projects / mirror_ubuntu-hirsute-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 72205fc6 JK |
2 | #ifndef _IP_SET_TIMEOUT_H |
| 3 | #define _IP_SET_TIMEOUT_H | |
| 4 | ||
| 075e64c0 | 5 | /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 72205fc6 JK |
6 | */ |
| 7 | ||
| 8 | #ifdef __KERNEL__ | |
| 9 | ||
| 10 | /* How often should the gc be run by default */ | |
| 11 | #define IPSET_GC_TIME (3 * 60) | |
| 12 | ||
| 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) | |
| 16 | ||
| 075e64c0 JK |
17 | /* Entry is set with no timeout value */ |
| 18 | #define IPSET_ELEM_PERMANENT 0 | |
| 72205fc6 | 19 | |
| 075e64c0 JK |
20 | /* Set is defined with timeout support: timeout value may be 0 */ |
| 21 | #define IPSET_NO_TIMEOUT UINT_MAX | |
| 72205fc6 | 22 | |
| 30a2e107 JK |
23 | /* Max timeout value, see msecs_to_jiffies() in jiffies.h */ |
| 24 | #define IPSET_MAX_TIMEOUT (UINT_MAX >> 1)/MSEC_PER_SEC | |
| 25 | ||
| ca134ce8 JK |
26 | #define ip_set_adt_opt_timeout(opt, set) \ |
| 27 | ((opt)->ext.timeout != IPSET_NO_TIMEOUT ? (opt)->ext.timeout : (set)->timeout) | |
| ac8cc925 | 28 | |
| 72205fc6 JK |
29 | static inline unsigned int |
| 30 | ip_set_timeout_uget(struct nlattr *tb) | |
| 31 | { | |
| 32 | unsigned int timeout = ip_set_get_h32(tb); | |
| 33 | ||
| 127f5591 | 34 | /* Normalize to fit into jiffies */ |
| 30a2e107 JK |
35 | if (timeout > IPSET_MAX_TIMEOUT) |
| 36 | timeout = IPSET_MAX_TIMEOUT; | |
| 127f5591 | 37 | |
| 30a2e107 | 38 | return timeout; |
| 72205fc6 JK |
39 | } |
| 40 | ||
| 72205fc6 | 41 | static inline bool |
| da9fbfa7 | 42 | ip_set_timeout_expired(const unsigned long *t) |
| 72205fc6 | 43 | { |
| b57b2d1f | 44 | return *t != IPSET_ELEM_PERMANENT && time_is_before_jiffies(*t); |
| 72205fc6 JK |
45 | } |
| 46 | ||
| 075e64c0 | 47 | static inline void |
| b57b2d1f | 48 | ip_set_timeout_set(unsigned long *timeout, u32 value) |
| 72205fc6 | 49 | { |
| b57b2d1f JK |
50 | unsigned long t; |
| 51 | ||
| 52 | if (!value) { | |
| 075e64c0 JK |
53 | *timeout = IPSET_ELEM_PERMANENT; |
| 54 | return; | |
| 55 | } | |
| 72205fc6 | 56 | |
| b57b2d1f JK |
57 | t = msecs_to_jiffies(value * MSEC_PER_SEC) + jiffies; |
| 58 | if (t == IPSET_ELEM_PERMANENT) | |
| 72205fc6 | 59 | /* Bingo! :-) */ |
| b57b2d1f JK |
60 | t--; |
| 61 | *timeout = t; | |
| 72205fc6 JK |
62 | } |
| 63 | ||
| 64 | static inline u32 | |
| da9fbfa7 | 65 | ip_set_timeout_get(const unsigned long *timeout) |
| 72205fc6 | 66 | { |
| bd975e69 JK |
67 | u32 t; |
| 68 | ||
| 69 | if (*timeout == IPSET_ELEM_PERMANENT) | |
| 70 | return 0; | |
| 71 | ||
| 72 | t = jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC; | |
| 73 | /* Zero value in userspace means no timeout */ | |
| 74 | return t == 0 ? 1 : t; | |
| 72205fc6 | 75 | } |
| 72205fc6 JK |
76 | |
| 77 | #endif /* __KERNEL__ */ | |
| 72205fc6 | 78 | #endif /* _IP_SET_TIMEOUT_H */ |