| #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_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) |
| { |
| return *timeout == IPSET_ELEM_PERMANENT ? 0 : |
| jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC; |
| } |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _IP_SET_TIMEOUT_H */ |