[DCCP]: Convert dccp_sample_rtt to ktime_t

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 23 insertions, 30 deletions

diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 1a0c5edb7b35..3524328db0b9 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -414,7 +414,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
         struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
         struct ccid3_options_received *opt_recv;
         struct dccp_tx_hist_entry *packet;
-        struct timeval now;
+        ktime_t now, t_hist;
         unsigned long t_nfb;
         u32 pinv, r_sample;
 
@@ -452,13 +452,13 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
                 else                                   /* can not exceed 100% */
                         hctx->ccid3hctx_p = 1000000 / pinv;
 
-                dccp_timestamp(sk, &now);
-
+                now = ktime_get_real();
+                t_hist = timeval_to_ktime(packet->dccphtx_tstamp);
                 /*
                  * Calculate new round trip sample as per [RFC 3448, 4.3] by
                  *      R_sample  =  (now - t_recvdata) - t_elapsed
                  */
-                r_sample = dccp_sample_rtt(sk, &now, &packet->dccphtx_tstamp);
+                r_sample = dccp_sample_rtt(sk, now, &t_hist);
 
                 /*
                  * Update RTT estimate by
@@ -475,7 +475,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
                          */
                         hctx->ccid3hctx_rtt  = r_sample;
                         hctx->ccid3hctx_x    = rfc3390_initial_rate(sk);
-                        hctx->ccid3hctx_t_ld = timeval_to_ktime(now);
+                        hctx->ccid3hctx_t_ld = now;
 
                         ccid3_update_send_interval(hctx);
 
@@ -882,6 +882,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
         struct dccp_rx_hist_entry *packet;
         u32 p_prev, r_sample, rtt_prev;
         int loss, payload_size;
+        ktime_t now;
 
         BUG_ON(hcrx == NULL);
 
@@ -891,14 +892,12 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
         case DCCP_PKT_ACK:
                 if (hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA)
                         return;
-        case DCCP_PKT_DATAACK: {
-                struct timeval now;
-
+        case DCCP_PKT_DATAACK:
                 if (opt_recv->dccpor_timestamp_echo == 0)
                         break;
                 rtt_prev = hcrx->ccid3hcrx_rtt;
-                dccp_timestamp(sk, &now);
-                r_sample = dccp_sample_rtt(sk, &now, NULL);
+                now = ktime_get_real();
+                r_sample = dccp_sample_rtt(sk, now, NULL);
 
                 if (hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA)
                         hcrx->ccid3hcrx_rtt = r_sample;
@@ -911,7 +910,6 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
                                        dccp_role(sk), sk, hcrx->ccid3hcrx_rtt,
                                        opt_recv->dccpor_elapsed_time);
                 break;
-        }
         case DCCP_PKT_DATA:
                 break;
         default: /* We're not interested in other packet types, move along */
@@ -942,9 +940,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
                 ccid3_hc_rx_send_feedback(sk);
                 ccid3_hc_rx_set_state(sk, TFRC_RSTATE_DATA);
                 return;
-        case TFRC_RSTATE_DATA: {
-                ktime_t now;
-
+        case TFRC_RSTATE_DATA:
                 hcrx->ccid3hcrx_bytes_recv += payload_size;
                 if (loss)
                         break;
@@ -956,7 +952,6 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
                         ccid3_hc_rx_send_feedback(sk);
                 }
                 return;
-        }
         case TFRC_RSTATE_TERM:
                 DCCP_BUG("%s(%p) - Illegal state TERM", dccp_role(sk), sk);
                 return;
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index e2d74cd7eeeb..20a7bedfe996 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -13,6 +13,7 @@
  */
 
 #include <linux/dccp.h>
+#include <linux/ktime.h>
 #include <net/snmp.h>
 #include <net/sock.h>
 #include <net/tcp.h>
@@ -296,8 +297,8 @@ extern int	   dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
 extern int         dccp_send_reset(struct sock *sk, enum dccp_reset_codes code);
 extern void        dccp_send_close(struct sock *sk, const int active);
 extern int         dccp_invalid_packet(struct sk_buff *skb);
-extern u32         dccp_sample_rtt(struct sock *sk, struct timeval *t_recv,
-                                                    struct timeval *t_history);
+extern u32         dccp_sample_rtt(struct sock *sk, ktime_t t_recv,
+                                   ktime_t *t_history);
 
 static inline int dccp_bad_service_code(const struct sock *sk,
                                         const __be32 service)
diff --git a/net/dccp/input.c b/net/dccp/input.c
index da6ec185ed5b..782cdb7292fa 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -301,12 +301,10 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
                         goto out_invalid_packet;
 
                 /* Obtain RTT sample from SYN exchange (used by CCID 3) */
-                if (dp->dccps_options_received.dccpor_timestamp_echo) {
-                        struct timeval now;
-
-                        dccp_timestamp(sk, &now);
-                        dp->dccps_syn_rtt = dccp_sample_rtt(sk, &now, NULL);
-                }
+                if (dp->dccps_options_received.dccpor_timestamp_echo)
+                        dp->dccps_syn_rtt = dccp_sample_rtt(sk,
+                                                            ktime_get_real(),
+                                                            NULL);
 
                 if (dccp_msk(sk)->dccpms_send_ack_vector &&
                     dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
@@ -593,22 +591,21 @@ EXPORT_SYMBOL_GPL(dccp_rcv_state_process);
  * @t_recv: receive timestamp of packet with timestamp echo
  * @t_hist: packet history timestamp or NULL
  */
-u32 dccp_sample_rtt(struct sock *sk, struct timeval *t_recv,
-                                     struct timeval *t_hist)
+u32 dccp_sample_rtt(struct sock *sk, ktime_t t_recv, ktime_t *t_hist)
 {
         struct dccp_sock *dp = dccp_sk(sk);
         struct dccp_options_received *or = &dp->dccps_options_received;
-        suseconds_t delta;
+        s64 delta;
 
         if (t_hist == NULL) {
                 if (!or->dccpor_timestamp_echo) {
                         DCCP_WARN("packet without timestamp echo\n");
                         return DCCP_SANE_RTT_MAX;
                 }
-                timeval_sub_usecs(t_recv, or->dccpor_timestamp_echo * 10);
-                delta = timeval_usecs(t_recv);
+                ktime_sub_us(t_recv, or->dccpor_timestamp_echo * 10);
+                delta = ktime_to_us(t_recv);
         } else
-                delta = timeval_delta(t_recv, t_hist);
+                delta = ktime_us_delta(t_recv, *t_hist);
 
         delta -= or->dccpor_elapsed_time * 10;          /* either set or 0 */
 
@@ -616,7 +613,7 @@ u32 dccp_sample_rtt(struct sock *sk, struct timeval *t_recv,
                 DCCP_WARN("unusable RTT sample %ld, using min\n", (long)delta);
                 return DCCP_SANE_RTT_MIN;
         }
-        if (unlikely(delta - (suseconds_t)DCCP_SANE_RTT_MAX > 0)) {
+        if (unlikely(delta - (s64)DCCP_SANE_RTT_MAX > 0)) {
                 DCCP_WARN("RTT sample %ld too large, using max\n", (long)delta);
                 return DCCP_SANE_RTT_MAX;
         }