Mercurial > flash_v2

annotate packages/io/fileio/current/include/fileio.h @ 130:eb9fd8c04db3 ecos-sw-2000-10-23

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Merge from eCos master repository on 2000-10-23-17:01:37-BST
author jlarmour
date Mon, 23 Oct 2000 17:10:57 +0000
parents 0c2b7be0d798
children e0c0827131d1
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1 #ifndef CYGONCE_FILEIO_H
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2 #define CYGONCE_FILEIO_H
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3 //=============================================================================
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4 //
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5 // fileio.h
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6 //
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7 // Fileio header
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8 //
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9 //=============================================================================
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10 //####COPYRIGHTBEGIN####
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11 //
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12 // -------------------------------------------
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13 // The contents of this file are subject to the Red Hat eCos Public License
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14 // Version 1.1 (the "License"); you may not use this file except in
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15 // compliance with the License. You may obtain a copy of the License at
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16 // http://www.redhat.com/
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17 //
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18 // Software distributed under the License is distributed on an "AS IS"
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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20 // License for the specific language governing rights and limitations under
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21 // the License.
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22 //
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23 // The Original Code is eCos - Embedded Configurable Operating System,
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24 // released September 30, 1998.
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25 //
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26 // The Initial Developer of the Original Code is Red Hat.
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27 // Portions created by Red Hat are
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28 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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29 // All Rights Reserved.
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30 // -------------------------------------------
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31 //
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32 //####COPYRIGHTEND####
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33 //=============================================================================
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34 //#####DESCRIPTIONBEGIN####
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35 //
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36 // Author(s): nickg
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37 // Contributors: nickg
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38 // Date: 2000-05-25
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39 // Purpose: Fileio header
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40 // Description: This header contains the external definitions of the general file
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41 // IO subsystem for POSIX and EL/IX compatability.
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42 //
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43 // Usage:
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44 // #include <fileio.h>
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45 // ...
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46 //
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47 //
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48 //####DESCRIPTIONEND####
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49 //
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50 //=============================================================================
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51
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52 #include <pkgconf/hal.h>
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53 #include <pkgconf/kernel.h>
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54 #include <pkgconf/io_fileio.h>
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55
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56 #include <cyg/infra/cyg_type.h>
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57 #include <cyg/hal/hal_tables.h>
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58
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59 #include <stddef.h> // NULL, size_t
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60 #include <limits.h>
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61 #include <sys/types.h>
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62 #include <fcntl.h>
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63 #include <sys/stat.h>
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64
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65 //=============================================================================
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66 // forward definitions
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67
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68 struct cyg_mtab_entry;
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69 typedef struct cyg_mtab_entry cyg_mtab_entry;
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70
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71 struct cyg_fstab_entry;
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72 typedef struct cyg_fstab_entry cyg_fstab_entry;
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73
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74 struct CYG_FILEOPS_TAG;
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75 typedef struct CYG_FILEOPS_TAG cyg_fileops;
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76
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77 struct CYG_FILE_TAG;
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78 typedef struct CYG_FILE_TAG cyg_file;
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79
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80 struct CYG_IOVEC_TAG;
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81 typedef struct CYG_IOVEC_TAG cyg_iovec;
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82
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83 struct CYG_UIO_TAG;
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84 typedef struct CYG_UIO_TAG cyg_uio;
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85
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86 struct CYG_SELINFO_TAG;
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87 typedef struct CYG_SELINFO_TAG cyg_selinfo;
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88
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89 //=============================================================================
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90 // Directory pointer
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91
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92 typedef CYG_ADDRWORD cyg_dir;
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93
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94 #define CYG_DIR_NULL 0
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95
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96 //=============================================================================
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97 // Filesystem table entry
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98
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99 typedef int cyg_fsop_mount ( cyg_fstab_entry *fste, cyg_mtab_entry *mte );
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100 typedef int cyg_fsop_umount ( cyg_mtab_entry *mte );
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101 typedef int cyg_fsop_open ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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102 int mode, cyg_file *fte );
