X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/c52dd373c6aae88a4640981f5746e7f727367d15..ae57d8838ce086c44a95b54816191ed9e92545b2:/package/mtd/src/jffs2.c diff --git a/package/mtd/src/jffs2.c b/package/mtd/src/jffs2.c index 7b68ae575..49a7d5612 100644 --- a/package/mtd/src/jffs2.c +++ b/package/mtd/src/jffs2.c @@ -1,3 +1,21 @@ +/* + * jffs2 on-disk structure generator for mtd + * + * Copyright (C) 2008 Felix Fietkau + * + * 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 + */ #include #include #include @@ -7,21 +25,26 @@ #include #include #include +#include #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); @@ -65,7 +88,7 @@ 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; @@ -97,7 +120,7 @@ static int add_dirent(char *name, char type, int parent) 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; @@ -128,13 +151,13 @@ static int add_dir(char *name, int parent) 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); @@ -147,7 +170,7 @@ static void add_file(char *name, int parent) else fname = name; - inode = add_dirent(name, IFTODT(S_IFREG), parent); + inode = add_dirent(fname, IFTODT(S_IFREG), parent); memset(&ri, 0, sizeof(ri)); ri.magic = JFFS2_MAGIC_BITMASK; ri.nodetype = JFFS2_NODETYPE_INODE; @@ -163,7 +186,7 @@ static void add_file(char *name, int parent) ri.usercompr = 0; fd = open(name, 0); - if (fd <= 0) { + if (fd < 0) { fprintf(stderr, "File %s does not exist\n", name); return; } @@ -204,14 +227,62 @@ static void add_file(char *name, int parent) 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); + +#ifdef target_brcm + trx_fixup(outfd, mtd); +#endif + return 0; +} + +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) @@ -223,11 +294,13 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir) goto done; } + if (!*dir) + target_ino = 1; + /* parse the structure of the jffs2 first * 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; @@ -245,27 +318,7 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir) 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 ((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) { @@ -294,6 +347,10 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir) err = 0; +#ifdef target_brcm + trx_fixup(outfd, mtd); +#endif + done: close(outfd); if (buf)