session_send_evt_to_thread (u64 session_handle, fifo_event_type_t evt_type,
u32 thread_index, void *fp, void *rpc_args)
{
- u32 tries = 0;
session_fifo_event_t evt = { {0}, };
svm_queue_t *q;
+ u32 tries = 0, max_tries;
evt.event_type = evt_type;
if (evt_type == FIFO_EVENT_RPC)
q = session_manager_get_vpp_event_queue (thread_index);
while (svm_queue_add (q, (u8 *) & evt, 1))
{
- if (tries++ == 3)
+ max_tries = vlib_get_current_process (vlib_get_main ())? 1e6 : 3;
+ if (tries++ == max_tries)
{
SESSION_DBG ("failed to enqueue evt");
break;
return s;
}
-static void
+void
session_free (stream_session_t * s)
{
pool_put (session_manager_main.sessions[s->thread_index], s);
memset (s, 0xFA, sizeof (*s));
}
-static int
+int
session_alloc_fifos (segment_manager_t * sm, stream_session_t * s)
{
svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
stream_session_t *s;
u32 thread_index = tc->thread_index;
- ASSERT (thread_index == vlib_get_thread_index ());
+ ASSERT (thread_index == vlib_get_thread_index ()
+ || transport_protocol_is_cl (tc->proto));
s = session_alloc (thread_index);
s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
return enqueued;
}
+
int
-session_enqueue_dgram_connection (stream_session_t * s, vlib_buffer_t * b,
- u8 proto, u8 queue_event)
+session_enqueue_dgram_connection (stream_session_t * s,
+ session_dgram_hdr_t * hdr,
+ vlib_buffer_t * b, u8 proto, u8 queue_event)
{
int enqueued = 0, rv, in_order_off;
- if (svm_fifo_max_enqueue (s->server_rx_fifo) < b->current_length)
- return -1;
+ ASSERT (svm_fifo_max_enqueue (s->server_rx_fifo)
+ >= b->current_length + sizeof (*hdr));
+
+ svm_fifo_enqueue_nowait (s->server_rx_fifo, sizeof (session_dgram_hdr_t),
+ (u8 *) hdr);
enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, b->current_length,
vlib_buffer_get_current (b));
if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
}
u32
-stream_session_tx_fifo_max_dequeue (transport_connection_t * tc)
+session_tx_fifo_max_dequeue (transport_connection_t * tc)
{
stream_session_t *s = session_get (tc->s_index, tc->thread_index);
if (!s->server_tx_fifo)
if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
{
/* Session is closed so app will never clean up. Flush rx fifo */
- u32 to_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo);
- if (to_dequeue)
- svm_fifo_dequeue_drop (s->server_rx_fifo, to_dequeue);
+ svm_fifo_dequeue_drop_all (s->server_rx_fifo);
return 0;
}
return 0;
}
- /* Built-in server? Hand event to the callback... */
- if (app->cb_fns.builtin_server_rx_callback)
- return app->cb_fns.builtin_server_rx_callback (s);
+ /* 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 event, send one */
if (svm_fifo_set_event (s->server_rx_fifo))
return 0;
}
+int
+session_dequeue_notify (stream_session_t * s)
+{
+ application_t *app;
+ svm_queue_t *q;
+
+ app = application_get (s->app_index);
+ if (application_is_builtin (app))
+ return 0;
+
+ q = app->event_queue;
+ if (PREDICT_TRUE (q->cursize < q->maxsize))
+ {
+ session_fifo_event_t evt = {
+ .event_type = FIFO_EVENT_APP_TX,
+ .fifo = s->server_tx_fifo
+ };
+ svm_queue_add (app->event_queue, (u8 *) & evt, SVM_Q_WAIT);
+ }
+ else
+ {
+ return -1;
+ }
+ return 0;
+}
+
/**
* Flushes queue of sessions that are to be notified of new data
* enqueued events.
return errors;
}
+int
+session_manager_flush_all_enqueue_events (u8 transport_proto)
+{
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ int i, errors = 0;
+ for (i = 0; i < 1 + vtm->n_threads; i++)
+ errors += session_manager_flush_enqueue_events (transport_proto, i);
+ return errors;
+}
+
/**
* Init fifo tail and head pointers
*
int
session_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
{
- application_t *app;
+ u32 opaque = 0, new_ti, new_si;
stream_session_t *new_s = 0;
- u64 handle;
- u32 opaque = 0;
- int error = 0;
segment_manager_t *sm;
+ application_t *app;
u8 alloc_fifos;
+ int error = 0;
+ u64 handle;
/*
* Find connection handle and cleanup half-open table
error = -1;
}
else
- new_s->app_index = app->index;
+ {
+ new_s->app_index = app->index;
+ new_si = new_s->session_index;
+ new_ti = new_s->thread_index;
+ }
}
/*
{
SESSION_DBG ("failed to notify app");
if (!is_fail)
- stream_session_disconnect_transport (new_s);
+ {
+ new_s = session_get (new_si, new_ti);
+ stream_session_disconnect_transport (new_s);
+ }
}
else
{
if (!is_fail)
- new_s->session_state = SESSION_STATE_READY;
+ {
+ new_s = session_get (new_si, new_ti);
+ new_s->session_state = SESSION_STATE_READY;
+ }
}
return error;
s = session_get (tc->s_index, tc->thread_index);
server = application_get (s->app_index);
server->cb_fns.session_disconnect_callback (s);
+ s->session_state = SESSION_STATE_CLOSING;
}
/**
* Cleans up session and lookup table.
+ *
+ * Transport connection must still be valid.
*/
void
stream_session_delete (stream_session_t * s)
stream_session_t *s;
application_t *app;
s = session_get (tc->s_index, tc->thread_index);
-
+ s->session_state = SESSION_STATE_CLOSED;
app = application_get (s->app_index);
app->cb_fns.session_reset_callback (s);
}
application_t *server;
stream_session_t *s, *listener;
segment_manager_t *sm;
- session_type_t sst;
int rv;
- sst = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
-
/* Find the server */
- listener = listen_session_get (sst, listener_index);
+ listener = listen_session_get (listener_index);
server = application_get (listener->app_index);
sm = application_get_listen_segment_manager (server, listener);
return 0;
}
-/**
- * Ask transport to open connection to remote transport endpoint.
- *
- * Stores handle for matching request with reply since the call can be
- * asynchronous. For instance, for TCP the 3-way handshake must complete
- * before reply comes. Session is only created once connection is established.
- *
- * @param app_index Index of the application requesting the connect
- * @param st Session type requested.
- * @param tep Remote transport endpoint
- * @param opaque Opaque data (typically, api_context) the application expects
- * on open completion.
- */
int
-session_open (u32 app_index, session_endpoint_t * rmt, u32 opaque)
+session_open_cl (u32 app_index, session_endpoint_t * rmt, u32 opaque)
{
transport_connection_t *tc;
transport_endpoint_t *tep;
stream_session_t *s;
application_t *app;
int rv;
+
+ tep = session_endpoint_to_transport (rmt);
+ rv = tp_vfts[rmt->transport_proto].open (tep);
+ if (rv < 0)
+ {
+ SESSION_DBG ("Transport failed to open connection.");
+ return VNET_API_ERROR_SESSION_CONNECT;
+ }
+
+ tc = tp_vfts[rmt->transport_proto].get_half_open ((u32) rv);
+
+ /* For dgram type of service, allocate session and fifos now.
+ */
+ app = application_get (app_index);
+ sm = application_get_connect_segment_manager (app);
+
+ if (session_alloc_and_init (sm, tc, 1, &s))
+ return -1;
+ s->app_index = app->index;
+ s->session_state = SESSION_STATE_OPENED;
+
+ /* Tell the app about the new event fifo for this session */
+ app->cb_fns.session_connected_callback (app->index, opaque, s, 0);
+
+ return 0;
+}
+
+int
+session_open_vc (u32 app_index, session_endpoint_t * rmt, u32 opaque)
+{
+ transport_connection_t *tc;
+ transport_endpoint_t *tep;
u64 handle;
+ int rv;
tep = session_endpoint_to_transport (rmt);
rv = tp_vfts[rmt->transport_proto].open (tep);
/* If transport offers a stream service, only allocate session once the
* connection has been established.