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103 typedef int cyg_fsop_unlink ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );
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104 typedef int cyg_fsop_mkdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );
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105 typedef int cyg_fsop_rmdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name );
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106 typedef int cyg_fsop_rename ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,
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107 cyg_dir dir2, const char *name2 );
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108 typedef int cyg_fsop_link ( cyg_mtab_entry *mte, cyg_dir dir1, const char *name1,
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109 cyg_dir dir2, const char *name2, int type );
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110 typedef int cyg_fsop_opendir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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111 cyg_file *fte );
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112 typedef int cyg_fsop_chdir ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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113 cyg_dir *dir_out );
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114 typedef int cyg_fsop_stat ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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115 struct stat *buf);
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116 typedef int cyg_fsop_getinfo ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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117 int key, void *buf, int len );
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118 typedef int cyg_fsop_setinfo ( cyg_mtab_entry *mte, cyg_dir dir, const char *name,
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119 int key, void *buf, int len );
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120
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121
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122 struct cyg_fstab_entry
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123 {
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124 const char *name; // filesystem name
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125 CYG_ADDRWORD data; // private data value
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126 cyg_uint32 syncmode; // synchronization mode
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127
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128 cyg_fsop_mount *mount;
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129 cyg_fsop_umount *umount;
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130 cyg_fsop_open *open;
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131 cyg_fsop_unlink *unlink;
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132 cyg_fsop_mkdir *mkdir;
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133 cyg_fsop_rmdir *rmdir;
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134 cyg_fsop_rename *rename;
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135 cyg_fsop_link *link;
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136 cyg_fsop_opendir *opendir;
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137 cyg_fsop_chdir *chdir;
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138 cyg_fsop_stat *stat;
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139 cyg_fsop_getinfo *getinfo;
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140 cyg_fsop_setinfo *setinfo;
121
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141 } CYG_HAL_TABLE_TYPE;
115
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142
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143 //-----------------------------------------------------------------------------
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144 // Keys for getinfo() and setinfo()
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145
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146 #define FS_INFO_CONF 1 /* pathconf() */
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147 #define FS_INFO_ACCESS 2 /* access() */
128
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148 #define FS_INFO_GETCWD 3 /* getcwd() */
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149
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150 //-----------------------------------------------------------------------------
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151 // Types for link()
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152
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153 #define CYG_FSLINK_HARD 1 /* form a hard link */
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154 #define CYG_FSLINK_SOFT 2 /* form a soft link */
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155
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156 //-----------------------------------------------------------------------------
128
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157 // getinfo() and setinfo() buffers structures.
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158
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159 struct cyg_getcwd_info
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160 {
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161 char *buf; /* buffer for cwd string */
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162 size_t size; /* size of buffer */
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163 };
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164
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165 //-----------------------------------------------------------------------------
115
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166 // Macro to define an initialized fstab entry
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167
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168 #define FSTAB_ENTRY( _l, _name, _data, _syncmode, _mount, _umount, \
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169 _open, _unlink, _mkdir, _rmdir, _rename, _link, \
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170 _opendir, _chdir, _stat, _getinfo, _setinfo) \
124
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171 struct cyg_fstab_entry _l CYG_HAL_TABLE_ENTRY(fstab) = \
115
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172 { \
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173 _name, \
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174 _data, \
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175 _syncmode, \
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176 _mount, \
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177 _umount, \
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178 _open, \
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179 _unlink, \
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180 _mkdir, \
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181 _rmdir, \
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182 _rename, \
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183 _link, \
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184 _opendir, \
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185 _chdir, \
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186 _stat, \
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187 _getinfo, \
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188 _setinfo \
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189 };
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190
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191 //=============================================================================
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192 // Mount table entry
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193
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194 struct cyg_mtab_entry
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195 {
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196 const char *name; // name of mount point
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197 const char *fsname; // name of implementing filesystem
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198 const char *devname; // name of hardware device
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199 CYG_ADDRWORD data; // private data value
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200
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201 // The following are filled in after a successful mount operation
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202 cyg_bool valid; // Valid entry?
