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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-15 21:53:35 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-15 21:53:35 -0400
commit420c1c572d4ceaa2f37b6311b7017ac6cf049fe2 (patch)
treedf04e6b4b756b7a46d9887462d54a3ad0e1f91d5 /kernel
parent9620639b7ea3843983f4ced8b4c81eb4d8974838 (diff)
parent6e6823d17b157f185be09f4c70181299f9273f0b (diff)
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (62 commits) posix-clocks: Check write permissions in posix syscalls hrtimer: Remove empty hrtimer_init_hres_timer() hrtimer: Update hrtimer->state documentation hrtimer: Update base[CLOCK_BOOTTIME].offset correctly timers: Export CLOCK_BOOTTIME via the posix timers interface timers: Add CLOCK_BOOTTIME hrtimer base time: Extend get_xtime_and_monotonic_offset() to also return sleep time: Introduce get_monotonic_boottime and ktime_get_boottime hrtimers: extend hrtimer base code to handle more then 2 clockids ntp: Remove redundant and incorrect parameter check mn10300: Switch do_timer() to xtimer_update() posix clocks: Introduce dynamic clocks posix-timers: Cleanup namespace posix-timers: Add support for fd based clocks x86: Add clock_adjtime for x86 posix-timers: Introduce a syscall for clock tuning. time: Splitout compat timex accessors ntp: Add ADJ_SETOFFSET mode bit time: Introduce timekeeping_inject_offset posix-timer: Update comment ... Fix up new system-call-related conflicts in arch/x86/ia32/ia32entry.S arch/x86/include/asm/unistd_32.h arch/x86/include/asm/unistd_64.h arch/x86/kernel/syscall_table_32.S (name_to_handle_at()/open_by_handle_at() vs clock_adjtime()), and some due to movement of get_jiffies_64() in: kernel/time.c
Diffstat (limited to 'kernel')
-rw-r--r--kernel/compat.c136
-rw-r--r--kernel/hrtimer.c84
-rw-r--r--kernel/posix-cpu-timers.c110
-rw-r--r--kernel/posix-timers.c342
-rw-r--r--kernel/time.c20
-rw-r--r--kernel/time/Makefile3
-rw-r--r--kernel/time/clockevents.c1
-rw-r--r--kernel/time/jiffies.c20
-rw-r--r--kernel/time/ntp.c13
-rw-r--r--kernel/time/posix-clock.c451
-rw-r--r--kernel/time/tick-broadcast.c1
-rw-r--r--kernel/time/tick-common.c1
-rw-r--r--kernel/time/tick-internal.h9
-rw-r--r--kernel/time/tick-oneshot.c1
-rw-r--r--kernel/time/tick-sched.c1
-rw-r--r--kernel/time/timekeeping.c141
-rw-r--r--kernel/timer.c13
17 files changed, 995 insertions, 352 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index c9e2ec0b34a8..38b1d2c1cbe8 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -52,6 +52,64 @@ static int compat_put_timeval(struct compat_timeval __user *o,
52 put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; 52 put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0;
53} 53}
54 54
55static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp)
56{
57 memset(txc, 0, sizeof(struct timex));
58
59 if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) ||
60 __get_user(txc->modes, &utp->modes) ||
61 __get_user(txc->offset, &utp->offset) ||
62 __get_user(txc->freq, &utp->freq) ||
63 __get_user(txc->maxerror, &utp->maxerror) ||
64 __get_user(txc->esterror, &utp->esterror) ||
65 __get_user(txc->status, &utp->status) ||
66 __get_user(txc->constant, &utp->constant) ||
67 __get_user(txc->precision, &utp->precision) ||
68 __get_user(txc->tolerance, &utp->tolerance) ||
69 __get_user(txc->time.tv_sec, &utp->time.tv_sec) ||
70 __get_user(txc->time.tv_usec, &utp->time.tv_usec) ||
71 __get_user(txc->tick, &utp->tick) ||
72 __get_user(txc->ppsfreq, &utp->ppsfreq) ||
73 __get_user(txc->jitter, &utp->jitter) ||
74 __get_user(txc->shift, &utp->shift) ||
75 __get_user(txc->stabil, &utp->stabil) ||
76 __get_user(txc->jitcnt, &utp->jitcnt) ||
77 __get_user(txc->calcnt, &utp->calcnt) ||
78 __get_user(txc->errcnt, &utp->errcnt) ||
79 __get_user(txc->stbcnt, &utp->stbcnt))
80 return -EFAULT;
81
82 return 0;
83}
84
85static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc)
86{
87 if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) ||
88 __put_user(txc->modes, &utp->modes) ||
89 __put_user(txc->offset, &utp->offset) ||
90 __put_user(txc->freq, &utp->freq) ||
91 __put_user(txc->maxerror, &utp->maxerror) ||
92 __put_user(txc->esterror, &utp->esterror) ||
93 __put_user(txc->status, &utp->status) ||
94 __put_user(txc->constant, &utp->constant) ||
95 __put_user(txc->precision, &utp->precision) ||
96 __put_user(txc->tolerance, &utp->tolerance) ||
97 __put_user(txc->time.tv_sec, &utp->time.tv_sec) ||
98 __put_user(txc->time.tv_usec, &utp->time.tv_usec) ||
99 __put_user(txc->tick, &utp->tick) ||
100 __put_user(txc->ppsfreq, &utp->ppsfreq) ||
101 __put_user(txc->jitter, &utp->jitter) ||
102 __put_user(txc->shift, &utp->shift) ||
103 __put_user(txc->stabil, &utp->stabil) ||
104 __put_user(txc->jitcnt, &utp->jitcnt) ||
105 __put_user(txc->calcnt, &utp->calcnt) ||
106 __put_user(txc->errcnt, &utp->errcnt) ||
107 __put_user(txc->stbcnt, &utp->stbcnt) ||
108 __put_user(txc->tai, &utp->tai))
109 return -EFAULT;
110 return 0;
111}
112
55asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, 113asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
56 struct timezone __user *tz) 114 struct timezone __user *tz)
57{ 115{
@@ -617,6 +675,29 @@ long compat_sys_clock_gettime(clockid_t which_clock,
617 return err; 675 return err;
618} 676}
619 677
678long compat_sys_clock_adjtime(clockid_t which_clock,
679 struct compat_timex __user *utp)
680{
681 struct timex txc;
682 mm_segment_t oldfs;
683 int err, ret;
684
685 err = compat_get_timex(&txc, utp);
686 if (err)
687 return err;
688
689 oldfs = get_fs();
690 set_fs(KERNEL_DS);
691 ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc);
692 set_fs(oldfs);
693
694 err = compat_put_timex(utp, &txc);
695 if (err)
696 return err;
697
698 return ret;
699}
700
620long compat_sys_clock_getres(clockid_t which_clock, 701long compat_sys_clock_getres(clockid_t which_clock,
621 struct compat_timespec __user *tp) 702 struct compat_timespec __user *tp)
622{ 703{
@@ -951,58 +1032,17 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat
951asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) 1032asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
952{ 1033{
953 struct timex txc; 1034 struct timex txc;
954 int ret; 1035 int err, ret;
955
956 memset(&txc, 0, sizeof(struct timex));
957 1036
958 if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || 1037 err = compat_get_timex(&txc, utp);
959 __get_user(txc.modes, &utp->modes) || 1038 if (err)
960 __get_user(txc.offset, &utp->offset) || 1039 return err;
961 __get_user(txc.freq, &utp->freq) ||
962 __get_user(txc.maxerror, &utp->maxerror) ||
963 __get_user(txc.esterror, &utp->esterror) ||
964 __get_user(txc.status, &utp->status) ||
965 __get_user(txc.constant, &utp->constant) ||
966 __get_user(txc.precision, &utp->precision) ||
967 __get_user(txc.tolerance, &utp->tolerance) ||
968 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
969 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
970 __get_user(txc.tick, &utp->tick) ||
971 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
972 __get_user(txc.jitter, &utp->jitter) ||
973 __get_user(txc.shift, &utp->shift) ||
974 __get_user(txc.stabil, &utp->stabil) ||
975 __get_user(txc.jitcnt, &utp->jitcnt) ||
976 __get_user(txc.calcnt, &utp->calcnt) ||
977 __get_user(txc.errcnt, &utp->errcnt) ||
978 __get_user(txc.stbcnt, &utp->stbcnt))
979 return -EFAULT;
980 1040
981 ret = do_adjtimex(&txc); 1041 ret = do_adjtimex(&txc);
982 1042
983 if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || 1043 err = compat_put_timex(utp, &txc);
984 __put_user(txc.modes, &utp->modes) || 1044 if (err)
985 __put_user(txc.offset, &utp->offset) || 1045 return err;
986 __put_user(txc.freq, &utp->freq) ||
987 __put_user(txc.maxerror, &utp->maxerror) ||
988 __put_user(txc.esterror, &utp->esterror) ||
989 __put_user(txc.status, &utp->status) ||
990 __put_user(txc.constant, &utp->constant) ||
991 __put_user(txc.precision, &utp->precision) ||
992 __put_user(txc.tolerance, &utp->tolerance) ||
993 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
994 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
995 __put_user(txc.tick, &utp->tick) ||
996 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
997 __put_user(txc.jitter, &utp->jitter) ||
998 __put_user(txc.shift, &utp->shift) ||
999 __put_user(txc.stabil, &utp->stabil) ||
1000 __put_user(txc.jitcnt, &utp->jitcnt) ||
1001 __put_user(txc.calcnt, &utp->calcnt) ||
1002 __put_user(txc.errcnt, &utp->errcnt) ||
1003 __put_user(txc.stbcnt, &utp->stbcnt) ||
1004 __put_user(txc.tai, &utp->tai))
1005 ret = -EFAULT;
1006 1046
1007 return ret; 1047 return ret;
1008} 1048}
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index e38f5a073d01..9017478c5d4c 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -53,11 +53,10 @@
53/* 53/*
54 * The timer bases: 54 * The timer bases:
55 * 55 *
56 * Note: If we want to add new timer bases, we have to skip the two 56 * There are more clockids then hrtimer bases. Thus, we index
57 * clock ids captured by the cpu-timers. We do this by holding empty 57 * into the timer bases by the hrtimer_base_type enum. When trying
58 * entries rather than doing math adjustment of the clock ids. 58 * to reach a base using a clockid, hrtimer_clockid_to_base()
59 * This ensures that we capture erroneous accesses to these clock ids 59 * is used to convert from clockid to the proper hrtimer_base_type.
60 * rather than moving them into the range of valid clock id's.
