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1 /* |
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2 * YAFFS: Yet another FFS. A NAND-flash specific file system. |
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3 * yaffs_fs.c |
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4 * |
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5 * Copyright (C) 2002 Aleph One Ltd. |
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6 * for Toby Churchill Ltd and Brightstar Engineering |
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7 * |
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8 * Created by Charles Manning <charles@aleph1.co.uk> |
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9 * |
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10 * This program is free software; you can redistribute it and/or modify |
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11 * it under the terms of the GNU General Public License version 2 as |
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12 * published by the Free Software Foundation. |
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13 * |
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14 * This is the file system front-end to YAFFS that hooks it up to |
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15 * the VFS. |
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16 * |
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17 * Special notes: |
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18 * >> sb->u.generic_sbp points to the yaffs_Device associated with this superblock |
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19 * >> inode->u.generic_ip points to the associated yaffs_Object. |
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20 * |
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21 * |
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22 * Acknowledgements: |
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23 * * Luc van OostenRyck for numerous patches. |
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24 * * Nick Bane for numerous patches. |
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25 * * Nick Bane for 2.5/2.6 integration. |
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26 * * Andras Toth for mknod rdev issue. |
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27 * * Michael Fischer for finding the problem with inode inconsistency. |
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28 * * Some code bodily lifted from JFFS2. |
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29 */ |
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30 |
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31 |
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32 const char *yaffs_fs_c_version = "$Id$"; |
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33 extern const char *yaffs_guts_c_version; |
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34 |
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35 |
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10
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36 |
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37 #include <linux/config.h> |
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38 #include <linux/kernel.h> |
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39 #include <linux/module.h> |
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40 #include <linux/version.h> |
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41 #include <linux/slab.h> |
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42 #include <linux/init.h> |
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43 #include <linux/list.h> |
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44 #include <linux/fs.h> |
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45 #include <linux/proc_fs.h> |
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46 #include <linux/pagemap.h> |
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47 #include <linux/mtd/mtd.h> |
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48 #include <linux/interrupt.h> |
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49 #include <linux/string.h> |
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50 |
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51 |
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52 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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53 |
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54 #include <linux/statfs.h> /* Added NCB 15-8-2003 */ |
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55 #include <asm/statfs.h> |
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56 #define UnlockPage(p) unlock_page(p) |
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57 #define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) |
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58 //#define kdevname(x) cdevname(to_kdev_t(x)) |
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59 #define kdevname(x) "(unavailable)" // temporary fix |
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60 |
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61 #else |
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62 |
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63 #include <linux/locks.h> |
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64 |
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65 #endif |
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66 |
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67 #include <asm/uaccess.h> |
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68 |
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69 #include "yportenv.h" |
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70 #include "yaffs_guts.h" |
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71 |
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72 |
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73 |
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74 |
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75 unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS; |
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76 //unsigned yaffs_traceMask = 0xFFFFFFFF; |
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7
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77 |
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78 |
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79 #ifdef CONFIG_YAFFS_RAM_ENABLED |
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80 #include "yaffs_nandemul.h" |
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81 // 2 MB of RAM for emulation |
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82 #define YAFFS_RAM_EMULATION_SIZE 0x200000 |
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83 #endif //CONFIG_YAFFS_RAM_ENABLED |
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84 |
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85 #if CONFIG_YAFFS2_RAM_ENABLED |
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86 #include "yaffs_nandemul2k.h" |
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87 #endif |
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88 |
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89 #ifdef CONFIG_YAFFS_MTD_ENABLED |
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90 #include <linux/mtd/mtd.h> |
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91 #include "yaffs_mtdif.h" |
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92 #include "yaffs_mtdif2.h" |
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93 #endif //CONFIG_YAFFS_MTD_ENABLED |
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94 |
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95 //#define T(x) printk x |
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96 |
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97 |
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98 |
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99 #define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip)) |
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100 #define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode) |
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101 //NCB #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) |
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102 |
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103 //#if defined(CONFIG_KERNEL_2_5) |
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104 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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105 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info) |
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106 #else |
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107 #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) |
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108 #endif |
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109 |
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110 |
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111 static void yaffs_put_super(struct super_block *sb); |
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112 |
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113 #if 0 |
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114 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos); |
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115 #endif |
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116 |
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117 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos); |
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118 |
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119 static int yaffs_file_flush(struct file* file); |
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120 |
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121 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync); |
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122 |
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123 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); |
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124 |
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125 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ |
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126 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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127 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n); |
