Initial revision

1 files changed, 995 insertions, 0 deletions

diff --git a/fs/jffs2/jffs2_1pass.c b/fs/jffs2/jffs2_1pass.c
new file mode 100644
index 0000000..bacec8e
--- /dev/null
+++ b/fs/jffs2/jffs2_1pass.c
@@ -0,0 +1,995 @@
+/*
+-------------------------------------------------------------------------
+ * 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 ;).
+ *
+ */
+
+#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"
+
+/* Compression names */
+static char *compr_names[] = {
+        "NONE",
+        "ZERO",
+        "RTIME",
+        "RUBINMIPS",
+        "COPY",
+        "DYNRUBIN",
+        "ZLIB" };
+
+static char spinner[] = { '|', '\\', '-', '/' };
+
+#define DEBUG
+#ifdef  DEBUG
+# define DEBUGF(fmt,args...)	printf(fmt ,##args)
+#else
+# define DEBUGF(fmt,args...)
+#endif
+
+#define MALLOC_CHUNK (10*1024)
+
+
+static struct b_node *
+add_node(struct b_node *tail, u32 * count, u32 * memBase)
+{
+	u32 index;
+	u32 memLimit;
+	struct b_node *b;
+
+	index = (*count) * sizeof(struct b_node) % MALLOC_CHUNK;
+	memLimit = MALLOC_CHUNK;
+
+#if 0
+	putLabeledWord("add_node: index = ", index);
+	putLabeledWord("add_node: memLimit = ", memLimit);
+	putLabeledWord("add_node: memBase = ", *memBase);
+#endif
+
+	/* we need not keep a list of bases since we'll never free the */
+	/* memory, just jump the the kernel */
+	if ((index == 0) || (index > memLimit)) {	/* we need mode space before we continue */
+		if ((*memBase = (u32) mmalloc(MALLOC_CHUNK)) == (u32) NULL) {
+			putstr("add_node: malloc failed\n");
+			return NULL;
+		}
+#if 0
+		putLabeledWord("add_node: alloced a new membase at ", *memBase);
+#endif
+
+	}
+	/* now we have room to add it. */
+	b = (struct b_node *) (*memBase + index);
+
+	/* null on first call */
+	if (tail)
+		tail->next = b;
+
+#if 0
+	putLabeledWord("add_node: tail = ", (u32) tail);
+	if (tail)
+		putLabeledWord("add_node: tail->next = ", (u32) tail->next);
+
+#endif
+
+#if 0
+	putLabeledWord("add_node: mb+i = ", (u32) (*memBase + index));
+	putLabeledWord("add_node: b = ", (u32) b);
+#endif
+	(*count)++;
+	b->next = (struct b_node *) NULL;
+	return b;
+
+}
+
+/* we know we have empties at the start offset so we will hop */
+/* t points that would be non F if there were a node here to speed this up. */
+struct jffs2_empty_node {
+	u32 first;
+	u32 second;
+};
+
+static u32
+jffs2_scan_empty(u32 start_offset, struct part_info *part)
+{
+	u32 max = part->size - sizeof(struct jffs2_raw_inode);
+
+	/* this would be either dir node_crc or frag isize */
+	u32 offset = start_offset + 32;
+	struct jffs2_empty_node *node;
+
+	start_offset += 4;
+	while (offset < max) {
+		node = (struct jffs2_empty_node *) (part->offset + offset);
+		if ((node->first == 0xFFFFFFFF) && (node->second == 0xFFFFFFFF)) {
+			/* we presume that there were no nodes in between and advance in a hop */
+			/* putLabeledWord("\t\tjffs2_scan_empty: empty at offset=",offset); */
+			start_offset = offset + 4;
+			offset = start_offset + 32;	/* orig 32 + 4 bytes for the second==0xfffff */
+		} else {
+			return start_offset;
+		}
+	}
+	return start_offset;
+}
+
+static u32
+jffs_init_1pass_list(struct part_info *part)
+{
+	if ( 0 != ( part->jffs2_priv=malloc(sizeof(struct b_lists)))){
+		struct b_lists *pL =(struct b_lists *)part->jffs2_priv;
+
+		pL->dirListHead = pL->dirListTail = NULL;
+		pL->fragListHead = pL->fragListTail = NULL;
+		pL->dirListCount = 0;
+		pL->dirListMemBase = 0;
+		pL->fragListCount = 0;
+		pL->fragListMemBase = 0;
+		pL->partOffset = 0x0;
+	}
+	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 = 1;
+	u32 oldTotalSize = 0;
+	u32 size = 0;
+	char *lDest = (char *) dest;
+	char *src;
+	long ret;
+	int i;
+	u32 counter = 0;
+	char totalSizeSet = 0;
+
+#if 0
+	b = pL->fragListHead;
+	while (b) {
+		jNode = (struct jffs2_raw_inode *) (b->offset);
+		if ((inode == jNode->ino)) {
+			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);
+		}
+
+		b = b->next;
+	}
+
+#endif
+
+#if 1
+	b = pL->fragListHead;
+	while (b && (size < totalSize)) {
+		jNode = (struct jffs2_raw_inode *) (b->offset);
+		if ((inode == jNode->ino)) {
+			if ((jNode->isize == oldTotalSize) && (jNode->isize > totalSize)) {
+				/* 2 consecutive isizes indicate file length */
+				totalSize = jNode->isize;
+				totalSizeSet = 1;
+			} else if (!totalSizeSet) {
+				totalSize = size + jNode->dsize + 1;
+			}
+			oldTotalSize = jNode->isize;
+
+			if(dest) {
+				src = ((char *) jNode) + sizeof(struct jffs2_raw_inode);
+				/* lDest = (char *) (dest + (jNode->offset & ~3)); */
+				lDest = (char *) (dest + jNode->offset);
+#if 0
+				putLabeledWord("\r\n\r\nread_inode: src = ", src);
+				putLabeledWord("read_inode: dest = ", lDest);
+				putLabeledWord("read_inode: dsize = ", jNode->dsize);
+				putLabeledWord("read_inode: csize = ", jNode->csize);
+				putLabeledWord("read_inode: version = ", jNode->version);
+				putLabeledWord("read_inode: isize = ", jNode->isize);
+				putLabeledWord("read_inode: offset = ", jNode->offset);
+				putLabeledWord("read_inode: compr = ", jNode->compr);
+				putLabeledWord("read_inode: flags = ", jNode->flags);
+#endif
+				switch (jNode->compr) {
+				case JFFS2_COMPR_NONE:
+#if 0
+					{
+						int i;
+
+						if ((dest > 0xc0092ff0) && (dest < 0xc0093000))
+							for (i = 0; i < first->length; i++) {
+								putLabeledWord("\tCOMPR_NONE: src =", src + i);
+								putLabeledWord("\tCOMPR_NONE: length =", first->length);
+								putLabeledWord("\tCOMPR_NONE: dest =", dest + i);
+								putLabeledWord("\tCOMPR_NONE: data =", (unsigned char) *(src + i));
+							}
+					}
+#endif
+
+					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;
+				}
+			}
+
+			size += jNode->dsize;
+#if 0
+			putLabeledWord("read_inode: size = ", size);
+			putLabeledWord("read_inode: totalSize = ", totalSize);
+			putLabeledWord("read_inode: compr ret = ", ret);
+#endif
+		}
+		b = b->next;
+		counter++;
+	}
+#endif
+
+#if 0
+	putLabeledWord("read_inode: returning = ", size);
+#endif
+	return size;
+}
+
+/* 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->dirListHead;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->dirListHead;b;b=b->next) {
+		jDir = (struct jffs2_raw_dirent *) (b->offset);
+		if ((pino == jDir->pino) && (jDir->ino)) {	/* 0 inode for unlink */
+			u32 i_version=0;
+			struct jffs2_raw_inode *jNode, *i=NULL;
+			struct b_node *b2 = pL->fragListHead;
+
+			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->dirListHead; 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;
+	/* so its a soft link so we follow it again. */
+	b2 = pL->fragListHead;
+	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->fragListCount == 0) {
