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[178.5.225.126]) by smtp.gmail.com with ESMTPSA id d11-20020a056402400b00b00423e5bdd6e3sm1152312eda.84.2022.04.22.11.23.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Apr 2022 11:23:44 -0700 (PDT) From: Dmitrii Dolgov <9erthalion6@gmail.com> To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, yhs@fb.com, songliubraving@fb.com Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Subject: [RFC PATCH bpf-next 2/2] selftests/bpf: Add bpf link iter test Date: Fri, 22 Apr 2022 20:22:54 +0200 Message-Id: <20220422182254.13693-3-9erthalion6@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220422182254.13693-1-9erthalion6@gmail.com> References: <20220422182254.13693-1-9erthalion6@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC Add a simple test for bpf link iterator Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> --- .../selftests/bpf/prog_tests/bpf_iter.c | 15 +++++++++++++++ .../selftests/bpf/progs/bpf_iter_bpf_link.c | 18 ++++++++++++++++++ 2 files changed, 33 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_bpf_link.c diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 2c403ddc8076..e14a7a6d925c 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -26,6 +26,7 @@ #include "bpf_iter_bpf_sk_storage_map.skel.h" #include "bpf_iter_test_kern5.skel.h" #include "bpf_iter_test_kern6.skel.h" +#include "bpf_iter_bpf_link.skel.h" static int duration; @@ -1172,6 +1173,20 @@ static void test_buf_neg_offset(void) bpf_iter_test_kern6__destroy(skel); } +static void test_link_iter(void) +{ + struct bpf_iter_bpf_link *skel; + + skel = bpf_iter_bpf_link__open_and_load(); + if (CHECK(skel, "bpf_iter_bpf_link__open_and_load", + "skeleton open_and_load unexpected success\n")) + return; + + do_dummy_read(skel->progs.dump_bpf_link); + + bpf_iter_bpf_link__destroy(skel); +} + #define CMP_BUFFER_SIZE 1024 static char task_vma_output[CMP_BUFFER_SIZE]; static char proc_maps_output[CMP_BUFFER_SIZE]; diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_link.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_link.c new file mode 100644 index 000000000000..a5041fa1cda9 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_link.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Facebook */ +#include "bpf_iter.h" +#include + +char _license[] SEC("license") = "GPL"; + +SEC("iter/bpf_link") +int dump_bpf_link(struct bpf_iter__bpf_link *ctx) +{ + struct seq_file *seq = ctx->meta->seq; + struct bpf_link *link = ctx->link; + int link_id; + + link_id = link->id; + bpf_seq_write(seq, &link_id, sizeof(link_id)); + return 0; +}