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Jetpack/u-boot/fs/jffs2/jffs2_1pass.c

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/*
-------------------------------------------------------------------------
* Filename: jffs2.c
* Version: $Id: jffs2_1pass.c,v 1.7 2002/01/25 01:56:47 nyet Exp $
* Copyright: Copyright (C) 2001, Russ Dill
* Author: Russ Dill <Russ.Dill@asu.edu>
* Description: Module to load kernel from jffs2
*-----------------------------------------------------------------------*/
/*
* some portions of this code are taken from jffs2, and as such, the
* following copyright notice is included.
*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2001 Red Hat, Inc.
*
* Created by David Woodhouse <dwmw2@cambridge.redhat.com>
*
* The original JFFS, from which the design for JFFS2 was derived,
* was designed and implemented by Axis Communications AB.
*
* The contents of this file are subject to the Red Hat eCos Public
* License Version 1.1 (the "Licence"); you may not use this file
* except in compliance with the Licence. You may obtain a copy of
* the Licence at http://www.redhat.com/
*
* Software distributed under the Licence is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the Licence for the specific language governing rights and
* limitations under the Licence.
*
* The Original Code is JFFS2 - Journalling Flash File System, version 2
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License version 2 (the "GPL"), in
* which case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the RHEPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file
* under either the RHEPL or the GPL.
*
* $Id: jffs2_1pass.c,v 1.7 2002/01/25 01:56:47 nyet Exp $
*
*/
/* Ok, so anyone who knows the jffs2 code will probably want to get a papar
* bag to throw up into before reading this code. I looked through the jffs2
* code, the caching scheme is very elegant. I tried to keep the version
* for a bootloader as small and simple as possible. Instead of worring about
* unneccesary data copies, node scans, etc, I just optimized for the known
* common case, a kernel, which looks like:
* (1) most pages are 4096 bytes
* (2) version numbers are somewhat sorted in acsending order
* (3) multiple compressed blocks making up one page is uncommon
*
* So I create a linked list of decending version numbers (insertions at the
* head), and then for each page, walk down the list, until a matching page
* with 4096 bytes is found, and then decompress the watching pages in
* reverse order.
*
*/
/*
* Adapted by Nye Liu <nyet@zumanetworks.com> and
* Rex Feany <rfeany@zumanetworks.com>
* on Jan/2002 for U-Boot.
*
* Clipped out all the non-1pass functions, cleaned up warnings,
* wrappers, etc. No major changes to the code.
* Please, he really means it when he said have a paper bag
* handy. We needed it ;).
*
*/
/*
* Bugfixing by Kai-Uwe Bloem <kai-uwe.bloem@auerswald.de>, (C) Mar/2003
*
* - overhaul of the memory management. Removed much of the "paper-bagging"
* in that part of the code, fixed several bugs, now frees memory when
* partition is changed.
* It's still ugly :-(
* - fixed a bug in jffs2_1pass_read_inode where the file length calculation
* was incorrect. Removed a bit of the paper-bagging as well.
* - removed double crc calculation for fragment headers in jffs2_private.h
* for speedup.
* - scan_empty rewritten in a more "standard" manner (non-paperbag, that is).
* - spinning wheel now spins depending on how much memory has been scanned
* - lots of small changes all over the place to "improve" readability.
* - implemented fragment sorting to ensure that the newest data is copied
* if there are multiple copies of fragments for a certain file offset.
*
* The fragment sorting feature must be enabled by CONFIG_SYS_JFFS2_SORT_FRAGMENTS.
* Sorting is done while adding fragments to the lists, which is more or less a
* bubble sort. This takes a lot of time, and is most probably not an issue if
* the boot filesystem is always mounted readonly.
*
* You should define it if the boot filesystem is mounted writable, and updates
* to the boot files are done by copying files to that filesystem.
*
*
* There's a big issue left: endianess is completely ignored in this code. Duh!
*
*
* You still should have paper bags at hand :-(. The code lacks more or less
* any comment, and is still arcane and difficult to read in places. As this
* might be incompatible with any new code from the jffs2 maintainers anyway,
* it should probably be dumped and replaced by something like jffs2reader!
*/
#include <common.h>
#include <config.h>
#include <malloc.h>
#include <div64.h>
#include <linux/compiler.h>
#include <linux/stat.h>
#include <linux/time.h>
#include <watchdog.h>
#include <jffs2/jffs2.h>
#include <jffs2/jffs2_1pass.h>
#include <linux/compat.h>
#include <asm/errno.h>
#include "jffs2_private.h"
#define NODE_CHUNK 1024 /* size of memory allocation chunk in b_nodes */
#define SPIN_BLKSIZE 18 /* spin after having scanned 1<<BLKSIZE bytes */
/* Debugging switches */
#undef DEBUG_DIRENTS /* print directory entry list after scan */
#undef DEBUG_FRAGMENTS /* print fragment list after scan */
#undef DEBUG /* enable debugging messages */
#ifdef DEBUG
# define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
# define DEBUGF(fmt,args...)
#endif
#include "summary.h"
/* keeps pointer to currentlu processed partition */
static struct part_info *current_part;
#if (defined(CONFIG_JFFS2_NAND) && \
defined(CONFIG_CMD_NAND) )
#include <nand.h>
/*
* Support for jffs2 on top of NAND-flash
*
* NAND memory isn't mapped in processor's address space,
* so data should be fetched from flash before
* being processed. This is exactly what functions declared
* here do.
*
*/
#define NAND_PAGE_SIZE 512
#define NAND_PAGE_SHIFT 9
#define NAND_PAGE_MASK (~(NAND_PAGE_SIZE-1))
#ifndef NAND_CACHE_PAGES
#define NAND_CACHE_PAGES 16
#endif
#define NAND_CACHE_SIZE (NAND_CACHE_PAGES*NAND_PAGE_SIZE)
static u8* nand_cache = NULL;
static u32 nand_cache_off = (u32)-1;
static int read_nand_cached(u32 off, u32 size, u_char *buf)
{
struct mtdids *id = current_part->dev->id;
u32 bytes_read = 0;
size_t retlen;
int cpy_bytes;
while (bytes_read < size) {
if ((off + bytes_read < nand_cache_off) ||
(off + bytes_read >= nand_cache_off+NAND_CACHE_SIZE)) {
nand_cache_off = (off + bytes_read) & NAND_PAGE_MASK;
if (!nand_cache) {
/* This memory never gets freed but 'cause
it's a bootloader, nobody cares */
nand_cache = malloc(NAND_CACHE_SIZE);
if (!nand_cache) {
printf("read_nand_cached: can't alloc cache size %d bytes\n",
NAND_CACHE_SIZE);
return -1;
}
}
retlen = NAND_CACHE_SIZE;
if (nand_read(nand_info[id->num], nand_cache_off,
&retlen, nand_cache) != 0 ||
retlen != NAND_CACHE_SIZE) {
printf("read_nand_cached: error reading nand off %#x size %d bytes\n",
nand_cache_off, NAND_CACHE_SIZE);
return -1;
}
}
cpy_bytes = nand_cache_off + NAND_CACHE_SIZE - (off + bytes_read);
if (cpy_bytes > size - bytes_read)
cpy_bytes = size - bytes_read;
memcpy(buf + bytes_read,
nand_cache + off + bytes_read - nand_cache_off,
cpy_bytes);
bytes_read += cpy_bytes;
}
return bytes_read;
}
static void *get_fl_mem_nand(u32 off, u32 size, void *ext_buf)
{
u_char *buf = ext_buf ? (u_char*)ext_buf : (u_char*)malloc(size);
if (NULL == buf) {
printf("get_fl_mem_nand: can't alloc %d bytes\n", size);
return NULL;
}
if (read_nand_cached(off, size, buf) < 0) {
if (!ext_buf)
free(buf);
return NULL;
}
return buf;
}
static void *get_node_mem_nand(u32 off, void *ext_buf)
{
struct jffs2_unknown_node node;
void *ret = NULL;
if (NULL == get_fl_mem_nand(off, sizeof(node), &node))
return NULL;
if (!(ret = get_fl_mem_nand(off, node.magic ==
JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
ext_buf))) {
printf("off = %#x magic %#x type %#x node.totlen = %d\n",
off, node.magic, node.nodetype, node.totlen);
}
return ret;
}
static void put_fl_mem_nand(void *buf)
{
free(buf);
}
#endif
#if defined(CONFIG_CMD_ONENAND)
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
#include <onenand_uboot.h>
#define ONENAND_PAGE_SIZE 2048
#define ONENAND_PAGE_SHIFT 11
#define ONENAND_PAGE_MASK (~(ONENAND_PAGE_SIZE-1))
#ifndef ONENAND_CACHE_PAGES
#define ONENAND_CACHE_PAGES 4
#endif
#define ONENAND_CACHE_SIZE (ONENAND_CACHE_PAGES*ONENAND_PAGE_SIZE)
static u8* onenand_cache;
static u32 onenand_cache_off = (u32)-1;
static int read_onenand_cached(u32 off, u32 size, u_char *buf)
{
u32 bytes_read = 0;
size_t retlen;
int cpy_bytes;
while (bytes_read < size) {
if ((off + bytes_read < onenand_cache_off) ||
(off + bytes_read >= onenand_cache_off + ONENAND_CACHE_SIZE)) {
onenand_cache_off = (off + bytes_read) & ONENAND_PAGE_MASK;
if (!onenand_cache) {
/* This memory never gets freed but 'cause
it's a bootloader, nobody cares */
onenand_cache = malloc(ONENAND_CACHE_SIZE);
if (!onenand_cache) {
printf("read_onenand_cached: can't alloc cache size %d bytes\n",
ONENAND_CACHE_SIZE);
return -1;
}
}
retlen = ONENAND_CACHE_SIZE;
if (onenand_read(&onenand_mtd, onenand_cache_off, retlen,
&retlen, onenand_cache) != 0 ||
retlen != ONENAND_CACHE_SIZE) {
printf("read_onenand_cached: error reading nand off %#x size %d bytes\n",
onenand_cache_off, ONENAND_CACHE_SIZE);
return -1;
}
}
cpy_bytes = onenand_cache_off + ONENAND_CACHE_SIZE - (off + bytes_read);
if (cpy_bytes > size - bytes_read)
cpy_bytes = size - bytes_read;
memcpy(buf + bytes_read,
onenand_cache + off + bytes_read - onenand_cache_off,
cpy_bytes);
bytes_read += cpy_bytes;
}
return bytes_read;
}
static void *get_fl_mem_onenand(u32 off, u32 size, void *ext_buf)
{
u_char *buf = ext_buf ? (u_char *)ext_buf : (u_char *)malloc(size);
if (NULL == buf) {
printf("get_fl_mem_onenand: can't alloc %d bytes\n", size);
return NULL;
}
if (read_onenand_cached(off, size, buf) < 0) {
if (!ext_buf)
free(buf);
return NULL;
}
return buf;
}
static void *get_node_mem_onenand(u32 off, void *ext_buf)
{
struct jffs2_unknown_node node;
void *ret = NULL;
if (NULL == get_fl_mem_onenand(off, sizeof(node), &node))
return NULL;
ret = get_fl_mem_onenand(off, node.magic ==
JFFS2_MAGIC_BITMASK ? node.totlen : sizeof(node),
ext_buf);
if (!ret) {
printf("off = %#x magic %#x type %#x node.totlen = %d\n",
off, node.magic, node.nodetype, node.totlen);
}
return ret;
}
static void put_fl_mem_onenand(void *buf)
{
free(buf);
}
#endif
#if defined(CONFIG_CMD_FLASH)
/*
* Support for jffs2 on top of NOR-flash
*
* NOR flash memory is mapped in processor's address space,
* just return address.
*/
static inline void *get_fl_mem_nor(u32 off, u32 size, void *ext_buf)
{
u32 addr = off;
struct mtdids *id = current_part->dev->id;
extern flash_info_t flash_info[];
flash_info_t *flash = &flash_info[id->num];
addr += flash->start[0];
if (ext_buf) {
memcpy(ext_buf, (void *)addr, size);
return ext_buf;
}
return (void*)addr;
}
static inline void *get_node_mem_nor(u32 off, void *ext_buf)
{
struct jffs2_unknown_node *pNode;
/* pNode will point directly to flash - don't provide external buffer
and don't care about size */
pNode = get_fl_mem_nor(off, 0, NULL);
return (void *)get_fl_mem_nor(off, pNode->magic == JFFS2_MAGIC_BITMASK ?
pNode->totlen : sizeof(*pNode), ext_buf);
}
#endif
/*
* Generic jffs2 raw memory and node read routines.
