From patchwork Fri Feb 26 00:20:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12105301 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,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 4A335C433E0 for ; Fri, 26 Feb 2021 00:26:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 19F1764F1F for ; Fri, 26 Feb 2021 00:26:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229752AbhBZA0h (ORCPT ); Thu, 25 Feb 2021 19:26:37 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:12518 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232237AbhBZA0a (ORCPT ); Thu, 25 Feb 2021 19:26:30 -0500 X-IronPort-AV: E=Sophos;i="5.81,207,1610380800"; d="scan'208";a="104882836" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 26 Feb 2021 08:21:18 +0800 Received: from G08CNEXMBPEKD05.g08.fujitsu.local (unknown [10.167.33.204]) by cn.fujitsu.com (Postfix) with ESMTP id 533554CE76ED; Fri, 26 Feb 2021 08:21:17 +0800 (CST) Received: from G08CNEXCHPEKD04.g08.fujitsu.local (10.167.33.200) by G08CNEXMBPEKD05.g08.fujitsu.local (10.167.33.204) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Feb 2021 08:21:08 +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; Fri, 26 Feb 2021 08:21:07 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , , Subject: [PATCH v2 06/10] fsdax: Add dax_iomap_cow_copy() for dax_iomap_zero Date: Fri, 26 Feb 2021 08:20:26 +0800 Message-ID: <20210226002030.653855-7-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> References: <20210226002030.653855-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 533554CE76ED.A3477 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Punch hole on a reflinked file needs dax_copy_edge() too. Otherwise, data in not aligned area will be not correct. So, add the srcmap to dax_iomap_zero() and replace memset() as dax_copy_edge(). Signed-off-by: Shiyang Ruan Reviewed-by: Christoph Hellwig --- fs/dax.c | 6 ++++-- fs/iomap/buffered-io.c | 2 +- include/linux/dax.h | 3 ++- 3 files changed, 7 insertions(+), 4 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index ec4b733e0b59..4f6c6ba68e6f 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1116,7 +1116,8 @@ static vm_fault_t dax_load_hole(struct xa_state *xas, return ret; } -s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap) +s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap, + struct iomap *srcmap) { sector_t sector = iomap_sector(iomap, pos & PAGE_MASK); pgoff_t pgoff; @@ -1146,7 +1147,8 @@ s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap) } if (!page_aligned) { - memset(kaddr + offset, 0, size); + dax_iomap_cow_copy(offset, size, PAGE_SIZE, srcmap, + kaddr, true); dax_flush(iomap->dax_dev, kaddr + offset, size); } dax_read_unlock(id); diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 16a1e82e3aeb..d754b1f1a05d 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -933,7 +933,7 @@ static loff_t iomap_zero_range_actor(struct inode *inode, loff_t pos, s64 bytes; if (IS_DAX(inode)) - bytes = dax_iomap_zero(pos, length, iomap); + bytes = dax_iomap_zero(pos, length, iomap, srcmap); else bytes = iomap_zero(inode, pos, length, iomap, srcmap); if (bytes < 0) diff --git a/include/linux/dax.h b/include/linux/dax.h index b52f084aa643..3275e01ed33d 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -237,7 +237,8 @@ vm_fault_t dax_finish_sync_fault(struct vm_fault *vmf, int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index); int dax_invalidate_mapping_entry_sync(struct address_space *mapping, pgoff_t index); -s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap); +s64 dax_iomap_zero(loff_t pos, u64 length, struct iomap *iomap, + struct iomap *srcmap); static inline bool dax_mapping(struct address_space *mapping) { return mapping->host && IS_DAX(mapping->host);