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

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #define _GNU_SOURCE
   4 #include <test_progs.h>
   5 #include <network_helpers.h>
   6 #include <sys/stat.h>
   7 #include <linux/sched.h>
   8 #include <sys/syscall.h>
   9
  10 #include "test_pkt_md_access.skel.h"
  11 #include "test_trace_ext.skel.h"
  12 #include "test_trace_ext_tracing.skel.h"
  13
  14 static __u32 duration;
  15
  16 void test_trace_ext(void)
  17 {
  18         struct test_pkt_md_access *skel_pkt = NULL;
  19         struct test_trace_ext_tracing *skel_trace = NULL;
  20         struct test_trace_ext_tracing__bss *bss_trace;
  21         struct test_trace_ext *skel_ext = NULL;
  22         struct test_trace_ext__bss *bss_ext;
  23         int err, pkt_fd, ext_fd;
  24         struct bpf_program *prog;
  25         char buf[100];
  26         __u32 retval;
  27         __u64 len;
  28
  29         /* open/load/attach test_pkt_md_access */
  30         skel_pkt = test_pkt_md_access__open_and_load();
  31         if (CHECK(!skel_pkt, "setup", "classifier/test_pkt_md_access open failed\n"))
  32                 goto cleanup;
  33
  34         err = test_pkt_md_access__attach(skel_pkt);
  35         if (CHECK(err, "setup", "classifier/test_pkt_md_access attach failed: %d\n", err))
  36                 goto cleanup;
  37
  38         prog = skel_pkt->progs.test_pkt_md_access;
  39         pkt_fd = bpf_program__fd(prog);
  40
  41         /* open extension */
  42         skel_ext = test_trace_ext__open();
  43         if (CHECK(!skel_ext, "setup", "freplace/test_pkt_md_access open failed\n"))
  44                 goto cleanup;
  45
  46         /* set extension's attach target - test_pkt_md_access  */
  47         prog = skel_ext->progs.test_pkt_md_access_new;
  48         bpf_program__set_attach_target(prog, pkt_fd, "test_pkt_md_access");
  49
  50         /* load/attach extension */
  51         err = test_trace_ext__load(skel_ext);
  52         if (CHECK(err, "setup", "freplace/test_pkt_md_access load failed\n")) {
  53                 libbpf_strerror(err, buf, sizeof(buf));
  54                 fprintf(stderr, "%s\n", buf);
  55                 goto cleanup;
  56         }
  57
  58         err = test_trace_ext__attach(skel_ext);
  59         if (CHECK(err, "setup", "freplace/test_pkt_md_access attach failed: %d\n", err))
  60                 goto cleanup;
  61
  62         prog = skel_ext->progs.test_pkt_md_access_new;
  63         ext_fd = bpf_program__fd(prog);
  64
  65         /* open tracing  */
  66         skel_trace = test_trace_ext_tracing__open();
  67         if (CHECK(!skel_trace, "setup", "tracing/test_pkt_md_access_new open failed\n"))
  68                 goto cleanup;
  69
  70         /* set tracing's attach target - fentry */
  71         prog = skel_trace->progs.fentry;
  72         bpf_program__set_attach_target(prog, ext_fd, "test_pkt_md_access_new");
  73
  74         /* set tracing's attach target - fexit */
  75         prog = skel_trace->progs.fexit;
  76         bpf_program__set_attach_target(prog, ext_fd, "test_pkt_md_access_new");
  77
  78         /* load/attach tracing */
  79         err = test_trace_ext_tracing__load(skel_trace);
  80         if (CHECK(err, "setup", "tracing/test_pkt_md_access_new load failed\n")) {
  81                 libbpf_strerror(err, buf, sizeof(buf));
  82                 fprintf(stderr, "%s\n", buf);
  83                 goto cleanup;
  84         }
  85
  86         err = test_trace_ext_tracing__attach(skel_trace);
  87         if (CHECK(err, "setup", "tracing/test_pkt_md_access_new attach failed: %d\n", err))
  88                 goto cleanup;
  89
  90         /* trigger the test */
  91         err = bpf_prog_test_run(pkt_fd, 1, &pkt_v4, sizeof(pkt_v4),
  92                                 NULL, NULL, &retval, &duration);
  93         CHECK(err || retval, "run", "err %d errno %d retval %d\n", err, errno, retval);
  94
  95         bss_ext = skel_ext->bss;
  96         bss_trace = skel_trace->bss;
  97
  98         len = bss_ext->ext_called;
  99
 100         CHECK(bss_ext->ext_called == 0,
 101                 "check", "failed to trigger freplace/test_pkt_md_access\n");
 102         CHECK(bss_trace->fentry_called != len,
 103                 "check", "failed to trigger fentry/test_pkt_md_access_new\n");
 104         CHECK(bss_trace->fexit_called != len,
 105                 "check", "failed to trigger fexit/test_pkt_md_access_new\n");
 106
 107 cleanup:
 108         test_trace_ext_tracing__destroy(skel_trace);
 109         test_trace_ext__destroy(skel_ext);
 110         test_pkt_md_access__destroy(skel_pkt);
 111 }