/*
- * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
#include <vnet/session/session.h>
#include <vnet/session/session_debug.h>
#include <vnet/session/application.h>
-#include <vlibmemory/api.h>
#include <vnet/dpo/load_balance.h>
#include <vnet/fib/ip4_fib.h>
-#include <vnet/tcp/tcp.h>
session_manager_main_t session_manager_main;
-extern transport_proto_vft_t *tp_vfts;
-static void
-session_send_evt_to_thread (u64 session_handle, fifo_event_type_t evt_type,
- u32 thread_index, void *fp, void *rpc_args)
+static inline int
+session_send_evt_to_thread (void *data, void *args, u32 thread_index,
+ session_evt_type_t evt_type)
{
- u32 tries = 0;
- session_fifo_event_t evt = { {0}, };
- unix_shared_memory_queue_t *q;
-
- evt.event_type = evt_type;
- if (evt_type == FIFO_EVENT_RPC)
- {
- evt.rpc_args.fp = fp;
- evt.rpc_args.arg = rpc_args;
- }
- else
- evt.session_handle = session_handle;
+ session_event_t *evt;
+ svm_msg_q_msg_t msg;
+ svm_msg_q_t *mq;
+ u32 tries = 0, max_tries;
- q = session_manager_get_vpp_event_queue (thread_index);
- while (unix_shared_memory_queue_add (q, (u8 *) & evt, 1))
+ mq = session_manager_get_vpp_event_queue (thread_index);
+ while (svm_msg_q_try_lock (mq))
{
- 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 -1;
}
}
+ if (PREDICT_FALSE (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
+ {
+ svm_msg_q_unlock (mq);
+ return -2;
+ }
+ msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
+ if (PREDICT_FALSE (svm_msg_q_msg_is_invalid (&msg)))
+ {
+ svm_msg_q_unlock (mq);
+ return -2;
+ }
+ evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
+ evt->event_type = evt_type;
+ switch (evt_type)
+ {
+ case FIFO_EVENT_RPC:
+ evt->rpc_args.fp = data;
+ evt->rpc_args.arg = args;
+ break;
+ case FIFO_EVENT_APP_TX:
+ case SESSION_IO_EVT_TX_FLUSH:
+ case FIFO_EVENT_BUILTIN_RX:
+ evt->fifo = data;
+ break;
+ case FIFO_EVENT_BUILTIN_TX:
+ case FIFO_EVENT_DISCONNECT:
+ evt->session_handle = session_handle ((session_t *) data);
+ break;
+ default:
+ clib_warning ("evt unhandled!");
+ svm_msg_q_unlock (mq);
+ return -1;
+ }
+
+ svm_msg_q_add_and_unlock (mq, &msg);
+ return 0;
}
-void
-session_send_session_evt_to_thread (u64 session_handle,
- fifo_event_type_t evt_type,
- u32 thread_index)
+int
+session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type)
{
- session_send_evt_to_thread (session_handle, evt_type, thread_index, 0, 0);
+ return session_send_evt_to_thread (f, 0, f->master_thread_index, evt_type);
+}
+
+int
+session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
+ session_evt_type_t evt_type)
+{
+ return session_send_evt_to_thread (data, 0, thread_index, evt_type);
+}
+
+int
+session_send_ctrl_evt_to_thread (session_t * s, session_evt_type_t evt_type)
+{
+ /* only event supported for now is disconnect */
+ ASSERT (evt_type == FIFO_EVENT_DISCONNECT);
+ return session_send_evt_to_thread (s, 0, s->thread_index,
+ FIFO_EVENT_DISCONNECT);
}
void
session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args)
{
if (thread_index != vlib_get_thread_index ())
- session_send_evt_to_thread (0, FIFO_EVENT_RPC, thread_index, fp,
- rpc_args);
+ session_send_evt_to_thread (fp, rpc_args, thread_index, FIFO_EVENT_RPC);