*
*/
static inline void *get_fl_mem(u32 off, u32 size, void *ext_buf)
{
struct mtdids *id = current_part->dev->id;
switch(id->type) {
#if defined(CONFIG_CMD_FLASH)
case MTD_DEV_TYPE_NOR:
return get_fl_mem_nor(off, size, ext_buf);
break;
#endif
#if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
case MTD_DEV_TYPE_NAND:
return get_fl_mem_nand(off, size, ext_buf);
break;
#endif
#if defined(CONFIG_CMD_ONENAND)
case MTD_DEV_TYPE_ONENAND:
return get_fl_mem_onenand(off, size, ext_buf);
break;
#endif
default:
printf("get_fl_mem: unknown device type, " \
"using raw offset!\n");
}
return (void*)off;
}
static inline void *get_node_mem(u32 off, void *ext_buf)
{
struct mtdids *id = current_part->dev->id;
switch(id->type) {
#if defined(CONFIG_CMD_FLASH)
case MTD_DEV_TYPE_NOR:
return get_node_mem_nor(off, ext_buf);
break;
#endif
#if defined(CONFIG_JFFS2_NAND) && \
defined(CONFIG_CMD_NAND)
case MTD_DEV_TYPE_NAND:
return get_node_mem_nand(off, ext_buf);
break;
#endif
#if defined(CONFIG_CMD_ONENAND)
case MTD_DEV_TYPE_ONENAND:
return get_node_mem_onenand(off, ext_buf);
break;
#endif
default:
printf("get_fl_mem: unknown device type, " \
"using raw offset!\n");
}
return (void*)off;
}
static inline void put_fl_mem(void *buf, void *ext_buf)
{
struct mtdids *id = current_part->dev->id;
/* If buf is the same as ext_buf, it was provided by the caller -
we shouldn't free it then. */
if (buf == ext_buf)
return;
switch (id->type) {
#if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
case MTD_DEV_TYPE_NAND:
return put_fl_mem_nand(buf);
#endif
#if defined(CONFIG_CMD_ONENAND)
case MTD_DEV_TYPE_ONENAND:
return put_fl_mem_onenand(buf);
#endif
}
}
/* Compression names */
static char *compr_names[] = {
"NONE",
"ZERO",
"RTIME",
"RUBINMIPS",
"COPY",
"DYNRUBIN",
"ZLIB",
#if defined(CONFIG_JFFS2_LZO)
"LZO",
#endif
};
/* Memory management */
struct mem_block {
u32 index;
struct mem_block *next;
struct b_node nodes[NODE_CHUNK];
};
static void
free_nodes(struct b_list *list)
{
while (list->listMemBase != NULL) {
struct mem_block *next = list->listMemBase->next;
free( list->listMemBase );
list->listMemBase = next;
}
}
static struct b_node *
add_node(struct b_list *list)
{
u32 index = 0;
struct mem_block *memBase;
struct b_node *b;
memBase = list->listMemBase;
if (memBase != NULL)
index = memBase->index;
#if 0
putLabeledWord("add_node: index = ", index);
putLabeledWord("add_node: memBase = ", list->listMemBase);
#endif
if (memBase == NULL || index >= NODE_CHUNK) {
/* we need more space before we continue */
memBase = mmalloc(sizeof(struct mem_block));
if (memBase == NULL) {
putstr("add_node: malloc failed\n");
return NULL;
}
memBase->next = list->listMemBase;
index = 0;
#if 0
putLabeledWord("add_node: alloced a new membase at ", *memBase);
#endif
}
/* now we have room to add it. */
b = &memBase->nodes[index];
index ++;
memBase->index = index;
list->listMemBase = memBase;
list->listCount++;
return b;
}
static struct b_node *
insert_node(struct b_list *list, u32 offset)
{
struct b_node *new;
if (!(new = add_node(list))) {
putstr("add_node failed!\r\n");
return NULL;
}
new->offset = offset;
new->next = NULL;
if (list->listTail != NULL)
list->listTail->next = new;
else
list->listHead = new;
list->listTail = new;
return new;
}
#ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
/* Sort data entries with the latest version last, so that if there
* is overlapping data the latest version will be used.
*/
static int compare_inodes(struct b_node *new, struct b_node *old)
{
/*
* Only read in the version info from flash, not the entire inode.
* This can make a big difference to speed if flash is slow.
*/
u32 new_version;
u32 old_version;
get_fl_mem(new->offset + offsetof(struct jffs2_raw_inode, version),
sizeof(new_version), &new_version);
get_fl_mem(old->offset + offsetof(struct jffs2_raw_inode, version),
sizeof(old_version), &old_version);
return new_version > old_version;
}
/* Sort directory entries so all entries in the same directory
* with the same name are grouped together, with the latest version
* last. This makes it easy to eliminate all but the latest version
* by marking the previous version dead by setting the inode to 0.
*/
static int compare_dirents(struct b_node *new, struct b_node *old)
{
/*
* Using NULL as the buffer for NOR flash prevents the entire node
* being read. This makes most comparisons much quicker as only one
* or two entries from the node will be used most of the time.
*/
struct jffs2_raw_dirent *jNew = get_node_mem(new->offset, NULL);
struct jffs2_raw_dirent *jOld = get_node_mem(old->offset, NULL);
int cmp;
int ret;
if (jNew->pino != jOld->pino) {
/* ascending sort by pino */
ret = jNew->pino > jOld->pino;
} else if (jNew->nsize != jOld->nsize) {
/*
* pino is the same, so use ascending sort by nsize,
* so we don't do strncmp unless we really must.
*/
ret = jNew->nsize > jOld->nsize;
} else {
/*
* length is also the same, so use ascending sort by name
*/
cmp = strncmp((char *)jNew->name, (char *)jOld->name,
jNew->nsize);
if (cmp != 0) {
ret = cmp > 0;
} else {
/*
* we have duplicate names in this directory,
* so use ascending sort by version
*/
ret = jNew->version > jOld->version;
}
}
put_fl_mem(jNew, NULL);
put_fl_mem(jOld, NULL);
return ret;
}
#endif
void
jffs2_free_cache(struct part_info *part)
{
struct b_lists *pL;
if (part->jffs2_priv != NULL) {
pL = (struct b_lists *)part->jffs2_priv;
free_nodes(&pL->frag);
free_nodes(&pL->dir);
free(pL->readbuf);
free(pL);
}
}
static u32
jffs_init_1pass_list(struct part_info *part)
{
struct b_lists *pL;
jffs2_free_cache(part);
if (NULL != (part->jffs2_priv = malloc(sizeof(struct b_lists)))) {
pL = (struct b_lists *)part->jffs2_priv;
memset(pL, 0, sizeof(*pL));
#ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
pL->dir.listCompare = compare_dirents;
pL->frag.listCompare = compare_inodes;
#endif
}
return 0;
}
/* find the inode from the slashless name given a parent */
static long
jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest)
{
struct b_node *b;
struct jffs2_raw_inode *jNode;
u32 totalSize = 0;
u32 latestVersion = 0;
uchar *lDest;
uchar *src;
int i;
u32 counter = 0;
#ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
/* Find file size before loading any data, so fragments that
* start past the end of file can be ignored. A fragment
* that is partially in the file is loaded, so extra data may
* be loaded up to the next 4K boundary above the file size.
* This shouldn't cause trouble when loading kernel images, so
* we will live with it.
*/
for (b = pL->frag.listHead; b != NULL; b = b->next) {
jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
sizeof(struct jffs2_raw_inode), pL->readbuf);
if ((inode == jNode->ino)) {
/* get actual file length from the newest node */
if (jNode->version >= latestVersion) {
totalSize = jNode->isize;
latestVersion = jNode->version;
}
}
put_fl_mem(jNode, pL->readbuf);
}
/*
* If no destination is provided, we are done.
* Just return the total size.
*/
if (!dest)
return totalSize;
#endif
for (b = pL->frag.listHead; b != NULL; b = b->next) {
/*
* Copy just the node and not the data at this point,
* since we don't yet know if we need this data.
