pSb)
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270 | {
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271 | if (LogIs2Enabled())
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272 | {
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273 | RTTIMESPEC Spec;
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274 | char sz[80];
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275 |
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276 | Log2(("EXT: Superblock:\n"));
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277 | Log2(("EXT: cInodesTotal %RU32\n", RT_LE2H_U32(pSb->cInodesTotal)));
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278 | Log2(("EXT: cBlocksTotalLow %RU32\n", RT_LE2H_U32(pSb->cBlocksTotalLow)));
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279 | Log2(("EXT: cBlocksRsvdForSuperUserLow %RU32\n", RT_LE2H_U32(pSb->cBlocksRsvdForSuperUserLow)));
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280 | Log2(("EXT: cBlocksFreeLow %RU32\n", RT_LE2H_U32(pSb->cBlocksFreeLow)));
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281 | Log2(("EXT: cInodesFree %RU32\n", RT_LE2H_U32(pSb->cInodesFree)));
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282 | Log2(("EXT: iBlockOfSuperblock %RU32\n", RT_LE2H_U32(pSb->iBlockOfSuperblock)));
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283 | Log2(("EXT: cLogBlockSize %RU32\n", RT_LE2H_U32(pSb->cLogBlockSize)));
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284 | Log2(("EXT: cLogClusterSize %RU32\n", RT_LE2H_U32(pSb->cLogClusterSize)));
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285 | Log2(("EXT: cBlocksPerGroup %RU32\n", RT_LE2H_U32(pSb->cBlocksPerGroup)));
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286 | Log2(("EXT: cClustersPerBlockGroup %RU32\n", RT_LE2H_U32(pSb->cClustersPerBlockGroup)));
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287 | Log2(("EXT: cInodesPerBlockGroup %RU32\n", RT_LE2H_U32(pSb->cInodesPerBlockGroup)));
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288 | Log2(("EXT: u32LastMountTime %#RX32 %s\n", RT_LE2H_U32(pSb->u32LastMountTime),
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289 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pSb->u32LastMountTime)), sz, sizeof(sz))));
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290 | Log2(("EXT: u32LastWrittenTime %#RX32 %s\n", RT_LE2H_U32(pSb->u32LastWrittenTime),
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291 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pSb->u32LastWrittenTime)), sz, sizeof(sz))));
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292 | Log2(("EXT: cMountsSinceLastCheck %RU16\n", RT_LE2H_U32(pSb->cMountsSinceLastCheck)));
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293 | Log2(("EXT: cMaxMountsUntilCheck %RU16\n", RT_LE2H_U32(pSb->cMaxMountsUntilCheck)));
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294 | Log2(("EXT: u16Signature %#RX16\n", RT_LE2H_U32(pSb->u16Signature)));
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295 | Log2(("EXT: u16FilesystemState %#RX16\n", RT_LE2H_U32(pSb->u16FilesystemState)));
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296 | Log2(("EXT: u16ActionOnError %#RX16\n", RT_LE2H_U32(pSb->u16ActionOnError)));
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297 | Log2(("EXT: u16RevLvlMinor %#RX16\n", RT_LE2H_U32(pSb->u16RevLvlMinor)));
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298 | Log2(("EXT: u32LastCheckTime %#RX32 %s\n", RT_LE2H_U32(pSb->u32LastCheckTime),
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299 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pSb->u32LastCheckTime)), sz, sizeof(sz))));
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300 | Log2(("EXT: u32CheckInterval %RU32\n", RT_LE2H_U32(pSb->u32CheckInterval)));
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301 | Log2(("EXT: u32OsIdCreator %#RX32\n", RT_LE2H_U32(pSb->u32OsIdCreator)));
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302 | Log2(("EXT: u32RevLvl %#RX32\n", RT_LE2H_U32(pSb->u32RevLvl)));
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303 | Log2(("EXT: u16UidReservedBlocks %#RX16\n", RT_LE2H_U32(pSb->u16UidReservedBlocks)));
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304 | Log2(("EXT: u16GidReservedBlocks %#RX16\n", RT_LE2H_U32(pSb->u16GidReservedBlocks)));
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305 | if (RT_LE2H_U32(pSb->u32RevLvl) == EXT_SB_REV_V2_DYN_INODE_SZ)
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306 | {
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307 | Log2(("EXT: iFirstInodeNonRsvd %#RX32\n", RT_LE2H_U32(pSb->iFirstInodeNonRsvd)));
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308 | Log2(("EXT: cbInode %#RX16\n", RT_LE2H_U32(pSb->cbInode)));
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309 | Log2(("EXT: iBlkGrpSb %#RX16\n", RT_LE2H_U32(pSb->iBlkGrpSb)));
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310 | Log2(("EXT: fFeaturesCompat %#RX32%s%s%s%s%s%s%s%s%s%s\n", RT_LE2H_U32(pSb->fFeaturesCompat),
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311 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_DIR_PREALLOC ? " dir-prealloc" : "",
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312 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_IMAGIC_INODES ? " imagic-inode" : "",
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313 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_HAS_JOURNAL ? " has-journal" : "",
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314 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_EXT_ATTR ? " ext-attrs" : "",
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315 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_RESIZE_INODE ? " resize-inode" : "",
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316 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_DIR_INDEX ? " dir-index" : "",
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317 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_LAZY_BG ? " lazy-bg" : "",
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318 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_EXCLUDE_INODE ? " excl-inode" : "",
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319 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_EXCLUDE_BITMAP ? " excl-bitmap" : "",
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320 | RT_LE2H_U32(pSb->fFeaturesCompat) & EXT_SB_FEAT_COMPAT_SPARSE_SUPER2 ? " sparse-super2" : ""));
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321 | Log2(("EXT: fFeaturesIncompat %#RX32%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", RT_LE2H_U32(pSb->fFeaturesIncompat),
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322 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_COMPRESSION ? " compression" : "",
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323 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE ? " dir-filetype" : "",
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324 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_RECOVER ? " recovery" : "",
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325 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_JOURNAL_DEV ? " journal-dev" : "",
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326 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_META_BG ? " meta-bg" : "",
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327 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_EXTENTS ? " extents" : "",
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328 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_64BIT ? " 64bit" : "",
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329 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_MMP ? " mmp" : "",
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330 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_FLEX_BG ? " flex-bg" : "",
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331 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_EXT_ATTR_INODE ? " extattr-inode" : "",
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332 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_DIRDATA ? " dir-data" : "",
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333 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_CSUM_SEED ? " csum-seed" : "",
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334 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_LARGE_DIR ? " large-dir" : "",
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335 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_INLINE_DATA ? " inline-data" : "",
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336 | RT_LE2H_U32(pSb->fFeaturesIncompat) & EXT_SB_FEAT_INCOMPAT_ENCRYPT ? " encrypt" : ""));
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337 | Log2(("EXT: fFeaturesCompatRo %#RX32%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", RT_LE2H_U32(pSb->fFeaturesCompatRo),
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338 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_SPARSE_SUPER ? " sparse-super" : "",
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339 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_LARGE_FILE ? " large-file" : "",
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340 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_BTREE_DIR ? " btree-dir" : "",
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341 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_HUGE_FILE ? " huge-file" : "",
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342 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_GDT_CHSKUM ? " gdt-chksum" : "",
|
---|
343 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_DIR_NLINK ? " dir-nlink" : "",
|
---|
344 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_EXTRA_INODE_SZ ? " extra-inode" : "",
|
---|
345 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_HAS_SNAPSHOTS ? " snapshots" : "",
|
---|
346 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_QUOTA ? " quota" : "",
|
---|
347 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_BIGALLOC ? " big-alloc" : "",
|
---|
348 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_METADATA_CHKSUM ? " meta-chksum" : "",
|
---|
349 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_REPLICA ? " replica" : "",
|
---|
350 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_READONLY ? " ro" : "",
|
---|
351 | RT_LE2H_U32(pSb->fFeaturesCompatRo) & EXT_SB_FEAT_COMPAT_RO_PROJECT ? " project" : ""));
|
---|
352 | Log2(("EXT: au8Uuid <todo>\n"));
|
---|
353 | Log2(("EXT: achVolumeName %16s\n", &pSb->achVolumeName[0]));
|
---|
354 | Log2(("EXT: achLastMounted %64s\n", &pSb->achLastMounted[0]));
|
---|
355 | Log2(("EXT: u32AlgoUsageBitmap %#RX32\n", RT_LE2H_U32(pSb->u32AlgoUsageBitmap)));
|
---|
356 | Log2(("EXT: cBlocksPrealloc %RU8\n", pSb->cBlocksPrealloc));
|
---|
357 | Log2(("EXT: cBlocksPreallocDirectory %RU8\n", pSb->cBlocksPreallocDirectory));
|
---|
358 | Log2(("EXT: cGdtEntriesRsvd %RU16\n", pSb->cGdtEntriesRsvd));
|
---|
359 | Log2(("EXT: au8JournalUuid <todo>\n"));
|
---|
360 | Log2(("EXT: iJournalInode %#RX32\n", RT_LE2H_U32(pSb->iJournalInode)));
|
---|
361 | Log2(("EXT: u32JournalDev %#RX32\n", RT_LE2H_U32(pSb->u32JournalDev)));
|
---|
362 | Log2(("EXT: u32LastOrphan %#RX32\n", RT_LE2H_U32(pSb->u32LastOrphan)));
|
---|
363 | Log2(("EXT: au32HashSeedHtree[0] %#RX32\n", RT_LE2H_U32(pSb->au32HashSeedHtree[0])));
|
---|
364 | Log2(("EXT: au32HashSeedHtree[1] %#RX32\n", RT_LE2H_U32(pSb->au32HashSeedHtree[1])));
|
---|
365 | Log2(("EXT: au32HashSeedHtree[2] %#RX32\n", RT_LE2H_U32(pSb->au32HashSeedHtree[2])));
|
---|
366 | Log2(("EXT: au32HashSeedHtree[3] %#RX32\n", RT_LE2H_U32(pSb->au32HashSeedHtree[3])));
|
---|
367 | Log2(("EXT: u8HashVersionDef %#RX8\n", pSb->u8HashVersionDef));
|
---|
368 | Log2(("EXT: u8JnlBackupType %#RX8\n", pSb->u8JnlBackupType));
|
---|
369 | Log2(("EXT: cbGroupDesc %RU16\n", RT_LE2H_U16(pSb->cbGroupDesc)));
|
---|
370 | Log2(("EXT: fMntOptsDef %#RX32\n", RT_LE2H_U32(pSb->fMntOptsDef)));
|
---|
371 | Log2(("EXT: iFirstMetaBg %#RX32\n", RT_LE2H_U32(pSb->iFirstMetaBg)));
|
---|
372 | Log2(("EXT: u32TimeFsCreation %#RX32 %s\n", RT_LE2H_U32(pSb->u32TimeFsCreation),
|
---|
373 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pSb->u32TimeFsCreation)), sz, sizeof(sz))));
|
---|
374 | for (unsigned i = 0; i < RT_ELEMENTS(pSb->au32JnlBlocks); i++)
|
---|
375 | Log2(("EXT: au32JnlBlocks[%u] %#RX32\n", i, RT_LE2H_U32(pSb->au32JnlBlocks[i])));
|
---|
376 | Log2(("EXT: cBlocksTotalHigh %#RX32\n", RT_LE2H_U32(pSb->cBlocksTotalHigh)));
|
---|
377 | Log2(("EXT: cBlocksRsvdForSuperUserHigh %#RX32\n", RT_LE2H_U32(pSb->cBlocksRsvdForSuperUserHigh)));
|
---|
378 | Log2(("EXT: cBlocksFreeHigh %#RX32\n", RT_LE2H_U32(pSb->cBlocksFreeHigh)));
|
---|
379 | Log2(("EXT: cbInodesExtraMin %#RX16\n", RT_LE2H_U16(pSb->cbInodesExtraMin)));
|
---|
380 | Log2(("EXT: cbNewInodesRsv %#RX16\n", RT_LE2H_U16(pSb->cbInodesExtraMin)));
|
---|
381 | Log2(("EXT: fFlags %#RX32\n", RT_LE2H_U32(pSb->fFlags)));
|
---|
382 | Log2(("EXT: cRaidStride %RU16\n", RT_LE2H_U16(pSb->cRaidStride)));
|
---|
383 | Log2(("EXT: cSecMmpInterval %RU16\n", RT_LE2H_U16(pSb->cSecMmpInterval)));
|
---|
384 | Log2(("EXT: iMmpBlock %#RX64\n", RT_LE2H_U64(pSb->iMmpBlock)));
|
---|
385 | Log2(("EXT: cRaidStrideWidth %#RX32\n", RT_LE2H_U32(pSb->cRaidStrideWidth)));
|
---|
386 | Log2(("EXT: cLogGroupsPerFlex %RU8\n", pSb->cLogGroupsPerFlex));
|
---|
387 | Log2(("EXT: u8ChksumType %RX8\n", pSb->u8ChksumType));
|
---|
388 | Log2(("EXT: cKbWritten %#RX64\n", RT_LE2H_U64(pSb->cKbWritten)));
|
---|
389 | Log2(("EXT: iSnapshotInode %#RX32\n", RT_LE2H_U32(pSb->iSnapshotInode)));
|
---|
390 | Log2(("EXT: iSnapshotId %#RX32\n", RT_LE2H_U32(pSb->iSnapshotId)));
|
---|
391 | Log2(("EXT: cSnapshotRsvdBlocks %#RX64\n", RT_LE2H_U64(pSb->cSnapshotRsvdBlocks)));
|
---|
392 | Log2(("EXT: iSnapshotListInode %#RX32\n", RT_LE2H_U32(pSb->iSnapshotListInode)));
|
---|
393 | Log2(("EXT: cErrorsSeen %#RX32\n", RT_LE2H_U32(pSb->cErrorsSeen)));
|
---|
394 | Log2(("EXT: [...]\n")); /** @todo Missing fields if becoming interesting. */
|
---|
395 | Log2(("EXT: iInodeLostFound %#RX32\n", RT_LE2H_U32(pSb->iInodeLostFound)));
|
---|
396 | Log2(("EXT: iInodeProjQuota %#RX32\n", RT_LE2H_U32(pSb->iInodeProjQuota)));
|
---|
397 | Log2(("EXT: u32ChksumSeed %#RX32\n", RT_LE2H_U32(pSb->u32ChksumSeed)));
|
---|
398 | Log2(("EXT: [...]\n")); /** @todo Missing fields if becoming interesting. */
|
---|
399 | Log2(("EXT: u32Chksum %#RX32\n", RT_LE2H_U32(pSb->u32Chksum)));
|
---|
400 | }
|
---|
401 | }
|
---|
402 | }
|
---|
403 |
|
---|
404 |
|
---|
405 | /**
|
---|
406 | * Logs a ext filesystem block group descriptor.
|
---|
407 | *
|
---|
408 | * @returns nothing.
|
---|
409 | * @param pThis The ext volume instance.
|
---|
410 | * @param iBlockGroup Block group number.
|
---|
411 | * @param pBlockGroup Pointer to the block group.
|
---|
412 | */
|
---|
413 | static void rtFsExtBlockGroup_Log(PRTFSEXTVOL pThis, uint32_t iBlockGroup, PCEXTBLOCKGROUPDESC pBlockGroup)
|
---|
414 | {
|
---|
415 | if (LogIs2Enabled())
|
---|
416 | {
|
---|
417 | uint64_t iBlockStart = (uint64_t)iBlockGroup * pThis->cBlocksPerGroup;
|
---|
418 | Log2(("EXT: Block group %#RX32 (blocks %#RX64 to %#RX64):\n",
|
---|
419 | iBlockGroup, iBlockStart, iBlockStart + pThis->cBlocksPerGroup - 1));
|
---|
420 | Log2(("EXT: offBlockBitmapLow %#RX32\n", RT_LE2H_U32(pBlockGroup->v32.offBlockBitmapLow)));
|
---|
421 | Log2(("EXT: offInodeBitmapLow %#RX32\n", RT_LE2H_U32(pBlockGroup->v32.offInodeBitmapLow)));
|
---|
422 | Log2(("EXT: offInodeTableLow %#RX32\n", RT_LE2H_U32(pBlockGroup->v32.offInodeTableLow)));
|
---|
423 | Log2(("EXT: cBlocksFreeLow %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.cBlocksFreeLow)));
|
---|
424 | Log2(("EXT: cInodesFreeLow %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.cInodesFreeLow)));
|
---|
425 | Log2(("EXT: cDirectoriesLow %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.cDirectoriesLow)));
|
---|
426 | Log2(("EXT: fFlags %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.fFlags)));
|
---|
427 | Log2(("EXT: offSnapshotExclBitmapLow %#RX32\n", RT_LE2H_U32(pBlockGroup->v32.offSnapshotExclBitmapLow)));
|
---|
428 | Log2(("EXT: u16ChksumBlockBitmapLow %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.u16ChksumBlockBitmapLow)));
|
---|
429 | Log2(("EXT: u16ChksumInodeBitmapLow %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.u16ChksumInodeBitmapLow)));
|
---|
430 | Log2(("EXT: cInodeTblUnusedLow %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.cInodeTblUnusedLow)));
|
---|
431 | Log2(("EXT: u16Chksum %#RX16\n", RT_LE2H_U16(pBlockGroup->v32.u16Chksum)));
|
---|
432 | if (pThis->cbBlkGrpDesc == sizeof(EXTBLOCKGROUPDESC64))
|
---|
433 | {
|
---|
434 | Log2(("EXT: offBlockBitmapHigh %#RX32\n", RT_LE2H_U32(pBlockGroup->v64.offBlockBitmapHigh)));
|
---|
435 | Log2(("EXT: offInodeBitmapHigh %#RX32\n", RT_LE2H_U32(pBlockGroup->v64.offInodeBitmapHigh)));
|
---|
436 | Log2(("EXT: offInodeTableHigh %#RX32\n", RT_LE2H_U32(pBlockGroup->v64.offInodeTableHigh)));
|
---|
437 | Log2(("EXT: cBlocksFreeHigh %#RX16\n", RT_LE2H_U16(pBlockGroup->v64.cBlocksFreeHigh)));
|
---|
438 | Log2(("EXT: cInodesFreeHigh %#RX16\n", RT_LE2H_U16(pBlockGroup->v64.cInodesFreeHigh)));
|
---|
439 | Log2(("EXT: cDirectoriesHigh %#RX16\n", RT_LE2H_U16(pBlockGroup->v64.cDirectoriesHigh)));
|
---|
440 | Log2(("EXT: cInodeTblUnusedHigh %#RX16\n", RT_LE2H_U16(pBlockGroup->v64.cInodeTblUnusedHigh)));
|
---|
441 | Log2(("EXT: offSnapshotExclBitmapHigh %#RX32\n", RT_LE2H_U32(pBlockGroup->v64.offSnapshotExclBitmapHigh)));
|
---|
442 | Log2(("EXT: u16ChksumBlockBitmapHigh %#RX16\n", RT_LE2H_U16(pBlockGroup->v64.u16ChksumBlockBitmapHigh)));
|
---|
443 | Log2(("EXT: u16ChksumInodeBitmapHigh %#RX16\n", RT_LE2H_U16(pBlockGroup->v64.u16ChksumInodeBitmapHigh)));
|
---|
444 | }
|
---|
445 | }
|
---|
446 | }
|
---|
447 |
|
---|
448 |
|
---|
449 | /**
|
---|
450 | * Logs a ext filesystem inode.
|
---|
451 | *
|
---|
452 | * @returns nothing.
|
---|
453 | * @param pThis The ext volume instance.
|
---|
454 | * @param iInode Inode number.
|
---|
455 | * @param pInode Pointer to the inode.
