Symbol: SIOCSIFMTU
net/core/dev_ioctl.c
561
case SIOCSIFMTU: /* Set the MTU of a device */
net/core/dev_ioctl.c
794
case SIOCSIFMTU:
net/socket.c
3470
case SIOCSIFMTU:
tools/testing/selftests/net/ipv6_fragmentation.c
59
if (ioctl(ctl, SIOCSIFMTU, &ifr) == -1)