Repairing: implement invalid VBR checksum fix.

[android-x86/external-exfat.git] / libexfat / repair.c

diff --git a/libexfat/repair.c b/libexfat/repair.c
index 10ec865..a7222cd 100644 (file)
--- a/libexfat/repair.c
+++ b/libexfat/repair.c
@@ -59,3 +59,20 @@ bool exfat_ask_to_fix(const struct exfat* ef)
        }
        exfat_bug("invalid repair option value: %d", ef->repair);
 }
+
+bool exfat_fix_invalid_vbr_checksum(const struct exfat* ef, void* sector,
+               uint32_t vbr_checksum)
+{
+       size_t i;
+       off_t sector_size = SECTOR_SIZE(*ef->sb);
+
+       for (i = 0; i < sector_size / sizeof(vbr_checksum); i++)
+               ((le32_t*) sector)[i] = cpu_to_le32(vbr_checksum);
+       if (exfat_pwrite(ef->dev, sector, sector_size, 11 * sector_size) < 0)
+       {
+               exfat_error("failed to write correct VBR checksum");
+               return false;
+       }
+       exfat_errors_fixed++;
+       return true;
+}