diff options
| -rw-r--r-- | net/dccp/dccp.h | 2 | ||||
| -rw-r--r-- | net/dccp/options.c | 2 | ||||
| -rw-r--r-- | net/dccp/proto.c | 2 | ||||
| -rw-r--r-- | net/dccp/timer.c | 21 |
4 files changed, 26 insertions, 1 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index ddacc23be5e..a75c740ae6c 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -396,6 +396,8 @@ extern int dccp_insert_options(struct sock *sk, struct sk_buff *skb); extern int dccp_insert_option_elapsed_time(struct sock *sk, struct sk_buff *skb, u32 elapsed_time); +extern u32 dccp_timestamp(void); +extern void dccp_timestamping_init(void); extern int dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb); extern int dccp_insert_option(struct sock *sk, struct sk_buff *skb, diff --git a/net/dccp/options.c b/net/dccp/options.c index 167415677a7..a57fcbd7d03 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -372,7 +372,7 @@ EXPORT_SYMBOL_GPL(dccp_insert_option_elapsed_time); int dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb) { - __be32 now = htonl(((suseconds_t)ktime_to_us(ktime_get_real())) / 10); + __be32 now = htonl(dccp_timestamp()); /* yes this will overflow but that is the point as we want a * 10 usec 32 bit timer which mean it wraps every 11.9 hours */ diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 8d545da3526..14ec1d21452 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -1076,6 +1076,8 @@ static int __init dccp_init(void) rc = dccp_sysctl_init(); if (rc) goto out_ackvec_exit; + + dccp_timestamping_init(); out: return rc; out_ackvec_exit: diff --git a/net/dccp/timer.c b/net/dccp/timer.c index 0197a41c256..3af067354bd 100644 --- a/net/dccp/timer.c +++ b/net/dccp/timer.c @@ -291,3 +291,24 @@ void dccp_init_xmit_timers(struct sock *sk) inet_csk_init_xmit_timers(sk, &dccp_write_timer, &dccp_delack_timer, &dccp_keepalive_timer); } + +static ktime_t dccp_timestamp_seed; +/** + * dccp_timestamp - 10s of microseconds time source + * Returns the number of 10s of microseconds since loading DCCP. This is native + * DCCP time difference format (RFC 4340, sec. 13). + * Please note: This will wrap around about circa every 11.9 hours. + */ +u32 dccp_timestamp(void) +{ + s64 delta = ktime_us_delta(ktime_get_real(), dccp_timestamp_seed); + + do_div(delta, 10); + return delta; +} +EXPORT_SYMBOL_GPL(dccp_timestamp); + +void __init dccp_timestamping_init(void) +{ + dccp_timestamp_seed = ktime_get_real(); +} |