}
links[0] = bpf_program__attach_uprobe(obj->progs.handle_entry, false,
target_pid ?: -1, libc_path, func_off);
- err = libbpf_get_error(links[0]);
- if (err) {
- warn("failed to attach getaddrinfo: %d\n", err);
+ if (!links[0]) {
+ warn("failed to attach getaddrinfo: %d\n", -errno);
return -1;
}
links[1] = bpf_program__attach_uprobe(obj->progs.handle_return, true,
target_pid ?: -1, libc_path, func_off);
- err = libbpf_get_error(links[1]);
- if (err) {
- warn("failed to attach getaddrinfo: %d\n", err);
+ if (!links[1]) {
+ warn("failed to attach getaddrinfo: %d\n", -errno);
return -1;
}
}
links[2] = bpf_program__attach_uprobe(obj->progs.handle_entry, false,
target_pid ?: -1, libc_path, func_off);
- err = libbpf_get_error(links[2]);
- if (err) {
- warn("failed to attach gethostbyname: %d\n", err);
+ if (!links[2]) {
+ warn("failed to attach gethostbyname: %d\n", -errno);
return -1;
}
links[3] = bpf_program__attach_uprobe(obj->progs.handle_return, true,
target_pid ?: -1, libc_path, func_off);
- err = libbpf_get_error(links[3]);
- if (err) {
- warn("failed to attach gethostbyname: %d\n", err);
+ if (!links[3]) {
+ warn("failed to attach gethostbyname: %d\n", -errno);
return -1;
}
}
links[4] = bpf_program__attach_uprobe(obj->progs.handle_entry, false,
target_pid ?: -1, libc_path, func_off);
- err = libbpf_get_error(links[4]);
- if (err) {
- warn("failed to attach gethostbyname2: %d\n", err);
+ if (!links[4]) {
+ warn("failed to attach gethostbyname2: %d\n", -errno);
return -1;
}
links[5] = bpf_program__attach_uprobe(obj->progs.handle_return, true,
target_pid ?: -1, libc_path, func_off);
- err = libbpf_get_error(links[5]);
- if (err) {
- warn("failed to attach gethostbyname2: %d\n", err);
+ if (!links[5]) {
+ warn("failed to attach gethostbyname2: %d\n", -errno);
return -1;
}
.parser = parse_arg,
.doc = argp_program_doc,
};
- struct perf_buffer_opts pb_opts;
struct perf_buffer *pb = NULL;
struct bpf_link *links[6] = {};
struct gethostlatency_bpf *obj;
if (err)
return err;
- err = bump_memlock_rlimit();
- if (err) {
- warn("failed to increase rlimit: %d\n", err);
- return 1;
- }
+ libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
obj = gethostlatency_bpf__open();
if (!obj) {
if (err)
goto cleanup;
- pb_opts.sample_cb = handle_event;
- pb_opts.lost_cb = handle_lost_events;
pb = perf_buffer__new(bpf_map__fd(obj->maps.events), PERF_BUFFER_PAGES,
- &pb_opts);
- err = libbpf_get_error(pb);
- if (err) {
+ handle_event, handle_lost_events, NULL, NULL);
+ if (!pb) {
+ err = -errno;
warn("failed to open perf buffer: %d\n", err);
goto cleanup;
}
while (!exiting) {
err = perf_buffer__poll(pb, PERF_POLL_TIMEOUT_MS);
- 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 */