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authorFlorin Coras <fcoras@cisco.com>2020-01-27 18:34:13 +0000
committerDave Barach <openvpp@barachs.net>2020-01-28 15:06:27 +0000
commitdda2dbedab8d7fda3b90f9340a20eafdc865b04b (patch)
tree116b6a684458a85393ce80778edc36bb80c5999e /src/plugins
parent7d08e39a87f5805d1ef764aa0fd986490fb4f7bb (diff)
hsa: proxy rcv wnd update acks after full fifos
Avoid rcv wnd probing after zero window advertisments by registering for tx dequeue notifications and forcing acks that open the rcv wnd. Type: feature Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I8f33e3cf917f8c83d412f370ca66013aa4cd6e67
Diffstat (limited to 'src/plugins')
-rw-r--r--src/plugins/hs_apps/proxy.c93
1 files changed, 87 insertions, 6 deletions
diff --git a/src/plugins/hs_apps/proxy.c b/src/plugins/hs_apps/proxy.c
index e2a44e1706b..ad5b292c56d 100644
--- a/src/plugins/hs_apps/proxy.c
+++ b/src/plugins/hs_apps/proxy.c
@@ -18,9 +18,12 @@
#include <vnet/session/application.h>
#include <vnet/session/application_interface.h>
#include <hs_apps/proxy.h>
+#include <vnet/tcp/tcp.h>
proxy_main_t proxy_main;
+#define TCP_MSS 1460
+
typedef struct
{
char uri[128];
@@ -189,7 +192,7 @@ proxy_rx_callback (session_t * s)
proxy_session_t *ps;
int proxy_index;
uword *p;
- svm_fifo_t *active_open_tx_fifo;
+ svm_fifo_t *ao_tx_fifo;
ASSERT (s->thread_index == thread_index);
@@ -199,20 +202,23 @@ proxy_rx_callback (session_t * s)
if (PREDICT_TRUE (p != 0))
{
clib_spinlock_unlock_if_init (&pm->sessions_lock);
- active_open_tx_fifo = s->rx_fifo;
+ ao_tx_fifo = s->rx_fifo;
/*
* Send event for active open tx fifo
*/
- if (svm_fifo_set_event (active_open_tx_fifo))
+ if (svm_fifo_set_event (ao_tx_fifo))
{
- u32 ao_thread_index = active_open_tx_fifo->master_thread_index;
- u32 ao_session_index = active_open_tx_fifo->master_session_index;
+ u32 ao_thread_index = ao_tx_fifo->master_thread_index;
+ u32 ao_session_index = ao_tx_fifo->master_session_index;
if (session_send_io_evt_to_thread_custom (&ao_session_index,
ao_thread_index,
SESSION_IO_EVT_TX))
clib_warning ("failed to enqueue tx evt");
}
+
+ if (svm_fifo_max_enqueue (ao_tx_fifo) <= TCP_MSS)
+ svm_fifo_add_want_deq_ntf (ao_tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
}
else
{
@@ -257,12 +263,48 @@ proxy_rx_callback (session_t * s)
return 0;
}
+static int
+proxy_tx_callback (session_t * proxy_s)
+{
+ proxy_main_t *pm = &proxy_main;
+ transport_connection_t *tc;
+ session_handle_t handle;
+ proxy_session_t *ps;
+ session_t *ao_s;
+ uword *p;
+
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+
+ handle = session_handle (proxy_s);
+ p = hash_get (pm->proxy_session_by_server_handle, handle);
+ if (!p)
+ return 0;
+
+ if (pool_is_free_index (pm->sessions, p[0]))
+ return 0;
+
+ ps = pool_elt_at_index (pm->sessions, p[0]);
+ if (ps->vpp_active_open_handle == ~0)
+ return 0;
+
+ ao_s = session_get_from_handle (ps->vpp_active_open_handle);
+
+ /* Force ack on active open side to update rcv wnd */
+ tc = session_get_transport (ao_s);
+ tcp_send_ack ((tcp_connection_t *) tc);
+
+ clib_spinlock_unlock_if_init (&pm->sessions_lock);
+
+ return 0;
+}
+
static session_cb_vft_t proxy_session_cb_vft = {
.session_accept_callback = proxy_accept_callback,
.session_disconnect_callback = proxy_disconnect_callback,
.session_connected_callback = proxy_connected_callback,
.add_segment_callback = proxy_add_segment_callback,
.builtin_app_rx_callback = proxy_rx_callback,
+ .builtin_app_tx_callback = proxy_tx_callback,
.session_reset_callback = proxy_reset_callback
};
@@ -358,6 +400,44 @@ active_open_rx_callback (session_t * s)
SESSION_IO_EVT_TX);
}
+ if (svm_fifo_max_enqueue (proxy_tx_fifo) <= TCP_MSS)
+ svm_fifo_add_want_deq_ntf (proxy_tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
+
+ return 0;
+}
+
+static int
+active_open_tx_callback (session_t * ao_s)
+{
+ proxy_main_t *pm = &proxy_main;
+ transport_connection_t *tc;
+ session_handle_t handle;
+ proxy_session_t *ps;
+ session_t *proxy_s;
+ uword *p;
+
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+
+ handle = session_handle (ao_s);
+ p = hash_get (pm->proxy_session_by_active_open_handle, handle);
+ if (!p)
+ return 0;
+
+ if (pool_is_free_index (pm->sessions, p[0]))
+ return 0;
+
+ ps = pool_elt_at_index (pm->sessions, p[0]);
+ if (ps->vpp_server_handle == ~0)
+ return 0;
+
+ proxy_s = session_get_from_handle (ps->vpp_server_handle);
+
+ /* Force ack on proxy side to update rcv wnd */
+ tc = session_get_transport (proxy_s);
+ tcp_send_ack ((tcp_connection_t *) tc);
+
+ clib_spinlock_unlock_if_init (&pm->sessions_lock);
+
return 0;
}
@@ -367,7 +447,8 @@ static session_cb_vft_t active_open_clients = {
.session_connected_callback = active_open_connected_callback,
.session_accept_callback = active_open_create_callback,
.session_disconnect_callback = active_open_disconnect_callback,
- .builtin_app_rx_callback = active_open_rx_callback
+ .builtin_app_rx_callback = active_open_rx_callback,
+ .builtin_app_tx_callback = active_open_tx_callback,
};
/* *INDENT-ON* */