/* vi: set sw=4 ts=4: */
/*
-------------------------------------------------------------------------
* 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 CFG_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
* is 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 <linux/stat.h>
#include <linux/time.h>
#if (CONFIG_COMMANDS & CFG_CMD_JFFS2)
#include <jffs2/jffs2.h>
#include <jffs2/jffs2_1pass.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
/* Compression names */
static char *compr_names[] = {
"NONE",
"ZERO",
"RTIME",
"RUBINMIPS",
"COPY",
"DYNRUBIN",
"ZLIB"
};
/* Spinning wheel */
static char spinner[] = { '|', '/', '-', '\\' };
/* 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;
#ifdef CFG_JFFS2_SORT_FRAGMENTS
struct b_node *b, *prev;
#endif
if (!(new = add_node(list))) {
putstr("add_node failed!\r\n");
return NULL;
}
new->offset = offset;
#ifdef CFG_JFFS2_SORT_FRAGMENTS
if (list->listTail != NULL && list->listCompare(new, list->listTail))
prev = list->listTail;
else if (list->listLast != NULL && list->listCompare(new, list->listLast))
prev = list->listLast;
else
prev = NULL;
for (b = (prev ? prev->next : list->listHead);
b != NULL && list->listCompare(new, b);
prev = b, b = b->next) {
list->listLoops++;
}
if (b != NULL)
list->listLast = prev;
if (b != NULL) {
new->next = b;
if (prev != NULL)
prev->next = new;
else
list->listHead = new;
} else
#endif
{
new->next = (struct b_node *) NULL;
if (list->listTail != NULL) {
list->listTail->next = new;
list->listTail = new;
} else {
list->listTail = list->listHead = new;
}
}
return new;
}
#ifdef CFG_JFFS2_SORT_FRAGMENTS
static int compare_inodes(struct b_node *new, struct b_node *old)
{
struct jffs2_raw_inode *jNew = (struct jffs2_raw_inode *)new->offset;
struct jffs2_raw_inode *jOld = (struct jffs2_raw_inode *)old->offset;
return jNew->version < jOld->version;
}
static int compare_dirents(struct b_node *new, struct b_node *old)
{
struct jffs2_raw_dirent *jNew = (struct jffs2_raw_dirent *)new->offset;
struct jffs2_raw_dirent *jOld = (struct jffs2_raw_dirent *)old->offset;
return jNew->version > jOld->version;
}
#endif
static u32
jffs2_scan_empty(u32 start_offset, struct part_info *part)
{
char *max = part->offset + part->size - sizeof(struct jffs2_raw_inode);
char *offset = part->offset + start_offset;
while (offset < max && *(u32 *)offset == 0xFFFFFFFF) {
offset += sizeof(u32);
/* return if spinning is due */
if (((u32)offset & ((1 << SPIN_BLKSIZE)-1)) == 0) break;
}
return offset - part->offset;
}
static u32
jffs_init_1pass_list(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);
}
if (NULL != (part->jffs2_priv = malloc(sizeof(struct b_lists)))) {
pL = (struct b_lists *)part->jffs2_priv;
memset(pL, 0, sizeof(*pL));
#ifdef CFG_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;
u16 latestVersion = 0;
char *lDest;
char *src;
long ret;
int i;
u32 counter = 0;
for (b = pL->frag.listHead; b != NULL; b = b->next) {
jNode = (struct jffs2_raw_inode *) (b->offset);
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
/* get actual file length from the newest node */
if (jNode->version >= latestVersion) {
totalSize = jNode->isize;
latestVersion = jNode->version;
}
if(dest) {
src = ((char *) jNode) + sizeof(struct jffs2_raw_inode);
/* ignore data behind latest known EOF */
if (jNode->offset > totalSize)
continue;
lDest = (char *) (dest + jNode->offset);
#if 0
putLabeledWord("read_inode: src = ", src);
putLabeledWord("read_inode: dest = ", lDest);
#endif
switch (jNode->compr) {
case JFFS2_COMPR_NONE:
ret = (unsigned long) ldr_memcpy(lDest, src, jNode->dsize);
break;
case JFFS2_COMPR_ZERO:
ret = 0;
for (i = 0; i < jNode->dsize; i++)
*(lDest++) = 0;
break;
case JFFS2_COMPR_RTIME:
ret = 0;
rtime_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
case JFFS2_COMPR_DYNRUBIN:
/* this is slow but it works */
ret = 0;
dynrubin_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
case JFFS2_COMPR_ZLIB:
ret = zlib_decompress(src, lDest, jNode->csize, jNode->dsize);
break;
default:
/* unknown */
putLabeledWord("UNKOWN COMPRESSION METHOD = ", jNode->compr);
return -1;
break;
}
}
#if 0
putLabeledWord("read_inode: totalSize = ", totalSize);
putLabeledWord("read_inode: compr ret = ", ret);
#endif
}
counter++;
}
#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 *) (b->offset);
if ((pino == jDir->pino) && (len == jDir->nsize) &&
(jDir->ino) && /* 0 for unlink */
(!strncmp(jDir->name, name, len))) { /* a match */
if (jDir->version < version) continue;
if(jDir->version == 0) {
/* Is this legal? */
putstr(" ** WARNING ** ");
putnstr(jDir->name, jDir->nsize);
putstr(" is version 0 (in find, ignoring)\r\n");
} else if(jDir->version == version) {
/* Im pretty sure this isn't ... */
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
}
return inode;
}
static 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(&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, 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;
