mtd: Added trx_fixup for brcm63xx imagetag, and made references to fix_trx use the weak reference rather than the brcm47xx ifdef. This fixes a bug in which sysupgrade failed due to changing bad CRC on reboot.
Signed-off-by: Daniel Dickinson <daniel@cshore.neomailbox.net> SVN-Revision: 24837
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6ee5411686
commit
b3bcc483b2
2 changed files with 77 additions and 6 deletions
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@ -77,6 +77,77 @@ uint32_t compute_crc32(uint32_t crc, off_t start, size_t compute_len, int fd)
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return crc;
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}
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int
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trx_fixup(int fd, const char *name)
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{
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struct mtd_info_user mtdInfo;
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unsigned long len;
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void *ptr, *scan;
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int bfd;
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struct bcm_tag *tag;
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ssize_t res;
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uint32_t cfelen, imagelen, imagestart, rootfslen;
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uint32_t imagecrc, rootfscrc, headercrc;
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uint32_t offset = 0;
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cfelen = imagelen = imagestart = imagecrc = rootfscrc = headercrc = rootfslen = 0;
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if (ioctl(fd, MEMGETINFO, &mtdInfo) < 0) {
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fprintf(stderr, "Failed to get mtd info\n");
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goto err;
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}
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len = mtdInfo.size;
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if (mtdInfo.size <= 0) {
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fprintf(stderr, "Invalid MTD device size\n");
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goto err;
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}
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bfd = mtd_open(name, true);
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ptr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, bfd, 0);
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if (!ptr || (ptr == (void *) -1)) {
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perror("mmap");
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goto err1;
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}
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tag = (struct bcm_tag *) (ptr);
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cfelen = strntoul(&tag->cfeLength[0], NULL, 10, IMAGE_LEN);
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if (cfelen) {
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fprintf(stderr, "Non-zero CFE length. This is currently unsupported.\n");
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exit(1);
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}
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headercrc = compute_crc32(CRC_START, offset, offsetof(struct bcm_tag, headerCRC), fd);
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if (headercrc != *(uint32_t *)(&tag->headerCRC[0])) {
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fprintf(stderr, "Tag verify failed. This may not be a valid image.\n");
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exit(1);
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}
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sprintf(&tag->rootLength[0], "%lu", 0);
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strncpy(&tag->totalLength[0], &tag->kernelLength[0], IMAGE_LEN);
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imagestart = sizeof(tag);
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memcpy(&tag->imageCRC[0], &tag->kernelCRC[0], CRC_LEN);
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memcpy(&tag->fskernelCRC[0], &tag->kernelCRC[0], CRC_LEN);
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rootfscrc = CRC_START;
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memcpy(&tag->rootfsCRC[0], &rootfscrc, sizeof(uint32_t));
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headercrc = crc32(CRC_START, tag, offsetof(struct bcm_tag, headerCRC));
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memcpy(&tag->headerCRC[0], &headercrc, sizeof(uint32_t));
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msync(ptr, sizeof(struct bcm_tag), MS_SYNC|MS_INVALIDATE);
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munmap(ptr, len);
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close(bfd);
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return 0;
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err1:
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close(bfd);
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err:
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fprintf(stderr, "Error fixing up imagetag header\n");
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return -1;
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}
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int
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trx_check(int imagefd, const char *mtd, char *buf, int *len)
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{
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@ -244,9 +244,9 @@ int mtd_replace_jffs2(const char *mtd, int fd, int ofs, const char *filename)
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pad(erasesize);
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free(buf);
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#ifdef target_brcm
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trx_fixup(outfd, mtd);
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#endif
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if (trx_fixup) {
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trx_fixup(outfd, mtd);
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}
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return (mtdofs - ofs);
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}
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@ -347,9 +347,9 @@ int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir)
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err = 0;
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#ifdef target_brcm
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trx_fixup(outfd, mtd);
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#endif
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if (trx_fixup) {
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trx_fixup(outfd, mtd);
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}
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done:
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close(outfd);
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