diff mbox series

[V4,06/13] fs/xfs: Create function xfs_inode_enable_dax()

Message ID 20200221004134.30599-7-ira.weiny@intel.com
State Superseded
Headers show
Series Enable per-file/per-directory DAX operations V4 | expand

Commit Message

Ira Weiny Feb. 21, 2020, 12:41 a.m. UTC
From: Ira Weiny <ira.weiny@intel.com>

xfs_inode_supports_dax() should reflect if the inode can support DAX not
that it is enabled for DAX.

Change the use of xfs_inode_supports_dax() to reflect only if the inode
and underlying storage support dax.

Add a new function xfs_inode_enable_dax() which reflects if the inode
should be enabled for DAX.

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

---
Changes from v3:
	Update functions and names to be more clear
	Update commit message
	Merge with
		'fs/xfs: Clean up DAX support check'
		don't allow IS_DAX() on a directory
		use STATIC macro for static
		make xfs_inode_supports_dax() static
---
 fs/xfs/xfs_iops.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

Comments

Darrick J. Wong Feb. 22, 2020, 12:28 a.m. UTC | #1
On Thu, Feb 20, 2020 at 04:41:27PM -0800, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
> 
> xfs_inode_supports_dax() should reflect if the inode can support DAX not
> that it is enabled for DAX.
> 
> Change the use of xfs_inode_supports_dax() to reflect only if the inode
> and underlying storage support dax.
> 
> Add a new function xfs_inode_enable_dax() which reflects if the inode

Heavily into bikeshedding here, but "enable" sounds like a verb, but
this function doesn't actually turn dax on for a file, it merely decides
if we /should/ turn it on.

xfs_inode_wants_dax() ?

--D

> should be enabled for DAX.
> 
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> 
> ---
> Changes from v3:
> 	Update functions and names to be more clear
> 	Update commit message
> 	Merge with
> 		'fs/xfs: Clean up DAX support check'
> 		don't allow IS_DAX() on a directory
> 		use STATIC macro for static
> 		make xfs_inode_supports_dax() static
> ---
>  fs/xfs/xfs_iops.c | 25 +++++++++++++++++++------
>  1 file changed, 19 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index 81f2f93caec0..ff711efc5247 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -1237,19 +1237,18 @@ static const struct inode_operations xfs_inline_symlink_inode_operations = {
>  };
>  
>  /* Figure out if this file actually supports DAX. */
> -static bool
> +STATIC bool
>  xfs_inode_supports_dax(
>  	struct xfs_inode	*ip)
>  {
>  	struct xfs_mount	*mp = ip->i_mount;
>  
>  	/* Only supported on non-reflinked files. */
> -	if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip))
> +	if (xfs_is_reflink_inode(ip))
>  		return false;
>  
> -	/* DAX mount option or DAX iflag must be set. */
> -	if (!(mp->m_flags & XFS_MOUNT_DAX) &&
> -	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
> +	/* Only supported on regular files. */
> +	if (!S_ISREG(VFS_I(ip)->i_mode))
>  		return false;
>  
>  	/* Block size must match page size */
> @@ -1260,6 +1259,20 @@ xfs_inode_supports_dax(
>  	return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
>  }
>  
> +STATIC bool
> +xfs_inode_enable_dax(
> +	struct xfs_inode *ip)
> +{
> +	if (!xfs_inode_supports_dax(ip))
> +		return false;
> +
> +	if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
> +		return true;
> +	if (ip->i_mount->m_flags & XFS_MOUNT_DAX)
> +		return true;
> +	return false;
> +}
> +
>  STATIC void
>  xfs_diflags_to_iflags(
>  	struct inode		*inode,
> @@ -1278,7 +1291,7 @@ xfs_diflags_to_iflags(
>  		inode->i_flags |= S_SYNC;
>  	if (flags & XFS_DIFLAG_NOATIME)
>  		inode->i_flags |= S_NOATIME;
> -	if (xfs_inode_supports_dax(ip))
> +	if (xfs_inode_enable_dax(ip))
>  		inode->i_flags |= S_DAX;
>  }
>  
> -- 
> 2.21.0
>
Ira Weiny Feb. 23, 2020, 3:07 p.m. UTC | #2
On Fri, Feb 21, 2020 at 04:28:21PM -0800, Darrick J. Wong wrote:
> On Thu, Feb 20, 2020 at 04:41:27PM -0800, ira.weiny@intel.com wrote:
> > From: Ira Weiny <ira.weiny@intel.com>
> > 
> > xfs_inode_supports_dax() should reflect if the inode can support DAX not
> > that it is enabled for DAX.
> > 
> > Change the use of xfs_inode_supports_dax() to reflect only if the inode
> > and underlying storage support dax.
> > 
> > Add a new function xfs_inode_enable_dax() which reflects if the inode
> 
> Heavily into bikeshedding here, but "enable" sounds like a verb, but
> this function doesn't actually turn dax on for a file, it merely decides
> if we /should/ turn it on.

heheheheh...  As Dave said "names are hard"...  :-/

> 
> xfs_inode_wants_dax() ?

