Why do you google for something if more then 70% of results is just crap? You have superb man pages available in system so use them first. It's very obvious why your command fail :
zfs set sharesmb=name=wonslung tank/nas/Wonslung Why do you have this ....sharesmb=name=wonslung..... ? Man page says this 'zfs set property=value filesystem|volume|snapshot ...' so in your case something like 'zfs set sharesmb=on tank/nas/Wonslung' -- This message posted from opensolaris.org