As part of the effort to move towards a v1.0 for libbpf [0], this set improves some confusing function names related to BTF loading from and to the kernel: - btf__load() becomes btf__load_into_kernel(). - btf__get_from_id becomes btf__load_from_kernel_by_id(). - A new version btf__load_from_kernel_by_id_split() extends the former to add support for split BTF. The old functions are marked for deprecation for the next minor version (0.6) of libbpf. The last patch is a trivial change to bpftool to add support for dumping split BTF objects by referencing them by their id (and not only by their BTF path). [0] https://github.com/libbpf/libbpf/wiki/Libbpf:-the-road-to-v1.0#btfh-apis v3: - Use libbpf_err_ptr() in btf__load_from_kernel_by_id(), ERR_PTR() in bpftool's get_map_kv_btf(). - Move the definition of btf__load_from_kernel_by_id() closer to the btf__parse() group in btf.h (move the legacy function with it). - Fix a bug on the return value in libbpf_find_prog_btf_id(), as a new patch. - Move the btf__free() fixes to their own patch. - Add "Fixes:" tags to relevant patches. - Re-introduce deprecation (removed in v2) for the legacy functions, as a new macro LIBBPF_DEPRECATED_SINCE(major, minor, message). v2: - Remove deprecation marking of legacy functions (patch 4/6 from v1). - Make btf__load_from_kernel_by_id{,_split}() return the btf struct, adjust surrounding code and call btf__free() when missing. - Add new functions to v0.5.0 API (and not v0.6.0). Quentin Monnet (8): libbpf: return non-null error on failures in libbpf_find_prog_btf_id() libbpf: rename btf__load() as btf__load_into_kernel() libbpf: rename btf__get_from_id() as btf__load_from_kernel_by_id() tools: free BTF objects at various locations tools: replace btf__get_from_id() with btf__load_from_kernel_by_id() libbpf: prepare deprecation of btf__get_from_id(), btf__load() libbpf: add split BTF support for btf__load_from_kernel_by_id() tools: bpftool: support dumping split BTF by id tools/bpf/bpftool/btf.c | 8 ++--- tools/bpf/bpftool/btf_dumper.c | 6 ++-- tools/bpf/bpftool/map.c | 14 ++++----- tools/bpf/bpftool/prog.c | 29 +++++++++++------ tools/lib/bpf/Makefile | 3 ++ tools/lib/bpf/btf.c | 33 ++++++++++++++------ tools/lib/bpf/btf.h | 7 ++++- tools/lib/bpf/libbpf.c | 11 ++++--- tools/lib/bpf/libbpf.map | 3 ++ tools/lib/bpf/libbpf_common.h | 19 +++++++++++ tools/perf/util/bpf-event.c | 11 ++++--- tools/perf/util/bpf_counter.c | 12 +++++-- tools/testing/selftests/bpf/prog_tests/btf.c | 4 ++- 13 files changed, 113 insertions(+), 47 deletions(-) -- 2.30.2