+ * Add connection to half-open table and save app and tc index. The
+ * latter is needed to help establish the connection while the former
+ * is needed when the connect notify comes and we have to notify the
+ * external app
*/
- if (transport_is_stream (rmt->transport_proto))
- {
- /* Add connection to half-open table and save app and tc index. The
- * latter is needed to help establish the connection while the former
- * is needed when the connect notify comes and we have to notify the
- * external app
- */
- handle = (((u64) app_index) << 32) | (u64) tc->c_index;
- session_lookup_add_half_open (tc, handle);
-
- /* Store api_context (opaque) for when the reply comes. Not the nicest
- * thing but better than allocating a separate half-open pool.
- */
- tc->s_index = opaque;
- }
- /* For dgram type of service, allocate session and fifos now.
+ handle = (((u64) app_index) << 32) | (u64) tc->c_index;
+ session_lookup_add_half_open (tc, handle);
+
+ /* Store api_context (opaque) for when the reply comes. Not the nicest
+ * thing but better than allocating a separate half-open pool.
*/
- else
- {
- app = application_get (app_index);
- sm = application_get_connect_segment_manager (app);
+ tc->s_index = opaque;
+ return 0;
+}
- if (session_alloc_and_init (sm, tc, 1, &s))
- return -1;
- s->app_index = app->index;
- s->session_state = SESSION_STATE_CONNECTING_READY;
+int
+session_open_app (u32 app_index, session_endpoint_t * rmt, u32 opaque)
+{
+ session_endpoint_extended_t *sep = (session_endpoint_extended_t *) rmt;
+ sep->app_index = app_index;
+ sep->opaque = opaque;
- /* Tell the app about the new event fifo for this session */
- app->cb_fns.session_connected_callback (app->index, opaque, s, 0);
- }
- return 0;
+ return tp_vfts[rmt->transport_proto].open ((transport_endpoint_t *) sep);
}
+typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
+
+/* *INDENT-OFF* */
+static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
+ session_open_vc,
+ session_open_cl,
+ session_open_app,
+};
+/* *INDENT-ON* */
+
/**
- * Ask transport to listen on local transport endpoint.
+ * Ask transport to open connection to remote transport endpoint.
*
- * @param s Session for which listen will be called. Note that unlike
- * established sessions, listen sessions are not associated to a
- * thread.
- * @param tep Local endpoint to be listened on.
+ * Stores handle for matching request with reply since the call can be
+ * asynchronous. For instance, for TCP the 3-way handshake must complete
+ * before reply comes. Session is only created once connection is established.
+ *
+ * @param app_index Index of the application requesting the connect
+ * @param st Session type requested.
+ * @param tep Remote transport endpoint
+ * @param opaque Opaque data (typically, api_context) the application expects
+ * on open completion.
*/
int
-stream_session_listen (stream_session_t * s, session_endpoint_t * sep)
+session_open (u32 app_index, session_endpoint_t * rmt, u32 opaque)
+{
+ transport_service_type_t tst = tp_vfts[rmt->transport_proto].service_type;
+ return session_open_srv_fns[tst] (app_index, rmt, opaque);
+}
+
+int
+session_listen_vc (stream_session_t * s, session_endpoint_t * sep)
+{
+ transport_connection_t *tc;
+ u32 tci;
+
+ /* Transport bind/listen */
+ tci = tp_vfts[sep->transport_proto].bind (s->session_index,
+ session_endpoint_to_transport
+ (sep));
+
+ if (tci == (u32) ~ 0)
+ return -1;
+
+ /* Attach transport to session */
+ s->connection_index = tci;
+ tc = tp_vfts[sep->transport_proto].get_listener (tci);
+
+ /* Weird but handle it ... */
+ if (tc == 0)
+ return -1;
+
+ /* Add to the main lookup table */
+ session_lookup_add_connection (tc, s->session_index);
+ return 0;
+}
+
+int
+session_listen_cl (stream_session_t * s, session_endpoint_t * sep)
{
transport_connection_t *tc;
+ application_t *server;
+ segment_manager_t *sm;
u32 tci;
/* Transport bind/listen */
if (tc == 0)
return -1;
+ server = application_get (s->app_index);
+ sm = application_get_listen_segment_manager (server, s);
+ if (session_alloc_fifos (sm, s))
+ return -1;
+
/* Add to the main lookup table */
session_lookup_add_connection (tc, s->session_index);
return 0;
}
+int
+session_listen_app (stream_session_t * s, session_endpoint_t * sep)
+{
+ session_endpoint_extended_t esep;
+ clib_memcpy (&esep, sep, sizeof (*sep));
+ esep.app_index = s->app_index;
+
+ return tp_vfts[sep->transport_proto].bind (s->session_index,
+ (transport_endpoint_t *) & esep);
+}
+
+typedef int (*session_listen_service_fn) (stream_session_t *,
+ session_endpoint_t *);
+
+/* *INDENT-OFF* */
+static session_listen_service_fn
+session_listen_srv_fns[TRANSPORT_N_SERVICES] = {
+ session_listen_vc,
+ session_listen_cl,
+ session_listen_app,
+};
+/* *INDENT-ON* */
+
+/**
+ * Ask transport to listen on local transport endpoint.
+ *
+ * @param s Session for which listen will be called. Note that unlike
+ * established sessions, listen sessions are not associated to a
+ * thread.
+ * @param tep Local endpoint to be listened on.
+ */
+int
+stream_session_listen (stream_session_t * s, session_endpoint_t * sep)
+{
+ transport_service_type_t tst = tp_vfts[sep->transport_proto].service_type;
+ return session_listen_srv_fns[tst] (s, sep);
+}
+
/**
* Ask transport to stop listening on local transport endpoint.
*
void
stream_session_disconnect (stream_session_t * s)
{
- if (!s || s->session_state == SESSION_STATE_CLOSED)
+ u32 thread_index = vlib_get_thread_index ();
+ session_manager_main_t *smm = &session_manager_main;
+ session_fifo_event_t *evt;
+
+ if (!s)
return;
- s->session_state = SESSION_STATE_CLOSED;
- session_send_session_evt_to_thread (session_handle (s),
- FIFO_EVENT_DISCONNECT, s->thread_index);
+
+ if (s->session_state >= SESSION_STATE_CLOSING)
+ {
+ /* Session already closed. Clear the tx fifo */
+ if (s->session_state == SESSION_STATE_CLOSED)
+ svm_fifo_dequeue_drop_all (s->server_tx_fifo);
+ return;
+ }
+
+ s->session_state = SESSION_STATE_CLOSING;
+
+ /* If we are in the handler thread, or being called with the worker barrier
+ * held (api/cli), just append a new event to pending disconnects vector. */
+ if ((thread_index == 0 && !vlib_get_current_process (vlib_get_main ()))
+ || thread_index == s->thread_index)
+ {
+ ASSERT (s->thread_index == thread_index || thread_index == 0);
+ vec_add2 (smm->pending_disconnects[s->thread_index], evt, 1);
+ memset (evt, 0, sizeof (*evt));
+ evt->session_handle = session_handle (s);
+ evt->event_type = FIFO_EVENT_DISCONNECT;
+ }
+ else
+ session_send_session_evt_to_thread (session_handle (s),
+ FIFO_EVENT_DISCONNECT,
+ s->thread_index);
}
/**
/**
* Cleanup transport and session state.
*
- * Notify transport of the cleanup, wait for a delete notify to actually
- * remove the session state.
+ * Notify transport of the cleanup and free the session. This should
+ * be called only if transport reported some error and is already
+ * closed.
