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

   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
  14static __u32 duration;
  15
  16void 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
 107cleanup:
 108        test_trace_ext_tracing__destroy(skel_trace);
 109        test_trace_ext__destroy(skel_ext);
 110        test_pkt_md_access__destroy(skel_pkt);
 111}
 112