|
---|
456 | */
|
---|
457 | static void rtFsExtInode_Log(PRTFSEXTVOL pThis, uint32_t iInode, PCEXTINODECOMB pInode)
|
---|
458 | {
|
---|
459 | if (LogIs2Enabled())
|
---|
460 | {
|
---|
461 | RTTIMESPEC Spec;
|
---|
462 | char sz[80];
|
---|
463 |
|
---|
464 | Log2(("EXT: Inode %#RX32:\n", iInode));
|
---|
465 | Log2(("EXT: fMode %#RX16\n", RT_LE2H_U16(pInode->Core.fMode)));
|
---|
466 | Log2(("EXT: uUidLow %#RX16\n", RT_LE2H_U16(pInode->Core.uUidLow)));
|
---|
467 | Log2(("EXT: cbSizeLow %#RX32\n", RT_LE2H_U32(pInode->Core.cbSizeLow)));
|
---|
468 | Log2(("EXT: u32TimeLastAccess %#RX32 %s\n", RT_LE2H_U32(pInode->Core.u32TimeLastAccess),
|
---|
469 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pInode->Core.u32TimeLastAccess)), sz, sizeof(sz))));
|
---|
470 | Log2(("EXT: u32TimeLastChange %#RX32 %s\n", RT_LE2H_U32(pInode->Core.u32TimeLastChange),
|
---|
471 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pInode->Core.u32TimeLastChange)), sz, sizeof(sz))));
|
---|
472 | Log2(("EXT: u32TimeLastModification %#RX32 %s\n", RT_LE2H_U32(pInode->Core.u32TimeLastModification),
|
---|
473 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pInode->Core.u32TimeLastModification)), sz, sizeof(sz))));
|
---|
474 | Log2(("EXT: u32TimeDeletion %#RX32 %s\n", RT_LE2H_U32(pInode->Core.u32TimeDeletion),
|
---|
475 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pInode->Core.u32TimeDeletion)), sz, sizeof(sz))));
|
---|
476 | Log2(("EXT: uGidLow %#RX16\n", RT_LE2H_U16(pInode->Core.uGidLow)));
|
---|
477 | Log2(("EXT: cHardLinks %#RU16\n", RT_LE2H_U16(pInode->Core.cHardLinks)));
|
---|
478 | Log2(("EXT: cBlocksLow %#RX32\n", RT_LE2H_U32(pInode->Core.cBlocksLow)));
|
---|
479 | Log2(("EXT: fFlags %#RX32\n", RT_LE2H_U32(pInode->Core.fFlags)));
|
---|
480 | Log2(("EXT: Osd1.u32LnxVersion %#RX32\n", RT_LE2H_U32(pInode->Core.Osd1.u32LnxVersion)));
|
---|
481 | for (unsigned i = 0; i < RT_ELEMENTS(pInode->Core.au32Block); i++)
|
---|
482 | Log2(("EXT: au32Block[%u] %#RX32\n", i, RT_LE2H_U32(pInode->Core.au32Block[i])));
|
---|
483 | Log2(("EXT: u32Version %#RX32\n", RT_LE2H_U32(pInode->Core.u32Version)));
|
---|
484 | Log2(("EXT: offExtAttrLow %#RX32\n", RT_LE2H_U32(pInode->Core.offExtAttrLow)));
|
---|
485 | Log2(("EXT: cbSizeHigh %#RX32\n", RT_LE2H_U32(pInode->Core.cbSizeHigh)));
|
---|
486 | Log2(("EXT: u32FragmentAddrObs %#RX32\n", RT_LE2H_U32(pInode->Core.u32FragmentAddrObs)));
|
---|
487 | Log2(("EXT: Osd2.Lnx.cBlocksHigh %#RX32\n", RT_LE2H_U32(pInode->Core.Osd2.Lnx.cBlocksHigh)));
|
---|
488 | Log2(("EXT: Osd2.Lnx.offExtAttrHigh %#RX32\n", RT_LE2H_U32(pInode->Core.Osd2.Lnx.offExtAttrHigh)));
|
---|
489 | Log2(("EXT: Osd2.Lnx.uUidHigh %#RX16\n", RT_LE2H_U16(pInode->Core.Osd2.Lnx.uUidHigh)));
|
---|
490 | Log2(("EXT: Osd2.Lnx.uGidHigh %#RX16\n", RT_LE2H_U16(pInode->Core.Osd2.Lnx.uGidHigh)));
|
---|
491 | Log2(("EXT: Osd2.Lnx.u16ChksumLow %#RX16\n", RT_LE2H_U16(pInode->Core.Osd2.Lnx.u16ChksumLow)));
|
---|
492 |
|
---|
493 | if (pThis->cbInode >= sizeof(EXTINODECOMB))
|
---|
494 | {
|
---|
495 | Log2(("EXT: cbInodeExtra %#RU16\n", RT_LE2H_U16(pInode->Extra.cbInodeExtra)));
|
---|
496 | Log2(("EXT: u16ChksumHigh %#RX16\n", RT_LE2H_U16(pInode->Extra.u16ChksumHigh)));
|
---|
497 | Log2(("EXT: u32ExtraTimeLastChange %#RX32\n", RT_LE2H_U16(pInode->Extra.u32ExtraTimeLastChange)));
|
---|
498 | Log2(("EXT: u32ExtraTimeLastModification %#RX32\n", RT_LE2H_U16(pInode->Extra.u32ExtraTimeLastModification)));
|
---|
499 | Log2(("EXT: u32ExtraTimeLastAccess %#RX32\n", RT_LE2H_U16(pInode->Extra.u32ExtraTimeLastAccess)));
|
---|
500 | Log2(("EXT: u32TimeCreation %#RX32 %s\n", RT_LE2H_U32(pInode->Extra.u32TimeCreation),
|
---|
501 | RTTimeSpecToString(RTTimeSpecSetSeconds(&Spec, RT_LE2H_U32(pInode->Extra.u32TimeCreation)), sz, sizeof(sz))));
|
---|
502 | Log2(("EXT: u32ExtraTimeCreation %#RX32\n", RT_LE2H_U16(pInode->Extra.u32ExtraTimeCreation)));
|
---|
503 | Log2(("EXT: u32VersionHigh %#RX32\n", RT_LE2H_U16(pInode->Extra.u32VersionHigh)));
|
---|
504 | Log2(("EXT: u32ProjectId %#RX32\n", RT_LE2H_U16(pInode->Extra.u32ProjectId)));
|
---|
505 | }
|
---|
506 | }
|
---|
507 | }
|
---|
508 |
|
---|
509 |
|
---|
510 | /**
|
---|
511 | * Logs a ext filesystem directory entry.
|
---|
512 | *
|
---|
513 | * @returns nothing.
|
---|
514 | * @param pThis The ext volume instance.
|
---|
515 | * @param idxDirEntry Directory entry index number.
|
---|
516 | * @param pDirEntry The directory entry.
|
---|
517 | */
|
---|
518 | static void rtFsExtDirEntry_Log(PRTFSEXTVOL pThis, uint32_t idxDirEntry, PCEXTDIRENTRYEX pDirEntry)
|
---|
519 | {
|
---|
520 | if (LogIs2Enabled())
|
---|
521 | {
|
---|
522 | int cbName = 0;
|
---|
523 |
|
---|
524 | Log2(("EXT: Directory entry %#RX32:\n", idxDirEntry));
|
---|
525 | Log2(("EXT: iInodeRef %#RX32\n", RT_LE2H_U32(pDirEntry->Core.iInodeRef)));
|
---|
526 | Log2(("EXT: cbRecord %#RX32\n", RT_LE2H_U32(pDirEntry->Core.cbRecord)));
|
---|
527 | if (pThis->fFeaturesIncompat & EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE)
|
---|
528 | {
|
---|
529 | Log2(("EXT: cbName %#RU8\n", pDirEntry->Core.u.v2.cbName));
|
---|
530 | Log2(("EXT: uType %#RX8\n", pDirEntry->Core.u.v2.uType));
|
---|
531 | cbName = pDirEntry->Core.u.v2.cbName;
|
---|
532 | }
|
---|
533 | else
|
---|
534 | {
|
---|
535 | Log2(("EXT: cbName %#RU16\n", RT_LE2H_U16(pDirEntry->Core.u.v1.cbName)));
|
---|
536 | cbName = RT_LE2H_U16(pDirEntry->Core.u.v1.cbName);
|
---|
537 | }
|
---|
538 | Log2(("EXT: achName %*s\n", cbName, &pDirEntry->Core.achName[0]));
|
---|
539 | }
|
---|
540 | }
|
---|
541 |
|
---|
542 |
|
---|
543 | /**
|
---|
544 | * Logs an extent header.
|
---|
545 | *
|
---|
546 | * @returns nothing.
|
---|
547 | * @param pExtentHdr The extent header node.
|
---|
548 | */
|
---|
549 | static void rtFsExtExtentHdr_Log(PCEXTEXTENTHDR pExtentHdr)
|
---|
550 | {
|
---|
551 | if (LogIs2Enabled())
|
---|
552 | {
|
---|
553 | Log2(("EXT: Extent header:\n"));
|
---|
554 | Log2(("EXT: u16Magic %#RX16\n", RT_LE2H_U32(pExtentHdr->u16Magic)));
|
---|
555 | Log2(("EXT: cEntries %#RX16\n", RT_LE2H_U32(pExtentHdr->cEntries)));
|
---|
556 | Log2(("EXT: cMax %#RX16\n", RT_LE2H_U32(pExtentHdr->cMax)));
|
---|
557 | Log2(("EXT: uDepth %#RX16\n", RT_LE2H_U32(pExtentHdr->uDepth)));
|
---|
558 | Log2(("EXT: cGeneration %#RX32\n", RT_LE2H_U32(pExtentHdr->cGeneration)));
|
---|
559 | }
|
---|
560 | }
|
---|
561 |
|
---|
562 |
|
---|
563 | /**
|
---|
564 | * Logs an extent index node.
|
---|
565 | *
|
---|
566 | * @returns nothing.
|
---|
567 | * @param pExtentIdx The extent index node.
|
---|
568 | */
|
---|
569 | static void rtFsExtExtentIdx_Log(PCEXTEXTENTIDX pExtentIdx)
|
---|
570 | {
|
---|
571 | if (LogIs2Enabled())
|
---|
572 | {
|
---|
573 | Log2(("EXT: Extent index node:\n"));
|
---|
574 | Log2(("EXT: iBlock %#RX32\n", RT_LE2H_U32(pExtentIdx->iBlock)));
|
---|
575 | Log2(("EXT: offChildLow %#RX32\n", RT_LE2H_U32(pExtentIdx->offChildLow)));
|
---|
576 | Log2(("EXT: offChildHigh %#RX16\n", RT_LE2H_U16(pExtentIdx->offChildHigh)));
|
---|
577 | }
|
---|
578 | }
|
---|
579 |
|
---|
580 |
|
---|
581 | /**
|
---|
582 | * Logs an extent.
|
---|
583 | *
|
---|
584 | * @returns nothing.
|
---|
585 | * @param pExtent The extent.
|
---|
586 | */
|
---|
587 | static void rtFsExtExtent_Log(PCEXTEXTENT pExtent)
|
---|
588 | {
|
---|
589 | if (LogIs2Enabled())
|
---|
590 | {
|
---|
591 | Log2(("EXT: Extent:\n"));
|
---|
592 | Log2(("EXT: iBlock %#RX32\n", RT_LE2H_U32(pExtent->iBlock)));
|
---|
593 | Log2(("EXT: cBlocks %#RX16\n", RT_LE2H_U16(pExtent->cBlocks)));
|
---|
594 | Log2(("EXT: offStartHigh %#RX16\n", RT_LE2H_U32(pExtent->offStartHigh)));
|
---|
595 | Log2(("EXT: offStartLow %#RX16\n", RT_LE2H_U16(pExtent->offStartLow)));
|
---|
596 | }
|
---|
597 | }
|
---|
598 | #endif
|
---|
599 |
|
---|
600 |
|
---|
601 | /**
|
---|
602 | * Converts a block number to a byte offset.
|
---|
603 | *
|
---|
604 | * @returns Offset in bytes for the given block number.
|
---|
605 | * @param pThis The ext volume instance.
|
---|
606 | * @param iBlock The block number to convert.
|
---|
607 | */
|
---|
608 | DECLINLINE(uint64_t) rtFsExtBlockIdxToDiskOffset(PRTFSEXTVOL pThis, uint64_t iBlock)
|
---|
609 | {
|
---|
610 | return iBlock << pThis->cBlockShift;
|
---|
611 | }
|
---|
612 |
|
---|
613 |
|
---|
614 | /**
|
---|
615 | * Converts a byte offset to a block number.
|
---|
616 | *
|
---|
617 | * @returns Block number.
|
---|
618 | * @param pThis The ext volume instance.
|
---|
619 | * @param iBlock The offset to convert.
|
---|
620 | */
|
---|
621 | DECLINLINE(uint64_t) rtFsExtDiskOffsetToBlockIdx(PRTFSEXTVOL pThis, uint64_t off)
|
---|
622 | {
|
---|
623 | return off >> pThis->cBlockShift;
|
---|
624 | }
|
---|
625 |
|
---|
626 |
|
---|
627 | /**
|
---|
628 | * Creates the proper block number from the given low and high parts in case a 64bit
|
---|
629 | * filesystem is used.
|
---|
630 | *
|
---|
631 | * @returns 64bit block number.
|
---|
632 | * @param pThis The ext volume instance.
|
---|
633 | * @param uLow The lower 32bit part.
|
---|
634 | * @param uHigh The upper 32bit part.
|
---|
635 | */
|
---|
636 | DECLINLINE(uint64_t) rtFsExtBlockFromLowHigh(PRTFSEXTVOL pThis, uint32_t uLow, uint32_t uHigh)
|
---|
637 | {
|
---|
638 | return pThis->f64Bit ? RT_MAKE_U64(uLow, uHigh): uLow;
|
---|
639 | }
|
---|
640 |
|
---|
641 |
|
---|
642 | /**
|
---|
643 | * Converts the given high and low parts of the block number to a byte offset.
|
---|
644 | *
|
---|
645 | * @returns Offset in bytes for the given block number.
|
---|
646 | * @param uLow The lower 32bit part of the block number.
|
---|
647 | * @param uHigh The upper 32bit part of the block number.
|
---|
648 | */
|
---|
649 | DECLINLINE(uint64_t) rtFsExtBlockIdxLowHighToDiskOffset(PRTFSEXTVOL pThis, uint32_t uLow, uint32_t uHigh)
|
---|
650 | {
|
---|
651 | uint64_t iBlock = rtFsExtBlockFromLowHigh(pThis, uLow, uHigh);
|
---|
652 | return rtFsExtBlockIdxToDiskOffset(pThis, iBlock);
|
---|
653 | }
|
---|
654 |
|
---|
655 |
|
---|
656 | /**
|
---|
657 | * Allocates a new block group.
|
---|
658 | *
|
---|
659 | * @returns Pointer to the new block group descriptor or NULL if out of memory.
|
---|
660 | * @param pThis The ext volume instance.
|
---|
661 | * @param cbAlloc How much to allocate.
|
---|
662 | * @param iBlockGroup Block group number.
|
---|
663 | */
|
---|
664 | static PRTFSEXTBLOCKENTRY rtFsExtVol_BlockAlloc(PRTFSEXTVOL pThis, size_t cbAlloc, uint64_t iBlock)
|
---|
665 | {
|
---|
666 | PRTFSEXTBLOCKENTRY pBlock = (PRTFSEXTBLOCKENTRY)RTMemAllocZ(cbAlloc);
|
---|
667 | if (RT_LIKELY(pBlock))
|
---|
668 | {
|
---|
669 | pBlock->Core.Key = iBlock;
|
---|
670 | pBlock->cRefs = 0;
|
---|
671 | pThis->cbBlocks += cbAlloc;
|
---|
672 | }
|
---|
673 |
|
---|
674 | return pBlock;
|
---|
675 | }
|
---|
676 |
|
---|
677 |
|
---|
678 | /**
|
---|
679 | * Returns a new block entry utilizing the cache if possible.
|
---|
680 | *
|
---|
681 | * @returns Pointer to the new block entry or NULL if out of memory.
|
---|
682 | * @param pThis The ext volume instance.
|
---|
683 | * @param iBlock Block number.
|
---|
684 | */
|
---|
685 | static PRTFSEXTBLOCKENTRY rtFsExtVol_BlockGetNew(PRTFSEXTVOL pThis, uint64_t iBlock)
|
---|
686 | {
|
---|
687 | PRTFSEXTBLOCKENTRY pBlock = NULL;
|
---|
688 | size_t cbAlloc = RT_UOFFSETOF_DYN(RTFSEXTBLOCKENTRY, abData[pThis->cbBlock]);
|
---|
689 | if (pThis->cbBlocks + cbAlloc <= RTFSEXT_MAX_BLOCK_CACHE_SIZE)
|
---|
690 | pBlock = rtFsExtVol_BlockAlloc(pThis, cbAlloc, iBlock);
|
---|
691 | else
|
---|
692 | {
|
---|
693 | pBlock = RTListRemoveLast(&pThis->LstBlockLru, RTFSEXTBLOCKENTRY, NdLru);
|
---|
694 | if (!pBlock)
|
---|
695 | pBlock = rtFsExtVol_BlockAlloc(pThis, cbAlloc, iBlock);
|
---|
696 | else
|
---|
697 | {
|
---|
698 | /* Remove the block group from the tree because it gets a new key. */
|
---|
699 | PAVLU64NODECORE pCore = RTAvlU64Remove(&pThis->BlockRoot, pBlock->Core.Key);
|
---|
700 | Assert(pCore == &pBlock->Core); RT_NOREF(pCore);
|
---|
701 | }
|
---|
702 | }
|
---|
703 |
|
---|
704 | Assert(!pBlock->cRefs);
|
---|
705 | pBlock->Core.Key = iBlock;
|
---|
706 | pBlock->cRefs = 1;
|
---|
707 |
|
---|
708 | return pBlock;
|
---|
709 | }
|
---|
710 |
|
---|
711 |
|
---|
712 | /**
|
---|
713 | * Frees the given block.
|
---|
714 | *
|
---|
715 | * @returns nothing.
|
---|
716 | * @param pThis The ext volume instance.
|
---|
717 | * @param pBlock The block to free.
|
---|
718 | */
|
---|
719 | static void rtFsExtVol_BlockFree(PRTFSEXTVOL pThis, PRTFSEXTBLOCKENTRY pBlock)
|
---|
720 | {
|
---|
721 | Assert(!pBlock->cRefs);
|
---|
722 |
|
---|
723 | /*
|
---|
724 | * Put it into the cache if the limit wasn't exceeded, otherwise the block group
|
---|
725 | * is freed right away.
|
---|
726 | */
|
---|
727 | if (pThis->cbBlocks <= RTFSEXT_MAX_BLOCK_CACHE_SIZE)
|
---|
728 | {
|
---|
729 | /* Put onto the LRU list. */
|
---|
730 | RTListPrepend(&pThis->LstBlockLru, &pBlock->NdLru);
|
---|
731 | }
|
---|
732 | else
|
---|
733 | {
|
---|
734 | /* Remove from the tree and free memory. */
|
---|
735 | PAVLU64NODECORE pCore = RTAvlU64Remove(&pThis->BlockRoot, pBlock->Core.Key);
|
---|
736 | Assert(pCore == &pBlock->Core); RT_NOREF(pCore);
|
---|
737 | RTMemFree(pBlock);
|
---|
738 | pThis->cbBlocks -= RT_UOFFSETOF_DYN(RTFSEXTBLOCKENTRY, abData[pThis->cbBlock]);
|
---|
739 | }
|
---|
740 | }
|
---|
741 |
|
---|
742 |
|
---|
743 | /**
|
---|
744 | * Gets the specified block data from the volume.
|
---|
745 | *
|
---|
746 | * @returns IPRT status code.
|
---|
747 | * @param pThis The ext volume instance.
|
---|
748 | * @param iBlock The filesystem block to load.
|
---|
749 | * @param ppBlock Where to return the pointer to the block entry on success.
|
---|
750 | * @param ppvData Where to return the pointer to the block data on success.
|
---|
751 | */
|
---|
752 | static int rtFsExtVol_BlockLoad(PRTFSEXTVOL pThis, uint64_t iBlock, PRTFSEXTBLOCKENTRY *ppBlock, void **ppvData)
|
---|
753 | {
|
---|
754 | int rc = VINF_SUCCESS;
|
---|
755 |
|
---|
756 | /* Try to fetch the block group from the cache first. */
|
---|
757 | PRTFSEXTBLOCKENTRY pBlock = (PRTFSEXTBLOCKENTRY)RTAvlU64Get(&pThis->BlockRoot, iBlock);
|
---|
758 | if (!pBlock)
|
---|
759 | {
|
---|
760 | /* Slow path, load from disk. */
|
---|
761 | pBlock = rtFsExtVol_BlockGetNew(pThis, iBlock);
|
---|
762 | if (RT_LIKELY(pBlock))
|
---|
763 | {
|
---|
764 | uint64_t offRead = rtFsExtBlockIdxToDiskOffset(pThis, iBlock);
|
---|
765 | rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &pBlock->abData[0], pThis->cbBlock, NULL);
|
---|
766 | if (RT_SUCCESS(rc))
|
---|
767 | {
|
---|
768 | bool fIns = RTAvlU64Insert(&pThis->BlockRoot, &pBlock->Core);
|
---|
769 | Assert(fIns); RT_NOREF(fIns);
|
---|
770 | }
|
---|
771 | }
|
---|
772 | else
|
---|
773 | rc = VERR_NO_MEMORY;
|
---|
774 | }
|
---|
775 | else
|
---|
776 | {
|
---|
777 | /* Remove from current LRU list position and add to the beginning. */
|
---|
778 | uint32_t cRefs = ASMAtomicIncU32(&pBlock->cRefs);
|
---|
779 | if (cRefs == 1) /* Blocks get removed from the LRU list if they are referenced. */
|
---|
780 | RTListNodeRemove(&pBlock->NdLru);
|
---|
781 | }
|
---|
782 |
|
---|
783 | if (RT_SUCCESS(rc))
|
---|
784 | {
|
---|
785 | *ppBlock = pBlock;
|
---|
786 | *ppvData = &pBlock->abData[0];
|
---|
787 | }
|
---|
788 | else if (pBlock)
|
---|
789 | {
|
---|
790 | ASMAtomicDecU32(&pBlock->cRefs);
|
---|
791 | rtFsExtVol_BlockFree(pThis, pBlock); /* Free the block. */
|
---|
792 | }
|
---|
793 |
|
---|
794 | return rc;
|
---|
795 | }
|
---|
796 |
|
---|
797 |
|
---|
798 | /**
|
---|
799 | * Releases a reference of the given block.
