use MEMGETBADBLOCK to look for bad blocks when reading MTD partitions (17a47098) · Commits · e / tools / etwrp

mtdutils/mtdutils.c

+12 −5

Original line number	Diff line number	Diff line
		@@ -283,19 +283,26 @@ static int read_block(const MtdPartition partition, int fd, char data)
		return -1;
		}

		off_t pos = lseek(fd, 0, SEEK_CUR);
		loff_t pos = lseek64(fd, 0, SEEK_CUR);

		ssize_t size = partition->erase_size;
		int mgbb;

		while (pos + size <= (int) partition->size) {
		if (lseek(fd, pos, SEEK_SET) != pos \|\| read(fd, data, size) != size) {
		fprintf(stderr, "mtd: read error at 0x%08lx (%s)\n",
		if (lseek64(fd, pos, SEEK_SET) != pos \|\| read(fd, data, size) != size) {
		fprintf(stderr, "mtd: read error at 0x%08llx (%s)\n",
		pos, strerror(errno));
		} else if (ioctl(fd, ECCGETSTATS, &after)) {
		fprintf(stderr, "mtd: ECCGETSTATS error (%s)\n", strerror(errno));
		return -1;
		} else if (after.failed != before.failed) {
		fprintf(stderr, "mtd: ECC errors (%d soft, %d hard) at 0x%08lx\n",
		fprintf(stderr, "mtd: ECC errors (%d soft, %d hard) at 0x%08llx\n",
		after.corrected - before.corrected,
		after.failed - before.failed, pos);
		} else if ((mgbb = ioctl(fd, MEMGETBADBLOCK, &pos))) {
		fprintf(stderr,
		"mtd: MEMGETBADBLOCK returned %d at 0x%08llx (errno=%d)\n",
		mgbb, pos, errno);
		} else {
		int i;
		for (i = 0; i < size; ++i) {
		@@ -303,7 +310,7 @@ static int read_block(const MtdPartition partition, int fd, char data)
		return 0; // Success!
		}
		}
		fprintf(stderr, "mtd: read all-zero block at 0x%08lx; skipping\n",
		fprintf(stderr, "mtd: read all-zero block at 0x%08llx; skipping\n",
		pos);
		}