*/
jNode = (struct jffs2_raw_inode *)get_fl_mem(b->offset,
sizeof(struct jffs2_raw_inode),
pL->readbuf);
if (inode == jNode->ino) {
#if 0
putLabeledWord("\r\n\r\nread_inode: totlen = ", jNode->totlen);
putLabeledWord("read_inode: inode = ", jNode->ino);
putLabeledWord("read_inode: version = ", jNode->version);
putLabeledWord("read_inode: isize = ", jNode->isize);
putLabeledWord("read_inode: offset = ", jNode->offset);
putLabeledWord("read_inode: csize = ", jNode->csize);
putLabeledWord("read_inode: dsize = ", jNode->dsize);
putLabeledWord("read_inode: compr = ", jNode->compr);
putLabeledWord("read_inode: usercompr = ", jNode->usercompr);
putLabeledWord("read_inode: flags = ", jNode->flags);
#endif
#ifndef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
/* get actual file length from the newest node */
if (jNode->version >= latestVersion) {
totalSize = jNode->isize;
latestVersion = jNode->version;
}
#endif
if(dest) {
/*
* Now that the inode has been checked,
* read the entire inode, including data.
*/
put_fl_mem(jNode, pL->readbuf);
jNode = (struct jffs2_raw_inode *)
get_node_mem(b->offset, pL->readbuf);
src = ((uchar *)jNode) +
sizeof(struct jffs2_raw_inode);
/* ignore data behind latest known EOF */
if (jNode->offset > totalSize) {
put_fl_mem(jNode, pL->readbuf);
continue;
}
if (b->datacrc == CRC_UNKNOWN)
b->datacrc = data_crc(jNode) ?
CRC_OK : CRC_BAD;
if (b->datacrc == CRC_BAD) {
put_fl_mem(jNode, pL->readbuf);
continue;
}
lDest = (uchar *) (dest + jNode->offset);
#if 0
putLabeledWord("read_inode: src = ", src);
putLabeledWord("read_inode: dest = ", lDest);
#endif
switch (jNode->compr) {
case JFFS2_COMPR_NONE:
ldr_memcpy(lDest, src, jNode->dsize);
break;
case JFFS2_COMPR_ZERO:
for (i = 0; i < jNode->dsize; i++)
*(lDest++) = 0;
break;
case JFFS2_COMPR_RTIME:
rtime_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
case JFFS2_COMPR_DYNRUBIN:
/* this is slow but it works */
dynrubin_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
case JFFS2_COMPR_ZLIB:
zlib_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
#if defined(CONFIG_JFFS2_LZO)
case JFFS2_COMPR_LZO:
lzo_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
#endif
default:
/* unknown */
putLabeledWord("UNKNOWN COMPRESSION METHOD = ", jNode->compr);
put_fl_mem(jNode, pL->readbuf);
return -1;
break;
}
}
#if 0
putLabeledWord("read_inode: totalSize = ", totalSize);
#endif
}
counter++;
put_fl_mem(jNode, pL->readbuf);
}
#if 0
putLabeledWord("read_inode: returning = ", totalSize);
#endif
return totalSize;
}
/* find the inode from the slashless name given a parent */
static u32
jffs2_1pass_find_inode(struct b_lists * pL, const char *name, u32 pino)
{
struct b_node *b;
struct jffs2_raw_dirent *jDir;
int len;
u32 counter;
u32 version = 0;
u32 inode = 0;
/* name is assumed slash free */
len = strlen(name);
counter = 0;
/* we need to search all and return the inode with the highest version */
for(b = pL->dir.listHead; b; b = b->next, counter++) {
jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
pL->readbuf);
if ((pino == jDir->pino) && (len == jDir->nsize) &&
(!strncmp((char *)jDir->name, name, len))) { /* a match */
if (jDir->version < version) {
put_fl_mem(jDir, pL->readbuf);
continue;
}
if (jDir->version == version && inode != 0) {
/* I'm pretty sure this isn't legal */
putstr(" ** ERROR ** ");
putnstr(jDir->name, jDir->nsize);
putLabeledWord(" has dup version =", version);
}
inode = jDir->ino;
version = jDir->version;
}
#if 0
putstr("\r\nfind_inode:p&l ->");
putnstr(jDir->name, jDir->nsize);
putstr("\r\n");
putLabeledWord("pino = ", jDir->pino);
putLabeledWord("nsize = ", jDir->nsize);
putLabeledWord("b = ", (u32) b);
putLabeledWord("counter = ", counter);
#endif
put_fl_mem(jDir, pL->readbuf);
}
return inode;
}
char *mkmodestr(unsigned long mode, char *str)
{
static const char *l = "xwr";
int mask = 1, i;
char c;
switch (mode & S_IFMT) {
case S_IFDIR: str[0] = 'd'; break;
case S_IFBLK: str[0] = 'b'; break;
case S_IFCHR: str[0] = 'c'; break;
case S_IFIFO: str[0] = 'f'; break;
case S_IFLNK: str[0] = 'l'; break;
case S_IFSOCK: str[0] = 's'; break;
case S_IFREG: str[0] = '-'; break;
default: str[0] = '?';
}
for(i = 0; i < 9; i++) {
c = l[i%3];
str[9-i] = (mode & mask)?c:'-';
mask = mask<<1;
}
if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
str[10] = '\0';
return str;
}
static inline void dump_stat(struct stat *st, const char *name)
{
char str[20];
char s[64], *p;
if (st->st_mtime == (time_t)(-1)) /* some ctimes really hate -1 */
st->st_mtime = 1;
ctime_r((time_t *)&st->st_mtime, s/*,64*/); /* newlib ctime doesn't have buflen */
if ((p = strchr(s,'\n')) != NULL) *p = '\0';
if ((p = strchr(s,'\r')) != NULL) *p = '\0';
/*
printf("%6lo %s %8ld %s %s\n", st->st_mode, mkmodestr(st->st_mode, str),
st->st_size, s, name);
*/
printf(" %s %8ld %s %s", mkmodestr(st->st_mode,str), st->st_size, s, name);
}
static inline u32 dump_inode(struct b_lists * pL, struct jffs2_raw_dirent *d, struct jffs2_raw_inode *i)
{
char fname[256];
struct stat st;
if(!d || !i) return -1;
strncpy(fname, (char *)d->name, d->nsize);
fname[d->nsize] = '\0';
memset(&st,0,sizeof(st));
st.st_mtime = i->mtime;
st.st_mode = i->mode;
st.st_ino = i->ino;
st.st_size = i->isize;
dump_stat(&st, fname);
if (d->type == DT_LNK) {
unsigned char *src = (unsigned char *) (&i[1]);
putstr(" -> ");
putnstr(src, (int)i->dsize);
}
putstr("\r\n");
return 0;
}
/* list inodes with the given pino */
static u32
