diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-15 18:53:35 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-15 18:53:35 -0700 |
commit | 420c1c572d4ceaa2f37b6311b7017ac6cf049fe2 (patch) | |
tree | df04e6b4b756b7a46d9887462d54a3ad0e1f91d5 /kernel | |
parent | 9620639b7ea3843983f4ced8b4c81eb4d8974838 (diff) | |
parent | 6e6823d17b157f185be09f4c70181299f9273f0b (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.c | 136 | ||||
-rw-r--r-- | kernel/hrtimer.c | 84 | ||||
-rw-r--r-- | kernel/posix-cpu-timers.c | 110 | ||||
-rw-r--r-- | kernel/posix-timers.c | 342 | ||||
-rw-r--r-- | kernel/time.c | 20 | ||||
-rw-r--r-- | kernel/time/Makefile | 3 | ||||
-rw-r--r-- | kernel/time/clockevents.c | 1 | ||||
-rw-r--r-- | kernel/time/jiffies.c | 20 | ||||
-rw-r--r-- | kernel/time/ntp.c | 13 | ||||
-rw-r--r-- | kernel/time/posix-clock.c | 451 | ||||
-rw-r--r-- | kernel/time/tick-broadcast.c | 1 | ||||
-rw-r--r-- | kernel/time/tick-common.c | 1 | ||||
-rw-r--r-- | kernel/time/tick-internal.h | 9 | ||||
-rw-r--r-- | kernel/time/tick-oneshot.c | 1 | ||||
-rw-r--r-- | kernel/time/tick-sched.c | 1 | ||||
-rw-r--r-- | kernel/time/timekeeping.c | 141 | ||||
-rw-r--r-- | kernel/timer.c | 13 |
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, put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; } +static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) +{ + memset(txc, 0, sizeof(struct timex)); + + if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || + __get_user(txc->modes, &utp->modes) || + __get_user(txc->offset, &utp->offset) || + __get_user(txc->freq, &utp->freq) || + __get_user(txc->maxerror, &utp->maxerror) || + __get_user(txc->esterror, &utp->esterror) || + __get_user(txc->status, &utp->status) || + __get_user(txc->constant, &utp->constant) || + __get_user(txc->precision, &utp->precision) || + __get_user(txc->tolerance, &utp->tolerance) || + __get_user(txc->time.tv_sec, &utp->time.tv_sec) || + __get_user(txc->time.tv_usec, &utp->time.tv_usec) || + __get_user(txc->tick, &utp->tick) || + __get_user(txc->ppsfreq, &utp->ppsfreq) || + __get_user(txc->jitter, &utp->jitter) || + __get_user(txc->shift, &utp->shift) || + __get_user(txc->stabil, &utp->stabil) || + __get_user(txc->jitcnt, &utp->jitcnt) || + __get_user(txc->calcnt, &utp->calcnt) || + __get_user(txc->errcnt, &utp->errcnt) || + __get_user(txc->stbcnt, &utp->stbcnt)) + return -EFAULT; + + return 0; +} + +static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) +{ + if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || + __put_user(txc->modes, &utp->modes) || + __put_user(txc->offset, &utp->offset) || + __put_user(txc->freq, &utp->freq) || + __put_user(txc->maxerror, &utp->maxerror) || + __put_user(txc->esterror, &utp->esterror) || + __put_user(txc->status, &utp->status) || + __put_user(txc->constant, &utp->constant) || + __put_user(txc->precision, &utp->precision) || + __put_user(txc->tolerance, &utp->tolerance) || + __put_user(txc->time.tv_sec, &utp->time.tv_sec) || + __put_user(txc->time.tv_usec, &utp->time.tv_usec) || + __put_user(txc->tick, &utp->tick) || + __put_user(txc->ppsfreq, &utp->ppsfreq) || + __put_user(txc->jitter, &utp->jitter) || + __put_user(txc->shift, &utp->shift) || + __put_user(txc->stabil, &utp->stabil) || + __put_user(txc->jitcnt, &utp->jitcnt) || + __put_user(txc->calcnt, &utp->calcnt) || + __put_user(txc->errcnt, &utp->errcnt) || + __put_user(txc->stbcnt, &utp->stbcnt) || + __put_user(txc->tai, &utp->tai)) + return -EFAULT; + return 0; +} + asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { @@ -617,6 +675,29 @@ long compat_sys_clock_gettime(clockid_t which_clock, return err; } +long compat_sys_clock_adjtime(clockid_t which_clock, + struct compat_timex __user *utp) +{ + struct timex txc; + mm_segment_t oldfs; + int err, ret; + + err = compat_get_timex(&txc, utp); + if (err) + return err; + + oldfs = get_fs(); + set_fs(KERNEL_DS); + ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); + set_fs(oldfs); + + err = compat_put_timex(utp, &txc); + if (err) + return err; + + return ret; +} + long compat_sys_clock_getres(clockid_t which_clock, struct compat_timespec __user *tp) { @@ -951,58 +1032,17 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) { struct timex txc; - int ret; - - memset(&txc, 0, sizeof(struct timex)); + int err, ret; - if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || - __get_user(txc.modes, &utp->modes) || - __get_user(txc.offset, &utp->offset) || - __get_user(txc.freq, &utp->freq) || - __get_user(txc.maxerror, &utp->maxerror) || - __get_user(txc.esterror, &utp->esterror) || - __get_user(txc.status, &utp->status) || - __get_user(txc.constant, &utp->constant) || - __get_user(txc.precision, &utp->precision) || - __get_user(txc.tolerance, &utp->tolerance) || - __get_user(txc.time.tv_sec, &utp->time.tv_sec) || - __get_user(txc.time.tv_usec, &utp->time.tv_usec) || - __get_user(txc.tick, &utp->tick) || - __get_user(txc.ppsfreq, &utp->ppsfreq) || - __get_user(txc.jitter, &utp->jitter) || - __get_user(txc.shift, &utp->shift) || - __get_user(txc.stabil, &utp->stabil) || - __get_user(txc.jitcnt, &utp->jitcnt) || - __get_user(txc.calcnt, &utp->calcnt) || - __get_user(txc.errcnt, &utp->errcnt) || - __get_user(txc.stbcnt, &utp->stbcnt)) - return -EFAULT; + err = compat_get_timex(&txc, utp); + if (err) + return err; ret = do_adjtimex(&txc); - if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || - __put_user(txc.modes, &utp->modes) || - __put_user(txc.offset, &utp->offset) || - __put_user(txc.freq, &utp->freq) || - __put_user(txc.maxerror, &utp->maxerror) || - __put_user(txc.esterror, &utp->esterror) || - __put_user(txc.status, &utp->status) || - __put_user(txc.constant, &utp->constant) || - __put_user(txc.precision, &utp->precision) || - __put_user(txc.tolerance, &utp->tolerance) || - __put_user(txc.time.tv_sec, &utp->time.tv_sec) || - __put_user(txc.time.tv_usec, &utp->time.tv_usec) || - __put_user(txc.tick, &utp->tick) || - __put_user(txc.ppsfreq, &utp->ppsfreq) || - __put_user(txc.jitter, &utp->jitter) || - __put_user(txc.shift, &utp->shift) || - __put_user(txc.stabil, &utp->stabil) || - __put_user(txc.jitcnt, &utp->jitcnt) || - __put_user(txc.calcnt, &utp->calcnt) || - __put_user(txc.errcnt, &utp->errcnt) || - __put_user(txc.stbcnt, &utp->stbcnt) || - __put_user(txc.tai, &utp->tai)) - ret = -EFAULT; + err = compat_put_timex(utp, &txc); + if (err) + return err; return ret; } 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 @@ /* * The timer bases: * - * Note: If we want to add new timer bases, we have to skip the two - * clock ids captured by the cpu-timers. We do this by holding empty - * entries rather than doing math adjustment of the clock ids. - * This ensures that we capture erroneous accesses to these clock ids - * rather than moving them into the range of valid clock id's. + * There are more clockids then hrtimer bases. Thus, we index + * into the timer bases by the hrtimer_base_type enum. When trying + * to reach a base using a clockid, hrtimer_clockid_to_base() + * is used to convert from clockid to the proper hrtimer_base_type. */ DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) = { @@ -74,30 +73,39 @@ DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) = .get_time = &ktime_get, .resolution = KTIME_LOW_RES, }, + { + .index = CLOCK_BOOTTIME, + .get_time = &ktime_get_boottime, + .resolution = KTIME_LOW_RES, + }, } }; +static int hrtimer_clock_to_base_table[MAX_CLOCKS]; + +static inline int hrtimer_clockid_to_base(clockid_t clock_id) +{ + return hrtimer_clock_to_base_table[clock_id]; +} + + /* * Get the coarse grained time at the softirq based on xtime and * wall_to_monotonic. */ static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base) { - ktime_t xtim, tomono; - struct timespec xts, tom; - unsigned long seq; + ktime_t xtim, mono, boot; + struct timespec xts, tom, slp; - do { - seq = read_seqbegin(&xtime_lock); - xts = __current_kernel_time(); - tom = __get_wall_to_monotonic(); - } while (read_seqretry(&xtime_lock, seq)); + get_xtime_and_monotonic_and_sleep_offset(&xts, &tom, &slp); xtim = timespec_to_ktime(xts); - tomono = timespec_to_ktime(tom); - base->clock_base[CLOCK_REALTIME].softirq_time = xtim; - base->clock_base[CLOCK_MONOTONIC].softirq_time = - ktime_add(xtim, tomono); + mono = ktime_add(xtim, timespec_to_ktime(tom)); + boot = ktime_add(mono, timespec_to_ktime(slp)); + base->clock_base[HRTIMER_BASE_REALTIME].softirq_time = xtim; + base->clock_base[HRTIMER_BASE_MONOTONIC].softirq_time = mono; + base->clock_base[HRTIMER_BASE_BOOTTIME].softirq_time = boot; } /* @@ -184,10 +192,11 @@ switch_hrtimer_base(struct hrtimer *timer, struct hrtimer_clock_base *base, struct hrtimer_cpu_base *new_cpu_base; int this_cpu = smp_processor_id(); int cpu = hrtimer_get_target(this_cpu, pinned); + int basenum = hrtimer_clockid_to_base(base->index); again: new_cpu_base = &per_cpu(hrtimer_bases, cpu); - new_base = &new_cpu_base->clock_base[base->index]; + new_base = &new_cpu_base->clock_base[basenum]; if (base != new_base) { /* @@ -617,24 +626,23 @@ static int hrtimer_reprogram(struct hrtimer *timer, static void retrigger_next_event(void *arg) { struct hrtimer_cpu_base *base; - struct timespec realtime_offset, wtm; - unsigned long seq; + struct timespec realtime_offset, wtm, sleep; if (!hrtimer_hres_active()) return; - do { - seq = read_seqbegin(&xtime_lock); - wtm = __get_wall_to_monotonic(); - } while (read_seqretry(&xtime_lock, seq)); + get_xtime_and_monotonic_and_sleep_offset(&realtime_offset, &wtm, + &sleep); set_normalized_timespec(&realtime_offset, -wtm.tv_sec, -wtm.tv_nsec); base = &__get_cpu_var(hrtimer_bases); /* Adjust CLOCK_REALTIME offset */ raw_spin_lock(&base->lock); - base->clock_base[CLOCK_REALTIME].offset = + base->clock_base[HRTIMER_BASE_REALTIME].offset = timespec_to_ktime(realtime_offset); + base->clock_base[HRTIMER_BASE_BOOTTIME].offset = + timespec_to_ktime(sleep); hrtimer_force_reprogram(base, 0); raw_spin_unlock(&base->lock); @@ -679,14 +687,6 @@ static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) } /* - * Initialize the high resolution related parts of a hrtimer - */ -static inline void hrtimer_init_timer_hres(struct hrtimer *timer) -{ -} - - -/* * When High resolution timers are active, try to reprogram. Note, that in case * the state has HRTIMER_STATE_CALLBACK set, no reprogramming and no expiry * check happens. The timer gets enqueued into the rbtree. The reprogramming @@ -731,8 +731,9 @@ static int hrtimer_switch_to_hres(void) return 0; } base->hres_active = 1; - base->clock_base[CLOCK_REALTIME].resolution = KTIME_HIGH_RES; - base->clock_base[CLOCK_MONOTONIC].resolution = KTIME_HIGH_RES; + base->clock_base[HRTIMER_BASE_REALTIME].resolution = KTIME_HIGH_RES; + base->clock_base[HRTIMER_BASE_MONOTONIC].resolution = KTIME_HIGH_RES; + base->clock_base[HRTIMER_BASE_BOOTTIME].resolution = KTIME_HIGH_RES; tick_setup_sched_timer(); @@ -756,7 +757,6 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer, return 0; } static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { } -static inline void hrtimer_init_timer_hres(struct hrtimer *timer) { } #endif /* CONFIG_HIGH_RES_TIMERS */ @@ -1127,6 +1127,7 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id, enum hrtimer_mode mode) { struct hrtimer_cpu_base *cpu_base; + int base; memset(timer, 0, sizeof(struct hrtimer)); @@ -1135,8 +1136,8 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id, if (clock_id == CLOCK_REALTIME && mode != HRTIMER_MODE_ABS) clock_id = CLOCK_MONOTONIC; - timer->base = &cpu_base->clock_base[clock_id]; - hrtimer_init_timer_hres(timer); + base = hrtimer_clockid_to_base(clock_id); + timer->base = &cpu_base->clock_base[base]; timerqueue_init(&timer->node); #ifdef CONFIG_TIMER_STATS @@ -1171,9 +1172,10 @@ EXPORT_SYMBOL_GPL(hrtimer_init); int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp) { struct hrtimer_cpu_base *cpu_base; + int base = hrtimer_clockid_to_base(which_clock); cpu_base = &__raw_get_cpu_var(hrtimer_bases); - *tp = ktime_to_timespec(cpu_base->clock_base[which_clock].resolution); + *tp = ktime_to_timespec(cpu_base->clock_base[base].resolution); return 0; } @@ -1720,6 +1722,10 @@ static struct notifier_block __cpuinitdata hrtimers_nb = { void __init hrtimers_init(void) { + hrtimer_clock_to_base_table[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME; + hrtimer_clock_to_base_table[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC; + hrtimer_clock_to_base_table[CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME; + hrtimer_cpu_notify(&hrtimers_nb, (unsigned long)CPU_UP_PREPARE, (void *)(long)smp_processor_id()); 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) return p->utime; } -int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp) +static int +posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp) { int error = check_clock(which_clock); if (!error) { @@ -194,7 +195,8 @@ int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *tp) return error; } -int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp) +static int +posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *tp) { /* * 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, } -int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp) +static int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp) { const pid_t pid = CPUCLOCK_PID(which_clock); int error = -EINVAL; @@ -379,7 +381,7 @@ int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp) * This is called from sys_timer_create() and do_cpu_nanosleep() with the * new timer already all-zeros initialized. */ -int posix_cpu_timer_create(struct k_itimer *new_timer) +static int posix_cpu_timer_create(struct k_itimer *new_timer) { int ret = 0; const pid_t pid = CPUCLOCK_PID(new_timer->it_clock); @@ -425,7 +427,7 @@ int posix_cpu_timer_create(struct k_itimer *new_timer) * If we return TIMER_RETRY, it's necessary to release the timer's lock * and try again. (This happens when the timer is in the middle of firing.) */ -int posix_cpu_timer_del(struct k_itimer *timer) +static int posix_cpu_timer_del(struct k_itimer *timer) { struct task_struct *p = timer->it.cpu.task; int ret = 0; @@ -665,8 +667,8 @@ static int cpu_timer_sample_group(const clockid_t which_clock, * If we return TIMER_RETRY, it's necessary to release the timer's lock * and try again. (This happens when the timer is in the middle of firing.) */ -int posix_cpu_timer_set(struct k_itimer *timer, int flags, - struct itimerspec *new, struct itimerspec *old) +static int posix_cpu_timer_set(struct k_itimer *timer, int flags, + struct itimerspec *new, struct itimerspec *old) { struct task_struct *p = timer->it.cpu.task; 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, return ret; } -void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) +static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp) { union cpu_time_count now; struct task_struct *p = timer->it.cpu.task; @@ -1481,11 +1483,13 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, return error; } -int posix_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec *rqtp, struct timespec __user *rmtp) +static long posix_cpu_nsleep_restart(struct restart_block *restart_block); + +static int posix_cpu_nsleep(const clockid_t which_clock, int flags, + struct timespec *rqtp, struct timespec __user *rmtp) { struct restart_block *restart_block = - ¤t_thread_info()->restart_block; + ¤t_thread_info()->restart_block; struct itimerspec it; int error; @@ -1501,56 +1505,47 @@ int posix_cpu_nsleep(const clockid_t which_clock, int flags, if (error == -ERESTART_RESTARTBLOCK) { - if (flags & TIMER_ABSTIME) + if (flags & TIMER_ABSTIME) return -ERESTARTNOHAND; /* - * Report back to the user the time still remaining. - */ - if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp)) + * Report back to the user the time still remaining. + */ + if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp)) return -EFAULT; restart_block->fn = posix_cpu_nsleep_restart; - restart_block->arg0 = which_clock; - restart_block->arg1 = (unsigned long) rmtp; - restart_block->arg2 = rqtp->tv_sec; - restart_block->arg3 = rqtp->tv_nsec; + restart_block->nanosleep.index = which_clock; + restart_block->nanosleep.rmtp = rmtp; + restart_block->nanosleep.expires = timespec_to_ns(rqtp); } return error; } -long posix_cpu_nsleep_restart(struct restart_block *restart_block) +static long posix_cpu_nsleep_restart(struct restart_block *restart_block) { - clockid_t which_clock = restart_block->arg0; - struct timespec __user *rmtp; + clockid_t which_clock = restart_block->nanosleep.index; struct timespec t; struct itimerspec it; int error; - rmtp = (struct timespec __user *) restart_block->arg1; - t.tv_sec = restart_block->arg2; - t.tv_nsec = restart_block->arg3; + t = ns_to_timespec(restart_block->nanosleep.expires); - restart_block->fn = do_no_restart_syscall; error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it); if (error == -ERESTART_RESTARTBLOCK) { + struct timespec __user *rmtp = restart_block->nanosleep.rmtp; /* - * Report back to the user the time still remaining. - */ - if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp)) + * Report back to the user the time still remaining. + */ + if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp)) return -EFAULT; - restart_block->fn = posix_cpu_nsleep_restart; - restart_block->arg0 = which_clock; - restart_block->arg1 = (unsigned long) rmtp; - restart_block->arg2 = t.tv_sec; - restart_block->arg3 = t.tv_nsec; + restart_block->nanosleep.expires = timespec_to_ns(&t); } return error; } - #define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED) #define THREAD_CLOCK MAKE_THREAD_CPUCLOCK(0, CPUCLOCK_SCHED) @@ -1594,38 +1589,37 @@ static int thread_cpu_timer_create(struct k_itimer *timer) timer->it_clock = THREAD_CLOCK; return posix_cpu_timer_create(timer); } -static int thread_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec *rqtp, struct timespec __user *rmtp) -{ - return -EINVAL; -} -static long thread_cpu_nsleep_restart(struct restart_block *restart_block) -{ - return -EINVAL; -} + +struct k_clock clock_posix_cpu = { + .clock_getres = posix_cpu_clock_getres, + .clock_set = posix_cpu_clock_set, + .clock_get = posix_cpu_clock_get, + .timer_create = posix_cpu_timer_create, + .nsleep = posix_cpu_nsleep, + .nsleep_restart = posix_cpu_nsleep_restart, + .timer_set = posix_cpu_timer_set, + .timer_del = posix_cpu_timer_del, + .timer_get = posix_cpu_timer_get, +}; static __init int init_posix_cpu_timers(void) { struct k_clock process = { - .clock_getres = process_cpu_clock_getres, - .clock_get = process_cpu_clock_get, - .clock_set = do_posix_clock_nosettime, - .timer_create = process_cpu_timer_create, - .nsleep = process_cpu_nsleep, - .nsleep_restart = process_cpu_nsleep_restart, + .clock_getres = process_cpu_clock_getres, + .clock_get = process_cpu_clock_get, + .timer_create = process_cpu_timer_create, + .nsleep = process_cpu_nsleep, + .nsleep_restart = process_cpu_nsleep_restart, }; struct k_clock thread = { - .clock_getres = thread_cpu_clock_getres, - .clock_get = thread_cpu_clock_get, - .clock_set = do_posix_clock_nosettime, - .timer_create = thread_cpu_timer_create, - .nsleep = thread_cpu_nsleep, - .nsleep_restart = thread_cpu_nsleep_restart, + .clock_getres = thread_cpu_clock_getres, + .clock_get = thread_cpu_clock_get, + .timer_create = thread_cpu_timer_create, }; struct timespec ts; - register_posix_clock(CLOCK_PROCESS_CPUTIME_ID, &process); - register_posix_clock(CLOCK_THREAD_CPUTIME_ID, &thread); + posix_timers_register_clock(CLOCK_PROCESS_CPUTIME_ID, &process); + posix_timers_register_clock(CLOCK_THREAD_CPUTIME_ID, &thread); cputime_to_timespec(cputime_one_jiffy, &ts); 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 @@ #include <linux/init.h> #include <linux/compiler.h> #include <linux/idr.h> +#include <linux/posix-clock.h> #include <linux/posix-timers.h> #include <linux/syscalls.h> #include <linux/wait.h> @@ -81,6 +82,14 @@ static DEFINE_SPINLOCK(idr_lock); #error "SIGEV_THREAD_ID must not share bit with other SIGEV values!" #endif +/* + * parisc wants ENOTSUP instead