|
---|
800 | *
|
---|
801 | * @returns nothing.
|
---|
802 | * @param pThis The ext volume instance.
|
---|
803 | * @param pBlock The block to release.
|
---|
804 | */
|
---|
805 | static void rtFsExtVol_BlockRelease(PRTFSEXTVOL pThis, PRTFSEXTBLOCKENTRY pBlock)
|
---|
806 | {
|
---|
807 | uint32_t cRefs = ASMAtomicDecU32(&pBlock->cRefs);
|
---|
808 | if (!cRefs)
|
---|
809 | rtFsExtVol_BlockFree(pThis, pBlock);
|
---|
810 | }
|
---|
811 |
|
---|
812 |
|
---|
813 | /**
|
---|
814 | * Allocates a new block group.
|
---|
815 | *
|
---|
816 | * @returns Pointer to the new block group descriptor or NULL if out of memory.
|
---|
817 | * @param pThis The ext volume instance.
|
---|
818 | * @param cbAlloc How much to allocate.
|
---|
819 | * @param iBlockGroup Block group number.
|
---|
820 | */
|
---|
821 | static PRTFSEXTBLKGRP rtFsExtBlockGroupAlloc(PRTFSEXTVOL pThis, size_t cbAlloc, uint32_t iBlockGroup)
|
---|
822 | {
|
---|
823 | PRTFSEXTBLKGRP pBlockGroup = (PRTFSEXTBLKGRP)RTMemAllocZ(cbAlloc);
|
---|
824 | if (RT_LIKELY(pBlockGroup))
|
---|
825 | {
|
---|
826 | pBlockGroup->Core.Key = iBlockGroup;
|
---|
827 | pBlockGroup->cRefs = 0;
|
---|
828 | pBlockGroup->pabInodeBitmap = &pBlockGroup->abBlockBitmap[pThis->cbBlockBitmap];
|
---|
829 | pThis->cbBlockGroups += cbAlloc;
|
---|
830 | }
|
---|
831 |
|
---|
832 | return pBlockGroup;
|
---|
833 | }
|
---|
834 |
|
---|
835 |
|
---|
836 | /**
|
---|
837 | * Frees the given block group.
|
---|
838 | *
|
---|
839 | * @returns nothing.
|
---|
840 | * @param pThis The ext volume instance.
|
---|
841 | * @param pBlockGroup The block group to free.
|
---|
842 | */
|
---|
843 | static void rtFsExtBlockGroupFree(PRTFSEXTVOL pThis, PRTFSEXTBLKGRP pBlockGroup)
|
---|
844 | {
|
---|
845 | Assert(!pBlockGroup->cRefs);
|
---|
846 |
|
---|
847 | /*
|
---|
848 | * Put it into the cache if the limit wasn't exceeded, otherwise the block group
|
---|
849 | * is freed right away.
|
---|
850 | */
|
---|
851 | if (pThis->cbBlockGroups <= RTFSEXT_MAX_BLOCK_GROUP_CACHE_SIZE)
|
---|
852 | {
|
---|
853 | /* Put onto the LRU list. */
|
---|
854 | RTListPrepend(&pThis->LstBlockGroupLru, &pBlockGroup->NdLru);
|
---|
855 | }
|
---|
856 | else
|
---|
857 | {
|
---|
858 | /* Remove from the tree and free memory. */
|
---|
859 | PAVLU32NODECORE pCore = RTAvlU32Remove(&pThis->BlockGroupRoot, pBlockGroup->Core.Key);
|
---|
860 | Assert(pCore == &pBlockGroup->Core); RT_NOREF(pCore);
|
---|
861 | RTMemFree(pBlockGroup);
|
---|
862 | pThis->cbBlockGroups -= sizeof(RTFSEXTBLKGRP) + pThis->cbBlockBitmap + pThis->cbInodeBitmap;
|
---|
863 | }
|
---|
864 | }
|
---|
865 |
|
---|
866 |
|
---|
867 | /**
|
---|
868 | * Returns a new block group utilizing the cache if possible.
|
---|
869 | *
|
---|
870 | * @returns Pointer to the new block group descriptor or NULL if out of memory.
|
---|
871 | * @param pThis The ext volume instance.
|
---|
872 | * @param iBlockGroup Block group number.
|
---|
873 | */
|
---|
874 | static PRTFSEXTBLKGRP rtFsExtBlockGroupGetNew(PRTFSEXTVOL pThis, uint32_t iBlockGroup)
|
---|
875 | {
|
---|
876 | PRTFSEXTBLKGRP pBlockGroup = NULL;
|
---|
877 | size_t cbAlloc = sizeof(RTFSEXTBLKGRP) + pThis->cbBlockBitmap + pThis->cbInodeBitmap;
|
---|
878 | if (pThis->cbBlockGroups + cbAlloc <= RTFSEXT_MAX_BLOCK_GROUP_CACHE_SIZE)
|
---|
879 | pBlockGroup = rtFsExtBlockGroupAlloc(pThis, cbAlloc, iBlockGroup);
|
---|
880 | else
|
---|
881 | {
|
---|
882 | pBlockGroup = RTListRemoveLast(&pThis->LstBlockGroupLru, RTFSEXTBLKGRP, NdLru);
|
---|
883 | if (!pBlockGroup)
|
---|
884 | pBlockGroup = rtFsExtBlockGroupAlloc(pThis, cbAlloc, iBlockGroup);
|
---|
885 | else
|
---|
886 | {
|
---|
887 | /* Remove the block group from the tree because it gets a new key. */
|
---|
888 | PAVLU32NODECORE pCore = RTAvlU32Remove(&pThis->BlockGroupRoot, pBlockGroup->Core.Key);
|
---|
889 | Assert(pCore == &pBlockGroup->Core); RT_NOREF(pCore);
|
---|
890 | }
|
---|
891 | }
|
---|
892 |
|
---|
893 | Assert(!pBlockGroup->cRefs);
|
---|
894 | pBlockGroup->Core.Key = iBlockGroup;
|
---|
895 | pBlockGroup->cRefs = 1;
|
---|
896 |
|
---|
897 | return pBlockGroup;
|
---|
898 | }
|
---|
899 |
|
---|
900 |
|
---|
901 | /**
|
---|
902 | * Loads the given block group number and returns it on success.
|
---|
903 | *
|
---|
904 | * @returns IPRT status code.
|
---|
905 | * @param pThis The ext volume instance.
|
---|
906 | * @param iBlockGroup The block group to load.
|
---|
907 | * @param ppBlockGroup Where to store the block group on success.
|
---|
908 | */
|
---|
909 | static int rtFsExtBlockGroupLoad(PRTFSEXTVOL pThis, uint32_t iBlockGroup, PRTFSEXTBLKGRP *ppBlockGroup)
|
---|
910 | {
|
---|
911 | int rc = VINF_SUCCESS;
|
---|
912 |
|
---|
913 | /* Try to fetch the block group from the cache first. */
|
---|
914 | PRTFSEXTBLKGRP pBlockGroup = (PRTFSEXTBLKGRP)RTAvlU32Get(&pThis->BlockGroupRoot, iBlockGroup);
|
---|
915 | if (!pBlockGroup)
|
---|
916 | {
|
---|
917 | /* Slow path, load from disk. */
|
---|
918 | pBlockGroup = rtFsExtBlockGroupGetNew(pThis, iBlockGroup);
|
---|
919 | if (RT_LIKELY(pBlockGroup))
|
---|
920 | {
|
---|
921 | uint64_t offRead = rtFsExtBlockIdxToDiskOffset(pThis, pThis->cbBlock == _1K ? 2 : 1)
|
---|
922 | + (uint64_t)iBlockGroup * pThis->cbBlkGrpDesc;
|
---|
923 | EXTBLOCKGROUPDESC BlockGroupDesc;
|
---|
924 | rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &BlockGroupDesc, pThis->cbBlkGrpDesc, NULL);
|
---|
925 | if (RT_SUCCESS(rc))
|
---|
926 | {
|
---|
927 | #ifdef LOG_ENABLED
|
---|
928 | rtFsExtBlockGroup_Log(pThis, iBlockGroup, &BlockGroupDesc);
|
---|
929 | #endif
|
---|
930 | pBlockGroup->iBlockInodeTbl = RT_LE2H_U32(BlockGroupDesc.v32.offInodeTableLow)
|
---|
931 | | ((pThis->cbBlkGrpDesc == sizeof(EXTBLOCKGROUPDESC64))
|
---|
932 | ? (uint64_t)RT_LE2H_U32(BlockGroupDesc.v64.offInodeTableHigh) << 32
|
---|
933 | : 0);
|
---|
934 |
|
---|
935 | offRead = rtFsExtBlockIdxLowHighToDiskOffset(pThis, RT_LE2H_U32(BlockGroupDesc.v32.offBlockBitmapLow),
|
---|
936 | RT_LE2H_U32(BlockGroupDesc.v64.offBlockBitmapHigh));
|
---|
937 | rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &pBlockGroup->abBlockBitmap[0], pThis->cbBlockBitmap, NULL);
|
---|
938 | if (RT_SUCCESS(rc))
|
---|
939 | {
|
---|
940 | offRead = rtFsExtBlockIdxLowHighToDiskOffset(pThis, RT_LE2H_U32(BlockGroupDesc.v32.offInodeBitmapLow),
|
---|
941 | RT_LE2H_U32(BlockGroupDesc.v64.offInodeBitmapHigh));
|
---|
942 | rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &pBlockGroup->pabInodeBitmap[0], pThis->cbInodeBitmap, NULL);
|
---|
943 | if (RT_SUCCESS(rc))
|
---|
944 | {
|
---|
945 | bool fIns = RTAvlU32Insert(&pThis->BlockGroupRoot, &pBlockGroup->Core);
|
---|
946 | Assert(fIns); RT_NOREF(fIns);
|
---|
947 | }
|
---|
948 | }
|
---|
949 | }
|
---|
950 | }
|
---|
951 | else
|
---|
952 | rc = VERR_NO_MEMORY;
|
---|
953 | }
|
---|
954 | else
|
---|
955 | {
|
---|
956 | /* Remove from current LRU list position and add to the beginning. */
|
---|
957 | uint32_t cRefs = ASMAtomicIncU32(&pBlockGroup->cRefs);
|
---|
958 | if (cRefs == 1) /* Block groups get removed from the LRU list if they are referenced. */
|
---|
959 | RTListNodeRemove(&pBlockGroup->NdLru);
|
---|
960 | }
|
---|
961 |
|
---|
962 | if (RT_SUCCESS(rc))
|
---|
963 | *ppBlockGroup = pBlockGroup;
|
---|
964 | else if (pBlockGroup)
|
---|
965 | {
|
---|
966 | ASMAtomicDecU32(&pBlockGroup->cRefs);
|
---|
967 | rtFsExtBlockGroupFree(pThis, pBlockGroup); /* Free the block group. */
|
---|
968 | }
|
---|
969 |
|
---|
970 | return rc;
|
---|
971 | }
|
---|
972 |
|
---|
973 |
|
---|
974 | /**
|
---|
975 | * Releases a reference of the given block group.
|
---|
976 | *
|
---|
977 | * @returns nothing.
|
---|
978 | * @param pThis The ext volume instance.
|
---|
979 | * @param pBlockGroup The block group to release.
|
---|
980 | */
|
---|
981 | static void rtFsExtBlockGroupRelease(PRTFSEXTVOL pThis, PRTFSEXTBLKGRP pBlockGroup)
|
---|
982 | {
|
---|
983 | uint32_t cRefs = ASMAtomicDecU32(&pBlockGroup->cRefs);
|
---|
984 | if (!cRefs)
|
---|
985 | rtFsExtBlockGroupFree(pThis, pBlockGroup);
|
---|
986 | }
|
---|
987 |
|
---|
988 |
|
---|
989 | /**
|
---|
990 | * Allocates a new inode.
|
---|
991 | *
|
---|
992 | * @returns Pointer to the new inode or NULL if out of memory.
|
---|
993 | * @param pThis The ext volume instance.
|
---|
994 | * @param iInode Inode number.
|
---|
995 | */
|
---|
996 | static PRTFSEXTINODE rtFsExtInodeAlloc(PRTFSEXTVOL pThis, uint32_t iInode)
|
---|
997 | {
|
---|
998 | PRTFSEXTINODE pInode = (PRTFSEXTINODE)RTMemAllocZ(sizeof(RTFSEXTINODE));
|
---|
999 | if (RT_LIKELY(pInode))
|
---|
1000 | {
|
---|
1001 | pInode->Core.Key = iInode;
|
---|
1002 | pInode->cRefs = 0;
|
---|
1003 | pThis->cbInodes += sizeof(RTFSEXTINODE);
|
---|
1004 | }
|
---|
1005 |
|
---|
1006 | return pInode;
|
---|
1007 | }
|
---|
1008 |
|
---|
1009 |
|
---|
1010 | /**
|
---|
1011 | * Frees the given inode.
|
---|
1012 | *
|
---|
1013 | * @returns nothing.
|
---|
1014 | * @param pThis The ext volume instance.
|
---|
1015 | * @param pInode The inode to free.
|
---|
1016 | */
|
---|
1017 | static void rtFsExtInodeFree(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode)
|
---|
1018 | {
|
---|
1019 | Assert(!pInode->cRefs);
|
---|
1020 |
|
---|
1021 | /*
|
---|
1022 | * Put it into the cache if the limit wasn't exceeded, otherwise the inode
|
---|
1023 | * is freed right away.
|
---|
1024 | */
|
---|
1025 | if (pThis->cbInodes <= RTFSEXT_MAX_INODE_CACHE_SIZE)
|
---|
1026 | {
|
---|
1027 | /* Put onto the LRU list. */
|
---|
1028 | RTListPrepend(&pThis->LstInodeLru, &pInode->NdLru);
|
---|
1029 | }
|
---|
1030 | else
|
---|
1031 | {
|
---|
1032 | /* Remove from the tree and free memory. */
|
---|
1033 | PAVLU32NODECORE pCore = RTAvlU32Remove(&pThis->InodeRoot, pInode->Core.Key);
|
---|
1034 | Assert(pCore == &pInode->Core); RT_NOREF(pCore);
|
---|
1035 | RTMemFree(pInode);
|
---|
1036 | pThis->cbInodes -= sizeof(RTFSEXTINODE);
|
---|
1037 | }
|
---|
1038 | }
|
---|
1039 |
|
---|
1040 |
|
---|
1041 | /**
|
---|
1042 | * Returns a new inodep utilizing the cache if possible.
|
---|
1043 | *
|
---|
1044 | * @returns Pointer to the new inode or NULL if out of memory.
|
---|
1045 | * @param pThis The ext volume instance.
|
---|
1046 | * @param iInode Inode number.
|
---|
1047 | */
|
---|
1048 | static PRTFSEXTINODE rtFsExtInodeGetNew(PRTFSEXTVOL pThis, uint32_t iInode)
|
---|
1049 | {
|
---|
1050 | PRTFSEXTINODE pInode = NULL;
|
---|
1051 | if (pThis->cbInodes + sizeof(RTFSEXTINODE) <= RTFSEXT_MAX_INODE_CACHE_SIZE)
|
---|
1052 | pInode = rtFsExtInodeAlloc(pThis, iInode);
|
---|
1053 | else
|
---|
1054 | {
|
---|
1055 | pInode = RTListRemoveLast(&pThis->LstInodeLru, RTFSEXTINODE, NdLru);
|
---|
1056 | if (!pInode)
|
---|
1057 | pInode = rtFsExtInodeAlloc(pThis, iInode);
|
---|
1058 | else
|
---|
1059 | {
|
---|
1060 | /* Remove the block group from the tree because it gets a new key. */
|
---|
1061 | PAVLU32NODECORE pCore = RTAvlU32Remove(&pThis->InodeRoot, pInode->Core.Key);
|
---|
1062 | Assert(pCore == &pInode->Core); RT_NOREF(pCore);
|
---|
1063 | }
|
---|
1064 | }
|
---|
1065 |
|
---|
1066 | Assert(!pInode->cRefs);
|
---|
1067 | pInode->Core.Key = iInode;
|
---|
1068 | pInode->cRefs = 1;
|
---|
1069 |
|
---|
1070 | return pInode;
|
---|
1071 | }
|
---|
1072 |
|
---|
1073 |
|
---|
1074 | /**
|
---|
1075 | * Loads the given inode number and returns it on success.
|
---|
1076 | *
|
---|
1077 | * @returns IPRT status code.
|
---|
1078 | * @param pThis The ext volume instance.
|
---|
1079 | * @param iInode The inode to load.
|
---|
1080 | * @param ppInode Where to store the inode on success.
|
---|
1081 | */
|
---|
1082 | static int rtFsExtInodeLoad(PRTFSEXTVOL pThis, uint32_t iInode, PRTFSEXTINODE *ppInode)
|
---|
1083 | {
|
---|
1084 | int rc = VINF_SUCCESS;
|
---|
1085 |
|
---|
1086 | /* Try to fetch the inode from the cache first. */
|
---|
1087 | PRTFSEXTINODE pInode = (PRTFSEXTINODE)RTAvlU32Get(&pThis->InodeRoot, iInode);
|
---|
1088 | if (!pInode)
|
---|
1089 | {
|
---|
1090 | /* Slow path, load from disk. */
|
---|
1091 | pInode = rtFsExtInodeGetNew(pThis, iInode);
|
---|
1092 | if (RT_LIKELY(pInode))
|
---|
1093 | {
|
---|
1094 | /* Calculate the block group and load that one first to get at the inode table location. */
|
---|
1095 | PRTFSEXTBLKGRP pBlockGroup = NULL;
|
---|
1096 | rc = rtFsExtBlockGroupLoad(pThis, (iInode - 1) / pThis->cInodesPerGroup, &pBlockGroup);
|
---|
1097 | if (RT_SUCCESS(rc))
|
---|
1098 | {
|
---|
1099 | uint32_t idxInodeInTbl = (iInode - 1) % pThis->cInodesPerGroup;
|
---|
1100 | uint64_t offRead = rtFsExtBlockIdxToDiskOffset(pThis, pBlockGroup->iBlockInodeTbl)
|
---|
1101 | + idxInodeInTbl * pThis->cbInode;
|
---|
1102 |
|
---|
1103 | /* Release block group here already as it is not required. */
|
---|
1104 | rtFsExtBlockGroupRelease(pThis, pBlockGroup);
|
---|
1105 |
|
---|
1106 | EXTINODECOMB Inode;
|
---|
1107 | rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead, &Inode, RT_MIN(sizeof(Inode), pThis->cbInode), NULL);
|
---|
1108 | if (RT_SUCCESS(rc))
|
---|
1109 | {
|
---|
1110 | #ifdef LOG_ENABLED
|
---|
1111 | rtFsExtInode_Log(pThis, iInode, &Inode);
|
---|
1112 | #endif
|
---|
1113 | pInode->offInode = offRead;
|
---|
1114 | pInode->fFlags = RT_LE2H_U32(Inode.Core.fFlags);
|
---|
1115 | pInode->ObjInfo.cbObject = (uint64_t)RT_LE2H_U32(Inode.Core.cbSizeHigh) << 32
|
---|
1116 | | (uint64_t)RT_LE2H_U32(Inode.Core.cbSizeLow);
|
---|
1117 | pInode->ObjInfo.cbAllocated = ( (uint64_t)RT_LE2H_U16(Inode.Core.Osd2.Lnx.cBlocksHigh) << 32
|
---|
1118 | | (uint64_t)RT_LE2H_U32(Inode.Core.cBlocksLow)) * pThis->cbBlock;
|
---|
1119 | RTTimeSpecSetSeconds(&pInode->ObjInfo.AccessTime, RT_LE2H_U32(Inode.Core.u32TimeLastAccess));
|
---|
1120 | RTTimeSpecSetSeconds(&pInode->ObjInfo.ModificationTime, RT_LE2H_U32(Inode.Core.u32TimeLastModification));
|
---|
1121 | RTTimeSpecSetSeconds(&pInode->ObjInfo.ChangeTime, RT_LE2H_U32(Inode.Core.u32TimeLastChange));
|
---|
1122 | pInode->ObjInfo.Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
|
---|
1123 | pInode->ObjInfo.Attr.u.Unix.uid = (uint32_t)RT_LE2H_U16(Inode.Core.Osd2.Lnx.uUidHigh) << 16
|
---|
1124 | | (uint32_t)RT_LE2H_U16(Inode.Core.uUidLow);
|
---|
1125 | pInode->ObjInfo.Attr.u.Unix.gid = (uint32_t)RT_LE2H_U16(Inode.Core.Osd2.Lnx.uGidHigh) << 16
|
---|
1126 | | (uint32_t)RT_LE2H_U16(Inode.Core.uGidLow);
|
---|
1127 | pInode->ObjInfo.Attr.u.Unix.cHardlinks = RT_LE2H_U16(Inode.Core.cHardLinks);
|
---|
1128 | pInode->ObjInfo.Attr.u.Unix.INodeIdDevice = 0;
|
---|
1129 | pInode->ObjInfo.Attr.u.Unix.INodeId = iInode;
|
---|
1130 | pInode->ObjInfo.Attr.u.Unix.fFlags = 0;
|
---|
1131 | pInode->ObjInfo.Attr.u.Unix.GenerationId = RT_LE2H_U32(Inode.Core.u32Version);
|
---|
1132 | pInode->ObjInfo.Attr.u.Unix.Device = 0;
|
---|
1133 | if (pThis->cbInode >= sizeof(EXTINODECOMB))
|
---|
1134 | RTTimeSpecSetSeconds(&pInode->ObjInfo.BirthTime, RT_LE2H_U32(Inode.Extra.u32TimeCreation));
|
---|
1135 | else
|
---|
1136 | RTTimeSpecSetSeconds(&pInode->ObjInfo.BirthTime, RT_LE2H_U32(Inode.Core.u32TimeLastChange));
|
---|
1137 | for (unsigned i = 0; i < RT_ELEMENTS(pInode->aiBlocks); i++)
|
---|
1138 | pInode->aiBlocks[i] = RT_LE2H_U32(Inode.Core.au32Block[i]);
|
---|
1139 |
|
---|
1140 | /* Fill in the mode. */
|
---|
1141 | pInode->ObjInfo.Attr.fMode = 0;
|
---|
1142 | uint32_t fInodeMode = RT_LE2H_U32(Inode.Core.fMode);
|
---|
1143 | switch (EXT_INODE_MODE_TYPE_GET_TYPE(fInodeMode))
|
---|
1144 | {
|
---|
1145 | case EXT_INODE_MODE_TYPE_FIFO:
|
---|
1146 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_FIFO;
|
---|
1147 | break;
|
---|
1148 | case EXT_INODE_MODE_TYPE_CHAR:
|
---|
1149 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_DEV_CHAR;
|
---|
1150 | break;
|
---|
1151 | case EXT_INODE_MODE_TYPE_DIR:
|
---|
1152 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_DIRECTORY;
|
---|
1153 | break;
|
---|
1154 | case EXT_INODE_MODE_TYPE_BLOCK:
|
---|
1155 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_DEV_BLOCK;
|
---|
1156 | break;
|
---|
1157 | case EXT_INODE_MODE_TYPE_REGULAR:
|
---|
1158 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_FILE;
|
---|
1159 | break;
|
---|
1160 | case EXT_INODE_MODE_TYPE_SYMLINK:
|
---|
1161 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_SYMLINK;
|
---|
1162 | break;
|
---|
1163 | case EXT_INODE_MODE_TYPE_SOCKET:
|
---|
1164 | pInode->ObjInfo.Attr.fMode |= RTFS_TYPE_SOCKET;
|
---|
1165 | break;
|
---|
1166 | default:
|
---|
1167 | rc = VERR_VFS_BOGUS_FORMAT;
|
---|
1168 | }
|
---|
1169 | if (fInodeMode & EXT_INODE_MODE_EXEC_OTHER)
|
---|
1170 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IXOTH;
|
---|
1171 | if (fInodeMode & EXT_INODE_MODE_WRITE_OTHER)
|
---|
1172 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IWOTH;
|
---|
1173 | if (fInodeMode & EXT_INODE_MODE_READ_OTHER)
|
---|
1174 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IROTH;
|
---|
1175 | if (fInodeMode & EXT_INODE_MODE_EXEC_GROUP)
|
---|
1176 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IXGRP;
|
---|
1177 | if (fInodeMode & EXT_INODE_MODE_WRITE_GROUP)
|
---|
1178 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IWGRP;
|
---|
1179 | if (fInodeMode & EXT_INODE_MODE_READ_GROUP)
|
---|
1180 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IRGRP;
|
---|
1181 | if (fInodeMode & EXT_INODE_MODE_EXEC_OWNER)
|
---|
1182 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IXUSR;
|
---|
1183 | if (fInodeMode & EXT_INODE_MODE_WRITE_OWNER)
|
---|
1184 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IWUSR;
|
---|
1185 | if (fInodeMode & EXT_INODE_MODE_READ_OWNER)
|
---|
1186 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_IRUSR;
|
---|
1187 | if (fInodeMode & EXT_INODE_MODE_STICKY)
|
---|
1188 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_ISTXT;
|
---|
1189 | if (fInodeMode & EXT_INODE_MODE_SET_GROUP_ID)
|
---|
1190 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_ISGID;
|
---|
1191 | if (fInodeMode & EXT_INODE_MODE_SET_USER_ID)
|
---|
1192 | pInode->ObjInfo.Attr.fMode |= RTFS_UNIX_ISUID;
|
---|
1193 | }
|
---|
1194 | }
|
---|
1195 |
|
---|
1196 | if (RT_SUCCESS(rc))
|
---|
1197 | {
|
---|
1198 | bool fIns = RTAvlU32Insert(&pThis->InodeRoot, &pInode->Core);
|
---|
1199 | Assert(fIns);
|
---|
1200 | }
|
---|
1201 | }
|
---|
1202 | else
|
---|
1203 | rc = VERR_NO_MEMORY;
|
---|
1204 | }
|
---|
1205 | else
|
---|
1206 | {
|
---|
1207 | /* Remove from current LRU list position and add to the beginning. */
|
---|
1208 | uint32_t cRefs = ASMAtomicIncU32(&pInode->cRefs);
|
---|
1209 | if (cRefs == 1) /* Inodes get removed from the LRU list if they are referenced. */
|
---|
1210 | RTListNodeRemove(&pInode->NdLru);
|
---|
1211 | }
|
---|
1212 |
|
---|
1213 | if (RT_SUCCESS(rc))
|
---|
1214 | *ppInode = pInode;
|
---|
1215 | else if (pInode)
|
---|
1216 | {
|
---|
1217 | ASMAtomicDecU32(&pInode->cRefs);
|
---|
1218 | rtFsExtInodeFree(pThis, pInode); /* Free the inode. */
|
---|
1219 | }
|
---|
1220 |
|
---|
1221 | return rc;
|
---|
1222 | }
|
---|
1223 |
|
---|
1224 |
|
---|
1225 | /**
|
---|
1226 | * Releases a reference of the given inode.
|
---|
1227 | *
|
---|
1228 | * @returns nothing.
|
---|
1229 | * @param pThis The ext volume instance.
|
---|
1230 | * @param pInode The inode to release.
|
---|
1231 | */
|
---|
1232 | static void rtFsExtInodeRelease(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode)
|
---|
1233 | {
|
---|
1234 | uint32_t cRefs = ASMAtomicDecU32(&pInode->cRefs);
|
---|
1235 | if (!cRefs)
|
---|
1236 | rtFsExtInodeFree(pThis, pInode);
|
---|
1237 | }
|
---|
1238 |
|
---|
1239 |
|
---|
1240 | /**
|
---|
1241 | * Worker for various QueryInfo methods.
|
---|
1242 | *
|
---|
1243 | * @returns IPRT status code.
|
---|
1244 | * @param pInode The inode structure to return info for.
|
---|
1245 | * @param pObjInfo Where to return object info.
|
---|
1246 | * @param enmAddAttr What additional info to return.
|
---|
1247 | */
|
---|
1248 | static int rtFsExtInode_QueryInfo(PRTFSEXTINODE pInode, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
1249 | {
|
---|
1250 | RT_ZERO(*pObjInfo);
|
---|
1251 |
|
---|
1252 | pObjInfo->cbObject = pInode->ObjInfo.cbObject;
|
---|
1253 | pObjInfo->cbAllocated = pInode->ObjInfo.cbAllocated;
|
---|
1254 | pObjInfo->AccessTime = pInode->ObjInfo.AccessTime;
|
---|
1255 | pObjInfo->ModificationTime = pInode->ObjInfo.ModificationTime;
|
---|
1256 | pObjInfo->ChangeTime = pInode->ObjInfo.ChangeTime;
|
---|
1257 | pObjInfo->BirthTime = pInode->ObjInfo.BirthTime;
|
---|
1258 | pObjInfo->Attr.fMode = pInode->ObjInfo.Attr.fMode;
|
---|
1259 | pObjInfo->Attr.enmAdditional = enmAddAttr;
|
---|
1260 | switch (enmAddAttr)
|
---|
1261 | {
|
---|
1262 | case RTFSOBJATTRADD_UNIX:
|
---|
1263 | memcpy(&pObjInfo->Attr.u.Unix, &pInode->ObjInfo.Attr.u.Unix, sizeof(pInode->ObjInfo.Attr.u.Unix));
|
---|
1264 | break;
|
---|
1265 |
|
---|
1266 | case RTFSOBJATTRADD_UNIX_OWNER:
|
---|
1267 | pObjInfo->Attr.u.UnixOwner.uid = pInode->ObjInfo.Attr.u.Unix.uid;
|
---|
1268 | break;
|
---|
1269 |
|
---|
1270 | case RTFSOBJATTRADD_UNIX_GROUP:
|
---|
1271 | pObjInfo->Attr.u.UnixGroup.gid = pInode->ObjInfo.Attr.u.Unix.gid;
|
---|
1272 | break;
|
---|
1273 |
|
---|
1274 | default:
|
---|
1275 | break;
|
---|
1276 | }
|
---|
1277 |
|
---|
1278 | return VINF_SUCCESS;
|
---|
1279 | }
|
---|
1280 |
|
---|
1281 |
|
---|
1282 | /**
|
---|
1283 | * Validates a given extent header.
|
---|
1284 | *
|
---|
1285 | * @returns Flag whether the extent header appears to be valid.
|
---|
1286 | * @param pExtentHdr The extent header to validate.
|
---|
1287 | */
|
---|
1288 | DECLINLINE(bool) rtFsExtInode_ExtentHdrValidate(PCEXTEXTENTHDR pExtentHdr)
|
---|
1289 | {
|
---|
1290 | return RT_LE2H_U16(pExtentHdr->u16Magic) == EXT_EXTENT_HDR_MAGIC
|
---|
1291 | && RT_LE2H_U16(pExtentHdr->cEntries) <= RT_LE2H_U16(pExtentHdr->cMax)
|
---|
1292 | && RT_LE2H_U16(pExtentHdr->uDepth) <= EXT_EXTENT_HDR_DEPTH_MAX;
|
---|
1293 | }
|
---|
1294 |
|
---|
1295 |
|
---|
1296 | /**
|
---|
1297 | * Parses the given extent, checking whether it intersects with the given block.
|
---|
1298 | *
|
---|
1299 | * @returns Flag whether the extent maps the given range (at least partly).
|
---|
1300 | * @param pExtent The extent to parse.
|
---|
1301 | * @param iBlock The starting inode block to map.
|
---|
1302 | * @param cBlocks Number of blocks requested.
|
---|
1303 | * @param piBlockFs Where to store the filesystem block on success.
|
---|
1304 | * @param pcBlocks Where to store the number of contiguous blocks on success.
|
---|
1305 | * @param pfSparse Where to store the sparse flag on success.
|
---|
1306 | */
|
---|
1307 | DECLINLINE(bool) rtFsExtInode_ExtentParse(PCEXTEXTENT pExtent, uint64_t iBlock, size_t cBlocks,
|
---|
1308 | uint64_t *piBlockFs, size_t *pcBlocks, bool *pfSparse)
|
---|
1309 | {
|
---|
1310 | #ifdef LOG_ENABLED
|
---|
1311 | rtFsExtExtent_Log(pExtent);
|
---|
1312 | #endif
|
---|
1313 |
|
---|
1314 | uint32_t iExtentBlock = RT_LE2H_U32(pExtent->iBlock);
|
---|
1315 | uint16_t cExtentLength = RT_LE2H_U16(pExtent->cBlocks);
|
---|
1316 |
|
---|
1317 | /* Length over EXT_EXTENT_LENGTH_LIMIT blocks indicate a sparse extent. */
|
---|
1318 | if (cExtentLength > EXT_EXTENT_LENGTH_LIMIT)
|
---|
1319 | {
|
---|
1320 | *pfSparse = true;
|
---|
1321 | cExtentLength -= EXT_EXTENT_LENGTH_LIMIT;
|
---|
1322 | }
|
---|
1323 | else
|
---|
1324 | *pfSparse = false;
|
---|
1325 |
|
---|
1326 | if ( iExtentBlock <= iBlock
|
---|
1327 | && iExtentBlock + cExtentLength > iBlock)
|
---|
1328 | {
|
---|
1329 | uint32_t iBlockRel = iBlock - iExtentBlock;
|
---|
1330 | *pcBlocks = RT_MIN(cBlocks, cExtentLength - iBlockRel);
|
---|
1331 | *piBlockFs = ( ((uint64_t)RT_LE2H_U16(pExtent->offStartHigh)) << 32
|
---|
1332 | | ((uint64_t)RT_LE2H_U32(pExtent->offStartLow))) + iBlockRel;
|
---|
1333 | return true;
|
---|
1334 | }
|
---|
1335 |
|
---|
1336 | return false;
|
---|
1337 | }
|
---|
1338 |
|
---|
1339 |
|
---|
1340 | /**
|
---|
1341 | * Locates the location of the next level in the extent tree mapping the given block.
|
---|
1342 | *
|
---|
1343 | * @returns Filesystem block number where the next level of the extent is stored.
|
---|
1344 | * @param paExtentIdx Pointer to the array of extent index nodes.
|
---|
1345 | * @param cEntries Number of entries in the extent index node array.
|
---|
1346 | * @param iBlock The block to resolve.
|
---|
1347 | */
|
---|
1348 | DECLINLINE(uint64_t) rtFsExtInode_ExtentIndexLocateNextLvl(PCEXTEXTENTIDX paExtentIdx, uint16_t cEntries, uint64_t iBlock)
|
---|
1349 | {
|
---|
1350 | for (uint32_t i = 1; i < cEntries; i++)
|
---|
1351 | {
|
---|
1352 | PCEXTEXTENTIDX pPrev = &paExtentIdx[i - 1];
|
---|
1353 | PCEXTEXTENTIDX pCur = &paExtentIdx[i];
|
---|
1354 |
|
---|
1355 | #ifdef LOG_ENABLED
|
---|
1356 | rtFsExtExtentIdx_Log(pPrev);
|
---|
1357 | #endif
|
---|
1358 |
|
---|
1359 | if ( RT_LE2H_U32(pPrev->iBlock) <= iBlock
|
---|
1360 | && RT_LE2H_U32(pCur->iBlock) > iBlock)
|
---|
1361 | return (uint64_t)RT_LE2H_U16(pPrev->offChildHigh) << 32
|
---|
1362 | | (uint64_t)RT_LE2H_U32(pPrev->offChildLow);
|
---|
1363 | }
|
---|
1364 |
|
---|
1365 | /* Nothing found so far, the blast extent index must cover the block as the array is sorted. */
|
---|
1366 | PCEXTEXTENTIDX pLast = &paExtentIdx[cEntries - 1];
|
---|
1367 | #ifdef LOG_ENABLED
|
---|
1368 | rtFsExtExtentIdx_Log(pLast);
|
---|
1369 | #endif
|
---|
1370 |
|
---|
1371 | return (uint64_t)RT_LE2H_U16(pLast->offChildHigh) << 32
|
---|
1372 | | (uint64_t)RT_LE2H_U32(pLast->offChildLow);
|
---|
1373 | }
|
---|
1374 |
|
---|
1375 |
|
---|
1376 | /**
|
---|
1377 | * Maps the given inode block to the destination filesystem block using the embedded extent tree.
|
---|
1378 | *
|
---|
1379 | * @returns IPRT status code.
|
---|
1380 | * @param pThis The ext volume instance.
|
---|
1381 | * @param pInode The inode structure to read from.
|
---|
1382 | * @param iBlock The starting inode block to map.
|
---|
1383 | * @param cBlocks Number of blocks requested.
|
---|
1384 | * @param piBlockFs Where to store the filesystem block on success.
|
---|
1385 | * @param pcBlocks Where to store the number of contiguous blocks on success.
|
---|
1386 | * @param pfSparse Where to store the sparse flag on success.
|
---|
1387 | *
|
---|
1388 | * @todo Optimize
|
---|
1389 | */
|
---|
1390 | static int rtFsExtInode_MapBlockToFsViaExtent(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode, uint64_t iBlock, size_t cBlocks,
|
---|
1391 | uint64_t *piBlockFs, size_t *pcBlocks, bool *pfSparse)
|
---|
1392 | {
|
---|
1393 | int rc = VINF_SUCCESS;
|
---|
1394 |
|
---|
1395 | /* The root of the extent tree is located in the block data of the inode. */
|
---|
1396 | PCEXTEXTENTHDR pExtentHdr = (PCEXTEXTENTHDR)&pInode->aiBlocks[0];
|
---|
1397 |
|
---|
1398 | #ifdef LOG_ENABLED
|
---|
1399 | rtFsExtExtentHdr_Log(pExtentHdr);
|
---|
1400 | #endif
|
---|
1401 |
|
---|
1402 | /*
|
---|
1403 | * Some validation, the top level is located inside the inode block data
|
---|
1404 | * and has a maxmimum of 4 entries.
|
---|
1405 | */
|
---|
1406 | if ( rtFsExtInode_ExtentHdrValidate(pExtentHdr)
|
---|
1407 | && RT_LE2H_U16(pExtentHdr->cMax) <= 4)
|
---|
1408 | {
|
---|
1409 | uint16_t uDepthCur = RT_LE2H_U16(pExtentHdr->uDepth);
|
---|
1410 | if (!uDepthCur)
|
---|
1411 | {
|
---|
1412 | PCEXTEXTENT pExtent = (PCEXTEXTENT)(pExtentHdr + 1);
|
---|
1413 |
|
---|
1414 | rc = VERR_VFS_BOGUS_FORMAT;
|
---|
1415 | for (uint32_t i = 0; i < RT_LE2H_U16(pExtentHdr->cEntries); i++)
|
---|
1416 | {
|
---|
1417 | /* Check whether the extent intersects with the block. */
|
---|
1418 | if (rtFsExtInode_ExtentParse(pExtent, iBlock, cBlocks, piBlockFs, pcBlocks, pfSparse))
|
---|
1419 | {
|
---|
1420 | rc = VINF_SUCCESS;
|
---|
1421 | break;
|
---|
1422 | }
|
---|
1423 | pExtent++;
|
---|
1424 | }
|
---|
1425 | }
|
---|
1426 | else
|
---|
1427 | {
|
---|
1428 | uint8_t *pbExtent = NULL;
|
---|
1429 | PRTFSEXTBLOCKENTRY pBlock = NULL;
|
---|
1430 | uint64_t iBlockNext = 0;
|
---|
1431 | PCEXTEXTENTIDX paExtentIdx = (PCEXTEXTENTIDX)(pExtentHdr + 1);
|
---|
1432 | uint16_t cEntries = RT_LE2H_U16(pExtentHdr->cEntries);
|
---|
1433 |
|
---|
1434 | /* Descend the tree until we reached the leaf nodes. */
|
---|
1435 | do
|
---|
1436 | {
|
---|
1437 | iBlockNext = rtFsExtInode_ExtentIndexLocateNextLvl(paExtentIdx, cEntries, iBlock);
|
---|
1438 | /* Read in the full block. */
|
---|
1439 | rc = rtFsExtVol_BlockLoad(pThis, iBlockNext, &pBlock, (void **)&pbExtent);
|
---|
1440 | if (RT_SUCCESS(rc))
|
---|
1441 | {
|
---|
1442 | pExtentHdr = (PCEXTEXTENTHDR)pbExtent;
|
---|
1443 |
|
---|
1444 | #ifdef LOG_ENABLED
|
---|
1445 | rtFsExtExtentHdr_Log(pExtentHdr);
|
---|
1446 | #endif
|
---|
1447 |
|
---|
1448 | if ( rtFsExtInode_ExtentHdrValidate(pExtentHdr)
|
---|
1449 | && RT_LE2H_U16(pExtentHdr->cMax) <= (pThis->cbBlock - sizeof(EXTEXTENTHDR)) / sizeof(EXTEXTENTIDX)
|
---|
1450 | && RT_LE2H_U16(pExtentHdr->uDepth) == uDepthCur - 1)
|
---|
1451 | {
|
---|
1452 | uDepthCur--;
|
---|
1453 | cEntries = RT_LE2H_U16(pExtentHdr->cEntries);
|
---|
1454 | paExtentIdx = (PCEXTEXTENTIDX)(pExtentHdr + 1);
|
---|
1455 | if (uDepthCur)
|
---|
1456 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1457 | }
|
---|
1458 | else
|
---|
1459 | rc = VERR_VFS_BOGUS_FORMAT;
|
---|
1460 | }
|
---|
1461 | }
|
---|
1462 | while ( uDepthCur > 0
|
---|
1463 | && RT_SUCCESS(rc));
|
---|
1464 |
|
---|
1465 | if (RT_SUCCESS(rc))
|
---|
1466 | {
|
---|
1467 | Assert(!uDepthCur);
|
---|
1468 |
|
---|
1469 | /* We reached the leaf nodes. */
|
---|
1470 | PCEXTEXTENT pExtent = (PCEXTEXTENT)(pExtentHdr + 1);
|
---|
1471 | for (uint32_t i = 0; i < RT_LE2H_U16(pExtentHdr->cEntries); i++)
|
---|
1472 | {
|
---|
1473 | /* Check whether the extent intersects with the block. */
|
---|
1474 | if (rtFsExtInode_ExtentParse(pExtent, iBlock, cBlocks, piBlockFs, pcBlocks, pfSparse))
|
---|
1475 | {
|
---|
1476 | rc = VINF_SUCCESS;
|
---|
1477 | break;
|
---|
1478 | }
|
---|
1479 | pExtent++;
|
---|
1480 | }
|
---|
1481 | }
|
---|
1482 |
|
---|
1483 | if (pBlock)
|
---|
1484 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1485 | }
|
---|
1486 | }
|
---|
1487 | else
|
---|
1488 | rc = VERR_VFS_BOGUS_FORMAT;
|
---|
1489 |
|
---|
1490 | return rc;
|
---|
1491 | }
|
---|
1492 |
|
---|
1493 |
|
---|
1494 | /**
|
---|
1495 | * Maps the given inode block to the destination filesystem block using the original block mapping scheme.
