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#include <linux/timex.h>
14
15#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
16
17typedef s32 old_time32_t;
18
19struct old_timespec32 {
20 old_time32_t tv_sec;
21 s32 tv_nsec;
22};
23
24struct old_timeval32 {
25 old_time32_t tv_sec;
26 s32 tv_usec;
27};
28
29struct old_itimerspec32 {
30 struct old_timespec32 it_interval;
31 struct old_timespec32 it_value;
32};
33
34struct old_utimbuf32 {
35 old_time32_t actime;
36 old_time32_t modtime;
37};
38
39struct 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
66extern int get_old_timespec32(struct timespec64 *, const void __user *);
67extern int put_old_timespec32(const struct timespec64 *, void __user *);
68extern int get_old_itimerspec32(struct itimerspec64 *its,
69 const struct old_itimerspec32 __user *uits);
70extern int put_old_itimerspec32(const struct itimerspec64 *its,
71 struct old_itimerspec32 __user *uits);
72struct __kernel_timex;
73int get_old_timex32(struct __kernel_timex *, const struct old_timex32 __user *);
74int put_old_timex32(struct old_timex32 __user *, const struct __kernel_timex *);
75
76#if __BITS_PER_LONG == 64
77
78/* timespec64 is defined as timespec here */
79static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64)
80{
81 return *(const struct timespec *)&ts64;
82}
83
84static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
85{
86 return *(const struct timespec64 *)&ts;
87}
88
89#else
90static 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
99static 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}
107#endif
108
109static 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 */
120static 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
129/*
130 * Returns true if the timespec is norm, false if denorm:
131 */
132static 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
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 */
150static 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 */
161extern 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 */
171static __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
177static 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
185static 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
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 */
205static 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 */
217extern struct timeval ns_to_timeval(const s64 nsec);
218extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec);
219
220/*
221 * Old names for the 32-bit time_t interfaces, these will be removed
222 * when everything uses the new names.
223 */
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
233
234#endif
235