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-rw-r--r--fs/xfs/xfs_iops.c28
1 files changed, 22 insertions, 6 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 462f89af479a..1814f10e43d3 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -1243,13 +1243,12 @@ xfs_inode_supports_dax(
{
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))
+ /* Only supported on regular files. */
+ if (!S_ISREG(VFS_I(ip)->i_mode))
return false;
- /* DAX mount option or DAX iflag must be set. */
- if (!(mp->m_flags & XFS_MOUNT_DAX_ALWAYS) &&
- !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
+ /* Only supported on non-reflinked files. */
+ if (xfs_is_reflink_inode(ip))
return false;
/* Block size must match page size */
@@ -1260,6 +1259,23 @@ xfs_inode_supports_dax(
return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
}
+static bool
+xfs_inode_should_enable_dax(
+ struct xfs_inode *ip)
+{
+ if (!IS_ENABLED(CONFIG_FS_DAX))
+ return false;
+ if (ip->i_mount->m_flags & XFS_MOUNT_DAX_NEVER)
+ return false;
+ if (!xfs_inode_supports_dax(ip))
+ return false;
+ if (ip->i_mount->m_flags & XFS_MOUNT_DAX_ALWAYS)
+ return true;
+ if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
+ return true;
+ return false;
+}
+
STATIC void
xfs_diflags_to_iflags(
struct inode *inode,
@@ -1278,7 +1294,7 @@ 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_should_enable_dax(ip))
inode->i_flags |= S_DAX;
}