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5dbf2012 AB |
1 | #ifndef _LINUX_TIME32_H |
2 | #define _LINUX_TIME32_H | |
3 | /* | |
4 | * These are all interfaces based on the old time_t definition | |
5 | * that overflows in 2038 on 32-bit architectures. New code | |
6 | * should use the replacements based on time64_t and timespec64. | |
7 | * | |
8 | * Any interfaces in here that become unused as we migrate | |
9 | * code to time64_t should get removed. | |
10 | */ | |
11 | ||
12 | #include <linux/time64.h> | |
13 | ||
14 | #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) | |
15 | ||
abc8f96e AB |
16 | #if __BITS_PER_LONG == 64 |
17 | ||
18 | /* timespec64 is defined as timespec here */ | |
19 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) | |
20 | { | |
4f0fad9a | 21 | return *(const struct timespec *)&ts64; |
abc8f96e AB |
22 | } |
23 | ||
24 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) | |
25 | { | |
4f0fad9a | 26 | return *(const struct timespec64 *)&ts; |
abc8f96e AB |
27 | } |
28 | ||
abc8f96e AB |
29 | #else |
30 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) | |
31 | { | |
32 | struct timespec ret; | |
33 | ||
34 | ret.tv_sec = (time_t)ts64.tv_sec; | |
35 | ret.tv_nsec = ts64.tv_nsec; | |
36 | return ret; | |
37 | } | |
38 | ||
39 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) | |
40 | { | |
41 | struct timespec64 ret; | |
42 | ||
43 | ret.tv_sec = ts.tv_sec; | |
44 | ret.tv_nsec = ts.tv_nsec; | |
45 | return ret; | |
46 | } | |
4f0fad9a | 47 | #endif |
abc8f96e | 48 | |
5dbf2012 AB |
49 | static inline int timespec_equal(const struct timespec *a, |
50 | const struct timespec *b) | |
51 | { | |
52 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); | |
53 | } | |
54 | ||
55 | /* | |
56 | * lhs < rhs: return <0 | |
57 | * lhs == rhs: return 0 | |
58 | * lhs > rhs: return >0 | |
59 | */ | |
60 | static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs) | |
61 | { | |
62 | if (lhs->tv_sec < rhs->tv_sec) | |
63 | return -1; | |
64 | if (lhs->tv_sec > rhs->tv_sec) | |
65 | return 1; | |
66 | return lhs->tv_nsec - rhs->tv_nsec; | |
67 | } | |
68 | ||
69 | extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec); | |
70 | ||
71 | static inline struct timespec timespec_add(struct timespec lhs, | |
72 | struct timespec rhs) | |
73 | { | |
74 | struct timespec ts_delta; | |
75 | ||
76 | set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec, | |
77 | lhs.tv_nsec + rhs.tv_nsec); | |
78 | return ts_delta; | |
79 | } | |
80 | ||
81 | /* | |
82 | * sub = lhs - rhs, in normalized form | |
83 | */ | |
84 | static inline struct timespec timespec_sub(struct timespec lhs, | |
85 | struct timespec rhs) | |
86 | { | |
87 | struct timespec ts_delta; | |
88 | ||
89 | set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec, | |
90 | lhs.tv_nsec - rhs.tv_nsec); | |
91 | return ts_delta; | |
92 | } | |
93 | ||
94 | /* | |
95 | * Returns true if the timespec is norm, false if denorm: | |
96 | */ | |
97 | static inline bool timespec_valid(const struct timespec *ts) | |
98 | { | |
99 | /* Dates before 1970 are bogus */ | |
100 | if (ts->tv_sec < 0) | |
101 | return false; | |
102 | /* Can't have more nanoseconds then a second */ | |
103 | if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC) | |
104 | return false; | |
105 | return true; | |
106 | } | |
107 | ||
108 | static inline bool timespec_valid_strict(const struct timespec *ts) | |
109 | { | |
110 | if (!timespec_valid(ts)) | |
111 | return false; | |
112 | /* Disallow values that could overflow ktime_t */ | |
