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Commit 292264de authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'net-timestamps-y2038' 



Deepa Dinamani says:

====================
Convert network timestamps to be y2038 safe

Introduction:

The series is aimed at transitioning network timestamps to being
y2038 safe.
All patches can be reviewed and merged independently.

Socket timestamps and ioctl calls will be handled separately.

Thanks to Arnd Bergmann for discussing solution options with me.

Solution:

Data type struct timespec is not y2038 safe.
Replace timespec with struct timespec64 which is y2038 safe.

Changes v1 -> v2:
  Move and rename inet_current_time() as discussed
  Squash patches 1 and 2
  Reword commit text for patch 2/3
  Carry over review tags
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents e9c0d61d 6497c7e6

include/net/ip.h

+2 −0
Original line number Diff line number Diff line
@@ -240,6 +240,8 @@ static inline int inet_is_local_reserved_port(struct net *net, int port) 
}

#endif



__be32 inet_current_timestamp(void);



/* From inetpeer.c */

extern int inet_peer_threshold;

extern int inet_peer_minttl;

net/ipv4/af_inet.c

+26 −0
Original line number Diff line number Diff line
@@ -1380,6 +1380,32 @@ static struct sk_buff **inet_gro_receive(struct sk_buff **head, 
	return pp;

}



#define SECONDS_PER_DAY	86400



/* inet_current_timestamp - Return IP network timestamp

 *

 * Return milliseconds since midnight in network byte order.

 */

__be32 inet_current_timestamp(void)

{

	u32 secs;

	u32 msecs;

	struct timespec64 ts;



	ktime_get_real_ts64(&ts);



	/* Get secs since midnight. */

	(void)div_u64_rem(ts.tv_sec, SECONDS_PER_DAY, &secs);

	/* Convert to msecs. */

	msecs = secs * MSEC_PER_SEC;

	/* Convert nsec to msec. */

	msecs += (u32)ts.tv_nsec / NSEC_PER_MSEC;



	/* Convert to network byte order. */

	return htons(msecs);

}

EXPORT_SYMBOL(inet_current_timestamp);



int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)

{

	if (sk->sk_family == AF_INET)

net/ipv4/icmp.c

+1 −4
Original line number Diff line number Diff line
@@ -931,7 +931,6 @@ static bool icmp_echo(struct sk_buff *skb) 
 */

static bool icmp_timestamp(struct sk_buff *skb)

{

	struct timespec tv;

	struct icmp_bxm icmp_param;

	/*

	 *	Too short.
@@ -942,9 +941,7 @@ static bool icmp_timestamp(struct sk_buff *skb) 
	/*

	 *	Fill in the current time as ms since midnight UT:

	 */

	getnstimeofday(&tv);

	icmp_param.data.times[1] = htonl((tv.tv_sec % 86400) * MSEC_PER_SEC +

					 tv.tv_nsec / NSEC_PER_MSEC);

	icmp_param.data.times[1] = inet_current_timestamp();

	icmp_param.data.times[2] = icmp_param.data.times[1];

	if (skb_copy_bits(skb, 0, &icmp_param.data.times[0], 4))

		BUG();

net/ipv4/ip_options.c

+6 −8
Original line number Diff line number Diff line
@@ -58,10 +58,9 @@ void ip_options_build(struct sk_buff *skb, struct ip_options *opt, 
		if (opt->ts_needaddr)

			ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, skb, rt);

		if (opt->ts_needtime) {

			struct timespec tv;

			__be32 midtime;

			getnstimeofday(&tv);

			midtime = htonl((tv.tv_sec % 86400) * MSEC_PER_SEC + tv.tv_nsec / NSEC_PER_MSEC);



			midtime = inet_current_timestamp();

			memcpy(iph+opt->ts+iph[opt->ts+2]-5, &midtime, 4);

		}

		return;
@@ -415,11 +414,10 @@ int ip_options_compile(struct net *net, 
					break;

				}

				if (timeptr) {

					struct timespec tv;

					u32  midtime;

					getnstimeofday(&tv);

					midtime = (tv.tv_sec % 86400) * MSEC_PER_SEC + tv.tv_nsec / NSEC_PER_MSEC;

					put_unaligned_be32(midtime, timeptr);

					__be32 midtime;



					midtime = inet_current_timestamp();

					memcpy(timeptr, &midtime, 4);

					opt->is_changed = 1;

				}

			} else if ((optptr[3]&0xF) != IPOPT_TS_PRESPEC) {

net/ipv4/tcp_probe.c

+4 −4
Original line number Diff line number Diff line
@@ -187,13 +187,13 @@ static int tcpprobe_sprint(char *tbuf, int n) 
{

	const struct tcp_log *p

		= tcp_probe.log + tcp_probe.tail;

	struct timespec tv

		= ktime_to_timespec(ktime_sub(p->tstamp, tcp_probe.start));

	struct timespec64 ts

		= ktime_to_timespec64(ktime_sub(p->tstamp, tcp_probe.start));



	return scnprintf(tbuf, n,

			"%lu.%09lu %pISpc %pISpc %d %#x %#x %u %u %u %u %u\n",

			(unsigned long)tv.tv_sec,

			(unsigned long)tv.tv_nsec,

			(unsigned long)ts.tv_sec,

			(unsigned long)ts.tv_nsec,

			&p->src, &p->dst, p->length, p->snd_nxt, p->snd_una,

			p->snd_cwnd, p->ssthresh, p->snd_wnd, p->srtt, p->rcv_wnd);

}