99 	int err = 0, num_objs = 0;  in bpf_seq_read()  local
109 			err = -ENOMEM;  in bpf_seq_read()
116 		err = copy_to_user(buf, seq->buf + seq->from, n);  in bpf_seq_read()
117 		if (err) {  in bpf_seq_read()
118 			err = -EFAULT;  in bpf_seq_read()
132 		err = PTR_ERR(p);  in bpf_seq_read()
138 	err = seq->op->show(seq, p);  in bpf_seq_read()
139 	if (err > 0) {  in bpf_seq_read()
145 	} else if (err < 0 || seq_has_overflowed(seq)) {  in bpf_seq_read()
146 		if (!err)  in bpf_seq_read()
147 			err = -E2BIG;  in bpf_seq_read()
178 				err = -EAGAIN;  in bpf_seq_read()
185 		err = seq->op->show(seq, p);  in bpf_seq_read()
186 		if (err > 0) {  in bpf_seq_read()
189 		} else if (err < 0 || seq_has_overflowed(seq)) {  in bpf_seq_read()
192 				if (!err)  in bpf_seq_read()
193 					err = -E2BIG;  in bpf_seq_read()
207 		err = PTR_ERR(p);  in bpf_seq_read()
218 				err = -E2BIG;  in bpf_seq_read()
225 	err = copy_to_user(buf, seq->buf, n);  in bpf_seq_read()
226 	if (err) {  in bpf_seq_read()
227 		err = -EFAULT;  in bpf_seq_read()
235 		copied = err;  in bpf_seq_read()
516 	int err;  in bpf_iter_link_attach()  local
529 		err = bpf_check_uarg_tail_zero(ulinfo, sizeof(linfo),  in bpf_iter_link_attach()
531 		if (err)  in bpf_iter_link_attach()
532 			return err;  in bpf_iter_link_attach()
561 	err = bpf_link_prime(&link->link, &link_primer);  in bpf_iter_link_attach()
562 	if (err) {  in bpf_iter_link_attach()
564 		return err;  in bpf_iter_link_attach()
568 		err = tinfo->reg_info->attach_target(prog, &linfo, &link->aux);  in bpf_iter_link_attach()
569 		if (err) {  in bpf_iter_link_attach()
571 			return err;  in bpf_iter_link_attach()
599 	int err = 0;  in prepare_seq_file()  local
612 		err = -ENOMEM;  in prepare_seq_file()
617 		err = seq_info->init_seq_private(priv_data->target_private, &link->aux);  in prepare_seq_file()
618 		if (err)  in prepare_seq_file()
633 	return err;  in prepare_seq_file()
641 	int err, fd;  in bpf_iter_new_fd()  local
653 		err = PTR_ERR(file);  in bpf_iter_new_fd()
658 	err = prepare_seq_file(file, iter_link, __get_seq_info(iter_link));  in bpf_iter_new_fd()
659 	if (err)  in bpf_iter_new_fd()
669 	return err;  in bpf_iter_new_fd()