direct/test-framework/timothy_tests/stress_tester/yaffs_tester.c

   1 /*
   2  * YAFFS: Yet another FFS. A NAND-flash specific file system.
   3  *
   4  * Copyright (C) 2002-2011 Aleph One Ltd.
   5  *   for Toby Churchill Ltd and Brightstar Engineering
   6  *
   7  * Created by Timothy Manning <timothy@yaffs.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /*
  15  * yaffs_tester.c designed to stress test yaffs2 direct.
  16  */
  17
  18
  19 #include "yaffs_tester.h"
  20
  21
  22
  23 int random_seed;
  24 int simulate_power_failure = 0;
  25
  26
  27 buffer message_buffer;  /*create  message_buffer */
  28
  29 char yaffs_test_dir[] ="/yaffs2/test_dir";      /*the path to the directory where all of the testing will take place*/
  30 char yaffs_mount_dir[]="/yaffs2/";              /*the path to the mount point which yaffs will mount*/
  31
  32
  33 int main(int argc, char *argv[]){
  34
  35
  36         init(yaffs_test_dir,yaffs_mount_dir,argc,argv);
  37         test(yaffs_test_dir);
  38         yaffs_unmount(yaffs_mount_dir);
  39         return 0;
  40 }
  41
  42
  43
  44 void init(char *yaffs_test_dir,char *yaffs_mount_dir,int argc, char *argv[]){
  45         char output=0;
  46         int x=0;
  47         int seed=-1;
  48         FILE *log_handle;
  49         /*these variables are already set to zero, but it is better not to take chances*/
  50         message_buffer.head=0;
  51         message_buffer.tail=0;
  52
  53
  54         log_handle=fopen(LOG_FILE,"w");
  55         if (log_handle!=NULL){
  56                 fputs("log file for yaffs tester\n",log_handle);
  57                 fclose(log_handle);
  58         }
  59         add_to_buffer(&message_buffer,"welcome to the yaffs tester",MESSAGE_LEVEL_BASIC_TASKS,PRINT);/* print boot up message*/
  60         yaffs_start_up();
  61         yaffs_mount(yaffs_mount_dir);
  62         for (x=0;x<argc;x++){
  63 //              add_to_buffer(&message_buffer,"argv ",MESSAGE_LEVEL_BASIC_TASKS,PRINT);
  64 //              add_to_buffer(&message_buffer,argv[x],MESSAGE_LEVEL_BASIC_TASKS,PRINT);
  65                 if (strcmp("-seed",argv[x])==0){                        /*warning only compares the length of the strings, quick fix*/
  66                         seed= atoi(argv[x+1]);
  67                         /*add_to_buffer(&message_buffer,"setting seed to ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
  68                         append_int_to_buffer(&message_buffer,seed,MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
  69                         append_to_buffer(&message_buffer,"\n",MESSAGE_LEVEL_BASIC_TASKS,PRINT);*/
  70                 }
  71         }
  72         if (seed==-1){
  73                 seed=time(NULL);
  74                 srand(seed);
  75         }
  76         else {
  77         srand(seed);
  78         }
  79         add_to_buffer(&message_buffer,"setting seed to ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
  80         append_int_to_buffer(&message_buffer,seed,MESSAGE_LEVEL_BASIC_TASKS,PRINT);/* print boot up message*/
  81
  82         if (yaffs_access(yaffs_test_dir,0))     /* if the test folder does not exist then create it */
  83         {
  84                 add_to_buffer(&message_buffer,"creating dir: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
  85                 append_to_buffer(&message_buffer,yaffs_test_dir,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
  86                 output=yaffs_mkdir(yaffs_test_dir,S_IREAD | S_IWRITE);
  87                 yaffs_check_for_errors(output, &message_buffer,"could not create dir","created dir\n\n");
  88         }
  89
  90 }
  91
  92 void quit_program(){
  93         yaffs_unmount(yaffs_mount_dir);
  94         exit(1);
  95 }
  96 void join_paths(char *path1,char *path2,char *new_path ){
  97
  98 /*      printf("strlen path1:%d\n",strlen(path1));
  99         printf("strlen path2:%d\n",strlen(path2));
 100         printf("path1; %s\n",path1);
 101 */
 102         add_to_buffer(&message_buffer, "joining paths:",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 103         append_to_buffer(&message_buffer,path1,MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 104         append_to_buffer(&message_buffer, " and ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 105         append_to_buffer(&message_buffer, path2,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 106         if ( (path1[(sizeof(path1)/sizeof(char))-2]=='/') && path2[0]!='/') {
 107                 /*paths are compatiable. concatanate them. note -2 is because of \0*/
 108                 strcat(new_path,path1);
 109                 strcat(new_path,path2);
 110                 //char new_path[(sizeof(path1)/sizeof(char))+(sizeof(path2)/sizeof(char))];
 111                 //strcpy(new_path,strcat(path1,path2));
 112                 //return new_path;
 113         }
 114         else if ((path1[(sizeof(path1)/sizeof(char))-2]!='/') && path2[0]=='/') {
