From nobody Mon Apr 6 23:17:38 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2D37ECAAD3 for ; Fri, 2 Sep 2022 01:00:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235033AbiIBBAq (ORCPT ); Thu, 1 Sep 2022 21:00:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234803AbiIBBA1 (ORCPT ); Thu, 1 Sep 2022 21:00:27 -0400 Received: from gnuweeb.org (gnuweeb.org [51.81.211.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2C0247BB3 for ; Thu, 1 Sep 2022 18:00:26 -0700 (PDT) Received: from localhost.localdomain (unknown [182.2.38.99]) by gnuweeb.org (Postfix) with ESMTPSA id 5C5AD80C0C; Fri, 2 Sep 2022 01:00:22 +0000 (UTC) X-GW-Data: lPqxHiMPbJw1wb7CM9QUryAGzr0yq5atzVDdxTR0iA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1662080426; bh=O+bQx1dVeJn2RzOj49n3WMYCD9Vph/X1is42mAcoHoU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FqYCo+8x8PKijRKVwSGBuWz3Gh/vMusuucmB2o62U2GfeYyUjf8RqkSfi9BtIF5SS xLASi+hLMStOoDXS6/9pje40C1NXxnZaBrDOYAzfK+snLZrOgqhY2erCB3Qfbf1ODZ Z+EbeC2teDZFkUj6B3l5wwZr8S1cfFPN3IUhddORZETQPA9nG2NSopmKqBSIZOe1L3 3wKDigjQFbcIjFft0J1mZpsuI56BAXW7A930ihTm0YzYXlpnv/dSqwyKUFd7vNKotJ DeOrCMGcB1IcJ9jpuhQEQD54QznqIddrK8KCTABezgw33Qvmz8rXyV55T1Kw+R9pIl FewQX9Y6WkAFw== From: Ammar Faizi To: Jens Axboe Cc: Ammar Faizi , Dylan Yudaken , Facebook Kernel Team , Pavel Begunkov , Kanna Scarlet , Muhammad Rizki , GNU/Weeb Mailing List , io-uring Mailing List , Linux Kernel Mailing List Subject: [PATCH liburing v1 02/12] t/poll-link: Don't brute force the port number Date: Fri, 2 Sep 2022 07:59:36 +0700 Message-Id: <20220902005825.2484023-3-ammar.faizi@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220902005825.2484023-1-ammar.faizi@intel.com> References: <20220902005825.2484023-1-ammar.faizi@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Ammar Faizi Don't brute force the port number, use `t_bind_ephemeral_port()`, much simpler and reliable for choosing a port number that is not in use. Cc: Dylan Yudaken Cc: Facebook Kernel Team Cc: Pavel Begunkov Signed-off-by: Ammar Faizi --- test/poll-link.c | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-) diff --git a/test/poll-link.c b/test/poll-link.c index 197ad77..a6fe0de 100644 --- a/test/poll-link.c +++ b/test/poll-link.c @@ -3,26 +3,27 @@ #include #include #include #include #include #include #include #include #include #include #include #include =20 +#include "helpers.h" #include "liburing.h" =20 pthread_mutex_t mutex =3D PTHREAD_MUTEX_INITIALIZER; pthread_cond_t cond =3D PTHREAD_COND_INITIALIZER; =20 static int recv_thread_ready =3D 0; static int recv_thread_done =3D 0; =20 static void signal_var(int *var) { pthread_mutex_lock(&mutex); *var =3D 1; pthread_cond_signal(&cond); @@ -79,47 +80,39 @@ void *recv_thread(void *arg) =20 ret =3D io_uring_queue_init(8, &ring, 0); assert(ret =3D=3D 0); =20 int s0 =3D socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); assert(s0 !=3D -1); =20 int32_t val =3D 1; ret =3D setsockopt(s0, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val)); assert(ret !=3D -1); ret =3D setsockopt(s0, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); assert(ret !=3D -1); =20 - struct sockaddr_in addr; + struct sockaddr_in addr =3D { }; =20 addr.sin_family =3D AF_INET; data->addr =3D inet_addr("127.0.0.1"); addr.sin_addr.s_addr =3D data->addr; =20 - i =3D 0; - do { - data->port =3D htons(1025 + (rand() % 64510)); - addr.sin_port =3D data->port; - - if (bind(s0, (struct sockaddr*)&addr, sizeof(addr)) !=3D -1) - break; - } while (++i < 100); - - if (i >=3D 100) { - fprintf(stderr, "Can't find good port, skipped\n"); + if (t_bind_ephemeral_port(s0, &addr)) { + perror("bind"); data->stop =3D 1; signal_var(&recv_thread_ready); - goto out; + goto err; } + data->port =3D addr.sin_port; =20 ret =3D listen(s0, 128); assert(ret !=3D -1); =20 signal_var(&recv_thread_ready); =20 sqe =3D io_uring_get_sqe(&ring); assert(sqe !=3D NULL); =20 io_uring_prep_poll_add(sqe, s0, POLLIN | POLLHUP | POLLERR); sqe->flags |=3D IOSQE_IO_LINK; sqe->user_data =3D 1; =20 @@ -148,27 +141,26 @@ void *recv_thread(void *arg) fprintf(stderr, "cqe %" PRIu64 " got %x, wanted mask %x\n", (uint64_t) cqe->user_data, cqe->res, data->expected[idx]); goto err; } else if (!data->is_mask[idx] && cqe->res !=3D data->expected[idx]) { fprintf(stderr, "cqe %" PRIu64 " got %d, wanted %d\n", (uint64_t) cqe->user_data, cqe->res, data->expected[idx]); goto err; } io_uring_cqe_seen(&ring, cqe); } =20 -out: signal_var(&recv_thread_done); close(s0); io_uring_queue_exit(&ring); return NULL; err: signal_var(&recv_thread_done); close(s0); io_uring_queue_exit(&ring); return (void *) 1; } =20 static int test_poll_timeout(int do_connect, unsigned long timeout) { --=20 Ammar Faizi