What is in the A320 Smoke and Fume checklist?
I'm resuming this old question because no answer was given.
It depends on where the smoke is detected (if automatically detected). The following abnormal procedures exist:

SMOKE FWD(AFT) CARGO SMOKE
SMOKE LAVATORY SMOKE
AVIONICS SMOKE
SMOKE/FUMES/AVNCS SMOKE + REMOVAL OF SMOKE/FUMES

The checklists 1, 2, 3 have the corresponding ECAM message automatically triggered when smoke is detected, while the checklist 4 is a long checklist which guides the pilot in identifying the source of the smoke and taking the necessary actions (and has no corresponding ECAM message).
Checklist 1 instructs the pilots to close the air isolation valve and discharge the agent(s).
Checklist 2 instructs the pilots to punch the guy smoking in the toilette contact the cabin crew.
Checklist 3 instructs the pilots to perform the relevant part of Checklist 4.