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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED,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 463FBC352A5 for ; Fri, 7 Feb 2020 12:26:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 227BB21775 for ; Fri, 7 Feb 2020 12:26:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727570AbgBGM0h (ORCPT ); Fri, 7 Feb 2020 07:26:37 -0500 Received: from smtp2207-205.mail.aliyun.com ([121.197.207.205]:47513 "EHLO smtp2207-205.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727458AbgBGM0T (ORCPT ); Fri, 7 Feb 2020 07:26:19 -0500 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.06718217|-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=e02c03300;MF=liaoweixiong@allwinnertech.com;NM=1;PH=DS;RN=17;RT=17;SR=0;TI=SMTPD_---.GlaQplc_1581078351; Received: from PC-liaoweixiong.allwinnertech.com(mailfrom:liaoweixiong@allwinnertech.com fp:SMTPD_---.GlaQplc_1581078351) by smtp.aliyun-inc.com(10.147.41.137); Fri, 07 Feb 2020 20:26:08 +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 Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org Subject: [PATCH v2 10/11] blkoops: add interface for dirver to get information of blkoops Date: Fri, 7 Feb 2020 20:25:54 +0800 Message-Id: <1581078355-19647-11-git-send-email-liaoweixiong@allwinnertech.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1581078355-19647-1-git-send-email-liaoweixiong@allwinnertech.com> References: <1581078355-19647-1-git-send-email-liaoweixiong@allwinnertech.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 7cf4731e52f7..4fc6ac4c69c5 100644 --- a/fs/pstore/blkoops.c +++ b/fs/pstore/blkoops.c @@ -102,6 +102,20 @@ #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 * @@ -133,18 +147,10 @@ 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_; \ } @@ -445,6 +451,25 @@ 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