1 | /* |
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2 | * JFFS2 -- Journalling Flash File System, Version 2. |
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3 | * |
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4 | * Copyright © 2002-2003 Free Software Foundation, Inc. |
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5 | * Copyright © 2013 embedded brains GmbH & Co. KG |
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6 | * |
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7 | * Created by David Woodhouse <dwmw2@cambridge.redhat.com> |
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8 | * |
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9 | * Port to the RTEMS by embedded brains GmbH & Co. KG |
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10 | * |
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11 | * For licensing information, see the file 'LICENCE' in this directory. |
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12 | * |
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13 | * $Id: os-ecos.h,v 1.24 2005/02/09 09:23:55 pavlov Exp $ |
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14 | * |
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15 | */ |
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16 | |
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17 | #ifndef __JFFS2_OS_RTEMS_H__ |
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18 | #define __JFFS2_OS_RTEMS_H__ |
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19 | |
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20 | #include <asm/atomic.h> |
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21 | #include <asm/bug.h> |
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22 | #include <linux/compiler.h> |
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23 | #include <linux/list.h> |
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24 | #include <linux/pagemap.h> |
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25 | #include <linux/stat.h> |
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26 | #include <linux/types.h> |
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27 | #include <sys/uio.h> |
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28 | #include <dirent.h> |
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29 | #include <errno.h> |
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30 | #include <fcntl.h> |
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31 | #include <string.h> |
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32 | #include <time.h> |
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33 | |
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34 | #include <rtems/jffs2.h> |
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35 | #include <rtems/thread.h> |
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36 | |
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37 | #define CONFIG_JFFS2_RTIME |
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38 | |
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39 | #define CONFIG_JFFS2_ZLIB |
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40 | |
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41 | struct _inode; |
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42 | struct super_block; |
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43 | |
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44 | static inline unsigned int full_name_hash(const void *salt, const unsigned char * name, size_t len) { |
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45 | |
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46 | uint32_t hash = 0; |
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47 | (void)salt; |
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48 | while (len--) { |
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49 | hash = (hash << 4) | (hash >> 28); |
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50 | hash ^= *(name++); |
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51 | } |
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52 | return hash; |
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53 | } |
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54 | |
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55 | #define container_of(a, b, c) RTEMS_CONTAINER_OF(a, b, c) |
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56 | |
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57 | #define JFFS2_INODE_INFO(i) (&(i)->jffs2_i) |
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58 | #define OFNI_EDONI_2SFFJ(f) RTEMS_CONTAINER_OF(f, struct _inode, jffs2_i) |
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59 | |
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60 | #define ITIME(sec) (sec) |
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61 | #define I_SEC(tv) (tv) |
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62 | |
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63 | #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) |
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64 | #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) |
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65 | #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid) |
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66 | #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) |
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67 | #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime) |
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68 | #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime) |
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69 | #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime) |
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70 | |
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71 | #define get_seconds() time(NULL) |
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72 | |
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73 | struct _inode { |
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74 | cyg_uint32 i_ino; |
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75 | |
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76 | int i_count; |
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77 | mode_t i_mode; |
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78 | nlink_t i_nlink; // Could we dispense with this? |
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79 | uid_t i_uid; |
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80 | gid_t i_gid; |
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81 | time_t i_atime; |
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82 | time_t i_mtime; |
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83 | time_t i_ctime; |
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84 | // union { |
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85 | unsigned short i_rdev; // For devices only |
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86 | struct _inode * i_parent; // For directories only |
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87 | off_t i_size; // For files only |
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88 | // }; |
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89 | struct super_block * i_sb; |
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90 | struct jffs2_full_dirent * i_fd; |
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91 | |
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92 | struct jffs2_inode_info jffs2_i; |
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93 | |
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94 | struct _inode * i_cache_prev; // We need doubly-linked? |
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95 | struct _inode * i_cache_next; |
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96 | }; |
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97 | |
