On Mon, Jun 10, 2019 at 9:35 PM Andrii Nakryiko <andriin@xxxxxx> wrote: > > This patch set implements initial version (as discussed at LSF/MM2019 > conference) of a new way to specify BPF maps, relying on BTF type information, > which allows for easy extensibility, preserving forward and backward > compatibility. See details and examples in description for patch #6. > > Patch #1 centralizes commonly used min/max macro in libbpf_internal.h. > Patch #2 extracts .BTF and .BTF.ext loading loging from elf_collect(). > Patch #3 refactors map initialization logic into user-provided maps and global > data maps, in preparation to adding another way (BTF-defined maps). > Patch #4 adds support for map definitions in multiple ELF sections and > deprecates bpf_object__find_map_by_offset() API which doesn't appear to be > used anymore and makes assumption that all map definitions reside in single > ELF section. > Patch #5 splits BTF intialization from sanitization/loading into kernel to > preserve original BTF at the time of map initialization. > Patch #6 adds support for BTF-defined maps. > Patch #7 adds new test for BTF-defined map definition. > Patch #8 converts test BPF map definitions to use BTF way. > > rfc->v1: > - error out on unknown field by default (Stanislav, Jakub, Lorenz); > > Andrii Nakryiko (8): > libbpf: add common min/max macro to libbpf_internal.h > libbpf: extract BTF loading and simplify ELF parsing logic > libbpf: refactor map initialization > libbpf: identify maps by section index in addition to offset > libbpf: split initialization and loading of BTF > libbpf: allow specifying map definitions using BTF > selftests/bpf: add test for BTF-defined maps > selftests/bpf: switch tests to BTF-defined map definitions > > tools/lib/bpf/bpf.c | 7 +- > tools/lib/bpf/bpf_prog_linfo.c | 5 +- > tools/lib/bpf/btf.c | 3 - > tools/lib/bpf/btf.h | 1 + > tools/lib/bpf/btf_dump.c | 3 - > tools/lib/bpf/libbpf.c | 767 +++++++++++++----- > tools/lib/bpf/libbpf_internal.h | 7 + > tools/testing/selftests/bpf/progs/bpf_flow.c | 18 +- > .../selftests/bpf/progs/get_cgroup_id_kern.c | 18 +- > .../testing/selftests/bpf/progs/netcnt_prog.c | 22 +- > .../selftests/bpf/progs/sample_map_ret0.c | 18 +- > .../selftests/bpf/progs/socket_cookie_prog.c | 9 +- > .../bpf/progs/sockmap_verdict_prog.c | 36 +- > .../selftests/bpf/progs/test_btf_newkv.c | 73 ++ > .../bpf/progs/test_get_stack_rawtp.c | 27 +- > .../selftests/bpf/progs/test_global_data.c | 27 +- > tools/testing/selftests/bpf/progs/test_l4lb.c | 45 +- > .../selftests/bpf/progs/test_l4lb_noinline.c | 45 +- > .../selftests/bpf/progs/test_map_in_map.c | 20 +- > .../selftests/bpf/progs/test_map_lock.c | 22 +- > .../testing/selftests/bpf/progs/test_obj_id.c | 9 +- > .../bpf/progs/test_select_reuseport_kern.c | 45 +- > .../bpf/progs/test_send_signal_kern.c | 22 +- > .../bpf/progs/test_skb_cgroup_id_kern.c | 9 +- > .../bpf/progs/test_sock_fields_kern.c | 60 +- > .../selftests/bpf/progs/test_spin_lock.c | 33 +- > .../bpf/progs/test_stacktrace_build_id.c | 44 +- > .../selftests/bpf/progs/test_stacktrace_map.c | 40 +- > .../testing/selftests/bpf/progs/test_tc_edt.c | 9 +- > .../bpf/progs/test_tcp_check_syncookie_kern.c | 9 +- > .../selftests/bpf/progs/test_tcp_estats.c | 9 +- > .../selftests/bpf/progs/test_tcpbpf_kern.c | 18 +- > .../selftests/bpf/progs/test_tcpnotify_kern.c | 18 +- > tools/testing/selftests/bpf/progs/test_xdp.c | 18 +- > .../selftests/bpf/progs/test_xdp_noinline.c | 60 +- > tools/testing/selftests/bpf/test_btf.c | 10 +- > .../selftests/bpf/test_queue_stack_map.h | 20 +- > .../testing/selftests/bpf/test_sockmap_kern.h | 72 +- > 38 files changed, 1187 insertions(+), 491 deletions(-) > create mode 100644 tools/testing/selftests/bpf/progs/test_btf_newkv.c > > -- > 2.17.1 > Argh, forgot to remove RFC part, will resend, sorry for spam!
