fs/jffs2/jffs2_1pass.c

   1 /*
   2 -------------------------------------------------------------------------
   3  * Filename:      jffs2.c
   4  * Version:       $Id: jffs2_1pass.c,v 1.7 2002/01/25 01:56:47 nyet Exp $
   5  * Copyright:     Copyright (C) 2001, Russ Dill
   6  * Author:        Russ Dill <Russ.Dill@asu.edu>
   7  * Description:   Module to load kernel from jffs2
   8  *-----------------------------------------------------------------------*/
   9 /*
  10  * some portions of this code are taken from jffs2, and as such, the
  11  * following copyright notice is included.
  12  *
  13  * JFFS2 -- Journalling Flash File System, Version 2.
  14  *
  15  * Copyright (C) 2001 Red Hat, Inc.
  16  *
  17  * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
  18  *
  19  * The original JFFS, from which the design for JFFS2 was derived,
  20  * was designed and implemented by Axis Communications AB.
  21  *
  22  * The contents of this file are subject to the Red Hat eCos Public
  23  * License Version 1.1 (the "Licence"); you may not use this file
  24  * except in compliance with the Licence.  You may obtain a copy of
  25  * the Licence at http://www.redhat.com/
  26  *
  27  * Software distributed under the Licence is distributed on an "AS IS"
  28  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
  29  * See the Licence for the specific language governing rights and
  30  * limitations under the Licence.
  31  *
  32  * The Original Code is JFFS2 - Journalling Flash File System, version 2
  33  *
  34  * Alternatively, the contents of this file may be used under the
  35  * terms of the GNU General Public License version 2 (the "GPL"), in
  36  * which case the provisions of the GPL are applicable instead of the
  37  * above.  If you wish to allow the use of your version of this file
  38  * only under the terms of the GPL and not to allow others to use your
  39  * version of this file under the RHEPL, indicate your decision by
  40  * deleting the provisions above and replace them with the notice and
  41  * other provisions required by the GPL.  If you do not delete the
  42  * provisions above, a recipient may use your version of this file
  43  * under either the RHEPL or the GPL.
  44  *
  45  * $Id: jffs2_1pass.c,v 1.7 2002/01/25 01:56:47 nyet Exp $
  46  *
  47  */
  48
  49 /* Ok, so anyone who knows the jffs2 code will probably want to get a papar
  50  * bag to throw up into before reading this code. I looked through the jffs2
  51  * code, the caching scheme is very elegant. I tried to keep the version
  52  * for a bootloader as small and simple as possible. Instead of worring about
  53  * unneccesary data copies, node scans, etc, I just optimized for the known
  54  * common case, a kernel, which looks like:
  55  *      (1) most pages are 4096 bytes
  56  *      (2) version numbers are somewhat sorted in acsending order
  57  *      (3) multiple compressed blocks making up one page is uncommon
  58  *
  59  * So I create a linked list of decending version numbers (insertions at the
  60  * head), and then for each page, walk down the list, until a matching page
  61  * with 4096 bytes is found, and then decompress the watching pages in
  62  * reverse order.
  63  *
  64  */
  65
  66 /*
  67  * Adapted by Nye Liu <nyet@zumanetworks.com> and
  68  * Rex Feany <rfeany@zumanetworks.com>
  69  * on Jan/2002 for U-Boot.
  70  *
  71  * Clipped out all the non-1pass functions, cleaned up warnings,
  72  * wrappers, etc. No major changes to the code.
  73  * Please, he really means it when he said have a paper bag
  74  * handy. We needed it ;).
  75  *
  76  */
  77
  78 /*
  79  * Bugfixing by Kai-Uwe Bloem <kai-uwe.bloem@auerswald.de>, (C) Mar/2003
  80  *
  81  * - overhaul of the memory management. Removed much of the "paper-bagging"
  82  *   in that part of the code, fixed several bugs, now frees memory when
  83  *   partition is changed.
  84  *   It's still ugly :-(
  85  * - fixed a bug in jffs2_1pass_read_inode where the file length calculation
  86  *   was incorrect. Removed a bit of the paper-bagging as well.
  87  * - removed double crc calculation for fragment headers in jffs2_private.h
  88  *   for speedup.
  89  * - scan_empty rewritten in a more "standard" manner (non-paperbag, that is).
  90  * - spinning wheel now spins depending on how much memory has been scanned
  91  * - lots of small changes all over the place to "improve" readability.
  92  * - implemented fragment sorting to ensure that the newest data is copied
  93  *   if there are multiple copies of fragments for a certain file offset.
  94  *
  95  * The fragment sorting feature must be enabled by CONFIG_SYS_JFFS2_SORT_FRAGMENTS.
  96  * Sorting is done while adding fragments to the lists, which is more or less a
  97  * bubble sort. This takes a lot of time, and is most probably not an issue if
  98  * the boot filesystem is always mounted readonly.
  99  *
 100  * You should define it if the boot filesystem is mounted writable, and updates
 101  * to the boot files are done by copying files to that filesystem.
 102  *
 103  *
 104  * There's a big issue left: endianess is completely ignored in this code. Duh!
 105  *
 106  *
 107  * You still should have paper bags at hand :-(. The code lacks more or less
 108  * any comment, and is still arcane and difficult to read in places. As this
 109  * might be incompatible with any new code from the jffs2 maintainers anyway,
 110  * it should probably be dumped and replaced by something like jffs2reader!
 111  */
 112
 113
 114 #include <common.h>
 115 #include <config.h>
 116 #include <malloc.h>
 117 #include <linux/stat.h>
 118 #include <linux/time.h>
 119 #include <watchdog.h>
 120 #include <jffs2/jffs2.h>
 121 #include <jffs2/jffs2_1pass.h>
 122 #include <linux/mtd/compat.h>
 123 #include <asm/errno.h>
 124
 125 #include "jffs2_private.h"
 126
 127
 128 #define NODE_CHUNK      1024    /* size of memory allocation chunk in b_nodes */
 129 #define SPIN_BLKSIZE    18      /* spin after having scanned 1<<BLKSIZE bytes */
 130
 131 /* Debugging switches */
 132 #undef  DEBUG_DIRENTS           /* print directory entry list after scan */
 133 #undef  DEBUG_FRAGMENTS         /* print fragment list after scan */
 134 #undef  DEBUG                   /* enable debugging messages */
 135
 136
 137 #ifdef  DEBUG
 138 # define DEBUGF(fmt,args...)    printf(fmt ,##args)
 139 #else
 140 # define DEBUGF(fmt,args...)
 141 #endif
 142
 143 #include "summary.h"
 144
 145 /* keeps pointer to currentlu processed partition */
 146 static struct part_info *current_part;
 147
 148 #if (defined(CONFIG_JFFS2_NAND) && \
 149      defined(CONFIG_CMD_NAND) )
 150 #include <nand.h>
 151 /*
 152  * Support for jffs2 on top of NAND-flash
 153  *
 154  * NAND memory isn't mapped in processor's address space,
 155  * so data should be fetched from flash before
 156  * being processed. This is exactly what functions declared
 157  * here do.
 158  *
 159  */
 160
 161 #define NAND_PAGE_SIZE 512
 162 #define NAND_PAGE_SHIFT 9
 163 #define NAND_PAGE_MASK (~(NAND_PAGE_SIZE-1))
 164
 165 #ifndef NAND_CACHE_PAGES
 166 #define NAND_CACHE_PAGES 16
 167 #endif
 168 #define NAND_CACHE_SIZE (NAND_CACHE_PAGES*NAND_PAGE_SIZE)
 169
 170 static u8* nand_cache = NULL;
 171 static u32 nand_cache_off = (u32)-1;
 172
 173 static int read_nand_cached(u32 off, u32 size, u_char *buf)
 174 {
 175         struct mtdids *id = current_part->dev->id;
 176         u32 bytes_read = 0;
 177         size_t retlen;
 178         int cpy_bytes;
 179
 180         while (bytes_read < size) {
 181                 if ((off + bytes_read < nand_cache_off) ||
 182                     (off + bytes_read >= nand_cache_off+NAND_CACHE_SIZE)) {
 183                         nand_cache_off = (off + bytes_read) & NAND_PAGE_MASK;
 184                         if (!nand_cache) {
 185                                 /* This memory never gets freed but 'cause
 186                                    it's a bootloader, nobody cares */
 187                                 nand_cache = malloc(NAND_CACHE_SIZE);
 188                                 if (!nand_cache) {
 189                                         printf("read_nand_cached: can't alloc cache size %d bytes\n",
 190                                                NAND_CACHE_SIZE);
 191                                         return -1;
 192                                 }
 193                         }
 194
 195                         retlen = NAND_CACHE_SIZE;
 196                         if (nand_read(&nand_info[id->num], nand_cache_off,
 197                                                 &retlen, nand_cache) != 0 ||
 198                                         retlen != NAND_CACHE_SIZE) {
 199                                 printf("read_nand_cached: error reading nand off %#x size %d bytes\n",
 200                                                 nand_cache_off, NAND_CACHE_SIZE);
 201                                 return -1;
 202                         }
 203                 }
 204                 cpy_bytes = nand_cache_off + NAND_CACHE_SIZE - (off + bytes_read);
 205                 if (cpy_bytes > size - bytes_read)
 206                         cpy_bytes = size - bytes_read;
 207                 memcpy(buf + bytes_read,
 208                        nand_cache + off + bytes_read - nand_cache_off,
 209                        cpy_bytes);
 210                 bytes_read += cpy_bytes;
 211         }
 212         return bytes_read;
 213 }
 214
 215 static void *get_fl_mem_nand(u32 off, u32 size, void *ext_buf)
 216 {
 217         u_char *buf = ext_buf ? (u_char*)ext_buf : (u_char*)malloc(size);
 218
 219         if (NULL == buf) {
 220                 printf("get_fl_mem_nand: can't alloc %d bytes\n", size);
 221                 return NULL;
 222         }
 223         if (read_nand_cached(off, size, buf) < 0) {
 224                 if (!ext_buf)
 225                         free(buf);
 226                 return NULL;
 227         }
 228
 229         return buf;
 230 }
 231
 232 static void *get_node_mem_nand(u32 off, void *ext_buf)
 233 {
 234         struct jffs2_unknown_node node;
 235         void *ret = NULL;
 236
 237         if (NULL == get_fl_mem_nand(off, sizeof(node), &node))
 238                 return NULL;
 239
 240         if (!(ret = get_fl_mem_nand(off, node.magic ==
 241                                JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
 242                                ext_buf))) {
 243                 printf("off = %#x magic %#x type %#x node.totlen = %d\n",
 244                        off, node.magic, node.nodetype, node.totlen);
 245         }
 246         return ret;
 247 }
 248
 249 static void put_fl_mem_nand(void *buf)
 250 {
 251         free(buf);
 252 }
 253 #endif
 254
 255 #if defined(CONFIG_CMD_ONENAND)
 256
 257 #include <linux/mtd/mtd.h>
 258 #include <linux/mtd/onenand.h>
 259 #include <onenand_uboot.h>
 260
 261 #define ONENAND_PAGE_SIZE 2048
 262 #define ONENAND_PAGE_SHIFT 11
 263 #define ONENAND_PAGE_MASK (~(ONENAND_PAGE_SIZE-1))
 264
 265 #ifndef ONENAND_CACHE_PAGES
 266 #define ONENAND_CACHE_PAGES 4
 267 #endif
 268 #define ONENAND_CACHE_SIZE (ONENAND_CACHE_PAGES*ONENAND_PAGE_SIZE)
 269
 270 static u8* onenand_cache;
 271 static u32 onenand_cache_off = (u32)-1;
 272
 273 static int read_onenand_cached(u32 off, u32 size, u_char *buf)
 274 {
 275         u32 bytes_read = 0;
 276         size_t retlen;
 277         int cpy_bytes;
 278
 279         while (bytes_read < size) {
 280                 if ((off + bytes_read < onenand_cache_off) ||
 281                     (off + bytes_read >= onenand_cache_off + ONENAND_CACHE_SIZE)) {
 282                         onenand_cache_off = (off + bytes_read) & ONENAND_PAGE_MASK;
 283                         if (!onenand_cache) {
 284                                 /* This memory never gets freed but 'cause
 285                                    it's a bootloader, nobody cares */
 286                                 onenand_cache = malloc(ONENAND_CACHE_SIZE);
 287                                 if (!onenand_cache) {
 288                                         printf("read_onenand_cached: can't alloc cache size %d bytes\n",
 289                                                ONENAND_CACHE_SIZE);
 290                                         return -1;
 291                                 }
 292                         }
 293
 294                         retlen = ONENAND_CACHE_SIZE;
 295                         if (onenand_read(&onenand_mtd, onenand_cache_off, retlen,
 296                                                 &retlen, onenand_cache) != 0 ||
 297                                         retlen != ONENAND_CACHE_SIZE) {
 298                                 printf("read_onenand_cached: error reading nand off %#x size %d bytes\n",
 299                                         onenand_cache_off, ONENAND_CACHE_SIZE);
 300                                 return -1;
 301                         }
 302                 }
 303                 cpy_bytes = onenand_cache_off + ONENAND_CACHE_SIZE - (off + bytes_read);
 304                 if (cpy_bytes > size - bytes_read)
 305                         cpy_bytes = size - bytes_read;
 306                 memcpy(buf + bytes_read,
 307                        onenand_cache + off + bytes_read - onenand_cache_off,
 308                        cpy_bytes);
 309                 bytes_read += cpy_bytes;
 310         }
 311         return bytes_read;
 312 }
 313
 314 static void *get_fl_mem_onenand(u32 off, u32 size, void *ext_buf)
 315 {
 316         u_char *buf = ext_buf ? (u_char *)ext_buf : (u_char *)malloc(size);
 317
 318         if (NULL == buf) {
 319                 printf("get_fl_mem_onenand: can't alloc %d bytes\n", size);
 320                 return NULL;
 321         }
 322         if (read_onenand_cached(off, size, buf) < 0) {
 323                 if (!ext_buf)
 324                         free(buf);
 325                 return NULL;
 326         }
 327
 328         return buf;
 329 }
 330
 331 static void *get_node_mem_onenand(u32 off, void *ext_buf)
 332 {
 333         struct jffs2_unknown_node node;
 334         void *ret = NULL;
 335
 336         if (NULL == get_fl_mem_onenand(off, sizeof(node), &node))
 337                 return NULL;
 338
 339         ret = get_fl_mem_onenand(off, node.magic ==
 340                         JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
 341                         ext_buf);
 342         if (!ret) {
 343                 printf("off = %#x magic %#x type %#x node.totlen = %d\n",
 344                        off, node.magic, node.nodetype, node.totlen);
 345         }
 346         return ret;
 347 }
 348
 349
 350 static void put_fl_mem_onenand(void *buf)
 351 {
 352         free(buf);
 353 }
 354 #endif
 355
 356
 357 #if defined(CONFIG_CMD_FLASH)
 358 /*
 359  * Support for jffs2 on top of NOR-flash
 360  *
 361  * NOR flash memory is mapped in processor's address space,
 362  * just return address.
 363  */
 364 static inline void *get_fl_mem_nor(u32 off, u32 size, void *ext_buf)
 365 {
 366         u32 addr = off;
 367         struct mtdids *id = current_part->dev->id;
 368
 369         extern flash_info_t flash_info[];
 370         flash_info_t *flash = &flash_info[id->num];
 371
 372         addr += flash->start[0];
 373         if (ext_buf) {
 374                 memcpy(ext_buf, (void *)addr, size);
 375                 return ext_buf;
 376         }
 377         return (void*)addr;
 378 }
 379
 380 static inline void *get_node_mem_nor(u32 off, void *ext_buf)
 381 {
 382         struct jffs2_unknown_node *pNode;
 383
 384         /* pNode will point directly to flash - don't provide external buffer
 385            and don't care about size */
 386         pNode = get_fl_mem_nor(off, 0, NULL);
 387         return (void *)get_fl_mem_nor(off, pNode->magic == JFFS2_MAGIC_BITMASK ?
 388                         pNode->totlen : sizeof(*pNode), ext_buf);
 389 }
 390 #endif
 391
 392
 393 /*
 394  * Generic jffs2 raw memory and node read routines.
 395  *
 396  */
 397 static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf)
 398 {
 399         struct mtdids *id = current_part->dev->id;
 400
 401         switch(id->type) {
 402 #if defined(CONFIG_CMD_FLASH)
 403         case MTD_DEV_TYPE_NOR:
 404                 return get_fl_mem_nor(off, size, ext_buf);
 405                 break;
 406 #endif
 407 #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
 408         case MTD_DEV_TYPE_NAND:
 409                 return get_fl_mem_nand(off, size, ext_buf);
 410                 break;
 411 #endif
 412 #if defined(CONFIG_CMD_ONENAND)
 413         case MTD_DEV_TYPE_ONENAND:
 414                 return get_fl_mem_onenand(off, size, ext_buf);
 415                 break;
 416 #endif
 417         default:
 418                 printf("get_fl_mem: unknown device type, " \
 419                         "using raw offset!\n");
 420         }
 421         return (void*)off;
 422 }
 423
 424 static inline void *get_node_mem(u32 off, void *ext_buf)
 425 {
 426         struct mtdids *id = current_part->dev->id;
 427
 428         switch(id->type) {
 429 #if defined(CONFIG_CMD_FLASH)
 430         case MTD_DEV_TYPE_NOR:
 431                 return get_node_mem_nor(off, ext_buf);
 432                 break;
 433 #endif
 434 #if defined(CONFIG_JFFS2_NAND) && \
 435     defined(CONFIG_CMD_NAND)
 436         case MTD_DEV_TYPE_NAND:
 437                 return get_node_mem_nand(off, ext_buf);
 438                 break;
 439 #endif
 440 #if defined(CONFIG_CMD_ONENAND)
 441         case MTD_DEV_TYPE_ONENAND:
 442                 return get_node_mem_onenand(off, ext_buf);
 443                 break;
 444 #endif
 445         default:
 446                 printf("get_fl_mem: unknown device type, " \
 447                         "using raw offset!\n");
 448         }
 449         return (void*)off;
 450 }
 451
 452 static inline void put_fl_mem(void *buf, void *ext_buf)
 453 {
 454         struct mtdids *id = current_part->dev->id;
 455
 456         /* If buf is the same as ext_buf, it was provided by the caller -
 457            we shouldn't free it then. */
 458         if (buf == ext_buf)
 459                 return;
 460         switch (id->type) {
 461 #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
 462         case MTD_DEV_TYPE_NAND:
 463                 return put_fl_mem_nand(buf);
 464 #endif
 465 #if defined(CONFIG_CMD_ONENAND)
 466         case MTD_DEV_TYPE_ONENAND:
 467                 return put_fl_mem_onenand(buf);
 468 #endif
 469         }
 470 }
 471
 472 /* Compression names */
 473 static char *compr_names[] = {
 474         "NONE",
 475         "ZERO",
 476         "RTIME",
 477         "RUBINMIPS",
 478         "COPY",
 479         "DYNRUBIN",
 480         "ZLIB",
 481 #if defined(CONFIG_JFFS2_LZO)
 482         "LZO",
 483 #endif
 484 };
 485
 486 /* Memory management */
 487 struct mem_block {
 488         u32     index;
 489         struct mem_block *next;
 490         struct b_node nodes[NODE_CHUNK];
 491 };
 492
 493
 494 static void
 495 free_nodes(struct b_list *list)
 496 {
 497         while (list->listMemBase != NULL) {
 498                 struct mem_block *next = list->listMemBase->next;
 499                 free( list->listMemBase );
 500                 list->listMemBase = next;
 501         }
 502 }
 503
 504 static struct b_node *
 505 add_node(struct b_list *list)
 506 {
 507         u32 index = 0;
 508         struct mem_block *memBase;
 509         struct b_node *b;
 510
 511         memBase = list->listMemBase;
 512         if (memBase != NULL)
 513                 index = memBase->index;
 514 #if 0
 515         putLabeledWord("add_node: index = ", index);
 516         putLabeledWord("add_node: memBase = ", list->listMemBase);
 517 #endif
 518
 519         if (memBase == NULL || index >= NODE_CHUNK) {
 520                 /* we need more space before we continue */
 521                 memBase = mmalloc(sizeof(struct mem_block));
 522                 if (memBase == NULL) {
 523                         putstr("add_node: malloc failed\n");
 524                         return NULL;
 525                 }
 526                 memBase->next = list->listMemBase;
 527                 index = 0;
 528 #if 0
 529                 putLabeledWord("add_node: alloced a new membase at ", *memBase);
 530 #endif
 531
 532         }
 533         /* now we have room to add it. */
 534         b = &memBase->nodes[index];
 535         index ++;
 536
 537         memBase->index = index;
 538         list->listMemBase = memBase;
 539         list->listCount++;
 540         return b;
 541 }
 542
 543 static struct b_node *
 544 insert_node(struct b_list *list, u32 offset)
 545 {
 546         struct b_node *new;
 547 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 548         struct b_node *b, *prev;
 549 #endif
 550
 551         if (!(new = add_node(list))) {
 552                 putstr("add_node failed!\r\n");
 553                 return NULL;
 554         }
 555         new->offset = offset;
 556
 557 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 558         if (list->listTail != NULL && list->listCompare(new, list->listTail))
 559                 prev = list->listTail;
 560         else if (list->listLast != NULL && list->listCompare(new, list->listLast))
 561                 prev = list->listLast;
 562         else
 563                 prev = NULL;
 564
 565         for (b = (prev ? prev->next : list->listHead);
 566              b != NULL && list->listCompare(new, b);
 567              prev = b, b = b->next) {
 568                 list->listLoops++;
 569         }
 570         if (b != NULL)
 571                 list->listLast = prev;
 572
 573         if (b != NULL) {
 574                 new->next = b;
 575                 if (prev != NULL)
 576                         prev->next = new;
 577                 else
 578                         list->listHead = new;
 579         } else
 580 #endif
 581         {
 582                 new->next = (struct b_node *) NULL;
 583                 if (list->listTail != NULL) {
 584                         list->listTail->next = new;
 585                         list->listTail = new;
 586                 } else {
 587                         list->listTail = list->listHead = new;
 588                 }
 589         }
 590
 591         return new;
 592 }
 593
 594 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 595 /* Sort data entries with the latest version last, so that if there
 596  * is overlapping data the latest version will be used.
 597  */
 598 static int compare_inodes(struct b_node *new, struct b_node *old)
 599 {
 600         struct jffs2_raw_inode ojNew;
 601         struct jffs2_raw_inode ojOld;
 602         struct jffs2_raw_inode *jNew =
 603                 (struct jffs2_raw_inode *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew);
 604         struct jffs2_raw_inode *jOld =
 605                 (struct jffs2_raw_inode *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld);
 606
 607         return jNew->version > jOld->version;
 608 }
 609
 610 /* Sort directory entries so all entries in the same directory
 611  * with the same name are grouped together, with the latest version
 612  * last. This makes it easy to eliminate all but the latest version
 613  * by marking the previous version dead by setting the inode to 0.
 614  */
 615 static int compare_dirents(struct b_node *new, struct b_node *old)
 616 {
 617         struct jffs2_raw_dirent ojNew;
 618         struct jffs2_raw_dirent ojOld;
 619         struct jffs2_raw_dirent *jNew =
 620                 (struct jffs2_raw_dirent *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew);
 621         struct jffs2_raw_dirent *jOld =
 622                 (struct jffs2_raw_dirent *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld);
 623         int cmp;
 624
 625         /* ascending sort by pino */
 626         if (jNew->pino != jOld->pino)
 627                 return jNew->pino > jOld->pino;
 628
 629         /* pino is the same, so use ascending sort by nsize, so
 630          * we don't do strncmp unless we really must.
 631          */
 632         if (jNew->nsize != jOld->nsize)
 633                 return jNew->nsize > jOld->nsize;
 634
 635         /* length is also the same, so use ascending sort by name
 636          */
 637         cmp = strncmp((char *)jNew->name, (char *)jOld->name, jNew->nsize);
 638         if (cmp != 0)
 639                 return cmp > 0;
 640
 641         /* we have duplicate names in this directory, so use ascending
 642          * sort by version
 643          */
 644         if (jNew->version > jOld->version) {
 645                 /* since jNew is newer, we know jOld is not valid, so
 646                  * mark it with inode 0 and it will not be used
 647                  */
 648                 jOld->ino = 0;
 649                 return 1;
 650         }
 651
 652         return 0;
 653 }
 654 #endif
 655
 656 void
 657 jffs2_free_cache(struct part_info *part)
 658 {
 659         struct b_lists *pL;
 660
 661         if (part->jffs2_priv != NULL) {
 662                 pL = (struct b_lists *)part->jffs2_priv;
 663                 free_nodes(&pL->frag);
 664                 free_nodes(&pL->dir);
 665                 free(pL->readbuf);
 666                 free(pL);
 667         }
 668 }
 669
 670 static u32
 671 jffs_init_1pass_list(struct part_info *part)
 672 {
 673         struct b_lists *pL;
 674
 675         jffs2_free_cache(part);
 676
 677         if (NULL != (part->jffs2_priv = malloc(sizeof(struct b_lists)))) {
 678                 pL = (struct b_lists *)part->jffs2_priv;
 679
 680                 memset(pL, 0, sizeof(*pL));
 681 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 682                 pL->dir.listCompare = compare_dirents;
 683                 pL->frag.listCompare = compare_inodes;
 684 #endif
 685         }
 686         return 0;
 687 }
 688
 689 /* find the inode from the slashless name given a parent */
 690 static long
 691 jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
 692 {
 693         struct b_node *b;
 694         struct jffs2_raw_inode *jNode;
 695         u32 totalSize = 0;
 696         u32 latestVersion = 0;
 697         uchar *lDest;
 698         uchar *src;
 699         long ret;
 700         int i;
 701         u32 counter = 0;
 702 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 703         /* Find file size before loading any data, so fragments that
 704          * start past the end of file can be ignored. A fragment
 705          * that is partially in the file is loaded, so extra data may
 706          * be loaded up to the next 4K boundary above the file size.
 707          * This shouldn't cause trouble when loading kernel images, so
 708          * we will live with it.
 709          */
 710         for (b = pL->frag.listHead; b != NULL; b = b->next) {
 711                 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
 712                         sizeof(struct jffs2_raw_inode), pL->readbuf);
 713                 if ((inode == jNode->ino)) {
 714                         /* get actual file length from the newest node */
 715                         if (jNode->version >= latestVersion) {
 716                                 totalSize = jNode->isize;
 717                                 latestVersion = jNode->version;
 718                         }
 719                 }
 720                 put_fl_mem(jNode, pL->readbuf);
 721         }
 722 #endif
 723
 724         for (b = pL->frag.listHead; b != NULL; b = b->next) {
 725                 jNode = (struct jffs2_raw_inode *) get_node_mem(b->offset,
 726                                                                 pL->readbuf);
 727                 if ((inode == jNode->ino)) {
 728 #if 0
 729                         putLabeledWord("\r\n\r\nread_inode: totlen = ", jNode->totlen);
 730                         putLabeledWord("read_inode: inode = ", jNode->ino);
 731                         putLabeledWord("read_inode: version = ", jNode->version);
 732                         putLabeledWord("read_inode: isize = ", jNode->isize);
 733                         putLabeledWord("read_inode: offset = ", jNode->offset);
 734                         putLabeledWord("read_inode: csize = ", jNode->csize);
 735                         putLabeledWord("read_inode: dsize = ", jNode->dsize);
 736                         putLabeledWord("read_inode: compr = ", jNode->compr);
 737                         putLabeledWord("read_inode: usercompr = ", jNode->usercompr);
 738                         putLabeledWord("read_inode: flags = ", jNode->flags);
 739 #endif
 740
 741 #ifndef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 742                         /* get actual file length from the newest node */
 743                         if (jNode->version >= latestVersion) {
 744                                 totalSize = jNode->isize;
 745                                 latestVersion = jNode->version;
 746                         }
 747 #endif
 748
 749                         if(dest) {
 750                                 src = ((uchar *) jNode) + sizeof(struct jffs2_raw_inode);
 751                                 /* ignore data behind latest known EOF */
 752                                 if (jNode->offset > totalSize) {
 753                                         put_fl_mem(jNode, pL->readbuf);
 754                                         continue;
 755                                 }
 756                                 if (b->datacrc == CRC_UNKNOWN)
 757                                         b->datacrc = data_crc(jNode) ?
 758                                                 CRC_OK : CRC_BAD;
 759                                 if (b->datacrc == CRC_BAD) {
 760                                         put_fl_mem(jNode, pL->readbuf);
 761                                         continue;
 762                                 }
 763
 764                                 lDest = (uchar *) (dest + jNode->offset);
 765 #if 0
 766                                 putLabeledWord("read_inode: src = ", src);
 767                                 putLabeledWord("read_inode: dest = ", lDest);
 768 #endif
 769                                 switch (jNode->compr) {
 770                                 case JFFS2_COMPR_NONE:
 771                                         ret = (unsigned long) ldr_memcpy(lDest, src, jNode->dsize);
 772                                         break;
 773                                 case JFFS2_COMPR_ZERO:
 774                                         ret = 0;
 775                                         for (i = 0; i < jNode->dsize; i++)
 776                                                 *(lDest++) = 0;
 777                                         break;
 778                                 case JFFS2_COMPR_RTIME:
 779                                         ret = 0;
 780                                         rtime_decompress(src, lDest, jNode->csize, jNode->dsize);
 781                                         break;
 782                                 case JFFS2_COMPR_DYNRUBIN:
 783                                         /* this is slow but it works */
 784                                         ret = 0;
 785                                         dynrubin_decompress(src, lDest, jNode->csize, jNode->dsize);
 786                                         break;
 787                                 case JFFS2_COMPR_ZLIB:
 788                                         ret = zlib_decompress(src, lDest, jNode->csize, jNode->dsize);
 789                                         break;
 790 #if defined(CONFIG_JFFS2_LZO)
 791                                 case JFFS2_COMPR_LZO:
 792                                         ret = lzo_decompress(src, lDest, jNode->csize, jNode->dsize);
 793                                         break;
 794 #endif
 795                                 default:
 796                                         /* unknown */
 797                                         putLabeledWord("UNKNOWN COMPRESSION METHOD = ", jNode->compr);
 798                                         put_fl_mem(jNode, pL->readbuf);
 799                                         return -1;
 800                                         break;
 801                                 }
 802                         }
 803
 804 #if 0
 805                         putLabeledWord("read_inode: totalSize = ", totalSize);
 806                         putLabeledWord("read_inode: compr ret = ", ret);
 807 #endif
 808                 }
 809                 counter++;
 810                 put_fl_mem(jNode, pL->readbuf);
 811         }
 812
 813 #if 0
 814         putLabeledWord("read_inode: returning = ", totalSize);
 815 #endif
 816         return totalSize;
 817 }
 818
 819 /* find the inode from the slashless name given a parent */
 820 static u32
 821 jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino)
 822 {
 823         struct b_node *b;
 824         struct jffs2_raw_dirent *jDir;
 825         int len;
 826         u32 counter;
 827         u32 version = 0;
 828         u32 inode = 0;
 829
 830         /* name is assumed slash free */
 831         len = strlen(name);
 832
 833         counter = 0;
 834         /* we need to search all and return the inode with the highest version */
 835         for(b = pL->dir.listHead; b; b = b->next, counter++) {
 836                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
 837                                                                 pL->readbuf);
 838                 if ((pino == jDir->pino) && (len == jDir->nsize) &&
 839                     (jDir->ino) &&      /* 0 for unlink */
 840                     (!strncmp((char *)jDir->name, name, len))) {        /* a match */
 841                         if (jDir->version < version) {
 842                                 put_fl_mem(jDir, pL->readbuf);
 843                                 continue;
 844                         }
 845
 846                         if (jDir->version == version && inode != 0) {
 847                                 /* I'm pretty sure this isn't legal */
 848                                 putstr(" ** ERROR ** ");
 849                                 putnstr(jDir->name, jDir->nsize);
 850                                 putLabeledWord(" has dup version =", version);
 851                         }
 852                         inode = jDir->ino;
 853                         version = jDir->version;
 854                 }
 855 #if 0
 856                 putstr("\r\nfind_inode:p&l ->");
 857                 putnstr(jDir->name, jDir->nsize);
 858                 putstr("\r\n");
 859                 putLabeledWord("pino = ", jDir->pino);
 860                 putLabeledWord("nsize = ", jDir->nsize);
 861                 putLabeledWord("b = ", (u32) b);
 862                 putLabeledWord("counter = ", counter);
 863 #endif
 864                 put_fl_mem(jDir, pL->readbuf);
 865         }
 866         return inode;
 867 }
 868
 869 char *mkmodestr(unsigned long mode, char *str)
 870 {
 871         static const char *l = "xwr";
 872         int mask = 1, i;
 873         char c;
 874
 875         switch (mode & S_IFMT) {
 876                 case S_IFDIR:    str[0] = 'd'; break;
 877                 case S_IFBLK:    str[0] = 'b'; break;
 878                 case S_IFCHR:    str[0] = 'c'; break;
 879                 case S_IFIFO:    str[0] = 'f'; break;
 880                 case S_IFLNK:    str[0] = 'l'; break;
 881                 case S_IFSOCK:   str[0] = 's'; break;
 882                 case S_IFREG:    str[0] = '-'; break;
 883                 default:         str[0] = '?';
 884         }
 885
 886         for(i = 0; i < 9; i++) {
 887                 c = l[i%3];
 888                 str[9-i] = (mode & mask)?c:'-';
 889                 mask = mask<<1;
 890         }
 891
 892         if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
 893         if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
 894         if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
 895         str[10] = '\0';
 896         return str;
 897 }
 898
 899 static inline void dump_stat(struct stat *st, const char *name)
 900 {
 901         char str[20];
 902         char s[64], *p;
 903
 904         if (st->st_mtime == (time_t)(-1)) /* some ctimes really hate -1 */
 905                 st->st_mtime = 1;
 906
 907         ctime_r((time_t *)&st->st_mtime, s/*,64*/); /* newlib ctime doesn't have buflen */
 908
 909         if ((p = strchr(s,'\n')) != NULL) *p = '\0';
 910         if ((p = strchr(s,'\r')) != NULL) *p = '\0';
 911
 912 /*
 913         printf("%6lo %s %8ld %s %s\n", st->st_mode, mkmodestr(st->st_mode, str),
 914                 st->st_size, s, name);
 915 */
 916
 917         printf(" %s %8ld %s %s", mkmodestr(st->st_mode,str), st->st_size, s, name);
 918 }
 919
 920 static inline u32 dump_inode(struct b_lists * pL, struct jffs2_raw_dirent *d, struct jffs2_raw_inode *i)
 921 {
 922         char fname[256];
 923         struct stat st;
 924
 925         if(!d || !i) return -1;
 926
 927         strncpy(fname, (char *)d->name, d->nsize);
 928         fname[d->nsize] = '\0';
 929
 930         memset(&st,0,sizeof(st));
 931
 932         st.st_mtime = i->mtime;
 933         st.st_mode = i->mode;
 934         st.st_ino = i->ino;
 935         st.st_size = i->isize;
 936
 937         dump_stat(&st, fname);
 938
 939         if (d->type == DT_LNK) {
 940                 unsigned char *src = (unsigned char *) (&i[1]);
 941                 putstr(" -> ");
 942                 putnstr(src, (int)i->dsize);
 943         }
 944
 945         putstr("\r\n");
 946
 947         return 0;
 948 }
 949
 950 /* list inodes with the given pino */
 951 static u32
 952 jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino)
 953 {
 954         struct b_node *b;
 955         struct jffs2_raw_dirent *jDir;
 956
 957         for (b = pL->dir.listHead; b; b = b->next) {
 958                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
 959                                                                 pL->readbuf);
 960                 if ((pino == jDir->pino) && (jDir->ino)) { /* ino=0 -> unlink */
 961                         u32 i_version = 0;
 962                         struct jffs2_raw_inode ojNode;
 963                         struct jffs2_raw_inode *jNode, *i = NULL;
 964                         struct b_node *b2 = pL->frag.listHead;
 965
 966                         while (b2) {
 967                                 jNode = (struct jffs2_raw_inode *)
 968                                         get_fl_mem(b2->offset, sizeof(ojNode), &ojNode);
 969                                 if (jNode->ino == jDir->ino && jNode->version >= i_version) {
 970                                         i_version = jNode->version;
 971                                         if (i)
 972                                                 put_fl_mem(i, NULL);
 973
 974                                         if (jDir->type == DT_LNK)
 975                                                 i = get_node_mem(b2->offset,
 976                                                                  NULL);
 977                                         else
 978                                                 i = get_fl_mem(b2->offset,
 979                                                                sizeof(*i),
 980                                                                NULL);
 981                                 }
 982                                 b2 = b2->next;
 983                         }
 984
 985                         dump_inode(pL, jDir, i);
 986                         put_fl_mem(i, NULL);
 987                 }
 988                 put_fl_mem(jDir, pL->readbuf);
 989         }
 990         return pino;
 991 }
 992
 993 static u32
 994 jffs2_1pass_search_inode(struct b_lists * pL, const char *fname, u32 pino)
 995 {
 996         int i;
 997         char tmp[256];
 998         char working_tmp[256];
 999         char *c;
1000
1001         /* discard any leading slash */
1002         i = 0;
1003         while (fname[i] == '/')
1004                 i++;
1005         strcpy(tmp, &fname[i]);
1006
1007         while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
1008         {
1009                 strncpy(working_tmp, tmp, c - tmp);
1010                 working_tmp[c - tmp] = '\0';
1011 #if 0
1012                 putstr("search_inode: tmp = ");
1013                 putstr(tmp);
1014                 putstr("\r\n");
1015                 putstr("search_inode: wtmp = ");
1016                 putstr(working_tmp);
1017                 putstr("\r\n");
1018                 putstr("search_inode: c = ");
1019                 putstr(c);
1020                 putstr("\r\n");
1021 #endif
1022                 for (i = 0; i < strlen(c) - 1; i++)
1023                         tmp[i] = c[i + 1];
1024                 tmp[i] = '\0';
1025 #if 0
1026                 putstr("search_inode: post tmp = ");
1027                 putstr(tmp);
1028                 putstr("\r\n");
1029 #endif
1030
1031                 if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino))) {
1032                         putstr("find_inode failed for name=");
1033                         putstr(working_tmp);
1034                         putstr("\r\n");
1035                         return 0;
1036                 }
1037         }
1038         /* this is for the bare filename, directories have already been mapped */
1039         if (!(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
1040                 putstr("find_inode failed for name=");
1041                 putstr(tmp);
1042                 putstr("\r\n");
1043                 return 0;
1044         }
1045         return pino;
1046
1047 }
1048
1049 static u32
1050 jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
1051 {
1052         struct b_node *b;
1053         struct b_node *b2;
1054         struct jffs2_raw_dirent *jDir;
1055         struct jffs2_raw_inode *jNode;
1056         u8 jDirFoundType = 0;
1057         u32 jDirFoundIno = 0;
1058         u32 jDirFoundPino = 0;
1059         char tmp[256];
1060         u32 version = 0;
1061         u32 pino;
1062         unsigned char *src;
1063
1064         /* we need to search all and return the inode with the highest version */
1065         for(b = pL->dir.listHead; b; b = b->next) {
1066                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
1067                                                                 pL->readbuf);
1068                 if (ino == jDir->ino) {
1069                         if (jDir->version < version) {
1070                                 put_fl_mem(jDir, pL->readbuf);
1071                                 continue;
1072                         }
1073
1074                         if (jDir->version == version && jDirFoundType) {
1075                                 /* I'm pretty sure this isn't legal */
1076                                 putstr(" ** ERROR ** ");
1077                                 putnstr(jDir->name, jDir->nsize);
1078                                 putLabeledWord(" has dup version (resolve) = ",
1079                                         version);
1080                         }
1081
1082                         jDirFoundType = jDir->type;
1083                         jDirFoundIno = jDir->ino;
1084                         jDirFoundPino = jDir->pino;
1085                         version = jDir->version;
1086                 }
1087                 put_fl_mem(jDir, pL->readbuf);
1088         }
1089         /* now we found the right entry again. (shoulda returned inode*) */
1090         if (jDirFoundType != DT_LNK)
1091                 return jDirFoundIno;
1092
1093         /* it's a soft link so we follow it again. */
1094         b2 = pL->frag.listHead;
1095         while (b2) {
1096                 jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset,
1097                                                                 pL->readbuf);
1098                 if (jNode->ino == jDirFoundIno) {
1099                         src = (unsigned char *)jNode + sizeof(struct jffs2_raw_inode);
1100
1101 #if 0
1102                         putLabeledWord("\t\t dsize = ", jNode->dsize);
1103                         putstr("\t\t target = ");
1104                         putnstr(src, jNode->dsize);
1105                         putstr("\r\n");
1106 #endif
1107                         strncpy(tmp, (char *)src, jNode->dsize);
1108                         tmp[jNode->dsize] = '\0';
1109                         put_fl_mem(jNode, pL->readbuf);
1110                         break;
1111                 }
1112                 b2 = b2->next;
1113                 put_fl_mem(jNode, pL->readbuf);
1114         }
1115         /* ok so the name of the new file to find is in tmp */
1116         /* if it starts with a slash it is root based else shared dirs */
1117         if (tmp[0] == '/')
1118                 pino = 1;
1119         else
1120                 pino = jDirFoundPino;
1121
1122         return jffs2_1pass_search_inode(pL, tmp, pino);
1123 }
1124
1125 static u32
1126 jffs2_1pass_search_list_inodes(struct b_lists * pL, const char *fname, u32 pino)
1127 {
1128         int i;
1129         char tmp[256];
1130         char working_tmp[256];
1131         char *c;
1132
1133         /* discard any leading slash */
1134         i = 0;
1135         while (fname[i] == '/')
1136                 i++;
1137         strcpy(tmp, &fname[i]);
1138         working_tmp[0] = '\0';
1139         while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
1140         {
1141                 strncpy(working_tmp, tmp, c - tmp);
1142                 working_tmp[c - tmp] = '\0';
1143                 for (i = 0; i < strlen(c) - 1; i++)
1144                         tmp[i] = c[i + 1];
1145                 tmp[i] = '\0';
1146                 /* only a failure if we arent looking at top level */
1147                 if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino)) &&
1148                     (working_tmp[0])) {
1149                         putstr("find_inode failed for name=");
1150                         putstr(working_tmp);
1151                         putstr("\r\n");
1152                         return 0;
1153                 }
1154         }
1155
1156         if (tmp[0] && !(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
1157                 putstr("find_inode failed for name=");
1158                 putstr(tmp);
1159                 putstr("\r\n");
1160                 return 0;
1161         }
1162         /* this is for the bare filename, directories have already been mapped */
1163         if (!(pino = jffs2_1pass_list_inodes(pL, pino))) {
1164                 putstr("find_inode failed for name=");
1165                 putstr(tmp);
1166                 putstr("\r\n");
1167                 return 0;
1168         }
1169         return pino;
1170
1171 }
1172
1173 unsigned char
1174 jffs2_1pass_rescan_needed(struct part_info *part)
1175 {
1176         struct b_node *b;
1177         struct jffs2_unknown_node onode;
1178         struct jffs2_unknown_node *node;
1179         struct b_lists *pL = (struct b_lists *)part->jffs2_priv;
1180
1181         if (part->jffs2_priv == 0){
1182                 DEBUGF ("rescan: First time in use\n");
1183                 return 1;
1184         }
1185
1186         /* if we have no list, we need to rescan */
1187         if (pL->frag.listCount == 0) {
1188                 DEBUGF ("rescan: fraglist zero\n");
1189                 return 1;
1190         }
1191
1192         /* but suppose someone reflashed a partition at the same offset... */
1193         b = pL->dir.listHead;
1194         while (b) {
1195                 node = (struct jffs2_unknown_node *) get_fl_mem(b->offset,
1196                         sizeof(onode), &onode);
1197                 if (node->nodetype != JFFS2_NODETYPE_DIRENT) {
1198                         DEBUGF ("rescan: fs changed beneath me? (%lx)\n",
1199                                         (unsigned long) b->offset);
1200                         return 1;
1201                 }
1202                 b = b->next;
1203         }
1204         return 0;
1205 }
1206
1207 #ifdef CONFIG_JFFS2_SUMMARY
1208 static u32 sum_get_unaligned32(u32 *ptr)
1209 {
1210         u32 val;
1211         u8 *p = (u8 *)ptr;
1212
1213         val = *p | (*(p + 1) << 8) | (*(p + 2) << 16) | (*(p + 3) << 24);
1214
1215         return __le32_to_cpu(val);
1216 }
1217
1218 static u16 sum_get_unaligned16(u16 *ptr)
1219 {
1220         u16 val;
1221         u8 *p = (u8 *)ptr;
1222
1223         val = *p | (*(p + 1) << 8);
1224
1225         return __le16_to_cpu(val);
1226 }
1227
1228 #define dbg_summary(...) do {} while (0);
1229 /*
1230  * Process the stored summary information - helper function for
1231  * jffs2_sum_scan_sumnode()
1232  */
1233
1234 static int jffs2_sum_process_sum_data(struct part_info *part, uint32_t offset,
1235                                 struct jffs2_raw_summary *summary,
1236                                 struct b_lists *pL)
1237 {
1238         void *sp;
1239         int i, pass;
1240         void *ret;
1241
1242         for (pass = 0; pass < 2; pass++) {
1243                 sp = summary->sum;
1244
1245                 for (i = 0; i < summary->sum_num; i++) {
1246                         struct jffs2_sum_unknown_flash *spu = sp;
1247                         dbg_summary("processing summary index %d\n", i);
1248
1249                         switch (sum_get_unaligned16(&spu->nodetype)) {
1250                                 case JFFS2_NODETYPE_INODE: {
1251                                 struct jffs2_sum_inode_flash *spi;
1252                                         if (pass) {
1253                                                 spi = sp;
1254
1255                                                 ret = insert_node(&pL->frag,
1256                                                         (u32)part->offset +
1257                                                         offset +
1258                                                         sum_get_unaligned32(
1259                                                                 &spi->offset));
1260                                                 if (ret == NULL)
1261                                                         return -1;
1262                                         }
1263
1264                                         sp += JFFS2_SUMMARY_INODE_SIZE;
1265
1266                                         break;
1267                                 }
1268                                 case JFFS2_NODETYPE_DIRENT: {
1269                                         struct jffs2_sum_dirent_flash *spd;
1270                                         spd = sp;
1271                                         if (pass) {
1272                                                 ret = insert_node(&pL->dir,
1273                                                         (u32) part->offset +
1274                                                         offset +
1275                                                         sum_get_unaligned32(
1276                                                                 &spd->offset));
1277                                                 if (ret == NULL)
1278                                                         return -1;
1279                                         }
1280
1281                                         sp += JFFS2_SUMMARY_DIRENT_SIZE(
1282                                                         spd->nsize);
1283
1284                                         break;
1285                                 }
1286                                 default : {
1287                                         uint16_t nodetype = sum_get_unaligned16(
1288                                                                 &spu->nodetype);
1289                                         printf("Unsupported node type %x found"
1290                                                         " in summary!\n",
1291                                                         nodetype);
1292                                         if ((nodetype & JFFS2_COMPAT_MASK) ==
1293                                                         JFFS2_FEATURE_INCOMPAT)
1294                                                 return -EIO;
1295                                         return -EBADMSG;
1296                                 }
1297                         }
1298                 }
1299         }
1300         return 0;
1301 }
1302
1303 /* Process the summary node - called from jffs2_scan_eraseblock() */
1304 int jffs2_sum_scan_sumnode(struct part_info *part, uint32_t offset,
1305                            struct jffs2_raw_summary *summary, uint32_t sumsize,
1306                            struct b_lists *pL)
1307 {
1308         struct jffs2_unknown_node crcnode;
1309         int ret, ofs;
1310         uint32_t crc;
1311
1312         ofs = part->sector_size - sumsize;
1313
1314         dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
1315                     offset, offset + ofs, sumsize);
1316
1317         /* OK, now check for node validity and CRC */
1318         crcnode.magic = JFFS2_MAGIC_BITMASK;
1319         crcnode.nodetype = JFFS2_NODETYPE_SUMMARY;
1320         crcnode.totlen = summary->totlen;
1321         crc = crc32_no_comp(0, (uchar *)&crcnode, sizeof(crcnode)-4);
1322
1323         if (summary->hdr_crc != crc) {
1324                 dbg_summary("Summary node header is corrupt (bad CRC or "
1325                                 "no summary at all)\n");
1326                 goto crc_err;
1327         }
1328
1329         if (summary->totlen != sumsize) {
1330                 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
1331                 goto crc_err;
1332         }
1333
1334         crc = crc32_no_comp(0, (uchar *)summary,
1335                         sizeof(struct jffs2_raw_summary)-8);
1336
1337         if (summary->node_crc != crc) {
1338                 dbg_summary("Summary node is corrupt (bad CRC)\n");
1339                 goto crc_err;
1340         }
1341
1342         crc = crc32_no_comp(0, (uchar *)summary->sum,
1343                         sumsize - sizeof(struct jffs2_raw_summary));
1344
1345         if (summary->sum_crc != crc) {
1346                 dbg_summary("Summary node data is corrupt (bad CRC)\n");
1347                 goto crc_err;
1348         }
1349
1350         if (summary->cln_mkr)
1351                 dbg_summary("Summary : CLEANMARKER node \n");
1352
1353         ret = jffs2_sum_process_sum_data(part, offset, summary, pL);
1354         if (ret == -EBADMSG)
1355                 return 0;
1356         if (ret)
1357                 return ret;             /* real error */
1358
1359         return 1;
1360
1361 crc_err:
1362         putstr("Summary node crc error, skipping summary information.\n");
1363
1364         return 0;
1365 }
1366 #endif /* CONFIG_JFFS2_SUMMARY */
1367
1368 #ifdef DEBUG_FRAGMENTS
1369 static void
1370 dump_fragments(struct b_lists *pL)
1371 {
1372         struct b_node *b;
1373         struct jffs2_raw_inode ojNode;
1374         struct jffs2_raw_inode *jNode;
1375
1376         putstr("\r\n\r\n******The fragment Entries******\r\n");
1377         b = pL->frag.listHead;
1378         while (b) {
1379                 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
1380                         sizeof(ojNode), &ojNode);
1381                 putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset);
1382                 putLabeledWord("\tbuild_list: totlen = ", jNode->totlen);
1383                 putLabeledWord("\tbuild_list: inode = ", jNode->ino);
1384                 putLabeledWord("\tbuild_list: version = ", jNode->version);
1385                 putLabeledWord("\tbuild_list: isize = ", jNode->isize);
1386                 putLabeledWord("\tbuild_list: atime = ", jNode->atime);
1387                 putLabeledWord("\tbuild_list: offset = ", jNode->offset);
1388                 putLabeledWord("\tbuild_list: csize = ", jNode->csize);
1389                 putLabeledWord("\tbuild_list: dsize = ", jNode->dsize);
1390                 putLabeledWord("\tbuild_list: compr = ", jNode->compr);
1391                 putLabeledWord("\tbuild_list: usercompr = ", jNode->usercompr);
1392                 putLabeledWord("\tbuild_list: flags = ", jNode->flags);
1393                 putLabeledWord("\tbuild_list: offset = ", b->offset);   /* FIXME: ? [RS] */
1394                 b = b->next;
1395         }
1396 }
1397 #endif
1398
1399 #ifdef DEBUG_DIRENTS
1400 static void
1401 dump_dirents(struct b_lists *pL)
1402 {
1403         struct b_node *b;
1404         struct jffs2_raw_dirent *jDir;
1405
1406         putstr("\r\n\r\n******The directory Entries******\r\n");
1407         b = pL->dir.listHead;
1408         while (b) {
1409                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
1410                                                                 pL->readbuf);
1411                 putstr("\r\n");
1412                 putnstr(jDir->name, jDir->nsize);
1413                 putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
1414                 putLabeledWord("\tbuild_list: nodetype = ", jDir->nodetype);
1415                 putLabeledWord("\tbuild_list: hdr_crc = ", jDir->hdr_crc);
1416                 putLabeledWord("\tbuild_list: pino = ", jDir->pino);
1417                 putLabeledWord("\tbuild_list: version = ", jDir->version);
1418                 putLabeledWord("\tbuild_list: ino = ", jDir->ino);
1419                 putLabeledWord("\tbuild_list: mctime = ", jDir->mctime);
1420                 putLabeledWord("\tbuild_list: nsize = ", jDir->nsize);
1421                 putLabeledWord("\tbuild_list: type = ", jDir->type);
1422                 putLabeledWord("\tbuild_list: node_crc = ", jDir->node_crc);
1423                 putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc);
1424                 putLabeledWord("\tbuild_list: offset = ", b->offset);   /* FIXME: ? [RS] */
1425                 b = b->next;
1426                 put_fl_mem(jDir, pL->readbuf);
1427         }
1428 }
1429 #endif
1430
1431 #define DEFAULT_EMPTY_SCAN_SIZE 4096
1432
1433 static inline uint32_t EMPTY_SCAN_SIZE(uint32_t sector_size)
1434 {
1435         if (sector_size < DEFAULT_EMPTY_SCAN_SIZE)
1436                 return sector_size;
1437         else
1438                 return DEFAULT_EMPTY_SCAN_SIZE;
1439 }
1440
1441 static u32
1442 jffs2_1pass_build_lists(struct part_info * part)
1443 {
1444         struct b_lists *pL;
1445         struct jffs2_unknown_node *node;
1446         u32 nr_sectors = part->size/part->sector_size;
1447         u32 i;
1448         u32 counter4 = 0;
1449         u32 counterF = 0;
1450         u32 counterN = 0;
1451         u32 max_totlen = 0;
1452         u32 buf_size = DEFAULT_EMPTY_SCAN_SIZE;
1453         char *buf;
1454
1455         /* turn off the lcd.  Refreshing the lcd adds 50% overhead to the */
1456         /* jffs2 list building enterprise nope.  in newer versions the overhead is */
1457         /* only about 5 %.  not enough to inconvenience people for. */
1458         /* lcd_off(); */
1459
1460         /* if we are building a list we need to refresh the cache. */
1461         jffs_init_1pass_list(part);
1462         pL = (struct b_lists *)part->jffs2_priv;
1463         buf = malloc(buf_size);
1464         puts ("Scanning JFFS2 FS:   ");
1465
1466         /* start at the beginning of the partition */
1467         for (i = 0; i < nr_sectors; i++) {
1468                 uint32_t sector_ofs = i * part->sector_size;
1469                 uint32_t buf_ofs = sector_ofs;
1470                 uint32_t buf_len;
1471                 uint32_t ofs, prevofs;
1472 #ifdef CONFIG_JFFS2_SUMMARY
1473                 struct jffs2_sum_marker *sm;
1474                 void *sumptr = NULL;
1475                 uint32_t sumlen;
1476                 int ret;
1477 #endif
1478
1479                 WATCHDOG_RESET();
1480
1481 #ifdef CONFIG_JFFS2_SUMMARY
1482                 buf_len = sizeof(*sm);
1483
1484                 /* Read as much as we want into the _end_ of the preallocated
1485                  * buffer
1486                  */
1487                 get_fl_mem(part->offset + sector_ofs + part->sector_size -
1488                                 buf_len, buf_len, buf + buf_size - buf_len);
1489
1490                 sm = (void *)buf + buf_size - sizeof(*sm);
1491                 if (sm->magic == JFFS2_SUM_MAGIC) {
1492                         sumlen = part->sector_size - sm->offset;
1493                         sumptr = buf + buf_size - sumlen;
1494
1495                         /* Now, make sure the summary itself is available */
1496                         if (sumlen > buf_size) {
1497                                 /* Need to kmalloc for this. */
1498                                 sumptr = malloc(sumlen);
1499                                 if (!sumptr) {
1500                                         putstr("Can't get memory for summary "
1501                                                         "node!\n");
1502                                         free(buf);
1503                                         jffs2_free_cache(part);
1504                                         return 0;
1505                                 }
1506                                 memcpy(sumptr + sumlen - buf_len, buf +
1507                                                 buf_size - buf_len, buf_len);
1508                         }
1509                         if (buf_len < sumlen) {
1510                                 /* Need to read more so that the entire summary
1511                                  * node is present
1512                                  */
1513                                 get_fl_mem(part->offset + sector_ofs +
1514                                                 part->sector_size - sumlen,
1515                                                 sumlen - buf_len, sumptr);
1516                         }
1517                 }
1518
1519                 if (sumptr) {
1520                         ret = jffs2_sum_scan_sumnode(part, sector_ofs, sumptr,
1521                                         sumlen, pL);
1522
1523                         if (buf_size && sumlen > buf_size)
1524                                 free(sumptr);
1525                         if (ret < 0) {
1526                                 free(buf);
1527                                 jffs2_free_cache(part);
1528                                 return 0;
1529                         }
1530                         if (ret)
1531                                 continue;
1532
1533                 }
1534 #endif /* CONFIG_JFFS2_SUMMARY */
1535
1536                 buf_len = EMPTY_SCAN_SIZE(part->sector_size);
1537
1538                 get_fl_mem((u32)part->offset + buf_ofs, buf_len, buf);
1539
1540                 /* We temporarily use 'ofs' as a pointer into the buffer/jeb */
1541                 ofs = 0;
1542
1543                 /* Scan only 4KiB of 0xFF before declaring it's empty */
1544                 while (ofs < EMPTY_SCAN_SIZE(part->sector_size) &&
1545                                 *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
1546                         ofs += 4;
1547
1548                 if (ofs == EMPTY_SCAN_SIZE(part->sector_size))
1549                         continue;
1550
1551                 ofs += sector_ofs;
1552                 prevofs = ofs - 1;
1553
1554         scan_more:
1555                 while (ofs < sector_ofs + part->sector_size) {
1556                         if (ofs == prevofs) {
1557                                 printf("offset %08x already seen, skip\n", ofs);
1558                                 ofs += 4;
1559                                 counter4++;
1560                                 continue;
1561                         }
1562                         prevofs = ofs;
1563                         if (sector_ofs + part->sector_size <
1564                                         ofs + sizeof(*node))
1565                                 break;
1566                         if (buf_ofs + buf_len < ofs + sizeof(*node)) {
1567                                 buf_len = min_t(uint32_t, buf_size, sector_ofs
1568                                                 + part->sector_size - ofs);
1569                                 get_fl_mem((u32)part->offset + ofs, buf_len,
1570                                            buf);
1571                                 buf_ofs = ofs;
1572                         }
1573
1574                         node = (struct jffs2_unknown_node *)&buf[ofs-buf_ofs];
1575
1576                         if (*(uint32_t *)(&buf[ofs-buf_ofs]) == 0xffffffff) {
1577                                 uint32_t inbuf_ofs;
1578                                 uint32_t empty_start, scan_end;
1579
1580                                 empty_start = ofs;
1581                                 ofs += 4;
1582                                 scan_end = min_t(uint32_t, EMPTY_SCAN_SIZE(
1583                                                         part->sector_size)/8,
1584                                                         buf_len);
1585                         more_empty:
1586                                 inbuf_ofs = ofs - buf_ofs;
1587                                 while (inbuf_ofs < scan_end) {
1588                                         if (*(uint32_t *)(&buf[inbuf_ofs]) !=
1589                                                         0xffffffff)
1590                                                 goto scan_more;
1591
1592                                         inbuf_ofs += 4;
1593                                         ofs += 4;
1594                                 }
1595                                 /* Ran off end. */
1596
1597                                 /* See how much more there is to read in this
1598                                  * eraseblock...
1599                                  */
1600                                 buf_len = min_t(uint32_t, buf_size,
1601                                                 sector_ofs +
1602                                                 part->sector_size - ofs);
1603                                 if (!buf_len) {
1604                                         /* No more to read. Break out of main
1605                                          * loop without marking this range of
1606                                          * empty space as dirty (because it's
1607                                          * not)
1608                                          */
1609                                         break;
1610                                 }
1611                                 scan_end = buf_len;
1612                                 get_fl_mem((u32)part->offset + ofs, buf_len,
1613                                            buf);
1614                                 buf_ofs = ofs;
1615                                 goto more_empty;
1616                         }
1617                         if (node->magic != JFFS2_MAGIC_BITMASK ||
1618                                         !hdr_crc(node)) {
1619                                 ofs += 4;
1620                                 counter4++;
1621                                 continue;
1622                         }
1623                         if (ofs + node->totlen >
1624                                         sector_ofs + part->sector_size) {
1625                                 ofs += 4;
1626                                 counter4++;
1627                                 continue;
1628                         }
1629                         /* if its a fragment add it */
1630                         switch (node->nodetype) {
1631                         case JFFS2_NODETYPE_INODE:
1632                                 if (buf_ofs + buf_len < ofs + sizeof(struct
1633                                                         jffs2_raw_inode)) {
1634                                         get_fl_mem((u32)part->offset + ofs,
1635                                                    buf_len, buf);
1636                                         buf_ofs = ofs;
1637                                         node = (void *)buf;
1638                                 }
1639                                 if (!inode_crc((struct jffs2_raw_inode *) node))
1640                                        break;
1641
1642                                 if (insert_node(&pL->frag, (u32) part->offset +
1643                                                 ofs) == NULL) {
1644                                         free(buf);
1645                                         jffs2_free_cache(part);
1646                                         return 0;
1647                                 }
1648                                 if (max_totlen < node->totlen)
1649                                         max_totlen = node->totlen;
1650                                 break;
1651                         case JFFS2_NODETYPE_DIRENT:
1652                                 if (buf_ofs + buf_len < ofs + sizeof(struct
1653                                                         jffs2_raw_dirent) +
1654                                                         ((struct
1655                                                          jffs2_raw_dirent *)
1656                                                         node)->nsize) {
1657                                         get_fl_mem((u32)part->offset + ofs,
1658                                                    buf_len, buf);
1659                                         buf_ofs = ofs;
1660                                         node = (void *)buf;
1661                                 }
1662
1663                                 if (!dirent_crc((struct jffs2_raw_dirent *)
1664                                                         node) ||
1665                                                 !dirent_name_crc(
1666                                                         (struct
1667                                                          jffs2_raw_dirent *)
1668                                                         node))
1669                                         break;
1670                                 if (! (counterN%100))
1671                                         puts ("\b\b.  ");
1672                                 if (insert_node(&pL->dir, (u32) part->offset +
1673                                                 ofs) == NULL) {
1674                                         free(buf);
1675                                         jffs2_free_cache(part);
1676                                         return 0;
1677                                 }
1678                                 if (max_totlen < node->totlen)
1679                                         max_totlen = node->totlen;
1680                                 counterN++;
1681                                 break;
1682                         case JFFS2_NODETYPE_CLEANMARKER:
1683                                 if (node->totlen != sizeof(struct jffs2_unknown_node))
1684                                         printf("OOPS Cleanmarker has bad size "
1685                                                 "%d != %zu\n",
1686                                                 node->totlen,
1687                                                 sizeof(struct jffs2_unknown_node));
1688                                 break;
1689                         case JFFS2_NODETYPE_PADDING:
1690                                 if (node->totlen < sizeof(struct jffs2_unknown_node))
1691                                         printf("OOPS Padding has bad size "
1692                                                 "%d < %zu\n",
1693                                                 node->totlen,
1694                                                 sizeof(struct jffs2_unknown_node));
1695                                 break;
1696                         case JFFS2_NODETYPE_SUMMARY:
1697                                 break;
1698                         default:
1699                                 printf("Unknown node type: %x len %d offset 0x%x\n",
1700                                         node->nodetype,
1701                                         node->totlen, ofs);
1702                         }
1703                         ofs += ((node->totlen + 3) & ~3);
1704                         counterF++;
1705                 }
1706         }
1707
1708         free(buf);
1709         putstr("\b\b done.\r\n");               /* close off the dots */
1710
1711         /* We don't care if malloc failed - then each read operation will
1712          * allocate its own buffer as necessary (NAND) or will read directly
1713          * from flash (NOR).
1714          */
1715         pL->readbuf = malloc(max_totlen);
1716
1717         /* turn the lcd back on. */
1718         /* splash(); */
1719
1720 #if 0
1721         putLabeledWord("dir entries = ", pL->dir.listCount);
1722         putLabeledWord("frag entries = ", pL->frag.listCount);
1723         putLabeledWord("+4 increments = ", counter4);
1724         putLabeledWord("+file_offset increments = ", counterF);
1725
1726 #endif
1727
1728 #ifdef DEBUG_DIRENTS
1729         dump_dirents(pL);
1730 #endif
1731
1732 #ifdef DEBUG_FRAGMENTS
1733         dump_fragments(pL);
1734 #endif
1735
1736         /* give visual feedback that we are done scanning the flash */
1737         led_blink(0x0, 0x0, 0x1, 0x1);  /* off, forever, on 100ms, off 100ms */
1738         return 1;
1739 }
1740
1741
1742 static u32
1743 jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL)
1744 {
1745         struct b_node *b;
1746         struct jffs2_raw_inode ojNode;
1747         struct jffs2_raw_inode *jNode;
1748         int i;
1749
1750         for (i = 0; i < JFFS2_NUM_COMPR; i++) {
1751                 piL->compr_info[i].num_frags = 0;
1752                 piL->compr_info[i].compr_sum = 0;
1753                 piL->compr_info[i].decompr_sum = 0;
1754         }
1755
1756         b = pL->frag.listHead;
1757         while (b) {
1758                 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
1759                         sizeof(ojNode), &ojNode);
1760                 if (jNode->compr < JFFS2_NUM_COMPR) {
1761                         piL->compr_info[jNode->compr].num_frags++;
1762                         piL->compr_info[jNode->compr].compr_sum += jNode->csize;
1763                         piL->compr_info[jNode->compr].decompr_sum += jNode->dsize;
1764                 }
1765                 b = b->next;
1766         }
1767         return 0;
1768 }
1769
1770
1771 static struct b_lists *
1772 jffs2_get_list(struct part_info * part, const char *who)
1773 {
1774         /* copy requested part_info struct pointer to global location */
1775         current_part = part;
1776
1777         if (jffs2_1pass_rescan_needed(part)) {
1778                 if (!jffs2_1pass_build_lists(part)) {
1779                         printf("%s: Failed to scan JFFSv2 file structure\n", who);
1780                         return NULL;
1781                 }
1782         }
1783         return (struct b_lists *)part->jffs2_priv;
1784 }
1785
1786
1787 /* Print directory / file contents */
1788 u32
1789 jffs2_1pass_ls(struct part_info * part, const char *fname)
1790 {
1791         struct b_lists *pl;
1792         long ret = 1;
1793         u32 inode;
1794
1795         if (! (pl = jffs2_get_list(part, "ls")))
1796                 return 0;
1797
1798         if (! (inode = jffs2_1pass_search_list_inodes(pl, fname, 1))) {
1799                 putstr("ls: Failed to scan jffs2 file structure\r\n");
1800                 return 0;
1801         }
1802
1803
1804 #if 0
1805         putLabeledWord("found file at inode = ", inode);
1806         putLabeledWord("read_inode returns = ", ret);
1807 #endif
1808
1809         return ret;
1810 }
1811
1812
1813 /* Load a file from flash into memory. fname can be a full path */
1814 u32
1815 jffs2_1pass_load(char *dest, struct part_info * part, const char *fname)
1816 {
1817
1818         struct b_lists *pl;
1819         long ret = 1;
1820         u32 inode;
1821
1822         if (! (pl  = jffs2_get_list(part, "load")))
1823                 return 0;
1824
1825         if (! (inode = jffs2_1pass_search_inode(pl, fname, 1))) {
1826                 putstr("load: Failed to find inode\r\n");
1827                 return 0;
1828         }
1829
1830         /* Resolve symlinks */
1831         if (! (inode = jffs2_1pass_resolve_inode(pl, inode))) {
1832                 putstr("load: Failed to resolve inode structure\r\n");
1833                 return 0;
1834         }
1835
1836         if ((ret = jffs2_1pass_read_inode(pl, inode, dest)) < 0) {
1837                 putstr("load: Failed to read inode\r\n");
1838                 return 0;
1839         }
1840
1841         DEBUGF ("load: loaded '%s' to 0x%lx (%ld bytes)\n", fname,
1842                                 (unsigned long) dest, ret);
1843         return ret;
1844 }
1845
1846 /* Return information about the fs on this partition */
1847 u32
1848 jffs2_1pass_info(struct part_info * part)
1849 {
1850         struct b_jffs2_info info;
1851         struct b_lists *pl;
1852         int i;
1853
1854         if (! (pl  = jffs2_get_list(part, "info")))
1855                 return 0;
1856
1857         jffs2_1pass_fill_info(pl, &info);
1858         for (i = 0; i < JFFS2_NUM_COMPR; i++) {
1859                 printf ("Compression: %s\n"
1860                         "\tfrag count: %d\n"
1861                         "\tcompressed sum: %d\n"
1862                         "\tuncompressed sum: %d\n",
1863                         compr_names[i],
1864                         info.compr_info[i].num_frags,
1865                         info.compr_info[i].compr_sum,
1866                         info.compr_info[i].decompr_sum);
1867         }
1868         return 1;
1869 }