On Tue, Oct 4, 2022 at 6:18 AM Roberto Sassu roberto.sassu@huaweicloud.com wrote:
From: Roberto Sassu roberto.sassu@huawei.com
NOTE: resending with libbpf_get_fd_opts test added to deny list for s390x.
it's not a resend if you change something in patches, it's a new version, please mark it appropriately with v2 instead of [RESEND]
Add the _opts variant for bpf_*_get_fd_by_id() functions, to be able to pass to the kernel more options, when requesting a fd of an eBPF object to the kernel.
Pass the options through a newly introduced structure, bpf_get_fd_opts, which currently contains open_flags (the other two members are for compatibility and for padding).
open_flags allows the caller to request specific permissions to access a map (e.g. read-only). This is useful for example in the situation where a map is write-protected.
Besides patches 2-6, which introduce the new variants and the data structure, patch 1 fixes the LIBBPF_1.0.0 declaration in libbpf.map.
Roberto Sassu (6): libbpf: Fix LIBBPF_1.0.0 declaration in libbpf.map libbpf: Define bpf_get_fd_opts and introduce bpf_map_get_fd_by_id_opts() libbpf: Introduce bpf_prog_get_fd_by_id_opts() libbpf: Introduce bpf_btf_get_fd_by_id_opts() libbpf: Introduce bpf_link_get_fd_by_id_opts() selftests/bpf: Add tests for _opts variants of bpf_*_get_fd_by_id()
tools/lib/bpf/bpf.c | 47 +++++++++- tools/lib/bpf/bpf.h | 16 ++++ tools/lib/bpf/libbpf.map | 6 +- tools/testing/selftests/bpf/DENYLIST.s390x | 1 + .../bpf/prog_tests/libbpf_get_fd_opts.c | 88 +++++++++++++++++++ .../bpf/progs/test_libbpf_get_fd_opts.c | 36 ++++++++ 6 files changed, 189 insertions(+), 5 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/libbpf_get_fd_opts.c create mode 100644 tools/testing/selftests/bpf/progs/test_libbpf_get_fd_opts.c
-- 2.25.1