mirror of https://github.com/hak5/openwrt.git
add support for appending a file to jffs2 during reflash on the fly
SVN-Revision: 12250lede-17.01
Felix Fietkau
parent
e71cdf8127
commit
753e5b492d
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@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
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include $(INCLUDE_DIR)/kernel.mk
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PKG_NAME:=mtd
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PKG_RELEASE:=6
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PKG_RELEASE:=7
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PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)
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@ -14,7 +14,6 @@
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#define PAD(x) (((x)+3)&~3)
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#define CLEANMARKER "\x85\x19\x03\x20\x0c\x00\x00\x00\xb1\xb0\x1e\xe4"
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#define JFFS2_EOF "\xde\xad\xc0\xde"
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static int last_ino = 0;
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static int last_version = 0;
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@ -22,6 +21,7 @@ static char *buf = NULL;
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static int ofs = 0;
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static int outfd = 0;
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static int mtdofs = 0;
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static int target_ino = 0;
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static void prep_eraseblock(void);
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@ -65,7 +65,7 @@ static void prep_eraseblock(void)
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add_data(CLEANMARKER, sizeof(CLEANMARKER) - 1);
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}
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static int add_dirent(char *name, char type, int parent)
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static int add_dirent(const char *name, const char type, int parent)
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{
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struct jffs2_raw_dirent *de;
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@ -97,7 +97,7 @@ static int add_dirent(char *name, char type, int parent)
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return de->ino;
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}
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static int add_dir(char *name, int parent)
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static int add_dir(const char *name, int parent)
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{
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struct jffs2_raw_inode ri;
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int inode;
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@ -128,12 +128,13 @@ static int add_dir(char *name, int parent)
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return inode;
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}
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static void add_file(char *name, int parent)
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static void add_file(const char *name, int parent)
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{
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int inode, f_offset = 0, fd;
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struct jffs2_raw_inode ri;
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struct stat st;
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char wbuf[4096], *fname;
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char wbuf[4096];
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const char *fname;
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FILE *f;
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if (stat(name, &st)) {
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@ -204,9 +205,53 @@ static void add_file(char *name, int parent)
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close(fd);
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}
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int mtd_write_jffs2(char *mtd, char *filename, char *dir)
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int mtd_replace_jffs2(int fd, int ofs, const char *filename)
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{
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outfd = fd;
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mtdofs = ofs;
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buf = malloc(erasesize);
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target_ino = 1;
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if (!last_ino)
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last_ino = 1;
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add_file(filename, target_ino);
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pad(erasesize);
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/* add eof marker, pad to eraseblock size and write the data */
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add_data(JFFS2_EOF, sizeof(JFFS2_EOF) - 1);
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pad(erasesize);
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free(buf);
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}
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void mtd_parse_jffs2data(const char *buf, const char *dir)
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{
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struct jffs2_unknown_node *node = (struct jffs2_unknown_node *) buf;
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unsigned int ofs = 0;
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while (ofs < erasesize) {
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node = (struct jffs2_unknown_node *) (buf + ofs);
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if (node->magic != 0x1985)
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break;
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ofs += PAD(node->totlen);
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if (node->nodetype == JFFS2_NODETYPE_DIRENT) {
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struct jffs2_raw_dirent *de = (struct jffs2_raw_dirent *) node;
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/* is this the right directory name and is it a subdirectory of / */
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if (*dir && (de->pino == 1) && !strncmp(de->name, dir, de->nsize))
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target_ino = de->ino;
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/* store the last inode and version numbers for adding extra files */
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if (last_ino < de->ino)
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last_ino = de->ino;
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if (last_version < de->version)
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last_version = de->version;
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}
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}
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}
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int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir)
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{
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int target_ino = 0;
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int err = -1, fdeof = 0;
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off_t offset;
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@ -230,7 +275,6 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir)
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* locate the directory that the file is going to be placed in */
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for(;;) {
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struct jffs2_unknown_node *node = (struct jffs2_unknown_node *) buf;
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unsigned int ofs = 0;
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if (read(outfd, buf, erasesize) != erasesize) {
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fdeof = 1;
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@ -248,27 +292,7 @@ int mtd_write_jffs2(char *mtd, char *filename, char *dir)
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if (node->magic != 0x1985)
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break;
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while (ofs < erasesize) {
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node = (struct jffs2_unknown_node *) (buf + ofs);
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if (node->magic == 0x1985) {
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ofs += PAD(node->totlen);
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if (node->nodetype == JFFS2_NODETYPE_DIRENT) {
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struct jffs2_raw_dirent *de = (struct jffs2_raw_dirent *) node;
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/* is this the right directory name and is it a subdirectory of / */
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if (*dir && (de->pino == 1) && !strncmp(de->name, dir, de->nsize))
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target_ino = de->ino;
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/* store the last inode and version numbers for adding extra files */
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if (last_ino < de->ino)
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last_ino = de->ino;
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if (last_version < de->version)
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last_version = de->version;
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}
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} else {
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ofs = ~0;
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}
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}
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mtd_parse_jffs2data(buf, dir);
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}
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if (fdeof) {
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@ -43,11 +43,10 @@
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#include <sys/stat.h>
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#include <sys/reboot.h>
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#include <linux/reboot.h>
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#include "mtd-api.h"
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#include "mtd.h"
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#define TRX_MAGIC 0x30524448 /* "HDR0" */
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#define BUFSIZE (16 * 1024)
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#define MAX_ARGS 8
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#define DEBUG
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@ -66,9 +65,10 @@ struct trx_header {
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uint32_t offsets[3]; /* Offsets of partitions from start of header */
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};
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static char buf[BUFSIZE];
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static char *imagefile;
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static int buflen;
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static char *buf = NULL;
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static char *imagefile = NULL;
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static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
