diff mbox series

[V7,8/9] fs/xfs: Change xfs_ioctl_setattr_dax_invalidate()

Message ID 20200413054046.1560106-9-ira.weiny@intel.com (mailing list archive)
State New, archived
Headers show
Series Enable per-file/per-directory DAX operations V7 | expand

Commit Message

Ira Weiny April 13, 2020, 5:40 a.m. UTC
From: Ira Weiny <ira.weiny@intel.com>

We only support changing FS_XFLAG_DAX on directories.  Files get their
flag from the parent directory on creation only.  So no data
invalidation needs to happen.

Alter the xfs_ioctl_setattr_dax_invalidate() to be
xfs_ioctl_setattr_dax_validate().  xfs_ioctl_setattr_dax_validate() now
validates that any FS_XFLAG_DAX change is ok.

This also allows use to remove the join_flags logic.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>

---
Changes from v6:
	Fix completely broken implementation and update commit message.
	Use the new VFS layer I_DONTCACHE to facilitate inode eviction
	and S_DAX changing on drop_caches

Changes from v5:
	New patch
---
 fs/xfs/xfs_ioctl.c | 102 +++++++--------------------------------------
 1 file changed, 16 insertions(+), 86 deletions(-)

Comments

Darrick J. Wong April 13, 2020, 4:12 p.m. UTC | #1
On Sun, Apr 12, 2020 at 10:40:45PM -0700, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
> 
> We only support changing FS_XFLAG_DAX on directories.  Files get their
> flag from the parent directory on creation only.  So no data
> invalidation needs to happen.
> 
> Alter the xfs_ioctl_setattr_dax_invalidate() to be
> xfs_ioctl_setattr_dax_validate().  xfs_ioctl_setattr_dax_validate() now
> validates that any FS_XFLAG_DAX change is ok.
> 
> This also allows use to remove the join_flags logic.
> 
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> 
> ---
> Changes from v6:
> 	Fix completely broken implementation and update commit message.
> 	Use the new VFS layer I_DONTCACHE to facilitate inode eviction
> 	and S_DAX changing on drop_caches
> 
> Changes from v5:
> 	New patch
> ---
>  fs/xfs/xfs_ioctl.c | 102 +++++++--------------------------------------
>  1 file changed, 16 insertions(+), 86 deletions(-)
> 
> diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> index c6cd92ef4a05..ba42a5fb5b05 100644
> --- a/fs/xfs/xfs_ioctl.c
> +++ b/fs/xfs/xfs_ioctl.c
> @@ -1145,63 +1145,23 @@ xfs_ioctl_setattr_xflags(
>  }
>  
>  /*
> - * If we are changing DAX flags, we have to ensure the file is clean and any
> - * cached objects in the address space are invalidated and removed. This
> - * requires us to lock out other IO and page faults similar to a truncate
> - * operation. The locks need to be held until the transaction has been committed
> - * so that the cache invalidation is atomic with respect to the DAX flag
> - * manipulation.
> + * Mark inodes with a changing FS_XFLAG_DAX, I_DONTCACHE
>   */
> -static int
> +static void
>  xfs_ioctl_setattr_dax_invalidate(
>  	struct xfs_inode	*ip,
> -	struct fsxattr		*fa,
> -	int			*join_flags)
> +	struct fsxattr		*fa)
>  {
> -	struct inode		*inode = VFS_I(ip);
> -	struct super_block	*sb = inode->i_sb;
> -	int			error;
> -
> -	*join_flags = 0;
> -
> -	/*
> -	 * It is only valid to set the DAX flag on regular files and
> -	 * directories on filesystems where the block size is equal to the page
> -	 * size. On directories it serves as an inherited hint so we don't
> -	 * have to check the device for dax support or flush pagecache.
> -	 */
> -	if (fa->fsx_xflags & FS_XFLAG_DAX) {
> -		struct xfs_buftarg	*target = xfs_inode_buftarg(ip);
> -
> -		if (!bdev_dax_supported(target->bt_bdev, sb->s_blocksize))
> -			return -EINVAL;
> -	}
> -
> -	/* If the DAX state is not changing, we have nothing to do here. */
> -	if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
> -		return 0;
> -	if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
> -		return 0;
> +	struct inode            *inode = VFS_I(ip);
>  
>  	if (S_ISDIR(inode->i_mode))
> -		return 0;
> -
> -	/* lock, flush and invalidate mapping in preparation for flag change */
> -	xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
> -	error = filemap_write_and_wait(inode->i_mapping);
> -	if (error)
> -		goto out_unlock;
> -	error = invalidate_inode_pages2(inode->i_mapping);
> -	if (error)
> -		goto out_unlock;
> -
> -	*join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
> -	return 0;
> -
> -out_unlock:
> -	xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
> -	return error;
> +		return;

We also need a check up here to skip the I_DONTCACHE setting if the
admin has set a mount option to override the inode flag.

