Currently, we have BPF_CGROUP_INET_SOCK_CREATE hook that triggers on
socket creation and there is no way to know when the socket is being
closed. Add new set of hooks BPF_CGROUP_INET{4,6}_SOCK_RELEASE
that trigger when the socket is closed.
Initial intended usecase is to cleanup statistics after POST{4,6}_BIND.
Hooks have read-only access to all fields of struct bpf_sock.
First patch adds hooks, the rest of the patches add uapi and tests to make
sure these hooks work.
Stanislav Fomichev (5):
bpf: add BPF_CGROUP_INET{4,6}_SOCK_RELEASE hooks
tools: bpf: support BPF_CGROUP_INET{4,6}_SOCK_RELEASE in
libbpf/bpftool
selftests/bpf: add BPF_CGROUP_INET{4,6}_SOCK_RELEASE to
test_section_names.c
selftests/bpf: add BPF_CGROUP_INET{4,6}_SOCK_RELEASE to test_sock.c
selftests/bpf: add BPF_CGROUP_INET{4,6}_SOCK_RELEASE to
test_sock_addr.c
include/linux/bpf-cgroup.h | 6 +
include/net/inet_common.h | 1 +
include/uapi/linux/bpf.h | 2 +
kernel/bpf/syscall.c | 8 ++
net/core/filter.c | 7 +
net/ipv4/af_inet.c | 13 +-
net/ipv6/af_inet6.c | 5 +-
tools/bpf/bpftool/cgroup.c | 2 +
tools/include/uapi/linux/bpf.h | 2 +
tools/lib/bpf/libbpf.c | 4 +
.../selftests/bpf/test_section_names.c | 10 ++
tools/testing/selftests/bpf/test_sock.c | 119 ++++++++++++++++
tools/testing/selftests/bpf/test_sock_addr.c | 131 +++++++++++++++++-
13 files changed, 307 insertions(+), 3 deletions(-)
--
2.20.1.321.g9e740568ce-goog
