1 | /* |
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2 | * vfs.c - Virtual File System implementation. |
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3 | * |
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4 | * Author Mohamed Lamine Karaoui (2014,2015) |
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5 | * Alain Greiner (2016,2017,2018,2019,2020) |
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6 | * |
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7 | * Copyright (c) UPMC Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH. |
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10 | * |
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11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <kernel_config.h> |
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26 | #include <hal_kernel_types.h> |
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27 | #include <hal_atomic.h> |
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28 | #include <hal_special.h> |
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29 | #include <printk.h> |
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30 | #include <list.h> |
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31 | #include <xlist.h> |
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32 | #include <slist.h> |
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33 | #include <xhtab.h> |
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34 | #include <string.h> |
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35 | #include <errno.h> |
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36 | #include <kmem.h> |
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37 | #include <mapper.h> |
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38 | #include <thread.h> |
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39 | #include <chdev.h> |
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40 | #include <pipe.h> |
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41 | #include <process.h> |
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42 | #include <cluster.h> |
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43 | #include <vfs.h> |
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44 | #include <fatfs.h> |
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45 | #include <ramfs.h> |
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46 | #include <devfs.h> |
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47 | #include <syscalls.h> |
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48 | |
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49 | ////////////////////////////////////////////////////////////////////////////////////////// |
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50 | // Extern global variables |
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51 | ////////////////////////////////////////////////////////////////////////////////////////// |
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52 | |
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53 | extern vfs_ctx_t fs_context[FS_TYPES_NR]; // allocated in kernel_init.c |
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54 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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55 | extern char * lock_type_str[]; // allocated in kernel_init.c |
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56 | extern process_t process_zero; // allocated in kernel_init.c |
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57 | |
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58 | /////////////////////////////////////////////////////////////////////////////////////////// |
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59 | // VFS Context related functions |
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60 | ////////////////////////////////////////////////////////////////////////////////////////// |
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61 | |
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62 | /////////////////////////////////////// |
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63 | void vfs_ctx_init( cxy_t cxy, |
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64 | vfs_fs_type_t fs_type, |
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65 | uint32_t total_clusters, |
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66 | uint32_t cluster_size, |
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67 | xptr_t vfs_root_xp, |
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68 | void * extend ) |
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69 | { |
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70 | // get pointer on relevant VFS context (same in all clusters) |
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71 | vfs_ctx_t * vfs_ctx_ptr = &fs_context[fs_type]; |
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72 | |
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73 | // initialise VFS context fields |
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74 | hal_remote_s32( XPTR( cxy , &vfs_ctx_ptr->type ) , fs_type ); |
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75 | hal_remote_s32( XPTR( cxy , &vfs_ctx_ptr->total_clusters ) , total_clusters ); |
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76 | hal_remote_s32( XPTR( cxy , &vfs_ctx_ptr->cluster_size ) , cluster_size ); |
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77 | hal_remote_s64( XPTR( cxy , &vfs_ctx_ptr->vfs_root_xp ) , vfs_root_xp ); |
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78 | hal_remote_spt( XPTR( cxy , &vfs_ctx_ptr->extend ) , extend ); |
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79 | |
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80 | // initialize VFS context lock |
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81 | remote_busylock_init( XPTR( cxy , &vfs_ctx_ptr->lock ) , LOCK_VFS_CTX ); |
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82 | |
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83 | // initialize inum allocator |
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84 | bitmap_remote_init( XPTR( cxy , &vfs_ctx_ptr->bitmap ), |
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85 | BITMAP_SIZE(CONFIG_VFS_MAX_INODES) ); |
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86 | |
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87 | } // end vfs_ctx_init() |
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88 | |
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89 | /////////////////////////////////////////////// |
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90 | error_t vfs_ctx_inum_alloc( xptr_t ctx_xp, |
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91 | uint32_t * inum ) |
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92 | { |
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93 | // get context cluster and local pointer |
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94 | cxy_t ctx_cxy = GET_CXY( ctx_xp ); |
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95 | vfs_ctx_t * ctx_ptr = GET_PTR( ctx_xp ); |
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96 | |
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97 | // build extended pointer on lock protecting the inum allocator |
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98 | xptr_t lock_xp = XPTR( ctx_cxy , &ctx_ptr->lock ); |
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99 | |
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100 | // build extended pointer on inum bitmap |
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101 | xptr_t bitmap_xp = XPTR( ctx_cxy , &ctx_ptr->bitmap ); |
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102 | |
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103 | // get lock on inum allocator |
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104 | remote_busylock_acquire( lock_xp ); |
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105 | |
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106 | // get lid from local inum allocator |
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107 | uint32_t lid = bitmap_remote_ffc( bitmap_xp , CONFIG_VFS_MAX_INODES ); |
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108 | |
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109 | if( lid == 0xFFFFFFFF ) // no more free slot => error |
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110 | { |
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111 | // release lock |
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112 | remote_busylock_release( lock_xp ); |
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113 | |
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114 | // return error |
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115 | return -1; |
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116 | } |
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117 | else // found => return inum |
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118 | { |
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119 | // set slot allocated |
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120 | bitmap_remote_set( bitmap_xp , lid ); |
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121 | |
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122 | // release lock |
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123 | remote_busylock_release( lock_xp ); |
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124 | |
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125 | // return inum |
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126 | *inum = (((uint32_t)local_cxy) << 16) | (lid & 0xFFFF); |
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127 | return 0; |
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128 | } |
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129 | } // end vfs_ctx_inum_alloc() |
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130 | |
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131 | ///////////////////////////////////////////// |
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132 | void vfs_ctx_inum_release( xptr_t ctx_xp, |
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133 | uint32_t inum ) |
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134 | { |
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135 | // get context cluster and local pointer |
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136 | cxy_t ctx_cxy = GET_CXY( ctx_xp ); |
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137 | vfs_ctx_t * ctx_ptr = GET_PTR( ctx_xp ); |
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138 | |
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139 | // build extended pointer on inum bitmap |
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140 | xptr_t bitmap_xp = XPTR( ctx_cxy , &ctx_ptr->bitmap ); |
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141 | |
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142 | // build extended pointer on lock |
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143 | xptr_t lock_xp = XPTR( ctx_cxy , &ctx_ptr->lock ); |
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144 | |
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145 | // get lock |
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146 | remote_busylock_acquire( lock_xp ); |
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147 | |
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148 | bitmap_remote_clear( bitmap_xp , inum & 0xFFFF ); |
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149 | |
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150 | // release lock |
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151 | remote_busylock_release( lock_xp ); |
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152 | |
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153 | } // end vfs_ctx_inum_release() |
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154 | |
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155 | ////////////////////////////////////////////////////////////////////////////////////////// |
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156 | // VFS inode descriptor related functions |
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157 | ////////////////////////////////////////////////////////////////////////////////////////// |
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158 | |
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159 | const char * vfs_inode_type_str( vfs_file_type_t type ) |
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160 | { |
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161 | switch ( type ) |
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162 | { |
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163 | case FILE_TYPE_REG: return "FILE"; |
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164 | case FILE_TYPE_DIR: return "DIR "; |
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165 | case FILE_TYPE_FIFO: return "FIFO"; |
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166 | case FILE_TYPE_PIPE: return "PIPE"; |
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167 | case FILE_TYPE_SOCK: return "SOCK"; |
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168 | case FILE_TYPE_DEV: return "DEV "; |
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169 | case FILE_TYPE_BLK: return "BLK "; |
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170 | case FILE_TYPE_SYML: return "SYML"; |
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171 | default: return "undefined"; |
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172 | } |
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173 | } |
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174 | |
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175 | //////////////////////////////////////////////// |
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176 | error_t vfs_inode_create( cxy_t cxy, |
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177 | vfs_fs_type_t fs_type, |
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178 | uint32_t attr, |
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179 | uint32_t rights, |
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180 | uid_t uid, |
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181 | gid_t gid, |
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182 | xptr_t * inode_xp ) |
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183 | { |
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184 | xptr_t mapper_xp; // extended pointer on associated mapper |
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185 | mapper_t * mapper_ptr; // local pointer on associated mapper |
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186 | vfs_inode_t * inode_ptr; // local pointer on allocated inode |
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187 | uint32_t inum; // inode identifier (to be allocated) |
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188 | vfs_ctx_t * ctx; // file system context |
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189 | error_t error; |
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190 | |
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191 | #if DEBUG_VFS_INODE_CREATE || DEBUG_VFS_ERROR |
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192 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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193 | thread_t * this = CURRENT_THREAD; |
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194 | pid_t pid = this->process->pid; |
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195 | trdid_t trdid = this->trdid; |
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196 | #endif |
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197 | |
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198 | // check fs type and get pointer on context |
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199 | if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS]; |
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200 | else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS]; |
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201 | else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS]; |
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202 | else |
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203 | { |
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204 | |
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205 | #if DEBUG_VFS_ERROR |
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206 | printk("\n[ERROR] in %s : thread[%x,%x] / illegal FS type / cycle %d\n", |
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207 | __FUNCTION__ , pid , trdid, cycle ); |
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208 | #endif |
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209 | return -1; |
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210 | } |
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211 | |
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212 | // check inode descriptor contained in one page |
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213 | assert( __FUNCTION__, (sizeof(vfs_inode_t) <= CONFIG_PPM_PAGE_SIZE), |
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214 | "inode descriptor must fit in one page" ); |
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215 | |
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216 | // allocate inum |
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217 | error = vfs_ctx_inum_alloc( XPTR( cxy , ctx ) , &inum ); |
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218 | |
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219 | if( error ) |
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220 | { |
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221 | |
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222 | #if DEBUG_VFS_ERROR |
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223 | printk("\n[ERROR] in %s : thread[%x,%x] cannot allocate inum / cycle %d\n", |
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224 | __FUNCTION__ , pid , trdid, cycle ); |
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225 | #endif |
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226 | return -1; |
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227 | } |
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228 | |
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229 | // allocate memory for mapper in cluster cxy |
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230 | mapper_xp = mapper_create( cxy , fs_type ); |
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231 | |
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232 | if( mapper_xp == XPTR_NULL ) |
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233 | { |
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234 | |
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235 | #if DEBUG_VFS_ERROR |
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236 | printk("\n[ERROR] in %s : thread[%x,%x] cannot allocate mapper / cycle %d\n", |
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237 | __FUNCTION__ , pid , trdid, cycle ); |
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238 | #endif |
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239 | vfs_ctx_inum_release( XPTR( cxy , ctx ) , inum ); |
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240 | return -1; |
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241 | } |
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242 | |
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243 | mapper_ptr = GET_PTR( mapper_xp ); |
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244 | |
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245 | // allocate memory for inode descriptor |
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246 | inode_ptr = kmem_remote_alloc( cxy, |
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247 | bits_log2(sizeof(vfs_inode_t)), |
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248 | AF_ZERO ); |
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249 | if( inode_ptr == NULL ) |
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250 | { |
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251 | |
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252 | #if DEBUG_VFS_ERROR |
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253 | printk("\n[ERROR] in %s : thread[%x,%x] cannot allocate inode / cycle %d\n", |
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254 | __FUNCTION__ , pid , trdid, cycle ); |
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255 | #endif |
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256 | vfs_ctx_inum_release( XPTR( cxy , ctx ) , inum ); |
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257 | mapper_destroy( mapper_xp ); |
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258 | return -1; |
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259 | } |
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260 | |
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261 | // initialise inode field in mapper |
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262 | hal_remote_spt( XPTR( cxy , &mapper_ptr->inode ) , inode_ptr ); |
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263 | |
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264 | // initialize inode descriptor |
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265 | hal_remote_s32( XPTR( cxy , &inode_ptr->type ) , FILE_TYPE_REG ); // default value |
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266 | hal_remote_s32( XPTR( cxy , &inode_ptr->inum ) , inum ); |
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267 | hal_remote_s32( XPTR( cxy , &inode_ptr->attr ) , attr ); |
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268 | hal_remote_s32( XPTR( cxy , &inode_ptr->rights ) , rights ); |
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269 | hal_remote_s32( XPTR( cxy , &inode_ptr->links ) , 0 ); |
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270 | hal_remote_s32( XPTR( cxy , &inode_ptr->uid ) , uid ); |
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271 | hal_remote_s32( XPTR( cxy , &inode_ptr->gid ) , gid ); |
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272 | hal_remote_spt( XPTR( cxy , &inode_ptr->ctx ) , ctx ); |
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273 | hal_remote_spt( XPTR( cxy , &inode_ptr->mapper ) , mapper_ptr ); |
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274 | hal_remote_spt( XPTR( cxy , &inode_ptr->extend ) , NULL ); |
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275 | |
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276 | // initialize chidren dentries xhtab |
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277 | xhtab_init( XPTR( cxy , &inode_ptr->children ) , XHTAB_DENTRY_TYPE ); |
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278 | |
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279 | // initialize parents dentries xlist |
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280 | xlist_root_init( XPTR( cxy , &inode_ptr->parents ) ); |
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281 | |
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282 | // initialize lock protecting size |
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283 | remote_rwlock_init( XPTR( cxy , &inode_ptr->size_lock ), LOCK_VFS_SIZE ); |
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284 | |
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285 | // initialise lock protecting inode tree traversal |
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286 | remote_rwlock_init( XPTR( cxy , &inode_ptr->main_lock ), LOCK_VFS_MAIN ); |
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287 | |
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288 | // return extended pointer on inode |
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289 | *inode_xp = XPTR( cxy , inode_ptr ); |
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290 | |