The rest looks good to me.

--D

> +	if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
> +	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) ||
> +	    (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
> +	     (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)))
> +		inode->i_state |= I_DONTCACHE;
>  }
>  
>  /*
> @@ -1209,17 +1169,10 @@ xfs_ioctl_setattr_dax_invalidate(
>   * have permission to do so. On success, return a clean transaction and the
>   * inode locked exclusively ready for further operation specific checks. On
>   * failure, return an error without modifying or locking the inode.
> - *
> - * The inode might already be IO locked on call. If this is the case, it is
> - * indicated in @join_flags and we take full responsibility for ensuring they
> - * are unlocked from now on. Hence if we have an error here, we still have to
> - * unlock them. Otherwise, once they are joined to the transaction, they will
> - * be unlocked on commit/cancel.
>   */
>  static struct xfs_trans *
>  xfs_ioctl_setattr_get_trans(
> -	struct xfs_inode	*ip,
> -	int			join_flags)
> +	struct xfs_inode	*ip)
>  {
>  	struct xfs_mount	*mp = ip->i_mount;
>  	struct xfs_trans	*tp;
> @@ -1236,8 +1189,7 @@ xfs_ioctl_setattr_get_trans(
>  		goto out_unlock;
>  
>  	xfs_ilock(ip, XFS_ILOCK_EXCL);
> -	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
> -	join_flags = 0;
> +	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
>  
>  	/*
>  	 * CAP_FOWNER overrides the following restrictions:
> @@ -1258,8 +1210,6 @@ xfs_ioctl_setattr_get_trans(
>  out_cancel:
>  	xfs_trans_cancel(tp);
>  out_unlock:
> -	if (join_flags)
> -		xfs_iunlock(ip, join_flags);
>  	return ERR_PTR(error);
>  }
>  
> @@ -1386,7 +1336,6 @@ xfs_ioctl_setattr(
>  	struct xfs_dquot	*pdqp = NULL;
>  	struct xfs_dquot	*olddquot = NULL;
>  	int			code;
> -	int			join_flags = 0;
>  
>  	trace_xfs_ioctl_setattr(ip);
>  
> @@ -1410,18 +1359,9 @@ xfs_ioctl_setattr(
>  			return code;
>  	}
>  
> -	/*
> -	 * Changing DAX config may require inode locking for mapping
> -	 * invalidation. These need to be held all the way to transaction commit
> -	 * or cancel time, so need to be passed through to
> -	 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
> -	 * appropriately.
> -	 */
> -	code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
> -	if (code)
> -		goto error_free_dquots;
> +	xfs_ioctl_setattr_dax_invalidate(ip, fa);
>  
> -	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
> +	tp = xfs_ioctl_setattr_get_trans(ip);
>  	if (IS_ERR(tp)) {
>  		code = PTR_ERR(tp);
>  		goto error_free_dquots;
> @@ -1552,7 +1492,6 @@ xfs_ioc_setxflags(
>  	struct fsxattr		fa;
>  	struct fsxattr		old_fa;
>  	unsigned int		flags;
> -	int			join_flags = 0;
>  	int			error;
>  
>  	if (copy_from_user(&flags, arg, sizeof(flags)))
> @@ -1569,18 +1508,9 @@ xfs_ioc_setxflags(
>  	if (error)
>  		return error;
>  
> -	/*
> -	 * Changing DAX config may require inode locking for mapping
> -	 * invalidation. These need to be held all the way to transaction commit
> -	 * or cancel time, so need to be passed through to
> -	 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
> -	 * appropriately.
> -	 */
> -	error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
> -	if (error)
> -		goto out_drop_write;
> +	xfs_ioctl_setattr_dax_invalidate(ip, &fa);
>  
> -	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
> +	tp = xfs_ioctl_setattr_get_trans(ip);
>  	if (IS_ERR(tp)) {
>  		error = PTR_ERR(tp);
>  		goto out_drop_write;
> -- 
> 2.25.1
>
Ira Weiny April 13, 2020, 7:46 p.m. UTC | #2