61 */ 60 */
62DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) = 61DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) =
63{ 62{
@@ -74,30 +73,39 @@ DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) =
74 .get_time = &ktime_get, 73 .get_time = &ktime_get,
75 .resolution = KTIME_LOW_RES, 74 .resolution = KTIME_LOW_RES,
76 }, 75 },
76 {
77 .index = CLOCK_BOOTTIME,
78 .get_time = &ktime_get_boottime,
79 .resolution = KTIME_LOW_RES,
80 },
77 } 81 }
78}; 82};
79 83
84static int hrtimer_clock_to_base_table[MAX_CLOCKS];
85
86static inline int hrtimer_clockid_to_base(clockid_t clock_id)
87{
88 return hrtimer_clock_to_base_table[clock_id];
89}
90
91
80/* 92/*
81 * Get the coarse grained time at the softirq based on xtime and 93 * Get the coarse grained time at the softirq based on xtime and
82 * wall_to_monotonic. 94 * wall_to_monotonic.
83 */ 95 */
84static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base) 96static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base)
85{ 97{
86 ktime_t xtim, tomono; 98 ktime_t xtim, mono, boot;
87 struct timespec xts, tom; 99 struct timespec xts, tom, slp;
88 unsigned long seq;
89 100
90 do { 101 get_xtime_and_monotonic_and_sleep_offset(&xts, &tom, &slp);
91 seq = read_seqbegin(&xtime_lock);
92 xts = __current_kernel_time();
93 tom = __get_wall_to_monotonic();
94 } while (read_seqretry(&xtime_lock, seq));
95 102
96 xtim = timespec_to_ktime(xts); 103 xtim = timespec_to_ktime(xts);
97 tomono = timespec_to_ktime(tom); 104 mono = ktime_add(xtim, timespec_to_ktime(tom));
98 base->clock_base[CLOCK_REALTIME].softirq_time = xtim; 105 boot = ktime_add(mono, timespec_to_ktime(slp));
99 base->clock_base[CLOCK_MONOTONIC].softirq_time = 106 base->clock_base[HRTIMER_BASE_REALTIME].softirq_time = xtim;
100 ktime_add(xtim, tomono); 107 base->clock_base[HRTIMER_BASE_MONOTONIC].softirq_time = mono;
108 base->clock_base[HRTIMER_BASE_BOOTTIME].softirq_time = boot;
101} 109}
102 110
103/* 111/*
@@ -184,10 +192,11 @@ switch_hrtimer_base(struct hrtimer *timer, struct hrtimer_clock_base *base,
184 struct hrtimer_cpu_base *new_cpu_base; 192 struct hrtimer_cpu_base *new_cpu_base;
185 int this_cpu = smp_processor_id(); 193 int this_cpu = smp_processor_id();
186 int cpu = hrtimer_get_target(this_cpu, pinned); 194 int cpu = hrtimer_get_target(this_cpu, pinned);
195 int basenum = hrtimer_clockid_to_base(base->index);
187 196
188again: 197again:
189 new_cpu_base = &per_cpu(hrtimer_bases, cpu); 198 new_cpu_base = &per_cpu(hrtimer_bases, cpu);
190 new_base = &new_cpu_base->clock_base[base->index]; 199 new_base = &new_cpu_base->clock_base[basenum];
191 200
192 if (base != new_base) { 201 if (base != new_base) {
193 /* 202 /*
@@ -617,24 +626,23 @@ static int hrtimer_reprogram(struct hrtimer *timer,
617static void retrigger_next_event(void *arg) 626static void retrigger_next_event(void *arg)
618{ 627{
619 struct hrtimer_cpu_base *base; 628 struct hrtimer_cpu_base *base;
620 struct timespec realtime_offset, wtm; 629 struct timespec realtime_offset, wtm, sleep;
621 unsigned long seq;
622 630
623 if (!hrtimer_hres_active()) 631 if (!hrtimer_hres_active())
624 return; 632 return;
625 633
626 do { 634 get_xtime_and_monotonic_and_sleep_offset(&realtime_offset, &wtm,
627 seq = read_seqbegin(&xtime_lock); 635 &sleep);
628 wtm = __get_wall_to_monotonic();
629 } while (read_seqretry(&xtime_lock, seq));
630 set_normalized_timespec(&realtime_offset, -wtm.tv_sec, -wtm.tv_nsec); 636 set_normalized_timespec(&realtime_offset, -wtm.tv_sec, -wtm.tv_nsec);
631 637
632 base = &__get_cpu_var(hrtimer_bases); 638 base = &__get_cpu_var(hrtimer_bases);
633 639
634 /* Adjust CLOCK_REALTIME offset */ 640 /* Adjust CLOCK_REALTIME offset */
635 raw_spin_lock(&base->lock); 641 raw_spin_lock(&base->lock);
636 base->clock_base[CLOCK_REALTIME].offset = 642 base->clock_base[HRTIMER_BASE_REALTIME].offset =
637 timespec_to_ktime(realtime_offset); 643 timespec_to_ktime(realtime_offset);
644 base->clock_base[HRTIMER_BASE_BOOTTIME].offset =
645 timespec_to_ktime(sleep);
638 646
639 hrtimer_force_reprogram(base, 0); 647 hrtimer_force_reprogram(base, 0);
640 raw_spin_unlock(&base->lock); 648 raw_spin_unlock(&base->lock);
@@ -679,14 +687,6 @@ static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base)
679} 687}
680 688
681/* 689/*
682 * Initialize the high resolution related parts of a hrtimer
683 */
684static inline void hrtimer_init_timer_hres(struct hrtimer *timer)
685{
686}
687
688
689/*
690 * When High resolution timers are active, try to reprogram. Note, that in case 690 * When High resolution timers are active, try to reprogram. Note, that in case
691 * the state has HRTIMER_STATE_CALLBACK set, no reprogramming and no expiry 691 * the state has HRTIMER_STATE_CALLBACK set, no reprogramming and no expiry
692 * check happens. The timer gets enqueued into the rbtree. The reprogramming 692 * check happens. The timer gets enqueued into the rbtree. The reprogramming
@@ -731,8 +731,9 @@ static int hrtimer_switch_to_hres(void)
731 return 0; 731 return 0;
732 } 732 }
733 base->hres_active = 1; 733 base->hres_active = 1;
734 base->clock_base[CLOCK_REALTIME].resolution = KTIME_HIGH_RES; 734 base->clock_base[HRTIMER_BASE_REALTIME].resolution = KTIME_HIGH_RES;
735 base->clock_base[CLOCK_MONOTONIC].resolution = KTIME_HIGH_RES; 735 base->clock_base[HRTIMER_BASE_MONOTONIC].resolution = KTIME_HIGH_RES;
736 base->clock_base[HRTIMER_BASE_BOOTTIME].resolution = KTIME_HIGH_RES;
736 737
737 tick_setup_sched_timer(); 738 tick_setup_sched_timer();
738 739
@@ -756,7 +757,6 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
756 return 0; 757 return 0;
757} 758}
758static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { } 759static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { }
759static inline void hrtimer_init_timer_hres(struct hrtimer *timer) { }
760 760
761#endif /* CONFIG_HIGH_RES_TIMERS */ 761#endif /* CONFIG_HIGH_RES_TIMERS */
762 762
@@ -1127,6 +1127,7 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
1127 enum hrtimer_mode mode) 1127 enum hrtimer_mode mode)
1128{ 1128{
1129 struct hrtimer_cpu_base *cpu_base; 1129 struct hrtimer_cpu_base *cpu_base;
1130 int base;
1130 1131
1131 memset(timer, 0, sizeof(struct hrtimer)); 1132 memset(timer, 0, sizeof(struct hrtimer));
1132 1133
@@ -1135,8 +1136,8 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
1135 if (clock_id == CLOCK_REALTIME && mode != HRTIMER_MODE_ABS) 1136 if (clock_id == CLOCK_REALTIME && mode != HRTIMER_MODE_ABS)
1136 clock_id = CLOCK_MONOTONIC; 1137 clock_id = CLOCK_MONOTONIC;
1137 1138
1138 timer->base = &cpu_base->clock_base[clock_id]; 1139 base = hrtimer_clockid_to_base(clock_id);
1139 hrtimer_init_timer_hres(timer); 1140 timer->base = &cpu_base->clock_base[base];
1140 timerqueue_init(&timer->node); 1141 timerqueue_init(&timer->node);
1141 1142
1142#ifdef CONFIG_TIMER_STATS 1143#ifdef CONFIG_TIMER_STATS
@@ -1171,9 +1172,10 @@ EXPORT_SYMBOL_GPL(hrtimer_init);
1171int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp) 1172int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp)
1172{ 1173{
1173 struct hrtimer_cpu_base *cpu_base; 1174 struct hrtimer_cpu_base *cpu_base;
1175 int base = hrtimer_clockid_to_base(which_clock);
1174 1176
1175 cpu_base = &__raw_get_cpu_var(hrtimer_bases); 1177 cpu_base = &__raw_get_cpu_var(hrtimer_bases);
1176 *tp = ktime_to_timespec(cpu_base->clock_base[which_clock].resolution); 1178 *tp = ktime_to_timespec(cpu_base->clock_base[base].resolution);
1177 1179
1178 return 0; 1180 return 0;
1179} 1181}
@@ -1720,6 +1722,10 @@ static struct notifier_block __cpuinitdata hrtimers_nb = {
1720 1722
1721void __init hrtimers_init(void) 1723void __init hrtimers_init(void)
1722{ 1724{
1725 hrtimer_clock_to_base_table[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME;
1726 hrtimer_clock_to_base_table[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC;
1727 hrtimer_clock_to_base_table[CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME;
1728
1723 hrtimer_cpu_notify(&hrtimers_nb, (unsigned long)CPU_UP_PREPARE, 1729 hrtimer_cpu_notify(&hrtimers_nb, (unsigned long)CPU_UP_PREPARE,
1724 (void *)(long)smp_processor_id()); 1730 (void *)(long)smp_processor_id());
1725 register_cpu_notifier(&hrtimers_nb); 1731 register_cpu_notifier(&hrtimers_nb);
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 05bb7173850e..67fea9d25d55 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -176,7 +176,8 @@ static inline cputime_t virt_ticks(struct task_struct *p)
176 return p->utime; 176 return p->utime;
177} 177}
178 178
179int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp) 179static int
180posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp)
180{ 181{
181 int error = check_clock(which_clock); 182 int error = check_clock(which_clock);
182 if (!error) { 183 if (!error) {
@@ -194,7 +195,8 @@ int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp)
194 return error; 195 return error;
195} 196}
196 197
197int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp) 198static int
199posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp)
198{ 200{
199 /* 201 /*
200 * You can never reset a CPU clock, but we check for other errors 202 * You can never reset a CPU clock, but we check for other errors
@@ -317,7 +319,7 @@ static int cpu_clock_sample_group(const clockid_t which_clock,
317} 319}
318 320
319 321
320int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp) 322static int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp)
321{ 323{
322 const pid_t pid = CPUCLOCK_PID(which_clock); 324 const pid_t pid = CPUCLOCK_PID(which_clock);
323 int error = -EINVAL; 325 int error = -EINVAL;
@@ -379,7 +381,7 @@ int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp)
379 * This is called from sys_timer_create() and do_cpu_nanosleep() with the 381 * This is called from sys_timer_create() and do_cpu_nanosleep() with the
380 * new timer already all-zeros initialized. 382 * new timer already all-zeros initialized.
381 */ 383 */
382int posix_cpu_timer_create(struct k_itimer *new_timer) 384static int posix_cpu_timer_create(struct k_itimer *new_timer)
383{ 385{
384 int ret = 0; 386 int ret = 0;
385 const pid_t pid = CPUCLOCK_PID(new_timer->it_clock); 387 const pid_t pid = CPUCLOCK_PID(new_timer->it_clock);
@@ -425,7 +427,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer)
425 * If we return TIMER_RETRY, it's necessary to release the timer's lock 427 * If we return TIMER_RETRY, it's necessary to release the timer's lock
426 * and try again. (This happens when the timer is in the middle of firing.) 428 * and try again. (This happens when the timer is in the middle of firing.)
427 */ 429 */
428int posix_cpu_timer_del(struct k_itimer *timer) 430static int posix_cpu_timer_del(struct k_itimer *timer)
429{ 431{
430 struct task_struct *p = timer->it.cpu.task; 432 struct task_struct *p = timer->it.cpu.task;
431 int ret = 0; 433 int ret = 0;
@@ -665,8 +667,8 @@ static int cpu_timer_sample_group(const clockid_t which_clock,
665 * If we return TIMER_RETRY, it's necessary to release the timer's lock 667 * If we return TIMER_RETRY, it's necessary to release the timer's lock
666 * and try again. (This happens when the timer is in the middle of firing.) 668 * and try again. (This happens when the timer is in the middle of firing.)
667 */ 669 */
668int posix_cpu_timer_set(struct k_itimer *timer, int flags, 670static int posix_cpu_timer_set(struct k_itimer *timer, int flags,
669 struct itimerspec *new, struct itimerspec *old) 671 struct itimerspec *new, struct itimerspec *old)
670{ 672{
671 struct task_struct *p = timer->it.cpu.task; 673 struct task_struct *p = timer->it.cpu.task;
672 union cpu_time_count old_expires, new_expires, old_incr, val; 674 union cpu_time_count old_expires, new_expires, old_incr, val;
@@ -820,7 +822,7 @@ int posix_cpu_timer_set(struct k_itimer *timer, int flags,
820 return ret; 822 return ret;
821} 823}
822 824
823void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) 825static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp)
824{ 826{
825 union cpu_time_count now; 827 union cpu_time_count now;
826 struct task_struct *p = timer->it.cpu.task; 828 struct task_struct *p = timer->it.cpu.task;
@@ -1481,11 +1483,13 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags,
1481 return error; 1483 return error;
1482} 1484}
1483 1485
1484int posix_cpu_nsleep(const clockid_t which_clock, int flags, 1486static long posix_cpu_nsleep_restart(struct restart_block *restart_block);
1485 struct timespec *rqtp, struct timespec __user *rmtp) 1487
1488static int posix_cpu_nsleep(const clockid_t which_clock, int flags,
1489 struct timespec *rqtp, struct timespec __user *rmtp)
1486{ 1490{
1487 struct restart_block *restart_block = 1491 struct restart_block *restart_block =
1488 &current_thread_info()->restart_block; 1492 &current_thread_info()->restart_block;
1489 struct itimerspec it; 1493 struct itimerspec it;
1490 int error; 1494 int error;
1491 1495
@@ -1501,56 +1505,47 @@ int posix_cpu_nsleep(const clockid_t which_clock, int flags,
1501 1505
1502 if (error == -ERESTART_RESTARTBLOCK) { 1506 if (error == -ERESTART_RESTARTBLOCK) {
1503 1507
1504 if (flags & TIMER_ABSTIME) 1508 if (flags & TIMER_ABSTIME)
1505 return -ERESTARTNOHAND; 1509 return -ERESTARTNOHAND;
1506 /* 1510 /*
1507 * Report back to the user the time still remaining. 1511 * Report back to the user the time still remaining.
1508 */ 1512 */
1509 if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp)) 1513 if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
1510 return -EFAULT; 1514 return -EFAULT;
1511 1515
1512 restart_block->fn = posix_cpu_nsleep_restart; 1516 restart_block->fn = posix_cpu_nsleep_restart;
1513 restart_block->arg0 = which_clock; 1517 restart_block->nanosleep.index = which_clock;
1514 restart_block->arg1 = (unsigned long) rmtp; 1518 restart_block->nanosleep.rmtp = rmtp;
1515 restart_block->arg2 = rqtp->tv_sec; 1519 restart_block->nanosleep.expires = timespec_to_ns(rqtp);
1516 restart_block->arg3 = rqtp->tv_nsec;
1517 } 1520 }
1518 return error; 1521 return error;
1519} 1522}
1520 1523
1521long posix_cpu_nsleep_restart(struct restart_block *restart_block) 1524static long posix_cpu_nsleep_restart(struct restart_block *restart_block)
1522{ 1525{
1523 clockid_t which_clock = restart_block->arg0; 1526 clockid_t which_clock = restart_block->nanosleep.index;
1524 struct timespec __user *rmtp;
1525 struct timespec t; 1527 struct timespec t;
1526 struct itimerspec it; 1528 struct itimerspec it;
1527 int error; 1529 int error;
1528 1530
1529 rmtp = (struct timespec __user *) restart_block->arg1; 1531 t = ns_to_timespec(restart_block->nanosleep.expires);
1530 t.tv_sec = restart_block->arg2;
1531 t.tv_nsec = restart_block->arg3;
1532 1532
1533 restart_block->fn = do_no_restart_syscall;
1534 error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it); 1533 error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it);
1535 1534
1536 if (error == -ERESTART_RESTARTBLOCK) { 1535 if (error == -ERESTART_RESTARTBLOCK) {
1536 struct timespec __user *rmtp = restart_block->nanosleep.rmtp;
1537 /* 1537 /*
1538 * Report back to the user the time still remaining. 1538 * Report back to the user the time still remaining.
1539 */ 1539 */
1540 if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp)) 1540 if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
1541 return -EFAULT; 1541 return -EFAULT;
1542 1542
1543 restart_block->fn = posix_cpu_nsleep_restart; 1543 restart_block->nanosleep.expires = timespec_to_ns(&t);
1544 restart_block->arg0 = which_clock;
1545 restart_block->arg1 = (unsigned long) rmtp;
1546 restart_block->arg2 = t.tv_sec;
1547 restart_block->arg3 = t.tv_nsec;
1548 } 1544 }
1549 return error; 1545 return error;
1550 1546
1551} 1547}
1552 1548
1553
1554#define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED) 1549#define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED)
1555#define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED) 1550#define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED)
1556 1551
@@ -1594,38 +1589,37 @@ static int thread_cpu_timer_create(struct k_itimer *timer)
1594 timer->it_clock = THREAD_CLOCK; 1589 timer->it_clock = THREAD_CLOCK;
1595 return posix_cpu_timer_create(timer); 1590 return posix_cpu_timer_create(timer);
1596} 1591}
1597static int thread_cpu_nsleep(const clockid_t which_clock, int flags, 1592
1598 struct timespec *rqtp, struct timespec __user *rmtp) 1593struct k_clock clock_posix_cpu = {
1599{ 1594 .clock_getres = posix_cpu_clock_getres,
1600 return -EINVAL; 1595 .clock_set = posix_cpu_clock_set,
1601} 1596 .clock_get = posix_cpu_clock_get,
1602static long thread_cpu_nsleep_restart(struct restart_block *restart_block) 1597 .timer_create = posix_cpu_timer_create,
1603{ 1598 .nsleep = posix_cpu_nsleep,
1604 return -EINVAL; 1599 .nsleep_restart = posix_cpu_nsleep_restart,
1605} 1600 .timer_set = posix_cpu_timer_set,
1601 .timer_del = posix_cpu_timer_del,
1602 .timer_get = posix_cpu_timer_get,
1603};
1606 1604
1607static __init int init_posix_cpu_timers(void) 1605static __init int init_posix_cpu_timers(void)
1608{ 1606{
1609 struct k_clock process = { 1607 struct k_clock process = {
1610 .clock_getres = process_cpu_clock_getres, 1608 .clock_getres = process_cpu_clock_getres,
1611 .clock_get = process_cpu_clock_get, 1609 .clock_get = process_cpu_clock_get,
1612 .clock_set = do_posix_clock_nosettime, 1610 .timer_create = process_cpu_timer_create,
1613 .timer_create = process_cpu_timer_create, 1611 .nsleep = process_cpu_nsleep,
1614 .nsleep = process_cpu_nsleep, 1612 .nsleep_restart = process_cpu_nsleep_restart,
1615 .nsleep_restart = process_cpu_nsleep_restart,
1616 }; 1613 };
1617 struct k_clock thread = { 1614 struct k_clock thread = {
1618 .clock_getres = thread_cpu_clock_getres, 1615 .clock_getres = thread_cpu_clock_getres,
1619 .clock_get = thread_cpu_clock_get, 1616 .clock_get = thread_cpu_clock_get,
1620 .clock_set = do_posix_clock_nosettime, 1617 .timer_create = thread_cpu_timer_create,
1621 .timer_create = thread_cpu_timer_create,
1622 .nsleep = thread_cpu_nsleep,
1623 .nsleep_restart = thread_cpu_nsleep_restart,
1624 }; 1618 };
1625 struct timespec ts; 1619 struct timespec ts;
1626 1620
1627 register_posix_clock(CLOCK_PROCESS_CPUTIME_ID, &process); 1621 posix_timers_register_clock(CLOCK_PROCESS_CPUTIME_ID, &process);
1628 register_posix_clock(CLOCK_THREAD_CPUTIME_ID, &thread); 1622 posix_timers_register_clock(CLOCK_THREAD_CPUTIME_ID, &thread);
1629 1623
1630 cputime_to_timespec(cputime_one_jiffy, &ts); 1624 cputime_to_timespec(cputime_one_jiffy, &ts);
1631 onecputick = ts.tv_nsec; 1625 onecputick = ts.tv_nsec;
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 93bd2eb2bc53..4c0124919f9a 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -41,6 +41,7 @@
41#include <linux/init.h> 41#include <linux/init.h>
42#include <linux/compiler.h> 42#include <linux/compiler.h>
43#include <linux/idr.h> 43#include <linux/idr.h>
44#include <linux/posix-clock.h>
44#include <linux/posix-timers.h> 45#include <linux/posix-timers.h>
45#include <linux/syscalls.h> 46#include <linux/syscalls.h>
46#include <linux/wait.h> 47#include <linux/wait.h>
@@ -81,6 +82,14 @@ static DEFINE_SPINLOCK(idr_lock);
81#error "SIGEV_THREAD_ID must not share bit with other SIGEV values!" 82#error "SIGEV_THREAD_ID must not share bit with other SIGEV values!"
