1 #ifndef _IP_SET_TIMEOUT_H 2 #define _IP_SET_TIMEOUT_H 3 4 /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifdef __KERNEL__ 12 13 /* How often should the gc be run by default */ 14 #define IPSET_GC_TIME (3 * 60) 15 16 /* Timeout period depending on the timeout value of the given set */ 17 #define IPSET_GC_PERIOD(timeout) \ 18 ((timeout/3) ? min_t(u32, (timeout)/3, IPSET_GC_TIME) : 1) 19 20 /* Entry is set with no timeout value */ 21 #define IPSET_ELEM_PERMANENT 0 22 23 /* Set is defined with timeout support: timeout value may be 0 */ 24 #define IPSET_NO_TIMEOUT UINT_MAX 25 26 #define ip_set_adt_opt_timeout(opt, set) \ 27 ((opt)->ext.timeout != IPSET_NO_TIMEOUT ? (opt)->ext.timeout : (set)->timeout) 28 29 static inline unsigned int ip_set_timeout_uget(struct nlattr * tb)30ip_set_timeout_uget(struct nlattr *tb) 31 { 32 unsigned int timeout = ip_set_get_h32(tb); 33 34 /* Normalize to fit into jiffies */ 35 if (timeout > UINT_MAX/MSEC_PER_SEC) 36 timeout = UINT_MAX/MSEC_PER_SEC; 37 38 /* Userspace supplied TIMEOUT parameter: adjust crazy size */ 39 return timeout == IPSET_NO_TIMEOUT ? IPSET_NO_TIMEOUT - 1 : timeout; 40 } 41 42 static inline bool ip_set_timeout_expired(unsigned long * t)43ip_set_timeout_expired(unsigned long *t) 44 { 45 return *t != IPSET_ELEM_PERMANENT && time_is_before_jiffies(*t); 46 } 47 48 static inline void ip_set_timeout_set(unsigned long * timeout,u32 value)49ip_set_timeout_set(unsigned long *timeout, u32 value) 50 { 51 unsigned long t; 52 53 if (!value) { 54 *timeout = IPSET_ELEM_PERMANENT; 55 return; 56 } 57 58 t = msecs_to_jiffies(value * MSEC_PER_SEC) + jiffies; 59 if (t == IPSET_ELEM_PERMANENT) 60 /* Bingo! :-) */ 61 t--; 62 *timeout = t; 63 } 64 65 static inline u32 ip_set_timeout_get(unsigned long * timeout)66ip_set_timeout_get(unsigned long *timeout) 67 { 68 return *timeout == IPSET_ELEM_PERMANENT ? 0 : 69 jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC; 70 } 71 72 #endif /* __KERNEL__ */ 73 #endif /* _IP_SET_TIMEOUT_H */ 74