tcp: convert icsk_user_timeout from jiffies to msecs

This is a preparatory commit. Part of this series that improves the
socket TCP_USER_TIMEOUT option accuracy. Implement Eric Dumazets idea
to convert icsk->icsk_user_timeout from jiffies to msecs. To eliminate
the msecs_to_jiffies() and jiffies_to_msecs() dance in future.

Signed-off-by: Jon Maxwell <jmaxwell37@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index bce53b1..514aaac 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2989,7 +2989,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
                if (val < 0)
                        err = -EINVAL;
                else
-                       icsk->icsk_user_timeout = msecs_to_jiffies(val);
+                       icsk->icsk_user_timeout = val;
                break;
 
        case TCP_FASTOPEN:
@@ -3445,7 +3445,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
                break;
 
        case TCP_USER_TIMEOUT:
-               val = jiffies_to_msecs(icsk->icsk_user_timeout);
+               val = icsk->icsk_user_timeout;
                break;
 
        case TCP_FASTOPEN:

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 3b36117..fa34984 100644 (file)
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -183,8 +183,9 @@ static bool retransmits_timed_out(struct sock *sk,
                else
                        timeout = ((2 << linear_backoff_thresh) - 1) * rto_base +
                                (boundary - linear_backoff_thresh) * TCP_RTO_MAX;
+               timeout = jiffies_to_msecs(timeout);
        }
-       return (tcp_time_stamp(tcp_sk(sk)) - start_ts) >= jiffies_to_msecs(timeout);
+       return (tcp_time_stamp(tcp_sk(sk)) - start_ts) >= timeout;
 }
 
 /* A write timeout has occurred. Process the after effects. */
@@ -337,8 +338,7 @@ static void tcp_probe_timer(struct sock *sk)
        if (!start_ts)
                skb->skb_mstamp = tp->tcp_mstamp;
        else if (icsk->icsk_user_timeout &&
-                (s32)(tcp_time_stamp(tp) - start_ts) >
-                jiffies_to_msecs(icsk->icsk_user_timeout))
+                (s32)(tcp_time_stamp(tp) - start_ts) > icsk->icsk_user_timeout)
                goto abort;
 
        max_probes = sock_net(sk)->ipv4.sysctl_tcp_retries2;
@@ -672,7 +672,7 @@ static void tcp_keepalive_timer (struct timer_list *t)
                 * to determine when to timeout instead.
                 */
                if ((icsk->icsk_user_timeout != 0 &&
-                   elapsed >= icsk->icsk_user_timeout &&
+                   elapsed >= msecs_to_jiffies(icsk->icsk_user_timeout) &&
                    icsk->icsk_probes_out > 0) ||
                    (icsk->icsk_user_timeout == 0 &&
                    icsk->icsk_probes_out >= keepalive_probes(tp))) {