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authorFlorin Coras <fcoras@cisco.com>2018-07-04 04:15:05 -0700
committerDamjan Marion <dmarion@me.com>2018-07-17 09:02:17 +0000
commit3c2fed5145d9e40a9ecd178c2866c813eddc6203 (patch)
tree7ff2408f3b1c4a52fb6d7cd091508de1ce950e5f /src/vnet/session/application.c
parent5da96a77a84ae5414debbc46d390464d51010113 (diff)
session: use msg queue for events
Change-Id: I3c58367eec2243fe19b75be78a175c5261863e9e Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/session/application.c')
-rw-r--r--src/vnet/session/application.c141
1 files changed, 139 insertions, 2 deletions
diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c
index 60019dd7961..6041b49712d 100644
--- a/src/vnet/session/application.c
+++ b/src/vnet/session/application.c
@@ -807,6 +807,143 @@ application_get_segment_manager_properties (u32 app_index)
return &app->sm_properties;
}
+static inline int
+app_enqueue_evt (svm_msg_q_t * mq, svm_msg_q_msg_t * msg, u8 lock)
+{
+ if (PREDICT_TRUE (!svm_msg_q_is_full (mq)))
+ {
+ if (lock)
+ {
+ svm_msg_q_add_w_lock (mq, msg);
+ svm_msg_q_unlock (mq);
+ }
+ else if (svm_msg_q_add (mq, msg, SVM_Q_WAIT))
+ {
+ clib_warning ("msg q add returned");
+ if (lock)
+ svm_msg_q_unlock (mq);
+ return -1;
+ }
+ }
+ else
+ {
+ clib_warning ("evt q full");
+ svm_msg_q_free_msg (mq, msg);
+ if (lock)
+ svm_msg_q_unlock (mq);
+ return -1;
+ }
+ return 0;
+}
+
+static inline int
+app_send_io_evt_rx (application_t * app, stream_session_t * s, u8 lock)
+{
+ session_fifo_event_t *evt;
+ svm_msg_q_msg_t msg;
+ svm_msg_q_t *mq;
+
+ if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
+ {
+ /* Session is closed so app will never clean up. Flush rx fifo */
+ svm_fifo_dequeue_drop_all (s->server_rx_fifo);
+ return 0;
+ }
+
+ /* Built-in app? Hand event to the callback... */
+ if (app->cb_fns.builtin_app_rx_callback)
+ return app->cb_fns.builtin_app_rx_callback (s);
+
+ /* If no need for event, return */
+ if (!svm_fifo_set_event (s->server_rx_fifo))
+ return 0;
+
+ mq = app->event_queue;
+ if (lock)
+ svm_msg_q_lock (mq);
+
+ if (PREDICT_FALSE (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
+ {
+ clib_warning ("evt q rings full");
+ if (lock)
+ svm_msg_q_unlock (mq);
+ return -1;
+ }
+
+ msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
+ ASSERT (!svm_msg_q_msg_is_invalid (&msg));
+
+ evt = (session_fifo_event_t *) svm_msg_q_msg_data (mq, &msg);
+ evt->fifo = s->server_rx_fifo;
+ evt->event_type = FIFO_EVENT_APP_RX;
+
+ return app_enqueue_evt (mq, &msg, lock);
+}
+
+static inline int
+app_send_io_evt_tx (application_t * app, stream_session_t * s, u8 lock)
+{
+ svm_msg_q_t *mq;
+ session_fifo_event_t *evt;
+ svm_msg_q_msg_t msg;
+
+ if (application_is_builtin (app))
+ return 0;
+
+ mq = app->event_queue;
+ if (lock)
+ svm_msg_q_lock (mq);
+
+ if (PREDICT_FALSE (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
+ {
+ clib_warning ("evt q rings full");
+ if (lock)
+ svm_msg_q_unlock (mq);
+ return -1;
+ }
+
+ msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
+ ASSERT (!svm_msg_q_msg_is_invalid (&msg));
+
+ evt = (session_fifo_event_t *) svm_msg_q_msg_data (mq, &msg);
+ evt->event_type = FIFO_EVENT_APP_TX;
+ evt->fifo = s->server_tx_fifo;
+
+ return app_enqueue_evt (mq, &msg, lock);
+}
+
+/* *INDENT-OFF* */
+typedef int (app_send_evt_handler_fn) (application_t *app,
+ stream_session_t *s,
+ u8 lock);
+static app_send_evt_handler_fn * const app_send_evt_handler_fns[2] = {
+ app_send_io_evt_rx,
+ app_send_io_evt_tx,
+};
+/* *INDENT-ON* */
+
+/**
+ * Send event to application
+ *
+ * Logic from queue perspective is non-blocking. That is, if there's
+ * not enough space to enqueue a message, we return. However, if the lock
+ * flag is set, we do wait for queue mutex.
+ */
+int
+application_send_event (application_t * app, stream_session_t * s,
+ u8 evt_type)
+{
+ ASSERT (app && evt_type <= FIFO_EVENT_APP_TX);
+ return app_send_evt_handler_fns[evt_type] (app, s, 0 /* lock */ );
+}
+
+int
+application_lock_and_send_event (application_t * app, stream_session_t * s,
+ u8 evt_type)
+{
+ return app_send_evt_handler_fns[evt_type] (app, s, 1 /* lock */ );
+}
+
local_session_t *
application_alloc_local_session (application_t * app)
{
@@ -949,14 +1086,14 @@ application_local_session_connect (u32 table_index, application_t * client,
svm_fifo_segment_private_t *seg;
segment_manager_t *sm;
local_session_t *ls;
- svm_queue_t *sq, *cq;
+ svm_msg_q_t *sq, *cq;
ls = application_alloc_local_session (server);
props = application_segment_manager_properties (server);
cprops = application_segment_manager_properties (client);
evt_q_elts = props->evt_q_size + cprops->evt_q_size;
- evt_q_sz = evt_q_elts * sizeof (session_fifo_event_t);
+ evt_q_sz = segment_manager_evt_q_expected_size (evt_q_elts);
seg_size = props->rx_fifo_size + props->tx_fifo_size + evt_q_sz + margin;
has_transport = session_has_transport ((stream_session_t *) ll);