1 | /* |
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2 | * sys_display.c - display the current state of a kernel structure on TXT0 |
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3 | * |
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4 | * Author Alain Greiner (2016,2017,2018,2019,2020) |
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5 | * |
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6 | * Copyright (c) UPMC Sorbonne Universites |
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7 | * |
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8 | * This file is part of ALMOS-MKH. |
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9 | * |
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10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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11 | * under the terms of the GNU General Public License as published by |
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12 | * the Free Software Foundation; version 2.0 of the License. |
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13 | * |
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14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |
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24 | #include <hal_kernel_types.h> |
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25 | #include <hal_uspace.h> |
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26 | #include <hal_vmm.h> |
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27 | #include <errno.h> |
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28 | #include <vmm.h> |
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29 | #include <cluster.h> |
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30 | #include <thread.h> |
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31 | #include <process.h> |
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32 | #include <string.h> |
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33 | #include <shared_syscalls.h> |
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34 | #include <remote_barrier.h> |
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35 | #include <vfs.h> |
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36 | #include <mapper.h> |
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37 | #include <ksocket.h> |
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38 | #include <syscalls.h> |
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39 | |
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40 | ///////////////////////////////////////////////////////////////////////////////// |
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41 | // This static function returns a printable string for the type of display. |
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42 | ///////////////////////////////////////////////////////////////////////////////// |
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43 | |
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44 | #if DEBUG_SYS_DISPLAY |
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45 | static char* display_type_str( uint32_t type ) |
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46 | { |
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47 | if ( type == DISPLAY_STRING ) return "STRING"; |
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48 | else if( type == DISPLAY_VMM ) return "VMM"; |
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49 | else if( type == DISPLAY_SCHED ) return "SCHED"; |
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50 | else if( type == DISPLAY_CLUSTER_PROCESSES ) return "CLUSTER_PROCESSES"; |
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51 | else if( type == DISPLAY_VFS ) return "VFS"; |
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52 | else if( type == DISPLAY_CHDEV ) return "CHDEV"; |
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53 | else if( type == DISPLAY_TXT_PROCESSES ) return "TXT_PROCESSES"; |
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54 | else if( type == DISPLAY_DQDT ) return "DQDT"; |
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55 | else if( type == DISPLAY_BUSYLOCKS ) return "BUSYLOCKS"; |
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56 | else if( type == DISPLAY_MAPPER ) return "MAPPER"; |
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57 | else if( type == DISPLAY_BARRIER ) return "BARRIER"; |
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58 | else if( type == DISPLAY_FAT ) return "FAT"; |
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59 | else if( type == DISPLAY_SOCKET ) return "SOCKET"; |
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60 | else return "undefined"; |
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61 | } |
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62 | #endif |
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63 | |
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64 | ///////////////////////////// |
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65 | int sys_display( reg_t type, |
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66 | reg_t arg0, |
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67 | reg_t arg1, |
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68 | reg_t arg2 ) |
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69 | { |
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70 | |
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71 | error_t error; |
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72 | vseg_t * vseg; |
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73 | |
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74 | thread_t * this = CURRENT_THREAD; |
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75 | process_t * process = this->process; |
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76 | |
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77 | #if (DEBUG_SYS_DISPLAY || CONFIG_INSTRUMENTATION_SYSCALLS) |
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78 | uint64_t tm_start = hal_get_cycles(); |
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79 | #endif |
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80 | |
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81 | #if DEBUG_SYS_DISPLAY |
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82 | tm_start = hal_get_cycles(); |
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83 | if( DEBUG_SYS_DISPLAY < tm_start ) |
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84 | printk("\n[%s] thread[%x,%x] enter / type %s / arg0 %x / arg1 %x / arg2 %x / cycle = %d\n", |
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85 | __FUNCTION__, process->pid, this->trdid, display_type_str(type), |
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86 | (uint32_t)arg0, (uint32_t)arg1, (uint32_t)arg2, (uint32_t)tm_start ); |
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87 | #endif |
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88 | |
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89 | switch( type ) |
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90 | { |
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91 | //////////////////// |
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92 | case DISPLAY_STRING: |
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93 | { |
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94 | char kbuf[512]; |
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95 | uint32_t length; |
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96 | |
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97 | char * string = (char *)arg0; |
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98 | |
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99 | // check string in user space |
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100 | error = vmm_get_vseg( process , (intptr_t)arg0 , &vseg ); |
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101 | if( error ) |
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102 | { |
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103 | |
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104 | #if DEBUG_SYSCALLS_ERROR |
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105 | printk("\n[ERROR] in %s for STRING : string buffer %x unmapped\n", |
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106 | __FUNCTION__ , (intptr_t)arg0 ); |
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107 | #endif |
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108 | this->errno = EINVAL; |
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109 | return -1; |
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110 | } |
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111 | |
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112 | // ckeck string length |
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113 | length = hal_strlen_from_uspace( string ); |
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114 | if( length >= 512 ) |
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115 | { |
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116 | |
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117 | #if DEBUG_SYSCALLS_ERROR |
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118 | printk("\n[ERROR] in %s STRING : string length %d too large\n", |
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119 | __FUNCTION__ , length ); |
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120 | #endif |
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121 | this->errno = EINVAL; |
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122 | return -1; |
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123 | } |
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124 | |
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125 | // copy string to kernel space |
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126 | hal_strcpy_from_uspace( XPTR( local_cxy , kbuf ), |
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127 | string, |
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128 | 512 ); |
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129 | |
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130 | // print message on TXT0 kernel terminal |
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131 | printk("\n%s / cycle %d\n", kbuf, (uint32_t)hal_get_cycles() ); |
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132 | |
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133 | break; |
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134 | } |
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135 | ///////////////// |
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136 | case DISPLAY_VMM: |
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137 | { |
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138 | cxy_t cxy = (cxy_t)arg0; |
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139 | pid_t pid = (pid_t)arg1; |
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140 | bool_t mapping = (arg2 != 0); |
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141 | |
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142 | // check cxy argument |
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143 | if( cluster_is_active( cxy ) == false ) |
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144 | { |
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145 | |
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146 | #if DEBUG_SYSCALLS_ERROR |
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147 | printk("\n[ERROR] in %s VMM : process %x in cluster %x not found\n", |
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148 | __FUNCTION__ , pid , cxy ); |
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149 | #endif |
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150 | this->errno = EINVAL; |
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151 | return -1; |
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152 | } |
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153 | |
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154 | // get extended pointer on process PID in cluster CXY |
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155 | xptr_t process_xp = cluster_get_process_from_pid_in_cxy( cxy , pid ); |
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156 | if( process_xp == XPTR_NULL ) |
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157 | { |
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158 | |
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159 | #if DEBUG_SYSCALLS_ERROR |
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160 | printk("\n[ERROR] in %s VMM : process %x in cluster %x not found\n", |
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161 | __FUNCTION__ , pid , cxy ); |
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162 | #endif |
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163 | this->errno = EINVAL; |
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164 | return -1; |
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165 | } |
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166 | |
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167 | // call kernel function |
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168 | hal_vmm_display( process_xp , mapping ); |
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169 | |
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170 | break; |
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171 | } |
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172 | /////////////////// |
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173 | case DISPLAY_SCHED: |
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174 | { |
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175 | cxy_t cxy = (cxy_t)arg0; |
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176 | lid_t lid = (lid_t)arg1; |
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177 | |
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178 | // check cxy argument |
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179 | if( cluster_is_active( cxy ) == false ) |
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180 | { |
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181 | |
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182 | #if DEBUG_SYSCALLS_ERROR |
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183 | printk("\n[ERROR] in %s SCHED : illegal cxy argument %x\n", |
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184 | __FUNCTION__ , cxy ); |
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185 | #endif |
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186 | this->errno = EINVAL; |
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187 | return -1; |
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188 | } |
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189 | |
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190 | // check lid argument |
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191 | if( lid >= LOCAL_CLUSTER->cores_nr ) |
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192 | { |
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193 | |
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194 | #if DEBUG_SYSCALLS_ERROR |
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195 | printk("\n[ERROR] in %s SCHED : illegal lid argument %x\n", |
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196 | __FUNCTION__ , lid ); |
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197 | #endif |
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198 | this->errno = EINVAL; |
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199 | return -1; |
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200 | } |
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201 | |
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202 | // call kernel function |
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203 | sched_remote_display( cxy , lid ); |
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204 | |
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205 | break; |
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206 | } |
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207 | /////////////////////////////// |
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208 | case DISPLAY_CLUSTER_PROCESSES: |
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209 | { |
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210 | cxy_t cxy = (cxy_t)arg0; |
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211 | bool_t owned = (bool_t)arg1; |
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212 | |
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213 | // check cxy argument |
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214 | if( cluster_is_active( cxy ) == false ) |
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215 | { |
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216 | |
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217 | #if DEBUG_SYSCALLS_ERROR |
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218 | printk("\n[ERROR] in %s CLUSTER_PROCESSES : illegal cxy argument %x\n", |
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219 | __FUNCTION__ , cxy ); |
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220 | #endif |
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221 | this->errno = EINVAL; |
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222 | return -1; |
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223 | } |
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224 | |
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225 | cluster_processes_display( cxy , owned ); |
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226 | |
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227 | break; |
