Btrfs: Add some extra debugging around file data checksum failures

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 614176e52851..3ebbc058d082 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -261,6 +261,10 @@ 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", inode->i_ino, offset);
+        }
+
         write_extent_buffer(leaf, &csum_result, (unsigned long)item,
                             BTRFS_CRC32_SIZE);
         btrfs_mark_buffer_dirty(path->nodes[0]);