|
---|
1496 | *
|
---|
1497 | * @returns IPRT status code.
|
---|
1498 | * @param pThis The ext volume instance.
|
---|
1499 | * @param pInode The inode structure to read from.
|
---|
1500 | * @param iBlock The inode block to map.
|
---|
1501 | * @param cBlocks Number of blocks requested.
|
---|
1502 | * @param piBlockFs Where to store the filesystem block on success.
|
---|
1503 | * @param pcBlocks Where to store the number of contiguous blocks on success.
|
---|
1504 | * @param pfSparse Where to store the sparse flag on success.
|
---|
1505 | *
|
---|
1506 | * @todo Optimize and handle sparse files.
|
---|
1507 | */
|
---|
1508 | static int rtFsExtInode_MapBlockToFsViaBlockMap(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode, uint64_t iBlock, size_t cBlocks,
|
---|
1509 | uint64_t *piBlockFs, size_t *pcBlocks, bool *pfSparse)
|
---|
1510 | {
|
---|
1511 | int rc = VINF_SUCCESS;
|
---|
1512 | RT_NOREF(cBlocks);
|
---|
1513 |
|
---|
1514 | *pfSparse = false;
|
---|
1515 | *pcBlocks = 1;
|
---|
1516 |
|
---|
1517 | /* The first 12 inode blocks are directly mapped from the inode. */
|
---|
1518 | if (iBlock <= 11)
|
---|
1519 | *piBlockFs = pInode->aiBlocks[iBlock];
|
---|
1520 | else
|
---|
1521 | {
|
---|
1522 | uint32_t cEntriesPerBlockMap = (uint32_t)(pThis->cbBlock >> sizeof(uint32_t));
|
---|
1523 |
|
---|
1524 | if (iBlock <= cEntriesPerBlockMap + 11)
|
---|
1525 | {
|
---|
1526 | /* Indirect block. */
|
---|
1527 | PRTFSEXTBLOCKENTRY pBlock = NULL;
|
---|
1528 | uint32_t *paBlockMap = NULL;
|
---|
1529 | rc = rtFsExtVol_BlockLoad(pThis, pInode->aiBlocks[12], &pBlock, (void **)&paBlockMap);
|
---|
1530 | if (RT_SUCCESS(rc))
|
---|
1531 | {
|
---|
1532 | *piBlockFs = RT_LE2H_U32(paBlockMap[iBlock - 12]);
|
---|
1533 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1534 | }
|
---|
1535 | }
|
---|
1536 | else if (iBlock <= cEntriesPerBlockMap * cEntriesPerBlockMap + cEntriesPerBlockMap + 11)
|
---|
1537 | {
|
---|
1538 | /* Double indirect block. */
|
---|
1539 | PRTFSEXTBLOCKENTRY pBlock = NULL;
|
---|
1540 | uint32_t *paBlockMap = NULL;
|
---|
1541 |
|
---|
1542 | iBlock -= 12 + cEntriesPerBlockMap;
|
---|
1543 | rc = rtFsExtVol_BlockLoad(pThis, pInode->aiBlocks[13], &pBlock, (void **)&paBlockMap);
|
---|
1544 | if (RT_SUCCESS(rc))
|
---|
1545 | {
|
---|
1546 | uint32_t idxBlockL2 = iBlock / cEntriesPerBlockMap;
|
---|
1547 | uint32_t idxBlockL1 = iBlock % cEntriesPerBlockMap;
|
---|
1548 | uint32_t iBlockNext = RT_LE2H_U32(paBlockMap[idxBlockL2]);
|
---|
1549 |
|
---|
1550 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1551 | rc = rtFsExtVol_BlockLoad(pThis, iBlockNext, &pBlock, (void **)&paBlockMap);
|
---|
1552 | if (RT_SUCCESS(rc))
|
---|
1553 | {
|
---|
1554 | *piBlockFs = RT_LE2H_U32(paBlockMap[idxBlockL1]);
|
---|
1555 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1556 | }
|
---|
1557 | }
|
---|
1558 | }
|
---|
1559 | else
|
---|
1560 | {
|
---|
1561 | /* Triple indirect block. */
|
---|
1562 | PRTFSEXTBLOCKENTRY pBlock = NULL;
|
---|
1563 | uint32_t *paBlockMap = NULL;
|
---|
1564 |
|
---|
1565 | iBlock -= 12 + cEntriesPerBlockMap * cEntriesPerBlockMap + cEntriesPerBlockMap;
|
---|
1566 | rc = rtFsExtVol_BlockLoad(pThis, pInode->aiBlocks[14], &pBlock, (void **)&paBlockMap);
|
---|
1567 | if (RT_SUCCESS(rc))
|
---|
1568 | {
|
---|
1569 | uint32_t idxBlockL3 = iBlock / (cEntriesPerBlockMap * cEntriesPerBlockMap);
|
---|
1570 | uint32_t iBlockNext = RT_LE2H_U32(paBlockMap[idxBlockL3]);
|
---|
1571 |
|
---|
1572 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1573 | rc = rtFsExtVol_BlockLoad(pThis, iBlockNext, &pBlock, (void **)&paBlockMap);
|
---|
1574 | if (RT_SUCCESS(rc))
|
---|
1575 | {
|
---|
1576 | uint32_t idxBlockL2 = (iBlock % (cEntriesPerBlockMap * cEntriesPerBlockMap)) / cEntriesPerBlockMap;
|
---|
1577 | uint32_t idxBlockL1 = iBlock % cEntriesPerBlockMap;
|
---|
1578 | iBlockNext = RT_LE2H_U32(paBlockMap[idxBlockL2]);
|
---|
1579 |
|
---|
1580 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1581 | rc = rtFsExtVol_BlockLoad(pThis, iBlockNext, &pBlock, (void **)&paBlockMap);
|
---|
1582 | if (RT_SUCCESS(rc))
|
---|
1583 | {
|
---|
1584 | *piBlockFs = RT_LE2H_U32(paBlockMap[idxBlockL1]);
|
---|
1585 | rtFsExtVol_BlockRelease(pThis, pBlock);
|
---|
1586 | }
|
---|
1587 | }
|
---|
1588 | }
|
---|
1589 | }
|
---|
1590 | }
|
---|
1591 |
|
---|
1592 | return rc;
|
---|
1593 | }
|
---|
1594 |
|
---|
1595 |
|
---|
1596 | /**
|
---|
1597 | * Maps the given inode block to the destination filesystem block.
|
---|
1598 | *
|
---|
1599 | * @returns IPRT status code.
|
---|
1600 | * @param pThis The ext volume instance.
|
---|
1601 | * @param pInode The inode structure to read from.
|
---|
1602 | * @param iBlock The inode block to map.
|
---|
1603 | * @param cBlocks Number of blocks requested.
|
---|
1604 | * @param piBlockFs Where to store the filesystem block on success.
|
---|
1605 | * @param pcBlocks Where to store the number of contiguous blocks on success.
|
---|
1606 | * @param pfSparse Where to store the sparse flag on success.
|
---|
1607 | *
|
---|
1608 | * @todo Optimize
|
---|
1609 | */
|
---|
1610 | static int rtFsExtInode_MapBlockToFs(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode, uint64_t iBlock, size_t cBlocks,
|
---|
1611 | uint64_t *piBlockFs, size_t *pcBlocks, bool *pfSparse)
|
---|
1612 | {
|
---|
1613 | if (pInode->fFlags & EXT_INODE_F_EXTENTS)
|
---|
1614 | return rtFsExtInode_MapBlockToFsViaExtent(pThis, pInode, iBlock, cBlocks, piBlockFs, pcBlocks, pfSparse);
|
---|
1615 | else
|
---|
1616 | return rtFsExtInode_MapBlockToFsViaBlockMap(pThis, pInode, iBlock, cBlocks, piBlockFs, pcBlocks, pfSparse);
|
---|
1617 | }
|
---|
1618 |
|
---|
1619 |
|
---|
1620 | /**
|
---|
1621 | * Reads data from the given inode at the given byte offset.
|
---|
1622 | *
|
---|
1623 | * @returns IPRT status code.
|
---|
1624 | * @param pThis The ext volume instance.
|
---|
1625 | * @param pInode The inode structure to read from.
|
---|
1626 | * @param off The byte offset to start reading from.
|
---|
1627 | * @param pvBuf Where to store the read data to.
|
---|
1628 | * @param pcbRead Where to return the amount of data read.
|
---|
1629 | */
|
---|
1630 | static int rtFsExtInode_Read(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode, uint64_t off, void *pvBuf, size_t cbRead, size_t *pcbRead)
|
---|
1631 | {
|
---|
1632 | int rc = VINF_SUCCESS;
|
---|
1633 | uint8_t *pbBuf = (uint8_t *)pvBuf;
|
---|
1634 |
|
---|
1635 | if (((uint64_t)pInode->ObjInfo.cbObject < off + cbRead))
|
---|
1636 | {
|
---|
1637 | if (!pcbRead)
|
---|
1638 | return VERR_EOF;
|
---|
1639 | else
|
---|
1640 | cbRead = (uint64_t)pInode->ObjInfo.cbObject - off;
|
---|
1641 | }
|
---|
1642 |
|
---|
1643 | while ( cbRead
|
---|
1644 | && RT_SUCCESS(rc))
|
---|
1645 | {
|
---|
1646 | uint64_t iBlockStart = rtFsExtDiskOffsetToBlockIdx(pThis, off);
|
---|
1647 | uint32_t offBlockStart = off % pThis->cbBlock;
|
---|
1648 |
|
---|
1649 | /* Resolve the inode block to the proper filesystem block. */
|
---|
1650 | uint64_t iBlockFs = 0;
|
---|
1651 | size_t cBlocks = 0;
|
---|
1652 | bool fSparse = false;
|
---|
1653 | rc = rtFsExtInode_MapBlockToFs(pThis, pInode, iBlockStart, 1, &iBlockFs, &cBlocks, &fSparse);
|
---|
1654 | if (RT_SUCCESS(rc))
|
---|
1655 | {
|
---|
1656 | Assert(cBlocks == 1);
|
---|
1657 |
|
---|
1658 | size_t cbThisRead = RT_MIN(cbRead, pThis->cbBlock - offBlockStart);
|
---|
1659 |
|
---|
1660 | if (!fSparse)
|
---|
1661 | {
|
---|
1662 | uint64_t offRead = rtFsExtBlockIdxToDiskOffset(pThis, iBlockFs);
|
---|
1663 | rc = RTVfsFileReadAt(pThis->hVfsBacking, offRead + offBlockStart, pbBuf, cbThisRead, NULL);
|
---|
1664 | }
|
---|
1665 | else
|
---|
1666 | memset(pbBuf, 0, cbThisRead);
|
---|
1667 |
|
---|
1668 | if (RT_SUCCESS(rc))
|
---|
1669 | {
|
---|
1670 | pbBuf += cbThisRead;
|
---|
1671 | cbRead -= cbThisRead;
|
---|
1672 | off += cbThisRead;
|
---|
1673 | if (pcbRead)
|
---|
1674 | *pcbRead += cbThisRead;
|
---|
1675 | }
|
---|
1676 | }
|
---|
1677 | }
|
---|
1678 |
|
---|
1679 | return rc;
|
---|
1680 | }
|
---|
1681 |
|
---|
1682 |
|
---|
1683 |
|
---|
1684 | /*
|
---|
1685 | *
|
---|
1686 | * File operations.
|
---|
1687 | * File operations.
|
---|
1688 | * File operations.
|
---|
1689 | *
|
---|
1690 | */
|
---|
1691 |
|
---|
1692 | /**
|
---|
1693 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
1694 | */
|
---|
1695 | static DECLCALLBACK(int) rtFsExtFile_Close(void *pvThis)
|
---|
1696 | {
|
---|
1697 | PRTFSEXTFILE pThis = (PRTFSEXTFILE)pvThis;
|
---|
1698 | LogFlow(("rtFsExtFile_Close(%p/%p)\n", pThis, pThis->pInode));
|
---|
1699 |
|
---|
1700 | rtFsExtInodeRelease(pThis->pVol, pThis->pInode);
|
---|
1701 | pThis->pInode = NULL;
|
---|
1702 | pThis->pVol = NULL;
|
---|
1703 | return VINF_SUCCESS;
|
---|
1704 | }
|
---|
1705 |
|
---|
1706 |
|
---|
1707 | /**
|
---|
1708 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
1709 | */
|
---|
1710 | static DECLCALLBACK(int) rtFsExtFile_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
1711 | {
|
---|
1712 | PRTFSEXTFILE pThis = (PRTFSEXTFILE)pvThis;
|
---|
1713 | return rtFsExtInode_QueryInfo(pThis->pInode, pObjInfo, enmAddAttr);
|
---|
1714 | }
|
---|
1715 |
|
---|
1716 |
|
---|
1717 | /**
|
---|
1718 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnRead}
|
---|
1719 | */
|
---|
1720 | static DECLCALLBACK(int) rtFsExtFile_Read(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead)
|
---|
1721 | {
|
---|
1722 | PRTFSEXTFILE pThis = (PRTFSEXTFILE)pvThis;
|
---|
1723 | AssertReturn(pSgBuf->cSegs == 1, VERR_INTERNAL_ERROR_3);
|
---|
1724 | RT_NOREF(fBlocking);
|
---|
1725 |
|
---|
1726 | if (off == -1)
|
---|
1727 | off = pThis->offFile;
|
---|
1728 | else
|
---|
1729 | AssertReturn(off >= 0, VERR_INTERNAL_ERROR_3);
|
---|
1730 |
|
---|
1731 | int rc;
|
---|
1732 | size_t cbRead = pSgBuf->paSegs[0].cbSeg;
|
---|
1733 | if (!pcbRead)
|
---|
1734 | {
|
---|
1735 | rc = rtFsExtInode_Read(pThis->pVol, pThis->pInode, (uint64_t)off, pSgBuf->paSegs[0].pvSeg, cbRead, NULL);
|
---|
1736 | if (RT_SUCCESS(rc))
|
---|
1737 | pThis->offFile = off + cbRead;
|
---|
1738 | Log6(("rtFsExtFile_Read: off=%#RX64 cbSeg=%#x -> %Rrc\n", off, pSgBuf->paSegs[0].cbSeg, rc));
|
---|
1739 | }
|
---|
1740 | else
|
---|
1741 | {
|
---|
1742 | PRTFSEXTINODE pInode = pThis->pInode;
|
---|
1743 | if (off >= pInode->ObjInfo.cbObject)
|
---|
1744 | {
|
---|
1745 | *pcbRead = 0;
|
---|
1746 | rc = VINF_EOF;
|
---|
1747 | }
|
---|
1748 | else
|
---|
1749 | {
|
---|
1750 | if ((uint64_t)off + cbRead <= (uint64_t)pInode->ObjInfo.cbObject)
|
---|
1751 | rc = rtFsExtInode_Read(pThis->pVol, pThis->pInode, (uint64_t)off, pSgBuf->paSegs[0].pvSeg, cbRead, NULL);
|
---|
1752 | else
|
---|
1753 | {
|
---|
1754 | /* Return VINF_EOF if beyond end-of-file. */
|
---|
1755 | cbRead = (size_t)(pInode->ObjInfo.cbObject - off);
|
---|
1756 | rc = rtFsExtInode_Read(pThis->pVol, pThis->pInode, off, pSgBuf->paSegs[0].pvSeg, cbRead, NULL);
|
---|
1757 | if (RT_SUCCESS(rc))
|
---|
1758 | rc = VINF_EOF;
|
---|
1759 | }
|
---|
1760 | if (RT_SUCCESS(rc))
|
---|
1761 | {
|
---|
1762 | pThis->offFile = off + cbRead;
|
---|
1763 | *pcbRead = cbRead;
|
---|
1764 | }
|
---|
1765 | else
|
---|
1766 | *pcbRead = 0;
|
---|
1767 | }
|
---|
1768 | Log6(("rtFsExtFile_Read: off=%#RX64 cbSeg=%#x -> %Rrc *pcbRead=%#x\n", off, pSgBuf->paSegs[0].cbSeg, rc, *pcbRead));
|
---|
1769 | }
|
---|
1770 |
|
---|
1771 | return rc;
|
---|
1772 | }
|
---|
1773 |
|
---|
1774 |
|
---|
1775 | /**
|
---|
1776 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnWrite}
|
---|
1777 | */
|
---|
1778 | static DECLCALLBACK(int) rtFsExtFile_Write(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten)
|
---|
1779 | {
|
---|
1780 | RT_NOREF(pvThis, off, pSgBuf, fBlocking, pcbWritten);
|
---|
1781 | return VERR_WRITE_PROTECT;
|
---|
1782 | }
|
---|
1783 |
|
---|
1784 |
|
---|
1785 | /**
|
---|
1786 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnFlush}
|
---|
1787 | */
|
---|
1788 | static DECLCALLBACK(int) rtFsExtFile_Flush(void *pvThis)
|
---|
1789 | {
|
---|
1790 | RT_NOREF(pvThis);
|
---|
1791 | return VINF_SUCCESS;
|
---|
1792 | }
|
---|
1793 |
|
---|
1794 |
|
---|
1795 | /**
|
---|
1796 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnTell}
|
---|
1797 | */
|
---|
1798 | static DECLCALLBACK(int) rtFsExtFile_Tell(void *pvThis, PRTFOFF poffActual)
|
---|
1799 | {
|
---|
1800 | PRTFSEXTFILE pThis = (PRTFSEXTFILE)pvThis;
|
---|
1801 | *poffActual = pThis->offFile;
|
---|
1802 | return VINF_SUCCESS;
|
---|
1803 | }
|
---|
1804 |
|
---|
1805 |
|
---|
1806 | /**
|
---|
1807 | * @interface_method_impl{RTVFSOBJSETOPS,pfnMode}
|
---|
1808 | */
|
---|
1809 | static DECLCALLBACK(int) rtFsExtFile_SetMode(void *pvThis, RTFMODE fMode, RTFMODE fMask)
|
---|
1810 | {
|
---|
1811 | RT_NOREF(pvThis, fMode, fMask);
|
---|
1812 | return VERR_WRITE_PROTECT;
|
---|
1813 | }
|
---|
1814 |
|
---|
1815 |
|
---|
1816 | /**
|
---|
1817 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetTimes}
|
---|
1818 | */
|
---|
1819 | static DECLCALLBACK(int) rtFsExtFile_SetTimes(void *pvThis, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
|
---|
1820 | PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
|
---|
1821 | {
|
---|
1822 | RT_NOREF(pvThis, pAccessTime, pModificationTime, pChangeTime, pBirthTime);
|
---|
1823 | return VERR_WRITE_PROTECT;
|
---|
1824 | }
|
---|
1825 |
|
---|
1826 |
|
---|
1827 | /**
|
---|
1828 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetOwner}
|
---|
1829 | */
|
---|
1830 | static DECLCALLBACK(int) rtFsExtFile_SetOwner(void *pvThis, RTUID uid, RTGID gid)
|
---|
1831 | {
|
---|
1832 | RT_NOREF(pvThis, uid, gid);
|
---|
1833 | return VERR_WRITE_PROTECT;
|
---|
1834 | }
|
---|
1835 |
|
---|
1836 |
|
---|
1837 | /**
|
---|
1838 | * @interface_method_impl{RTVFSFILEOPS,pfnSeek}
|
---|
1839 | */
|
---|
1840 | static DECLCALLBACK(int) rtFsExtFile_Seek(void *pvThis, RTFOFF offSeek, unsigned uMethod, PRTFOFF poffActual)
|
---|
1841 | {
|
---|
1842 | PRTFSEXTFILE pThis = (PRTFSEXTFILE)pvThis;
|
---|
1843 | RTFOFF offNew;
|
---|
1844 | switch (uMethod)
|
---|
1845 | {
|
---|
1846 | case RTFILE_SEEK_BEGIN:
|
---|
1847 | offNew = offSeek;
|
---|
1848 | break;
|
---|
1849 | case RTFILE_SEEK_END:
|
---|
1850 | offNew = pThis->pInode->ObjInfo.cbObject + offSeek;
|
---|
1851 | break;
|
---|
1852 | case RTFILE_SEEK_CURRENT:
|
---|
1853 | offNew = (RTFOFF)pThis->offFile + offSeek;
|
---|
1854 | break;
|
---|
1855 | default:
|
---|
1856 | return VERR_INVALID_PARAMETER;
|
---|
1857 | }
|
---|
1858 | if (offNew >= 0)
|
---|
1859 | {
|
---|
1860 | pThis->offFile = offNew;
|
---|
1861 | *poffActual = offNew;
|
---|
1862 | return VINF_SUCCESS;
|
---|
1863 | }
|
---|
1864 | return VERR_NEGATIVE_SEEK;
|
---|
1865 | }
|
---|
1866 |
|
---|
1867 |
|
---|
1868 | /**
|
---|
1869 | * @interface_method_impl{RTVFSFILEOPS,pfnQuerySize}
|
---|
1870 | */
|
---|
1871 | static DECLCALLBACK(int) rtFsExtFile_QuerySize(void *pvThis, uint64_t *pcbFile)
|
---|
1872 | {
|
---|
1873 | PRTFSEXTFILE pThis = (PRTFSEXTFILE)pvThis;
|
---|
1874 | *pcbFile = (uint64_t)pThis->pInode->ObjInfo.cbObject;
|
---|
1875 | return VINF_SUCCESS;
|
---|
1876 | }
|
---|
1877 |
|
---|
1878 |
|
---|
1879 | /**
|
---|
1880 | * @interface_method_impl{RTVFSFILEOPS,pfnSetSize}
|
---|
1881 | */
|
---|
1882 | static DECLCALLBACK(int) rtFsExtFile_SetSize(void *pvThis, uint64_t cbFile, uint32_t fFlags)
|
---|
1883 | {
|
---|
1884 | RT_NOREF(pvThis, cbFile, fFlags);
|
---|
1885 | return VERR_WRITE_PROTECT;
|
---|
1886 | }
|
---|
1887 |
|
---|
1888 |
|
---|
1889 | /**
|
---|
1890 | * @interface_method_impl{RTVFSFILEOPS,pfnQueryMaxSize}
|
---|
1891 | */
|
---|
1892 | static DECLCALLBACK(int) rtFsExtFile_QueryMaxSize(void *pvThis, uint64_t *pcbMax)
|
---|
1893 | {
|
---|
1894 | RT_NOREF(pvThis);
|
---|
1895 | *pcbMax = INT64_MAX; /** @todo */
|
---|
1896 | return VINF_SUCCESS;
|
---|
1897 | }
|
---|
1898 |
|
---|
1899 |
|
---|
1900 | /**
|
---|
1901 | * EXT file operations.