82#endif 83#endif
83 84
85/*
86 * parisc wants ENOTSUP instead of EOPNOTSUPP
87 */
88#ifndef ENOTSUP
89# define ENANOSLEEP_NOTSUP EOPNOTSUPP
90#else
91# define ENANOSLEEP_NOTSUP ENOTSUP
92#endif
84 93
85/* 94/*
86 * The timer ID is turned into a timer address by idr_find(). 95 * The timer ID is turned into a timer address by idr_find().
@@ -94,11 +103,7 @@ static DEFINE_SPINLOCK(idr_lock);
94/* 103/*
95 * CLOCKs: The POSIX standard calls for a couple of clocks and allows us 104 * CLOCKs: The POSIX standard calls for a couple of clocks and allows us
96 * to implement others. This structure defines the various 105 * to implement others. This structure defines the various
97 * clocks and allows the possibility of adding others. We 106 * clocks.
98 * provide an interface to add clocks to the table and expect
99 * the "arch" code to add at least one clock that is high
100 * resolution. Here we define the standard CLOCK_REALTIME as a
101 * 1/HZ resolution clock.
102 * 107 *
103 * RESOLUTION: Clock resolution is used to round up timer and interval 108 * RESOLUTION: Clock resolution is used to round up timer and interval
104 * times, NOT to report clock times, which are reported with as 109 * times, NOT to report clock times, which are reported with as
@@ -108,20 +113,13 @@ static DEFINE_SPINLOCK(idr_lock);
108 * necessary code is written. The standard says we should say 113 * necessary code is written. The standard says we should say
109 * something about this issue in the documentation... 114 * something about this issue in the documentation...
110 * 115 *
111 * FUNCTIONS: The CLOCKs structure defines possible functions to handle 116 * FUNCTIONS: The CLOCKs structure defines possible functions to
112 * various clock functions. For clocks that use the standard 117 * handle various clock functions.
113 * system timer code these entries should be NULL. This will
114 * allow dispatch without the overhead of indirect function
115 * calls. CLOCKS that depend on other sources (e.g. WWV or GPS)
116 * must supply functions here, even if the function just returns
117 * ENOSYS. The standard POSIX timer management code assumes the
118 * following: 1.) The k_itimer struct (sched.h) is used for the
119 * timer. 2.) The list, it_lock, it_clock, it_id and it_pid
120 * fields are not modified by timer code.
121 * 118 *
122 * At this time all functions EXCEPT clock_nanosleep can be 119 * The standard POSIX timer management code assumes the
123 * redirected by the CLOCKS structure. Clock_nanosleep is in 120 * following: 1.) The k_itimer struct (sched.h) is used for
124 * there, but the code ignores it. 121 * the timer. 2.) The list, it_lock, it_clock, it_id and
122 * it_pid fields are not modified by timer code.
125 * 123 *
126 * Permissions: It is assumed that the clock_settime() function defined 124 * Permissions: It is assumed that the clock_settime() function defined
127 * for each clock will take care of permission checks. Some 125 * for each clock will take care of permission checks. Some
@@ -138,6 +136,7 @@ static struct k_clock posix_clocks[MAX_CLOCKS];
138 */ 136 */
139static int common_nsleep(const clockid_t, int flags, struct timespec *t, 137static int common_nsleep(const clockid_t, int flags, struct timespec *t,
140 struct timespec __user *rmtp); 138 struct timespec __user *rmtp);
139static int common_timer_create(struct k_itimer *new_timer);
141static void common_timer_get(struct k_itimer *, struct itimerspec *); 140static void common_timer_get(struct k_itimer *, struct itimerspec *);
142static int common_timer_set(struct k_itimer *, int, 141static int common_timer_set(struct k_itimer *, int,
143 struct itimerspec *, struct itimerspec *); 142 struct itimerspec *, struct itimerspec *);
@@ -158,76 +157,24 @@ static inline void unlock_timer(struct k_itimer *timr, unsigned long flags)
158 spin_unlock_irqrestore(&timr->it_lock, flags); 157 spin_unlock_irqrestore(&timr->it_lock, flags);
159} 158}
160 159
161/* 160/* Get clock_realtime */
162 * Call the k_clock hook function if non-null, or the default function. 161static int posix_clock_realtime_get(clockid_t which_clock, struct timespec *tp)
163 */
164#define CLOCK_DISPATCH(clock, call, arglist) \
165 ((clock) < 0 ? posix_cpu_##call arglist : \
166 (posix_clocks[clock].call != NULL \
167 ? (*posix_clocks[clock].call) arglist : common_##call arglist))
168
169/*
170 * Default clock hook functions when the struct k_clock passed
171 * to register_posix_clock leaves a function pointer null.
172 *
173 * The function common_CALL is the default implementation for
174 * the function pointer CALL in struct k_clock.
175 */
176
177static inline int common_clock_getres(const clockid_t which_clock,
178 struct timespec *tp)
179{
180 tp->tv_sec = 0;
181 tp->tv_nsec = posix_clocks[which_clock].res;
182 return 0;
183}
184
185/*
186 * Get real time for posix timers
187 */
188static int common_clock_get(clockid_t which_clock, struct timespec *tp)
189{ 162{
190 ktime_get_real_ts(tp); 163 ktime_get_real_ts(tp);
191 return 0; 164 return 0;
192} 165}
193 166
194static inline int common_clock_set(const clockid_t which_clock, 167/* Set clock_realtime */
195 struct timespec *tp) 168static int posix_clock_realtime_set(const clockid_t which_clock,
169 const struct timespec *tp)
196{ 170{
197 return do_sys_settimeofday(tp, NULL); 171 return do_sys_settimeofday(tp, NULL);
198} 172}
199 173
200static int common_timer_create(struct k_itimer *new_timer) 174static int posix_clock_realtime_adj(const clockid_t which_clock,
201{ 175 struct timex *t)
202 hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
203 return 0;
204}
205
206static int no_timer_create(struct k_itimer *new_timer)
207{
208 return -EOPNOTSUPP;
209}
210
211static int no_nsleep(const clockid_t which_clock, int flags,
212 struct timespec *tsave, struct timespec __user *rmtp)
213{
214 return -EOPNOTSUPP;
215}
216
217/*
218 * Return nonzero if we know a priori this clockid_t value is bogus.
219 */
220static inline int invalid_clockid(const clockid_t which_clock)
221{ 176{
222 if (which_clock < 0) /* CPU clock, posix_cpu_* will check it */ 177 return do_adjtimex(t);
223 return 0;
224 if ((unsigned) which_clock >= MAX_CLOCKS)
225 return 1;
226 if (posix_clocks[which_clock].clock_getres != NULL)
227 return 0;
228 if (posix_clocks[which_clock].res != 0)
229 return 0;
230 return 1;
231} 178}
232 179
233/* 180/*
@@ -240,7 +187,7 @@ static int posix_ktime_get_ts(clockid_t which_clock, struct timespec *tp)
240} 187}
241 188
242/* 189/*
243 * Get monotonic time for posix timers 190 * Get monotonic-raw time for posix timers
244 */ 191 */
245static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec *tp) 192static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec *tp)
246{ 193{
@@ -267,46 +214,70 @@ static int posix_get_coarse_res(const clockid_t which_clock, struct timespec *tp
267 *tp = ktime_to_timespec(KTIME_LOW_RES); 214 *tp = ktime_to_timespec(KTIME_LOW_RES);
268 return 0; 215 return 0;
269} 216}
217
218static int posix_get_boottime(const clockid_t which_clock, struct timespec *tp)
219{
220 get_monotonic_boottime(tp);
221 return 0;
222}
223
224
270/* 225/*
271 * Initialize everything, well, just everything in Posix clocks/timers ;) 226 * Initialize everything, well, just everything in Posix clocks/timers ;)
272 */ 227 */
273static __init int init_posix_timers(void) 228static __init int init_posix_timers(void)
274{ 229{
275 struct k_clock clock_realtime = { 230 struct k_clock clock_realtime = {
276 .clock_getres = hrtimer_get_res, 231 .clock_getres = hrtimer_get_res,
232 .clock_get = posix_clock_realtime_get,
233 .clock_set = posix_clock_realtime_set,
234 .clock_adj = posix_clock_realtime_adj,
235 .nsleep = common_nsleep,
236 .nsleep_restart = hrtimer_nanosleep_restart,
237 .timer_create = common_timer_create,
238 .timer_set = common_timer_set,
239 .timer_get = common_timer_get,
240 .timer_del = common_timer_del,
277 }; 241 };
278 struct k_clock clock_monotonic = { 242 struct k_clock clock_monotonic = {
279 .clock_getres = hrtimer_get_res, 243 .clock_getres = hrtimer_get_res,
280 .clock_get = posix_ktime_get_ts, 244 .clock_get = posix_ktime_get_ts,
281 .clock_set = do_posix_clock_nosettime, 245 .nsleep = common_nsleep,
246 .nsleep_restart = hrtimer_nanosleep_restart,
247 .timer_create = common_timer_create,
248 .timer_set = common_timer_set,
249 .timer_get = common_timer_get,
250 .timer_del = common_timer_del,
282 }; 251 };
283 struct k_clock clock_monotonic_raw = { 252 struct k_clock clock_monotonic_raw = {
284 .clock_getres = hrtimer_get_res, 253 .clock_getres = hrtimer_get_res,
285 .clock_get = posix_get_monotonic_raw, 254 .clock_get = posix_get_monotonic_raw,
286 .clock_set = do_posix_clock_nosettime,
287 .timer_create = no_timer_create,
288 .nsleep = no_nsleep,
289 }; 255 };
290 struct k_clock clock_realtime_coarse = { 256 struct k_clock clock_realtime_coarse = {
291 .clock_getres = posix_get_coarse_res, 257 .clock_getres = posix_get_coarse_res,
292 .clock_get = posix_get_realtime_coarse, 258 .clock_get = posix_get_realtime_coarse,
293 .clock_set = do_posix_clock_nosettime,
294 .timer_create = no_timer_create,
295 .nsleep = no_nsleep,
296 }; 259 };
297 struct k_clock clock_monotonic_coarse = { 260 struct k_clock clock_monotonic_coarse = {
298 .clock_getres = posix_get_coarse_res, 261 .clock_getres = posix_get_coarse_res,
299 .clock_get = posix_get_monotonic_coarse, 262 .clock_get = posix_get_monotonic_coarse,
300 .clock_set = do_posix_clock_nosettime, 263 };
301 .timer_create = no_timer_create, 264 struct k_clock clock_boottime = {
302 .nsleep = no_nsleep, 265 .clock_getres = hrtimer_get_res,
266 .clock_get = posix_get_boottime,
267 .nsleep = common_nsleep,
268 .nsleep_restart = hrtimer_nanosleep_restart,
269 .timer_create = common_timer_create,
270 .timer_set = common_timer_set,
271 .timer_get = common_timer_get,
272 .timer_del = common_timer_del,
303 }; 273 };
304 274
305 register_posix_clock(CLOCK_REALTIME, &clock_realtime); 275 posix_timers_register_clock(CLOCK_REALTIME, &clock_realtime);
306 register_posix_clock(CLOCK_MONOTONIC, &clock_monotonic); 276 posix_timers_register_clock(CLOCK_MONOTONIC, &clock_monotonic);
307 register_posix_clock(CLOCK_MONOTONIC_RAW, &clock_monotonic_raw); 277 posix_timers_register_clock(CLOCK_MONOTONIC_RAW, &clock_monotonic_raw);
308 register_posix_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse); 278 posix_timers_register_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse);
309 register_posix_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse); 279 posix_timers_register_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse);
280 posix_timers_register_clock(CLOCK_BOOTTIME, &clock_boottime);
310 281
311 posix_timers_cache = kmem_cache_create("posix_timers_cache", 282 posix_timers_cache = kmem_cache_create("posix_timers_cache",
312 sizeof (struct k_itimer), 0, SLAB_PANIC, 283 sizeof (struct k_itimer), 0, SLAB_PANIC,
@@ -482,17 +453,29 @@ static struct pid *good_sigevent(sigevent_t * event)
482 return task_pid(rtn); 453 return task_pid(rtn);
483} 454}
484 455
485void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock) 456void posix_timers_register_clock(const clockid_t clock_id,
457 struct k_clock *new_clock)
486{ 458{
487 if ((unsigned) clock_id >= MAX_CLOCKS) { 459 if ((unsigned) clock_id >= MAX_CLOCKS) {
488 printk("POSIX clock register failed for clock_id %d\n", 460 printk(KERN_WARNING "POSIX clock register failed for clock_id %d\n",
461 clock_id);
462 return;
463 }
464
465 if (!new_clock->clock_get) {
466 printk(KERN_WARNING "POSIX clock id %d lacks clock_get()\n",
467 clock_id);
468 return;
469 }
470 if (!new_clock->clock_getres) {
471 printk(KERN_WARNING "POSIX clock id %d lacks clock_getres()\n",
489 clock_id); 472 clock_id);
490 return; 473 return;
491 } 474 }
492 475
493 posix_clocks[clock_id] = *new_clock; 476 posix_clocks[clock_id] = *new_clock;
494} 477}
495EXPORT_SYMBOL_GPL(register_posix_clock); 478EXPORT_SYMBOL_GPL(posix_timers_register_clock);
496 479
497static struct k_itimer * alloc_posix_timer(void) 480static struct k_itimer * alloc_posix_timer(void)
498{ 481{
@@ -523,19 +506,39 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set)
523 kmem_cache_free(posix_timers_cache, tmr); 506 kmem_cache_free(posix_timers_cache, tmr);
524} 507}
525 508
509static struct k_clock *clockid_to_kclock(const clockid_t id)
510{
511 if (id < 0)
512 return (id & CLOCKFD_MASK) == CLOCKFD ?