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128 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n); |
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129 #else |
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130 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode); |
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131 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry); |
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132 #endif |
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133 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry); |
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134 static int yaffs_unlink(struct inode * dir, struct dentry *dentry); |
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135 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname); |
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136 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode); |
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137 |
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138 //#if defined(CONFIG_KERNEL_2_5) |
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139 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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140 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev); |
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141 #else |
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142 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev); |
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143 #endif |
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144 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry); |
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145 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); |
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146 |
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147 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ |
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148 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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149 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf); |
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150 #else |
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151 static int yaffs_statfs(struct super_block *sb, struct statfs *buf); |
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152 #endif |
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153 static void yaffs_read_inode (struct inode *inode); |
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154 |
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155 //#if defined(CONFIG_KERNEL_2_5) |
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156 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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157 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data); |
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158 #else |
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159 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent); |
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160 #endif |
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161 |
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162 static void yaffs_put_inode (struct inode *inode); |
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163 static void yaffs_delete_inode(struct inode *); |
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164 static void yaffs_clear_inode(struct inode *); |
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165 |
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166 static int yaffs_readpage(struct file *file, struct page * page); |
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167 static int yaffs_writepage(struct page *page); |
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168 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to); |
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169 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to); |
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170 |
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171 static int yaffs_readlink(struct dentry *dentry, char *buffer, int buflen); |
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172 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); |
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173 |
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174 |
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175 |
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176 |
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177 static struct address_space_operations yaffs_file_address_operations = { |
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178 readpage: yaffs_readpage, |
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179 writepage: yaffs_writepage, |
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180 prepare_write: yaffs_prepare_write, |
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181 commit_write: yaffs_commit_write |
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182 }; |
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183 |
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184 |
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185 static struct file_operations yaffs_file_operations = { |
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186 |
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187 read: generic_file_read, |
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188 write: generic_file_write, |
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189 |
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190 mmap: generic_file_mmap, |
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191 flush: yaffs_file_flush, |
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192 fsync: yaffs_sync_object, |
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193 }; |
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194 |
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195 |
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196 static struct inode_operations yaffs_file_inode_operations = { |
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197 setattr: yaffs_setattr, |
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198 }; |
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199 |
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200 |
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201 struct inode_operations yaffs_symlink_inode_operations = |
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202 { |
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203 readlink: yaffs_readlink, |
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204 follow_link: yaffs_follow_link, |
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205 setattr: yaffs_setattr |
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206 }; |
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207 |
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208 static struct inode_operations yaffs_dir_inode_operations = { |
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209 create: yaffs_create, |
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210 lookup: yaffs_lookup, |
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211 link: yaffs_link, |
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212 unlink: yaffs_unlink, |
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213 symlink: yaffs_symlink, |
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214 mkdir: yaffs_mkdir, |
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215 rmdir: yaffs_unlink, |
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216 mknod: yaffs_mknod, |
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217 rename: yaffs_rename, |
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218 setattr: yaffs_setattr, |
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219 }; |
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220 |
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221 static struct file_operations yaffs_dir_operations = { |
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222 read: generic_read_dir, |
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223 readdir: yaffs_readdir, |
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224 fsync: yaffs_sync_object, |
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225 }; |
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226 |
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227 |
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228 static struct super_operations yaffs_super_ops = { |
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229 statfs: yaffs_statfs, |
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230 read_inode: yaffs_read_inode, |
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231 put_inode: yaffs_put_inode, |
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232 put_super: yaffs_put_super, |
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233 // remount_fs: |
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234 delete_inode: yaffs_delete_inode, |
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235 clear_inode: yaffs_clear_inode, |
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236 }; |
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237 |
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238 |
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239 |
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240 static void yaffs_GrossLock(yaffs_Device *dev) |
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241 { |
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242 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n")); |
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243 |
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244 down(&dev->grossLock); |
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245 } |
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246 |
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247 static void yaffs_GrossUnlock(yaffs_Device *dev) |
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248 { |
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249 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n")); |
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250 up(&dev->grossLock); |
