How to file for partition under Hindu law?

I wanted to know the laws while dividing the properties in joint Hindu family, as our family has some critical issues. My dad has three brothers in which two of them work as a joint family, my dad is the youngest brother so he is always put down, my dad's elder brother known as karta has different mind, all the properties and the bussiness done in the family are being done in my dad's elder brother sona name, so I wanted to known if we divide will my dad get the share of equal property which is in his son name?