socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000380)={<r0=>0xffffffffffffffff})
setsockopt$SO_TIMESTAMP(r0, 0x1, 0x40, &(0x7f0000000240)=0x1, 0x4)
getsockopt$SO_TIMESTAMPING(r0, 0x1, 0x41, 0x0, &(0x7f0000000040))