jffs2_1pass_list_inodes(struct b_lists * pL, u32 pino)
{
struct b_node *b;
struct jffs2_raw_dirent *jDir;
for (b = pL->dir.listHead; b; b = b->next) {
jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
pL->readbuf);
if (pino == jDir->pino) {
u32 i_version = 0;
struct jffs2_raw_inode *jNode, *i = NULL;
struct b_node *b2;
#ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
/* Check for more recent versions of this file */
int match;
do {
struct b_node *next = b->next;
struct jffs2_raw_dirent *jDirNext;
if (!next)
break;
jDirNext = (struct jffs2_raw_dirent *)
get_node_mem(next->offset, NULL);
match = jDirNext->pino == jDir->pino &&
jDirNext->nsize == jDir->nsize &&
strncmp((char *)jDirNext->name,
(char *)jDir->name,
jDir->nsize) == 0;
if (match) {
/* Use next. It is more recent */
b = next;
/* Update buffer with the new info */
*jDir = *jDirNext;
}
put_fl_mem(jDirNext, NULL);
} while (match);
#endif
if (jDir->ino == 0) {
/* Deleted file */
put_fl_mem(jDir, pL->readbuf);
continue;
}
for (b2 = pL->frag.listHead; b2; b2 = b2->next) {
jNode = (struct jffs2_raw_inode *)
get_fl_mem(b2->offset, sizeof(*jNode),
NULL);
if (jNode->ino == jDir->ino &&
jNode->version >= i_version) {
i_version = jNode->version;
if (i)
put_fl_mem(i, NULL);
if (jDir->type == DT_LNK)
i = get_node_mem(b2->offset,
NULL);
else
i = get_fl_mem(b2->offset,
sizeof(*i),
NULL);
}
put_fl_mem(jNode, NULL);
}
dump_inode(pL, jDir, i);
put_fl_mem(i, NULL);
}
put_fl_mem(jDir, pL->readbuf);
}
return pino;
}
static u32
jffs2_1pass_search_inode(struct b_lists * pL, const char *fname, u32 pino)
{
int i;
char tmp[256];
char working_tmp[256];
char *c;
/* discard any leading slash */
i = 0;
while (fname[i] == '/')
i++;
strcpy(tmp, &fname[i]);
while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
{
strncpy(working_tmp, tmp, c - tmp);
working_tmp[c - tmp] = '\0';
#if 0
putstr("search_inode: tmp = ");
putstr(tmp);
putstr("\r\n");
putstr("search_inode: wtmp = ");
putstr(working_tmp);
putstr("\r\n");
putstr("search_inode: c = ");
putstr(c);
putstr("\r\n");
#endif
for (i = 0; i < strlen(c) - 1; i++)
tmp[i] = c[i + 1];
tmp[i] = '\0';
#if 0
putstr("search_inode: post tmp = ");
putstr(tmp);
putstr("\r\n");
#endif
if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino))) {
putstr("find_inode failed for name=");
putstr(working_tmp);
putstr("\r\n");
return 0;
}
}
/* this is for the bare filename, directories have already been mapped */
if (!(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
putstr("find_inode failed for name=");
putstr(tmp);
putstr("\r\n");
return 0;
}
return pino;
}
static u32
jffs2_1pass_resolve_inode(struct b_lists * pL, u32 ino)
{
struct b_node *b;
struct b_node *b2;
struct jffs2_raw_dirent *jDir;
struct jffs2_raw_inode *jNode;
u8 jDirFoundType = 0;
u32 jDirFoundIno = 0;
u32 jDirFoundPino = 0;
char tmp[256];
u32 version = 0;
u32 pino;
unsigned char *src;
/* we need to search all and return the inode with the highest version */
for(b = pL->dir.listHead; b; b = b->next) {
jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
pL->readbuf);
if (ino == jDir->ino) {
if (jDir->version < version) {
put_fl_mem(jDir, pL->readbuf);
continue;
}
if (jDir->version == version && jDirFoundType) {
/* I'm pretty sure this isn't legal */
putstr(" ** ERROR ** ");
putnstr(jDir->name, jDir->nsize);
putLabeledWord(" has dup version (resolve) = ",
version);
}
jDirFoundType = jDir->type;
jDirFoundIno = jDir->ino;
jDirFoundPino = jDir->pino;
version = jDir->version;
}
put_fl_mem(jDir, pL->readbuf);
}
/* now we found the right entry again. (shoulda returned inode*) */
if (jDirFoundType != DT_LNK)
return jDirFoundIno;
/* it's a soft link so we follow it again. */
b2 = pL->frag.listHead;
while (b2) {
jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset,
pL->readbuf);
if (jNode->ino == jDirFoundIno) {
src = (unsigned char *)jNode + sizeof(struct jffs2_raw_inode);
#if 0
putLabeledWord("\t\t dsize = ", jNode->dsize);
putstr("\t\t target = ");
putnstr(src, jNode->dsize);
putstr("\r\n");
#endif
strncpy(tmp, (char *)src, jNode->dsize);
tmp[jNode->dsize] = '\0';
put_fl_mem(jNode, pL->readbuf);
break;
}
b2 = b2->next;
put_fl_mem(jNode, pL->readbuf);
}
/* ok so the name of the new file to find is in tmp */
/* if it starts with a slash it is root based else shared dirs */
if (tmp[0] == '/')
pino = 1;
else
pino = jDirFoundPino;
return jffs2_1pass_search_inode(pL, tmp, pino);
}
static u32
jffs2_1pass_search_list_inodes(struct b_lists * pL, const char *fname, u32 pino)
{
int i;
char tmp[256];
char working_tmp[256];
char *c;
/* discard any leading slash */
i = 0;
while (fname[i] == '/')
i++;
strcpy(tmp, &fname[i]);
working_tmp[0] = '\0';
while ((c = (char *) strchr(tmp, '/'))) /* we are still dired searching */
{
strncpy(working_tmp, tmp, c - tmp);
working_tmp[c - tmp] = '\0';
for (i = 0; i < strlen(c) - 1; i++)
tmp[i] = c[i + 1];
tmp[i] = '\0';
/* only a failure if we arent looking at top level */
if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino)) &&
(working_tmp[0])) {
putstr("find_inode failed for name=");
putstr(working_tmp);
putstr("\r\n");
return 0;
}
}
if (tmp[0] && !(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
putstr("find_inode failed for name=");
putstr(tmp);
putstr("\r\n");
return 0;
}
/* this is for the bare filename, directories have already been mapped */
if (!(pino = jffs2_1pass_list_inodes(pL, pino))) {
putstr("find_inode failed for name=");
putstr(tmp);
