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net: socket: move ktime2ts to ktime header api 

Currently, ktime2ts is a small helper function that is only used in
net/socket.c. Move this helper into the ktime API as a small inline
function, so that i) it's maintained together with ktime routines,
and ii) also other files can make use of it. The function is named
ktime_to_timespec_cond() and placed into the generic part of ktime,
since we internally make use of ktime_to_timespec(). ktime_to_timespec()
itself does not check the ktime variable for zero, hence, we name
this function ktime_to_timespec_cond() for only a conditional
conversion, and adapt its users to it.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2013-04-16 01:29:10 +00:00 committed by David S. Miller
parent cf27014866
commit 6e94d1ef37
2 changed files with 22 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
include/linux/ktime.h
View File

@ -330,6 +330,24 @@ static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec)
extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs);
/**
* ktime_to_timespec_cond - convert a ktime_t variable to timespec
* format only if the variable contains data
* @kt: the ktime_t variable to convert
* @ts: the timespec variable to store the result in
*
* Returns true if there was a successful conversion, false if kt was 0.
*/
static inline bool ktime_to_timespec_cond(const ktime_t kt, struct timespec *ts)
{
if (kt.tv64) {
*ts = ktime_to_timespec(kt);
return true;
} else {
return false;
}
}
/*
* The resolution of the clocks. The resolution value is returned in
* the clock_getres() system call to give application programmers an

20
net/socket.c
View File

@ -681,16 +681,6 @@ int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
}
EXPORT_SYMBOL(kernel_sendmsg);
static int ktime2ts(ktime_t kt, struct timespec *ts)
{
if (kt.tv64) {
*ts = ktime_to_timespec(kt);
return 1;
} else {
return 0;
}
}
/*
* called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
*/
@ -723,17 +713,15 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
memset(ts, 0, sizeof(ts));
if (skb->tstamp.tv64 &&
sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) {
skb_get_timestampns(skb, ts + 0);
if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) &&
ktime_to_timespec_cond(skb->tstamp, ts + 0))
empty = 0;
}
if (shhwtstamps) {
if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) &&
ktime2ts(shhwtstamps->syststamp, ts + 1))
ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1))
empty = 0;
if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) &&
ktime2ts(shhwtstamps->hwtstamp, ts + 2))
ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2))
empty = 0;
}
if (!empty)