From patchwork Wed Jan 18 20:10:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory Price X-Patchwork-Id: 643915 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 74FBDC38147 for ; Wed, 18 Jan 2023 20:11:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229865AbjARULU (ORCPT ); Wed, 18 Jan 2023 15:11:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229612AbjARULM (ORCPT ); Wed, 18 Jan 2023 15:11:12 -0500 Received: from mail-il1-x142.google.com (mail-il1-x142.google.com [IPv6:2607:f8b0:4864:20::142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80F865DC15; Wed, 18 Jan 2023 12:11:10 -0800 (PST) Received: by mail-il1-x142.google.com with SMTP id o15so81895ill.11; Wed, 18 Jan 2023 12:11:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; 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=fqgqlvxl2/AjHmd8bF7KdCJg7y96KUb9pTAZ52R5/2g=; b=bdrvtx5ZNhgIk9MmhFukQ/LPkMhBhfAROXqqep7fDgGl3OA8JifOfMctbfukQx85JG 07Jfp9smBT8tMrHecHqxzm1W5SqERHQekZm6Am19mR/lb7pai0hkqsQXkL8cPjfqnPD6 j2gR6LVkL89vjpWKYGGjfDt7cSemJgE5/vORS9PEpLXQJCkwqemjGVAHRyzPVEtapADa 5MSRaZ28BuVhOZIGctLicIlYVz0oBmZlsctPpKfFYVIJGvqETPofsTc4yNaPl3isfpYo puDeV9j19qqVYnoRT9o7Ezhq1ucG1hDr6Ngn56nPtTLzaFk7MlsERx37m/1TdFuJhC/2 NGXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=fqgqlvxl2/AjHmd8bF7KdCJg7y96KUb9pTAZ52R5/2g=; b=2FI4EOuiZhMN+nhw8i9X62jC7qFKGb0K4Utz5SVhIVvkSLwxbnZz2kvjGWeoOMZgkU Tj8fkRj9PfBXxJjileOrSOTSrSQOWRgFuYMqNttkdV3Db6fw/bVqjyzORQelWwZHmR/B kkfuHIy4boOob83Dn+Gw/bVaxUHL4uXYqg4cTMKXEJI2/2w4X3JU5q+fr6BzZwCevgGw Mpu8TJVdk27MY8i12fE1nl9wdlbdhNp1kKvqTVPa7rdw51MAdRUMa6AS7W2s7fn4Lmd0 vHRcaG136o/FJGlhwF9W06gh+sDAO9LbohHLMHwRWIQ0FUUj78ihyBOrLlqA7f8ctUBa y9/A== X-Gm-Message-State: AFqh2koXDOImSWx8dJZs2l61WyXyHiisFyagA5VD+skAgVylB4cJ/SCG fCvY6TPbja3uK2B49ntgCX4BdPYR7+kq X-Google-Smtp-Source: AMrXdXs65z3mHMdccDSgpcyzyox+lwVkGOM8Ivj9ALWa7rq82jvgbCrnDGVjJrWFMLOuPbugow67oA== X-Received: by 2002:a05:6e02:2186:b0:30f:3704:3e18 with SMTP id j6-20020a056e02218600b0030f37043e18mr2022430ila.25.1674072669393; Wed, 18 Jan 2023 12:11:09 -0800 (PST) Received: from fedora.mshome.net ([104.184.156.161]) by smtp.gmail.com with ESMTPSA id i5-20020a92c945000000b0030bfbc121a1sm10299998ilq.79.2023.01.18.12.11.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jan 2023 12:11:09 -0800 (PST) From: Gregory Price X-Google-Original-From: Gregory Price To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, krisman@collabora.com, tglx@linutronix.de, luto@kernel.org, oleg@redhat.com, peterz@infradead.org, ebiederm@xmission.com, akpm@linux-foundation.org, adobriyan@gmail.com, corbet@lwn.net, shuah@kernel.org, Gregory Price Subject: [PATCH 2/3] fs/proc/array: Add Syscall User Dispatch to proc status Date: Wed, 18 Jan 2023 15:10:54 -0500 Message-Id: <20230118201055.147228-3-gregory.price@memverge.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230118201055.147228-1-gregory.price@memverge.com> References: <20230118201055.147228-1-gregory.price@memverge.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org If a dispatch selector has been configured for Syscall User Dispatch, report Syscall User Dispath as configured in proc/status. This provides an indicator to userland checkpoint/restart software that it much manage special signal conditions (similar to SECCOMP) Signed-off-by: Gregory Price --- fs/proc/array.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/proc/array.c b/fs/proc/array.c index 49283b8103c7..c85cdb4c137c 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -428,6 +428,13 @@ static inline void task_thp_status(struct seq_file *m, struct mm_struct *mm) seq_printf(m, "THP_enabled:\t%d\n", thp_enabled); } +static inline void task_syscall_user_dispatch(struct seq_file *m, + struct task_struct *p) +{ + seq_put_decimal_ull(m, "\nSyscall_user_dispatch:\t", + (p->syscall_dispatch.selector != NULL)); +} + int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { @@ -451,6 +458,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, task_cpus_allowed(m, task); cpuset_task_status_allowed(m, task); task_context_switch_counts(m, task); + task_syscall_user_dispatch(m, task); return 0; }