One of our internal services started to use sk_msg program and currently
it used existing prog attach/detach2 as demonstrated in selftests.
But attach/detach of all other bpf programs are based on bpf_link.
Consistent attach/detach APIs for all programs will make things easy to
undersand and less error prone. So this patch added bpf_link
support for BPF_PROG_TYPE_SK_MSG.
I marked the patch as RFC as not all functionality are covered
by tests yet, e.g. update_prog(). Maybe somebody can suggest
an existing test which I can look into.
Or maybe some other tests need to be added as well.
Yonghong Song (5):
bpf: Add link support for sk_msg prog
libbpf: Refactor bpf_program_attach_fd()
libbpf: Add link support for BPF_PROG_TYPE_SK_MSG
bpftool: Add link dump support for BPF_LINK_TYPE_SK_MSG
selftests/bpf: Add some tests with new bpf_program__attach_sk_msg()
API
include/linux/bpf.h | 13 ++
include/uapi/linux/bpf.h | 5 +
kernel/bpf/syscall.c | 3 +
net/core/skmsg.c | 153 ++++++++++++++++++
net/core/sock_map.c | 6 +-
tools/bpf/bpftool/link.c | 8 +
tools/include/uapi/linux/bpf.h | 5 +
tools/lib/bpf/libbpf.c | 26 ++-
tools/lib/bpf/libbpf.h | 3 +
tools/lib/bpf/libbpf.map | 1 +
.../selftests/bpf/prog_tests/sockmap_basic.c | 27 ++++
.../selftests/bpf/prog_tests/sockmap_listen.c | 38 +++++
12 files changed, 279 insertions(+), 9 deletions(-)
--
2.43.0
