From patchwork Wed Apr 15 06:45:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 11489935 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 43DD86CA for ; Wed, 15 Apr 2020 06:48:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35654206D9 for ; Wed, 15 Apr 2020 06:48:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2635064AbgDOGsH (ORCPT ); Wed, 15 Apr 2020 02:48:07 -0400 Received: from mga01.intel.com ([192.55.52.88]:14277 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393637AbgDOGpi (ORCPT ); Wed, 15 Apr 2020 02:45:38 -0400 IronPort-SDR: aBJ7x5zs02ro+yl1j3znZQeKnut/vQhVct8DXRigzisscmpUaAZB67gySislqdaA3deRPg8iJR /oQ51duRNKYw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2020 23:45:37 -0700 IronPort-SDR: /mQA8trEp4JWRxm37OaMEiPgNUAOEX1tin4upa7GLcH6w5rRnSU614Qw8fGzqOuWiufLwh0k76 3N6Ctu7vvXmw== X-IronPort-AV: E=Sophos;i="5.72,386,1580803200"; d="scan'208";a="244025774" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2020 23:45:36 -0700 From: ira.weiny@intel.com To: linux-kernel@vger.kernel.org, "Darrick J. Wong" Cc: Ira Weiny , Jan Kara , Dan Williams , Dave Chinner , Christoph Hellwig , "Theodore Y. Ts'o" , Jeff Moyer , linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH V8 05/11] fs/xfs: Make DAX mount option a tri-state Date: Tue, 14 Apr 2020 23:45:17 -0700 Message-Id: <20200415064523.2244712-6-ira.weiny@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200415064523.2244712-1-ira.weiny@intel.com> References: <20200415064523.2244712-1-ira.weiny@intel.com> MIME-Version: 1.0 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Ira Weiny As agreed upon[1]. We make the dax mount option a tri-state. '-o dax' continues to operate the same. We add 'always', 'never', and 'inode' (default). [1] https://lore.kernel.org/lkml/20200405061945.GA94792@iweiny-DESK2.sc.intel.com/ Signed-off-by: Ira Weiny --- Changes from v7: Change to XFS_MOUNT_DAX_NEVER Changes from v6: Use 2 flag bits rather than a field. change iflag to inode Changes from v5: New Patch --- fs/xfs/xfs_mount.h | 3 ++- fs/xfs/xfs_super.c | 44 ++++++++++++++++++++++++++++++++++++++++---- 2 files changed, 42 insertions(+), 5 deletions(-) diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 54bd74088936..2e88c30642e3 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -233,7 +233,8 @@ typedef struct xfs_mount { allocator */ #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ -#define XFS_MOUNT_DAX_ALWAYS (1ULL << 62) /* TEST ONLY! */ +#define XFS_MOUNT_DAX_ALWAYS (1ULL << 62) +#define XFS_MOUNT_DAX_NEVER (1ULL << 63) /* * Max and min values for mount-option defined I/O diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 3863f41757d2..142e5d03566f 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -47,6 +47,32 @@ static struct kset *xfs_kset; /* top-level xfs sysfs dir */ static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ #endif +enum { + XFS_DAX_INODE = 0, + XFS_DAX_ALWAYS = 1, + XFS_DAX_NEVER = 2, +}; + +static void xfs_mount_set_dax_mode(struct xfs_mount *mp, u32 val) +{ + if (val == XFS_DAX_INODE) { + mp->m_flags &= ~(XFS_MOUNT_DAX_ALWAYS | XFS_MOUNT_DAX_NEVER); + } else if (val == XFS_DAX_ALWAYS) { + mp->m_flags |= XFS_MOUNT_DAX_ALWAYS; + mp->m_flags &= ~XFS_MOUNT_DAX_NEVER; + } else if (val == XFS_DAX_NEVER) { + mp->m_flags |= XFS_MOUNT_DAX_NEVER; + mp->m_flags &= ~XFS_MOUNT_DAX_ALWAYS; + } +} + +static const struct constant_table dax_param_enums[] = { + {"inode", XFS_DAX_INODE }, + {"always", XFS_DAX_ALWAYS }, + {"never", XFS_DAX_NEVER }, + {} +}; + /* * Table driven mount option parser. */ @@ -59,7 +85,7 @@ enum { Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota, Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, - Opt_discard, Opt_nodiscard, Opt_dax, + Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, }; static const struct fs_parameter_spec xfs_fs_parameters[] = { @@ -103,6 +129,7 @@ static const struct fs_parameter_spec xfs_fs_parameters[] = { fsparam_flag("discard", Opt_discard), fsparam_flag("nodiscard", Opt_nodiscard), fsparam_flag("dax", Opt_dax), + fsparam_enum("dax", Opt_dax_enum, dax_param_enums), {} }; @@ -129,7 +156,6 @@ xfs_fs_show_options( { XFS_MOUNT_GRPID, ",grpid" }, { XFS_MOUNT_DISCARD, ",discard" }, { XFS_MOUNT_LARGEIO, ",largeio" }, - { XFS_MOUNT_DAX_ALWAYS, ",dax" }, { 0, NULL } }; struct xfs_mount *mp = XFS_M(root->d_sb); @@ -185,6 +211,13 @@ xfs_fs_show_options( if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) seq_puts(m, ",noquota"); + if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) + seq_puts(m, ",dax=always"); + else if (mp->m_flags & XFS_MOUNT_DAX_NEVER) + seq_puts(m, ",dax=never"); + else + seq_puts(m, ",dax=inode"); + return 0; } @@ -1244,7 +1277,10 @@ xfs_fc_parse_param( return 0; #ifdef CONFIG_FS_DAX case Opt_dax: - mp->m_flags |= XFS_MOUNT_DAX_ALWAYS; + xfs_mount_set_dax_mode(mp, XFS_DAX_ALWAYS); + return 0; + case Opt_dax_enum: + xfs_mount_set_dax_mode(mp, result.uint_32); return 0; #endif default: @@ -1451,7 +1487,7 @@ xfs_fc_fill_super( if (!rtdev_is_dax && !datadev_is_dax) { xfs_alert(mp, "DAX unsupported by block device. Turning off DAX."); - mp->m_flags &= ~XFS_MOUNT_DAX_ALWAYS; + xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER); } if (xfs_sb_version_hasreflink(&mp->m_sb)) { xfs_alert(mp,