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14 * in the LICENSE file that accompanied this code).
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29 * This file is part of Lustre, http://www.lustre.org/
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32 * libcfs/include/libcfs/linux/linux-time.h
34 * Implementation of portable time API for Linux (kernel and user-level).
36 * Author: Nikita Danilov <nikita@clusterfs.com>
39 #ifndef __LIBCFS_LINUX_LINUX_TIME_H__
40 #define __LIBCFS_LINUX_LINUX_TIME_H__
42 #ifndef __LIBCFS_LIBCFS_H__
43 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
47 #error This include is only for kernel use.
50 /* Portable time API */
53 * Platform provides three opaque data-types:
55 * cfs_time_t represents point in time. This is internal kernel
56 * time rather than "wall clock". This time bears no
57 * relation to gettimeofday().
59 * cfs_duration_t represents time interval with resolution of internal
62 * cfs_time_t cfs_time_current(void);
63 * cfs_time_t cfs_time_add (cfs_time_t, cfs_duration_t);
64 * cfs_duration_t cfs_time_sub (cfs_time_t, cfs_time_t);
66 * time_t cfs_duration_sec (cfs_duration_t);
69 #include <linux/module.h>
70 #include <linux/kernel.h>
71 #include <linux/version.h>
72 #include <linux/jiffies.h>
73 #include <linux/types.h>
74 #include <linux/time.h>
75 #include <asm/div64.h>
78 * Generic kernel stuff
81 typedef unsigned long cfs_time_t; /* jiffies */
82 typedef long cfs_duration_t;
84 #ifndef HAVE_TIMESPEC64
86 typedef __s64 time64_t;
88 #if __BITS_PER_LONG == 64
90 # define timespec64 timespec
92 static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
97 static inline struct timespec timespec64_to_timespec(const struct timespec64 ts)
104 time64_t tv_sec; /* seconds */
105 long tv_nsec; /* nanoseconds */
108 static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
110 struct timespec64 ret;
112 ret.tv_sec = ts.tv_sec;
113 ret.tv_nsec = ts.tv_nsec;
117 static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64)
121 ret.tv_sec = (time_t)ts64.tv_sec;
122 ret.tv_nsec = ts64.tv_nsec;
125 #endif /* __BITS_PER_LONG != 64 */
127 #endif /* HAVE_TIMESPEC64 */
129 #ifndef HAVE_KTIME_ADD
130 # define ktime_add(lhs, rhs) ({ (ktime_t){ .tv64 = (lhs).tv64 + (rhs).tv64 }; })
131 #endif /* !HAVE_KTIME_ADD */
133 #ifndef HAVE_KTIME_AFTER
134 static inline bool ktime_after(const ktime_t cmp1, const ktime_t cmp2)
136 return cmp1.tv64 > cmp2.tv64;
138 #endif /* !HAVE_KTIME_AFTER */
140 #ifndef HAVE_KTIME_BEFORE
141 static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2)
143 return cmp1.tv64 < cmp2.tv64;
145 #endif /* !HAVE_KTIME_BEFORE */
147 #ifndef HAVE_KTIME_GET_TS64
148 void ktime_get_ts64(struct timespec64 *ts);
149 #endif /* HAVE_KTIME_GET_TS */
151 #ifndef HAVE_KTIME_GET_REAL_TS64
152 void ktime_get_real_ts64(struct timespec64 *ts);
153 #endif /* HAVE_KTIME_GET_REAL_TS */
155 #ifndef HAVE_KTIME_GET_REAL_SECONDS
156 time64_t ktime_get_real_seconds(void);
157 #endif /* HAVE_KTIME_GET_REAL_SECONDS */
159 #ifndef HAVE_KTIME_GET_SECONDS
160 time64_t ktime_get_seconds(void);
161 #endif /* HAVE_KTIME_GET_SECONDS */
163 #ifdef NEED_KTIME_GET_REAL_NS
164 static inline u64 ktime_get_real_ns(void)
166 return ktime_to_ns(ktime_get_real());
168 #endif /* NEED_KTIME_GET_REAL_NS */
170 #ifndef HAVE_KTIME_TO_TIMESPEC64
171 static inline struct timespec64 ktime_to_timespec64(ktime_t kt)
173 struct timespec ts = ns_to_timespec((kt).tv64);
175 return timespec_to_timespec64(ts);
177 #endif /* HAVE_KTIME_TO_TIMESPEC64 */
179 #ifndef HAVE_TIMESPEC64_SUB
180 static inline struct timespec64
181 timespec64_sub(struct timespec64 later, struct timespec64 earlier)
183 struct timespec diff;
185 diff = timespec_sub(timespec64_to_timespec(later),
186 timespec64_to_timespec(earlier));
187 return timespec_to_timespec64(diff);
191 #ifndef HAVE_TIMESPEC64_TO_KTIME
192 static inline ktime_t timespec64_to_ktime(struct timespec64 ts)
194 return ktime_set(ts.tv_sec, ts.tv_nsec);
198 static inline int cfs_time_before(cfs_time_t t1, cfs_time_t t2)
200 return time_before(t1, t2);
203 static inline int cfs_time_beforeq(cfs_time_t t1, cfs_time_t t2)
205 return time_before_eq(t1, t2);
208 static inline cfs_time_t cfs_time_current(void)
213 static inline time_t cfs_time_current_sec(void)
215 return get_seconds();
218 static inline cfs_duration_t cfs_time_seconds(int seconds)
220 return ((cfs_duration_t)seconds) * msecs_to_jiffies(MSEC_PER_SEC);
223 static inline time_t cfs_duration_sec(cfs_duration_t d)
225 return d / msecs_to_jiffies(MSEC_PER_SEC);
228 #define cfs_time_current_64 get_jiffies_64
230 static inline __u64 cfs_time_add_64(__u64 t, __u64 d)
235 static inline __u64 cfs_time_shift_64(int seconds)
237 return cfs_time_add_64(cfs_time_current_64(),
238 cfs_time_seconds(seconds));
241 static inline int cfs_time_before_64(__u64 t1, __u64 t2)
243 return (__s64)t2 - (__s64)t1 > 0;
246 static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
248 return (__s64)t2 - (__s64)t1 >= 0;
251 #endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */