This series adds __sk_buff->sk, "struct bpf_tcp_sock",
BPF_FUNC_sk_fullsock and BPF_FUNC_tcp_sock. Together, they provide
a common way to expose the members of "struct tcp_sock" and
"struct bpf_sock" for the bpf_prog to access.
The patch series first adds a bpf_sock pointer to __sk_buff
and a new helper BPF_FUNC_sk_fullsock.
It then adds BPF_FUNC_tcp_sock to get a bpf_tcp_sock
pointer from a bpf_sock pointer.
The current use case is to allow a cg_skb_bpf_prog to provide
per cgroup traffic policing/shaping.
Please see individual patch for details.
Martin KaFai Lau (6):
bpf: Add a bpf_sock pointer to __sk_buff and a bpf_sk_fullsock helper
bpf: Refactor sock_ops_convert_ctx_access
bpf: Add struct bpf_tcp_sock and BPF_FUNC_tcp_sock
bpf: Sync bpf.h to tools/
bpf: Add skb->sk, bpf_sk_fullsock and bpf_tcp_sock tests to
test_verifer
bpf: Add test_sock_fields for skb->sk and bpf_tcp_sock
include/linux/bpf.h | 42 ++
include/uapi/linux/bpf.h | 61 ++-
kernel/bpf/verifier.c | 156 +++++--
net/core/filter.c | 407 +++++++++++-------
tools/include/uapi/linux/bpf.h | 61 ++-
tools/testing/selftests/bpf/Makefile | 5 +-
tools/testing/selftests/bpf/bpf_helpers.h | 4 +
.../testing/selftests/bpf/test_sock_fields.c | 314 ++++++++++++++
.../selftests/bpf/test_sock_fields_kern.c | 145 +++++++
.../selftests/bpf/verifier/ref_tracking.c | 4 +-
tools/testing/selftests/bpf/verifier/sock.c | 238 ++++++++++
tools/testing/selftests/bpf/verifier/unpriv.c | 2 +-
12 files changed, 1233 insertions(+), 206 deletions(-)
create mode 100644 tools/testing/selftests/bpf/test_sock_fields.c
create mode 100644 tools/testing/selftests/bpf/test_sock_fields_kern.c
create mode 100644 tools/testing/selftests/bpf/verifier/sock.c
--
2.17.1