 115                 /*paths are compatiable. concatanate them*/
 116                 strcat(new_path,path1);
 117                 strcat(new_path,path2);
 118                 //char new_path[(sizeof(path1)/sizeof(char))+(sizeof(path2)/sizeof(char))];
 119                 //strcpy(new_path,strcat(path1,path2));
 120                 //return new_path;
 121         }
 122         else if ((path1[(sizeof(path1)/sizeof(char))-2]!='/') && path2[0]!='/') {
 123                         /*need to add a "/". */
 124                 strcat(new_path,path1);
 125                 strcat(new_path,"/");
 126                 strcat(new_path,path2);
 127                 //strcpy(new_path,strcat(path1,strcat("/\0",path2)));
 128
 129 #if 0
 130                 copy_array(path1,new_path,0,0);
 131                 copy_array('\0',new_path,0,(sizeof(path1)/sizeof(char)));
 132                 copy_array(path2,new_path,0,(sizeof(path1)/sizeof(char))+1);
 133  old method now trying to use copy_array
 134                 //char new_path[(sizeof(path1)/sizeof(char))+(sizeof(path2)/sizeof(char))+1];
 135                 for (x=0;x<=(sizeof(path1)/sizeof(char))-1;x++){
 136                         new_path[x]=path1[x];
 137                 }
 138                 new_path[x+1]='/';
 139                 for (x=(sizeof(path1)/sizeof(char)) ,i=0 ;i<=(sizeof(path2)/sizeof(char));x++,i++){
 140                         new_path[x]=path2[i];
 141                 }
 142 #endif
 143
 144                 //return new_path;
 145         }
 146         else if ((path1[(sizeof(path1)/sizeof(char))-2]=='/') && path2[0]=='/') {
 147                 /*need to remove a "/". */
 148                 /*yaffs does not mind the extra slash. */
 149                 //char new_path[(sizeof(path1)/sizeof(char))+(sizeof(path2)/sizeof(char))-1];
 150
 151                 strcat(new_path,path1);
 152                 strcat(new_path,path2);
 153                 //strcpy(new_path,strcat(path1,strncat("",path2,(sizeof(path1)/sizeof(char))-1)));
 154                 //return new_path;
 155         }
 156         else{
 157                 //error
 158                 //return -1;
 159         }
 160 }
 161
 162 void open_random_file(char *yaffs_test_dir, handle_regster *P_open_handles_array){
 163         int output=0;
 164         int x=0;
 165         char name[MAX_FILE_NAME_SIZE+3 ]="apple\0";
 166         char path[MAX_FILE_NAME_SIZE+strlen(yaffs_test_dir)];
 167         path[0]='\0';// this should clear the path
 168         add_to_buffer(&message_buffer,"\n\number of opened handles: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 169         append_int_to_buffer(&message_buffer,P_open_handles_array->number_of_open_handles,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 170         if (P_open_handles_array->number_of_open_handles<MAX_NUMBER_OF_OPENED_HANDLES)
 171         {
 172                 generate_random_string(name,MAX_FILE_NAME_SIZE);
 173                 printf("before %d %d %d\n",strlen(yaffs_test_dir),strlen(name),strlen(path));
 174                 join_paths(yaffs_test_dir,name,path);
 175                 printf("after %d %d %d\n",strlen(yaffs_test_dir),strlen(name),strlen(path));
 176                 add_to_buffer(&message_buffer,"trying to open file: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 177                 append_to_buffer(&message_buffer,path,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 178                 if (yaffs_access(path,0)==0){
 179                         stat_file(path);
 180                 }
 181                 else {
 182                         add_to_buffer(&message_buffer,"file does not exists, creating file",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 183                 }
 184
 185                 output=yaffs_open(path,O_CREAT | O_TRUNC| O_RDWR, S_IREAD | S_IWRITE);
 186                 x=0;
 187                 for (x=0;P_open_handles_array->handle[x]!=-3 && x<MAX_NUMBER_OF_OPENED_HANDLES;x++){}   /*find an empty handle*/
 188
 189                 add_to_buffer(&message_buffer,"handle array id ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 190                 append_int_to_buffer(&message_buffer,x,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 191
 192                 //for (x=0;handle_pointers[x]!=NULL;x++){}
 193                 P_open_handles_array->handle[x]=output;
 194                 P_open_handles_array->path[x][0]='\0';
 195                 strcat(P_open_handles_array->path[x],path);
 196                 add_to_buffer(&message_buffer,"yaffs handle: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 197                 append_int_to_buffer(&message_buffer,output,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 198                 add_to_buffer(&message_buffer,"stored handle: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 199
 200                 //yaffs_open will return a null pointer if it cannot open a file. check for errors will not work.