On Mon, Apr 13, 2020 at 09:12:40AM -0700, Darrick J. Wong wrote:
> On Sun, Apr 12, 2020 at 10:40:45PM -0700, ira.weiny@intel.com wrote:
> > From: Ira Weiny <ira.weiny@intel.com>
> > 
> > We only support changing FS_XFLAG_DAX on directories.  Files get their
> > flag from the parent directory on creation only.  So no data
> > invalidation needs to happen.
> > 
> > Alter the xfs_ioctl_setattr_dax_invalidate() to be
> > xfs_ioctl_setattr_dax_validate().  xfs_ioctl_setattr_dax_validate() now
> > validates that any FS_XFLAG_DAX change is ok.
> > 
> > This also allows use to remove the join_flags logic.
> > 
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> > 
> > ---
> > Changes from v6:
> > 	Fix completely broken implementation and update commit message.
> > 	Use the new VFS layer I_DONTCACHE to facilitate inode eviction
> > 	and S_DAX changing on drop_caches
> > 
> > Changes from v5:
> > 	New patch
> > ---
> >  fs/xfs/xfs_ioctl.c | 102 +++++++--------------------------------------
> >  1 file changed, 16 insertions(+), 86 deletions(-)
> > 
> > diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> > index c6cd92ef4a05..ba42a5fb5b05 100644
> > --- a/fs/xfs/xfs_ioctl.c
> > +++ b/fs/xfs/xfs_ioctl.c
> > @@ -1145,63 +1145,23 @@ xfs_ioctl_setattr_xflags(
> >  }
> >  
> >  /*
> > - * If we are changing DAX flags, we have to ensure the file is clean and any
> > - * cached objects in the address space are invalidated and removed. This
> > - * requires us to lock out other IO and page faults similar to a truncate
> > - * operation. The locks need to be held until the transaction has been committed
> > - * so that the cache invalidation is atomic with respect to the DAX flag
> > - * manipulation.
> > + * Mark inodes with a changing FS_XFLAG_DAX, I_DONTCACHE
> >   */
> > -static int
> > +static void
> >  xfs_ioctl_setattr_dax_invalidate(
> >  	struct xfs_inode	*ip,
> > -	struct fsxattr		*fa,
> > -	int			*join_flags)
> > +	struct fsxattr		*fa)
> >  {
> > -	struct inode		*inode = VFS_I(ip);
> > -	struct super_block	*sb = inode->i_sb;
> > -	int			error;
> > -
> > -	*join_flags = 0;
> > -
> > -	/*
> > -	 * It is only valid to set the DAX flag on regular files and
> > -	 * directories on filesystems where the block size is equal to the page
> > -	 * size. On directories it serves as an inherited hint so we don't
> > -	 * have to check the device for dax support or flush pagecache.
> > -	 */
> > -	if (fa->fsx_xflags & FS_XFLAG_DAX) {
> > -		struct xfs_buftarg	*target = xfs_inode_buftarg(ip);
> > -
> > -		if (!bdev_dax_supported(target->bt_bdev, sb->s_blocksize))
> > -			return -EINVAL;
> > -	}
> > -
> > -	/* If the DAX state is not changing, we have nothing to do here. */
> > -	if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
> > -		return 0;
> > -	if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
> > -		return 0;
> > +	struct inode            *inode = VFS_I(ip);
> >  
> >  	if (S_ISDIR(inode->i_mode))
> > -		return 0;
> > -
> > -	/* lock, flush and invalidate mapping in preparation for flag change */
> > -	xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
> > -	error = filemap_write_and_wait(inode->i_mapping);
> > -	if (error)
> > -		goto out_unlock;
> > -	error = invalidate_inode_pages2(inode->i_mapping);
> > -	if (error)
> > -		goto out_unlock;
> > -
> > -	*join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
> > -	return 0;
> > -
> > -out_unlock:
> > -	xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
> > -	return error;
> > +		return;
> 
> We also need a check up here to skip the I_DONTCACHE setting if the
> admin has set a mount option to override the inode flag.