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251 |
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252 } |
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253 |
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254 static int yaffs_readlink(struct dentry *dentry, char *buffer, int buflen) |
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255 { |
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256 unsigned char *alias; |
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257 int ret; |
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258 |
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259 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; |
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260 |
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261 |
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262 yaffs_GrossLock(dev); |
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263 |
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264 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); |
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265 |
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266 yaffs_GrossUnlock(dev); |
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267 |
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268 if(!alias) |
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269 return -ENOMEM; |
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270 |
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271 ret = vfs_readlink(dentry, buffer, buflen, alias); |
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272 kfree(alias); |
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273 return ret; |
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274 } |
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275 |
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276 static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) |
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277 { |
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278 unsigned char *alias; |
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279 int ret; |
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280 yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; |
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281 |
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282 |
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283 yaffs_GrossLock(dev); |
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284 |
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285 alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); |
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286 |
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287 yaffs_GrossUnlock(dev); |
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288 |
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289 if(!alias) |
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290 return -ENOMEM; |
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291 |
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292 ret = vfs_follow_link(nd,alias); |
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293 kfree(alias); |
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294 return ret; |
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295 } |
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296 |
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297 |
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298 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj); |
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299 |
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300 /* |
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301 * Lookup is used to find objects in the fs |
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302 */ |
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303 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ |
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304 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
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305 |
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306 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n) |
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307 #else |
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308 static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry) |
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309 #endif |
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310 { |
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311 yaffs_Object *obj; |
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312 struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here |
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313 |
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314 yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev; |
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315 |
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316 |
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317 yaffs_GrossLock(dev); |
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318 |
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319 |
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320 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name)); |
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321 |
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322 obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name); |
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323 |
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324 obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink |
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325 |
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326 |
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327 |
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328 if(obj) |
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329 { |
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330 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId)); |
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331 |
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332 inode = yaffs_get_inode(dir->i_sb, obj->st_mode,0,obj); |
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333 |
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334 if(inode) |
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335 { |
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336 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n")); |
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337 /* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */ |
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338 #if 0 |
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339 //dget(dentry); // try to solve directory bug |
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340 d_add(dentry,inode); |
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341 |
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342 yaffs_GrossUnlock(dev); |
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343 |
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344 // return dentry; |
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345 return NULL; |
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346 #endif |
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347 } |
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348 |
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349 } |
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350 else |
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351 { |
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352 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n")); |
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353 |
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354 } |
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355 yaffs_GrossUnlock(dev); |
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356 |
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357 /* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/ |
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358 d_add(dentry,inode); |
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359 |
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360 return NULL; |
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361 // return (ERR_PTR(-EIO)); |
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362 |
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363 } |
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364 |
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365 // For now put inode is just for debugging |
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366 // Put inode is called when the inode **structure** is put. |
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367 static void yaffs_put_inode(struct inode *inode) |
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368 { |
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369 T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count))); |
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370 |
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371 } |
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372 |
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373 // clear is called to tell the fs to release any per-inode data it holds |
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374 static void yaffs_clear_inode(struct inode *inode) |
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375 { |
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376 yaffs_Object *obj; |
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377 yaffs_Device *dev; |
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378 |
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379 obj = yaffs_InodeToObject(inode); |
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380 |
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381 T(YAFFS_TRACE_OS,("yaffs_clear_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count), |
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382 obj ? "object exists" : "null object")); |
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383 |
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384 if(obj) |
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385 { |
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386 dev = obj->myDev; |
