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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 26742ECE588 for ; Tue, 15 Oct 2019 15:44:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3347205F4 for ; Tue, 15 Oct 2019 15:44:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="bmG8Jlij" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387668AbfJOPoT (ORCPT ); Tue, 15 Oct 2019 11:44:19 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:48094 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387623AbfJOPoQ (ORCPT ); Tue, 15 Oct 2019 11:44:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=QuyT4qjP/N5LExRTgGT+wH3VMTfJMNLEgqsgddzXeSA=; b=bmG8Jlij7ZAtkwQ/XZmiWS7PjN FL9rEFngG6SQy6IFwCylqNZlOwfMt8f/TrluhqoPLWFq/uINHCy/eCJBFlkI8a7/HeC2E0scYaJxw UrqYfkGbi1T6sEt93NoGQ9k0mMxjAJ/Vh4kP6d+Be9/CJhacYtDO2UwmXSlnZG/I+vLBwDX5lyprG IxJhzBKMIxiVTC+ksyTeulnt4hQCXthuEk7VNeejSWhzMrLCNKnsP7lKVikWruxFAuwj9/Jrk8WrJ 44GMyji4s2JQIP+vGBB/AyAnbzUO0L5DNMfbW2PpYZQipsWkTZJd5mySoAWy6LGx9iqtVX0VyOJs+ SHpyOTtQ==; Received: from [2001:4bb8:18c:d7b:c70:4a89:bc61:3] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iKOzb-0007x2-Az; Tue, 15 Oct 2019 15:44:11 +0000 From: Christoph Hellwig To: "Darrick J . Wong" Cc: Damien Le Moal , Andreas Gruenbacher , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 07/12] iomap: zero newly allocated mapped blocks Date: Tue, 15 Oct 2019 17:43:40 +0200 Message-Id: <20191015154345.13052-8-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191015154345.13052-1-hch@lst.de> References: <20191015154345.13052-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org File systems like gfs2 don't support delayed allocations or unwritten extents and thus allocate normal mapped blocks to fill holes. To cover the case of such file systems allocating new blocks to fill holes also zero out mapped blocks with the new flag. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index e25901ae3ff4..181ee8477aad 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -203,6 +203,14 @@ iomap_read_inline_data(struct inode *inode, struct page *page, SetPageUptodate(page); } +static inline bool iomap_block_needs_zeroing(struct inode *inode, + struct iomap *iomap, loff_t pos) +{ + return iomap->type != IOMAP_MAPPED || + (iomap->flags & IOMAP_F_NEW) || + pos >= i_size_read(inode); +} + static loff_t iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data, struct iomap *iomap) @@ -226,7 +234,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data, if (plen == 0) goto done; - if (iomap->type != IOMAP_MAPPED || pos >= i_size_read(inode)) { + if (iomap_block_needs_zeroing(inode, iomap, pos)) { zero_user(page, poff, plen); iomap_set_range_uptodate(page, poff, plen); goto done; @@ -532,7 +540,7 @@ iomap_read_page_sync(struct inode *inode, loff_t block_start, struct page *page, struct bio_vec bvec; struct bio bio; - if (iomap->type != IOMAP_MAPPED || block_start >= i_size_read(inode)) { + if (iomap_block_needs_zeroing(inode, iomap, block_start)) { zero_user_segments(page, poff, from, to, poff + plen); iomap_set_range_uptodate(page, poff, plen); return 0; -- 2.20.1