From patchwork Mon Oct 10 14:55:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrea Cervesato X-Patchwork-Id: 1688100 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it (client-ip=213.254.12.146; helo=picard.linux.it; envelope-from=ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=suse.com header.i=@suse.com header.a=rsa-sha256 header.s=susede1 header.b=g6sBpDqn; dkim-atps=neutral Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4MmMSl3tBrz23jn for ; Tue, 11 Oct 2022 01:56:55 +1100 (AEDT) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 94DF73CAE79 for ; Mon, 10 Oct 2022 16:56:53 +0200 (CEST) X-Original-To: ltp@lists.linux.it Delivered-To: ltp@picard.linux.it Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [217.194.8.6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 8912F3CAE54 for ; Mon, 10 Oct 2022 16:56:52 +0200 (CEST) Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id 24D281400B80 for ; Mon, 10 Oct 2022 16:56:51 +0200 (CEST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id EE2EE21979; Mon, 10 Oct 2022 14:56:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1665413810; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=3WfTT3XrMRQy5N+3/4TY/CO7fg85gF0m11+Tg1MBiy8=; b=g6sBpDqnJNu/xMK9fvVdVS4cn6PjYH7UZ5I+rVjJNir0exhDVS/89QqUBaChZZ4FE2YmMR kouAD7ZKdy+WR3pgWup54qbYZcTbd1OIzKUq59pl/q9WybYgc4KrHWkToT6QtOZYIoVGmx UqbwTalFyRXQ+IUhQHTwkKtpmpy+CQg= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 5CA1713ACA; Mon, 10 Oct 2022 14:56:50 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id DvUGDbIyRGNiKQAAMHmgww (envelope-from ); Mon, 10 Oct 2022 14:56:50 +0000 To: ltp@lists.linux.it Date: Mon, 10 Oct 2022 16:55:34 +0200 Message-Id: <20221010145534.4857-1-andrea.cervesato@suse.com> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.102.4 at in-6.smtp.seeweb.it X-Virus-Status: Clean X-Spam-Status: No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=disabled version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on in-6.smtp.seeweb.it Subject: [LTP] [PATCH v2] Add epoll_wait06 test X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Andrea Cervesato via ltp From: Andrea Cervesato Reply-To: Andrea Cervesato Errors-To: ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it Sender: "ltp" This test verifies EPOLLET functionality. Signed-off-by: Andrea Cervesato --- .../kernel/syscalls/epoll_wait/.gitignore | 1 + .../kernel/syscalls/epoll_wait/epoll_wait06.c | 97 +++++++++++++++++++ 2 files changed, 98 insertions(+) create mode 100644 testcases/kernel/syscalls/epoll_wait/epoll_wait06.c diff --git a/testcases/kernel/syscalls/epoll_wait/.gitignore b/testcases/kernel/syscalls/epoll_wait/.gitignore index ab5a9c010..8c5ed7c5c 100644 --- a/testcases/kernel/syscalls/epoll_wait/.gitignore +++ b/testcases/kernel/syscalls/epoll_wait/.gitignore @@ -3,3 +3,4 @@ epoll_wait02 epoll_wait03 epoll_wait04 epoll_wait05 +epoll_wait06 diff --git a/testcases/kernel/syscalls/epoll_wait/epoll_wait06.c b/testcases/kernel/syscalls/epoll_wait/epoll_wait06.c new file mode 100644 index 000000000..20f6233c9 --- /dev/null +++ b/testcases/kernel/syscalls/epoll_wait/epoll_wait06.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2022 SUSE LLC Andrea Cervesato + */ + +/*\ + * [Description] + * + * Verify that edge triggered behavior is correctly handled by epoll. + * + * [Algorithm] + * + * 1. The file descriptor that represents the read side of a pipe (rfd) is + * registered on the epoll instance. + * 2. A pipe writer writes 2 kB of data on the write side of the pipe. + * 3. A call to epoll_wait(2) is done that will return rfd as a ready file + * descriptor. + * 4. The pipe reader reads 1 kB of data from rfd. + * 5. A call to epoll_wait(2) should fail because there's data left to read. + */ + +#include +#include +#include "tst_test.h" + +#define WRITE_SIZE 2048 +#define READ_SIZE (WRITE_SIZE / 2) + +static int fds[2]; +static int epfd; + +static void cleanup(void) +{ + if (epfd > 0) + SAFE_CLOSE(epfd); + + if (fds[0] > 0) + SAFE_CLOSE(fds[0]); + + if (fds[1] > 0) + SAFE_CLOSE(fds[1]); +} + +static void run(void) +{ + int res; + char buff[WRITE_SIZE]; + struct epoll_event evt_receive; + struct epoll_event evt_request; + + SAFE_PIPE(fds); + + evt_request.events = EPOLLIN | EPOLLET; + evt_request.data.fd = fds[0]; + + epfd = epoll_create(2); + if (epfd == -1) + tst_brk(TBROK | TERRNO, "fail to create epoll instance"); + + tst_res(TINFO, "Polling channel with EPOLLET"); + + res = epoll_ctl(epfd, EPOLL_CTL_ADD, fds[0], &evt_request); + if (res == -1) + tst_brk(TBROK | TERRNO, "epoll_ctl failure"); + + tst_res(TINFO, "Write bytes on channel"); + + memset(buff, 'a', WRITE_SIZE); + SAFE_WRITE(0, fds[1], buff, WRITE_SIZE); + + res = epoll_wait(epfd, &evt_receive, 1, 2000); + if (res <= 0) { + tst_res(TFAIL | TERRNO, "epoll_wait() returned %i", res); + goto close; + } + + if ((evt_receive.events & EPOLLIN) == 0) { + tst_res(TFAIL, "No data received"); + goto close; + } + + tst_res(TINFO, "Received EPOLLIN event. Read half bytes from channel"); + + memset(buff, 0, READ_SIZE); + SAFE_READ(1, evt_receive.data.fd, buff, READ_SIZE); + + TST_EXP_EQ_LI(epoll_wait(epfd, &evt_receive, 1, 10), 0); + +close: + SAFE_CLOSE(fds[0]); + SAFE_CLOSE(fds[1]); +} + +static struct tst_test test = { + .cleanup = cleanup, + .test_all = run, +};