11e38abefSAndrii Nakryiko // SPDX-License-Identifier: GPL-2.0 21e38abefSAndrii Nakryiko /* Copyright (c) 2020 Facebook */ 31e38abefSAndrii Nakryiko 41e38abefSAndrii Nakryiko #include <test_progs.h> 5fa7f17d0SHou Tao #include <stdbool.h> 61e38abefSAndrii Nakryiko #include "test_module_attach.skel.h" 71e38abefSAndrii Nakryiko 81e38abefSAndrii Nakryiko static int duration; 91e38abefSAndrii Nakryiko 10fa7f17d0SHou Tao static int trigger_module_test_writable(int *val) 11fa7f17d0SHou Tao { 12fa7f17d0SHou Tao int fd, err; 13fa7f17d0SHou Tao char buf[65]; 14fa7f17d0SHou Tao ssize_t rd; 15fa7f17d0SHou Tao 16fa7f17d0SHou Tao fd = open(BPF_TESTMOD_TEST_FILE, O_RDONLY); 17fa7f17d0SHou Tao err = -errno; 18fa7f17d0SHou Tao if (!ASSERT_GE(fd, 0, "testmode_file_open")) 19fa7f17d0SHou Tao return err; 20fa7f17d0SHou Tao 21fa7f17d0SHou Tao rd = read(fd, buf, sizeof(buf) - 1); 22fa7f17d0SHou Tao err = -errno; 23fa7f17d0SHou Tao if (!ASSERT_GT(rd, 0, "testmod_file_rd_val")) { 24fa7f17d0SHou Tao close(fd); 25fa7f17d0SHou Tao return err; 26fa7f17d0SHou Tao } 27fa7f17d0SHou Tao 28fa7f17d0SHou Tao buf[rd] = '\0'; 29fa7f17d0SHou Tao *val = strtol(buf, NULL, 0); 30fa7f17d0SHou Tao close(fd); 31fa7f17d0SHou Tao 32fa7f17d0SHou Tao return 0; 33fa7f17d0SHou Tao } 34fa7f17d0SHou Tao 35a1c05c3bSJiri Olsa static int delete_module(const char *name, int flags) 36a1c05c3bSJiri Olsa { 37a1c05c3bSJiri Olsa return syscall(__NR_delete_module, name, flags); 38a1c05c3bSJiri Olsa } 39a1c05c3bSJiri Olsa 401e38abefSAndrii Nakryiko void test_module_attach(void) 411e38abefSAndrii Nakryiko { 421e38abefSAndrii Nakryiko const int READ_SZ = 456; 43407be922SQais Yousef const int WRITE_SZ = 457; 441e38abefSAndrii Nakryiko struct test_module_attach* skel; 451e38abefSAndrii Nakryiko struct test_module_attach__bss *bss; 46a1c05c3bSJiri Olsa struct bpf_link *link; 471e38abefSAndrii Nakryiko int err; 48fa7f17d0SHou Tao int writable_val = 0; 491e38abefSAndrii Nakryiko 502e33f831SAndrii Nakryiko skel = test_module_attach__open(); 511e38abefSAndrii Nakryiko if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) 521e38abefSAndrii Nakryiko return; 531e38abefSAndrii Nakryiko 542e33f831SAndrii Nakryiko err = bpf_program__set_attach_target(skel->progs.handle_fentry_manual, 552e33f831SAndrii Nakryiko 0, "bpf_testmod_test_read"); 562e33f831SAndrii Nakryiko ASSERT_OK(err, "set_attach_target"); 572e33f831SAndrii Nakryiko 582e33f831SAndrii Nakryiko err = test_module_attach__load(skel); 592e33f831SAndrii Nakryiko if (CHECK(err, "skel_load", "failed to load skeleton\n")) 602e33f831SAndrii Nakryiko return; 612e33f831SAndrii Nakryiko 621e38abefSAndrii Nakryiko bss = skel->bss; 631e38abefSAndrii Nakryiko 641e38abefSAndrii Nakryiko err = test_module_attach__attach(skel); 651e38abefSAndrii Nakryiko if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) 