 201                 yaffs_check_for_errors(output, &message_buffer,"failed to open file","opened file");
 202
 203                 P_open_handles_array->number_of_open_handles++;
 204         }
 205         else  close_random_file(P_open_handles_array);
 206
 207 }
 208
 209 void write_to_random_file(handle_regster *P_open_handles_array){
 210         int number_of_lines_of_text=0;
 211         int length=100;
 212         char text[length+1];
 213         text[0]='\0';
 214         int seek=0;
 215         int x=0;
 216         int output=0;
 217         if (P_open_handles_array->number_of_open_handles>0){
 218
 219                 while (P_open_handles_array->handle[x]==-3){            /*find a random open handle*/
 220                         x=rand() % (MAX_NUMBER_OF_OPENED_HANDLES-1);
 221                 }
 222                 add_to_buffer(&message_buffer,"\n\ntrying to write to ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 223                 append_to_buffer(&message_buffer,P_open_handles_array->path[x],MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 224
 225                 stat_file(P_open_handles_array->path[x]);
 226                 number_of_lines_of_text=rand() %1000;
 227                 add_to_buffer(&message_buffer,"writing  ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 228                 append_int_to_buffer(&message_buffer,number_of_lines_of_text,MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 229                 append_to_buffer(&message_buffer," lines of text",MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 230
 231
 232                 for (;number_of_lines_of_text>0;number_of_lines_of_text--)
 233                 {
 234                         generate_random_string(text,length);
 235                         seek=rand()%1000;
 236                         add_to_buffer(&message_buffer,"trying to seek to  ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 237                         append_int_to_buffer(&message_buffer,seek,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 238                         output=yaffs_lseek(P_open_handles_array->handle[x],seek,SEEK_SET);
 239                         yaffs_check_for_errors(output, &message_buffer,"failed to seek","seeked file");
 240                         add_to_buffer(&message_buffer,"trying to write to file",MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 241                         output=yaffs_write(P_open_handles_array->handle[x], text, strlen(text));
 242                         yaffs_check_for_errors(output, &message_buffer,"failed to write text","wrote text");
 243
 244                 }
 245          }
 246 }
 247
 248 void truncate_random_file(handle_regster *P_open_handles_array){
 249         int x=0;
 250         int truncate_size=0;
 251         int output=0;
 252
 253         if (P_open_handles_array->number_of_open_handles>0){
 254                 add_to_buffer(&message_buffer,"\n\ntruncate function ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 255                 while (P_open_handles_array->handle[x]==-3){            /*find a random open handle*/
 256                         x=rand() % (MAX_NUMBER_OF_OPENED_HANDLES-1);
 257                 }
 258                 add_to_buffer(&message_buffer,"trying to truncate ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 259                 append_to_buffer(&message_buffer,P_open_handles_array->path[x],MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 260
 261                 stat_file(P_open_handles_array->path[x]);
 262                 truncate_size=rand() %10000;
 263                 output=yaffs_ftruncate(P_open_handles_array->handle[x], truncate_size);
 264                 yaffs_check_for_errors(output, &message_buffer,"failed to truncate file","truncated file");
 265         }
 266 }
 267
 268 void close_random_file(handle_regster *P_open_handles_array){
 269         /*run out of space on the handle pointer array*/
 270         /*make space*/
 271         int x=0;
 272         int output=0;
 273         int start=0;
 274         printf("trying to clear handle");
 275         if (P_open_handles_array->number_of_open_handles>0){
 276                 start=rand() % (MAX_NUMBER_OF_OPENED_HANDLES-1);
 277
 278                 for (x=start;(x+1>start ||x<start);){
 279                         x++;
 280                         if (x>MAX_NUMBER_OF_OPENED_HANDLES-1) x=0;
 281                         if (P_open_handles_array->handle[x] !=-3 ){
 282                                 //the handle is open, so try to close it.