513 &clock_posix_dynamic : &clock_posix_cpu;
514
515 if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres)
516 return NULL;
517 return &posix_clocks[id];
518}
519
520static int common_timer_create(struct k_itimer *new_timer)
521{
522 hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
523 return 0;
524}
525
526/* Create a POSIX.1b interval timer. */ 526/* Create a POSIX.1b interval timer. */
527 527
528SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, 528SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
529 struct sigevent __user *, timer_event_spec, 529 struct sigevent __user *, timer_event_spec,
530 timer_t __user *, created_timer_id) 530 timer_t __user *, created_timer_id)
531{ 531{
532 struct k_clock *kc = clockid_to_kclock(which_clock);
532 struct k_itimer *new_timer; 533 struct k_itimer *new_timer;
533 int error, new_timer_id; 534 int error, new_timer_id;
534 sigevent_t event; 535 sigevent_t event;
535 int it_id_set = IT_ID_NOT_SET; 536 int it_id_set = IT_ID_NOT_SET;
536 537
537 if (invalid_clockid(which_clock)) 538 if (!kc)
538 return -EINVAL; 539 return -EINVAL;
540 if (!kc->timer_create)
541 return -EOPNOTSUPP;
539 542
540 new_timer = alloc_posix_timer(); 543 new_timer = alloc_posix_timer();
541 if (unlikely(!new_timer)) 544 if (unlikely(!new_timer))
@@ -597,7 +600,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
597 goto out; 600 goto out;
598 } 601 }
599 602
600 error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer)); 603 error = kc->timer_create(new_timer);
601 if (error) 604 if (error)
602 goto out; 605 goto out;
603 606
@@ -607,7 +610,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
607 spin_unlock_irq(&current->sighand->siglock); 610 spin_unlock_irq(&current->sighand->siglock);
608 611
609 return 0; 612 return 0;
610 /* 613 /*
611 * In the case of the timer belonging to another task, after 614 * In the case of the timer belonging to another task, after
612 * the task is unlocked, the timer is owned by the other task 615 * the task is unlocked, the timer is owned by the other task
613 * and may cease to exist at any time. Don't use or modify 616 * and may cease to exist at any time. Don't use or modify
@@ -709,22 +712,28 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting)
709SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, 712SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
710 struct itimerspec __user *, setting) 713 struct itimerspec __user *, setting)
711{ 714{
712 struct k_itimer *timr;
713 struct itimerspec cur_setting; 715 struct itimerspec cur_setting;
716 struct k_itimer *timr;
717 struct k_clock *kc;
714 unsigned long flags; 718 unsigned long flags;
719 int ret = 0;
715 720
716 timr = lock_timer(timer_id, &flags); 721 timr = lock_timer(timer_id, &flags);
717 if (!timr) 722 if (!timr)
718 return -EINVAL; 723 return -EINVAL;
719 724
720 CLOCK_DISPATCH(timr->it_clock, timer_get, (timr, &cur_setting)); 725 kc = clockid_to_kclock(timr->it_clock);
726 if (WARN_ON_ONCE(!kc || !kc->timer_get))
727 ret = -EINVAL;
728 else
729 kc->timer_get(timr, &cur_setting);
721 730
722 unlock_timer(timr, flags); 731 unlock_timer(timr, flags);
723 732
724 if (copy_to_user(setting, &cur_setting, sizeof (cur_setting))) 733 if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting)))
725 return -EFAULT; 734 return -EFAULT;
726 735
727 return 0; 736 return ret;
728} 737}
729 738
730/* 739/*
@@ -813,6 +822,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
813 int error = 0; 822 int error = 0;
814 unsigned long flag; 823 unsigned long flag;
815 struct itimerspec *rtn = old_setting ? &old_spec : NULL; 824 struct itimerspec *rtn = old_setting ? &old_spec : NULL;
825 struct k_clock *kc;
816 826
817 if (!new_setting) 827 if (!new_setting)
818 return -EINVAL; 828 return -EINVAL;
@@ -828,8 +838,11 @@ retry:
828 if (!timr) 838 if (!timr)
829 return -EINVAL; 839 return -EINVAL;
830 840
831 error = CLOCK_DISPATCH(timr->it_clock, timer_set, 841 kc = clockid_to_kclock(timr->it_clock);
832 (timr, flags, &new_spec, rtn)); 842 if (WARN_ON_ONCE(!kc || !kc->timer_set))
843 error = -EINVAL;
844 else
845 error = kc->timer_set(timr, flags, &new_spec, rtn);
833 846
834 unlock_timer(timr, flag); 847 unlock_timer(timr, flag);
835 if (error == TIMER_RETRY) { 848 if (error == TIMER_RETRY) {
@@ -844,7 +857,7 @@ retry:
844 return error; 857 return error;
845} 858}
846 859
847static inline int common_timer_del(struct k_itimer *timer) 860static int common_timer_del(struct k_itimer *timer)
848{ 861{
849 timer->it.real.interval.tv64 = 0; 862 timer->it.real.interval.tv64 = 0;
850 863
@@ -855,7 +868,11 @@ static inline int common_timer_del(struct k_itimer *timer)
855 868
856static inline int timer_delete_hook(struct k_itimer *timer) 869static inline int timer_delete_hook(struct k_itimer *timer)
857{ 870{
858 return CLOCK_DISPATCH(timer->it_clock, timer_del, (timer)); 871 struct k_clock *kc = clockid_to_kclock(timer->it_clock);
872
873 if (WARN_ON_ONCE(!kc || !kc->timer_del))
874 return -EINVAL;
875 return kc->timer_del(timer);
859} 876}
860 877
861/* Delete a POSIX.1b interval timer. */ 878/* Delete a POSIX.1b interval timer. */
@@ -927,69 +944,76 @@ void exit_itimers(struct signal_struct *sig)
927 } 944 }
928} 945}
929 946
930/* Not available / possible... functions */
931int do_posix_clock_nosettime(const clockid_t clockid, struct timespec *tp)
932{
933 return -EINVAL;
934}
935EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);
936
937int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
938 struct timespec *t, struct timespec __user *r)
939{
940#ifndef ENOTSUP
941 return -EOPNOTSUPP; /* aka ENOTSUP in userland for POSIX */
942#else /* parisc does define it separately. */
943 return -ENOTSUP;
944#endif
945}
946EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
947
948SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, 947SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
949 const struct timespec __user *, tp) 948 const struct timespec __user *, tp)
950{ 949{
950 struct k_clock *kc = clockid_to_kclock(which_clock);
951 struct timespec new_tp; 951 struct timespec new_tp;
952 952
953 if (invalid_clockid(which_clock)) 953 if (!kc || !kc->clock_set)
954 return -EINVAL; 954 return -EINVAL;
955
955 if (copy_from_user(&new_tp, tp, sizeof (*tp))) 956 if (copy_from_user(&new_tp, tp, sizeof (*tp)))
956 return -EFAULT; 957 return -EFAULT;
957 958
958 return CLOCK_DISPATCH(which_clock, clock_set, (which_clock, &new_tp)); 959 return kc->clock_set(which_clock, &new_tp);
959} 960}
960 961
961SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, 962SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
962 struct timespec __user *,tp) 963 struct timespec __user *,tp)
963{ 964{
965 struct k_clock *kc = clockid_to_kclock(which_clock);
964 struct timespec kernel_tp; 966 struct timespec kernel_tp;
965 int error; 967 int error;
966 968
967 if (invalid_clockid(which_clock)) 969 if (!kc)
968 return -EINVAL; 970 return -EINVAL;
969 error = CLOCK_DISPATCH(which_clock, clock_get, 971
970 (which_clock, &kernel_tp)); 972 error = kc->clock_get(which_clock, &kernel_tp);
973
971 if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp))) 974 if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
972 error = -EFAULT; 975 error = -EFAULT;
973 976
974 return error; 977 return error;
978}
979
980SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock,
981 struct timex __user *, utx)
982{
983 struct k_clock *kc = clockid_to_kclock(which_clock);
984 struct timex ktx;
985 int err;
986
987 if (!kc)
988 return -EINVAL;
989 if (!kc->clock_adj)
990 return -EOPNOTSUPP;
991
992 if (copy_from_user(&ktx, utx, sizeof(ktx)))
993 return -EFAULT;
994
995 err = kc->clock_adj(which_clock, &ktx);
996
997 if (!err && copy_to_user(utx, &ktx, sizeof(ktx)))
998 return -EFAULT;
975 999
1000 return err;
976} 1001}
977 1002
978SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, 1003SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
979 struct timespec __user *, tp) 1004 struct timespec __user *, tp)
980{ 1005{
1006 struct k_clock *kc = clockid_to_kclock(which_clock);
981 struct timespec rtn_tp; 1007 struct timespec rtn_tp;
982 int error; 1008 int error;
983 1009
984 if (invalid_clockid(which_clock)) 1010 if (!kc)
985 return -EINVAL; 1011 return -EINVAL;
986 1012
987 error = CLOCK_DISPATCH(which_clock, clock_getres, 1013 error = kc->clock_getres(which_clock, &rtn_tp);
988 (which_clock, &rtn_tp));
989 1014
990 if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) { 1015 if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
991 error = -EFAULT; 1016 error = -EFAULT;
992 }
993 1017
994 return error; 1018 return error;
995} 1019}
@@ -1009,10 +1033,13 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
1009 const struct timespec __user *, rqtp, 1033 const struct timespec __user *, rqtp,
1010 struct timespec __user *, rmtp) 1034 struct timespec __user *, rmtp)
1011{ 1035{
1036 struct k_clock *kc = clockid_to_kclock(which_clock);
1012 struct timespec t; 1037 struct timespec t;
1013 1038
1014 if (invalid_clockid(which_clock)) 1039 if (!kc)
1015 return -EINVAL; 1040 return -EINVAL;
1041 if (!kc->nsleep)
1042 return -ENANOSLEEP_NOTSUP;
1016 1043
1017 if (copy_from_user(&t, rqtp, sizeof (struct timespec))) 1044 if (copy_from_user(&t, rqtp, sizeof (struct timespec)))
1018 return -EFAULT; 1045 return -EFAULT;
@@ -1020,27 +1047,20 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
1020 if (!timespec_valid(&t)) 1047 if (!timespec_valid(&t))
1021 return -EINVAL; 1048 return -EINVAL;
1022 1049
1023 return CLOCK_DISPATCH(which_clock, nsleep, 1050 return kc->nsleep(which_clock, flags, &t, rmtp);
1024 (which_clock, flags, &t, rmtp));
1025}
1026
1027/*
1028 * nanosleep_restart for monotonic and realtime clocks
1029 */
1030static int common_nsleep_restart(struct restart_block *restart_block)
1031{
1032 return hrtimer_nanosleep_restart(restart_block);
1033} 1051}
1034 1052
1035/* 1053/*
1036 * This will restart clock_nanosleep. This is required only by 1054 * This will restart clock_nanosleep. This is required only by
1037 * compat_clock_nanosleep_restart for now. 1055 * compat_clock_nanosleep_restart for now.
