Copied from https://btrfs.wiki.kernel.org/index.php/Mount_options .
Signed-off-by: David Sterba <dsterba@suse.com>
options please refer to `mount`(8) manpage. The options are sorted alphabetically
(discarding the 'no' prefix).
+NOTE: most mount options apply to the whole filesystem and only options in the
+first mounted subvolume will take effect. This is due to lack of implementation
+and may change in the future. This means that (for example) you can't set
+per-subvolume 'nodatacow', 'nodatasum', or 'compress' using mount options. This
+should eventually be fixed, but it has proved to be difficult to implement
+correctly within the Linux VFS framework.
+
*acl*::
*noacl*::
(default: on)