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98 | #define JFFS2_SB_INFO(sb) (&(sb)->jffs2_sb) |
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99 | #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->jffs2_sb)) ) ) |
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100 | |
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101 | struct super_block { |
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102 | struct jffs2_sb_info jffs2_sb; |
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103 | /* |
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104 | * If granular locking is ever enabled for JFFS2, the inode cache |
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105 | * (s_root) needs to be protected due to NAND delayed writes. |
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106 | */ |
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107 | struct _inode * s_root; |
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108 | rtems_jffs2_flash_control *s_flash_control; |
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109 | rtems_jffs2_compressor_control *s_compressor_control; |
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110 | bool s_is_readonly; |
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111 | unsigned char s_gc_buffer[PAGE_CACHE_SIZE]; // Avoids malloc when user may be under memory pressure |
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112 | rtems_recursive_mutex s_mutex; |
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113 | char s_name_buf[JFFS2_MAX_NAME_LEN]; |
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114 | uint32_t s_flags; |
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115 | }; |
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116 | |
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117 | #define sleep_on_spinunlock(wq, sl) spin_unlock(sl) |
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118 | #define EBADFD 32767 |
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119 | |
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120 | static inline bool jffs2_is_readonly(struct jffs2_sb_info *c) |
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121 | { |
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122 | struct super_block *sb = OFNI_BS_2SFFJ(c); |
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123 | |
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124 | return sb->s_is_readonly; |
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125 | } |
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126 | |
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127 | static inline void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c) |
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128 | { |
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129 | const struct super_block *sb = OFNI_BS_2SFFJ(c); |
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130 | rtems_jffs2_flash_control *fc = sb->s_flash_control; |
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131 | |
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132 | if (fc->trigger_garbage_collection != NULL) { |
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133 | (*fc->trigger_garbage_collection)(fc); |
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134 | } |
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135 | } |
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136 | |
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137 | /* fs-rtems.c */ |
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138 | struct _inode *jffs2_new_inode (struct _inode *dir_i, int mode, struct jffs2_raw_inode *ri); |
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139 | struct _inode *jffs2_iget(struct super_block *sb, cyg_uint32 ino); |
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140 | void jffs2_iput(struct _inode * i); |
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141 | void jffs2_gc_release_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); |
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142 | struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, int inum, int nlink); |
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143 | |
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144 | /* Avoid polluting RTEMS namespace with names not starting in jffs2_ */ |
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145 | #define os_to_jffs2_mode(x) jffs2_from_os_mode(x) |
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146 | static inline uint32_t jffs2_from_os_mode(uint32_t osmode) |
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147 | { |
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148 | return osmode & (S_IFMT | S_IRWXU | S_IRWXG | S_IRWXO); |
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149 | } |
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150 | |
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151 | static inline uint32_t jffs2_to_os_mode (uint32_t jmode) |
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152 | { |
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153 | return jmode & (S_IFMT | S_IRWXU | S_IRWXG | S_IRWXO); |
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154 | } |
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155 | |
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156 | |
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157 | /* flashio.c */ |
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158 | int jffs2_flash_read(struct jffs2_sb_info *c, loff_t read_buffer_offset, |
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159 | size_t size, size_t * return_size, unsigned char * write_buffer); |
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160 | int jffs2_flash_write(struct jffs2_sb_info *c, loff_t write_buffer_offset, |
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161 | size_t size, size_t * return_size, const unsigned char * read_buffer); |
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162 | int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct iovec *vecs, |
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163 | unsigned long count, loff_t to, size_t *retlen); |
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164 | int jffs2_flash_erase(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
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165 | int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); |
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166 | int jffs2_flash_direct_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); |
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167 | |
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168 | // dir-rtems.c |
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169 | struct _inode *jffs2_lookup(struct _inode *dir_i, const unsigned char *name, size_t namelen); |
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170 | int jffs2_create(struct _inode *dir_i, const char *d_name, size_t d_namelen, int mode); |
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171 | int jffs2_mknod(struct _inode *dir_i, const unsigned char *d_name, size_t d_namelen, int mode, const unsigned char *data, size_t datalen); |
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172 | int jffs2_link (struct _inode *old_d_inode, struct _inode *dir_i, const unsigned char *d_name, size_t d_namelen); |
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173 | int jffs2_unlink(struct _inode *dir_i, struct _inode *d_inode, const unsigned char *d_name, size_t d_namelen); |
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174 | int jffs2_rmdir (struct _inode *dir_i, struct _inode *d_inode, const unsigned char *d_name, size_t d_namelen); |
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175 | int jffs2_rename (struct _inode *old_dir_i, struct _inode *d_inode, const unsigned char *old_d_name, size_t old_d_namelen, |