1038 */ 1056 */
1039long 1057long clock_nanosleep_restart(struct restart_block *restart_block)
1040clock_nanosleep_restart(struct restart_block *restart_block)
1041{ 1058{
1042 clockid_t which_clock = restart_block->arg0; 1059 clockid_t which_clock = restart_block->nanosleep.index;
1060 struct k_clock *kc = clockid_to_kclock(which_clock);
1061
1062 if (WARN_ON_ONCE(!kc || !kc->nsleep_restart))
1063 return -EINVAL;
1043 1064
1044 return CLOCK_DISPATCH(which_clock, nsleep_restart, 1065 return kc->nsleep_restart(restart_block);
1045 (restart_block));
1046} 1066}
diff --git a/kernel/time.c b/kernel/time.c
index 55337a816b20..8e8dc6d705c9 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -150,7 +150,7 @@ static inline void warp_clock(void)
150 * various programs will get confused when the clock gets warped. 150 * various programs will get confused when the clock gets warped.
151 */ 151 */
152 152
153int do_sys_settimeofday(struct timespec *tv, struct timezone *tz) 153int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
154{ 154{
155 static int firsttime = 1; 155 static int firsttime = 1;
156 int error = 0; 156 int error = 0;
@@ -674,7 +674,6 @@ u64 nsecs_to_jiffies64(u64 n)
674#endif 674#endif
675} 675}
676 676
677
678/** 677/**
679 * nsecs_to_jiffies - Convert nsecs in u64 to jiffies 678 * nsecs_to_jiffies - Convert nsecs in u64 to jiffies
680 * 679 *
@@ -693,23 +692,6 @@ unsigned long nsecs_to_jiffies(u64 n)
693 return (unsigned long)nsecs_to_jiffies64(n); 692 return (unsigned long)nsecs_to_jiffies64(n);
694} 693}
695 694
696#if (BITS_PER_LONG < 64)
697u64 get_jiffies_64(void)
698{
699 unsigned long seq;
700 u64 ret;
701
702 do {
703 seq = read_seqbegin(&xtime_lock);
704 ret = jiffies_64;
705 } while (read_seqretry(&xtime_lock, seq));
706 return ret;
707}
708EXPORT_SYMBOL(get_jiffies_64);
709#endif
710
711EXPORT_SYMBOL(jiffies);
712
713/* 695/*
714 * Add two timespec values and do a safety check for overflow. 696 * Add two timespec values and do a safety check for overflow.
715 * It's assumed that both values are valid (>= 0) 697 * It's assumed that both values are valid (>= 0)
diff --git a/kernel/time/Makefile b/kernel/time/Makefile
index ee266620b06c..b0425991e9ac 100644
--- a/kernel/time/Makefile
+++ b/kernel/time/Makefile
@@ -1,4 +1,5 @@
1obj-y += timekeeping.o ntp.o clocksource.o jiffies.o timer_list.o timecompare.o timeconv.o 1obj-y += timekeeping.o ntp.o clocksource.o jiffies.o timer_list.o timecompare.o
2obj-y += timeconv.o posix-clock.o
2 3
3obj-$(CONFIG_GENERIC_CLOCKEVENTS_BUILD) += clockevents.o 4obj-$(CONFIG_GENERIC_CLOCKEVENTS_BUILD) += clockevents.o
4obj-$(CONFIG_GENERIC_CLOCKEVENTS) += tick-common.o 5obj-$(CONFIG_GENERIC_CLOCKEVENTS) += tick-common.o
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index d7395fdfb9f3..0d74b9ba90c8 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -18,7 +18,6 @@
18#include <linux/notifier.h> 18#include <linux/notifier.h>
19#include <linux/smp.h> 19#include <linux/smp.h>
20#include <linux/sysdev.h> 20#include <linux/sysdev.h>
21#include <linux/tick.h>
22 21
23#include "tick-internal.h" 22#include "tick-internal.h"
24 23
diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c
index 5404a8456909..b2fa506667c0 100644
--- a/kernel/time/jiffies.c
+++ b/kernel/time/jiffies.c
@@ -22,8 +22,11 @@
22************************************************************************/ 22************************************************************************/
23#include <linux/clocksource.h> 23#include <linux/clocksource.h>
24#include <linux/jiffies.h> 24#include <linux/jiffies.h>
25#include <linux/module.h>
25#include <linux/init.h> 26#include <linux/init.h>
26 27
28#include "tick-internal.h"
29
27/* The Jiffies based clocksource is the lowest common 30/* The Jiffies based clocksource is the lowest common
28 * denominator clock source which should function on 31 * denominator clock source which should function on
29 * all systems. It has the same coarse resolution as 32 * all systems. It has the same coarse resolution as
@@ -64,6 +67,23 @@ struct clocksource clocksource_jiffies = {
64 .shift = JIFFIES_SHIFT, 67 .shift = JIFFIES_SHIFT,
65}; 68};
66 69
70#if (BITS_PER_LONG < 64)
71u64 get_jiffies_64(void)
72{
73 unsigned long seq;
74 u64 ret;
75
76 do {
77 seq = read_seqbegin(&xtime_lock);
78 ret = jiffies_64;
79 } while (read_seqretry(&xtime_lock, seq));
80 return ret;
81}
82EXPORT_SYMBOL(get_jiffies_64);
83#endif
84
85EXPORT_SYMBOL(jiffies);
86
67static int __init init_jiffies_clocksource(void) 87static int __init init_jiffies_clocksource(void)
68{ 88{
69 return clocksource_register(&clocksource_jiffies); 89 return clocksource_register(&clocksource_jiffies);
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 5c00242fa921..5f1bb8e2008f 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -16,6 +16,8 @@
16#include <linux/mm.h> 16#include <linux/mm.h>
17#include <linux/module.h> 17#include <linux/module.h>
18 18
19#include "tick-internal.h"
20
19/* 21/*
20 * NTP timekeeping variables: 22 * NTP timekeeping variables:
21 */ 23 */
@@ -646,6 +648,17 @@ int do_adjtimex(struct timex *txc)
646 hrtimer_cancel(&leap_timer); 648 hrtimer_cancel(&leap_timer);
647 } 649 }
648 650
651 if (txc->modes & ADJ_SETOFFSET) {
652 struct timespec delta;
653 delta.tv_sec = txc->time.tv_sec;
654 delta.tv_nsec = txc->time.tv_usec;
655 if (!(txc->modes & ADJ_NANO))
656 delta.tv_nsec *= 1000;
657 result = timekeeping_inject_offset(&delta);
658 if (result)
659 return result;
660 }
661
649 getnstimeofday(&ts); 662 getnstimeofday(&ts);
650 663
651 write_seqlock_irq(&xtime_lock); 664 write_seqlock_irq(&xtime_lock);
diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c
new file mode 100644
index 000000000000..25028dd4fa18
--- /dev/null
+++ b/kernel/time/posix-clock.c
@@ -0,0 +1,451 @@
1/*
2 * posix-clock.c - support for dynamic clock devices
3 *
4 * Copyright (C) 2010 OMICRON electronics GmbH
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20#include <linux/device.h>
21#include <linux/file.h>
22#include <linux/mutex.h>
23#include <linux/posix-clock.h>
24#include <linux/slab.h>
25#include <linux/syscalls.h>
26#include <linux/uaccess.h>
27
28static void delete_clock(struct kref *kref);
29
30/*
31 * Returns NULL if the posix_clock instance attached to 'fp' is old and stale.
