diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/module_attach.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/module_attach.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/module_attach.c b/tools/testing/selftests/bpf/prog_tests/module_attach.c new file mode 100644 index 000000000000..f53d658ed080 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/module_attach.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Facebook */ + +#include <test_progs.h> +#include <stdbool.h> +#include "test_module_attach.skel.h" +#include "testing_helpers.h" + +static int duration; + +static int trigger_module_test_writable(int *val) +{ + int fd, err; + char buf[65]; + ssize_t rd; + + fd = open(BPF_TESTMOD_TEST_FILE, O_RDONLY); + err = -errno; + if (!ASSERT_GE(fd, 0, "testmode_file_open")) + return err; + + rd = read(fd, buf, sizeof(buf) - 1); + err = -errno; + if (!ASSERT_GT(rd, 0, "testmod_file_rd_val")) { + close(fd); + return err; + } + + buf[rd] = '\0'; + *val = strtol(buf, NULL, 0); + close(fd); + + return 0; +} + +void test_module_attach(void) +{ + const int READ_SZ = 456; + const int WRITE_SZ = 457; + struct test_module_attach* skel; + struct test_module_attach__bss *bss; + struct bpf_link *link; + int err; + int writable_val = 0; + + skel = test_module_attach__open(); + if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) + return; + + err = bpf_program__set_attach_target(skel->progs.handle_fentry_manual, + 0, "bpf_testmod_test_read"); + ASSERT_OK(err, "set_attach_target"); + + err = test_module_attach__load(skel); + if (CHECK(err, "skel_load", "failed to load skeleton\n")) + return; + + bss = skel->bss; + + err = test_module_attach__attach(skel); + if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) + goto cleanup; + + /* trigger tracepoint */ + ASSERT_OK(trigger_module_test_read(READ_SZ), "trigger_read"); + ASSERT_OK(trigger_module_test_write(WRITE_SZ), "trigger_write"); + + ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); + ASSERT_EQ(bss->raw_tp_bare_write_sz, WRITE_SZ, "raw_tp_bare"); + ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); + ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); + ASSERT_EQ(bss->fentry_manual_read_sz, READ_SZ, "fentry_manual"); + ASSERT_EQ(bss->fexit_read_sz, READ_SZ, "fexit"); + ASSERT_EQ(bss->fexit_ret, -EIO, "fexit_tet"); + ASSERT_EQ(bss->fmod_ret_read_sz, READ_SZ, "fmod_ret"); + + bss->raw_tp_writable_bare_early_ret = true; + bss->raw_tp_writable_bare_out_val = 0xf1f2f3f4; + ASSERT_OK(trigger_module_test_writable(&writable_val), + "trigger_writable"); + ASSERT_EQ(bss->raw_tp_writable_bare_in_val, 1024, "writable_test_in"); + ASSERT_EQ(bss->raw_tp_writable_bare_out_val, writable_val, + "writable_test_out"); + + test_module_attach__detach(skel); + + /* attach fentry/fexit and make sure it get's module reference */ + link = bpf_program__attach(skel->progs.handle_fentry); + if (!ASSERT_OK_PTR(link, "attach_fentry")) + goto cleanup; + + ASSERT_ERR(unload_bpf_testmod(false), "unload_bpf_testmod"); + bpf_link__destroy(link); + + link = bpf_program__attach(skel->progs.handle_fexit); + if (!ASSERT_OK_PTR(link, "attach_fexit")) + goto cleanup; + + ASSERT_ERR(unload_bpf_testmod(false), "unload_bpf_testmod"); + bpf_link__destroy(link); + + link = bpf_program__attach(skel->progs.kprobe_multi); + if (!ASSERT_OK_PTR(link, "attach_kprobe_multi")) + goto cleanup; + + ASSERT_ERR(unload_bpf_testmod(false), "unload_bpf_testmod"); + bpf_link__destroy(link); + +cleanup: + test_module_attach__destroy(skel); +} |