putstr("\r\n");
return 0;
}
return pino;
}
unsigned char
jffs2_1pass_rescan_needed(struct part_info *part)
{
struct b_node *b;
struct jffs2_unknown_node onode;
struct jffs2_unknown_node *node;
struct b_lists *pL = (struct b_lists *)part->jffs2_priv;
if (part->jffs2_priv == 0){
DEBUGF ("rescan: First time in use\n");
return 1;
}
/* if we have no list, we need to rescan */
if (pL->frag.listCount == 0) {
DEBUGF ("rescan: fraglist zero\n");
return 1;
}
/* but suppose someone reflashed a partition at the same offset... */
b = pL->dir.listHead;
while (b) {
node = (struct jffs2_unknown_node *) get_fl_mem(b->offset,
sizeof(onode), &onode);
if (node->nodetype != JFFS2_NODETYPE_DIRENT) {
DEBUGF ("rescan: fs changed beneath me? (%lx)\n",
(unsigned long) b->offset);
return 1;
}
b = b->next;
}
return 0;
}
#ifdef CONFIG_JFFS2_SUMMARY
static u32 sum_get_unaligned32(u32 *ptr)
{
u32 val;
u8 *p = (u8 *)ptr;
val = *p | (*(p + 1) << 8) | (*(p + 2) << 16) | (*(p + 3) << 24);
return __le32_to_cpu(val);
}
static u16 sum_get_unaligned16(u16 *ptr)
{
u16 val;
u8 *p = (u8 *)ptr;
val = *p | (*(p + 1) << 8);
return __le16_to_cpu(val);
}
#define dbg_summary(...) do {} while (0);
/*
* Process the stored summary information - helper function for
* jffs2_sum_scan_sumnode()
*/
static int jffs2_sum_process_sum_data(struct part_info *part, uint32_t offset,
struct jffs2_raw_summary *summary,
struct b_lists *pL)
{
void *sp;
int i, pass;
void *ret;
for (pass = 0; pass < 2; pass++) {
sp = summary->sum;
for (i = 0; i < summary->sum_num; i++) {
struct jffs2_sum_unknown_flash *spu = sp;
dbg_summary("processing summary index %d\n", i);
switch (sum_get_unaligned16(&spu->nodetype)) {
case JFFS2_NODETYPE_INODE: {
struct jffs2_sum_inode_flash *spi;
if (pass) {
spi = sp;
ret = insert_node(&pL->frag,
(u32)part->offset +
offset +
sum_get_unaligned32(
&spi->offset));
if (ret == NULL)
return -1;
}
sp += JFFS2_SUMMARY_INODE_SIZE;
break;
}
case JFFS2_NODETYPE_DIRENT: {
struct jffs2_sum_dirent_flash *spd;
spd = sp;
if (pass) {
ret = insert_node(&pL->dir,
(u32) part->offset +
offset +
sum_get_unaligned32(
&spd->offset));
if (ret == NULL)
return -1;
}
sp += JFFS2_SUMMARY_DIRENT_SIZE(
spd->nsize);
break;
}
default : {
uint16_t nodetype = sum_get_unaligned16(
&spu->nodetype);
printf("Unsupported node type %x found"
" in summary!\n",
nodetype);
if ((nodetype & JFFS2_COMPAT_MASK) ==
JFFS2_FEATURE_INCOMPAT)
return -EIO;
return -EBADMSG;
}
}
}
}
return 0;
}
/* Process the summary node - called from jffs2_scan_eraseblock() */
int jffs2_sum_scan_sumnode(struct part_info *part, uint32_t offset,
struct jffs2_raw_summary *summary, uint32_t sumsize,
struct b_lists *pL)
{
struct jffs2_unknown_node crcnode;
int ret, __maybe_unused ofs;
uint32_t crc;
ofs = part->sector_size - sumsize;
dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
offset, offset + ofs, sumsize);
/* OK, now check for node validity and CRC */
crcnode.magic = JFFS2_MAGIC_BITMASK;
crcnode.nodetype = JFFS2_NODETYPE_SUMMARY;
crcnode.totlen = summary->totlen;
crc = crc32_no_comp(0, (uchar *)&crcnode, sizeof(crcnode)-4);
if (summary->hdr_crc != crc) {
dbg_summary("Summary node header is corrupt (bad CRC or "
"no summary at all)\n");
goto crc_err;
}
if (summary->totlen != sumsize) {
dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
goto crc_err;
}
crc = crc32_no_comp(0, (uchar *)summary,
sizeof(struct jffs2_raw_summary)-8);
if (summary->node_crc != crc) {
dbg_summary("Summary node is corrupt (bad CRC)\n");
goto crc_err;
}
crc = crc32_no_comp(0, (uchar *)summary->sum,
sumsize - sizeof(struct jffs2_raw_summary));
if (summary->sum_crc != crc) {
dbg_summary("Summary node data is corrupt (bad CRC)\n");
goto crc_err;
}
if (summary->cln_mkr)
dbg_summary("Summary : CLEANMARKER node \n");
ret = jffs2_sum_process_sum_data(part, offset, summary, pL);
if (ret == -EBADMSG)
return 0;
if (ret)
return ret; /* real error */
return 1;
crc_err:
putstr("Summary node crc error, skipping summary information.\n");
return 0;
}
#endif /* CONFIG_JFFS2_SUMMARY */
#ifdef DEBUG_FRAGMENTS
static void
dump_fragments(struct b_lists *pL)
{
struct b_node *b;
struct jffs2_raw_inode ojNode;
struct jffs2_raw_inode *jNode;
putstr("\r\n\r\n******The fragment Entries******\r\n");
b = pL->frag.listHead;
while (b) {
jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
sizeof(ojNode), &ojNode);
putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset);
putLabeledWord("\tbuild_list: totlen = ", jNode->totlen);
putLabeledWord("\tbuild_list: inode = ", jNode->ino);
putLabeledWord("\tbuild_list: version = ", jNode->version);
putLabeledWord("\tbuild_list: isize = ", jNode->isize);
putLabeledWord("\tbuild_list: atime = ", jNode->atime);
putLabeledWord("\tbuild_list: offset = ", jNode->offset);
putLabeledWord("\tbuild_list: csize = ", jNode->csize);
putLabeledWord("\tbuild_list: dsize = ", jNode->dsize);
putLabeledWord("\tbuild_list: compr = ", jNode->compr);
putLabeledWord("\tbuild_list: usercompr = ", jNode->usercompr);
putLabeledWord("\tbuild_list: flags = ", jNode->flags);
putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */
b = b->next;
}
}
#endif
#ifdef DEBUG_DIRENTS
static void
dump_dirents(struct b_lists *pL)
{
struct b_node *b;
struct jffs2_raw_dirent *jDir;
putstr("\r\n\r\n******The directory Entries******\r\n");
b = pL->dir.listHead;
while (b) {
jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset,
pL->readbuf);
putstr("\r\n");
