On Mon, Dec 14, 2020 at 11:53 AM Dmitrii Banshchikov <me@xxxxxxxxxxxxx> wrote: > > This patchset adds support of a pointer to struct among global function > arguments. > > The motivation is to overcome the limit on the maximum number of allowed > arguments and avoid tricky and unoptimal ways of passing arguments. > > The limitation is that used structs may not contain any other pointers. > This patch set seems to be breaking a few selftests, please take a look ([0]). [0] https://travis-ci.com/github/kernel-patches/bpf/builds/208973941 > Dmitrii Banshchikov (3): > bpf: Factor out nullable reg type conversion > bpf: Support pointer to struct in global func args > selftests/bpf: Add unit tests for global functions > > include/linux/bpf_verifier.h | 2 + > kernel/bpf/btf.c | 59 ++++++++-- > kernel/bpf/verifier.c | 107 ++++++++++++------ > .../bpf/prog_tests/test_global_funcs.c | 5 + > .../selftests/bpf/progs/test_global_func10.c | 29 +++++ > .../selftests/bpf/progs/test_global_func11.c | 19 ++++ > .../selftests/bpf/progs/test_global_func12.c | 21 ++++ > .../selftests/bpf/progs/test_global_func13.c | 24 ++++ > .../selftests/bpf/progs/test_global_func9.c | 59 ++++++++++ > 9 files changed, 284 insertions(+), 41 deletions(-) > create mode 100644 tools/testing/selftests/bpf/progs/test_global_func10.c > create mode 100644 tools/testing/selftests/bpf/progs/test_global_func11.c > create mode 100644 tools/testing/selftests/bpf/progs/test_global_func12.c > create mode 100644 tools/testing/selftests/bpf/progs/test_global_func13.c > create mode 100644 tools/testing/selftests/bpf/progs/test_global_func9.c > > -- > 2.25.1 >