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387 yaffs_GrossLock(dev); |
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388 |
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389 // Clear the association between the inode ant the yaffs_Object. |
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390 obj->myInode = NULL; |
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391 inode->u.generic_ip = NULL; |
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392 |
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393 // If the object freeing was deferred, then the real free happens now. |
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394 // This should fix the inode inconsistency problem. |
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395 |
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396 yaffs_HandleDeferedFree(obj); |
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397 |
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398 yaffs_GrossUnlock(dev); |
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399 } |
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400 |
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401 |
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402 } |
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403 |
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404 // delete is called when the link count is zero and the inode |
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405 // is put (ie. nobody wants to know about it anymore, time to |
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406 // delete the file). |
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407 // NB Must call clear_inode() |
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408 static void yaffs_delete_inode(struct inode *inode) |
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409 { |
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410 yaffs_Object *obj = yaffs_InodeToObject(inode); |
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411 yaffs_Device *dev; |
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412 |
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413 T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count), |
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414 obj ? "object exists" : "null object")); |
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415 |
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416 if(obj) |
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417 { |
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418 dev = obj->myDev; |
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419 yaffs_GrossLock(dev); |
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420 yaffs_DeleteFile(obj); |
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421 yaffs_GrossUnlock(dev); |
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422 } |
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423 clear_inode(inode); |
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424 } |
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425 |
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426 |
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427 static int yaffs_file_flush(struct file* file) |
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428 { |
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429 yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry); |
|
|
430 |
|
|
431 yaffs_Device *dev = obj->myDev; |
|
|
432 |
|
|
433 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId, |
|
|
434 obj->dirty ? "dirty" : "clean")); |
|
|
435 |
|
|
436 yaffs_GrossLock(dev); |
|
|
437 |
|
|
438 yaffs_FlushFile(obj,1); |
|
|
439 |
|
|
440 yaffs_GrossUnlock(dev); |
|
|
441 |
|
|
442 return 0; |
|
|
443 } |
|
|
444 |
|
|
445 |
|
|
446 |
|
|
447 static int yaffs_readpage_nolock(struct file *f, struct page * pg) |
|
|
448 { |
|
|
449 // Lifted from jffs2 |
|
|
450 |
|
|
451 yaffs_Object *obj; |
|
|
452 unsigned char *pg_buf; |
|
|
453 int ret; |
|
|
454 |
|
|
455 yaffs_Device *dev; |
|
|
456 |
|
|
457 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n", |
|
|
458 (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE)); |
|
|
459 |
|
|
460 obj = yaffs_DentryToObject(f->f_dentry); |
|
|
461 |
|
|
462 dev = obj->myDev; |
|
|
463 |
|
|
464 |
|
|
465 if (!PageLocked(pg)) |
|
|
466 PAGE_BUG(pg); |
|
|
467 |
|
|
468 pg_buf = kmap(pg); |
|
|
469 /* FIXME: Can kmap fail? */ |
|
|
470 |
|
|
471 yaffs_GrossLock(dev); |
|
|
472 |
|
|
473 ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE); |
|
|
474 |
|
|
475 yaffs_GrossUnlock(dev); |
|
|
476 |
|
|
477 if(ret >= 0) ret = 0; |
|
|
478 |
|
|
479 if (ret) { |
|
|
480 ClearPageUptodate(pg); |
|
|
481 SetPageError(pg); |
|
|
482 } else { |
|
|
483 SetPageUptodate(pg); |
|
|
484 ClearPageError(pg); |
|
|
485 } |
|
|
486 |
|
|
487 flush_dcache_page(pg); |
|
|
488 kunmap(pg); |
|
|
489 |
|
|
490 |
|
|
491 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n")); |
|
|
492 return ret; |
|
|
493 } |
|
|
494 |
|
|
495 static int yaffs_readpage_unlock(struct file *f, struct page *pg) |
|
|
496 { |
|
|
497 int ret = yaffs_readpage_nolock(f,pg); |
|
|
498 UnlockPage(pg); |
|
|
499 return ret; |
|
|
500 } |
|
|
501 |
|
|
502 static int yaffs_readpage(struct file *f, struct page * pg) |
|
|
503 { |
|
|
504 return yaffs_readpage_unlock(f,pg); |
|
|
505 } |
|
|
506 |
|
|
507 // writepage inspired by/stolen from smbfs |
|
|
508 // |
|
|
509 |
|
|
510 static int yaffs_writepage(struct page *page) |
|
|
511 { |
|
|
512 struct address_space *mapping = page->mapping; |
|
|
513 struct inode *inode; |
|
|
514 unsigned long end_index; |
|
|
515 char *buffer; |
|
|
516 yaffs_Object *obj; |
|
|
517 int nWritten = 0; |
|
|
518 unsigned nBytes; |
|
|
519 |
|
|
520 if (!mapping) |
|
|
521 BUG(); |
|
|
522 inode = mapping->host; |
|
|
523 if (!inode) |
|
|
524 BUG(); |
|
|
525 |
|
|
526 end_index = inode->i_size >> PAGE_CACHE_SHIFT; |
|
|
527 |
|
|
528 /* easy case */ |
|
|
529 if (page->index < end_index) |
|
|
530 { |
|
|
531 nBytes = PAGE_CACHE_SIZE; |
|
|
532 } |
|
|
533 else |
|
|
534 { |
|
|
535 nBytes = inode->i_size & (PAGE_CACHE_SIZE-1); |
|
|
536 } |
|
|
537 // What's happening here? |
|
|
538 ///* OK, are we completely out? */ |
|
|
539 //if (page->index >= end_index+1 || !offset) |
|
|
540 // return -EIO; |
|
|
541 |
|
|
542 get_page(page); |
|
|
543 |
|
|
544 |
|
|
545 buffer = kmap(page); |
|
|
546 |
|
|
547 obj = yaffs_InodeToObject(inode); |
|
|
548 yaffs_GrossLock(obj->myDev); |
|
|
549 |
|
|
550 |
|
|
551 nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes); |
|
|
552 |
|
|
553 yaffs_GrossUnlock(obj->myDev); |
|
|
554 |
|
|
555 kunmap(page); |
|
|
556 SetPageUptodate(page); |
|
|
557 UnlockPage(page); |
|
|
558 put_page(page); |
|
|
559 |
|
|
560 return (nWritten == nBytes) ? 0 : -ENOSPC; |
|
|
561 } |
|
|
562 |
|
|
563 |
|
|
564 |
|
|
565 static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to) |
|
|
566 { |
|
|
567 |
|
|
568 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n")); |
|
|
569 if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE)) |
|
|
570 return yaffs_readpage_nolock(f,pg); |
|
|
571 |
|
|
572 return 0; |
|
|
573 |
|
|
574 } |
|
|
575 |
|
|
576 static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to) |
|
|
577 { |
|
|
578 |
|
|
579 void *addr = page_address(pg) + offset; |
|
|
580 loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset; |
|
|
581 int nBytes = to - offset; |
|
|
582 int nWritten; |
|
|
583 |
|
|
584 unsigned spos = pos; |
|
|
585 unsigned saddr = (unsigned)addr; |
|
|
586 |
|
|
587 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes)); |
|
|
588 |
|
|
589 nWritten = yaffs_file_write(f,addr, nBytes, &pos); |
|
|
590 |
|
|
591 if(nWritten != nBytes) |
|
|
592 { |
|
|
593 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes)); |
|
|
594 SetPageError(pg); |
|
|
595 ClearPageUptodate(pg); |
|
|
596 } |
|
|
597 else |
|
|
598 { |
|
|
599 SetPageUptodate(pg); |
|
|
600 } |
|
|
601 |
|
|
602 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten)); |
|
|
603 |
|
|
604 return nWritten; |
|
|
605 |
|
|
606 } |
|
|
607 |
|
|
608 |
|
|
609 |
|
|
610 static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj) |
|
|
611 { |
|
|
612 if (inode && obj) |
|
|
613 { |
|
|
614 inode->i_ino = obj->objectId; |
|
|
615 inode->i_mode = obj->st_mode; |
|
|
616 inode->i_uid = obj->st_uid; |
|
|
617 inode->i_gid = obj->st_gid; |
|
|
618 inode->i_blksize = inode->i_sb->s_blocksize; |
|
|
619 //#if defined(CONFIG_KERNEL_2_5) |
|
|
620 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
621 |
|
|
622 inode->i_rdev = old_decode_dev(obj->st_rdev); |
|
|
623 inode->i_atime.tv_sec = (time_t)(obj->st_atime); |
|
|
624 inode->i_atime.tv_nsec = 0; |
|
|
625 inode->i_mtime.tv_sec = (time_t)obj->st_mtime; |
|
|
626 inode->i_mtime.tv_nsec =0; |
|
|
627 inode->i_ctime.tv_sec = (time_t)obj->st_ctime; |
|
|
628 inode->i_ctime.tv_nsec = 0; |
|
|
629 #else |
|
|
630 inode->i_rdev = obj->st_rdev; |
|
|
631 inode->i_atime = obj->st_atime; |
|
|
632 inode->i_mtime = obj->st_mtime; |
|
|
633 inode->i_ctime = obj->st_ctime; |
|
|
634 #endif |
|
|
635 inode->i_size = yaffs_GetObjectFileLength(obj); |
|
|
636 inode->i_blocks = (inode->i_size + 511) >> 9; |
|
|
637 |
|
|
638 inode->i_nlink = yaffs_GetObjectLinkCount(obj); |
|
|
639 |
|
|
640 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n", |
|
|
641 inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count))); |
|
|
642 |
|
|
643 switch (obj->st_mode & S_IFMT) |
|
|
644 { |
|
|
645 default: // fifo, device or socket |
|
13
|
646 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
647 init_special_inode(inode, obj->st_mode,old_decode_dev(obj->st_rdev)); |
|
|
648 #else |
|
|
649 init_special_inode(inode, obj->st_mode,(dev_t)(obj->st_rdev)); |
|
|
650 #endif break; |
|
7
|
651 case S_IFREG: // file |
|
|
652 inode->i_op = &yaffs_file_inode_operations; |
|
|
653 inode->i_fop = &yaffs_file_operations; |
|
|
654 inode->i_mapping->a_ops = &yaffs_file_address_operations; |
|
|
655 break; |
|
|
656 case S_IFDIR: // directory |
|
|
657 inode->i_op = &yaffs_dir_inode_operations; |
|
|
658 inode->i_fop = &yaffs_dir_operations; |
|
|
659 break; |
|
|
660 case S_IFLNK: // symlink |
|
|
661 inode->i_op = &yaffs_symlink_inode_operations; |
|
|
662 break; |
|
|
663 } |
|
|
664 |
|
|
665 |
|
|
666 inode->u.generic_ip = obj; |
|
|
667 obj->myInode = inode; |
|
|
668 |
|
|
669 } |
|
|
670 else |
|
|
671 { |
|
|
672 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n")); |
