git.sur5r.net Git - u-boot/blob - 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 <div64.h>
 118 #include <linux/compiler.h>
 119 #include <linux/stat.h>
 120 #include <linux/time.h>
 121 #include <watchdog.h>
 122 #include <jffs2/jffs2.h>
 123 #include <jffs2/jffs2_1pass.h>
 124 #include <linux/compat.h>
 125 #include <linux/errno.h>
 126
 127 #include "jffs2_private.h"
 128
 129
 130 #define NODE_CHUNK      1024    /* size of memory allocation chunk in b_nodes */
 131 #define SPIN_BLKSIZE    18      /* spin after having scanned 1<<BLKSIZE bytes */
 132
 133 /* Debugging switches */
 134 #undef  DEBUG_DIRENTS           /* print directory entry list after scan */
 135 #undef  DEBUG_FRAGMENTS         /* print fragment list after scan */
 136 #undef  DEBUG                   /* enable debugging messages */
 137
 138
 139 #ifdef  DEBUG
 140 # define DEBUGF(fmt,args...)    printf(fmt ,##args)
 141 #else
 142 # define DEBUGF(fmt,args...)
 143 #endif
 144
 145 #include "summary.h"
 146
 147 /* keeps pointer to currentlu processed partition */
 148 static struct part_info *current_part;
 149
 150 #if (defined(CONFIG_JFFS2_NAND) && \
 151      defined(CONFIG_CMD_NAND) )
 152 #include <nand.h>
 153 /*
 154  * Support for jffs2 on top of NAND-flash
 155  *
 156  * NAND memory isn't mapped in processor's address space,
 157  * so data should be fetched from flash before
 158  * being processed. This is exactly what functions declared
 159  * here do.
 160  *
 161  */
 162
 163 #define NAND_PAGE_SIZE 512
 164 #define NAND_PAGE_SHIFT 9
 165 #define NAND_PAGE_MASK (~(NAND_PAGE_SIZE-1))
 166
 167 #ifndef NAND_CACHE_PAGES
 168 #define NAND_CACHE_PAGES 16
 169 #endif
 170 #define NAND_CACHE_SIZE (NAND_CACHE_PAGES*NAND_PAGE_SIZE)
 171
 172 static u8* nand_cache = NULL;
 173 static u32 nand_cache_off = (u32)-1;
 174
 175 static int read_nand_cached(u32 off, u32 size, u_char *buf)
 176 {
 177         struct mtdids *id = current_part->dev->id;
 178         struct mtd_info *mtd;
 179         u32 bytes_read = 0;
 180         size_t retlen;
 181         int cpy_bytes;
 182
 183         mtd = get_nand_dev_by_index(id->num);
 184         if (!mtd)
 185                 return -1;
 186
 187         while (bytes_read < size) {
 188                 if ((off + bytes_read < nand_cache_off) ||
 189                     (off + bytes_read >= nand_cache_off+NAND_CACHE_SIZE)) {
 190                         nand_cache_off = (off + bytes_read) & NAND_PAGE_MASK;
 191                         if (!nand_cache) {
 192                                 /* This memory never gets freed but 'cause
 193                                    it's a bootloader, nobody cares */
 194                                 nand_cache = malloc(NAND_CACHE_SIZE);
 195                                 if (!nand_cache) {
 196                                         printf("read_nand_cached: can't alloc cache size %d bytes\n",
 197                                                NAND_CACHE_SIZE);
 198                                         return -1;
 199                                 }
 200                         }
 201
 202                         retlen = NAND_CACHE_SIZE;
 203                         if (nand_read(mtd, nand_cache_off,
 204                                       &retlen, nand_cache) < 0 ||
 205                                         retlen != NAND_CACHE_SIZE) {
 206                                 printf("read_nand_cached: error reading nand off %#x size %d bytes\n",
 207                                                 nand_cache_off, NAND_CACHE_SIZE);
 208                                 return -1;
 209                         }
 210                 }
 211                 cpy_bytes = nand_cache_off + NAND_CACHE_SIZE - (off + bytes_read);
 212                 if (cpy_bytes > size - bytes_read)
 213                         cpy_bytes = size - bytes_read;
 214                 memcpy(buf + bytes_read,
 215                        nand_cache + off + bytes_read - nand_cache_off,
 216                        cpy_bytes);
 217                 bytes_read += cpy_bytes;
 218         }
 219         return bytes_read;
 220 }
 221
 222 static void *get_fl_mem_nand(u32 off, u32 size, void *ext_buf)
 223 {
 224         u_char *buf = ext_buf ? (u_char*)ext_buf : (u_char*)malloc(size);
 225
 226         if (NULL == buf) {
 227                 printf("get_fl_mem_nand: can't alloc %d bytes\n", size);
 228                 return NULL;
 229         }
 230         if (read_nand_cached(off, size, buf) < 0) {
 231                 if (!ext_buf)
 232                         free(buf);
 233                 return NULL;
 234         }
 235
 236         return buf;
 237 }
 238
 239 static void *get_node_mem_nand(u32 off, void *ext_buf)
 240 {
 241         struct jffs2_unknown_node node;
 242         void *ret = NULL;
 243
 244         if (NULL == get_fl_mem_nand(off, sizeof(node), &node))
 245                 return NULL;
 246
 247         if (!(ret = get_fl_mem_nand(off, node.magic ==
 248                                JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
 249                                ext_buf))) {
 250                 printf("off = %#x magic %#x type %#x node.totlen = %d\n",
 251                        off, node.magic, node.nodetype, node.totlen);
 252         }
 253         return ret;
 254 }
 255
 256 static void put_fl_mem_nand(void *buf)
 257 {
 258         free(buf);
 259 }
 260 #endif
 261
 262 #if defined(CONFIG_CMD_ONENAND)
 263
 264 #include <linux/mtd/mtd.h>
 265 #include <linux/mtd/onenand.h>
 266 #include <onenand_uboot.h>
 267
 268 #define ONENAND_PAGE_SIZE 2048
 269 #define ONENAND_PAGE_SHIFT 11
 270 #define ONENAND_PAGE_MASK (~(ONENAND_PAGE_SIZE-1))
 271
 272 #ifndef ONENAND_CACHE_PAGES
 273 #define ONENAND_CACHE_PAGES 4
 274 #endif
 275 #define ONENAND_CACHE_SIZE (ONENAND_CACHE_PAGES*ONENAND_PAGE_SIZE)
 276
 277 static u8* onenand_cache;
 278 static u32 onenand_cache_off = (u32)-1;
 279
 280 static int read_onenand_cached(u32 off, u32 size, u_char *buf)
 281 {
 282         u32 bytes_read = 0;
 283         size_t retlen;
 284         int cpy_bytes;
 285
 286         while (bytes_read < size) {
 287                 if ((off + bytes_read < onenand_cache_off) ||
 288                     (off + bytes_read >= onenand_cache_off + ONENAND_CACHE_SIZE)) {
 289                         onenand_cache_off = (off + bytes_read) & ONENAND_PAGE_MASK;
 290                         if (!onenand_cache) {
 291                                 /* This memory never gets freed but 'cause
 292                                    it's a bootloader, nobody cares */
 293                                 onenand_cache = malloc(ONENAND_CACHE_SIZE);
 294                                 if (!onenand_cache) {
 295                                         printf("read_onenand_cached: can't alloc cache size %d bytes\n",
 296                                                ONENAND_CACHE_SIZE);
 297                                         return -1;
 298                                 }
 299                         }
 300
 301                         retlen = ONENAND_CACHE_SIZE;
 302                         if (onenand_read(&onenand_mtd, onenand_cache_off, retlen,
 303                                                 &retlen, onenand_cache) < 0 ||
 304                                         retlen != ONENAND_CACHE_SIZE) {
 305                                 printf("read_onenand_cached: error reading nand off %#x size %d bytes\n",
 306                                         onenand_cache_off, ONENAND_CACHE_SIZE);
 307                                 return -1;
 308                         }
 309                 }
 310                 cpy_bytes = onenand_cache_off + ONENAND_CACHE_SIZE - (off + bytes_read);
 311                 if (cpy_bytes > size - bytes_read)
 312                         cpy_bytes = size - bytes_read;
 313                 memcpy(buf + bytes_read,
 314                        onenand_cache + off + bytes_read - onenand_cache_off,
 315                        cpy_bytes);
 316                 bytes_read += cpy_bytes;
 317         }
 318         return bytes_read;
 319 }
 320
 321 static void *get_fl_mem_onenand(u32 off, u32 size, void *ext_buf)
 322 {
 323         u_char *buf = ext_buf ? (u_char *)ext_buf : (u_char *)malloc(size);
 324
 325         if (NULL == buf) {
 326                 printf("get_fl_mem_onenand: can't alloc %d bytes\n", size);
 327                 return NULL;
 328         }
 329         if (read_onenand_cached(off, size, buf) < 0) {
 330                 if (!ext_buf)
 331                         free(buf);
 332                 return NULL;
 333         }
 334
 335         return buf;
 336 }
 337
 338 static void *get_node_mem_onenand(u32 off, void *ext_buf)
 339 {
 340         struct jffs2_unknown_node node;
 341         void *ret = NULL;
 342
 343         if (NULL == get_fl_mem_onenand(off, sizeof(node), &node))
 344                 return NULL;
 345
 346         ret = get_fl_mem_onenand(off, node.magic ==
 347                         JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
 348                         ext_buf);
 349         if (!ret) {
 350                 printf("off = %#x magic %#x type %#x node.totlen = %d\n",
 351                        off, node.magic, node.nodetype, node.totlen);
 352         }
 353         return ret;
 354 }
 355
 356
 357 static void put_fl_mem_onenand(void *buf)
 358 {
 359         free(buf);
 360 }
 361 #endif
 362
 363
 364 #if defined(CONFIG_CMD_FLASH)
 365 /*
 366  * Support for jffs2 on top of NOR-flash
 367  *
 368  * NOR flash memory is mapped in processor's address space,
 369  * just return address.
 370  */
 371 static inline void *get_fl_mem_nor(u32 off, u32 size, void *ext_buf)
 372 {
 373         u32 addr = off;
 374         struct mtdids *id = current_part->dev->id;
 375
 376         extern flash_info_t flash_info[];
 377         flash_info_t *flash = &flash_info[id->num];
 378
 379         addr += flash->start[0];
 380         if (ext_buf) {
 381                 memcpy(ext_buf, (void *)addr, size);
 382                 return ext_buf;
 383         }
 384         return (void*)addr;
 385 }
 386
 387 static inline void *get_node_mem_nor(u32 off, void *ext_buf)
 388 {
 389         struct jffs2_unknown_node *pNode;
 390
 391         /* pNode will point directly to flash - don't provide external buffer
 392            and don't care about size */
 393         pNode = get_fl_mem_nor(off, 0, NULL);
 394         return (void *)get_fl_mem_nor(off, pNode->magic == JFFS2_MAGIC_BITMASK ?
 395                         pNode->totlen : sizeof(*pNode), ext_buf);
 396 }
 397 #endif
 398
 399
 400 /*
 401  * Generic jffs2 raw memory and node read routines.
 402  *
 403  */
 404 static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf)
 405 {
 406         struct mtdids *id = current_part->dev->id;
 407
 408         switch(id->type) {
 409 #if defined(CONFIG_CMD_FLASH)
 410         case MTD_DEV_TYPE_NOR:
 411                 return get_fl_mem_nor(off, size, ext_buf);
 412                 break;
 413 #endif
 414 #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
 415         case MTD_DEV_TYPE_NAND:
 416                 return get_fl_mem_nand(off, size, ext_buf);
 417                 break;
 418 #endif
 419 #if defined(CONFIG_CMD_ONENAND)
 420         case MTD_DEV_TYPE_ONENAND:
 421                 return get_fl_mem_onenand(off, size, ext_buf);
 422                 break;
 423 #endif
 424         default:
 425                 printf("get_fl_mem: unknown device type, " \
 426                         "using raw offset!\n");
 427         }
 428         return (void*)off;
 429 }
 430
 431 static inline void *get_node_mem(u32 off, void *ext_buf)
 432 {
 433         struct mtdids *id = current_part->dev->id;
 434
 435         switch(id->type) {
 436 #if defined(CONFIG_CMD_FLASH)
 437         case MTD_DEV_TYPE_NOR:
 438                 return get_node_mem_nor(off, ext_buf);
 439                 break;
 440 #endif
 441 #if defined(CONFIG_JFFS2_NAND) && \
 442     defined(CONFIG_CMD_NAND)
 443         case MTD_DEV_TYPE_NAND:
 444                 return get_node_mem_nand(off, ext_buf);
 445                 break;
 446 #endif
 447 #if defined(CONFIG_CMD_ONENAND)
 448         case MTD_DEV_TYPE_ONENAND:
 449                 return get_node_mem_onenand(off, ext_buf);
 450                 break;
 451 #endif
 452         default:
 453                 printf("get_fl_mem: unknown device type, " \
 454                         "using raw offset!\n");
 455         }
 456         return (void*)off;
 457 }
 458
 459 static inline void put_fl_mem(void *buf, void *ext_buf)
 460 {
 461         struct mtdids *id = current_part->dev->id;
 462
 463         /* If buf is the same as ext_buf, it was provided by the caller -
 464            we shouldn't free it then. */
 465         if (buf == ext_buf)
 466                 return;
 467         switch (id->type) {
 468 #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
 469         case MTD_DEV_TYPE_NAND:
 470                 return put_fl_mem_nand(buf);
 471 #endif
 472 #if defined(CONFIG_CMD_ONENAND)
 473         case MTD_DEV_TYPE_ONENAND:
 474                 return put_fl_mem_onenand(buf);
 475 #endif
 476         }
 477 }
 478
 479 /* Compression names */
 480 static char *compr_names[] = {
 481         "NONE",
 482         "ZERO",
 483         "RTIME",
 484         "RUBINMIPS",
 485         "COPY",
 486         "DYNRUBIN",
 487         "ZLIB",
 488 #if defined(CONFIG_JFFS2_LZO)
 489         "LZO",
 490 #endif
 491 };
 492
 493 /* Memory management */
 494 struct mem_block {
 495         u32     index;
 496         struct mem_block *next;
 497         struct b_node nodes[NODE_CHUNK];
 498 };
 499
 500
 501 static void
 502 free_nodes(struct b_list *list)
 503 {
 504         while (list->listMemBase != NULL) {
 505                 struct mem_block *next = list->listMemBase->next;
 506                 free( list->listMemBase );
 507                 list->listMemBase = next;
 508         }
 509 }
 510
 511 static struct b_node *
 512 add_node(struct b_list *list)
 513 {
 514         u32 index = 0;
 515         struct mem_block *memBase;
 516         struct b_node *b;
 517
 518         memBase = list->listMemBase;
 519         if (memBase != NULL)
 520                 index = memBase->index;
 521 #if 0
 522         putLabeledWord("add_node: index = ", index);
 523         putLabeledWord("add_node: memBase = ", list->listMemBase);
 524 #endif
 525
 526         if (memBase == NULL || index >= NODE_CHUNK) {
 527                 /* we need more space before we continue */
 528                 memBase = mmalloc(sizeof(struct mem_block));
 529                 if (memBase == NULL) {
 530                         putstr("add_node: malloc failed\n");
 531                         return NULL;
 532                 }
 533                 memBase->next = list->listMemBase;
 534                 index = 0;
 535 #if 0
 536                 putLabeledWord("add_node: alloced a new membase at ", *memBase);
 537 #endif
 538
 539         }
 540         /* now we have room to add it. */
 541         b = &memBase->nodes[index];
 542         index ++;
 543
 544         memBase->index = index;
 545         list->listMemBase = memBase;
 546         list->listCount++;
 547         return b;
 548 }
 549
 550 static struct b_node *
 551 insert_node(struct b_list *list, u32 offset)
 552 {
 553         struct b_node *new;
 554
 555         if (!(new = add_node(list))) {
 556                 putstr("add_node failed!\r\n");
 557                 return NULL;
 558         }
 559         new->offset = offset;
 560         new->next = NULL;
 561
 562         if (list->listTail != NULL)
 563                 list->listTail->next = new;
 564         else
 565                 list->listHead = new;
 566         list->listTail = new;
 567
 568         return new;
 569 }
 570
 571 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 572 /* Sort data entries with the latest version last, so that if there
 573  * is overlapping data the latest version will be used.
 574  */
 575 static int compare_inodes(struct b_node *new, struct b_node *old)
 576 {
 577         /*
 578          * Only read in the version info from flash, not the entire inode.
 579          * This can make a big difference to speed if flash is slow.
 580          */
 581         u32 new_version;
 582         u32 old_version;
 583         get_fl_mem(new->offset + offsetof(struct jffs2_raw_inode, version),
 584                    sizeof(new_version), &new_version);
 585         get_fl_mem(old->offset + offsetof(struct jffs2_raw_inode, version),
 586                    sizeof(old_version), &old_version);
 587
 588         return new_version > old_version;
 589 }
 590
 591 /* Sort directory entries so all entries in the same directory
 592  * with the same name are grouped together, with the latest version
 593  * last. This makes it easy to eliminate all but the latest version
 594  * by marking the previous version dead by setting the inode to 0.
 595  */
 596 static int compare_dirents(struct b_node *new, struct b_node *old)
 597 {
 598         /*
 599          * Using NULL as the buffer for NOR flash prevents the entire node
 600          * being read. This makes most comparisons much quicker as only one
 601          * or two entries from the node will be used most of the time.
 602          */
 603         struct jffs2_raw_dirent *jNew = get_node_mem(new->offset, NULL);
 604         struct jffs2_raw_dirent *jOld = get_node_mem(old->offset, NULL);
 605         int cmp;
 606         int ret;
 607
 608         if (jNew->pino != jOld->pino) {
 609                 /* ascending sort by pino */
 610                 ret = jNew->pino > jOld->pino;
 611         } else if (jNew->nsize != jOld->nsize) {
 612                 /*
 613                  * pino is the same, so use ascending sort by nsize,
 614                  * so we don't do strncmp unless we really must.
 615                  */
 616                 ret = jNew->nsize > jOld->nsize;
 617         } else {
 618                 /*
 619                  * length is also the same, so use ascending sort by name
 620                  */
 621                 cmp = strncmp((char *)jNew->name, (char *)jOld->name,
 622                         jNew->nsize);
 623                 if (cmp != 0) {
 624                         ret = cmp > 0;
 625                 } else {
 626                         /*
 627                          * we have duplicate names in this directory,
 628                          * so use ascending sort by version
 629                          */
 630                         ret = jNew->version > jOld->version;
 631                 }
 632         }
 633         put_fl_mem(jNew, NULL);
 634         put_fl_mem(jOld, NULL);
 635
 636         return ret;
 637 }
 638 #endif
 639
 640 void
 641 jffs2_free_cache(struct part_info *part)
 642 {
 643         struct b_lists *pL;
 644
 645         if (part->jffs2_priv != NULL) {
 646                 pL = (struct b_lists *)part->jffs2_priv;
 647                 free_nodes(&pL->frag);
 648                 free_nodes(&pL->dir);
 649                 free(pL->readbuf);
 650                 free(pL);
 651         }
 652 }
 653
 654 static u32
 655 jffs_init_1pass_list(struct part_info *part)
 656 {
 657         struct b_lists *pL;
 658
 659         jffs2_free_cache(part);
 660
 661         if (NULL != (part->jffs2_priv = malloc(sizeof(struct b_lists)))) {
 662                 pL = (struct b_lists *)part->jffs2_priv;
 663
 664                 memset(pL, 0, sizeof(*pL));
 665 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 666                 pL->dir.listCompare = compare_dirents;
 667                 pL->frag.listCompare = compare_inodes;
 668 #endif
 669         }
 670         return 0;
 671 }
 672
 673 /* find the inode from the slashless name given a parent */
 674 static long
 675 jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
 676 {
 677         struct b_node *b;
 678         struct jffs2_raw_inode *jNode;
 679         u32 totalSize = 0;
 680         u32 latestVersion = 0;
 681         uchar *lDest;
 682         uchar *src;
 683         int i;
 684         u32 counter = 0;
 685 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 686         /* Find file size before loading any data, so fragments that
 687          * start past the end of file can be ignored. A fragment
 688          * that is partially in the file is loaded, so extra data may
 689          * be loaded up to the next 4K boundary above the file size.
 690          * This shouldn't cause trouble when loading kernel images, so
 691          * we will live with it.
 692          */
 693         for (b = pL->frag.listHead; b != NULL; b = b->next) {
 694                 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
 695                         sizeof(struct jffs2_raw_inode), pL->readbuf);
 696                 if ((inode == jNode->ino)) {
 697                         /* get actual file length from the newest node */
 698                         if (jNode->version >= latestVersion) {
 699                                 totalSize = jNode->isize;
 700                                 latestVersion = jNode->version;
 701                         }
 702                 }
 703                 put_fl_mem(jNode, pL->readbuf);
 704         }
 705         /*
 706          * If no destination is provided, we are done.
 707          * Just return the total size.
 708          */
 709         if (!dest)
 710                 return totalSize;
 711 #endif
 712
 713         for (b = pL->frag.listHead; b != NULL; b = b->next) {
 714                 /*
 715                  * Copy just the node and not the data at this point,
 716                  * since we don't yet know if we need this data.
 717                  */
 718                 jNode = (struct jffs2_raw_inode *)get_fl_mem(b->offset,
 719                                 sizeof(struct jffs2_raw_inode),
 720                                 pL->readbuf);
 721                 if (inode == jNode->ino) {
 722 #if 0
 723                         putLabeledWord("\r\n\r\nread_inode: totlen = ", jNode->totlen);
 724                         putLabeledWord("read_inode: inode = ", jNode->ino);
 725                         putLabeledWord("read_inode: version = ", jNode->version);
 726                         putLabeledWord("read_inode: isize = ", jNode->isize);
 727                         putLabeledWord("read_inode: offset = ", jNode->offset);
 728                         putLabeledWord("read_inode: csize = ", jNode->csize);
 729                         putLabeledWord("read_inode: dsize = ", jNode->dsize);
 730                         putLabeledWord("read_inode: compr = ", jNode->compr);
 731                         putLabeledWord("read_inode: usercompr = ", jNode->usercompr);
 732                         putLabeledWord("read_inode: flags = ", jNode->flags);
 733 #endif
 734
 735 #ifndef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 736                         /* get actual file length from the newest node */
 737                         if (jNode->version >= latestVersion) {
 738                                 totalSize = jNode->isize;
 739                                 latestVersion = jNode->version;
 740                         }
 741 #endif
 742
 743                         if(dest) {
 744                                 /*
 745                                  * Now that the inode has been checked,
 746                                  * read the entire inode, including data.
 747                                  */
 748                                 put_fl_mem(jNode, pL->readbuf);
 749                                 jNode = (struct jffs2_raw_inode *)
 750                                         get_node_mem(b->offset, pL->readbuf);
 751                                 src = ((uchar *)jNode) +
 752                                         sizeof(struct jffs2_raw_inode);
 753                                 /* ignore data behind latest known EOF */
 754                                 if (jNode->offset > totalSize) {
 755                                         put_fl_mem(jNode, pL->readbuf);
 756                                         continue;
 757                                 }
 758                                 if (b->datacrc == CRC_UNKNOWN)
 759                                         b->datacrc = data_crc(jNode) ?
 760                                                 CRC_OK : CRC_BAD;
 761                                 if (b->datacrc == CRC_BAD) {
 762                                         put_fl_mem(jNode, pL->readbuf);
 763                                         continue;
 764                                 }
 765
 766                                 lDest = (uchar *) (dest + jNode->offset);
 767 #if 0
 768                                 putLabeledWord("read_inode: src = ", src);
 769                                 putLabeledWord("read_inode: dest = ", lDest);
 770 #endif
 771                                 switch (jNode->compr) {
 772                                 case JFFS2_COMPR_NONE:
 773                                         ldr_memcpy(lDest, src, jNode->dsize);
 774                                         break;
 775                                 case JFFS2_COMPR_ZERO:
 776                                         for (i = 0; i < jNode->dsize; i++)
 777                                                 *(lDest++) = 0;
 778                                         break;
 779                                 case JFFS2_COMPR_RTIME:
 780                                         rtime_decompress(src, lDest, jNode->csize, jNode->dsize);
 781                                         break;
 782                                 case JFFS2_COMPR_DYNRUBIN:
 783                                         /* this is slow but it works */
 784                                         dynrubin_decompress(src, lDest, jNode->csize, jNode->dsize);
 785                                         break;
 786                                 case JFFS2_COMPR_ZLIB:
 787                                         zlib_decompress(src, lDest, jNode->csize, jNode->dsize);
 788                                         break;
 789 #if defined(CONFIG_JFFS2_LZO)
 790                                 case JFFS2_COMPR_LZO:
 791                                         lzo_decompress(src, lDest, jNode->csize, jNode->dsize);
 792                                         break;
 793 #endif
 794                                 default:
 795                                         /* unknown */
 796                                         putLabeledWord("UNKNOWN COMPRESSION METHOD = ", jNode->compr);
 797                                         put_fl_mem(jNode, pL->readbuf);
 798                                         return -1;
 799                                         break;
 800                                 }
 801                         }
 802
 803 #if 0
 804                         putLabeledWord("read_inode: totalSize = ", totalSize);
 805 #endif
 806                 }
 807                 counter++;
 808                 put_fl_mem(jNode, pL->readbuf);
 809         }
 810
 811 #if 0
 812         putLabeledWord("read_inode: returning = ", totalSize);
 813 #endif
 814         return totalSize;
 815 }
 816
 817 /* find the inode from the slashless name given a parent */
 818 static u32
 819 jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino)
 820 {
 821         struct b_node *b;
 822         struct jffs2_raw_dirent *jDir;
 823         int len;
 824         u32 counter;
 825         u32 version = 0;
 826         u32 inode = 0;
 827
 828         /* name is assumed slash free */
 829         len = strlen(name);
 830
 831         counter = 0;
 832         /* we need to search all and return the inode with the highest version */
 833         for(b = pL->dir.listHead; b; b = b->next, counter++) {
 834                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
 835                                                                 pL->readbuf);
 836                 if ((pino == jDir->pino) && (len == jDir->nsize) &&
 837                     (!strncmp((char *)jDir->name, name, len))) {        /* a match */
 838                         if (jDir->version < version) {
 839                                 put_fl_mem(jDir, pL->readbuf);
 840                                 continue;
 841                         }
 842
 843                         if (jDir->version == version && inode != 0) {
 844                                 /* I'm pretty sure this isn't legal */
 845                                 putstr(" ** ERROR ** ");
 846                                 putnstr(jDir->name, jDir->nsize);
 847                                 putLabeledWord(" has dup version =", version);
 848                         }
 849                         inode = jDir->ino;
 850                         version = jDir->version;
 851                 }
 852 #if 0
 853                 putstr("\r\nfind_inode:p&l ->");
 854                 putnstr(jDir->name, jDir->nsize);
 855                 putstr("\r\n");
 856                 putLabeledWord("pino = ", jDir->pino);
 857                 putLabeledWord("nsize = ", jDir->nsize);
 858                 putLabeledWord("b = ", (u32) b);
 859                 putLabeledWord("counter = ", counter);
 860 #endif
 861                 put_fl_mem(jDir, pL->readbuf);
 862         }
 863         return inode;
 864 }
 865
 866 char *mkmodestr(unsigned long mode, char *str)
 867 {
 868         static const char *l = "xwr";
 869         int mask = 1, i;
 870         char c;
 871
 872         switch (mode & S_IFMT) {
 873                 case S_IFDIR:    str[0] = 'd'; break;
 874                 case S_IFBLK:    str[0] = 'b'; break;
 875                 case S_IFCHR:    str[0] = 'c'; break;
 876                 case S_IFIFO:    str[0] = 'f'; break;
 877                 case S_IFLNK:    str[0] = 'l'; break;
 878                 case S_IFSOCK:   str[0] = 's'; break;
 879                 case S_IFREG:    str[0] = '-'; break;
 880                 default:         str[0] = '?';
 881         }
 882
 883         for(i = 0; i < 9; i++) {
 884                 c = l[i%3];
 885                 str[9-i] = (mode & mask)?c:'-';
 886                 mask = mask<<1;
 887         }
 888
 889         if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
 890         if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
 891         if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
 892         str[10] = '\0';
 893         return str;
 894 }
 895
 896 static inline void dump_stat(struct stat *st, const char *name)
 897 {
 898         char str[20];
 899         char s[64], *p;
 900
 901         if (st->st_mtime == (time_t)(-1)) /* some ctimes really hate -1 */
 902                 st->st_mtime = 1;
 903
 904         ctime_r((time_t *)&st->st_mtime, s/*,64*/); /* newlib ctime doesn't have buflen */
 905
 906         if ((p = strchr(s,'\n')) != NULL) *p = '\0';
 907         if ((p = strchr(s,'\r')) != NULL) *p = '\0';
 908
 909 /*
 910         printf("%6lo %s %8ld %s %s\n", st->st_mode, mkmodestr(st->st_mode, str),
 911                 st->st_size, s, name);
 912 */
 913
 914         printf(" %s %8ld %s %s", mkmodestr(st->st_mode,str), st->st_size, s, name);
 915 }
 916
 917 static inline u32 dump_inode(struct b_lists * pL, struct jffs2_raw_dirent *d, struct jffs2_raw_inode *i)
 918 {
 919         char fname[256];
 920         struct stat st;
 921
 922         if(!d || !i) return -1;
 923
 924         strncpy(fname, (char *)d->name, d->nsize);
 925         fname[d->nsize] = '\0';
 926
 927         memset(&st,0,sizeof(st));
 928
 929         st.st_mtime = i->mtime;
 930         st.st_mode = i->mode;
 931         st.st_ino = i->ino;
 932         st.st_size = i->isize;
 933
 934         dump_stat(&st, fname);
 935
 936         if (d->type == DT_LNK) {
 937                 unsigned char *src = (unsigned char *) (&i[1]);
 938                 putstr(" -> ");
 939                 putnstr(src, (int)i->dsize);
 940         }
 941
 942         putstr("\r\n");
 943
 944         return 0;
 945 }
 946
 947 /* list inodes with the given pino */
 948 static u32
 949 jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino)
 950 {
 951         struct b_node *b;
 952         struct jffs2_raw_dirent *jDir;
 953
 954         for (b = pL->dir.listHead; b; b = b->next) {
 955                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
 956                                                                 pL->readbuf);
 957                 if (pino == jDir->pino) {
 958                         u32 i_version = 0;
 959                         struct jffs2_raw_inode *jNode, *i = NULL;
 960                         struct b_node *b2;
 961
 962 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
 963                         /* Check for more recent versions of this file */
 964                         int match;
 965                         do {
 966                                 struct b_node *next = b->next;
 967                                 struct jffs2_raw_dirent *jDirNext;
 968                                 if (!next)
 969                                         break;
 970                                 jDirNext = (struct jffs2_raw_dirent *)
 971                                         get_node_mem(next->offset, NULL);
 972                                 match = jDirNext->pino == jDir->pino &&
 973                                         jDirNext->nsize == jDir->nsize &&
 974                                         strncmp((char *)jDirNext->name,
 975                                                 (char *)jDir->name,
 976                                                 jDir->nsize) == 0;
 977                                 if (match) {
 978                                         /* Use next. It is more recent */
 979                                         b = next;
 980                                         /* Update buffer with the new info */
 981                                         *jDir = *jDirNext;
 982                                 }
 983                                 put_fl_mem(jDirNext, NULL);
 984                         } while (match);
 985 #endif
 986                         if (jDir->ino == 0) {
 987                                 /* Deleted file */
 988                                 put_fl_mem(jDir, pL->readbuf);
 989                                 continue;
 990                         }
 991
 992                         for (b2 = pL->frag.listHead; b2; b2 = b2->next) {
 993                                 jNode = (struct jffs2_raw_inode *)
 994                                         get_fl_mem(b2->offset, sizeof(*jNode),
 995                                                    NULL);
 996                                 if (jNode->ino == jDir->ino &&
 997                                     jNode->version >= i_version) {
 998                                         i_version = jNode->version;
 999                                         if (i)
1000                                                 put_fl_mem(i, NULL);
1001
1002                                         if (jDir->type == DT_LNK)
1003                                                 i = get_node_mem(b2->offset,
1004                                                                  NULL);
1005                                         else
1006                                                 i = get_fl_mem(b2->offset,
1007                                                                sizeof(*i),
1008                                                                NULL);
1009                                 }
1010                                 put_fl_mem(jNode, NULL);
1011                         }
1012
1013                         dump_inode(pL, jDir, i);
1014                         put_fl_mem(i, NULL);
1015                 }
1016                 put_fl_mem(jDir, pL->readbuf);
1017         }
1018         return pino;
1019 }
1020
1021 static u32
1022 jffs2_1pass_search_inode(struct b_lists * pL, const char *fname, u32 pino)
1023 {
1024         int i;
1025         char tmp[256];
1026         char working_tmp[256];
1027         char *c;
1028
1029         /* discard any leading slash */
1030         i = 0;
1031         while (fname[i] == '/')
1032                 i++;
1033         strcpy(tmp, &fname[i]);
1034
1035         while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
1036         {
1037                 strncpy(working_tmp, tmp, c - tmp);
1038                 working_tmp[c - tmp] = '\0';
1039 #if 0
1040                 putstr("search_inode: tmp = ");
1041                 putstr(tmp);
1042                 putstr("\r\n");
1043                 putstr("search_inode: wtmp = ");
1044                 putstr(working_tmp);
1045                 putstr("\r\n");
1046                 putstr("search_inode: c = ");
1047                 putstr(c);
1048                 putstr("\r\n");
1049 #endif
1050                 for (i = 0; i < strlen(c) - 1; i++)
1051                         tmp[i] = c[i + 1];
1052                 tmp[i] = '\0';
1053 #if 0
1054                 putstr("search_inode: post tmp = ");
1055                 putstr(tmp);
1056                 putstr("\r\n");
1057 #endif
1058
1059                 if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino))) {
1060                         putstr("find_inode failed for name=");
1061                         putstr(working_tmp);
1062                         putstr("\r\n");
1063                         return 0;
1064                 }
1065         }
1066         /* this is for the bare filename, directories have already been mapped */
1067         if (!(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
1068                 putstr("find_inode failed for name=");
1069                 putstr(tmp);
1070                 putstr("\r\n");
1071                 return 0;
1072         }
1073         return pino;
1074
1075 }
1076
1077 static u32
1078 jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
1079 {
1080         struct b_node *b;
1081         struct b_node *b2;
1082         struct jffs2_raw_dirent *jDir;
1083         struct jffs2_raw_inode *jNode;
1084         u8 jDirFoundType = 0;
1085         u32 jDirFoundIno = 0;
1086         u32 jDirFoundPino = 0;
1087         char tmp[256];
1088         u32 version = 0;
1089         u32 pino;
1090         unsigned char *src;
1091
1092         /* we need to search all and return the inode with the highest version */
1093         for(b = pL->dir.listHead; b; b = b->next) {
1094                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
1095                                                                 pL->readbuf);
1096                 if (ino == jDir->ino) {
1097                         if (jDir->version < version) {
1098                                 put_fl_mem(jDir, pL->readbuf);
1099                                 continue;
1100                         }
1101
1102                         if (jDir->version == version && jDirFoundType) {
1103                                 /* I'm pretty sure this isn't legal */
1104                                 putstr(" ** ERROR ** ");
1105                                 putnstr(jDir->name, jDir->nsize);
1106                                 putLabeledWord(" has dup version (resolve) = ",
1107                                         version);
1108                         }
1109
1110                         jDirFoundType = jDir->type;
1111                         jDirFoundIno = jDir->ino;
1112                         jDirFoundPino = jDir->pino;
1113                         version = jDir->version;
1114                 }
1115                 put_fl_mem(jDir, pL->readbuf);
1116         }
1117         /* now we found the right entry again. (shoulda returned inode*) */
1118         if (jDirFoundType != DT_LNK)
1119                 return jDirFoundIno;
1120
1121         /* it's a soft link so we follow it again. */
1122         b2 = pL->frag.listHead;
1123         while (b2) {
1124                 jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset,
1125                                                                 pL->readbuf);
1126                 if (jNode->ino == jDirFoundIno) {
1127                         src = (unsigned char *)jNode + sizeof(struct jffs2_raw_inode);
1128
1129 #if 0
1130                         putLabeledWord("\t\t dsize = ", jNode->dsize);
1131                         putstr("\t\t target = ");
1132                         putnstr(src, jNode->dsize);
1133                         putstr("\r\n");
1134 #endif
1135                         strncpy(tmp, (char *)src, jNode->dsize);
1136                         tmp[jNode->dsize] = '\0';
1137                         put_fl_mem(jNode, pL->readbuf);
1138                         break;
1139                 }
1140                 b2 = b2->next;
1141                 put_fl_mem(jNode, pL->readbuf);
1142         }
1143         /* ok so the name of the new file to find is in tmp */
1144         /* if it starts with a slash it is root based else shared dirs */
1145         if (tmp[0] == '/')
1146                 pino = 1;
1147         else
1148                 pino = jDirFoundPino;
1149
1150         return jffs2_1pass_search_inode(pL, tmp, pino);
1151 }
1152
1153 static u32
1154 jffs2_1pass_search_list_inodes(struct b_lists * pL, const char *fname, u32 pino)
1155 {
1156         int i;
1157         char tmp[256];
1158         char working_tmp[256];
1159         char *c;
1160
1161         /* discard any leading slash */
1162         i = 0;
1163         while (fname[i] == '/')
1164                 i++;
1165         strcpy(tmp, &fname[i]);
1166         working_tmp[0] = '\0';
1167         while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
1168         {
1169                 strncpy(working_tmp, tmp, c - tmp);
1170                 working_tmp[c - tmp] = '\0';
1171                 for (i = 0; i < strlen(c) - 1; i++)
1172                         tmp[i] = c[i + 1];
1173                 tmp[i] = '\0';
1174                 /* only a failure if we arent looking at top level */
1175                 if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino)) &&
1176                     (working_tmp[0])) {
1177                         putstr("find_inode failed for name=");
1178                         putstr(working_tmp);
1179                         putstr("\r\n");
1180                         return 0;
1181                 }
1182         }
1183
1184         if (tmp[0] && !(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
1185                 putstr("find_inode failed for name=");
1186                 putstr(tmp);
1187                 putstr("\r\n");
1188                 return 0;
1189         }
1190         /* this is for the bare filename, directories have already been mapped */
1191         if (!(pino = jffs2_1pass_list_inodes(pL, pino))) {
1192                 putstr("find_inode failed for name=");
1193                 putstr(tmp);
1194                 putstr("\r\n");
1195                 return 0;
1196         }
1197         return pino;
1198
1199 }
1200
1201 unsigned char
1202 jffs2_1pass_rescan_needed(struct part_info *part)
1203 {
1204         struct b_node *b;
1205         struct jffs2_unknown_node onode;
1206         struct jffs2_unknown_node *node;
1207         struct b_lists *pL = (struct b_lists *)part->jffs2_priv;
1208
1209         if (part->jffs2_priv == 0){
1210                 DEBUGF ("rescan: First time in use\n");
1211                 return 1;
1212         }
1213
1214         /* if we have no list, we need to rescan */
1215         if (pL->frag.listCount == 0) {
1216                 DEBUGF ("rescan: fraglist zero\n");
1217                 return 1;
1218         }
1219
1220         /* but suppose someone reflashed a partition at the same offset... */
1221         b = pL->dir.listHead;
1222         while (b) {
1223                 node = (struct jffs2_unknown_node *) get_fl_mem(b->offset,
1224                         sizeof(onode), &onode);
1225                 if (node->nodetype != JFFS2_NODETYPE_DIRENT) {
1226                         DEBUGF ("rescan: fs changed beneath me? (%lx)\n",
1227                                         (unsigned long) b->offset);
1228                         return 1;
1229                 }
1230                 b = b->next;
1231         }
1232         return 0;
1233 }
1234
1235 #ifdef CONFIG_JFFS2_SUMMARY
1236 static u32 sum_get_unaligned32(u32 *ptr)
1237 {
1238         u32 val;
1239         u8 *p = (u8 *)ptr;
1240
1241         val = *p | (*(p + 1) << 8) | (*(p + 2) << 16) | (*(p + 3) << 24);
1242
1243         return __le32_to_cpu(val);
1244 }
1245
1246 static u16 sum_get_unaligned16(u16 *ptr)
1247 {
1248         u16 val;
1249         u8 *p = (u8 *)ptr;
1250
1251         val = *p | (*(p + 1) << 8);
1252
1253         return __le16_to_cpu(val);
1254 }
1255
1256 #define dbg_summary(...) do {} while (0);
1257 /*
1258  * Process the stored summary information - helper function for
1259  * jffs2_sum_scan_sumnode()
1260  */
1261
1262 static int jffs2_sum_process_sum_data(struct part_info *part, uint32_t offset,
1263                                 struct jffs2_raw_summary *summary,
1264                                 struct b_lists *pL)
1265 {
1266         void *sp;
1267         int i, pass;
1268         void *ret;
1269
1270         for (pass = 0; pass < 2; pass++) {
1271                 sp = summary->sum;
1272
1273                 for (i = 0; i < summary->sum_num; i++) {
1274                         struct jffs2_sum_unknown_flash *spu = sp;
1275                         dbg_summary("processing summary index %d\n", i);
1276
1277                         switch (sum_get_unaligned16(&spu->nodetype)) {
1278                                 case JFFS2_NODETYPE_INODE: {
1279                                 struct jffs2_sum_inode_flash *spi;
1280                                         if (pass) {
1281                                                 spi = sp;
1282
1283                                                 ret = insert_node(&pL->frag,
1284                                                         (u32)part->offset +
1285                                                         offset +
1286                                                         sum_get_unaligned32(
1287                                                                 &spi->offset));
1288                                                 if (ret == NULL)
1289                                                         return -1;
1290                                         }
1291
1292                                         sp += JFFS2_SUMMARY_INODE_SIZE;
1293
1294                                         break;
1295                                 }
1296                                 case JFFS2_NODETYPE_DIRENT: {
1297                                         struct jffs2_sum_dirent_flash *spd;
1298                                         spd = sp;
1299                                         if (pass) {
1300                                                 ret = insert_node(&pL->dir,
1301                                                         (u32) part->offset +
1302                                                         offset +
1303                                                         sum_get_unaligned32(
1304                                                                 &spd->offset));
1305                                                 if (ret == NULL)
1306                                                         return -1;
1307                                         }
1308
1309                                         sp += JFFS2_SUMMARY_DIRENT_SIZE(
1310                                                         spd->nsize);
1311
1312                                         break;
1313                                 }
1314                                 default : {
1315                                         uint16_t nodetype = sum_get_unaligned16(
1316                                                                 &spu->nodetype);
1317                                         printf("Unsupported node type %x found"
1318                                                         " in summary!\n",
1319                                                         nodetype);
1320                                         if ((nodetype & JFFS2_COMPAT_MASK) ==
1321                                                         JFFS2_FEATURE_INCOMPAT)
1322                                                 return -EIO;
1323                                         return -EBADMSG;
1324                                 }
1325                         }
1326                 }
1327         }
1328         return 0;
1329 }
1330
1331 /* Process the summary node - called from jffs2_scan_eraseblock() */
1332 int jffs2_sum_scan_sumnode(struct part_info *part, uint32_t offset,
1333                            struct jffs2_raw_summary *summary, uint32_t sumsize,
1334                            struct b_lists *pL)
1335 {
1336         struct jffs2_unknown_node crcnode;
1337         int ret, __maybe_unused ofs;
1338         uint32_t crc;
1339
1340         ofs = part->sector_size - sumsize;
1341
1342         dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
1343                     offset, offset + ofs, sumsize);
1344
1345         /* OK, now check for node validity and CRC */
1346         crcnode.magic = JFFS2_MAGIC_BITMASK;
1347         crcnode.nodetype = JFFS2_NODETYPE_SUMMARY;
1348         crcnode.totlen = summary->totlen;
1349         crc = crc32_no_comp(0, (uchar *)&crcnode, sizeof(crcnode)-4);
1350
1351         if (summary->hdr_crc != crc) {
1352                 dbg_summary("Summary node header is corrupt (bad CRC or "
1353                                 "no summary at all)\n");
1354                 goto crc_err;
1355         }
1356
1357         if (summary->totlen != sumsize) {
1358                 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
1359                 goto crc_err;
1360         }
1361
1362         crc = crc32_no_comp(0, (uchar *)summary,
1363                         sizeof(struct jffs2_raw_summary)-8);
1364
1365         if (summary->node_crc != crc) {
1366                 dbg_summary("Summary node is corrupt (bad CRC)\n");
1367                 goto crc_err;
1368         }
1369
1370         crc = crc32_no_comp(0, (uchar *)summary->sum,
1371                         sumsize - sizeof(struct jffs2_raw_summary));
1372
1373         if (summary->sum_crc != crc) {
1374                 dbg_summary("Summary node data is corrupt (bad CRC)\n");
1375                 goto crc_err;
1376         }
1377
1378         if (summary->cln_mkr)
1379                 dbg_summary("Summary : CLEANMARKER node \n");
1380
1381         ret = jffs2_sum_process_sum_data(part, offset, summary, pL);
1382         if (ret == -EBADMSG)
1383                 return 0;
1384         if (ret)
1385                 return ret;             /* real error */
1386
1387         return 1;
1388
1389 crc_err:
1390         putstr("Summary node crc error, skipping summary information.\n");
1391
1392         return 0;
1393 }
1394 #endif /* CONFIG_JFFS2_SUMMARY */
1395
1396 #ifdef DEBUG_FRAGMENTS
1397 static void
1398 dump_fragments(struct b_lists *pL)
1399 {
1400         struct b_node *b;
1401         struct jffs2_raw_inode ojNode;
1402         struct jffs2_raw_inode *jNode;
1403
1404         putstr("\r\n\r\n******The fragment Entries******\r\n");
1405         b = pL->frag.listHead;
1406         while (b) {
1407                 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
1408                         sizeof(ojNode), &ojNode);
1409                 putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset);
1410                 putLabeledWord("\tbuild_list: totlen = ", jNode->totlen);
1411                 putLabeledWord("\tbuild_list: inode = ", jNode->ino);
1412                 putLabeledWord("\tbuild_list: version = ", jNode->version);
1413                 putLabeledWord("\tbuild_list: isize = ", jNode->isize);
1414                 putLabeledWord("\tbuild_list: atime = ", jNode->atime);
1415                 putLabeledWord("\tbuild_list: offset = ", jNode->offset);
1416                 putLabeledWord("\tbuild_list: csize = ", jNode->csize);
1417                 putLabeledWord("\tbuild_list: dsize = ", jNode->dsize);
1418                 putLabeledWord("\tbuild_list: compr = ", jNode->compr);
1419                 putLabeledWord("\tbuild_list: usercompr = ", jNode->usercompr);
1420                 putLabeledWord("\tbuild_list: flags = ", jNode->flags);
1421                 putLabeledWord("\tbuild_list: offset = ", b->offset);   /* FIXME: ? [RS] */
1422                 b = b->next;
1423         }
1424 }
1425 #endif
1426
1427 #ifdef DEBUG_DIRENTS
1428 static void
1429 dump_dirents(struct b_lists *pL)
1430 {
1431         struct b_node *b;
1432         struct jffs2_raw_dirent *jDir;
1433
1434         putstr("\r\n\r\n******The directory Entries******\r\n");
1435         b = pL->dir.listHead;
1436         while (b) {
1437                 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
1438                                                                 pL->readbuf);
1439                 putstr("\r\n");
1440                 putnstr(jDir->name, jDir->nsize);
1441                 putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
1442                 putLabeledWord("\tbuild_list: nodetype = ", jDir->nodetype);
1443                 putLabeledWord("\tbuild_list: hdr_crc = ", jDir->hdr_crc);
1444                 putLabeledWord("\tbuild_list: pino = ", jDir->pino);
1445                 putLabeledWord("\tbuild_list: version = ", jDir->version);
1446                 putLabeledWord("\tbuild_list: ino = ", jDir->ino);
1447                 putLabeledWord("\tbuild_list: mctime = ", jDir->mctime);
1448                 putLabeledWord("\tbuild_list: nsize = ", jDir->nsize);
1449                 putLabeledWord("\tbuild_list: type = ", jDir->type);
1450                 putLabeledWord("\tbuild_list: node_crc = ", jDir->node_crc);
1451                 putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc);
1452                 putLabeledWord("\tbuild_list: offset = ", b->offset);   /* FIXME: ? [RS] */
1453                 b = b->next;
1454                 put_fl_mem(jDir, pL->readbuf);
1455         }
1456 }
1457 #endif
1458
1459 #define DEFAULT_EMPTY_SCAN_SIZE 256
1460
1461 static inline uint32_t EMPTY_SCAN_SIZE(uint32_t sector_size)
1462 {
1463         if (sector_size < DEFAULT_EMPTY_SCAN_SIZE)
1464                 return sector_size;
1465         else
1466                 return DEFAULT_EMPTY_SCAN_SIZE;
1467 }
1468
1469 static u32
1470 jffs2_1pass_build_lists(struct part_info * part)
1471 {
1472         struct b_lists *pL;
1473         struct jffs2_unknown_node *node;
1474         u32 nr_sectors;
1475         u32 i;
1476         u32 counter4 = 0;
1477         u32 counterF = 0;
1478         u32 counterN = 0;
1479         u32 max_totlen = 0;
1480         u32 buf_size;
1481         char *buf;
1482
1483         nr_sectors = lldiv(part->size, part->sector_size);
1484         /* turn off the lcd.  Refreshing the lcd adds 50% overhead to the */
1485         /* jffs2 list building enterprise nope.  in newer versions the overhead is */
1486         /* only about 5 %.  not enough to inconvenience people for. */
1487         /* lcd_off(); */
1488
1489         /* if we are building a list we need to refresh the cache. */
1490         jffs_init_1pass_list(part);
1491         pL = (struct b_lists *)part->jffs2_priv;
1492         buf = malloc(DEFAULT_EMPTY_SCAN_SIZE);
1493         puts ("Scanning JFFS2 FS:   ");
1494
1495         /* start at the beginning of the partition */
1496         for (i = 0; i < nr_sectors; i++) {
1497                 uint32_t sector_ofs = i * part->sector_size;
1498                 uint32_t buf_ofs = sector_ofs;
1499                 uint32_t buf_len;
1500                 uint32_t ofs, prevofs;
1501 #ifdef CONFIG_JFFS2_SUMMARY
1502                 struct jffs2_sum_marker *sm;
1503                 void *sumptr = NULL;
1504                 uint32_t sumlen;
1505                 int ret;
1506 #endif
1507                 /* Indicates a sector with a CLEANMARKER was found */
1508                 int clean_sector = 0;
1509
1510                 /* Set buf_size to maximum length */
1511                 buf_size = DEFAULT_EMPTY_SCAN_SIZE;
1512                 WATCHDOG_RESET();
1513
1514 #ifdef CONFIG_JFFS2_SUMMARY
1515                 buf_len = sizeof(*sm);
1516
1517                 /* Read as much as we want into the _end_ of the preallocated
1518                  * buffer
1519                  */
1520                 get_fl_mem(part->offset + sector_ofs + part->sector_size -
1521                                 buf_len, buf_len, buf + buf_size - buf_len);
1522
1523                 sm = (void *)buf + buf_size - sizeof(*sm);
1524                 if (sm->magic == JFFS2_SUM_MAGIC) {
1525                         sumlen = part->sector_size - sm->offset;
1526                         sumptr = buf + buf_size - sumlen;
1527
1528                         /* Now, make sure the summary itself is available */
1529                         if (sumlen > buf_size) {
1530                                 /* Need to kmalloc for this. */
1531                                 sumptr = malloc(sumlen);
1532                                 if (!sumptr) {
1533                                         putstr("Can't get memory for summary "
1534                                                         "node!\n");
1535                                         free(buf);
1536                                         jffs2_free_cache(part);
1537                                         return 0;
1538                                 }
1539                                 memcpy(sumptr + sumlen - buf_len, buf +
1540                                                 buf_size - buf_len, buf_len);
1541                         }
1542                         if (buf_len < sumlen) {
1543                                 /* Need to read more so that the entire summary
1544                                  * node is present
1545                                  */
1546                                 get_fl_mem(part->offset + sector_ofs +
1547                                                 part->sector_size - sumlen,
1548                                                 sumlen - buf_len, sumptr);
1549                         }
1550                 }
1551
1552                 if (sumptr) {
1553                         ret = jffs2_sum_scan_sumnode(part, sector_ofs, sumptr,
1554                                         sumlen, pL);
1555
1556                         if (buf_size && sumlen > buf_size)
1557                                 free(sumptr);
1558                         if (ret < 0) {
1559                                 free(buf);
1560                                 jffs2_free_cache(part);
1561                                 return 0;
1562                         }
1563                         if (ret)
1564                                 continue;
1565
1566                 }
1567 #endif /* CONFIG_JFFS2_SUMMARY */
1568
1569                 buf_len = EMPTY_SCAN_SIZE(part->sector_size);
1570
1571                 get_fl_mem((u32)part->offset + buf_ofs, buf_len, buf);
1572
1573                 /* We temporarily use 'ofs' as a pointer into the buffer/jeb */
1574                 ofs = 0;
1575
1576                 /* Scan only 4KiB of 0xFF before declaring it's empty */
1577                 while (ofs < EMPTY_SCAN_SIZE(part->sector_size) &&
1578                                 *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
1579                         ofs += 4;
1580
1581                 if (ofs == EMPTY_SCAN_SIZE(part->sector_size))
1582                         continue;
1583
1584                 ofs += sector_ofs;
1585                 prevofs = ofs - 1;
1586                 /*
1587                  * Set buf_size down to the minimum size required.
1588                  * This prevents reading in chunks of flash data unnecessarily.
1589                  */
1590                 buf_size = sizeof(union jffs2_node_union);
1591
1592         scan_more:
1593                 while (ofs < sector_ofs + part->sector_size) {
1594                         if (ofs == prevofs) {
1595                                 printf("offset %08x already seen, skip\n", ofs);
1596                                 ofs += 4;
1597                                 counter4++;
1598                                 continue;
1599                         }
1600                         prevofs = ofs;
1601                         if (sector_ofs + part->sector_size <
1602                                         ofs + sizeof(*node))
1603                                 break;
1604                         if (buf_ofs + buf_len < ofs + sizeof(*node)) {
1605                                 buf_len = min_t(uint32_t, buf_size, sector_ofs
1606                                                 + part->sector_size - ofs);
1607                                 get_fl_mem((u32)part->offset + ofs, buf_len,
1608                                            buf);
1609                                 buf_ofs = ofs;
1610                         }
1611
1612                         node = (struct jffs2_unknown_node *)&buf[ofs-buf_ofs];
1613
1614                         if (*(uint32_t *)(&buf[ofs-buf_ofs]) == 0xffffffff) {
1615                                 uint32_t inbuf_ofs;
1616                                 uint32_t scan_end;
1617
1618                                 ofs += 4;
1619                                 scan_end = min_t(uint32_t, EMPTY_SCAN_SIZE(
1620                                                         part->sector_size)/8,
1621                                                         buf_len);
1622                         more_empty:
1623                                 inbuf_ofs = ofs - buf_ofs;
1624                                 while (inbuf_ofs < scan_end) {
1625                                         if (*(uint32_t *)(&buf[inbuf_ofs]) !=
1626                                                         0xffffffff)
1627                                                 goto scan_more;
1628
1629                                         inbuf_ofs += 4;
1630                                         ofs += 4;
1631                                 }
1632                                 /* Ran off end. */
1633                                 /*
1634                                  * If this sector had a clean marker at the
1635                                  * beginning, and immediately following this
1636                                  * have been a bunch of FF bytes, treat the
1637                                  * entire sector as empty.
1638                                  */
1639                                 if (clean_sector)
1640                                         break;
1641
1642                                 /* See how much more there is to read in this
1643                                  * eraseblock...
1644                                  */
1645                                 buf_len = min_t(uint32_t, buf_size,
1646                                                 sector_ofs +
1647                                                 part->sector_size - ofs);
1648                                 if (!buf_len) {
1649                                         /* No more to read. Break out of main
1650                                          * loop without marking this range of
1651                                          * empty space as dirty (because it's
1652                                          * not)
1653                                          */
1654                                         break;
1655                                 }
1656                                 scan_end = buf_len;
1657                                 get_fl_mem((u32)part->offset + ofs, buf_len,
1658                                            buf);
1659                                 buf_ofs = ofs;
1660                                 goto more_empty;
1661                         }
1662                         /*
1663                          * Found something not erased in the sector, so reset
1664                          * the 'clean_sector' flag.
1665                          */
1666                         clean_sector = 0;
1667                         if (node->magic != JFFS2_MAGIC_BITMASK ||
1668                                         !hdr_crc(node)) {
1669                                 ofs += 4;
1670                                 counter4++;
1671                                 continue;
1672                         }
1673                         if (ofs + node->totlen >
1674                                         sector_ofs + part->sector_size) {
1675                                 ofs += 4;
1676                                 counter4++;
1677                                 continue;
1678                         }
1679                         /* if its a fragment add it */
1680                         switch (node->nodetype) {
1681                         case JFFS2_NODETYPE_INODE:
1682                                 if (buf_ofs + buf_len < ofs + sizeof(struct
1683                                                         jffs2_raw_inode)) {
1684                                         buf_len = min_t(uint32_t,
1685                                                         sizeof(struct jffs2_raw_inode),
1686                                                         sector_ofs +
1687                                                         part->sector_size -
1688                                                         ofs);
1689                                         get_fl_mem((u32)part->offset + ofs,
1690                                                    buf_len, buf);
1691                                         buf_ofs = ofs;
1692                                         node = (void *)buf;
1693                                 }
1694                                 if (!inode_crc((struct jffs2_raw_inode *)node))
1695                                         break;
1696
1697                                 if (insert_node(&pL->frag, (u32) part->offset +
1698                                                 ofs) == NULL) {
1699                                         free(buf);
1700                                         jffs2_free_cache(part);
1701                                         return 0;
1702                                 }
1703                                 if (max_totlen < node->totlen)
1704                                         max_totlen = node->totlen;
1705                                 break;
1706                         case JFFS2_NODETYPE_DIRENT:
1707                                 if (buf_ofs + buf_len < ofs + sizeof(struct
1708                                                         jffs2_raw_dirent) +
1709                                                         ((struct
1710                                                          jffs2_raw_dirent *)
1711                                                         node)->nsize) {
1712                                         buf_len = min_t(uint32_t,
1713                                                         node->totlen,
1714                                                         sector_ofs +
1715                                                         part->sector_size -
1716                                                         ofs);
1717                                         get_fl_mem((u32)part->offset + ofs,
1718                                                    buf_len, buf);
1719                                         buf_ofs = ofs;
1720                                         node = (void *)buf;
1721                                 }
1722
1723                                 if (!dirent_crc((struct jffs2_raw_dirent *)
1724                                                         node) ||
1725                                                 !dirent_name_crc(
1726                                                         (struct
1727                                                          jffs2_raw_dirent *)
1728                                                         node))
1729                                         break;
1730                                 if (! (counterN%100))
1731                                         puts ("\b\b.  ");
1732                                 if (insert_node(&pL->dir, (u32) part->offset +
1733                                                 ofs) == NULL) {
1734                                         free(buf);
1735                                         jffs2_free_cache(part);
1736                                         return 0;
1737                                 }
1738                                 if (max_totlen < node->totlen)
1739                                         max_totlen = node->totlen;
1740                                 counterN++;
1741                                 break;
1742                         case JFFS2_NODETYPE_CLEANMARKER:
1743                                 if (node->totlen != sizeof(struct jffs2_unknown_node))
1744                                         printf("OOPS Cleanmarker has bad size "
1745                                                 "%d != %zu\n",
1746                                                 node->totlen,
1747                                                 sizeof(struct jffs2_unknown_node));
1748                                 if ((node->totlen ==
1749                                      sizeof(struct jffs2_unknown_node)) &&
1750                                     (ofs == sector_ofs)) {
1751                                         /*
1752                                          * Found a CLEANMARKER at the beginning
1753                                          * of the sector. It's in the correct
1754                                          * place with correct size and CRC.
1755                                          */
1756                                         clean_sector = 1;
1757                                 }
1758                                 break;
1759                         case JFFS2_NODETYPE_PADDING:
1760                                 if (node->totlen < sizeof(struct jffs2_unknown_node))
1761                                         printf("OOPS Padding has bad size "
1762                                                 "%d < %zu\n",
1763                                                 node->totlen,
1764                                                 sizeof(struct jffs2_unknown_node));
1765                                 break;
1766                         case JFFS2_NODETYPE_SUMMARY:
1767                                 break;
1768                         default:
1769                                 printf("Unknown node type: %x len %d offset 0x%x\n",
1770                                         node->nodetype,
1771                                         node->totlen, ofs);
1772                         }
1773                         ofs += ((node->totlen + 3) & ~3);
1774                         counterF++;
1775                 }
1776         }
1777
1778         free(buf);
1779 #if defined(CONFIG_SYS_JFFS2_SORT_FRAGMENTS)
1780         /*
1781          * Sort the lists.
1782          */
1783         sort_list(&pL->frag);
1784         sort_list(&pL->dir);
1785 #endif
1786         putstr("\b\b done.\r\n");               /* close off the dots */
1787
1788         /* We don't care if malloc failed - then each read operation will
1789          * allocate its own buffer as necessary (NAND) or will read directly
1790          * from flash (NOR).
1791          */
1792         pL->readbuf = malloc(max_totlen);
1793
1794         /* turn the lcd back on. */
1795         /* splash(); */
1796
1797 #if 0
1798         putLabeledWord("dir entries = ", pL->dir.listCount);
1799         putLabeledWord("frag entries = ", pL->frag.listCount);
1800         putLabeledWord("+4 increments = ", counter4);
1801         putLabeledWord("+file_offset increments = ", counterF);
1802
1803 #endif
1804
1805 #ifdef DEBUG_DIRENTS
1806         dump_dirents(pL);
1807 #endif
1808
1809 #ifdef DEBUG_FRAGMENTS
1810         dump_fragments(pL);
1811 #endif
1812
1813         /* give visual feedback that we are done scanning the flash */
1814         led_blink(0x0, 0x0, 0x1, 0x1);  /* off, forever, on 100ms, off 100ms */
1815         return 1;
1816 }
1817
1818
1819 static u32
1820 jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL)
1821 {
1822         struct b_node *b;
1823         struct jffs2_raw_inode ojNode;
1824         struct jffs2_raw_inode *jNode;
1825         int i;
1826
1827         for (i = 0; i < JFFS2_NUM_COMPR; i++) {
1828                 piL->compr_info[i].num_frags = 0;
1829                 piL->compr_info[i].compr_sum = 0;
1830                 piL->compr_info[i].decompr_sum = 0;
1831         }
1832
1833         b = pL->frag.listHead;
1834         while (b) {
1835                 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
1836                         sizeof(ojNode), &ojNode);
1837                 if (jNode->compr < JFFS2_NUM_COMPR) {
1838                         piL->compr_info[jNode->compr].num_frags++;
1839                         piL->compr_info[jNode->compr].compr_sum += jNode->csize;
1840                         piL->compr_info[jNode->compr].decompr_sum += jNode->dsize;
1841                 }
1842                 b = b->next;
1843         }
1844         return 0;
1845 }
1846
1847
1848 static struct b_lists *
1849 jffs2_get_list(struct part_info * part, const char *who)
1850 {
1851         /* copy requested part_info struct pointer to global location */
1852         current_part = part;
1853
1854         if (jffs2_1pass_rescan_needed(part)) {
1855                 if (!jffs2_1pass_build_lists(part)) {
1856                         printf("%s: Failed to scan JFFSv2 file structure\n", who);
1857                         return NULL;
1858                 }
1859         }
1860         return (struct b_lists *)part->jffs2_priv;
1861 }
1862
1863
1864 /* Print directory / file contents */
1865 u32
1866 jffs2_1pass_ls(struct part_info * part, const char *fname)
1867 {
1868         struct b_lists *pl;
1869         long ret = 1;
1870         u32 inode;
1871
1872         if (! (pl = jffs2_get_list(part, "ls")))
1873                 return 0;
1874
1875         if (! (inode = jffs2_1pass_search_list_inodes(pl, fname, 1))) {
1876                 putstr("ls: Failed to scan jffs2 file structure\r\n");
1877                 return 0;
1878         }
1879
1880
1881 #if 0
1882         putLabeledWord("found file at inode = ", inode);
1883         putLabeledWord("read_inode returns = ", ret);
1884 #endif
1885
1886         return ret;
1887 }
1888
1889
1890 /* Load a file from flash into memory. fname can be a full path */
1891 u32
1892 jffs2_1pass_load(char *dest, struct part_info * part, const char *fname)
1893 {
1894
1895         struct b_lists *pl;
1896         long ret = 1;
1897         u32 inode;
1898
1899         if (! (pl  = jffs2_get_list(part, "load")))
1900                 return 0;
1901
1902         if (! (inode = jffs2_1pass_search_inode(pl, fname, 1))) {
1903                 putstr("load: Failed to find inode\r\n");
1904                 return 0;
1905         }
1906
1907         /* Resolve symlinks */
1908         if (! (inode = jffs2_1pass_resolve_inode(pl, inode))) {
1909                 putstr("load: Failed to resolve inode structure\r\n");
1910                 return 0;
1911         }
1912
1913         if ((ret = jffs2_1pass_read_inode(pl, inode, dest)) < 0) {
1914                 putstr("load: Failed to read inode\r\n");
1915                 return 0;
1916         }
1917
1918         DEBUGF ("load: loaded '%s' to 0x%lx (%ld bytes)\n", fname,
1919                                 (unsigned long) dest, ret);
1920         return ret;
1921 }
1922
1923 /* Return information about the fs on this partition */
1924 u32
1925 jffs2_1pass_info(struct part_info * part)
1926 {
1927         struct b_jffs2_info info;
1928         struct b_lists *pl;
1929         int i;
1930
1931         if (! (pl  = jffs2_get_list(part, "info")))
1932                 return 0;
1933
1934         jffs2_1pass_fill_info(pl, &info);
1935         for (i = 0; i < JFFS2_NUM_COMPR; i++) {
1936                 printf ("Compression: %s\n"
1937                         "\tfrag count: %d\n"
1938                         "\tcompressed sum: %d\n"
1939                         "\tuncompressed sum: %d\n",
1940                         compr_names[i],
1941                         info.compr_info[i].num_frags,
1942                         info.compr_info[i].compr_sum,
1943                         info.compr_info[i].decompr_sum);
1944         }
1945         return 1;
1946 }