fstype_open.bt

#!/usr/bin/bpftrace
#include <linux/fs.h>
#include <linux/mount.h>
kprobe:vfs_open {
        $path = (struct path *)arg0;
        $mnt = (struct vfsmount *)$path->mnt;
        $mnt_sb = (struct super_block *)$mnt->mnt_sb;
        $type = (struct file_system_type *)$mnt_sb->s_type;
        $fstype = $type->name;
        @open[str($type->name)] = count();
}