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 delete_module(const char *name, int flags) 10 { 11 return syscall(__NR_delete_module, name, flags); 12 } 13 14 void test_module_attach(void) 15 { 16 const int READ_SZ = 456; 17 const int WRITE_SZ = 457; 18 struct test_module_attach* skel; 19 struct test_module_attach__bss *bss; 20 struct bpf_link *link; 21 int err; 22 23 skel = test_module_attach__open(); 24 if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) 25 return; 26 27 err = bpf_program__set_attach_target(skel->progs.handle_fentry_manual, 28 0, "bpf_testmod_test_read"); 29 ASSERT_OK(err, "set_attach_target"); 30 31 err = test_module_attach__load(skel); 32 if (CHECK(err, "skel_load", "failed to load 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 ASSERT_OK(trigger_module_test_write(WRITE_SZ), "trigger_write"); 44 45 ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); 46 ASSERT_EQ(bss->raw_tp_bare_write_sz, WRITE_SZ, "raw_tp_bare"); 47 ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); 48 ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); 49 ASSERT_EQ(bss->fentry_manual_read_sz, READ_SZ, "fentry_manual"); 50 ASSERT_EQ(bss->fexit_read_sz, READ_SZ, "fexit"); 51 ASSERT_EQ(bss->fexit_ret, -EIO, "fexit_tet"); 52 ASSERT_EQ(bss->fmod_ret_read_sz, READ_SZ, "fmod_ret"); 53 54 test_module_attach__detach(skel); 55 56 /* attach fentry/fexit and make sure it get's module reference */ 57 link = bpf_program__attach(skel->progs.handle_fentry); 58 if (!ASSERT_OK_PTR(link, "attach_fentry")) 59 goto cleanup; 60 61 ASSERT_ERR(delete_module("bpf_testmod", 0), "delete_module"); 62 bpf_link__destroy(link); 63 64 link = bpf_program__attach(skel->progs.handle_fexit); 65 if (!ASSERT_OK_PTR(link, "attach_fexit")) 66 goto cleanup; 67 68 ASSERT_ERR(delete_module("bpf_testmod", 0), "delete_module"); 69 bpf_link__destroy(link); 70 71 cleanup: 72 test_module_attach__destroy(skel); 73 } 74