LXR linux/tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_nbd

   1// SPDX-License-Identifier: GPL-2.0
   2
   3#include <test_progs.h>
   4#include <linux/nbd.h>
   5
   6void test_raw_tp_writable_reject_nbd_invalid(void)
   7{
   8        __u32 duration = 0;
   9        char error[4096];
  10        int bpf_fd = -1, tp_fd = -1;
  11
  12        const struct bpf_insn program[] = {
  13                /* r6 is our tp buffer */
  14                BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
  15                /* one byte beyond the end of the nbd_request struct */
  16                BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_6,
  17                            sizeof(struct nbd_request)),
  18                BPF_EXIT_INSN(),
  19        };
  20
  21        struct bpf_load_program_attr load_attr = {
  22                .prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
  23                .license = "GPL v2",
  24                .insns = program,
  25                .insns_cnt = sizeof(program) / sizeof(struct bpf_insn),
  26                .log_level = 2,
  27        };
  28
  29        bpf_fd = bpf_load_program_xattr(&load_attr, error, sizeof(error));
  30        if (CHECK(bpf_fd < 0, "bpf_raw_tracepoint_writable load",
  31                  "failed: %d errno %d\n", bpf_fd, errno))
  32                return;
  33
  34        tp_fd = bpf_raw_tracepoint_open("nbd_send_request", bpf_fd);
  35        if (CHECK(tp_fd >= 0, "bpf_raw_tracepoint_writable open",
  36                  "erroneously succeeded\n"))
  37                goto out_bpffd;
  38
  39        close(tp_fd);
  40out_bpffd:
  41        close(bpf_fd);
  42}
  43