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u-boot/fs/jffs2/jffs2_1pass.c
Mark Tomlinson 10d3ac346f JFFS2: Use merge sort when parsing filesystem 
When building the file system the existing code does an insertion into
a linked list. It attempts to speed this up by keeping a pointer to
where the last entry was inserted but it's still slow.

Now the nodes are just inserted into the list without searching
through for the correct place. This unsorted list is then sorted once
using mergesort after all the entries have been added to the list.
This speeds up the scanning of the flash file system considerably.

Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
2015-08-12 20:47:32 -04:00

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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/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, 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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