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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 | ||
9afc5eee AB |
16 | typedef s32 old_time32_t; |
17 | ||
18 | struct old_timespec32 { | |
19 | old_time32_t tv_sec; | |
20 | s32 tv_nsec; | |
21 | }; | |
22 | ||
23 | struct old_timeval32 { | |
24 | old_time32_t tv_sec; | |
25 | s32 tv_usec; | |
26 | }; | |
27 | ||
28 | struct old_itimerspec32 { | |
29 | struct old_timespec32 it_interval; | |
30 | struct old_timespec32 it_value; | |
31 | }; | |
32 | ||
4faea239 AB |
33 | struct old_utimbuf32 { |
34 | old_time32_t actime; | |
35 | old_time32_t modtime; | |
36 | }; | |
37 | ||
9afc5eee AB |
38 | extern int get_old_timespec32(struct timespec64 *, const void __user *); |
39 | extern int put_old_timespec32(const struct timespec64 *, void __user *); | |
40 | extern int get_old_itimerspec32(struct itimerspec64 *its, | |
41 | const struct old_itimerspec32 __user *uits); | |
42 | extern int put_old_itimerspec32(const struct itimerspec64 *its, | |
43 | struct old_itimerspec32 __user *uits); | |
44 | ||
45 | ||
abc8f96e AB |
46 | #if __BITS_PER_LONG == 64 |
47 | ||
48 | /* timespec64 is defined as timespec here */ | |
49 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) | |
50 | { | |
4f0fad9a | 51 | return *(const struct timespec *)&ts64; |
abc8f96e AB |
52 | } |
53 | ||
54 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) | |
55 | { | |
4f0fad9a | 56 | return *(const struct timespec64 *)&ts; |
abc8f96e AB |
57 | } |
58 | ||
abc8f96e AB |
59 | #else |
60 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) | |
61 | { | |
62 | struct timespec ret; | |
63 | ||
64 | ret.tv_sec = (time_t)ts64.tv_sec; | |
65 | ret.tv_nsec = ts64.tv_nsec; | |
66 | return ret; | |
67 | } | |
68 | ||
69 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) | |
70 | { | |
71 | struct timespec64 ret; | |
72 | ||
73 | ret.tv_sec = ts.tv_sec; | |
74 | ret.tv_nsec = ts.tv_nsec; | |
75 | return ret; | |
76 | } | |
4f0fad9a | 77 | #endif |
abc8f96e | 78 | |
5dbf2012 AB |
79 | static inline int timespec_equal(const struct timespec *a, |
80 | const struct timespec *b) | |
81 | { | |
82 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); | |
83 | } | |
84 | ||
85 | /* | |
86 | * lhs < rhs: return <0 | |
87 | * lhs == rhs: return 0 | |
88 | * lhs > rhs: return >0 | |
89 | */ | |
90 | static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs) | |
91 | { | |
92 | if (lhs->tv_sec < rhs->tv_sec) | |
93 | return -1; | |
94 | if (lhs->tv_sec > rhs->tv_sec) | |
95 | return 1; | |
96 | return lhs->tv_nsec - rhs->tv_nsec; | |
97 | } | |
98 | ||
5dbf2012 AB |
99 | /* |
100 | * Returns true if the timespec is norm, false if denorm: | |
101 | */ | |
102 | static inline bool timespec_valid(const struct timespec *ts) | |
103 | { | |
104 | /* Dates before 1970 are bogus */ | |
105 | if (ts->tv_sec < 0) | |
106 | return false; | |
107 | /* Can't have more nanoseconds then a second */ | |
108 | if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC) | |
109 | return false; | |
110 | return true; | |
111 | } | |
112 | ||
5dbf2012 AB |
113 | /** |
114 | * timespec_to_ns - Convert timespec to nanoseconds | |
115 | * @ts: pointer to the timespec variable to be converted | |
116 | * | |
117 | * Returns the scalar nanosecond representation of the timespec | |
118 | * parameter. | |
119 | */ | |
120 | static inline s64 timespec_to_ns(const struct timespec *ts) | |
121 | { | |
122 | return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; | |
123 | } | |
124 | ||
125 | /** | |
126 | * ns_to_timespec - Convert nanoseconds to timespec | |
127 | * @nsec: the nanoseconds value to be converted | |
128 | * | |
129 | * Returns the timespec representation of the nsec parameter. | |
130 | */ | |
131 | extern struct timespec ns_to_timespec(const s64 nsec); | |
132 | ||
133 | /** | |
134 | * timespec_add_ns - Adds nanoseconds to a timespec | |
135 | * @a: pointer to timespec to be incremented | |
136 | * @ns: unsigned nanoseconds value to be added | |
137 | * | |
138 | * This must always be inlined because its used from the x86-64 vdso, | |
139 | * which cannot call other kernel functions. | |
140 | */ | |
141 | static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) | |
142 | { | |
143 | a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); | |
144 | a->tv_nsec = ns; | |
145 | } | |
146 | ||
5dbf2012 AB |
147 | static inline unsigned long mktime(const unsigned int year, |
148 | const unsigned int mon, const unsigned int day, | |
149 | const unsigned int hour, const unsigned int min, | |
150 | const unsigned int sec) | |
151 | { | |
152 | return mktime64(year, mon, day, hour, min, sec); | |
153 | } | |
154 | ||
155 | static inline bool timeval_valid(const struct timeval *tv) | |
156 | { | |
157 | /* Dates before 1970 are bogus */ | |
158 | if (tv->tv_sec < 0) | |
159 | return false; | |
160 | ||
161 | /* Can't have more microseconds then a second */ | |
162 | if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC) | |
163 | return false; | |
164 | ||
165 | return true; | |
166 | } | |
167 | ||
5dbf2012 AB |
168 | /** |
169 | * timeval_to_ns - Convert timeval to nanoseconds | |
170 | * @ts: pointer to the timeval variable to be converted | |
171 | * | |
172 | * Returns the scalar nanosecond representation of the timeval | |
173 | * parameter. | |
174 | */ | |
175 | static inline s64 timeval_to_ns(const struct timeval *tv) | |
176 | { | |
177 | return ((s64) tv->tv_sec * NSEC_PER_SEC) + | |
178 | tv->tv_usec * NSEC_PER_USEC; | |
179 | } | |
180 | ||
181 | /** | |
182 | * ns_to_timeval - Convert nanoseconds to timeval | |
183 | * @nsec: the nanoseconds value to be converted | |
184 | * | |
185 | * Returns the timeval representation of the nsec parameter. | |
186 | */ | |
187 | extern struct timeval ns_to_timeval(const s64 nsec); | |
a84d1169 | 188 | extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec); |
5dbf2012 | 189 | |
fd991a23 | 190 | /* |
9afc5eee AB |
191 | * Old names for the 32-bit time_t interfaces, these will be removed |
192 | * when everything uses the new names. | |
fd991a23 | 193 | */ |
9afc5eee AB |
194 | #define compat_time_t old_time32_t |
195 | #define compat_timeval old_timeval32 | |
196 | #define compat_timespec old_timespec32 | |
197 | #define compat_itimerspec old_itimerspec32 | |
198 | #define ns_to_compat_timeval ns_to_old_timeval32 | |
199 | #define get_compat_itimerspec64 get_old_itimerspec32 | |
200 | #define put_compat_itimerspec64 put_old_itimerspec32 | |
201 | #define compat_get_timespec64 get_old_timespec32 | |
202 | #define compat_put_timespec64 put_old_timespec32 | |
fd991a23 | 203 | |
5dbf2012 | 204 | #endif |