ext4: add warning to ext4_convert_unwritten_extents_endio

[firefly-linux-kernel-4.4.55.git] / fs / ext4 / extents.c

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 60818ed1f6a9b13a9da2dc375a84741d5f533650..265cb0e50c519bc02c54bb754f51c4a98622e49f 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3387,8 +3387,19 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
                "block %llu, max_blocks %u\n", inode->i_ino,
                  (unsigned long long)ee_block, ee_len);
 
-       /* If extent is larger than requested then split is required */
+       /* If extent is larger than requested it is a clear sign that we still
+        * have some extent state machine issues left. So extent_split is still
+        * required.
+        * TODO: Once all related issues will be fixed this situation should be
+        * illegal.
+        */
        if (ee_block != map->m_lblk || ee_len > map->m_len) {
+#ifdef EXT4_DEBUG
+               ext4_warning("Inode (%ld) finished: extent logical block %llu,"
+                            " len %u; IO logical block %llu, len %u\n",
+                            inode->i_ino, (unsigned long long)ee_block, ee_len,
+                            (unsigned long long)map->m_lblk, map->m_len);
+#endif
                err = ext4_split_unwritten_extents(handle, inode, map, path,
                                                   EXT4_GET_BLOCKS_CONVERT);
                if (err < 0)