From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/timerfd.c | 48 ++++++++++++++++++++++++++++++------------------
1 files changed, 30 insertions(+), 18 deletions(-)
diff --git a/kernel/fs/timerfd.c b/kernel/fs/timerfd.c
index d69ad80..06c0623 100644
--- a/kernel/fs/timerfd.c
+++ b/kernel/fs/timerfd.c
@@ -26,6 +26,9 @@
#include <linux/syscalls.h>
#include <linux/compat.h>
#include <linux/rcupdate.h>
+#include <linux/time_namespace.h>
+
+#include <trace/hooks/fs.h>
struct timerfd_ctx {
union {
@@ -196,6 +199,8 @@
}
if (texp != 0) {
+ if (flags & TFD_TIMER_ABSTIME)
+ texp = timens_ktime_to_host(clockid, texp);
if (isalarm(ctx)) {
if (flags & TFD_TIMER_ABSTIME)
alarm_start(&ctx->t.alarm, texp);
@@ -302,11 +307,11 @@
static void timerfd_show(struct seq_file *m, struct file *file)
{
struct timerfd_ctx *ctx = file->private_data;
- struct itimerspec t;
+ struct timespec64 value, interval;
spin_lock_irq(&ctx->wqh.lock);
- t.it_value = ktime_to_timespec(timerfd_get_remaining(ctx));
- t.it_interval = ktime_to_timespec(ctx->tintv);
+ value = ktime_to_timespec64(timerfd_get_remaining(ctx));
+ interval = ktime_to_timespec64(ctx->tintv);
spin_unlock_irq(&ctx->wqh.lock);
seq_printf(m,
@@ -318,10 +323,10 @@
ctx->clockid,
(unsigned long long)ctx->ticks,
ctx->settime_flags,
- (unsigned long long)t.it_value.tv_sec,
- (unsigned long long)t.it_value.tv_nsec,
- (unsigned long long)t.it_interval.tv_sec,
- (unsigned long long)t.it_interval.tv_nsec);
+ (unsigned long long)value.tv_sec,
+ (unsigned long long)value.tv_nsec,
+ (unsigned long long)interval.tv_sec,
+ (unsigned long long)interval.tv_nsec);
}
#else
#define timerfd_show NULL
@@ -388,6 +393,7 @@
{
int ufd;
struct timerfd_ctx *ctx;
+ char file_name_buf[32];
/* Check the TFD_* constants for consistency. */
BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC);
@@ -424,7 +430,9 @@
ctx->moffs = ktime_mono_to_real(0);
- ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
+ strlcpy(file_name_buf, "[timerfd]", sizeof(file_name_buf));
+ trace_android_vh_timerfd_create(file_name_buf, sizeof(file_name_buf));
+ ufd = anon_inode_getfd(file_name_buf, &timerfd_fops, ctx,
O_RDWR | (flags & TFD_SHARED_FCNTL_FLAGS));
if (ufd < 0)
kfree(ctx);
@@ -432,7 +440,7 @@
return ufd;
}
-static int do_timerfd_settime(int ufd, int flags,
+static int do_timerfd_settime(int ufd, int flags,
const struct itimerspec64 *new,
struct itimerspec64 *old)
{
@@ -471,7 +479,11 @@
break;
}
spin_unlock_irq(&ctx->wqh.lock);
- cpu_relax();
+
+ if (isalarm(ctx))
+ hrtimer_cancel_wait_running(&ctx->t.alarm.timer);
+ else
+ hrtimer_cancel_wait_running(&ctx->t.tmr);
}
/*
@@ -560,30 +572,30 @@
}
#ifdef CONFIG_COMPAT_32BIT_TIME
-COMPAT_SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
- const struct compat_itimerspec __user *, utmr,
- struct compat_itimerspec __user *, otmr)
+SYSCALL_DEFINE4(timerfd_settime32, int, ufd, int, flags,
+ const struct old_itimerspec32 __user *, utmr,
+ struct old_itimerspec32 __user *, otmr)
{
struct itimerspec64 new, old;
int ret;
- if (get_compat_itimerspec64(&new, utmr))
+ if (get_old_itimerspec32(&new, utmr))
return -EFAULT;
ret = do_timerfd_settime(ufd, flags, &new, &old);
if (ret)
return ret;
- if (otmr && put_compat_itimerspec64(&old, otmr))
+ if (otmr && put_old_itimerspec32(&old, otmr))
return -EFAULT;
return ret;
}
-COMPAT_SYSCALL_DEFINE2(timerfd_gettime, int, ufd,
- struct compat_itimerspec __user *, otmr)
+SYSCALL_DEFINE2(timerfd_gettime32, int, ufd,
+ struct old_itimerspec32 __user *, otmr)
{
struct itimerspec64 kotmr;
int ret = do_timerfd_gettime(ufd, &kotmr);
if (ret)
return ret;
- return put_compat_itimerspec64(&kotmr, otmr) ? -EFAULT : 0;
+ return put_old_itimerspec32(&kotmr, otmr) ? -EFAULT : 0;
}
#endif
--
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