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203 cyg_fstab_entry *fs; // pointer to fstab entry
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204 cyg_dir root; // root directory pointer
121
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205 } CYG_HAL_TABLE_TYPE;
115
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206
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207
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208 // This macro defines an initialized mtab entry
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209
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210 #define MTAB_ENTRY( _l, _name, _fsname, _devname, _data ) \
124
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211 struct cyg_mtab_entry _l CYG_HAL_TABLE_ENTRY(mtab) = \
115
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212 { \
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213 _name, \
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214 _fsname, \
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215 _devname, \
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216 _data, \
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217 false, \
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218 NULL, \
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219 CYG_DIR_NULL \
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220 };
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221
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222 //=============================================================================
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223 // IO vector descriptors
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224
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225 struct CYG_IOVEC_TAG
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226 {
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227 void *iov_base; /* Base address. */
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228 ssize_t iov_len; /* Length. */
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229 };
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230
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231 enum cyg_uio_rw { UIO_READ, UIO_WRITE };
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232
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233 /* Segment flag values. */
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234 enum cyg_uio_seg
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235 {
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236 UIO_USERSPACE, /* from user data space */
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237 UIO_SYSSPACE /* from system space */
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238 };
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239
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240 struct CYG_UIO_TAG
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241 {
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242 struct CYG_IOVEC_TAG *uio_iov; /* pointer to array of iovecs */
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243 int uio_iovcnt; /* number of iovecs in array */
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244 off_t uio_offset; /* offset into file this uio corresponds to */
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245 ssize_t uio_resid; /* residual i/o count */
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246 enum cyg_uio_seg uio_segflg; /* see above */
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247 enum cyg_uio_rw uio_rw; /* see above */
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248 };
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249
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250 // Limits
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251 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
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252
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253 //=============================================================================
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254 // Description of open file
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255
130
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256 typedef int cyg_fileop_readwrite (struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);
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257 typedef cyg_fileop_readwrite cyg_fileop_read;
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258 typedef cyg_fileop_readwrite cyg_fileop_write;
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259 typedef int cyg_fileop_lseek (struct CYG_FILE_TAG *fp, off_t *pos, int whence );
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260 typedef int cyg_fileop_ioctl (struct CYG_FILE_TAG *fp, CYG_ADDRWORD com,
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261 CYG_ADDRWORD data);
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262 typedef int cyg_fileop_select (struct CYG_FILE_TAG *fp, int which, CYG_ADDRWORD info);
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263 typedef int cyg_fileop_fsync (struct CYG_FILE_TAG *fp, int mode );
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264 typedef int cyg_fileop_close (struct CYG_FILE_TAG *fp);
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265 typedef int cyg_fileop_fstat (struct CYG_FILE_TAG *fp, struct stat *buf );
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266 typedef int cyg_fileop_getinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len );
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267 typedef int cyg_fileop_setinfo (struct CYG_FILE_TAG *fp, int key, void *buf, int len );
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268
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269 struct CYG_FILEOPS_TAG
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270 {
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271 cyg_fileop_read *fo_read;
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272 cyg_fileop_write *fo_write;
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273 cyg_fileop_lseek *fo_lseek;
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274 cyg_fileop_ioctl *fo_ioctl;
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275 cyg_fileop_select *fo_select;
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276 cyg_fileop_fsync *fo_fsync;
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277 cyg_fileop_close *fo_close;
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278 cyg_fileop_fstat *fo_fstat;
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279 cyg_fileop_getinfo *fo_getinfo;
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280 cyg_fileop_setinfo *fo_setinfo;
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281 };
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282
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283 struct CYG_FILE_TAG
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284 {
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285 cyg_uint32 f_flag; /* file state */
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286 cyg_uint16 f_ucount; /* use count */
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287 cyg_uint16 f_type; /* descriptor type */
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288 cyg_uint32 f_syncmode; /* synchronization protocol */
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289 struct CYG_FILEOPS_TAG *f_ops; /* file operations */
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290 off_t f_offset; /* current offset */
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291 CYG_ADDRWORD f_data; /* file or socket */
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292 CYG_ADDRWORD f_xops; /* extra type specific ops */
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293 cyg_mtab_entry *f_mte; /* mount table entry */
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294 };
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295
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296 //-----------------------------------------------------------------------------
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297 // File flags
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298
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299 // Allocation here is that bits 0..15 are copies of bits from the open
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300 // flags, bits 16..23 are extra bits that are visible to filesystems but
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301 // are not derived from the open call, and bits 24..31 are reserved for
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302 // the fileio infrastructure.
