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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> | |
4d5f007e | 13 | #include <linux/timex.h> |
5dbf2012 AB |
14 | |
15 | #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) | |
16 | ||
9afc5eee AB |
17 | typedef s32 old_time32_t; |
18 | ||
19 | struct old_timespec32 { | |
20 | old_time32_t tv_sec; | |
21 | s32 tv_nsec; | |
22 | }; | |
23 | ||
24 | struct old_timeval32 { | |
25 | old_time32_t tv_sec; | |
26 | s32 tv_usec; | |
27 | }; | |
28 | ||
29 | struct old_itimerspec32 { | |
30 | struct old_timespec32 it_interval; | |
31 | struct old_timespec32 it_value; | |
32 | }; | |
33 | ||
4faea239 AB |
34 | struct old_utimbuf32 { |
35 | old_time32_t actime; | |
36 | old_time32_t modtime; | |
37 | }; | |
38 | ||
4d5f007e AB |
39 | struct old_timex32 { |
40 | u32 modes; | |
41 | s32 offset; | |
42 | s32 freq; | |
43 | s32 maxerror; | |
44 | s32 esterror; | |
45 | s32 status; | |
46 | s32 constant; | |
47 | s32 precision; | |
48 | s32 tolerance; | |
49 | struct old_timeval32 time; | |
50 | s32 tick; | |
51 | s32 ppsfreq; | |
52 | s32 jitter; | |
53 | s32 shift; | |
54 | s32 stabil; | |
55 | s32 jitcnt; | |
56 | s32 calcnt; | |
57 | s32 errcnt; | |
58 | s32 stbcnt; | |
59 | s32 tai; | |
60 | ||
61 | s32:32; s32:32; s32:32; s32:32; | |
62 | s32:32; s32:32; s32:32; s32:32; | |
63 | s32:32; s32:32; s32:32; | |
64 | }; | |
65 | ||
9afc5eee AB |
66 | extern int get_old_timespec32(struct timespec64 *, const void __user *); |
67 | extern int put_old_timespec32(const struct timespec64 *, void __user *); | |
68 | extern int get_old_itimerspec32(struct itimerspec64 *its, | |
69 | const struct old_itimerspec32 __user *uits); | |
70 | extern int put_old_itimerspec32(const struct itimerspec64 *its, | |
71 | struct old_itimerspec32 __user *uits); | |
ead25417 DD |
72 | struct __kernel_timex; |
73 | int get_old_timex32(struct __kernel_timex *, const struct old_timex32 __user *); | |
74 | int put_old_timex32(struct old_timex32 __user *, const struct __kernel_timex *); | |
9afc5eee | 75 | |
abc8f96e AB |
76 | #if __BITS_PER_LONG == 64 |
77 | ||
78 | /* timespec64 is defined as timespec here */ | |
79 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) | |
80 | { | |
4f0fad9a | 81 | return *(const struct timespec *)&ts64; |
abc8f96e AB |
82 | } |
83 | ||
84 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) | |
85 | { | |
4f0fad9a | 86 | return *(const struct timespec64 *)&ts; |
abc8f96e AB |
87 | } |
88 | ||
abc8f96e AB |
89 | #else |
90 | static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) | |
91 | { | |
92 | struct timespec ret; | |
93 | ||
94 | ret.tv_sec = (time_t)ts64.tv_sec; | |
95 | ret.tv_nsec = ts64.tv_nsec; | |
96 | return ret; | |
97 | } | |
98 | ||
99 | static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) | |
100 | { | |
101 | struct timespec64 ret; | |
102 | ||
103 | ret.tv_sec = ts.tv_sec; | |
104 | ret.tv_nsec = ts.tv_nsec; | |
105 | return ret; | |
106 | } | |
4f0fad9a | 107 | #endif |
abc8f96e | 108 | |
5dbf2012 AB |
109 | static inline int timespec_equal(const struct timespec *a, |
110 | const struct timespec *b) | |
111 | { | |
112 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); | |
113 | } | |
114 | ||
115 | /* | |
116 | * lhs < rhs: return <0 | |
117 | * lhs == rhs: return 0 | |
118 | * lhs > rhs: return >0 | |
119 | */ | |
120 | static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs) | |
121 | { | |
122 | if (lhs->tv_sec < rhs->tv_sec) | |
123 | return -1; | |
124 | if (lhs->tv_sec > rhs->tv_sec) | |
125 | return 1; | |
126 | return lhs->tv_nsec - rhs->tv_nsec; | |
127 | } | |
128 | ||
5dbf2012 AB |
129 | /* |
130 | * Returns true if the timespec is norm, false if denorm: | |
131 | */ | |
132 | static inline bool timespec_valid(const struct timespec *ts) | |
133 | { | |
134 | /* Dates before 1970 are bogus */ | |
