From patchwork Mon Feb 8 10:55:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ruan Shiyang X-Patchwork-Id: 12074831 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=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 84E2CC433E0 for ; Mon, 8 Feb 2021 10:55:54 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (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 23AAE64E7A for ; Mon, 8 Feb 2021 10:55:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 23AAE64E7A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 2B09B100EB342; Mon, 8 Feb 2021 02:55:53 -0800 (PST) Received-SPF: None (mailfrom) identity=mailfrom; client-ip=183.91.158.132; helo=heian.cn.fujitsu.com; envelope-from=ruansy.fnst@cn.fujitsu.com; receiver= Received: from heian.cn.fujitsu.com (mail.cn.fujitsu.com [183.91.158.132]) by ml01.01.org (Postfix) with ESMTP id B9E99100EB329 for ; Mon, 8 Feb 2021 02:55:49 -0800 (PST) X-IronPort-AV: E=Sophos;i="5.81,161,1610380800"; d="scan'208";a="104328075" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 08 Feb 2021 18:55:47 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id 9A5AC4CE6F85; Mon, 8 Feb 2021 18:55:43 +0800 (CST) Received: from G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.200) by G08CNEXMBPEKD04.g08.fujitsu.local (10.167.33.201) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 8 Feb 2021 18:55:45 +0800 Received: from irides.mr.mr.mr (10.167.225.141) by G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 8 Feb 2021 18:55:45 +0800 From: Shiyang Ruan To: , , , , , Subject: [PATCH v3 09/11] md: Implement ->corrupted_range() Date: Mon, 8 Feb 2021 18:55:28 +0800 Message-ID: <20210208105530.3072869-10-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210208105530.3072869-1-ruansy.fnst@cn.fujitsu.com> References: <20210208105530.3072869-1-ruansy.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 9A5AC4CE6F85.ADF44 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Message-ID-Hash: Q2GSGZLD7N5XGACDPEN3PHIFWGGWFJVE X-Message-ID-Hash: Q2GSGZLD7N5XGACDPEN3PHIFWGGWFJVE X-MailFrom: ruansy.fnst@cn.fujitsu.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: darrick.wong@oracle.com, david@fromorbit.com, hch@lst.de, agk@redhat.com, snitzer@redhat.com, rgoldwyn@suse.de, qi.fuli@fujitsu.com, y-goto@fujitsu.com X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: With the support of ->rmap(), it is possible to obtain the superblock on a mapped device. Signed-off-by: Shiyang Ruan --- drivers/md/dm.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 7bac564f3faa..31b0c340b695 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -507,6 +507,66 @@ static int dm_blk_report_zones(struct gendisk *disk, sector_t sector, #define dm_blk_report_zones NULL #endif /* CONFIG_BLK_DEV_ZONED */ +struct corrupted_hit_info { + struct block_device *bdev; + sector_t offset; +}; + +static int dm_blk_corrupted_hit(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t count, void *data) +{ + struct corrupted_hit_info *bc = data; + + return bc->bdev == (void *)dev->bdev && + (start <= bc->offset && bc->offset < start + count); +} + +struct corrupted_do_info { + size_t length; + void *data; +}; + +static int dm_blk_corrupted_do(struct dm_target *ti, struct block_device *bdev, + sector_t disk_sect, void *data) +{ + struct corrupted_do_info *bc = data; + loff_t disk_off = to_bytes(disk_sect); + loff_t bdev_off = to_bytes(disk_sect - get_start_sect(bdev)); + + return bd_corrupted_range(bdev, disk_off, bdev_off, bc->length, bc->data); +} + +static int dm_blk_corrupted_range(struct gendisk *disk, + struct block_device *target_bdev, + loff_t target_offset, size_t len, void *data) +{ + struct mapped_device *md = disk->private_data; + struct dm_table *map; + struct dm_target *ti; + sector_t target_sect = to_sector(target_offset); + struct corrupted_hit_info hi = {target_bdev, target_sect}; + struct corrupted_do_info di = {len, data}; + int srcu_idx, i, rc = -ENODEV; + + map = dm_get_live_table(md, &srcu_idx); + if (!map) + return rc; + + for (i = 0; i < dm_table_get_num_targets(map); i++) { + ti = dm_table_get_target(map, i); + if (!(ti->type->iterate_devices && ti->type->rmap)) + continue; + if (!ti->type->iterate_devices(ti, dm_blk_corrupted_hit, &hi)) + continue; + + rc = ti->type->rmap(ti, target_sect, dm_blk_corrupted_do, &di); + break; + } + + dm_put_live_table(md, srcu_idx); + return rc; +} + static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx, struct block_device **bdev) { @@ -3062,6 +3122,7 @@ static const struct block_device_operations dm_blk_dops = { .getgeo = dm_blk_getgeo, .report_zones = dm_blk_report_zones, .pr_ops = &dm_pr_ops, + .corrupted_range = dm_blk_corrupted_range, .owner = THIS_MODULE };