From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=ALL_TRUSTED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NO_DNS_FOR_FROM,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 Received: from localhost.localdomain (unknown [182.2.70.226]) by gnuweeb.org (Postfix) with ESMTPSA id CB2DD80C38; Fri, 2 Sep 2022 07:15:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1662102935; bh=tWfvU6nGOwRgpO1E4lOI3rFftClQKt3nqBwHF9ncPfk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mBoR9nBt+OjwsAh9U+XqX3Dg0nlnHcWGaEscVB6/hGW2VWGdUuT2U0LDrgpHvLOlg d0E08KVyAYw8oZ7R4DUX/whctCnkSFHhR9t4gZyw0sWpb0mKN+Ac18JZNqY4kuKGgb ywL6mNxpvPy+N8WW+Mu6yx1satGQpvWwc4SEfkafnDQlAvXS5jFvaY5DgV75IOVmFr qvRWCAudRnMaYuWbBLT9crMIEQxSgfUPAA1laUW4vrmPyLMbP6ks3WbUodS1+lDuVn IdkFarB75Vaj60E20LsFYaTko6AMX7dPPbZZzUsy8dGoj3EWHNsICZoQCMuTz9hoGE OjE5Lh4xHM5/w== From: Ammar Faizi To: Jens Axboe Cc: Ammar Faizi , Dylan Yudaken , Facebook Kernel Team , Pavel Begunkov , io-uring Mailing List , GNU/Weeb Mailing List , Kanna Scarlet , Muhammad Rizki , Alviro Iskandar Setiawan Subject: [PATCH liburing v2 02/12] t/poll-link: Don't brute force the port number Date: Fri, 2 Sep 2022 14:14:55 +0700 Message-Id: <20220902071153.3168814-3-ammar.faizi@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220902071153.3168814-1-ammar.faizi@intel.com> References: <20220902071153.3168814-1-ammar.faizi@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit List-Id: 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. v2: - While in there, fix variable placements (put them at the top). Cc: Dylan Yudaken Cc: Facebook Kernel Team Cc: Pavel Begunkov Reviewed-by: Alviro Iskandar Setiawan Tested-by: Alviro Iskandar Setiawan Signed-off-by: Ammar Faizi --- test/poll-link.c | 27 +++++++++------------------ 1 file changed, 9 insertions(+), 18 deletions(-) diff --git a/test/poll-link.c b/test/poll-link.c index 197ad77..39b48f5 100644 --- a/test/poll-link.c +++ b/test/poll-link.c @@ -9,14 +9,15 @@ #include #include #include #include #include #include +#include "helpers.h" #include "liburing.h" pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; pthread_cond_t cond = PTHREAD_COND_INITIALIZER; static int recv_thread_ready = 0; static int recv_thread_done = 0; @@ -46,36 +47,37 @@ struct data { unsigned short port; unsigned int addr; int stop; }; static void *send_thread(void *arg) { + struct sockaddr_in addr; struct data *data = arg; + int s0; wait_for_var(&recv_thread_ready); - int s0 = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + s0 = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); assert(s0 != -1); - struct sockaddr_in addr; - addr.sin_family = AF_INET; addr.sin_port = data->port; addr.sin_addr.s_addr = data->addr; if (connect(s0, (struct sockaddr*)&addr, sizeof(addr)) != -1) wait_for_var(&recv_thread_done); close(s0); return 0; } void *recv_thread(void *arg) { + struct sockaddr_in addr = { }; struct data *data = arg; struct io_uring_sqe *sqe; struct io_uring ring; int i, ret; ret = io_uring_queue_init(8, &ring, 0); assert(ret == 0); @@ -85,35 +87,25 @@ void *recv_thread(void *arg) int32_t val = 1; ret = setsockopt(s0, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val)); assert(ret != -1); ret = setsockopt(s0, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); assert(ret != -1); - struct sockaddr_in addr; - addr.sin_family = AF_INET; data->addr = inet_addr("127.0.0.1"); addr.sin_addr.s_addr = data->addr; - i = 0; - do { - data->port = htons(1025 + (rand() % 64510)); - addr.sin_port = data->port; - - if (bind(s0, (struct sockaddr*)&addr, sizeof(addr)) != -1) - break; - } while (++i < 100); - - if (i >= 100) { - fprintf(stderr, "Can't find good port, skipped\n"); + if (t_bind_ephemeral_port(s0, &addr)) { + perror("bind"); data->stop = 1; signal_var(&recv_thread_ready); - goto out; + goto err; } + data->port = addr.sin_port; ret = listen(s0, 128); assert(ret != -1); signal_var(&recv_thread_ready); sqe = io_uring_get_sqe(&ring); @@ -154,15 +146,14 @@ void *recv_thread(void *arg) (uint64_t) cqe->user_data, cqe->res, data->expected[idx]); goto err; } io_uring_cqe_seen(&ring, cqe); } -out: signal_var(&recv_thread_done); close(s0); io_uring_queue_exit(&ring); return NULL; err: signal_var(&recv_thread_done); close(s0); -- Ammar Faizi