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 (2015) |
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5 | * Alain Greiner (2016,2017,2018) |
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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 | |
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26 | #include <kernel_config.h> |
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27 | #include <hal_kernel_types.h> |
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28 | #include <hal_atomic.h> |
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29 | #include <hal_special.h> |
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30 | #include <printk.h> |
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31 | #include <list.h> |
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32 | #include <xlist.h> |
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33 | #include <slist.h> |
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34 | #include <xhtab.h> |
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35 | #include <string.h> |
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36 | #include <rpc.h> |
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37 | #include <errno.h> |
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38 | #include <kmem.h> |
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39 | #include <mapper.h> |
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40 | #include <thread.h> |
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41 | #include <chdev.h> |
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42 | #include <process.h> |
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43 | #include <cluster.h> |
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44 | #include <vfs.h> |
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45 | #include <fatfs.h> |
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46 | #include <ramfs.h> |
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47 | #include <devfs.h> |
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48 | #include <syscalls.h> |
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49 | |
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50 | |
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51 | ////////////////////////////////////////////////////////////////////////////////////////// |
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52 | // Extern variables |
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53 | ////////////////////////////////////////////////////////////////////////////////////////// |
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54 | |
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55 | extern vfs_ctx_t fs_context[FS_TYPES_NR]; // allocated in kernel_init.c |
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56 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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57 | extern char * lock_type_str[]; // allocated in kernel_init.c |
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58 | |
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59 | /////////////////////////////////////////////////////////////////////////////////////////// |
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60 | // VFS Context related functions |
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61 | ////////////////////////////////////////////////////////////////////////////////////////// |
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62 | |
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63 | //////////////////////////////////////// |
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64 | void vfs_ctx_init( vfs_fs_type_t type, |
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65 | uint32_t attr, |
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66 | uint32_t total_clusters, |
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67 | uint32_t cluster_size, |
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68 | xptr_t vfs_root_xp, |
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69 | void * extend ) |
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70 | { |
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71 | vfs_ctx_t * vfs_ctx = &fs_context[type]; |
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72 | |
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73 | vfs_ctx->type = type; |
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74 | vfs_ctx->attr = attr; |
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75 | vfs_ctx->total_clusters = total_clusters; |
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76 | vfs_ctx->cluster_size = cluster_size; |
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77 | vfs_ctx->vfs_root_xp = vfs_root_xp; |
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78 | vfs_ctx->extend = extend; |
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79 | |
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80 | busylock_init( &vfs_ctx->lock , LOCK_VFS_CTX ); |
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81 | |
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82 | bitmap_init( vfs_ctx->bitmap , BITMAP_SIZE(CONFIG_VFS_MAX_INODES) ); |
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83 | } |
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84 | |
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85 | //////////////////////////////////////////// |
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86 | error_t vfs_ctx_inum_alloc( vfs_ctx_t * ctx, |
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87 | uint32_t * inum ) |
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88 | { |
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89 | // get lock on inum allocator |
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90 | busylock_acquire( &ctx->lock ); |
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91 | |
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92 | // get lid from local inum allocator |
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93 | uint32_t lid = bitmap_ffc( ctx->bitmap , CONFIG_VFS_MAX_INODES ); |
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94 | |
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95 | if( lid == 0xFFFFFFFF ) // no more free slot => error |
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96 | { |
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97 | // release lock |
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98 | busylock_release( &ctx->lock ); |
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99 | |
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100 | // return error |
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101 | return 1; |
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102 | } |
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103 | else // found => return inum |
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104 | { |
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105 | // set slot allocated |
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106 | bitmap_set( ctx->bitmap , lid ); |
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107 | |
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108 | // release lock |
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109 | busylock_release( &ctx->lock ); |
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110 | |
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111 | // return inum |
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112 | *inum = (((uint32_t)local_cxy) << 16) | (lid & 0xFFFF); |
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113 | return 0; |
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114 | } |
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115 | } |
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116 | |
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117 | //////////////////////////////////////////// |
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118 | void vfs_ctx_inum_release( vfs_ctx_t * ctx, |
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119 | uint32_t inum ) |
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120 | { |
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121 | bitmap_clear( ctx->bitmap , inum & 0xFFFF ); |
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122 | } |
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123 | |
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124 | ////////////////////////////////////////////////////////////////////////////////////////// |
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125 | // VFS inode descriptor related functions |
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126 | ////////////////////////////////////////////////////////////////////////////////////////// |
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127 | |
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128 | const char * vfs_inode_type_str( vfs_inode_type_t type ) |
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129 | { |
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130 | switch ( type ) |
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131 | { |
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132 | case INODE_TYPE_FILE: return "FILE"; |
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133 | case INODE_TYPE_DIR: return "DIR "; |
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134 | case INODE_TYPE_FIFO: return "FIFO"; |
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135 | case INODE_TYPE_PIPE: return "PIPE"; |
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136 | case INODE_TYPE_SOCK: return "SOCK"; |
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137 | case INODE_TYPE_DEV: return "DEV "; |
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138 | case INODE_TYPE_SYML: return "SYML"; |
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139 | default: return "undefined"; |
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140 | } |
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141 | } |
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142 | |
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143 | //////////////////////////////////////////////////// |
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144 | error_t vfs_inode_create( vfs_fs_type_t fs_type, |
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145 | vfs_inode_type_t inode_type, |
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146 | uint32_t attr, |
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147 | uint32_t rights, |
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148 | uid_t uid, |
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149 | gid_t gid, |
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150 | xptr_t * inode_xp ) |
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151 | { |
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152 | mapper_t * mapper; // associated mapper( to be allocated) |
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153 | vfs_inode_t * inode; // inode descriptor (to be allocated) |
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154 | uint32_t inum; // inode identifier (to be allocated) |
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155 | vfs_ctx_t * ctx; // file system context |
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156 | kmem_req_t req; // request to kernel memory allocator |
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157 | error_t error; |
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158 | |
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159 | #if DEBUG_VFS_INODE_CREATE |
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160 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
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161 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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162 | cxy_t dentry_cxy = GET_CXY( dentry_xp ); |
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163 | vfs_dentry_t * dentry_ptr = GET_PTR( dentry_xp ); |
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164 | thread_t * this = CURRENT_THREAD; |
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165 | if( dentry_xp != XPTR_NULL ) hal_remote_strcpy( XPTR( local_cxy , name ), |
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166 | XPTR( dentry_cxy , dentry_ptr->name ) ); |
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167 | else strcpy( name , "/" ); |
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168 | if( DEBUG_VFS_INODE_CREATE < cycle ) |
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169 | printk("\n[%s] thread[%x,%x] enter for <%s> / cycle %d\n", |
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170 | __FUNCTION__, this->process->pid, this->trdid, name, cycle ); |
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171 | #endif |
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172 | |
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173 | // check fs type and get pointer on context |
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174 | if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS]; |
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175 | else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS]; |
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176 | else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS]; |
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177 | else |
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178 | { |
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179 | ctx = NULL; |
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180 | assert( false , "illegal file system type = %d\n" , fs_type ); |
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181 | } |
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182 | |
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183 | // allocate inum |
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184 | error = vfs_ctx_inum_alloc( ctx , &inum ); |
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185 | |
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186 | if( error ) |
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187 | { |
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188 | printk("\n[ERROR] in %s : cannot allocate inum\n", __FUNCTION__ ); |
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189 | return ENOMEM; |
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190 | } |
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191 | |
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192 | // allocate memory for mapper |
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193 | mapper = mapper_create( fs_type ); |
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194 | |
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195 | if( mapper == NULL ) |
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196 | { |
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197 | printk("\n[ERROR] in %s : cannot allocate mapper\n", __FUNCTION__ ); |
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198 | vfs_ctx_inum_release( ctx , inum ); |
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199 | return ENOMEM; |
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200 | } |
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201 | |
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202 | // allocate memory for VFS inode descriptor |
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203 | req.type = KMEM_VFS_INODE; |
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204 | req.size = sizeof(vfs_inode_t); |
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205 | req.flags = AF_KERNEL | AF_ZERO; |
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206 | inode = (vfs_inode_t *)kmem_alloc( &req ); |
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207 | |
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208 | if( inode == NULL ) |
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209 | { |
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210 | printk("\n[ERROR] in %s : cannot allocate inode descriptor\n", __FUNCTION__ ); |
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211 | vfs_ctx_inum_release( ctx , inum ); |
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212 | mapper_destroy( mapper ); |
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213 | return -1; |
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214 | } |
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215 | |
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216 | // initialize inode descriptor |
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217 | inode->type = inode_type; |
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218 | inode->inum = inum; |
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219 | inode->attr = attr; |
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220 | inode->rights = rights; |
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221 | inode->uid = uid; |
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222 | inode->gid = gid; |
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223 | inode->ctx = ctx; |
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224 | inode->mapper = mapper; |
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225 | inode->extend = NULL; |
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226 | inode->links = 0; |
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227 | |
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228 | // initialise inode field in mapper |
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229 | mapper->inode = inode; |
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230 | |
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231 | // initialise threads waiting queue |
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232 | // xlist_root_init( XPTR( local_cxy , &inode->wait_root ) ); |
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233 | |
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234 | // initialize chidren dentries xhtab |
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235 | xhtab_init( &inode->children , XHTAB_DENTRY_TYPE ); |
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236 | |
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237 | // initialize parents dentries xlist |
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238 | xlist_root_init( XPTR( local_cxy , &inode->parents ) ); |
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239 | |
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240 | // initialize lock protecting size |
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241 | remote_rwlock_init( XPTR( local_cxy , &inode->size_lock ), LOCK_VFS_SIZE ); |
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242 | |
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243 | // initialise lock protecting inode tree traversal |
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244 | remote_rwlock_init( XPTR( local_cxy , &inode->main_lock ), LOCK_VFS_MAIN ); |
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245 | |
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246 | // return extended pointer on inode |
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247 | *inode_xp = XPTR( local_cxy , inode ); |
