Macbook red disk

Hi all, it looks like messed up my mac.

I installed bootcamp, and accidentally deleted the mac's partition. I somehow got my macintosh system back by deleting bootcamp disk and installing os X on "bootcamp" disk.

Now here comes the problem.

My mac has 120 GB flash storage, but my disk's maximum storage is shown as "30 GB." I made bootcamp 30GB though.

So I tried to fix it, by repairing in disk utility. Then disk utility had red font saying "virtual whole disk."

What do I need to do to get my storage space back or repair it? 😟