From: ira.weiny@intel.com
To: linux-kernel@vger.kernel.org
Cc: Ira Weiny <ira.weiny@intel.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
"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>,
linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH V5 10/12] fs/xfs: Allow toggle of effective DAX flag
Date: Wed, 26 Feb 2020 21:24:40 -0800 [thread overview]
Message-ID: <20200227052442.22524-11-ira.weiny@intel.com> (raw)
In-Reply-To: <20200227052442.22524-1-ira.weiny@intel.com>
From: Ira Weiny <ira.weiny@intel.com>
Now that locking of the inode aops is in place we can allow a DAX state
change.
Use the new xfs_inode_enable_dax() to set IS_DAX() as needed and update
the aops vector after the enabled state change.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from v4:
Adjust for open coding of the aops lock
Changes from V3:
Remove static branch stuff.
Fix bugs found by Jeff by using xfs_inode_enable_dax()
Condition xfs_ioctl_setattr_dax_invalidate() on CONFIG_FS_DAX
Changes from V2:
Add in lock_dax_state_static_key static branch enabling.
Rebase updates
---
fs/xfs/xfs_inode.h | 2 ++
fs/xfs/xfs_ioctl.c | 20 +++++++++++++++++---
fs/xfs/xfs_iops.c | 17 ++++++++++++-----
3 files changed, 31 insertions(+), 8 deletions(-)
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 492e53992fa9..7d4968915dec 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -466,6 +466,8 @@ int xfs_break_layouts(struct inode *inode, uint *iolock,
/* from xfs_iops.c */
extern void xfs_setup_inode(struct xfs_inode *ip);
extern void xfs_setup_iops(struct xfs_inode *ip);
+extern void xfs_setup_a_ops(struct xfs_inode *ip);
+extern bool xfs_inode_enable_dax(struct xfs_inode *ip);
/*
* When setting up a newly allocated inode, we need to call
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 40ae791cfb41..38e91de44a6f 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1123,12 +1123,11 @@ xfs_diflags_to_linux(
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
-#if 0 /* disabled until the flag switching races are sorted out */
- if (xflags & FS_XFLAG_DAX)
+
+ if (xfs_inode_enable_dax(ip))
inode->i_flags |= S_DAX;
else
inode->i_flags &= ~S_DAX;
-#endif
}
static int
@@ -1183,6 +1182,7 @@ xfs_ioctl_setattr_xflags(
* so that the cache invalidation is atomic with respect to the DAX flag
* manipulation.
*/
+#if defined(CONFIG_FS_DAX)
static int
xfs_ioctl_setattr_dax_invalidate(
struct xfs_inode *ip,
@@ -1233,6 +1233,16 @@ xfs_ioctl_setattr_dax_invalidate(
return error;
}
+#else /* !CONFIG_FS_DAX */
+static int
+xfs_ioctl_setattr_dax_invalidate(
+ struct xfs_inode *ip,
+ struct fsxattr *fa,
+ int *join_flags)
+{
+ return 0;
+}
+#endif
/*
* Set up the transaction structure for the setattr operation, checking that we
@@ -1524,6 +1534,8 @@ xfs_ioctl_setattr(
else
ip->i_d.di_cowextsize = 0;
+ xfs_setup_a_ops(ip);
+
code = xfs_trans_commit(tp);
/*
@@ -1639,6 +1651,8 @@ xfs_ioc_setxflags(
goto out_drop_write;
}
+ xfs_setup_a_ops(ip);
+
error = xfs_trans_commit(tp);
out_drop_write:
mnt_drop_write_file(filp);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index ff711efc5247..8f023be39705 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1259,7 +1259,7 @@ xfs_inode_supports_dax(