 283                                 break;
 284                         }
 285
 286                 }
 287                 if (P_open_handles_array->handle[x]!=-3)
 288                 {
 289                         add_to_buffer(&message_buffer,"\n\ntrying to close file: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 290                         append_to_buffer(&message_buffer,P_open_handles_array->path[x],MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 291                         add_to_buffer(&message_buffer,"file handle: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 292                         append_int_to_buffer(&message_buffer,P_open_handles_array->handle[x],MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 293
 294                         stat_file(P_open_handles_array->path[x]);
 295                         output=yaffs_close(P_open_handles_array->handle[x]);
 296
 297                         if (output==-1) yaffs_check_for_errors(output, &message_buffer,"failed to close file","closed file");
 298                         else {
 299                                 yaffs_check_for_errors(output, &message_buffer,"failed to close file","closed file");
 300                                 P_open_handles_array->handle[x]=-3;
 301                                 P_open_handles_array->path[x][0]='\0';
 302                                 P_open_handles_array->number_of_open_handles--;
 303                         }
 304                 }
 305                 else {
 306                         add_to_buffer(&message_buffer,"\n\ntried to close file but could not find a open file ",MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 307                 }
 308         }
 309 }
 310
 311 void stat_file(char *path){
 312         int output=0;
 313         struct yaffs_stat stat;
 314         if (yaffs_access(path,0)==0){
 315                 add_to_buffer(&message_buffer,"file exists, trying to stat: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 316                 add_to_buffer(&message_buffer,path,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 317                 output=yaffs_lstat(path,&stat);
 318                 yaffs_check_for_errors(output, &message_buffer,"failed to stat file","statted file");
 319                 //stat.st_ino,(int)stat.st_size,stat.st_mode
 320                 add_to_buffer(&message_buffer,"yaffs inode: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 321                 append_int_to_buffer(&message_buffer,stat.st_ino,MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 322                 append_to_buffer(&message_buffer," file size: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 323                 append_int_to_buffer(&message_buffer,(int)stat.st_size,MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 324                 append_to_buffer(&message_buffer," file mode: ",MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 325                 append_int_to_buffer(&message_buffer,stat.st_mode,MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 326         }
 327         else{
 328                 add_to_buffer(&message_buffer,path,MESSAGE_LEVEL_BASIC_TASKS,NPRINT);
 329                 append_to_buffer(&message_buffer," does not exist,could not stat",MESSAGE_LEVEL_BASIC_TASKS,PRINT);
 330         }
 331 }
 332
 333 void test(char*yaffs_test_dir){
 334         struct yaffs_stat stat;
 335         int output=0;
 336         //char name[MAX_FILE_NAME_SIZE+3 ]="apple\0";
 337         //char path[MAX_FILE_NAME_SIZE];
 338         handle_regster open_handles_array;
 339         //int handle_pointers[MAX_NUMBER_OF_OPENED_HANDLES];
 340         //int number_of_opened_handles=0;
 341         int x=0;
 342
 343
 344         open_handles_array.number_of_open_handles=0;
 345         for (x=0;x<MAX_NUMBER_OF_OPENED_HANDLES;x++){
 346                 open_handles_array.handle[x]=-3;
 347                 open_handles_array.path[x][0]='\0';
 348
 349         }
 350
 351         while(1)
 352         {
 353
 354                 x=rand() % 3;
 355                 printf("running test: %d",x);
 356                 switch(x){
 357                         case 0 :open_random_file(yaffs_test_dir,&open_handles_array);break;
 358                         case 3 :write_to_random_file(&open_handles_array);break;
 359 //                      case 1 :close_random_file(&open_handles_array);break;
 360                         case 2 :truncate_random_file(&open_handles_array);break;
 361                 }
 362         }
 363 }
 364 void  generate_random_string(char *ptr,int length_of_str){
 365         unsigned int x;
 366         unsigned int length=((rand() %length_of_str)+1);        /*creates a int with the number of charecters been between 1 and 51*/
 367         char letter='\0';
 368
 369         //printf("generating string\n");
 370         //printf("string length is %d\n",length);
 371         for (x=0; x <= (length-2) &&length>2 ; x++)
 372         {
 373                 //printf("x=%d\n",x);
 374                 /* keep generating a charecter until the charecter is legal*/
 375                 while((letter=='\0' )||(letter=='/')||(letter=='\\')){
 376                         letter=(rand() % 126-32)+32;    /*generate a number between 32 and 126 and uses it as a charecter (letter) */
 377                 }
 378                 ptr[x]=letter;
 379                 //printf("charecter generated is %c\n",ptr[x]);
 380         }
 381         ptr[x+1]='\0';  /*adds NULL charecter to turn it into a string*/
 382
 383 }
 384