661e38abefSAndrii Nakryiko goto cleanup; 671e38abefSAndrii Nakryiko 681e38abefSAndrii Nakryiko /* trigger tracepoint */ 691e38abefSAndrii Nakryiko ASSERT_OK(trigger_module_test_read(READ_SZ), "trigger_read"); 70407be922SQais Yousef ASSERT_OK(trigger_module_test_write(WRITE_SZ), "trigger_write"); 711e38abefSAndrii Nakryiko 721e38abefSAndrii Nakryiko ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); 73407be922SQais Yousef ASSERT_EQ(bss->raw_tp_bare_write_sz, WRITE_SZ, "raw_tp_bare"); 741e38abefSAndrii Nakryiko ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); 751e38abefSAndrii Nakryiko ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); 762e33f831SAndrii Nakryiko ASSERT_EQ(bss->fentry_manual_read_sz, READ_SZ, "fentry_manual"); 771e38abefSAndrii Nakryiko ASSERT_EQ(bss->fexit_read_sz, READ_SZ, "fexit"); 781e38abefSAndrii Nakryiko ASSERT_EQ(bss->fexit_ret, -EIO, "fexit_tet"); 791e38abefSAndrii Nakryiko ASSERT_EQ(bss->fmod_ret_read_sz, READ_SZ, "fmod_ret"); 801e38abefSAndrii Nakryiko 81fa7f17d0SHou Tao bss->raw_tp_writable_bare_early_ret = true; 82fa7f17d0SHou Tao bss->raw_tp_writable_bare_out_val = 0xf1f2f3f4; 83fa7f17d0SHou Tao ASSERT_OK(trigger_module_test_writable(&writable_val), 84fa7f17d0SHou Tao "trigger_writable"); 85fa7f17d0SHou Tao ASSERT_EQ(bss->raw_tp_writable_bare_in_val, 1024, "writable_test_in"); 86fa7f17d0SHou Tao ASSERT_EQ(bss->raw_tp_writable_bare_out_val, writable_val, 87fa7f17d0SHou Tao "writable_test_out"); 88fa7f17d0SHou Tao 89a1c05c3bSJiri Olsa test_module_attach__detach(skel); 90a1c05c3bSJiri Olsa 91a1c05c3bSJiri Olsa /* attach fentry/fexit and make sure it get's module reference */ 92a1c05c3bSJiri Olsa link = bpf_program__attach(skel->progs.handle_fentry); 93a1c05c3bSJiri Olsa if (!ASSERT_OK_PTR(link, "attach_fentry")) 94a1c05c3bSJiri Olsa goto cleanup; 95a1c05c3bSJiri Olsa 96a1c05c3bSJiri Olsa ASSERT_ERR(delete_module("bpf_testmod", 0), "delete_module"); 97a1c05c3bSJiri Olsa bpf_link__destroy(link); 98a1c05c3bSJiri Olsa 99a1c05c3bSJiri Olsa link = bpf_program__attach(skel->progs.handle_fexit); 100a1c05c3bSJiri Olsa if (!ASSERT_OK_PTR(link, "attach_fexit")) 101a1c05c3bSJiri Olsa goto cleanup; 102a1c05c3bSJiri Olsa 103a1c05c3bSJiri Olsa ASSERT_ERR(delete_module("bpf_testmod", 0), "delete_module"); 104a1c05c3bSJiri Olsa bpf_link__destroy(link); 105a1c05c3bSJiri Olsa 106*e697d8dcSJiri Olsa link = bpf_program__attach(skel->progs.kprobe_multi); 107*e697d8dcSJiri Olsa if (!ASSERT_OK_PTR(link, "attach_kprobe_multi")) 108*e697d8dcSJiri Olsa goto cleanup; 109*e697d8dcSJiri Olsa 110*e697d8dcSJiri Olsa ASSERT_ERR(delete_module("bpf_testmod", 0), "delete_module"); 111*e697d8dcSJiri Olsa bpf_link__destroy(link); 112*e697d8dcSJiri Olsa 1131e38abefSAndrii Nakryiko cleanup: 1141e38abefSAndrii Nakryiko test_module_attach__destroy(skel); 1151e38abefSAndrii Nakryiko } 116