putnstr(jDir->name, jDir->nsize);
putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
putLabeledWord("\tbuild_list: nodetype = ", jDir->nodetype);
putLabeledWord("\tbuild_list: hdr_crc = ", jDir->hdr_crc);
putLabeledWord("\tbuild_list: pino = ", jDir->pino);
putLabeledWord("\tbuild_list: version = ", jDir->version);
putLabeledWord("\tbuild_list: ino = ", jDir->ino);
putLabeledWord("\tbuild_list: mctime = ", jDir->mctime);
putLabeledWord("\tbuild_list: nsize = ", jDir->nsize);
putLabeledWord("\tbuild_list: type = ", jDir->type);
putLabeledWord("\tbuild_list: node_crc = ", jDir->node_crc);
putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc);
putLabeledWord("\tbuild_list: offset = ", b->offset); /* FIXME: ? [RS] */
b = b->next;
put_fl_mem(jDir, pL->readbuf);
}
}
#endif
#define DEFAULT_EMPTY_SCAN_SIZE 256
static inline uint32_t EMPTY_SCAN_SIZE(uint32_t sector_size)
{
if (sector_size < DEFAULT_EMPTY_SCAN_SIZE)
return sector_size;
else
return DEFAULT_EMPTY_SCAN_SIZE;
}
static u32
jffs2_1pass_build_lists(struct part_info * part)
{
struct b_lists *pL;
struct jffs2_unknown_node *node;
u32 nr_sectors;
u32 i;
u32 counter4 = 0;
u32 counterF = 0;
u32 counterN = 0;
u32 max_totlen = 0;
u32 buf_size;
char *buf;
nr_sectors = lldiv(part->size, part->sector_size);
/* turn off the lcd. Refreshing the lcd adds 50% overhead to the */
/* jffs2 list building enterprise nope. in newer versions the overhead is */
/* only about 5 %. not enough to inconvenience people for. */
/* lcd_off(); */
/* if we are building a list we need to refresh the cache. */
jffs_init_1pass_list(part);
pL = (struct b_lists *)part->jffs2_priv;
buf = malloc(DEFAULT_EMPTY_SCAN_SIZE);
puts ("Scanning JFFS2 FS: ");
/* start at the beginning of the partition */
for (i = 0; i < nr_sectors; i++) {
uint32_t sector_ofs = i * part->sector_size;
uint32_t buf_ofs = sector_ofs;
uint32_t buf_len;
uint32_t ofs, prevofs;
#ifdef CONFIG_JFFS2_SUMMARY
struct jffs2_sum_marker *sm;
void *sumptr = NULL;
uint32_t sumlen;
int ret;
#endif
/* Indicates a sector with a CLEANMARKER was found */
int clean_sector = 0;
/* Set buf_size to maximum length */
buf_size = DEFAULT_EMPTY_SCAN_SIZE;
WATCHDOG_RESET();
#ifdef CONFIG_JFFS2_SUMMARY
buf_len = sizeof(*sm);
/* Read as much as we want into the _end_ of the preallocated
* buffer
*/
get_fl_mem(part->offset + sector_ofs + part->sector_size -
buf_len, buf_len, buf + buf_size - buf_len);
sm = (void *)buf + buf_size - sizeof(*sm);
if (sm->magic == JFFS2_SUM_MAGIC) {
sumlen = part->sector_size - sm->offset;
sumptr = buf + buf_size - sumlen;
/* Now, make sure the summary itself is available */
if (sumlen > buf_size) {
/* Need to kmalloc for this. */
sumptr = malloc(sumlen);
if (!sumptr) {
putstr("Can't get memory for summary "
"node!\n");
free(buf);
jffs2_free_cache(part);
return 0;
}
memcpy(sumptr + sumlen - buf_len, buf +
buf_size - buf_len, buf_len);
}
if (buf_len < sumlen) {
/* Need to read more so that the entire summary
* node is present
*/
get_fl_mem(part->offset + sector_ofs +
part->sector_size - sumlen,
sumlen - buf_len, sumptr);
}
}
if (sumptr) {
ret = jffs2_sum_scan_sumnode(part, sector_ofs, sumptr,
sumlen, pL);
if (buf_size && sumlen > buf_size)
free(sumptr);
if (ret < 0) {
free(buf);
jffs2_free_cache(part);
return 0;
}
if (ret)
continue;
}
#endif /* CONFIG_JFFS2_SUMMARY */
buf_len = EMPTY_SCAN_SIZE(part->sector_size);
get_fl_mem((u32)part->offset + buf_ofs, buf_len, buf);
/* We temporarily use 'ofs' as a pointer into the buffer/jeb */
ofs = 0;
/* Scan only 4KiB of 0xFF before declaring it's empty */
while (ofs < EMPTY_SCAN_SIZE(part->sector_size) &&
*(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
ofs += 4;
if (ofs == EMPTY_SCAN_SIZE(part->sector_size))
continue;
ofs += sector_ofs;
prevofs = ofs - 1;
/*
* Set buf_size down to the minimum size required.
* This prevents reading in chunks of flash data unnecessarily.
*/
buf_size = sizeof(union jffs2_node_union);
scan_more:
while (ofs < sector_ofs + part->sector_size) {
if (ofs == prevofs) {
printf("offset %08x already seen, skip\n", ofs);
ofs += 4;
counter4++;
continue;
}
prevofs = ofs;
if (sector_ofs + part->sector_size <
ofs + sizeof(*node))
break;
if (buf_ofs + buf_len < ofs + sizeof(*node)) {
buf_len = min_t(uint32_t, buf_size, sector_ofs
+ part->sector_size - ofs);
get_fl_mem((u32)part->offset + ofs, buf_len,
buf);
buf_ofs = ofs;
}
node = (struct jffs2_unknown_node *)&buf[ofs-buf_ofs];
if (*(uint32_t *)(&buf[ofs-buf_ofs]) == 0xffffffff) {
uint32_t inbuf_ofs;
uint32_t scan_end;
ofs += 4;
scan_end = min_t(uint32_t, EMPTY_SCAN_SIZE(
part->sector_size)/8,
buf_len);
more_empty:
inbuf_ofs = ofs - buf_ofs;
while (inbuf_ofs < scan_end) {
if (*(uint32_t *)(&buf[inbuf_ofs]) !=
0xffffffff)
goto scan_more;
inbuf_ofs += 4;
ofs += 4;
}
/* Ran off end. */
/*
* If this sector had a clean marker at the
* beginning, and immediately following this
* have been a bunch of FF bytes, treat the
* entire sector as empty.
*/
if (clean_sector)
break;
/* See how much more there is to read in this
* eraseblock...
*/
buf_len = min_t(uint32_t, buf_size,
sector_ofs +
part->sector_size - ofs);
if (!buf_len) {
/* No more to read. Break out of main
* loop without marking this range of
* empty space as dirty (because it's
* not)
*/
break;
}
scan_end = buf_len;
get_fl_mem((u32)part->offset + ofs, buf_len,
buf);
buf_ofs = ofs;
goto more_empty;
}
/*
* Found something not erased in the sector, so reset
* the 'clean_sector' flag.
