From: ira.weiny@intel.com
To: linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org,
"Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Ira Weiny <ira.weiny@intel.com>,
Al Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
Dan Williams <dan.j.williams@intel.com>,
Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@lst.de>,
"Theodore Y. Ts'o" <tytso@mit.edu>,
Jeff Moyer <jmoyer@redhat.com>,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-api@vger.kernel.org
Subject: [PATCH V11 06/11] fs/xfs: Make DAX mount option a tri-state
Date: Mon, 27 Apr 2020 17:21:37 -0700 [thread overview]
Message-ID: <20200428002142.404144-7-ira.weiny@intel.com> (raw)
In-Reply-To: <20200428002142.404144-1-ira.weiny@intel.com>
From: Ira Weiny <ira.weiny@intel.com>
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 <ira.weiny@intel.com>
---
Changes from V10:
Move show options to xfs_info_set array
Changes from V9:
Fix indentation in xfs_mount_set_dax_mode()
Do not report dax=inode
Changes from v8:
Move NEVER bit to 27
Use xfs signature style
use xfs_dax_mode enum
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 | 1 +
fs/xfs/xfs_super.c | 46 ++++++++++++++++++++++++++++++++++++++++++----
2 files changed, 43 insertions(+), 4 deletions(-)
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index f6123fb0113c..37bfb50db809 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -238,6 +238,7 @@ typedef struct xfs_mount {
allocator */
#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
#define XFS_MOUNT_DAX_ALWAYS (1ULL << 26)
+#define XFS_MOUNT_DAX_NEVER (1ULL << 27)
/*
* 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 ce169d1c7474..e80bd2c4c279 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -47,6 +47,39 @@ 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_mode {
+ XFS_DAX_INODE = 0,
+ XFS_DAX_ALWAYS = 1,
+ XFS_DAX_NEVER = 2,
+};
+
+static void
+xfs_mount_set_dax_mode(
+ struct xfs_mount *mp,
+ enum xfs_dax_mode mode)
+{
+ switch (mode) {
+ case XFS_DAX_INODE:
+ mp->m_flags &= ~(XFS_MOUNT_DAX_ALWAYS | XFS_MOUNT_DAX_NEVER);
+ break;
+ case XFS_DAX_ALWAYS:
+ mp->m_flags |= XFS_MOUNT_DAX_ALWAYS;
+ mp->m_flags &= ~XFS_MOUNT_DAX_NEVER;
+ break;
+ case XFS_DAX_NEVER:
+ mp->m_flags |= XFS_MOUNT_DAX_NEVER;
+ mp->m_flags &= ~XFS_MOUNT_DAX_ALWAYS;
+ break;
+ }
+}
+
+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 +92,7 @@ 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 +136,7 @@ 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 +163,8 @@ xfs_fs_show_options(
{ XFS_MOUNT_GRPID, ",grpid" },
{ XFS_MOUNT_DISCARD, ",discard" },
{ XFS_MOUNT_LARGEIO, ",largeio" },
- { XFS_MOUNT_DAX_ALWAYS, ",dax" },
+ { XFS_MOUNT_DAX_ALWAYS, ",dax=always" },
+ { XFS_MOUNT_DAX_NEVER, ",dax=never" },
{ 0, NULL }
};
struct xfs_mount *mp = XFS_M(root->d_sb);
@@ -1261,7 +1296,10 @@ 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:
@@ -1468,7 +1506,7 @@ 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,
--
2.25.1
next prev parent reply other threads:[~2020-04-28 0:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 0:21 [PATCH V11 00/11] XFS - Enable per-file/per-directory DAX operations V11 ira.weiny
2020-04-28 0:21 ` [PATCH V11 01/11] fs/xfs: Remove unnecessary initialization of i_rwsem ira.weiny
2020-04-28 0:21 ` [PATCH V11 02/11] fs: Remove unneeded IS_DAX() check in io_is_direct() ira.weiny
2020-04-28 0:21 ` [PATCH V11 03/11] fs/stat: Define DAX statx attribute ira.weiny
2020-04-28 0:21 ` [PATCH V11 04/11] Documentation/dax: Update Usage section ira.weiny
2020-04-28 20:27 ` Darrick J. Wong
2020-04-28 20:53 ` Ira Weiny
2020-04-28 21:12 ` Darrick J. Wong
2020-04-28 22:21 ` [PATCH V11.1] " ira.weiny
2020-04-29 2:21 ` Randy Dunlap
2020-04-29 4:30 ` Ira Weiny
2020-04-29 4:33 ` [PATCH V11.2] " ira.weiny
2020-04-29 5:47 ` Randy Dunlap
2020-04-28 0:21 ` [PATCH V11 05/11] fs/xfs: Change XFS_MOUNT_DAX to XFS_MOUNT_DAX_ALWAYS ira.weiny
2020-04-28 0:21 ` ira.weiny [this message]
2020-04-28 20:08 ` [PATCH V11 06/11] fs/xfs: Make DAX mount option a tri-state Darrick J. Wong
2020-04-28 0:21 ` [PATCH V11 07/11] fs/xfs: Create function xfs_inode_should_enable_dax() ira.weiny
2020-04-28 0:21 ` [PATCH V11 08/11] fs/xfs: Combine xfs_diflags_to_linux() and xfs_diflags_to_iflags() ira.weiny
2020-04-28 0:21 ` [PATCH V11 09/11] fs: Lift XFS_IDONTCACHE to the VFS layer ira.weiny
2020-04-28 20:06 ` Darrick J. Wong
2020-04-28 0:21 ` [PATCH V11 10/11] fs: Introduce DCACHE_DONTCACHE ira.weiny
2020-04-28 13:04 ` Jan Kara
2020-04-28 20:09 ` Darrick J. Wong
2020-04-28 0:21 ` [PATCH V11 11/11] fs/xfs: Update xfs_ioctl_setattr_dax_invalidate() ira.weiny
2020-04-28 20:11 ` Darrick J. Wong
2020-06-02 17:23 ` Darrick J. Wong
2020-06-02 23:15 ` Ira Weiny
2020-06-03 10:10 ` Jan Kara
2020-06-03 17:03 ` Darrick J. Wong
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