From patchwork Wed Jul 12 16:20:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 13310729 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 4B94FEB64DD for ; Wed, 12 Jul 2023 16:22:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233319AbjGLQWE (ORCPT ); Wed, 12 Jul 2023 12:22:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232355AbjGLQVg (ORCPT ); Wed, 12 Jul 2023 12:21:36 -0400 Received: from mail-io1-xd2c.google.com (mail-io1-xd2c.google.com [IPv6:2607:f8b0:4864:20::d2c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B19932D5F for ; Wed, 12 Jul 2023 09:20:35 -0700 (PDT) Received: by mail-io1-xd2c.google.com with SMTP id ca18e2360f4ac-785ccd731a7so75963739f.0 for ; Wed, 12 Jul 2023 09:20:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20221208.gappssmtp.com; s=20221208; t=1689178832; x=1689783632; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=77utXKVr289Xtr5SK547E9baZFV+ka7R8kIV3jn3wns=; b=gI7rciFjThQqgqqmYCaizMxtrpZSxtzzwsi+S4mnL2b5gO6BE9BzQPtDNH/9CnF1R2 TYsXynQEGEhMXgqSFBIM0A+iqu1UDPWYs12q2bd/tt0VFJAGL57hR6qvo/h/CmfGDniL Iq9oXIMhd347hbYW0TO+mD1BeprT8njB6m1kIWXvitA8yTVsonbh9Cp+iIP1ew+yPVko lBhPsCWnpvbHm9FMXAHpbMtI9sBUBC0Ko3W2X04aQziXeH5Fozi4QVVWyhMwrQ4tUT5o eD71S3XbQ2wgGPMoqSoi6AdlIQlnbPHk/YsuhIdOQJkgt/luk+Xr2sL3LPqrwph437eG PzDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689178832; x=1689783632; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=77utXKVr289Xtr5SK547E9baZFV+ka7R8kIV3jn3wns=; b=jxtke17P8VGApNFBVw3Uf3ULPyozeAASj5V3FibZQOtv77hM7JNDYrTnmPNtbyR2bX xUKGnx3ZbUpPJQyDU/Deu701MuVwGH1opXJ4saohpIgLEccRCCuIXbqtAMv2SGd1mK56 stIe6Dd0iLNzLJF6BGdd3pDxFlHO4QrDoVQpa8NhyvzT05bUsLdL7hVK5b1mzDehqPdR ejHauKZIq/lPZvauljZ9KTto2FATM/xCydDzAC4u5ntox/UjJtBvCcEGWRXU0TUL4cHb g/yozcfn77QhL7zgVE5Fh/PgwFTlZo4diXjvg/gHsUlHSvHM2CIQs6vsrxohz6knwqGu yVuQ== X-Gm-Message-State: ABy/qLZiVNRSPiaC24pfnGZ9bEgdqIXgCbXD7XJjIZWgUicQnWlPF9CY AaXZXXnZbK8qS1cC7pq3ZNK+r5BkiBOuTMZl3gk= X-Google-Smtp-Source: APBJJlH06yLgDahSs0qD1tZReckWNo0TVLhdg4jwmBuajcUVoiSOQHr6O3rmk1lUs1zb3/yCDPdADQ== X-Received: by 2002:a05:6602:2f14:b0:783:6ec1:65f6 with SMTP id q20-20020a0566022f1400b007836ec165f6mr24774001iow.1.1689178831951; Wed, 12 Jul 2023 09:20:31 -0700 (PDT) Received: from localhost.localdomain ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id x24-20020a029718000000b0042aec33bc26sm1328775jai.18.2023.07.12.09.20.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jul 2023 09:20:31 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, peterz@infradead.org, andres@anarazel.de, Jens Axboe Subject: [PATCH 6/8] futex: make futex_parse_waitv() available as a helper Date: Wed, 12 Jul 2023 10:20:15 -0600 Message-Id: <20230712162017.391843-7-axboe@kernel.dk> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230712162017.391843-1-axboe@kernel.dk> References: <20230712162017.391843-1-axboe@kernel.dk> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org To make it more generically useful, augment it with allowing the caller to pass in the wake handler and wake data. Convert the futex_waitv() syscall, passing in the default handlers. Signed-off-by: Jens Axboe --- kernel/futex/futex.h | 5 +++++ kernel/futex/syscalls.c | 14 ++++++++++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h index 24180a95bdc8..f6598d8451fb 100644 --- a/kernel/futex/futex.h +++ b/kernel/futex/futex.h @@ -285,6 +285,11 @@ struct futex_vector { struct futex_q q; }; +extern int futex_parse_waitv(struct futex_vector *futexv, + struct futex_waitv __user *uwaitv, + unsigned int nr_futexes, futex_wake_fn *wake, + void *wake_data); + extern int futex_wait_multiple(struct futex_vector *vs, unsigned int count, struct hrtimer_sleeper *to); diff --git a/kernel/futex/syscalls.c b/kernel/futex/syscalls.c index 0b63d5bcdc77..fc3cdd0fefab 100644 --- a/kernel/futex/syscalls.c +++ b/kernel/futex/syscalls.c @@ -184,12 +184,15 @@ SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, * @futexv: Kernel side list of waiters to be filled * @uwaitv: Userspace list to be parsed * @nr_futexes: Length of futexv + * @wake: Wake to call when futex is woken + * @wake_data: Data for the wake handler * * Return: Error code on failure, 0 on success */ -static int futex_parse_waitv(struct futex_vector *futexv, - struct futex_waitv __user *uwaitv, - unsigned int nr_futexes) +int futex_parse_waitv(struct futex_vector *futexv, + struct futex_waitv __user *uwaitv, + unsigned int nr_futexes, futex_wake_fn *wake, + void *wake_data) { struct futex_waitv aux; unsigned int i; @@ -208,6 +211,8 @@ static int futex_parse_waitv(struct futex_vector *futexv, futexv[i].w.val = aux.val; futexv[i].w.uaddr = aux.uaddr; futexv[i].q = futex_q_init; + futexv[i].q.wake = wake; + futexv[i].q.wake_data = wake_data; } return 0; @@ -284,7 +289,8 @@ SYSCALL_DEFINE5(futex_waitv, struct futex_waitv __user *, waiters, goto destroy_timer; } - ret = futex_parse_waitv(futexv, waiters, nr_futexes); + ret = futex_parse_waitv(futexv, waiters, nr_futexes, futex_wake_mark, + NULL); if (!ret) ret = futex_wait_multiple(futexv, nr_futexes, timeout ? &to : NULL);