libbpf-tools: update tcpconnect for libbpf 1.0

Switch to libbpf 1.0 mode and adapt libbpf API usage accordingly.

Signed-off-by: Andrii Nakryiko <[email protected]>

libbpf-tools/tcpconnect.c

@@ -325,26 +325,22 @@ static void handle_lost_events(void *ctx, int cpu, __u64 lost_cnt)
 
 static void print_events(int perf_map_fd)
 {
- struct perf_buffer_opts pb_opts = {
- .sample_cb = handle_event,
- .lost_cb = handle_lost_events,
- };
- struct perf_buffer *pb = NULL;
+ struct perf_buffer *pb;
  int err;
 
- pb = perf_buffer__new(perf_map_fd, 128, &pb_opts);
- err = libbpf_get_error(pb);
- if (err) {
- pb = NULL;
+ pb = perf_buffer__new(perf_map_fd, 128,
+  handle_event, handle_lost_events, NULL, NULL);
+ if (!pb) {
+ err = -errno;
  warn("failed to open perf buffer: %d\n", err);
  goto cleanup;
  }
 
  print_events_header();
  while (!exiting) {
  err = perf_buffer__poll(pb, 100);
- if (err < 0 && errno != EINTR) {
- warn("error polling perf buffer: %s\n", strerror(errno));
+ if (err < 0 && err != -EINTR) {
+ warn("error polling perf buffer: %s\n", strerror(-err));
  goto cleanup;
  }
  /* reset err to return 0 if exiting */
@@ -370,14 +366,9 @@ int main(int argc, char **argv)
  if (err)
  return err;
 
+ libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
  libbpf_set_print(libbpf_print_fn);
 
- err = bump_memlock_rlimit();
- if (err) {
- warn("failed to increase rlimit: %s\n", strerror(errno));
- return 1;
- }
-
  obj = tcpconnect_bpf__open();
  if (!obj) {
  warn("failed to open BPF object\n");