.quad sys_epoll_pwait
.quad sys_utimensat /* 475 */
.quad sys_signalfd
- .quad sys_timerfd
+ .quad sys_ni_syscall
.quad sys_eventfd
.size sys_call_table, . - sys_call_table
CALL(sys_kexec_load)
CALL(sys_utimensat)
CALL(sys_signalfd)
-/* 350 */ CALL(sys_timerfd)
+/* 350 */ CALL(sys_ni_syscall)
CALL(sys_eventfd)
CALL(sys_fallocate)
#ifndef syscalls_counted
.long _sys_epoll_pwait
.long _sys_utimensat
.long _sys_signalfd
- .long _sys_timerfd
+ .long _sys_ni_syscall
.long _sys_eventfd /* 350 */
.long _sys_pread64
.long _sys_pwrite64
.long sys_epoll_pwait
.long sys_utimensat /* 320 */
.long sys_signalfd
- .long sys_timerfd
+ .long sys_ni_syscall
.long sys_eventfd
.long sys_fallocate
data8 sys_epoll_pwait // 1305
data8 sys_utimensat
data8 sys_signalfd
- data8 sys_timerfd
+ data8 sys_ni_syscall
data8 sys_eventfd
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls
.long sys_epoll_pwait /* 315 */
.long sys_utimensat
.long sys_signalfd
- .long sys_timerfd
+ .long sys_ni_syscall
.long sys_eventfd
.long sys_fallocate /* 320 */
.long sys_epoll_pwait /* 315 */
.long sys_utimensat
.long sys_signalfd
- .long sys_timerfd
+ .long sys_ni_syscall
.long sys_eventfd
.long sys_fallocate /* 320 */
sys sys_ioprio_get 2 /* 4315 */
sys sys_utimensat 4
sys sys_signalfd 3
- sys sys_timerfd 4
+ sys sys_ni_syscall 0
sys sys_eventfd 1
sys sys_fallocate 6 /* 4320 */
.endm
PTR sys_ioprio_get
PTR sys_utimensat /* 5275 */
PTR sys_signalfd
- PTR sys_timerfd
+ PTR sys_ni_syscall
PTR sys_eventfd
PTR sys_fallocate
.size sys_call_table,.-sys_call_table
PTR sys_ioprio_get
PTR compat_sys_utimensat
PTR compat_sys_signalfd /* 5280 */
- PTR compat_sys_timerfd
+ PTR sys_ni_syscall
PTR sys_eventfd
PTR sys_fallocate
.size sysn32_call_table,.-sysn32_call_table
PTR sys_ioprio_get /* 4315 */
PTR compat_sys_utimensat
PTR compat_sys_signalfd
- PTR compat_sys_timerfd
+ PTR sys_ni_syscall
PTR sys_eventfd
PTR sys32_fallocate /* 4320 */
.size sys_call_table,.-sys_call_table
llgfr %r4,%r4 # compat_size_t
jg compat_sys_signalfd
- .globl compat_sys_timerfd_wrapper
-compat_sys_timerfd_wrapper:
- lgfr %r2,%r2 # int
- lgfr %r3,%r3 # int
- lgfr %r4,%r4 # int
- llgtr %r5,%r5 # struct compat_itimerspec *
- jg compat_sys_timerfd
-
.globl sys_eventfd_wrapper
sys_eventfd_wrapper:
llgfr %r2,%r2 # unsigned int
SYSCALL(s390_fallocate,sys_fallocate,sys_fallocate_wrapper)
SYSCALL(sys_utimensat,sys_utimensat,compat_sys_utimensat_wrapper) /* 315 */
SYSCALL(sys_signalfd,sys_signalfd,compat_sys_signalfd_wrapper)
-SYSCALL(sys_timerfd,sys_timerfd,compat_sys_timerfd_wrapper)
+NI_SYSCALL /* 317 old sys_timer_fd */
SYSCALL(sys_eventfd,sys_eventfd,sys_eventfd_wrapper)
/*295*/ .long sys_fchmodat, sys_faccessat, sys_pselect6, sys_ppoll, sys_unshare
/*300*/ .long sys_set_robust_list, sys_get_robust_list, sys_migrate_pages, sys_mbind, sys_get_mempolicy
/*305*/ .long sys_set_mempolicy, sys_kexec_load, sys_move_pages, sys_getcpu, sys_epoll_pwait