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248 | |
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249 | #if DEBUG_VFS_INODE_CREATE |
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250 | cycle = (uint32_t)hal_get_cycles(); |
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251 | if( DEBUG_VFS_INODE_CREATE < cycle ) |
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252 | printk("\n[%s] thread[%x,%x] exit for <%s> / inode [%x,%x] / cycle %d\n", |
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253 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, inode, cycle ); |
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254 | #endif |
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255 | |
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256 | return 0; |
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257 | |
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258 | } // end vfs_inode_create() |
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259 | |
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260 | ///////////////////////////////////////////// |
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261 | void vfs_inode_destroy( vfs_inode_t * inode ) |
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262 | { |
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263 | // release memory allocated for mapper |
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264 | mapper_destroy( inode->mapper ); |
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265 | |
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266 | // release memory allocate for inode descriptor |
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267 | kmem_req_t req; |
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268 | req.ptr = inode; |
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269 | req.type = KMEM_VFS_INODE; |
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270 | kmem_free( &req ); |
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271 | |
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272 | } // end vfs_inode_destroy() |
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273 | |
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274 | ////////////////////////////////////////////// |
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275 | uint32_t vfs_inode_get_size( xptr_t inode_xp ) |
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276 | { |
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277 | // get inode cluster and local pointer |
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278 | cxy_t cxy = GET_CXY( inode_xp ); |
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279 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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280 | |
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281 | // get size |
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282 | remote_rwlock_rd_acquire( XPTR( cxy , &ptr->size_lock ) ); |
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283 | uint32_t size = hal_remote_l32( XPTR( cxy , &ptr->size ) ); |
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284 | remote_rwlock_rd_release( XPTR( cxy , &ptr->size_lock ) ); |
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285 | return size; |
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286 | } |
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287 | |
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288 | //////////////////////////////////////////// |
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289 | void vfs_inode_set_size( xptr_t inode_xp, |
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290 | uint32_t size ) |
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291 | { |
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292 | // get inode cluster and local pointer |
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293 | cxy_t cxy = GET_CXY( inode_xp ); |
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294 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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295 | |
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296 | // set size |
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297 | remote_rwlock_wr_release( XPTR( cxy , &ptr->size_lock ) ); |
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298 | hal_remote_s32( XPTR( cxy , &ptr->size ) , size ); |
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299 | remote_rwlock_wr_release( XPTR( cxy , &ptr->size_lock ) ); |
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300 | } |
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301 | |
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302 | //////////////////////////////////////// |
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303 | void vfs_inode_unlock( xptr_t inode_xp ) |
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304 | { |
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305 | // get inode cluster and local pointer |
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306 | cxy_t cxy = GET_CXY( inode_xp ); |
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307 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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308 | |
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309 | // release the main lock |
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310 | remote_busylock_release( XPTR( cxy , &ptr->main_lock ) ); |
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311 | } |
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312 | |
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313 | ////////////////////////////////////// |
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314 | void vfs_inode_lock( xptr_t inode_xp ) |
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315 | { |
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316 | // get inode cluster and local pointer |
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317 | cxy_t cxy = GET_CXY( inode_xp ); |
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318 | vfs_inode_t * ptr = GET_PTR( inode_xp ); |
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319 | |
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320 | // get the main lock |
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321 | remote_busylock_acquire( XPTR( cxy , &ptr->main_lock ) ); |
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322 | } |
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323 | |
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324 | /////////////////////////////////////////// |
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325 | void vfs_inode_get_name( xptr_t inode_xp, |
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326 | char * name ) |
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327 | { |
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328 | cxy_t inode_cxy; // inode cluster identifier |
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329 | vfs_inode_t * inode_ptr; // local pointer on inode |
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330 | xptr_t parents_root_xp; // extended pointer on inode parents root |
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331 | |
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332 | // get inode cluster and local pointer |
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333 | inode_cxy = GET_CXY( inode_xp ); |
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334 | inode_ptr = GET_PTR( inode_xp ); |
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335 | |
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336 | // build extended pointer on parents dentries root |
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337 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
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338 | |
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339 | // check VFS root |
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340 | if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root |
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341 | { |
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342 | strcpy( name , "/" ); |
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343 | } |
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344 | else // not the VFS root |
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345 | { |
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346 | xptr_t dentry_xp; |
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347 | cxy_t dentry_cxy; |
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348 | vfs_dentry_t * dentry_ptr; |
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349 | |
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350 | // get first name in list of parents |
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351 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
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352 | dentry_cxy = GET_CXY( dentry_xp ); |
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353 | dentry_ptr = GET_PTR( dentry_xp ); |
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354 | |
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355 | hal_remote_strcpy( XPTR( local_cxy , name ) , |
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356 | XPTR( dentry_cxy , dentry_ptr->name ) ); |
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357 | } |
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358 | |
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359 | } // end vfs_inode_get_name() |
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360 | |
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361 | /////////////////////////////////////////////////////// |
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362 | error_t vfs_inode_load_all_pages( vfs_inode_t * inode ) |
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363 | { |
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364 | |
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365 | assert( (inode != NULL) , "inode pointer is NULL\n" ); |
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366 | |
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367 | uint32_t page_id; |
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368 | xptr_t page_xp; |
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369 | |
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370 | mapper_t * mapper = inode->mapper; |
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371 | uint32_t size = inode->size; |
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372 | |
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373 | assert( (mapper != NULL) , "mapper pointer is NULL\n" ); |
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374 | |
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375 | #if DEBUG_VFS_INODE_LOAD_ALL |
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376 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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377 | thread_t * this = CURRENT_THREAD; |
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378 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
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379 | vfs_inode_get_name( XPTR( local_cxy , inode ) , name ); |
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380 | if( DEBUG_VFS_INODE_LOAD_ALL < cycle ) |
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381 | printk("\n[%s] thread[%x,%x] enter for <%s> in cluster %x / cycle %d\n", |
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382 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle ); |
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383 | #endif |
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384 | |
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385 | // compute number of pages |
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386 | uint32_t npages = size >> CONFIG_PPM_PAGE_SHIFT; |
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387 | if( (size & CONFIG_PPM_PAGE_MASK) || (size == 0) ) npages++; |
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388 | |
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389 | // loop on pages |
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390 | for( page_id = 0 ; page_id < npages ; page_id ++ ) |
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391 | { |
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392 | // If the mage is missing, this function allocates the missing page, |
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393 | // and load the page from IOC device into mapper |
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394 | page_xp = mapper_remote_get_page( XPTR( local_cxy , mapper ), page_id ); |
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395 | |
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396 | if( page_xp == XPTR_NULL ) return -1; |
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397 | } |
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398 | |
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399 | #if DEBUG_VFS_INODE_LOAD_ALL |
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400 | cycle = (uint32_t)hal_get_cycles(); |
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401 | if( DEBUG_VFS_INODE_LOAD_ALL < cycle ) |
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402 | printk("\n[%s] thread[%x,%x] exit for <%x> in cluster %x / cycle %d\n", |
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403 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle ); |
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404 | #endif |
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405 | |
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406 | return 0; |
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407 | |
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408 | } // end vfs_inode_load_all_pages() |
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409 | |
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410 | //////////////////////////////////////////////////////////////////////////////////////////// |
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411 | // VFS dentry descriptor related functions |
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412 | ////////////////////////////////////////////////////////////////////////////////////////// |
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413 | |
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414 | /////////////////////////////////////////////////// |
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415 | error_t vfs_dentry_create( vfs_fs_type_t fs_type, |
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416 | char * name, |
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417 | xptr_t * dentry_xp ) |
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418 | { |
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419 | vfs_ctx_t * ctx; // context descriptor |
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420 | vfs_dentry_t * dentry; // dentry descriptor (to be allocated) |
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421 | kmem_req_t req; // request to kernel memory allocator |
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422 | |
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423 | #if DEBUG_VFS_DENTRY_CREATE |
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424 | thread_t * this = CURRENT_THREAD; |
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425 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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426 | if( DEBUG_VFS_DENTRY_CREATE < cycle ) |
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427 | printk("\n[%s] thread[%x,%x] enter for <%s> / parent_inode %x / cycle %d\n", |
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428 | __FUNCTION__, this->process->pid, this->trdid, name, parent, cycle ); |
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429 | #endif |
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430 | |
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431 | // get pointer on context |
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432 | if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS]; |
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433 | else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS]; |
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434 | else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS]; |
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435 | else |
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436 | { |
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437 | ctx = NULL; |
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438 | return -1; |
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439 | } |
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440 | |
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441 | // get name length |
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442 | uint32_t length = strlen( name ); |
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443 | |
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444 | if( length >= CONFIG_VFS_MAX_NAME_LENGTH ) return EINVAL; |
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445 | |
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446 | // allocate memory for dentry descriptor |
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447 | req.type = KMEM_VFS_DENTRY; |
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448 | req.size = sizeof(vfs_dentry_t); |
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449 | req.flags = AF_KERNEL | AF_ZERO; |
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450 | dentry = (vfs_dentry_t *)kmem_alloc( &req ); |
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451 | |
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452 | if( dentry == NULL ) |
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453 | { |
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454 | printk("\n[ERROR] in %s : cannot allocate dentry descriptor\n", |
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455 | __FUNCTION__ ); |
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456 | return -1; |
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457 | } |
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458 | |
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459 | // initialize dentry descriptor |
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460 | dentry->ctx = ctx; |
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461 | dentry->length = length; |
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462 | dentry->extend = NULL; |
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463 | strcpy( dentry->name , name ); |
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464 | |
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465 | // return extended pointer on dentry |
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466 | *dentry_xp = XPTR( local_cxy , dentry ); |
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467 | |
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468 | #if DEBUG_VFS_DENTRY_CREATE |
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469 | cycle = (uint32_t)hal_get_cycles(); |