return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
}
-STATIC bool
+bool
xfs_inode_enable_dax(
struct xfs_inode *ip)
{
@@ -1355,6 +1355,16 @@ xfs_setup_inode(
}
}
+void xfs_setup_a_ops(struct xfs_inode *ip)
+{
+ struct inode *inode = &ip->i_vnode;
+
+ if (IS_DAX(inode))
+ inode->i_mapping->a_ops = &xfs_dax_aops;
+ else
+ inode->i_mapping->a_ops = &xfs_address_space_operations;
+}
+
void
xfs_setup_iops(
struct xfs_inode *ip)
@@ -1365,10 +1375,7 @@ xfs_setup_iops(
case S_IFREG:
inode->i_op = &xfs_inode_operations;
inode->i_fop = &xfs_file_operations;
- if (IS_DAX(inode))
- inode->i_mapping->a_ops = &xfs_dax_aops;
- else
- inode->i_mapping->a_ops = &xfs_address_space_operations;
+ xfs_setup_a_ops(ip);
break;
case S_IFDIR:
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
--
2.21.0
next prev parent reply other threads:[~2020-02-27 5:33 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-27 5:24 [PATCH V5 00/12] Enable per-file/per-directory DAX operations V5 ira.weiny
2020-02-27 5:24 ` [PATCH V5 01/12] fs/xfs: Remove unnecessary initialization of i_rwsem ira.weiny
2020-02-27 17:25 ` Ira Weiny
2020-02-27 5:24 ` [PATCH V5 02/12] fs: Remove unneeded IS_DAX() check ira.weiny
2020-02-27 5:24 ` [PATCH V5 03/12] fs/stat: Define DAX statx attribute ira.weiny
2020-02-27 5:24 ` [PATCH V5 04/12] fs/xfs: Isolate the physical DAX flag from enabled ira.weiny
2020-02-27 5:24 ` [PATCH V5 05/12] fs/xfs: Create function xfs_inode_enable_dax() ira.weiny
2020-03-01 22:37 ` Dave Chinner
2020-02-27 5:24 ` [PATCH V5 06/12] fs: Add locking for a dynamic address space operations state ira.weiny
2020-03-02 1:26 ` Dave Chinner
2020-03-02 1:36 ` Dave Chinner
2020-02-27 5:24 ` [PATCH V5 07/12] fs: Prevent DAX state change if file is mmap'ed ira.weiny
2020-02-27 5:24 ` [PATCH V5 08/12] fs/xfs: Hold off aops users while changing DAX state ira.weiny
2020-02-27 5:24 ` [PATCH V5 09/12] fs/xfs: Clean up locking in dax invalidate ira.weiny
2020-02-27 5:24 ` ira.weiny [this message]
2020-02-27 5:24 ` [PATCH V5 11/12] fs/xfs: Remove xfs_diflags_to_linux() ira.weiny
2020-02-27 5:24 ` [PATCH V5 12/12] Documentation/dax: Update Usage section ira.weiny
2020-03-05 15:51 ` [PATCH V5 00/12] Enable per-file/per-directory DAX operations V5 Christoph Hellwig
2020-03-09 17:04 ` Ira Weiny
2020-03-11 3:36 ` Darrick J. Wong
2020-03-11 6:29 ` Christoph Hellwig
2020-03-11 17:07 ` Dan Williams
2020-03-16 9:52 ` Jan Kara
2020-03-16 9:55 ` Christoph Hellwig
2020-04-01 4:00 ` Darrick J. Wong
2020-04-01 10:25 ` Jan Kara
2020-04-02 8:53 ` Christoph Hellwig
2020-04-02 20:55 ` Ira Weiny
2020-04-03 7:27 ` Christoph Hellwig
2020-04-03 15:48 ` Ira Weiny
2020-04-03 17:03 ` Jan Kara
2020-04-03 18:18 ` Ira Weiny
2020-04-03 18:21 ` Ira Weiny
2020-04-03 18:37 ` Darrick J. Wong
2020-04-05 6:19 ` Ira Weiny
2020-04-06 10:00 ` Jan Kara
2020-04-03 18:29 ` Darrick J. Wong
2020-04-03 16:05 ` Darrick J. Wong
2020-04-03 4:39 ` Ira Weiny
2020-03-11 6:39 ` Dave Chinner
2020-03-11 6:44 ` Christoph Hellwig
2020-03-11 17:07 ` Dan Williams
2020-03-12 0:49 ` Dave Chinner
2020-03-12 3:00 ` Darrick J. Wong
2020-03-12 7:27 ` Christoph Hellwig
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