/* neither dsize nor isize help us.. do it the long way */
st.st_size = jffs2_1pass_read_inode(pL, i->ino, NULL);
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 *) (b->offset);
if ((pino == jDir->pino) && (jDir->ino)) { /* ino=0 -> unlink */
u32 i_version = 0;
struct jffs2_raw_inode *jNode, *i = NULL;
struct b_node *b2 = pL->frag.listHead;
while (b2) {
jNode = (struct jffs2_raw_inode *) (b2->offset);
if (jNode->ino == jDir->ino
&& jNode->version >= i_version)
i = jNode;
b2 = b2->next;
}
dump_inode(pL, jDir, i);
}
}
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;
struct jffs2_raw_dirent *jDirFound = NULL;
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 *) (b->offset);
if (ino == jDir->ino) {
if(jDir->version < version) continue;
if(jDir->version == 0) {
/* Is this legal? */
putstr(" ** WARNING ** ");
putnstr(jDir->name, jDir->nsize);
putstr(" is version 0 (in resolve, ignoring)\r\n");
} else if(jDir->version == version) {
/* Im pretty sure this isn't ... */
putstr(" ** ERROR ** ");
putnstr(jDir->name, jDir->nsize);
putLabeledWord(" has dup version (resolve) = ",
version);
}
jDirFound = jDir;
version = jDir->version;
}
}
/* now we found the right entry again. (shoulda returned inode*) */
if (jDirFound->type != DT_LNK)
return jDirFound->ino;
/* it's a soft link so we follow it again. */
b2 = pL->frag.listHead;
while (b2) {
jNode = (struct jffs2_raw_inode *) (b2->offset);
if (jNode->ino == jDirFound->ino) {
src = (unsigned char *) (b2->offset + 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, src, jNode->dsize);
tmp[jNode->dsize] = '\0';
break;
}
b2 = b2->next;
}
/* 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 = jDirFound->pino;
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 *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;
}
/* or if we are scanning a new partition */
if (pL->partOffset != part->offset) {
DEBUGF ("rescan: different partition\n");
return 1;
}
/* but suppose someone reflashed a partition at the same offset... */
b = pL->dir.listHead;
while (b) {
node = (struct jffs2_unknown_node *) (b->offset);
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 DEBUG_FRAGMENTS
static void
dump_fragments(struct b_lists *pL)
{
struct b_node *b;
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 *) (b->offset);
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 *) (b->offset);
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;
}
}
#endif
static u32
jffs2_1pass_build_lists(struct part_info * part)
{
struct b_lists *pL;
struct jffs2_unknown_node *node;
u32 offset, oldoffset = 0;
u32 max = part->size - sizeof(struct jffs2_raw_inode);
u32 counter = 0;
u32 counter4 = 0;
u32 counterF = 0;
u32 counterN = 0;
/* 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;
pL->partOffset = part->offset;
offset = 0;
printf("Scanning JFFS2 FS: ");
/* start at the beginning of the partition */
while (offset < max) {
if ((oldoffset >> SPIN_BLKSIZE) != (offset >> SPIN_BLKSIZE)) {
printf("\b\b%c ", spinner[counter++ % sizeof(spinner)]);
oldoffset = offset;
}
node = (struct jffs2_unknown_node *) (part->offset + offset);
if (node->magic == JFFS2_MAGIC_BITMASK && hdr_crc(node)) {
/* if its a fragment add it */
if (node->nodetype == JFFS2_NODETYPE_INODE &&
inode_crc((struct jffs2_raw_inode *) node)) {
if (insert_node(&pL->frag, (u32) part->offset +
offset) == NULL)
return 0;
} else if (node->nodetype == JFFS2_NODETYPE_DIRENT &&
dirent_crc((struct jffs2_raw_dirent *) node) &&
dirent_name_crc((struct jffs2_raw_dirent *) node)) {
if (! (counterN%100))
printf("\b\b. ");
if (insert_node(&pL->dir, (u32) part->offset +
offset) == NULL)
return 0;
counterN++;
} else if (node->nodetype == JFFS2_NODETYPE_CLEANMARKER) {
if (node->totlen != sizeof(struct jffs2_unknown_node))
printf("OOPS Cleanmarker has bad size "
"%d != %d\n", node->totlen,
sizeof(struct jffs2_unknown_node));
} else {
printf("Unknown node type: %x len %d "
"offset 0x%x\n", node->nodetype,
node->totlen, offset);
}
offset += ((node->totlen + 3) & ~3);
counterF++;
} else if (node->magic == JFFS2_EMPTY_BITMASK &&
node->nodetype == JFFS2_EMPTY_BITMASK) {
offset = jffs2_scan_empty(offset, part);
} else { /* if we know nothing, we just step and look. */
offset += 4;
counter4++;
}
/* printf("unknown node magic %4.4x %4.4x @ %lx\n", node->magic, node->nodetype, (unsigned long)node); */
}
putstr("\b\b done.\r\n"); /* close off the dots */
/* 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 *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 *) (b->offset);
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)
{
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 = 0;
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 = 0;
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", compr_names[i]);
printf("\tfrag count: %d\n", info.compr_info[i].num_frags);
printf("\tcompressed sum: %d\n", info.compr_info[i].compr_sum);
printf("\tuncompressed sum: %d\n", info.compr_info[i].decompr_sum);
}
return 1;
}
#endif /* CFG_CMD_JFFS2 */
