From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8792C33CAF for ; Mon, 20 Jan 2020 01:06:31 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7ADB0206B7 for ; Mon, 20 Jan 2020 01:06:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="k0eksubK" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7ADB0206B7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=allwinnertech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=mPnPCbiwMhahvj04jUlNPTI33RGO/Gg6zpLou7Nzihw=; b=k0eksubKc4aqX/xrmoCl7X7LeM iqCnSObjT96D8UZkB1ZopcnGWPbr+05fyFhz+LOWC7n6VXiMVCIn9PJ67rPRWb4C0duIRJGa/JGGS HNhLDZh55uX7cZ4OnqJHat3vinuniDkjgPj5rcppC5g4r5YSBkTIepBgnKUBz1pHCWQHIaqDQbUsX 9b4Zsmzhhpn1htE/r946ds6xAHNcR+8mPN8jkgzBH3JEMXP7K1vKo6rvgd0ss9RL8mJQa2LPPM44S zuLA6er3gi+uppaoCetLRLFm6Pmi4KfYfDKyf1h5qdHtC1EVI86KYHmTaPvJmG5AhYV122mU5ov/p CKczYhsg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1itLWF-0004cp-GF; Mon, 20 Jan 2020 01:06:19 +0000 Received: from smtp2207-205.mail.aliyun.com ([121.197.207.205]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1itLUD-0001hH-Og for linux-mtd@lists.infradead.org; Mon, 20 Jan 2020 01:04:17 +0000 X-Alimail-AntiSpam: AC=CONTINUE; BC=0.06717829|-1; CH=green; DM=CONTINUE|CONTINUE|true|0.275125-0.0157719-0.709104; DS=CONTINUE|ham_system_inform|0.0526277-0.000678506-0.946694; FP=0|0|0|0|0|-1|-1|-1; HT=e02c03294; MF=liaoweixiong@allwinnertech.com; NM=1; PH=DS; RN=17; RT=17; SR=0; TI=SMTPD_---.Gf.OYKf_1579482234; Received: from PC-liaoweixiong.allwinnertech.com(mailfrom:liaoweixiong@allwinnertech.com fp:SMTPD_---.Gf.OYKf_1579482234) by smtp.aliyun-inc.com(10.147.42.16); Mon, 20 Jan 2020 09:04:09 +0800 From: WeiXiong Liao To: Kees Cook , Anton Vorontsov , Colin Cross , Tony Luck , Jonathan Corbet , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mauro Carvalho Chehab , "David S. Miller" , Rob Herring , Greg Kroah-Hartman , Jonathan Cameron , WeiXiong Liao Subject: [PATCH v1 10/11] blkoops: add interface for dirver to get information of blkoops Date: Mon, 20 Jan 2020 09:03:52 +0800 Message-Id: <1579482233-2672-11-git-send-email-liaoweixiong@allwinnertech.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1579482233-2672-1-git-send-email-liaoweixiong@allwinnertech.com> References: <1579482233-2672-1-git-send-email-liaoweixiong@allwinnertech.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200119_170413_999746_C19D75E7 X-CRM114-Status: GOOD ( 11.24 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org It's one of a series of patches for adaptive to MTD device. MTD device need to check size of recorder and get mtddev index to verify which mtd device to use. All it needs is defined in blkoops. So, there should be a interface for MTD driver to get all information it need. Signed-off-by: WeiXiong Liao --- fs/pstore/blkoops.c | 47 ++++++++++++++++++++++++++++++++++++----------- include/linux/blkoops.h | 10 ++++++++++ 2 files changed, 46 insertions(+), 11 deletions(-) diff --git a/fs/pstore/blkoops.c b/fs/pstore/blkoops.c index 6b74189e5820..a2f1e31488bb 100644 --- a/fs/pstore/blkoops.c +++ b/fs/pstore/blkoops.c @@ -117,6 +117,20 @@ #define DEFAULT_BLKDEV "" #endif +#define check_size(name, defsize, alignsize) ({ \ + long _##name_ = (name); \ + if ((name) < 0) \ + _##name_ = (defsize); \ + _##name_ = _##name_ <= 0 ? 0 : (_##name_ * 1024); \ + if (_##name_ & (alignsize - 1)) { \ + pr_info(#name " must align to %d\n", \ + (alignsize)); \ + _##name_ = ALIGN(name, alignsize); \ + } \ + _##name_; \ +}) + + /** * register device to blkoops * @@ -148,18 +162,10 @@ int blkoops_register_device(struct blkoops_device *bo_dev) bo_dev->flags = BLKOOPS_DEV_SUPPORT_ALL; #define verify_size(name, defsize, alignsize, enable) { \ long _##name_; \ - if (!(enable)) \ - _##name_ = 0; \ - else if ((name) >= 0) \ - _##name_ = (name); \ + if (enable) \ + _##name_ = check_size(name, defsize, alignsize);\ else \ - _##name_ = (defsize); \ - _##name_ = _##name_ <= 0 ? 0 : (_##name_ * 1024); \ - if (_##name_ & (alignsize - 1)) { \ - pr_info(#name " must align to %d\n", \ - (alignsize)); \ - _##name_ = ALIGN(name, alignsize); \ - } \ + _##name_ = 0; \ name = _##name_ / 1024; \ bzinfo->name = _##name_; \ } @@ -460,6 +466,25 @@ int blkoops_blkdev_info(dev_t *devt, sector_t *nr_sects, sector_t *start_sect) } EXPORT_SYMBOL_GPL(blkoops_blkdev_info); +/* get information of blkoops */ +int blkoops_info(struct blkoops_info *info) +{ + if (!blkdev[0] && strlen(DEFAULT_BLKDEV)) + snprintf(blkdev, 80, "%s", DEFAULT_BLKDEV); + + memcpy(info->device, blkdev, 80); + info->dump_oops = !!(dump_oops < 0 ? DEFAULT_DUMP_OOPS : dump_oops); + + info->dmesg_size = check_size(dmesg_size, DEFAULT_DMESG_SIZE, 4096); + info->pmsg_size = check_size(pmsg_size, DEFAULT_PMSG_SIZE, 4096); + info->ftrace_size = check_size(ftrace_size, DEFAULT_FTRACE_SIZE, 4096); + info->console_size = check_size(console_size, DEFAULT_CONSOLE_SIZE, + 4096); + + return 0; +} +EXPORT_SYMBOL_GPL(blkoops_info); + MODULE_LICENSE("GPL"); MODULE_AUTHOR("WeiXiong Liao "); MODULE_DESCRIPTION("Wrapper for Pstore BLK with Oops logger"); diff --git a/include/linux/blkoops.h b/include/linux/blkoops.h index 11cb3036ad5f..ea56f3f92360 100644 --- a/include/linux/blkoops.h +++ b/include/linux/blkoops.h @@ -81,4 +81,14 @@ int blkoops_register_blkdev(unsigned int major, unsigned int flags, void blkoops_unregister_blkdev(unsigned int major); int blkoops_blkdev_info(dev_t *devt, sector_t *nr_sects, sector_t *start_sect); +struct blkoops_info { + int dump_oops; + char device[80]; + unsigned long dmesg_size; + unsigned long pmsg_size; + unsigned long console_size; + unsigned long ftrace_size; +}; +int blkoops_info(struct blkoops_info *info); + #endif -- 1.9.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/