Defined in 3 files as a macro:

• include/uapi/linux/tcp.h, line 120 (as a macro)
• tools/include/uapi/linux/tcp.h, line 117 (as a macro)
• tools/testing/selftests/bpf/progs/bpf_tracing_net.h, line 57 (as a macro)

Referenced in 8 files:

• net/core/filter.c, line 5586
• net/ipv4/tcp.c
  • line 4047
  • line 4704
• net/mptcp/sockopt.c, line 567
• samples/bpf/tcp_tos_reflect_kern.c, line 42
• tools/testing/selftests/bpf/progs/setget_sockopt.c, line 352
• tools/testing/selftests/bpf/progs/test_misc_tcp_hdr_options.c, line 313
• tools/testing/selftests/bpf/progs/test_tcp_hdr_options.c, line 601
• tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c, line 143