This is a near duplicate of #24564, but has a slightly smaller scope.

We're using a CIFS filesystem and noticed that copying files *from* that filesystem to a local path with `shutil.copy2` does not work, but fails with an `OSError: [Errno 22] Invalid argument`.  This is because `copy2()` calls `copystat()` which contains

    try:
        names = os.listxattr(src, follow_symlinks=follow_symlinks)
    except OSError as e:
        if e.errno not in (errno.ENOTSUP, errno.ENODATA):
            raise

In our case with our CIFS mount, and in the NFS mounts mentioned in #24564, `os.listxattr()` raises an IOError with `errno.EINVAL` (22).  It was proposed in #24564 already to also ignore EINVAL, but with this issue I wanted to specifically propose to do so for the *reading* part.  While I also think that copy2() should work with both source *and* target filesystems not supporting xattr, our use case where the likelihood of data loss is zero (because there have never been xattr in the first place) is particularly annoying.

This seems fixed, can it be closed?