[Samba] creating a master share

[sharif islam]

I am trying to create  a master share that contains all the other
shares. I created a group that needs read+write permission to all the
other shares. However, rather than adding this group in each share
configuration, I was wondering if there is a way to overwrite the
permission.

I tried this but gave read-only access. Also in the linux level, I
don't have this master group as the owner. Any idea?

[master share]
        comment = All of WWW read/write access
        path = /www
        valid users = "@DOMAIN\My master group"
        write list =  "@DOMAIN\My master group"
        force group = "My Master group"
        read only = No
        create mask = 0775
        directory mask = 0775