#ifndef _IP_SET_TIMEOUT_H
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#define _IP_SET_TIMEOUT_H
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/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifdef __KERNEL__
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/* How often should the gc be run by default */
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#define IPSET_GC_TIME (3 * 60)
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/* Timeout period depending on the timeout value of the given set */
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#define IPSET_GC_PERIOD(timeout) \
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((timeout/3) ? min_t(u32, (timeout)/3, IPSET_GC_TIME) : 1)
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/* Entry is set with no timeout value */
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#define IPSET_ELEM_PERMANENT 0
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/* Set is defined with timeout support: timeout value may be 0 */
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#define IPSET_NO_TIMEOUT UINT_MAX
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/* Max timeout value, see msecs_to_jiffies() in jiffies.h */
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#define IPSET_MAX_TIMEOUT (UINT_MAX >> 1)/MSEC_PER_SEC
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#define ip_set_adt_opt_timeout(opt, set) \
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((opt)->ext.timeout != IPSET_NO_TIMEOUT ? (opt)->ext.timeout : (set)->timeout)
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static inline unsigned int
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ip_set_timeout_uget(struct nlattr *tb)
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{
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unsigned int timeout = ip_set_get_h32(tb);
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/* Normalize to fit into jiffies */
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if (timeout > IPSET_MAX_TIMEOUT)
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timeout = IPSET_MAX_TIMEOUT;
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return timeout;
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}
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static inline bool
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ip_set_timeout_expired(const unsigned long *t)
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{
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return *t != IPSET_ELEM_PERMANENT && time_is_before_jiffies(*t);
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}
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static inline void
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ip_set_timeout_set(unsigned long *timeout, u32 value)
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{
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unsigned long t;
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if (!value) {
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*timeout = IPSET_ELEM_PERMANENT;
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return;
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}
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t = msecs_to_jiffies(value * MSEC_PER_SEC) + jiffies;
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if (t == IPSET_ELEM_PERMANENT)
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/* Bingo! :-) */
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t--;
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*timeout = t;
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}
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static inline u32
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ip_set_timeout_get(const unsigned long *timeout)
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{
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u32 t;
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if (*timeout == IPSET_ELEM_PERMANENT)
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return 0;
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t = jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC;
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/* Zero value in userspace means no timeout */
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return t == 0 ? 1 : t;
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}
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#endif /* __KERNEL__ */
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#endif /* _IP_SET_TIMEOUT_H */
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