32 */
33static struct posix_clock *get_posix_clock(struct file *fp)
34{
35 struct posix_clock *clk = fp->private_data;
36
37 mutex_lock(&clk->mutex);
38
39 if (!clk->zombie)
40 return clk;
41
42 mutex_unlock(&clk->mutex);
43
44 return NULL;
45}
46
47static void put_posix_clock(struct posix_clock *clk)
48{
49 mutex_unlock(&clk->mutex);
50}
51
52static ssize_t posix_clock_read(struct file *fp, char __user *buf,
53 size_t count, loff_t *ppos)
54{
55 struct posix_clock *clk = get_posix_clock(fp);
56 int err = -EINVAL;
57
58 if (!clk)
59 return -ENODEV;
60
61 if (clk->ops.read)
62 err = clk->ops.read(clk, fp->f_flags, buf, count);
63
64 put_posix_clock(clk);
65
66 return err;
67}
68
69static unsigned int posix_clock_poll(struct file *fp, poll_table *wait)
70{
71 struct posix_clock *clk = get_posix_clock(fp);
72 int result = 0;
73
74 if (!clk)
75 return -ENODEV;
76
77 if (clk->ops.poll)
78 result = clk->ops.poll(clk, fp, wait);
79
80 put_posix_clock(clk);
81
82 return result;
83}
84
85static int posix_clock_fasync(int fd, struct file *fp, int on)
86{
87 struct posix_clock *clk = get_posix_clock(fp);
88 int err = 0;
89
90 if (!clk)
91 return -ENODEV;
92
93 if (clk->ops.fasync)
94 err = clk->ops.fasync(clk, fd, fp, on);
95
96 put_posix_clock(clk);
97
98 return err;
99}
100
101static int posix_clock_mmap(struct file *fp, struct vm_area_struct *vma)
102{
103 struct posix_clock *clk = get_posix_clock(fp);
104 int err = -ENODEV;
105
106 if (!clk)
107 return -ENODEV;
108
109 if (clk->ops.mmap)
110 err = clk->ops.mmap(clk, vma);
111
112 put_posix_clock(clk);
113
114 return err;
115}
116
117static long posix_clock_ioctl(struct file *fp,
118 unsigned int cmd, unsigned long arg)
119{
120 struct posix_clock *clk = get_posix_clock(fp);
121 int err = -ENOTTY;
122
123 if (!clk)
124 return -ENODEV;
125
126 if (clk->ops.ioctl)
127 err = clk->ops.ioctl(clk, cmd, arg);
128
129 put_posix_clock(clk);
130
131 return err;
132}
133
134#ifdef CONFIG_COMPAT
135static long posix_clock_compat_ioctl(struct file *fp,
136 unsigned int cmd, unsigned long arg)
137{
138 struct posix_clock *clk = get_posix_clock(fp);
139 int err = -ENOTTY;
140
141 if (!clk)
142 return -ENODEV;
143
144 if (clk->ops.ioctl)
145 err = clk->ops.ioctl(clk, cmd, arg);
146
147 put_posix_clock(clk);
148
149 return err;
150}
151#endif
152
153static int posix_clock_open(struct inode *inode, struct file *fp)
154{
155 int err;
156 struct posix_clock *clk =
157 container_of(inode->i_cdev, struct posix_clock, cdev);
158
159 mutex_lock(&clk->mutex);
160
161 if (clk->zombie) {
162 err = -ENODEV;
163 goto out;
164 }
165 if (clk->ops.open)
166 err = clk->ops.open(clk, fp->f_mode);
167 else
168 err = 0;
169
170 if (!err) {
171 kref_get(&clk->kref);
172 fp->private_data = clk;
173 }
174out:
175 mutex_unlock(&clk->mutex);
176 return err;
177}
178
179static int posix_clock_release(struct inode *inode, struct file *fp)
180{
181 struct posix_clock *clk = fp->private_data;
182 int err = 0;
183
184 if (clk->ops.release)
185 err = clk->ops.release(clk);
186
187 kref_put(&clk->kref, delete_clock);
188
189 fp->private_data = NULL;
190
191 return err;
192}
193
194static const struct file_operations posix_clock_file_operations = {
195 .owner = THIS_MODULE,
196 .llseek = no_llseek,
197 .read = posix_clock_read,
198 .poll = posix_clock_poll,
199 .unlocked_ioctl = posix_clock_ioctl,
200 .open = posix_clock_open,
201 .release = posix_clock_release,
202 .fasync = posix_clock_fasync,
203 .mmap = posix_clock_mmap,
204#ifdef CONFIG_COMPAT
205 .compat_ioctl = posix_clock_compat_ioctl,
206#endif
207};
208
209int posix_clock_register(struct posix_clock *clk, dev_t devid)
210{
211 int err;
212
213 kref_init(&clk->kref);
214 mutex_init(&clk->mutex);
215
216 cdev_init(&clk->cdev, &posix_clock_file_operations);
217 clk->cdev.owner = clk->ops.owner;
218 err = cdev_add(&clk->cdev, devid, 1);
219 if (err)
220 goto no_cdev;
221
222 return err;
223no_cdev:
224 mutex_destroy(&clk->mutex);
225 return err;
226}
227EXPORT_SYMBOL_GPL(posix_clock_register);
228
229static void delete_clock(struct kref *kref)
230{
231 struct posix_clock *clk = container_of(kref, struct posix_clock, kref);
232 mutex_destroy(&clk->mutex);
233 if (clk->release)
234 clk->release(clk);
235}
236
237void posix_clock_unregister(struct posix_clock *clk)
238{
239 cdev_del(&clk->cdev);
240
241 mutex_lock(&clk->mutex);
242 clk->zombie = true;
243 mutex_unlock(&clk->mutex);
244
245 kref_put(&clk->kref, delete_clock);
246}
247EXPORT_SYMBOL_GPL(posix_clock_unregister);
248
249struct posix_clock_desc {
250 struct file *fp;
251 struct posix_clock *clk;
252};
253
254static int get_clock_desc(const clockid_t id, struct posix_clock_desc *cd)
255{
256 struct file *fp = fget(CLOCKID_TO_FD(id));
257 int err = -EINVAL;
258
259 if (!fp)
260 return err;
261
262 if (fp->f_op->open != posix_clock_open || !fp->private_data)
263 goto out;
264
265 cd->fp = fp;
266 cd->clk = get_posix_clock(fp);
267
268 err = cd->clk ? 0 : -ENODEV;
269out:
270 if (err)
271 fput(fp);
272 return err;
273}
274
275static void put_clock_desc(struct posix_clock_desc *cd)
276{
277 put_posix_clock(cd->clk);
278 fput(cd->fp);
279}
280
281static int pc_clock_adjtime(clockid_t id, struct timex *tx)
282{
283 struct posix_clock_desc cd;
284 int err;
285
286 err = get_clock_desc(id, &cd);
287 if (err)
288 return err;
289
290 if ((cd.fp->f_mode & FMODE_WRITE) == 0) {
291 err = -EACCES;
292 goto out;
293 }
294
295 if (cd.clk->ops.clock_adjtime)
296 err = cd.clk->ops.clock_adjtime(cd.clk, tx);
297 else
298 err = -EOPNOTSUPP;
299out:
300 put_clock_desc(&cd);
301
302 return err;
303}
304
305static int pc_clock_gettime(clockid_t id, struct timespec *ts)
306{
307 struct posix_clock_desc cd;
308 int err;
309
310 err = get_clock_desc(id, &cd);
311 if (err)
312 return err;
313
314 if (cd.clk->ops.clock_gettime)
315 err = cd.clk->ops.clock_gettime(cd.clk, ts);
316 else
317 err = -EOPNOTSUPP;
318
319 put_clock_desc(&cd);
320
321 return err;
322}
323
324static int pc_clock_getres(clockid_t id, struct timespec *ts)
325{
326 struct posix_clock_desc cd;
327 int err;
328
329 err = get_clock_desc(id, &cd);
330 if (err)
331 return err;
332
333 if (cd.clk->ops.clock_getres)
334 err = cd.clk->ops.clock_getres(cd.clk, ts);
335 else
336 err = -EOPNOTSUPP;
337
338 put_clock_desc(&cd);
339
340 return err;
341}
342
343static int pc_clock_settime(clockid_t id, const struct timespec *ts)
344{
345 struct posix_clock_desc cd;
346 int err;
347
348 err = get_clock_desc(id, &cd);
349 if (err)
350 return err;
351
352 if ((cd.fp->f_mode & FMODE_WRITE) == 0) {
353 err = -EACCES;
354 goto out;
355 }
356
357 if (cd.clk->ops.clock_settime)
358 err = cd.clk->ops.clock_settime(cd.clk, ts);
359 else
360 err = -EOPNOTSUPP;
361out:
362 put_clock_desc(&cd);
363
364 return err;
365}
366
367static int pc_timer_create(struct k_itimer *kit)
368{
369 clockid_t id = kit->it_clock;
370 struct posix_clock_desc cd;
371 int err;
372
373 err = get_clock_desc(id, &cd);
374 if (err)
375 return err;
376
377 if (cd.clk->ops.timer_create)
378 err = cd.clk->ops.timer_create(cd.clk, kit);
379 else
380 err = -EOPNOTSUPP;
381
382 put_clock_desc(&cd);
383
384 return err;
385}
386
387static int pc_timer_delete(struct k_itimer *kit)
388{
389 clockid_t id = kit->it_clock;
390 struct posix_clock_desc cd;
391 int err;
392
393 err = get_clock_desc(id, &cd);
394 if (err)
395 return err;
396
397 if (cd.clk->ops.timer_delete)
398 err = cd.clk->ops.timer_delete(cd.clk, kit);
399 else
400 err = -EOPNOTSUPP;
401
402 put_clock_desc(&cd);
403
404 return err;
405}
406
407static void pc_timer_gettime(struct k_itimer *kit, struct itimerspec *ts)
408{
409 clockid_t id = kit->it_clock;
410 struct posix_clock_desc cd;
411
412 if (get_clock_desc(id, &cd))
413 return;
414
415 if (cd.clk->ops.timer_gettime)
416 cd.clk->ops.timer_gettime(cd.clk, kit, ts);
417
418 put_clock_desc(&cd);
419}
420
421static int pc_timer_settime(struct k_itimer *kit, int flags,
422 struct itimerspec *ts, struct itimerspec *old)
423{
424 clockid_t id = kit->it_clock;
425 struct posix_clock_desc cd;
426 int err;
427
428 err = get_clock_desc(id, &cd);
429 if (err)
430 return err;
431
432 if (cd.clk->ops.timer_settime)
433 err = cd.clk->ops.timer_settime(cd.clk, kit, flags, ts, old);
434 else
435 err = -EOPNOTSUPP;
436
437 put_clock_desc(&cd);
438
439 return err;
440}
441
442struct k_clock clock_posix_dynamic = {
443 .clock_getres = pc_clock_getres,
444 .clock_set = pc_clock_settime,
445 .clock_get = pc_clock_gettime,
446 .clock_adj = pc_clock_adjtime,
447 .timer_create = pc_timer_create,
448 .timer_set = pc_timer_settime,
449 .timer_del = pc_timer_delete,
450 .timer_get = pc_timer_gettime,
451};
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index a3b5aff62606..da800ffa810c 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -18,7 +18,6 @@
18#include <linux/percpu.h> 18#include <linux/percpu.h>
19#include <linux/profile.h> 19#include <linux/profile.h>
20#include <linux/sched.h> 20#include <linux/sched.h>
21#include <linux/tick.h>
22 21
23#include "tick-internal.h" 22#include "tick-internal.h"
24 23
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index ed228ef6f6b8..119528de8235 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -18,7 +18,6 @@
18#include <linux/percpu.h> 18#include <linux/percpu.h>