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470 | if( DEBUG_VFS_DENTRY_CREATE < cycle ) |
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471 | printk("\n[%s] thread[%x,%x] exit for <%s> / dentry [%x,%x] / cycle %d\n", |
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472 | __FUNCTION__, this->process->pid, this->trdid, name, local_cxy, dentry, cycle ); |
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473 | #endif |
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474 | |
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475 | return 0; |
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476 | |
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477 | } // end vfs_dentry_create() |
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478 | |
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479 | //////////////////////////////////////////////// |
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480 | void vfs_dentry_destroy( vfs_dentry_t * dentry ) |
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481 | { |
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482 | // release memory allocated to dentry |
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483 | kmem_req_t req; |
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484 | req.ptr = dentry; |
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485 | req.type = KMEM_VFS_DENTRY; |
---|
486 | kmem_free( &req ); |
---|
487 | |
---|
488 | } // end vfs_dentry_destroy() |
---|
489 | |
---|
490 | |
---|
491 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
492 | // VFS file descriptor related functions |
---|
493 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
494 | |
---|
495 | ///////////////////////////////////////////// |
---|
496 | error_t vfs_file_create( vfs_inode_t * inode, |
---|
497 | uint32_t attr, |
---|
498 | xptr_t * file_xp ) |
---|
499 | { |
---|
500 | vfs_file_t * file; |
---|
501 | kmem_req_t req; |
---|
502 | |
---|
503 | #if DEBUG_VFS_FILE_CREATE |
---|
504 | thread_t * this = CURRENT_THREAD; |
---|
505 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
506 | if( DEBUG_VFS_OPEN < cycle ) |
---|
507 | printk("\n[%s] thread[%x,%x] enter for inode %x in cluster %x / cycle %d\n", |
---|
508 | __FUNCTION__, this->process->pid, this->trdid, inode, local_cxy, cycle ); |
---|
509 | #endif |
---|
510 | |
---|
511 | // allocate memory for new file descriptor |
---|
512 | req.type = KMEM_VFS_FILE; |
---|
513 | req.size = sizeof(vfs_file_t); |
---|
514 | req.flags = AF_KERNEL | AF_ZERO; |
---|
515 | file = (vfs_file_t *)kmem_alloc( &req ); |
---|
516 | |
---|
517 | if( file == NULL ) return ENOMEM; |
---|
518 | |
---|
519 | // initializes new file descriptor |
---|
520 | file->gc = 0; |
---|
521 | file->type = inode->type; |
---|
522 | file->attr = attr; |
---|
523 | file->offset = 0; |
---|
524 | file->refcount = 1; |
---|
525 | file->inode = inode; |
---|
526 | file->ctx = inode->ctx; |
---|
527 | file->mapper = inode->mapper; |
---|
528 | |
---|
529 | remote_rwlock_init( XPTR( local_cxy , &file->lock ), LOCK_VFS_FILE ); |
---|
530 | |
---|
531 | *file_xp = XPTR( local_cxy , file ); |
---|
532 | |
---|
533 | #if DEBUG_VFS_FILE_CREATE |
---|
534 | cycle = (uint32_t)hal_get_cycles(); |
---|
535 | if( DEBUG_VFS_OPEN < cycle ) |
---|
536 | printk("\n[%s] thread[%x,%x] created file %x in cluster %x / cycle %d\n", |
---|
537 | __FUNCTION__, this->process->pid, this->trdid, file, local_cxy, cycle ); |
---|
538 | #endif |
---|
539 | |
---|
540 | return 0; |
---|
541 | |
---|
542 | } // end vfs_file_create() |
---|
543 | |
---|
544 | /////////////////////////////////////////// |
---|
545 | void vfs_file_destroy( vfs_file_t * file ) |
---|
546 | { |
---|
547 | |
---|
548 | // check refcount |
---|
549 | assert( (file->refcount == 0) , "refcount non zero\n" ); |
---|
550 | |
---|
551 | kmem_req_t req; |
---|
552 | req.ptr = file; |
---|
553 | req.type = KMEM_VFS_FILE; |
---|
554 | kmem_free( &req ); |
---|
555 | |
---|
556 | #if DEBUG_VFS_CLOSE |
---|
557 | thread_t * this = CURRENT_THREAD; |
---|
558 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
559 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
560 | printk("\n[%s] thread[%x,%x] deleted file %x in cluster %x / cycle %d\n", |
---|
561 | __FUNCTION__, this->process->pid, this->trdid, file, local_cxy, cycle ); |
---|
562 | #endif |
---|
563 | |
---|
564 | } // end vfs_file_destroy() |
---|
565 | |
---|
566 | |
---|
567 | //////////////////////////////////////// |
---|
568 | void vfs_file_count_up( xptr_t file_xp ) |
---|
569 | { |
---|
570 | // get file cluster and local pointer |
---|
571 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
572 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
573 | |
---|
574 | // atomically increment count |
---|
575 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->refcount ) , 1 ); |
---|
576 | } |
---|
577 | |
---|
578 | ////////////////////////////////////////// |
---|
579 | void vfs_file_count_down( xptr_t file_xp ) |
---|
580 | { |
---|
581 | // get file cluster and local pointer |
---|
582 | cxy_t file_cxy = GET_CXY( file_xp ); |
---|
583 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
---|
584 | |
---|
585 | // atomically decrement count |
---|
586 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->refcount ) , -1 ); |
---|
587 | } |
---|
588 | |
---|
589 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
590 | // "syscalls" API related functions |
---|
591 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
592 | |
---|
593 | ////////////////////////////////////// |
---|
594 | error_t vfs_open( xptr_t root_xp, |
---|
595 | char * path, |
---|
596 | xptr_t process_xp, |
---|
597 | uint32_t flags, |
---|
598 | uint32_t mode, |
---|
599 | xptr_t * new_file_xp, |
---|
600 | uint32_t * new_file_id ) |
---|
601 | { |
---|
602 | error_t error; |
---|
603 | xptr_t inode_xp; // extended pointer on target inode |
---|
604 | cxy_t inode_cxy; // inode cluster identifier |
---|
605 | vfs_inode_t * inode_ptr; // inode local pointer |
---|
606 | uint32_t file_attr; // file descriptor attributes |
---|
607 | uint32_t lookup_mode; // lookup working mode |
---|
608 | xptr_t file_xp; // extended pointer on created file descriptor |
---|
609 | uint32_t file_id; // created file descriptor index in reference fd_array |
---|
610 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
611 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
612 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
613 | xptr_t lock_xp; // extended pointer on Inode Tree lock |
---|
614 | |
---|
615 | if( mode != 0 ) |
---|
616 | { |
---|
617 | printk("\n[ERROR] in %s : the mode parameter is not supported yet\n" ); |
---|
618 | return -1; |
---|
619 | } |
---|
620 | |
---|
621 | thread_t * this = CURRENT_THREAD; |
---|
622 | process_t * process = this->process; |
---|
623 | |
---|
624 | #if DEBUG_VFS_OPEN |
---|
625 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
626 | if( DEBUG_VFS_OPEN < cycle ) |
---|
627 | printk("\n[%s] thread[%x,%x] enter for <%s> / root_inode (%x,%x) / cycle %d\n", |
---|
628 | __FUNCTION__, process->pid, this->trdid, path, GET_CXY(root_xp), GET_PTR(root_xp), cycle ); |
---|
629 | #endif |
---|
630 | |
---|
631 | // compute lookup working mode |
---|
632 | lookup_mode = VFS_LOOKUP_OPEN; |
---|
633 | if( (flags & O_DIR ) ) lookup_mode |= VFS_LOOKUP_DIR; |
---|
634 | if( (flags & O_CREAT ) ) lookup_mode |= VFS_LOOKUP_CREATE; |
---|
635 | if( (flags & O_EXCL ) ) lookup_mode |= VFS_LOOKUP_EXCL; |
---|
636 | |
---|
637 | // compute attributes for the created file |
---|
638 | file_attr = 0; |
---|
639 | if( (flags & O_RDONLY ) == 0 ) file_attr |= FD_ATTR_WRITE_ENABLE; |
---|
640 | if( (flags & O_WRONLY ) == 0 ) file_attr |= FD_ATTR_READ_ENABLE; |
---|
641 | if( (flags & O_SYNC ) ) file_attr |= FD_ATTR_SYNC; |
---|
642 | if( (flags & O_APPEND ) ) file_attr |= FD_ATTR_APPEND; |
---|
643 | if( (flags & O_CLOEXEC) ) file_attr |= FD_ATTR_CLOSE_EXEC; |
---|
644 | |
---|
645 | // build extended pointer on lock protecting Inode Tree |
---|
646 | vfs_root_xp = process->vfs_root_xp; |
---|
647 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
648 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
649 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
650 | |
---|
651 | // take lock protecting Inode Tree in read mode |
---|
652 | remote_rwlock_rd_acquire( lock_xp ); |
---|
653 | |
---|
654 | // get extended pointer on target inode |
---|
655 | error = vfs_lookup( root_xp, |
---|
656 | path, |
---|
657 | lookup_mode, |
---|
658 | &inode_xp, |
---|
659 | NULL ); |
---|
660 | |
---|
661 | // release lock protecting Inode Tree |
---|
662 | remote_rwlock_rd_release( lock_xp ); |
---|
663 | |
---|
664 | if( error ) |
---|
665 | { |
---|
666 | printk("\n[ERROR] in %s : cannot get inode <%s>\n", |
---|
667 | __FUNCTION__ , path ); |
---|
668 | return -1; |
---|
669 | } |
---|
670 | |
---|
671 | // get target inode cluster and local pointer |
---|
672 | inode_cxy = GET_CXY( inode_xp ); |
---|
673 | inode_ptr = GET_PTR( inode_xp ); |
---|
674 | |
---|
675 | #if (DEBUG_VFS_OPEN & 1) |
---|
676 | cycle = (uint32_t)hal_get_cycles(); |
---|
677 | if( DEBUG_VFS_OPEN < cycle ) |
---|
678 | printk("\n[%s] thread[%x,%x] found inode(%x,%x) for <%s>\n", |
---|
679 | __FUNCTION__, process->pid, this->trdid, inode_cxy, inode_ptr, path ); |
---|
680 | #endif |
---|
681 | |
---|
682 | // create a new file descriptor in cluster containing inode |
---|
683 | if( inode_cxy == local_cxy ) // target cluster is local |
---|
684 | { |
---|
685 | error = vfs_file_create( inode_ptr , file_attr , &file_xp ); |
---|
686 | } |
---|
687 | else // target cluster is remote |
---|
688 | { |
---|
689 | rpc_vfs_file_create_client( inode_cxy , inode_ptr , file_attr , &file_xp , &error ); |
---|
690 | } |
---|
691 | |
---|
692 | if( error ) return error; |
---|
693 | |
---|
694 | #if (DEBUG_VFS_OPEN & 1) |
---|
695 | cycle = (uint32_t)hal_get_cycles(); |
---|
696 | if( DEBUG_VFS_OPEN < cycle ) |
---|
697 | printk("\n[%s] thread[%x,%x] created file descriptor (%x,%x) for <%s>\n", |
---|
698 | __FUNCTION__, process->pid, this->trdid, GET_CXY(file_xp), GET_PTR(file_xp), path ); |
---|
699 | #endif |
---|
700 | |
---|
701 | // allocate and register a new file descriptor index in reference process |
---|
702 | error = process_fd_register( process_xp , file_xp , &file_id ); |
---|
703 | |
---|
704 | if( error ) return error; |
---|
705 | |
---|
706 | #if DEBUG_VFS_OPEN |
---|
707 | cycle = (uint32_t)hal_get_cycles(); |
---|
708 | if( DEBUG_VFS_OPEN < cycle ) |
---|
709 | printk("\n[%s] thread[%x,%x] exit for <%s> / fdid %d / cluster %x / cycle %d\n", |
---|
710 | __FUNCTION__, process->pid, this->trdid, path, file_id, GET_CXY( file_xp ), cycle ); |
---|
711 | #endif |
---|
712 | |
---|
713 | // success |
---|
714 | *new_file_xp = file_xp; |
---|
715 | *new_file_id = file_id; |
---|
716 | return 0; |
---|
717 | |
---|
718 | } // end vfs_open() |
---|
719 | |
---|
720 | ////////////////////////////////////// |
---|
721 | int vfs_user_move( bool_t to_buffer, |
---|
722 | xptr_t file_xp, |
---|
723 | void * buffer, |
---|
724 | uint32_t size ) |
---|
725 | { |
---|
726 | cxy_t file_cxy; // remote file descriptor cluster |
---|
727 | vfs_file_t * file_ptr; // remote file descriptor local pointer |
---|
728 | vfs_inode_type_t inode_type; |
---|
729 | uint32_t file_offset; // current offset in file |
---|
730 | mapper_t * mapper; |
---|
731 | error_t error; |
---|
732 | |
---|
733 | // check argument |
---|
734 | assert( (file_xp != XPTR_NULL), "file_xp == XPTR_NULL\n" ); |
---|
735 | |
---|
736 | // get cluster and local pointer on remote file descriptor |
---|
737 | file_cxy = GET_CXY( file_xp ); |
---|
738 | file_ptr = GET_PTR( file_xp ); |
---|
739 | |
---|
740 | // get inode type from remote file descriptor |
---|
741 | inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) ); |
---|
742 | |
---|
743 | // check inode type |
---|
744 | assert( (inode_type == INODE_TYPE_FILE), "inode type is not INODE_TYPE_FILE" ); |
---|
745 | |
---|
746 | // get mapper pointer and file offset from file descriptor |
---|
747 | file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) ); |
---|
748 | mapper = (mapper_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
749 | |
---|
750 | // move data between mapper and buffer |
---|
751 | error = mapper_move_user( XPTR( file_cxy , mapper ), |
---|
752 | to_buffer, |
---|
753 | file_offset, |
---|
754 | buffer, |
---|
755 | size ); |
---|
756 | |
---|
757 | // update file offset in file descriptor |
---|
758 | hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->offset ) , size ); |
---|
759 | |
---|
760 | if( error ) |
---|
761 | { |
---|
762 | return -1; |
---|
763 | } |
---|
764 | |
---|
765 | return size; |
---|
766 | |
---|
767 | } // end vfs_user_move() |
---|
768 | |
---|
769 | //////////////////////////////////////////// |
---|
770 | error_t vfs_kernel_move( bool_t to_buffer, |
---|
771 | xptr_t file_xp, |
---|
772 | xptr_t buffer_xp, |
---|
773 | uint32_t size ) |
---|
774 | { |
---|
775 | cxy_t file_cxy; // remote file descriptor cluster |
---|
776 | vfs_file_t * file_ptr; // remote file descriptor local pointer |
---|
777 | vfs_inode_type_t inode_type; // remote file type |
---|
778 | uint32_t file_offset; // current offset in file |
---|
779 | mapper_t * mapper_ptr; // remote mapper local pointer |
---|
780 | xptr_t mapper_xp; // remote mapper extended pointer |
---|
781 | error_t error; |
---|
782 | |
---|
783 | // check argument |
---|
784 | assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL\n" ); |
---|
785 | |
---|
786 | // get cluster and local pointer on remote file descriptor |
---|
787 | file_cxy = GET_CXY( file_xp ); |
---|
788 | file_ptr = GET_PTR( file_xp ); |
---|
789 | |
---|
790 | // get inode type from remote file descriptor |
---|
791 | inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) ); |
---|
792 | |
---|
793 | // action depends on inode type |
---|
794 | if( inode_type == INODE_TYPE_FILE ) |
---|
795 | { |
---|
796 | // get mapper pointers and file offset from file descriptor |
---|
797 | file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) ); |
---|
798 | mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) ); |
---|
799 | mapper_xp = XPTR( file_cxy , mapper_ptr ); |
---|
800 | |
---|
801 | // move data between mapper and buffer |
---|
802 | error = mapper_move_kernel( mapper_xp, |
---|
803 | to_buffer, |
---|
804 | file_offset, |
---|
805 | buffer_xp, |
---|
806 | size ); |
---|
807 | if( error ) return -1; |
---|
808 | } |
---|
809 | else |
---|
810 | { |
---|
811 | printk("\n[ERROR] in %s : inode is not a file", __FUNCTION__ ); |
---|
812 | return -1; |
---|
813 | } |
---|
814 | |
---|
815 | return 0; |
---|
816 | |
---|
817 | } // end vfs_kernel_move() |
---|
818 | |
---|
819 | ////////////////////////////////////// |
---|
820 | error_t vfs_lseek( xptr_t file_xp, |
---|
821 | uint32_t offset, |
---|
822 | uint32_t whence, |
---|
823 | uint32_t * new_offset ) |
---|
824 | { |
---|
825 | xptr_t offset_xp; |
---|
826 | xptr_t lock_xp; |
---|
827 | xptr_t size_xp; |
---|
828 | cxy_t file_cxy; |
---|
829 | vfs_file_t * file_ptr; |
---|
830 | vfs_inode_t * inode_ptr; |
---|
831 | uint32_t new; |
---|
832 | |
---|
833 | // check argument |
---|
834 | assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL\n" ); |
---|
835 | |
---|
836 | // get cluster and local pointer on remote file descriptor |
---|
837 | file_cxy = GET_CXY( file_xp ); |
---|
838 | file_ptr = GET_PTR( file_xp ); |
---|
839 | |
---|
840 | // get local pointer on remote inode |
---|
841 | inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) ); |
---|
842 | |
---|
843 | // build extended pointers on lock, offset and size |
---|
844 | offset_xp = XPTR( file_cxy , &file_ptr->offset ); |
---|
845 | lock_xp = XPTR( file_cxy , &file_ptr->lock ); |
---|
846 | size_xp = XPTR( file_cxy , &inode_ptr->size ); |
---|
847 | |
---|
848 | // take file descriptor lock |
---|
849 | remote_rwlock_wr_acquire( lock_xp ); |
---|
850 | |
---|
851 | if ( whence == SEEK_CUR ) // new = current + offset |
---|
852 | { |
---|
853 | new = hal_remote_l32( offset_xp ) + offset; |
---|
854 | } |
---|
855 | else if ( whence == SEEK_SET ) // new = offset |
---|
856 | { |
---|
857 | new = offset; |
---|
858 | } |
---|
859 | else if ( whence == SEEK_END ) // new = size + offset |
---|
860 | { |
---|
861 | new = hal_remote_l32( size_xp ) + offset; |
---|
862 | } |
---|
863 | else |
---|
864 | { |
---|
865 | printk("\n[ERROR] in %s : illegal whence value\n", __FUNCTION__ ); |
---|
866 | remote_rwlock_wr_release( lock_xp ); |
---|
867 | return -1; |
---|
868 | } |
---|
869 | |
---|
870 | #if DEBUG_VFS_LSEEK |
---|
871 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
872 | thread_t * this = CURRENT_THREAD; |
---|
873 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
874 | vfs_inode_get_name( XPTR( file_cxy , inode_ptr ) , name ); |
---|
875 | if( cycle > DEBUG_VFS_LSEEK ) |
---|
876 | printk("\n[%s] thread[%x,%x] for <%s> / new offset %d / cycle %d\n", |
---|
877 | __FUNCTION__ , this->process->pid, this->trdid, name, new, cycle ); |
---|
878 | #endif |
---|
879 | |
---|
880 | // set new offset |
---|
881 | hal_remote_s32( offset_xp , new ); |
---|
882 | |
---|
883 | // release file descriptor lock |
---|
884 | remote_rwlock_wr_release( lock_xp ); |
---|
885 | |
---|
886 | // success |
---|
887 | if ( new_offset != NULL ) *new_offset = new; |
---|
888 | return 0; |
---|
889 | |
---|
890 | } // vfs_lseek() |
---|
891 | |
---|
892 | /////////////////////////////////// |
---|
893 | error_t vfs_close( xptr_t file_xp, |
---|
894 | uint32_t file_id ) |
---|
895 | { |
---|
896 | cluster_t * cluster; // local pointer on local cluster |
---|
897 | cxy_t file_cxy; // cluster containing the file descriptor. |
---|
898 | vfs_file_t * file_ptr; // local ponter on file descriptor |
---|
899 | cxy_t owner_cxy; // process owner cluster |
---|
900 | lpid_t lpid; // process local index |
---|
901 | xptr_t root_xp; // root of list of process copies |
---|
902 | xptr_t lock_xp; // lock protecting the list of copies |
---|
903 | xptr_t iter_xp; // iterator on list of process copies |
---|
904 | xptr_t process_xp; // extended pointer on one process copy |
---|
905 | cxy_t process_cxy; // process copy cluster |
---|
906 | process_t * process_ptr; // process copy local pointer |
---|
907 | |
---|
908 | // check arguments |
---|
909 | assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL\n" ); |
---|
910 | assert( (file_id < CONFIG_PROCESS_FILE_MAX_NR) , "illegal file_id\n" ); |
---|
911 | |
---|
912 | thread_t * this = CURRENT_THREAD; |
---|
913 | process_t * process = this->process; |
---|
914 | |
---|
915 | #if DEBUG_VFS_CLOSE |
---|
916 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
917 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
918 | printk("\n[%s] thread[%x,%x] enter / fdid %d / cycle %d\n", |
---|
919 | __FUNCTION__, process->pid, this->trdid, file_id, cycle ); |
---|
920 | #endif |
---|
921 | |
---|
922 | // get local pointer on local cluster manager |
---|
923 | cluster = LOCAL_CLUSTER; |
---|
924 | |
---|
925 | // get owner process cluster and lpid |
---|
926 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
927 | lpid = LPID_FROM_PID( process->pid ); |
---|
928 | |
---|
929 | // get extended pointers on copies root and lock |
---|
930 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
931 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
932 | |
---|
933 | // 1) loop on the process descriptor copies to reset all fd_array[file_id] entries |
---|
934 | |
---|
935 | // take the lock protecting the list of copies |
---|
936 | remote_queuelock_acquire( lock_xp ); |
---|
937 | |
---|
938 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
939 | { |
---|
940 | process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
941 | process_cxy = GET_CXY( process_xp ); |
---|
942 | process_ptr = GET_PTR( process_xp ); |
---|
943 | |
---|
944 | #if (DEBUG_VFS_CLOSE & 1 ) |
---|
945 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
946 | printk("\n[%s] reset fd_array[%d] for process %x in cluster %x\n", |
---|
947 | __FUNCTION__, file_id, process_ptr, process_cxy ); |
---|
948 | #endif |
---|
949 | |
---|
950 | // fd_array lock is required for atomic write of a 64 bits word |
---|
951 | // xptr_t fd_array_lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock ); |
---|
952 | |
---|
953 | xptr_t entry_xp = XPTR( process_cxy , &process_ptr->fd_array.array[file_id] ); |
---|
954 | |
---|
955 | // remote_rwlock_wr_acquire( fd_array_lock_xp ); |
---|
956 | |
---|
957 | hal_remote_s64( entry_xp , XPTR_NULL ); |
---|
958 | |
---|
959 | // remote_rwlock_wr_release( fd_array_lock_xp ); |
---|
960 | |
---|
961 | vfs_file_count_down( file_xp ); |
---|
962 | |
---|
963 | hal_fence(); |
---|
964 | } |
---|
965 | |
---|
966 | // release the lock protecting the list of copies |
---|
967 | remote_queuelock_release( lock_xp ); |
---|
968 | |
---|
969 | #if (DEBUG_VFS_CLOSE & 1) |
---|
970 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
971 | printk("\n[%s] thread[%x,%x] reset all fd-array copies\n", |
---|
972 | __FUNCTION__, process->pid, this->trdid ); |
---|
973 | #endif |
---|
974 | |
---|
975 | // 2) release memory allocated to file descriptor in remote cluster |
---|
976 | |
---|
977 | // get cluster and local pointer on remote file descriptor |
---|
978 | file_cxy = GET_CXY( file_xp ); |
---|
979 | file_ptr = GET_PTR( file_xp ); |
---|
980 | |
---|
981 | if( file_cxy == local_cxy ) // file cluster is local |
---|
982 | { |
---|
983 | vfs_file_destroy( file_ptr ); |
---|
984 | } |
---|
985 | else // file cluster is local |
---|
986 | { |
---|
987 | rpc_vfs_file_destroy_client( file_cxy , file_ptr ); |
---|
988 | } |
---|
989 | |
---|
990 | #if DEBUG_VFS_CLOSE |
---|
991 | cycle = (uint32_t)hal_get_cycles(); |
---|
992 | if( DEBUG_VFS_CLOSE < cycle ) |
---|
993 | printk("\n[%s] thread[%x,%x] exit / fdid %d closed / cycle %d\n", |
---|
994 | __FUNCTION__, process->pid, this->trdid, file_id, cycle ); |
---|
995 | #endif |
---|
996 | |
---|
997 | return 0; |
---|
998 | |
---|
999 | } // end vfs_close() |
---|
1000 | |
---|
1001 | //////////////////////////////////// |
---|
1002 | error_t vfs_mkdir( xptr_t root_xp, |
---|
1003 | char * path, |
---|
1004 | uint32_t rights ) |
---|
1005 | { |
---|
1006 | error_t error; |
---|
1007 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1008 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
1009 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1010 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1011 | xptr_t inode_xp; // extended pointer on target inode |
---|
1012 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
1013 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1014 | xptr_t dentry_xp; // extended pointer on new dentry |
---|
1015 | vfs_dentry_t * dentry_ptr; // target dentry local pointer |
---|
1016 | xptr_t parent_xp; // extended pointer on new parent inode |
---|
1017 | vfs_inode_t * parent_ptr; // local pointer on new parent inode |
---|
1018 | cxy_t parent_cxy; // new parent inode cluster identifier |
---|
1019 | vfs_ctx_t * parent_ctx_ptr; // local pointer on target inode context |
---|
1020 | uint32_t parent_fs_type; // target inode file system type |
---|
1021 | |
---|
1022 | xptr_t parents_root_xp; // extended pointer on parents field in inode (root) |
---|
1023 | xptr_t parents_entry_xp; // extended pointer on parents field in dentry |
---|
1024 | xptr_t children_xhtab_xp; // extended pointer on children field in inode (root) |
---|
1025 | xptr_t children_entry_xp; // extended pointer on children field in dentry |
---|
1026 | |
---|
1027 | char last_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1028 | |
---|
1029 | thread_t * this = CURRENT_THREAD; |
---|
1030 | process_t * process = this->process; |
---|
1031 | |
---|
1032 | #if DEBUG_VFS_MKDIR |
---|
1033 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1034 | vfs_inode_get_name( root_xp , root_name ); |
---|
1035 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1036 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1037 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / cycle %d\n", |
---|
1038 | __FUNCTION__, process->pid, this->trdid, root_name, path, cycle ); |
---|
1039 | #endif |
---|
1040 | |
---|
1041 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1042 | vfs_root_xp = process->vfs_root_xp; |
---|
1043 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1044 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1045 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1046 | |
---|
1047 | // take the lock protecting Inode Tree in write mode |
---|
1048 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1049 | |
---|
1050 | // 1. get pointers on parent inode |
---|
1051 | error = vfs_lookup( root_xp, |
---|
1052 | path, |
---|
1053 | VFS_LOOKUP_DIR | VFS_LOOKUP_PARENT, |
---|
1054 | &parent_xp, |
---|
1055 | last_name ); |
---|
1056 | if( error ) |
---|
1057 | { |
---|
1058 | remote_rwlock_wr_release( lock_xp ); |
---|
1059 | printk("\n[ERROR] in %s : cannot get parent inode for <%s>\n", |
---|
1060 | __FUNCTION__, path ); |
---|
1061 | return -1; |
---|
1062 | } |
---|
1063 | |
---|
1064 | // get parent inode cluster and local pointer |
---|
1065 | parent_cxy = GET_CXY( parent_xp ); |
---|
1066 | parent_ptr = GET_PTR( parent_xp ); |
---|
1067 | |
---|
1068 | #if( DEBUG_VFS_MKDIR & 1 ) |
---|
1069 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1070 | printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n", |
---|
1071 | __FUNCTION__, process->pid, this->trdid, parent_cxy, parent_ptr, path ); |
---|
1072 | #endif |
---|
1073 | |
---|
1074 | // get parent inode context, and FS type |
---|
1075 | parent_ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) ); |
---|
1076 | parent_fs_type = hal_remote_l32( XPTR( parent_cxy , &parent_ctx_ptr->type ) ); |
---|
1077 | |
---|
1078 | // 2. create one new dentry in parent cluster |
---|
1079 | if( parent_cxy == local_cxy ) |
---|
1080 | { |
---|
1081 | error = vfs_dentry_create( parent_fs_type, |
---|
1082 | last_name, |
---|
1083 | &dentry_xp ); |
---|
1084 | } |
---|
1085 | else |
---|
1086 | { |
---|
1087 | rpc_vfs_dentry_create_client( parent_cxy, |
---|
1088 | parent_fs_type, |
---|
1089 | last_name, |
---|
1090 | &dentry_xp, |
---|
1091 | &error ); |
---|
1092 | } |
---|
1093 | |
---|
1094 | if( error ) |
---|
1095 | { |
---|
1096 | remote_rwlock_wr_release( lock_xp ); |
---|
1097 | printk("\n[ERROR] in %s : cannot create new dentry in cluster %x for <%s>\n", |
---|
1098 | __FUNCTION__, parent_cxy, path ); |
---|
1099 | return -1; |
---|
1100 | } |
---|
1101 | |
---|
1102 | // get local pointer on dentry |
---|
1103 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1104 | |
---|
1105 | #if( DEBUG_VFS_MKDIR & 1 ) |
---|
1106 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1107 | printk("\n[%s] thread[%x,%x] created new dentry (%x,%x) for <%s>\n", |
---|
1108 | __FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, path ); |
---|
1109 | #endif |
---|
1110 | |
---|
1111 | // 3. create new directory inode in child cluster |
---|
1112 | // TODO : define attr / uid / gid |
---|
1113 | uint32_t attr = 0; |
---|
1114 | uint32_t uid = 0; |
---|
1115 | uint32_t gid = 0; |
---|
1116 | |
---|
1117 | // select a target cluster for new inode |
---|
1118 | inode_cxy = cluster_random_select(); |
---|
1119 | |
---|
1120 | if( inode_cxy == local_cxy ) // child cluster is local |
---|
1121 | { |
---|
1122 | error = vfs_inode_create( parent_fs_type, |
---|
1123 | INODE_TYPE_DIR, |
---|
1124 | attr, |
---|
1125 | rights, |
---|
1126 | uid, |
---|
1127 | gid, |
---|
1128 | &inode_xp ); |
---|
1129 | } |
---|
1130 | else // child cluster is remote |
---|
1131 | { |
---|
1132 | rpc_vfs_inode_create_client( inode_cxy, |
---|
1133 | parent_fs_type, |
---|
1134 | INODE_TYPE_DIR, |
---|
1135 | attr, |
---|
1136 | rights, |
---|
1137 | uid, |
---|
1138 | gid, |
---|
1139 | &inode_xp, |
---|
1140 | &error ); |
---|
1141 | } |
---|
1142 | |
---|
1143 | if( error ) |
---|
1144 | { |
---|
1145 | printk("\n[ERROR] in %s : cannot create new inode in cluster %x for <%s>\n", |
---|
1146 | __FUNCTION__ , inode_cxy , path ); |
---|
1147 | |
---|
1148 | if( parent_cxy == local_cxy ) vfs_dentry_destroy( dentry_ptr ); |
---|
1149 | else rpc_vfs_dentry_destroy_client( parent_cxy , dentry_ptr ); |
---|
1150 | return -1; |
---|
1151 | } |
---|
1152 | |
---|
1153 | // get new inode local pointer |
---|
1154 | inode_ptr = GET_PTR( inode_xp ); |
---|
1155 | |
---|
1156 | #if(DEBUG_VFS_MKDIR & 1) |
---|
1157 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1158 | printk("\n[%s] thread[%x,%x] created new inode (%x,%x) for <%s>\n", |
---|
1159 | __FUNCTION__ , process->pid, this->trdid, inode_cxy, inode_ptr, path ); |
---|
1160 | #endif |
---|
1161 | |
---|
1162 | // 4. register dentry in new inode list of parents |
---|
1163 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
1164 | parents_entry_xp = XPTR( parent_cxy , &dentry_ptr->parents ); |
---|
1165 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
1166 | hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 ); |
---|
1167 | |
---|
1168 | // 5. register dentry in parent inode |
---|
1169 | children_xhtab_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
1170 | children_entry_xp = XPTR( parent_cxy , &dentry_ptr->children ); |
---|
1171 | xhtab_insert( children_xhtab_xp , last_name , children_entry_xp ); |
---|
1172 | |
---|
1173 | // 6. update "parent" and "child_xp" fields in dentry |
---|
1174 | hal_remote_s64( XPTR( parent_cxy , &dentry_ptr->child_xp ) , inode_xp ); |
---|
1175 | hal_remote_spt( XPTR( parent_cxy , &dentry_ptr->parent ) , parent_ptr ); |
---|
1176 | |
---|
1177 | #if(DEBUG_VFS_MKDIR & 1) |
---|
1178 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1179 | printk("\n[%s] thread[%x,%x] updated Inode Tree for <%s>\n", |
---|
1180 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
1181 | #endif |
---|
1182 | |
---|
1183 | // release the lock protecting Inode Tree |
---|
1184 | remote_rwlock_wr_release( lock_xp ); |
---|
1185 | |
---|
1186 | // 5. update parent directory mapper |
---|
1187 | // and synchronize the parent directory on IOC device |
---|
1188 | if (parent_cxy == local_cxy) |
---|
1189 | { |
---|
1190 | error = vfs_fs_add_dentry( parent_ptr, |
---|
1191 | dentry_ptr ); |
---|
1192 | } |
---|
1193 | else |
---|
1194 | { |
---|
1195 | rpc_vfs_fs_add_dentry_client( parent_cxy, |
---|
1196 | parent_ptr, |
---|
1197 | dentry_ptr, |
---|
1198 | &error ); |
---|
1199 | } |
---|
1200 | |
---|
1201 | if( error ) |
---|
1202 | { |
---|
1203 | printk("\n[ERROR] in %s : cannot update parent directory for <%s>\n", |
---|
1204 | __FUNCTION__, path ); |
---|
1205 | return -1; |
---|
1206 | } |
---|
1207 | |
---|
1208 | #if(DEBUG_VFS_MKDIR & 1) |
---|
1209 | if( DEBUG_VFS_MKDIR < cycle ) |
---|
1210 | printk("\n[%s] thread[%x,%x] updated parent dir (mapper and IOC) for <%s>\n", |
---|
1211 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
1212 | #endif |
---|
1213 | |
---|
1214 | return 0; |
---|
1215 | |
---|
1216 | } // end vfs_mkdir() |
---|
1217 | |
---|
1218 | /////////////////////////////////////// |
---|
1219 | error_t vfs_link( xptr_t old_root_xp, |
---|
1220 | char * old_path, |
---|
1221 | xptr_t new_root_xp, |
---|
1222 | char * new_path ) |
---|
1223 | { |
---|
1224 | error_t error; |
---|
1225 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1226 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
1227 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1228 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1229 | xptr_t inode_xp; // extended pointer on target inode |
---|
1230 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
1231 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1232 | uint32_t inode_type; // target inode type |
---|
1233 | vfs_ctx_t * inode_ctx_ptr; // local pointer on target inode context |
---|
1234 | uint32_t inode_fs_type; // target inode file system type |
---|
1235 | xptr_t dentry_xp; // extended pointer on new dentry |
---|
1236 | vfs_dentry_t * dentry_ptr; // target dentry local pointer |
---|
1237 | xptr_t new_parent_xp; // extended pointer on new parent inode |
---|
1238 | vfs_inode_t * new_parent_ptr; // local pointer on new parent inode |
---|
1239 | cxy_t new_parent_cxy; // new parent inode cluster identifier |
---|
1240 | |
---|
1241 | xptr_t parents_root_xp; // extended pointer on parents field in inode (root) |
---|
1242 | xptr_t parents_entry_xp; // extended pointer on parents field in dentry |
---|
1243 | xptr_t children_xhtab_xp; // extended pointer on children field in inode (root) |
---|
1244 | xptr_t children_entry_xp; // extended pointer on children field in dentry |
---|
1245 | |
---|
1246 | char new_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1247 | |
---|
1248 | thread_t * this = CURRENT_THREAD; |
---|
1249 | process_t * process = this->process; |
---|
1250 | |
---|
1251 | #if DEBUG_VFS_LINK |
---|
1252 | char old_root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1253 | char new_root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1254 | vfs_inode_get_name( old_root_xp , old_root_name ); |
---|
1255 | vfs_inode_get_name( new_root_xp , new_root_name ); |
---|
1256 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1257 | if( DEBUG_VFS_LINK < cycle ) |
---|
1258 | printk("\n[%s] thread[%x,%x] enter / old_root <%s> / old_path <%s> / " |
---|
1259 | "new_root <%s> / new_path <%s> / cycle %d\n", |
---|
1260 | __FUNCTION__, process->pid, this->trdid, |
---|
1261 | old_root_name, old_path, new_root_name, new_path, cycle ); |
---|
1262 | #endif |
---|
1263 | |
---|
1264 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1265 | vfs_root_xp = process->vfs_root_xp; |
---|
1266 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1267 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1268 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1269 | |
---|
1270 | // take the lock protecting Inode Tree in write mode |
---|
1271 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1272 | |
---|
1273 | // get extended pointer on target inode |
---|
1274 | error = vfs_lookup( old_root_xp, |
---|
1275 | old_path, |
---|
1276 | 0, |
---|
1277 | &inode_xp, |
---|
1278 | NULL ); |
---|
1279 | if( error ) |
---|
1280 | { |
---|
1281 | remote_rwlock_wr_release( lock_xp ); |
---|
1282 | printk("\n[ERROR] in %s : cannot get target inode for <%s>\n", |
---|
1283 | __FUNCTION__, old_path ); |
---|
1284 | return -1; |
---|
1285 | } |
---|
1286 | |
---|
1287 | #if( DEBUG_VFS_LINK & 1 ) |
---|
1288 | if( DEBUG_VFS_LINK < cycle ) |
---|
1289 | printk("\n[%s] thread[%x,%x] get child inode (%x,%x) for <%s>\n", |
---|
1290 | __FUNCTION__, process->pid, this->trdid, |
---|
1291 | GET_CXY(inode_xp), GET_PTR(inode_xp), old_path, cycle ); |
---|
1292 | #endif |
---|
1293 | |
---|
1294 | // get extended pointer on parent inode in new path |
---|
1295 | error = vfs_lookup( new_root_xp, |
---|
1296 | new_path, |
---|
1297 | VFS_LOOKUP_PARENT, |
---|
1298 | &new_parent_xp, |
---|
1299 | new_name ); |
---|
1300 | if( error ) |
---|
1301 | { |
---|
1302 | remote_rwlock_wr_release( lock_xp ); |
---|
1303 | printk("\n[ERROR] in %s : cannot get parent inode for <%s>\n", |
---|
1304 | __FUNCTION__, new_path ); |
---|
1305 | return -1; |
---|
1306 | } |
---|
1307 | |
---|
1308 | #if( DEBUG_VFS_LINK & 1 ) |
---|
1309 | if( DEBUG_VFS_LINK < cycle ) |
---|
1310 | printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n", |
---|
1311 | __FUNCTION__, process->pid, this->trdid, |
---|
1312 | GET_CXY(new_parent_xp), GET_PTR(new_parent_xp), new_path ); |
---|
1313 | #endif |
---|
1314 | |
---|
1315 | // get target inode cluster and local pointer |
---|
1316 | inode_cxy = GET_CXY( inode_xp ); |
---|
1317 | inode_ptr = GET_PTR( inode_xp ); |
---|
1318 | |
---|
1319 | // get target inode type, context, and FS type |
---|
1320 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1321 | inode_ctx_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->ctx ) ); |
---|
1322 | inode_fs_type = hal_remote_l32( XPTR( inode_cxy , &inode_ctx_ptr->type ) ); |
---|
1323 | |
---|
1324 | // get new parent inode cluster an local pointer |
---|
1325 | new_parent_ptr = GET_PTR( new_parent_xp ); |
---|
1326 | new_parent_cxy = GET_CXY( new_parent_xp ); |
---|
1327 | |
---|
1328 | /////////////////////////////////////////////////////////////////////// |
---|
1329 | if( (inode_type == INODE_TYPE_FILE) || (inode_type == INODE_TYPE_DIR) ) |
---|
1330 | { |
---|
1331 | // 1. create one new dentry |
---|
1332 | if( new_parent_cxy == local_cxy ) |
---|
1333 | { |
---|
1334 | error = vfs_dentry_create( inode_fs_type, |
---|
1335 | new_name, |
---|
1336 | &dentry_xp ); |
---|
1337 | } |
---|
1338 | else |
---|
1339 | { |
---|
1340 | rpc_vfs_dentry_create_client( new_parent_cxy, |
---|
1341 | inode_fs_type, |
---|
1342 | new_name, |
---|
1343 | &dentry_xp, |
---|
1344 | &error ); |
---|
1345 | } |
---|
1346 | |
---|
1347 | if( error ) |
---|
1348 | { |
---|
1349 | remote_rwlock_wr_release( lock_xp ); |
---|
1350 | printk("\n[ERROR] in %s : cannot create new dentry for <%s>\n", |
---|
1351 | __FUNCTION__, new_path ); |
---|
1352 | return -1; |
---|
1353 | } |
---|
1354 | |
---|
1355 | // get local pointer on dentry |
---|
1356 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1357 | |
---|
1358 | // 2. register dentry in target inode |
---|
1359 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
1360 | parents_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->parents ); |
---|
1361 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
1362 | hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 ); |
---|
1363 | |
---|
1364 | // 3. register dentry in parent inode |
---|
1365 | children_xhtab_xp = XPTR( new_parent_cxy , &new_parent_ptr->children ); |
---|
1366 | children_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->children ); |
---|
1367 | xhtab_insert( children_xhtab_xp , new_name , children_entry_xp ); |
---|
1368 | |
---|
1369 | // 4. update "parent" and "child_xp" fields in dentry |
---|
1370 | hal_remote_s64( XPTR( new_parent_cxy , &dentry_ptr->child_xp ) , inode_xp ); |
---|
1371 | hal_remote_spt( XPTR( new_parent_cxy , &dentry_ptr->parent ) , new_parent_ptr ); |
---|
1372 | |
---|
1373 | #if(DEBUG_VFS_LINK & 1) |
---|
1374 | if( DEBUG_VFS_LINK < cycle ) |
---|
1375 | printk("\n[%s] thread[%x,%x] updated Inode Tree / old <%s> / new <%s>\n", |
---|
1376 | __FUNCTION__, process->pid, this->trdid, old_path, new_path ); |
---|
1377 | vfs_display( new_parent_xp ); |
---|
1378 | #endif |
---|
1379 | |
---|
1380 | // release the lock protecting Inode Tree |
---|
1381 | remote_rwlock_wr_release( lock_xp ); |
---|
1382 | |
---|
1383 | // 5. update new parent directory mapper in Inode Tree |
---|
1384 | // and synchronize the parent directory on IOC device |
---|
1385 | if (new_parent_cxy == local_cxy) |
---|
1386 | { |
---|