*/
clean_sector = 0;
if (node->magic != JFFS2_MAGIC_BITMASK ||
!hdr_crc(node)) {
ofs += 4;
counter4++;
continue;
}
if (ofs + node->totlen >
sector_ofs + part->sector_size) {
ofs += 4;
counter4++;
continue;
}
/* if its a fragment add it */
switch (node->nodetype) {
case JFFS2_NODETYPE_INODE:
if (buf_ofs + buf_len < ofs + sizeof(struct
jffs2_raw_inode)) {
buf_len = min_t(uint32_t,
sizeof(struct jffs2_raw_inode),
sector_ofs +
part->sector_size -
ofs);
get_fl_mem((u32)part->offset + ofs,
buf_len, buf);
buf_ofs = ofs;
node = (void *)buf;
}
if (!inode_crc((struct jffs2_raw_inode *)node))
break;
if (insert_node(&pL->frag, (u32) part->offset +
ofs) == NULL) {
free(buf);
jffs2_free_cache(part);
return 0;
}
if (max_totlen < node->totlen)
max_totlen = node->totlen;
break;
case JFFS2_NODETYPE_DIRENT:
if (buf_ofs + buf_len < ofs + sizeof(struct
jffs2_raw_dirent) +
((struct
jffs2_raw_dirent *)
node)->nsize) {
buf_len = min_t(uint32_t,
node->totlen,
sector_ofs +
part->sector_size -
ofs);
get_fl_mem((u32)part->offset + ofs,
buf_len, buf);
buf_ofs = ofs;
node = (void *)buf;
}
if (!dirent_crc((struct jffs2_raw_dirent *)
node) ||
!dirent_name_crc(
(struct
jffs2_raw_dirent *)
node))
break;
if (! (counterN%100))
puts ("\b\b. ");
if (insert_node(&pL->dir, (u32) part->offset +
ofs) == NULL) {
free(buf);
jffs2_free_cache(part);
return 0;
}
if (max_totlen < node->totlen)
max_totlen = node->totlen;
counterN++;
break;
case JFFS2_NODETYPE_CLEANMARKER:
if (node->totlen != sizeof(struct jffs2_unknown_node))
printf("OOPS Cleanmarker has bad size "
"%d != %zu\n",
node->totlen,
sizeof(struct jffs2_unknown_node));
if ((node->totlen ==
sizeof(struct jffs2_unknown_node)) &&
(ofs == sector_ofs)) {
/*
* Found a CLEANMARKER at the beginning
* of the sector. It's in the correct
* place with correct size and CRC.
*/
clean_sector = 1;
}
break;
case JFFS2_NODETYPE_PADDING:
if (node->totlen < sizeof(struct jffs2_unknown_node))
printf("OOPS Padding has bad size "
"%d < %zu\n",
node->totlen,
sizeof(struct jffs2_unknown_node));
break;
case JFFS2_NODETYPE_SUMMARY:
break;
default:
printf("Unknown node type: %x len %d offset 0x%x\n",
node->nodetype,
node->totlen, ofs);
}
ofs += ((node->totlen + 3) & ~3);
counterF++;
}
}
free(buf);
#if defined(CONFIG_SYS_JFFS2_SORT_FRAGMENTS)
/*
* Sort the lists.
*/
sort_list(&pL->frag);
sort_list(&pL->dir);
#endif
putstr("\b\b done.\r\n"); /* close off the dots */
/* We don't care if malloc failed - then each read operation will
* allocate its own buffer as necessary (NAND) or will read directly
* from flash (NOR).
*/
pL->readbuf = malloc(max_totlen);
/* turn the lcd back on. */
/* splash(); */
#if 0
putLabeledWord("dir entries = ", pL->dir.listCount);
putLabeledWord("frag entries = ", pL->frag.listCount);
putLabeledWord("+4 increments = ", counter4);
putLabeledWord("+file_offset increments = ", counterF);
#endif
#ifdef DEBUG_DIRENTS
dump_dirents(pL);
#endif
#ifdef DEBUG_FRAGMENTS
dump_fragments(pL);
#endif
/* give visual feedback that we are done scanning the flash */
led_blink(0x0, 0x0, 0x1, 0x1); /* off, forever, on 100ms, off 100ms */
return 1;
}
static u32
jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL)
{
struct b_node *b;
struct jffs2_raw_inode ojNode;
struct jffs2_raw_inode *jNode;
int i;
for (i = 0; i < JFFS2_NUM_COMPR; i++) {
piL->compr_info[i].num_frags = 0;
piL->compr_info[i].compr_sum = 0;
piL->compr_info[i].decompr_sum = 0;
}
b = pL->frag.listHead;
while (b) {
jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
sizeof(ojNode), &ojNode);
if (jNode->compr < JFFS2_NUM_COMPR) {
piL->compr_info[jNode->compr].num_frags++;
piL->compr_info[jNode->compr].compr_sum += jNode->csize;
piL->compr_info[jNode->compr].decompr_sum += jNode->dsize;
}
b = b->next;
}
return 0;
}
static struct b_lists *
jffs2_get_list(struct part_info * part, const char *who)
{
/* copy requested part_info struct pointer to global location */
current_part = part;
if (jffs2_1pass_rescan_needed(part)) {
if (!jffs2_1pass_build_lists(part)) {
printf("%s: Failed to scan JFFSv2 file structure\n", who);
return NULL;
}
}
return (struct b_lists *)part->jffs2_priv;
}
/* Print directory / file contents */
u32
jffs2_1pass_ls(struct part_info * part, const char *fname)
{
struct b_lists *pl;
long ret = 1;
u32 inode;
if (! (pl = jffs2_get_list(part, "ls")))
return 0;
if (! (inode = jffs2_1pass_search_list_inodes(pl, fname, 1))) {
putstr("ls: Failed to scan jffs2 file structure\r\n");
return 0;
}
#if 0
putLabeledWord("found file at inode = ", inode);
putLabeledWord("read_inode returns = ", ret);
#endif
return ret;
}
/* Load a file from flash into memory. fname can be a full path */
u32
jffs2_1pass_load(char *dest, struct part_info * part, const char *fname)
{
struct b_lists *pl;
long ret = 1;
u32 inode;
if (! (pl = jffs2_get_list(part, "load")))
return 0;
if (! (inode = jffs2_1pass_search_inode(pl, fname, 1))) {
putstr("load: Failed to find inode\r\n");
return 0;
}
/* Resolve symlinks */
if (! (inode = jffs2_1pass_resolve_inode(pl, inode))) {
putstr("load: Failed to resolve inode structure\r\n");
return 0;
}
if ((ret = jffs2_1pass_read_inode(pl, inode, dest)) < 0) {
putstr("load: Failed to read inode\r\n");
return 0;
}
DEBUGF ("load: loaded '%s' to 0x%lx (%ld bytes)\n", fname,
(unsigned long) dest, ret);
return ret;
}
/* Return information about the fs on this partition */
u32
jffs2_1pass_info(struct part_info * part)
{
struct b_jffs2_info info;
struct b_lists *pl;
int i;
if (! (pl = jffs2_get_list(part, "info")))
return 0;
jffs2_1pass_fill_info(pl, &info);
for (i = 0; i < JFFS2_NUM_COMPR; i++) {
printf ("Compression: %s\n"
"\tfrag count: %d\n"
"\tcompressed sum: %d\n"
"\tuncompressed sum: %d\n",
compr_names[i],
info.compr_info[i].num_frags,
info.compr_info[i].compr_sum,
info.compr_info[i].decompr_sum);
}
return 1;
}
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