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add jffs2root from whiterussian/

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SVN-Revision: 2255
This commit is contained in:
Felix Fietkau 2005-10-22 19:51:51 +00:00
parent b965972dd3
commit fb8995c621
2 changed files with 73 additions and 63 deletions
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2
openwrt/target/linux/package/openwrt/Makefile
View File

@ -3,7 +3,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME := base-files-arch
PKG_RELEASE := 1
PKG_RELEASE := 2
PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
include $(TOPDIR)/package/rules.mk

134
openwrt/target/linux/package/openwrt/jffs2root.c
View File

@ -36,88 +36,98 @@
#define FILENAME "/dev/mtdblock/1"
struct trx_header {
unsigned magic; /* "HDR0" */
unsigned len; /* Length of file including header */
unsigned crc32; /* 32-bit CRC from flag_version to end of file */
unsigned flag_version; /* 0:15 flags, 16:31 version */
unsigned offsets[3]; /* Offsets of partitions from start of header */
unsigned magic; /* "HDR0" */
unsigned len; /* Length of file including header */
unsigned crc32; /* 32-bit CRC from flag_version to end of file */
unsigned flag_version; /* 0:15 flags, 16:31 version */
unsigned offsets[3]; /* Offsets of partitions from start of header */
};
unsigned long *crc32;
void init_crc32()
{
unsigned long crc;
unsigned long poly = 0xEDB88320L;
int n, bit;
if ((crc32 = (unsigned long *) malloc(256 * sizeof(unsigned long))) == (void *)-1) {
perror("malloc");
exit(1);
}
for (n = 0; n < 256; n++) {
unsigned long crc;
unsigned long poly = 0xEDB88320L;
int n, bit;
if ((crc32 = (unsigned long *) malloc(256 * sizeof(unsigned long))) == (void *)-1) {
perror("malloc");
exit(1);
}
for (n = 0; n < 256; n++) {
crc = (unsigned long) n;
for (bit = 0; bit < 8; bit++)
crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1);
crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1);
crc32[n] = crc;
}
}
}
unsigned int crc32buf(char *buf, size_t len)
{
unsigned int crc = 0xFFFFFFFF;
for (; len; len--, buf++)
unsigned int crc = 0xFFFFFFFF;
for (; len; len--, buf++)
crc = crc32[(crc ^ *buf) & 0xff] ^ (crc >> 8);
return crc;
return crc;
}
int main(int argc, char **argv)
{
int fd;
struct mtd_info_user mtdInfo;
unsigned long len;
struct trx_header *ptr;
int fd;
struct mtd_info_user mtdInfo;
unsigned long len;
struct trx_header *ptr;
char *buf;
if (((fd = open(FILENAME, O_RDWR)) < 0)
|| ((len = lseek(fd, 0, SEEK_END)) < 0)
|| ((ptr = (struct trx_header *) mmap(0, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))
|| (ptr->magic != 0x30524448)) {
printf("Error reading trx info\n");
exit(-1);
}
close (fd);
if (((fd = open(FILENAME, O_RDWR)) < 0)
|| ((len = lseek(fd, 0, SEEK_END)) < 0)
|| ((ptr = (struct trx_header *) mmap(0, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))
|| (ptr->magic != 0x30524448)) {
printf("Error reading trx info\n");
exit(-1);
}
close (fd);
if (((fd = open("/dev/mtd/1", O_RDWR)) < 0)
|| (ioctl(fd, MEMGETINFO, &mtdInfo))) {
fprintf(stderr, "Could not get MTD device info from %s\n", FILENAME);
close(fd);
exit(1);
}
close(fd);
if (((fd = open("/dev/mtd/1", O_RDWR)) < 0)
|| (ioctl(fd, MEMGETINFO, &mtdInfo))) {
fprintf(stderr, "Could not get MTD device info from %s\n", FILENAME);
close(fd);
exit(1);
}
close(fd);
if (argc > 1 && !strcmp(argv[1],"--move")) {
if (ptr->offsets[2] >= ptr->len) {
printf("Partition already moved outside trx\n");
} else {
init_crc32();
ptr->offsets[2] += (mtdInfo.erasesize - 1);
ptr->offsets[2] &= ~(mtdInfo.erasesize - 1);
ptr->len = ptr->offsets[2];
ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
printf("Partition moved; please reboot\n");
}
} else {
int x;
printf(" erase: 0x%08x\n",mtdInfo.erasesize);
printf("=== trx ===\n");
printf("mapped: 0x%08x\n", (unsigned)ptr);
printf(" magic: 0x%08x\n", ptr->magic);
printf(" len: 0x%08x\n", ptr->len);
printf(" crc: 0x%08x\n", ptr->crc32);
for (x = 0; x < 3; x++)
printf(" offset[%d]: 0x%08x\n", x, ptr->offsets[x]);
}
if (argc > 1 && !strcmp(argv[1],"--move")) {
if (ptr->offsets[2] >= ptr->len) {
printf("Partition already moved outside trx\n");
} else {
init_crc32();
ptr->offsets[2] += (mtdInfo.erasesize - 1);
ptr->offsets[2] &= ~(mtdInfo.erasesize - 1);
ptr->len = ptr->offsets[2];
ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
printf("Partition moved; please reboot\n");
}
} else if (argc > 1 && !strcmp(argv[1], "--clean")) {
buf = (char *) ptr;
if (buf[ptr->offsets[1] - 1] == 0) {
init_crc32();
buf[ptr->offsets[1] - 1] = 1;
ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
printf("Partition marked as clean\n");
}
} else {
int x;
printf(" erase: 0x%08x\n",mtdInfo.erasesize);
printf("=== trx ===\n");
printf("mapped: 0x%08x\n", (unsigned)ptr);
printf(" magic: 0x%08x\n", ptr->magic);
printf(" len: 0x%08x\n", ptr->len);
printf(" crc: 0x%08x\n", ptr->crc32);
for (x = 0; x < 3; x++)
printf(" offset[%d]: 0x%08x\n", x, ptr->offsets[x]);
}
munmap((void *) ptr, len);
return 0;
munmap((void *) ptr, len);
return 0;
}