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291 | #if DEBUG_VFS_INODE_CREATE |
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292 | if( DEBUG_VFS_INODE_CREATE < cycle ) |
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293 | printk("\n[%s] thread[%x,%x] created inode (%x,%x) / ctx %x / fs_type %d / cycle %d\n", |
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294 | __FUNCTION__, pid, trdid, cxy, inode_ptr, ctx, ctx->type, cycle ); |
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295 | #endif |
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296 | |
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297 | return 0; |
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298 | |
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299 | } // end vfs_inode_create() |
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300 | |
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301 | ////////////////////////////////////////// |
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302 | void vfs_inode_destroy( xptr_t inode_xp ) |
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303 | { |
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304 | // get cluster and local pointer |
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305 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
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306 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
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307 | |
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308 | // get local pointer on mapper |
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309 | mapper_t * mapper_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper )); |
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310 | |
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311 | // release memory allocated for mapper |
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312 | mapper_destroy( XPTR( inode_cxy , mapper_ptr ) ); |
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313 | |
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314 | // release memory allocated for inode descriptor |
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315 | kmem_remote_free( inode_cxy, |
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316 | inode_ptr, |
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317 | bits_log2(sizeof(vfs_inode_t)) ); |
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318 | |
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319 | } // end vfs_inode_destroy() |
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320 | |
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321 | ////////////////////////////////////////////// |
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322 | uint32_t vfs_inode_get_size( xptr_t inode_xp ) |
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323 | { |
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324 | // get inode cluster and local pointer |
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325 | cxy_t cxy = GET_CXY( inode_xp ); |
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326 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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327 | |
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328 | // build extended pointers on lock & size |
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329 | xptr_t lock_xp = XPTR( cxy , &ptr->size_lock ); |
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330 | xptr_t size_xp = XPTR( cxy , &ptr->size ); |
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331 | |
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332 | // take lock in read mode |
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333 | remote_rwlock_rd_acquire( lock_xp ); |
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334 | |
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335 | // get size |
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336 | uint32_t size = hal_remote_l32( size_xp ); |
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337 | |
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338 | // release lock from read mode |
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339 | remote_rwlock_rd_release( lock_xp ); |
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340 | |
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341 | return size; |
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342 | } |
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343 | |
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344 | /////////////////////////////////////////////// |
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345 | void vfs_inode_update_size( xptr_t inode_xp, |
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346 | uint32_t size ) |
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347 | { |
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348 | // get inode cluster and local pointer |
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349 | cxy_t cxy = GET_CXY( inode_xp ); |
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350 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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351 | |
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352 | // build extended pointers on lock & size |
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353 | xptr_t lock_xp = XPTR( cxy , &ptr->size_lock ); |
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354 | xptr_t size_xp = XPTR( cxy , &ptr->size ); |
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355 | |
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356 | // take lock in write mode |
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357 | remote_rwlock_wr_acquire( lock_xp ); |
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358 | |
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359 | // get current size |
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360 | uint32_t current_size = hal_remote_l32( size_xp ); |
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361 | |
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362 | // set size if required |
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363 | if( current_size < size ) hal_remote_s32( size_xp , size ); |
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364 | |
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365 | // release lock from write mode |
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366 | remote_rwlock_wr_release( lock_xp ); |
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367 | } |
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368 | |
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369 | //////////////////////////////////////// |
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370 | void vfs_inode_unlock( xptr_t inode_xp ) |
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371 | { |
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372 | // get inode cluster and local pointer |
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373 | cxy_t cxy = GET_CXY( inode_xp ); |
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374 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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375 | |
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376 | // release the main lock |
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377 | remote_busylock_release( XPTR( cxy , &ptr->main_lock ) ); |
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378 | } |
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379 | |
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380 | ////////////////////////////////////// |
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381 | void vfs_inode_lock( xptr_t inode_xp ) |
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382 | { |
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383 | // get inode cluster and local pointer |
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384 | cxy_t cxy = GET_CXY( inode_xp ); |
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385 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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386 | |
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387 | // get the main lock |
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388 | remote_busylock_acquire( XPTR( cxy , &ptr->main_lock ) ); |
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389 | } |
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390 | |
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391 | /////////////////////////////////////////// |
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392 | void vfs_inode_get_name( xptr_t inode_xp, |
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393 | char * name ) |
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394 | { |
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395 | cxy_t inode_cxy; // inode cluster identifier |
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396 | vfs_inode_t * inode_ptr; // local pointer on inode |
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397 | xptr_t parents_root_xp; // extended pointer on inode parents root |
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398 | |
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399 | // get inode cluster and local pointer |
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400 | inode_ptr = GET_PTR( inode_xp ); |
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401 | inode_cxy = GET_CXY( inode_xp ); |
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402 | |
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403 | // build extended pointer on parents dentries root |
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404 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
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405 | |
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406 | // check VFS root |
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407 | if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root |
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408 | { |
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409 | strcpy( name , "/" ); |
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410 | } |
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411 | else // not the VFS root |
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412 | { |
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413 | xptr_t dentry_xp; |
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414 | cxy_t dentry_cxy; |
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415 | vfs_dentry_t * dentry_ptr; |
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416 | |
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417 | // get first name in list of parents |
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418 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
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419 | dentry_cxy = GET_CXY( dentry_xp ); |
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420 | dentry_ptr = GET_PTR( dentry_xp ); |
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421 | |
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422 | hal_remote_strcpy( XPTR( local_cxy , name ) , |
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423 | XPTR( dentry_cxy , dentry_ptr->name ) ); |
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424 | } |
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425 | |
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426 | } // end vfs_inode_get_name() |
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427 | |
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428 | //////////////////////////////////////////////////// |
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429 | error_t vfs_inode_load_all_pages( xptr_t inode_xp ) |
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430 | { |
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431 | uint32_t page_id; |
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432 | xptr_t page_xp; |
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433 | |
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434 | |
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435 | // get inode cluster and local pointer |
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436 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
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437 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
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438 | |
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439 | // get pointer on mapper and size |
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440 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
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441 | uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
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442 | |
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443 | #if DEBUG_VFS_INODE_LOAD_ALL || DEBUG_VFS_ERROR |
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444 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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445 | thread_t * this = CURRENT_THREAD; |
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446 | #endif |
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447 | |
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448 | #if DEBUG_VFS_INODE_LOAD_ALL |
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449 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
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450 | vfs_inode_get_name( inode_xp , name ); |
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451 | if( DEBUG_VFS_INODE_LOAD_ALL < cycle ) |
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452 | printk("\n[%s] thread[%x,%x] enter for <%s> in cluster %x / cycle %d\n", |
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453 | __FUNCTION__, this->process->pid, this->trdid, name, inode_cxy, cycle ); |
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454 | #endif |
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455 | |
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456 | // compute number of pages |
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457 | uint32_t npages = size >> CONFIG_PPM_PAGE_ORDER; |
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458 | if( (size & CONFIG_PPM_PAGE_MASK) || (size == 0) ) npages++; |
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459 | |
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460 | // loop on pages |
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461 | for( page_id = 0 ; page_id < npages ; page_id ++ ) |
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462 | { |
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463 | // If the mage is missing, this function allocates the missing page, |
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464 | // and load the page from IOC device into mapper |
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465 | page_xp = mapper_get_page( XPTR( inode_cxy , mapper ), page_id ); |
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466 | |
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467 | if( page_xp == XPTR_NULL ) |
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468 | { |
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469 | |
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470 | #if DEBUG_VFS_ERROR |
---|
471 | printk("\n[ERROR] in %s : thread[%x,%x] cannot allocate memory for mapper / cycle %d\n", |
---|
472 | __FUNCTION__, this->process->pid, this->trdid, cycle ); |
---|
473 | #endif |
---|
474 | return -1; |
---|
475 | } |
---|
476 | } |
---|
477 | |
---|
478 | #if DEBUG_VFS_INODE_LOAD_ALL |
---|
479 | cycle = (uint32_t)hal_get_cycles(); |
---|
480 | if( DEBUG_VFS_INODE_LOAD_ALL < cycle ) |
---|
481 | printk("\n[%s] thread[%x,%x] exit for <%s> in cluster %x\n", |
---|
482 | __FUNCTION__, this->process->pid, this->trdid, name, inode_cxy ); |
---|
483 | #endif |
---|
484 | |
---|
485 | return 0; |
---|
486 | |
---|
487 | } // end vfs_inode_load_all_pages() |
---|
488 | |
---|
489 | ///////////////////////////////////////// |
---|
490 | void vfs_inode_display( xptr_t inode_xp ) |
---|
491 | { |
---|
492 | assert( __FUNCTION__, (inode_xp != XPTR_NULL), "inode pointer is NULL"); |
---|
493 | |
---|
494 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
495 | |
---|
496 | vfs_inode_get_name( inode_xp , name ); |
---|
497 | |
---|
498 | // get inode cluster and local pointer |
---|
499 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
500 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
501 | |
---|
502 | vfs_file_type_t type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
503 | uint32_t attr = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->attr ) ); |
---|
504 | uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
505 | uint32_t parents = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->links ) ); |
---|
506 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
507 | void * extend = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->extend ) ); |
---|
508 | |
---|
509 | printk("\n**** inode <%s>\n" |
---|
510 | " - type = %s\n" |
---|
511 | " - attr = %x\n" |
---|
512 | " - size = %d\n" |
---|
513 | " - parents = %d\n" |
---|
514 | " - cxy = %x\n" |
---|
515 | " - inode = %x\n" |
---|
516 | " - mapper = %x\n" |
---|
517 | " - extend = %x\n", |
---|
518 | name, |
---|
519 | vfs_inode_type_str( type ), |
---|
520 | attr, |
---|
521 | size, |
---|
522 | parents, |
---|
523 | inode_cxy, |
---|
524 | inode_ptr, |
---|
525 | mapper, |
---|
526 | extend ); |
---|
527 | |
---|
528 | } // end vfs_inode_display() |
---|
529 | |
---|
530 | |
---|
531 | //////////////////////////////////////////////////////////////////////////////////////////// |
---|
532 | // VFS dentry descriptor related functions |
---|
533 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
534 | |
---|
535 | /////////////////////////////////////////////// |
---|
536 | error_t vfs_dentry_create( cxy_t cxy, |
---|
537 | vfs_fs_type_t fs_type, |
---|
538 | char * name, |
---|
539 | xptr_t * dentry_xp ) |
---|
540 | { |
---|
541 | vfs_ctx_t * ctx = NULL; // context descriptor |
---|
542 | vfs_dentry_t * dentry_ptr; // dentry descriptor (to be allocated) |
---|
543 | |
---|
544 | #if DEBUG_VFS_DENTRY_CREATE || DEBUG_VFS_ERROR |
---|
545 | thread_t * this = CURRENT_THREAD; |
---|
546 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
547 | #endif |
---|
548 | |
---|
549 | #if DEBUG_VFS_DENTRY_CREATE |
---|
550 | if( DEBUG_VFS_DENTRY_CREATE < cycle ) |
---|
551 | printk("\n[%s] thread[%x,%x] enters for <%s> / fs_type %x / cycle %d\n", |
---|
552 | __FUNCTION__, this->process->pid, this->trdid, name, fs_type, cycle ); |
---|
553 | #endif |
---|
554 | |
---|
555 | // get pointer on context |
---|
556 | if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS]; |
---|
557 | else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS]; |
---|
558 | else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS]; |
---|
559 | else |
---|
560 | { |
---|
561 | |
---|
562 | #if DEBUG_VFS_ERROR |
---|
563 | printk("\n[ERROR] in %s : thread[%x,%x] / undefined fs_type %d / cycle %d\n", |
---|
564 | __FUNCTION__ , this->process->pid, this->trdid, fs_type, cycle ); |
---|
565 | #endif |
---|
566 | return -1; |
---|
567 | } |
---|
568 | |
---|
569 | // get name length |
---|
570 | uint32_t length = strlen( name ); |
---|
571 | |
---|
572 | if( length >= CONFIG_VFS_MAX_NAME_LENGTH ) return -1; |
---|
573 | |
---|
574 | // allocate memory for dentry descriptor |
---|
575 | dentry_ptr = kmem_remote_alloc( cxy, |
---|
576 | bits_log2(sizeof(vfs_dentry_t)), |
---|
577 | AF_ZERO ); |
---|
578 | if( dentry_ptr == NULL ) |
---|
579 | { |
---|
580 | |
---|
581 | #if DEBUG_VFS_ERROR |
---|
582 | printk("\n[ERROR] in %s : thread[%x,%x] cannot allocate dentry descriptor / cycle %d\n", |
---|
583 | __FUNCTION__ , this->process->pid, this->trdid, cycle ); |
---|
584 | #endif |
---|
585 | return -1; |
---|
586 | } |
---|
587 | |
---|
588 | // initialize dentry descriptor |
---|
589 | hal_remote_spt( XPTR( cxy , &dentry_ptr->ctx ) , ctx ); |
---|
590 | hal_remote_s32( XPTR( cxy , &dentry_ptr->length ) , length ); |
---|
591 | hal_remote_spt( XPTR( cxy , &dentry_ptr->extend ) , NULL ); |
---|
592 | |
---|
593 | // register name |
---|
594 | hal_remote_strcpy( XPTR( cxy, dentry_ptr->name ), |
---|
595 | XPTR( local_cxy, name ) ); |
---|
596 | |
---|
597 | // return extended pointer on dentry |
---|
598 | *dentry_xp = XPTR( cxy , dentry_ptr ); |
---|
599 | |
---|
600 | #if DEBUG_VFS_DENTRY_CREATE |
---|
601 | if( DEBUG_VFS_DENTRY_CREATE < cycle ) |
---|
602 | printk("\n[%s] thread[%x,%x] exit for <%s> / dentry (%x,%x)\n", |
---|
603 | __FUNCTION__, this->process->pid, this->trdid, name, cxy, dentry_ptr ); |
---|
604 | #endif |
---|
605 | |
---|
606 | return 0; |
---|
607 | |
---|
608 | } // end vfs_dentry_create() |
---|
609 | |
---|
610 | //////////////////////////////////////////// |
---|
611 | void vfs_dentry_destroy( xptr_t dentry_xp ) |
---|
612 | { |
---|
613 | // get cluster and local pointer |
---|
614 | vfs_dentry_t * dentry_ptr = GET_PTR( dentry_xp ); |
---|
615 | cxy_t dentry_cxy = GET_CXY( dentry_xp ); |
---|
616 | |
---|
617 | // release memory allocated to dentry |
---|
618 | kmem_remote_free( dentry_cxy, |
---|
619 | dentry_ptr, |
---|
620 | bits_log2(sizeof(vfs_dentry_t)) ); |
---|
621 | |
---|
622 | } // end vfs_dentry_destroy() |
---|
623 | |
---|
624 | |
---|
625 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
626 | // VFS file descriptor related functions |
---|
627 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
628 | |
---|
629 | ///////////////////////////////////////////// |
---|
630 | error_t vfs_file_create( xptr_t inode_xp, |
---|
631 | uint32_t attr, |
---|
632 | xptr_t * file_xp ) |
---|
633 | { |
---|
634 | vfs_file_t * file_ptr; |
---|
635 | uint32_t type; |
---|
636 | mapper_t * mapper; |
---|
637 | pipe_t * pipe; |
---|
638 | vfs_ctx_t * ctx; |
---|
639 | |
---|
640 | // get inode cluster and local pointer |
---|
641 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
642 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
643 | |
---|
644 | #if DEBUG_VFS_FILE_CREATE || DEBUG_VFS_ERROR |
---|
645 | thread_t * this = CURRENT_THREAD; |
---|
646 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
647 | #endif |
---|
648 | |
---|
649 | #if DEBUG_VFS_FILE_CREATE |
---|
650 | if( DEBUG_VFS_FILE_CREATE < cycle ) |
---|
651 | printk("\n[%s] thread[%x,%x] enter for inode (%x,%x) / cycle %d\n", |
---|
652 | __FUNCTION__, this->process->pid, this->trdid, inode_cxy, inode_ptr, cycle ); |
---|
653 | #endif |
---|
654 | |
---|
655 | // allocate memory for new file descriptor |
---|
656 | file_ptr = kmem_remote_alloc( inode_cxy, |
---|
657 | bits_log2(sizeof(vfs_file_t)), |
---|
658 | AF_ZERO ); |
---|
659 | |
---|
660 | if( file_ptr == NULL ) |
---|
661 | { |
---|
662 | |
---|
663 | #if DEBUG_VFS_ERROR |
---|
664 | printk("\n[ERROR] in %s : thread[%x,%x] / cannot allocate memory / cycle %d\n", |
---|
665 | __FUNCTION__ , this->process->pid, this->trdid, cycle ); |
---|
666 | #endif |
---|
667 | return -1; |
---|
668 | } |
---|
669 | |
---|
670 | // get type, ctx, mapper, and buffer from inode descriptor |
---|
671 | type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
672 | ctx = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->ctx ) ); |
---|
673 | mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
674 | pipe = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->pipe ) ); |
---|
675 | |
---|
676 | // initializes new file descriptor |
---|
677 | hal_remote_s32( XPTR( inode_cxy , &file_ptr->type ) , type ); |
---|
678 | hal_remote_s32( XPTR( inode_cxy , &file_ptr->attr ) , attr ); |
---|
679 | hal_remote_spt( XPTR( inode_cxy , &file_ptr->ctx ) , ctx ); |
---|
680 | hal_remote_s32( XPTR( inode_cxy , &file_ptr->offset ) , 0 ); |
---|
681 | hal_remote_spt( XPTR( inode_cxy , &file_ptr->inode ) , inode_ptr ); |
---|
682 | hal_remote_spt( XPTR( inode_cxy , &file_ptr->mapper ) , mapper ); |
