lib/bpf/libbpf.c

10703 struct bpf_link *bpf_program__attach_perf_event_opts(const struct bpf_program *prog, int pfd,
10714 	if (pfd < 0) {
10716 			prog->name, pfd);
10731 	link->perf_event_fd = pfd;
10738 		link_fd = bpf_link_create(prog_fd, pfd, BPF_PERF_EVENT, &link_opts);
10742 				prog->name, pfd,
10754 		if (ioctl(pfd, PERF_EVENT_IOC_SET_BPF, prog_fd) < 0) {
10757 				prog->name, pfd, libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
10759 				pr_warn("prog '%s': try add PERF_SAMPLE_CALLCHAIN to or remove exclude_callchain_[kernel|user] from pfd %d\n",
10760 					prog->name, pfd);
10763 		link->link.fd = pfd;
10765 	if (ioctl(pfd, PERF_EVENT_IOC_ENABLE, 0) < 0) {
10768 			prog->name, pfd, libbpf_strerror_r(err, errmsg, sizeof(errmsg)));
10780 struct bpf_link *bpf_program__attach_perf_event(const struct bpf_program *prog, int pfd)
10782 	return bpf_program__attach_perf_event_opts(prog, pfd, NULL);
10852 	int type, pfd;
10886 	pfd = syscall(__NR_perf_event_open, &attr,
10890 	return pfd >= 0 ? pfd : -errno;
11004 	int type, pfd, err;
11027 	pfd = syscall(__NR_perf_event_open, &attr,
11031 	if (pfd < 0) {
11037 	return pfd;
11084 		int pfd;
11086 		pfd = perf_event_open_probe(false, false, syscall_name, 0, getpid(), 0);
11087 		if (pfd >= 0)
11088 			close(pfd);
11090 		return pfd >= 0 ? 1 : 0;
11115 	int pfd, err;
11147 		pfd = perf_event_open_probe(false /* uprobe */, retprobe,
11160 		pfd = perf_event_kprobe_open_legacy(legacy_probe, retprobe, func_name,
11163 	if (pfd < 0) {
11171 	link = bpf_program__attach_perf_event_opts(prog, pfd, &pe_opts);
11174 		close(pfd);
11706 	int type, pfd, err;
11727 	pfd = syscall(__NR_perf_event_open, &attr,
11731 	if (pfd < 0) {
11736 	return pfd;
12018 	int pfd, err;
12088 		pfd = perf_event_open_probe(true /* uprobe */, retprobe, binary_path,
12103 		pfd = perf_event_uprobe_open_legacy(legacy_probe, retprobe,
12106 	if (pfd < 0) {
12115 	link = bpf_program__attach_perf_event_opts(prog, pfd, &pe_opts);
12118 		close(pfd);
12323 	int tp_id, pfd, err;
12338 	pfd = syscall(__NR_perf_event_open, &attr, -1 /* pid */, 0 /* cpu */,
12340 	if (pfd < 0) {
12347 	return pfd;
12358 	int pfd, err;
12365 	pfd = perf_event_open_tracepoint(tp_category, tp_name);
12366 	if (pfd < 0) {
12369 			libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
12370 		return libbpf_err_ptr(pfd);
12372 	link = bpf_program__attach_perf_event_opts(prog, pfd, &pe_opts);
12375 		close(pfd);
12431 	int prog_fd, pfd;
12449 	pfd = bpf_raw_tracepoint_open_opts(prog_fd, &raw_opts);
12450 	if (pfd < 0) {
12451 		pfd = -errno;
12454 			prog->name, tp_name, libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
12455 		return libbpf_err_ptr(pfd);
12457 	link->fd = pfd;
12515 	int prog_fd, pfd;
12533 	pfd = bpf_link_create(prog_fd, 0, bpf_program__expected_attach_type(prog), &link_opts);
12534 	if (pfd < 0) {
12535 		pfd = -errno;
12538 			prog->name, libbpf_strerror_r(pfd, errmsg, sizeof(errmsg)));
12539 		return libbpf_err_ptr(pfd);
12541 	link->fd = pfd;