jQuery Grid Plugin - jqGrid

I'm using jqgrid 3.5.3.

I want to create a custom formatter to display link so that I can set a url link "/abc.php?action=abc&id={id}&type={type}" and it will create a link to replace those {xx} with cell value. I found that I can only get cellvalue and rowid. The third parameter rowdata is actually not what it meant. I do a console.log(rowdata), it returns a string "add" but I have no clues on what it is. The only solution I found is to pass the grid id in formatoptions.

ColModel:
 {name:'id', index:'id', width:30, editable:false, formatter:'linkbtn', formatoptions:{url:'/abc.php?action=abc&id={id}&type={type}'}},

Formatter:
$.extend(true, $.fn.fmatter,{
        linkbtn: function(cellvalue, options, rowdata){
            var opt = options.colModel.formoptions;
            var url = (opt.url)?"#":opt.url.replace("{id}", options.rowId); //and what about other cell value??
            return '<a href="'+url+'" class="linkBtn">View</a>';
        }

}