From patchwork Fri Jan 20 14:43:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory Price X-Patchwork-Id: 645281 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 64970C27C7C for ; Fri, 20 Jan 2023 14:45:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230498AbjATOpS (ORCPT ); Fri, 20 Jan 2023 09:45:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231165AbjATOpQ (ORCPT ); Fri, 20 Jan 2023 09:45:16 -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 94510D0DB6; Fri, 20 Jan 2023 06:44:48 -0800 (PST) Received: by mail-il1-x142.google.com with SMTP id f8so2795954ilj.5; Fri, 20 Jan 2023 06:44:48 -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=LnkI5KpNCjol1eJRa1CeU/Ka3N1fJp1SFPwR8vNOaRqLIo56jlYqGRYpXaJlDi6Pzb f4dI/Qped/yuiW1YvWStBpb75NDAk1VgKzY4hjv0r3WIC/rHd6ZtILpTweCNIOehdyvx BiKQ3i5u2IZSxuhgB8IIkEvtgetqRSmNS5kB6nWjG+gfnvfJAVRkly/EZzT1EU3vkxET C9bYRZBG6kbkHa9GW0YR3bt1m2UpCOZV8eKICKy+3EAlZWwZ0MK9tM66c5dVcFQs6urC zYpA6AM94BfeJczIHlnlHVY/XYUpi5S63DzgQmwdmvYgn44khT4MjnjzmCqif8z+LPan 1rpQ== 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=2uUkoyQ8Gi3oEAPJWTQVrma4CTTIes3uEwBMTs6f27ih8+Ds5eWFA+P2dBwZm18xUb 5n+q573IxaP9tVurxu8xclgykb8tD/UeyXWBUur/GAXhR8VCy3i+4VLPqmVDR/OLLFqQ 5azKxMAyAMS+wqe9ZxiMyq5DF0Pqaqtz8YpbPKH2Jx76eOyVX97a+DjASW98993dvdDG jbsHLrH0cAnPHvTvEroAhAQTrkwJOgVvMPr1/LjFzFgQYnacqlQrgypZVKCz5GRvFiJC 23AbGSv1GQnU060ZkY3NC24Tf5R5RSQbCvtykNIl9cL6lXMDSIyXWMs+Kb8fmTpDArGF qrgA== X-Gm-Message-State: AFqh2kqS6ChHMQzMGH2VMZVc1483YyvBfWPbPbtDe1X4v1KQMTdLSLGe lGZBodfsJP8b0br/vaxDa+dlJqEOR/ZK X-Google-Smtp-Source: AMrXdXt3Yz1hmgZ+mVPQhzOA/jtz7/t+tye693usGwvJflFkDLvhnjzE+eu0rz2Jn2Tc4fSgi9TATQ== X-Received: by 2002:a92:da43:0:b0:30e:f171:660f with SMTP id p3-20020a92da43000000b0030ef171660fmr11011884ilq.31.1674225855361; Fri, 20 Jan 2023 06:44:15 -0800 (PST) Received: from fedora.mshome.net ([104.184.156.161]) by smtp.gmail.com with ESMTPSA id p185-20020a0229c2000000b003a7c47efde0sm1513852jap.11.2023.01.20.06.44.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Jan 2023 06:44:14 -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 v3 2/3] fs/proc/array: Add Syscall User Dispatch to proc status Date: Fri, 20 Jan 2023 09:43:55 -0500 Message-Id: <20230120144356.40717-3-gregory.price@memverge.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230120144356.40717-1-gregory.price@memverge.com> References: <20230120144356.40717-1-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; }