|
|
673 } |
|
|
674 |
|
|
675 } |
|
|
676 |
|
|
677 struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj) |
|
|
678 { |
|
|
679 struct inode * inode; |
|
|
680 |
|
|
681 if(!sb) |
|
|
682 { |
|
|
683 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n")); |
|
|
684 return NULL; |
|
|
685 |
|
|
686 } |
|
|
687 |
|
|
688 if(!obj) |
|
|
689 { |
|
|
690 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n")); |
|
|
691 return NULL; |
|
|
692 |
|
|
693 } |
|
|
694 |
|
|
695 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId)); |
|
|
696 |
|
|
697 inode = iget(sb,obj->objectId); |
|
|
698 |
|
|
699 // NB Side effect: iget calls back to yaffs_read_inode(). |
|
|
700 // iget also increments the inode's i_count |
|
|
701 |
|
|
702 return inode; |
|
|
703 } |
|
|
704 |
|
|
705 #if 0 |
|
|
706 |
|
|
707 // No longer used because we use generic rw */ |
|
|
708 static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos) |
|
|
709 { |
|
|
710 yaffs_Object *obj; |
|
|
711 int nRead,ipos; |
|
|
712 struct inode *inode; |
|
|
713 yaffs_Device *dev; |
|
|
714 |
|
|
715 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n")); |
|
|
716 |
|
|
717 obj = yaffs_DentryToObject(f->f_dentry); |
|
|
718 |
|
|
719 dev = obj->myDev; |
|
|
720 |
|
|
721 yaffs_GrossLock(dev); |
|
|
722 |
|
|
723 inode = f->f_dentry->d_inode; |
|
|
724 |
|
|
725 if (*pos < inode->i_size) |
|
|
726 { |
|
|
727 if (*pos + n > inode->i_size) |
|
|
728 { |
|
|
729 n = inode->i_size - *pos; |
|
|
730 } |
|
|
731 } |
|
|
732 else |
|
|
733 { |
|
|
734 n = 0; |
|
|
735 } |
|
|
736 |
|
|
737 nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n); |
|
|
738 if(nRead > 0) |
|
|
739 { |
|
|
740 f->f_pos += nRead; |
|
|
741 } |
|
|
742 |
|
|
743 yaffs_GrossUnlock(dev); |
|
|
744 |
|
|
745 ipos = *pos; |
|
|
746 |
|
|
747 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos)); |
|
|
748 return nRead; |
|
|
749 |
|
|
750 } |
|
|
751 |
|
|
752 #endif |
|
|
753 |
|
|
754 static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos) |
|
|
755 { |
|
|
756 yaffs_Object *obj; |
|
|
757 int nWritten,ipos; |
|
|
758 struct inode *inode; |
|
|
759 yaffs_Device *dev; |
|
|
760 |
|
|
761 |
|
|
762 obj = yaffs_DentryToObject(f->f_dentry); |
|
|
763 |
|
|
764 dev = obj->myDev; |
|
|
765 |
|
|
766 yaffs_GrossLock(dev); |
|
|
767 |
|
|
768 inode = f->f_dentry->d_inode; |
|
|
769 |
|
|
770 if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) |
|
|
771 { |
|
|
772 ipos = inode->i_size; |
|
|
773 } |
|
|
774 else |
|
|
775 { |
|
|
776 ipos = *pos; |
|
|
777 } |
|
|
778 |
|
|
779 |
|
|
780 if(!obj) |
|
|
781 { |
|
|
782 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n")); |
|
|
783 } |
|
|
784 else |
|
|
785 { |
|
|
786 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write about to write writing %d bytes to object %d at %d\n",n,obj->objectId,ipos)); |
|
|
787 } |
|
|
788 |
|
|
789 nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n); |
|
|
790 |
|
|
791 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos)); |
|
|
792 if(nWritten > 0) |
|
|
793 { |
|
|
794 ipos += nWritten; |
|
|
795 *pos = ipos; |
|
|
796 if(ipos > inode->i_size) |
|
|
797 { |
|
|
798 inode->i_size = ipos; |
|
|
799 inode->i_blocks = (ipos + 511)>>9; |
|
|
800 |
|
|
801 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks))); |
|
|
802 } |
|
|
803 |
|
|
804 } |
|
|
805 yaffs_GrossUnlock(dev); |
|
|
806 |
|
|
807 return nWritten != n ? -ENOSPC : nWritten; |
|
|
808 } |
|
|
809 |
|
|
810 |
|
|
811 |
|
|
812 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) |
|
|
813 { |
|
|
814 yaffs_Object *obj; |
|
|
815 yaffs_Device *dev; |
|
|
816 struct inode *inode = f->f_dentry->d_inode; |
|
|
817 unsigned long offset, curoffs; |
|
|
818 struct list_head *i; |
|
|
819 yaffs_Object *l; |
|
|
820 |
|
|
821 char name[YAFFS_MAX_NAME_LENGTH +1]; |
|
|
822 |
|
|
823 obj = yaffs_DentryToObject(f->f_dentry); |
|
|
824 dev = obj->myDev; |
|
|
825 |
|
|
826 yaffs_GrossLock(dev); |
|
|
827 |
|
|
828 offset = f->f_pos; |
|
|
829 |
|
|
830 T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset)); |
|
|
831 |
|
|
832 if(offset == 0) |
|
|
833 { |
|
|
834 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino)); |
|
|
835 if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0) |
|
|
836 { |
|
|
837 goto out; |
|
|
838 } |
|
|
839 offset++; |
|
|
840 f->f_pos++; |
|
|
841 } |
|
|
842 if(offset == 1) |
|
|
843 { |
|
|
844 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino)); |
|
|
845 if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0) |
|
|
846 { |
|
|
847 goto out; |
|
|
848 } |
|
|
849 offset++; |
|
|
850 f->f_pos++; |
|
|
851 } |
|
|
852 |
|
|
853 curoffs = 1; |
|
|
854 |
|
|
855 list_for_each(i,&obj->variant.directoryVariant.children) |
|
|
856 { |
|
|
857 curoffs++; |
|
|
858 if(curoffs >= offset) |
|
|
859 { |
|
|
860 l = list_entry(i, yaffs_Object,siblings); |
|
|
861 |
|
|
862 yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1); |
|
|
863 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l))); |
|
|
864 |
|
|
865 if(filldir(dirent, |
|
|
866 name, |
|
|
867 strlen(name), |
|
|
868 offset, |
|
|
869 yaffs_GetObjectInode(l), |
|
|
870 yaffs_GetObjectType(l)) |
|
|
871 < 0) |
|
|
872 { |
|
|
873 goto up_and_out; |
|
|
874 } |
|
|
875 |
|
|
876 offset++; |
|
|
877 f->f_pos++; |
|
|
878 } |
|
|
879 } |
|
|
880 |
|
|
881 up_and_out: |
|
|
882 out: |
|
|
883 |
|
|
884 yaffs_GrossUnlock(dev); |
|
|
885 |
|
|
886 return 0; |
|
|
887 } |
|
|
888 |
|
|
889 |
|
|
890 /* |
|
|
891 * File creation. Allocate an inode, and we're done.. |
|
|
892 */ |
|
|
893 //#if defined(CONFIG_KERNEL_2_5) |
|
|
894 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
895 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
|
|
896 #else |
|
|
897 static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev) |
|
|
898 #endif |
|
|
899 { |
|
|
900 struct inode *inode; |
|
|
901 |
|
|
902 yaffs_Object *obj = NULL; |
|
|
903 yaffs_Device *dev; |
|
|
904 |
|
|
905 yaffs_Object *parent = yaffs_InodeToObject(dir); |
|
|
906 |
|
|
907 int error = -ENOSPC; |
|
|
908 |
|
|
909 if(parent) |
|
|
910 { |
|
|
911 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n", |
|
|
912 parent->objectId,parent->variantType)); |
|
|
913 } |
|
|
914 else |
|
|
915 { |
|
|
916 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n")); |
|
|
917 return -EPERM; |
|
|
918 } |
|
|
919 |
|
|
920 T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n", |
|
|
921 dentry->d_name.name, mode,rdev)); |
|
|
922 |
|
|
923 dev = parent->myDev; |
|
|
924 |
|
|
925 yaffs_GrossLock(dev); |
|
|
926 |
|
|
927 switch (mode & S_IFMT) |
|
|
928 { |
|
|
929 default: |
|
|
930 // Special (socket, fifo, device...) |
|
|
931 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n")); |
|
13
|
932 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
933 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,old_encode_dev(rdev)); |
|
|
934 #else |
|
|
935 obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,rdev); |
|
|
936 #endif break; |
|
7
|
937 case S_IFREG: // file |
|
|
938 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n")); |
|
|
939 obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,current->uid, current->gid); |
|
|
940 break; |
|
|
941 case S_IFDIR: // directory |
|
|
942 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n")); |
|
|
943 obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,current->uid, current->gid); |
|
|
944 break; |
|
|
945 case S_IFLNK: // symlink |
|
|
946 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n")); |
|
|
947 obj = NULL; // Do we ever get here? |
|
|
948 break; |
|
|
949 } |
|
|
950 |
|
|
951 if(obj) |
|
|
952 { |
|
|
953 inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); |
|
|
954 d_instantiate(dentry, inode); |
|
|
955 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count))); |
|
|
956 error = 0; |
|
|
957 } |
|
|
958 else |
|
|
959 { |
|
|
960 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n")); |
|
|
961 error = -ENOMEM; |
|
|
962 } |
|
|
963 |
|
|
964 yaffs_GrossUnlock(dev); |
|
|
965 |
|
|
966 return error; |
|
|
967 } |
|
|
968 |
|
|
969 static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode) |
|
|
970 { |
|
|
971 int retVal; |
|
|
972 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n")); |
|
|
973 retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); |
|
|
974 #if 0 |
|
|
975 // attempt to fix dir bug - didn't work |
|
|
976 if(!retVal) |
|
|
977 { |
|
|
978 dget(dentry); |
|
|
979 } |
|
|
980 #endif |
|
|
981 return retVal; |
|
|
982 } |
|
|
983 |
|
|
984 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ |
|
|
985 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
986 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n) |
|
|
987 #else |
|
|
988 static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode) |
|
|
989 #endif |
|
|
990 { |
|
|
991 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n")); |
|
|
992 return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); |
|
|
993 } |
|
|
994 |
|
|
995 |
|
|
996 static int yaffs_unlink(struct inode * dir, struct dentry *dentry) |
|
|
997 { |
|
|
998 int retVal; |
|
|
999 |
|
|
1000 yaffs_Device *dev; |
|
|
1001 |
|
|
1002 |
|
|
1003 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name)); |
|
|
1004 |
|
|
1005 dev = yaffs_InodeToObject(dir)->myDev; |
|
|
1006 |
|
|
1007 yaffs_GrossLock(dev); |
|
|
1008 |
|
|
1009 |
|
|
1010 retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name); |
|
|
1011 |
|
|
1012 |
|
|
1013 yaffs_GrossUnlock(dev); |
|
|
1014 |
|
|
1015 if( retVal == YAFFS_OK) |
|
|
1016 { |
|
|
1017 dentry->d_inode->i_nlink--; |
|
|
1018 mark_inode_dirty(dentry->d_inode); |
|
|
1019 return 0; |
|
|
1020 } |
|
|
1021 else |
|
|
1022 { |
|
|
1023 return -ENOTEMPTY; |
|
|
1024 } |
|
|
1025 } |
|
|
1026 |
|
|
1027 |
|
|
1028 /* |
|
|
1029 * Create a link... |
|
|
1030 */ |
|
|
1031 static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry) |
|
|
1032 { |
|
|
1033 struct inode *inode = old_dentry->d_inode; |
|
|
1034 yaffs_Object *obj = NULL; |
|
|
1035 yaffs_Object *link=NULL; |
|
|
1036 yaffs_Device *dev; |
|
|
1037 |
|
|
1038 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n")); |
|
|
1039 |
|
|
1040 obj = yaffs_InodeToObject(inode); |
|
|
1041 dev = obj->myDev; |
|
|
1042 |
|
|
1043 yaffs_GrossLock(dev); |
|
|
1044 |
|
|
1045 if (!S_ISDIR(inode->i_mode)) // Don't link directories |
|
|
1046 { |
|
|
1047 link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj); |
|
|
1048 } |
|
|
1049 |
|
|
1050 |
|
|
1051 if(link) |
|
|
1052 { |
|
|