-/*310*/ .long sys_utimensat, sys_signalfd, sys_timerfd, sys_eventfd, sys_fallocate
+/*310*/ .long sys_utimensat, sys_signalfd, sys_ni_syscall, sys_eventfd, sys_fallocate
#ifdef CONFIG_SUNOS_EMUL
/* Now the SunOS syscall table. */
.word sys_fchmodat, sys_faccessat, compat_sys_pselect6, compat_sys_ppoll, sys_unshare
/*300*/ .word compat_sys_set_robust_list, compat_sys_get_robust_list, compat_sys_migrate_pages, compat_sys_mbind, compat_sys_get_mempolicy
.word compat_sys_set_mempolicy, compat_sys_kexec_load, compat_sys_move_pages, sys_getcpu, compat_sys_epoll_pwait
-/*310*/ .word compat_sys_utimensat, compat_sys_signalfd, compat_sys_timerfd, sys_eventfd, compat_sys_fallocate
+/*310*/ .word compat_sys_utimensat, compat_sys_signalfd, sys_ni_syscall, sys_eventfd, compat_sys_fallocate
#endif /* CONFIG_COMPAT */
.word sys_fchmodat, sys_faccessat, sys_pselect6, sys_ppoll, sys_unshare
/*300*/ .word sys_set_robust_list, sys_get_robust_list, sys_migrate_pages, sys_mbind, sys_get_mempolicy
.word sys_set_mempolicy, sys_kexec_load, sys_move_pages, sys_getcpu, sys_epoll_pwait
-/*310*/ .word sys_utimensat, sys_signalfd, sys_timerfd, sys_eventfd, sys_fallocate
+/*310*/ .word sys_utimensat, sys_signalfd, sys_ni_syscall, sys_eventfd, sys_fallocate
#if defined(CONFIG_SUNOS_EMUL) || defined(CONFIG_SOLARIS_EMUL) || \
defined(CONFIG_SOLARIS_EMUL_MODULE)
#ifdef CONFIG_TIMERFD
-asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
- const struct compat_itimerspec __user *utmr)
+asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
+ const struct compat_itimerspec __user *utmr,
+ struct compat_itimerspec __user *otmr)
{
+ int error;
struct itimerspec t;
struct itimerspec __user *ut;
if (get_compat_itimerspec(&t, utmr))
return -EFAULT;
- ut = compat_alloc_user_space(sizeof(*ut));
- if (copy_to_user(ut, &t, sizeof(t)))
+ ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
+ if (copy_to_user(&ut[0], &t, sizeof(t)))
return -EFAULT;
+ error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
+ if (!error && otmr)
+ error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
+ put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
+
+ return error;
+}
+
+asmlinkage long compat_sys_timerfd_gettime(int ufd,
+ struct compat_itimerspec __user *otmr)
+{
+ int error;
+ struct itimerspec t;
+ struct itimerspec __user *ut;
- return sys_timerfd(ufd, clockid, flags, ut);
+ ut = compat_alloc_user_space(sizeof(struct itimerspec));
+ error = sys_timerfd_gettime(ufd, ut);
+ if (!error)
+ error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
+ put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
+
+ return error;
}
#endif /* CONFIG_TIMERFD */
struct hrtimer tmr;
ktime_t tintv;
wait_queue_head_t wqh;
+ u64 ticks;
int expired;
+ int clockid;
};
/*
* This gets called when the timer event triggers. We set the "expired"
* flag, but we do not re-arm the timer (in case it's necessary,
- * tintv.tv64 != 0) until the timer is read.
+ * tintv.tv64 != 0) until the timer is accessed.