|
---|
1902 | */
|
---|
1903 | static const RTVFSFILEOPS g_rtFsExtFileOps =
|
---|
1904 | {
|
---|
1905 | { /* Stream */
|
---|
1906 | { /* Obj */
|
---|
1907 | RTVFSOBJOPS_VERSION,
|
---|
1908 | RTVFSOBJTYPE_FILE,
|
---|
1909 | "EXT File",
|
---|
1910 | rtFsExtFile_Close,
|
---|
1911 | rtFsExtFile_QueryInfo,
|
---|
1912 | RTVFSOBJOPS_VERSION
|
---|
1913 | },
|
---|
1914 | RTVFSIOSTREAMOPS_VERSION,
|
---|
1915 | RTVFSIOSTREAMOPS_FEAT_NO_SG,
|
---|
1916 | rtFsExtFile_Read,
|
---|
1917 | rtFsExtFile_Write,
|
---|
1918 | rtFsExtFile_Flush,
|
---|
1919 | NULL /*PollOne*/,
|
---|
1920 | rtFsExtFile_Tell,
|
---|
1921 | NULL /*pfnSkip*/,
|
---|
1922 | NULL /*pfnZeroFill*/,
|
---|
1923 | RTVFSIOSTREAMOPS_VERSION,
|
---|
1924 | },
|
---|
1925 | RTVFSFILEOPS_VERSION,
|
---|
1926 | 0,
|
---|
1927 | { /* ObjSet */
|
---|
1928 | RTVFSOBJSETOPS_VERSION,
|
---|
1929 | RT_UOFFSETOF(RTVFSFILEOPS, ObjSet) - RT_UOFFSETOF(RTVFSFILEOPS, Stream.Obj),
|
---|
1930 | rtFsExtFile_SetMode,
|
---|
1931 | rtFsExtFile_SetTimes,
|
---|
1932 | rtFsExtFile_SetOwner,
|
---|
1933 | RTVFSOBJSETOPS_VERSION
|
---|
1934 | },
|
---|
1935 | rtFsExtFile_Seek,
|
---|
1936 | rtFsExtFile_QuerySize,
|
---|
1937 | rtFsExtFile_SetSize,
|
---|
1938 | rtFsExtFile_QueryMaxSize,
|
---|
1939 | RTVFSFILEOPS_VERSION
|
---|
1940 | };
|
---|
1941 |
|
---|
1942 |
|
---|
1943 | /**
|
---|
1944 | * Creates a new VFS file from the given regular file inode.
|
---|
1945 | *
|
---|
1946 | * @returns IPRT status code.
|
---|
1947 | * @param pThis The ext volume instance.
|
---|
1948 | * @param fOpen Open flags passed.
|
---|
1949 | * @param iInode The inode for the file.
|
---|
1950 | * @param phVfsFile Where to store the VFS file handle on success.
|
---|
1951 | * @param pErrInfo Where to record additional error information on error, optional.
|
---|
1952 | * @param pszWhat Logging prefix.
|
---|
1953 | */
|
---|
1954 | static int rtFsExtVol_NewFile(PRTFSEXTVOL pThis, uint64_t fOpen, uint32_t iInode,
|
---|
1955 | PRTVFSFILE phVfsFile, PRTERRINFO pErrInfo, const char *pszWhat)
|
---|
1956 | {
|
---|
1957 | /*
|
---|
1958 | * Load the inode and check that it really is a file.
|
---|
1959 | */
|
---|
1960 | PRTFSEXTINODE pInode = NULL;
|
---|
1961 | int rc = rtFsExtInodeLoad(pThis, iInode, &pInode);
|
---|
1962 | if (RT_SUCCESS(rc))
|
---|
1963 | {
|
---|
1964 | if (RTFS_IS_FILE(pInode->ObjInfo.Attr.fMode))
|
---|
1965 | {
|
---|
1966 | PRTFSEXTFILE pNewFile;
|
---|
1967 | rc = RTVfsNewFile(&g_rtFsExtFileOps, sizeof(*pNewFile), fOpen, pThis->hVfsSelf, NIL_RTVFSLOCK,
|
---|
1968 | phVfsFile, (void **)&pNewFile);
|
---|
1969 | if (RT_SUCCESS(rc))
|
---|
1970 | {
|
---|
1971 | pNewFile->pVol = pThis;
|
---|
1972 | pNewFile->pInode = pInode;
|
---|
1973 | pNewFile->offFile = 0;
|
---|
1974 | }
|
---|
1975 | }
|
---|
1976 | else
|
---|
1977 | rc = RTERRINFO_LOG_SET_F(pErrInfo, VERR_NOT_A_FILE, "%s: fMode=%#RX32", pszWhat, pInode->ObjInfo.Attr.fMode);
|
---|
1978 |
|
---|
1979 | if (RT_FAILURE(rc))
|
---|
1980 | rtFsExtInodeRelease(pThis, pInode);
|
---|
1981 | }
|
---|
1982 |
|
---|
1983 | return rc;
|
---|
1984 | }
|
---|
1985 |
|
---|
1986 |
|
---|
1987 |
|
---|
1988 | /*
|
---|
1989 | *
|
---|
1990 | * EXT directory code.
|
---|
1991 | * EXT directory code.
|
---|
1992 | * EXT directory code.
|
---|
1993 | *
|
---|
1994 | */
|
---|
1995 |
|
---|
1996 | /**
|
---|
1997 | * Looks up an entry in the given directory inode.
|
---|
1998 | *
|
---|
1999 | * @returns IPRT status code.
|
---|
2000 | * @param pThis The ext volume instance.
|
---|
2001 | * @param pInode The directory inode structure to.
|
---|
2002 | * @param pszEntry The entry to lookup.
|
---|
2003 | * @param piInode Where to store the inode number if the entry was found.
|
---|
2004 | */
|
---|
2005 | static int rtFsExtDir_Lookup(PRTFSEXTVOL pThis, PRTFSEXTINODE pInode, const char *pszEntry, uint32_t *piInode)
|
---|
2006 | {
|
---|
2007 | uint64_t offEntry = 0;
|
---|
2008 | int rc = VERR_FILE_NOT_FOUND;
|
---|
2009 | uint32_t idxDirEntry = 0;
|
---|
2010 | size_t cchEntry = strlen(pszEntry);
|
---|
2011 |
|
---|
2012 | if (cchEntry > 255)
|
---|
2013 | return VERR_FILENAME_TOO_LONG;
|
---|
2014 |
|
---|
2015 | while (offEntry < (uint64_t)pInode->ObjInfo.cbObject)
|
---|
2016 | {
|
---|
2017 | EXTDIRENTRYEX DirEntry;
|
---|
2018 | size_t cbThis = RT_MIN(sizeof(DirEntry), (uint64_t)pInode->ObjInfo.cbObject - offEntry);
|
---|
2019 | int rc2 = rtFsExtInode_Read(pThis, pInode, offEntry, &DirEntry, cbThis, NULL);
|
---|
2020 | if (RT_SUCCESS(rc2))
|
---|
2021 | {
|
---|
2022 | #ifdef LOG_ENABLED
|
---|
2023 | rtFsExtDirEntry_Log(pThis, idxDirEntry, &DirEntry);
|
---|
2024 | #endif
|
---|
2025 |
|
---|
2026 | uint16_t cbName = pThis->fFeaturesIncompat & EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE
|
---|
2027 | ? DirEntry.Core.u.v2.cbName
|
---|
2028 | : RT_LE2H_U16(DirEntry.Core.u.v1.cbName);
|
---|
2029 | if ( cchEntry == cbName
|
---|
2030 | && !memcmp(pszEntry, &DirEntry.Core.achName[0], cchEntry))
|
---|
2031 | {
|
---|
2032 | *piInode = RT_LE2H_U32(DirEntry.Core.iInodeRef);
|
---|
2033 | rc = VINF_SUCCESS;
|
---|
2034 | break;
|
---|
2035 | }
|
---|
2036 |
|
---|
2037 | offEntry += RT_LE2H_U16(DirEntry.Core.cbRecord);
|
---|
2038 | idxDirEntry++;
|
---|
2039 | }
|
---|
2040 | else
|
---|
2041 | {
|
---|
2042 | rc = rc2;
|
---|
2043 | break;
|
---|
2044 | }
|
---|
2045 | }
|
---|
2046 |
|
---|
2047 | return rc;
|
---|
2048 | }
|
---|
2049 |
|
---|
2050 |
|
---|
2051 |
|
---|
2052 | /*
|
---|
2053 | *
|
---|
2054 | * Directory instance methods
|
---|
2055 | * Directory instance methods
|
---|
2056 | * Directory instance methods
|
---|
2057 | *
|
---|
2058 | */
|
---|
2059 |
|
---|
2060 | /**
|
---|
2061 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
2062 | */
|
---|
2063 | static DECLCALLBACK(int) rtFsExtDir_Close(void *pvThis)
|
---|
2064 | {
|
---|
2065 | PRTFSEXTDIR pThis = (PRTFSEXTDIR)pvThis;
|
---|
2066 | LogFlowFunc(("pThis=%p\n", pThis));
|
---|
2067 | rtFsExtInodeRelease(pThis->pVol, pThis->pInode);
|
---|
2068 | pThis->pInode = NULL;
|
---|
2069 | return VINF_SUCCESS;
|
---|
2070 | }
|
---|
2071 |
|
---|
2072 |
|
---|
2073 | /**
|
---|
2074 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
2075 | */
|
---|
2076 | static DECLCALLBACK(int) rtFsExtDir_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
2077 | {
|
---|
2078 | PRTFSEXTDIR pThis = (PRTFSEXTDIR)pvThis;
|
---|
2079 | LogFlowFunc(("\n"));
|
---|
2080 | return rtFsExtInode_QueryInfo(pThis->pInode, pObjInfo, enmAddAttr);
|
---|
2081 | }
|
---|
2082 |
|
---|
2083 |
|
---|
2084 | /**
|
---|
2085 | * @interface_method_impl{RTVFSOBJSETOPS,pfnMode}
|
---|
2086 | */
|
---|
2087 | static DECLCALLBACK(int) rtFsExtDir_SetMode(void *pvThis, RTFMODE fMode, RTFMODE fMask)
|
---|
2088 | {
|
---|
2089 | LogFlowFunc(("\n"));
|
---|
2090 | RT_NOREF(pvThis, fMode, fMask);
|
---|
2091 | return VERR_WRITE_PROTECT;
|
---|
2092 | }
|
---|
2093 |
|
---|
2094 |
|
---|
2095 | /**
|
---|
2096 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetTimes}
|
---|
2097 | */
|
---|
2098 | static DECLCALLBACK(int) rtFsExtDir_SetTimes(void *pvThis, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
|
---|
2099 | PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
|
---|
2100 | {
|
---|
2101 | LogFlowFunc(("\n"));
|
---|
2102 | RT_NOREF(pvThis, pAccessTime, pModificationTime, pChangeTime, pBirthTime);
|
---|
2103 | return VERR_WRITE_PROTECT;
|
---|
2104 | }
|
---|
2105 |
|
---|
2106 |
|
---|
2107 | /**
|
---|
2108 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetOwner}
|
---|
2109 | */
|
---|
2110 | static DECLCALLBACK(int) rtFsExtDir_SetOwner(void *pvThis, RTUID uid, RTGID gid)
|
---|
2111 | {
|
---|
2112 | LogFlowFunc(("\n"));
|
---|
2113 | RT_NOREF(pvThis, uid, gid);
|
---|
2114 | return VERR_WRITE_PROTECT;
|
---|
2115 | }
|
---|
2116 |
|
---|
2117 |
|
---|
2118 | /**
|
---|
2119 | * @interface_method_impl{RTVFSDIROPS,pfnOpen}
|
---|
2120 | */
|
---|
2121 | static DECLCALLBACK(int) rtFsExtDir_Open(void *pvThis, const char *pszEntry, uint64_t fOpen,
|
---|
2122 | uint32_t fFlags, PRTVFSOBJ phVfsObj)
|
---|
2123 | {
|
---|
2124 | LogFlowFunc(("pszEntry='%s' fOpen=%#RX64 fFlags=%#x\n", pszEntry, fOpen, fFlags));
|
---|
2125 | PRTFSEXTDIR pThis = (PRTFSEXTDIR)pvThis;
|
---|
2126 | PRTFSEXTVOL pVol = pThis->pVol;
|
---|
2127 | int rc = VINF_SUCCESS;
|
---|
2128 |
|
---|
2129 | RT_NOREF(fFlags);
|
---|
2130 |
|
---|
2131 | /*
|
---|
2132 | * We cannot create or replace anything, just open stuff.
|
---|
2133 | */
|
---|
2134 | if ( (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN
|
---|
2135 | || (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN_CREATE)
|
---|
2136 | { /* likely */ }
|
---|
2137 | else
|
---|
2138 | return VERR_WRITE_PROTECT;
|
---|
2139 |
|
---|
2140 | /*
|
---|
2141 | * Lookup the entry.
