Add some extra debugging around file data checksum failures

diff --git a/file-item.c b/file-item.c
index 2639901..8b85f7a 100644 (file)
--- a/file-item.c
+++ b/file-item.c
@@ -385,6 +385,11 @@ csum:
 found:
        csum_result = btrfs_csum_data(root, data, csum_result, len);
        btrfs_csum_final(csum_result, (char *)&csum_result);
+       if (csum_result == 0) {
+               printk("csum result is 0 for inode %Lu offset %Lu\n",
+                      objectid, offset);
+       }
+
        write_extent_buffer(leaf, &csum_result, (unsigned long)item,
                            BTRFS_CRC32_SIZE);
        btrfs_mark_buffer_dirty(path->nodes[0]);