I viewed this as a question as in "enable dax"?

And I _think_ Dave actually suggested the name.

I'll contemplate it some,
Ira

> 
> --D
> 
> > should be enabled for DAX.
> > 
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> > 
> > ---
> > Changes from v3:
> > 	Update functions and names to be more clear
> > 	Update commit message
> > 	Merge with
> > 		'fs/xfs: Clean up DAX support check'
> > 		don't allow IS_DAX() on a directory
> > 		use STATIC macro for static
> > 		make xfs_inode_supports_dax() static
> > ---
> >  fs/xfs/xfs_iops.c | 25 +++++++++++++++++++------
> >  1 file changed, 19 insertions(+), 6 deletions(-)
> > 
> > diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> > index 81f2f93caec0..ff711efc5247 100644
> > --- a/fs/xfs/xfs_iops.c
> > +++ b/fs/xfs/xfs_iops.c
> > @@ -1237,19 +1237,18 @@ static const struct inode_operations xfs_inline_symlink_inode_operations = {
> >  };
> >  
> >  /* Figure out if this file actually supports DAX. */
> > -static bool
> > +STATIC bool
> >  xfs_inode_supports_dax(
> >  	struct xfs_inode	*ip)
> >  {
> >  	struct xfs_mount	*mp = ip->i_mount;
> >  
> >  	/* Only supported on non-reflinked files. */
> > -	if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip))
> > +	if (xfs_is_reflink_inode(ip))
> >  		return false;
> >  
> > -	/* DAX mount option or DAX iflag must be set. */
> > -	if (!(mp->m_flags & XFS_MOUNT_DAX) &&
> > -	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
> > +	/* Only supported on regular files. */
> > +	if (!S_ISREG(VFS_I(ip)->i_mode))
> >  		return false;
> >  
> >  	/* Block size must match page size */
> > @@ -1260,6 +1259,20 @@ xfs_inode_supports_dax(
> >  	return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
> >  }
> >  
> > +STATIC bool
> > +xfs_inode_enable_dax(
> > +	struct xfs_inode *ip)
> > +{
> > +	if (!xfs_inode_supports_dax(ip))
> > +		return false;
> > +
> > +	if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
> > +		return true;
> > +	if (ip->i_mount->m_flags & XFS_MOUNT_DAX)
> > +		return true;
> > +	return false;
> > +}
> > +
> >  STATIC void
> >  xfs_diflags_to_iflags(
> >  	struct inode		*inode,
> > @@ -1278,7 +1291,7 @@ xfs_diflags_to_iflags(
> >  		inode->i_flags |= S_SYNC;
> >  	if (flags & XFS_DIFLAG_NOATIME)
> >  		inode->i_flags |= S_NOATIME;
> > -	if (xfs_inode_supports_dax(ip))
> > +	if (xfs_inode_enable_dax(ip))
> >  		inode->i_flags |= S_DAX;
> >  }
> >  
> > -- 
> > 2.21.0
> >
diff mbox series

Patch

diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 81f2f93caec0..ff711efc5247 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1237,19 +1237,18 @@  static const struct inode_operations xfs_inline_symlink_inode_operations = {
 };
 
 /* Figure out if this file actually supports DAX. */
-static bool
+STATIC bool
 xfs_inode_supports_dax(
 	struct xfs_inode	*ip)
 {
 	struct xfs_mount	*mp = ip->i_mount;
 
 	/* Only supported on non-reflinked files. */
-	if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip))
+	if (xfs_is_reflink_inode(ip))
 		return false;
 
-	/* DAX mount option or DAX iflag must be set. */
-	if (!(mp->m_flags & XFS_MOUNT_DAX) &&
-	    !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
+	/* Only supported on regular files. */
+	if (!S_ISREG(VFS_I(ip)->i_mode))
 		return false;
 
 	/* Block size must match page size */
@@ -1260,6 +1259,20 @@  xfs_inode_supports_dax(
 	return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
 }
 
+STATIC bool
+xfs_inode_enable_dax(
+	struct xfs_inode *ip)
+{
+	if (!xfs_inode_supports_dax(ip))
+		return false;
+
+	if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
+		return true;
+	if (ip->i_mount->m_flags & XFS_MOUNT_DAX)
+		return true;
+	return false;
+}
+
 STATIC void
 xfs_diflags_to_iflags(
 	struct inode		*inode,
@@ -1278,7 +1291,7 @@  xfs_diflags_to_iflags(
 		inode->i_flags |= S_SYNC;
 	if (flags & XFS_DIFLAG_NOATIME)
 		inode->i_flags |= S_NOATIME;
-	if (xfs_inode_supports_dax(ip))
+	if (xfs_inode_enable_dax(ip))
 		inode->i_flags |= S_DAX;
 }