Quelle  trace_ext.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0

#define _GNU_SOURCE
#include <test_progs.h>
#include <network_helpers.h>
#include <sys/stat.h>
#include <linux/sched.h>
#include <sys/syscall.h>

#include "test_pkt_md_access.skel.h"
#include "test_trace_ext.skel.h"
#include "test_trace_ext_tracing.skel.h"

static __u32 duration;

void test_trace_ext(void)
{
 struct test_pkt_md_access *skel_pkt = NULL;
 struct test_trace_ext_tracing *skel_trace = NULL;
 struct test_trace_ext_tracing__bss *bss_trace;
 struct test_trace_ext *skel_ext = NULL;
 struct test_trace_ext__bss *bss_ext;
 int err, pkt_fd, ext_fd;
 struct bpf_program *prog;
 char buf[100];
 __u64 len;
 LIBBPF_OPTS(bpf_test_run_opts, topts,
  .data_in = &pkt_v4,
  .data_size_in = sizeof(pkt_v4),
  .repeat = 1,
 );

 /* open/load/attach test_pkt_md_access */
 skel_pkt = test_pkt_md_access__open_and_load();
 if (CHECK(!skel_pkt, "setup", "classifier/test_pkt_md_access open failed\n"))
  goto cleanup;

 err = test_pkt_md_access__attach(skel_pkt);
 if (CHECK(err, "setup", "classifier/test_pkt_md_access attach failed: %d\n", err))
  goto cleanup;

 prog = skel_pkt->progs.test_pkt_md_access;
 pkt_fd = bpf_program__fd(prog);

 /* open extension */
 skel_ext = test_trace_ext__open();
 if (CHECK(!skel_ext, "setup", "freplace/test_pkt_md_access open failed\n"))
  goto cleanup;

 /* set extension's attach target - test_pkt_md_access  */
 prog = skel_ext->progs.test_pkt_md_access_new;
 bpf_program__set_attach_target(prog, pkt_fd, "test_pkt_md_access");

 /* load/attach extension */
 err = test_trace_ext__load(skel_ext);
 if (CHECK(err, "setup", "freplace/test_pkt_md_access load failed\n")) {
  libbpf_strerror(err, buf, sizeof(buf));
  fprintf(stderr, "%s\n", buf);
  goto cleanup;
 }

 err = test_trace_ext__attach(skel_ext);
 if (CHECK(err, "setup", "freplace/test_pkt_md_access attach failed: %d\n", err))
  goto cleanup;

 prog = skel_ext->progs.test_pkt_md_access_new;
 ext_fd = bpf_program__fd(prog);

 /* open tracing  */
 skel_trace = test_trace_ext_tracing__open();
 if (CHECK(!skel_trace, "setup", "tracing/test_pkt_md_access_new open failed\n"))
  goto cleanup;

 /* set tracing's attach target - fentry */
 prog = skel_trace->progs.fentry;
 bpf_program__set_attach_target(prog, ext_fd, "test_pkt_md_access_new");

 /* set tracing's attach target - fexit */
 prog = skel_trace->progs.fexit;
 bpf_program__set_attach_target(prog, ext_fd, "test_pkt_md_access_new");

 /* load/attach tracing */
 err = test_trace_ext_tracing__load(skel_trace);
 if (!ASSERT_OK(err, "tracing/test_pkt_md_access_new load")) {
  libbpf_strerror(err, buf, sizeof(buf));
  fprintf(stderr, "%s\n", buf);
  goto cleanup;
 }

 err = test_trace_ext_tracing__attach(skel_trace);
 if (!ASSERT_OK(err, "tracing/test_pkt_md_access_new attach"))
  goto cleanup;

 /* trigger the test */
 err = bpf_prog_test_run_opts(pkt_fd, &topts);
 ASSERT_OK(err, "test_run_opts err");
 ASSERT_OK(topts.retval, "test_run_opts retval");

 bss_ext = skel_ext->bss;
 bss_trace = skel_trace->bss;

 len = bss_ext->ext_called;

 ASSERT_NEQ(bss_ext->ext_called, 0,
    "failed to trigger freplace/test_pkt_md_access");
 ASSERT_EQ(bss_trace->fentry_called, len,
    "failed to trigger fentry/test_pkt_md_access_new");
 ASSERT_EQ(bss_trace->fexit_called, len,
     "failed to trigger fexit/test_pkt_md_access_new");

cleanup:
 test_trace_ext_tracing__destroy(skel_trace);
 test_trace_ext__destroy(skel_ext);
 test_pkt_md_access__destroy(skel_pkt);
}