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timerfd: new timerfd API

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This is the new timerfd API as it is implemented by the following patch:

int timerfd_create(int clockid, int flags);
int timerfd_settime(int ufd, int flags,
		    const struct itimerspec *utmr,
		    struct itimerspec *otmr);
int timerfd_gettime(int ufd, struct itimerspec *otmr);

The timerfd_create() API creates an un-programmed timerfd fd.  The "clockid"
parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME.

The timerfd_settime() API give new settings by the timerfd fd, by optionally
retrieving the previous expiration time (in case the "otmr" parameter is not
NULL).

The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit
is set in the "flags" parameter.  Otherwise it's a relative time.

The timerfd_gettime() API returns the next expiration time of the timer, or
{0, 0} if the timerfd has not been set yet.

Like the previous timerfd API implementation, read(2) and poll(2) are
supported (with the same interface).  Here's a simple test program I used to
exercise the new timerfd APIs:

http://www.xmailserver.org/timerfd-test2.c

[akpm@linux-foundation.org: coding-style cleanups]
[akpm@linux-foundation.org: fix ia64 build]
[akpm@linux-foundation.org: fix m68k build]
[akpm@linux-foundation.org: fix mips build]
[akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds]
[heiko.carstens@de.ibm.com: fix s390]
[akpm@linux-foundation.org: fix powerpc build]
[akpm@linux-foundation.org: fix sparc64 more]
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Davide Libenzi 2008-02-04 22:27:26 -08:00 committed by Linus Torvalds
parent 5e05ad7d4e
commit 4d672e7ac7
24 changed files with 210 additions and 118 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/alpha/kernel/systbls.S
View File

@ -495,7 +495,7 @@ sys_call_table:
.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

2
arch/arm/kernel/calls.S
View File

@ -359,7 +359,7 @@
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

2
arch/blackfin/mach-common/entry.S
View File

@ -1373,7 +1373,7 @@ ENTRY(_sys_call_table)
.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

2
arch/cris/arch-v10/kernel/entry.S
View File

@ -1167,7 +1167,7 @@ sys_call_table:
.long sys_epoll_pwait
.long sys_utimensat /* 320 */
.long sys_signalfd
.long sys_timerfd
.long sys_ni_syscall
.long sys_eventfd
.long sys_fallocate

2
arch/ia64/kernel/entry.S
View File

@ -1586,7 +1586,7 @@ sys_call_table:
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

2
arch/m68k/kernel/entry.S
View File

@ -742,7 +742,7 @@ sys_call_table:
.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 */

2
arch/m68knommu/kernel/syscalltable.S
View File

@ -336,7 +336,7 @@ ENTRY(sys_call_table)
.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 */

2
arch/mips/kernel/scall32-o32.S
View File

@ -660,7 +660,7 @@ einval: li v0, -EINVAL
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

2
arch/mips/kernel/scall64-64.S
View File

@ -475,7 +475,7 @@ sys_call_table:
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

2
arch/mips/kernel/scall64-n32.S
View File

@ -401,7 +401,7 @@ EXPORT(sysn32_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

2
arch/mips/kernel/scall64-o32.S
View File

@ -523,7 +523,7 @@ sys_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

8
arch/s390/kernel/compat_wrapper.S
View File

@ -1698,14 +1698,6 @@ compat_sys_signalfd_wrapper:
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

2
arch/s390/kernel/syscalls.S
View File

@ -325,5 +325,5 @@ SYSCALL(sys_utimes,sys_utimes,compat_sys_utimes_wrapper)
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)

2
arch/sparc/kernel/systbls.S
View File

@ -79,7 +79,7 @@ sys_call_table:
/*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. */

4
arch/sparc64/kernel/systbls.S
View File

@ -80,7 +80,7 @@ sys_call_table32:
.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 */
@ -152,7 +152,7 @@ sys_call_table:
.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)

32
fs/compat.c
View File

@ -2206,19 +2206,41 @@ asmlinkage long compat_sys_signalfd(int ufd,
#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 sys_timerfd(ufd, clockid, flags, ut);
return error;
}
asmlinkage long compat_sys_timerfd_gettime(int ufd,
struct compat_itimerspec __user *otmr)
{
int error;
struct itimerspec t;
struct itimerspec __user *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 */

207
fs/timerfd.c
View File

@ -25,13 +25,15 @@ struct timerfd_ctx {
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)
{
@ -40,13 +42,24 @@ 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;
@ -57,8 +70,9 @@ static void timerfd_setup(struct timerfd_ctx *ctx, int clockid, int flags,
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)
@ -83,7 +97,7 @@ static unsigned int timerfd_poll(struct file *file, poll_table *wait)
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);
@ -102,11 +116,11 @@ static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count,
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;
}
@ -121,22 +135,21 @@ static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count,
__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)
@ -150,76 +163,132 @@ static const struct file_operations timerfd_fops = {
.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)
{
int error;
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, ufd;
struct timerfd_ctx *ctx;
struct file *file;
struct inode *inode;
struct itimerspec ktmr;
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 (clockid != CLOCK_MONOTONIC &&
clockid != CLOCK_REALTIME)
return -EINVAL;
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;
}

2
include/asm-powerpc/systbl.h
View File

@ -309,7 +309,7 @@ SYSCALL_SPU(getcpu)
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)

7
include/linux/compat.h
View File

@ -279,8 +279,11 @@ asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
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 */

10
include/linux/hrtimer.h
View File

@ -301,12 +301,12 @@ static inline int hrtimer_is_queued(struct hrtimer *timer)
}
/* 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);
}
@ -329,9 +329,9 @@ extern void hrtimer_run_pending(void);
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: */

7
include/linux/syscalls.h
View File

@ -607,8 +607,11 @@ asmlinkage long sys_set_robust_list(struct robust_list_head __user *head,
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);

9
kernel/hrtimer.c
View File

@ -306,7 +306,7 @@ EXPORT_SYMBOL_GPL(ktime_sub_ns);
/*
* 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;
@ -321,7 +321,7 @@ unsigned long ktime_divns(const ktime_t kt, s64 div)
dclc >>= sft;
do_div(dclc, (unsigned long) div);
return (unsigned long) dclc;
return dclc;
}
#endif /* BITS_PER_LONG >= 64 */
@ -656,10 +656,9 @@ void unlock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
* 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);

9
kernel/posix-timers.c
View File

@ -256,8 +256,9 @@ static void schedule_next_timer(struct k_itimer *timr)
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;
@ -386,7 +387,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer)
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;
@ -662,7 +663,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting)
*/
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 */

7
kernel/sys_ni.c
View File

@ -154,7 +154,10 @@ cond_syscall(sys_ioprio_get);
/* 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);