113 | if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX) | |
114 | return false; | |
115 | return true; | |
116 | } | |
117 | ||
118 | /** | |
119 | * timespec_to_ns - Convert timespec to nanoseconds | |
120 | * @ts: pointer to the timespec variable to be converted | |
121 | * | |
122 | * Returns the scalar nanosecond representation of the timespec | |
123 | * parameter. | |
124 | */ | |
125 | static inline s64 timespec_to_ns(const struct timespec *ts) | |
126 | { | |
127 | return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; | |
128 | } | |
129 | ||
130 | /** | |
131 | * ns_to_timespec - Convert nanoseconds to timespec | |
132 | * @nsec: the nanoseconds value to be converted | |
133 | * | |
134 | * Returns the timespec representation of the nsec parameter. | |
135 | */ | |
136 | extern struct timespec ns_to_timespec(const s64 nsec); | |
137 | ||
138 | /** | |
139 | * timespec_add_ns - Adds nanoseconds to a timespec | |
140 | * @a: pointer to timespec to be incremented | |
141 | * @ns: unsigned nanoseconds value to be added | |
142 | * | |
143 | * This must always be inlined because its used from the x86-64 vdso, | |
144 | * which cannot call other kernel functions. | |
145 | */ | |
146 | static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) | |
147 | { | |
148 | a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); | |
149 | a->tv_nsec = ns; | |
150 | } | |
151 | ||
152 | /** | |
153 | * time_to_tm - converts the calendar time to local broken-down time | |
154 | * | |
155 | * @totalsecs the number of seconds elapsed since 00:00:00 on January 1, 1970, | |
156 | * Coordinated Universal Time (UTC). | |
157 | * @offset offset seconds adding to totalsecs. | |
158 | * @result pointer to struct tm variable to receive broken-down time | |
159 | */ | |
160 | static inline void time_to_tm(time_t totalsecs, int offset, struct tm *result) | |
161 | { | |
162 | time64_to_tm(totalsecs, offset, result); | |
163 | } | |
164 | ||
165 | static inline unsigned long mktime(const unsigned int year, | |
166 | const unsigned int mon, const unsigned int day, | |
167 | const unsigned int hour, const unsigned int min, | |
168 | const unsigned int sec) | |
169 | { | |
170 | return mktime64(year, mon, day, hour, min, sec); | |
171 | } | |
172 | ||
173 | static inline bool timeval_valid(const struct timeval *tv) | |
174 | { | |
175 | /* Dates before 1970 are bogus */ | |
176 | if (tv->tv_sec < 0) | |
177 | return false; | |
178 | ||
179 | /* Can't have more microseconds then a second */ | |
180 | if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC) | |
181 | return false; | |
182 | ||
183 | return true; | |
184 | } | |
185 | ||
186 | extern struct timespec timespec_trunc(struct timespec t, unsigned int gran); | |
187 | ||
188 | /** | |
189 | * timeval_to_ns - Convert timeval to nanoseconds | |
190 | * @ts: pointer to the timeval variable to be converted | |
191 | * | |
192 | * Returns the scalar nanosecond representation of the timeval | |
193 | * parameter. | |
194 | */ | |
195 | static inline s64 timeval_to_ns(const struct timeval *tv) | |
196 | { | |
197 | return ((s64) tv->tv_sec * NSEC_PER_SEC) + | |
198 | tv->tv_usec * NSEC_PER_USEC; | |
199 | } | |
200 | ||
201 | /** | |
202 | * ns_to_timeval - Convert nanoseconds to timeval | |
203 | * @nsec: the nanoseconds value to be converted | |
204 | * | |
205 | * Returns the timeval representation of the nsec parameter. | |
206 | */ | |
207 | extern struct timeval ns_to_timeval(const s64 nsec); | |
a84d1169 | 208 | extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec); |
5dbf2012 AB |
209 | |
210 | #endif |