1387 | error = vfs_fs_add_dentry( new_parent_ptr, |
---|
1388 | dentry_ptr ); |
---|
1389 | } |
---|
1390 | else |
---|
1391 | { |
---|
1392 | rpc_vfs_fs_add_dentry_client( new_parent_cxy, |
---|
1393 | new_parent_ptr, |
---|
1394 | dentry_ptr, |
---|
1395 | &error ); |
---|
1396 | } |
---|
1397 | if( error ) |
---|
1398 | { |
---|
1399 | printk("\n[ERROR] in %s : cannot update new parent directory for <%s>\n", |
---|
1400 | __FUNCTION__, new_path ); |
---|
1401 | return -1; |
---|
1402 | } |
---|
1403 | |
---|
1404 | #if(DEBUG_VFS_LINK & 1) |
---|
1405 | if( DEBUG_VFS_LINK < cycle ) |
---|
1406 | printk("\n[%s] thread[%x,%x] updated new parent dir (mapper and IOC) / old <%s> / new <%s>\n", |
---|
1407 | __FUNCTION__, process->pid, this->trdid, old_path, new_path ); |
---|
1408 | #endif |
---|
1409 | return 0; |
---|
1410 | } |
---|
1411 | else |
---|
1412 | { |
---|
1413 | // release the lock protecting Inode Tree |
---|
1414 | remote_rwlock_wr_release( lock_xp ); |
---|
1415 | |
---|
1416 | printk("\n[ERROR] in %s : unsupported inode type %s\n", |
---|
1417 | __FUNCTION__ , vfs_inode_type_str( inode_type ) ); |
---|
1418 | return -1; |
---|
1419 | } |
---|
1420 | |
---|
1421 | } // end vfs_link() |
---|
1422 | |
---|
1423 | ///////////////////////////////////// |
---|
1424 | error_t vfs_unlink( xptr_t root_xp, |
---|
1425 | char * path ) |
---|
1426 | { |
---|
1427 | error_t error; |
---|
1428 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1429 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
1430 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1431 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1432 | xptr_t parent_xp; // extended pointer on target inode |
---|
1433 | cxy_t parent_cxy; // target inode cluster identifier |
---|
1434 | vfs_inode_t * parent_ptr; // target inode local pointer |
---|
1435 | xptr_t inode_xp; // extended pointer on target inode |
---|
1436 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1437 | vfs_inode_t * inode_ptr; // target inode local pointer |
---|
1438 | uint32_t inode_links; // target inode links count |
---|
1439 | vfs_inode_type_t inode_type; // target inode type |
---|
1440 | uint32_t inode_children; // target inode number of children |
---|
1441 | xptr_t dentry_xp; // extended pointer on dentry to unlink |
---|
1442 | vfs_dentry_t * dentry_ptr; // local pointer on dentry to unlink |
---|
1443 | |
---|
1444 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // name of link to remove |
---|
1445 | |
---|
1446 | thread_t * this = CURRENT_THREAD; |
---|
1447 | process_t * process = this->process; |
---|
1448 | |
---|
1449 | #if DEBUG_VFS_UNLINK |
---|
1450 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1451 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1452 | vfs_inode_get_name( root_xp , root_name ); |
---|
1453 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1454 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / cycle %d\n", |
---|
1455 | __FUNCTION__, process->pid, this->trdid, root_name, path, cycle ); |
---|
1456 | #endif |
---|
1457 | |
---|
1458 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1459 | vfs_root_xp = process->vfs_root_xp; |
---|
1460 | vfs_root_ptr = GET_PTR( root_xp ); |
---|
1461 | vfs_root_cxy = GET_CXY( root_xp ); |
---|
1462 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1463 | |
---|
1464 | // take the lock protecting Inode Tree |
---|
1465 | remote_rwlock_wr_acquire( lock_xp ); |
---|
1466 | |
---|
1467 | // get extended pointer on parent inode |
---|
1468 | error = vfs_lookup( root_xp, |
---|
1469 | path, |
---|
1470 | VFS_LOOKUP_PARENT, |
---|
1471 | &parent_xp, |
---|
1472 | name ); |
---|
1473 | if( error ) |
---|
1474 | { |
---|
1475 | remote_rwlock_wr_release( lock_xp ); |
---|
1476 | printk("\n[ERROR] in %s : cannot get parent inode for <%s> in <%s>\n", |
---|
1477 | __FUNCTION__, name, path ); |
---|
1478 | return -1; |
---|
1479 | } |
---|
1480 | |
---|
1481 | // get parent inode cluster and local pointer |
---|
1482 | parent_cxy = GET_CXY( parent_xp ); |
---|
1483 | parent_ptr = GET_PTR( parent_xp ); |
---|
1484 | |
---|
1485 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1486 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1487 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
1488 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1489 | printk("\n[%s] thread[%x,%x] parent inode <%s> is (%x,%x)\n", |
---|
1490 | __FUNCTION__, process->pid, this->trdid, parent_name, parent_cxy, parent_ptr ); |
---|
1491 | #endif |
---|
1492 | |
---|
1493 | // build extended pointer on parent inode "children" xhtab |
---|
1494 | xptr_t children_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
1495 | |
---|
1496 | // get extended pointer on dentry to unlink |
---|
1497 | dentry_xp = xhtab_lookup( children_xp , name ); |
---|
1498 | |
---|
1499 | if( dentry_xp == XPTR_NULL ) |
---|
1500 | { |
---|
1501 | remote_rwlock_wr_release( lock_xp ); |
---|
1502 | printk("\n[ERROR] in %s : cannot get target dentry <%s> in <%s>\n", |
---|
1503 | __FUNCTION__, name, path ); |
---|
1504 | return -1; |
---|
1505 | } |
---|
1506 | |
---|
1507 | // get local pointer on dentry to unlink |
---|
1508 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
1509 | |
---|
1510 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1511 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1512 | printk("\n[%s] thread[%x,%x] dentry <%s> to unlink is (%x,%x)\n", |
---|
1513 | __FUNCTION__, process->pid, this->trdid, name, parent_cxy, dentry_ptr ); |
---|
1514 | #endif |
---|
1515 | |
---|
1516 | // get pointer on target inode |
---|
1517 | inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) ); |
---|
1518 | inode_cxy = GET_CXY( inode_xp ); |
---|
1519 | inode_ptr = GET_PTR( inode_xp ); |
---|
1520 | |
---|
1521 | #if( DEBUG_VFS_UNLINK & 1 ) |
---|
1522 | char inode_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1523 | vfs_inode_get_name( inode_xp , inode_name ); |
---|
1524 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1525 | printk("\n[%s] thread[%x,%x] target inode <%s> is (%x,%x) / cycle %d\n", |
---|
1526 | __FUNCTION__, process->pid, this->trdid, inode_name, inode_cxy, inode_ptr, cycle ); |
---|
1527 | #endif |
---|
1528 | |
---|
1529 | // get target inode "type" and "links" |
---|
1530 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1531 | inode_links = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->links ) ); |
---|
1532 | |
---|
1533 | // check target inode links counter |
---|
1534 | assert( (inode_links >= 1), "illegal inode links count %d for <%s>\n", inode_links, path ); |
---|
1535 | |
---|
1536 | /////////////////////////////////////////////////////////////////////// |
---|
1537 | if( (inode_type == INODE_TYPE_FILE) || (inode_type == INODE_TYPE_DIR) ) |
---|
1538 | { |
---|
1539 | // 1. Release clusters allocated to target inode |
---|
1540 | // and synchronize the FAT on IOC device if last link. |
---|
1541 | if( inode_links == 1 ) |
---|
1542 | { |
---|
1543 | // build extended pointer on target inode "children" number |
---|
1544 | xptr_t inode_children_xp = XPTR( inode_cxy , &inode_ptr->children.items ); |
---|
1545 | |
---|
1546 | // get target inode number of children |
---|
1547 | inode_children = hal_remote_l32( inode_children_xp ); |
---|
1548 | |
---|
1549 | // check no children |
---|
1550 | if( inode_children != 0 ) |
---|
1551 | { |
---|
1552 | remote_rwlock_wr_release( lock_xp ); |
---|
1553 | printk("\n[ERROR] in %s : cannot remove <%s> inode that has children\n", |
---|
1554 | __FUNCTION__, path ); |
---|
1555 | return -1; |
---|
1556 | } |
---|
1557 | |
---|
1558 | // release clusters on IOC device |
---|
1559 | error = vfs_fs_release_inode( inode_xp ); |
---|
1560 | |
---|
1561 | if( error ) |
---|
1562 | { |
---|
1563 | remote_rwlock_wr_release( lock_xp ); |
---|
1564 | printk("\n[ERROR] in %s : cannot update FAT mapper to remove <%s> inode\n", |
---|
1565 | __FUNCTION__ , path ); |
---|
1566 | return -1; |
---|
1567 | } |
---|
1568 | |
---|
1569 | #if(DEBUG_VFS_UNLINK & 1) |
---|
1570 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1571 | printk("\n[%s] thread[%x,%x] removed <%s> inode from FAT (mapper and IOC device)\n", |
---|
1572 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
1573 | #endif |
---|
1574 | } |
---|
1575 | |
---|
1576 | // 2. update parent directory mapper |
---|
1577 | // and synchronize the parent directory on IOC device |
---|
1578 | if (parent_cxy == local_cxy) |
---|
1579 | { |
---|
1580 | error = vfs_fs_remove_dentry( parent_ptr, |
---|
1581 | dentry_ptr ); |
---|
1582 | } |
---|
1583 | else |
---|
1584 | { |
---|
1585 | rpc_vfs_fs_remove_dentry_client( parent_cxy, |
---|
1586 | parent_ptr, |
---|
1587 | dentry_ptr, |
---|
1588 | &error ); |
---|
1589 | } |
---|
1590 | |
---|
1591 | if( error ) |
---|
1592 | { |
---|
1593 | remote_rwlock_wr_release( lock_xp ); |
---|
1594 | printk("\n[ERROR] in %s : cannot update dentry on device for <%s>\n", |
---|
1595 | __FUNCTION__ , path ); |
---|
1596 | return -1; |
---|
1597 | } |
---|
1598 | |
---|
1599 | #if(DEBUG_VFS_UNLINK & 1) |
---|
1600 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1601 | printk("\n[%s] thread[%x,%x] removed <%s> inode from parent dir (mapper and IOC device)\n", |
---|
1602 | __FUNCTION__, process->pid, this->trdid, path ); |
---|
1603 | #endif |
---|
1604 | // 3. remove dentry from Inode Tree (and associated chils inode when last link) |
---|
1605 | vfs_remove_child_from_parent( dentry_xp ); |
---|
1606 | |
---|
1607 | // release the lock protecting Inode Tree |
---|
1608 | remote_rwlock_wr_release( lock_xp ); |
---|
1609 | |
---|
1610 | #if DEBUG_VFS_UNLINK |
---|
1611 | if( DEBUG_VFS_UNLINK < cycle ) |
---|
1612 | printk("\n[%s] thread[%x,%x] exit / removed <%s> inode from Inode Tree / cycle %d\n", |
---|
1613 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
1614 | #endif |
---|
1615 | return 0; |
---|
1616 | } |
---|
1617 | else |
---|
1618 | { |
---|
1619 | remote_rwlock_wr_release( lock_xp ); |
---|
1620 | printk("\n[ERROR] in %s : unsupported inode type %s\n", |
---|
1621 | __FUNCTION__ , vfs_inode_type_str( inode_type ) ); |
---|
1622 | return -1; |
---|
1623 | } |
---|
1624 | |
---|
1625 | } // end vfs_unlink() |
---|
1626 | |
---|
1627 | /////////////////////////////////////////// |
---|
1628 | error_t vfs_stat( xptr_t root_inode_xp, |
---|
1629 | char * path, |
---|
1630 | stat_t * st ) |
---|
1631 | { |
---|
1632 | error_t error; |
---|
1633 | xptr_t inode_xp; // extended pointer on target inode |
---|
1634 | vfs_inode_t * inode_ptr; // local pointer on target inode |
---|
1635 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1636 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1637 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
1638 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1639 | xptr_t lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1640 | |
---|
1641 | thread_t * this = CURRENT_THREAD; |
---|
1642 | process_t * process = this->process; |
---|
1643 | |
---|
1644 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1645 | vfs_root_xp = process->vfs_root_xp; |
---|
1646 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1647 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1648 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1649 | |
---|
1650 | // get the lock protecting Inode Tree in read mode |
---|
1651 | remote_rwlock_rd_acquire( lock_xp ); |
---|
1652 | |
---|
1653 | // get extended pointer on target inode |
---|
1654 | error = vfs_lookup( root_inode_xp, |
---|
1655 | path, |
---|
1656 | 0, |
---|
1657 | &inode_xp, |
---|
1658 | NULL ); |
---|
1659 | |
---|
1660 | // release the lock protecting Inode Tree |
---|
1661 | remote_rwlock_rd_release( lock_xp ); |
---|
1662 | |
---|
1663 | if( error ) |
---|
1664 | { |
---|
1665 | printk("\n[ERROR] in %s : cannot found inode <%s>\n", |
---|
1666 | __FUNCTION__ , path ); |
---|
1667 | return -1; |
---|
1668 | } |
---|
1669 | |
---|
1670 | // get cluster and local pointer on inode descriptor |
---|
1671 | inode_ptr = GET_PTR( inode_xp ); |
---|
1672 | inode_cxy = GET_CXY( inode_xp ); |
---|
1673 | |
---|
1674 | // get relevant infos from inode descriptor |
---|
1675 | uint32_t inum = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->inum ) ); |
---|
1676 | uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
1677 | uint32_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) ); |
---|
1678 | uint32_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) ); |
---|
1679 | uint32_t type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1680 | uint32_t rights = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->rights ) ); |
---|
1681 | |
---|
1682 | // set stat structure fields |
---|
1683 | st->st_ino = inum; |
---|
1684 | st->st_gid = gid; |
---|
1685 | st->st_uid = uid; |
---|
1686 | st->st_size = size; |
---|
1687 | st->st_mode = (type << 16) | rights; |
---|
1688 | |
---|
1689 | #if DEBUG_VFS_STAT |
---|
1690 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1691 | if( DEBUG_VFS_STAT < cycle ) |
---|
1692 | printk("\n[%s] thread[%x,%x] set stat %x for inode %x in cluster %x / cycle %d\n" |
---|
1693 | " %s / inum %d / size %d\n", |
---|
1694 | __FUNCTION__, process->pid, this->trdid, st, inode_ptr, inode_cxy, cycle, |
---|
1695 | vfs_inode_type_str( type ), inum, size ); |
---|
1696 | #endif |
---|
1697 | |
---|
1698 | return 0; |
---|
1699 | |
---|
1700 | } // end vfs_stat() |
---|
1701 | |
---|
1702 | ///////////////////////////////////////////// |
---|
1703 | error_t vfs_readdir( xptr_t file_xp, |
---|
1704 | struct dirent * k_dirent ) |
---|
1705 | { |
---|
1706 | assert( false , "not implemented file_xp: %x, k_dirent ptr %x\n", |
---|
1707 | file_xp, k_dirent ); |
---|
1708 | return 0; |
---|
1709 | } |
---|
1710 | |
---|
1711 | //////////////////////////////////// |
---|
1712 | error_t vfs_rmdir( xptr_t file_xp, |
---|
1713 | char * path ) |
---|
1714 | { |
---|
1715 | assert( false , "not implemented file_xp: %x, path <%s>\n", |
---|
1716 | file_xp, path ); |
---|
1717 | return 0; |
---|
1718 | } |
---|
1719 | |
---|
1720 | //////////////////////////////////// |
---|
1721 | error_t vfs_chdir( xptr_t root_xp, |
---|
1722 | char * path ) |
---|
1723 | { |
---|
1724 | error_t error; |
---|
1725 | xptr_t inode_xp; // extended pointer on target inode |
---|
1726 | cxy_t inode_cxy; // target inode cluster identifier |
---|
1727 | vfs_inode_t * inode_ptr; // target inode local pointer |
---|
1728 | vfs_inode_type_t inode_type; // target inode type |
---|
1729 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
1730 | vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode |
---|
1731 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
1732 | xptr_t main_lock_xp; // extended pointer on lock protecting Inode Tree |
---|
1733 | xptr_t ref_xp; // extended pointer on reference process |
---|
1734 | process_t * ref_ptr; // local pointer on reference process |
---|
1735 | cxy_t ref_cxy; // reference process cluster |
---|
1736 | xptr_t cwd_lock_xp; // extended pointer on lock protecting CWD change |
---|
1737 | xptr_t cwd_xp_xp; // extended pointer on cwd_xp in reference process |
---|
1738 | |
---|
1739 | thread_t * this = CURRENT_THREAD; |
---|
1740 | process_t * process = this->process; |
---|
1741 | |
---|
1742 | #if DEBUG_VFS_CHDIR |
---|
1743 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1744 | if( DEBUG_VFS_CHDIR < cycle ) |
---|
1745 | printk("\n[%s] thread[%x,%x] enter for path <%s> / cycle %d\n", |
---|
1746 | __FUNCTION__, process->pid, this->trdid, path, cycle ); |
---|
1747 | #endif |
---|
1748 | |
---|
1749 | // build extended pointer on lock protecting Inode Tree (in VFS root inode) |
---|
1750 | vfs_root_xp = process->vfs_root_xp; |
---|
1751 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
1752 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
1753 | main_lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
1754 | |
---|
1755 | // take lock protecting Inode Tree in read mode |
---|
1756 | remote_rwlock_rd_acquire( main_lock_xp ); |
---|
1757 | |
---|
1758 | // get extended pointer on target inode |
---|
1759 | error = vfs_lookup( root_xp, |
---|
1760 | path, |
---|
1761 | VFS_LOOKUP_DIR, |
---|
1762 | &inode_xp, |
---|
1763 | NULL ); |
---|
1764 | |
---|
1765 | // release lock protecting Inode Tree in read mode |
---|
1766 | remote_rwlock_rd_release( main_lock_xp ); |
---|
1767 | |
---|
1768 | if( error ) |
---|
1769 | { |
---|
1770 | printk("\n[ERROR] in %s : <%s> not found\n", |
---|
1771 | __FUNCTION__, path ); |
---|
1772 | return -1; |
---|
1773 | } |
---|
1774 | |
---|
1775 | // get inode type from remote file |
---|
1776 | inode_cxy = GET_CXY( inode_xp ); |
---|
1777 | inode_ptr = GET_PTR( inode_xp ); |
---|
1778 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1779 | |
---|
1780 | if( inode_type != INODE_TYPE_DIR ) |
---|
1781 | { |
---|
1782 | printk("\n[ERROR] in %s : <%s> is not a directory\n", |
---|
1783 | __FUNCTION__, path ); |
---|
1784 | return -1; |
---|
1785 | } |
---|
1786 | |
---|
1787 | // build extended pointer on cwd_lock and cwd_xp |
---|
1788 | ref_xp = process->ref_xp; |
---|
1789 | ref_ptr = GET_PTR( ref_xp ); |
---|
1790 | ref_cxy = GET_CXY( ref_xp ); |
---|
1791 | cwd_lock_xp = XPTR( ref_cxy , &ref_ptr->cwd_lock ); |
---|
1792 | cwd_xp_xp = XPTR( ref_cxy , &ref_ptr->cwd_xp ); |
---|
1793 | |
---|
1794 | // take lock protecting CWD changes |
---|
1795 | remote_busylock_acquire( cwd_lock_xp ); |
---|
1796 | |
---|
1797 | // update cwd_xp field in reference process descriptor |
---|
1798 | hal_remote_s64( cwd_xp_xp , inode_xp ); |
---|
1799 | |
---|
1800 | // release lock protecting CWD changes |
---|
1801 | remote_busylock_release( cwd_lock_xp ); |
---|
1802 | |
---|
1803 | #if DEBUG_VFS_CHDIR |
---|
1804 | cycle = (uint32_t)hal_get_cycles(); |
---|
1805 | if( DEBUG_VFS_CHDIR < cycle ) |
---|
1806 | printk("\n[%s] thread[%x,%x] exit : inode (%x,%x) / &cwd_xp (%x,%x) / cycle %d\n", |
---|
1807 | __FUNCTION__, process->pid, this->trdid, inode_cxy, inode_ptr, |
---|
1808 | GET_CXY(cwd_xp_xp), GET_PTR(cwd_xp_xp), cycle ); |
---|
1809 | #endif |
---|
1810 | |
---|
1811 | return 0; |
---|
1812 | |
---|
1813 | } // end vfs_chdir() |
---|
1814 | |
---|
1815 | /////////////////////////////////// |
---|
1816 | error_t vfs_chmod( xptr_t cwd_xp, |
---|
1817 | char * path, |
---|
1818 | uint32_t rights ) |
---|
1819 | { |
---|
1820 | error_t error; |
---|
1821 | xptr_t inode_xp; // extended pointer on target inode |
---|
1822 | cxy_t inode_cxy; // inode cluster identifier |
---|
1823 | vfs_inode_t * inode_ptr; // inode local pointer |
---|
1824 | vfs_inode_type_t inode_type; // target inode type |
---|
1825 | |
---|
1826 | // set lookup working mode |
---|
1827 | assert( (rights == 0), __FUNCTION__, |
---|
1828 | "access rights non implemented yet\n" ); |
---|
1829 | |
---|
1830 | // get extended pointer on target inode |
---|
1831 | error = vfs_lookup( cwd_xp, |
---|
1832 | path, |
---|
1833 | 0, |
---|
1834 | &inode_xp, |
---|
1835 | NULL ); |
---|
1836 | |
---|
1837 | if( error ) return error; |
---|
1838 | |
---|
1839 | // get inode cluster and local pointer |
---|
1840 | inode_cxy = GET_CXY( inode_xp ); |
---|
1841 | inode_ptr = GET_PTR( inode_xp ); |
---|
1842 | |
---|
1843 | // get inode type from remote inode |
---|
1844 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1845 | |
---|
1846 | // TODO implement this function |
---|
1847 | |
---|
1848 | assert( false , "not implemented\n" ); |
---|
1849 | |
---|
1850 | return 0; |
---|
1851 | } |
