From patchwork Tue Oct 31 14:22:26 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10034669 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DE4A960291 for ; Tue, 31 Oct 2017 14:23:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D050E28AE5 for ; Tue, 31 Oct 2017 14:23:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C4B2D28B24; Tue, 31 Oct 2017 14:23:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B302D28AE5 for ; Tue, 31 Oct 2017 14:23:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932128AbdJaOXR (ORCPT ); Tue, 31 Oct 2017 10:23:17 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:45943 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932115AbdJaOXQ (ORCPT ); Tue, 31 Oct 2017 10:23:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:To:From:Sender:Reply-To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding: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=VSzHduS3hg/Pl5q/5kztVAv/Cjji5YnHVgLIrLoGx7k=; b=W7PUxjf7iBEdgRYHtqyhqYceE aIhtm3SStkVoLl4VqafqOWS5UQcvnrTJj5mFjVSJrggGotMkcQBd++3M9bpA5K8aEk8XfYufXzbMl 4kVJf36Y4mKZ/Ew/hOGyI4WaRqMkVbO0cjret/tBnyt3ACZcz0ZQ7pcC0UZve1fpCKL0+RMUpihsl m5QamcBFcC5XDWwLAHwRE5iyw7wVUJKBeMuASORumgHC0BjvcQ8SKDg7/leOjtU8rlvy+FdfPwxXH 92FPtChpntfdckOGIBkwBpnmxkgVmiDfZ/uWoTrDnkjHdgpCVmEs9G1S5JNO5wv3SKb+kUP0/F7rh Dfgq8bRRg==; Received: from bzq-164-168-31-210.red.bezeqint.net ([31.168.164.210] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat Linux)) id 1e9XRj-0007fl-RJ for linux-xfs@vger.kernel.org; Tue, 31 Oct 2017 14:23:16 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Subject: [PATCH 14/18] xfs: simplify xfs_reflink_convert_cow Date: Tue, 31 Oct 2017 16:22:26 +0200 Message-Id: <20171031142230.11755-15-hch@lst.de> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171031142230.11755-1-hch@lst.de> References: <20171031142230.11755-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Instead of looking up extents to convert and calling xfs_bmapi_write on each of them just let xfs_bmapi_write handle the full range. To make this robust add a new XFS_BMAPI_CONVERT_ONLY that only converts ranges and never allocates blocks. Signed-off-by: Christoph Hellwig --- fs/xfs/libxfs/xfs_bmap.c | 3 ++- fs/xfs/libxfs/xfs_bmap.h | 3 +++ fs/xfs/xfs_reflink.c | 29 +++++++++++------------------ 3 files changed, 16 insertions(+), 19 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 453dc1ae76ab..e020bd3f8717 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -4330,7 +4330,8 @@ xfs_bmapi_write( * First, deal with the hole before the allocated space * that we found, if any. */ - if (need_alloc || wasdelay) { + if ((need_alloc || wasdelay) && + !(flags & XFS_BMAPI_CONVERT_ONLY)) { bma.eof = eof; bma.conv = !!(flags & XFS_BMAPI_CONVERT); bma.wasdel = wasdelay; diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h index 195f335f4615..fba60ed7aea5 100644 --- a/fs/xfs/libxfs/xfs_bmap.h +++ b/fs/xfs/libxfs/xfs_bmap.h @@ -113,6 +113,9 @@ struct xfs_extent_free_item /* Only convert delalloc space, don't allocate entirely new extents */ #define XFS_BMAPI_DELALLOC 0x400 +/* Only convert unwritten extents, don't allocate new hotels */ +#define XFS_BMAPI_CONVERT_ONLY 0x800 + #define XFS_BMAPI_FLAGS \ { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ { XFS_BMAPI_METADATA, "METADATA" }, \ diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 43bec0def51d..99c5d4dbc5d3 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -353,29 +353,22 @@ xfs_reflink_convert_cow( xfs_off_t offset, xfs_off_t count) { - struct xfs_bmbt_irec got; - struct xfs_defer_ops dfops; struct xfs_mount *mp = ip->i_mount; - struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); xfs_fileoff_t offset_fsb = XFS_B_TO_FSBT(mp, offset); xfs_fileoff_t end_fsb = XFS_B_TO_FSB(mp, offset + count); - struct xfs_iext_cursor ext; - bool found; - int error = 0; - - xfs_ilock(ip, XFS_ILOCK_EXCL); + xfs_filblks_t count_fsb = end_fsb - offset_fsb; + struct xfs_bmbt_irec imap; + struct xfs_defer_ops dfops; + xfs_fsblock_t first_block = NULLFSBLOCK; + int nimaps = 1, error = 0; - /* Convert all the extents to real from unwritten. */ - for (found = xfs_iext_lookup_extent(ip, ifp, offset_fsb, &ext, &got); - found && got.br_startoff < end_fsb; - found = xfs_iext_next_extent(ifp, &ext, &got)) { - error = xfs_reflink_convert_cow_extent(ip, &got, offset_fsb, - end_fsb - offset_fsb, &dfops); - if (error) - break; - } + ASSERT(count != 0); - /* Finish up. */ + xfs_ilock(ip, XFS_ILOCK_EXCL); + error = xfs_bmapi_write(NULL, ip, offset_fsb, count_fsb, + XFS_BMAPI_COWFORK | XFS_BMAPI_CONVERT | + XFS_BMAPI_CONVERT_ONLY, &first_block, 0, &imap, &nimaps, + &dfops); xfs_iunlock(ip, XFS_ILOCK_EXCL); return error; }