From patchwork Wed Dec 5 12:28:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Goldwyn Rodrigues X-Patchwork-Id: 10713977 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 3AA6914E2 for ; Wed, 5 Dec 2018 12:28:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A58D2C78C for ; Wed, 5 Dec 2018 12:28:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1E8362CB4D; Wed, 5 Dec 2018 12:28:56 +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 B854A2C78C for ; Wed, 5 Dec 2018 12:28:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727620AbeLEM2y (ORCPT ); Wed, 5 Dec 2018 07:28:54 -0500 Received: from mx2.suse.de ([195.135.220.15]:48444 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727525AbeLEM2y (ORCPT ); Wed, 5 Dec 2018 07:28:54 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id CA666ADA9 for ; Wed, 5 Dec 2018 12:28:52 +0000 (UTC) From: Goldwyn Rodrigues To: linux-btrfs@vger.kernel.org Cc: Goldwyn Rodrigues Subject: [PATCH 01/10] btrfs: create a mount option for dax Date: Wed, 5 Dec 2018 06:28:26 -0600 Message-Id: <20181205122835.19290-2-rgoldwyn@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20181205122835.19290-1-rgoldwyn@suse.de> References: <20181205122835.19290-1-rgoldwyn@suse.de> 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 From: Goldwyn Rodrigues Also, set the inode->i_flags to S_DAX Signed-off-by: Goldwyn Rodrigues Reviewed-by: Nikolay Borisov --- fs/btrfs/ctree.h | 1 + fs/btrfs/ioctl.c | 5 ++++- fs/btrfs/super.c | 15 +++++++++++++++ 3 files changed, 20 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 68f322f600a0..5cc470fa6a40 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1353,6 +1353,7 @@ static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) #define BTRFS_MOUNT_REF_VERIFY (1 << 28) +#define BTRFS_MOUNT_DAX (1 << 29) #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) #define BTRFS_DEFAULT_MAX_INLINE (2048) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 802a628e9f7d..e9146c157816 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -149,8 +149,11 @@ void btrfs_sync_inode_flags_to_i_flags(struct inode *inode) if (binode->flags & BTRFS_INODE_DIRSYNC) new_fl |= S_DIRSYNC; + if ((btrfs_test_opt(btrfs_sb(inode->i_sb), DAX)) && S_ISREG(inode->i_mode)) + new_fl |= S_DAX; + set_mask_bits(&inode->i_flags, - S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC, + S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC | S_DAX, new_fl); } diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 645fc81e2a94..035263b61cf5 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -326,6 +326,7 @@ enum { Opt_treelog, Opt_notreelog, Opt_usebackuproot, Opt_user_subvol_rm_allowed, + Opt_dax, /* Deprecated options */ Opt_alloc_start, @@ -393,6 +394,7 @@ static const match_table_t tokens = { {Opt_notreelog, "notreelog"}, {Opt_usebackuproot, "usebackuproot"}, {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"}, + {Opt_dax, "dax"}, /* Deprecated options */ {Opt_alloc_start, "alloc_start=%s"}, @@ -739,6 +741,17 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, case Opt_user_subvol_rm_allowed: btrfs_set_opt(info->mount_opt, USER_SUBVOL_RM_ALLOWED); break; +#ifdef CONFIG_FS_DAX + case Opt_dax: + if (btrfs_super_num_devices(info->super_copy) > 1) { + btrfs_info(info, + "dax not supported for multi-device btrfs partition\n"); + ret = -EOPNOTSUPP; + goto out; + } + btrfs_set_opt(info->mount_opt, DAX); + break; +#endif case Opt_enospc_debug: btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG); break; @@ -1329,6 +1342,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",clear_cache"); if (btrfs_test_opt(info, USER_SUBVOL_RM_ALLOWED)) seq_puts(seq, ",user_subvol_rm_allowed"); + if (btrfs_test_opt(info, DAX)) + seq_puts(seq, ",dax"); if (btrfs_test_opt(info, ENOSPC_DEBUG)) seq_puts(seq, ",enospc_debug"); if (btrfs_test_opt(info, AUTO_DEFRAG))