From: Darrick J. Wong <djwong@xxxxxxxxxx>
When mkfs creates a new file as a child of an existing directory, we
should propagate the flags2 field from parent to child like the kernel
does. This ensures that mkfs propagates cowextsize hints properly when
protofiles are in use.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
libxfs/inode.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/libxfs/inode.c b/libxfs/inode.c
index c63cc0543d6..9835c708021 100644
--- a/libxfs/inode.c
+++ b/libxfs/inode.c
@@ -59,6 +59,20 @@ xfs_inode_propagate_flags(
ip->i_diflags |= di_flags;
}
+/* Propagate di_flags2 from a parent inode to a child inode. */
+static void
+xfs_inode_inherit_flags2(
+ struct xfs_inode *ip,
+ const struct xfs_inode *pip)
+{
+ if (pip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) {
+ ip->i_diflags2 |= XFS_DIFLAG2_COWEXTSIZE;
+ ip->i_cowextsize = pip->i_cowextsize;
+ }
+ if (pip->i_diflags2 & XFS_DIFLAG2_DAX)
+ ip->i_diflags2 |= XFS_DIFLAG2_DAX;
+}
+
/*
* Initialise a newly allocated inode and return the in-core inode to the
* caller locked exclusively.
@@ -123,6 +137,8 @@ libxfs_icreate(
case S_IFDIR:
if (pip && (pip->i_diflags & XFS_DIFLAG_ANY))
xfs_inode_propagate_flags(ip, pip);
+ if (pip && (pip->i_diflags2 & XFS_DIFLAG2_ANY))
+ xfs_inode_inherit_flags2(ip, pip);
/* FALLTHROUGH */
case S_IFLNK:
ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;
