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author | Daniel Dickinson <daniel@cshore.neomailbox.net> | 2010-12-26 04:18:08 +0000 |
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committer | Daniel Dickinson <daniel@cshore.neomailbox.net> | 2010-12-26 04:18:08 +0000 |
commit | 934de91827ceadf6c3cee70503b8c3b7ed9cfdf6 (patch) | |
tree | 2792b3be1a430936ce94c8ddc34102815ed0f512 /package/mtd/src/imagetag.c | |
parent | dda75774e9b94c0ca362b1447fc4176823f269da (diff) | |
download | upstream-934de91827ceadf6c3cee70503b8c3b7ed9cfdf6.tar.gz upstream-934de91827ceadf6c3cee70503b8c3b7ed9cfdf6.tar.bz2 upstream-934de91827ceadf6c3cee70503b8c3b7ed9cfdf6.zip |
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>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24837 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/mtd/src/imagetag.c')
-rw-r--r-- | package/mtd/src/imagetag.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/package/mtd/src/imagetag.c b/package/mtd/src/imagetag.c index 71d88ea1a4..2080128c17 100644 --- a/package/mtd/src/imagetag.c +++ b/package/mtd/src/imagetag.c @@ -78,6 +78,77 @@ uint32_t compute_crc32(uint32_t crc, off_t start, size_t compute_len, int fd) } int +trx_fixup(int fd, const char *name) +{ + struct mtd_info_user mtdInfo; + unsigned long len; + void *ptr, *scan; + int bfd; + struct bcm_tag *tag; + ssize_t res; + uint32_t cfelen, imagelen, imagestart, rootfslen; + uint32_t imagecrc, rootfscrc, headercrc; + uint32_t offset = 0; + cfelen = imagelen = imagestart = imagecrc = rootfscrc = headercrc = rootfslen = 0; + + + if (ioctl(fd, MEMGETINFO, &mtdInfo) < 0) { + fprintf(stderr, "Failed to get mtd info\n"); + goto err; + } + + len = mtdInfo.size; + if (mtdInfo.size <= 0) { + fprintf(stderr, "Invalid MTD device size\n"); + goto err; + } + + bfd = mtd_open(name, true); + ptr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, bfd, 0); + if (!ptr || (ptr == (void *) -1)) { + perror("mmap"); + goto err1; + } + + tag = (struct bcm_tag *) (ptr); + + cfelen = strntoul(&tag->cfeLength[0], NULL, 10, IMAGE_LEN); + if (cfelen) { + fprintf(stderr, "Non-zero CFE length. This is currently unsupported.\n"); + exit(1); + } + + headercrc = compute_crc32(CRC_START, offset, offsetof(struct bcm_tag, headerCRC), fd); + if (headercrc != *(uint32_t *)(&tag->headerCRC[0])) { + fprintf(stderr, "Tag verify failed. This may not be a valid image.\n"); + exit(1); + } + + sprintf(&tag->rootLength[0], "%lu", 0); + strncpy(&tag->totalLength[0], &tag->kernelLength[0], IMAGE_LEN); + + imagestart = sizeof(tag); + memcpy(&tag->imageCRC[0], &tag->kernelCRC[0], CRC_LEN); + memcpy(&tag->fskernelCRC[0], &tag->kernelCRC[0], CRC_LEN); + rootfscrc = CRC_START; + memcpy(&tag->rootfsCRC[0], &rootfscrc, sizeof(uint32_t)); + headercrc = crc32(CRC_START, tag, offsetof(struct bcm_tag, headerCRC)); + memcpy(&tag->headerCRC[0], &headercrc, sizeof(uint32_t)); + + msync(ptr, sizeof(struct bcm_tag), MS_SYNC|MS_INVALIDATE); + munmap(ptr, len); + close(bfd); + return 0; + +err1: + close(bfd); +err: + fprintf(stderr, "Error fixing up imagetag header\n"); + return -1; +} + + +int trx_check(int imagefd, const char *mtd, char *buf, int *len) { struct bcm_tag *tag = (const struct bcm_tag *) buf; |