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authorFlorin Coras <fcoras@cisco.com>2019-07-04 17:05:59 -0700
committerDamjan Marion <dmarion@me.com>2019-07-05 11:58:34 +0000
commitca2831a80c891ee941faf79cbd80805a2c343eaf (patch)
tree839d28f2b07486f77a68ea7461d9b1a80e8e5822
parenteff6b82e905f39aa740db38341626d8d615282fa (diff)
tcp: add cc algo start tx event
Type: feature Notify cc algos that new data is sent on a connection that was apparently idle. Change-Id: I892e5e9bb5b88d791265ffbbefce6f9694d01970 Signed-off-by: Florin Coras <fcoras@cisco.com>
-rw-r--r--src/vnet/tcp/tcp.h13
-rw-r--r--src/vnet/tcp/tcp_output.c3
2 files changed, 16 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index f2626af9da8..c83e7dced1e 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -288,6 +288,11 @@ typedef enum _tcp_cc_ack_t
TCP_CC_PARTIALACK
} tcp_cc_ack_t;
+typedef enum tcp_cc_event_
+{
+ TCP_CC_EVT_START_TX,
+} tcp_cc_event_t;
+
typedef struct _tcp_connection
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
@@ -388,6 +393,7 @@ struct _tcp_cc_algorithm
void (*loss) (tcp_connection_t * tc);
void (*recovered) (tcp_connection_t * tc);
void (*undo_recovery) (tcp_connection_t * tc);
+ void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt);
};
/* *INDENT-ON* */
@@ -979,6 +985,13 @@ tcp_cc_undo_recovery (tcp_connection_t * tc)
tc->cc_algo->undo_recovery (tc);
}
+static inline void
+tcp_cc_event (tcp_connection_t * tc, tcp_cc_event_t evt)
+{
+ if (tc->cc_algo->event)
+ tc->cc_algo->event (tc, evt);
+}
+
always_inline void
tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
{
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 8537b1fb772..17873ac4dab 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -425,6 +425,9 @@ tcp_update_burst_snd_vars (tcp_connection_t * tc)
if (tc->flags & TCP_CONN_RATE_SAMPLE)
tc->flags |= TCP_CONN_TRACK_BURST;
+
+ if (tc->snd_una == tc->snd_nxt)
+ tcp_cc_event (tc, TCP_CC_EVT_START_TX);
}
void