Hi need some clarification of rules.

I have a level 12 (7 swashbuckler Rogue/5 Lycan Bloodhunter) character and we are about to head into an ambush to take down a major big bad.

I recently attuned to the Butchers Bib and was curious about it's first effect

*Once per turn when you rolI damage for a melee attack with a weapon, you can reroll the weapon's damage dice. If you do so, you must use the second total.

I have two wolverine claw weapons built into me (yes they go snikt when they come out, and yes it hurts every time I bring them out) they do 1d6 slashing and 2d6 fire damage. So if I were to use sneak attack and I roll badly on the weapon and sneak attack, could I reroll all of them or only the weapon damage? Does the sneak attack count as part of the weapon attack?

Just wanna clarify it before the next session in a weeks time.