19#include <linux/profile.h> 19#include <linux/profile.h>
20#include <linux/sched.h> 20#include <linux/sched.h>
21#include <linux/tick.h>
22 21
23#include <asm/irq_regs.h> 22#include <asm/irq_regs.h>
24 23
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index f65d3a723a64..1009b06d6f89 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -1,6 +1,10 @@
1/* 1/*
2 * tick internal variable and functions used by low/high res code 2 * tick internal variable and functions used by low/high res code
3 */ 3 */
4#include <linux/hrtimer.h>
5#include <linux/tick.h>
6
7#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
4 8
5#define TICK_DO_TIMER_NONE -1 9#define TICK_DO_TIMER_NONE -1
6#define TICK_DO_TIMER_BOOT -2 10#define TICK_DO_TIMER_BOOT -2
@@ -135,3 +139,8 @@ static inline int tick_device_is_functional(struct clock_event_device *dev)
135{ 139{
136 return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 140 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
137} 141}
142
143#endif
144
145extern void do_timer(unsigned long ticks);
146extern seqlock_t xtime_lock;
diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c
index 5cbc101f908b..2d04411a5f05 100644
--- a/kernel/time/tick-oneshot.c
+++ b/kernel/time/tick-oneshot.c
@@ -18,7 +18,6 @@
18#include <linux/percpu.h> 18#include <linux/percpu.h>
19#include <linux/profile.h> 19#include <linux/profile.h>
20#include <linux/sched.h> 20#include <linux/sched.h>
21#include <linux/tick.h>
22 21
23#include "tick-internal.h" 22#include "tick-internal.h"
24 23
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index c55ea2433471..d5097c44b407 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -19,7 +19,6 @@
19#include <linux/percpu.h> 19#include <linux/percpu.h>
20#include <linux/profile.h> 20#include <linux/profile.h>
21#include <linux/sched.h> 21#include <linux/sched.h>
22#include <linux/tick.h>
23#include <linux/module.h> 22#include <linux/module.h>
24 23
25#include <asm/irq_regs.h> 24#include <asm/irq_regs.h>
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index d27c7562902c..3bd7e3d5c632 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -353,7 +353,7 @@ EXPORT_SYMBOL(do_gettimeofday);
353 * 353 *
354 * Sets the time of day to the new time and update NTP and notify hrtimers 354 * Sets the time of day to the new time and update NTP and notify hrtimers
355 */ 355 */
356int do_settimeofday(struct timespec *tv) 356int do_settimeofday(const struct timespec *tv)
357{ 357{
358 struct timespec ts_delta; 358 struct timespec ts_delta;
359 unsigned long flags; 359 unsigned long flags;
@@ -387,6 +387,42 @@ int do_settimeofday(struct timespec *tv)
387 387
388EXPORT_SYMBOL(do_settimeofday); 388EXPORT_SYMBOL(do_settimeofday);
389 389
390
391/**
392 * timekeeping_inject_offset - Adds or subtracts from the current time.
393 * @tv: pointer to the timespec variable containing the offset
394 *
395 * Adds or subtracts an offset value from the current time.
396 */
397int timekeeping_inject_offset(struct timespec *ts)
398{
399 unsigned long flags;
400
401 if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
402 return -EINVAL;
403
404 write_seqlock_irqsave(&xtime_lock, flags);
405
406 timekeeping_forward_now();
407
408 xtime = timespec_add(xtime, *ts);
409 wall_to_monotonic = timespec_sub(wall_to_monotonic, *ts);
410
411 timekeeper.ntp_error = 0;
412 ntp_clear();
413
414 update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
415 timekeeper.mult);
416
417 write_sequnlock_irqrestore(&xtime_lock, flags);
418
419 /* signal hrtimers about time change */
420 clock_was_set();
421
422 return 0;
423}
424EXPORT_SYMBOL(timekeeping_inject_offset);
425
390/** 426/**
391 * change_clocksource - Swaps clocksources if a new one is available 427 * change_clocksource - Swaps clocksources if a new one is available
392 * 428 *
@@ -779,7 +815,7 @@ static cycle_t logarithmic_accumulation(cycle_t offset, int shift)
779 * 815 *
780 * Called from the timer interrupt, must hold a write on xtime_lock. 816 * Called from the timer interrupt, must hold a write on xtime_lock.
781 */ 817 */
782void update_wall_time(void) 818static void update_wall_time(void)
783{ 819{
784 struct clocksource *clock; 820 struct clocksource *clock;
785 cycle_t offset; 821 cycle_t offset;
@@ -871,7 +907,7 @@ void update_wall_time(void)
871 * getboottime - Return the real time of system boot. 907 * getboottime - Return the real time of system boot.
872 * @ts: pointer to the timespec to be set 908 * @ts: pointer to the timespec to be set
873 * 909 *
874 * Returns the time of day in a timespec. 910 * Returns the wall-time of boot in a timespec.
875 * 911 *
876 * This is based on the wall_to_monotonic offset and the total suspend 912 * This is based on the wall_to_monotonic offset and the total suspend
877 * time. Calls to settimeofday will affect the value returned (which 913 * time. Calls to settimeofday will affect the value returned (which
@@ -889,6 +925,55 @@ void getboottime(struct timespec *ts)
889} 925}
890EXPORT_SYMBOL_GPL(getboottime); 926EXPORT_SYMBOL_GPL(getboottime);
891 927
928
929/**
930 * get_monotonic_boottime - Returns monotonic time since boot
931 * @ts: pointer to the timespec to be set
932 *
933 * Returns the monotonic time since boot in a timespec.
934 *
935 * This is similar to CLOCK_MONTONIC/ktime_get_ts, but also
936 * includes the time spent in suspend.
937 */
938void get_monotonic_boottime(struct timespec *ts)
939{
940 struct timespec tomono, sleep;
941 unsigned int seq;
942 s64 nsecs;
943
944 WARN_ON(timekeeping_suspended);
945
946 do {
947 seq = read_seqbegin(&xtime_lock);
948 *ts = xtime;
949 tomono = wall_to_monotonic;
950 sleep = total_sleep_time;
951 nsecs = timekeeping_get_ns();
952
953 } while (read_seqretry(&xtime_lock, seq));
954
955 set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec + sleep.tv_sec,
956 ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs);
957}
958EXPORT_SYMBOL_GPL(get_monotonic_boottime);
959
960/**
961 * ktime_get_boottime - Returns monotonic time since boot in a ktime
962 *
963 * Returns the monotonic time since boot in a ktime
964 *
965 * This is similar to CLOCK_MONTONIC/ktime_get, but also
966 * includes the time spent in suspend.
967 */
968ktime_t ktime_get_boottime(void)
969{
970 struct timespec ts;
971
972 get_monotonic_boottime(&ts);
973 return timespec_to_ktime(ts);
974}
975EXPORT_SYMBOL_GPL(ktime_get_boottime);
976
892/** 977/**
893 * monotonic_to_bootbased - Convert the monotonic time to boot based. 978 * monotonic_to_bootbased - Convert the monotonic time to boot based.
894 * @ts: pointer to the timespec to be converted 979 * @ts: pointer to the timespec to be converted
@@ -910,11 +995,6 @@ struct timespec __current_kernel_time(void)
910 return xtime; 995 return xtime;
911} 996}
912 997
913struct timespec __get_wall_to_monotonic(void)
914{
915 return wall_to_monotonic;
916}
917
918struct timespec current_kernel_time(void) 998struct timespec current_kernel_time(void)
919{ 999{
920 struct timespec now; 1000 struct timespec now;
@@ -946,3 +1026,48 @@ struct timespec get_monotonic_coarse(void)
946 now.tv_nsec + mono.tv_nsec); 1026 now.tv_nsec + mono.tv_nsec);
947 return now; 1027 return now;
948} 1028}
1029
1030/*
1031 * The 64-bit jiffies value is not atomic - you MUST NOT read it
1032 * without sampling the sequence number in xtime_lock.
1033 * jiffies is defined in the linker script...
1034 */
1035void do_timer(unsigned long ticks)
1036{
1037 jiffies_64 += ticks;
1038 update_wall_time();
1039 calc_global_load(ticks);
1040}
1041
1042/**
1043 * get_xtime_and_monotonic_and_sleep_offset() - get xtime, wall_to_monotonic,
1044 * and sleep offsets.
1045 * @xtim: pointer to timespec to be set with xtime
1046 * @wtom: pointer to timespec to be set with wall_to_monotonic
1047 * @sleep: pointer to timespec to be set with time in suspend
1048 */
1049void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,
1050 struct timespec *wtom, struct timespec *sleep)
1051{
1052 unsigned long seq;
1053
1054 do {
1055 seq = read_seqbegin(&xtime_lock);
1056 *xtim = xtime;
1057 *wtom = wall_to_monotonic;
1058 *sleep = total_sleep_time;
1059 } while (read_seqretry(&xtime_lock, seq));
1060}
1061
1062/**
1063 * xtime_update() - advances the timekeeping infrastructure
1064 * @ticks: number of ticks, that have elapsed since the last call.
1065 *
1066 * Must be called with interrupts disabled.
1067 */
1068void xtime_update(unsigned long ticks)
1069{
1070 write_seqlock(&xtime_lock);
1071 do_timer(ticks);
1072 write_sequnlock(&xtime_lock);
1073}
diff --git a/kernel/timer.c b/kernel/timer.c
index 3503c17ac1d3..fd6198692b57 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1324,19 +1324,6 @@ void run_local_timers(void)
1324 raise_softirq(TIMER_SOFTIRQ); 1324 raise_softirq(TIMER_SOFTIRQ);
1325} 1325}
1326 1326
1327/*
1328 * The 64-bit jiffies value is not atomic - you MUST NOT read it
1329 * without sampling the sequence number in xtime_lock.
1330 * jiffies is defined in the linker script...
1331 */
1332
1333void do_timer(unsigned long ticks)
1334{
1335 jiffies_64 += ticks;
1336 update_wall_time();
1337 calc_global_load(ticks);
1338}
1339
1340#ifdef __ARCH_WANT_SYS_ALARM 1327#ifdef __ARCH_WANT_SYS_ALARM
1341 1328
1342/* 1329/*
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 02:49:34 -0500