From patchwork Mon Apr 29 17:26:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Goldwyn Rodrigues X-Patchwork-Id: 10922189 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C2C8A14B6 for ; Mon, 29 Apr 2019 17:27:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A8A7728877 for ; Mon, 29 Apr 2019 17:27:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9C829288DA; Mon, 29 Apr 2019 17:27:12 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI 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 749BC28877 for ; Mon, 29 Apr 2019 17:27:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728841AbfD2R1K (ORCPT ); Mon, 29 Apr 2019 13:27:10 -0400 Received: from mx2.suse.de ([195.135.220.15]:57996 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728748AbfD2R1K (ORCPT ); Mon, 29 Apr 2019 13:27:10 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 7DA90AD0A; Mon, 29 Apr 2019 17:27:08 +0000 (UTC) From: Goldwyn Rodrigues To: linux-btrfs@vger.kernel.org Cc: kilobyte@angband.pl, linux-fsdevel@vger.kernel.org, jack@suse.cz, david@fromorbit.com, willy@infradead.org, hch@lst.de, darrick.wong@oracle.com, dsterba@suse.cz, nborisov@suse.com, linux-nvdimm@lists.01.org Subject: [PATCH v4 00/18] btrfs dax support Date: Mon, 29 Apr 2019 12:26:31 -0500 Message-Id: <20190429172649.8288-1-rgoldwyn@suse.de> X-Mailer: git-send-email 2.16.4 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch set adds support for dax on the BTRFS filesystem. In order to support for CoW for btrfs, there were changes which had to be made to the dax handling. The important one is copying blocks into the same dax device before using them which is performed by iomap type IOMAP_DAX_COW. Snapshotting and CoW features are supported (including mmap preservation across snapshots). Git: https://github.com/goldwynr/linux/tree/btrfs-dax Changes since v3: - Fixed memcpy bug - used flags for dax_insert_entry instead of bools for dax_insert_entry() Changes since v2: - Created a new type IOMAP_DAX_COW as opposed to flag IOMAP_F_COW - CoW source address is presented in iomap.inline_data - Split the patches to more elaborate dax/iomap patches Changes since v1: - use iomap instead of redoing everything in btrfs - support for mmap writeprotecting on snapshotting fs/btrfs/Makefile | 1 fs/btrfs/ctree.h | 38 +++++ fs/btrfs/dax.c | 289 +++++++++++++++++++++++++++++++++++++++++-- fs/btrfs/disk-io.c | 4 fs/btrfs/file.c | 37 ++++- fs/btrfs/inode.c | 114 ++++++++++++---- fs/btrfs/ioctl.c | 29 +++- fs/btrfs/send.c | 4 fs/btrfs/super.c | 30 ++++ fs/dax.c | 183 ++++++++++++++++++++++++--- fs/iomap.c | 9 - fs/ocfs2/file.c | 2 fs/read_write.c | 11 - fs/xfs/xfs_reflink.c | 2 include/linux/dax.h | 15 +- include/linux/fs.h | 8 + include/linux/iomap.h | 7 + include/trace/events/btrfs.h | 56 ++++++++ 18 files changed, 752 insertions(+), 87 deletions(-)