---|
683 | hal_remote_spt( XPTR( inode_cxy , &file_ptr->pipe ) , pipe ); |
---|
684 | |
---|
685 | remote_rwlock_init( XPTR( inode_cxy , &file_ptr->lock ), LOCK_VFS_FILE ); |
---|
686 | |
---|
687 | *file_xp = XPTR( inode_cxy , file_ptr ); |
---|
688 | |
---|
689 | #if DEBUG_VFS_FILE_CREATE |
---|
690 | if( (DEBUG_VFS_FILE_CREATE < cycle) && (type == FILE_TYPE_REG)) |
---|
691 | { |
---|
692 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
693 | vfs_file_get_name( XPTR( inode_cxy , file_ptr ) , name ); |
---|
694 | printk("\n[%s] thread[%x,%x] created file (%x,%x) / %s (%s)\n", |
---|
695 | __FUNCTION__, this->process->pid, this->trdid, |
---|
696 | inode_cxy, file_ptr, vfs_inode_type_str(type), name ); |
---|
697 | } |
---|
698 | if( (DEBUG_VFS_FILE_CREATE < cycle) && (type != FILE_TYPE_REG)) |
---|
699 | { |
---|
700 | printk("\n[%s] thread[%x,%x] created file (%x,%x) / %s\n", |
---|
701 | __FUNCTION__, this->process->pid, this->trdid, |
---|
702 | inode_cxy, file_ptr, vfs_inode_type_str(type) ); |
---|
703 | } |
---|
704 | #endif |
---|
705 | |
---|
706 | return 0; |
---|
707 | |
---|
708 | } // end vfs_file_create() |
---|
709 | |
---|
710 | //////////////////////////////////////// |
---|
711 | void vfs_file_destroy( xptr_t file_xp ) |
---|
712 | { |
---|
713 | // get file cluster and local pointer |
---|
714 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
715 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
716 | |
---|
717 | #if DEBUG_VFS_FILE_DESTROY |
---|
718 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
719 | vfs_file_get_name( file_xp , name ); |
---|
720 | thread_t * this = CURRENT_THREAD; |
---|
721 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
722 | if( DEBUG_VFS_FILE_DESTROY < cycle ) |
---|
723 | printk("\n[%s] thread[%x,%x] enter / file_ptr %x / file_cxy %x / <%s> / cycle %d\n", |
---|
724 | __FUNCTION__, this->process->pid, this->trdid, file_ptr, file_cxy, name, cycle ); |
---|
725 | #endif |
---|
726 | |
---|
727 | // release file descriptor |
---|
728 | kmem_remote_free( file_cxy, |
---|
729 | file_ptr, |
---|
730 | bits_log2(sizeof(vfs_file_t)) ); |
---|
731 | |
---|
732 | #if DEBUG_VFS_FILE_DESTROY |
---|
733 | cycle = (uint32_t)hal_get_cycles(); |
---|
734 | if( DEBUG_VFS_FILE_DESTROY < cycle ) |
---|
735 | printk("\n[%s] thread[%x,%x] exit for <%s> / cycle %d\n", |
---|
736 | __FUNCTION__, this->process->pid, this->trdid, file_ptr, file_cxy, name, cycle ); |
---|
737 | #endif |
---|
738 | |
---|
739 | } // end vfs_file_destroy() |
---|
740 | |
---|
741 | /////////////////////////////////////// |
---|
742 | void vfs_file_get_name( xptr_t file_xp, |
---|
743 | char * name ) |
---|
744 | { |
---|
745 | // get cluster and local pointer on remote file |
---|
746 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
747 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
748 | |
---|
749 | // get pointers on remote inode |
---|
750 | vfs_inode_t * inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
751 | xptr_t inode_xp = XPTR( file_cxy , inode_ptr ); |
---|
752 | |
---|
753 | // call the relevant function |
---|
754 | vfs_inode_get_name( inode_xp , name ); |
---|
755 | } |
---|
756 | |
---|
757 | |
---|
758 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
759 | // "syscalls" API related functions |
---|
760 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
761 | |
---|
762 | ////////////////////////////////////// |
---|
763 | error_t vfs_open( xptr_t root_xp, |
---|
764 | char * path, |
---|
765 | xptr_t process_xp, |
---|
766 | uint32_t flags, |
---|
767 | uint32_t mode, |
---|
768 | xptr_t * new_file_xp, |
---|
769 | uint32_t * new_file_id ) |
---|
770 | { |
---|
771 | error_t error; |
---|
772 | xptr_t inode_xp; // extended pointer on target inode |
---|
773 | cxy_t inode_cxy; // inode cluster identifier |
---|
774 | vfs_inode_t * inode_ptr; // inode local pointer |
---|
775 | uint32_t file_attr; // file descriptor attributes |
---|
776 | uint32_t lookup_mode; // lookup working mode |
---|
777 | xptr_t file_xp; // extended pointer on created file descriptor |
---|
778 | uint32_t file_id; // created file descriptor index in reference fd_array |
---|
779 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
780 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
781 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
782 | xptr_t lock_xp; // extended pointer on Inode Tree lock |
---|
783 | |
---|
784 | #if DEBUG_VFS_OPEN || DEBUG_VFS_ERROR |
---|
785 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
786 | thread_t * this = CURRENT_THREAD; |
---|
787 | pid_t pid = this->process->pid; |
---|
788 | trdid_t trdid = this->trdid; |
---|
789 | #endif |
---|
790 | |
---|
791 | if( mode != 0 ) |
---|
792 | { |
---|
793 | |
---|
794 | #if DEBUG_VFS_ERROR |
---|
795 | printk("\n[ERROR] in %s : the mode parameter is not supported yet\n" ); |
---|
796 | #endif |
---|
797 | return -1; |
---|
798 | } |
---|
799 | |
---|
800 | // compute lookup working mode |
---|
801 | lookup_mode = VFS_LOOKUP_OPEN; |
---|
802 | if( (flags & O_DIR ) ) lookup_mode |= VFS_LOOKUP_DIR; |
---|
803 | if( (flags & O_CREAT ) ) lookup_mode |= VFS_LOOKUP_CREATE; |
---|
804 | if( (flags & O_EXCL ) ) lookup_mode |= VFS_LOOKUP_EXCL; |
---|
805 | |
---|
806 | #if DEBUG_VFS_OPEN |
---|
807 | if( DEBUG_VFS_OPEN < cycle ) |
---|
808 | printk("\n[%s] thread[%x,%x] enter for <%s> / root_inode (%x,%x) / cycle %d\n", |
---|
809 | __FUNCTION__, pid, trdid, path, GET_CXY(root_xp), GET_PTR(root_xp), cycle ); |
---|
810 | #endif |
---|
811 | |
---|
812 | // compute attributes for the created file |
---|
813 | file_attr = 0; |
---|
814 | if( (flags & O_RDONLY ) == 0 ) file_attr |= FD_ATTR_WRITE_ENABLE; |
---|
815 | if( (flags & O_WRONLY ) == 0 ) file_attr |= FD_ATTR_READ_ENABLE; |
---|
816 | if( (flags & O_SYNC ) ) file_attr |= FD_ATTR_SYNC; |
---|
817 | if( (flags & O_APPEND ) ) file_attr |= FD_ATTR_APPEND; |
---|
818 | if( (flags & O_CLOEXEC) ) file_attr |= FD_ATTR_CLOSE_EXEC; |
---|
819 | |
---|
820 | // build extended pointer on lock protecting Inode Tree |
---|
821 | vfs_root_xp = process_zero.vfs_root_xp; |
---|
822 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
823 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
824 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
825 | |
---|
826 | // take lock protecting Inode Tree in read mode |
---|
827 | remote_rwlock_rd_acquire( lock_xp ); |
---|
828 | |
---|
829 | // get extended pointer on target inode |
---|
830 | error = vfs_lookup( root_xp, |
---|
831 | path, |
---|
832 | lookup_mode, |
---|
833 | &inode_xp, |
---|
834 | NULL ); |
---|
835 | |
---|
836 | // release lock protecting Inode Tree |
---|
837 | remote_rwlock_rd_release( lock_xp ); |
---|
838 | |
---|
839 | if( error ) |
---|
840 | { |
---|
841 | |
---|
842 | #if DEBUG_VFS_ERROR |
---|
843 | printk("\n[ERROR] in %s : thread[%x,%x] cannot get inode <%s> / cycle %d\n", |
---|
844 | __FUNCTION__ , pid, trdid , path , cycle ); |
---|
845 | #endif |
---|
846 | return -1; |
---|
847 | } |
---|
848 | |
---|
849 | // get target inode cluster and local pointer |
---|
850 | inode_cxy = GET_CXY( inode_xp ); |
---|
851 | inode_ptr = GET_PTR( inode_xp ); |
---|
852 | |
---|
853 | #if (DEBUG_VFS_OPEN & 1) |
---|
854 | if( DEBUG_VFS_OPEN < cycle ) |
---|
855 | printk("\n[%s] thread[%x,%x] found inode(%x,%x) for <%s>\n", |
---|
856 | __FUNCTION__, pid, trdid, inode_cxy, inode_ptr, path ); |
---|
857 | #endif |
---|
858 | |
---|
859 | // create a new file descriptor in cluster containing inode |
---|
860 | error = vfs_file_create( inode_xp , file_attr , &file_xp ); |
---|
861 | |
---|
862 | if( error ) |
---|
863 | { |
---|
864 | |
---|
865 | #if DEBUG_VFS_ERROR |
---|
866 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create file descriptor for <%s> / cycle %d\n", |
---|
867 | __FUNCTION__ , pid, trdid , path , cycle ); |
---|
868 | #endif |
---|
869 | return error; |
---|
870 | } |
---|
871 | |
---|
872 | #if (DEBUG_VFS_OPEN & 1) |
---|
873 | if( DEBUG_VFS_OPEN < cycle ) |
---|
874 | printk("\n[%s] thread[%x,%x] created file descriptor (%x,%x) for <%s>\n", |
---|
875 | __FUNCTION__, pid, trdid, GET_CXY(file_xp), GET_PTR(file_xp), path ); |
---|
876 | #endif |
---|
877 | |
---|
878 | // allocate and register a new file descriptor index in reference process |
---|
879 | error = process_fd_register( process_xp , file_xp , &file_id ); |
---|
880 | |
---|
881 | if( error ) |
---|
882 | { |
---|
883 | |
---|
884 | #if DEBUG_VFS_ERROR |
---|
885 | printk("\n[ERROR] in %s : thread[%x,%x] cannot register file descriptor for <%s> / cycle %d\n", |
---|
886 | __FUNCTION__ , pid, trdid , path , cycle ); |
---|
887 | #endif |
---|
888 | return error; |
---|
889 | } |
---|
890 | |
---|
891 | // get new file descriptor cluster and local pointer |
---|
892 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
893 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
894 | |
---|
895 | //get file type |
---|
896 | uint32_t file_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type )); |
---|
897 | |
---|
898 | // link the client thead to the pipe for a FIFO type |
---|
899 | if( file_type == FILE_TYPE_FIFO ) |
---|
900 | { |
---|
901 | // get local pointer on attached pipe |
---|
902 | pipe_t * pipe = hal_remote_lpt( XPTR( file_cxy , &file_ptr->pipe )); |
---|
903 | |
---|
904 | // build extended pointer on client thread |
---|
905 | xptr_t thread_xp = XPTR( local_cxy , this ); |
---|
906 | |
---|
907 | // update pipe descriptor |
---|
908 | if( flags & O_RDONLY ) hal_remote_s64( XPTR(file_cxy,&pipe->reader_xp) , thread_xp ); |
---|
909 | if( flags & O_WRONLY ) hal_remote_s64( XPTR(file_cxy,&pipe->writer_xp) , thread_xp ); |
---|
910 | } |
---|
911 | |
---|
912 | #if DEBUG_VFS_OPEN |
---|
913 | cycle = (uint32_t)hal_get_cycles(); |
---|
914 | if( DEBUG_VFS_OPEN < cycle ) |
---|
915 | printk("\n[%s] thread[%x,%x] exit for <%s> / fdid %d / file(%x,%x) / cycle %d\n", |
---|
916 | __FUNCTION__, pid, trdid, path, file_id, |
---|
917 | GET_CXY( file_xp ), GET_PTR( file_xp ), cycle ); |
---|
918 | #endif |
---|
919 | |
---|
920 | // success |
---|
921 | *new_file_xp = file_xp; |
---|
922 | *new_file_id = file_id; |
---|
923 | return 0; |
---|
924 | |
---|
925 | } // end vfs_open() |
---|
926 | |
---|
927 | /////////////////////////////////////////// |
---|
928 | uint32_t vfs_user_move( bool_t to_buffer, |
---|
929 | xptr_t file_xp, |
---|
930 | void * buffer, |
---|
931 | uint32_t count ) |
---|
932 | { |
---|
933 | cxy_t file_cxy; // remote file descriptor cluster |
---|
934 | vfs_file_t * file_ptr; // remote file descriptor local pointer |
---|
935 | mapper_t * mapper; // local pointer on file mapper |
---|
936 | vfs_inode_t * inode; // local pointer on file inode |
---|
937 | vfs_file_type_t type; // inode type |
---|
938 | uint32_t offset; // current offset in file |
---|
939 | uint32_t size; // current file size |
---|
940 | uint32_t nbytes; // number of bytes actually transfered |
---|
941 | error_t error; |
---|
942 | |
---|
943 | // check argument |
---|
944 | assert( __FUNCTION__, (file_xp != XPTR_NULL), "file_xp == XPTR_NULL" ); |
---|
945 | |
---|
946 | // get cluster and local pointer on remote file descriptor |
---|
947 | file_cxy = GET_CXY( file_xp ); |
---|
948 | file_ptr = GET_PTR( file_xp ); |
---|
949 | |
---|
950 | // get various infos from remote file descriptor |
---|
951 | type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) ); |
---|
952 | offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) ); |
---|
953 | mapper = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
954 | inode = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
955 | size = hal_remote_l32( XPTR( file_cxy , &inode->size ) ); |
---|
956 | |
---|
957 | // check inode type |
---|
958 | assert( __FUNCTION__, (type == FILE_TYPE_REG), "bad inode type" ); |
---|
959 | |
---|
960 | #if DEBUG_VFS_USER_MOVE || DEBUG_VFS_ERROR |
---|
961 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
962 | thread_t * this = CURRENT_THREAD; |
---|
963 | #endif |
---|
964 | |
---|
965 | #if DEBUG_VFS_USER_MOVE |
---|
966 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
967 | vfs_inode_get_name( XPTR( file_cxy , inode ) , name ); |
---|
968 | if( cycle > DEBUG_VFS_USER_MOVE ) |
---|
969 | { |
---|
970 | if( to_buffer ) |
---|
971 | printk("\n[%s] thread[%x,%x] enter / %d bytes / map(%s) -> buf(%x) / offset %d / cycle %d\n", |
---|
972 | __FUNCTION__ , this->process->pid, this->trdid, count, name, buffer, offset, cycle ); |
---|
973 | else |
---|
974 | printk("\n[%s] thread[%x,%x] enter / %d bytes / buf(%x) -> map(%s) / offset %d / cycle %d\n", |
---|
975 | __FUNCTION__ , this->process->pid, this->trdid, count, buffer, name, offset, cycle ); |
---|
976 | } |
---|
977 | #endif |
---|
978 | |
---|
979 | if( to_buffer ) // => compute the number of bytes to move and make the move |
---|
980 | { |
---|
981 | // compute number of bytes to move |
---|
982 | if ( size <= offset ) nbytes = 0; |
---|
983 | else if( size < offset + count ) nbytes = size - offset; |
---|
984 | else nbytes = count; |
---|
985 | |
---|
986 | // move data from mapper to buffer when required |
---|
987 | if( nbytes > 0 ) |
---|
988 | { |
---|
989 | error = mapper_move_user( XPTR( file_cxy , mapper ), |
---|
990 | to_buffer, |
---|
991 | offset, |
---|
992 | buffer, |
---|
993 | nbytes ); |
---|
994 | } |
---|
995 | else |
---|
996 | { |
---|
997 | error = 0; |
---|
998 | } |
---|
999 | } |
---|
1000 | else // to mapper => make the move and update the file size if required |
---|
1001 | { |
---|
1002 | nbytes = count; |
---|
1003 | |
---|
1004 | // move data from buffer to mapper |
---|
1005 | error = mapper_move_user( XPTR( file_cxy , mapper ), |
---|
1006 | to_buffer, |
---|
1007 | offset, |
---|
1008 | buffer, |
---|
1009 | count ); |
---|
1010 | |
---|
1011 | // update file size in inode if required |
---|
1012 | if( offset + count > size ) |
---|
1013 | { |
---|
1014 | vfs_inode_update_size( XPTR( file_cxy , inode ) , offset + count ); |
---|
1015 | } |
---|
1016 | } |
---|
1017 | |
---|
1018 | if( error ) |
---|
1019 | { |
---|
1020 | |
---|
1021 | #if DEBUG_VFS_ERROR |
---|
1022 | printk("\n[ERROR] in %s thread[%x,%x] cannot move data / cycle %d", |
---|
1023 | __FUNCTION__, this->process->pid, this->trdid, cycle ); |
---|
1024 | #endif |
---|
1025 | return -1; |
---|
1026 | } |
---|
1027 | |
---|
1028 | // update file offset in file descriptor |
---|
1029 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->offset ) , nbytes ); |
---|
1030 | |
---|
1031 | #if DEBUG_VFS_USER_MOVE |
---|
1032 | if( cycle > DEBUG_VFS_USER_MOVE ) |
---|
1033 | { |
---|
1034 | if( to_buffer ) |
---|
1035 | printk("\n[%s] thread[%x,%x] exit / %d bytes moved from mapper to buffer\n", |
---|
1036 | __FUNCTION__ , this->process->pid, nbytes ); |
---|
1037 | else |
---|
1038 | printk("\n[%s] thread[%x,%x] exit / %d bytes moved from buffer to mapper\n", |
---|
1039 | __FUNCTION__ , this->process->pid, nbytes ); |
---|
1040 | } |
---|
1041 | #endif |
---|
1042 | |
---|
1043 | return nbytes; |
---|
1044 | |
---|
1045 | } // end vfs_user_move() |
---|
1046 | |
---|
1047 | //////////////////////////////////////////// |
---|
1048 | error_t vfs_kernel_move( bool_t to_buffer, |
---|
1049 | xptr_t file_xp, |
---|
1050 | xptr_t buffer_xp, |
---|
1051 | uint32_t size ) |
---|
1052 | { |
---|
1053 | cxy_t file_cxy; // remote file descriptor cluster |
---|
1054 | vfs_file_t * file_ptr; // remote file descriptor local pointer |
---|
1055 | uint32_t file_offset; // current offset in file |
---|
1056 | mapper_t * mapper_ptr; // remote mapper local pointer |
---|
1057 | xptr_t mapper_xp; // remote mapper extended pointer |
---|
1058 | error_t error; |
---|
1059 | |
---|
1060 | // check argument |
---|
1061 | assert( __FUNCTION__, (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL" ); |
---|
1062 | |
---|
1063 | #if DEBUG_VFS_KERNEL_MOVE || DEBUG_VFS_ERROR |
---|
1064 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1065 | thread_t * this = CURRENT_THREAD; |
---|
1066 | #endif |
---|
1067 | |
---|
1068 | // get cluster and local pointer on remote file descriptor |
---|
1069 | file_cxy = GET_CXY( file_xp ); |
---|
1070 | file_ptr = GET_PTR( file_xp ); |
---|
1071 | |
---|
1072 | // get mapper pointers and file offset from file descriptor |
---|
1073 | file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) ); |
---|
1074 | mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
1075 | mapper_xp = XPTR( file_cxy , mapper_ptr ); |
---|
1076 | |
---|
1077 | // move data between mapper and buffer |
---|
1078 | error = mapper_move_kernel( mapper_xp, |
---|
1079 | to_buffer, |
---|
1080 | file_offset, |
---|
1081 | buffer_xp, |
---|
1082 | size ); |
---|
1083 | if( error ) |
---|
1084 | { |
---|
1085 | |
---|
1086 | #if DEBUG_VFS_ERROR |
---|
1087 | printk("\n[ERROR] in %s : thread[%x,%x] / cannot move data / cycle %d\n", |
---|
1088 | __FUNCTION__ , this->process->pid , this->trdid , cycle ); |
---|
1089 | #endif |
---|
1090 | return -1; |
---|
1091 | |
---|
1092 | } |
---|
1093 | |
---|
1094 | #if DEBUG_VFS_KERNEL_MOVE |
---|
1095 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1096 | cxy_t buffer_cxy = GET_CXY( buffer_xp ); |
---|
1097 | void * buffer_ptr = GET_PTR( buffer_xp ); |
---|
1098 | vfs_inode_t * inode = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
1099 | vfs_inode_get_name( XPTR( file_cxy , inode ) , name ); |
---|
1100 | if( cycle > DEBUG_VFS_KERNEL_MOVE ) |
---|
1101 | { |
---|
1102 | if( to_buffer ) |
---|
1103 | printk("\n[%s] thread[%x,%x] moves %d bytes from <%s> mapper to buffer(%x,%x) / cycle %d\n", |
---|
1104 | __FUNCTION__ , this->process->pid, this->trdid, size, name, buffer_cxy, buffer_ptr ); |
---|
1105 | else |
---|
1106 | printk("\n[%s] thread[%x,%x] moves %d bytes from buffer(%x,%x) to <%s> mapper / cycle %d\n", |
---|
1107 | __FUNCTION__ , this->process->pid, this->trdid, size, buffer_cxy, buffer_ptr, name ); |
---|
1108 | } |
---|
1109 | #endif |
---|
1110 | |
---|
1111 | return 0; |
---|
1112 | |
---|
1113 | } // end vfs_kernel_move() |
---|
1114 | |
---|
1115 | ////////////////////////////////////// |
---|
1116 | error_t vfs_lseek( xptr_t file_xp, |
---|
1117 | uint32_t offset, |
---|
1118 | uint32_t whence, |
---|
1119 | uint32_t * new_offset ) |
---|
1120 | { |
---|
1121 | xptr_t offset_xp; |
---|
1122 | xptr_t lock_xp; |
---|
1123 | xptr_t size_xp; |
---|
1124 | cxy_t file_cxy; |
---|
1125 | vfs_file_t * file_ptr; |
---|
1126 | vfs_inode_t * inode_ptr; |
---|
1127 | uint32_t new; |
---|
1128 | |
---|
1129 | // check arguments |
---|
1130 | assert( __FUNCTION__, (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL" ); |
---|
1131 | assert( __FUNCTION__, (new_offset != NULL ) , "new_offset == NULL" ); |
---|
1132 | |
---|
1133 | #if DEBUG_VFS_LSEEK || DEBUG_VFS_ERROR |
---|
1134 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1135 | thread_t * this = CURRENT_THREAD; |
---|
1136 | #endif |
---|
1137 | |
---|
1138 | // get cluster and local pointer on remote file descriptor |
---|
1139 | file_cxy = GET_CXY( file_xp ); |
---|
1140 | file_ptr = GET_PTR( file_xp ); |
---|
1141 | |
---|
1142 | // get local pointer on remote inode |
---|
1143 | inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
1144 | |
---|
1145 | // build extended pointers on lock, offset and size |
---|
1146 | offset_xp = XPTR( file_cxy , &file_ptr->offset ); |
---|
1147 | lock_xp = XPTR( file_cxy , &file_ptr->lock ); |
---|
1148 | size_xp = XPTR( file_cxy , &inode_ptr->size ); |
---|
1149 | |
---|
1150 | // take file descriptor lock |
---|
1151 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1152 | |
---|
1153 | if ( whence == SEEK_CUR ) // new = current + offset |
---|
1154 | { |
---|
1155 | new = hal_remote_l32( offset_xp ) + offset; |
---|
1156 | } |
---|
1157 | else if ( whence == SEEK_SET ) // new = offset |
---|
1158 | { |
---|
1159 | new = offset; |
---|
1160 | } |
---|
1161 | else if ( whence == SEEK_END ) // new = size + offset |
---|
1162 | { |
---|
1163 | new = hal_remote_l32( size_xp ) + offset; |
---|
1164 | } |
---|
1165 | else |
---|
1166 | { |
---|
1167 | |
---|
1168 | #if DEBUG_VFS_ERROR |
---|
1169 | printk("\n[ERROR] in %s : thread[%x,%x] / undefined whence value / cycle %d", |
---|
1170 | __FUNCTION__ , this->process->pid , this->trdid , cycle ); |
---|
1171 | #endif |
---|
1172 | remote_rwlock_wr_release( lock_xp ); |
---|
1173 | return -1; |
---|
1174 | } |
---|
1175 | |
---|
1176 | #if DEBUG_VFS_LSEEK |
---|
1177 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1178 | thread_t * this = CURRENT_THREAD; |
---|
1179 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1180 | vfs_inode_get_name( XPTR( file_cxy , inode_ptr ) , name ); |
---|
1181 | if( cycle > DEBUG_VFS_LSEEK ) |
---|
1182 | printk("\n[%s] thread[%x,%x] for <%s> / new offset %d / cycle %d\n", |
---|
1183 | __FUNCTION__ , this->process->pid, this->trdid, name, new, cycle ); |
---|
1184 | #endif |
---|
1185 | |
---|
1186 | // set new offset |
---|
1187 | hal_remote_s32( offset_xp , new ); |
---|
1188 | |
---|
1189 | // release file descriptor lock |
---|
1190 | remote_rwlock_wr_release( lock_xp ); |
---|
1191 | |
---|
1192 | // success |
---|
1193 | *new_offset = new; |
---|
1194 | return 0; |
---|
1195 | |
---|
1196 | } // vfs_lseek() |
---|
1197 | |
---|
1198 | //////////////////////////////////// |
---|
1199 | error_t vfs_close( xptr_t file_xp, |
---|
1200 | uint32_t file_id ) |
---|
1201 | { |
---|
1202 | cxy_t file_cxy; // cluster containing the file descriptor. |
---|
1203 | vfs_file_t * file_ptr; // local pointer on file descriptor |
---|
1204 | cxy_t owner_cxy; // process owner cluster |
---|
1205 | pid_t pid; // process identifier |
---|
1206 | lpid_t lpid; // process local index |
---|
1207 | xptr_t root_xp; // root of xlist (processes , or dentries) |
---|
1208 | xptr_t lock_xp; // lock protecting the xlist |
---|
1209 | xptr_t iter_xp; // iterator on xlist |
---|
1210 | mapper_t * mapper_ptr; // local pointer on associated mapper |
---|
1211 | vfs_inode_t * inode_ptr; // local pointer on associated inode |
---|
1212 | uint32_t size; // current file size (from inode descriptor) |
---|
1213 | error_t error; |
---|
1214 | |
---|
1215 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // file name |
---|
1216 | |
---|
1217 | // check argument |
---|
1218 | assert( __FUNCTION__, (file_xp != XPTR_NULL) , "file_xp is XPTR_NULL" ); |
---|
1219 | |
---|
1220 | thread_t * this = CURRENT_THREAD; |
---|
1221 | process_t * process = this->process; |
---|
1222 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
1223 | |
---|
1224 | #if DEBUG_VFS_CLOSE || DEBUG_VFS_ERROR |
---|
1225 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1226 | #endif |
---|
1227 | |
---|
1228 | // get file name |
---|
1229 | vfs_file_get_name( file_xp , name ); |
---|
1230 | |
---|
1231 | #if DEBUG_VFS_CLOSE |
---|
1232 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
1233 | printk("\n[%s] thread[%x,%x] enter for <%s> / cycle %d\n", |
---|
1234 | __FUNCTION__, process->pid, this->trdid, name, cycle ); |
---|
1235 | #endif |
---|
1236 | |
---|
1237 | // get cluster and local pointer on remote file descriptor |
---|
1238 | file_cxy = GET_CXY( file_xp ); |
---|
1239 | file_ptr = GET_PTR( file_xp ); |
---|
1240 | |
---|
1241 | //////// 1) update all dirty pages from mapper to device |
---|
1242 | |
---|
1243 | // get local pointer on mapper associated to file |
---|
1244 | mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
1245 | |
---|
1246 | // copy all dirty pages from mapper to device |
---|
1247 | error = mapper_sync( XPTR( file_cxy , mapper_ptr ) ); |
---|
1248 | |
---|
1249 | if( error ) |
---|
1250 | { |
---|
1251 | |
---|
1252 | #if DEBUG_VFS_ERROR |
---|
1253 | printk("\n[ERROR] in %s : thread[%x,%x] / cannot synchronise dirty pages for <%s> / cycle %d\n", |
---|
1254 | __FUNCTION__ , this->process->pid , this->trdid , name , cycle ); |
---|
1255 | #endif |
---|
1256 | return -1; |
---|
1257 | } |
---|
1258 | |
---|
1259 | #if DEBUG_VFS_CLOSE |
---|
1260 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
1261 | printk("\n[%s] thread[%x,%x] synchronised <%s> mapper to device\n", |
---|
1262 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
1263 | #endif |
---|
1264 | |
---|
1265 | //////// 2) update file size in all parent directory mapper(s) and update device |
---|
1266 | |
---|
1267 | // get local pointer on remote inode |
