From patchwork Mon Apr 2 08:20:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: xiaolei li X-Patchwork-Id: 894129 X-Patchwork-Delegate: boris.brezillon@free-electrons.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="H461TttS"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40F4tS0k2Wz9s28 for ; Mon, 2 Apr 2018 18:21:04 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=V7l9sUCasODnCUj2lMzjsXl2WJB0DvThoo18SABOlpw=; b=H461TttSYsZsup IwFDBL00aljQ4krdwz9cvoIxQfxAeDAOfNXZEgQ3YiRmWMbyiKuxml2/D1lyT5hhLy06NupzH233a FxdLyVFGU096fQLAOpHWVEvPRGCyd7qY9PbFDvEgYaDQ++dvE804Qo9OuVEib/mzG/TrIYrcSfvv3 /C/2NZsnGOsnRpnUo0aJiVDfNOb9QLTdNnqnLvJIxU5f0IJeWOSANnwRP4yPK9BPL7Ycbp3h0kR5U m/91kxPb6UlF/c+Is5shdlvihehNppRkC01EV/WFeHcai7nFLW9iyMrw3ogqZnqVwkgfOeFIOeSkV w4ZJAhRjaf+JdVHl2a3A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f2uhx-000420-BY; Mon, 02 Apr 2018 08:20:53 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f2uhd-0003mo-Ik; Mon, 02 Apr 2018 08:20:35 +0000 X-UUID: 92027ea557ad4611aab9a1652fcbcccf-20180402 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 432858587; Mon, 02 Apr 2018 16:20:15 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Mon, 2 Apr 2018 16:20:13 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Mon, 2 Apr 2018 16:20:13 +0800 From: Xiaolei Li To: , Subject: [PATCH] mtd: Add sysfs attribute for mtd OOB available size Date: Mon, 2 Apr 2018 16:20:10 +0800 Message-ID: <1522657210-56833-2-git-send-email-xiaolei.li@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1522657210-56833-1-git-send-email-xiaolei.li@mediatek.com> References: <1522657210-56833-1-git-send-email-xiaolei.li@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-12.5.0.5042-8.2.9001-23758.005 X-TM-AS-Result: No-8.683000-8.000000-10 X-TMASE-MatchedRID: MdSdJxe5grj1nyrqs74iHjTR2TFg0xG3FuNF4lJG6xss/uUAk6xP7GlF 7OhYLlctJKxrZGiKDPjr5CQRYN7wnK6EIEWX9vresK+WWVTsOXVA2uBGtrFNAUYvSDWdWaRhU8j ll7wo+otRUHsj/YINIBnlPjt/L4AXGAdnzrnkM48URSScn+QSXt0H8LFZNFG73Yq8RVaZivVygd Yw8EJB6WX39sgiVJj9QnE12cWlg07DGzi+iBC6cQSv8TR3PQKZ X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.683000-8.000000 X-TMASE-Version: SMEX-12.5.0.5042-8.2.9001-23758.005 X-TMASE-POSTMAN: 2-d; X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180402_012033_747888_30F00B0C X-CRM114-Status: UNSURE ( 8.20 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.3 (+) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (1.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines 1.3 RDNS_NONE Delivered to internal network by a host with no rDNS X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mediatek@lists.infradead.org, xiaolei.li@mediatek.com, linux-mtd@lists.infradead.org, srv_heupstream@mediatek.com Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Expose mtd OOB available size by sysfs file. Then users can get available OOB size by accessing /sys/class/mtd/mtdX/oobavail. Signed-off-by: Xiaolei Li --- Documentation/ABI/testing/sysfs-class-mtd | 8 ++++++++ drivers/mtd/mtdcore.c | 10 ++++++++++ 2 files changed, 18 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-mtd b/Documentation/ABI/testing/sysfs-class-mtd index f34e5923..3bc7c0a 100644 --- a/Documentation/ABI/testing/sysfs-class-mtd +++ b/Documentation/ABI/testing/sysfs-class-mtd @@ -232,3 +232,11 @@ Description: of the parent (another partition or a flash device) in bytes. This attribute is absent on flash devices, so it can be used to distinguish them from partitions. + +What: /sys/class/mtd/mtdX/oobavail +Date: April 2018 +KernelVersion: 4.16 +Contact: linux-mtd@lists.infradead.org +Description: + Number of bytes available for a client to place data into + the out of band area. diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 807d17d..99d9352 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -210,6 +210,15 @@ static ssize_t mtd_oobsize_show(struct device *dev, } static DEVICE_ATTR(oobsize, S_IRUGO, mtd_oobsize_show, NULL); +static ssize_t mtd_oobavail_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mtd_info *mtd = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE, "%lu\n", (unsigned long)mtd->oobavail); +} +static DEVICE_ATTR(oobavail, S_IRUGO, mtd_oobavail_show, NULL); + static ssize_t mtd_numeraseregions_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -327,6 +336,7 @@ static ssize_t mtd_bbtblocks_show(struct device *dev, &dev_attr_writesize.attr, &dev_attr_subpagesize.attr, &dev_attr_oobsize.attr, + &dev_attr_oobavail.attr, &dev_attr_numeraseregions.attr, &dev_attr_name.attr, &dev_attr_ecc_strength.attr,