*/
static enum hrtimer_restart timerfd_tmrproc(struct hrtimer *htmr)
{
spin_lock_irqsave(&ctx->wqh.lock, flags);
ctx->expired = 1;
+ ctx->ticks++;
wake_up_locked(&ctx->wqh);
spin_unlock_irqrestore(&ctx->wqh.lock, flags);
return HRTIMER_NORESTART;
}
-static void timerfd_setup(struct timerfd_ctx *ctx, int clockid, int flags,
+static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
+{
+ ktime_t now, remaining;
+
+ now = ctx->tmr.base->get_time();
+ remaining = ktime_sub(ctx->tmr.expires, now);
+
+ return remaining.tv64 < 0 ? ktime_set(0, 0): remaining;
+}
+
+static void timerfd_setup(struct timerfd_ctx *ctx, int flags,
const struct itimerspec *ktmr)
{
enum hrtimer_mode htmode;
texp = timespec_to_ktime(ktmr->it_value);
ctx->expired = 0;
+ ctx->ticks = 0;
ctx->tintv = timespec_to_ktime(ktmr->it_interval);
- hrtimer_init(&ctx->tmr, clockid, htmode);
+ hrtimer_init(&ctx->tmr, ctx->clockid, htmode);
ctx->tmr.expires = texp;
ctx->tmr.function = timerfd_tmrproc;
if (texp.tv64 != 0)
poll_wait(file, &ctx->wqh, wait);
spin_lock_irqsave(&ctx->wqh.lock, flags);
- if (ctx->expired)
+ if (ctx->ticks)
events |= POLLIN;
spin_unlock_irqrestore(&ctx->wqh.lock, flags);
return -EINVAL;
spin_lock_irq(&ctx->wqh.lock);
res = -EAGAIN;
- if (!ctx->expired && !(file->f_flags & O_NONBLOCK)) {
+ if (!ctx->ticks && !(file->f_flags & O_NONBLOCK)) {
__add_wait_queue(&ctx->wqh, &wait);
for (res = 0;;) {
set_current_state(TASK_INTERRUPTIBLE);
- if (ctx->expired) {
+ if (ctx->ticks) {
res = 0;
break;
}
__remove_wait_queue(&ctx->wqh, &wait);
__set_current_state(TASK_RUNNING);
}
- if (ctx->expired) {
- ctx->expired = 0;
- if (ctx->tintv.tv64 != 0) {
+ if (ctx->ticks) {
+ ticks = ctx->ticks;
+ if (ctx->expired && ctx->tintv.tv64) {
/*
* If tintv.tv64 != 0, this is a periodic timer that
* needs to be re-armed. We avoid doing it in the timer
* callback to avoid DoS attacks specifying a very
* short timer period.
*/
- ticks = (u64)
- hrtimer_forward(&ctx->tmr,
- hrtimer_cb_get_time(&ctx->tmr),
- ctx->tintv);
+ ticks += hrtimer_forward_now(&ctx->tmr,
+ ctx->tintv) - 1;
hrtimer_restart(&ctx->tmr);
- } else
- ticks = 1;
+ }
+ ctx->expired = 0;
+ ctx->ticks = 0;
}
spin_unlock_irq(&ctx->wqh.lock);
if (ticks)
.read = timerfd_read,
};
-asmlinkage long sys_timerfd(int ufd, int clockid, int flags,
- const struct itimerspec __user *utmr)
+static struct file *timerfd_fget(int fd)
+{
+ struct file *file;
+
+ file = fget(fd);
+ if (!file)
+ return ERR_PTR(-EBADF);
+ if (file->f_op != &timerfd_fops) {
+ fput(file);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return file;
+}
+
+asmlinkage long sys_timerfd_create(int clockid, int flags)
{
- int error;
+ int error, ufd;
struct timerfd_ctx *ctx;
struct file *file;
struct inode *inode;
- struct itimerspec ktmr;
-
- if (copy_from_user(&ktmr, utmr, sizeof(ktmr)))
- return -EFAULT;
+ if (flags)
+ return -EINVAL;
if (clockid != CLOCK_MONOTONIC &&
clockid != CLOCK_REALTIME)
return -EINVAL;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ init_waitqueue_head(&ctx->wqh);
+ ctx->clockid = clockid;
+ hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS);
+
+ error = anon_inode_getfd(&ufd, &inode, &file, "[timerfd]",
+ &timerfd_fops, ctx);
+ if (error) {
+ kfree(ctx);
+ return error;
+ }
+
+ return ufd;
+}
+
+asmlinkage long sys_timerfd_settime(int ufd, int flags,
+ const struct itimerspec __user *utmr,
+ struct itimerspec __user *otmr)
+{
+ struct file *file;
+ struct timerfd_ctx *ctx;
+ struct itimerspec ktmr, kotmr;
+
+ if (copy_from_user(&ktmr, utmr, sizeof(ktmr)))
+ return -EFAULT;
+
if (!timespec_valid(&ktmr.it_value) ||
!timespec_valid(&ktmr.it_interval))
return -EINVAL;
- if (ufd == -1) {
- ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
- if (!ctx)
- return -ENOMEM;
-
- init_waitqueue_head(&ctx->wqh);
-
- timerfd_setup(ctx, clockid, flags, &ktmr);
-
- /*
- * When we call this, the initialization must be complete, since
- * anon_inode_getfd() will install the fd.