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228 | } |
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229 | ///////////////// |
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230 | case DISPLAY_VFS: |
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231 | { |
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232 | vfs_display( process->vfs_root_xp ); |
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233 | |
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234 | break; |
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235 | } |
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236 | /////////////////// |
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237 | case DISPLAY_CHDEV: |
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238 | { |
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239 | chdev_dir_display(); |
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240 | |
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241 | break; |
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242 | } |
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243 | /////////////////////////// |
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244 | case DISPLAY_TXT_PROCESSES: |
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245 | { |
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246 | uint32_t txt_id = (uint32_t)arg0; |
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247 | |
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248 | // check argument |
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249 | if( txt_id >= LOCAL_CLUSTER->nb_txt_channels ) |
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250 | { |
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251 | |
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252 | #if DEBUG_SYSCALLS_ERROR |
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253 | printk("\n[ERROR] in %s TXT_PROCESSES : illegal txt_id argument %d\n", |
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254 | __FUNCTION__ , txt_id ); |
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255 | #endif |
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256 | this->errno = EINVAL; |
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257 | return -1; |
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258 | } |
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259 | |
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260 | process_txt_display( txt_id ); |
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261 | |
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262 | break; |
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263 | } |
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264 | ////////////////// |
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265 | case DISPLAY_DQDT: |
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266 | { |
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267 | dqdt_display(); |
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268 | |
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269 | break; |
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270 | } |
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271 | /////////////////////// |
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272 | case DISPLAY_BUSYLOCKS: |
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273 | { |
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274 | pid_t pid = (pid_t)arg0; |
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275 | trdid_t trdid = (trdid_t)arg1; |
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276 | |
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277 | // get extended pointer on target thread |
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278 | xptr_t thread_xp = thread_get_xptr( pid , trdid ); |
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279 | |
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280 | if( thread_xp == XPTR_NULL ) |
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281 | { |
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282 | |
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283 | #if DEBUG_SYSCALLS_ERROR |
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284 | printk("\n[ERROR] in %s BUSYLOCKS : thread[%x,%x] not found\n", |
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285 | __FUNCTION__ , pid, trdid ); |
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286 | #endif |
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287 | this->errno = EINVAL; |
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288 | return -1; |
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289 | } |
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290 | |
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291 | thread_display_busylocks( thread_xp , __FUNCTION__ ); |
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292 | |
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293 | break; |
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294 | } |
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295 | //////////////////// |
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296 | case DISPLAY_MAPPER: |
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297 | { |
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298 | xptr_t root_inode_xp; |
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299 | xptr_t inode_xp; |
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300 | cxy_t inode_cxy; |
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301 | vfs_inode_t * inode_ptr; |
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302 | xptr_t mapper_xp; |
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303 | mapper_t * mapper_ptr; |
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304 | xptr_t page_xp; |
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305 | |
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306 | char kbuf[CONFIG_VFS_MAX_PATH_LENGTH]; |
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307 | |
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308 | char * path = (char *)arg0; |
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309 | uint32_t page_id = (uint32_t)arg1; |
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310 | uint32_t nbytes = (uint32_t)arg2; |
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311 | |
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312 | // check pathname length |
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313 | if( hal_strlen_from_uspace( path ) >= CONFIG_VFS_MAX_PATH_LENGTH ) |
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314 | { |
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315 | |
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316 | #if DEBUG_SYSCALLS_ERROR |
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317 | printk("\n[ERROR] in %s MAPPER : pathname too long\n", |
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318 | __FUNCTION__ ); |
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319 | #endif |
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320 | this->errno = EINVAL; |
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321 | return -1; |
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322 | } |
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323 | |
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324 | // check nbytes |
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325 | if( nbytes >= 4096 ) |
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326 | { |
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327 | |
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328 | #if DEBUG_SYSCALLS_ERROR |
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329 | printk("\n[ERROR] in %s MAPPER : nbytes cannot be larger than 4096\n", |
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330 | __FUNCTION__ ); |
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331 | #endif |
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332 | this->errno = EINVAL; |
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333 | return -1; |
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334 | } |
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335 | |
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336 | // copy pathname in kernel space |
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337 | hal_strcpy_from_uspace( XPTR( local_cxy , kbuf ), |
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338 | path, |
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339 | CONFIG_VFS_MAX_PATH_LENGTH ); |
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340 | |
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341 | // compute root inode for pathname |
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342 | if( kbuf[0] == '/' ) // absolute path |
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343 | { |
