From: ira.weiny@intel.com
To: linux-kernel@vger.kernel.org
Cc: Ira Weiny <ira.weiny@intel.com>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Dan Williams <dan.j.williams@intel.com>,
Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@lst.de>,
"Theodore Y. Ts'o" <tytso@mit.edu>, Jan Kara <jack@suse.cz>,
Jeff Moyer <jmoyer@redhat.com>,
linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH V6 4/8] fs/xfs: Make DAX mount option a tri-state
Date: Tue, 7 Apr 2020 11:29:54 -0700 [thread overview]
Message-ID: <20200407182958.568475-5-ira.weiny@intel.com> (raw)
In-Reply-To: <20200407182958.568475-1-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 'iflag'
(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 v5:
New Patch
---
fs/xfs/xfs_iops.c | 2 +-
fs/xfs/xfs_mount.h | 26 +++++++++++++++++++++++++-
fs/xfs/xfs_super.c | 34 +++++++++++++++++++++++++++++-----
3 files changed, 55 insertions(+), 7 deletions(-)
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 81f2f93caec0..1ec4a36917bd 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1248,7 +1248,7 @@ xfs_inode_supports_dax(
return false;
/* DAX mount option or DAX iflag must be set. */
- if (!(mp->m_flags & XFS_MOUNT_DAX) &&
+ if (xfs_mount_dax_mode(mp) != XFS_DAX_ALWAYS &&
!(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
return false;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 88ab09ed29e7..ce027ee06692 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -233,7 +233,31 @@ typedef struct xfs_mount {
allocator */
#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
-#define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */
+/* DAX flag is a 2 bit field representing a tri-state for dax
+ * iflag, always, never
+ * We reserve/document the 2 bits using dax field/field2
+ */
+#define XFS_DAX_FIELD_MASK 0x3ULL
+#define XFS_DAX_FIELD_SHIFT 62
+#define XFS_MOUNT_DAX_FIELD (1ULL << 62)
+#define XFS_MOUNT_DAX_FIELD2 (1ULL << 63)
+
+enum {
+ XFS_DAX_IFLAG = 0,
+ XFS_DAX_ALWAYS = 1,
+ XFS_DAX_NEVER = 2,
+};
+
+static inline void xfs_mount_set_dax(struct xfs_mount *mp, u32 val)
+{
+ mp->m_flags &= ~(XFS_DAX_FIELD_MASK << XFS_DAX_FIELD_SHIFT);
+ mp->m_flags |= ((val & XFS_DAX_FIELD_MASK) << XFS_DAX_FIELD_SHIFT);
+}
+
+static inline u32 xfs_mount_dax_mode(struct xfs_mount *mp)
+{
+ return (mp->m_flags >> XFS_DAX_FIELD_SHIFT) & XFS_DAX_FIELD_MASK;
+}
/*
* 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 2094386af8ac..d2fd465eeed5 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -47,6 +47,13 @@ static struct kset *xfs_kset; /* top-level xfs sysfs dir */
static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
#endif
+static const struct constant_table dax_param_enums[] = {
+ {"iflag", XFS_DAX_IFLAG },
+ {"always", XFS_DAX_ALWAYS },
+ {"never", XFS_DAX_NEVER },
+ {}
+};
+
/*
* Table driven mount option parser.
*/
@@ -59,7 +66,7 @@ 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 +110,7 @@ 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 +137,6 @@ xfs_fs_show_options(
{ XFS_MOUNT_GRPID, ",grpid" },
{ XFS_MOUNT_DISCARD, ",discard" },
{ XFS_MOUNT_LARGEIO, ",largeio" },
- { XFS_MOUNT_DAX, ",dax" },
{ 0, NULL }
};
struct xfs_mount *mp = XFS_M(root->d_sb);
@@ -185,6 +192,20 @@ xfs_fs_show_options(
if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
seq_puts(m, ",noquota");
+ switch (xfs_mount_dax_mode(mp)) {
+ case XFS_DAX_IFLAG:
+ seq_puts(m, ",dax=iflag");
+ break;
+ case XFS_DAX_ALWAYS:
+ seq_puts(m, ",dax=always");
+ break;
+ case XFS_DAX_NEVER:
+ seq_puts(m, ",dax=never");
+ break;
+ default:
+ break;
+ }
+
return 0;
}
@@ -1244,7 +1265,10 @@ xfs_fc_parse_param(
return 0;
#ifdef CONFIG_FS_DAX
case Opt_dax:
- mp->m_flags |= XFS_MOUNT_DAX;
+ xfs_mount_set_dax(mp, XFS_DAX_ALWAYS);
+ return 0;
+ case Opt_dax_enum:
+ xfs_mount_set_dax(mp, result.uint_32);
return 0;
#endif
default:
@@ -1437,7 +1461,7 @@ xfs_fc_fill_super(
if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
sb->s_flags |= SB_I_VERSION;
- if (mp->m_flags & XFS_MOUNT_DAX) {
+ if (xfs_mount_dax_mode(mp) == XFS_DAX_ALWAYS) {
bool rtdev_is_dax = false, datadev_is_dax;
xfs_warn(mp,
@@ -1451,7 +1475,7 @@ 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;
+ xfs_mount_set_dax(mp, XFS_DAX_NEVER);
}
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
xfs_alert(mp,
--
2.25.1
next prev parent reply other threads:[~2020-04-07 18:30 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 18:29 [PATCH V6 0/8] Enable per-file/per-directory DAX operations V6 ira.weiny
2020-04-07 18:29 ` [PATCH V6 1/8] fs/xfs: Remove unnecessary initialization of i_rwsem ira.weiny
2020-04-07 23:46 ` Dave Chinner
2020-04-07 18:29 ` [PATCH V6 2/8] fs: Remove unneeded IS_DAX() check ira.weiny
2020-04-09 7:31 ` Christoph Hellwig
2020-04-09 14:57 ` Ira Weiny
2020-04-07 18:29 ` [PATCH V6 3/8] fs/stat: Define DAX statx attribute ira.weiny
2020-04-07 23:47 ` Dave Chinner
2020-04-07 18:29 ` ira.weiny [this message]
2020-04-07 23:59 ` [PATCH V6 4/8] fs/xfs: Make DAX mount option a tri-state Dave Chinner
2020-04-08 0:09 ` Ira Weiny
2020-04-08 0:48 ` Dave Chinner
2020-04-09 15:03 ` Ira Weiny
2020-04-07 18:29 ` [PATCH V6 5/8] fs/xfs: Create function xfs_inode_enable_dax() ira.weiny
2020-04-08 0:05 ` Dave Chinner
2020-04-08 0:13 ` Ira Weiny
2020-04-07 18:29 ` [PATCH V6 6/8] fs/xfs: Combine xfs_diflags_to_linux() and xfs_diflags_to_iflags() ira.weiny
2020-04-08 2:08 ` Dave Chinner
2020-04-08 17:09 ` Ira Weiny
2020-04-08 21:02 ` Dave Chinner
2020-04-08 21:28 ` Dan Williams
2020-04-08 22:10 ` Ira Weiny
2020-04-08 23:58 ` Dave Chinner
2020-04-09 0:22 ` Ira Weiny
2020-04-09 12:41 ` Christoph Hellwig
2020-04-09 20:49 ` Ira Weiny
2020-04-08 22:07 ` Ira Weiny
2020-04-08 23:21 ` Dave Chinner
2020-04-09 0:12 ` Ira Weiny
2020-04-09 0:30 ` Darrick J. Wong
2020-04-09 15:29 ` Ira Weiny
2020-04-09 16:59 ` Darrick J. Wong
2020-04-09 17:17 ` Jan Kara
2020-04-09 20:54 ` Ira Weiny
2020-04-09 0:49 ` Dave Chinner
2020-04-09 12:40 ` Christoph Hellwig
2020-04-10 0:27 ` Dave Chinner
2020-04-07 18:29 ` [PATCH V6 7/8] fs/xfs: Change xfs_ioctl_setattr_dax_invalidate() to xfs_ioctl_dax_check() ira.weiny
2020-04-08 2:23 ` Dave Chinner
2020-04-08 9:58 ` Jan Kara
2020-04-08 21:09 ` Dave Chinner
2020-04-08 22:26 ` Ira Weiny
2020-04-08 23:48 ` Dave Chinner
2020-04-09 12:28 ` Christoph Hellwig
2020-04-08 15:37 ` Darrick J. Wong
2020-04-08 18:13 ` Ira Weiny
2020-04-16 5:39 ` [fs/xfs] 857c9841f8: xfstests.xfs.046.fail kernel test robot
2020-04-07 18:29 ` [PATCH V6 8/8] Documentation/dax: Update Usage section ira.weiny
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200407182958.568475-5-ira.weiny@intel.com \
--to=ira.weiny@intel.com \
--cc=dan.j.williams@intel.com \
--cc=darrick.wong@oracle.com \
--cc=david@fromorbit.com \
--cc=hch@lst.de \
--cc=jack@suse.cz \
--cc=jmoyer@redhat.com \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).