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. Based on comments from
previous RFC patch, I added BPF_PROG_TYPE_SK_SKB support as well
as both program types have similar treatment w.r.t. bpf_link
handling.
For the patch series, patch 1 added kernel support. Patches 2/3
added libbpf support. Patch 4 added bpftool support and
patches 5/6 added some new tests.
Yonghong Song (6):
bpf: Add bpf_link support for sk_msg and sk_skb progs
libbpf: Add new sec_def "sk_skb/verdict"
libbpf: Add bpf_link support for BPF_PROG_TYPE_SK_{MSG,SKB}
bpftool: Add link dump support for BPF_LINK_TYPE_SK_{MSG,SKB}
selftests/bpf: Refactor out helper functions for a few tests
selftests/bpf: Add some tests with new
bpf_program__attach_sk_{msg,skb}() APIs
include/linux/bpf.h | 13 ++
include/uapi/linux/bpf.h | 10 ++
kernel/bpf/syscall.c | 4 +
net/core/skmsg.c | 164 ++++++++++++++++++
net/core/sock_map.c | 6 +-
tools/bpf/bpftool/link.c | 18 ++
tools/include/uapi/linux/bpf.h | 10 ++
tools/lib/bpf/libbpf.c | 15 ++
tools/lib/bpf/libbpf.h | 4 +
tools/lib/bpf/libbpf.map | 2 +
.../selftests/bpf/prog_tests/sockmap_basic.c | 121 +++++++++++--
.../selftests/bpf/prog_tests/sockmap_listen.c | 38 ++++
.../bpf/progs/test_skmsg_load_helpers.c | 15 +-
.../bpf/progs/test_sockmap_pass_prog.c | 11 +-
.../progs/test_sockmap_skb_verdict_attach.c | 2 +-
15 files changed, 410 insertions(+), 23 deletions(-)
--
2.43.0
