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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _IP_SET_TIMEOUT_H
#define _IP_SET_TIMEOUT_H
/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
*/
#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
/* Max timeout value, see msecs_to_jiffies() in jiffies.h */
#define IPSET_MAX_TIMEOUT (UINT_MAX >> 1)/MSEC_PER_SEC
#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 > IPSET_MAX_TIMEOUT)
timeout = IPSET_MAX_TIMEOUT;
return timeout;
}
static inline bool
ip_set_timeout_expired(const unsigned long *t)
{
return *t != IPSET_ELEM_PERMANENT && time_is_before_jiffies(*t);
}
static inline void
ip_set_timeout_set(unsigned long *timeout, u32 value)
{
unsigned long t;
if (!value) {
*timeout = IPSET_ELEM_PERMANENT;
return;
}
t = msecs_to_jiffies(value * MSEC_PER_SEC) + jiffies;
if (t == IPSET_ELEM_PERMANENT)
/* Bingo! :-) */
t--;
*timeout = t;
}
static inline u32
ip_set_timeout_get(const unsigned long *timeout)
{
u32 t;
if (*timeout == IPSET_ELEM_PERMANENT)
return 0;
t = jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC;
/* Zero value in userspace means no timeout */
return t == 0 ? 1 : t;
}
#endif /* __KERNEL__ */
#endif /* _IP_SET_TIMEOUT_H */
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