[CCID-3/4] Share ccid3_hc_tx_update_win_count function via tfrc_ccids
Signed-off-by: Leandro Melo de Sales <leandro@xxxxxxxxxxxxxxxxxxxx>
Index: leandro.new/net/dccp/ccids/ccid3.c
===================================================================
--- leandro.new.orig/net/dccp/ccids/ccid3.c
+++ leandro.new/net/dccp/ccids/ccid3.c
@@ -192,28 +192,6 @@ static inline void ccid3_hc_tx_update_s(
ccid3_update_send_interval(hctx);
}
-/*
- * Update Window Counter using the algorithm from [RFC 4342, 8.1].
- * The algorithm is not applicable if RTT < 4 microseconds.
- */
-static inline void ccid3_hc_tx_update_win_count(struct ccid3_hc_tx_sock *hctx,
- ktime_t now)
-{
- u32 quarter_rtts;
-
- if (unlikely(hctx->ccid3hctx_rtt < 4)) /* avoid divide-by-zero */
- return;
-
- quarter_rtts = ktime_us_delta(now, hctx->ccid3hctx_t_last_win_count);
- quarter_rtts /= hctx->ccid3hctx_rtt / 4;
-
- if (quarter_rtts > 0) {
- hctx->ccid3hctx_t_last_win_count = now;
- hctx->ccid3hctx_last_win_count += min_t(u32, quarter_rtts, 5);
- hctx->ccid3hctx_last_win_count &= 0xF; /* mod 16 */
- }
-}
-
static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
{
struct sock *sk = (struct sock *)data;
@@ -358,7 +336,7 @@ static int ccid3_hc_tx_send_packet(struc
if (delay - (s64)hctx->ccid3hctx_delta >= 1000)
return (u32)delay / 1000L;
- ccid3_hc_tx_update_win_count(hctx, now);
+ tfrc_hc_tx_update_win_count(hctx, now);
break;
case TFRC_SSTATE_TERM:
DCCP_BUG("%s(%p) - Illegal state TERM", dccp_role(sk), sk);
Index: leandro.new/net/dccp/ccids/ccid4.c
===================================================================
--- leandro.new.orig/net/dccp/ccids/ccid4.c
+++ leandro.new/net/dccp/ccids/ccid4.c
@@ -218,28 +218,6 @@ static inline void ccid4_hc_tx_update_s(
ccid4_update_send_interval(hctx);
}
-/*
- * Update Window Counter using the algorithm from [RFC 4342, 8.1].
- * The algorithm is not applicable if RTT < 4 microseconds.
- */
-static inline void ccid4_hc_tx_update_win_count(struct ccid4_hc_tx_sock *hctx,
- ktime_t now)
-{
- u32 quarter_rtts;
-
- if (unlikely(hctx->ccid4hctx_rtt < 4)) /* avoid divide-by-zero */
- return;
-
- quarter_rtts = ktime_us_delta(now, hctx->ccid4hctx_t_last_win_count);
- quarter_rtts /= hctx->ccid4hctx_rtt / 4;
-
- if (quarter_rtts > 0) {
- hctx->ccid4hctx_t_last_win_count = now;
- hctx->ccid4hctx_last_win_count += min_t(u32, quarter_rtts, 5);
- hctx->ccid4hctx_last_win_count &= 0xF; /* mod 16 */
- }
-}
-
static void ccid4_hc_tx_no_feedback_timer(unsigned long data)
{
struct sock *sk = (struct sock *)data;
@@ -384,7 +362,7 @@ static int ccid4_hc_tx_send_packet(struc
if (delay - (s64)hctx->ccid4hctx_delta >= 1000)
return (u32)delay / 1000L;
- ccid4_hc_tx_update_win_count(hctx, now);
+ tfrc_hc_tx_update_win_count(hctx, now);
break;
case TFRC_SSTATE_TERM:
DCCP_BUG("%s(%p) - Illegal state TERM", dccp_role(sk), sk);
Index: leandro.new/net/dccp/ccids/lib/tfrc_ccids.c
===================================================================
--- leandro.new.orig/net/dccp/ccids/lib/tfrc_ccids.c
+++ leandro.new/net/dccp/ccids/lib/tfrc_ccids.c
@@ -42,3 +42,27 @@ u32 tfrc_hc_tx_idle_rtt(struct tfrc_hc_t
EXPORT_SYMBOL_GPL(tfrc_hc_tx_idle_rtt);
+/*
+ * Update Window Counter using the algorithm from [RFC 4342, 8.1].
+ * The algorithm is not applicable if RTT < 4 microseconds.
+ */
+inline void tfrc_hc_tx_update_win_count(struct tfrc_hc_tx_sock *hctx,
+ ktime_t now)
+{
+ u32 quarter_rtts;
+
+ if (unlikely(hctx->tfrchctx_rtt < 4)) /* avoid divide-by-zero */
+ return;
+
+ quarter_rtts = ktime_us_delta(now, hctx->tfrchctx_t_last_win_count);
+ quarter_rtts /= hctx->tfrchctx_rtt / 4;
+
+ if (quarter_rtts > 0) {
+ hctx->tfrchctx_t_last_win_count = now;
+ hctx->tfrchctx_last_win_count += min_t(u32, quarter_rtts, 5);
+ hctx->tfrchctx_last_win_count &= 0xF; /* mod 16 */
+ }
+}
+
+EXPORT_SYMBOL_GPL(tfrc_hc_tx_update_win_count);
+
Index: leandro.new/net/dccp/ccids/lib/tfrc_ccids.h
===================================================================
--- leandro.new.orig/net/dccp/ccids/lib/tfrc_ccids.h
+++ leandro.new/net/dccp/ccids/lib/tfrc_ccids.h
@@ -175,3 +175,7 @@ static const char *tfrc_tx_state_name(en
extern u64 rfc3390_initial_rate(struct sock *sk);
extern u32 tfrc_hc_tx_idle_rtt(struct tfrc_hc_tx_sock *hctx, ktime_t now);
+
+extern void tfrc_hc_tx_update_win_count(struct tfrc_hc_tx_sock *hctx,
+ ktime_t now);
+
-
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