*/
void
stream_session_cleanup (stream_session_t * s)
{
- int rv;
-
s->session_state = SESSION_STATE_CLOSED;
- /* Delete from the main lookup table to avoid more enqueues */
- rv = session_lookup_del_session (s);
- if (rv)
- clib_warning ("hash delete error, rv %d", rv);
-
+ /* Delete from main lookup table before we axe the the transport */
+ session_lookup_del_session (s);
tp_vfts[session_get_transport_proto (s)].cleanup (s->connection_index,
s->thread_index);
+ /* Since we called cleanup, no delete notification will come. So, make
+ * sure the session is properly freed. */
+ segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
+ s->server_tx_fifo);
+ session_free (s);
+}
+
+transport_service_type_t
+session_transport_service_type (stream_session_t * s)
+{
+ transport_proto_t tp;
+ tp = session_get_transport_proto (s);
+ return transport_protocol_service_type (tp);
+}
+
+transport_tx_fn_type_t
+session_transport_tx_fn_type (stream_session_t * s)
+{
+ transport_proto_t tp;
+ tp = session_get_transport_proto (s);
+ return transport_protocol_tx_fn_type (tp);
+}
+
+u8
+session_tx_is_dgram (stream_session_t * s)
+{
+ return (session_transport_tx_fn_type (s) == TRANSPORT_TX_DGRAM);
}
/**
return 0;
}
+/* *INDENT-OFF* */
+static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
+ session_tx_fifo_peek_and_snd,
+ session_tx_fifo_dequeue_and_snd,
+ session_tx_fifo_dequeue_internal,
+ session_tx_fifo_dequeue_and_snd
+};
+/* *INDENT-ON* */
+
/**
* Initialize session layer for given transport proto and ip version
*
session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
vec_validate (smm->session_type_to_next, session_type);
- vec_validate (smm->listen_sessions, session_type);
vec_validate (smm->session_tx_fns, session_type);
/* *INDENT-OFF* */
- foreach_vlib_main (({
- next_index = vlib_node_add_next (this_vlib_main, session_queue_node.index,
- output_node);
- }));
+ if (output_node != ~0)
+ {
+ foreach_vlib_main (({
+ next_index = vlib_node_add_next (this_vlib_main,
+ session_queue_node.index,
+ output_node);
+ }));
+ }
/* *INDENT-ON* */
smm->session_type_to_next[session_type] = next_index;
- session_manager_set_transport_rx_fn (session_type,
- vft->tx_fifo_offset != 0);
+ smm->session_tx_fns[session_type] = session_tx_fns[vft->tx_type];
}
transport_connection_t *
return 0;
}
+void
+session_flush_frames_main_thread (vlib_main_t * vm)
+{
+ ASSERT (vlib_get_thread_index () == 0);
+ vlib_process_signal_event_mt (vm, session_queue_process_node.index,
+ SESSION_Q_PROCESS_FLUSH_FRAMES, 0);
+}
+
static clib_error_t *
session_manager_main_enable (vlib_main_t * vm)
{
segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
session_manager_main_t *smm = &session_manager_main;
vlib_thread_main_t *vtm = vlib_get_thread_main ();
- u32 num_threads;
- u32 preallocated_sessions_per_worker;
+ u32 num_threads, preallocated_sessions_per_worker;
int i, j;
num_threads = 1 /* main thread */ + vtm->n_threads;
vec_validate (smm->free_event_vector, num_threads - 1);
vec_validate (smm->vpp_event_queues, num_threads - 1);
vec_validate (smm->peekers_rw_locks, num_threads - 1);
+ vec_validate_aligned (smm->ctx, num_threads - 1, CLIB_CACHE_LINE_BYTES);
for (i = 0; i < TRANSPORT_N_PROTO; i++)
- for (j = 0; j < num_threads; j++)
- {
- vec_validate (smm->session_to_enqueue[i], num_threads - 1);
- vec_validate (smm->current_enqueue_epoch[i], num_threads - 1);
- }
+ {
+ vec_validate (smm->current_enqueue_epoch[i], num_threads - 1);
+ vec_validate (smm->session_to_enqueue[i], num_threads - 1);
+ for (j = 0; j < num_threads; j++)
+ smm->current_enqueue_epoch[i][j] = 1;
+ }
for (i = 0; i < num_threads; i++)
{
clib_rwlock_init (&smm->peekers_rw_locks[i]);
}
-#if SESSION_DBG
+#if SESSION_DEBUG
vec_validate (smm->last_event_poll_by_thread, num_threads - 1);
#endif
session_node_enable_disable (u8 is_en)
{
u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ u8 have_workers = vtm->n_threads != 0;
+
/* *INDENT-OFF* */
foreach_vlib_main (({
+ if (have_workers && ii == 0)
+ {
+ vlib_node_set_state (this_vlib_main, session_queue_process_node.index,
+ state);
+ if (is_en)
+ {
+ vlib_node_t *n = vlib_get_node (this_vlib_main,
+ session_queue_process_node.index);
+ vlib_start_process (this_vlib_main, n->runtime_index);
+ }
+ else
+ {
+ vlib_process_signal_event_mt (this_vlib_main,
+ session_queue_process_node.index,
+ SESSION_Q_PROCESS_STOP, 0);
+ }
+
+ continue;
+ }
vlib_node_set_state (this_vlib_main, session_queue_node.index,
state);
}));
Code Review / vpp.git / blobdiff