Yes that would be more optimal!

Thanks,
Ira

> 
> The rest looks good to me.
> 
> --D
> 
> > +	if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
> > +	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) ||
> > +	    (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
> > +	     (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)))
> > +		inode->i_state |= I_DONTCACHE;
> >  }
> >  
> >  /*
> > @@ -1209,17 +1169,10 @@ xfs_ioctl_setattr_dax_invalidate(
> >   * have permission to do so. On success, return a clean transaction and the
> >   * inode locked exclusively ready for further operation specific checks. On
> >   * failure, return an error without modifying or locking the inode.
> > - *
> > - * The inode might already be IO locked on call. If this is the case, it is
> > - * indicated in @join_flags and we take full responsibility for ensuring they
> > - * are unlocked from now on. Hence if we have an error here, we still have to
> > - * unlock them. Otherwise, once they are joined to the transaction, they will
> > - * be unlocked on commit/cancel.
> >   */
> >  static struct xfs_trans *
> >  xfs_ioctl_setattr_get_trans(
> > -	struct xfs_inode	*ip,
> > -	int			join_flags)
> > +	struct xfs_inode	*ip)
> >  {
> >  	struct xfs_mount	*mp = ip->i_mount;
> >  	struct xfs_trans	*tp;
> > @@ -1236,8 +1189,7 @@ xfs_ioctl_setattr_get_trans(
> >  		goto out_unlock;
> >  
> >  	xfs_ilock(ip, XFS_ILOCK_EXCL);
> > -	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
> > -	join_flags = 0;
> > +	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
> >  
> >  	/*
> >  	 * CAP_FOWNER overrides the following restrictions:
> > @@ -1258,8 +1210,6 @@ xfs_ioctl_setattr_get_trans(
> >  out_cancel:
> >  	xfs_trans_cancel(tp);
> >  out_unlock:
> > -	if (join_flags)
> > -		xfs_iunlock(ip, join_flags);
> >  	return ERR_PTR(error);
> >  }
> >  
> > @@ -1386,7 +1336,6 @@ xfs_ioctl_setattr(
> >  	struct xfs_dquot	*pdqp = NULL;
> >  	struct xfs_dquot	*olddquot = NULL;
> >  	int			code;
> > -	int			join_flags = 0;
> >  
> >  	trace_xfs_ioctl_setattr(ip);
> >  
> > @@ -1410,18 +1359,9 @@ xfs_ioctl_setattr(
> >  			return code;
> >  	}
> >  
> > -	/*
> > -	 * Changing DAX config may require inode locking for mapping
> > -	 * invalidation. These need to be held all the way to transaction commit
> > -	 * or cancel time, so need to be passed through to
> > -	 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
> > -	 * appropriately.
> > -	 */
> > -	code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
> > -	if (code)
> > -		goto error_free_dquots;
> > +	xfs_ioctl_setattr_dax_invalidate(ip, fa);
> >  
> > -	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
> > +	tp = xfs_ioctl_setattr_get_trans(ip);
> >  	if (IS_ERR(tp)) {
> >  		code = PTR_ERR(tp);
> >  		goto error_free_dquots;
> > @@ -1552,7 +1492,6 @@ xfs_ioc_setxflags(
> >  	struct fsxattr		fa;
> >  	struct fsxattr		old_fa;
> >  	unsigned int		flags;
> > -	int			join_flags = 0;
> >  	int			error;
> >  
> >  	if (copy_from_user(&flags, arg, sizeof(flags)))
> > @@ -1569,18 +1508,9 @@ xfs_ioc_setxflags(
> >  	if (error)
> >  		return error;
> >  
> > -	/*
> > -	 * Changing DAX config may require inode locking for mapping
> > -	 * invalidation. These need to be held all the way to transaction commit
> > -	 * or cancel time, so need to be passed through to
> > -	 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
> > -	 * appropriately.
> > -	 */
> > -	error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
> > -	if (error)
> > -		goto out_drop_write;
> > +	xfs_ioctl_setattr_dax_invalidate(ip, &fa);
> >  
> > -	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
> > +	tp = xfs_ioctl_setattr_get_trans(ip);
> >  	if (IS_ERR(tp)) {
> >  		error = PTR_ERR(tp);
> >  		goto out_drop_write;
> > -- 
> > 2.25.1
> >
diff mbox series

Patch

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index c6cd92ef4a05..ba42a5fb5b05 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1145,63 +1145,23 @@  xfs_ioctl_setattr_xflags(
 }
 
 /*
- * If we are changing DAX flags, we have to ensure the file is clean and any
- * cached objects in the address space are invalidated and removed. This
- * requires us to lock out other IO and page faults similar to a truncate
- * operation. The locks need to be held until the transaction has been committed
- * so that the cache invalidation is atomic with respect to the DAX flag
- * manipulation.
+ * Mark inodes with a changing FS_XFLAG_DAX, I_DONTCACHE
  */
-static int
+static void
 xfs_ioctl_setattr_dax_invalidate(
 	struct xfs_inode	*ip,
-	struct fsxattr		*fa,
-	int			*join_flags)
+	struct fsxattr		*fa)
 {
-	struct inode		*inode = VFS_I(ip);
-	struct super_block	*sb = inode->i_sb;
-	int			error;
-
-	*join_flags = 0;
-
-	/*
-	 * It is only valid to set the DAX flag on regular files and
-	 * directories on filesystems where the block size is equal to the page
-	 * size. On directories it serves as an inherited hint so we don't
-	 * have to check the device for dax support or flush pagecache.
-	 */
-	if (fa->fsx_xflags & FS_XFLAG_DAX) {
-		struct xfs_buftarg	*target = xfs_inode_buftarg(ip);
-
-		if (!bdev_dax_supported(target->bt_bdev, sb->s_blocksize))
-			return -EINVAL;
-	}
-
-	/* If the DAX state is not changing, we have nothing to do here. */
-	if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
-		return 0;
-	if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
-		return 0;
+	struct inode            *inode = VFS_I(ip);
 