---|
1852 | |
---|
1853 | /////////////////////////////////// |
---|
1854 | error_t vfs_mkfifo( xptr_t cwd_xp, |
---|
1855 | char * path, |
---|
1856 | uint32_t rights ) |
---|
1857 | { |
---|
1858 | assert( false , "not implemented cwd_xp: %x, path <%s>, rights %x\n", |
---|
1859 | cwd_xp, path, rights ); |
---|
1860 | return 0; |
---|
1861 | } |
---|
1862 | |
---|
1863 | |
---|
1864 | |
---|
1865 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
1866 | // Distributed Inode Tree access related functions |
---|
1867 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
1868 | |
---|
1869 | ////////////////////////////////////////////////////////////////////////// |
---|
1870 | // This static function is called by the vfs_display() function. |
---|
1871 | // that is supposed to take the TXT0 lock. |
---|
1872 | ////////////////////////////////////////////////////////////////////////// |
---|
1873 | static void vfs_recursive_display( xptr_t inode_xp, |
---|
1874 | xptr_t name_xp, |
---|
1875 | uint32_t indent ) |
---|
1876 | { |
---|
1877 | cxy_t inode_cxy; |
---|
1878 | vfs_inode_t * inode_ptr; |
---|
1879 | vfs_inode_type_t inode_type; |
---|
1880 | uint32_t inode_size; |
---|
1881 | uint32_t inode_inum; |
---|
1882 | uint32_t inode_attr; |
---|
1883 | uint32_t inode_dirty; |
---|
1884 | xptr_t children_xp; // extended pointer on children xhtab |
---|
1885 | |
---|
1886 | xptr_t child_dentry_xp; |
---|
1887 | cxy_t child_dentry_cxy; |
---|
1888 | vfs_dentry_t * child_dentry_ptr; |
---|
1889 | xptr_t child_inode_xp; |
---|
1890 | xptr_t child_dentry_name_xp; |
---|
1891 | mapper_t * mapper_ptr; |
---|
1892 | |
---|
1893 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1894 | |
---|
1895 | char * indent_str[] = { "", // level 0 |
---|
1896 | " ", // level 1 |
---|
1897 | " ", // level 2 |
---|
1898 | " ", // level 3 |
---|
1899 | " ", // level 4 |
---|
1900 | " ", // level 5 |
---|
1901 | " ", // level 6 |
---|
1902 | " ", // level 7 |
---|
1903 | " ", // level 8 |
---|
1904 | " ", // level 9 |
---|
1905 | " ", // level 10 |
---|
1906 | " ", // level 11 |
---|
1907 | " ", // level 12 |
---|
1908 | " ", // level 13 |
---|
1909 | " ", // level 14 |
---|
1910 | " " }; // level 15 |
---|
1911 | |
---|
1912 | assert( (inode_xp != XPTR_NULL) , "inode_xp cannot be NULL\n" ); |
---|
1913 | assert( (name_xp != XPTR_NULL) , "name_xp cannot be NULL\n" ); |
---|
1914 | assert( (indent < 16) , "depth cannot be larger than 15\n" ); |
---|
1915 | |
---|
1916 | // get current inode cluster and local pointer |
---|
1917 | inode_cxy = GET_CXY( inode_xp ); |
---|
1918 | inode_ptr = GET_PTR( inode_xp ); |
---|
1919 | |
---|
1920 | // get inode type, size, attr, mapper, and inum |
---|
1921 | inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) ); |
---|
1922 | inode_size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) ); |
---|
1923 | inode_inum = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->inum ) ); |
---|
1924 | inode_attr = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->attr ) ); |
---|
1925 | mapper_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
1926 | |
---|
1927 | // make a local copy of node name |
---|
1928 | hal_remote_strcpy( XPTR( local_cxy , name ) , name_xp ); |
---|
1929 | |
---|
1930 | // compute dirty |
---|
1931 | inode_dirty = ((inode_attr & INODE_ATTR_DIRTY) != 0); |
---|
1932 | |
---|
1933 | // display inode |
---|
1934 | nolock_printk("%s%s <%s> : inum %d / %d bytes / dirty %d / cxy %x (inode %x / mapper %x)\n", |
---|
1935 | indent_str[indent], vfs_inode_type_str( inode_type ), name, |
---|
1936 | inode_inum, inode_size, inode_dirty, inode_cxy, inode_ptr, mapper_ptr ); |
---|
1937 | |
---|
1938 | // scan directory entries |
---|
1939 | if( inode_type == INODE_TYPE_DIR ) |
---|
1940 | { |
---|
1941 | // get extended pointer on directory entries xhtab |
---|
1942 | children_xp = XPTR( inode_cxy , &inode_ptr->children ); |
---|
1943 | |
---|
1944 | // get xhtab lock |
---|
1945 | xhtab_lock( children_xp ); |
---|
1946 | |
---|
1947 | // get first dentry from xhtab |
---|
1948 | child_dentry_xp = xhtab_get_first( children_xp ); |
---|
1949 | |
---|
1950 | while( child_dentry_xp != XPTR_NULL ) |
---|
1951 | { |
---|
1952 | // get dentry cluster and local pointer |
---|
1953 | child_dentry_cxy = GET_CXY( child_dentry_xp ); |
---|
1954 | child_dentry_ptr = GET_PTR( child_dentry_xp ); |
---|
1955 | |
---|
1956 | // get extended pointer on child inode |
---|
1957 | child_inode_xp = hal_remote_l64( XPTR( child_dentry_cxy, |
---|
1958 | &child_dentry_ptr->child_xp ) ); |
---|
1959 | |
---|
1960 | // get extended pointer on dentry name |
---|
1961 | child_dentry_name_xp = XPTR( child_dentry_cxy , &child_dentry_ptr->name ); |
---|
1962 | |
---|
1963 | // recursive call on inode display |
---|
1964 | vfs_recursive_display( child_inode_xp, |
---|
1965 | child_dentry_name_xp, |
---|
1966 | indent+1 ); |
---|
1967 | |
---|
1968 | // get next dentry |
---|
1969 | child_dentry_xp = xhtab_get_next( children_xp ); |
---|
1970 | } |
---|
1971 | |
---|
1972 | // release xhtab lock |
---|
1973 | xhtab_unlock( children_xp ); |
---|
1974 | } |
---|
1975 | } // end vfs_recursive_display() |
---|
1976 | |
---|
1977 | /////////////////////////////////// |
---|
1978 | void vfs_display( xptr_t inode_xp ) |
---|
1979 | { |
---|
1980 | xptr_t name_xp; |
---|
1981 | xptr_t dentry_xp; |
---|
1982 | cxy_t dentry_cxy; |
---|
1983 | vfs_dentry_t * dentry_ptr; |
---|
1984 | xptr_t parents_root_xp; // root of parent dentries xlist |
---|
1985 | |
---|
1986 | // get target inode cluster and local pointer |
---|
1987 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
1988 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
1989 | |
---|
1990 | // build extended pointer on parents dentries root |
---|
1991 | parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents ); |
---|
1992 | |
---|
1993 | // check VFS root |
---|
1994 | if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root |
---|
1995 | { |
---|
1996 | // build extended pointer on root name |
---|
1997 | name_xp = XPTR( local_cxy , "/" ); |
---|
1998 | } |
---|
1999 | else |
---|
2000 | { |
---|
2001 | // get first parent dentry cluster and pointers |
---|
2002 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
---|
2003 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
2004 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2005 | |
---|
2006 | // get extended pointer on dentry name |
---|
2007 | name_xp = XPTR( dentry_cxy , &dentry_ptr->name ); |
---|
2008 | } |
---|
2009 | |
---|
2010 | // get pointers on TXT0 chdev |
---|
2011 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
2012 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
2013 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
2014 | |
---|
2015 | // get extended pointer on remote TXT0 chdev lock |
---|
2016 | xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
2017 | |
---|
2018 | // get TXT0 lock in busy waiting mode |
---|
2019 | remote_busylock_acquire( lock_xp ); |
---|
2020 | |
---|
2021 | // print header |
---|
2022 | nolock_printk("\n***** file system state\n\n"); |
---|
2023 | |
---|
2024 | // call recursive function |
---|
2025 | vfs_recursive_display( inode_xp , name_xp , 0 ); |
---|
2026 | |
---|
2027 | // release lock |
---|
2028 | remote_busylock_release( lock_xp ); |
---|
2029 | |
---|
2030 | } // end vfs_display() |
---|
2031 | |
---|
2032 | /* |
---|
2033 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2034 | // This static function is used by the vfs_lookup() function. |
---|
2035 | // It takes an extended pointer on a remote inode (parent directory inode), |
---|
2036 | // and check access_rights violation for the calling thread. |
---|
2037 | // It can be used by any thread running in any cluster. |
---|
2038 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2039 | // @ inode_xp : extended pointer on inode. |
---|
2040 | // @ client_uid : client thread user ID |
---|
2041 | // @ client_gid : client thread group ID |
---|
2042 | // @ return true if access rights are violated. |
---|
2043 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2044 | static bool_t vfs_access_denied( xptr_t inode_xp, |
---|
2045 | uint32_t client_uid, |
---|
2046 | uint32_t client_gid ) |
---|
2047 | { |
---|
2048 | // get found inode cluster and local pointer |
---|
2049 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
2050 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
2051 | |
---|
2052 | // get inode access mode, UID, and GID |
---|
2053 | // TODO uint32_t mode = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->mode ) ); |
---|
2054 | uid_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) ); |
---|
2055 | gid_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) ); |
---|
2056 | |
---|
2057 | // FIXME : me must use mode |
---|
2058 | if( (uid == client_uid) || (gid == client_gid) ) return false; |
---|
2059 | else return true; |
---|
2060 | } |
---|
2061 | */ |
---|
2062 | |
---|
2063 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2064 | // This static function is used by the vfs_lookup() function. |
---|
2065 | // It takes an extended pointer on a remote parent directory inode, a directory |
---|
2066 | // entry name, and returns an extended pointer on the child inode. |
---|
2067 | // It can be used by any thread running in any cluster. |
---|
2068 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2069 | // @ parent_xp : extended pointer on parent inode in remote cluster. |
---|
2070 | // @ name : dentry name |
---|
2071 | // @ child_xp : [out] buffer for extended pointer on child inode. |
---|
2072 | // @ return true if success / return false if not found. |
---|
2073 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2074 | static bool_t vfs_get_child( xptr_t parent_xp, |
---|
2075 | char * name, |
---|
2076 | xptr_t * child_xp ) |
---|
2077 | { |
---|
2078 | xptr_t xhtab_xp; // extended pointer on hash table for children dentries |
---|
2079 | xptr_t dentry_xp; // extended pointer on children dentry |
---|
2080 | cxy_t dentry_cxy; |
---|
2081 | vfs_dentry_t * dentry_ptr; |
---|
2082 | |
---|
2083 | // get parent inode cluster and local pointer |
---|
2084 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
2085 | vfs_inode_t * parent_ptr = GET_PTR( parent_xp ); |
---|
2086 | |
---|
2087 | // get extended pointer on hash table of children directory entries |
---|
2088 | xhtab_xp = XPTR( parent_cxy , &parent_ptr->children ); |
---|
2089 | |
---|
2090 | // get pointers on matching dentry |
---|
2091 | dentry_xp = xhtab_lookup( xhtab_xp , name ); |
---|
2092 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
2093 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2094 | |
---|
2095 | if( dentry_xp == XPTR_NULL ) |
---|
2096 | { |
---|
2097 | return false; |
---|
2098 | } |
---|
2099 | else |
---|
2100 | { |
---|
2101 | *child_xp = (xptr_t)hal_remote_l64( XPTR( dentry_cxy , &dentry_ptr->child_xp ) ); |
---|
2102 | return true; |
---|
2103 | } |
---|
2104 | |
---|
2105 | } // end vfs_get_child() |
---|
2106 | |
---|
2107 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2108 | // This static function is used by the vfs_lookup() function. |
---|
2109 | // It takes the <current> pointer on a buffer containing a complete pathname, and return |
---|
2110 | // in the <name> buffer, allocated by the caller, a single name in the path. |
---|
2111 | // It return also in the <next> pointer the next character to analyse in the path. |
---|
2112 | // Finally it returns a <last> boolean, that is true when the returned <name> is the |
---|
2113 | // last name in the path. The names are supposed to be separated by one or several '/' |
---|
2114 | // characters, that are not written in the <name> buffer. |
---|
2115 | // |
---|
2116 | // WARNING: the leading characters '/' in the path are skiped before analysis. |
---|
2117 | // The path "/" identifies the VFS root, and is therefore anaysed as an empty |
---|
2118 | // string. This empty string is dignaled by the (-1) return value. |
---|
2119 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2120 | // @ current : pointer on first character to analyse in buffer containing the path. |
---|
2121 | // @ name : [out] pointer on buffer allocated by the caller for the returned name. |
---|
2122 | // @ next : [out] pointer on next character to analyse in buffer containing the path. |
---|
2123 | // @ last : [out] true if the returned name is the last (NUL character found). |
---|
2124 | // @ return 0 if success / return -1 if string empty (first chracter is NUL). |
---|
2125 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2126 | static error_t vfs_get_name_from_path( char * current, |
---|
2127 | char * name, |
---|
2128 | char ** next, |
---|
2129 | bool_t * last ) |
---|
2130 | { |
---|
2131 | char * ptr = current; |
---|
2132 | |
---|
2133 | // skip leading '/' characters |
---|
2134 | while( *ptr == '/' ) ptr++; |
---|
2135 | |
---|
2136 | // signal empty string |
---|
2137 | if( *ptr == 0 ) |
---|
2138 | { |
---|
2139 | *last = true; |
---|
2140 | return -1; |
---|
2141 | } |
---|
2142 | |
---|
2143 | // copy all characters in name until NUL or '/' |
---|
2144 | while( (*ptr != 0) && (*ptr !='/') ) *(name++) = *(ptr++); |
---|
2145 | |
---|
2146 | // set NUL terminating character in name buffer |
---|
2147 | *(name++) = 0; |
---|
2148 | |
---|
2149 | // return last an next |
---|
2150 | if( *ptr == 0 ) // last found character is NUL => last name in path |
---|
2151 | { |
---|
2152 | *last = true; |
---|
2153 | } |
---|
2154 | else // last found character is '/' => skip it |
---|
2155 | { |
---|
2156 | *last = false; |
---|
2157 | *next = ptr + 1; |
---|
2158 | } |
---|
2159 | |
---|
2160 | return 0; |
---|
2161 | |
---|
2162 | } // end vfs_get name_from_path() |
---|
2163 | |
---|
2164 | /////////////////////////////////////////////// |
---|
2165 | error_t vfs_lookup( xptr_t root_xp, |
---|
2166 | char * pathname, |
---|
2167 | uint32_t lookup_mode, |
---|
2168 | xptr_t * inode_xp, |
---|
2169 | char * last_name ) |
---|
2170 | { |
---|
2171 | char name[CONFIG_VFS_MAX_NAME_LENGTH]; // one name in path |
---|
2172 | |
---|
2173 | xptr_t parent_xp; // extended pointer on parent inode |
---|
2174 | cxy_t parent_cxy; // cluster for parent inode |
---|
2175 | vfs_inode_t * parent_ptr; // local pointer on parent inode |
---|
2176 | xptr_t dentry_xp; // extended pointer on dentry |
---|
2177 | xptr_t child_xp; // extended pointer on child inode |
---|
2178 | cxy_t child_cxy; // cluster for child inode |
---|
2179 | vfs_inode_t * child_ptr; // local pointer on child inode |
---|
2180 | vfs_inode_type_t child_type; // child inode type |
---|
2181 | vfs_fs_type_t fs_type; // File system type |
---|
2182 | vfs_ctx_t * ctx_ptr; // local pointer on FS context |
---|
2183 | char * current; // current pointer on path |
---|
2184 | char * next; // next value for current pointer |
---|
2185 | bool_t last; // true when the name is the last in path |
---|
2186 | bool_t found; // true when a child has been found |
---|
2187 | bool_t dir; // searched inode is a directory |
---|
2188 | bool_t create; // searched inode must be created if not found |
---|
2189 | bool_t excl; // searched inode must not exist |
---|
2190 | bool_t par; // searched inode is the parent |
---|
2191 | thread_t * this; // pointer on calling thread descriptor |
---|
2192 | process_t * process; // pointer on calling process descriptor |
---|
2193 | error_t error; |
---|
2194 | |
---|
2195 | this = CURRENT_THREAD; |
---|
2196 | process = this->process; |
---|
2197 | |
---|
2198 | // check pathname / root_xp consistency |
---|
2199 | assert( ((pathname[0] != '/') || (root_xp == process->vfs_root_xp)), |
---|
2200 | "root inode must be VFS root for path <%s>\n", pathname ); |
---|
2201 | |
---|
2202 | #if DEBUG_VFS_LOOKUP |
---|
2203 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2204 | char root_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2205 | vfs_inode_get_name( root_xp , root_name ); |
---|
2206 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2207 | printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / mode %x / cycle %d\n", |
---|
2208 | __FUNCTION__, process->pid, this->trdid, root_name, pathname, lookup_mode, cycle ); |
---|
2209 | #endif |
---|
2210 | |
---|
2211 | // compute lookup flags |
---|
2212 | dir = (lookup_mode & VFS_LOOKUP_DIR) == VFS_LOOKUP_DIR; |
---|
2213 | create = (lookup_mode & VFS_LOOKUP_CREATE) == VFS_LOOKUP_CREATE; |
---|
2214 | excl = (lookup_mode & VFS_LOOKUP_EXCL) == VFS_LOOKUP_EXCL; |
---|
2215 | par = (lookup_mode & VFS_LOOKUP_PARENT) == VFS_LOOKUP_PARENT; |
---|
2216 | |
---|
2217 | // initialise loop variables |
---|
2218 | parent_xp = root_xp; |
---|
2219 | current = pathname; |
---|
2220 | next = NULL; |
---|
2221 | last = false; |
---|
2222 | child_xp = XPTR_NULL; |
---|
2223 | |
---|
2224 | // loop on nodes in pathname |
---|
2225 | // load from device if one node in path not found in Inode Tree |
---|
2226 | // exit loop when last name found (i.e. last == true) |
---|
2227 | while( 1 ) |
---|
2228 | { |
---|
2229 | // get parent inode cluster and local pointer |
---|
2230 | parent_cxy = GET_CXY( parent_xp ); |
---|
2231 | parent_ptr = GET_PTR( parent_xp ); |
---|
2232 | |
---|
2233 | // get one "name" from path, and "last" flag |
---|
2234 | error = vfs_get_name_from_path( current , name , &next , &last ); |
---|
2235 | |
---|
2236 | // VFS root case |
---|
2237 | if ( error ) |
---|
2238 | { |
---|
2239 | |
---|
2240 | #if DEBUG_VFS_LOOKUP |
---|
2241 | cycle = (uint32_t)hal_get_cycles(); |
---|
2242 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2243 | printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n", |
---|
2244 | __FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle ); |
---|
2245 | #endif |
---|
2246 | *inode_xp = process->vfs_root_xp; |
---|
2247 | break; |
---|
2248 | } |
---|
2249 | |
---|
2250 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2251 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2252 | printk("\n[%s] thread[%x,%x] look for <%s> in <%s> / last = %d\n", |
---|
2253 | __FUNCTION__, process->pid, this->trdid, name, pathname, last ); |
---|
2254 | #endif |
---|
2255 | |
---|
2256 | // search the child dentry matching name in parent inode |
---|
2257 | found = vfs_get_child( parent_xp, |
---|
2258 | name, |
---|
2259 | &child_xp ); |
---|
2260 | |
---|
2261 | // analyse found & last, depending on lookup_mode |
---|
2262 | if( found == false ) // not found in Inode Tree |
---|
2263 | { |
---|
2264 | // when a inode is not found in the Inode Tree: |
---|
2265 | // - if (last and par) the Inode Tree is not modified |
---|
2266 | // - else we speculatively introduce a new (dentry/inode) in inode tree, |
---|
2267 | // and scan the parent directory mapper to initialise it. |
---|
2268 | // . if it is not found in the parent mapper: |
---|
2269 | // - if(last and create), a brand new file or directory is created |
---|
2270 | // - else, an error is reported |
---|
2271 | // . if it is found in parent mapper: |
---|
2272 | // - if( last and excl ), an error is reported |
---|
2273 | // - else the new child (inode & dentry) is initialised in Inode Tree |
---|
2274 | // - if the child is a directory, the child mapper is loaded from device |
---|
2275 | |
---|
2276 | if( last && par ) // does nothing |
---|
2277 | { |
---|
2278 | |
---|
2279 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2280 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2281 | printk("\n[%s] thread[%x,%x] child not found but only parent requested in <%s>\n", |
