Received: by 10.213.65.68 with SMTP id h4csp142021imn; Mon, 19 Mar 2018 22:52:50 -0700 (PDT) X-Google-Smtp-Source: AG47ELsHBdaT40S5F6sOHBgqmGHvF+35zRdfFGs5OGHDYgBBTAwHmp4MkqBY5xEznEW8lJk+OSMi X-Received: by 10.98.37.132 with SMTP id l126mr12710580pfl.102.1521525170480; Mon, 19 Mar 2018 22:52:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1521525170; cv=none; d=google.com; s=arc-20160816; b=Cj4x5oD/KY/iNMI6Wi11NXJcamrOuKqq6rievXGF365/xZbN7ACgm/94Yj3GKuN9xU VwgQY9FGPQj7yGBA9calibXijfk0lf8AUyYECFbkY95cNVMCmZomfm2Zb5p/2dPAw9la EZhSKHtn3CbVXTg/TW2dAbLD787bh6xqzFT93goI21ZqLuckzRUI0ToJuowDrSRopCe3 UwMr6nSJ8Pabc1vjnKBBMhXBOx2j70Poov5qrAlY/AX5McrDD/MfWmBo1KzD4sdWaTVU 8iwY0BKIhy+svlBLRWRwnNOZ9r4OopWqENSOwdU7Q5LpSYP9JKetN3xVPPot41+i7vbe mmZg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=kGLUTaa9cNyPmec7M/qp4WBOMgI4pCcQamWPP5kxEAM=; b=eDGRcUDVCe403ja5yZdTMHYJHGtOsKlHqcnKzkb78vNIcK7NRs+SkxaABblVcGVYWu BeFSo9zodwd//zf3PBZtpVek8LRsU22LBNCLk78L7wu9Sqrf7V0mNz4AFOphLWg/XJBR j02XKgJ2CfsrNyDB1DFDKQqWQi5DUVC3vY0gUQm+py9EtHdULvFPAJF+L3MJZ9Lwd/bo rS7lIHqkTBq1Z4dhm/cM7J58URfuJApnQrKoMiLukdtrSK+G3yIWZAtfAZbOKYWvONjZ 4/iSMQqtlRiHHTZny/C6f0rcCQYN2YKGvpupGj+2869FLYIgqfEMMWT8mznFm9/5aa7h niZQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=V7DcYq3A; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a34-v6si955451pld.8.2018.03.19.22.52.35; Mon, 19 Mar 2018 22:52:50 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=V7DcYq3A; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751390AbeCTFvo (ORCPT + 99 others); Tue, 20 Mar 2018 01:51:44 -0400 Received: from mail-io0-f193.google.com ([209.85.223.193]:34578 "EHLO mail-io0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750888AbeCTFvm (ORCPT ); Tue, 20 Mar 2018 01:51:42 -0400 Received: by mail-io0-f193.google.com with SMTP id r18so848845ioa.1; Mon, 19 Mar 2018 22:51:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=kGLUTaa9cNyPmec7M/qp4WBOMgI4pCcQamWPP5kxEAM=; b=V7DcYq3Af62B1lAZyoD5V6Xy8rF8192VX3CrztTDT1mAIWG8NSxUWfkc8qFEOq1JPy W3mvPbEwoqZdmAArexOOpazRbesEA4eoIB1++DyQQ+Edu8hQmppJgv9z3k/mIdyhnSJG 1kkOKKfvImNVwhLet9591JJ0yZY5C9EPLbhYyeqHB9mZ1WywwQsAcvLJfEMIbwWeh1Ad WrjsHqp4qEzsgr5ot0d817cAEzCNugGKaENsgahk0gMe98axYAu10HEd3CQ9stCNLZvV pmxlWcDTgzY9hgFCCqrFiwdMZpDRRQUeqqtoYrfgDascMaRkWKPp0oK36yPMPdldjjVZ sUjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=kGLUTaa9cNyPmec7M/qp4WBOMgI4pCcQamWPP5kxEAM=; b=nPzC/Xuew3AchXw1mgfO+q3N6z9svvSqBndrJk1biPjPK4MB08AqEh4s/hrcRftPhD x6/sqKlBT01CmnOZQPQWKdqXe7mTIu7B5tq6vqzpp8hSWMphIeLaVIi8DjoVQvBmO/GM hHYQTrpceub0zMHvcGSZ7YzYxWVox7TYCIYPxlZMW/d35zhzEvd6FTsSVvjruMlMPShQ OSczznlS22Din3iRNdgg9Ma+FU+FR/+z3INnV+ajxOHzxhtfvE/IoEYNAlsoWlwEeqrp I7p1mdzxAvuuFCpfuKCts9Gq3Ki1JDMrG9X0wolrlvQfzl8GVEQDics8iDXKbQcxsP0o vP4w== X-Gm-Message-State: AElRT7HR2J05Cl7rVvxTx7LzOlQ2mUFi4aG6eWppJ0VaoQ2DMX/+WDUU ZCnrpkbRW+AVAzU3N+xyd8c= X-Received: by 10.107.138.193 with SMTP id c62mr14254314ioj.280.1521525101298; Mon, 19 Mar 2018 22:51:41 -0700 (PDT) Received: from linux-l9pv.suse ([134.159.103.118]) by smtp.gmail.com with ESMTPSA id s4-v6sm492839ita.36.2018.03.19.22.51.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 19 Mar 2018 22:51:40 -0700 (PDT) From: "Lee, Chun-Yi" X-Google-Original-From: "Lee, Chun-Yi" To: "Rafael J . Wysocki" Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, "Lee, Chun-Yi" , Len Brown Subject: [PATCH v2] ACPI / scan: Send the change uevent with offine environmental data Date: Tue, 20 Mar 2018 13:51:26 +0800 Message-Id: <20180320055126.8671-1-jlee@suse.com> X-Mailer: git-send-email 2.12.3 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In current design of ACPI container offline, Kernel emits KOBJ_CHANGE uevent to user space to indidate that the ejection of the container was triggered by platform. (caa73ea15 patch) A pure KOBJ_CHANGE uevent is not enough for user space to identify the purpose. For example, a "udevadm trigger" command can also be used to emit change event to all udev rules. A udev rule can not identify that the event is from kernel for offline or from udevadm for other purpose. Then the offline action in udev rule may also be triggered by udevadm tool. So, similar to the change uevent of dock, kernel sends the KOBJ_CHANGE uevent with a offline environmental data to indicate purpose. It's useful by udev rule for using ENV{EVENT} filter. v2: Fix build warning for the environmental string Cc: "Rafael J. Wysocki" Cc: Len Brown Acked-by: Michal Hocko Tested-by: Michal Hocko Signed-off-by: "Lee, Chun-Yi" --- drivers/acpi/scan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 8e63d93..490498e 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -116,6 +116,7 @@ bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) { struct acpi_device_physical_node *pn; bool offline = true; + char *envp[] = { "EVENT=offline", NULL }; /* * acpi_container_offline() calls this for all of the container's @@ -126,7 +127,7 @@ bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) list_for_each_entry(pn, &adev->physical_node_list, node) if (device_supports_offline(pn->dev) && !pn->dev->offline) { if (uevent) - kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); + kobject_uevent_env(&pn->dev->kobj, KOBJ_CHANGE, envp); offline = false; break; -- 2.10.2