/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2014, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * libcfs/include/libcfs/linux/linux-time.h * * Implementation of portable time API for Linux (kernel and user-level). * * Author: Nikita Danilov */ #ifndef __LIBCFS_LINUX_LINUX_TIME_H__ #define __LIBCFS_LINUX_LINUX_TIME_H__ /* Portable time API */ #include #include #include #include #include #include #include #include #include /* * Generic kernel stuff */ #ifndef HAVE_TIMESPEC64 typedef __s64 time64_t; #if __BITS_PER_LONG == 64 # define timespec64 timespec static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) { return ts; } static inline struct timespec timespec64_to_timespec(const struct timespec64 ts) { return ts; } #else struct timespec64 { time64_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds */ }; static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) { struct timespec64 ret; ret.tv_sec = ts.tv_sec; ret.tv_nsec = ts.tv_nsec; return ret; } static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) { struct timespec ret; ret.tv_sec = (time_t)ts64.tv_sec; ret.tv_nsec = ts64.tv_nsec; return ret; } #endif /* __BITS_PER_LONG != 64 */ #endif /* HAVE_TIMESPEC64 */ #ifndef HAVE_NS_TO_TIMESPEC64 static inline struct timespec64 ns_to_timespec64(const s64 nsec) { struct timespec64 ts; s32 rem; if (!nsec) return (struct timespec64) {0, 0}; ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem); if (unlikely(rem < 0)) { ts.tv_sec--; rem += NSEC_PER_SEC; } ts.tv_nsec = rem; return ts; } #endif #ifndef HAVE_KTIME_ADD # define ktime_add(lhs, rhs) ({ (ktime_t){ .tv64 = (lhs).tv64 + (rhs).tv64 }; }) #endif /* !HAVE_KTIME_ADD */ #ifndef HAVE_KTIME_AFTER static inline bool ktime_after(const ktime_t cmp1, const ktime_t cmp2) { return cmp1.tv64 > cmp2.tv64; } #endif /* !HAVE_KTIME_AFTER */ #ifndef HAVE_KTIME_BEFORE static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2) { return cmp1.tv64 < cmp2.tv64; } #endif /* !HAVE_KTIME_BEFORE */ #ifndef HAVE_KTIME_COMPARE static inline int ktime_compare(const ktime_t cmp1, const ktime_t cmp2) { if (cmp1.tv64 < cmp2.tv64) return -1; if (cmp1.tv64 > cmp2.tv64) return 1; return 0; } #endif /* !HAVE_KTIME_COMPARE */ #ifndef HAVE_KTIME_GET_TS64 void ktime_get_ts64(struct timespec64 *ts); #endif /* HAVE_KTIME_GET_TS */ #ifndef HAVE_KTIME_GET_REAL_TS64 void ktime_get_real_ts64(struct timespec64 *ts); #endif /* HAVE_KTIME_GET_REAL_TS */ #ifndef HAVE_KTIME_GET_REAL_SECONDS time64_t ktime_get_real_seconds(void); #endif /* HAVE_KTIME_GET_REAL_SECONDS */ #ifndef HAVE_KTIME_GET_SECONDS time64_t ktime_get_seconds(void); #endif /* HAVE_KTIME_GET_SECONDS */ #ifdef NEED_KTIME_GET_NS static inline u64 ktime_get_ns(void) { return ktime_to_ns(ktime_get()); } #endif /* NEED_KTIME_GET_NS */ #ifdef NEED_KTIME_GET_REAL_NS static inline u64 ktime_get_real_ns(void) { return ktime_to_ns(ktime_get_real()); } #endif /* NEED_KTIME_GET_REAL_NS */ #ifndef HAVE_KTIME_MS_DELTA static inline s64 ktime_ms_delta(const ktime_t later, const ktime_t earlier) { return ktime_to_ms(ktime_sub(later, earlier)); } #endif /* HAVE_KTIME_MS_DELTA */ #ifndef HAVE_KTIME_TO_TIMESPEC64 static inline struct timespec64 ktime_to_timespec64(ktime_t kt) { struct timespec ts = ns_to_timespec((kt).tv64); return timespec_to_timespec64(ts); } #endif /* HAVE_KTIME_TO_TIMESPEC64 */ #ifndef HAVE_TIMESPEC64_SUB static inline struct timespec64 timespec64_sub(struct timespec64 later, struct timespec64 earlier) { struct timespec diff; diff = timespec_sub(timespec64_to_timespec(later), timespec64_to_timespec(earlier)); return timespec_to_timespec64(diff); } #endif #ifndef HAVE_TIMESPEC64_TO_KTIME static inline ktime_t timespec64_to_ktime(struct timespec64 ts) { return ktime_set(ts.tv_sec, ts.tv_nsec); } #endif static inline unsigned long cfs_time_seconds(time64_t seconds) { return nsecs_to_jiffies64(seconds * NSEC_PER_SEC); } #ifdef HAVE_NEW_DEFINE_TIMER # ifndef TIMER_DATA_TYPE # define TIMER_DATA_TYPE struct timer_list * # endif #define CFS_DEFINE_TIMER(_name, _function, _expires, _data) \ DEFINE_TIMER((_name), (_function)) #else # ifndef TIMER_DATA_TYPE # define TIMER_DATA_TYPE unsigned long # endif #define CFS_DEFINE_TIMER(_name, _function, _expires, _data) \ DEFINE_TIMER((_name), (_function), (_expires), (_data)) #endif #ifdef HAVE_TIMER_SETUP #define cfs_timer_cb_arg_t struct timer_list * #define cfs_from_timer(var, callback_timer, timer_fieldname) \ from_timer(var, callback_timer, timer_fieldname) #define cfs_timer_setup(timer, callback, data, flags) \ timer_setup((timer), (callback), (flags)) #define cfs_timer_cb_arg(var, timer_fieldname) (&(var)->timer_fieldname) #else #define cfs_timer_cb_arg_t unsigned long #define cfs_from_timer(var, data, timer_fieldname) (typeof(var))(data) #define cfs_timer_setup(timer, callback, data, flags) \ setup_timer((timer), (callback), (data)) #define cfs_timer_cb_arg(var, timer_fieldname) (cfs_timer_cb_arg_t)(var) #endif #endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */