2 -------------------------------------------------------------------------
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 *-----------------------------------------------------------------------*/
10 * some portions of this code are taken from jffs2, and as such, the
11 * following copyright notice is included.
13 * JFFS2 -- Journalling Flash File System, Version 2.
15 * Copyright (C) 2001 Red Hat, Inc.
17 * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
19 * The original JFFS, from which the design for JFFS2 was derived,
20 * was designed and implemented by Axis Communications AB.
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/
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.
32 * The Original Code is JFFS2 - Journalling Flash File System, version 2
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.
45 * $Id: jffs2_1pass.c,v 1.7 2002/01/25 01:56:47 nyet Exp $
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
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
67 * Adapted by Nye Liu <nyet@zumanetworks.com> and
68 * Rex Feany <rfeany@zumanetworks.com>
69 * on Jan/2002 for U-Boot.
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 ;).
79 * Bugfixing by Kai-Uwe Bloem <kai-uwe.bloem@auerswald.de>, (C) Mar/2003
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.
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
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.
95 * The fragment sorting feature must be enabled by CFG_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.
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.
104 * There's a big issue left: endianess is completely ignored in this code. Duh!
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!
117 #include <linux/stat.h>
118 #include <linux/time.h>
120 #if defined(CONFIG_CMD_JFFS2)
122 #include <jffs2/jffs2.h>
123 #include <jffs2/jffs2_1pass.h>
125 #include "jffs2_private.h"
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 */
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 */
138 # define DEBUGF(fmt,args...) printf(fmt ,##args)
140 # define DEBUGF(fmt,args...)
143 /* keeps pointer to currentlu processed partition */
144 static struct part_info *current_part;
146 #if (defined(CONFIG_JFFS2_NAND) && \
147 defined(CONFIG_CMD_NAND) )
148 #if defined(CFG_NAND_LEGACY)
149 #include <linux/mtd/nand_legacy.h>
154 * Support for jffs2 on top of NAND-flash
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
163 #if defined(CFG_NAND_LEGACY)
164 /* this one defined in nand_legacy.c */
165 int read_jffs2_nand(size_t start, size_t len,
166 size_t * retlen, u_char * buf, int nanddev);
168 /* info for NAND chips, defined in drivers/nand/nand.c */
169 extern nand_info_t nand_info[];
172 #define NAND_PAGE_SIZE 512
173 #define NAND_PAGE_SHIFT 9
174 #define NAND_PAGE_MASK (~(NAND_PAGE_SIZE-1))
176 #ifndef NAND_CACHE_PAGES
177 #define NAND_CACHE_PAGES 16
179 #define NAND_CACHE_SIZE (NAND_CACHE_PAGES*NAND_PAGE_SIZE)
181 static u8* nand_cache = NULL;
182 static u32 nand_cache_off = (u32)-1;
184 static int read_nand_cached(u32 off, u32 size, u_char *buf)
186 struct mtdids *id = current_part->dev->id;
188 #if defined(CFG_NAND_LEGACY)
195 while (bytes_read < size) {
196 if ((off + bytes_read < nand_cache_off) ||
197 (off + bytes_read >= nand_cache_off+NAND_CACHE_SIZE)) {
198 nand_cache_off = (off + bytes_read) & NAND_PAGE_MASK;
200 /* This memory never gets freed but 'cause
201 it's a bootloader, nobody cares */
202 nand_cache = malloc(NAND_CACHE_SIZE);
204 printf("read_nand_cached: can't alloc cache size %d bytes\n",
210 #if defined(CFG_NAND_LEGACY)
211 if (read_jffs2_nand(nand_cache_off, NAND_CACHE_SIZE,
212 &retlen, nand_cache, id->num) < 0 ||
213 retlen != NAND_CACHE_SIZE) {
214 printf("read_nand_cached: error reading nand off %#x size %d bytes\n",
215 nand_cache_off, NAND_CACHE_SIZE);
219 retlen = NAND_CACHE_SIZE;
220 if (nand_read(&nand_info[id->num], nand_cache_off,
221 &retlen, nand_cache) != 0 ||
222 retlen != NAND_CACHE_SIZE) {
223 printf("read_nand_cached: error reading nand off %#x size %d bytes\n",
224 nand_cache_off, NAND_CACHE_SIZE);
229 cpy_bytes = nand_cache_off + NAND_CACHE_SIZE - (off + bytes_read);
230 if (cpy_bytes > size - bytes_read)
231 cpy_bytes = size - bytes_read;
232 memcpy(buf + bytes_read,
233 nand_cache + off + bytes_read - nand_cache_off,
235 bytes_read += cpy_bytes;
240 static void *get_fl_mem_nand(u32 off, u32 size, void *ext_buf)
242 u_char *buf = ext_buf ? (u_char*)ext_buf : (u_char*)malloc(size);
245 printf("get_fl_mem_nand: can't alloc %d bytes\n", size);
248 if (read_nand_cached(off, size, buf) < 0) {
257 static void *get_node_mem_nand(u32 off)
259 struct jffs2_unknown_node node;
262 if (NULL == get_fl_mem_nand(off, sizeof(node), &node))
265 if (!(ret = get_fl_mem_nand(off, node.magic ==
266 JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
268 printf("off = %#x magic %#x type %#x node.totlen = %d\n",
269 off, node.magic, node.nodetype, node.totlen);
274 static void put_fl_mem_nand(void *buf)
281 #if defined(CONFIG_CMD_FLASH)
283 * Support for jffs2 on top of NOR-flash
285 * NOR flash memory is mapped in processor's address space,
286 * just return address.
288 static inline void *get_fl_mem_nor(u32 off)
291 struct mtdids *id = current_part->dev->id;
293 extern flash_info_t flash_info[];
294 flash_info_t *flash = &flash_info[id->num];
296 addr += flash->start[0];
300 static inline void *get_node_mem_nor(u32 off)
302 return (void*)get_fl_mem_nor(off);
308 * Generic jffs2 raw memory and node read routines.
311 static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf)
313 struct mtdids *id = current_part->dev->id;
315 #if defined(CONFIG_CMD_FLASH)
316 if (id->type == MTD_DEV_TYPE_NOR)
317 return get_fl_mem_nor(off);
320 #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
321 if (id->type == MTD_DEV_TYPE_NAND)
322 return get_fl_mem_nand(off, size, ext_buf);
325 printf("get_fl_mem: unknown device type, using raw offset!\n");
329 static inline void *get_node_mem(u32 off)
331 struct mtdids *id = current_part->dev->id;
333 #if defined(CONFIG_CMD_FLASH)
334 if (id->type == MTD_DEV_TYPE_NOR)
335 return get_node_mem_nor(off);
338 #if defined(CONFIG_JFFS2_NAND) && \
339 defined(CONFIG_CMD_NAND)
340 if (id->type == MTD_DEV_TYPE_NAND)
341 return get_node_mem_nand(off);
344 printf("get_node_mem: unknown device type, using raw offset!\n");
348 static inline void put_fl_mem(void *buf)
350 #if defined(CONFIG_JFFS2_NAND) && \
351 defined(CONFIG_CMD_NAND)
352 struct mtdids *id = current_part->dev->id;
354 if (id->type == MTD_DEV_TYPE_NAND)
355 return put_fl_mem_nand(buf);
359 /* Compression names */
360 static char *compr_names[] = {
368 #if defined(CONFIG_JFFS2_LZO_LZARI)
375 static char spinner[] = { '|', '/', '-', '\\' };
377 /* Memory management */
380 struct mem_block *next;
381 struct b_node nodes[NODE_CHUNK];
386 free_nodes(struct b_list *list)
388 while (list->listMemBase != NULL) {
389 struct mem_block *next = list->listMemBase->next;
390 free( list->listMemBase );
391 list->listMemBase = next;
395 static struct b_node *
396 add_node(struct b_list *list)
399 struct mem_block *memBase;
402 memBase = list->listMemBase;
404 index = memBase->index;
406 putLabeledWord("add_node: index = ", index);
407 putLabeledWord("add_node: memBase = ", list->listMemBase);
410 if (memBase == NULL || index >= NODE_CHUNK) {
411 /* we need more space before we continue */
412 memBase = mmalloc(sizeof(struct mem_block));
413 if (memBase == NULL) {
414 putstr("add_node: malloc failed\n");
417 memBase->next = list->listMemBase;
420 putLabeledWord("add_node: alloced a new membase at ", *memBase);
424 /* now we have room to add it. */
425 b = &memBase->nodes[index];
428 memBase->index = index;
429 list->listMemBase = memBase;
434 static struct b_node *
435 insert_node(struct b_list *list, u32 offset)
438 #ifdef CFG_JFFS2_SORT_FRAGMENTS
439 struct b_node *b, *prev;
442 if (!(new = add_node(list))) {
443 putstr("add_node failed!\r\n");
446 new->offset = offset;
448 #ifdef CFG_JFFS2_SORT_FRAGMENTS
449 if (list->listTail != NULL && list->listCompare(new, list->listTail))
450 prev = list->listTail;
451 else if (list->listLast != NULL && list->listCompare(new, list->listLast))
452 prev = list->listLast;
456 for (b = (prev ? prev->next : list->listHead);
457 b != NULL && list->listCompare(new, b);
458 prev = b, b = b->next) {
462 list->listLast = prev;
469 list->listHead = new;
473 new->next = (struct b_node *) NULL;
474 if (list->listTail != NULL) {
475 list->listTail->next = new;
476 list->listTail = new;
478 list->listTail = list->listHead = new;
485 #ifdef CFG_JFFS2_SORT_FRAGMENTS
486 /* Sort data entries with the latest version last, so that if there
487 * is overlapping data the latest version will be used.
489 static int compare_inodes(struct b_node *new, struct b_node *old)
491 struct jffs2_raw_inode ojNew;
492 struct jffs2_raw_inode ojOld;
493 struct jffs2_raw_inode *jNew =
494 (struct jffs2_raw_inode *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew);
495 struct jffs2_raw_inode *jOld =
496 (struct jffs2_raw_inode *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld);
498 return jNew->version > jOld->version;
501 /* Sort directory entries so all entries in the same directory
502 * with the same name are grouped together, with the latest version
503 * last. This makes it easy to eliminate all but the latest version
504 * by marking the previous version dead by setting the inode to 0.
506 static int compare_dirents(struct b_node *new, struct b_node *old)
508 struct jffs2_raw_dirent ojNew;
509 struct jffs2_raw_dirent ojOld;
510 struct jffs2_raw_dirent *jNew =
511 (struct jffs2_raw_dirent *)get_fl_mem(new->offset, sizeof(ojNew), &ojNew);
512 struct jffs2_raw_dirent *jOld =
513 (struct jffs2_raw_dirent *)get_fl_mem(old->offset, sizeof(ojOld), &ojOld);
516 /* ascending sort by pino */
517 if (jNew->pino != jOld->pino)
518 return jNew->pino > jOld->pino;
520 /* pino is the same, so use ascending sort by nsize, so
521 * we don't do strncmp unless we really must.
523 if (jNew->nsize != jOld->nsize)
524 return jNew->nsize > jOld->nsize;
526 /* length is also the same, so use ascending sort by name
528 cmp = strncmp((char *)jNew->name, (char *)jOld->name, jNew->nsize);
532 /* we have duplicate names in this directory, so use ascending
535 if (jNew->version > jOld->version) {
536 /* since jNew is newer, we know jOld is not valid, so
537 * mark it with inode 0 and it will not be used
548 jffs2_scan_empty(u32 start_offset, struct part_info *part)
550 char *max = (char *)(part->offset + part->size - sizeof(struct jffs2_raw_inode));
551 char *offset = (char *)(part->offset + start_offset);
554 while (offset < max &&
555 *(u32*)get_fl_mem((u32)offset, sizeof(u32), &off) == 0xFFFFFFFF) {
556 offset += sizeof(u32);
557 /* return if spinning is due */
558 if (((u32)offset & ((1 << SPIN_BLKSIZE)-1)) == 0) break;
561 return (u32)offset - part->offset;
565 jffs2_free_cache(struct part_info *part)
569 if (part->jffs2_priv != NULL) {
570 pL = (struct b_lists *)part->jffs2_priv;
571 free_nodes(&pL->frag);
572 free_nodes(&pL->dir);
578 jffs_init_1pass_list(struct part_info *part)
582 jffs2_free_cache(part);
584 if (NULL != (part->jffs2_priv = malloc(sizeof(struct b_lists)))) {
585 pL = (struct b_lists *)part->jffs2_priv;
587 memset(pL, 0, sizeof(*pL));
588 #ifdef CFG_JFFS2_SORT_FRAGMENTS
589 pL->dir.listCompare = compare_dirents;
590 pL->frag.listCompare = compare_inodes;
596 /* find the inode from the slashless name given a parent */
598 jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
601 struct jffs2_raw_inode *jNode;
603 u32 latestVersion = 0;
609 #ifdef CFG_JFFS2_SORT_FRAGMENTS
610 /* Find file size before loading any data, so fragments that
611 * start past the end of file can be ignored. A fragment
612 * that is partially in the file is loaded, so extra data may
613 * be loaded up to the next 4K boundary above the file size.
614 * This shouldn't cause trouble when loading kernel images, so
615 * we will live with it.
617 for (b = pL->frag.listHead; b != NULL; b = b->next) {
618 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
619 sizeof(struct jffs2_raw_inode), NULL);
620 if ((inode == jNode->ino)) {
621 /* get actual file length from the newest node */
622 if (jNode->version >= latestVersion) {
623 totalSize = jNode->isize;
624 latestVersion = jNode->version;
631 for (b = pL->frag.listHead; b != NULL; b = b->next) {
632 jNode = (struct jffs2_raw_inode *) get_node_mem(b->offset);
633 if ((inode == jNode->ino)) {
635 putLabeledWord("\r\n\r\nread_inode: totlen = ", jNode->totlen);
636 putLabeledWord("read_inode: inode = ", jNode->ino);
637 putLabeledWord("read_inode: version = ", jNode->version);
638 putLabeledWord("read_inode: isize = ", jNode->isize);
639 putLabeledWord("read_inode: offset = ", jNode->offset);
640 putLabeledWord("read_inode: csize = ", jNode->csize);
641 putLabeledWord("read_inode: dsize = ", jNode->dsize);
642 putLabeledWord("read_inode: compr = ", jNode->compr);
643 putLabeledWord("read_inode: usercompr = ", jNode->usercompr);
644 putLabeledWord("read_inode: flags = ", jNode->flags);
647 #ifndef CFG_JFFS2_SORT_FRAGMENTS
648 /* get actual file length from the newest node */
649 if (jNode->version >= latestVersion) {
650 totalSize = jNode->isize;
651 latestVersion = jNode->version;
656 src = ((uchar *) jNode) + sizeof(struct jffs2_raw_inode);
657 /* ignore data behind latest known EOF */
658 if (jNode->offset > totalSize) {
663 lDest = (uchar *) (dest + jNode->offset);
665 putLabeledWord("read_inode: src = ", src);
666 putLabeledWord("read_inode: dest = ", lDest);
668 switch (jNode->compr) {
669 case JFFS2_COMPR_NONE:
670 ret = (unsigned long) ldr_memcpy(lDest, src, jNode->dsize);
672 case JFFS2_COMPR_ZERO:
674 for (i = 0; i < jNode->dsize; i++)
677 case JFFS2_COMPR_RTIME:
679 rtime_decompress(src, lDest, jNode->csize, jNode->dsize);
681 case JFFS2_COMPR_DYNRUBIN:
682 /* this is slow but it works */
684 dynrubin_decompress(src, lDest, jNode->csize, jNode->dsize);
686 case JFFS2_COMPR_ZLIB:
687 ret = zlib_decompress(src, lDest, jNode->csize, jNode->dsize);
689 #if defined(CONFIG_JFFS2_LZO_LZARI)
690 case JFFS2_COMPR_LZO:
691 ret = lzo_decompress(src, lDest, jNode->csize, jNode->dsize);
693 case JFFS2_COMPR_LZARI:
694 ret = lzari_decompress(src, lDest, jNode->csize, jNode->dsize);
699 putLabeledWord("UNKOWN COMPRESSION METHOD = ", jNode->compr);
707 putLabeledWord("read_inode: totalSize = ", totalSize);
708 putLabeledWord("read_inode: compr ret = ", ret);
716 putLabeledWord("read_inode: returning = ", totalSize);
721 /* find the inode from the slashless name given a parent */
723 jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino)
726 struct jffs2_raw_dirent *jDir;
732 /* name is assumed slash free */
736 /* we need to search all and return the inode with the highest version */
737 for(b = pL->dir.listHead; b; b = b->next, counter++) {
738 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset);
739 if ((pino == jDir->pino) && (len == jDir->nsize) &&
740 (jDir->ino) && /* 0 for unlink */
741 (!strncmp((char *)jDir->name, name, len))) { /* a match */
742 if (jDir->version < version) {
747 if (jDir->version == version && inode != 0) {
748 /* I'm pretty sure this isn't legal */
749 putstr(" ** ERROR ** ");
750 putnstr(jDir->name, jDir->nsize);
751 putLabeledWord(" has dup version =", version);
754 version = jDir->version;
757 putstr("\r\nfind_inode:p&l ->");
758 putnstr(jDir->name, jDir->nsize);
760 putLabeledWord("pino = ", jDir->pino);
761 putLabeledWord("nsize = ", jDir->nsize);
762 putLabeledWord("b = ", (u32) b);
763 putLabeledWord("counter = ", counter);
770 char *mkmodestr(unsigned long mode, char *str)
772 static const char *l = "xwr";
776 switch (mode & S_IFMT) {
777 case S_IFDIR: str[0] = 'd'; break;
778 case S_IFBLK: str[0] = 'b'; break;
779 case S_IFCHR: str[0] = 'c'; break;
780 case S_IFIFO: str[0] = 'f'; break;
781 case S_IFLNK: str[0] = 'l'; break;
782 case S_IFSOCK: str[0] = 's'; break;
783 case S_IFREG: str[0] = '-'; break;
784 default: str[0] = '?';
787 for(i = 0; i < 9; i++) {
789 str[9-i] = (mode & mask)?c:'-';
793 if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
794 if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
795 if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
800 static inline void dump_stat(struct stat *st, const char *name)
805 if (st->st_mtime == (time_t)(-1)) /* some ctimes really hate -1 */
808 ctime_r((time_t *)&st->st_mtime, s/*,64*/); /* newlib ctime doesn't have buflen */
810 if ((p = strchr(s,'\n')) != NULL) *p = '\0';
811 if ((p = strchr(s,'\r')) != NULL) *p = '\0';
814 printf("%6lo %s %8ld %s %s\n", st->st_mode, mkmodestr(st->st_mode, str),
815 st->st_size, s, name);
818 printf(" %s %8ld %s %s", mkmodestr(st->st_mode,str), st->st_size, s, name);
821 static inline u32 dump_inode(struct b_lists * pL, struct jffs2_raw_dirent *d, struct jffs2_raw_inode *i)
826 if(!d || !i) return -1;
828 strncpy(fname, (char *)d->name, d->nsize);
829 fname[d->nsize] = '\0';
831 memset(&st,0,sizeof(st));
833 st.st_mtime = i->mtime;
834 st.st_mode = i->mode;
837 /* neither dsize nor isize help us.. do it the long way */
838 st.st_size = jffs2_1pass_read_inode(pL, i->ino, NULL);
840 dump_stat(&st, fname);
842 if (d->type == DT_LNK) {
843 unsigned char *src = (unsigned char *) (&i[1]);
845 putnstr(src, (int)i->dsize);
853 /* list inodes with the given pino */
855 jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino)
858 struct jffs2_raw_dirent *jDir;
860 for (b = pL->dir.listHead; b; b = b->next) {
861 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset);
862 if ((pino == jDir->pino) && (jDir->ino)) { /* ino=0 -> unlink */
864 struct jffs2_raw_inode ojNode;
865 struct jffs2_raw_inode *jNode, *i = NULL;
866 struct b_node *b2 = pL->frag.listHead;
869 jNode = (struct jffs2_raw_inode *)
870 get_fl_mem(b2->offset, sizeof(ojNode), &ojNode);
871 if (jNode->ino == jDir->ino && jNode->version >= i_version) {
875 if (jDir->type == DT_LNK)
876 i = get_node_mem(b2->offset);
878 i = get_fl_mem(b2->offset, sizeof(*i), NULL);
883 dump_inode(pL, jDir, i);
892 jffs2_1pass_search_inode(struct b_lists * pL, const char *fname, u32 pino)
896 char working_tmp[256];
899 /* discard any leading slash */
901 while (fname[i] == '/')
903 strcpy(tmp, &fname[i]);
905 while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
907 strncpy(working_tmp, tmp, c - tmp);
908 working_tmp[c - tmp] = '\0';
910 putstr("search_inode: tmp = ");
913 putstr("search_inode: wtmp = ");
916 putstr("search_inode: c = ");
920 for (i = 0; i < strlen(c) - 1; i++)
924 putstr("search_inode: post tmp = ");
929 if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino))) {
930 putstr("find_inode failed for name=");
936 /* this is for the bare filename, directories have already been mapped */
937 if (!(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
938 putstr("find_inode failed for name=");
948 jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
952 struct jffs2_raw_dirent *jDir;
953 struct jffs2_raw_inode *jNode;
954 u8 jDirFoundType = 0;
955 u32 jDirFoundIno = 0;
956 u32 jDirFoundPino = 0;
962 /* we need to search all and return the inode with the highest version */
963 for(b = pL->dir.listHead; b; b = b->next) {
964 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset);
965 if (ino == jDir->ino) {
966 if (jDir->version < version) {
971 if (jDir->version == version && jDirFoundType) {
972 /* I'm pretty sure this isn't legal */
973 putstr(" ** ERROR ** ");
974 putnstr(jDir->name, jDir->nsize);
975 putLabeledWord(" has dup version (resolve) = ",
979 jDirFoundType = jDir->type;
980 jDirFoundIno = jDir->ino;
981 jDirFoundPino = jDir->pino;
982 version = jDir->version;
986 /* now we found the right entry again. (shoulda returned inode*) */
987 if (jDirFoundType != DT_LNK)
990 /* it's a soft link so we follow it again. */
991 b2 = pL->frag.listHead;
993 jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset);
994 if (jNode->ino == jDirFoundIno) {
995 src = (unsigned char *)jNode + sizeof(struct jffs2_raw_inode);
998 putLabeledWord("\t\t dsize = ", jNode->dsize);
999 putstr("\t\t target = ");
1000 putnstr(src, jNode->dsize);
1003 strncpy(tmp, (char *)src, jNode->dsize);
1004 tmp[jNode->dsize] = '\0';
1011 /* ok so the name of the new file to find is in tmp */
1012 /* if it starts with a slash it is root based else shared dirs */
1016 pino = jDirFoundPino;
1018 return jffs2_1pass_search_inode(pL, tmp, pino);
1022 jffs2_1pass_search_list_inodes(struct b_lists * pL, const char *fname, u32 pino)
1026 char working_tmp[256];
1029 /* discard any leading slash */
1031 while (fname[i] == '/')
1033 strcpy(tmp, &fname[i]);
1034 working_tmp[0] = '\0';
1035 while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
1037 strncpy(working_tmp, tmp, c - tmp);
1038 working_tmp[c - tmp] = '\0';
1039 for (i = 0; i < strlen(c) - 1; i++)
1042 /* only a failure if we arent looking at top level */
1043 if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino)) &&
1045 putstr("find_inode failed for name=");
1046 putstr(working_tmp);
1052 if (tmp[0] && !(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
1053 putstr("find_inode failed for name=");
1058 /* this is for the bare filename, directories have already been mapped */
1059 if (!(pino = jffs2_1pass_list_inodes(pL, pino))) {
1060 putstr("find_inode failed for name=");
1070 jffs2_1pass_rescan_needed(struct part_info *part)
1073 struct jffs2_unknown_node onode;
1074 struct jffs2_unknown_node *node;
1075 struct b_lists *pL = (struct b_lists *)part->jffs2_priv;
1077 if (part->jffs2_priv == 0){
1078 DEBUGF ("rescan: First time in use\n");
1082 /* if we have no list, we need to rescan */
1083 if (pL->frag.listCount == 0) {
1084 DEBUGF ("rescan: fraglist zero\n");
1088 /* but suppose someone reflashed a partition at the same offset... */
1089 b = pL->dir.listHead;
1091 node = (struct jffs2_unknown_node *) get_fl_mem(b->offset,
1092 sizeof(onode), &onode);
1093 if (node->nodetype != JFFS2_NODETYPE_DIRENT) {
1094 DEBUGF ("rescan: fs changed beneath me? (%lx)\n",
1095 (unsigned long) b->offset);
1103 #ifdef DEBUG_FRAGMENTS
1105 dump_fragments(struct b_lists *pL)
1108 struct jffs2_raw_inode ojNode;
1109 struct jffs2_raw_inode *jNode;
1111 putstr("\r\n\r\n******The fragment Entries******\r\n");
1112 b = pL->frag.listHead;
1114 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
1115 sizeof(ojNode), &ojNode);
1116 putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset);
1117 putLabeledWord("\tbuild_list: totlen = ", jNode->totlen);
1118 putLabeledWord("\tbuild_list: inode = ", jNode->ino);
1119 putLabeledWord("\tbuild_list: version = ", jNode->version);
1120 putLabeledWord("\tbuild_list: isize = ", jNode->isize);
1121 putLabeledWord("\tbuild_list: atime = ", jNode->atime);
1122 putLabeledWord("\tbuild_list: offset = ", jNode->offset);
1123 putLabeledWord("\tbuild_list: csize = ", jNode->csize);
1124 putLabeledWord("\tbuild_list: dsize = ", jNode->dsize);
1125 putLabeledWord("\tbuild_list: compr = ", jNode->compr);
1126 putLabeledWord("\tbuild_list: usercompr = ", jNode->usercompr);
1127 putLabeledWord("\tbuild_list: flags = ", jNode->flags);
1128 putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */
1134 #ifdef DEBUG_DIRENTS
1136 dump_dirents(struct b_lists *pL)
1139 struct jffs2_raw_dirent *jDir;
1141 putstr("\r\n\r\n******The directory Entries******\r\n");
1142 b = pL->dir.listHead;
1144 jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset);
1146 putnstr(jDir->name, jDir->nsize);
1147 putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
1148 putLabeledWord("\tbuild_list: nodetype = ", jDir->nodetype);
1149 putLabeledWord("\tbuild_list: hdr_crc = ", jDir->hdr_crc);
1150 putLabeledWord("\tbuild_list: pino = ", jDir->pino);
1151 putLabeledWord("\tbuild_list: version = ", jDir->version);
1152 putLabeledWord("\tbuild_list: ino = ", jDir->ino);
1153 putLabeledWord("\tbuild_list: mctime = ", jDir->mctime);
1154 putLabeledWord("\tbuild_list: nsize = ", jDir->nsize);
1155 putLabeledWord("\tbuild_list: type = ", jDir->type);
1156 putLabeledWord("\tbuild_list: node_crc = ", jDir->node_crc);
1157 putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc);
1158 putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */
1166 jffs2_1pass_build_lists(struct part_info * part)
1169 struct jffs2_unknown_node *node;
1170 u32 offset, oldoffset = 0;
1171 u32 max = part->size - sizeof(struct jffs2_raw_inode);
1177 /* turn off the lcd. Refreshing the lcd adds 50% overhead to the */
1178 /* jffs2 list building enterprise nope. in newer versions the overhead is */
1179 /* only about 5 %. not enough to inconvenience people for. */
1182 /* if we are building a list we need to refresh the cache. */
1183 jffs_init_1pass_list(part);
1184 pL = (struct b_lists *)part->jffs2_priv;
1186 puts ("Scanning JFFS2 FS: ");
1188 /* start at the beginning of the partition */
1189 while (offset < max) {
1190 if ((oldoffset >> SPIN_BLKSIZE) != (offset >> SPIN_BLKSIZE)) {
1191 printf("\b\b%c ", spinner[counter++ % sizeof(spinner)]);
1195 node = (struct jffs2_unknown_node *) get_node_mem((u32)part->offset + offset);
1196 if (node->magic == JFFS2_MAGIC_BITMASK && hdr_crc(node)) {
1197 /* if its a fragment add it */
1198 if (node->nodetype == JFFS2_NODETYPE_INODE &&
1199 inode_crc((struct jffs2_raw_inode *) node) &&
1200 data_crc((struct jffs2_raw_inode *) node)) {
1201 if (insert_node(&pL->frag, (u32) part->offset +
1206 } else if (node->nodetype == JFFS2_NODETYPE_DIRENT &&
1207 dirent_crc((struct jffs2_raw_dirent *) node) &&
1208 dirent_name_crc((struct jffs2_raw_dirent *) node)) {
1209 if (! (counterN%100))
1211 if (insert_node(&pL->dir, (u32) part->offset +
1217 } else if (node->nodetype == JFFS2_NODETYPE_CLEANMARKER) {
1218 if (node->totlen != sizeof(struct jffs2_unknown_node))
1219 printf("OOPS Cleanmarker has bad size "
1220 "%d != %d\n", node->totlen,
1221 sizeof(struct jffs2_unknown_node));
1222 } else if (node->nodetype == JFFS2_NODETYPE_PADDING) {
1223 if (node->totlen < sizeof(struct jffs2_unknown_node))
1224 printf("OOPS Padding has bad size "
1225 "%d < %d\n", node->totlen,
1226 sizeof(struct jffs2_unknown_node));
