utils/mkyaffsimage.c

   1 /*
   2  * YAFFS: Yet Another Flash File System. 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 Charles Manning <charles@aleph1.co.uk>
   8  * Nick Bane modifications flagged NCB
   9  * Endian handling patches by James Ng
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 /*
  17  * makeyaffsimage.c
  18  *
  19  * Makes a YAFFS file system image that can be used to load up a file system.
  20  */
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <fcntl.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <dirent.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include "yaffs_ecc.h"
  31 #include "yaffs_guts.h"
  32
  33
  34 #define MAX_OBJECTS 10000
  35
  36 const char * mkyaffsimage_c_version = "$Id: mkyaffsimage.c,v 1.7 2003/07/16 03:00:48 charles Exp $";
  37
  38
  39 typedef struct
  40 {
  41         dev_t dev;
  42         ino_t ino;
  43         int   obj;
  44 } objItem;
  45
  46
  47 static objItem obj_list[MAX_OBJECTS];
  48 static int obj_alloc_id = YAFFS_NOBJECT_BUCKETS + 1;
  49
  50 static int n_obj, nDirectories, nPages;
  51
  52 static int outFile;
  53
  54 static int error;
  55
  56 static int convert_endian = 0;
  57
  58 static int obj_compare(const void *a, const void * b)
  59 {
  60   objItem *oa, *ob;
  61
  62   oa = (objItem *)a;
  63   ob = (objItem *)b;
  64
  65   if(oa->dev < ob->dev) return -1;
  66   if(oa->dev > ob->dev) return 1;
  67   if(oa->ino < ob->ino) return -1;
  68   if(oa->ino > ob->ino) return 1;
  69
  70   return 0;
  71 }
  72
  73
  74 static void add_obj_to_list(dev_t dev, ino_t ino, int obj)
  75 {
  76         if(n_obj < MAX_OBJECTS)
  77         {
  78                 obj_list[n_obj].dev = dev;
  79                 obj_list[n_obj].ino = ino;
  80                 obj_list[n_obj].obj = obj;
  81                 n_obj++;
  82                 qsort(obj_list,n_obj,sizeof(objItem),obj_compare);
  83
  84         }
  85         else
  86         {
  87                 // oops! not enough space in the object array
  88                 fprintf(stderr,"Not enough space in object array\n");
  89                 exit(2);
  90         }
  91 }
  92
  93
  94 static int find_obj_in_list(dev_t dev, ino_t ino)
  95 {
  96         objItem *i = NULL;
  97         objItem test;
  98
  99         test.dev = dev;
 100         test.ino = ino;
 101
 102         if(n_obj > 0)
 103         {
 104                 i = bsearch(&test,obj_list,n_obj,sizeof(objItem),obj_compare);
 105         }
 106
 107         if(i)
 108         {
 109                 return i->obj;
 110         }
 111         return -1;
 112 }
 113
 114 // NCB added 10/9/2002
 115 static u16 yaffs_calc_name_sum(const char *name)
 116 {
 117         u16 sum = 0;
 118         u16 i = 1;
 119
 120         u8 *bname = (u8 *)name;
 121
 122         while (*bname)
 123         {
 124                 sum += (*bname) * i;
 125                 i++;
 126                 bname++;
 127         }
 128         return sum;
 129 }
 130
 131
 132 static void yaffs_calc_ecc(const u8 *data, struct yaffs_spare *spare)
 133 {
 134         yaffs_ecc_calc(data , spare->ecc1);
 135         yaffs_ecc_calc(&data[256] , spare->ecc2);
 136 }
 137
 138 static void yaffs_calc_tags_ecc(struct yaffs_tags *tags)
 139 {
 140         // Todo don't do anything yet. Need to calculate ecc
 141         unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
 142         unsigned  i,j;
 143         unsigned  ecc = 0;
 144         unsigned bit = 0;
 145
 146     // Clear ECC fields
 147     if (!convert_endian)
 148     {
 149             tags->ecc = 0;
 150     }
 151     else
 152     {
 153         // Because we're in "munged tag" mode, we have to clear it manually
 154         b[6] &= 0xC0;
 155         b[7] &= 0x03;
 156     }
 157
 158         for(i = 0; i < 8; i++)
 159         {
 160 // NCB modified 20-9-02         for(j = 1; j &0x7f; j<<=1)
 161                 for(j = 1; j &0xff; j<<=1)
 162                 {
 163                         bit++;
 164                         if(b[i] & j)
 165                         {
 166                                 ecc ^= bit;
 167                         }
 168                 }
 169         }
 170
 171         // Write out ECC
 172     if (!convert_endian)
 173     {
 174         tags->ecc = ecc;
 175     }
 176     else
 177     {
 178             // We have to munge the ECC again.