135 | if (ts->tv_sec < 0) | |
136 | return false; | |
137 | /* Can't have more nanoseconds then a second */ | |
138 | if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC) | |
139 | return false; | |
140 | return true; | |
141 | } | |
142 | ||
5dbf2012 AB |
143 | /** |
144 | * timespec_to_ns - Convert timespec to nanoseconds | |
145 | * @ts: pointer to the timespec variable to be converted | |
146 | * | |
147 | * Returns the scalar nanosecond representation of the timespec | |
148 | * parameter. | |
149 | */ | |
150 | static inline s64 timespec_to_ns(const struct timespec *ts) | |
151 | { | |
152 | return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; | |
153 | } | |
154 | ||
155 | /** | |
156 | * ns_to_timespec - Convert nanoseconds to timespec | |
157 | * @nsec: the nanoseconds value to be converted | |
158 | * | |
159 | * Returns the timespec representation of the nsec parameter. | |
160 | */ | |
161 | extern struct timespec ns_to_timespec(const s64 nsec); | |
162 | ||
163 | /** | |
164 | * timespec_add_ns - Adds nanoseconds to a timespec | |
165 | * @a: pointer to timespec to be incremented | |
166 | * @ns: unsigned nanoseconds value to be added | |
167 | * | |
168 | * This must always be inlined because its used from the x86-64 vdso, | |
169 | * which cannot call other kernel functions. | |
170 | */ | |
171 | static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) | |
172 | { | |
173 | a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns); | |
174 | a->tv_nsec = ns; | |
175 | } | |
176 | ||
5dbf2012 AB |
177 | static inline unsigned long mktime(const unsigned int year, |
178 | const unsigned int mon, const unsigned int day, | |
179 | const unsigned int hour, const unsigned int min, | |
180 | const unsigned int sec) | |
181 | { | |
182 | return mktime64(year, mon, day, hour, min, sec); | |
183 | } | |
184 | ||
185 | static inline bool timeval_valid(const struct timeval *tv) | |
186 | { | |
187 | /* Dates before 1970 are bogus */ | |
188 | if (tv->tv_sec < 0) | |
189 | return false; | |
190 | ||
191 | /* Can't have more microseconds then a second */ | |
192 | if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC) | |
193 | return false; | |
194 | ||
195 | return true; | |
196 | } | |
197 | ||
5dbf2012 AB |
198 | /** |
199 | * timeval_to_ns - Convert timeval to nanoseconds | |
200 | * @ts: pointer to the timeval variable to be converted | |
201 | * | |
202 | * Returns the scalar nanosecond representation of the timeval | |
203 | * parameter. | |
204 | */ | |
205 | static inline s64 timeval_to_ns(const struct timeval *tv) | |
206 | { | |
207 | return ((s64) tv->tv_sec * NSEC_PER_SEC) + | |
208 | tv->tv_usec * NSEC_PER_USEC; | |
209 | } | |
210 | ||
211 | /** | |
212 | * ns_to_timeval - Convert nanoseconds to timeval | |
213 | * @nsec: the nanoseconds value to be converted | |
214 | * | |
215 | * Returns the timeval representation of the nsec parameter. | |
216 | */ | |
217 | extern struct timeval ns_to_timeval(const s64 nsec); | |
a84d1169 | 218 | extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec); |
5dbf2012 | 219 | |
fd991a23 | 220 | /* |
9afc5eee AB |
221 | * Old names for the 32-bit time_t interfaces, these will be removed |
222 | * when everything uses the new names. | |
fd991a23 | 223 | */ |
9afc5eee AB |
224 | #define compat_time_t old_time32_t |
225 | #define compat_timeval old_timeval32 | |
226 | #define compat_timespec old_timespec32 | |
227 | #define compat_itimerspec old_itimerspec32 | |
228 | #define ns_to_compat_timeval ns_to_old_timeval32 | |
229 | #define get_compat_itimerspec64 get_old_itimerspec32 | |
230 | #define put_compat_itimerspec64 put_old_itimerspec32 | |
231 | #define compat_get_timespec64 get_old_timespec32 | |
232 | #define compat_put_timespec64 put_old_timespec32 | |
fd991a23 | 233 | |
5dbf2012 | 234 | #endif |