btrfs: don't silently ignore unexpected extent type when replaying log

If there's an unexpected (invalid) extent type, we just silently ignore
it. This means a corruption or some bug somewhere, so instead return
-EUCLEAN to the caller, making log replay fail, and print an error message
with relevant information.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/tree-log.c

@@ -668,7 +668,10 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
 		extent_end = ALIGN(start + size,
 				   fs_info->sectorsize);
 	} else {
-		return 0;
+		btrfs_err(fs_info,
+		  "unexpected extent type=%d root=%llu inode=%llu offset=%llu",
+			  found_type, btrfs_root_id(root), key->objectid, key->offset);
+		return -EUCLEAN;
 	}
 
 	inode = read_one_inode(root, key->objectid);