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344 | // use extended pointer on VFS root inode |
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345 | root_inode_xp = process->vfs_root_xp; |
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346 | } |
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347 | else // relative path |
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348 | { |
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349 | // get cluster and local pointer on reference process |
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350 | xptr_t ref_xp = process->ref_xp; |
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351 | process_t * ref_ptr = (process_t *)GET_PTR( ref_xp ); |
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352 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
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353 | |
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354 | // get extended pointer on CWD inode |
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355 | root_inode_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->cwd_xp ) ); |
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356 | } |
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357 | |
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358 | // get extended pointer on target inode |
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359 | error = vfs_lookup( root_inode_xp, |
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360 | kbuf, |
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361 | 0, |
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362 | &inode_xp, |
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363 | NULL ); |
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364 | if( error ) |
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365 | { |
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366 | |
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367 | #if DEBUG_SYSCALLS_ERROR |
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368 | printk("\n[ERROR] in %s for MAPPER : cannot found inode <%s>\n", |
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369 | __FUNCTION__ , kbuf ); |
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370 | #endif |
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371 | this->errno = ENFILE; |
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372 | return -1; |
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373 | } |
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374 | |
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375 | // get target inode cluster and local pointer |
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376 | inode_cxy = GET_CXY( inode_xp ); |
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377 | inode_ptr = GET_PTR( inode_xp ); |
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378 | |
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379 | // get extended pointer on target mapper |
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380 | mapper_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) ); |
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381 | mapper_xp = XPTR( inode_cxy , mapper_ptr ); |
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382 | |
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383 | // get extended pointer on target page |
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384 | page_xp = mapper_get_page( mapper_xp , page_id ); |
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385 | |
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386 | if( page_xp == XPTR_NULL ) |
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387 | { |
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388 | |
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389 | #if DEBUG_SYSCALLS_ERROR |
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390 | printk("\n[ERROR] in %s MAPPER : cannot get page %d\n", |
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391 | __FUNCTION__ , page_id ); |
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392 | #endif |
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393 | this->errno = ENFILE; |
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394 | return -1; |
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395 | } |
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396 | |
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397 | // display mapper |
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398 | mapper_display_page( mapper_xp , page_xp , nbytes ); |
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399 | |
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400 | |
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401 | break; |
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402 | } |
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403 | ///////////////////// |
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404 | case DISPLAY_BARRIER: |
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405 | { |
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406 | // get target process PID |
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407 | pid_t pid = (pid_t)arg0; |
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408 | |
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409 | // get pointers on owner process |
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410 | xptr_t process_xp = cluster_get_reference_process_from_pid( pid ); |
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411 | process_t * process_ptr = GET_PTR( process_xp ); |
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412 | cxy_t process_cxy = GET_CXY( process_xp ); |
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413 | |
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414 | if( process_xp == XPTR_NULL ) |
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415 | { |
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416 | |
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417 | #if DEBUG_SYSCALLS_ERROR |
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418 | printk("\n[ERROR] in %s BARRIER : process %x not found\n", |
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419 | __FUNCTION__ , pid ); |
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420 | #endif |
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421 | this->errno = EINVAL; |
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422 | return -1; |
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423 | } |
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424 | |
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425 | // get extended pointer on root of list of barriers |
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426 | xptr_t root_xp = XPTR( process_cxy , &process_ptr->barrier_root ); |
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427 | |
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428 | if( xlist_is_empty( root_xp ) ) |
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429 | { |
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430 | |
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431 | #if DEBUG_SYSCALLS_ERROR |
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432 | printk("\n[ERROR] in %s BARRIER : no registered barrier in process %x\n", |
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433 | __FUNCTION__ , pid ); |
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434 | #endif |
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435 | this->errno = EINVAL; |
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436 | return -1; |
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437 | } |
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438 | |
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439 | // get extended pointer on first registered generic barrier descriptor |
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440 | xptr_t gen_barrier_xp = XLIST_FIRST( root_xp , generic_barrier_t , list ); |
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441 | |
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442 | // display barrier state |
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443 | generic_barrier_display( gen_barrier_xp ); |
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444 | |
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445 | break; |
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446 | } |
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447 | ///////////////// |
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448 | case DISPLAY_FAT: |
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449 | { |
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450 | uint32_t slots = (uint32_t)arg1; |
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451 | |
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452 | if( slots > 1024 ) |