1053 old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj); |
|
|
1054 d_instantiate(dentry, old_dentry->d_inode); |
|
|
1055 atomic_inc(&old_dentry->d_inode->i_count); |
|
|
1056 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n", |
|
|
1057 old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count))); |
|
|
1058 |
|
|
1059 } |
|
|
1060 |
|
|
1061 yaffs_GrossUnlock(dev); |
|
|
1062 |
|
|
1063 |
|
|
1064 if(link) |
|
|
1065 { |
|
|
1066 |
|
|
1067 return 0; |
|
|
1068 } |
|
|
1069 |
|
|
1070 |
|
|
1071 return -EPERM; |
|
|
1072 } |
|
|
1073 |
|
|
1074 |
|
|
1075 static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname) |
|
|
1076 { |
|
|
1077 yaffs_Object *obj; |
|
|
1078 yaffs_Device *dev; |
|
|
1079 |
|
|
1080 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n")); |
|
|
1081 |
|
|
1082 dev = yaffs_InodeToObject(dir)->myDev; |
|
|
1083 yaffs_GrossLock(dev); |
|
|
1084 obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name, |
|
|
1085 S_IFLNK | S_IRWXUGO, current->uid, current->gid, |
|
|
1086 symname); |
|
|
1087 yaffs_GrossUnlock(dev); |
|
|
1088 |
|
|
1089 if(obj) |
|
|
1090 { |
|
|
1091 |
|
|
1092 struct inode* inode; |
|
|
1093 |
|
|
1094 inode = yaffs_get_inode(dir->i_sb, obj->st_mode, 0, obj); |
|
|
1095 d_instantiate(dentry, inode); |
|
|
1096 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n")); |
|
|
1097 return 0; |
|
|
1098 } |
|
|
1099 else |
|
|
1100 { |
|
|
1101 T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n")); |
|
|
1102 |
|
|
1103 } |
|
|
1104 |
|
|
1105 return -ENOMEM; |
|
|
1106 } |
|
|
1107 |
|
|
1108 static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync) |
|
|
1109 { |
|
|
1110 |
|
|
1111 yaffs_Object *obj; |
|
|
1112 yaffs_Device *dev; |
|
|
1113 |
|
|
1114 obj = yaffs_DentryToObject(dentry); |
|
|
1115 |
|
|
1116 dev = obj->myDev; |
|
|
1117 |
|
|
1118 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n")); |
|
|
1119 yaffs_GrossLock(dev); |
|
|
1120 yaffs_FlushFile(obj,1); |
|
|
1121 yaffs_GrossUnlock(dev); |
|
|
1122 return 0; |
|
|
1123 } |
|
|
1124 |
|
|
1125 /* |
|
|
1126 * The VFS layer already does all the dentry stuff for rename. |
|
|
1127 * |
|
|
1128 * NB: POSIX says you can rename an object over an old object of the same name |
|
|
1129 */ |
|
|
1130 static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry) |
|
|
1131 { |
|
|
1132 yaffs_Device *dev; |
|
|
1133 int retVal = YAFFS_FAIL; |
|
|
1134 int removed = 0; |
|
|
1135 yaffs_Object *target; |
|
|
1136 |
|
|
1137 dev = yaffs_InodeToObject(old_dir)->myDev; |
|
|
1138 |
|
|
1139 yaffs_GrossLock(dev); |
|
|
1140 |
|
|
1141 // Check if the target is an existing directory that is not empty. |
|
|
1142 target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name); |
|
|
1143 |
|
|
1144 if(target && |
|
|
1145 target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && |
|
|
1146 !list_empty(&target->variant.directoryVariant.children)) |
|
|
1147 { |
|
|
1148 retVal = YAFFS_FAIL; |
|
|
1149 } |
|
|
1150 else |
|
|
1151 { |
|
|
1152 |
|
|
1153 // Unlink the target if it exists |
|
|
1154 removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name); |
|
|
1155 |
|
|
1156 |
|
|
1157 retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name, |
|
|
1158 yaffs_InodeToObject(new_dir),new_dentry->d_name.name); |
|
|
1159 |
|
|
1160 } |
|
|
1161 yaffs_GrossUnlock(dev); |
|
|
1162 |
|
|
1163 if(retVal == YAFFS_OK) |
|
|
1164 { |
|
|
1165 if(removed == YAFFS_OK) |
|
|
1166 { |
|
|
1167 new_dentry->d_inode->i_nlink--; |
|
|
1168 mark_inode_dirty(new_dentry->d_inode); |
|
|
1169 } |
|
|
1170 |
|
|
1171 return 0; |
|
|
1172 } |
|
|
1173 else |
|
|
1174 { |
|
|
1175 return -ENOTEMPTY; |
|
|
1176 } |
|
|
1177 |
|
|
1178 |
|
|
1179 } |
|
|
1180 |
|
|
1181 static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) |
|
|
1182 { |
|
|
1183 struct inode *inode = dentry->d_inode; |
|
|
1184 int error; |
|
|
1185 yaffs_Device *dev; |
|
|
1186 |
|
|
1187 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId)); |
|
|
1188 |
|
|
1189 if((error = inode_change_ok(inode,attr)) == 0) |
|
|
1190 { |
|
|
1191 |
|
|
1192 dev = yaffs_InodeToObject(inode)->myDev; |
|
|
1193 yaffs_GrossLock(dev); |
|
|
1194 if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK) |
|
|
1195 { |
|
|
1196 error = 0; |
|
|
1197 } |
|
|
1198 else |
|
|
1199 { |
|
|
1200 error = -EPERM; |
|
|
1201 } |
|
|
1202 yaffs_GrossUnlock(dev); |
|
|
1203 inode_setattr(inode,attr); |
|
|
1204 } |
|
|
1205 return error; |
|
|
1206 } |
|
|
1207 |
|
|
1208 //#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */ |
|
|
1209 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
1210 static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf) |
|
|
1211 #else |
|
|
1212 static int yaffs_statfs(struct super_block *sb, struct statfs *buf) |
|
|
1213 #endif |
|
|
1214 { |
|
|
1215 yaffs_Device *dev = yaffs_SuperToDevice(sb); |
|
|
1216 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n")); |
|
|
1217 |
|
|
1218 yaffs_GrossLock(dev); |
|
|
1219 |
|
|
1220 buf->f_type = YAFFS_MAGIC; |
|
|
1221 buf->f_bsize = sb->s_blocksize; |
|
|
1222 buf->f_namelen = 255; |
|
|
1223 buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * YAFFS_CHUNKS_PER_BLOCK/ |
|
|
1224 (sb->s_blocksize/YAFFS_BYTES_PER_CHUNK); |
|
|
1225 buf->f_files = 0; |
|
|
1226 buf->f_ffree = 0; |
|
|
1227 buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/ |
|
|
1228 (sb->s_blocksize/YAFFS_BYTES_PER_CHUNK); |
|
|
1229 buf->f_bavail = buf->f_bfree; |
|
|
1230 |
|
|
1231 yaffs_GrossUnlock(dev); |
|
|
1232 return 0; |
|
|
1233 } |
|
|
1234 |
|
|
1235 static void yaffs_read_inode (struct inode *inode) |
|
|
1236 { |
|
|
1237 // NB This is called as a side effect of other functions and |
|
|
1238 // thus gross locking should always be in place already. |
|
|
1239 |
|
|
1240 yaffs_Object *obj ; |
|
|
1241 yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb); |
|
|
1242 |
|
|
1243 T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino)); |
|
|
1244 |
|
|
1245 obj = yaffs_FindObjectByNumber(dev,inode->i_ino); |
|
|
1246 |
|
|
1247 yaffs_FillInodeFromObject(inode,obj); |
|
|
1248 |
|
|
1249 } |
|
|
1250 |
|
|
1251 |
|
|
1252 |
|
|
1253 // Todo |
|
|
1254 // Currently we only can report a single partition. Need to use lists here |
|
|
1255 static yaffs_Device *yaffs_dev; |
|
|
1256 static yaffs_Device *yaffsram_dev; |
|
|
1257 |
|
|
1258 |
|
|
1259 |
|
|
1260 static void yaffs_put_super(struct super_block *sb) |
|
|
1261 { |
|
|
1262 yaffs_Device *dev = yaffs_SuperToDevice(sb); |
|
|
1263 |
|
|
1264 yaffs_GrossLock(dev); |
|
|
1265 if(dev->putSuperFunc) |
|
|
1266 { |
|
|
1267 dev->putSuperFunc(sb); |
|
|
1268 } |
|
|
1269 yaffs_Deinitialise(dev); |
|
|
1270 yaffs_GrossUnlock(dev); |
|
|
1271 |
|
|
1272 if(dev == yaffs_dev) yaffs_dev = NULL; |
|
|
1273 if(dev == yaffsram_dev) yaffsram_dev = NULL; |
|
|
1274 |
|
|
1275 kfree(dev); |
|
|
1276 } |
|
|
1277 |
|
|
1278 |
|
|
1279 #ifdef CONFIG_YAFFS_MTD_ENABLED |
|
|
1280 |
|
|
1281 static void yaffs_MTDPutSuper(struct super_block *sb) |
|
|
1282 { |
|
|
1283 |
|
|
1284 struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; |
|
|
1285 |
|
|
1286 if(mtd->sync) |
|
|
1287 { |
|
|
1288 mtd->sync(mtd); |
|
|
1289 } |
|
|
1290 |
|
|
1291 put_mtd_device(mtd); |
|
|
1292 } |
|
|
1293 |
|
|
1294 #endif |
|
|
1295 |
|
|
1296 |
|
|
1297 static struct super_block *yaffs_internal_read_super(int yaffsVersion,int useRam, struct super_block * sb, void * data, int silent) |
|
|
1298 { |
|
|
1299 int nBlocks; |
|
|
1300 struct inode * inode = NULL; |
|
|
1301 struct dentry * root; |
|
|
1302 yaffs_Device *dev; |
|
|
1303 int err; |
|
|
1304 |
|
|
1305 sb->s_magic = YAFFS_MAGIC; |
|
|
1306 sb->s_op = &yaffs_super_ops; |
|
|
1307 |
|
|
1308 if(!sb) |
|
|
1309 printk(KERN_INFO"yaffs: sb is NULL\n"); |
|
|
1310 else if(!sb->s_dev) |
|
|
1311 printk(KERN_INFO"yaffs: sb->s_dev is NULL\n"); |
|
|
1312 else if(! kdevname(sb->s_dev)) |
|
|
1313 printk(KERN_INFO"yaffs: kdevname is NULL\n"); |
|
|
1314 else |
|
|
1315 printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, kdevname(sb->s_dev)); |
|
|
1316 |
|
|
1317 |
|
|
1318 |
|
|
1319 #ifdef CONFIG_YAFFS_USE_CHUNK_SIZE |
|
|
1320 sb->s_blocksize = YAFFS_BYTES_PER_CHUNK; |
|
|
1321 sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT; |
|
|
1322 #else |
|
|
1323 sb->s_blocksize = PAGE_CACHE_SIZE; |
|
|
1324 sb->s_blocksize_bits = PAGE_CACHE_SHIFT; |
|
|
1325 #endif |
|
|
1326 T(YAFFS_TRACE_OS,("yaffs_read_super: Using yaffs%d\n",yaffsVersion)); |
|
|
1327 T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize))); |
|
|
1328 |
|
|
1329 #ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY |
|
|
1330 T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n")); |
|
|
1331 #endif |
|
|
1332 |
|
|
1333 |
|
|
1334 |
|
|
1335 if(useRam) |
|
|
1336 { |
|
|
1337 |
|
|
1338 #ifdef CONFIG_YAFFS_RAM_ENABLED |
|
|
1339 // Set the yaffs_Device up for ram emulation |
|
|
1340 |
|
|
1341 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); |
|
|
1342 if(!dev) |
|
|
1343 { |
|
|
1344 // Deep shit could not allocate device structure |
|
|
1345 T(YAFFS_TRACE_OS,("yaffs_read_super: Failed trying to allocate yaffs_Device.\n")); |
|
|
1346 return NULL; |
|
|
1347 } |
|
|
1348 |
|
|
1349 memset(dev,0,sizeof(yaffs_Device)); |
|
|
1350 dev->genericDevice = NULL; // Not used for RAM emulation. |
|
|
1351 |
|
|
1352 nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); |
|
|
1353 dev->startBlock = 1; // Don't use block 0 |
|
|
1354 dev->endBlock = nBlocks - 1; |
|
|
1355 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; |
|
|
1356 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK; |
|
|
1357 dev->nReservedBlocks = 5; |
|
|
1358 |
|
|
1359 if(yaffsVersion == 2) |
|
|
1360 { |
|
|
1361 dev->writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND; |
|
|
1362 dev->readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND; |
|
|
1363 dev->markNANDBlockBad = nandemul2k_MarkNANDBlockBad; |
|
|
1364 dev->queryNANDBlock = nandemul2k_QueryNANDBlock; |
|
|
1365 dev->eraseBlockInNAND = nandemul2k_EraseBlockInNAND; |
|
|
1366 dev->initialiseNAND = nandemul2k_InitialiseNAND; |
|
|
1367 dev->isYaffs2 = 1; |
|
|
1368 dev->nChunksPerBlock = nandemul2k_GetChunksPerBlock(); |
|
|
1369 dev->nBytesPerChunk = nandemul2k_GetBytesPerChunk();; |
|
|
1370 nBlocks = nandemul2k_GetNumberOfBlocks(); |
|
|
1371 dev->startBlock = 1; // Don't use block 0 |
|
|
1372 dev->endBlock = nBlocks - 1; |
|
|
1373 } |
|
|
1374 else |
|
|
1375 { |
|
|
1376 dev->writeChunkToNAND = nandemul_WriteChunkToNAND; |
|
|