---|
2282 | __FUNCTION__, process->pid, this->trdid, pathname ); |
---|
2283 | #endif |
---|
2284 | } |
---|
2285 | else // try to get it from parent mapper |
---|
2286 | { |
---|
2287 | |
---|
2288 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2289 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2290 | printk("\n[%s] thread[%x,%x] miss <%s> inode in Inode Tree => build from parent mapper\n", |
---|
2291 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
2292 | #endif |
---|
2293 | // get parent inode FS type |
---|
2294 | ctx_ptr = hal_remote_lpt( XPTR( parent_cxy,&parent_ptr->ctx ) ); |
---|
2295 | fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) ); |
---|
2296 | |
---|
2297 | // select a cluster for new inode |
---|
2298 | child_cxy = cluster_random_select(); |
---|
2299 | |
---|
2300 | // define child inode type |
---|
2301 | if( dir ) child_type = INODE_TYPE_DIR; |
---|
2302 | else child_type = INODE_TYPE_FILE; |
---|
2303 | |
---|
2304 | // insert (speculatively) a new child dentry/inode in inode tree |
---|
2305 | error = vfs_add_child_in_parent( child_cxy, |
---|
2306 | child_type, |
---|
2307 | fs_type, |
---|
2308 | parent_xp, |
---|
2309 | name, |
---|
2310 | &dentry_xp, |
---|
2311 | &child_xp ); |
---|
2312 | if( error ) |
---|
2313 | { |
---|
2314 | printk("\n[ERROR] in %s : cannot create inode <%s> in path <%s>\n", |
---|
2315 | __FUNCTION__ , name, pathname ); |
---|
2316 | return -1; |
---|
2317 | } |
---|
2318 | |
---|
2319 | // get child inode local pointer |
---|
2320 | child_ptr = GET_PTR( child_xp ); |
---|
2321 | |
---|
2322 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2323 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2324 | printk("\n[%s] thread[%x,%x] created missing inode <%s> in cluster %x\n", |
---|
2325 | __FUNCTION__, process->pid, this->trdid, name, child_cxy ); |
---|
2326 | #endif |
---|
2327 | // scan parent mapper to find the missing dentry, and complete |
---|
2328 | // the initialisation of dentry and child inode desciptors |
---|
2329 | if( parent_cxy == local_cxy ) |
---|
2330 | |
---|
2331 | { |
---|
2332 | error = vfs_fs_child_init( parent_ptr, |
---|
2333 | name, |
---|
2334 | child_xp ); |
---|
2335 | } |
---|
2336 | else |
---|
2337 | { |
---|
2338 | rpc_vfs_fs_child_init_client( parent_cxy, |
---|
2339 | parent_ptr, |
---|
2340 | name, |
---|
2341 | child_xp, |
---|
2342 | &error ); |
---|
2343 | } |
---|
2344 | |
---|
2345 | if ( error ) // child not found in parent mapper |
---|
2346 | { |
---|
2347 | if ( last && create ) // add a brand new dentry in parent |
---|
2348 | { |
---|
2349 | error = vfs_new_child_init( parent_xp, |
---|
2350 | dentry_xp, |
---|
2351 | child_xp ); |
---|
2352 | if ( error ) |
---|
2353 | { |
---|
2354 | printk("\n[ERROR] in %s : cannot init inode <%s> in path <%s>\n", |
---|
2355 | __FUNCTION__, name, pathname ); |
---|
2356 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2357 | return -1; |
---|
2358 | } |
---|
2359 | |
---|
2360 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2361 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2362 | printk("\n[%s] thread[%x,%x] child <%s> not found in parent mapper => create it\n", |
---|
2363 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
2364 | #endif |
---|
2365 | } |
---|
2366 | else // not last or not create => error |
---|
2367 | { |
---|
2368 | printk("\n[ERROR] in %s : <%s> node not found in parent for <%s>\n", |
---|
2369 | __FUNCTION__ , name , pathname ); |
---|
2370 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2371 | return -1; |
---|
2372 | } |
---|
2373 | } |
---|
2374 | else // child has been found in parent mapper |
---|
2375 | { |
---|
2376 | // check the excl |
---|
2377 | if( last && create && excl ) |
---|
2378 | { |
---|
2379 | printk("\n[ERROR] in %s : node already exist <%s>\n", |
---|
2380 | __FUNCTION__, name ); |
---|
2381 | return -1; |
---|
2382 | } |
---|
2383 | |
---|
2384 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2385 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2386 | printk("\n[%s] thread[%x,%x] initialised inode <%s> from parent mapper\n", |
---|
2387 | __FUNCTION__, process->pid, this->trdid, name ); |
---|
2388 | #endif |
---|
2389 | // load child mapper from device if child is a directory (prefetch) |
---|
2390 | uint32_t type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) ); |
---|
2391 | if( type == INODE_TYPE_DIR ) |
---|
2392 | { |
---|
2393 | if( child_cxy == local_cxy ) |
---|
2394 | { |
---|
2395 | error = vfs_inode_load_all_pages( child_ptr ); |
---|
2396 | } |
---|
2397 | else |
---|
2398 | { |
---|
2399 | rpc_vfs_inode_load_all_pages_client( child_cxy, |
---|
2400 | child_ptr, |
---|
2401 | &error ); |
---|
2402 | } |
---|
2403 | if ( error ) |
---|
2404 | { |
---|
2405 | printk("\n[ERROR] in %s : cannot load <%s> from device\n", |
---|
2406 | __FUNCTION__ , name ); |
---|
2407 | vfs_remove_child_from_parent( dentry_xp ); |
---|
2408 | return -1; |
---|
2409 | } |
---|
2410 | |
---|
2411 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2412 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2413 | printk("\n[%s] thread[%x,%x] loaded directory mapper for <%s> from IOC\n", |
---|
2414 | __FUNCTION__ , process->pid, this->trdid, name ); |
---|
2415 | #endif |
---|
2416 | } |
---|
2417 | } |
---|
2418 | } |
---|
2419 | } |
---|
2420 | else // child directly found in inode tree |
---|
2421 | { |
---|
2422 | |
---|
2423 | #if (DEBUG_VFS_LOOKUP & 1) |
---|
2424 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2425 | printk("\n[%s] thread[%x,%x] found <%s> in Inode Tree / inode (%x,%x)\n", |
---|
2426 | __FUNCTION__, process->pid, this->trdid, name, GET_CXY(child_xp), GET_PTR(child_xp) ); |
---|
2427 | #endif |
---|
2428 | // get child inode local pointer and cluster |
---|
2429 | child_ptr = GET_PTR( child_xp ); |
---|
2430 | child_cxy = GET_CXY( child_xp ); |
---|
2431 | |
---|
2432 | // check the excl flag |
---|
2433 | if( last && create && excl ) |
---|
2434 | { |
---|
2435 | printk("\n[ERROR] in %s : node <%s> already exist\n", |
---|
2436 | __FUNCTION__, name ); |
---|
2437 | return -1; |
---|
2438 | } |
---|
2439 | } |
---|
2440 | |
---|
2441 | // TODO check access rights here [AG] |
---|
2442 | // error = vfs_access_denied( child_xp, |
---|
2443 | // client_uid, |
---|
2444 | // client_gid ); |
---|
2445 | // if( error ) |
---|
2446 | // { |
---|
2447 | // printk("\n[ERROR] in %s : thread %x / permission denied for %s\n", |
---|
2448 | // __FUNCTION__ , this , name ); |
---|
2449 | // return EACCES; |
---|
2450 | // } |
---|
2451 | |
---|
2452 | // take lock on child inode and release lock on parent |
---|
2453 | // vfs_inode_lock( child_xp ); |
---|
2454 | // vfs_inode_unlock( parent_xp ); |
---|
2455 | |
---|
2456 | // exit when last |
---|
2457 | if ( last ) // last inode in path => return relevant info |
---|
2458 | { |
---|
2459 | if ( par ) // return parent inode and child name |
---|
2460 | { |
---|
2461 | |
---|
2462 | #if DEBUG_VFS_LOOKUP |
---|
2463 | cycle = (uint32_t)hal_get_cycles(); |
---|
2464 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2465 | printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n", |
---|
2466 | __FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle ); |
---|
2467 | #endif |
---|
2468 | *inode_xp = parent_xp; |
---|
2469 | strcpy( last_name , name ); |
---|
2470 | break; |
---|
2471 | } |
---|
2472 | else // return child inode name |
---|
2473 | { |
---|
2474 | |
---|
2475 | #if DEBUG_VFS_LOOKUP |
---|
2476 | cycle = (uint32_t)hal_get_cycles(); |
---|
2477 | if( DEBUG_VFS_LOOKUP < cycle ) |
---|
2478 | printk("\n[%s] thread[%x,%x] exit / child inode (%x,%x) / <%s> / cycle %d\n", |
---|
2479 | __FUNCTION__ , process->pid, this->trdid, child_cxy, child_ptr, pathname, cycle ); |
---|
2480 | #endif |
---|
2481 | *inode_xp = child_xp; |
---|
2482 | break; |
---|
2483 | } |
---|
2484 | } |
---|
2485 | else // not the last inode in path => update loop variables |
---|
2486 | { |
---|
2487 | parent_xp = child_xp; |
---|
2488 | current = next; |
---|
2489 | } |
---|
2490 | } |
---|
2491 | |
---|
2492 | return 0; |
---|
2493 | |
---|
2494 | } // end vfs_lookup() |
---|
2495 | |
---|
2496 | /////////////////////////////////////////////// |
---|
2497 | error_t vfs_new_child_init( xptr_t parent_xp, |
---|
2498 | xptr_t dentry_xp, |
---|
2499 | xptr_t child_xp ) |
---|
2500 | { |
---|
2501 | error_t error; |
---|
2502 | uint32_t cluster; |
---|
2503 | uint32_t child_type; |
---|
2504 | uint32_t child_size; |
---|
2505 | |
---|
2506 | #if DEBUG_VFS_NEW_CHILD_INIT |
---|
2507 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2508 | char child_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2509 | vfs_inode_get_name( parent_xp , parent_name ); |
---|
2510 | vfs_inode_get_name( child_xp , child_name ); |
---|
2511 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2512 | thread_t * this = CURRENT_THREAD; |
---|
2513 | if( DEBUG_VFS_NEW_CHILD_INIT < cycle ) |
---|
2514 | printk("\n[%s] thread[%x,%x] enter / parent <%s> / child <%s> / cycle %d\n", |
---|
2515 | __FUNCTION__ , this->process->pid, this->trdid, parent_name, child_name, cycle ); |
---|
2516 | #endif |
---|
2517 | |
---|
2518 | // get parent inode cluster and local pointer |
---|
2519 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
2520 | vfs_inode_t * parent_ptr = GET_PTR( parent_xp ); |
---|
2521 | |
---|
2522 | // get dentry local pointer |
---|
2523 | vfs_dentry_t * dentry_ptr = GET_PTR( dentry_xp ); |
---|
2524 | |
---|
2525 | // get child inode cluster and local pointer |
---|
2526 | cxy_t child_cxy = GET_CXY( child_xp ); |
---|
2527 | vfs_inode_t * child_ptr = GET_PTR( child_xp ); |
---|
2528 | |
---|
2529 | // 1. allocate one free cluster to child inode |
---|
2530 | // depending on the child inode FS type |
---|
2531 | vfs_ctx_t * ctx = hal_remote_lpt( XPTR( child_cxy , &child_ptr->ctx ) ); |
---|
2532 | |
---|
2533 | error = vfs_fs_cluster_alloc( ctx->type, |
---|
2534 | &cluster ); |
---|
2535 | if ( error ) |
---|
2536 | { |
---|
2537 | printk("\n[ERROR] in %s : cannot find a free VFS cluster\n", |
---|
2538 | __FUNCTION__ ); |
---|
2539 | return -1; |
---|
2540 | } |
---|
2541 | |
---|
2542 | #if( DEBUG_VFS_NEW_CHILD_INIT & 1) |
---|
2543 | if( DEBUG_VFS_NEW_CHILD_INIT < cycle ) |
---|
2544 | printk("\n[%s] thread[%x,%x] allocated one FAT cluster to <%s>\n", |
---|
2545 | __FUNCTION__ , this->process->pid, this->trdid, child_name ); |
---|
2546 | #endif |
---|
2547 | |
---|
2548 | // 2. update the child inode descriptor |
---|
2549 | child_type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) ); |
---|
2550 | child_size = (child_type == INODE_TYPE_DIR) ? 4096 : 0; |
---|
2551 | |
---|
2552 | hal_remote_s32( XPTR( child_cxy , &child_ptr->size ) , child_size ); |
---|
2553 | hal_remote_spt( XPTR( child_cxy , &child_ptr->extend ) , (void*)(intptr_t)cluster ); |
---|
2554 | |
---|
2555 | // 3. update the parent inode mapper, and |
---|
2556 | // update the dentry extension if required |
---|
2557 | if( local_cxy == parent_cxy ) |
---|
2558 | { |
---|
2559 | error = vfs_fs_add_dentry( parent_ptr, |
---|
2560 | dentry_ptr ); |
---|
2561 | } |
---|
2562 | else |
---|
2563 | { |
---|
2564 | rpc_vfs_fs_add_dentry_client( parent_cxy, |
---|
2565 | parent_ptr, |
---|
2566 | dentry_ptr, |
---|
2567 | &error ); |
---|
2568 | } |
---|
2569 | if ( error ) |
---|
2570 | { |
---|
2571 | printk("\n[ERROR] in %s : cannot register child in parent directory\n", |
---|
2572 | __FUNCTION__ ); |
---|
2573 | return -1; |
---|
2574 | } |
---|
2575 | |
---|
2576 | #if DEBUG_VFS_NEW_CHILD_INIT |
---|
2577 | cycle = (uint32_t)hal_get_cycles(); |
---|
2578 | if( DEBUG_VFS_NEW_CHILD_INIT < cycle ) |
---|
2579 | printk("\n[%s] thread[%x,%x] exit / parent <%s> / child <%s> / cycle %d\n", |
---|
2580 | __FUNCTION__ , this->process->pid, this->trdid, parent_name, child_name, cycle ); |
---|
2581 | #endif |
---|
2582 | |
---|
2583 | return 0; |
---|
2584 | |
---|
2585 | } // end vfs_new_child_init() |
---|
2586 | |
---|
2587 | ////////////////////////////////////////// |
---|
2588 | error_t vfs_get_path( xptr_t inode_xp, |
---|
2589 | char * buffer, |
---|
2590 | char ** first, |
---|
2591 | uint32_t max_size ) |
---|
2592 | { |
---|
2593 | xptr_t dentry_xp; // extended pointer on current dentry |
---|
2594 | vfs_dentry_t * dentry_ptr; // local pointer on current dentry |
---|
2595 | cxy_t dentry_cxy; // current dentry cluster identifier |
---|
2596 | xptr_t name_xp; // extended pointer on current dentry name |
---|
2597 | uint32_t length; // length of current dentry name |
---|
2598 | int32_t index; // slot index in buffer |
---|
2599 | xptr_t current_xp; // extended pointer on current inode |
---|
2600 | vfs_inode_t * current_ptr; // local pointer on current inode |
---|
2601 | cxy_t current_cxy; // current inode cluster identifier |
---|
2602 | xptr_t vfs_root_xp; // extended pointer on VFS root inode |
---|
2603 | vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode |
---|
2604 | cxy_t vfs_root_cxy; // VFS root inode cluster identifier |
---|
2605 | xptr_t lock_xp; // extended pointer on Inode Tree lock |
---|
2606 | xptr_t parents_root_xp; // extended pointer on current inode parents root |
---|
2607 | bool_t found; // condition to exit the while loop |
---|
2608 | |
---|
2609 | thread_t * this = CURRENT_THREAD; |
---|
2610 | process_t * process = this->process; |
---|
2611 | |
---|
2612 | #if DEBUG_VFS_GET_PATH |
---|
2613 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2614 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
2615 | printk("\n[%s] thread[%x,%x] enter : inode (%x,%x) / cycle %d\n", |
---|
2616 | __FUNCTION__ , process->pid, this->trdid, |
---|
2617 | GET_CXY( inode_xp ), GET_PTR( inode_xp ), cycle ); |
---|
2618 | #endif |
---|
2619 | |
---|
2620 | // set the NUL character in buffer / initialise buffer index |
---|
2621 | buffer[max_size - 1] = 0; |
---|
2622 | index = (int32_t)(max_size - 1); |
---|
2623 | |
---|
2624 | // initialize current inode |
---|
2625 | current_xp = inode_xp; |
---|
2626 | |
---|
2627 | // build extended pointer on lock protecting Inode Tree |
---|
2628 | vfs_root_xp = process->vfs_root_xp; |
---|
2629 | vfs_root_ptr = GET_PTR( vfs_root_xp ); |
---|
2630 | vfs_root_cxy = GET_CXY( vfs_root_xp ); |
---|
2631 | lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock ); |
---|
2632 | |
---|
2633 | // take lock protecting Inode Tree in read mode |
---|
2634 | remote_rwlock_rd_acquire( lock_xp ); |
---|
2635 | |
---|
2636 | // traverse Inode Tree from target inode to VFS root |
---|
2637 | // selecting always the first parent dentry |
---|
2638 | // the buffer is written in "reverse order" (from target inode to root) |
---|
2639 | // exit the while loop when the VFS root has been found |
---|
2640 | do |
---|
2641 | { |
---|
2642 | // get current inode cluster and local pointer |
---|
2643 | current_cxy = GET_CXY( current_xp ); |
---|
2644 | current_ptr = GET_PTR( current_xp ); |
---|
2645 | |
---|
2646 | // build extended pointer on parents dentries root |
---|
2647 | parents_root_xp = XPTR( current_cxy , ¤t_ptr->parents ); |
---|
2648 | |
---|
2649 | // compute exit condition <=> current inode is VFS root |
---|
2650 | found = xlist_is_empty( parents_root_xp ); |
---|
2651 | |
---|
2652 | if( found ) // parent is the VFS root |
---|
2653 | { |
---|
2654 | if( index == (int32_t)(max_size - 1) ) |
---|
2655 | { |
---|
2656 | // update index |
---|
2657 | index--; |
---|
2658 | |
---|
2659 | // set separator |
---|
2660 | buffer[index] = '/'; |
---|
2661 | |
---|
2662 | // check buffer overflow |
---|
2663 | assert( (index >= 0) , "kernel buffer too small\n" ); |
---|
2664 | |
---|
2665 | } |
---|
2666 | } |
---|
2667 | else // not the VFS root |
---|
2668 | { |
---|
2669 | // get first parent dentry cluster and pointers |
---|
2670 | dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents ); |
---|
2671 | dentry_cxy = GET_CXY( dentry_xp ); |
---|
2672 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2673 | |
---|
2674 | // get extended pointer on dentry name and name length |
---|
2675 | name_xp = XPTR( dentry_cxy , dentry_ptr->name ); |
---|
2676 | length = hal_remote_l32( XPTR( dentry_cxy , &dentry_ptr->length ) ); |
---|
2677 | |
---|
2678 | #if (DEBUG_VFS_GET_PATH & 1) |
---|
2679 | char debug_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2680 | hal_remote_strcpy( XPTR( local_cxy , debug_name ) , name_xp ); |
---|
2681 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
2682 | printk("\n[%s] thread(%x,%s) get current dentry <%s> in cluster %x\n", |
---|
2683 | __FUNCTION__ , process->pid, this->trdid, debug_name, current_cxy ); |
---|
2684 | #endif |
---|
2685 | // update index |
---|
2686 | index -= (length + 1); |
---|
2687 | |
---|
2688 | // check buffer overflow |
---|
2689 | assert( (index >= 0) , "kernel buffer too small\n" ); |
---|
2690 | |
---|
2691 | // update pathname |
---|
2692 | hal_remote_memcpy( XPTR( local_cxy , &buffer[index + 1] ) , |
---|
2693 | name_xp , length ); |
---|
2694 | |
---|
2695 | // set separator |
---|
2696 | buffer[index] = '/'; |
---|
2697 | |
---|
2698 | // get extended pointer on parent inode |
---|
2699 | current_xp = XPTR( dentry_cxy , |
---|
2700 | hal_remote_lpt( XPTR( dentry_cxy , &dentry_ptr->parent ) ) ); |
---|
2701 | } |
---|
2702 | } |
---|
2703 | while( found == false ); |
---|
2704 | |
---|
2705 | // release lock protecting Inode Tree in read mode |
---|
2706 | remote_rwlock_rd_release( lock_xp ); |
---|
2707 | |
---|
2708 | #if DEBUG_VFS_GET_PATH |
---|
2709 | cycle = (uint32_t)hal_get_cycles(); |
---|
2710 | if( DEBUG_VFS_GET_PATH < cycle ) |
---|
2711 | printk("\n[%s] thread[%x,%x] exit : path <%s> / cycle %d\n", |
---|
2712 | __FUNCTION__ , process->pid, this->trdid, &buffer[index], cycle ); |
---|
2713 | #endif |
---|
2714 | |
---|
2715 | // return pointer on first character in buffer |
---|
2716 | *first = &buffer[index]; |
---|
2717 | return 0; |
---|
2718 | |
---|
2719 | } // end vfs_get_path() |
---|
2720 | |
---|
2721 | |
---|
2722 | //////////////////////////////////////////////////////////////////// |
---|
2723 | error_t vfs_add_child_in_parent( cxy_t child_cxy, |
---|
2724 | vfs_inode_type_t child_type, |
---|
2725 | vfs_fs_type_t fs_type, |
---|
2726 | xptr_t parent_inode_xp, |
---|
2727 | char * name, |
---|
2728 | xptr_t * child_dentry_xp, |
---|
2729 | xptr_t * child_inode_xp ) |
---|
2730 | { |
---|
2731 | error_t error; |
---|
2732 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
2733 | vfs_inode_t * parent_inode_ptr; // parent inode local pointer |
---|
2734 | xptr_t new_dentry_xp; // extended pointer on created dentry |
---|
2735 | vfs_dentry_t * new_dentry_ptr; // created dentry local pointer |
---|
2736 | xptr_t new_inode_xp; // extended pointer on created child inode |
---|
2737 | vfs_inode_t * new_inode_ptr; // local pointer on created child inode |
---|
2738 | |
---|
2739 | xptr_t parents_root_xp; // extended pointer on child inode "parents" field |
---|
2740 | xptr_t parents_entry_xp; // extended pointer on child dentry "parents" field |
---|
2741 | xptr_t children_xhtab_xp; // extended pointer on parent inode "children" field |
---|
2742 | xptr_t children_entry_xp; // extended pointer on child dentry "children" field |
---|
2743 | |
---|
2744 | // get parent inode cluster and pointer |
---|
2745 | parent_cxy = GET_CXY( parent_inode_xp ); |
---|
2746 | parent_inode_ptr = GET_PTR( parent_inode_xp ); |
---|
2747 | |
---|