|
---|
2142 | */
|
---|
2143 | uint32_t iInode = 0;
|
---|
2144 | rc = rtFsExtDir_Lookup(pVol, pThis->pInode, pszEntry, &iInode);
|
---|
2145 | if (RT_SUCCESS(rc))
|
---|
2146 | {
|
---|
2147 | PRTFSEXTINODE pInode = NULL;
|
---|
2148 | rc = rtFsExtInodeLoad(pVol, iInode, &pInode);
|
---|
2149 | if (RT_SUCCESS(rc))
|
---|
2150 | {
|
---|
2151 | if (RTFS_IS_DIRECTORY(pInode->ObjInfo.Attr.fMode))
|
---|
2152 | {
|
---|
2153 | RTVFSDIR hVfsDir;
|
---|
2154 | rc = rtFsExtVol_OpenDirByInode(pVol, iInode, &hVfsDir);
|
---|
2155 | if (RT_SUCCESS(rc))
|
---|
2156 | {
|
---|
2157 | *phVfsObj = RTVfsObjFromDir(hVfsDir);
|
---|
2158 | RTVfsDirRelease(hVfsDir);
|
---|
2159 | AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3);
|
---|
2160 | }
|
---|
2161 | }
|
---|
2162 | else if (RTFS_IS_FILE(pInode->ObjInfo.Attr.fMode))
|
---|
2163 | {
|
---|
2164 | RTVFSFILE hVfsFile;
|
---|
2165 | rc = rtFsExtVol_NewFile(pVol, fOpen, iInode, &hVfsFile, NULL, pszEntry);
|
---|
2166 | if (RT_SUCCESS(rc))
|
---|
2167 | {
|
---|
2168 | *phVfsObj = RTVfsObjFromFile(hVfsFile);
|
---|
2169 | RTVfsFileRelease(hVfsFile);
|
---|
2170 | AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3);
|
---|
2171 | }
|
---|
2172 | }
|
---|
2173 | else
|
---|
2174 | rc = VERR_NOT_SUPPORTED;
|
---|
2175 | }
|
---|
2176 | }
|
---|
2177 |
|
---|
2178 | LogFlow(("rtFsExtDir_Open(%s): returns %Rrc\n", pszEntry, rc));
|
---|
2179 | return rc;
|
---|
2180 | }
|
---|
2181 |
|
---|
2182 |
|
---|
2183 | /**
|
---|
2184 | * @interface_method_impl{RTVFSDIROPS,pfnCreateDir}
|
---|
2185 | */
|
---|
2186 | static DECLCALLBACK(int) rtFsExtDir_CreateDir(void *pvThis, const char *pszSubDir, RTFMODE fMode, PRTVFSDIR phVfsDir)
|
---|
2187 | {
|
---|
2188 | RT_NOREF(pvThis, pszSubDir, fMode, phVfsDir);
|
---|
2189 | LogFlowFunc(("\n"));
|
---|
2190 | return VERR_WRITE_PROTECT;
|
---|
2191 | }
|
---|
2192 |
|
---|
2193 |
|
---|
2194 | /**
|
---|
2195 | * @interface_method_impl{RTVFSDIROPS,pfnOpenSymlink}
|
---|
2196 | */
|
---|
2197 | static DECLCALLBACK(int) rtFsExtDir_OpenSymlink(void *pvThis, const char *pszSymlink, PRTVFSSYMLINK phVfsSymlink)
|
---|
2198 | {
|
---|
2199 | RT_NOREF(pvThis, pszSymlink, phVfsSymlink);
|
---|
2200 | LogFlowFunc(("\n"));
|
---|
2201 | return VERR_NOT_SUPPORTED;
|
---|
2202 | }
|
---|
2203 |
|
---|
2204 |
|
---|
2205 | /**
|
---|
2206 | * @interface_method_impl{RTVFSDIROPS,pfnCreateSymlink}
|
---|
2207 | */
|
---|
2208 | static DECLCALLBACK(int) rtFsExtDir_CreateSymlink(void *pvThis, const char *pszSymlink, const char *pszTarget,
|
---|
2209 | RTSYMLINKTYPE enmType, PRTVFSSYMLINK phVfsSymlink)
|
---|
2210 | {
|
---|
2211 | RT_NOREF(pvThis, pszSymlink, pszTarget, enmType, phVfsSymlink);
|
---|
2212 | LogFlowFunc(("\n"));
|
---|
2213 | return VERR_WRITE_PROTECT;
|
---|
2214 | }
|
---|
2215 |
|
---|
2216 |
|
---|
2217 | /**
|
---|
2218 | * @interface_method_impl{RTVFSDIROPS,pfnUnlinkEntry}
|
---|
2219 | */
|
---|
2220 | static DECLCALLBACK(int) rtFsExtDir_UnlinkEntry(void *pvThis, const char *pszEntry, RTFMODE fType)
|
---|
2221 | {
|
---|
2222 | RT_NOREF(pvThis, pszEntry, fType);
|
---|
2223 | LogFlowFunc(("\n"));
|
---|
2224 | return VERR_WRITE_PROTECT;
|
---|
2225 | }
|
---|
2226 |
|
---|
2227 |
|
---|
2228 | /**
|
---|
2229 | * @interface_method_impl{RTVFSDIROPS,pfnRenameEntry}
|
---|
2230 | */
|
---|
2231 | static DECLCALLBACK(int) rtFsExtDir_RenameEntry(void *pvThis, const char *pszEntry, RTFMODE fType, const char *pszNewName)
|
---|
2232 | {
|
---|
2233 | RT_NOREF(pvThis, pszEntry, fType, pszNewName);
|
---|
2234 | LogFlowFunc(("\n"));
|
---|
2235 | return VERR_WRITE_PROTECT;
|
---|
2236 | }
|
---|
2237 |
|
---|
2238 |
|
---|
2239 | /**
|
---|
2240 | * @interface_method_impl{RTVFSDIROPS,pfnRewindDir}
|
---|
2241 | */
|
---|
2242 | static DECLCALLBACK(int) rtFsExtDir_RewindDir(void *pvThis)
|
---|
2243 | {
|
---|
2244 | PRTFSEXTDIR pThis = (PRTFSEXTDIR)pvThis;
|
---|
2245 | LogFlowFunc(("\n"));
|
---|
2246 |
|
---|
2247 | pThis->fNoMoreFiles = false;
|
---|
2248 | pThis->offEntry = 0;
|
---|
2249 | pThis->idxEntry = 0;
|
---|
2250 | return VINF_SUCCESS;
|
---|
2251 | }
|
---|
2252 |
|
---|
2253 |
|
---|
2254 | /**
|
---|
2255 | * @interface_method_impl{RTVFSDIROPS,pfnReadDir}
|
---|
2256 | */
|
---|
2257 | static DECLCALLBACK(int) rtFsExtDir_ReadDir(void *pvThis, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry,
|
---|
2258 | RTFSOBJATTRADD enmAddAttr)
|
---|
2259 | {
|
---|
2260 | PRTFSEXTDIR pThis = (PRTFSEXTDIR)pvThis;
|
---|
2261 | PRTFSEXTINODE pInode = pThis->pInode;
|
---|
2262 | LogFlowFunc(("\n"));
|
---|
2263 |
|
---|
2264 | if (pThis->fNoMoreFiles)
|
---|
2265 | return VERR_NO_MORE_FILES;
|
---|
2266 |
|
---|
2267 | EXTDIRENTRYEX DirEntry;
|
---|
2268 | size_t cbThis = RT_MIN(sizeof(DirEntry), (uint64_t)pInode->ObjInfo.cbObject - pThis->offEntry);
|
---|
2269 | int rc = rtFsExtInode_Read(pThis->pVol, pInode, pThis->offEntry, &DirEntry, cbThis, NULL);
|
---|
2270 | if (RT_SUCCESS(rc))
|
---|
2271 | {
|
---|
2272 | #ifdef LOG_ENABLED
|
---|
2273 | rtFsExtDirEntry_Log(pThis->pVol, pThis->idxEntry, &DirEntry);
|
---|
2274 | #endif
|
---|
2275 |
|
---|
2276 | /* 0 inode entry means unused entry. */
|
---|
2277 | /** @todo Can there be unused entries somewhere in the middle? */
|
---|
2278 | uint32_t iInodeRef = RT_LE2H_U32(DirEntry.Core.iInodeRef);
|
---|
2279 | if (iInodeRef != 0)
|
---|
2280 | {
|
---|
2281 | uint16_t cbName = pThis->pVol->fFeaturesIncompat & EXT_SB_FEAT_INCOMPAT_DIR_FILETYPE
|
---|
2282 | ? DirEntry.Core.u.v2.cbName
|
---|
2283 | : RT_LE2H_U16(DirEntry.Core.u.v1.cbName);
|
---|
2284 |
|
---|
2285 | if (cbName <= 255)
|
---|
2286 | {
|
---|
2287 | size_t const cbDirEntry = *pcbDirEntry;
|
---|
2288 |
|
---|
2289 | *pcbDirEntry = RT_UOFFSETOF_DYN(RTDIRENTRYEX, szName[cbName + 2]);
|
---|
2290 | if (*pcbDirEntry <= cbDirEntry)
|
---|
2291 | {
|
---|
2292 | /* Load the referenced inode. */
|
---|
2293 | PRTFSEXTINODE pInodeRef;
|
---|
2294 | rc = rtFsExtInodeLoad(pThis->pVol, iInodeRef, &pInodeRef);
|
---|
2295 | if (RT_SUCCESS(rc))
|
---|
2296 | {
|
---|
2297 | memcpy(&pDirEntry->szName[0], &DirEntry.Core.achName[0], cbName);
|
---|
2298 | pDirEntry->szName[cbName] = '\0';
|
---|
2299 | pDirEntry->cbName = cbName;
|
---|
2300 | rc = rtFsExtInode_QueryInfo(pInodeRef, &pDirEntry->Info, enmAddAttr);
|
---|
2301 | if (RT_SUCCESS(rc))
|
---|
2302 | {
|
---|
2303 | pThis->offEntry += RT_LE2H_U16(DirEntry.Core.cbRecord);
|
---|
2304 | pThis->idxEntry++;
|
---|
2305 | rtFsExtInodeRelease(pThis->pVol, pInodeRef);
|
---|
2306 | return VINF_SUCCESS;
|
---|
2307 | }
|
---|
2308 | rtFsExtInodeRelease(pThis->pVol, pInodeRef);
|
---|
2309 | }
|
---|
2310 | }
|
---|
2311 | else
|
---|
2312 | rc = VERR_BUFFER_OVERFLOW;
|
---|
2313 | }
|
---|
2314 | else
|
---|
2315 | rc = VERR_FILENAME_TOO_LONG;
|
---|
2316 | }
|
---|
2317 | else
|
---|
2318 | {
|
---|
2319 | rc = VERR_NO_MORE_FILES;
|
---|
2320 | LogFlowFunc(("no more files\n"));
|
---|
2321 | pThis->fNoMoreFiles = true;
|
---|
2322 | }
|
---|
2323 | }
|
---|
2324 |
|
---|
2325 | return rc;
|
---|
2326 | }
|
---|
2327 |
|
---|
2328 |
|
---|
2329 | /**
|
---|
2330 | * EXT directory operations.
|
---|
2331 | */
|
---|
2332 | static const RTVFSDIROPS g_rtFsExtDirOps =
|
---|
2333 | {
|
---|
2334 | { /* Obj */
|
---|
2335 | RTVFSOBJOPS_VERSION,
|
---|
2336 | RTVFSOBJTYPE_DIR,
|
---|
2337 | "EXT Dir",
|
---|
2338 | rtFsExtDir_Close,
|
---|
2339 | rtFsExtDir_QueryInfo,
|
---|
2340 | RTVFSOBJOPS_VERSION
|
---|
2341 | },
|
---|
2342 | RTVFSDIROPS_VERSION,
|
---|
2343 | 0,
|
---|
2344 | { /* ObjSet */
|
---|
2345 | RTVFSOBJSETOPS_VERSION,
|
---|
2346 | RT_UOFFSETOF(RTVFSDIROPS, ObjSet) - RT_UOFFSETOF(RTVFSDIROPS, Obj),
|
---|
2347 | rtFsExtDir_SetMode,
|
---|
2348 | rtFsExtDir_SetTimes,
|
---|
2349 | rtFsExtDir_SetOwner,
|
---|
2350 | RTVFSOBJSETOPS_VERSION
|
---|
2351 | },
|
---|
2352 | rtFsExtDir_Open,
|
---|
2353 | NULL /* pfnFollowAbsoluteSymlink */,
|
---|
2354 | NULL /* pfnOpenFile */,
|
---|
2355 | NULL /* pfnOpenDir */,
|
---|
2356 | rtFsExtDir_CreateDir,
|
---|
2357 | rtFsExtDir_OpenSymlink,
|
---|
2358 | rtFsExtDir_CreateSymlink,
|
---|
2359 | NULL /* pfnQueryEntryInfo */,
|
---|
2360 | rtFsExtDir_UnlinkEntry,
|
---|
2361 | rtFsExtDir_RenameEntry,
|
---|
2362 | rtFsExtDir_RewindDir,
|
---|
2363 | rtFsExtDir_ReadDir,
|
---|
2364 | RTVFSDIROPS_VERSION,
|
---|
2365 | };
|
---|
2366 |
|
---|
2367 |
|
---|
2368 | /**
|
---|
2369 | * Opens a directory by the given inode.
|
---|
2370 | *
|
---|
2371 | * @returns IPRT status code.
|
---|
2372 | * @param pThis The ext volume instance.
|
---|
2373 | * @param iInode The inode to open.
|
---|
2374 | * @param phVfsDir Where to store the handle to the VFS directory on success.
|
---|
2375 | */
|
---|
2376 | static int rtFsExtVol_OpenDirByInode(PRTFSEXTVOL pThis, uint32_t iInode, PRTVFSDIR phVfsDir)
|
---|
2377 | {
|
---|
2378 | PRTFSEXTINODE pInode = NULL;
|
---|
2379 | int rc = rtFsExtInodeLoad(pThis, iInode, &pInode);
|
---|
2380 | if (RT_SUCCESS(rc))
|
---|
2381 | {
|
---|
2382 | if (RTFS_IS_DIRECTORY(pInode->ObjInfo.Attr.fMode))
|
---|
2383 | {
|
---|
2384 | PRTFSEXTDIR pNewDir;
|
---|
2385 | rc = RTVfsNewDir(&g_rtFsExtDirOps, sizeof(*pNewDir), 0 /*fFlags*/, pThis->hVfsSelf, NIL_RTVFSLOCK,
|
---|
2386 | phVfsDir, (void **)&pNewDir);
|
---|
2387 | if (RT_SUCCESS(rc))
|
---|
2388 | {
|
---|
2389 | pNewDir->fNoMoreFiles = false;
|
---|
2390 | pNewDir->pVol = pThis;
|
---|
2391 | pNewDir->pInode = pInode;
|
---|
2392 | }
|
---|
2393 | }
|
---|
2394 | else
|
---|
2395 | rc = VERR_VFS_BOGUS_FORMAT;
|
---|
2396 |
|
---|
2397 | if (RT_FAILURE(rc))
|
---|
2398 | rtFsExtInodeRelease(pThis, pInode);
|
---|
2399 | }
|
---|
2400 |
|
---|
2401 | return rc;
|
---|
2402 | }
|
---|
2403 |
|
---|
2404 |
|
---|
2405 |
|
---|
2406 | /*
|
---|
2407 | *
|
---|
2408 | * Volume level code.
|
---|
2409 | * Volume level code.
|
---|
2410 | * Volume level code.
|
---|
2411 | *
|
---|
2412 | */
|
---|
2413 |
|
---|
2414 | /**
|
---|
2415 | * Checks whether the block range in the given block group is in use by checking the
|
---|
2416 | * block bitmap.
|
---|
2417 | *
|
---|
2418 | * @returns Flag whether the range is in use.
|
---|
2419 | * @param pBlkGrpDesc The block group to check for.
|
---|
2420 | * @param iBlockStart The starting block to check relative from the beginning of the block group.
|
---|
2421 | * @param cBlocks How many blocks to check.
|
---|
2422 | */
|
---|
2423 | static bool rtFsExtIsBlockRangeInUse(PRTFSEXTBLKGRP pBlkGrpDesc, uint64_t iBlockStart, size_t cBlocks)
|
---|
2424 | {
|
---|
2425 | /** @todo Optimize with ASMBitFirstSet(). */
|
---|
2426 | while (cBlocks)
|
---|
2427 | {
|
---|
2428 | uint32_t idxByte = iBlockStart / 8;
|
---|
2429 | uint32_t iBit = iBlockStart % 8;
|
---|
2430 |
|
---|
2431 | if (pBlkGrpDesc->abBlockBitmap[idxByte] & RT_BIT(iBit))
|
---|
2432 | return true;
|
---|
2433 |
|
---|
2434 | cBlocks--;
|
---|
2435 | iBlockStart++;
|
---|
2436 | }
|
---|
2437 |
|
---|
2438 | return false;
|
---|
2439 | }
|
---|
2440 |
|
---|
2441 |
|
---|
2442 | static DECLCALLBACK(int) rtFsExtVolBlockGroupTreeDestroy(PAVLU32NODECORE pCore, void *pvUser)
|
---|
2443 | {
|
---|
2444 | RT_NOREF(pvUser);
|
---|
2445 |
|
---|
2446 | PRTFSEXTBLKGRP pBlockGroup = (PRTFSEXTBLKGRP)pCore;
|
---|
2447 | Assert(!pBlockGroup->cRefs);
|
---|
2448 | RTMemFree(pBlockGroup);
|
---|
2449 | return VINF_SUCCESS;
|
---|
2450 | }
|
---|
2451 |
|
---|
2452 |
|
---|
2453 | static DECLCALLBACK(int) rtFsExtVolInodeTreeDestroy(PAVLU32NODECORE pCore, void *pvUser)
|
---|
2454 | {
|
---|
2455 | RT_NOREF(pvUser);
|
---|
2456 |
|
---|
2457 | PRTFSEXTINODE pInode = (PRTFSEXTINODE)pCore;
|
---|
2458 | Assert(!pInode->cRefs);
|
---|
2459 | RTMemFree(pInode);
|
---|
2460 | return VINF_SUCCESS;
|
---|
2461 | }
|
---|
2462 |
|
---|
2463 |
|
---|
2464 | static DECLCALLBACK(int) rtFsExtVolBlockTreeDestroy(PAVLU64NODECORE pCore, void *pvUser)
|
---|
2465 | {
|
---|
2466 | RT_NOREF(pvUser);
|
---|
2467 |
|
---|
2468 | PRTFSEXTBLOCKENTRY pBlock = (PRTFSEXTBLOCKENTRY)pCore;
|
---|
2469 | Assert(!pBlock->cRefs);
|
---|
2470 | RTMemFree(pBlock);
|
---|
2471 | return VINF_SUCCESS;
|
---|
2472 | }
|
---|
2473 |
|
---|
2474 |
|
---|
2475 | /**
|
---|
2476 | * @interface_method_impl{RTVFSOBJOPS::Obj,pfnClose}
|
---|
2477 | */
|
---|
2478 | static DECLCALLBACK(int) rtFsExtVol_Close(void *pvThis)
|
---|
2479 | {
|
---|
2480 | PRTFSEXTVOL pThis = (PRTFSEXTVOL)pvThis;
|
---|
2481 |
|
---|
2482 | /* Destroy the block group tree. */
|
---|
2483 | RTAvlU32Destroy(&pThis->BlockGroupRoot, rtFsExtVolBlockGroupTreeDestroy, pThis);
|
---|
2484 | pThis->BlockGroupRoot = NULL;
|
---|
2485 | RTListInit(&pThis->LstBlockGroupLru);
|
---|
2486 |
|
---|
2487 | /* Destroy the inode tree. */
|
---|
2488 | RTAvlU32Destroy(&pThis->InodeRoot, rtFsExtVolInodeTreeDestroy, pThis);
|
---|
2489 | pThis->InodeRoot = NULL;
|
---|
2490 | RTListInit(&pThis->LstInodeLru);
|
---|
2491 |
|
---|
2492 | /* Destroy the block cache tree. */
|
---|
2493 | RTAvlU64Destroy(&pThis->BlockRoot, rtFsExtVolBlockTreeDestroy, pThis);
|
---|
2494 | pThis->BlockRoot = NULL;
|
---|
2495 | RTListInit(&pThis->LstBlockLru);
|
---|
2496 |
|
---|
2497 | /*
|
---|
2498 | * Backing file and handles.
|
---|
2499 | */
|
---|
2500 | RTVfsFileRelease(pThis->hVfsBacking);
|
---|
2501 | pThis->hVfsBacking = NIL_RTVFSFILE;
|
---|
2502 | pThis->hVfsSelf = NIL_RTVFS;
|
---|
2503 |
|
---|
2504 | return VINF_SUCCESS;
|
---|
2505 | }
|
---|
2506 |
|
---|
2507 |
|
---|
2508 | /**
|
---|
2509 | * @interface_method_impl{RTVFSOBJOPS::Obj,pfnQueryInfo}
|
---|
2510 | */
|
---|
2511 | static DECLCALLBACK(int) rtFsExtVol_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
2512 | {
|
---|
2513 | RT_NOREF(pvThis, pObjInfo, enmAddAttr);
|
---|
2514 | return VERR_WRONG_TYPE;
|
---|
2515 | }
|
---|
2516 |
|
---|
2517 |
|
---|
2518 | /**
|
---|
2519 | * @interface_method_impl{RTVFSOBJOPS::Obj,pfnOpenRoot}
|
---|
2520 | */
|
---|
2521 | static DECLCALLBACK(int) rtFsExtVol_OpenRoot(void *pvThis, PRTVFSDIR phVfsDir)
|
---|
2522 | {
|
---|
2523 | PRTFSEXTVOL pThis = (PRTFSEXTVOL)pvThis;
|
---|
2524 | int rc = rtFsExtVol_OpenDirByInode(pThis, EXT_INODE_NR_ROOT_DIR, phVfsDir);
|
---|
2525 | LogFlowFunc(("returns %Rrc\n", rc));
|
---|
2526 | return rc;
|
---|
2527 | }
|
---|
2528 |
|
---|
2529 |
|
---|
2530 | /**
|
---|
2531 | * @interface_method_impl{RTVFSOBJOPS::Obj,pfnQueryRangeState}
|
---|
2532 | */
|
---|
2533 | static DECLCALLBACK(int) rtFsExtVol_QueryRangeState(void *pvThis, uint64_t off, size_t cb, bool *pfUsed)
|
---|
2534 | {
|
---|
2535 | int rc = VINF_SUCCESS;
|
---|
2536 | PRTFSEXTVOL pThis = (PRTFSEXTVOL)pvThis;
|
---|
2537 |
|
---|
2538 | *pfUsed = false;
|
---|
2539 |
|
---|
2540 | uint64_t iBlock = rtFsExtDiskOffsetToBlockIdx(pThis, off);
|
---|
2541 | uint64_t cBlocks = rtFsExtDiskOffsetToBlockIdx(pThis, cb) + (cb % pThis->cbBlock ? 1 : 0);
|
---|
2542 | while (cBlocks > 0)
|
---|
2543 | {
|
---|
2544 | uint32_t const iBlockGroup = iBlock / pThis->cBlocksPerGroup;
|
---|
2545 | uint32_t const iBlockRelStart = iBlock - iBlockGroup * pThis->cBlocksPerGroup;
|
---|
2546 | PRTFSEXTBLKGRP pBlockGroup = NULL;
|
---|
2547 |
|
---|
2548 | rc = rtFsExtBlockGroupLoad(pThis, iBlockGroup, &pBlockGroup);
|
---|
2549 | if (RT_FAILURE(rc))
|
---|
2550 | break;
|
---|
2551 |
|
---|
2552 | uint64_t cBlocksThis = RT_MIN(cBlocks, iBlockRelStart - pThis->cBlocksPerGroup);
|
---|
2553 | if (rtFsExtIsBlockRangeInUse(pBlockGroup, iBlockRelStart, cBlocksThis))
|
---|
2554 | {
|
---|
2555 | *pfUsed = true;
|
---|
2556 | break;
|
---|
2557 | }
|
---|
2558 |
|
---|
2559 | rtFsExtBlockGroupRelease(pThis, pBlockGroup);
|
---|
2560 | cBlocks -= cBlocksThis;
|
---|
2561 | iBlock += cBlocksThis;
|
---|
2562 | }
|
---|
2563 |
|
---|
2564 | return rc;
|
---|
2565 | }
|
---|
2566 |
|
---|
2567 |
|
---|
2568 | DECL_HIDDEN_CONST(const RTVFSOPS) g_rtFsExtVolOps =
|
---|
2569 | {
|
---|
2570 | /* .Obj = */
|
---|
2571 | {
|
---|
2572 | /* .uVersion = */ RTVFSOBJOPS_VERSION,
|
---|
2573 | /* .enmType = */ RTVFSOBJTYPE_VFS,
|
---|
2574 | /* .pszName = */ "ExtVol",
|
---|
2575 | /* .pfnClose = */ rtFsExtVol_Close,
|
---|
2576 | /* .pfnQueryInfo = */ rtFsExtVol_QueryInfo,
|
---|
2577 | /* .uEndMarker = */ RTVFSOBJOPS_VERSION
|
---|
2578 | },
|
---|
2579 | /* .uVersion = */ RTVFSOPS_VERSION,
|
---|
2580 | /* .fFeatures = */ 0,
|
---|
2581 | /* .pfnOpenRoot = */ rtFsExtVol_OpenRoot,
|
---|
2582 | /* .pfnQueryRangeState = */ rtFsExtVol_QueryRangeState,
|
---|
2583 | /* .uEndMarker = */ RTVFSOPS_VERSION
|
---|
2584 | };
|
---|
2585 |
|
---|
2586 |
|
---|
2587 |
|
---|
2588 | /**
|
---|
2589 | * Loads the parameters from the given original ext2 format superblock (EXT_SB_REV_ORIG).
