1 files changed, 36 insertions, 0 deletions
diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c
index 2645abddad78..f43dce771cdd 100644
--- a/fs/xfs/scrub/repair.c
+++ b/fs/xfs/scrub/repair.c
@@ -1165,3 +1165,39 @@ xrep_setup_xfbtree(
 
 	return xmbuf_alloc(sc->mp, descr, &sc->xmbtp);
 }
+
+/*
+ * Create a dummy transaction for use in a live update hook function.  This
+ * function MUST NOT be called from regular repair code because the current
+ * process' transaction is saved via the cookie.
+ */
+int
+xrep_trans_alloc_hook_dummy(
+	struct xfs_mount	*mp,
+	void			**cookiep,
+	struct xfs_trans	**tpp)
+{
+	int			error;
+
+	*cookiep = current->journal_info;
+	current->journal_info = NULL;
+
+	error = xfs_trans_alloc_empty(mp, tpp);
+	if (!error)
+		return 0;
+
+	current->journal_info = *cookiep;
+	*cookiep = NULL;
+	return error;
+}
+
+/* Cancel a dummy transaction used by a live update hook function. */
+void
+xrep_trans_cancel_hook_dummy(
+	void			**cookiep,
+	struct xfs_trans	*tp)
+{
+	xfs_trans_cancel(tp);
+	current->journal_info = *cookiep;
+	*cookiep = NULL;
+}