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176 | struct _inode *new_dir_i, const unsigned char *new_d_name, size_t new_d_namelen); |
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177 | |
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178 | /* erase.c */ |
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179 | static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) |
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180 | { } |
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181 | |
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182 | #define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) ) |
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183 | #ifndef CONFIG_JFFS2_FS_WRITEBUFFER |
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184 | |
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185 | #define jffs2_can_mark_obsolete(c) (1) |
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186 | #define jffs2_is_writebuffered(c) (0) |
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187 | #define jffs2_cleanmarker_oob(c) (0) |
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188 | #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) |
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189 | |
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190 | #define jffs2_flush_wbuf_pad(c) (c=c) |
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191 | #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; }) |
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192 | #define jffs2_nand_read_failcnt(c,jeb) do { ; } while(0) |
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193 | #define jffs2_write_nand_badblock(c,jeb,p) (0) |
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194 | #define jffs2_flash_setup(c) (0) |
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195 | #define jffs2_nand_flash_cleanup(c) do {} while(0) |
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196 | #define jffs2_wbuf_dirty(c) (0) |
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197 | #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) |
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198 | #define jffs2_wbuf_timeout NULL |
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199 | #define jffs2_wbuf_process NULL |
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200 | #define jffs2_nor_ecc(c) (0) |
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201 | #else /* CONFIG_JFFS2_FS_WRITEBUFFER */ |
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202 | /* dirty_writeback_interval is in centiseconds, 500cs == 5s */ |
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203 | #define dirty_writeback_interval 500 |
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204 | #define MTD_BIT_WRITEABLE 0x800 |
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205 | #define jffs2_is_writebuffered(c) (c->wbuf != NULL) |
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206 | |
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207 | #define jffs2_can_mark_obsolete(c) (OFNI_BS_2SFFJ(c)->s_flash_control->block_is_bad == NULL) |
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208 | |
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209 | #define jffs2_cleanmarker_oob(c) (OFNI_BS_2SFFJ(c)->s_flash_control->block_is_bad != NULL) |
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210 | |
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211 | #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) |
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212 | |
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213 | /* wbuf.c */ |
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214 | int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino); |
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215 | int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); |
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216 | int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
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217 | int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
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218 | int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); |
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219 | void jffs2_wbuf_timeout(unsigned long data); |
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220 | void jffs2_wbuf_process(void *data); |
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221 | int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); |
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222 | int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); |
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223 | int jffs2_nand_flash_setup(struct jffs2_sb_info *c); |
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224 | void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); |
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225 | int jffs2_flash_block_is_bad(struct jffs2_sb_info * c, |
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226 | cyg_uint32 block_offset, |
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227 | bool *bad); |
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228 | int jffs2_flash_block_mark_bad(struct jffs2_sb_info * c, |
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229 | cyg_uint32 block_offset); |
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230 | int jffs2_flash_oob_write(struct jffs2_sb_info * c, |
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231 | cyg_uint32 block_offset, |
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232 | uint8_t *oobbuf, |
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233 | uint32_t ooblen); |
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234 | int jffs2_flash_oob_read(struct jffs2_sb_info * c, |
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235 | cyg_uint32 block_offset, |
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236 | uint8_t *oobbuf, |
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237 | uint32_t ooblen); |
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238 | int jffs2_flash_get_oob_size(struct jffs2_sb_info * c); |
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239 | |
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240 | int jffs2_dataflash_setup(struct jffs2_sb_info *c); |
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241 | void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); |
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242 | int jffs2_ubivol_setup(struct jffs2_sb_info *c); |
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243 | void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); |
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244 | |
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245 | int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); |
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246 | void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); |
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247 | void jffs2_dirty_trigger(struct jffs2_sb_info *c); |
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248 | |
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249 | #endif /* CONFIG_JFFS2_FS_WRITEBUFFER */ |
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250 | |
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251 | #ifndef BUG_ON |
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252 | #define BUG_ON(x) do { if (unlikely(x)) BUG(); } while(0) |
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253 | #endif |
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254 | |
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255 | #define __init |
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256 | |
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257 | #endif /* __JFFS2_OS_RTEMS_H__ */ |
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