utils/mkyaffs2image.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  * mkyaffs2image hacks by NCB
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 /*
  18  * makeyaffs2image.c
  19  *
  20  * Makes a YAFFS2 file system image that can be used to load up a file system.
  21  * Uses default Linux MTD layout - search for "NAND LAYOUT" to change.
  22  */
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <fcntl.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <dirent.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <errno.h>
  33 #include <assert.h>
  34 #include "yaffs_ecc.h"
  35 #include "yaffs_guts.h"
  36
  37 #include "yaffs_packedtags2.h"
  38
  39 unsigned yaffs_trace_mask=0;
  40
  41 #define MAX_OBJECTS 10000
  42
  43 // Adjust these to match your NAND LAYOUT:
  44 #define chunkSize 2048
  45 #define spareSize 64
  46 #define pagesPerBlock 64
  47
  48
  49
  50 typedef struct
  51 {
  52         dev_t dev;
  53         ino_t ino;
  54         int   obj;
  55 } objItem;
  56
  57
  58 static objItem obj_list[MAX_OBJECTS];
  59 static int obj_id = YAFFS_NOBJECT_BUCKETS + 1;
  60
  61 static int n_obj, nDirectories, nPages;
  62
  63 static int outFile;
  64
  65 static int error;
  66 static int savedErrno;
  67
  68 static int convert_endian = 0;
  69
  70 static void fatal(const char *fn)
  71 {
  72         perror(fn);
  73         error |= 1;
  74         exit(error);
  75 }
  76
  77 static int warn(const char *fn)
  78 {
  79         savedErrno = errno;
  80         perror(fn);
  81         error |= 2;
  82         return error;
  83 }
  84
  85 static int obj_compare(const void *a, const void * b)
  86 {
  87   objItem *oa, *ob;
  88
  89   oa = (objItem *)a;
  90   ob = (objItem *)b;
  91
  92   if(oa->dev < ob->dev) return -1;
  93   if(oa->dev > ob->dev) return 1;
  94   if(oa->ino < ob->ino) return -1;
  95   if(oa->ino > ob->ino) return 1;
  96
  97   return 0;
  98 }
  99
 100
 101 static void add_obj_to_list(dev_t dev, ino_t ino, int obj)
 102 {
 103         if(n_obj < MAX_OBJECTS)
 104         {
 105                 obj_list[n_obj].dev = dev;
 106                 obj_list[n_obj].ino = ino;
 107                 obj_list[n_obj].obj = obj;
 108                 n_obj++;
 109                 qsort(obj_list,n_obj,sizeof(objItem),obj_compare);
 110
 111         }
 112         else
 113         {
 114                 // oops! not enough space in the object array
 115                 fprintf(stderr,"Not enough space in object array\n");
 116                 exit(1);
 117         }
 118 }
 119
 120
 121 static int find_obj_in_list(dev_t dev, ino_t ino)
 122 {
 123         objItem *i = NULL;
 124         objItem test;
 125
 126         test.dev = dev;
 127         test.ino = ino;
 128
 129         if(n_obj > 0)
 130         {
 131                 i = bsearch(&test,obj_list,n_obj,sizeof(objItem),obj_compare);
 132         }
 133
 134         if(i)
 135         {
 136                 return i->obj;
 137         }
 138         return -1;
 139 }
 140
 141 /* This little function converts a little endian tag to a big endian tag.
 142  * NOTE: The tag is not usable after this other than calculating the CRC
 143  * with.
 144  */
 145 static void little_to_big_endian(struct yaffs_ext_tags *tagsPtr)
 146 {
 147 #if 0 // FIXME NCB
 148     union yaffs_tags_union * tags = (union yaffs_tags_union* )tagsPtr; // Work in bytes.
 149     union yaffs_tags_union   temp;
 150
 151     memset(&temp, 0, sizeof(temp));
 152     // Ick, I hate magic numbers.
 153     temp.as_bytes[0] = ((tags->as_bytes[2] & 0x0F) << 4) | ((tags->as_bytes[1] & 0xF0) >> 4);
 154     temp.as_bytes[1] = ((tags->as_bytes[1] & 0x0F) << 4) | ((tags->as_bytes[0] & 0xF0) >> 4);
 155     temp.as_bytes[2] = ((tags->as_bytes[0] & 0x0F) << 4) | ((tags->as_bytes[2] & 0x30) >> 2) | ((tags->as_bytes[3] & 0xC0) >> 6);
 156     temp.as_bytes[3] = ((tags->as_bytes[3] & 0x3F) << 2) | ((tags->as_bytes[2] & 0xC0) >> 6);
 157     temp.as_bytes[4] = ((tags->as_bytes[6] & 0x03) << 6) | ((tags->as_bytes[5] & 0xFC) >> 2);
 158     temp.as_bytes[5] = ((tags->as_bytes[5] & 0x03) << 6) | ((tags->as_bytes[4] & 0xFC) >> 2);
 159     temp.as_bytes[6] = ((tags->as_bytes[4] & 0x03) << 6) | (tags->as_bytes[7] & 0x3F);
 160     temp.as_bytes[7] = (tags->as_bytes[6] & 0xFC) | ((tags->as_bytes[7] & 0xC0) >> 6);
 161
 162     // Now copy it back.
 163     tags->as_bytes[0] = temp.as_bytes[0];
 164     tags->as_bytes[1] = temp.as_bytes[1];
 165     tags->as_bytes[2] = temp.as_bytes[2];
 166     tags->as_bytes[3] = temp.as_bytes[3];
 167     tags->as_bytes[4] = temp.as_bytes[4];
 168     tags->as_bytes[5] = temp.as_bytes[5];
 169     tags->as_bytes[6] = temp.as_bytes[6];
 170     tags->as_bytes[7] = temp.as_bytes[7];
 171 #endif
 172 }
 173
 174 static void shuffle_oob(char *spareData, struct yaffs_packed_tags2 *pt)
 175 {
 176         assert(sizeof(*pt) <= spareSize);
 177         // NAND LAYOUT: For non-trivial OOB orderings, here would be a good place to shuffle.
 178         memcpy(spareData, pt, sizeof(*pt));
 179 }
 180
 181 static int write_chunk(u8 *data, u32 id, u32 chunk_id, u32 n_bytes)
 182 {
 183         struct yaffs_ext_tags t;
 184         struct yaffs_packed_tags2 pt;
 185         char spareData[spareSize];
 186
 187         if (write(outFile,data,chunkSize) != chunkSize)
 188                 fatal("write");
 189
 190         memset(&t, 0, sizeof(t));
 191
 192         t.chunk_id = chunk_id;
 193 //      t.serial_number = 0;
 194         t.serial_number = 1;    // **CHECK**
 195         t.n_bytes = n_bytes;
 196         t.obj_id = id;
 197
 198         t.seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
 199
 200 // added NCB **CHECK**
 201         t.chunk_used = 1;
 202
 203         if (convert_endian)
 204         {
 205             little_to_big_endian(&t);
 206         }
 207
 208         nPages++;
 209
 210         memset(&pt, 0, sizeof(pt));
 211         yaffs_pack_tags2(&pt,&t,1);
 212
 213         memset(spareData, 0xff, sizeof(spareData));
 214         shuffle_oob(spareData, &pt);
 215
 216         if (write(outFile,spareData,sizeof(spareData)) != sizeof(spareData))
 217                 fatal("write");
 218         return 0;
 219 }
 220
 221 #define SWAP32(x)   ((((x) & 0x000000FF) << 24) | \
 222                      (((x) & 0x0000FF00) << 8 ) | \
 223                      (((x) & 0x00FF0000) >> 8 ) | \
 224                      (((x) & 0xFF000000) >> 24))
 225
 226 #define SWAP16(x)   ((((x) & 0x00FF) << 8) | \
 227                      (((x) & 0xFF00) >> 8))
 228
 229 // This one is easier, since the types are more standard. No funky shifts here.
 230 static void object_header_little_to_big_endian(struct yaffs_obj_hdr* oh)
 231 {
 232     oh->type = SWAP32(oh->type); // GCC makes enums 32 bits.
 233     oh->parent_obj_id = SWAP32(oh->parent_obj_id); // int
 234     oh->sum_no_longer_used = SWAP16(oh->sum_no_longer_used); // u16 - Not used, but done for completeness.
 235     // name = skip. Char array. Not swapped.
 236     oh->yst_mode = SWAP32(oh->yst_mode);
 237
 238     // Regular POSIX.
 239     oh->yst_uid = SWAP32(oh->yst_uid);
 240     oh->yst_gid = SWAP32(oh->yst_gid);
 241     oh->yst_atime = SWAP32(oh->yst_atime);
 242     oh->yst_mtime = SWAP32(oh->yst_mtime);
 243     oh->yst_ctime = SWAP32(oh->yst_ctime);
 244
 245     oh->file_size_low = SWAP32(oh->file_size_low); // Aiee. An int... signed, at that!
 246     oh->file_size_high = SWAP32(oh->file_size_high); // Aiee. An int... signed, at that!
 247     oh->equiv_id = SWAP32(oh->equiv_id);
 248     // alias  - char array.
 249     oh->yst_rdev = SWAP32(oh->yst_rdev);
 250
 251     oh->win_ctime[0] = SWAP32(oh->win_ctime[0]);
 252     oh->win_ctime[1] = SWAP32(oh->win_ctime[1]);
 253     oh->win_atime[0] = SWAP32(oh->win_atime[0]);
 254     oh->win_atime[1] = SWAP32(oh->win_atime[1]);
 255     oh->win_mtime[0] = SWAP32(oh->win_mtime[0]);
 256     oh->win_mtime[1] = SWAP32(oh->win_mtime[1]);
 257
 258     oh->reserved[0] = SWAP32(oh->reserved[0]);
 259     oh->reserved[1] = SWAP32(oh->reserved[1]);
 260
 261     oh->inband_shadowed_obj_id = SWAP32(oh->inband_shadowed_obj_id);
 262     oh->inband_is_shrink = SWAP32(oh->inband_is_shrink);
 263     oh->shadows_obj = SWAP32(oh->shadows_obj);
 264     oh->is_shrink = SWAP32(oh->is_shrink);
 265 }
 266
 267
 268 static int write_object_header(int id, enum yaffs_obj_type t, struct stat *s, int parent, const char *name, int equivalentObj, const char * alias)
 269 {
 270         u8 bytes[chunkSize];
 271
 272
 273         struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)bytes;
 274
 275         memset(bytes,0xff,sizeof(bytes));
 276
 277         oh->type = t;
 278
 279         oh->parent_obj_id = parent;
 280
 281         if (strlen(name)+1 > sizeof(oh->name))
 282         {
 283                 errno = ENAMETOOLONG;
 284                 return warn("object name");
 285         }
 286         memset(oh->name,0,sizeof(oh->name));
 287         strcpy(oh->name,name);
 288
 289
 290         if(t != YAFFS_OBJECT_TYPE_HARDLINK)
 291         {
 292                 oh->yst_mode = s->st_mode;
 293                 oh->yst_uid = s->st_uid;
 294 // NCB 12/9/02          oh->yst_gid = s->yst_uid;
 295                 oh->yst_gid = s->st_gid;
 296                 oh->yst_atime = s->st_atime;
 297                 oh->yst_mtime = s->st_mtime;
 298                 oh->yst_ctime = s->st_ctime;
 299                 oh->yst_rdev  = s->st_rdev;
 300         }
 301
 302         if(t == YAFFS_OBJECT_TYPE_FILE)
 303         {
 304                 oh->file_size_low = s->st_size;
 305                 oh->file_size_high = (s->st_size >> 32);
 306         }
 307
 308         if(t == YAFFS_OBJECT_TYPE_HARDLINK)
 309         {
 310                 oh->equiv_id = equivalentObj;
 311         }
 312
 313         if(t == YAFFS_OBJECT_TYPE_SYMLINK)
 314         {
 315                 if (strlen(alias)+1 > sizeof(oh->alias))
 316                 {
 317                         errno = ENAMETOOLONG;
 318                         return warn("object alias");
 319                 }
 320                 memset(oh->alias,0,sizeof(oh->alias));
 321                 strcpy(oh->alias,alias);
 322         }
 323
 324         if (convert_endian)
 325         {
 326                 object_header_little_to_big_endian(oh);
 327         }
 328
 329         return write_chunk(bytes,id,0,0xffff);
 330
 331 }
 332
 333 static void pad_image(void)
 334 {
 335         u8 data[chunkSize + spareSize];
 336         int padPages = (nPages % pagesPerBlock);
 337
 338         if (padPages)
 339         {
 340                 memset(data, 0xff, sizeof(data));
 341                 for (padPages = pagesPerBlock-padPages; padPages; padPages--)
 342                 {
 343                         if (write(outFile, data, sizeof(data)) != sizeof(data))
 344                                 fatal("write");
 345                 }
 346         }
 347 }
 348
 349 static int process_directory(int parent, const char *path)
 350 {
 351
 352         DIR *dir;
 353         struct dirent *entry;
 354
 355         nDirectories++;
 356
 357         dir = opendir(path);
 358         if(!dir)
 359         {
 360                 warn("opendir");
 361         }
 362         else
 363         {
 364                 while((entry = readdir(dir)) != NULL)
 365                 {
 366
 367                         /* Ignore . and .. */
 368                         if(strcmp(entry->d_name,".") &&
 369                            strcmp(entry->d_name,".."))
 370                         {
 371                                 char full_name[500];
 372                                 struct stat stats;
 373                                 int equivalentObj;
 374                                 int newObj;
 375
 376                                 if (snprintf(full_name,sizeof(full_name),"%s/%s",path,entry->d_name) >= (int)sizeof(full_name))
 377                                 {
 378                                         error = -1;
 379                                         continue;
 380                                 }
 381
 382                                 if (lstat(full_name,&stats) < 0)
 383                                 {
 384                                         warn("lstat");
 385                                         continue;
 386                                 }
 387
 388                                 if(S_ISLNK(stats.st_mode) ||
 389                                     S_ISREG(stats.st_mode) ||
 390                                     S_ISDIR(stats.st_mode) ||
 391                                     S_ISFIFO(stats.st_mode) ||
 392                                     S_ISBLK(stats.st_mode) ||
 393                                     S_ISCHR(stats.st_mode) ||
 394                                     S_ISSOCK(stats.st_mode))
 395                                 {
 396
 397                                         newObj = obj_id++;
 398                                         n_obj++;
 399
 400                                         printf("Object %d, %s is a ",newObj,full_name);
 401
 402                                         /* We're going to create an object for it */
 403                                         if((equivalentObj = find_obj_in_list(stats.st_dev, stats.st_ino)) > 0)
 404                                         {
 405                                                 /* we need to make a hard link */
 406                                                 printf("hard link to object %d\n",equivalentObj);
 407                                                 write_object_header(newObj, YAFFS_OBJECT_TYPE_HARDLINK, &stats, parent, entry->d_name, equivalentObj, NULL);
 408                                         }
 409                                         else
 410                                         {
 411
 412                                                 add_obj_to_list(stats.st_dev,stats.st_ino,newObj);
 413
 414                                                 if(S_ISLNK(stats.st_mode))
 415                                                 {
 416
 417                                                         char symname[500];
 418
 419                                                         memset(symname,0, sizeof(symname));
 420
 421                                                         if (readlink(full_name,symname,sizeof(symname) -1) < 0)
 422                                                         {
 423                                                                 warn("readlink");
 424                                                         }
 425                                                         else
 426                                                         {
 427                                                                 printf("symlink to \"%s\"\n",symname);
 428                                                                 write_object_header(newObj, YAFFS_OBJECT_TYPE_SYMLINK, &stats, parent, entry->d_name, -1, symname);
 429                                                         }
 430                                                 }
 431                                                 else if(S_ISREG(stats.st_mode))
 432                                                 {
 433                                                         printf("file, ");
 434                                                         if(write_object_header(newObj, YAFFS_OBJECT_TYPE_FILE, &stats, parent, entry->d_name, -1, NULL) == 0)
 435                                                         {
 436                                                                 int h;
 437                                                                 u8 bytes[chunkSize];
 438                                                                 int n_bytes;
 439                                                                 int chunk = 0;
 440
 441                                                                 h = open(full_name,O_RDONLY);
 442                                                                 if(h >= 0)
 443                                                                 {
 444                                                                         memset(bytes,0xff,sizeof(bytes));
 445                                                                         while((n_bytes = read(h,bytes,sizeof(bytes))) > 0)
 446                                                                         {
 447                                                                                 chunk++;
 448                                                                                 write_chunk(bytes,newObj,chunk,n_bytes);
 449                                                                                 memset(bytes,0xff,sizeof(bytes));
 450                                                                         }
 451                                                                         if(n_bytes < 0)
 452                                                                            warn("read");
 453
 454                                                                         printf("%d data chunks written\n",chunk);
 455                                                                         close(h);
 456                                                                 }
 457                                                                 else
 458                                                                 {
 459                                                                         warn("open");
 460                                                                 }
 461
 462                                                         }
 463
 464                                                 }
 465                                                 else if(S_ISSOCK(stats.st_mode))
 466                                                 {
 467                                                         printf("socket\n");
 468                                                         write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 469                                                 }
 470                                                 else if(S_ISFIFO(stats.st_mode))
 471                                                 {
 472                                                         printf("fifo\n");
 473                                                         write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 474                                                 }
 475                                                 else if(S_ISCHR(stats.st_mode))
 476                                                 {
 477                                                         printf("character device\n");
 478                                                         write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 479                                                 }
 480                                                 else if(S_ISBLK(stats.st_mode))
 481                                                 {
 482                                                         printf("block device\n");
 483                                                         write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
 484                                                 }
 485                                                 else if(S_ISDIR(stats.st_mode))
 486                                                 {
 487                                                         printf("directory\n");
 488                                                         if (write_object_header(newObj, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, parent, entry->d_name, -1, NULL) == 0)
 489                                                                 process_directory(newObj,full_name);
 490                                                 }
 491                                         }
 492                                 }
 493                                 else
 494                                 {
 495                                         fprintf(stderr, "%s: unhandled type\n", full_name);
 496                                         error |= 2;
 497                                         savedErrno = EINVAL;
 498                                 }
 499                         }
 500                 }
 501                 closedir(dir);
 502         }
 503
 504         return 0;
 505
 506 }
 507
 508
 509 int main(int argc, char *argv[])
 510 {
 511         struct stat stats;
 512
 513         printf("mkyaffs2image: image building tool for YAFFS2 built "__DATE__"\n");
 514
 515         if(argc < 3)
 516         {
 517                 printf("usage: mkyaffs2image dir image_file [convert]\n");
 518                 printf("           dir        the directory tree to be converted\n");
 519                 printf("           image_file the output file to hold the image\n");
 520         printf("           'convert'  produce a big-endian image from a little-endian machine\n");
 521                 exit(1);
 522         }
 523
 524     if ((argc == 4) && (!strncmp(argv[3], "convert", strlen("convert"))))
 525     {
 526         convert_endian = 1;
 527     }
 528
 529         if(stat(argv[1],&stats) < 0)
 530         {
 531                 printf("Could not stat %s\n",argv[1]);
 532                 exit(1);
 533         }
 534
 535         if(!S_ISDIR(stats.st_mode))
 536         {
 537                 printf(" %s is not a directory\n",argv[1]);
 538                 exit(1);
 539         }
 540
 541         outFile = open(argv[2],O_CREAT | O_TRUNC | O_WRONLY, S_IREAD | S_IWRITE);
 542
 543
 544         if(outFile < 0)
 545         {
 546                 printf("Could not open output file %s\n",argv[2]);
 547                 exit(1);
 548         }
 549
 550         printf("Processing directory %s into image file %s\n",argv[1],argv[2]);
 551         process_directory(YAFFS_OBJECTID_ROOT,argv[1]);
 552
 553         pad_image();
 554
 555         close(outFile);
 556
 557         if(error)
 558         {
 559                 errno = savedErrno;
 560                 perror("operation incomplete");
 561         }
 562         else
 563         {
 564                 printf("Operation complete.\n"
 565                        "%d objects in %d directories\n"
 566                        "%d NAND pages\n",n_obj, nDirectories, nPages);
 567         }
 568
 569         exit(error);
 570 }
 571