+		DEBUGF ("rescan: fraglist zero\n");
+		return 1;
+	}
+
+	/* or if we are scanninga new partition */
+	if (pL->partOffset != part->offset) {
+		DEBUGF ("rescan: different partition\n");
+		return 1;
+	}
+	/* but suppose someone reflashed the root partition at the same offset... */
+	b = pL->dirListHead;
+	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;
+}
+
+static u32
+jffs2_1pass_build_lists(struct part_info * part)
+{
+	struct b_lists *pL;
+	struct jffs2_unknown_node *node;
+	u32 offset;
+	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. */
+	/* note that since we don't free our memory, eventually this will be bad. */
+	/* but we're a bootldr so what the hell. */
+	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 (! (++counter%10000))
+			printf("\b\b%c ", spinner[(counter / 10000) % 4]);
+
+		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 (!(pL->fragListTail = add_node(pL->fragListTail, &(pL->fragListCount),
+								  &(pL->fragListMemBase)))) {
+					putstr("add_node failed!\r\n");
+					return 0;
+				}
+				pL->fragListTail->offset = (u32) (part->offset + offset);
+				if (!pL->fragListHead)
+					pL->fragListHead = pL->fragListTail;
+			} 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 0
+				printf("Found DIRENT @ 0x%lx\n", offset);
+				putstr("\r\nbuild_lists:p&l ->");
+				putnstr(((struct jffs2_raw_dirent *) node)->name, ((struct jffs2_raw_dirent *) node)->nsize);
+				putstr("\r\n");
+				putLabeledWord("\tpino = ", ((struct jffs2_raw_dirent *) node)->pino);
+				putLabeledWord("\tnsize = ", ((struct jffs2_raw_dirent *) node)->nsize);
+#endif
+
+				if (!(pL->dirListTail = add_node(pL->dirListTail, &(pL->dirListCount), &(pL->dirListMemBase)))) {
+					putstr("add_node failed!\r\n");
+					return 0;
+				}
+				pL->dirListTail->offset = (u32) (part->offset + offset);
+#if 0
+				putLabeledWord("\ttail = ", (u32) pL->dirListTail);
+				putstr("\ttailName ->");
+				putnstr(((struct jffs2_raw_dirent *) (pL->dirListTail->offset))->name,
+					((struct jffs2_raw_dirent *) (pL->dirListTail->offset))->nsize);
+				putstr("\r\n");
+#endif
+				if (!pL->dirListHead)
+					pL->dirListHead = pL->dirListTail;
+				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 of the filesystem, 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->dirListCount);
+	putLabeledWord("frag entries = ", pL->fragListCount);
+	putLabeledWord("+4 increments = ", counter4);
+	putLabeledWord("+file_offset increments = ", counterF);
+
+#endif
+
+#undef SHOW_ALL
+#undef SHOW_ALL_FRAGMENTS
+
+#ifdef SHOW_ALL
+	{
+		struct b_node *b;
+		struct b_node *b2;
+		struct jffs2_raw_dirent *jDir;
+		struct jffs2_raw_inode *jNode;
+
+		putstr("\r\n\r\n******The directory Entries******\r\n");
+		b = pL->dirListHead;
+		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);
+			b = b->next;
+		}
+
+#ifdef SHOW_ALL_FRAGMENTS
+		putstr("\r\n\r\n******The fragment Entries******\r\n");
+		b = pL->fragListHead;
+		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);
+			b = b->next;
+		}
+#endif /* SHOW_ALL_FRAGMENTS */
+	}
+
+#endif	/* SHOW_ALL */
+	/* 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;
+
+	b = pL->fragListHead;
+	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;
+	}
+
+	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 */