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| // SPDX-License-Identifier: GPL-2.0
|
| #include <test_progs.h>
| #include <linux/nbd.h>
|
| void test_raw_tp_writable_test_run(void)
| {
| __u32 duration = 0;
| char error[4096];
|
| const struct bpf_insn trace_program[] = {
| BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
| BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6, 0),
| BPF_MOV64_IMM(BPF_REG_0, 42),
| BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_0, 0),
| BPF_EXIT_INSN(),
| };
|
| struct bpf_load_program_attr load_attr = {
| .prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
| .license = "GPL v2",
| .insns = trace_program,
| .insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn),
| .log_level = 2,
| };
|
| int bpf_fd = bpf_load_program_xattr(&load_attr, error, sizeof(error));
| if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable loaded",
| "failed: %d errno %d\n", bpf_fd, errno))
| return;
|
| const struct bpf_insn skb_program[] = {
| BPF_MOV64_IMM(BPF_REG_0, 0),
| BPF_EXIT_INSN(),
| };
|
| struct bpf_load_program_attr skb_load_attr = {
| .prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
| .license = "GPL v2",
| .insns = skb_program,
| .insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn),
| };
|
| int filter_fd =
| bpf_load_program_xattr(&skb_load_attr, error, sizeof(error));
| if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
| filter_fd, errno))
| goto out_bpffd;
|
| int tp_fd = bpf_raw_tracepoint_open("bpf_test_finish", bpf_fd);
| if (CHECK(tp_fd < 0, "bpf_raw_tracepoint_writable opened",
| "failed: %d errno %d\n", tp_fd, errno))
| goto out_filterfd;
|
| char test_skb[128] = {
| 0,
| };
|
| __u32 prog_ret;
| int err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0,
| 0, &prog_ret, 0);
| CHECK(err != 42, "test_run",
| "tracepoint did not modify return value\n");
| CHECK(prog_ret != 0, "test_run_ret",
| "socket_filter did not return 0\n");
|
| close(tp_fd);
|
| err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0, 0,
| &prog_ret, 0);
| CHECK(err != 0, "test_run_notrace",
| "test_run failed with %d errno %d\n", err, errno);
| CHECK(prog_ret != 0, "test_run_ret_notrace",
| "socket_filter did not return 0\n");
|
| out_filterfd:
| close(filter_fd);
| out_bpffd:
| close(bpf_fd);
| }
|
|