|
---|
2590 | *
|
---|
2591 | * @returns IPRT status code.
|
---|
2592 | * @param pThis The ext volume instance.
|
---|
2593 | * @param pSb The superblock to load.
|
---|
2594 | * @param pErrInfo Where to return additional error info.
|
---|
2595 | */
|
---|
2596 | static int rtFsExtVolLoadAndParseSuperBlockV0(PRTFSEXTVOL pThis, PCEXTSUPERBLOCK pSb, PRTERRINFO pErrInfo)
|
---|
2597 | {
|
---|
2598 | RT_NOREF(pErrInfo);
|
---|
2599 |
|
---|
2600 | /*
|
---|
2601 | * Linux never supported a differing cluster (also called fragment) size for
|
---|
2602 | * the original ext2 layout so we reject such filesystems as it is not clear what
|
---|
2603 | * the purpose is really.
|
---|
2604 | */
|
---|
2605 | if (RT_LE2H_U32(pSb->cLogBlockSize) != RT_LE2H_U32(pSb->cLogClusterSize))
|
---|
2606 | return RTERRINFO_LOG_SET_F(pErrInfo, VERR_VFS_UNSUPPORTED_FORMAT, "EXT filesystem cluster and block size differ");
|
---|
2607 |
|
---|
2608 | pThis->f64Bit = false;
|
---|
2609 | pThis->cBlockShift = 10 + RT_LE2H_U32(pSb->cLogBlockSize);
|
---|
2610 | pThis->cbBlock = UINT64_C(1) << pThis->cBlockShift;
|
---|
2611 | pThis->cbInode = sizeof(EXTINODE);
|
---|
2612 | pThis->cbBlkGrpDesc = sizeof(EXTBLOCKGROUPDESC32);
|
---|
2613 | pThis->cBlocksPerGroup = RT_LE2H_U32(pSb->cBlocksPerGroup);
|
---|
2614 | pThis->cInodesPerGroup = RT_LE2H_U32(pSb->cInodesPerBlockGroup);
|
---|
2615 | pThis->cBlockGroups = RT_LE2H_U32(pSb->cBlocksTotalLow) / pThis->cBlocksPerGroup;
|
---|
2616 | pThis->cbBlockBitmap = pThis->cBlocksPerGroup / 8;
|
---|
2617 | if (pThis->cBlocksPerGroup % 8)
|
---|
2618 | pThis->cbBlockBitmap++;
|
---|
2619 | pThis->cbInodeBitmap = pThis->cInodesPerGroup / 8;
|
---|
2620 | if (pThis->cInodesPerGroup % 8)
|
---|
2621 | pThis->cbInodeBitmap++;
|
---|
2622 |
|
---|
2623 | return VINF_SUCCESS;
|
---|
2624 | }
|
---|
2625 |
|
---|
2626 |
|
---|
2627 | /**
|
---|
2628 | * Loads the parameters from the given ext superblock (EXT_SB_REV_V2_DYN_INODE_SZ).
|
---|
2629 | *
|
---|
2630 | * @returns IPRT status code.
|
---|
2631 | * @param pThis The ext volume instance.
|
---|
2632 | * @param pSb The superblock to load.
|
---|
2633 | * @param pErrInfo Where to return additional error info.
|
---|
2634 | */
|
---|
2635 | static int rtFsExtVolLoadAndParseSuperBlockV1(PRTFSEXTVOL pThis, PCEXTSUPERBLOCK pSb, PRTERRINFO pErrInfo)
|
---|
2636 | {
|
---|
2637 | if ((RT_LE2H_U32(pSb->fFeaturesIncompat) & ~RTFSEXT_INCOMPAT_FEATURES_SUPP) != 0)
|
---|
2638 | return RTERRINFO_LOG_SET_F(pErrInfo, VERR_VFS_UNSUPPORTED_FORMAT, "EXT filesystem contains unsupported incompatible features: %RX32",
|
---|
2639 | RT_LE2H_U32(pSb->fFeaturesIncompat) & ~RTFSEXT_INCOMPAT_FEATURES_SUPP);
|
---|
2640 | if ( RT_LE2H_U32(pSb->fFeaturesCompatRo) != 0
|
---|
2641 | && !(pThis->fMntFlags & RTVFSMNT_F_READ_ONLY))
|
---|
2642 | return RTERRINFO_LOG_SET_F(pErrInfo, VERR_VFS_UNSUPPORTED_FORMAT, "EXT filesystem contains unsupported readonly features: %RX32",
|
---|
2643 | RT_LE2H_U32(pSb->fFeaturesCompatRo));
|
---|
2644 |
|
---|
2645 | pThis->fFeaturesIncompat = RT_LE2H_U32(pSb->fFeaturesIncompat);
|
---|
2646 | pThis->f64Bit = RT_BOOL(pThis->fFeaturesIncompat & EXT_SB_FEAT_INCOMPAT_64BIT);
|
---|
2647 | pThis->cBlockShift = 10 + RT_LE2H_U32(pSb->cLogBlockSize);
|
---|
2648 | pThis->cbBlock = UINT64_C(1) << pThis->cBlockShift;
|
---|
2649 | pThis->cbInode = RT_LE2H_U16(pSb->cbInode);
|
---|
2650 | pThis->cbBlkGrpDesc = pThis->f64Bit ? RT_LE2H_U16(pSb->cbGroupDesc) : sizeof(EXTBLOCKGROUPDESC32);
|
---|
2651 | pThis->cBlocksPerGroup = RT_LE2H_U32(pSb->cBlocksPerGroup);
|
---|
2652 | pThis->cInodesPerGroup = RT_LE2H_U32(pSb->cInodesPerBlockGroup);
|
---|
2653 | pThis->cBlockGroups = RT_LE2H_U32(pSb->cBlocksTotalLow) / pThis->cBlocksPerGroup;
|
---|
2654 | pThis->cbBlockBitmap = pThis->cBlocksPerGroup / 8;
|
---|
2655 | if (pThis->cBlocksPerGroup % 8)
|
---|
2656 | pThis->cbBlockBitmap++;
|
---|
2657 | pThis->cbInodeBitmap = pThis->cInodesPerGroup / 8;
|
---|
2658 | if (pThis->cInodesPerGroup % 8)
|
---|
2659 | pThis->cbInodeBitmap++;
|
---|
2660 |
|
---|
2661 | return VINF_SUCCESS;
|
---|
2662 | }
|
---|
2663 |
|
---|
2664 |
|
---|
2665 | /**
|
---|
2666 | * Loads and parses the superblock of the filesystem.
|
---|
2667 | *
|
---|
2668 | * @returns IPRT status code.
|
---|
2669 | * @param pThis The ext volume instance.
|
---|
2670 | * @param pErrInfo Where to return additional error info.
|
---|
2671 | */
|
---|
2672 | static int rtFsExtVolLoadAndParseSuperblock(PRTFSEXTVOL pThis, PRTERRINFO pErrInfo)
|
---|
2673 | {
|
---|
2674 | int rc = VINF_SUCCESS;
|
---|
2675 | EXTSUPERBLOCK Sb;
|
---|
2676 | rc = RTVfsFileReadAt(pThis->hVfsBacking, EXT_SB_OFFSET, &Sb, sizeof(EXTSUPERBLOCK), NULL);
|
---|
2677 | if (RT_FAILURE(rc))
|
---|
2678 | return RTERRINFO_LOG_SET(pErrInfo, rc, "Error reading super block");
|
---|
2679 |
|
---|
2680 | /* Validate the superblock. */
|
---|
2681 | if (RT_LE2H_U16(Sb.u16Signature) != EXT_SB_SIGNATURE)
|
---|
2682 | return RTERRINFO_LOG_SET_F(pErrInfo, VERR_VFS_UNKNOWN_FORMAT, "Not EXT - Signature mismatch: %RX16", RT_LE2H_U16(Sb.u16Signature));
|
---|
2683 |
|
---|
2684 | #ifdef LOG_ENABLED
|
---|
2685 | rtFsExtSb_Log(&Sb);
|
---|
2686 | #endif
|
---|
2687 |
|
---|
2688 | if (RT_LE2H_U16(Sb.u16FilesystemState) == EXT_SB_STATE_ERRORS)
|
---|
2689 | return RTERRINFO_LOG_SET(pErrInfo, VERR_VFS_UNSUPPORTED_FORMAT, "EXT filesystem contains errors");
|
---|
2690 |
|
---|
2691 | if (RT_LE2H_U32(Sb.u32RevLvl) == EXT_SB_REV_ORIG)
|
---|
2692 | rc = rtFsExtVolLoadAndParseSuperBlockV0(pThis, &Sb, pErrInfo);
|
---|
2693 | else
|
---|
2694 | rc = rtFsExtVolLoadAndParseSuperBlockV1(pThis, &Sb, pErrInfo);
|
---|
2695 |
|
---|
2696 | return rc;
|
---|
2697 | }
|
---|
2698 |
|
---|
2699 |
|
---|
2700 | RTDECL(int) RTFsExtVolOpen(RTVFSFILE hVfsFileIn, uint32_t fMntFlags, uint32_t fExtFlags, PRTVFS phVfs, PRTERRINFO pErrInfo)
|
---|
2701 | {
|
---|
2702 | AssertPtrReturn(phVfs, VERR_INVALID_POINTER);
|
---|
2703 | AssertReturn(!(fMntFlags & ~RTVFSMNT_F_VALID_MASK), VERR_INVALID_FLAGS);
|
---|
2704 | AssertReturn(!fExtFlags, VERR_INVALID_FLAGS);
|
---|
2705 |
|
---|
2706 | uint32_t cRefs = RTVfsFileRetain(hVfsFileIn);
|
---|
2707 | AssertReturn(cRefs != UINT32_MAX, VERR_INVALID_HANDLE);
|
---|
2708 |
|
---|
2709 | /*
|
---|
2710 | * Create a VFS instance and initialize the data so rtFsExtVol_Close works.
|
---|
2711 | */
|
---|
2712 | RTVFS hVfs;
|
---|
2713 | PRTFSEXTVOL pThis;
|
---|
2714 | int rc = RTVfsNew(&g_rtFsExtVolOps, sizeof(*pThis), NIL_RTVFS, RTVFSLOCK_CREATE_RW, &hVfs, (void **)&pThis);
|
---|
2715 | if (RT_SUCCESS(rc))
|
---|
2716 | {
|
---|
2717 | pThis->hVfsBacking = hVfsFileIn;
|
---|
2718 | pThis->hVfsSelf = hVfs;
|
---|
2719 | pThis->fMntFlags = fMntFlags;
|
---|
2720 | pThis->fExtFlags = fExtFlags;
|
---|
2721 | pThis->BlockGroupRoot = NULL;
|
---|
2722 | pThis->InodeRoot = NULL;
|
---|
2723 | pThis->BlockRoot = NULL;
|
---|
2724 | pThis->cbBlockGroups = 0;
|
---|
2725 | pThis->cbInodes = 0;
|
---|
2726 | pThis->cbBlocks = 0;
|
---|
2727 | RTListInit(&pThis->LstBlockGroupLru);
|
---|
2728 | RTListInit(&pThis->LstInodeLru);
|
---|
2729 | RTListInit(&pThis->LstBlockLru);
|
---|
2730 |
|
---|
2731 | rc = RTVfsFileQuerySize(pThis->hVfsBacking, &pThis->cbBacking);
|
---|
2732 | if (RT_SUCCESS(rc))
|
---|
2733 | {
|
---|
2734 | rc = rtFsExtVolLoadAndParseSuperblock(pThis, pErrInfo);
|
---|
2735 | if (RT_SUCCESS(rc))
|
---|
2736 | {
|
---|
2737 | *phVfs = hVfs;
|
---|
2738 | return VINF_SUCCESS;
|
---|
2739 | }
|
---|
2740 | }
|
---|
2741 |
|
---|
2742 | RTVfsRelease(hVfs);
|
---|
2743 | *phVfs = NIL_RTVFS;
|
---|
2744 | }
|
---|
2745 | else
|
---|
2746 | RTVfsFileRelease(hVfsFileIn);
|
---|
2747 |
|
---|
2748 | return rc;
|
---|
2749 | }
|
---|
2750 |
|
---|
2751 |
|
---|
2752 | /**
|
---|
2753 | * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnValidate}
|
---|
2754 | */
|
---|
2755 | static DECLCALLBACK(int) rtVfsChainExtVol_Validate(PCRTVFSCHAINELEMENTREG pProviderReg, PRTVFSCHAINSPEC pSpec,
|
---|
2756 | PRTVFSCHAINELEMSPEC pElement, uint32_t *poffError, PRTERRINFO pErrInfo)
|
---|
2757 | {
|
---|
2758 | RT_NOREF(pProviderReg);
|
---|
2759 |
|
---|
2760 | /*
|
---|
2761 | * Basic checks.
|
---|
2762 | */
|
---|
2763 | if (pElement->enmTypeIn != RTVFSOBJTYPE_FILE)
|
---|
2764 | return pElement->enmTypeIn == RTVFSOBJTYPE_INVALID ? VERR_VFS_CHAIN_CANNOT_BE_FIRST_ELEMENT : VERR_VFS_CHAIN_TAKES_FILE;
|
---|
2765 | if ( pElement->enmType != RTVFSOBJTYPE_VFS
|
---|
2766 | && pElement->enmType != RTVFSOBJTYPE_DIR)
|
---|
2767 | return VERR_VFS_CHAIN_ONLY_DIR_OR_VFS;
|
---|
2768 | if (pElement->cArgs > 1)
|
---|
2769 | return VERR_VFS_CHAIN_AT_MOST_ONE_ARG;
|
---|
2770 |
|
---|
2771 | /*
|
---|
2772 | * Parse the flag if present, save in pElement->uProvider.
|
---|
2773 | */
|
---|
2774 | bool fReadOnly = (pSpec->fOpenFile & RTFILE_O_ACCESS_MASK) == RTFILE_O_READ;
|
---|
2775 | if (pElement->cArgs > 0)
|
---|
2776 | {
|
---|
2777 | const char *psz = pElement->paArgs[0].psz;
|
---|
2778 | if (*psz)
|
---|
2779 | {
|
---|
2780 | if (!strcmp(psz, "ro"))
|
---|
2781 | fReadOnly = true;
|
---|
2782 | else if (!strcmp(psz, "rw"))
|
---|
2783 | fReadOnly = false;
|
---|
2784 | else
|
---|
2785 | {
|
---|
2786 | *poffError = pElement->paArgs[0].offSpec;
|
---|
2787 | return RTErrInfoSet(pErrInfo, VERR_VFS_CHAIN_INVALID_ARGUMENT, "Expected 'ro' or 'rw' as argument");
|
---|
2788 | }
|
---|
2789 | }
|
---|
2790 | }
|
---|
2791 |
|
---|
2792 | pElement->uProvider = fReadOnly ? RTVFSMNT_F_READ_ONLY : 0;
|
---|
2793 | return VINF_SUCCESS;
|
---|
2794 | }
|
---|
2795 |
|
---|
2796 |
|
---|
2797 | /**
|
---|
2798 | * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnInstantiate}
|
---|
2799 | */
|
---|
2800 | static DECLCALLBACK(int) rtVfsChainExtVol_Instantiate(PCRTVFSCHAINELEMENTREG pProviderReg, PCRTVFSCHAINSPEC pSpec,
|
---|
2801 | PCRTVFSCHAINELEMSPEC pElement, RTVFSOBJ hPrevVfsObj,
|
---|
2802 | PRTVFSOBJ phVfsObj, uint32_t *poffError, PRTERRINFO pErrInfo)
|
---|
2803 | {
|
---|
2804 | RT_NOREF(pProviderReg, pSpec, poffError);
|
---|
2805 |
|
---|
2806 | int rc;
|
---|
2807 | RTVFSFILE hVfsFileIn = RTVfsObjToFile(hPrevVfsObj);
|
---|
2808 | if (hVfsFileIn != NIL_RTVFSFILE)
|
---|
2809 | {
|
---|
2810 | RTVFS hVfs;
|
---|
2811 | rc = RTFsExtVolOpen(hVfsFileIn, (uint32_t)pElement->uProvider, (uint32_t)(pElement->uProvider >> 32), &hVfs, pErrInfo);
|
---|
2812 | RTVfsFileRelease(hVfsFileIn);
|
---|
2813 | if (RT_SUCCESS(rc))
|
---|
2814 | {
|
---|
2815 | *phVfsObj = RTVfsObjFromVfs(hVfs);
|
---|
2816 | RTVfsRelease(hVfs);
|
---|
2817 | if (*phVfsObj != NIL_RTVFSOBJ)
|
---|
2818 | return VINF_SUCCESS;
|
---|
2819 | rc = VERR_VFS_CHAIN_CAST_FAILED;
|
---|
2820 | }
|
---|
2821 | }
|
---|
2822 | else
|
---|
2823 | rc = VERR_VFS_CHAIN_CAST_FAILED;
|
---|
2824 | return rc;
|
---|
2825 | }
|
---|
2826 |
|
---|
2827 |
|
---|
2828 | /**
|
---|
2829 | * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnCanReuseElement}
|
---|
2830 | */
|
---|
2831 | static DECLCALLBACK(bool) rtVfsChainExtVol_CanReuseElement(PCRTVFSCHAINELEMENTREG pProviderReg,
|
---|
2832 | PCRTVFSCHAINSPEC pSpec, PCRTVFSCHAINELEMSPEC pElement,
|
---|
2833 | PCRTVFSCHAINSPEC pReuseSpec, PCRTVFSCHAINELEMSPEC pReuseElement)
|
---|
2834 | {
|
---|
2835 | RT_NOREF(pProviderReg, pSpec, pReuseSpec);
|
---|
2836 | if ( pElement->paArgs[0].uProvider == pReuseElement->paArgs[0].uProvider
|
---|
2837 | || !pReuseElement->paArgs[0].uProvider)
|
---|
2838 | return true;
|
---|
2839 | return false;
|
---|
2840 | }
|
---|
2841 |
|
---|
2842 |
|
---|
2843 | /** VFS chain element 'ext'. */
|
---|
2844 | static RTVFSCHAINELEMENTREG g_rtVfsChainExtVolReg =
|
---|
2845 | {
|
---|
2846 | /* uVersion = */ RTVFSCHAINELEMENTREG_VERSION,
|
---|
2847 | /* fReserved = */ 0,
|
---|
2848 | /* pszName = */ "ext",
|
---|
2849 | /* ListEntry = */ { NULL, NULL },
|
---|
2850 | /* pszHelp = */ "Open a EXT file system, requires a file object on the left side.\n"
|
---|
2851 | "First argument is an optional 'ro' (read-only) or 'rw' (read-write) flag.\n",
|
---|
2852 | /* pfnValidate = */ rtVfsChainExtVol_Validate,
|
---|
2853 | /* pfnInstantiate = */ rtVfsChainExtVol_Instantiate,
|
---|
2854 | /* pfnCanReuseElement = */ rtVfsChainExtVol_CanReuseElement,
|
---|
2855 | /* uEndMarker = */ RTVFSCHAINELEMENTREG_VERSION
|
---|
2856 | };
|
---|
2857 |
|
---|
2858 | RTVFSCHAIN_AUTO_REGISTER_ELEMENT_PROVIDER(&g_rtVfsChainExtVolReg, rtVfsChainExtVolReg);
|
---|
2859 |
|
---|