1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2020 Facebook */ 3 4 #include <test_progs.h> 5 #include "test_module_attach.skel.h" 6 7 static int duration; 8 9 static int trigger_module_test_read(int read_sz) 10 { 11 int fd, err; 12 13 fd = open("/sys/kernel/bpf_testmod", O_RDONLY); 14 err = -errno; 15 if (CHECK(fd < 0, "testmod_file_open", "failed: %d\n", err)) 16 return err; 17 18 read(fd, NULL, read_sz); 19 close(fd); 20 21 return 0; 22 } 23 24 void test_module_attach(void) 25 { 26 const int READ_SZ = 456; 27 struct test_module_attach* skel; 28 struct test_module_attach__bss *bss; 29 int err; 30 31 skel = test_module_attach__open_and_load(); 32 if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) 33 return; 34 35 bss = skel->bss; 36 37 err = test_module_attach__attach(skel); 38 if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) 39 goto cleanup; 40 41 /* trigger tracepoint */ 42 ASSERT_OK(trigger_module_test_read(READ_SZ), "trigger_read"); 43 44 ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); 45 ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); 46 ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); 47 ASSERT_EQ(bss->fexit_read_sz, READ_SZ, "fexit"); 48 ASSERT_EQ(bss->fexit_ret, -EIO, "fexit_tet"); 49 ASSERT_EQ(bss->fmod_ret_read_sz, READ_SZ, "fmod_ret"); 50 51 cleanup: 52 test_module_attach__destroy(skel); 53 } 54