classifier: Prepare for "struct cls_rule" needing to be destroyed.

Until now, "struct cls_rule" didn't own any data outside its own memory
block.  An upcoming commit will make "struct cls_rule" sometimes own blocks
of memory, so it needs "destroy" and to a lesser extent "clone" functions.
This commit adds these in advance, even though they are mostly no-ops, to
make it possible to separately review the memory management.

Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/classifier.h b/lib/classifier.h
index 3370ce8b..341c3441 100644
--- a/lib/classifier.h
+++ b/lib/classifier.h
@@ -70,6 +70,8 @@ struct cls_rule {
 
 void cls_rule_init(struct cls_rule *,
                    const struct match *, unsigned int priority);
+void cls_rule_clone(struct cls_rule *, const struct cls_rule *);
+void cls_rule_destroy(struct cls_rule *);
 
 bool cls_rule_equal(const struct cls_rule *, const struct cls_rule *);
 uint32_t cls_rule_hash(const struct cls_rule *, uint32_t basis);