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authorFelix Fietkau <nbd@openwrt.org>2008-08-08 22:43:19 +0000
committerFelix Fietkau <nbd@openwrt.org>2008-08-08 22:43:19 +0000
commit753e5b492d6f220b28c9d07b142783cd75216f36 (patch)
tree276aadb29be3f61d9413c97eb8550881978c5a7c /package/mtd/src/mtd.c
parente71cdf8127b31e8edbdfb6041a915fe2a7e8776d (diff)
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add support for appending a file to jffs2 during reflash on the fly
SVN-Revision: 12250
Diffstat (limited to 'package/mtd/src/mtd.c')
-rw-r--r--package/mtd/src/mtd.c75
1 files changed, 49 insertions, 26 deletions
diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c
index f3a13ef..027c859 100644
--- a/package/mtd/src/mtd.c
+++ b/package/mtd/src/mtd.c
@@ -43,11 +43,10 @@
#include <sys/stat.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
-
#include "mtd-api.h"
+#include "mtd.h"
#define TRX_MAGIC 0x30524448 /* "HDR0" */
-#define BUFSIZE (16 * 1024)
#define MAX_ARGS 8
#define DEBUG
@@ -66,9 +65,10 @@ struct trx_header {
uint32_t offsets[3]; /* Offsets of partitions from start of header */
};
-static char buf[BUFSIZE];
-static char *imagefile;
-static int buflen;
+static char *buf = NULL;
+static char *imagefile = NULL;
+static char *jffs2file = NULL, *jffs2dir = JFFS2_DEFAULT_DIR;
+static int buflen = 0;
int quiet;
int mtdsize = 0;
int erasesize = 0;
@@ -134,7 +134,7 @@ int mtd_erase_block(int fd, int offset)
}
}
-int mtd_write_buffer(int fd, char *buf, int offset, int length)
+int mtd_write_buffer(int fd, const char *buf, int offset, int length)
{
lseek(fd, offset, SEEK_SET);
write(fd, buf, length);
@@ -205,6 +205,9 @@ static int mtd_check(const char *mtd)
if (!fd)
return 0;
+ if (!buf)
+ buf = malloc(erasesize);
+
close(fd);
return 1;
}
@@ -316,15 +319,29 @@ mtd_write(int imagefd, const char *mtd)
for (;;) {
/* buffer may contain data already (from trx check) */
- r = buflen;
- r += read(imagefd, buf + buflen, BUFSIZE - buflen);
- w += r;
+ r = read(imagefd, buf + buflen, erasesize - buflen);
+ if (r < 0)
+ break;
- /* EOF */
- if (r <= 0) break;
+ buflen += r;
+
+ if (jffs2file) {
+ if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF)) == 0) {
+ if (!quiet)
+ fprintf(stderr, "\b\b\b ");
+ if (quiet < 2)
+ fprintf(stderr, "\nAppending jffs2 data to from %s to %s...", jffs2file, mtd);
+ /* got an EOF marker - this is the place to add some jffs2 data */
+ mtd_replace_jffs2(fd, e, jffs2file);
+ goto done;
+ }
+ /* no EOF marker, make sure we figure out the last inode number
+ * before appending some data */
+ mtd_parse_jffs2data(buf, jffs2dir);
+ }
/* need to erase the next block before writing data to it */
- while (w > e) {
+ while (w + buflen > e) {
if (!quiet)
fprintf(stderr, "\b\b\b[e]");
@@ -337,7 +354,7 @@ mtd_write(int imagefd, const char *mtd)
if (!quiet)
fprintf(stderr, "\b\b\b[w]");
- if ((result = write(fd, buf, r)) < r) {
+ if ((result = write(fd, buf, buflen)) < buflen) {
if (result < 0) {
fprintf(stderr, "Error writing image.\n");
exit(1);
@@ -346,12 +363,18 @@ mtd_write(int imagefd, const char *mtd)
exit(1);
}
}
-
+ w += buflen;
+
+ /* not enough data - eof */
+ if (buflen < erasesize)
+ break;
+
buflen = 0;
}
if (!quiet)
fprintf(stderr, "\b\b\b\b");
+done:
if (quiet < 2)
fprintf(stderr, "\n");
@@ -376,6 +399,7 @@ static void usage(void)
" -f force write without trx checks\n"
" -e <device> erase <device> before executing the command\n"
" -d <name> directory for jffs2write, defaults to \"tmp\"\n"
+ " -j <name> integrate <file> into jffs2 data when writing an image\n"
"\n"
"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
" mtd -r write linux.trx linux\n\n");
@@ -399,7 +423,6 @@ int main (int argc, char **argv)
{
int ch, i, boot, unlock, imagefd, force, unlocked;
char *erase[MAX_ARGS], *device;
- char *jffs2dir = JFFS2_DEFAULT_DIR;
enum {
CMD_ERASE,
CMD_WRITE,
@@ -414,7 +437,7 @@ int main (int argc, char **argv)
buflen = 0;
quiet = 0;
- while ((ch = getopt(argc, argv, "frqe:d:")) != -1)
+ while ((ch = getopt(argc, argv, "frqe:d:j:")) != -1)
switch (ch) {
case 'f':
force = 1;
@@ -422,6 +445,9 @@ int main (int argc, char **argv)
case 'r':
boot = 1;
break;
+ case 'j':
+ jffs2file = optarg;
+ break;
case 'q':
quiet++;
break;
@@ -470,17 +496,14 @@ int main (int argc, char **argv)
}
}
+ if (!mtd_check(device)) {
+ fprintf(stderr, "Can't open device for writing!\n");
+ exit(1);
+ }
/* check trx file before erasing or writing anything */
- if (!image_check(imagefd, device)) {
- if (!force) {
- fprintf(stderr, "Image check failed.\n");
- exit(1);
- }
- } else {
- if (!mtd_check(device)) {
- fprintf(stderr, "Can't open device for writing!\n");
- exit(1);
- }
+ if (!image_check(imagefd, device) && !force) {
+ fprintf(stderr, "Image check failed.\n");
+ exit(1);
}
} else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
cmd = CMD_JFFS2WRITE;