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453 | { |
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454 | |
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455 | #if DEBUG_SYSCALLS_ERROR |
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456 | printk("\n[ERROR] in %s FAT : nb_slots larger than 1024\n", |
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457 | __FUNCTION__ ); |
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458 | #endif |
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459 | this->errno = EINVAL; |
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460 | return -1; |
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461 | } |
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462 | |
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463 | if( slots == 0 ) // display fat context in cluster cxy |
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464 | { |
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465 | uint32_t cxy = (uint32_t)arg0; |
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466 | |
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467 | if( cluster_is_active( cxy ) == false ) |
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468 | { |
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469 | |
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470 | #if DEBUG_SYSCALLS_ERROR |
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471 | printk("\n[ERROR] in %s FAT : illegal cxy argument %x\n", |
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472 | __FUNCTION__ , cxy ); |
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473 | #endif |
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474 | this->errno = EINVAL; |
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475 | return -1; |
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476 | } |
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477 | |
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478 | fatfs_display_ctx( cxy ); |
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479 | } |
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480 | else // display nb_slots in page |
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481 | { |
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482 | uint32_t min = (uint32_t)arg0; |
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483 | |
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484 | fatfs_display_fat( min , slots ); |
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485 | } |
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486 | |
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487 | break; |
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488 | } |
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489 | //////////////////// |
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490 | case DISPLAY_SOCKET: |
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491 | { |
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492 | pid_t pid = (pid_t)arg0; |
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493 | trdid_t fdid = (trdid_t)arg1; |
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494 | |
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495 | // get extended pointer on owner process descriptor |
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496 | xptr_t owner_xp = cluster_get_owner_process_from_pid( pid ); |
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497 | |
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498 | if( owner_xp == XPTR_NULL ) |
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499 | { |
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500 | |
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501 | #if DEBUG_SYSCALLS_ERROR |
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502 | printk("\n[ERROR] in %s SOCKET : pid %x not found\n", __FUNCTION__ , pid ); |
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503 | #endif |
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504 | this->errno = EINVAL; |
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505 | return -1; |
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506 | } |
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507 | |
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508 | // get extended pointer on file descriptor |
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509 | xptr_t file_xp = process_fd_get_xptr_from_owner( owner_xp , fdid ); |
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510 | |
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511 | if( file_xp == XPTR_NULL ) |
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512 | { |
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513 | |
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514 | #if DEBUG_SYSCALLS_ERROR |
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515 | printk("\n[ERROR] in %s SOCKET : fdid %d not found\n", __FUNCTION__ , fdid ); |
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516 | #endif |
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517 | this->errno = EINVAL; |
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518 | return -1; |
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519 | } |
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520 | |
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521 | // get local pointer and cluster for file |
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522 | vfs_file_t * file_ptr = GET_PTR( file_xp ); |
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523 | cxy_t file_cxy = GET_CXY( file_xp ); |
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524 | |
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525 | // get local pointer on socket descriptor |
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526 | socket_t * socket = hal_remote_lpt( XPTR( file_cxy , &file_ptr->socket ) ); |
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527 | |
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528 | // display socket descriptor on TXT0 |
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529 | socket_display( XPTR( file_cxy , socket ), NULL ); |
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530 | |
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531 | break; |
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532 | } |
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533 | //////// |
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534 | default: |
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535 | { |
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536 | |
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537 | #if DEBUG_SYSCALLS_ERROR |
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538 | printk("\n[ERROR] in %s : undefined display type %d\n", |
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539 | __FUNCTION__ , type ); |
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540 | #endif |
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541 | this->errno = EINVAL; |
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542 | return -1; |
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543 | } |
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544 | } // end switch on type |
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545 | |
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546 | #if (DEBUG_SYS_DISPLAY || CONFIG_INSTRUMENTATION_SYSCALLS) |
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547 | uint64_t tm_end = hal_get_cycles(); |
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548 | #endif |
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549 | |
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550 | #if DEBUG_SYS_DISPLAY |
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551 | if( DEBUG_SYS_DISPLAY < tm_end ) |
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552 | printk("\n[%s] thread[%x,%x] exit / cycle %d\n", |
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553 | __FUNCTION__, process->pid, this->trdid, (uint32_t)tm_end ); |
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554 | #endif |
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555 | |
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556 | #if CONFIG_INSTRUMENTATION_SYSCALLS |
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557 | hal_atomic_add( &syscalls_cumul_cost[SYS_DISPLAY] , tm_end - tm_start ); |
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558 | hal_atomic_add( &syscalls_occurences[SYS_DISPLAY] , 1 ); |
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559 | #endif |
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560 | |
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561 | return 0; |
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562 | |
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563 | } // end sys_display() |
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