This patch set adds BPF access to mptcp_sock structures, along with associated self tests. You may recognize some of the code from earlier (https://lore.kernel.org/bpf/20200918121046.190240-6-nicolas.rybowski@xxxxxxxxxxxx/) but it has been reworked quite a bit. v1 -> v2: Emit BTF type, add func_id checks in verifier.c and bpf_trace.c, remove build check for CONFIG_BPF_JIT, add selftest check for CONFIG_MPTCP, and add a patch to include CONFIG_IKCONFIG/CONFIG_IKCONFIG_PROC for the BPF self tests. v2 -> v3: Access sysctl through the filesystem to work around CI use of the more limited busybox sysctl command. v3 -> v4: Dropped special case kernel code for tcp_sock is_mptcp, use existing bpf_tcp_helpers.h, and add check for 'ip mptcp monitor' support. v4 -> v5: Use BPF test skeleton, more consistent use of ASSERT macros, drop some unnecessary parameters / checks, and use tracing to acquire MPTCP token. Geliang Tang (6): bpf: add bpf_skc_to_mptcp_sock_proto selftests/bpf: Enable CONFIG_IKCONFIG_PROC in config selftests/bpf: test bpf_skc_to_mptcp_sock selftests/bpf: verify token of struct mptcp_sock selftests/bpf: verify ca_name of struct mptcp_sock selftests/bpf: verify first of struct mptcp_sock Nicolas Rybowski (1): selftests/bpf: add MPTCP test base MAINTAINERS | 1 + include/linux/bpf.h | 1 + include/linux/btf_ids.h | 3 +- include/net/mptcp.h | 6 + include/uapi/linux/bpf.h | 7 + kernel/bpf/verifier.c | 1 + kernel/trace/bpf_trace.c | 2 + net/core/filter.c | 18 ++ net/mptcp/Makefile | 2 + net/mptcp/bpf.c | 21 +++ scripts/bpf_doc.py | 2 + tools/include/uapi/linux/bpf.h | 7 + tools/testing/selftests/bpf/bpf_tcp_helpers.h | 13 ++ tools/testing/selftests/bpf/config | 3 + tools/testing/selftests/bpf/network_helpers.c | 40 +++- tools/testing/selftests/bpf/network_helpers.h | 2 + .../testing/selftests/bpf/prog_tests/mptcp.c | 174 ++++++++++++++++++ .../testing/selftests/bpf/progs/mptcp_sock.c | 89 +++++++++ 18 files changed, 382 insertions(+), 10 deletions(-) create mode 100644 net/mptcp/bpf.c create mode 100644 tools/testing/selftests/bpf/prog_tests/mptcp.c create mode 100644 tools/testing/selftests/bpf/progs/mptcp_sock.c base-commit: 834650b50ed283d9d34a32b425d668256bf2e487 -- 2.36.1
