X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/9b205741b6596954f537f3db9bbeb4f7db99adc6..2904117c6da9af2a09ff746edf58c70278022210:/package/mtd/src/mtd.c diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c index 752547656..b2d760e84 100644 --- a/package/mtd/src/mtd.c +++ b/package/mtd/src/mtd.c @@ -44,10 +44,23 @@ #include "mtd-api.h" #include "fis.h" #include "mtd.h" +#include "crc32.h" #define MAX_ARGS 8 #define JFFS2_DEFAULT_DIR "" /* directory name without /, empty means root dir */ +#if __BYTE_ORDER == __BIG_ENDIAN +#define STORE32_LE(X) ((((X) & 0x000000FF) << 24) | (((X) & 0x0000FF00) << 8) | (((X) & 0x00FF0000) >> 8) | (((X) & 0xFF000000) >> 24)) +#elif __BYTE_ORDER == __LITTLE_ENDIAN +#define STORE32_LE(X) (X) +#else +#error unkown endianness! +#endif + +ssize_t pread(int fd, void *buf, size_t count, off_t offset); +ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset); + +#define TRX_MAGIC 0x30524448 /* "HDR0" */ struct trx_header { uint32_t magic; /* "HDR0" */ uint32_t len; /* Length of file including header */ @@ -251,6 +264,82 @@ mtd_erase(const char *mtd) } +static int +mtd_fixtrx(const char *mtd, size_t offset) +{ + int fd; + struct trx_header *trx; + char *buf; + ssize_t res; + size_t block_offset; + + if (quiet < 2) + fprintf(stderr, "Trying to fix trx header in %s at 0x%x...\n", mtd, offset); + + block_offset = offset & ~(erasesize - 1); + offset -= block_offset; + + fd = mtd_check_open(mtd); + if(fd < 0) { + fprintf(stderr, "Could not open mtd device: %s\n", mtd); + exit(1); + } + + if (block_offset + erasesize > mtdsize) { + fprintf(stderr, "Offset too large, device size 0x%x\n", mtdsize); + exit(1); + } + + buf = malloc(erasesize); + if (!buf) { + perror("malloc"); + exit(1); + } + + res = pread(fd, buf, erasesize, block_offset); + if (res != erasesize) { + perror("pread"); + exit(1); + } + + trx = (struct trx_header *) (buf + offset); + if (trx->magic != STORE32_LE(0x30524448)) { + fprintf(stderr, "No trx magic found\n"); + exit(1); + } + + if (trx->len == STORE32_LE(erasesize - offset)) { + if (quiet < 2) + fprintf(stderr, "Header already fixed, exiting\n"); + close(fd); + return 0; + } + + trx->len = STORE32_LE(erasesize - offset); + + trx->crc32 = STORE32_LE(crc32buf((char*) &trx->flag_version, erasesize - offset - 3*4)); + if (mtd_erase_block(fd, block_offset)) { + fprintf(stderr, "Can't erease block at 0x%x (%s)\n", block_offset, strerror(errno)); + exit(1); + } + + if (quiet < 2) + fprintf(stderr, "New crc32: 0x%x, rewriting block\n", trx->crc32); + + if (pwrite(fd, buf, erasesize, block_offset) != erasesize) { + fprintf(stderr, "Error writing block (%s)\n", strerror(errno)); + exit(1); + } + + if (quiet < 2) + fprintf(stderr, "Done.\n"); + + close (fd); + sync(); + return 0; + +} + static int mtd_refresh(const char *mtd) { @@ -278,6 +367,16 @@ mtd_refresh(const char *mtd) return 0; } +static void +indicate_writing(const char *mtd) +{ + if (quiet < 2) + fprintf(stderr, "\nWriting from %s to %s ... ", imagefile, mtd); + + if (!quiet) + fprintf(stderr, " [ ]"); +} + static int mtd_write(int imagefd, const char *mtd, char *fis_layout) { @@ -285,6 +384,7 @@ mtd_write(int imagefd, const char *mtd, char *fis_layout) char *str = NULL; int fd, result; ssize_t r, w, e; + ssize_t skip = 0; uint32_t offset = 0; #ifdef FIS_SUPPORT @@ -362,13 +462,9 @@ resume: exit(1); } - if (quiet < 2) - fprintf(stderr, "Writing from %s to %s ... ", imagefile, mtd); + indicate_writing(mtd); w = e = 0; - if (!quiet) - fprintf(stderr, " [ ]"); - for (;;) { /* buffer may contain data already (from trx check or last mtd partition write attempt) */ while (buflen < erasesize) { @@ -391,6 +487,15 @@ resume: if (buflen == 0) break; + if (skip > 0) { + skip -= buflen; + buflen = 0; + if (skip <= 0) + indicate_writing(mtd); + + continue; + } + if (jffs2file) { if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) { if (!quiet) @@ -398,8 +503,14 @@ resume: if (quiet < 2) fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd); /* got an EOF marker - this is the place to add some jffs2 data */ - mtd_replace_jffs2(mtd, fd, e, jffs2file); - goto done; + skip = mtd_replace_jffs2(mtd, fd, e, jffs2file); + + w += skip; + e += skip; + skip -= buflen; + buflen = 0; + offset = 0; + continue; } /* no EOF marker, make sure we figure out the last inode number * before appending some data */ @@ -480,6 +591,7 @@ static void usage(void) " erase erase all data on device\n" " write |- write (use - for stdin) to device\n" " jffs2write append to the jffs2 partition on the device\n" + " fixtrx fix the checksum in a trx header on first boot\n" "Following options are available:\n" " -q quiet mode (once: no [w] on writing,\n" " twice: no status messages)\n" @@ -488,6 +600,7 @@ static void usage(void) " -e erase before executing the command\n" " -d directory for jffs2write, defaults to \"tmp\"\n" " -j integrate into jffs2 data when writing an image\n" + " -o offset offset of the trx header in the partition (for fixtrx)\n" #ifdef FIS_SUPPORT " -F [:[:]][,...]\n" " alter the fis partition table to create new partitions replacing\n" @@ -518,12 +631,14 @@ int main (int argc, char **argv) int ch, i, boot, imagefd = 0, force, unlocked; char *erase[MAX_ARGS], *device = NULL; char *fis_layout = NULL; + size_t offset = 0; enum { CMD_ERASE, CMD_WRITE, CMD_UNLOCK, CMD_REFRESH, - CMD_JFFS2WRITE + CMD_JFFS2WRITE, + CMD_FIXTRX, } cmd = -1; erase[0] = NULL; @@ -536,7 +651,7 @@ int main (int argc, char **argv) #ifdef FIS_SUPPORT "F:" #endif - "frqe:d:j:")) != -1) + "frqe:d:j:o:")) != -1) switch (ch) { case 'f': force = 1; @@ -561,6 +676,14 @@ int main (int argc, char **argv) case 'd': jffs2dir = optarg; break; + case 'o': + errno = 0; + offset = strtoul(optarg, 0, 0); + if (errno) { + fprintf(stderr, "-o: illegal numeric string\n"); + usage(); + } + break; #ifdef FIS_SUPPORT case 'F': fis_layout = optarg; @@ -585,6 +708,9 @@ int main (int argc, char **argv) } else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) { cmd = CMD_ERASE; device = argv[1]; + } else if ((strcmp(argv[0], "fixtrx") == 0) && (argc == 2)) { + cmd = CMD_FIXTRX; + device = argv[1]; } else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) { cmd = CMD_WRITE; device = argv[2]; @@ -657,6 +783,9 @@ int main (int argc, char **argv) case CMD_REFRESH: mtd_refresh(device); break; + case CMD_FIXTRX: + mtd_fixtrx(device, offset); + break; } sync();