- */
- error = anon_inode_getfd(&ufd, &inode, &file, "[timerfd]",
- &timerfd_fops, ctx);
- if (error)
- goto err_tmrcancel;
- } else {
- file = fget(ufd);
- if (!file)
- return -EBADF;
- ctx = file->private_data;
- if (file->f_op != &timerfd_fops) {
- fput(file);
- return -EINVAL;
- }
- /*
- * We need to stop the existing timer before reprogramming
- * it to the new values.
- */
- for (;;) {
- spin_lock_irq(&ctx->wqh.lock);
- if (hrtimer_try_to_cancel(&ctx->tmr) >= 0)
- break;
- spin_unlock_irq(&ctx->wqh.lock);
- cpu_relax();
- }
- /*
- * Re-program the timer to the new value ...
- */
- timerfd_setup(ctx, clockid, flags, &ktmr);
+ file = timerfd_fget(ufd);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+ ctx = file->private_data;
+ /*
+ * We need to stop the existing timer before reprogramming
+ * it to the new values.
+ */
+ for (;;) {
+ spin_lock_irq(&ctx->wqh.lock);
+ if (hrtimer_try_to_cancel(&ctx->tmr) >= 0)
+ break;
spin_unlock_irq(&ctx->wqh.lock);
- fput(file);
+ cpu_relax();
}
- return ufd;
+ /*
+ * If the timer is expired and it's periodic, we need to advance it
+ * because the caller may want to know the previous expiration time.
+ * We do not update "ticks" and "expired" since the timer will be
+ * re-programmed again in the following timerfd_setup() call.
+ */
+ if (ctx->expired && ctx->tintv.tv64)
+ hrtimer_forward_now(&ctx->tmr, ctx->tintv);
-err_tmrcancel:
- hrtimer_cancel(&ctx->tmr);
- kfree(ctx);
- return error;
+ kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx));
+ kotmr.it_interval = ktime_to_timespec(ctx->tintv);
+
+ /*
+ * Re-program the timer to the new value ...
+ */
+ timerfd_setup(ctx, flags, &ktmr);
+
+ spin_unlock_irq(&ctx->wqh.lock);
+ fput(file);
+ if (otmr && copy_to_user(otmr, &kotmr, sizeof(kotmr)))
+ return -EFAULT;
+
+ return 0;
+}
+
+asmlinkage long sys_timerfd_gettime(int ufd, struct itimerspec __user *otmr)
+{
+ struct file *file;
+ struct timerfd_ctx *ctx;
+ struct itimerspec kotmr;
+
+ file = timerfd_fget(ufd);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+ ctx = file->private_data;
+
+ spin_lock_irq(&ctx->wqh.lock);
+ if (ctx->expired && ctx->tintv.tv64) {
+ ctx->expired = 0;
+ ctx->ticks +=
+ hrtimer_forward_now(&ctx->tmr, ctx->tintv) - 1;
+ hrtimer_restart(&ctx->tmr);
+ }
+ kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx));
+ kotmr.it_interval = ktime_to_timespec(ctx->tintv);
+ spin_unlock_irq(&ctx->wqh.lock);
+ fput(file);
+
+ return copy_to_user(otmr, &kotmr, sizeof(kotmr)) ? -EFAULT: 0;
}
COMPAT_SYS(epoll_pwait)
COMPAT_SYS_SPU(utimensat)
COMPAT_SYS_SPU(signalfd)
-COMPAT_SYS_SPU(timerfd)
+SYSCALL(ni_syscall)
SYSCALL_SPU(eventfd)
COMPAT_SYS_SPU(sync_file_range2)
COMPAT_SYS(fallocate)
asmlinkage long compat_sys_signalfd(int ufd,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
-asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
- const struct compat_itimerspec __user *utmr);
+asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
+ const struct compat_itimerspec __user *utmr,
+ struct compat_itimerspec __user *otmr);
+asmlinkage long compat_sys_timerfd_gettime(int ufd,
+ struct compat_itimerspec __user *otmr);
#endif /* CONFIG_COMPAT */
#endif /* _LINUX_COMPAT_H */
}
/* Forward a hrtimer so it expires after now: */
-extern unsigned long
+extern u64
hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval);
/* Forward a hrtimer so it expires after the hrtimer's current now */
-static inline unsigned long hrtimer_forward_now(struct hrtimer *timer,
- ktime_t interval)
+static inline u64 hrtimer_forward_now(struct hrtimer *timer,
+ ktime_t interval)
{
return hrtimer_forward(timer, timer->base->get_time(), interval);
}
extern void __init hrtimers_init(void);
#if BITS_PER_LONG < 64
-extern unsigned long ktime_divns(const ktime_t kt, s64 div);
+extern u64 ktime_divns(const ktime_t kt, s64 div);
#else /* BITS_PER_LONG < 64 */
-# define ktime_divns(kt, div) (unsigned long)((kt).tv64 / (div))
+# define ktime_divns(kt, div) (u64)((kt).tv64 / (div))
#endif
/* Show pending timers: */
size_t len);
asmlinkage long sys_getcpu(unsigned __user *cpu, unsigned __user *node, struct getcpu_cache __user *cache);
asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemask);
-asmlinkage long sys_timerfd(int ufd, int clockid, int flags,
- const struct itimerspec __user *utmr);
+asmlinkage long sys_timerfd_create(int clockid, int flags);
+asmlinkage long sys_timerfd_settime(int ufd, int flags,
+ const struct itimerspec __user *utmr,
+ struct itimerspec __user *otmr);
+asmlinkage long sys_timerfd_gettime(int ufd, struct itimerspec __user *otmr);
asmlinkage long sys_eventfd(unsigned int count);
asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
/*
* Divide a ktime value by a nanosecond value
*/
-unsigned long ktime_divns(const ktime_t kt, s64 div)
+u64 ktime_divns(const ktime_t kt, s64 div)
{
u64 dclc, inc, dns;
int sft = 0;
dclc >>= sft;
do_div(dclc, (unsigned long) div);
- return (unsigned long) dclc;
+ return dclc;
}
#endif /* BITS_PER_LONG >= 64 */
* Forward the timer expiry so it will expire in the future.
* Returns the number of overruns.
*/
-unsigned long
-hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval)
+u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval)
{
- unsigned long orun = 1;
+ u64 orun = 1;
ktime_t delta;
delta = ktime_sub(now, timer->expires);
if (timr->it.real.interval.tv64 == 0)
return;
- timr->it_overrun += hrtimer_forward(timer, timer->base->get_time(),
- timr->it.real.interval);
+ timr->it_overrun += (unsigned int) hrtimer_forward(timer,
+ timer->base->get_time(),
+ timr->it.real.interval);
timr->it_overrun_last = timr->it_overrun;
timr->it_overrun = -1;
now = ktime_add(now, kj);
}
#endif
- timr->it_overrun +=
+ timr->it_overrun += (unsigned int)
hrtimer_forward(timer, now,
timr->it.real.interval);
ret = HRTIMER_RESTART;
*/
if (iv.tv64 && (timr->it_requeue_pending & REQUEUE_PENDING ||
(timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE))
- timr->it_overrun += hrtimer_forward(timer, now, iv);
+ timr->it_overrun += (unsigned int) hrtimer_forward(timer, now, iv);
remaining = ktime_sub(timer->expires, now);
/* Return 0 only, when the timer is expired and not pending */
/* New file descriptors */
cond_syscall(sys_signalfd);
-cond_syscall(sys_timerfd);
cond_syscall(compat_sys_signalfd);
-cond_syscall(compat_sys_timerfd);
+cond_syscall(sys_timerfd_create);
+cond_syscall(sys_timerfd_settime);
+cond_syscall(sys_timerfd_gettime);
+cond_syscall(compat_sys_timerfd_settime);
+cond_syscall(compat_sys_timerfd_gettime);
cond_syscall(sys_eventfd);
projects / linux-2.6 / commitdiff