---|
1268 | inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
1269 | |
---|
1270 | // get file size from remote inode |
---|
1271 | size = hal_remote_l32( XPTR( file_cxy , &inode_ptr->size ) ); |
---|
1272 | |
---|
1273 | // get root of list of parents dentry |
---|
1274 | root_xp = XPTR( file_cxy , &inode_ptr->parents ); |
---|
1275 | |
---|
1276 | // loop on all parents |
---|
1277 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1278 | { |
---|
1279 | // get pointers on parent directory dentry |
---|
1280 | xptr_t parent_dentry_xp = XLIST_ELEMENT( iter_xp , vfs_dentry_t , parents ); |
---|
1281 | cxy_t parent_cxy = GET_CXY( parent_dentry_xp ); |
---|
1282 | vfs_dentry_t * parent_dentry_ptr = GET_PTR( parent_dentry_xp ); |
---|
1283 | |
---|
1284 | // get local pointer on parent directory inode |
---|
1285 | vfs_inode_t * parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy, |
---|
1286 | &parent_dentry_ptr->parent ) ); |
---|
1287 | |
---|
1288 | // get local pointer on parent directory mapper |
---|
1289 | mapper_t * parent_mapper_ptr = hal_remote_lpt( XPTR( parent_cxy, |
---|
1290 | &parent_inode_ptr->mapper ) ); |
---|
1291 | |
---|
1292 | // update dentry size in parent directory mapper |
---|
1293 | error = vfs_fs_update_dentry( XPTR( parent_cxy , parent_inode_ptr ), |
---|
1294 | parent_dentry_ptr ); |
---|
1295 | |
---|
1296 | if( error ) |
---|
1297 | { |
---|
1298 | |
---|
1299 | #if DEBUG_VFS_ERROR |
---|
1300 | printk("\n[ERROR] in %s : thread[%x,%x] / cannot update size in parent / cycle %d\n", |
---|
1301 | __FUNCTION__ , this->process->pid , this->trdid , cycle ); |
---|
1302 | #endif |
---|
1303 | return -1; |
---|
1304 | } |
---|
1305 | |
---|
1306 | #if DEBUG_VFS_CLOSE |
---|
1307 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1308 | vfs_inode_get_name( XPTR( parent_cxy , parent_inode_ptr ) , parent_name ); |
---|
1309 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
1310 | printk("\n[%s] thread[%x,%x] updated <%s> in <%s> / size = %d bytes\n", |
---|
1311 | __FUNCTION__, process->pid, this->trdid, name, parent_name, size ); |
---|
1312 | #endif |
---|
1313 | |
---|
1314 | // copy all dirty pages from parent mapper to device |
---|
1315 | error = mapper_sync( XPTR( parent_cxy , parent_mapper_ptr ) ); |
---|
1316 | |
---|
1317 | if( error ) |
---|
1318 | { |
---|
1319 | |
---|
1320 | #if DEBUG_VFS_ERROR |
---|
1321 | printk("\n[ERROR] in %s : thread[%x,%x] / cannot synchronise mapper & device / cycle %d\n", |
---|
1322 | __FUNCTION__ , this->process->pid , this->trdid , cycle ); |
---|
1323 | #endif |
---|
1324 | return -1; |
---|
1325 | } |
---|
1326 | |
---|
1327 | #if DEBUG_VFS_CLOSE |
---|
1328 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
1329 | printk("\n[%s] thread[%x,%x] synchonized mapper of parent <%s> to device\n", |
---|
1330 | __FUNCTION__, process->pid, this->trdid, parent_name ); |
---|
1331 | #endif |
---|
1332 | |
---|
1333 | } |
---|
1334 | |
---|
1335 | //////// 3) loop on the process copies to reset all fd_array[file_id] entries |
---|
1336 | |
---|
1337 | // get owner process cluster and lpid |
---|
1338 | pid = process->pid; |
---|
1339 | owner_cxy = CXY_FROM_PID( pid ); |
---|
1340 | lpid = LPID_FROM_PID( pid ); |
---|
1341 | |
---|
1342 | // get extended pointers on copies root and lock |
---|
1343 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
1344 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
1345 | |
---|
1346 | // take the lock protecting the list of copies |
---|
1347 | remote_queuelock_acquire( lock_xp ); |
---|
1348 | |
---|
1349 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1350 | { |
---|
1351 | xptr_t process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
1352 | cxy_t process_cxy = GET_CXY( process_xp ); |
---|
1353 | process_t * process_ptr = GET_PTR( process_xp ); |
---|
1354 | |
---|
1355 | xptr_t entry_xp = XPTR( process_cxy , &process_ptr->fd_array.array[file_id] ); |
---|
1356 | hal_remote_s64( entry_xp , XPTR_NULL ); |
---|
1357 | hal_fence(); |
---|
1358 | } |
---|
1359 | |
---|
1360 | // release the lock protecting the list of copies |
---|
1361 | remote_queuelock_release( lock_xp ); |
---|
1362 | |
---|
1363 | #if DEBUG_VFS_CLOSE |
---|
1364 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
1365 | printk("\n[%s] thread[%x,%x] reset all fd-array copies for <%s>\n", |
---|
1366 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
1367 | #endif |
---|
1368 | |
---|
1369 | //////// 4) release memory allocated to file descriptor in remote cluster |
---|
1370 | |
---|
1371 | vfs_file_destroy( file_xp ); |
---|
1372 | |
---|
1373 | #if DEBUG_VFS_CLOSE |
---|
1374 | cycle = (uint32_t)hal_get_cycles(); |
---|
1375 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
1376 | printk("\n[%s] thread[%x,%x] exit / closed <%s> in process %x / cycle %d\n", |
---|
1377 | __FUNCTION__, process->pid, this->trdid, name, process->pid, cycle ); |
---|
1378 | #endif |
---|
1379 | |
---|
1380 | return 0; |
---|
1381 | |
---|
1382 | } // end vfs_close() |
---|
1383 | |
---|
1384 | //////////////////////////////////// |
---|
1385 | error_t vfs_mkdir( xptr_t root_xp, |
---|
1386 | char * path, |
---|
1387 | uint32_t rights ) |
---|
1388 | { |
---|
1389 | error_t error; |
---|
1390 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1391 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
1392 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1393 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1394 | xptr_t inode_xp; // extended pointer on new directory inode |
---|
1395 | vfs_inode_t * inode_ptr; // local pointer on new directory inode |
---|
1396 | cxy_t inode_cxy; // new directory inode cluster identifier |
---|
1397 | xptr_t dentry_xp; // extended pointer on new dentry |
---|
1398 | vfs_dentry_t * dentry_ptr; // new dentry local pointer |
---|
1399 | xptr_t parent_xp; // extended pointer on parent inode |
---|
1400 | vfs_inode_t * parent_ptr; // local pointer on parent inode |
---|
1401 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
1402 | vfs_ctx_t * parent_ctx_ptr; // local pointer on parent inode context |
---|
1403 | uint32_t parent_fs_type; // parent inode file system type |
---|
1404 | |
---|
1405 | xptr_t parents_root_xp; // extended pointer on parents field in inode (root) |
---|
1406 | xptr_t parents_entry_xp; // extended pointer on parents field in dentry |
---|
1407 | xptr_t children_xhtab_xp; // extended pointer on children field in inode (root) |
---|
1408 | xptr_t children_entry_xp; // extended pointer on children field in dentry |
---|
1409 | |
---|
1410 | char last_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1411 | |
---|
1412 | #if DEBUG_VFS_MKDIR || DEBUG_VFS_ERROR |
---|
1413 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1414 | #endif |
---|
1415 | |
---|
1416 | thread_t * this = CURRENT_THREAD; |
---|
1417 | process_t * process = this->process; |
---|
1418 | |
---|
1419 | #if DEBUG_VFS_MKDIR |
---|
1420 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1421 | vfs_inode_get_name( root_xp , root_name ); |
---|
1422 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1423 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / cycle %d\n", |
---|
1424 | __FUNCTION__, process->pid, this->trdid, root_name, path, cycle ); |
---|
1425 | #endif |
---|
1426 | |
---|
1427 | // build extended pointer on lock protecting Inode-Tree (in VFS root inode) |
---|
1428 | vfs_root_xp = process->vfs_root_xp; |
---|
1429 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1430 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1431 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1432 | |
---|
1433 | // take the lock protecting Inode Tree in write mode |
---|
1434 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1435 | |
---|
1436 | // 1. get pointers on parent inode |
---|
1437 | error = vfs_lookup( root_xp, |
---|
1438 | path, |
---|
1439 | VFS_LOOKUP_DIR | VFS_LOOKUP_PARENT, |
---|
1440 | &parent_xp, |
---|
1441 | last_name ); |
---|
1442 | if( error ) |
---|
1443 | { |
---|
1444 | |
---|
1445 | #if DEBUG_VFS_ERROR |
---|
1446 | printk("\n[ERROR] in %s : thread[%x,%x] cannot get parent inode for <%s> / cycle %d\n", |
---|
1447 | __FUNCTION__, process->pid, this->trdid, path , cycle ); |
---|
1448 | #endif |
---|
1449 | remote_rwlock_wr_release( lock_xp ); |
---|
1450 | return -1; |
---|
1451 | } |
---|
1452 | |
---|
1453 | // get parent inode cluster and local pointer |
---|
1454 | parent_cxy = GET_CXY( parent_xp ); |
---|
1455 | parent_ptr = GET_PTR( parent_xp ); |
---|
1456 | |
---|
1457 | #if( DEBUG_VFS_MKDIR & 1 ) |
---|
1458 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1459 | printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n", |
---|
1460 | __FUNCTION__, process->pid, this->trdid, parent_cxy, parent_ptr, path ); |
---|
1461 | #endif |
---|
1462 | |
---|
1463 | // get parent inode context, and FS type |
---|
1464 | parent_ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
1465 | parent_fs_type = hal_remote_l32( XPTR( parent_cxy , &parent_ctx_ptr->type ) ); |
---|
1466 | |
---|
1467 | // 2. create one new dentry in parent cluster |
---|
1468 | error = vfs_dentry_create( parent_cxy, |
---|
1469 | parent_fs_type, |
---|
1470 | last_name, |
---|
1471 | &dentry_xp ); |
---|
1472 | if( error ) |
---|
1473 | { |
---|
1474 | |
---|
1475 | #if DEBUG_VFS_ERROR |
---|
1476 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create dentry in cluster %x for <%s> / cycle %d\n", |
---|
1477 | __FUNCTION__, process->pid, this->trdid, parent_cxy, path , cycle ); |
---|
1478 | #endif |
---|
1479 | remote_rwlock_wr_release( lock_xp ); |
---|
1480 | return -1; |
---|
1481 | } |
---|
1482 | |
---|
1483 | // get local pointer on dentry |
---|
1484 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1485 | |
---|
1486 | #if( DEBUG_VFS_MKDIR & 1 ) |
---|
1487 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1488 | printk("\n[%s] thread[%x,%x] created new dentry (%x,%x) for <%s>\n", |
---|
1489 | __FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, path ); |
---|
1490 | #endif |
---|
1491 | |
---|
1492 | // 3. create new directory inode |
---|
1493 | // TODO : define attr / uid / gid |
---|
1494 | uint32_t attr = 0; |
---|
1495 | uint32_t uid = 0; |
---|
1496 | uint32_t gid = 0; |
---|
1497 | |
---|
1498 | // select a target cluster for new inode |
---|
1499 | inode_cxy = cluster_random_select(); |
---|
1500 | |
---|
1501 | // create inode |
---|
1502 | error = vfs_inode_create( inode_cxy, |
---|
1503 | parent_fs_type, |
---|
1504 | attr, |
---|
1505 | rights, |
---|
1506 | uid, |
---|
1507 | gid, |
---|
1508 | &inode_xp ); |
---|
1509 | if( error ) |
---|
1510 | { |
---|
1511 | |
---|
1512 | #if DEBUG_VFS_ERROR |
---|
1513 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create inode in cluster %x for <%s> / cycle %d\n", |
---|
1514 | __FUNCTION__, process->pid, this->trdid, parent_cxy, path , cycle ); |
---|
1515 | #endif |
---|
1516 | remote_rwlock_wr_release( lock_xp ); |
---|
1517 | vfs_dentry_destroy( dentry_xp ); |
---|
1518 | return -1; |
---|
1519 | } |
---|
1520 | |
---|
1521 | // get new inode local pointer |
---|
1522 | inode_ptr = GET_PTR( inode_xp ); |
---|
1523 | |
---|
1524 | // update inode "type" field |
---|
1525 | hal_remote_s32( XPTR( inode_cxy , &inode_ptr->type ) , FILE_TYPE_DIR ); |
---|
1526 | |
---|
1527 | #if(DEBUG_VFS_MKDIR & 1) |
---|
1528 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1529 | printk("\n[%s] thread[%x,%x] created new inode (%x,%x) for <%s>\n", |
---|
1530 | __FUNCTION__ , process->pid, this->trdid, inode_cxy, inode_ptr, path ); |
---|
1531 | #endif |
---|
1532 | |
---|
1533 | // 4. register dentry in new inode list of parents |
---|
1534 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
1535 | parents_entry_xp = XPTR( parent_cxy , &dentry_ptr->parents ); |
---|
1536 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
1537 | hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 ); |
---|
1538 | |
---|
1539 | // 5. register dentry in parent inode |
---|
1540 | children_xhtab_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
1541 | children_entry_xp = XPTR( parent_cxy , &dentry_ptr->children ); |
---|
1542 | xhtab_insert( children_xhtab_xp , last_name , children_entry_xp ); |
---|
1543 | |
---|
1544 | // 6. update "parent" and "child_xp" fields in dentry |
---|
1545 | hal_remote_s64( XPTR( parent_cxy , &dentry_ptr->child_xp ) , inode_xp ); |
---|
1546 | hal_remote_spt( XPTR( parent_cxy , &dentry_ptr->parent ) , parent_ptr ); |
---|
1547 | |
---|
1548 | #if(DEBUG_VFS_MKDIR & 1) |
---|
1549 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1550 | printk("\n[%s] thread[%x,%x] updated Inode Tree for <%s>\n", |
---|
1551 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
1552 | #endif |
---|
1553 | |
---|
1554 | // 7. create the two special dentries <.> and <..> in new directory |
---|
1555 | // both the new directory mapper, and the Inode Tree are updated |
---|
1556 | error = vfs_add_special_dentries( inode_xp, |
---|
1557 | parent_xp ); |
---|
1558 | |
---|
1559 | if( error ) |
---|
1560 | { |
---|
1561 | |
---|
1562 | #if DEBUG_VFS_ERROR |
---|
1563 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create <.> & <..> dentries for <%s> / cycle %d\n", |
---|
1564 | __FUNCTION__, process->pid, this->trdid, path , cycle ); |
---|
1565 | #endif |
---|
1566 | vfs_remove_child_from_parent( dentry_xp ); |
---|
1567 | remote_rwlock_wr_release( lock_xp ); |
---|
1568 | return -1; |
---|
1569 | } |
---|
1570 | |
---|
1571 | // release the lock protecting Inode Tree |
---|
1572 | remote_rwlock_wr_release( lock_xp ); |
---|
1573 | |
---|
1574 | // 8. update parent directory mapper |
---|
1575 | // and synchronize the parent directory on IOC device |
---|
1576 | error = vfs_fs_add_dentry( parent_xp, |
---|
1577 | dentry_ptr ); |
---|
1578 | if( error ) |
---|
1579 | { |
---|
1580 | |
---|
1581 | #if DEBUG_VFS_ERROR |
---|
1582 | printk("\n[ERROR] in %s : thread[%x,%x] cannot update parent directory for <%s> / cycle %d\n", |
---|
1583 | __FUNCTION__, process->pid, this->trdid, path , cycle ); |
---|
1584 | #endif |
---|
1585 | vfs_remove_child_from_parent( dentry_xp ); |
---|
1586 | return -1; |
---|
1587 | } |
---|
1588 | |
---|
1589 | #if(DEBUG_VFS_MKDIR & 1) |
---|
1590 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1591 | printk("\n[%s] thread[%x,%x] created <%s> dir (Inode-Tree, Mapper and IOC)\n", |
---|
1592 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
1593 | #endif |
---|
1594 | |
---|
1595 | return 0; |
---|
1596 | |
---|
1597 | } // end vfs_mkdir() |
---|
1598 | |
---|
1599 | /////////////////////////////////////// |
---|
1600 | error_t vfs_link( xptr_t old_root_xp, |
---|
1601 | char * old_path, |
---|
1602 | xptr_t new_root_xp, |
---|
1603 | char * new_path ) |
---|
1604 | { |
---|
1605 | error_t error; |
---|
1606 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1607 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
1608 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1609 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1610 | xptr_t inode_xp; // extended pointer on target inode |
---|
1611 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
1612 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1613 | uint32_t inode_type; // target inode type |
---|
1614 | vfs_ctx_t * inode_ctx_ptr; // local pointer on target inode context |
---|
1615 | uint32_t inode_fs_type; // target inode file system type |
---|
1616 | xptr_t dentry_xp; // extended pointer on new dentry |
---|
1617 | vfs_dentry_t * dentry_ptr; // target dentry local pointer |
---|
1618 | xptr_t new_parent_xp; // extended pointer on new parent inode |
---|
1619 | vfs_inode_t * new_parent_ptr; // local pointer on new parent inode |
---|
1620 | cxy_t new_parent_cxy; // new parent inode cluster identifier |
---|
1621 | |
---|
1622 | xptr_t parents_root_xp; // extended pointer on parents field in inode (root) |
---|
1623 | xptr_t parents_entry_xp; // extended pointer on parents field in dentry |
---|
1624 | xptr_t children_xhtab_xp; // extended pointer on children field in inode (root) |
---|
1625 | xptr_t children_entry_xp; // extended pointer on children field in dentry |
---|
1626 | |
---|
1627 | char new_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1628 | |
---|
1629 | #if DEBUG_VFS_LINK || DEBUG_VFS_ERROR |
---|
1630 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1631 | #endif |
---|
1632 | |
---|
1633 | thread_t * this = CURRENT_THREAD; |
---|
1634 | process_t * process = this->process; |
---|
1635 | |
---|
1636 | #if DEBUG_VFS_LINK |
---|
1637 | char old_root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1638 | char new_root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1639 | vfs_inode_get_name( old_root_xp , old_root_name ); |
---|
1640 | vfs_inode_get_name( new_root_xp , new_root_name ); |
---|
1641 | if( DEBUG_VFS_LINK < cycle ) |
---|
1642 | printk("\n[%s] thread[%x,%x] enter / old_root <%s> / old_path <%s> / " |
---|
1643 | "new_root <%s> / new_path <%s> / cycle %d\n", |
---|
1644 | __FUNCTION__, process->pid, this->trdid, |
---|
1645 | old_root_name, old_path, new_root_name, new_path, cycle ); |
---|
1646 | #endif |
---|
1647 | |
---|
1648 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1649 | vfs_root_xp = process->vfs_root_xp; |
---|
1650 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1651 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1652 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1653 | |
---|
1654 | // take the lock protecting Inode Tree in write mode |
---|
1655 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1656 | |
---|
1657 | // get extended pointer on target inode |
---|
1658 | error = vfs_lookup( old_root_xp, |
---|
1659 | old_path, |
---|
1660 | 0, |
---|
1661 | &inode_xp, |
---|
1662 | NULL ); |
---|
1663 | if( error ) |
---|
1664 | { |
---|
1665 | |
---|
1666 | #if DEBUG_VFS_ERROR |
---|
1667 | printk("\n[ERROR] in %s : thread[%x,%x] cannot get target inode for <%s> / cycle %d\n", |
---|
1668 | __FUNCTION__, process->pid, this->trdid, old_path , cycle ); |
---|
1669 | #endif |
---|
1670 | remote_rwlock_wr_release( lock_xp ); |
---|
1671 | return -1; |
---|
1672 | } |
---|
1673 | |
---|
1674 | #if( DEBUG_VFS_LINK & 1 ) |
---|
1675 | if( DEBUG_VFS_LINK < cycle ) |
---|
1676 | printk("\n[%s] thread[%x,%x] get child inode (%x,%x) for <%s>\n", |
---|
1677 | __FUNCTION__, process->pid, this->trdid, |
---|
1678 | GET_CXY(inode_xp), GET_PTR(inode_xp), old_path, cycle ); |
---|
1679 | #endif |
---|
1680 | |
---|
1681 | // get extended pointer on parent inode in new path |
---|
1682 | error = vfs_lookup( new_root_xp, |
---|
1683 | new_path, |
---|
1684 | VFS_LOOKUP_PARENT, |
---|
1685 | &new_parent_xp, |
---|
1686 | new_name ); |
---|
1687 | if( error ) |
---|
1688 | { |
---|
1689 | |
---|
1690 | #if DEBUG_VFS_ERROR |
---|
1691 | printk("\n[ERROR] in %s : thread[%x,%x] cannot get parent inode for <%s> / cycle %d\n", |
---|
1692 | __FUNCTION__, process->pid, this->trdid, new_path , cycle ); |
---|
1693 | #endif |
---|
1694 | remote_rwlock_wr_release( lock_xp ); |
---|
1695 | return -1; |
---|
1696 | } |
---|
1697 | |
---|
1698 | #if( DEBUG_VFS_LINK & 1 ) |
---|
1699 | if( DEBUG_VFS_LINK < cycle ) |
---|
1700 | printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n", |
---|
1701 | __FUNCTION__, process->pid, this->trdid, |
---|
1702 | GET_CXY(new_parent_xp), GET_PTR(new_parent_xp), new_path ); |
---|
1703 | #endif |
---|
1704 | |
---|
1705 | // get target inode cluster and local pointer |
---|
1706 | inode_cxy = GET_CXY( inode_xp ); |
---|
1707 | inode_ptr = GET_PTR( inode_xp ); |
---|
1708 | |
---|
1709 | // get target inode type, context, and FS type |
---|
1710 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1711 | inode_ctx_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->ctx ) ); |
---|
1712 | inode_fs_type = hal_remote_l32( XPTR( inode_cxy , &inode_ctx_ptr->type ) ); |
---|
1713 | |
---|
1714 | // get new parent inode cluster an local pointer |
---|
1715 | new_parent_ptr = GET_PTR( new_parent_xp ); |
---|
1716 | new_parent_cxy = GET_CXY( new_parent_xp ); |
---|
1717 | |
---|
1718 | /////////////////////////////////////////////////////////////////////// |
---|
1719 | if( (inode_type == FILE_TYPE_REG) || (inode_type == FILE_TYPE_DIR) ) |
---|
1720 | { |
---|
1721 | // 1. create one new dentry |
---|
1722 | error = vfs_dentry_create( new_parent_cxy, |
---|
1723 | inode_fs_type, |
---|
1724 | new_name, |
---|
1725 | &dentry_xp ); |
---|
1726 | if( error ) |
---|
1727 | { |
---|
1728 | |
---|
1729 | #if DEBUG_VFS_ERROR |
---|
1730 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create new dentry for <%s> / cycle %d\n", |
---|
1731 | __FUNCTION__, process->pid, this->trdid, new_path , cycle ); |
---|
1732 | #endif |
---|
1733 | remote_rwlock_wr_release( lock_xp ); |
---|
1734 | return -1; |
---|
1735 | } |
---|
1736 | |
---|
1737 | // get local pointer on dentry |
---|
1738 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1739 | |
---|
1740 | // 2. register dentry in target inode |
---|
1741 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
1742 | parents_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->parents ); |
---|
1743 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
1744 | hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 ); |
---|
1745 | |
---|
1746 | // 3. register dentry in parent inode |
---|
1747 | children_xhtab_xp = XPTR( new_parent_cxy , &new_parent_ptr->children ); |
---|
1748 | children_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->children ); |
---|
1749 | xhtab_insert( children_xhtab_xp , new_name , children_entry_xp ); |
---|
1750 | |
---|
1751 | // 4. update "parent" and "child_xp" fields in dentry |
---|
1752 | hal_remote_s64( XPTR( new_parent_cxy , &dentry_ptr->child_xp ) , inode_xp ); |
---|
1753 | hal_remote_spt( XPTR( new_parent_cxy , &dentry_ptr->parent ) , new_parent_ptr ); |
---|
1754 | |
---|
1755 | #if(DEBUG_VFS_LINK & 1) |
---|
1756 | if( DEBUG_VFS_LINK < cycle ) |
---|
1757 | printk("\n[%s] thread[%x,%x] updated Inode Tree / old <%s> / new <%s>\n", |
---|
1758 | __FUNCTION__, process->pid, this->trdid, old_path, new_path ); |
---|
1759 | vfs_display( new_parent_xp ); |
---|
1760 | #endif |
---|
1761 | |
---|
1762 | // release the lock protecting Inode Tree |
---|
1763 | remote_rwlock_wr_release( lock_xp ); |
---|
1764 | |
---|
1765 | // 5. update new parent directory mapper in Inode Tree |
---|
1766 | // and synchronize the parent directory on IOC device |
---|
1767 | if (new_parent_cxy == local_cxy) |
---|
1768 | error = vfs_fs_add_dentry( new_parent_xp, |
---|
1769 | dentry_ptr ); |
---|
1770 | if( error ) |
---|
1771 | { |
---|
1772 | |
---|
1773 | #if DEBUG_VFS_ERROR |
---|
1774 | printk("\n[ERROR] in %s : thread[%x,%x] cannot update parent directory for <%s> / cycle %d\n", |
---|
1775 | __FUNCTION__, process->pid, this->trdid, new_path , cycle ); |
---|
1776 | #endif |
---|
1777 | return -1; |
---|
1778 | } |
---|
1779 | |
---|
1780 | #if(DEBUG_VFS_LINK & 1) |
---|
1781 | if( DEBUG_VFS_LINK < cycle ) |
---|
1782 | printk("\n[%s] thread[%x,%x] updated new parent dir (mapper and IOC) / old <%s> / new <%s>\n", |
---|
1783 | __FUNCTION__, process->pid, this->trdid, old_path, new_path ); |
---|
1784 | #endif |
---|
1785 | return 0; |
---|
1786 | } |
---|
1787 | else |
---|
1788 | { |
---|
1789 | |
---|
1790 | #if DEBUG_VFS_ERROR |
---|
1791 | printk("\n[ERROR] in %s : thread[%x,%x] / unsupported inode type %s / cycle %d\n", |
---|
1792 | __FUNCTION__, process->pid, this->trdid, vfs_inode_type_str( inode_type ), cycle ); |
---|
1793 | #endif |
---|
1794 | remote_rwlock_wr_release( lock_xp ); |
---|
1795 | return -1; |
---|
1796 | } |
---|
1797 | |
---|
1798 | } // end vfs_link() |
---|
1799 | |
---|
1800 | ///////////////////////////////////// |
---|
1801 | error_t vfs_unlink( xptr_t root_xp, |
---|
1802 | char * path ) |
---|
1803 | { |
---|
1804 | error_t error; |
---|
1805 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1806 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
1807 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1808 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1809 | xptr_t parent_xp; // extended pointer on target inode |
---|
1810 | cxy_t parent_cxy; // target inode cluster identifier |
---|
1811 | vfs_inode_t * parent_ptr; // target inode local pointer |
