Viewing file:  sock-1.c (2.2 KB) -rw-r--r--
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typedef unsigned int __u32;
__extension__ typedef __signed__ long long __s64;
__extension__ typedef unsigned long long __u64;
typedef __u32 u32;
typedef __s64 s64;
typedef __u64 u64;
typedef long long __kernel_time64_t;
typedef _Bool bool;
typedef __s64 time64_t;
struct __kernel_timespec {
__kernel_time64_t tv_sec;
long long tv_nsec;
};
struct timespec64 {
time64_t tv_sec;
long tv_nsec;
};
extern struct timespec64 ns_to_timespec64(const s64 nsec);
int put_timespec64(const struct timespec64 *ts,
struct __kernel_timespec *uts);
/* [...snip...] */
extern int put_old_timespec32(const struct timespec64 *, void *);
/* [...snip...] */
/* [...snip...] */
typedef s64 ktime_t;
/* [...snip...] */
extern void ktime_get_real_ts64(struct timespec64 *tv);
/* [...snip...] */
enum tk_offsets {
TK_OFFS_REAL,
TK_OFFS_BOOT,
TK_OFFS_TAI,
TK_OFFS_MAX,
};
extern ktime_t ktime_get(void);
extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
extern ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs);
extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
extern ktime_t ktime_get_raw(void);
extern u32 ktime_get_resolution_ns(void);
static ktime_t ktime_get_real(void)
{
return ktime_get_with_offset(TK_OFFS_REAL);
}
/* [...snip...] */
struct socket {
/* [...snip...] */
struct sock *sk;
/* [...snip...] */
};
/* [...snip...] */
struct sock {
/* [...snip...] */
ktime_t sk_stamp;
/* [...snip...] */
};
/* [...snip...] */
static ktime_t sock_read_timestamp(struct sock *sk)
{
return *(const volatile typeof(sk->sk_stamp) *)&(sk->sk_stamp);
}
static void sock_write_timestamp(struct sock *sk, ktime_t kt)
{
*(volatile typeof(sk->sk_stamp) *)&(sk->sk_stamp) = kt;
}
/* [...snip...] */
int sock_gettstamp(struct socket *sock, void *userstamp,
bool timeval, bool time32)
{
struct sock *sk = sock->sk;
struct timespec64 ts;
/* [...snip...] */
ts = ns_to_timespec64((sock_read_timestamp(sk)));
if (ts.tv_sec == -1)
return -2;
if (ts.tv_sec == 0) {
ktime_t kt = ktime_get_real();
sock_write_timestamp(sk, kt);
ts = ns_to_timespec64((kt));
}
if (timeval)
ts.tv_nsec /= 1000;
if (time32)
return put_old_timespec32(&ts, userstamp);
return put_timespec64(&ts, userstamp);
}
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