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static int buflen = 0;
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int quiet;
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int mtdsize = 0;
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int erasesize = 0;
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@ -134,7 +134,7 @@ int mtd_erase_block(int fd, int offset)
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}
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}
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int mtd_write_buffer(int fd, char *buf, int offset, int length)
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int mtd_write_buffer(int fd, const char *buf, int offset, int length)
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{
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lseek(fd, offset, SEEK_SET);
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write(fd, buf, length);
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@ -205,6 +205,9 @@ static int mtd_check(const char *mtd)
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if (!fd)
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return 0;
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if (!buf)
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buf = malloc(erasesize);
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close(fd);
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return 1;
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}
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@ -316,15 +319,29 @@ mtd_write(int imagefd, const char *mtd)
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for (;;) {
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/* buffer may contain data already (from trx check) */
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r = buflen;
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r += read(imagefd, buf + buflen, BUFSIZE - buflen);
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w += r;
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r = read(imagefd, buf + buflen, erasesize - buflen);
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if (r < 0)
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break;
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/* EOF */
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if (r <= 0) break;
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buflen += r;
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if (jffs2file) {
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if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF)) == 0) {
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if (!quiet)
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fprintf(stderr, "\b\b\b ");
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if (quiet < 2)
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fprintf(stderr, "\nAppending jffs2 data to from %s to %s...", jffs2file, mtd);
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/* got an EOF marker - this is the place to add some jffs2 data */
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mtd_replace_jffs2(fd, e, jffs2file);
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goto done;
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}
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/* no EOF marker, make sure we figure out the last inode number
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* before appending some data */
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mtd_parse_jffs2data(buf, jffs2dir);
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}
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/* need to erase the next block before writing data to it */
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while (w > e) {
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while (w + buflen > e) {
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if (!quiet)
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fprintf(stderr, "\b\b\b[e]");
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@ -337,7 +354,7 @@ mtd_write(int imagefd, const char *mtd)
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if (!quiet)
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fprintf(stderr, "\b\b\b[w]");
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if ((result = write(fd, buf, r)) < r) {
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if ((result = write(fd, buf, buflen)) < buflen) {
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if (result < 0) {
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fprintf(stderr, "Error writing image.\n");
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exit(1);
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@ -346,12 +363,18 @@ mtd_write(int imagefd, const char *mtd)
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exit(1);
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}
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}
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w += buflen;
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/* not enough data - eof */
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if (buflen < erasesize)
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break;
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buflen = 0;
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}
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if (!quiet)
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fprintf(stderr, "\b\b\b\b");
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done:
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if (quiet < 2)
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fprintf(stderr, "\n");
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@ -376,6 +399,7 @@ static void usage(void)
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" -f force write without trx checks\n"
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" -e <device> erase <device> before executing the command\n"
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" -d <name> directory for jffs2write, defaults to \"tmp\"\n"
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" -j <name> integrate <file> into jffs2 data when writing an image\n"
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"\n"
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"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
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" mtd -r write linux.trx linux\n\n");
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@ -399,7 +423,6 @@ int main (int argc, char **argv)
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{
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int ch, i, boot, unlock, imagefd, force, unlocked;
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char *erase[MAX_ARGS], *device;
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char *jffs2dir = JFFS2_DEFAULT_DIR;
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enum {
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CMD_ERASE,
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CMD_WRITE,
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@ -414,7 +437,7 @@ int main (int argc, char **argv)
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buflen = 0;
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quiet = 0;
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while ((ch = getopt(argc, argv, "frqe:d:")) != -1)
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while ((ch = getopt(argc, argv, "frqe:d:j:")) != -1)
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switch (ch) {
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case 'f':
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force = 1;
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@ -422,6 +445,9 @@ int main (int argc, char **argv)
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case 'r':
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boot = 1;
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break;
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case 'j':
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jffs2file = optarg;
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break;
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case 'q':
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quiet++;
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break;
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@ -470,17 +496,14 @@ int main (int argc, char **argv)
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}
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}
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if (!mtd_check(device)) {
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fprintf(stderr, "Can't open device for writing!\n");
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exit(1);
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}
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/* check trx file before erasing or writing anything */
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if (!image_check(imagefd, device)) {
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if (!force) {
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fprintf(stderr, "Image check failed.\n");
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exit(1);
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}
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} else {
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if (!mtd_check(device)) {
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fprintf(stderr, "Can't open device for writing!\n");
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exit(1);
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}
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if (!image_check(imagefd, device) && !force) {
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fprintf(stderr, "Image check failed.\n");
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exit(1);
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}
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} else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
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cmd = CMD_JFFS2WRITE;
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@ -1,14 +1,18 @@
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#ifndef __mtd_h
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#define __mtd_h
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#define JFFS2_EOF "\xde\xad\xc0\xde"
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extern int quiet;
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extern int mtdsize;
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extern int erasesize;
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extern int mtd_open(const char *mtd);
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extern int mtd_check_open(char *mtd);
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extern int mtd_check_open(const char *mtd);
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extern int mtd_erase_block(int fd, int offset);
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extern int mtd_write_buffer(int fd, char *buf, int offset, int length);
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extern int mtd_write_jffs2(char *mtd, char *filename, char *dir);
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extern int mtd_write_buffer(int fd, const char *buf, int offset, int length);
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extern int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir);
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extern int mtd_replace_jffs2(int fd, int ofs, const char *filename);
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extern void mtd_parse_jffs2data(const char *buf, const char *dir);
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#endif /* __mtd_h */
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