1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <test_progs.h> 4 #include <linux/nbd.h> 5 6 /* NOTE: conflict with other tests. */ 7 void serial_test_raw_tp_writable_test_run(void) 8 { 9 __u32 duration = 0; 10 char error[4096]; 11 12 const struct bpf_insn trace_program[] = { 13 BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), 14 BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0), 15 BPF_MOV64_IMM(BPF_REG_0, 42), 16 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_0, 0), 17 BPF_EXIT_INSN(), 18 }; 19 20 LIBBPF_OPTS(bpf_prog_load_opts, trace_opts, 21 .log_level = 2, 22 .log_buf = error, 23 .log_size = sizeof(error), 24 ); 25 26 int bpf_fd = bpf_prog_load(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, NULL, "GPL v2", 27 trace_program, sizeof(trace_program) / sizeof(struct bpf_insn), 28 &trace_opts); 29 if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable loaded", 30 "failed: %d errno %d\n", bpf_fd, errno)) 31 return; 32 33 const struct bpf_insn skb_program[] = { 34 BPF_MOV64_IMM(BPF_REG_0, 0), 35 BPF_EXIT_INSN(), 36 }; 37 38 LIBBPF_OPTS(bpf_prog_load_opts, skb_opts, 39 .log_buf = error, 40 .log_size = sizeof(error), 41 ); 42 43 int filter_fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, NULL, "GPL v2", 44 skb_program, sizeof(skb_program) / sizeof(struct bpf_insn), 45 &skb_opts); 46 if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n", 47 filter_fd, errno)) 48 goto out_bpffd; 49 50 int tp_fd = bpf_raw_tracepoint_open("bpf_test_finish", bpf_fd); 51 if (CHECK(tp_fd < 0, "bpf_raw_tracepoint_writable opened", 52 "failed: %d errno %d\n", tp_fd, errno)) 53 goto out_filterfd; 54 55 char test_skb[128] = { 56 0, 57 }; 58 59 LIBBPF_OPTS(bpf_test_run_opts, topts, 60 .data_in = test_skb, 61 .data_size_in = sizeof(test_skb), 62 .repeat = 1, 63 ); 64 int err = bpf_prog_test_run_opts(filter_fd, &topts); 65 CHECK(err != 42, "test_run", 66 "tracepoint did not modify return value\n"); 67 CHECK(topts.retval != 0, "test_run_ret", 68 "socket_filter did not return 0\n"); 69 70 close(tp_fd); 71 72 err = bpf_prog_test_run_opts(filter_fd, &topts); 73 CHECK(err != 0, "test_run_notrace", 74 "test_run failed with %d errno %d\n", err, errno); 75 CHECK(topts.retval != 0, "test_run_ret_notrace", 76 "socket_filter did not return 0\n"); 77 78 out_filterfd: 79 close(filter_fd); 80 out_bpffd: 81 close(bpf_fd); 82 } 83