---|
1812 | xptr_t inode_xp; // extended pointer on target inode |
---|
1813 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1814 | vfs_inode_t * inode_ptr; // target inode local pointer |
---|
1815 | uint32_t inode_links; // target inode links count |
---|
1816 | vfs_file_type_t inode_type; // target inode type |
---|
1817 | uint32_t inode_children; // target inode number of children |
---|
1818 | xptr_t dentry_xp; // extended pointer on dentry to unlink |
---|
1819 | vfs_dentry_t * dentry_ptr; // local pointer on dentry to unlink |
---|
1820 | vfs_ctx_t * ctx_ptr; // local pointer on FS context |
---|
1821 | vfs_fs_type_t fs_type; // File system type |
---|
1822 | |
---|
1823 | char child_name[CONFIG_VFS_MAX_NAME_LENGTH]; // name of link to remove |
---|
1824 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; // name of parent directory |
---|
1825 | |
---|
1826 | #if DEBUG_VFS_UNLINK || DEBUG_VFS_ERROR |
---|
1827 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1828 | #endif |
---|
1829 | |
---|
1830 | thread_t * this = CURRENT_THREAD; |
---|
1831 | process_t * process = this->process; |
---|
1832 | |
---|
1833 | #if DEBUG_VFS_UNLINK |
---|
1834 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1835 | vfs_inode_get_name( root_xp , root_name ); |
---|
1836 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1837 | printk("\n[%s] thread[%x,%x] : enter for root <%s> / path <%s> / cycle %d\n", |
---|
1838 | __FUNCTION__, process->pid, this->trdid, root_name, path, cycle ); |
---|
1839 | #endif |
---|
1840 | |
---|
1841 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1842 | vfs_root_xp = process->vfs_root_xp; |
---|
1843 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1844 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1845 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1846 | |
---|
1847 | // take the lock protecting Inode Tree |
---|
1848 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1849 | |
---|
1850 | // get extended pointer on parent inode |
---|
1851 | error = vfs_lookup( root_xp, |
---|
1852 | path, |
---|
1853 | VFS_LOOKUP_PARENT, |
---|
1854 | &parent_xp, |
---|
1855 | child_name ); |
---|
1856 | if( error ) |
---|
1857 | { |
---|
1858 | |
---|
1859 | #if DEBUG_VFS_ERROR |
---|
1860 | printk("\n[ERROR] in %s : thread[%x,%x] cannot get parent inode for <%s> / cycle %d\n", |
---|
1861 | __FUNCTION__, process->pid, this->trdid, path , cycle ); |
---|
1862 | #endif |
---|
1863 | remote_rwlock_wr_release( lock_xp ); |
---|
1864 | return -1; |
---|
1865 | } |
---|
1866 | |
---|
1867 | // get parent inode name, cluster and local pointer |
---|
1868 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
1869 | parent_cxy = GET_CXY( parent_xp ); |
---|
1870 | parent_ptr = GET_PTR( parent_xp ); |
---|
1871 | |
---|
1872 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1873 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1874 | printk("\n[%s] thread[%x,%x] : parent inode <%s> is (%x,%x)\n", |
---|
1875 | __FUNCTION__, process->pid, this->trdid, parent_name, parent_cxy, parent_ptr ); |
---|
1876 | #endif |
---|
1877 | |
---|
1878 | // build extended pointer on parent inode "children" xhtab |
---|
1879 | xptr_t children_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
1880 | |
---|
1881 | // try to get extended pointer on dentry from Inode Tree |
---|
1882 | dentry_xp = xhtab_lookup( children_xp , child_name ); |
---|
1883 | |
---|
1884 | // when dentry not found in Inode Tree, try to get it from mapper |
---|
1885 | |
---|
1886 | if( dentry_xp == XPTR_NULL ) // miss target dentry in Inode Tree |
---|
1887 | { |
---|
1888 | |
---|
1889 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1890 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1891 | printk("\n[%s] thread[%x,%x] : inode <%s> not found => scan parent mapper <%s>\n", |
---|
1892 | __FUNCTION__, process->pid, this->trdid, child_name , parent_name ); |
---|
1893 | #endif |
---|
1894 | // get parent inode FS type |
---|
1895 | ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
1896 | fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) ); |
---|
1897 | |
---|
1898 | // select a cluster for new inode |
---|
1899 | inode_cxy = cluster_random_select(); |
---|
1900 | |
---|
1901 | // speculatively insert a new child dentry/inode couple in inode tree |
---|
1902 | error = vfs_add_child_in_parent( inode_cxy, |
---|
1903 | fs_type, |
---|
1904 | parent_xp, |
---|
1905 | child_name, |
---|
1906 | &dentry_xp, |
---|
1907 | &inode_xp ); |
---|
1908 | if( error ) |
---|
1909 | { |
---|
1910 | |
---|
1911 | #if DEBUG_VFS_ERROR |
---|
1912 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create node <%s> in Inode_Tree / cycle %d\n", |
---|
1913 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
1914 | #endif |
---|
1915 | remote_rwlock_wr_release( lock_xp ); |
---|
1916 | return -1; |
---|
1917 | } |
---|
1918 | |
---|
1919 | // get local pointers on new dentry and new inode descriptors |
---|
1920 | inode_ptr = GET_PTR( inode_xp ); |
---|
1921 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1922 | |
---|
1923 | // scan parent mapper to find the missing dentry, and complete |
---|
1924 | // initialisation of new dentry and new inode descriptors In Inode Tree |
---|
1925 | error = vfs_fs_new_dentry_from_mapper( parent_xp, |
---|
1926 | dentry_ptr ); |
---|
1927 | if ( error ) |
---|
1928 | { |
---|
1929 | |
---|
1930 | #if DEBUG_VFS_ERROR |
---|
1931 | printk("\n[ERROR] in %s : thread[%x,%x] cannot get dentry <%s> in parent <%s> mapper / cycle %d\n", |
---|
1932 | __FUNCTION__, process->pid, this->trdid, child_name, parent_name, cycle ); |
---|
1933 | #endif |
---|
1934 | remote_rwlock_wr_release( lock_xp ); |
---|
1935 | return -1; |
---|
1936 | } |
---|
1937 | |
---|
1938 | #if (DEBUG_VFS_UNLINK & 1) |
---|
1939 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1940 | printk("\n[%s] thread[%x,%x] : created missing inode & dentry <%s> in cluster %x\n", |
---|
1941 | __FUNCTION__, process->pid, this->trdid, child_name, inode_cxy ); |
---|
1942 | #endif |
---|
1943 | |
---|
1944 | } |
---|
1945 | else // found target dentry in Inode Tree |
---|
1946 | { |
---|
1947 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1948 | |
---|
1949 | // get pointer on target inode from dentry |
---|
1950 | inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) ); |
---|
1951 | inode_cxy = GET_CXY( inode_xp ); |
---|
1952 | inode_ptr = GET_PTR( inode_xp ); |
---|
1953 | } |
---|
1954 | |
---|
1955 | // At this point the Inode-Tree contains the parent dentry and child inode |
---|
1956 | // we can safely remove this dentry from both the parent mapper, and the Inode Tree. |
---|
1957 | |
---|
1958 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1959 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1960 | printk("\n[%s] thread[%x,%x] : dentry (%x,%x) / inode (%x,%x)\n", |
---|
1961 | __FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, inode_cxy, inode_ptr ); |
---|
1962 | #endif |
---|
1963 | |
---|
1964 | // get target inode "type" and "links" |
---|
1965 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1966 | inode_links = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->links ) ); |
---|
1967 | |
---|
1968 | /////////////////////////////////////////////////////////////////////// |
---|
1969 | if( (inode_type == FILE_TYPE_REG) || (inode_type == FILE_TYPE_DIR) ) |
---|
1970 | { |
---|
1971 | |
---|
1972 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1973 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1974 | printk("\n[%s] thread[%x,%x] : unlink inode <%s> / type %s / %d links\n", |
---|
1975 | __FUNCTION__, process->pid, this->trdid, child_name, |
---|
1976 | vfs_inode_type_str(inode_type), inode_links ); |
---|
1977 | #endif |
---|
1978 | // 1. Release space allocated to inode on IOC device |
---|
1979 | // and synchronize the FAT on IOC device if last link. |
---|
1980 | if( inode_links == 1 ) |
---|
1981 | { |
---|
1982 | // build extended pointer on target inode "children" number |
---|
1983 | xptr_t inode_children_xp = XPTR( inode_cxy , &inode_ptr->children.items ); |
---|
1984 | |
---|
1985 | // get target inode number of children |
---|
1986 | inode_children = hal_remote_l32( inode_children_xp ); |
---|
1987 | |
---|
1988 | // check no children |
---|
1989 | if( inode_children != 0 ) |
---|
1990 | { |
---|
1991 | |
---|
1992 | #if DEBUG_VFS_ERROR |
---|
1993 | printk("\n[ERROR] in %s : thread[%x,%x] cannot remove <%s> inode that has children / cycle %d\n", |
---|
1994 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
1995 | #endif |
---|
1996 | remote_rwlock_wr_release( lock_xp ); |
---|
1997 | return -1; |
---|
1998 | } |
---|
1999 | |
---|
2000 | // release space on IOC device |
---|
2001 | error = vfs_fs_release_inode( inode_xp ); |
---|
2002 | |
---|
2003 | if( error ) |
---|
2004 | { |
---|
2005 | |
---|
2006 | #if DEBUG_VFS_ERROR |
---|
2007 | printk("\n[ERROR] in %s : thread[%x,%x] cannot update FAT mapper to remove <s> / cycle %d\n", |
---|
2008 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2009 | #endif |
---|
2010 | remote_rwlock_wr_release( lock_xp ); |
---|
2011 | return -1; |
---|
2012 | } |
---|
2013 | |
---|
2014 | #if(DEBUG_VFS_UNLINK & 1) |
---|
2015 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
2016 | printk("\n[%s] thread[%x,%x] removed <%s> inode from FAT (mapper and IOC device)\n", |
---|
2017 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
2018 | #endif |
---|
2019 | } |
---|
2020 | |
---|
2021 | // 2. update parent directory mapper |
---|
2022 | // and synchronize the parent directory on IOC device |
---|
2023 | error = vfs_fs_remove_dentry( parent_xp, |
---|
2024 | dentry_ptr ); |
---|
2025 | if( error ) |
---|
2026 | { |
---|
2027 | |
---|
2028 | #if DEBUG_VFS_ERROR |
---|
2029 | printk("\n[ERROR] in %s : thread[%x,%x] cannot update parent directory on IOC for <s> / cycle %d\n", |
---|
2030 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2031 | #endif |
---|
2032 | remote_rwlock_wr_release( lock_xp ); |
---|
2033 | return -1; |
---|
2034 | } |
---|
2035 | |
---|
2036 | #if(DEBUG_VFS_UNLINK & 1) |
---|
2037 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
2038 | printk("\n[%s] thread[%x,%x] removed <%s> inode from parent dir (mapper and IOC device)\n", |
---|
2039 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
2040 | #endif |
---|
2041 | // 3. remove dentry from Inode Tree (and associated child inode when last link) |
---|
2042 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2043 | |
---|
2044 | // release the lock protecting Inode Tree |
---|
2045 | remote_rwlock_wr_release( lock_xp ); |
---|
2046 | |
---|
2047 | #if DEBUG_VFS_UNLINK |
---|
2048 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
2049 | printk("\n[%s] thread[%x,%x] exit / removed <%s> inode from Inode Tree / cycle %d\n", |
---|
2050 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2051 | #endif |
---|
2052 | return 0; |
---|
2053 | } |
---|
2054 | //////////////////////////////////////// |
---|
2055 | else if( inode_type == FILE_TYPE_FIFO ) |
---|
2056 | { |
---|
2057 | // 1. destroy the associated pipe |
---|
2058 | pipe_t * pipe = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->pipe )); |
---|
2059 | pipe_destroy( XPTR( inode_cxy , pipe ) ); |
---|
2060 | |
---|
2061 | #if(DEBUG_VFS_UNLINK & 1) |
---|
2062 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
2063 | printk("\n[%s] thread[%x,%x] released <%s> pipe\n", |
---|
2064 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
2065 | #endif |
---|
2066 | |
---|
2067 | // 2. remove dentry from Inode Tree (and associated child inode when last link) |
---|
2068 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2069 | |
---|
2070 | // release the lock protecting Inode Tree |
---|
2071 | remote_rwlock_wr_release( lock_xp ); |
---|
2072 | |
---|
2073 | #if DEBUG_VFS_UNLINK |
---|
2074 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
2075 | printk("\n[%s] thread[%x,%x] exit / removed <%s> inode from Inode Tree / cycle %d\n", |
---|
2076 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2077 | #endif |
---|
2078 | return 0; |
---|
2079 | } |
---|
2080 | else |
---|
2081 | { |
---|
2082 | |
---|
2083 | #if DEBUG_VFS_ERROR |
---|
2084 | printk("\n[ERROR] in %s : thread[%x,%x] unsupported inode type %d for <s> / cycle %d\n", |
---|
2085 | __FUNCTION__, process->pid, this->trdid, vfs_inode_type_str( inode_type ), path, cycle ); |
---|
2086 | #endif |
---|
2087 | remote_rwlock_wr_release( lock_xp ); |
---|
2088 | return -1; |
---|
2089 | } |
---|
2090 | |
---|
2091 | } // end vfs_unlink() |
---|
2092 | |
---|
2093 | //////////////////////////////////////////////// |
---|
2094 | error_t vfs_stat( xptr_t root_inode_xp, |
---|
2095 | char * path, |
---|
2096 | struct stat * st ) |
---|
2097 | { |
---|
2098 | error_t error; |
---|
2099 | xptr_t inode_xp; // extended pointer on target inode |
---|
2100 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
2101 | cxy_t inode_cxy; // target inode cluster identifier |
---|
2102 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
2103 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
2104 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
2105 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
2106 | |
---|
2107 | thread_t * this = CURRENT_THREAD; |
---|
2108 | process_t * process = this->process; |
---|
2109 | |
---|
2110 | #if DEBUG_VFS_STAT || DEBUG_VFS_ERROR |
---|
2111 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2112 | #endif |
---|
2113 | |
---|
2114 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
2115 | vfs_root_xp = process->vfs_root_xp; |
---|
2116 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
2117 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
2118 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
2119 | |
---|
2120 | // get the lock protecting Inode Tree in read mode |
---|
2121 | remote_rwlock_rd_acquire( lock_xp ); |
---|
2122 | |
---|
2123 | // get extended pointer on target inode |
---|
2124 | error = vfs_lookup( root_inode_xp, |
---|
2125 | path, |
---|
2126 | 0, |
---|
2127 | &inode_xp, |
---|
2128 | NULL ); |
---|
2129 | |
---|
2130 | // release the lock protecting Inode Tree |
---|
2131 | remote_rwlock_rd_release( lock_xp ); |
---|
2132 | |
---|
2133 | if( error ) |
---|
2134 | { |
---|
2135 | |
---|
2136 | #if DEBUG_VFS_ERROR |
---|
2137 | printk("\n[ERROR] in %s : thread[%x,%x] cannot found inode <%s> / cycle %d\n", |
---|
2138 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2139 | #endif |
---|
2140 | return -1; |
---|
2141 | } |
---|
2142 | |
---|
2143 | // get cluster and local pointer on inode descriptor |
---|
2144 | inode_ptr = GET_PTR( inode_xp ); |
---|
2145 | inode_cxy = GET_CXY( inode_xp ); |
---|
2146 | |
---|
2147 | // get relevant infos from inode descriptor |
---|
2148 | uint32_t inum = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->inum ) ); |
---|
2149 | uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
2150 | uint32_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) ); |
---|
2151 | uint32_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) ); |
---|
2152 | uint32_t type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
2153 | uint32_t rights = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->rights ) ); |
---|
2154 | |
---|
2155 | // set stat structure fields |
---|
2156 | st->st_ino = inum; |
---|
2157 | st->st_gid = gid; |
---|
2158 | st->st_uid = uid; |
---|
2159 | st->st_size = size; |
---|
2160 | st->st_mode = (type << 16) | rights; |
---|
2161 | |
---|
2162 | #if DEBUG_VFS_STAT |
---|
2163 | if( DEBUG_VFS_STAT < cycle ) |
---|
2164 | printk("\n[%s] thread[%x,%x] set stat for <%s> / %s / inum %d / size %d / cycle %d\n", |
---|
2165 | __FUNCTION__, process->pid, this->trdid, path, vfs_inode_type_str( type ), inum, size, cycle ); |
---|
2166 | #endif |
---|
2167 | |
---|
2168 | return 0; |
---|
2169 | |
---|
2170 | } // end vfs_stat() |
---|
2171 | |
---|
2172 | //////////////////////////////////// |
---|
2173 | error_t vfs_chdir( xptr_t root_xp, |
---|
2174 | char * path ) |
---|
2175 | { |
---|
2176 | error_t error; |
---|
2177 | xptr_t inode_xp; // extended pointer on target inode |
---|
2178 | cxy_t inode_cxy; // target inode cluster identifier |
---|
2179 | vfs_inode_t * inode_ptr; // target inode local pointer |
---|
2180 | vfs_file_type_t inode_type; // target inode type |
---|
2181 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
2182 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
2183 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
2184 | xptr_t main_lock_xp; // extended pointer on lock protecting Inode Tree |
---|
2185 | xptr_t ref_xp; // extended pointer on reference process |
---|
2186 | process_t * ref_ptr; // local pointer on reference process |
---|
2187 | cxy_t ref_cxy; // reference process cluster |
---|
2188 | xptr_t cwd_lock_xp; // extended pointer on lock protecting CWD change |
---|
2189 | xptr_t cwd_xp_xp; // extended pointer on cwd_xp in reference process |
---|
2190 | |
---|
2191 | thread_t * this = CURRENT_THREAD; |
---|
2192 | process_t * process = this->process; |
---|
2193 | |
---|
2194 | #if DEBUG_VFS_CHDIR || DEBUG_VFS_ERROR |
---|
2195 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2196 | #endif |
---|
2197 | |
---|
2198 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
2199 | vfs_root_xp = process->vfs_root_xp; |
---|
2200 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
2201 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
2202 | main_lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
2203 | |
---|
2204 | // take lock protecting Inode Tree in read mode |
---|
2205 | remote_rwlock_rd_acquire( main_lock_xp ); |
---|
2206 | |
---|
2207 | // get extended pointer on target inode |
---|
2208 | error = vfs_lookup( root_xp, |
---|
2209 | path, |
---|
2210 | VFS_LOOKUP_DIR, |
---|
2211 | &inode_xp, |
---|
2212 | NULL ); |
---|
2213 | |
---|
2214 | // release lock protecting Inode Tree in read mode |
---|
2215 | remote_rwlock_rd_release( main_lock_xp ); |
---|
2216 | |
---|
2217 | if( error ) |
---|
2218 | { |
---|
2219 | |
---|
2220 | #if DEBUG_VFS_ERROR |
---|
2221 | printk("\n[ERROR] in %s : thread[%x,%x] cannot found inode <%s> / cycle %d\n", |
---|
2222 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2223 | #endif |
---|
2224 | return -1; |
---|
2225 | } |
---|
2226 | |
---|
2227 | // get inode type from remote file |
---|
2228 | inode_cxy = GET_CXY( inode_xp ); |
---|
2229 | inode_ptr = GET_PTR( inode_xp ); |
---|
2230 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
2231 | |
---|
2232 | if( inode_type != FILE_TYPE_DIR ) |
---|
2233 | { |
---|
2234 | |
---|
2235 | #if DEBUG_VFS_ERROR |
---|
2236 | printk("\n[ERROR] in %s : thread[%x,%x] / <%s> is not a directory / cycle %d\n", |
---|
2237 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2238 | #endif |
---|
2239 | return -1; |
---|
2240 | } |
---|
2241 | |
---|
2242 | // build extended pointer on cwd_lock and cwd_xp |
---|
2243 | ref_xp = process->ref_xp; |
---|
2244 | ref_ptr = GET_PTR( ref_xp ); |
---|
2245 | ref_cxy = GET_CXY( ref_xp ); |
---|
2246 | cwd_lock_xp = XPTR( ref_cxy , &ref_ptr->cwd_lock ); |
---|
2247 | cwd_xp_xp = XPTR( ref_cxy , &ref_ptr->cwd_xp ); |
---|
2248 | |
---|
2249 | // take lock protecting CWD changes |
---|
2250 | remote_busylock_acquire( cwd_lock_xp ); |
---|
2251 | |
---|
2252 | // update cwd_xp field in reference process descriptor |
---|
2253 | hal_remote_s64( cwd_xp_xp , inode_xp ); |
---|
2254 | |
---|
2255 | // release lock protecting CWD changes |
---|
2256 | remote_busylock_release( cwd_lock_xp ); |
---|
2257 | |
---|
2258 | #if DEBUG_VFS_CHDIR |
---|
2259 | if( DEBUG_VFS_CHDIR < cycle ) |
---|
2260 | printk("\n[%s] thread[%x,%x] set new cwd <%s> / inode_xp (%x,%x) / cycle %d\n", |
---|
2261 | __FUNCTION__, process->pid, this->trdid, path, inode_cxy, inode_ptr, cycle ); |
---|
2262 | #endif |
---|
2263 | |
---|
2264 | return 0; |
---|
2265 | |
---|
2266 | } // end vfs_chdir() |
---|
2267 | |
---|
2268 | /////////////////////////////////// |
---|
2269 | error_t vfs_chmod( xptr_t cwd_xp, |
---|
2270 | char * path, |
---|
2271 | uint32_t rights ) |
---|
2272 | { |
---|
2273 | error_t error; |
---|
2274 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
2275 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
2276 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
2277 | xptr_t main_lock_xp; // extended pointer on lock protecting Inode Tree |
---|
2278 | xptr_t inode_xp; // extended pointer on target inode |
---|
2279 | cxy_t inode_cxy; // inode cluster identifier |
---|
2280 | vfs_inode_t * inode_ptr; // inode local pointer |
---|
2281 | vfs_file_type_t inode_type; // inode type |
---|
2282 | |
---|
2283 | thread_t * this = CURRENT_THREAD; |
---|
2284 | process_t * process = this->process; |
---|
2285 | |
---|
2286 | #if DEBUG_VFS_CHMOD || DEBUG_VFS_ERROR |
---|
2287 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2288 | #endif |
---|
2289 | |
---|
2290 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
2291 | vfs_root_xp = process->vfs_root_xp; |
---|
2292 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
2293 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
2294 | main_lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
2295 | |
---|
2296 | // take lock protecting Inode Tree in read mode |
---|
2297 | remote_rwlock_rd_acquire( main_lock_xp ); |
---|
2298 | |
---|
2299 | // get extended pointer on target inode |
---|
2300 | error = vfs_lookup( cwd_xp, |
---|
2301 | path, |
---|
2302 | 0, |
---|
2303 | &inode_xp, |
---|
2304 | NULL ); |
---|
2305 | |
---|
2306 | // release lock protecting Inode Tree in read mode |
---|
2307 | remote_rwlock_rd_release( main_lock_xp ); |
---|
2308 | |
---|
2309 | if( error ) |
---|
2310 | { |
---|
2311 | |
---|
2312 | #if DEBUG_VFS_ERROR |
---|
2313 | printk("\n[ERROR] in %s : thread[%x,%x] cannot found inode <%s> / cycle %d\n", |
---|
2314 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2315 | #endif |
---|
2316 | return -1; |
---|
2317 | } |
---|
2318 | |
---|
2319 | // get inode cluster and local pointer |
---|
2320 | inode_cxy = GET_CXY( inode_xp ); |
---|
2321 | inode_ptr = GET_PTR( inode_xp ); |
---|
2322 | |
---|
2323 | // get inode type from remote inode |
---|
2324 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
2325 | |
---|
2326 | // TODO finalize implementation |
---|
2327 | |
---|
2328 | assert( __FUNCTION__, false , "not fully implemented" ); |
---|
2329 | |
---|
2330 | // set inode rights in remote inode |
---|
2331 | hal_remote_s32( XPTR( inode_cxy , &inode_ptr->rights ) , rights ); |
---|
2332 | |
---|
2333 | #if DEBUG_VFS_CHMOD |
---|
2334 | if( DEBUG_VFS_CHMOD < cycle ) |
---|
2335 | printk("\n[%s] thread[%x,%x] set access rights %x for <%s> / inode_xp (%x,%x) / cycle %d\n", |
---|
2336 | __FUNCTION__, process->pid, this->trdid, rights, path, inode_cxy, inode_ptr, cycle ); |
---|
2337 | #endif |
---|
2338 | |
---|
2339 | return 0; |
---|
2340 | |
---|
2341 | } // end vfs_chmod() |
---|
2342 | |
---|
2343 | ///////////////////////////////////// |
---|
2344 | error_t vfs_mkfifo( xptr_t root_xp, |
---|
2345 | char * path, |
---|
2346 | uint32_t mode ) |
---|
2347 | { |
---|
2348 | error_t error; |
---|
2349 | xptr_t parent_inode_xp; // extended pointer on parent inode in path |
---|
2350 | xptr_t fifo_dentry_xp; // extended pointer on created dentry |
---|
2351 | xptr_t fifo_inode_xp; // extended pointer on created inode |
---|
2352 | cxy_t fifo_cxy; // selected cluster for fifo inode |
---|
2353 | |
---|
2354 | char fifo_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2355 | |
---|
2356 | thread_t * this = CURRENT_THREAD; |
---|
2357 | process_t * process = this->process; |
---|
2358 | |
---|
2359 | #if DEBUG_VFS_MKFIFO || DEBUG_VFS_ERROR |
---|
2360 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2361 | #endif |
---|
2362 | |
---|
2363 | // build extended pointer on lock protecting Inode Tree |
---|
2364 | xptr_t vfs_root_xp = process->vfs_root_xp; |
---|
2365 | vfs_inode_t * vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
2366 | cxy_t vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
2367 | xptr_t vfs_lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
2368 | |
---|
2369 | // take the lock protecting the Inode-Tree in write mode |
---|
2370 | remote_rwlock_wr_acquire( vfs_lock_xp ); |
