NTFS: Report unrepresentable inodes during ntfs_readdir() as KERN_WARNING

      messages and include the inode number.  Thanks to Yura Pakhuchiy for
      pointing this out.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

fs/ntfs/ChangeLog

@@ -48,6 +48,9 @@ ToDo/Notes:
 	- Remove two bogus BUG_ON()s from fs/ntfs/mft.c.
 	- Fix handling of valid but empty mapping pairs array in
 	  fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress().
+	- Report unrepresentable inodes during ntfs_readdir() as KERN_WARNING
+	  messages and include the inode number.  Thanks to Yura Pakhuchiy for
+	  pointing this out.
 
 2.1.23 - Implement extension of resident files and make writing safe as well as
 	 many bug fixes, cleanups, and enhancements...

fs/ntfs/dir.c

@@ -1051,7 +1051,8 @@ static inline int ntfs_filldir(ntfs_volume *vol, loff_t fpos,
 			ie->key.file_name.file_name_length, &name,
 			NTFS_MAX_NAME_LEN * NLS_MAX_CHARSET_SIZE + 1);
 	if (name_len <= 0) {
-		ntfs_debug("Skipping unrepresentable file.");
+		ntfs_warning(vol->sb, "Skipping unrepresentable inode 0x%llx.",
+				(long long)MREF_LE(ie->data.dir.indexed_file));
 		return 0;
 	}
 	if (ie->key.file_name.file_attributes &

fs/ntfs/unistr.c

@@ -372,7 +372,8 @@ retry:			wc = nls->uni2char(le16_to_cpu(ins[i]), ns + o,
 	return -EINVAL;
 conversion_err:
 	ntfs_error(vol->sb, "Unicode name contains characters that cannot be "
-			"converted to character set %s.", nls->charset);
+			"converted to character set %s.  You might want to "
+			"try to use the mount option nls=utf8.", nls->charset);
 	if (ns != *outs)
 		kfree(ns);
 	if (wc != -ENAMETOOLONG)