+
+ ctx->in_group = false;
+}
+
+static bool
+xlate_group_resource_check(struct xlate_ctx *ctx)
+{
+ if (!xlate_resubmit_resource_check(ctx)) {
+ return false;
+ } else if (ctx->in_group) {
+ /* Prevent nested translation of OpenFlow groups.
+ *
+ * OpenFlow allows this restriction. We enforce this restriction only
+ * because, with the current architecture, we would otherwise have to
+ * take a possibly recursive read lock on the ofgroup rwlock, which is
+ * unsafe given that POSIX allows taking a read lock to block if there
+ * is a thread blocked on taking the write lock. Other solutions
+ * without this restriction are also possible, but seem unwarranted
+ * given the current limited use of groups. */
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
+
+ VLOG_ERR_RL(&rl, "cannot recursively translate OpenFlow group");
+ return false;
+ } else {
+ return true;
+ }