1 files changed, 78 insertions, 0 deletions
diff --git a/include/linux/netfilter/ipset/ip_set_timeout.h b/include/linux/netfilter/ipset/ip_set_timeout.h
new file mode 100644
index 000000000..83c2f9e08
--- /dev/null
+++ b/include/linux/netfilter/ipset/ip_set_timeout.h
@@ -0,0 +1,78 @@
+#ifndef _IP_SET_TIMEOUT_H
+#define _IP_SET_TIMEOUT_H
+
+/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifdef __KERNEL__
+
+/* How often should the gc be run by default */
+#define IPSET_GC_TIME			(3 * 60)
+
+/* Timeout period depending on the timeout value of the given set */
+#define IPSET_GC_PERIOD(timeout) \
+	((timeout/3) ? min_t(u32, (timeout)/3, IPSET_GC_TIME) : 1)
+
+/* Entry is set with no timeout value */
+#define IPSET_ELEM_PERMANENT	0
+
+/* Set is defined with timeout support: timeout value may be 0 */
+#define IPSET_NO_TIMEOUT	UINT_MAX
+
+#define ip_set_adt_opt_timeout(opt, set)	\
+((opt)->ext.timeout != IPSET_NO_TIMEOUT ? (opt)->ext.timeout : (set)->timeout)
+
+static inline unsigned int
+ip_set_timeout_uget(struct nlattr *tb)
+{
+	unsigned int timeout = ip_set_get_h32(tb);
+
+	/* Normalize to fit into jiffies */
+	if (timeout > UINT_MAX/MSEC_PER_SEC)
+		timeout = UINT_MAX/MSEC_PER_SEC;
+
+	/* Userspace supplied TIMEOUT parameter: adjust crazy size */
+	return timeout == IPSET_NO_TIMEOUT ? IPSET_NO_TIMEOUT - 1 : timeout;
+}
+
+static inline bool
+ip_set_timeout_test(unsigned long timeout)
+{
+	return timeout == IPSET_ELEM_PERMANENT ||
+	       time_is_after_jiffies(timeout);
+}
+
+static inline bool
+ip_set_timeout_expired(unsigned long *timeout)
+{
+	return *timeout != IPSET_ELEM_PERMANENT &&
+	       time_is_before_jiffies(*timeout);
+}
+
+static inline void
+ip_set_timeout_set(unsigned long *timeout, u32 t)
+{
+	if (!t) {
+		*timeout = IPSET_ELEM_PERMANENT;
+		return;
+	}
+
+	*timeout = msecs_to_jiffies(t * 1000) + jiffies;
+	if (*timeout == IPSET_ELEM_PERMANENT)
+		/* Bingo! :-) */
+		(*timeout)--;
+}
+
+static inline u32
+ip_set_timeout_get(unsigned long *timeout)
+{
+	return *timeout == IPSET_ELEM_PERMANENT ? 0 :
+		jiffies_to_msecs(*timeout - jiffies)/1000;
+}
+
+#endif	/* __KERNEL__ */
+#endif /* _IP_SET_TIMEOUT_H */