1377 dev->readChunkFromNAND = nandemul_ReadChunkFromNAND; |
|
|
1378 dev->eraseBlockInNAND = nandemul_EraseBlockInNAND; |
|
|
1379 dev->initialiseNAND = nandemul_InitialiseNAND; |
|
|
1380 dev->isYaffs2 = 0; |
|
|
1381 } |
|
|
1382 |
|
|
1383 yaffsram_dev = dev; |
|
|
1384 |
|
|
1385 #endif |
|
|
1386 |
|
|
1387 } |
|
|
1388 else |
|
|
1389 { |
|
|
1390 #ifdef CONFIG_YAFFS_MTD_ENABLED |
|
|
1391 struct mtd_info *mtd; |
|
|
1392 |
|
|
1393 T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n", |
|
|
1394 MAJOR(sb->s_dev),MINOR(sb->s_dev),kdevname(sb->s_dev))); |
|
|
1395 |
|
|
1396 // Check it's an mtd device..... |
|
|
1397 if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) |
|
|
1398 { |
|
|
1399 return NULL; // This isn't an mtd device |
|
|
1400 } |
|
|
1401 |
|
|
1402 // Get the device |
|
|
1403 mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); |
|
|
1404 if (!mtd) |
|
|
1405 { |
|
|
1406 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev))); |
|
|
1407 return NULL; |
|
|
1408 } |
|
|
1409 |
|
|
1410 // Check it's NAND |
|
|
1411 if(mtd->type != MTD_NANDFLASH) |
|
|
1412 { |
|
|
1413 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type)); |
|
|
1414 return NULL; |
|
|
1415 } |
|
|
1416 |
|
|
1417 T(YAFFS_TRACE_OS,(" erase %x\n",mtd->erase)); |
|
|
1418 T(YAFFS_TRACE_OS,(" read %x\n",mtd->read)); |
|
|
1419 T(YAFFS_TRACE_OS,(" write %x\n",mtd->write)); |
|
|
1420 T(YAFFS_TRACE_OS,(" readoob %x\n",mtd->read_oob)); |
|
|
1421 T(YAFFS_TRACE_OS,(" writeoob %x\n",mtd->write_oob)); |
|
|
1422 T(YAFFS_TRACE_OS,(" block_isbad %x\n",mtd->block_isbad)); |
|
|
1423 T(YAFFS_TRACE_OS,(" block_markbad %x\n",mtd->block_markbad)); |
|
|
1424 T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock)); |
|
|
1425 T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize)); |
|
|
1426 T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize)); |
|
|
1427 T(YAFFS_TRACE_OS,(" size %d\n",mtd->size)); |
|
|
1428 |
|
|
1429 if(yaffsVersion == 2) |
|
|
1430 { |
|
|
1431 // Check for version 2 style functions |
|
|
1432 if(!mtd->erase || |
|
|
1433 !mtd->block_isbad || |
|
|
1434 !mtd->block_markbad || |
|
|
1435 !mtd->read || |
|
|
1436 !mtd->write || |
|
|
1437 #ifndef CONFIG_YAFFS_USE_OLD_MTD |
|
|
1438 !mtd->write_ecc || |
|
|
1439 !mtd->read_ecc || |
|
|
1440 #endif |
|
|
1441 !mtd->read_oob || |
|
|
1442 !mtd->write_oob ) |
|
|
1443 { |
|
|
1444 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));; |
|
|
1445 return NULL; |
|
|
1446 } |
|
|
1447 |
|
|
1448 if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE || |
|
|
1449 mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) |
|
|
1450 { |
|
|
1451 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n")); |
|
|
1452 return NULL; |
|
|
1453 } } |
|
|
1454 else |
|
|
1455 { |
|
|
1456 // Check for V1 style functions |
|
|
1457 if(!mtd->erase || |
|
|
1458 !mtd->read || |
|
|
1459 !mtd->write || |
|
|
1460 #ifndef CONFIG_YAFFS_USE_OLD_MTD |
|
|
1461 !mtd->write_ecc || |
|
|
1462 !mtd->read_ecc || |
|
|
1463 #endif |
|
|
1464 !mtd->read_oob || |
|
|
1465 !mtd->write_oob ) |
|
|
1466 { |
|
|
1467 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));; |
|
|
1468 return NULL; |
|
|
1469 } |
|
|
1470 |
|
|
1471 if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK || |
|
|
1472 mtd->oobsize != YAFFS_BYTES_PER_SPARE) |
|
|
1473 { |
|
|
1474 T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n")); |
|
|
1475 return NULL; |
|
|
1476 } |
|
|
1477 } |
|
|
1478 |
|
|
1479 |
|
|
1480 // OK, so if we got here, we have an MTD that's NAND and looks |
|
|
1481 // like it has the right capabilities |
|
|
1482 // Set the yaffs_Device up for mtd |
|
|
1483 |
|
|
1484 //#if defined(CONFIG_KERNEL_2_5) |
|
|
1485 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
1486 sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); |
|
|
1487 #else |
|
|
1488 sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL); |
|
|
1489 #endif |
|
|
1490 if(!dev) |
|
|
1491 { |
|
|
1492 // Deep shit could not allocate device structure |
|
|
1493 T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n")); |
|
|
1494 return NULL; |
|
|
1495 } |
|
|
1496 |
|
|
1497 memset(dev,0,sizeof(yaffs_Device)); |
|
|
1498 dev->genericDevice = mtd; |
|
|
1499 |
|
|
1500 // Set up the memory size parameters.... |
|
|
1501 |
|
|
1502 nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); |
|
|
1503 dev->startBlock = 1; // Don't use block 0 |
|
|
1504 dev->endBlock = nBlocks - 1; |
|
|
1505 dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; |
|
|
1506 dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK; |
|
|
1507 dev->nReservedBlocks = 5; |
|
|
1508 dev->nShortOpCaches = 10; // Enable short op caching |
|
|
1509 |
|
|
1510 |
|
|
1511 // ... and the functions. |
|
|
1512 if(yaffsVersion == 2) |
|
|
1513 { |
|
|
1514 dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND; |
|
|
1515 dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND; |
|
|
1516 dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; |
|
|
1517 dev->queryNANDBlock = nandmtd2_QueryNANDBlock; |
|
|
1518 dev->spareBuffer = YMALLOC(mtd->oobsize); |
|
|
1519 dev->isYaffs2 = 1; |
|
|
1520 dev->nBytesPerChunk = mtd->oobblock; |
|
|
1521 dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock; |
|
|
1522 nBlocks = mtd->size / mtd->erasesize; |
|
|
1523 dev->startBlock = 1; // Don't use block 0 |
|
|
1524 dev->endBlock = nBlocks - 1; |
|
|
1525 } |
|
|
1526 else |
|
|
1527 { |
|
|
1528 dev->writeChunkToNAND = nandmtd_WriteChunkToNAND; |
|
|
1529 dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND; |
|
|
1530 dev->isYaffs2 = 0; |
|
|
1531 } |
|
|
1532 // ... and common functions |
|
|
1533 dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND; |
|
|
1534 dev->initialiseNAND = nandmtd_InitialiseNAND; |
|
|
1535 |
|
|
1536 dev->putSuperFunc = yaffs_MTDPutSuper; |
|
|
1537 |
|
|
1538 #ifdef CONFIG_YAFFS_USE_NANDECC |
|
|
1539 dev->useNANDECC = 1; |
|
|
1540 #endif |
|
|
1541 |
|
|
1542 yaffs_dev = dev; |
|
|
1543 |
|
|
1544 #endif |
|
|
1545 } |
|
|
1546 |
|
|
1547 init_MUTEX(&dev->grossLock); |
|
|
1548 |
|
|
1549 |
|
|
1550 yaffs_GrossLock(dev); |
|
|
1551 |
|
|
1552 err = yaffs_GutsInitialise(dev); |
|
|
1553 |
|
|
1554 T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised %s\n", (err == YAFFS_OK) ? "OK" : "FAILED")); |
|
|
1555 |
|
|
1556 // Create root inode |
|
|
1557 if(err == YAFFS_OK) |
|
|
1558 inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev)); |
|
|
1559 |
|
|
1560 yaffs_GrossUnlock(dev); |
|
|
1561 |
|
|
1562 if (!inode) |
|
|
1563 return NULL; |
|
|
1564 |
|
|
1565 // added NCB |
|
|
1566 inode->i_op = & yaffs_dir_inode_operations; |
|
|
1567 inode->i_fop = & yaffs_dir_operations; |
|
|
1568 |
|
|
1569 T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n")); |
|
|
1570 |
|
|
1571 |
|
|
1572 root = d_alloc_root(inode); |
|
|
1573 |
|
|
1574 T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n")); |
|
|
1575 |
|
|
1576 if (!root) { |
|
|
1577 iput(inode); |
|
|
1578 return NULL; |
|
|
1579 } |
|
|
1580 sb->s_root = root; |
|
|
1581 |
|
|
1582 T(YAFFS_TRACE_OS,("yaffs_read_super: done\n")); |
|
|
1583 return sb; |
|
|
1584 } |
|
|
1585 |
|
|
1586 |
|
|
1587 static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent) |
|
|
1588 { |
|
|
1589 return yaffs_internal_read_super(1,1,sb,data,silent) ? 0 : -1; |
|
|
1590 } |
|
|
1591 static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent) |
|
|
1592 { |
|
|
1593 return yaffs_internal_read_super(1,0,sb,data,silent) ? 0 : -1; |
|
|
1594 } |
|
|
1595 |
|
|
1596 static int yaffs2_internal_read_super_ram(struct super_block * sb, void * data, int silent) |
|
|
1597 { |
|
|
1598 return yaffs_internal_read_super(2,1,sb,data,silent) ? 0 : -1; |
|
|
1599 } |
|
|
1600 static int yaffs2_internal_read_super_mtd(struct super_block * sb, void * data, int silent) |
|
|
1601 { |
|
|
1602 return yaffs_internal_read_super(2,0,sb,data,silent) ? 0 : -1; |
|
|
1603 } |
|
|
1604 |
|
|
1605 |
|
|
1606 |
|
|
1607 #ifdef CONFIG_YAFFS_MTD_ENABLED |
|
|
1608 //#if defined(CONFIG_KERNEL_2_5) |
|
|
1609 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
1610 static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) |
|
|
1611 { |
|
|
1612 |
|
|
1613 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd); |
|
|
1614 } |
|
|
1615 |
|
|
1616 /* changes NCB 2.5.70 */ |
|
|
1617 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV); |
|
|
1618 static struct file_system_type yaffs_fs_type = { |
|
|
1619 .owner = THIS_MODULE, |
|
|
1620 .name = "yaffs", |
|
|
1621 .get_sb = yaffs_read_super, |
|
11
|
1622 .kill_sb = kill_block_super, |
|
|
1623 // .kill_sb = kill_litter_super, |
|
7
|
1624 .fs_flags = FS_REQUIRES_DEV, |
|
|
1625 }; |
|
|
1626 #else |
|
|
1627 static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent) |
|
|
1628 { |
|
|
1629 return yaffs_internal_read_super(1,0,sb,data,silent); |
|
|
1630 } |
|
|
1631 |
|
|
1632 static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV); |
|
|
1633 #endif |
|
|
1634 |
|
|
1635 #endif // CONFIG_YAFFS_MTD_ENABLED |
|
|
1636 |
|
|
1637 #ifdef CONFIG_YAFFS2_MTD_ENABLED |
|
|
1638 |
|
|
1639 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
1640 static struct super_block *yaffs2_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) |
|
|
1641 { |
|
|
1642 |
|
|
1643 return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_mtd); |
|
|
1644 } |
|
|
1645 |
|
|
1646 /* changes NCB 2.5.70 */ |
|
|
1647 //static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV); |
|
|
1648 static struct file_system_type yaffs2_fs_type = { |
|
|
1649 .owner = THIS_MODULE, |
|
|
1650 .name = "yaffs2", |
|
|
1651 .get_sb = yaffs2_read_super, |
|
11
|
1652 .kill_sb = kill_block_super, |
|
|
1653 // .kill_sb = kill_litter_super, |
|
7
|
1654 .fs_flags = FS_REQUIRES_DEV, |
|
|
1655 }; |
|
|
1656 #else |
|
|
1657 static struct super_block *yaffs2_read_super(struct super_block * sb, void * data, int silent) |
|
|
1658 { |
|
|
1659 return yaffs_internal_read_super(2,0,sb,data,silent); |
|
|
1660 } |
|
|
1661 |
|
|
1662 static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, FS_REQUIRES_DEV); |
|
|
1663 #endif |
|
|
1664 |
|
|
1665 #endif // CONFIG_YAFFS2_MTD_ENABLED |
|
|
1666 |
|
|
1667 |
|
|
1668 #ifdef CONFIG_YAFFS_RAM_ENABLED |
|
|
1669 |
|
|
1670 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
|
1671 static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) |
|
|
1672 { |
|
|
1673 |
|
|
1674 return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_ram); |
|
|
1675 } |
|
|
1676 |
|
|
1677 |
|
|
1678 static struct file_system_type yaffs_ram_fs_type = { |