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303 #define CYG_FREAD O_RDONLY
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304 #define CYG_FWRITE O_WRONLY
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305 #define CYG_FNONBLOCK O_NONBLOCK
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306 #define CYG_FAPPEND O_APPEND
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307 #define CYG_FASYNC 0x00010000
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308 #define CYG_FDIR 0x00020000
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309
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310 #define CYG_FLOCKED 0x01000000 // Set if file is locked
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311 #define CYG_FLOCK 0x02000000 // Lock during file ops
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312 #define CYG_FALLOC 0x80000000 // File is "busy", i.e. allocated
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313
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314 // Mask for open mode bits stored in file object
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315 #define CYG_FILE_MODE_MASK (CYG_FREAD|CYG_FWRITE|CYG_FNONBLOCK|CYG_FAPPEND)
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316
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317 //-----------------------------------------------------------------------------
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318 // Type of file
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319
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320 #define CYG_FILE_TYPE_FILE 1 /* file */
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321 #define CYG_FILE_TYPE_SOCKET 2 /* communications endpoint */
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322 #define CYG_FILE_TYPE_DEVICE 3 /* device */
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323
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324 //-----------------------------------------------------------------------------
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325 // Keys for getinf() and setinfo()
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326
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327 #define FILE_INFO_CONF 1 /* fpathconf() */
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328
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329 //-----------------------------------------------------------------------------
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330 // Modes for fsync()
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331
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332 #define CYG_FSYNC 1
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333 #define CYG_FDATASYNC 2
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334
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335 //-----------------------------------------------------------------------------
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336 // Get/set info buffer structures
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337
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338 // This is used for pathconf() and fpathconf()
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339 struct cyg_pathconf_info
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340 {
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341 int name; // POSIX defined variable name
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342 long value; // Returned variable value
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343 };
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344
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345 //=============================================================================
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346 // Synchronization modes
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347 // These values are filled into the syncmode fields of the above structures
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348 // and define the synchronization protocol used when accessing the object in
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349 // question.
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350
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351 #define CYG_SYNCMODE_NONE (0) // no locking required
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352
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353 #define CYG_SYNCMODE_FILE_FILESYSTEM 0x0002 // lock fs during file ops
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354 #define CYG_SYNCMODE_FILE_MOUNTPOINT 0x0004 // lock mte during file ops
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355 #define CYG_SYNCMODE_IO_FILE 0x0010 // lock file during io ops
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356 #define CYG_SYNCMODE_IO_FILESYSTEM 0x0020 // lock fs during io ops
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357 #define CYG_SYNCMODE_IO_MOUNTPOINT 0x0040 // lock mte during io ops
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358 #define CYG_SYNCMODE_SOCK_FILE 0x0100 // lock socket during socket ops
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359 #define CYG_SYNCMODE_SOCK_NETSTACK 0x0800 // lock netstack during socket ops
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360
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361 #define CYG_SYNCMODE_IO_SHIFT (4) // shift for IO to file bits
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362 #define CYG_SYNCMODE_SOCK_SHIFT (8) // shift for sock to file bits
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363
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364 //=============================================================================
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365 // Mount and umount functions
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366
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367 __externC int mount( const char *devname,
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368 const char *dir,
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369 const char *fsname);
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370
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371 __externC int umount( const char *name);
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372
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373 //=============================================================================
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374 // Select support
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375
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376 //-----------------------------------------------------------------------------
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377 // Data structure for embedding in client data structures. A pointer to this
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378 // must be passed to cyg_selrecord() and cyg_selwakeup().
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379
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380 struct CYG_SELINFO_TAG
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381 {
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382 CYG_ADDRWORD si_info; // info passed through from fo_select()
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383 CYG_ADDRESS si_thread; // selecting thread pointer
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384 };
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385
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386 //-----------------------------------------------------------------------------
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387 // Select support functions.
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388
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389 // cyg_selinit() is used to initialize a selinfo structure.
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390 __externC void cyg_selinit( struct CYG_SELINFO_TAG *sip );
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391
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392 // cyg_selrecord() is called when a client device needs to register
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393 // the current thread for selection.
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394 __externC void cyg_selrecord( CYG_ADDRWORD info, struct CYG_SELINFO_TAG *sip );
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395
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396 // cyg_selwakeup() is called when the client device matches the select
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397 // criterion, and needs to wake up a selector.
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398 __externC void cyg_selwakeup( struct CYG_SELINFO_TAG *sip );
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399
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400 //=============================================================================
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401 // Timestamp support
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402
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403 // Provides the current time as a time_t timestamp for use in filesystem
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404 // data strucures.
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405
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406 __externC time_t cyg_timestamp(void);
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407
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408 //=============================================================================
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409 // Default functions.
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410 // Cast to the appropriate type, these functions can be put into any of
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411 // the operation table slots to provide the defined error code.
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412
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413 __externC int cyg_fileio_enosys(void);
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414 __externC int cyg_fileio_erofs(void);
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415 __externC int cyg_fileio_enoerr(void);
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416 __externC int cyg_fileio_enotdir(void);
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417 __externC cyg_fileop_select cyg_fileio_seltrue;
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418
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419 //-----------------------------------------------------------------------------
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420 #endif // ifndef CYGONCE_FILEIO_H
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421 // End of fileio.h