tools/testing/selftests/bpf/prog_tests/raw_tp_writable_reject_nbd_invalid.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <test_progs.h>
   4 #include <linux/nbd.h>
   5
   6 void 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);
  40 out_bpffd:
  41         close(bpf_fd);
  42 }