+/*
+ * jffs2 on-disk structure generator for mtd
+ *
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License v2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ * Based on:
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ * Copyright © 2001-2007 Red Hat, Inc.
+ * Created by David Woodhouse <dwmw2@infradead.org>
+ */
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
+#include <endian.h>
#include "jffs2.h"
#include "crc32.h"
#include "mtd.h"
#define PAD(x) (((x)+3)&~3)
-#define CLEANMARKER "\x85\x19\x03\x20\x0c\x00\x00\x00\xb1\xb0\x1e\xe4"
-#define JFFS2_EOF "\xde\xad\xc0\xde"
+#if BYTE_ORDER == BIG_ENDIAN
+# define CLEANMARKER "\x19\x85\x20\x03\x00\x00\x00\x0c\xf0\x60\xdc\x98"
+#else
+# define CLEANMARKER "\x85\x19\x03\x20\x0c\x00\x00\x00\xb1\xb0\x1e\xe4"
+#endif
static int last_ino = 0;
static int last_version = 0;
static char *buf = NULL;
static int ofs = 0;
-static int outfd = 0;
+static int outfd = -1;
static int mtdofs = 0;
+static int target_ino = 0;
static void prep_eraseblock(void);
add_data(CLEANMARKER, sizeof(CLEANMARKER) - 1);
}
-static int add_dirent(char *name, char type, int parent)
+static int add_dirent(const char *name, const char type, int parent)
{
struct jffs2_raw_dirent *de;
return de->ino;
}
-static int add_dir(char *name, int parent)
+static int add_dir(const char *name, int parent)
{
struct jffs2_raw_inode ri;
int inode;
return inode;
}
-static void add_file(char *name, int parent)
+static void add_file(const char *name, int parent)
{
int inode, f_offset = 0, fd;
struct jffs2_raw_inode ri;
struct stat st;
- char wbuf[4096], *fname;
- FILE *f;
+ char wbuf[4096];
+ const char *fname;
if (stat(name, &st)) {
fprintf(stderr, "File %s does not exist\n", name);
ri.usercompr = 0;
fd = open(name, 0);
- if (fd <= 0) {
+ if (fd < 0) {
fprintf(stderr, "File %s does not exist\n", name);
return;
}
close(fd);
}
-int mtd_write_jffs2(char *mtd, char *filename, char *dir)
+int mtd_replace_jffs2(const char *mtd, int fd, int ofs, const char *filename)
+{
+ outfd = fd;
+ mtdofs = ofs;
+
+ buf = malloc(erasesize);
+ target_ino = 1;
+ if (!last_ino)
+ last_ino = 1;
+ add_file(filename, target_ino);
+ pad(erasesize);
+
+ /* add eof marker, pad to eraseblock size and write the data */
+ add_data(JFFS2_EOF, sizeof(JFFS2_EOF) - 1);
+ pad(erasesize);
+ free(buf);
+
+ if (trx_fixup) {
+ trx_fixup(outfd, mtd);
+ }
+ return (mtdofs - ofs);
+}
+
+void mtd_parse_jffs2data(const char *buf, const char *dir)
+{
+ struct jffs2_unknown_node *node = (struct jffs2_unknown_node *) buf;
+ unsigned int ofs = 0;
+
+ while (ofs < erasesize) {
+ node = (struct jffs2_unknown_node *) (buf + ofs);
+ if (node->magic != 0x1985)
+ break;
+
+ ofs += PAD(node->totlen);
+ if (node->nodetype == JFFS2_NODETYPE_DIRENT) {
+ struct jffs2_raw_dirent *de = (struct jffs2_raw_dirent *) node;
+
+ /* is this the right directory name and is it a subdirectory of / */
+ if (*dir && (de->pino == 1) && !strncmp((char *) de->name, dir, de->nsize))
+ target_ino = de->ino;
+
+ /* store the last inode and version numbers for adding extra files */
+ if (last_ino < de->ino)
+ last_ino = de->ino;
+ if (last_version < de->version)
+ last_version = de->version;
+ }
+ }
+}
+
+int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir)
{
- int target_ino = 0;
int err = -1, fdeof = 0;
- off_t offset;
outfd = mtd_check_open(mtd);
- if (!outfd)
+ if (outfd < 0)
return -1;
if (quiet < 2)
* locate the directory that the file is going to be placed in */
for(;;) {
struct jffs2_unknown_node *node = (struct jffs2_unknown_node *) buf;
- unsigned int ofs = 0;
if (read(outfd, buf, erasesize) != erasesize) {
fdeof = 1;
if (node->magic != 0x1985)
break;
- while (ofs < erasesize) {
- node = (struct jffs2_unknown_node *) (buf + ofs);
- if (node->magic == 0x1985) {
- ofs += PAD(node->totlen);
- if (node->nodetype == JFFS2_NODETYPE_DIRENT) {
- struct jffs2_raw_dirent *de = (struct jffs2_raw_dirent *) node;
-
- /* is this the right directory name and is it a subdirectory of / */
- if (*dir && (de->pino == 1) && !strncmp(de->name, dir, de->nsize))
- target_ino = de->ino;
-
- /* store the last inode and version numbers for adding extra files */
- if (last_ino < de->ino)
- last_ino = de->ino;
- if (last_version < de->version)
- last_version = de->version;
- }
- } else {
- ofs = ~0;
- }
- }
+ mtd_parse_jffs2data(buf, dir);
}
if (fdeof) {
err = 0;
+ if (trx_fixup) {
+ trx_fixup(outfd, mtd);
+ }
+
done:
close(outfd);
if (buf)
projects / openwrt.git / blobdiff