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 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 33 struct old_utimbuf32 { 34 old_time32_t actime; 35 old_time32_t modtime; 36 }; 37 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 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 { 51 return *(const struct timespec *)&ts64; 52 } 53 54 static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) 55 { 56 return *(const struct timespec64 *)&ts; 57 } 58 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 } 77 #endif 78 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 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 } 112 113 /** 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 } 146 147 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 } 167 168 /** 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); 188 extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec); 189 190 /* 191 * Old names for the 32-bit time_t interfaces, these will be removed 192 * when everything uses the new names. 193 */ 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 203 204 #endif 205