 179             b[6] |= ((ecc >> 6) & 0x3F);
 180         b[7] |= ((ecc & 0x3F) << 2);
 181     }
 182 }
 183 static void yaffs_load_tags_to_spare(struct yaffs_spare *sparePtr, struct yaffs_tags *tagsPtr)
 184 {
 185         union yaffs_tags_union *tu = (union yaffs_tags_union *)tagsPtr;
 186
 187         //yaffs_calc_tags_ecc(tagsPtr);
 188
 189         sparePtr->tb0 = tu->as_bytes[0];
 190         sparePtr->tb1 = tu->as_bytes[1];
 191         sparePtr->tb2 = tu->as_bytes[2];
 192         sparePtr->tb3 = tu->as_bytes[3];
 193         sparePtr->tb4 = tu->as_bytes[4];
 194         sparePtr->tb5 = tu->as_bytes[5];
 195         sparePtr->tb6 = tu->as_bytes[6];
 196         sparePtr->tb7 = tu->as_bytes[7];
 197 }
 198
 199 /* This little function converts a little endian tag to a big endian tag.
 200  * NOTE: The tag is not usable after this other than calculating the CRC
 201  * with.
 202  */
 203 static void little_to_big_endian(struct yaffs_tags *tagsPtr)
 204 {
 205     union yaffs_tags_union * tags = (union yaffs_tags_union* )tagsPtr; // Work in bytes.
 206     union yaffs_tags_union   temp;
 207
 208     memset(&temp, 0, sizeof(temp));
 209     // Ick, I hate magic numbers.
 210     temp.as_bytes[0] = ((tags->as_bytes[2] & 0x0F) << 4) | ((tags->as_bytes[1] & 0xF0) >> 4);
 211     temp.as_bytes[1] = ((tags->as_bytes[1] & 0x0F) << 4) | ((tags->as_bytes[0] & 0xF0) >> 4);
 212     temp.as_bytes[2] = ((tags->as_bytes[0] & 0x0F) << 4) | ((tags->as_bytes[2] & 0x30) >> 2) | ((tags->as_bytes[3] & 0xC0) >> 6);
 213     temp.as_bytes[3] = ((tags->as_bytes[3] & 0x3F) << 2) | ((tags->as_bytes[2] & 0xC0) >> 6);
 214     temp.as_bytes[4] = ((tags->as_bytes[6] & 0x03) << 6) | ((tags->as_bytes[5] & 0xFC) >> 2);
 215     temp.as_bytes[5] = ((tags->as_bytes[5] & 0x03) << 6) | ((tags->as_bytes[4] & 0xFC) >> 2);
 216     temp.as_bytes[6] = ((tags->as_bytes[4] & 0x03) << 6) | (tags->as_bytes[7] & 0x3F);
 217     temp.as_bytes[7] = (tags->as_bytes[6] & 0xFC) | ((tags->as_bytes[7] & 0xC0) >> 6);
 218
 219     // Now copy it back.
 220     tags->as_bytes[0] = temp.as_bytes[0];
 221     tags->as_bytes[1] = temp.as_bytes[1];
 222     tags->as_bytes[2] = temp.as_bytes[2];
 223     tags->as_bytes[3] = temp.as_bytes[3];
 224     tags->as_bytes[4] = temp.as_bytes[4];
 225     tags->as_bytes[5] = temp.as_bytes[5];
 226     tags->as_bytes[6] = temp.as_bytes[6];
 227     tags->as_bytes[7] = temp.as_bytes[7];
 228 }
 229
 230 static int write_chunk(u8 *data, u32 obj_id, u32 chunk_id, u32 n_bytes)
 231 {
 232         struct yaffs_tags t;
 233         struct yaffs_spare s;
 234
 235         error = write(outFile,data,512);
 236         if(error < 0) return error;
 237
 238         memset(&t,0xff,sizeof (struct yaffs_tags));
 239         memset(&s,0xff,sizeof (struct yaffs_spare));
 240
 241         t.chunk_id = chunk_id;
 242         t.serial_number = 0;
 243         t.n_bytes_lsb = n_bytes;
 244         t.obj_id = obj_id;
 245
 246     if (convert_endian)
 247     {
 248         little_to_big_endian(&t);
 249     }
 250
 251         yaffs_calc_tags_ecc(&t);
 252         yaffs_load_tags_to_spare(&s,&t);
 253         yaffs_calc_ecc(data,&s);
 254
 255         nPages++;
 256
 257         return write(outFile,&s,sizeof(struct yaffs_spare));
 258
 259 }
 260
 261 #define SWAP32(x)   ((((x) & 0x000000FF) << 24) | \
 262                      (((x) & 0x0000FF00) << 8 ) | \
 263                      (((x) & 0x00FF0000) >> 8 ) | \
 264                      (((x) & 0xFF000000) >> 24))
 265
 266 #define SWAP16(x)   ((((x) & 0x00FF) << 8) | \
 267                      (((x) & 0xFF00) >> 8))
 268
 269 // This one is easier, since the types are more standard. No funky shifts here.
 270 static void object_header_little_to_big_endian(struct yaffs_obj_hdr* oh)
 271 {
 272     oh->type = SWAP32(oh->type); // GCC makes enums 32 bits.
 273     oh->parent_obj_id = SWAP32(oh->parent_obj_id); // int
 274     oh->sum_no_longer_used = SWAP16(oh->sum_no_longer_used); // u16 - Not used, but done for completeness.
 275     // name = skip. Char array. Not swapped.
 276     oh->yst_mode = SWAP32(oh->yst_mode);
 277
 278     // Regular POSIX.
 279     oh->yst_uid = SWAP32(oh->yst_uid);
 280     oh->yst_gid = SWAP32(oh->yst_gid);
 281     oh->yst_atime = SWAP32(oh->yst_atime);
 282     oh->yst_mtime = SWAP32(oh->yst_mtime);
 283     oh->yst_ctime = SWAP32(oh->yst_ctime);
 284
 285     oh->file_size_low = SWAP32(oh->file_size_low); // Aiee. An int... signed, at that!
 286     oh->equiv_id = SWAP32(oh->equiv_id);
 287     // alias  - char array.
 288     oh->yst_rdev = SWAP32(oh->yst_rdev);
 289
 290     oh->win_ctime[0] = SWAP32(oh->win_ctime[0]);
 291     oh->win_ctime[1] = SWAP32(oh->win_ctime[1]);
 292     oh->win_atime[0] = SWAP32(oh->win_atime[0]);
 293     oh->win_atime[1] = SWAP32(oh->win_atime[1]);
 294     oh->win_mtime[0] = SWAP32(oh->win_mtime[0]);
 295     oh->win_mtime[1] = SWAP32(oh->win_mtime[1]);
 296
 297     oh->reserved[0] = SWAP32(oh->reserved[0]);
 298     oh->reserved[1] = SWAP32(oh->reserved[1]);
 299
 300     oh->inband_shadowed_obj_id = SWAP32(oh->inband_shadowed_obj_id);
 301     oh->inband_is_shrink = SWAP32(oh->inband_is_shrink);
 302     oh->shadows_obj = SWAP32(oh->shadows_obj);
 303     oh->is_shrink = SWAP32(oh->is_shrink);
 304 }
 305
 306 static int write_object_header(int obj_id, enum yaffs_obj_type t, struct stat *s, int parent, const char *name, int equivalentObj, const char * alias)
 307 {
 308         u8 bytes[512];
 309
 310
 311         struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)bytes;
 312
 313         memset(bytes,0xff,512);
 314
 315         oh->type = t;
 316
 317         oh->parent_obj_id = parent;
 318
 319         strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
 320
 321
 322         if(t != YAFFS_OBJECT_TYPE_HARDLINK)
 323         {
 324                 oh->yst_mode = s->st_mode;
 325                 oh->yst_uid = s->st_uid;
 326 // NCB 12/9/02          oh->yst_gid = s->yst_uid;
 327                 oh->yst_gid = s->st_gid;
 328                 oh->yst_atime = s->st_atime;
 329                 oh->yst_mtime = s->st_mtime;
 330                 oh->yst_ctime = s->st_ctime;
 331                 oh->yst_rdev  = s->st_rdev;
 332         }
 333
 334         if(t == YAFFS_OBJECT_TYPE_FILE)
 335         {
 336                 oh->file_size_low = s->st_size;
 337         }
 338
 339         if(t == YAFFS_OBJECT_TYPE_HARDLINK)
 340         {
 341                 oh->equiv_id = equivalentObj;
 342         }
 343
 344         if(t == YAFFS_OBJECT_TYPE_SYMLINK)
 345         {
 346                 strncpy(oh->alias,alias,YAFFS_MAX_ALIAS_LENGTH);
 347         }
 348
 349     if (convert_endian)
 350     {
 351         object_header_little_to_big_endian(oh);
 352     }
 353
 354         return write_chunk(bytes,obj_id,0,0xffff);
 355
 356 }
 357
 358
 359 static int process_directory(int parent, const char *path)
 360 {
 361
 362         DIR *dir;
 363         struct dirent *entry;
 364
 365         nDirectories++;
 366
 367         dir = opendir(path);
 368
 369         if(dir)
 370         {
 371                 while((entry = readdir(dir)) != NULL)
 372                 {
 373
 374                         /* Ignore . and .. */
 375                         if(strcmp(entry->d_name,".") &&
 376                            strcmp(entry->d_name,".."))
 377                         {
 378                                 char full_name[500];
 379                                 struct stat stats;
 380                                 int equivalentObj;
 381                                 int newObj;
 382
 383                                 sprintf(full_name,"%s/%s",path,entry->d_name);
 384
 385                                 lstat(full_name,&stats);
 386
 387                                 if(S_ISLNK(stats.st_mode) ||
 388                                     S_ISREG(stats.st_mode) ||
 389                                     S_ISDIR(stats.st_mode) ||
 390                                     S_ISFIFO(stats.st_mode) ||
 391                                     S_ISBLK(stats.st_mode) ||
 392                                     S_ISCHR(stats.st_mode) ||
 393                                     S_ISSOCK(stats.st_mode))
 394                                 {
 395
 396                                         newObj = obj_alloc_id++;
 397                                         n_obj++;
 398
 399                                         printf("Object %d, %s is a ",newObj,full_name);
 400
 401                                         /* We're going to create an object for it */
 402                                         if((equivalentObj = find_obj_in_list(stats.st_dev, stats.st_ino)) > 0)
 403                                         {
 404                                                 /* we need to make a hard link */
 405                                                 printf("hard link to object %d\n",equivalentObj);
 406                                                 error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_HARDLINK, &stats, parent, entry->d_name, equivalentObj, NULL);
 407                                         }
 408                                         else
 409                                         {
 410
 411                                                 add_obj_to_list(stats.st_dev,stats.st_ino,newObj);
 412
 413                                                 if(S_ISLNK(stats.st_mode))
 414                                                 {
 415
 416                                                         char symname[500];
 417
 418                                                         memset(symname,0, sizeof(symname));
 419
 420                                                         readlink(full_name,symname,sizeof(symname) -1);
 421
 422                                                         printf("symlink to \"%s\"\n",symname);
 423                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SYMLINK, &stats, parent, entry->d_name, -1, symname);
 424
 425                                                 }
 426                                                 else if(S_ISREG(stats.st_mode))
 427                                                 {
 428                                                         printf("file, ");
 429                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_FILE, &stats, parent, entry->d_name, -1, NULL);
 430
 431                                                         if(error >= 0)
 432                                                         {
 433                                                                 int h;
 434                                                                 u8 bytes[512];
 435                                                                 int n_bytes;
 436                                                                 int chunk = 0;
 437
 438                                                                 h = open(full_name,O_RDONLY);
 439                                                                 if(h >= 0)
 440                                                                 {
 441                                                                         memset(bytes,0xff,512);
 442                                                                         while((n_bytes = read(h,bytes,512)) > 0)
 443                                                                         {
 444                                                                                 chunk++;
 445                                                                                 write_chunk(bytes,newObj,chunk,n_bytes);
 446                                                                                 memset(bytes,0xff,512);
 447                                                                         }
 448                                                                         if(n_bytes < 0)
 449                                                                            error = n_bytes;
 450
 451                                                                         printf("%d data chunks written\n",chunk);
 452                                                                 }
 453                                                                 else
 454                                                                 {
 455                                                                         perror("Error opening file");
 456                                                                 }
 457                                                                 close(h);
 458
 459                                                         }
 460
 461                                                 }
 462                                                 else if(S_ISSOCK(stats.st_mode))
 463                                                 {
 464                                                         printf("socket\n");
 465                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 466                                                 }
 467                                                 else if(S_ISFIFO(stats.st_mode))
 468                                                 {
 469                                                         printf("fifo\n");
 470                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 471                                                 }
 472                                                 else if(S_ISCHR(stats.st_mode))
 473                                                 {
 474                                                         printf("character device\n");
 475                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 476                                                 }
 477                                                 else if(S_ISBLK(stats.st_mode))
 478                                                 {
 479                                                         printf("block device\n");
 480                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 481                                                 }
 482                                                 else if(S_ISDIR(stats.st_mode))
 483                                                 {
 484                                                         printf("directory\n");
 485                                                         error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, parent, entry->d_name, -1, NULL);
 486 // NCB modified 10/9/2001                               process_directory(1,full_name);
 487                                                         process_directory(newObj,full_name);
 488                                                 }
 489                                         }
 490                                 }
 491                                 else
 492                                 {
 493                                         printf(" we don't handle this type\n");
 494                                 }
 495                         }
 496                 }
 497         }
 498
 499         return 0;
 500
 501 }
 502
 503
 504 int main(int argc, char *argv[])
 505 {
 506         struct stat stats;
 507
 508         printf("mkyaffsimage: image building tool for YAFFS built "__DATE__"\n");
 509
 510         if(argc < 3)
 511         {
 512                 printf("usage: mkyaffsimage dir image_file [convert]\n");
 513                 printf("           dir        the directory tree to be converted\n");
 514                 printf("           image_file the output file to hold the image\n");
 515         printf("           'convert'  produce a big-endian image from a little-endian machine\n");
 516                 exit(1);
 517         }
 518
 519     if ((argc == 4) && (!strncmp(argv[3], "convert", strlen("convert"))))
 520     {
 521         convert_endian = 1;
 522     }
 523
 524         if(stat(argv[1],&stats) < 0)
 525         {
 526                 printf("Could not stat %s\n",argv[1]);
 527                 exit(1);
 528         }
 529
 530         if(!S_ISDIR(stats.st_mode))
 531         {
 532                 printf(" %s is not a directory\n",argv[1]);
 533                 exit(1);
 534         }
 535
 536         outFile = open(argv[2],O_CREAT | O_TRUNC | O_WRONLY, S_IREAD | S_IWRITE);
 537
 538
 539         if(outFile < 0)
 540         {
 541                 printf("Could not open output file %s\n",argv[2]);
 542                 exit(1);
 543         }
 544
 545         printf("Processing directory %s into image file %s\n",argv[1],argv[2]);
 546         error =  write_object_header(1, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, 1,"", -1, NULL);
 547         if(error)
 548         error = process_directory(YAFFS_OBJECTID_ROOT,argv[1]);
 549
 550         close(outFile);
 551
 552         if(error < 0)
 553         {
 554                 perror("operation incomplete");
 555                 exit(1);
 556         }
 557         else
 558         {
 559                 printf("Operation complete.\n"
 560                        "%d objects in %d directories\n"
 561                        "%d NAND pages\n",n_obj, nDirectories, nPages);
 562         }
 563
 564         close(outFile);
 565
 566         exit(0);
 567 }
 568