 	if (S_ISDIR(inode->i_mode))
-		return 0;
-
-	/* lock, flush and invalidate mapping in preparation for flag change */
-	xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
-	error = filemap_write_and_wait(inode->i_mapping);
-	if (error)
-		goto out_unlock;
-	error = invalidate_inode_pages2(inode->i_mapping);
-	if (error)
-		goto out_unlock;
-
-	*join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
-	return 0;
-
-out_unlock:
-	xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
-	return error;
+		return;
 
+	if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
+	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) ||
+	    (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
+	     (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)))
+		inode->i_state |= I_DONTCACHE;
 }
 
 /*
@@ -1209,17 +1169,10 @@  xfs_ioctl_setattr_dax_invalidate(
  * have permission to do so. On success, return a clean transaction and the
  * inode locked exclusively ready for further operation specific checks. On
  * failure, return an error without modifying or locking the inode.
- *
- * The inode might already be IO locked on call. If this is the case, it is
- * indicated in @join_flags and we take full responsibility for ensuring they
- * are unlocked from now on. Hence if we have an error here, we still have to
- * unlock them. Otherwise, once they are joined to the transaction, they will
- * be unlocked on commit/cancel.
  */
 static struct xfs_trans *
 xfs_ioctl_setattr_get_trans(
-	struct xfs_inode	*ip,
-	int			join_flags)
+	struct xfs_inode	*ip)
 {
 	struct xfs_mount	*mp = ip->i_mount;
 	struct xfs_trans	*tp;
@@ -1236,8 +1189,7 @@  xfs_ioctl_setattr_get_trans(
 		goto out_unlock;
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
-	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
-	join_flags = 0;
+	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 
 	/*
 	 * CAP_FOWNER overrides the following restrictions:
@@ -1258,8 +1210,6 @@  xfs_ioctl_setattr_get_trans(
 out_cancel:
 	xfs_trans_cancel(tp);
 out_unlock:
-	if (join_flags)
-		xfs_iunlock(ip, join_flags);
 	return ERR_PTR(error);
 }
 
@@ -1386,7 +1336,6 @@  xfs_ioctl_setattr(
 	struct xfs_dquot	*pdqp = NULL;
 	struct xfs_dquot	*olddquot = NULL;
 	int			code;
-	int			join_flags = 0;
 
 	trace_xfs_ioctl_setattr(ip);
 
@@ -1410,18 +1359,9 @@  xfs_ioctl_setattr(
 			return code;
 	}
 
-	/*
-	 * Changing DAX config may require inode locking for mapping
-	 * invalidation. These need to be held all the way to transaction commit
-	 * or cancel time, so need to be passed through to
-	 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
-	 * appropriately.
-	 */
-	code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
-	if (code)
-		goto error_free_dquots;
+	xfs_ioctl_setattr_dax_invalidate(ip, fa);
 
-	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
+	tp = xfs_ioctl_setattr_get_trans(ip);
 	if (IS_ERR(tp)) {
 		code = PTR_ERR(tp);
 		goto error_free_dquots;
@@ -1552,7 +1492,6 @@  xfs_ioc_setxflags(
 	struct fsxattr		fa;
 	struct fsxattr		old_fa;
 	unsigned int		flags;
-	int			join_flags = 0;
 	int			error;
 
 	if (copy_from_user(&flags, arg, sizeof(flags)))
@@ -1569,18 +1508,9 @@  xfs_ioc_setxflags(
 	if (error)
 		return error;
 
-	/*
-	 * Changing DAX config may require inode locking for mapping
-	 * invalidation. These need to be held all the way to transaction commit
-	 * or cancel time, so need to be passed through to
-	 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
-	 * appropriately.
-	 */
-	error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
-	if (error)
-		goto out_drop_write;
+	xfs_ioctl_setattr_dax_invalidate(ip, &fa);
 
-	tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
+	tp = xfs_ioctl_setattr_get_trans(ip);
 	if (IS_ERR(tp)) {
 		error = PTR_ERR(tp);
 		goto out_drop_write;