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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 77DC5C2BB9A for ; Tue, 15 Dec 2020 12:30:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B0F4224F4 for ; Tue, 15 Dec 2020 12:30:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728727AbgLOMQA (ORCPT ); Tue, 15 Dec 2020 07:16:00 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:27794 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728651AbgLOMPw (ORCPT ); Tue, 15 Dec 2020 07:15:52 -0500 X-IronPort-AV: E=Sophos;i="5.78,420,1599494400"; d="scan'208";a="102420200" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 15 Dec 2020 20:15:00 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id 5EFE84CE600E; Tue, 15 Dec 2020 20:14:57 +0800 (CST) Received: from G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.203) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 15 Dec 2020 20:14:56 +0800 Received: from localhost.localdomain (10.167.225.141) by G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 15 Dec 2020 20:14:56 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , , Subject: [RFC PATCH v3 6/9] pmem: Implement ->corrupted_range() for pmem driver Date: Tue, 15 Dec 2020 20:14:11 +0800 Message-ID: <20201215121414.253660-7-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201215121414.253660-1-ruansy.fnst@cn.fujitsu.com> References: <20201215121414.253660-1-ruansy.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-yoursite-MailScanner-ID: 5EFE84CE600E.AEF68 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Obtain the superblock of a pmem disk, and call filesystem's ->corrupted_range() to handle the corrupted data. Signed-off-by: Shiyang Ruan --- block/genhd.c | 12 ++++++++++++ drivers/nvdimm/pmem.c | 24 ++++++++++++++++++++++++ include/linux/genhd.h | 1 + 3 files changed, 37 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index 9387f050c248..436adce123b2 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1058,6 +1058,18 @@ struct block_device *bdget_disk(struct gendisk *disk, int partno) } EXPORT_SYMBOL(bdget_disk); +struct block_device *bdget_disk_sector(struct gendisk *disk, sector_t sector) +{ + struct block_device *bdev = NULL; + struct hd_struct *part = disk_map_sector_rcu(disk, sector); + + if (part) + bdev = bdget_part(part); + + return bdev; +} +EXPORT_SYMBOL(bdget_disk_sector); + /* * print a full list of all partitions - intended for places where the root * filesystem can't be mounted and thus to give the victim some idea of what diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 4a114937c43b..4688bff19c20 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -253,6 +253,29 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, return blk_status_to_errno(rc); } +static int pmem_corrupted_range(struct gendisk *disk, struct block_device *bdev, + loff_t disk_offset, size_t len, void *data) +{ + struct super_block *sb; + loff_t bdev_offset; + sector_t disk_sector = disk_offset >> SECTOR_SHIFT; + int rc = 0; + + bdev = bdget_disk_sector(disk, disk_sector); + if (!bdev) + return -ENODEV; + + bdev_offset = (disk_sector - get_start_sect(bdev)) << SECTOR_SHIFT; + sb = get_super(bdev); + if (sb && sb->s_op->corrupted_range) { + rc = sb->s_op->corrupted_range(sb, bdev, bdev_offset, len, data); + drop_super(sb); + } + + bdput(bdev); + return rc; +} + /* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */ __weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) @@ -281,6 +304,7 @@ static const struct block_device_operations pmem_fops = { .owner = THIS_MODULE, .submit_bio = pmem_submit_bio, .rw_page = pmem_rw_page, + .corrupted_range = pmem_corrupted_range, }; static int pmem_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 03da3f603d30..ed06209008b8 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -303,6 +303,7 @@ static inline void add_disk_no_queue_reg(struct gendisk *disk) extern void del_gendisk(struct gendisk *gp); extern struct gendisk *get_gendisk(dev_t dev, int *partno); extern struct block_device *bdget_disk(struct gendisk *disk, int partno); +extern struct block_device *bdget_disk_sector(struct gendisk *disk, sector_t sector); extern void set_device_ro(struct block_device *bdev, int flag); extern void set_disk_ro(struct gendisk *disk, int flag); -- 2.29.2