---|
2371 | |
---|
2372 | // 1. get extended pointer on parent inode and fifo name from vfs |
---|
2373 | error = vfs_lookup( root_xp, |
---|
2374 | path, |
---|
2375 | VFS_LOOKUP_PARENT, |
---|
2376 | &parent_inode_xp, |
---|
2377 | fifo_name ); |
---|
2378 | if( error ) |
---|
2379 | { |
---|
2380 | |
---|
2381 | #if DEBUG_VFS_ERROR |
---|
2382 | printk("\n[ERROR] in %s : thread[%x,%x] cannot found parent inode for <%s> / cycle %d\n", |
---|
2383 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2384 | #endif |
---|
2385 | remote_rwlock_wr_release( vfs_lock_xp ); |
---|
2386 | return -1; |
---|
2387 | } |
---|
2388 | |
---|
2389 | // get parent inode cluster and local pointer |
---|
2390 | cxy_t parent_cxy = GET_CXY( parent_inode_xp ); |
---|
2391 | vfs_inode_t * parent_ptr = GET_PTR( parent_inode_xp ); |
---|
2392 | |
---|
2393 | // 2. select a cluster for new fifo inode |
---|
2394 | fifo_cxy = cluster_random_select(); |
---|
2395 | |
---|
2396 | // get parent inode FS type |
---|
2397 | vfs_ctx_t * ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
2398 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) ); |
---|
2399 | |
---|
2400 | // 3. insert a new inode and dentry in Inode-Tree |
---|
2401 | error = vfs_add_child_in_parent( fifo_cxy, |
---|
2402 | fs_type, |
---|
2403 | parent_inode_xp, |
---|
2404 | fifo_name, |
---|
2405 | &fifo_dentry_xp, |
---|
2406 | &fifo_inode_xp ); |
---|
2407 | |
---|
2408 | // get fifo inode local pointer |
---|
2409 | vfs_inode_t * fifo_inode_ptr = GET_PTR( fifo_inode_xp ); |
---|
2410 | |
---|
2411 | if( error ) |
---|
2412 | { |
---|
2413 | |
---|
2414 | #if DEBUG_VFS_ERROR |
---|
2415 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create fifo inode for <%s> / cycle %d\n", |
---|
2416 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2417 | #endif |
---|
2418 | remote_rwlock_wr_release( vfs_lock_xp ); |
---|
2419 | return -1; |
---|
2420 | } |
---|
2421 | |
---|
2422 | // 4. allocate memory for a pipe descriptor, for the |
---|
2423 | // remote_buf_t descriptor, and for the associated data buffer |
---|
2424 | pipe_t * pipe = pipe_create( fifo_cxy, |
---|
2425 | CONFIG_PIPE_BUF_SIZE ); |
---|
2426 | if( pipe == NULL ) |
---|
2427 | { |
---|
2428 | |
---|
2429 | #if DEBUG_VFS_ERROR |
---|
2430 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create pipe for <%s> / cycle %d\n", |
---|
2431 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
2432 | #endif |
---|
2433 | vfs_remove_child_from_parent( fifo_dentry_xp ); |
---|
2434 | remote_rwlock_wr_release( vfs_lock_xp ); |
---|
2435 | return -1; |
---|
2436 | } |
---|
2437 | |
---|
2438 | // 5. update fifo_inode "type", "pipe", and "rights" fields |
---|
2439 | hal_remote_s32( XPTR( fifo_cxy , &fifo_inode_ptr->type ) , FILE_TYPE_FIFO ); |
---|
2440 | hal_remote_s32( XPTR( fifo_cxy , &fifo_inode_ptr->rights ) , mode ); |
---|
2441 | hal_remote_spt( XPTR( fifo_cxy , &fifo_inode_ptr->pipe ) , pipe ); |
---|
2442 | |
---|
2443 | // release the lock protecting the Inode-Tree from write mode |
---|
2444 | remote_rwlock_wr_release( vfs_lock_xp ); |
---|
2445 | |
---|
2446 | #if DEBUG_VFS_MKDIR |
---|
2447 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
2448 | printk("\n[%s] thread[%x,%x] creared fifo <%s> / inode_xp [%x,%x] / cycle %d\n", |
---|
2449 | __FUNCTION__, process->pid, this->trdid, path, fifo_cxy, fifo_inode_ptr, cycle ); |
---|
2450 | #endif |
---|
2451 | |
---|
2452 | return 0; |
---|
2453 | |
---|
2454 | } // end vfs_mkfifo() |
---|
2455 | |
---|
2456 | |
---|
2457 | |
---|
2458 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2459 | // Distributed Inode Tree access related functions |
---|
2460 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2461 | |
---|
2462 | ////////////////////////////////////////////////////////////////////////// |
---|
2463 | // This recursive function is called by the vfs_display() function. |
---|
2464 | // that is supposed to take the TXT0 lock. |
---|
2465 | ////////////////////////////////////////////////////////////////////////// |
---|
2466 | static void vfs_recursive_display( xptr_t inode_xp, |
---|
2467 | xptr_t name_xp, |
---|
2468 | uint32_t indent ) |
---|
2469 | { |
---|
2470 | cxy_t inode_cxy; |
---|
2471 | vfs_inode_t * inode_ptr; |
---|
2472 | vfs_file_type_t inode_type; |
---|
2473 | uint32_t inode_size; |
---|
2474 | uint32_t inode_attr; |
---|
2475 | void * inode_extd; |
---|
2476 | |
---|
2477 | xptr_t children_xp; // extended pointer on children xhtab |
---|
2478 | |
---|
2479 | xptr_t child_dentry_xp; |
---|
2480 | cxy_t child_dentry_cxy; |
---|
2481 | vfs_dentry_t * child_dentry_ptr; |
---|
2482 | xptr_t child_inode_xp; |
---|
2483 | xptr_t child_dentry_name_xp; |
---|
2484 | mapper_t * mapper_ptr; |
---|
2485 | |
---|
2486 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2487 | |
---|
2488 | char * indent_str[] = { "", // level 0 |
---|
2489 | " ", // level 1 |
---|
2490 | " ", // level 2 |
---|
2491 | " ", // level 3 |
---|
2492 | " ", // level 4 |
---|
2493 | " ", // level 5 |
---|
2494 | " ", // level 6 |
---|
2495 | " ", // level 7 |
---|
2496 | " ", // level 8 |
---|
2497 | " ", // level 9 |
---|
2498 | " ", // level 10 |
---|
2499 | " ", // level 11 |
---|
2500 | " ", // level 12 |
---|
2501 | " ", // level 13 |
---|
2502 | " ", // level 14 |
---|
2503 | " " }; // level 15 |
---|
2504 | |
---|
2505 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp cannot be NULL" ); |
---|
2506 | assert( __FUNCTION__, (name_xp != XPTR_NULL) , "name_xp cannot be NULL" ); |
---|
2507 | assert( __FUNCTION__, (indent < 16) , "depth cannot be larger than 15" ); |
---|
2508 | |
---|
2509 | // get current inode cluster and local pointer |
---|
2510 | inode_cxy = GET_CXY( inode_xp ); |
---|
2511 | inode_ptr = GET_PTR( inode_xp ); |
---|
2512 | |
---|
2513 | // get inode type, size, attr, mapper, and inum |
---|
2514 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
2515 | inode_size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
2516 | inode_attr = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->attr ) ); |
---|
2517 | inode_extd = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->extend ) ); |
---|
2518 | mapper_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
2519 | |
---|
2520 | // make a local copy of node name |
---|
2521 | hal_remote_strcpy( XPTR( local_cxy , name ) , name_xp ); |
---|
2522 | |
---|
2523 | // compute dirty |
---|
2524 | // inode_dirty = ((inode_attr & INODE_ATTR_DIRTY) != 0); unused [AG] dec 2019 |
---|
2525 | |
---|
2526 | // display inode |
---|
2527 | nolock_printk("%s<%s> : %s / extd %x / %d bytes / cxy %x / inode %x / mapper %x\n", |
---|
2528 | indent_str[indent], name, vfs_inode_type_str( inode_type ), (uint32_t)inode_extd, |
---|
2529 | inode_size, inode_cxy, inode_ptr, mapper_ptr ); |
---|
2530 | |
---|
2531 | // scan directory entries when current inode is a directory |
---|
2532 | // don't scan the the "." and ".." directories to break loops |
---|
2533 | if( (inode_type == FILE_TYPE_DIR) && |
---|
2534 | (strcmp( name , "." ) != 0) && |
---|
2535 | (strcmp( name , ".." ) != 0) ) |
---|
2536 | { |
---|
2537 | // get extended pointer on directory entries xhtab |
---|
2538 | children_xp = XPTR( inode_cxy , &inode_ptr->children ); |
---|
2539 | |
---|
2540 | // get xhtab lock |
---|
2541 | xhtab_lock( children_xp ); |
---|
2542 | |
---|
2543 | // get first dentry from xhtab |
---|
2544 | child_dentry_xp = xhtab_get_first( children_xp ); |
---|
2545 | |
---|
2546 | while( child_dentry_xp != XPTR_NULL ) |
---|
2547 | { |
---|
2548 | // get dentry cluster and local pointer |
---|
2549 | child_dentry_cxy = GET_CXY( child_dentry_xp ); |
---|
2550 | child_dentry_ptr = GET_PTR( child_dentry_xp ); |
---|
2551 | |
---|
2552 | // get extended pointer on child inode |
---|
2553 | child_inode_xp = hal_remote_l64( XPTR( child_dentry_cxy, |
---|
2554 | &child_dentry_ptr->child_xp ) ); |
---|
2555 | |
---|
2556 | // get extended pointer on dentry name |
---|
2557 | child_dentry_name_xp = XPTR( child_dentry_cxy , &child_dentry_ptr->name ); |
---|
2558 | |
---|
2559 | // recursive call on inode display |
---|
2560 | vfs_recursive_display( child_inode_xp, |
---|
2561 | child_dentry_name_xp, |
---|
2562 | indent+1 ); |
---|
2563 | |
---|
2564 | // get next dentry |
---|
2565 | child_dentry_xp = xhtab_get_next( children_xp ); |
---|
2566 | } |
---|
2567 | |
---|
2568 | // release xhtab lock |
---|
2569 | xhtab_unlock( children_xp ); |
---|
2570 | } |
---|
2571 | } // end vfs_recursive_display() |
---|
2572 | |
---|
2573 | /////////////////////////////////// |
---|
2574 | void vfs_display( xptr_t inode_xp ) |
---|
2575 | { |
---|
2576 | xptr_t name_xp; |
---|
2577 | xptr_t dentry_xp; |
---|
2578 | cxy_t dentry_cxy; |
---|
2579 | vfs_dentry_t * dentry_ptr; |
---|
2580 | xptr_t parents_root_xp; // root of parent dentries xlist |
---|
2581 | |
---|
2582 | // get target inode cluster and local pointer |
---|
2583 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
2584 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
2585 | |
---|
2586 | // build extended pointer on parents dentries root |
---|
2587 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
2588 | |
---|
2589 | // check VFS root |
---|
2590 | if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root |
---|
2591 | { |
---|
2592 | // build extended pointer on root name |
---|
2593 | name_xp = XPTR( local_cxy , "/" ); |
---|
2594 | } |
---|
2595 | else |
---|
2596 | { |
---|
2597 | // get first parent dentry cluster and pointers |
---|
2598 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
---|
2599 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
2600 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2601 | |
---|
2602 | // get extended pointer on dentry name |
---|
2603 | name_xp = XPTR( dentry_cxy , &dentry_ptr->name ); |
---|
2604 | } |
---|
2605 | |
---|
2606 | // get pointers on TXT0 chdev |
---|
2607 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
2608 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
2609 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
2610 | |
---|
2611 | // get extended pointer on remote TXT0 chdev lock |
---|
2612 | xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
2613 | |
---|
2614 | // get TXT0 lock in busy waiting mode |
---|
2615 | remote_busylock_acquire( lock_xp ); |
---|
2616 | |
---|
2617 | // print header |
---|
2618 | nolock_printk("\n***** current VFS state\n\n"); |
---|
2619 | |
---|
2620 | // call recursive function |
---|
2621 | vfs_recursive_display( inode_xp , name_xp , 0 ); |
---|
2622 | |
---|
2623 | // release lock |
---|
2624 | remote_busylock_release( lock_xp ); |
---|
2625 | |
---|
2626 | } // end vfs_display() |
---|
2627 | |
---|
2628 | /* |
---|
2629 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2630 | // This static function is used by the vfs_lookup() function. |
---|
2631 | // It takes an extended pointer on a remote inode (parent directory inode), |
---|
2632 | // and check access_rights violation for the calling thread. |
---|
2633 | // It can be used by any thread running in any cluster. |
---|
2634 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2635 | // @ inode_xp : extended pointer on inode. |
---|
2636 | // @ client_uid : client thread user ID |
---|
2637 | // @ client_gid : client thread group ID |
---|
2638 | // @ return true if access rights are violated. |
---|
2639 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2640 | static bool_t vfs_access_denied( xptr_t inode_xp, |
---|
2641 | uint32_t client_uid, |
---|
2642 | uint32_t client_gid ) |
---|
2643 | { |
---|
2644 | // get found inode cluster and local pointer |
---|
2645 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
2646 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
2647 | |
---|
2648 | // get inode access mode, UID, and GID |
---|
2649 | // TODO uint32_t mode = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->mode ) ); |
---|
2650 | uid_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) ); |
---|
2651 | gid_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) ); |
---|
2652 | |
---|
2653 | // TODO : me must use mode |
---|
2654 | if( (uid == client_uid) || (gid == client_gid) ) return false; |
---|
2655 | else return true; |
---|
2656 | } |
---|
2657 | */ |
---|
2658 | |
---|
2659 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2660 | // This static function is used by the vfs_lookup() function. |
---|
2661 | // It takes an extended pointer on a remote parent directory inode, a directory |
---|
2662 | // entry name, and and scan the XHTAB associated to the parent inode to find the |
---|
2663 | // searched dentry. It does NOT modify the inode tree in case of miss. |
---|
2664 | // It can be used by any thread running in any cluster. |
---|
2665 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2666 | // @ parent_xp : extended pointer on parent inode in remote cluster. |
---|
2667 | // @ name : dentry name |
---|
2668 | // @ child_xp : [out] buffer for extended pointer on child inode. |
---|
2669 | // @ return true if success / return false if not found. |
---|
2670 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2671 | static bool_t vfs_get_child( xptr_t parent_xp, |
---|
2672 | char * name, |
---|
2673 | xptr_t * child_xp ) |
---|
2674 | { |
---|
2675 | xptr_t xhtab_xp; // extended pointer on hash table for children dentries |
---|
2676 | xptr_t dentry_xp; // extended pointer on children dentry |
---|
2677 | cxy_t dentry_cxy; |
---|
2678 | vfs_dentry_t * dentry_ptr; |
---|
2679 | |
---|
2680 | // get parent inode cluster and local pointer |
---|
2681 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
2682 | vfs_inode_t * parent_ptr = GET_PTR( parent_xp ); |
---|
2683 | |
---|
2684 | // get extended pointer on hash table of children directory entries |
---|
2685 | xhtab_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
2686 | |
---|
2687 | // get pointers on matching dentry |
---|
2688 | dentry_xp = xhtab_lookup( xhtab_xp , name ); |
---|
2689 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
2690 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2691 | |
---|
2692 | if( dentry_xp == XPTR_NULL ) |
---|
2693 | { |
---|
2694 | return false; |
---|
2695 | } |
---|
2696 | else |
---|
2697 | { |
---|
2698 | *child_xp = (xptr_t)hal_remote_l64( XPTR( dentry_cxy , &dentry_ptr->child_xp ) ); |
---|
2699 | return true; |
---|
2700 | } |
---|
2701 | |
---|
2702 | } // end vfs_get_child() |
---|
2703 | |
---|
2704 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2705 | // This static function is used by the vfs_lookup() function. |
---|
2706 | // It takes the <current> pointer on a buffer containing a complete pathname, and return |
---|
2707 | // in the <name> buffer, allocated by the caller, a single name in the path. |
---|
2708 | // It return also in the <next> pointer the next character to analyse in the path. |
---|
2709 | // Finally it returns a <last> boolean, that is true when the returned <name> is the |
---|
2710 | // last name in the path. The names are supposed to be separated by one or several '/' |
---|
2711 | // characters, that are not written in the <name> buffer. |
---|
2712 | // |
---|
2713 | // WARNING: the leading characters '/' in the path are skiped before analysis. |
---|
2714 | // The path "/" identifies the VFS root, and is therefore anaysed as an empty |
---|
2715 | // string. This empty string is dignaled by the (-1) return value. |
---|
2716 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2717 | // @ current : pointer on first character to analyse in buffer containing the path. |
---|
2718 | // @ name : [out] pointer on buffer allocated by the caller for the returned name. |
---|
2719 | // @ next : [out] pointer on next character to analyse in buffer containing the path. |
---|
2720 | // @ last : [out] true if the returned name is the last (NUL character found). |
---|
2721 | // @ return 0 if success / return -1 if string empty (first chracter is NUL). |
---|
2722 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2723 | static error_t vfs_get_name_from_path( char * current, |
---|
2724 | char * name, |
---|
2725 | char ** next, |
---|
2726 | bool_t * last ) |
---|
2727 | { |
---|
2728 | char * ptr = current; |
---|
2729 | |
---|
2730 | // skip leading '/' characters |
---|
2731 | while( *ptr == '/' ) ptr++; |
---|
2732 | |
---|
2733 | // signal empty string |
---|
2734 | if( *ptr == 0 ) |
---|
2735 | { |
---|
2736 | *last = true; |
---|
2737 | return -1; |
---|
2738 | } |
---|
2739 | |
---|
2740 | // copy all characters in name until NUL or '/' |
---|
2741 | while( (*ptr != 0) && (*ptr !='/') ) *(name++) = *(ptr++); |
---|
2742 | |
---|
2743 | // set NUL terminating character in name buffer |
---|
2744 | *(name++) = 0; |
---|
2745 | |
---|
2746 | // return last an next |
---|
2747 | if( *ptr == 0 ) // last found character is NUL => last name in path |
---|
2748 | { |
---|
2749 | *last = true; |
---|
2750 | } |
---|
2751 | else // last found character is '/' => skip it |
---|
2752 | { |
---|
2753 | *last = false; |
---|
2754 | *next = ptr + 1; |
---|
2755 | } |
---|
2756 | |
---|
2757 | return 0; |
---|
2758 | |
---|
2759 | } // end vfs_get name_from_path() |
---|
2760 | |
---|
2761 | /////////////////////////////////////////////// |
---|
2762 | error_t vfs_lookup( xptr_t root_xp, |
---|
2763 | char * pathname, |
---|
2764 | uint32_t lookup_mode, |
---|
2765 | xptr_t * inode_xp, |
---|
2766 | char * last_name ) |
---|
2767 | { |
---|
2768 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // one name in path |
---|
2769 | |
---|
2770 | xptr_t parent_xp; // extended pointer on parent inode |
---|
2771 | cxy_t parent_cxy; // cluster for parent inode |
---|
2772 | vfs_inode_t * parent_ptr; // local pointer on parent inode |
---|
2773 | xptr_t dentry_xp; // extended pointer on dentry |
---|
2774 | vfs_dentry_t * dentry_ptr; // local pointer on dentry |
---|
2775 | xptr_t child_xp; // extended pointer on child inode |
---|
2776 | cxy_t child_cxy; // cluster for child inode |
---|
2777 | vfs_inode_t * child_ptr; // local pointer on child inode |
---|
2778 | vfs_fs_type_t fs_type; // File system type |
---|
2779 | vfs_ctx_t * ctx_ptr; // local pointer on FS context |
---|
2780 | char * current; // current pointer on path |
---|
2781 | char * next; // next value for current pointer |
---|
2782 | bool_t last; // true when the name is the last in path |
---|
2783 | bool_t found; // true when a child has been found |
---|
2784 | bool_t create; // searched inode must be created if not found |
---|
2785 | bool_t excl; // searched inode must not exist |
---|
2786 | bool_t parent; // searched inode is the parent |
---|
2787 | thread_t * this; // pointer on calling thread descriptor |
---|
2788 | process_t * process; // pointer on calling process descriptor |
---|
2789 | error_t error; |
---|
2790 | |
---|
2791 | this = CURRENT_THREAD; |
---|
2792 | process = this->process; |
---|
2793 | |
---|
2794 | // check pathname / root_xp consistency |
---|
2795 | assert( __FUNCTION__, ((pathname[0] != '/') || (root_xp == process->vfs_root_xp)), |
---|
2796 | "root inode must be VFS root for path <%s>", pathname ); |
---|
2797 | |
---|
2798 | #if DEBUG_VFS_LOOKUP || DEBUG_VFS_ERROR |
---|
2799 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2800 | #endif |
---|
2801 | |
---|
2802 | #if DEBUG_VFS_LOOKUP |
---|
2803 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2804 | vfs_inode_get_name( root_xp , root_name ); |
---|
2805 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2806 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / mode %x / cycle %d\n", |
---|
2807 | __FUNCTION__, process->pid, this->trdid, root_name, pathname, lookup_mode, cycle ); |
---|
2808 | #endif |
---|
2809 | |
---|
2810 | #if ( DEBUG_VFS_LOOKUP & 1 ) |
---|
2811 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2812 | vfs_display( root_xp ); |
---|
2813 | #endif |
---|
2814 | |
---|
2815 | // compute lookup flags |
---|
2816 | create = (lookup_mode & VFS_LOOKUP_CREATE) == VFS_LOOKUP_CREATE; |
---|
2817 | excl = (lookup_mode & VFS_LOOKUP_EXCL) == VFS_LOOKUP_EXCL; |
---|
2818 | parent = (lookup_mode & VFS_LOOKUP_PARENT) == VFS_LOOKUP_PARENT; |
---|
2819 | |
---|
2820 | // initialise loop variables |
---|
2821 | parent_xp = root_xp; |
---|
2822 | current = pathname; |
---|
2823 | next = NULL; |
---|
2824 | last = false; |
---|
2825 | child_xp = XPTR_NULL; |
---|
2826 | child_cxy = 0; |
---|
2827 | child_ptr = NULL; |
---|
2828 | |
---|
2829 | // loop on nodes in pathname |
---|
2830 | // load from device if one node in path not found in Inode Tree |
---|
2831 | // exit loop when last name found (i.e. last == true) |
---|
2832 | while( 1 ) |
---|
2833 | { |
---|
2834 | // get parent inode cluster and local pointer |
---|
2835 | parent_cxy = GET_CXY( parent_xp ); |
---|
2836 | parent_ptr = GET_PTR( parent_xp ); |
---|
2837 | |
---|
2838 | // get one "name" from path, and "last" flag |
---|
2839 | error = vfs_get_name_from_path( current , name , &next , &last ); |
---|
2840 | |
---|
2841 | // handle VFS root case |
---|
2842 | if ( error ) |
---|
2843 | { |
---|
2844 | |
---|
2845 | #if DEBUG_VFS_LOOKUP |
---|
2846 | cycle = (uint32_t)hal_get_cycles(); |
---|
2847 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2848 | printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n", |
---|
2849 | __FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle ); |
---|
2850 | #endif |
---|
2851 | *inode_xp = process->vfs_root_xp; |
---|
2852 | break; |
---|
2853 | } |
---|
2854 | |
---|
2855 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2856 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2857 | printk("\n[%s] thread[%x,%x] search <%s> in <%s> / last = %d\n", |
---|
2858 | __FUNCTION__, process->pid, this->trdid, name, pathname, last ); |
---|
2859 | #endif |
---|
2860 | |
---|
2861 | // search the child dentry matching name in parent inode XHTAB |
---|
2862 | found = vfs_get_child( parent_xp, |
---|
2863 | name, |
---|
2864 | &child_xp ); |
---|
2865 | |
---|
2866 | if( found == false ) // child not found in Inode Tree |
---|
2867 | { |
---|
2868 | // when a inode is not found in the Inode Tree: |
---|
2869 | // - if (last and parent) the Inode Tree is not modified |
---|
2870 | // - else we speculatively introduce a new (dentry/inode) in inode tree, |
---|
2871 | // and scan the parent directory mapper to initialise it. |
---|
2872 | // . if it is not found in the parent mapper: |
---|
2873 | // - if(last and create), a brand new file or directory is created |
---|
2874 | // - else, an error is reported |
---|
2875 | // . if it is found in parent mapper: |
---|
2876 | // - if( last and excl ), an error is reported |
---|
2877 | // - else the new child (inode & dentry) is initialised in Inode Tree |
---|
2878 | // - if the child is a directory, the child mapper is loaded from device |
---|
2879 | |
---|
2880 | if( last && parent ) // does nothing |
---|
2881 | { |
---|
2882 | |
---|
2883 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2884 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2885 | printk("\n[%s] thread[%x,%x] child not found but only parent requested in <%s>\n", |
---|
2886 | __FUNCTION__, process->pid, this->trdid, pathname ); |
---|
2887 | #endif |
---|
2888 | } |
---|
2889 | else // try to get it from parent mapper |
---|
2890 | { |
---|
2891 | |
---|
2892 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2893 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2894 | printk("\n[%s] thread[%x,%x] miss <%s> inode in Inode Tree => build from parent mapper\n", |
---|
2895 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
2896 | #endif |
---|
2897 | // get parent inode FS type |
---|
2898 | ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
2899 | fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) ); |
---|
2900 | |
---|
2901 | // select a cluster for new inode |
---|
2902 | child_cxy = cluster_random_select(); |
---|
2903 | |
---|
2904 | // insert a new child dentry/inode couple in inode tree |
---|
2905 | error = vfs_add_child_in_parent( child_cxy, |
---|
2906 | fs_type, |
---|
2907 | parent_xp, |
---|
2908 | name, |
---|
2909 | &dentry_xp, |
---|
2910 | &child_xp ); |
---|
2911 | if( error ) |
---|
2912 | { |
---|
2913 | |
---|
2914 | #if DEBUG_VFS_ERROR |
---|
2915 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create inode <%s> in path <%s> / cycle %d\n", |
---|
2916 | __FUNCTION__ , process->pid, this->trdid, name, pathname, cycle ); |
---|
2917 | #endif |
---|
2918 | return -1; |
---|
2919 | } |
---|
2920 | |
---|
2921 | // get child inode and dentry local pointers |
---|
2922 | child_ptr = GET_PTR( child_xp ); |
---|
2923 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2924 | |
---|
2925 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2926 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2927 | printk("\n[%s] thread[%x,%x] created dentry/inode <%s> in cluster %x\n", |
---|
2928 | __FUNCTION__, process->pid, this->trdid, name, child_cxy ); |
---|
2929 | #endif |
---|
2930 | // scan parent mapper to find the missing dentry, and complete |
---|
2931 | // the initialisation of dentry and child inode descriptors |
---|
2932 | error = vfs_fs_new_dentry_from_mapper( parent_xp, |
---|
2933 | dentry_ptr ); |
---|
2934 | |
---|
2935 | if ( error ) // an error can be fatal or non-fatal : |
---|
2936 | { |
---|
2937 | if ( last && create ) // add a brand new dentry in parent directory |
---|
2938 | { |
---|
2939 | error = vfs_fs_new_dentry_to_mapper( parent_xp, |
---|
2940 | dentry_ptr ); |
---|
2941 | if ( error ) |
---|
2942 | { |
---|
2943 | |
---|
2944 | #if DEBUG_VFS_ERROR |
---|
2945 | printk("\n[ERROR] in %s : thread[%x,%x] cannot add dentry <%s> in parent dir / cycle %d\n", |
---|
2946 | __FUNCTION__, process->pid, this->trdid, name, cycle ); |
---|
2947 | #endif |
---|
2948 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2949 | return -1; |
---|
2950 | } |
---|
2951 | |
---|
2952 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2953 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2954 | printk("\n[%s] thread[%x,%x] child <%s> not found in parent mapper => created it\n", |
---|
2955 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
2956 | #endif |
---|
2957 | } |
---|
2958 | else // not last or not create => error |
---|
2959 | { |
---|
2960 | |
---|
2961 | #if DEBUG_VFS_ERROR |
---|
2962 | printk("\n[ERROR] in %s : thread[%x,%x] cannot found node <%s> in parent for <%s> / cycle %d\n", |
---|
2963 | __FUNCTION__ , process->pid, this->trdid, name, pathname, cycle ); |
---|
2964 | #endif |
---|
2965 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2966 | return -1; |
---|
2967 | } |
---|
2968 | } |
---|
2969 | else // child has been found in parent mapper |
---|
2970 | { |
---|
2971 | // check the excl |
---|
2972 | if( last && create && excl ) |
---|
2973 | { |
---|
2974 | |
---|
2975 | #if DEBUG_VFS_ERROR |
---|
2976 | printk("\n[ERROR] in %s : thread[%x,%x] found an existing node <%s> / cycle %d\n", |
---|
2977 | __FUNCTION__ , process->pid, this->trdid, pathname, cycle ); |
---|
2978 | #endif |
---|
2979 | return -1; |
---|
2980 | } |
---|
2981 | |
---|
2982 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2983 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2984 | printk("\n[%s] thread[%x,%x] initialised inode <%s> from parent mapper\n", |
---|
2985 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
2986 | #endif |
---|
2987 | // load child mapper from device if child is a directory (prefetch) |
---|
2988 | uint32_t type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) ); |
---|
2989 | if( type == FILE_TYPE_DIR ) |
---|
2990 | { |
---|
2991 | error = vfs_inode_load_all_pages( child_xp ); |
---|
2992 | |
---|
2993 | if ( error ) |
---|
2994 | { |
---|
2995 | #if DEBUG_VFS_ERROR |
---|
2996 | printk("\n[ERROR] in %s : thread[%x,%x] cannot load <%s> from device / cycle %d\n", |
---|
2997 | __FUNCTION__ , process->pid, this->trdid, name, cycle ); |
---|
2998 | #endif |
---|
2999 | vfs_remove_child_from_parent( dentry_xp ); |
---|
3000 | return -1; |
---|
3001 | } |
---|
3002 | |
---|
3003 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
3004 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
3005 | printk("\n[%s] thread[%x,%x] loaded directory mapper for <%s> from IOC\n", |
---|
3006 | __FUNCTION__ , process->pid, this->trdid, name ); |
---|
3007 | #endif |
---|
3008 | } |
---|
3009 | } |
---|
3010 | } |
---|
3011 | } |
---|
3012 | else // child found in Inode Tree |
---|
3013 | { |
---|
3014 | // get child inode local pointer and cluster |
---|
3015 | child_ptr = GET_PTR( child_xp ); |
---|
3016 | child_cxy = GET_CXY( child_xp ); |
---|
3017 | |
---|
3018 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
3019 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
3020 | printk("\n[%s] thread[%x,%x] found <%s> in Inode Tree / inode (%x,%x)\n", |
---|
3021 | __FUNCTION__, process->pid, this->trdid, name, child_cxy, child_ptr ); |
---|
3022 | #endif |
---|
3023 | // check the excl flag |
---|
3024 | if( last && create && excl ) |
---|
3025 | { |
---|
3026 | |
---|
3027 | #if DEBUG_VFS_ERROR |
---|
3028 | printk("\n[ERROR] in %s : thread[%x,%x] found an existing node <%s> / cycle %d\n", |
---|
3029 | __FUNCTION__ , process->pid, this->trdid, pathname, cycle ); |
---|
3030 | #endif |
---|
3031 | return -1; |
---|
3032 | } |
---|
3033 | } |
---|
3034 | |
---|
3035 | // TODO check access rights here [AG] |
---|
3036 | // error = vfs_access_denied( child_xp, |
---|
3037 | // client_uid, |
---|
3038 | // client_gid ); |
---|
3039 | // if( error ) |
---|
3040 | // { |
---|
3041 | // #if DEBUG_VFS_ERROR |
---|
3042 | // if( DEBUG_VFS_ERROR < cycle ) |
---|
3043 | // printk("\n[ERROR] in %s : thread[%x,%x] / permission denied for <%s>\n", |
---|
3044 | // __FUNCTION__ , process->pid, this->trdid , pathname ); |
---|
3045 | // #endif |
---|
3046 | // |
---|
3047 | // return -1; |
---|
3048 | // } |
---|
3049 | |
---|
3050 | // exit when last |
---|
3051 | if ( last ) // last inode in path => return relevant info |
---|
3052 | { |
---|
3053 | if ( parent ) // return parent inode and child name |
---|
3054 | { |
---|
3055 | |
---|
3056 | #if DEBUG_VFS_LOOKUP |
---|
3057 | cycle = (uint32_t)hal_get_cycles(); |
---|
3058 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
3059 | printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n", |
---|
3060 | __FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle ); |
---|
3061 | #endif |
---|
3062 | *inode_xp = parent_xp; |
---|
3063 | strcpy( last_name , name ); |
---|
3064 | break; |
---|
3065 | } |
---|
3066 | else // return child inode name |
---|
3067 | { |
---|
3068 | |
---|
3069 | #if DEBUG_VFS_LOOKUP |
---|
3070 | cycle = (uint32_t)hal_get_cycles(); |
---|
3071 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
3072 | printk("\n[%s] thread[%x,%x] exit / child inode (%x,%x) / <%s> / cycle %d\n", |
---|
3073 | __FUNCTION__ , process->pid, this->trdid, child_cxy, child_ptr, pathname, cycle ); |
---|
3074 | #endif |
---|
3075 | *inode_xp = child_xp; |
---|
3076 | break; |
---|
3077 | } |
---|
3078 | } |
---|
3079 | else // not the last node in path => update loop variables |
---|
3080 | { |
---|
3081 | parent_xp = child_xp; |
---|
3082 | current = next; |
---|
3083 | } |
---|
3084 | } // end while loop on nodes in pathname |
---|
3085 | |
---|
3086 | #if ( DEBUG_VFS_LOOKUP & 1 ) |
---|
3087 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
3088 | vfs_display( root_xp ); |
---|
3089 | #endif |
---|
3090 | |
---|
3091 | return 0; |
---|
3092 | |
---|
3093 | } // end vfs_lookup() |
---|
3094 | |
---|
3095 | /////////////////////////////////////////////////// |
---|
3096 | error_t vfs_add_special_dentries( xptr_t child_xp, |
---|
3097 | xptr_t parent_xp ) |
---|
3098 | { |
---|
3099 | error_t error; |
---|
3100 | vfs_inode_t * child_ptr; // local pointer on child inode directory |
---|
3101 | cxy_t child_cxy; // child inode directory cluster identifier |
---|
3102 | vfs_ctx_t * ctx_ptr; // local pointer on child inode FS context |
---|
3103 | vfs_fs_type_t fs_type; // FS type of child inode |
---|
3104 | xptr_t dentry_xp; // extended pointer on dentry (used for . and ..) |
---|
3105 | vfs_dentry_t * dentry_ptr; // local pointer on dentry (used for . and ..) |
---|
3106 | xptr_t children_xhtab_xp; // extended pointer on inode "children" field |
---|
3107 | xptr_t children_entry_xp; // extended pointer on dentry "children" field |
---|
3108 | |
---|
3109 | #if DEBUG_VFS_ADD_SPECIAL || DEBUG_VFS_ERROR |
---|
3110 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
3111 | thread_t * this = CURRENT_THREAD; |
---|
3112 | process_t * process = this->process; |
---|
3113 | #endif |
---|
3114 | |
---|
3115 | #if DEBUG_VFS_ADD_SPECIAL |
---|
3116 | char child_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
3117 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
3118 | vfs_inode_get_name( child_xp , child_name ); |
---|
3119 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
3120 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3121 | printk("\n[%s] thread[%x,%x] enter for child <%s> in parent <%s> / cycle %d\n", |
---|
3122 | __FUNCTION__, process->pid, this->trdid, child_name, parent_name, cycle ); |
---|
3123 | #endif |
---|
3124 | |
---|
3125 | // get child directory cluster and local pointer |
---|
3126 | child_cxy = GET_CXY( child_xp ); |
---|
3127 | child_ptr = GET_PTR( child_xp ); |
---|
3128 | |
---|
3129 | // get child inode FS type |
---|
3130 | ctx_ptr = hal_remote_lpt( XPTR( child_cxy , &child_ptr->ctx ) ); |
---|
3131 | fs_type = hal_remote_l32( XPTR( child_cxy , &ctx_ptr->type ) ); |
---|
3132 | |
---|
3133 | //////////////////////////// create <.> dentry ////////////////////// |
---|
3134 | error = vfs_dentry_create( child_cxy, |
---|
3135 | fs_type, |
---|
3136 | ".", |
---|
3137 | &dentry_xp ); |
---|
3138 | if( error ) |
---|
3139 | { |
---|
3140 | |
---|
3141 | #if DEBUG_VFS_ERROR |
---|
3142 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create dentry <.> in cluster %x / cycle %d\n", |
---|
3143 | __FUNCTION__ , process->pid, this->trdid, child_cxy, cycle ); |
---|
3144 | #endif |
---|
3145 | return -1; |
---|
3146 | } |
---|
3147 | |
---|
3148 | // get <.> dentry local pointer |
---|
3149 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
3150 | |
---|
3151 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
3152 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3153 | printk("\n[%s] thread[%x,%x] created dentry <.> (%x,%x) / cycle %d\n", |
---|
3154 | __FUNCTION__, process->pid, this->trdid, child_cxy, dentry_ptr, cycle ); |
---|
3155 | #endif |
---|
3156 | |
---|
3157 | // register <.> dentry in child inode xhtab of children |
---|
3158 | children_xhtab_xp = XPTR( child_cxy , &child_ptr->children ); |
---|
3159 | children_entry_xp = XPTR( child_cxy , &dentry_ptr->children ); |
---|
3160 | |
---|
3161 | error = xhtab_insert( children_xhtab_xp , "." , children_entry_xp ); |
---|
3162 | |
---|
3163 | if( error ) |
---|
3164 | { |
---|
3165 | |
---|
3166 | #if DEBUG_VFS_ERROR |
---|
3167 | printk("\n[ERROR] in %s : thread[%x,%x] cannot register dentry <.> in xhtab / cycle %d\n", |
---|
3168 | __FUNCTION__ , process->pid, this->trdid, cycle ); |
---|
3169 | #endif |
---|
3170 | return -1; |
---|
3171 | } |
---|
3172 | |
---|
3173 | // update "parent" and "child_xp" fields in <.> dentry |
---|
3174 | hal_remote_s64( XPTR( child_cxy , &dentry_ptr->child_xp ) , child_xp ); |
---|
3175 | hal_remote_spt( XPTR( child_cxy , &dentry_ptr->parent ) , child_ptr ); |
---|
3176 | |
---|
3177 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
3178 | cycle = (uint32_t)hal_get_cycles(); |
---|
3179 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3180 | printk("\n[%s] thread[%x,%x] linked dentry <.> to parent and child inodes / cycle %d\n", |
---|
3181 | __FUNCTION__, process->pid, this->trdid, cycle ); |
---|
3182 | #endif |
---|
3183 | |
---|
3184 | // introduce <.> dentry into child directory mapper |
---|
3185 | // only if the target directory is not the root VFS |
---|
3186 | if( child_xp != parent_xp ) |
---|
3187 | { |
---|
3188 | error = vfs_fs_add_dentry( child_xp, |
---|
3189 | dentry_ptr ); |
---|
3190 | if( error ) |
---|
3191 | { |
---|
3192 | |
---|
3193 | #if DEBUG_VFS_ERROR |
---|
3194 | printk("\n[ERROR] in %s : thread[%x,%x] cannot register dentry <.> in mapper / cycle %d\n", |
---|
3195 | __FUNCTION__ , process->pid, this->trdid, cycle ); |
---|
3196 | #endif |
---|
3197 | return -1; |
---|
3198 | } |
---|
3199 | |
---|
3200 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
3201 | cycle = (uint32_t)hal_get_cycles(); |
---|
3202 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3203 | printk("\n[%s] thread[%x,%x] registered dentry <.> in child mapper / cycle %d\n", |
---|
3204 | __FUNCTION__, process->pid, this->trdid, cycle ); |
---|
3205 | #endif |
---|
3206 | |
---|
3207 | } |
---|
3208 | |
---|
3209 | ///////////////////////////// create <..> dentry /////////////////////// |
---|
3210 | error = vfs_dentry_create( child_cxy, |
---|
3211 | fs_type, |
---|
3212 | "..", |
---|
3213 | &dentry_xp ); |
---|
3214 | if( error ) |
---|
3215 | { |
---|
3216 | |
---|
3217 | #if DEBUG_VFS_ERROR |
---|
3218 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create dentry <..> in cluster %x / cycle %d\n", |
---|
3219 | __FUNCTION__ , process->pid, this->trdid, child_cxy, cycle ); |
---|
3220 | #endif |
---|
3221 | return -1; |
---|
3222 | } |
---|
3223 | |
---|
3224 | // get <..> dentry local pointer |
---|
3225 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
3226 | |
---|
3227 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
3228 | cycle = (uint32_t)hal_get_cycles(); |
---|
3229 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3230 | printk("\n[%s] thread[%x,%x] created dentry <..> (%x,%x) / cycle %d\n", |
---|
3231 | __FUNCTION__, process->pid, this->trdid, child_cxy, dentry_ptr, cycle ); |
---|
3232 | #endif |
---|
3233 | |
---|
3234 | // register <..> dentry in child_inode xhtab of children |
---|
3235 | children_xhtab_xp = XPTR( child_cxy , &child_ptr->children ); |
---|
3236 | children_entry_xp = XPTR( child_cxy , &dentry_ptr->children ); |
---|
3237 | |
---|
3238 | error = xhtab_insert( children_xhtab_xp , ".." , children_entry_xp ); |
---|
3239 | |
---|
3240 | if( error ) |
---|
3241 | { |
---|
3242 | |
---|
3243 | #if DEBUG_VFS_ERROR |
---|
3244 | printk("\n[ERROR] in %s : thread[%x,%x] cannot register dentry <..> in xhtab / cycle %d\n", |
---|
3245 | __FUNCTION__ , process->pid, this->trdid, cycle ); |
---|
3246 | #endif |
---|
3247 | return -1; |
---|
3248 | } |
---|
3249 | |
---|
3250 | // don't register <..> dentry in parent_inode xlist of parents |
---|
3251 | |
---|
3252 | // update "parent" and "child_xp" fields in <..> dentry |
---|
3253 | hal_remote_s64( XPTR( child_cxy , &dentry_ptr->child_xp ) , parent_xp ); |
---|
3254 | hal_remote_spt( XPTR( child_cxy , &dentry_ptr->parent ) , child_ptr ); |
---|
3255 | |
---|
3256 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
3257 | cycle = (uint32_t)hal_get_cycles(); |
---|
3258 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3259 | printk("\n[%s] thread[%x,%x] linked dentry <..> to parent and child inodes / cycle %d\n", |
---|
3260 | __FUNCTION__, process->pid, this->trdid, cycle ); |
---|
3261 | #endif |
---|
3262 | |
---|
3263 | // introduce <..> dentry into child directory mapper |
---|
3264 | // only if the target directory is not the root VFS |
---|
3265 | if( child_xp != parent_xp ) |
---|
3266 | { |
---|
3267 | error = vfs_fs_add_dentry( child_xp, |
---|
3268 | dentry_ptr ); |
---|
3269 | if( error ) |
---|
3270 | { |
---|
3271 | |
---|
3272 | #if DEBUG_VFS_ERROR |
---|
3273 | printk("\n[ERROR] in %s : thread[%x,%x] cannot register dentry <..> in mapper / cycle %d\n", |
---|
3274 | __FUNCTION__ , process->pid, this->trdid, cycle ); |
---|
3275 | #endif |
---|
3276 | return -1; |
---|
3277 | } |
---|
3278 | |
---|
3279 | #if(DEBUG_VFS_ADD_SPECIAL & 1) |
---|
3280 | cycle = (uint32_t)hal_get_cycles(); |
---|
3281 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3282 | printk("\n[%s] thread[%x,%x] registered dentry <..> in child mapper / cycle %d\n", |
---|
3283 | __FUNCTION__, process->pid, this->trdid, cycle ); |
---|
3284 | #endif |
---|
3285 | |
---|
3286 | } |
---|
3287 | |
---|
3288 | #if DEBUG_VFS_ADD_SPECIAL |
---|
3289 | cycle = (uint32_t)hal_get_cycles(); |
---|
3290 | if( DEBUG_VFS_ADD_SPECIAL < cycle ) |
---|
3291 | printk("\n[%s] thread[%x,%x] exit for child <%s> in parent <%s> / cycle %d\n", |
---|
3292 | __FUNCTION__, process->pid, this->trdid, child_name, parent_name, cycle ); |
---|
3293 | #endif |
---|
3294 | |
---|
3295 | return 0; |
---|
3296 | |
---|
3297 | } // end vfs_add_special_dentries() |
---|
3298 | |
---|
3299 | ////////////////////////////////////////// |
---|
3300 | error_t vfs_get_path( xptr_t inode_xp, |
---|
3301 | char * buffer, |
---|
3302 | char ** first, |
---|
3303 | uint32_t max_size ) |
---|
3304 | { |
---|
3305 | xptr_t dentry_xp; // extended pointer on current dentry |
---|
3306 | vfs_dentry_t * dentry_ptr; // local pointer on current dentry |
---|
3307 | cxy_t dentry_cxy; // current dentry cluster identifier |
---|
3308 | xptr_t name_xp; // extended pointer on current dentry name |
---|
3309 | uint32_t length; // length of current dentry name |
---|
3310 | int32_t index; // slot index in buffer |
---|
3311 | xptr_t current_xp; // extended pointer on current inode |
---|
3312 | vfs_inode_t * current_ptr; // local pointer on current inode |
---|
3313 | cxy_t current_cxy; // current inode cluster identifier |
---|
3314 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
3315 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
3316 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
3317 | xptr_t lock_xp; // extended pointer on Inode Tree lock |
---|
3318 | xptr_t parents_root_xp; // extended pointer on current inode parents root |
---|
3319 | bool_t found; // condition to exit the while loop |
---|
3320 | |
---|
3321 | thread_t * this = CURRENT_THREAD; |
---|
3322 | process_t * process = this->process; |
---|
3323 | |
---|
3324 | #if DEBUG_VFS_GET_PATH |
---|
3325 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
3326 | #endif |
---|
3327 | |
---|
3328 | #if DEBUG_VFS_GET_PATH |
---|
3329 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
3330 | printk("\n[%s] thread[%x,%x] enter : inode (%x,%x) / cycle %d\n", |
---|
3331 | __FUNCTION__ , process->pid, this->trdid, |
---|
3332 | GET_CXY( inode_xp ), GET_PTR( inode_xp ), cycle ); |
---|
3333 | #endif |
---|
3334 | |
---|
3335 | // set the NUL character in buffer / initialise buffer index |
---|
3336 | buffer[max_size - 1] = 0; |
---|
3337 | index = (int32_t)(max_size - 1); |
---|
3338 | |
---|
3339 | // initialize current inode |
---|
3340 | current_xp = inode_xp; |
---|
3341 | |
---|
3342 | // build extended pointer on lock protecting Inode Tree |
---|
3343 | vfs_root_xp = process->vfs_root_xp; |
---|
3344 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
3345 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
3346 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
3347 | |
---|
3348 | // take lock protecting Inode Tree in read mode |
---|
3349 | remote_rwlock_rd_acquire( lock_xp ); |
---|
3350 | |
---|
3351 | // traverse Inode Tree from target inode to VFS root |
---|
3352 | // selecting always the first parent dentry |
---|
3353 | // the buffer is written in "reverse order" (from target inode to root) |
---|
3354 | // exit the while loop when the VFS root has been found |
---|
3355 | do |
---|
3356 | { |
---|
3357 | // get current inode cluster and local pointer |
---|
3358 | current_cxy = GET_CXY( current_xp ); |
---|
3359 | current_ptr = GET_PTR( current_xp ); |
---|
3360 | |
---|
3361 | // build extended pointer on parents dentries root |
---|
3362 | parents_root_xp = XPTR( current_cxy , ¤t_ptr->parents ); |
---|
3363 | |
---|
3364 | // compute exit condition <=> current inode is VFS root |
---|
3365 | found = xlist_is_empty( parents_root_xp ); |
---|
3366 | |
---|
3367 | if( found ) // parent is the VFS root |
---|
3368 | { |
---|
3369 | if( index == (int32_t)(max_size - 1) ) |
---|
3370 | { |
---|
3371 | // update index |
---|
3372 | index--; |
---|
3373 | |
---|
3374 | // set separator |
---|
3375 | buffer[index] = '/'; |
---|
3376 | |
---|
3377 | // check buffer overflow |
---|
3378 | assert( __FUNCTION__, (index >= 0) , "kernel buffer too small" ); |
---|
3379 | |
---|
3380 | } |
---|
3381 | } |
---|
3382 | else // not the VFS root |
---|
3383 | { |
---|
3384 | // get first parent dentry cluster and pointers |
---|
3385 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
---|
3386 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
3387 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
3388 | |
---|
3389 | // get extended pointer on dentry name and name length |
---|
3390 | name_xp = XPTR( dentry_cxy , dentry_ptr->name ); |
---|
3391 | length = hal_remote_l32( XPTR( dentry_cxy , &dentry_ptr->length ) ); |
---|
3392 | |
---|
3393 | #if (DEBUG_VFS_GET_PATH & 1) |
---|
3394 | char debug_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
3395 | hal_remote_strcpy( XPTR( local_cxy , debug_name ) , name_xp ); |
---|
3396 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
3397 | printk("\n[%s] thread(%x,%s) get current dentry <%s> in cluster %x\n", |
---|
3398 | __FUNCTION__ , process->pid, this->trdid, debug_name, current_cxy ); |
---|
3399 | #endif |
---|
3400 | // update index |
---|
3401 | index -= (length + 1); |
---|
3402 | |
---|
3403 | // check buffer overflow |
---|
3404 | assert( __FUNCTION__, (index >= 0) , "kernel buffer too small" ); |
---|
3405 | |
---|
3406 | // update pathname |
---|
3407 | hal_remote_memcpy( XPTR( local_cxy , &buffer[index + 1] ) , |
---|
3408 | name_xp , length ); |
---|
3409 | |
---|
3410 | // set separator |
---|
3411 | buffer[index] = '/'; |
---|
3412 | |
---|
3413 | // get extended pointer on parent inode |
---|
3414 | current_xp = XPTR( dentry_cxy , |
---|
3415 | hal_remote_lpt( XPTR( dentry_cxy , &dentry_ptr->parent ) ) ); |
---|
3416 | } |
---|
3417 | } |
---|
3418 | while( found == false ); |
---|
3419 | |
---|
3420 | // release lock protecting Inode Tree in read mode |
---|
3421 | remote_rwlock_rd_release( lock_xp ); |
---|
3422 | |
---|
3423 | #if DEBUG_VFS_GET_PATH |
---|
3424 | cycle = (uint32_t)hal_get_cycles(); |
---|
3425 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
3426 | printk("\n[%s] thread[%x,%x] exit : path <%s> / cycle %d\n", |
---|
3427 | __FUNCTION__ , process->pid, this->trdid, &buffer[index], cycle ); |
---|
3428 | #endif |
---|
3429 | |
---|
3430 | // return pointer on first character in buffer |
---|
3431 | *first = &buffer[index]; |
---|
3432 | return 0; |
---|
3433 | |
---|
3434 | } // end vfs_get_path() |
---|
3435 | |
---|
3436 | |
---|
3437 | ////////////////////////////////////////////////////////////// |
---|
3438 | error_t vfs_add_child_in_parent( cxy_t child_cxy, |
---|
3439 | vfs_fs_type_t fs_type, |
---|
3440 | xptr_t parent_inode_xp, |
---|
3441 | char * name, |
---|
3442 | xptr_t * child_dentry_xp, |
---|
3443 | xptr_t * child_inode_xp ) |
---|
3444 | { |
---|
3445 | error_t error; |
---|
3446 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
3447 | vfs_inode_t * parent_inode_ptr; // parent inode local pointer |
---|
3448 | xptr_t new_dentry_xp; // extended pointer on created dentry |
---|
3449 | vfs_dentry_t * new_dentry_ptr; // created dentry local pointer |
---|
3450 | xptr_t new_inode_xp; // extended pointer on created child inode |
---|
3451 | vfs_inode_t * new_inode_ptr; // local pointer on created child inode |
---|
3452 | |
---|
3453 | xptr_t parents_root_xp; // extended pointer on child inode "parents" field |
---|
3454 | xptr_t parents_entry_xp; // extended pointer on child dentry "parents" field |
---|
3455 | xptr_t children_xhtab_xp; // extended pointer on parent inode "children" field |
---|
3456 | xptr_t children_entry_xp; // extended pointer on child dentry "children" field |
---|
3457 | |
---|
3458 | // get parent inode cluster and pointer |
---|
3459 | parent_cxy = GET_CXY( parent_inode_xp ); |
---|
3460 | parent_inode_ptr = GET_PTR( parent_inode_xp ); |
---|
3461 | |
---|
3462 | #if DEBUG_VFS_ADD_CHILD || DEBUG_VFS_ERROR |
---|
3463 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
3464 | thread_t * this = CURRENT_THREAD; |
---|
3465 | #endif |
---|
3466 | |
---|
3467 | #if DEBUG_VFS_ADD_CHILD |
---|
3468 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
3469 | vfs_inode_get_name( parent_inode_xp , parent_name ); |
---|
3470 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
3471 | printk("\n[%s] thread[%x,%x] enter / child <%s> / parent <%s> / cycle %d\n", |
---|
3472 | __FUNCTION__, this->process->pid, this->trdid, name, |
---|
3473 | parent_name, (uint32_t)hal_get_cycles() ); |
---|
3474 | #endif |
---|
3475 | |
---|
3476 | // 1. create dentry in parent cluster |
---|
3477 | error = vfs_dentry_create( parent_cxy, |
---|
3478 | fs_type, |
---|
3479 | name, |
---|
3480 | &new_dentry_xp ); |
---|
3481 | if( error ) |
---|
3482 | { |
---|
3483 | |
---|
3484 | #if DEBUG_VFS_ERROR |
---|
3485 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create dentry <%s> in cluster %x / cycle %d\n", |
---|
3486 | __FUNCTION__ , this->process->pid, this->trdid , name , parent_cxy, cycle ); |
---|
3487 | #endif |
---|
3488 | return -1; |
---|
3489 | } |
---|
3490 | |
---|
3491 | // get dentry local pointer |
---|
3492 | new_dentry_ptr = GET_PTR( new_dentry_xp ); |
---|
3493 | |
---|
3494 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
3495 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
3496 | printk("\n[%s] thread[%x,%x] created dentry <%s> : (%x,%x)\n", |
---|
3497 | __FUNCTION__, this->process->pid, this->trdid, name, parent_cxy, new_dentry_ptr ); |
---|
3498 | #endif |
---|
3499 | |
---|
3500 | // 2. create child inode in child cluster |
---|
3501 | // TODO : define attr / mode / uid / gid |
---|
3502 | uint32_t attr = 0; |
---|
3503 | uint32_t mode = 0; |
---|
3504 | uint32_t uid = 0; |
---|
3505 | uint32_t gid = 0; |
---|
3506 | |
---|
3507 | error = vfs_inode_create( child_cxy, |
---|
3508 | fs_type, |
---|
3509 | attr, |
---|
3510 | mode, |
---|
3511 | uid, |
---|
3512 | gid, |
---|
3513 | &new_inode_xp ); |
---|
3514 | if( error ) |
---|
3515 | { |
---|
3516 | |
---|
3517 | #if DEBUG_VFS_ERROR |
---|
3518 | printk("\n[ERROR] in %s : thread[%x,%x] cannot create inode in cluster %x / cycle %d\n", |
---|
3519 | __FUNCTION__ , this->process->pid , this->trdid , child_cxy, cycle ); |
---|
3520 | #endif |
---|
3521 | |
---|
3522 | vfs_dentry_destroy( new_dentry_xp ); |
---|
3523 | return -1; |
---|
3524 | } |
---|
3525 | |
---|
3526 | // get new inode local pointer |
---|
3527 | new_inode_ptr = GET_PTR( new_inode_xp ); |
---|
3528 | |
---|
3529 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
3530 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
3531 | printk("\n[%s] thread[%x,%x] created inode <%s> : (%x,%x)\n", |
---|
3532 | __FUNCTION__ , this->process->pid, this->trdid, name , child_cxy, new_inode_ptr ); |
---|
3533 | #endif |
---|
3534 | |
---|
3535 | // 3. register new_dentry in new_inode xlist of parents |
---|
3536 | parents_root_xp = XPTR( child_cxy , &new_inode_ptr->parents ); |
---|
3537 | parents_entry_xp = XPTR( parent_cxy, &new_dentry_ptr->parents ); |
---|
3538 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
3539 | hal_remote_atomic_add( XPTR( child_cxy , &new_inode_ptr->links ) , 1 ); |
---|
3540 | |
---|
3541 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
3542 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
3543 | printk("\n[%s] thread[%x,%x] linked dentry(%x,%x) to child inode(%x,%x)\n", |
---|
3544 | __FUNCTION__, this->process->pid, this->trdid, |
---|
3545 | parent_cxy, new_dentry_ptr, child_cxy, new_inode_ptr ); |
---|
3546 | #endif |
---|
3547 | |
---|
3548 | // 4. register new_dentry in parent_inode xhtab of children |
---|
3549 | children_xhtab_xp = XPTR( parent_cxy , &parent_inode_ptr->children ); |
---|
3550 | children_entry_xp = XPTR( parent_cxy , &new_dentry_ptr->children ); |
---|
3551 | xhtab_insert( children_xhtab_xp , name , children_entry_xp ); |
---|
3552 | |
---|
3553 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
3554 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
3555 | printk("\n[%s] thread[%x,%x] linked dentry(%x,%x) to parent inode(%x,%x)\n", |
---|
3556 | __FUNCTION__, this->process->pid, this->trdid, |
---|
3557 | parent_cxy, new_dentry_ptr, parent_cxy, parent_inode_ptr ); |
---|
3558 | #endif |
---|
3559 | |
---|
3560 | // 5. update "parent" and "child_xp" fields in new_dentry |
---|
3561 | hal_remote_s64( XPTR( parent_cxy , &new_dentry_ptr->child_xp ) , new_inode_xp ); |
---|
3562 | hal_remote_spt( XPTR( parent_cxy , &new_dentry_ptr->parent ) , parent_inode_ptr ); |
---|
3563 | |
---|
3564 | #if DEBUG_VFS_ADD_CHILD |
---|
3565 | cycle = (uint32_t)hal_get_cycles(); |
---|
3566 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
3567 | printk("\n[%s] thread[%x,%x] exit for <%s> / cycle %d\n", |
---|
3568 | __FUNCTION__, this->process->pid, this->trdid, name, cycle ); |
---|
3569 | #endif |
---|
3570 | |
---|
3571 | // return extended pointer on dentry & child inode |
---|
3572 | *child_dentry_xp = new_dentry_xp; |
---|
3573 | *child_inode_xp = new_inode_xp; |
---|
3574 | return 0; |
---|
3575 | |
---|
3576 | } // end vfs_add_child_in_parent() |
---|
3577 | |
---|
3578 | ///////////////////////////////////////////////////// |
---|
3579 | void vfs_remove_child_from_parent( xptr_t dentry_xp ) |
---|
3580 | { |
---|
3581 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
3582 | cxy_t child_cxy; // child inode cluster identifier |
---|
3583 | vfs_dentry_t * dentry_ptr; // local pointer on dentry |
---|
3584 | xptr_t child_inode_xp; // extended pointer on child inode |
---|
3585 | vfs_inode_t * child_inode_ptr; // local pointer on child inode |
---|
3586 | vfs_inode_t * parent_inode_ptr; // local pointer on parent inode |
---|
3587 | uint32_t links; // number of child inode parents |
---|
3588 | error_t error; |
---|
3589 | |
---|
3590 | #if DEBUG_VFS_REMOVE_CHILD |
---|
3591 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
3592 | #endif |
---|
3593 | |
---|
3594 | char dentry_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
3595 | |
---|
3596 | thread_t * this = CURRENT_THREAD; |
---|
3597 | |
---|
3598 | // get parent cluster and dentry local pointer |
---|
3599 | parent_cxy = GET_CXY( dentry_xp ); |
---|
3600 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
3601 | |
---|
3602 | // get a local copy of dentry name |
---|
3603 | hal_remote_strcpy( XPTR( local_cxy , dentry_name ), |
---|
3604 | XPTR( parent_cxy , &dentry_ptr->name ) ); |
---|
3605 | |
---|
3606 | // get parent_inode local pointer |
---|
3607 | parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy , &dentry_ptr->parent ) ); |
---|
3608 | |
---|
3609 | // get child cluster and child_inode pointers |
---|
3610 | child_inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) ); |
---|
3611 | child_cxy = GET_CXY( child_inode_xp ); |
---|
3612 | child_inode_ptr = GET_PTR( child_inode_xp ); |
---|
3613 | |
---|
3614 | #if DEBUG_VFS_REMOVE_CHILD |
---|
3615 | printk("\n[%s] thread[%x,%x] enter for dentry[%x,%x] / inode[%x,%x] / cycle %d\n", |
---|
3616 | __FUNCTION__, this->process->pid, this->trdid, |
---|
3617 | parent_cxy, dentry_ptr, child_cxy, child_inode_ptr, cycle ); |
---|
3618 | #endif |
---|
3619 | |
---|
3620 | // remove dentry from parent_inode |
---|
3621 | error = xhtab_remove( XPTR( parent_cxy , &parent_inode_ptr->children ), |
---|
3622 | dentry_name, |
---|
3623 | XPTR( parent_cxy , &dentry_ptr->children ) ); |
---|
3624 | |
---|
3625 | if( error ) |
---|
3626 | { |
---|
3627 | printk("\n[WARNING] in %s : thread[%x,%x] cannot remove dentry <%s> from parent\n", |
---|
3628 | __FUNCTION__ , this->process->pid , this->trdid , dentry_name ); |
---|
3629 | } |
---|
3630 | |
---|
3631 | #if(DEBUG_VFS_REMOVE_CHILD & 1) |
---|
3632 | if( DEBUG_VFS_REMOVE_CHILD < cycle ) |
---|
3633 | printk("\n[%s] thread[%x,%x] removed dentry from parent inode\n", |
---|
3634 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
3635 | #endif |
---|
3636 | |
---|
3637 | // remove dentry from child_inode |
---|
3638 | xlist_unlink( XPTR( parent_cxy , &dentry_ptr->parents ) ); |
---|
3639 | |
---|
3640 | // get and update number of parents dentries |
---|
3641 | links = hal_remote_atomic_add( XPTR( child_cxy , &child_inode_ptr->links ) , -1 ); |
---|
3642 | |
---|
3643 | #if(DEBUG_VFS_REMOVE_CHILD & 1) |
---|
3644 | if( DEBUG_VFS_REMOVE_CHILD < cycle ) |
---|
3645 | printk("\n[%s] thread[%x,%x] removed dentry from child inode\n", |
---|
3646 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
3647 | #endif |
---|
3648 | |
---|
3649 | // delete dentry descriptor |
---|
3650 | vfs_dentry_destroy( dentry_xp ); |
---|
3651 | |
---|
3652 | #if DEBUG_VFS_REMOVE_CHILD |
---|
3653 | cycle = (uint32_t)hal_get_cycles(); |
---|
3654 | if( DEBUG_VFS_REMOVE_CHILD < cycle ) |
---|
3655 | printk("\n[%s] thread[%x,%x] deleted dentry descriptor / cycle %d\n", |
---|
3656 | __FUNCTION__, this->process->pid, this->trdid, cycle ); |
---|
3657 | #endif |
---|
3658 | |
---|
3659 | // delete child_inode descriptor if last link |
---|
3660 | if( links == 1 ) |
---|
3661 | { |
---|
3662 | vfs_inode_destroy( child_inode_xp ); |
---|
3663 | |
---|
3664 | #if DEBUG_VFS_REMOVE_CHILD |
---|
3665 | cycle = (uint32_t)hal_get_cycles(); |
---|
3666 | if( DEBUG_VFS_REMOVE_CHILD < cycle ) |
---|
3667 | printk("\n[%s] thread[%x,%x] deleted child inode descriptor / cycle %d\n", |
---|
3668 | __FUNCTION__, this->process->pid, this->trdid, cycle ); |
---|
3669 | #endif |
---|
3670 | |
---|
3671 | } |
---|
3672 | } // end vfs_remove_child_from_parent() |
---|
3673 | |
---|
3674 | |
---|
3675 | |
---|
3676 | |
---|
3677 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
3678 | // API used by VFS to access a specific FS |
---|
3679 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
3680 | |
---|
3681 | /////////////////////////////////////////////////// |
---|
3682 | error_t vfs_fs_add_dentry( xptr_t inode_xp, |
---|
3683 | vfs_dentry_t * dentry_ptr ) |
---|
3684 | { |
---|
3685 | error_t error = 0; |
---|
3686 | |
---|
3687 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL" ); |
---|
3688 | assert( __FUNCTION__, (dentry_ptr != NULL ) , "dentry_ptr argument is NULL" ); |
---|
3689 | |
---|
3690 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3691 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3692 | |
---|
3693 | // get inode mapper |
---|
3694 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3695 | |
---|
3696 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
3697 | |
---|
3698 | // get FS type |
---|
3699 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
3700 | |
---|
3701 | // call relevant FS function |
---|
3702 | if( fs_type == FS_TYPE_FATFS ) |
---|
3703 | { |
---|
3704 | error = fatfs_add_dentry( inode_xp , dentry_ptr ); |
---|
3705 | } |
---|
3706 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3707 | { |
---|
3708 | error = 0; // does nothing for RAMFS |
---|
3709 | } |
---|
3710 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3711 | { |
---|
3712 | error = 0; // does nothing for DEVFS |
---|
3713 | } |
---|
3714 | else |
---|
3715 | { |
---|
3716 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3717 | } |
---|
3718 | |
---|
3719 | return error; |
---|
3720 | |
---|
3721 | } // end vfs_fs_add_dentry() |
---|
3722 | |
---|
3723 | ////////////////////////////////////////////////////// |
---|
3724 | error_t vfs_fs_remove_dentry( xptr_t inode_xp, |
---|
3725 | vfs_dentry_t * dentry_ptr ) |
---|
3726 | { |
---|
3727 | error_t error = 0; |
---|
3728 | |
---|
3729 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL" ); |
---|
3730 | assert( __FUNCTION__, (dentry_ptr != NULL ) , "dentry_ptr argument is NULL" ); |
---|
3731 | |
---|
3732 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3733 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3734 | |
---|
3735 | // get inode mapper |
---|
3736 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3737 | |
---|
3738 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
3739 | |
---|
3740 | // get FS type |
---|
3741 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
3742 | |
---|
3743 | // call relevant FS function |
---|
3744 | if( fs_type == FS_TYPE_FATFS ) |
---|
3745 | { |
---|
3746 | error = fatfs_remove_dentry( inode_xp , dentry_ptr ); |
---|
3747 | |
---|
3748 | } |
---|
3749 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3750 | { |
---|
3751 | error = 0; // does nothing for RAMFS |
---|
3752 | } |
---|
3753 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3754 | { |
---|
3755 | error = 0; // does nothing for DEVFS |
---|
3756 | } |
---|
3757 | else |
---|
3758 | { |
---|
3759 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3760 | } |
---|
3761 | |
---|
3762 | return error; |
---|
3763 | |
---|
3764 | } // end vfs_fs_remove_dentry() |
---|
3765 | |
---|
3766 | /////////////////////////////////////////////////////////////// |
---|
3767 | error_t vfs_fs_new_dentry_from_mapper( xptr_t inode_xp, |
---|
3768 | vfs_dentry_t * dentry_ptr ) |
---|
3769 | { |
---|
3770 | error_t error = 0; |
---|
3771 | |
---|
3772 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL" ); |
---|
3773 | assert( __FUNCTION__, (dentry_ptr != NULL ) , "dentry_ptr argument is NULL" ); |
---|
3774 | |
---|
3775 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3776 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3777 | |
---|
3778 | // get inode mapper |
---|
3779 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3780 | |
---|
3781 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
3782 | |
---|
3783 | // get FS type |
---|
3784 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
3785 | |
---|
3786 | // call relevant FS function |
---|
3787 | if( fs_type == FS_TYPE_FATFS ) |
---|
3788 | { |
---|
3789 | error = fatfs_new_dentry_from_mapper( inode_xp , dentry_ptr ); |
---|
3790 | } |
---|
3791 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3792 | { |
---|
3793 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
3794 | } |
---|
3795 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3796 | { |
---|
3797 | assert( __FUNCTION__, false , "should not be called for DEVFS" ); |
---|
3798 | } |
---|
3799 | else |
---|
3800 | { |
---|
3801 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3802 | } |
---|
3803 | |
---|
3804 | return error; |
---|
3805 | |
---|
3806 | } // end vfs_fs_new_dentry_from_mapper() |
---|
3807 | |
---|
3808 | /////////////////////////////////////////////////////////////// |
---|
3809 | error_t vfs_fs_new_dentry_to_mapper( xptr_t inode_xp, |
---|
3810 | vfs_dentry_t * dentry_ptr ) |
---|
3811 | { |
---|
3812 | error_t error = 0; |
---|
3813 | |
---|
3814 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL" ); |
---|
3815 | assert( __FUNCTION__, (dentry_ptr != NULL ) , "dentry_ptr argument is NULL" ); |
---|
3816 | |
---|
3817 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3818 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3819 | |
---|
3820 | // get inode mapper |
---|
3821 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3822 | |
---|
3823 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
3824 | |
---|
3825 | // get FS type |
---|
3826 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
3827 | |
---|
3828 | // call relevant FS function |
---|
3829 | if( fs_type == FS_TYPE_FATFS ) |
---|
3830 | { |
---|
3831 | error = fatfs_new_dentry_to_mapper( inode_xp , dentry_ptr ); |
---|
3832 | } |
---|
3833 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3834 | { |
---|
3835 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
3836 | } |
---|
3837 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3838 | { |
---|
3839 | assert( __FUNCTION__, false , "should not be called for DEVFS" ); |
---|
3840 | } |
---|
3841 | else |
---|
3842 | { |
---|
3843 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3844 | } |
---|
3845 | |
---|
3846 | return error; |
---|
3847 | |
---|
3848 | } // end vfs_fs_new_dentry_to_mapper() |
---|
3849 | |
---|
3850 | ////////////////////////////////////////////////////// |
---|
3851 | error_t vfs_fs_update_dentry( xptr_t inode_xp, |
---|
3852 | vfs_dentry_t * dentry_ptr ) |
---|
3853 | { |
---|
3854 | error_t error = 0; |
---|
3855 | |
---|
3856 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL" ); |
---|
3857 | assert( __FUNCTION__, (dentry_ptr != NULL ) , "dentry_ptr argument is NULL" ); |
---|
3858 | |
---|
3859 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3860 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3861 | |
---|
3862 | // get inode mapper |
---|
3863 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3864 | |
---|
3865 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
3866 | |
---|
3867 | // get FS type |
---|
3868 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
3869 | |
---|
3870 | // call relevant FS function |
---|
3871 | if( fs_type == FS_TYPE_FATFS ) |
---|
3872 | { |
---|
3873 | error = fatfs_update_dentry( inode_xp , dentry_ptr ); |
---|
3874 | } |
---|
3875 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3876 | { |
---|
3877 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
3878 | } |
---|
3879 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3880 | { |
---|
3881 | assert( __FUNCTION__, false , "should not be called for DEVFS" ); |
---|
3882 | } |
---|
3883 | else |
---|
3884 | { |
---|
3885 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3886 | } |
---|
3887 | |
---|
3888 | return error; |
---|
3889 | |
---|
3890 | } // end vfs_fs_update_dentry() |
---|
3891 | |
---|
3892 | /////////////////////////////////////////////////// |
---|
3893 | error_t vfs_fs_get_user_dir( vfs_inode_t * inode, |
---|
3894 | struct dirent * array, |
---|
3895 | uint32_t max_dirent, |
---|
3896 | uint32_t min_dentry, |
---|
3897 | bool_t detailed, |
---|
3898 | uint32_t * entries, |
---|
3899 | bool_t * done ) |
---|
3900 | { |
---|
3901 | error_t error = 0; |
---|
3902 | |
---|
3903 | // check arguments |
---|
3904 | assert( __FUNCTION__, (inode != NULL) , "parent pointer is NULL"); |
---|
3905 | assert( __FUNCTION__, (array != NULL) , "child pointer is NULL"); |
---|
3906 | assert( __FUNCTION__, (detailed == false) , "detailed argument not supported\n"); |
---|
3907 | assert( __FUNCTION__, (inode->type == FILE_TYPE_DIR), "inode is not a directory\n"); |
---|
3908 | |
---|
3909 | // get parent inode FS type |
---|
3910 | vfs_fs_type_t fs_type = inode->ctx->type; |
---|
3911 | |
---|
3912 | // call relevant FS function |
---|
3913 | if( fs_type == FS_TYPE_FATFS ) |
---|
3914 | { |
---|
3915 | error = fatfs_get_user_dir( inode, |
---|
3916 | array, |
---|
3917 | max_dirent, |
---|
3918 | min_dentry, |
---|
3919 | detailed, |
---|
3920 | entries, |
---|
3921 | done ); |
---|
3922 | } |
---|
3923 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3924 | { |
---|
3925 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
3926 | } |
---|
3927 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3928 | { |
---|
3929 | error = devfs_get_user_dir( inode, |
---|
3930 | array, |
---|
3931 | max_dirent, |
---|
3932 | min_dentry, |
---|
3933 | detailed, |
---|
3934 | entries, |
---|
3935 | done ); |
---|
3936 | } |
---|
3937 | else |
---|
3938 | { |
---|
3939 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3940 | } |
---|
3941 | |
---|
3942 | return error; |
---|
3943 | |
---|
3944 | } // end vfs_fs_get_user_dir() |
---|
3945 | |
---|
3946 | ///////////////////////////////////////////// |
---|
3947 | error_t vfs_fs_sync_inode( xptr_t inode_xp ) |
---|
3948 | { |
---|
3949 | error_t error = 0; |
---|
3950 | |
---|
3951 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL"); |
---|
3952 | |
---|
3953 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3954 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3955 | |
---|
3956 | // get inode mapper |
---|
3957 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3958 | |
---|
3959 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
3960 | |
---|
3961 | // get FS type |
---|
3962 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
3963 | |
---|
3964 | // call relevant FS function |
---|
3965 | if( fs_type == FS_TYPE_FATFS ) |
---|
3966 | { |
---|
3967 | error = fatfs_sync_inode( inode_xp ); |
---|
3968 | } |
---|
3969 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3970 | { |
---|
3971 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
3972 | } |
---|
3973 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3974 | { |
---|
3975 | assert( __FUNCTION__, false , "should not be called for DEVFS" ); |
---|
3976 | } |
---|
3977 | else |
---|
3978 | { |
---|
3979 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
3980 | } |
---|
3981 | |
---|
3982 | return error; |
---|
3983 | |
---|
3984 | } // end vfs_fs_sync_inode() |
---|
3985 | |
---|
3986 | //////////////////////////////////////////////// |
---|
3987 | error_t vfs_fs_sync_fat( vfs_fs_type_t fs_type ) |
---|
3988 | { |
---|
3989 | error_t error = 0; |
---|
3990 | |
---|
3991 | // call relevant FS function |
---|
3992 | if( fs_type == FS_TYPE_FATFS ) |
---|
3993 | { |
---|
3994 | error = fatfs_sync_fat(); |
---|
3995 | } |
---|
3996 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3997 | { |
---|
3998 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
3999 | } |
---|
4000 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
4001 | { |
---|
4002 | assert( __FUNCTION__, false , "should not be called for DEVFS" ); |
---|
4003 | } |
---|
4004 | else |
---|
4005 | { |
---|
4006 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
4007 | } |
---|
4008 | |
---|
4009 | return error; |
---|
4010 | |
---|
4011 | } // end vfs_fs_sync_fat() |
---|
4012 | |
---|
4013 | //////////////////////////////////////////////// |
---|
4014 | error_t vfs_fs_release_inode( xptr_t inode_xp ) |
---|
4015 | { |
---|
4016 | error_t error = 0; |
---|
4017 | |
---|
4018 | assert( __FUNCTION__, (inode_xp != XPTR_NULL) , "inode_xp argument is NULL"); |
---|
4019 | |
---|
4020 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
4021 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
4022 | |
---|
4023 | // get local pointer on mapper |
---|
4024 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
4025 | |
---|
4026 | assert( __FUNCTION__, (mapper != NULL) , "mapper pointer is NULL"); |
---|
4027 | |
---|
4028 | // get FS type from mapper |
---|
4029 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->fs_type ) ); |
---|
4030 | |
---|
4031 | // call relevant FS function |
---|
4032 | if( fs_type == FS_TYPE_FATFS ) |
---|
4033 | { |
---|
4034 | error = fatfs_release_inode( inode_xp ); |
---|
4035 | } |
---|
4036 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
4037 | { |
---|
4038 | assert( __FUNCTION__, false , "should not be called for RAMFS" ); |
---|
4039 | } |
---|
4040 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
4041 | { |
---|
4042 | assert( __FUNCTION__, false , "should not be called for DEVFS" ); |
---|
4043 | } |
---|
4044 | else |
---|
4045 | { |
---|
4046 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
4047 | } |
---|
4048 | |
---|
4049 | return error; |
---|
4050 | |
---|
4051 | } // end vfs_fs_release_inode() |
---|
4052 | |
---|
4053 | ////////////////////////////////////////////////// |
---|
4054 | error_t vfs_fs_move_page( xptr_t page_xp, |
---|
4055 | ioc_cmd_type_t cmd_type ) |
---|
4056 | { |
---|
4057 | error_t error = 0; |
---|
4058 | |
---|
4059 | assert( __FUNCTION__, (page_xp != XPTR_NULL) , "page pointer is NULL" ); |
---|
4060 | |
---|
4061 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
4062 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
4063 | |
---|
4064 | // get local pointer on mapper |
---|
4065 | mapper_t * mapper = hal_remote_lpt( XPTR( page_cxy , &page_ptr->mapper ) ); |
---|
4066 | |
---|
4067 | assert( __FUNCTION__, (mapper != NULL) , "no mapper for page" ); |
---|
4068 | |
---|
4069 | // get FS type |
---|
4070 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( page_cxy , &mapper->fs_type ) ); |
---|
4071 | |
---|
4072 | // call relevant FS function |
---|
4073 | if( fs_type == FS_TYPE_FATFS ) |
---|
4074 | { |
---|
4075 | error = fatfs_move_page( page_xp , cmd_type ); |
---|
4076 | } |
---|
4077 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
4078 | { |
---|
4079 | assert( __FUNCTION__, false , "should not be called for RAMFS\n" ); |
---|
4080 | } |
---|
4081 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
4082 | { |
---|
4083 | assert( __FUNCTION__, false , "should not be called for DEVFS\n" ); |
---|
4084 | } |
---|
4085 | else |
---|
4086 | { |
---|
4087 | assert( __FUNCTION__, false , "undefined file system type" ); |
---|
4088 | } |
---|
4089 | |
---|
4090 | return error; |
---|
4091 | |
---|
4092 | } // end vfs_fs_move_page() |
---|
4093 | |
---|
4094 | |
---|