|
|
1679 .owner = THIS_MODULE, |
|
|
1680 .name = "yaffsram", |
|
|
1681 .get_sb = yaffs_ram_read_super, |
|
11
|
1682 .kill_sb = kill_block_super, |
|
|
1683 // .kill_sb = kill_litter_super, |
|
7
|
1684 .fs_flags = FS_SINGLE, |
|
|
1685 }; |
|
|
1686 #else |
|
|
1687 static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent) |
|
|
1688 { |
|
|
1689 return yaffs_internal_read_super(1,1,sb,data,silent); |
|
|
1690 } |
|
|
1691 |
|
|
1692 static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE); |
|
|
1693 #endif |
|
|
1694 |
|
|
1695 #endif // CONFIG_YAFFS_RAM_ENABLED |
|
|
1696 |
|
|
1697 #ifdef CONFIG_YAFFS2_RAM_ENABLED |
|
|
1698 |
|
|
1699 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) |
|
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1700 static struct super_block *yaffs2_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data) |
|
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1701 { |
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1702 |
|
|
1703 return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_ram); |
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1704 } |
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1705 |
|
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1706 |
|
|
1707 static struct file_system_type yaffs2_ram_fs_type = { |
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|
1708 .owner = THIS_MODULE, |
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|
1709 .name = "yaffs2ram", |
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1710 .get_sb = yaffs2_ram_read_super, |
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11
|
1711 .kill_sb = kill_block_super, |
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1712 // .kill_sb = kill_litter_super, |
|
7
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1713 .fs_flags = FS_SINGLE, |
|
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1714 }; |
|
|
1715 #else |
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1716 static struct super_block *yaffs2_ram_read_super(struct super_block * sb, void * data, int silent) |
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1717 { |
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|
1718 return yaffs_internal_read_super(2,1,sb,data,silent); |
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1719 } |
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1720 |
|
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1721 static DECLARE_FSTYPE(yaffs2_ram_fs_type, "yaffs2ram", yaffs2_ram_read_super, FS_SINGLE); |
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1722 #endif |
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1723 |
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1724 #endif // CONFIG_YAFFS2_RAM_ENABLED |
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1725 |
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1726 |
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1727 |
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1728 static struct proc_dir_entry *my_proc_entry; |
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1729 static struct proc_dir_entry *my_proc_ram_write_entry; |
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1730 |
|
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1731 static char * yaffs_dump_dev(char *buf,yaffs_Device *dev,char *name) |
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1732 { |
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|
1733 buf +=sprintf(buf,"\nDevice %s\n",name); |
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|
1734 buf +=sprintf(buf,"startBlock......... %d\n",dev->startBlock); |
|
|
1735 buf +=sprintf(buf,"endBlock........... %d\n",dev->endBlock); |
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|
1736 buf +=sprintf(buf,"chunkGroupBits..... %d\n",dev->chunkGroupBits); |
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|
1737 buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize); |
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|
1738 buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks); |
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|
1739 buf +=sprintf(buf,"nTnodesCreated..... %d\n",dev->nTnodesCreated); |
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|
1740 buf +=sprintf(buf,"nFreeTnodes........ %d\n",dev->nFreeTnodes); |
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|
1741 buf +=sprintf(buf,"nObjectsCreated.... %d\n",dev->nObjectsCreated); |
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|
1742 buf +=sprintf(buf,"nFreeObjects....... %d\n",dev->nFreeObjects); |
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|
1743 buf +=sprintf(buf,"nFreeChunks........ %d\n",dev->nFreeChunks); |
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|
1744 buf +=sprintf(buf,"nPageWrites........ %d\n",dev->nPageWrites); |
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|
1745 buf +=sprintf(buf,"nPageReads......... %d\n",dev->nPageReads); |
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|
1746 buf +=sprintf(buf,"nBlockErasures..... %d\n",dev->nBlockErasures); |
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|
1747 buf +=sprintf(buf,"nGCCopies.......... %d\n",dev->nGCCopies); |
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|
1748 buf +=sprintf(buf,"garbageCollections. %d\n",dev->garbageCollections); |
|
|
1749 buf +=sprintf(buf,"passiveGCs......... %d\n",dev->passiveGarbageCollections); |
|
|
1750 buf +=sprintf(buf,"nRetriedWrites..... %d\n",dev->nRetriedWrites); |
|
|
1751 buf +=sprintf(buf,"nRetireBlocks...... %d\n",dev->nRetiredBlocks); |
|
|
1752 buf +=sprintf(buf,"eccFixed........... %d\n",dev->eccFixed); |
|
|
1753 buf +=sprintf(buf,"eccUnfixed......... %d\n",dev->eccUnfixed); |
|
|
1754 buf +=sprintf(buf,"tagsEccFixed....... %d\n",dev->tagsEccFixed); |
|
|
1755 buf +=sprintf(buf,"tagsEccUnfixed..... %d\n",dev->tagsEccUnfixed); |
|
|
1756 buf +=sprintf(buf,"cacheHits.......... %d\n",dev->cacheHits); |
|
|
1757 buf +=sprintf(buf,"nDeletedFiles...... %d\n",dev->nDeletedFiles); |
|
|
1758 buf +=sprintf(buf,"nUnlinkedFiles..... %d\n",dev->nUnlinkedFiles); |
|
|
1759 buf +=sprintf(buf,"nBackgroudDeletions %d\n",dev->nBackgroundDeletions); |
|
|
1760 buf +=sprintf(buf,"useNANDECC......... %d\n",dev->useNANDECC); |
|
|
1761 buf +=sprintf(buf,"isYaffs2........... %d\n",dev->isYaffs2); |
|
|
1762 |
|
|
1763 |
|
|
1764 return buf; |
|
|
1765 } |
|
|
1766 |
|
|
1767 static int yaffs_proc_read( |
|
|
1768 char *page, |
|
|
1769 char **start, |
|
|
1770 off_t offset, |
|
|
1771 int count, |
|
|
1772 int *eof, |
|
|
1773 void *data |
|
|
1774 ) |
|
|
1775 { |
|
|
1776 |
|
|
1777 char my_buffer[3000]; |
|
|
1778 char *buf; |
|
|
1779 buf = my_buffer; |
|
|
1780 |
|
|
1781 if (offset > 0) return 0; |
|
|
1782 |
|
|
1783 /* Fill the buffer and get its length */ |
|
|
1784 buf +=sprintf(buf,"YAFFS built:"__DATE__ " "__TIME__"\n%s\n%s\n", yaffs_fs_c_version,yaffs_guts_c_version); |
|
|
1785 |
|
|
1786 if(yaffs_dev) buf = yaffs_dump_dev(buf,yaffs_dev,"yaffs"); |
|
|
1787 if(yaffsram_dev) buf = yaffs_dump_dev(buf,yaffsram_dev,"yaffsram"); |
|
|
1788 |
|
|
1789 |
|
|
1790 strcpy(page,my_buffer); |
|
|
1791 return strlen(my_buffer); |
|
|
1792 } |
|
|
1793 |
|
|
1794 |
|
|
1795 static int yaffs_proc_ram_write( |
|
|
1796 char *page, |
|
|
1797 char **start, |
|
|
1798 off_t offset, |
|
|
1799 int count, |
|
|
1800 int *eof, |
|
|
1801 void *data |
|
|
1802 ) |
|
|
1803 { |
|
|
1804 |
|
|
1805 printk(KERN_DEBUG "yaffs write size %d\n",count); |
|
|
1806 return count; |
|
|
1807 } |
|
|
1808 |
|
|
1809 |
|
|
1810 |
|
|
1811 // Stuff to handle installation of file systems |
|
|
1812 struct file_system_to_install |
|
|
1813 { |
|
|
1814 struct file_system_type *fst; |
|
|
1815 int installed; |
|
|
1816 }; |
|
|
1817 |
|
|
1818 static struct file_system_to_install fs_to_install[] = |
|
|
1819 { |
|
|
1820 #ifdef CONFIG_YAFFS_RAM_ENABLED |
|
|
1821 { &yaffs_ram_fs_type, 0}, |
|
|
1822 #endif |
|
|
1823 #ifdef CONFIG_YAFFS2_RAM_ENABLED |
|
|
1824 { &yaffs2_ram_fs_type,0}, |
|
|
1825 #endif |
|
|
1826 #ifdef CONFIG_YAFFS_MTD_ENABLED |
|
|
1827 { &yaffs_fs_type,0}, |
|
|
1828 #endif |
|
|
1829 #ifdef CONFIG_YAFFS2_MTD_ENABLED |
|
|
1830 { &yaffs2_fs_type,0}, |
|
|
1831 #endif |
|
|
1832 { NULL,0} |
|
|
1833 }; |
|
|
1834 |
|
|
1835 static int __init init_yaffs_fs(void) |
|
|
1836 { |
|
|
1837 int error = 0; |
|
|
1838 struct file_system_to_install *fsinst; |
|
|
1839 |
|
|
1840 yaffs_dev = yaffsram_dev = NULL; |
|
|
1841 |
|
|
1842 T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " Installing. \n")); |
|
|
1843 |
|
|
1844 |
|
|
1845 |
|
|
1846 /* Install the proc_fs entry */ |
|
|
1847 my_proc_entry = create_proc_read_entry("yaffs", |
|
|
1848 S_IRUGO | S_IFREG, |
|
|
1849 &proc_root, |
|
|
1850 yaffs_proc_read, |
|
|
1851 NULL); |
|
|
1852 if(!my_proc_entry) |
|
|
1853 { |
|
|
1854 return -ENOMEM; |
|
|
1855 } |
|
|
1856 |
|
|
1857 |
|
|
1858 |
|
|
1859 // Now add the file system entries |
|
|
1860 |
|
|
1861 fsinst = fs_to_install; |
|
|
1862 |
|
|
1863 while(fsinst->fst && !error) |
|
|
1864 { |
|
|
1865 error = register_filesystem(fsinst->fst); |
|
|
1866 if(!error) |
|
|
1867 { |
|
|
1868 fsinst->installed = 1; |
|
|
1869 } |
|
|
1870 fsinst++; |
|
|
1871 } |
|
|
1872 |
|
|
1873 // Any errors? uninstall |
|
|
1874 if(error) |
|
|
1875 { |
|
|
1876 fsinst = fs_to_install; |
|
|
1877 |
|
|
1878 while(fsinst->fst) |
|
|
1879 { |
|
|
1880 if(fsinst->installed) |
|
|
1881 { |
|
|
1882 unregister_filesystem(fsinst->fst); |
|
|
1883 fsinst->installed = 0; |
|
|
1884 } |
|
|
1885 fsinst++; |
|
|
1886 } |
|
|
1887 } |
|
|
1888 |
|
|
1889 return error; |
|
|
1890 } |
|
|
1891 |
|
|
1892 static void __exit exit_yaffs_fs(void) |
|
|
1893 { |
|
|
1894 |
|
|
1895 struct file_system_to_install *fsinst; |
|
|
1896 |
|
|
1897 T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " removing. \n")); |
|
|
1898 |
|
|
1899 remove_proc_entry("yaffs",&proc_root); |
|
|
1900 |
|
|
1901 fsinst = fs_to_install; |
|
|
1902 |
|
|
1903 while(fsinst->fst) |
|
|
1904 { |
|
|
1905 if(fsinst->installed) |
|
|
1906 { |
|
|
1907 unregister_filesystem(fsinst->fst); |
|
|
1908 fsinst->installed = 0; |
|
|
1909 } |
|
|
1910 fsinst++; |
|
|
1911 } |
|
|
1912 |
|
|
1913 } |
|
|
1914 |
|
|
1915 module_init(init_yaffs_fs) |
|
|
1916 module_exit(exit_yaffs_fs) |
|
|
1917 |
|
|
1918 MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); |
|
|
1919 MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002,2003,2004"); |
|
|
1920 MODULE_LICENSE("GPL"); |
|
|
1921 |
|
13
|
1922 |
