The L_ZEROSTATS ioctl clears per-link statistics in the LLC2 and LAPB drivers.
/* Ioctl block for L_ZEROSTATS ioctl */ struct ll_hdioc { uint8 lli_type; /* Table type = LI_PLAIN */ uint8 lli_spare[3]; /* (for alignment) */ uint32 lli_ppa; /* PPA (0xff for all links) */ };