1228 printf("Unknown node type: %x len %d "
1229 "offset 0x%x\n", node->nodetype,
1230 node->totlen, offset);
1232 offset += ((node->totlen + 3) & ~3);
1234 } else if (node->magic == JFFS2_EMPTY_BITMASK &&
1235 node->nodetype == JFFS2_EMPTY_BITMASK) {
1236 offset = jffs2_scan_empty(offset, part);
1237 } else { /* if we know nothing, we just step and look. */
1241 /* printf("unknown node magic %4.4x %4.4x @ %lx\n", node->magic, node->nodetype, (unsigned long)node); */
1245 putstr("\b\b done.\r\n"); /* close off the dots */
1246 /* turn the lcd back on. */
1250 putLabeledWord("dir entries = ", pL->dir.listCount);
1251 putLabeledWord("frag entries = ", pL->frag.listCount);
1252 putLabeledWord("+4 increments = ", counter4);
1253 putLabeledWord("+file_offset increments = ", counterF);
1257 #ifdef DEBUG_DIRENTS
1261 #ifdef DEBUG_FRAGMENTS
1265 /* give visual feedback that we are done scanning the flash */
1266 led_blink(0x0, 0x0, 0x1, 0x1); /* off, forever, on 100ms, off 100ms */
1272 jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL)
1275 struct jffs2_raw_inode ojNode;
1276 struct jffs2_raw_inode *jNode;
1279 for (i = 0; i < JFFS2_NUM_COMPR; i++) {
1280 piL->compr_info[i].num_frags = 0;
1281 piL->compr_info[i].compr_sum = 0;
1282 piL->compr_info[i].decompr_sum = 0;
1285 b = pL->frag.listHead;
1287 jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
1288 sizeof(ojNode), &ojNode);
1289 if (jNode->compr < JFFS2_NUM_COMPR) {
1290 piL->compr_info[jNode->compr].num_frags++;
1291 piL->compr_info[jNode->compr].compr_sum += jNode->csize;
1292 piL->compr_info[jNode->compr].decompr_sum += jNode->dsize;
1300 static struct b_lists *
1301 jffs2_get_list(struct part_info * part, const char *who)
1303 /* copy requested part_info struct pointer to global location */
1304 current_part = part;
1306 if (jffs2_1pass_rescan_needed(part)) {
1307 if (!jffs2_1pass_build_lists(part)) {
1308 printf("%s: Failed to scan JFFSv2 file structure\n", who);
1312 return (struct b_lists *)part->jffs2_priv;
1316 /* Print directory / file contents */
1318 jffs2_1pass_ls(struct part_info * part, const char *fname)
1324 if (! (pl = jffs2_get_list(part, "ls")))
1327 if (! (inode = jffs2_1pass_search_list_inodes(pl, fname, 1))) {
1328 putstr("ls: Failed to scan jffs2 file structure\r\n");
1334 putLabeledWord("found file at inode = ", inode);
1335 putLabeledWord("read_inode returns = ", ret);
1342 /* Load a file from flash into memory. fname can be a full path */
1344 jffs2_1pass_load(char *dest, struct part_info * part, const char *fname)
1351 if (! (pl = jffs2_get_list(part, "load")))
1354 if (! (inode = jffs2_1pass_search_inode(pl, fname, 1))) {
1355 putstr("load: Failed to find inode\r\n");
1359 /* Resolve symlinks */
1360 if (! (inode = jffs2_1pass_resolve_inode(pl, inode))) {
1361 putstr("load: Failed to resolve inode structure\r\n");
1365 if ((ret = jffs2_1pass_read_inode(pl, inode, dest)) < 0) {
1366 putstr("load: Failed to read inode\r\n");
1370 DEBUGF ("load: loaded '%s' to 0x%lx (%ld bytes)\n", fname,
1371 (unsigned long) dest, ret);
1375 /* Return information about the fs on this partition */
1377 jffs2_1pass_info(struct part_info * part)
1379 struct b_jffs2_info info;
1383 if (! (pl = jffs2_get_list(part, "info")))
1386 jffs2_1pass_fill_info(pl, &info);
1387 for (i = 0; i < JFFS2_NUM_COMPR; i++) {
1388 printf ("Compression: %s\n"
1389 "\tfrag count: %d\n"
1390 "\tcompressed sum: %d\n"
1391 "\tuncompressed sum: %d\n",
1393 info.compr_info[i].num_frags,
1394 info.compr_info[i].compr_sum,
1395 info.compr_info[i].decompr_sum);