2748 | #if DEBUG_VFS_ADD_CHILD |
---|
2749 | char parent_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2750 | vfs_inode_get_name( parent_inode_xp , parent_name ); |
---|
2751 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2752 | thread_t * this = CURRENT_THREAD; |
---|
2753 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
2754 | printk("\n[%s] thread[%x,%x] enter / child <%s> / parent <%s> / cycle %d\n", |
---|
2755 | __FUNCTION__, this->process->pid, this->trdid, name, |
---|
2756 | parent_name, (uint32_t)hal_get_cycles() ); |
---|
2757 | #endif |
---|
2758 | |
---|
2759 | // 1. create dentry in parent cluster |
---|
2760 | if( parent_cxy == local_cxy ) // parent cluster is local |
---|
2761 | { |
---|
2762 | error = vfs_dentry_create( fs_type, |
---|
2763 | name, |
---|
2764 | &new_dentry_xp ); |
---|
2765 | } |
---|
2766 | else // parent cluster is remote |
---|
2767 | { |
---|
2768 | rpc_vfs_dentry_create_client( parent_cxy, |
---|
2769 | fs_type, |
---|
2770 | name, |
---|
2771 | &new_dentry_xp, |
---|
2772 | &error ); |
---|
2773 | } |
---|
2774 | |
---|
2775 | if( error ) |
---|
2776 | { |
---|
2777 | printk("\n[ERROR] in %s : cannot create dentry <%s> in cluster %x\n", |
---|
2778 | __FUNCTION__ , name , parent_cxy ); |
---|
2779 | return -1; |
---|
2780 | } |
---|
2781 | |
---|
2782 | // get dentry local pointer |
---|
2783 | new_dentry_ptr = GET_PTR( new_dentry_xp ); |
---|
2784 | |
---|
2785 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
2786 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
2787 | printk("\n[%s] thread[%x,%x] / dentry <%s> created (%x,%x)\n", |
---|
2788 | __FUNCTION__, this->process->pid, this->trdid, name, parent_cxy, new_dentry_ptr ); |
---|
2789 | #endif |
---|
2790 | |
---|
2791 | // 2. create child inode in child cluster |
---|
2792 | // TODO : define attr / mode / uid / gid |
---|
2793 | uint32_t attr = 0; |
---|
2794 | uint32_t mode = 0; |
---|
2795 | uint32_t uid = 0; |
---|
2796 | uint32_t gid = 0; |
---|
2797 | |
---|
2798 | if( child_cxy == local_cxy ) // child cluster is local |
---|
2799 | { |
---|
2800 | error = vfs_inode_create( fs_type, |
---|
2801 | child_type, |
---|
2802 | attr, |
---|
2803 | mode, |
---|
2804 | uid, |
---|
2805 | gid, |
---|
2806 | &new_inode_xp ); |
---|
2807 | } |
---|
2808 | else // child cluster is remote |
---|
2809 | { |
---|
2810 | rpc_vfs_inode_create_client( child_cxy, |
---|
2811 | fs_type, |
---|
2812 | child_type, |
---|
2813 | attr, |
---|
2814 | mode, |
---|
2815 | uid, |
---|
2816 | gid, |
---|
2817 | &new_inode_xp, |
---|
2818 | &error ); |
---|
2819 | } |
---|
2820 | |
---|
2821 | if( error ) |
---|
2822 | { |
---|
2823 | printk("\n[ERROR] in %s : cannot create inode in cluster %x\n", |
---|
2824 | __FUNCTION__ , child_cxy ); |
---|
2825 | |
---|
2826 | if( parent_cxy == local_cxy ) vfs_dentry_destroy( new_dentry_ptr ); |
---|
2827 | else rpc_vfs_dentry_destroy_client( parent_cxy , new_dentry_ptr ); |
---|
2828 | return -1; |
---|
2829 | } |
---|
2830 | |
---|
2831 | // get new inode local pointer |
---|
2832 | new_inode_ptr = GET_PTR( new_inode_xp ); |
---|
2833 | |
---|
2834 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
2835 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
2836 | printk("\n[%s] thread[%x,%x] / inode <%s> created (%x,%x)\n", |
---|
2837 | __FUNCTION__ , this->process->pid, this->trdid, name , child_cxy, new_inode_ptr ); |
---|
2838 | #endif |
---|
2839 | |
---|
2840 | // 3. register new_dentry in new_inode xlist of parents |
---|
2841 | parents_root_xp = XPTR( child_cxy , &new_inode_ptr->parents ); |
---|
2842 | parents_entry_xp = XPTR( parent_cxy, &new_dentry_ptr->parents ); |
---|
2843 | xlist_add_first( parents_root_xp , parents_entry_xp ); |
---|
2844 | hal_remote_atomic_add( XPTR( child_cxy , &new_inode_ptr->links ) , 1 ); |
---|
2845 | |
---|
2846 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
2847 | if( local_cxy == 1 ) |
---|
2848 | // if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
2849 | printk("\n[%s] thread[%x,%x] / dentry (%x,%x) registered in child inode (%x,%x)\n", |
---|
2850 | __FUNCTION__, this->process->pid, this->trdid, |
---|
2851 | parent_cxy, new_dentry_ptr, child_cxy, new_inode_ptr ); |
---|
2852 | #endif |
---|
2853 | |
---|
2854 | // 4. register new_dentry in parent_inode xhtab of children |
---|
2855 | children_xhtab_xp = XPTR( parent_cxy , &parent_inode_ptr->children ); |
---|
2856 | children_entry_xp = XPTR( parent_cxy , &new_dentry_ptr->children ); |
---|
2857 | xhtab_insert( children_xhtab_xp , name , children_entry_xp ); |
---|
2858 | |
---|
2859 | #if(DEBUG_VFS_ADD_CHILD & 1) |
---|
2860 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
2861 | printk("\n[%s] thread[%x,%x] / dentry (%x,%x) registered in parent inode (%x,%x)\n", |
---|
2862 | __FUNCTION__, this->process->pid, this->trdid, |
---|
2863 | parent_cxy, new_dentry_ptr, parent_cxy, parent_inode_ptr ); |
---|
2864 | #endif |
---|
2865 | |
---|
2866 | // 5. update "parent" and "child_xp" fields in new_dentry |
---|
2867 | hal_remote_s64( XPTR( parent_cxy , &new_dentry_ptr->child_xp ) , new_inode_xp ); |
---|
2868 | hal_remote_spt( XPTR( parent_cxy , &new_dentry_ptr->parent ) , parent_inode_ptr ); |
---|
2869 | |
---|
2870 | #if DEBUG_VFS_ADD_CHILD |
---|
2871 | cycle = (uint32_t)hal_get_cycles(); |
---|
2872 | if( DEBUG_VFS_ADD_CHILD < cycle ) |
---|
2873 | printk("\n[%s] thread[%x,%x] exit for <%s> / cycle %d\n", |
---|
2874 | __FUNCTION__, this->process->pid, this->trdid, name, (uint32_t)hal_get_cycles() ); |
---|
2875 | #endif |
---|
2876 | |
---|
2877 | // return extended pointer on dentry & child inode |
---|
2878 | *child_dentry_xp = new_dentry_xp; |
---|
2879 | *child_inode_xp = new_inode_xp; |
---|
2880 | return 0; |
---|
2881 | |
---|
2882 | } // end vfs_add_child_in_parent() |
---|
2883 | |
---|
2884 | ///////////////////////////////////////////////////// |
---|
2885 | void vfs_remove_child_from_parent( xptr_t dentry_xp ) |
---|
2886 | { |
---|
2887 | cxy_t parent_cxy; // parent inode cluster identifier |
---|
2888 | cxy_t child_cxy; // child inode cluster identifier |
---|
2889 | vfs_dentry_t * dentry_ptr; // local pointer on dentry |
---|
2890 | xptr_t child_inode_xp; // extended pointer on child inode |
---|
2891 | vfs_inode_t * child_inode_ptr; // local pointer on child inode |
---|
2892 | vfs_inode_t * parent_inode_ptr; // local pointer on parent inode |
---|
2893 | uint32_t links; // number of child inode parents |
---|
2894 | |
---|
2895 | char dentry_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
2896 | |
---|
2897 | // get parent cluster and dentry local pointer |
---|
2898 | parent_cxy = GET_CXY( dentry_xp ); |
---|
2899 | dentry_ptr = GET_PTR( dentry_xp ); |
---|
2900 | |
---|
2901 | // get a local copy of dentry name |
---|
2902 | hal_remote_strcpy( XPTR( local_cxy , dentry_name ), |
---|
2903 | XPTR( parent_cxy , &dentry_ptr->name ) ); |
---|
2904 | |
---|
2905 | // get parent_inode local pointer |
---|
2906 | parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy , &dentry_ptr->parent ) ); |
---|
2907 | |
---|
2908 | // get child cluster and child_inode pointers |
---|
2909 | child_inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) ); |
---|
2910 | child_cxy = GET_CXY( child_inode_xp ); |
---|
2911 | child_inode_ptr = GET_PTR( child_inode_xp ); |
---|
2912 | |
---|
2913 | // remove dentry from parent_inode |
---|
2914 | xhtab_remove( XPTR( parent_cxy , &parent_inode_ptr->children ), |
---|
2915 | dentry_name, |
---|
2916 | XPTR( parent_cxy , &dentry_ptr->children ) ); |
---|
2917 | |
---|
2918 | // remove dentry from child_inode |
---|
2919 | xlist_unlink( XPTR( parent_cxy , &dentry_ptr->parents ) ); |
---|
2920 | links = hal_remote_atomic_add( XPTR( child_cxy , &child_inode_ptr->links ) , -1 ); |
---|
2921 | |
---|
2922 | // delete dentry descriptor |
---|
2923 | if( parent_cxy == local_cxy ) |
---|
2924 | { |
---|
2925 | vfs_dentry_destroy( dentry_ptr ); |
---|
2926 | } |
---|
2927 | else |
---|
2928 | { |
---|
2929 | rpc_vfs_dentry_destroy_client( parent_cxy, |
---|
2930 | dentry_ptr ); |
---|
2931 | } |
---|
2932 | |
---|
2933 | // delete child_inode descriptor if last link |
---|
2934 | if( links == 1 ) |
---|
2935 | { |
---|
2936 | if( child_cxy == local_cxy ) |
---|
2937 | { |
---|
2938 | vfs_inode_destroy( child_inode_ptr ); |
---|
2939 | } |
---|
2940 | else |
---|
2941 | { |
---|
2942 | rpc_vfs_inode_destroy_client( child_cxy , child_inode_ptr ); |
---|
2943 | } |
---|
2944 | } |
---|
2945 | |
---|
2946 | } // end vfs_remove_child_from_parent() |
---|
2947 | |
---|
2948 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2949 | // API used by VFS to access a specific FS |
---|
2950 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
2951 | |
---|
2952 | /////////////////////////////////////////// |
---|
2953 | error_t vfs_fs_move_page( xptr_t page_xp, |
---|
2954 | bool_t to_mapper ) |
---|
2955 | { |
---|
2956 | error_t error = 0; |
---|
2957 | |
---|
2958 | assert( (page_xp != XPTR_NULL) , "page pointer is NULL\n" ); |
---|
2959 | |
---|
2960 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
2961 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
2962 | |
---|
2963 | // get local pointer on page mapper |
---|
2964 | mapper_t * mapper = hal_remote_lpt( XPTR( page_cxy , &page_ptr->mapper ) ); |
---|
2965 | |
---|
2966 | assert( (mapper != NULL) , "no mapper for page\n" ); |
---|
2967 | |
---|
2968 | // get FS type |
---|
2969 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( page_cxy , &mapper->type ) ); |
---|
2970 | |
---|
2971 | // call relevant FS function |
---|
2972 | if( fs_type == FS_TYPE_FATFS ) |
---|
2973 | { |
---|
2974 | error = fatfs_move_page( page_xp , to_mapper ); |
---|
2975 | } |
---|
2976 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
2977 | { |
---|
2978 | assert( false , "should not be called for RAMFS\n" ); |
---|
2979 | } |
---|
2980 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
2981 | { |
---|
2982 | assert( false , "should not be called for DEVFS\n" ); |
---|
2983 | } |
---|
2984 | else |
---|
2985 | { |
---|
2986 | assert( false , "undefined file system type\n" ); |
---|
2987 | } |
---|
2988 | |
---|
2989 | return error; |
---|
2990 | |
---|
2991 | } // end vfs_fs_move_page() |
---|
2992 | |
---|
2993 | //////////////////////////////////////////////// |
---|
2994 | error_t vfs_fs_add_dentry( vfs_inode_t * inode, |
---|
2995 | vfs_dentry_t * dentry ) |
---|
2996 | { |
---|
2997 | error_t error = 0; |
---|
2998 | |
---|
2999 | assert( (inode != NULL) , "inode pointer is NULL\n" ); |
---|
3000 | assert( (dentry != NULL) , "dentry pointer is NULL\n" ); |
---|
3001 | |
---|
3002 | mapper_t * mapper = inode->mapper; |
---|
3003 | |
---|
3004 | assert( (mapper != NULL) , "mapper pointer is NULL\n" ); |
---|
3005 | |
---|
3006 | // get FS type |
---|
3007 | vfs_fs_type_t fs_type = mapper->type; |
---|
3008 | |
---|
3009 | // call relevant FS function |
---|
3010 | if( fs_type == FS_TYPE_FATFS ) |
---|
3011 | { |
---|
3012 | error = fatfs_add_dentry( inode , dentry ); |
---|
3013 | } |
---|
3014 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3015 | { |
---|
3016 | assert( false , "should not be called for RAMFS\n" ); |
---|
3017 | } |
---|
3018 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3019 | { |
---|
3020 | assert( false , "should not be called for DEVFS\n" ); |
---|
3021 | } |
---|
3022 | else |
---|
3023 | { |
---|
3024 | assert( false , "undefined file system type\n" ); |
---|
3025 | } |
---|
3026 | |
---|
3027 | return error; |
---|
3028 | |
---|
3029 | } // end vfs_fs_add_dentry() |
---|
3030 | |
---|
3031 | /////////////////////////////////////////////////// |
---|
3032 | error_t vfs_fs_remove_dentry( vfs_inode_t * inode, |
---|
3033 | vfs_dentry_t * dentry ) |
---|
3034 | { |
---|
3035 | error_t error = 0; |
---|
3036 | |
---|
3037 | assert( (inode != NULL) , "inode pointer is NULL\n" ); |
---|
3038 | assert( (dentry != NULL) , "dentry pointer is NULL\n" ); |
---|
3039 | |
---|
3040 | mapper_t * mapper = inode->mapper; |
---|
3041 | |
---|
3042 | assert( (mapper != NULL) , "mapper pointer is NULL\n" ); |
---|
3043 | |
---|
3044 | // get FS type |
---|
3045 | vfs_fs_type_t fs_type = mapper->type; |
---|
3046 | |
---|
3047 | // call relevant FS function |
---|
3048 | if( fs_type == FS_TYPE_FATFS ) |
---|
3049 | { |
---|
3050 | error = fatfs_remove_dentry( inode , dentry ); |
---|
3051 | } |
---|
3052 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3053 | { |
---|
3054 | assert( false , "should not be called for RAMFS\n" ); |
---|
3055 | } |
---|
3056 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3057 | { |
---|
3058 | assert( false , "should not be called for DEVFS\n" ); |
---|
3059 | } |
---|
3060 | else |
---|
3061 | { |
---|
3062 | assert( false , "undefined file system type\n" ); |
---|
3063 | } |
---|
3064 | |
---|
3065 | return error; |
---|
3066 | |
---|
3067 | } // end vfs_fs_remove_dentry() |
---|
3068 | |
---|
3069 | //////////////////////////////////////////////// |
---|
3070 | error_t vfs_fs_child_init( vfs_inode_t * parent, |
---|
3071 | char * name, |
---|
3072 | xptr_t child_xp ) |
---|
3073 | { |
---|
3074 | error_t error = 0; |
---|
3075 | |
---|
3076 | // check arguments |
---|
3077 | assert( (parent != NULL) , "parent pointer is NULL\n"); |
---|
3078 | assert( (child_xp != XPTR_NULL) , "child pointer is NULL\n"); |
---|
3079 | |
---|
3080 | // get parent inode FS type |
---|
3081 | vfs_fs_type_t fs_type = parent->ctx->type; |
---|
3082 | |
---|
3083 | // call relevant FS function |
---|
3084 | if( fs_type == FS_TYPE_FATFS ) |
---|
3085 | { |
---|
3086 | error = fatfs_child_init( parent , name , child_xp ); |
---|
3087 | } |
---|
3088 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3089 | { |
---|
3090 | assert( false , "should not be called for RAMFS\n" ); |
---|
3091 | } |
---|
3092 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3093 | { |
---|
3094 | assert( false , "should not be called for DEVFS\n" ); |
---|
3095 | } |
---|
3096 | else |
---|
3097 | { |
---|
3098 | assert( false , "undefined file system type\n" ); |
---|
3099 | } |
---|
3100 | |
---|
3101 | return error; |
---|
3102 | |
---|
3103 | } // end vfs_fs_child_init() |
---|
3104 | |
---|
3105 | //////////////////////////////////////////////// |
---|
3106 | error_t vfs_fs_sync_inode( vfs_inode_t * inode ) |
---|
3107 | { |
---|
3108 | error_t error = 0; |
---|
3109 | |
---|
3110 | // check arguments |
---|
3111 | assert( (inode != NULL) , "inode pointer is NULL\n"); |
---|
3112 | |
---|
3113 | // get inode FS type |
---|
3114 | vfs_fs_type_t fs_type = inode->ctx->type; |
---|
3115 | |
---|
3116 | // call relevant FS function |
---|
3117 | if( fs_type == FS_TYPE_FATFS ) |
---|
3118 | { |
---|
3119 | error = fatfs_sync_inode( inode ); |
---|
3120 | } |
---|
3121 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3122 | { |
---|
3123 | assert( false , "should not be called for RAMFS\n" ); |
---|
3124 | } |
---|
3125 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3126 | { |
---|
3127 | assert( false , "should not be called for DEVFS\n" ); |
---|
3128 | } |
---|
3129 | else |
---|
3130 | { |
---|
3131 | assert( false , "undefined file system type\n" ); |
---|
3132 | } |
---|
3133 | |
---|
3134 | return error; |
---|
3135 | |
---|
3136 | } // end vfs_fs_sync_inode() |
---|
3137 | |
---|
3138 | //////////////////////////////////////////////// |
---|
3139 | error_t vfs_fs_sync_fat( vfs_fs_type_t fs_type ) |
---|
3140 | { |
---|
3141 | error_t error = 0; |
---|
3142 | |
---|
3143 | // call relevant FS function |
---|
3144 | if( fs_type == FS_TYPE_FATFS ) |
---|
3145 | { |
---|
3146 | error = fatfs_sync_fat(); |
---|
3147 | } |
---|
3148 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3149 | { |
---|
3150 | assert( false , "should not be called for RAMFS\n" ); |
---|
3151 | } |
---|
3152 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3153 | { |
---|
3154 | assert( false , "should not be called for DEVFS\n" ); |
---|
3155 | } |
---|
3156 | else |
---|
3157 | { |
---|
3158 | assert( false , "undefined file system type\n" ); |
---|
3159 | } |
---|
3160 | |
---|
3161 | return error; |
---|
3162 | |
---|
3163 | } // end vfs_fs_sync_fat() |
---|
3164 | |
---|
3165 | ////////////////////////////////////////////////////// |
---|
3166 | error_t vfs_fs_sync_free_info( vfs_fs_type_t fs_type ) |
---|
3167 | { |
---|
3168 | error_t error = 0; |
---|
3169 | |
---|
3170 | // call relevant FS function |
---|
3171 | if( fs_type == FS_TYPE_FATFS ) |
---|
3172 | { |
---|
3173 | error = fatfs_sync_free_info(); |
---|
3174 | } |
---|
3175 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3176 | { |
---|
3177 | assert( false , "should not be called for RAMFS\n" ); |
---|
3178 | } |
---|
3179 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3180 | { |
---|
3181 | assert( false , "should not be called for DEVFS\n" ); |
---|
3182 | } |
---|
3183 | else |
---|
3184 | { |
---|
3185 | assert( false , "undefined file system type\n" ); |
---|
3186 | } |
---|
3187 | |
---|
3188 | return error; |
---|
3189 | |
---|
3190 | } // end vfs_fs_sync_fat() |
---|
3191 | |
---|
3192 | ///////////////////////////////////////////////// |
---|
3193 | error_t vfs_fs_cluster_alloc( uint32_t fs_type, |
---|
3194 | uint32_t * cluster ) |
---|
3195 | { |
---|
3196 | error_t error = 0; |
---|
3197 | |
---|
3198 | // call relevant FS function |
---|
3199 | if( fs_type == FS_TYPE_FATFS ) |
---|
3200 | { |
---|
3201 | error = fatfs_cluster_alloc( cluster ); |
---|
3202 | } |
---|
3203 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3204 | { |
---|
3205 | assert( false , "should not be called for RAMFS\n" ); |
---|
3206 | } |
---|
3207 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3208 | { |
---|
3209 | assert( false , "should not be called for DEVFS\n" ); |
---|
3210 | } |
---|
3211 | else |
---|
3212 | { |
---|
3213 | assert( false , "undefined file system type\n" ); |
---|
3214 | } |
---|
3215 | |
---|
3216 | return error; |
---|
3217 | |
---|
3218 | } // end vfs_fs_alloc_cluster() |
---|
3219 | |
---|
3220 | //////////////////////////////////////////////// |
---|
3221 | error_t vfs_fs_release_inode( xptr_t inode_xp ) |
---|
3222 | { |
---|
3223 | error_t error = 0; |
---|
3224 | |
---|
3225 | assert( (inode_xp != XPTR_NULL) , "inode pointer is NULL\n") |
---|
3226 | |
---|
3227 | vfs_inode_t * inode_ptr = GET_PTR( inode_xp ); |
---|
3228 | cxy_t inode_cxy = GET_CXY( inode_xp ); |
---|
3229 | |
---|
3230 | // get local pointer on page mapper |
---|
3231 | mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
---|
3232 | |
---|
3233 | assert( (mapper != NULL) , "mapper pointer is NULL\n") |
---|
3234 | |
---|
3235 | // get FS type from mapper |
---|
3236 | vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->type ) ); |
---|
3237 | |
---|
3238 | // call relevant FS function |
---|
3239 | if( fs_type == FS_TYPE_FATFS ) |
---|
3240 | { |
---|
3241 | error = fatfs_release_inode( inode_xp ); |
---|
3242 | } |
---|
3243 | else if( fs_type == FS_TYPE_RAMFS ) |
---|
3244 | { |
---|
3245 | assert( false , "should not be called for RAMFS\n" ); |
---|
3246 | } |
---|
3247 | else if( fs_type == FS_TYPE_DEVFS ) |
---|
3248 | { |
---|
3249 | assert( false , "should not be called for DEVFS\n" ); |
---|
3250 | } |
---|
3251 | else |
---|
3252 | { |
---|
3253 | assert( false , "undefined file system type\n" ); |
---|
3254 | } |
---|
3255 | |
---|
3256 | return error; |
---|
3257 | |
---|
3258 | } // end vfs_fs_release_inode() |
---|
3259 | |
---|
3260 | |
---|