1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _IP_SET_TIMEOUT_H
3 #define _IP_SET_TIMEOUT_H
5 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
10 /* How often should the gc be run by default */
11 #define IPSET_GC_TIME (3 * 60)
13 /* Timeout period depending on the timeout value of the given set */
14 #define IPSET_GC_PERIOD(timeout) \
15 ((timeout/3) ? min_t(u32, (timeout)/3, IPSET_GC_TIME) : 1)
17 /* Entry is set with no timeout value */
18 #define IPSET_ELEM_PERMANENT 0
20 /* Set is defined with timeout support: timeout value may be 0 */
21 #define IPSET_NO_TIMEOUT UINT_MAX
23 /* Max timeout value, see msecs_to_jiffies() in jiffies.h */
24 #define IPSET_MAX_TIMEOUT (UINT_MAX >> 1)/MSEC_PER_SEC
26 #define ip_set_adt_opt_timeout(opt, set) \
27 ((opt)->ext.timeout != IPSET_NO_TIMEOUT ? (opt)->ext.timeout : (set)->timeout)
29 static inline unsigned int
30 ip_set_timeout_uget(struct nlattr *tb)
32 unsigned int timeout = ip_set_get_h32(tb);
34 /* Normalize to fit into jiffies */
35 if (timeout > IPSET_MAX_TIMEOUT)
36 timeout = IPSET_MAX_TIMEOUT;
42 ip_set_timeout_expired(const unsigned long *t)
44 return *t != IPSET_ELEM_PERMANENT && time_is_before_jiffies(*t);
48 ip_set_timeout_set(unsigned long *timeout, u32 value)
53 *timeout = IPSET_ELEM_PERMANENT;
57 t = msecs_to_jiffies(value * MSEC_PER_SEC) + jiffies;
58 if (t == IPSET_ELEM_PERMANENT)
65 ip_set_timeout_get(const unsigned long *timeout)
69 if (*timeout == IPSET_ELEM_PERMANENT)
72 t = jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC;
73 /* Zero value in userspace means no timeout */
74 return t == 0 ? 1 : t;
77 #endif /* __KERNEL__ */
78 #endif /* _IP_SET_TIMEOUT_H */