of EOPNOTSUPP + */ +#ifndef ENOTSUP +# define ENANOSLEEP_NOTSUP EOPNOTSUPP +#else +# define ENANOSLEEP_NOTSUP ENOTSUP +#endif /* * The timer ID is turned into a timer address by idr_find(). @@ -94,11 +103,7 @@ static DEFINE_SPINLOCK(idr_lock); /* * CLOCKs: The POSIX standard calls for a couple of clocks and allows us * to implement others. This structure defines the various - * clocks and allows the possibility of adding others. We - * provide an interface to add clocks to the table and expect - * the "arch" code to add at least one clock that is high - * resolution. Here we define the standard CLOCK_REALTIME as a - * 1/HZ resolution clock. + * clocks. * * RESOLUTION: Clock resolution is used to round up timer and interval * times, NOT to report clock times, which are reported with as @@ -108,20 +113,13 @@ static DEFINE_SPINLOCK(idr_lock); * necessary code is written. The standard says we should say * something about this issue in the documentation... * - * FUNCTIONS: The CLOCKs structure defines possible functions to handle - * various clock functions. For clocks that use the standard - * system timer code these entries should be NULL. This will - * allow dispatch without the overhead of indirect function - * calls. CLOCKS that depend on other sources (e.g. WWV or GPS) - * must supply functions here, even if the function just returns - * ENOSYS. The standard POSIX timer management code assumes the - * following: 1.) The k_itimer struct (sched.h) is used for the - * timer. 2.) The list, it_lock, it_clock, it_id and it_pid - * fields are not modified by timer code. + * FUNCTIONS: The CLOCKs structure defines possible functions to + * handle various clock functions. * - * At this time all functions EXCEPT clock_nanosleep can be - * redirected by the CLOCKS structure. Clock_nanosleep is in - * there, but the code ignores it. + * The standard POSIX timer management code assumes the + * following: 1.) The k_itimer struct (sched.h) is used for + * the timer. 2.) The list, it_lock, it_clock, it_id and + * it_pid fields are not modified by timer code. * * Permissions: It is assumed that the clock_settime() function defined * for each clock will take care of permission checks. Some @@ -138,6 +136,7 @@ static struct k_clock posix_clocks[MAX_CLOCKS]; */ static int common_nsleep(const clockid_t, int flags, struct timespec *t, struct timespec __user *rmtp); +static int common_timer_create(struct k_itimer *new_timer); static void common_timer_get(struct k_itimer *, struct itimerspec *); static int common_timer_set(struct k_itimer *, int, struct itimerspec *, struct itimerspec *); @@ -158,76 +157,24 @@ static inline void unlock_timer(struct k_itimer *timr, unsigned long flags) spin_unlock_irqrestore(&timr->it_lock, flags); } -/* - * Call the k_clock hook function if non-null, or the default function. - */ -#define CLOCK_DISPATCH(clock, call, arglist) \ - ((clock) < 0 ? posix_cpu_##call arglist : \ - (posix_clocks[clock].call != NULL \ - ? (*posix_clocks[clock].call) arglist : common_##call arglist)) - -/* - * Default clock hook functions when the struct k_clock passed - * to register_posix_clock leaves a function pointer null. - * - * The function common_CALL is the default implementation for - * the function pointer CALL in struct k_clock. - */ - -static inline int common_clock_getres(const clockid_t which_clock, - struct timespec *tp) -{ - tp->tv_sec = 0; - tp->tv_nsec = posix_clocks[which_clock].res; - return 0; -} - -/* - * Get real time for posix timers - */ -static int common_clock_get(clockid_t which_clock, struct timespec *tp) +/* Get clock_realtime */ +static int posix_clock_realtime_get(clockid_t which_clock, struct timespec *tp) { ktime_get_real_ts(tp); return 0; } -static inline int common_clock_set(const clockid_t which_clock, - struct timespec *tp) +/* Set clock_realtime */ +static int posix_clock_realtime_set(const clockid_t which_clock, + const struct timespec *tp) { return do_sys_settimeofday(tp, NULL); } -static int common_timer_create(struct k_itimer *new_timer) -{ - hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0); - return 0; -} - -static int no_timer_create(struct k_itimer *new_timer) -{ - return -EOPNOTSUPP; -} - -static int no_nsleep(const clockid_t which_clock, int flags, - struct timespec *tsave, struct timespec __user *rmtp) -{ - return -EOPNOTSUPP; -} - -/* - * Return nonzero if we know a priori this clockid_t value is bogus. - */ -static inline int invalid_clockid(const clockid_t which_clock) +static int posix_clock_realtime_adj(const clockid_t which_clock, + struct timex *t) { - if (which_clock < 0) /* CPU clock, posix_cpu_* will check it */ - return 0; - if ((unsigned) which_clock >= MAX_CLOCKS) - return 1; - if (posix_clocks[which_clock].clock_getres != NULL) - return 0; - if (posix_clocks[which_clock].res != 0) - return 0; - return 1; + return do_adjtimex(t); } /* @@ -240,7 +187,7 @@ static int posix_ktime_get_ts(clockid_t which_clock, struct timespec *tp) } /* - * Get monotonic time for posix timers + * Get monotonic-raw time for posix timers */ static int posix_get_monotonic_raw(clockid_t which_clock, struct timespec *tp) { @@ -267,46 +214,70 @@ static int posix_get_coarse_res(const clockid_t which_clock, struct timespec *tp *tp = ktime_to_timespec(KTIME_LOW_RES); return 0; } + +static int posix_get_boottime(const clockid_t which_clock, struct timespec *tp) +{ + get_monotonic_boottime(tp); + return 0; +} + + /* * Initialize everything, well, just everything in Posix clocks/timers ;) */ static __init int init_posix_timers(void) { struct k_clock clock_realtime = { - .clock_getres = hrtimer_get_res, + .clock_getres = hrtimer_get_res, + .clock_get = posix_clock_realtime_get, + .clock_set = posix_clock_realtime_set, + .clock_adj = posix_clock_realtime_adj, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, }; struct k_clock clock_monotonic = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_ktime_get_ts, - .clock_set = do_posix_clock_nosettime, + .clock_getres = hrtimer_get_res, + .clock_get = posix_ktime_get_ts, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, }; struct k_clock clock_monotonic_raw = { - .clock_getres = hrtimer_get_res, - .clock_get = posix_get_monotonic_raw, - .clock_set = do_posix_clock_nosettime, - .timer_create = no_timer_create, - .nsleep = no_nsleep, + .clock_getres = hrtimer_get_res, + .clock_get = posix_get_monotonic_raw, }; struct k_clock clock_realtime_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_realtime_coarse, - .clock_set = do_posix_clock_nosettime, - .timer_create = no_timer_create, - .nsleep = no_nsleep, + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_realtime_coarse, }; struct k_clock clock_monotonic_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_monotonic_coarse, - .clock_set = do_posix_clock_nosettime, - .timer_create = no_timer_create, - .nsleep = no_nsleep, + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_monotonic_coarse, + }; + struct k_clock clock_boottime = { + .clock_getres = hrtimer_get_res, + .clock_get = posix_get_boottime, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, }; - register_posix_clock(CLOCK_REALTIME, &clock_realtime); - register_posix_clock(CLOCK_MONOTONIC, &clock_monotonic); - register_posix_clock(CLOCK_MONOTONIC_RAW, &clock_monotonic_raw); - register_posix_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse); - register_posix_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse); + posix_timers_register_clock(CLOCK_REALTIME, &clock_realtime); + posix_timers_register_clock(CLOCK_MONOTONIC, &clock_monotonic); + posix_timers_register_clock(CLOCK_MONOTONIC_RAW, &clock_monotonic_raw); + posix_timers_register_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse); + posix_timers_register_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse); + posix_timers_register_clock(CLOCK_BOOTTIME, &clock_boottime); posix_timers_cache = kmem_cache_create("posix_timers_cache", sizeof (struct k_itimer), 0, SLAB_PANIC, @@ -482,17 +453,29 @@ static struct pid *good_sigevent(sig |