else
{
void (*fnp) (void *) = fp;
}
}
-stream_session_t *
+static void
+session_program_transport_close (session_t * s)
+{
+ u32 thread_index = vlib_get_thread_index ();
+ session_manager_worker_t *wrk;
+ session_event_t *evt;
+
+ if (!session_has_transport (s))
+ {
+ /* Polling may not be enabled on main thread so close now */
+ session_transport_close (s);
+ return;
+ }
+
+ /* If we are in the handler thread, or being called with the worker barrier
+ * held, just append a new event to pending disconnects vector. */
+ if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index)
+ {
+ wrk = session_manager_get_worker (s->thread_index);
+ vec_add2 (wrk->pending_disconnects, evt, 1);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->session_handle = session_handle (s);
+ evt->event_type = FIFO_EVENT_DISCONNECT;
+ }
+ else
+ session_send_ctrl_evt_to_thread (s, FIFO_EVENT_DISCONNECT);
+}
+
+session_t *
session_alloc (u32 thread_index)
{
- session_manager_main_t *smm = &session_manager_main;
- stream_session_t *s;
+ session_manager_worker_t *wrk = &session_manager_main.wrk[thread_index];
+ session_t *s;
u8 will_expand = 0;
- pool_get_aligned_will_expand (smm->sessions[thread_index], will_expand,
+ pool_get_aligned_will_expand (wrk->sessions, will_expand,
CLIB_CACHE_LINE_BYTES);
/* If we have peekers, let them finish */
- if (PREDICT_FALSE (will_expand))
+ if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
{
- clib_spinlock_lock_if_init (&smm->peekers_write_locks[thread_index]);
- pool_get_aligned (session_manager_main.sessions[thread_index], s,
- CLIB_CACHE_LINE_BYTES);
- clib_spinlock_unlock_if_init (&smm->peekers_write_locks[thread_index]);
+ clib_rwlock_writer_lock (&wrk->peekers_rw_locks);
+ pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
+ clib_rwlock_writer_unlock (&wrk->peekers_rw_locks);
}
else
{
- pool_get_aligned (session_manager_main.sessions[thread_index], s,
- CLIB_CACHE_LINE_BYTES);
+ pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
}
- memset (s, 0, sizeof (*s));
- s->session_index = s - session_manager_main.sessions[thread_index];
+ clib_memset (s, 0, sizeof (*s));
+ s->session_index = s - wrk->sessions;
s->thread_index = thread_index;
return s;
}
-static void
-session_free (stream_session_t * s)
+void
+session_free (session_t * s)
{
- pool_put (session_manager_main.sessions[s->thread_index], s);
+ pool_put (session_manager_main.wrk[s->thread_index].sessions, s);
if (CLIB_DEBUG)
- memset (s, 0xFA, sizeof (*s));
+ clib_memset (s, 0xFA, sizeof (*s));
}
-static int
-session_alloc_fifos (segment_manager_t * sm, stream_session_t * s)
+void
+session_free_w_fifos (session_t * s)
{
- svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
- u32 fifo_segment_index;
- int rv;
+ segment_manager_dealloc_fifos (s->svm_segment_index, s->rx_fifo,
+ s->tx_fifo);
+ session_free (s);
+}
- if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo,
- &server_tx_fifo,
- &fifo_segment_index)))
- return rv;
- /* Initialize backpointers */
- server_rx_fifo->master_session_index = s->session_index;
- server_rx_fifo->master_thread_index = s->thread_index;
+/**
+ * Cleans up session and lookup table.
+ *
+ * Transport connection must still be valid.
+ */
+static void
+session_delete (session_t * s)
+{
+ int rv;
- server_tx_fifo->master_session_index = s->session_index;
- server_tx_fifo->master_thread_index = s->thread_index;
+ /* Delete from the main lookup table. */
+ if ((rv = session_lookup_del_session (s)))
+ clib_warning ("hash delete error, rv %d", rv);
- s->server_rx_fifo = server_rx_fifo;
- s->server_tx_fifo = server_tx_fifo;
- s->svm_segment_index = fifo_segment_index;
- return 0;
+ session_free_w_fifos (s);
}
-static stream_session_t *
+static session_t *
session_alloc_for_connection (transport_connection_t * tc)
{
- stream_session_t *s;
+ 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);
- s->session_state = SESSION_STATE_CONNECTING;
+ s->enqueue_epoch = (u64) ~ 0;
+ s->session_state = SESSION_STATE_CLOSED;
/* Attach transport to session and vice versa */
s->connection_index = tc->c_index;
return s;
}
-static int
-session_alloc_and_init (segment_manager_t * sm, transport_connection_t * tc,
- u8 alloc_fifos, stream_session_t ** ret_s)
-{
- stream_session_t *s;
- int rv;
-
- s = session_alloc_for_connection (tc);
- if (alloc_fifos && (rv = session_alloc_fifos (sm, s)))
- {
- session_free (s);
- *ret_s = 0;
- return rv;
- }
-
- /* Add to the main lookup table */
- session_lookup_add_connection (tc, session_handle (s));
-
- *ret_s = s;
- return 0;
-}
-
/**
* Discards bytes from buffer chain
*
* Enqueue buffer chain tail
*/
always_inline int
-session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b,
+session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b,
u32 offset, u8 is_in_order)
{
vlib_buffer_t *chain_b;
continue;
if (is_in_order)
{
- rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data);
+ rv = svm_fifo_enqueue_nowait (s->rx_fifo, len, data);
if (rv == len)
{
written += rv;
}
else
{
- rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len,
- data);
+ rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data);
if (rv)
{
clib_warning ("failed to enqueue multi-buffer seg");
vlib_buffer_t * b, u32 offset,
u8 queue_event, u8 is_in_order)
{
- stream_session_t *s;
+ session_t *s;
int enqueued = 0, rv, in_order_off;
s = session_get (tc->s_index, tc->thread_index);
if (is_in_order)
{
- enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo,
+ enqueued = svm_fifo_enqueue_nowait (s->rx_fifo,
b->current_length,
vlib_buffer_get_current (b));
if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
}
else
{
- rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset,
+ rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset,
b->current_length,
vlib_buffer_get_current (b));
if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
{
/* Queue RX event on this fifo. Eventually these will need to be flushed
* by calling stream_server_flush_enqueue_events () */
- session_manager_main_t *smm = vnet_get_session_manager_main ();
- u32 thread_index = s->thread_index;
- u32 enqueue_epoch = smm->current_enqueue_epoch[tc->proto][thread_index];
+ session_manager_worker_t *wrk;
- if (s->enqueue_epoch != enqueue_epoch)
+ wrk = session_manager_get_worker (s->thread_index);
+ if (s->enqueue_epoch != wrk->current_enqueue_epoch[tc->proto])
{
- s->enqueue_epoch = enqueue_epoch;
- vec_add1 (smm->session_to_enqueue[tc->proto][thread_index],
- s - smm->sessions[thread_index]);
+ s->enqueue_epoch = wrk->current_enqueue_epoch[tc->proto];
+ vec_add1 (wrk->session_to_enqueue[tc->proto], s->session_index);
}
}
}
int
-session_enqueue_dgram_connection (stream_session_t * s, vlib_buffer_t * b,
- u8 proto, u8 queue_event)
+session_enqueue_dgram_connection (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;
- enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, b->current_length,
+ ASSERT (svm_fifo_max_enqueue (s->rx_fifo)
+ >= b->current_length + sizeof (*hdr));
+
+ svm_fifo_enqueue_nowait (s->rx_fifo, sizeof (session_dgram_hdr_t),
+ (u8 *) hdr);
+ enqueued = svm_fifo_enqueue_nowait (s->rx_fifo, b->current_length,
vlib_buffer_get_current (b));
if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
{
{
/* Queue RX event on this fifo. Eventually these will need to be flushed
* by calling stream_server_flush_enqueue_events () */
- session_manager_main_t *smm = vnet_get_session_manager_main ();
- u32 thread_index = s->thread_index;
- u32 enqueue_epoch = smm->current_enqueue_epoch[proto][thread_index];
+ session_manager_worker_t *wrk;
- if (s->enqueue_epoch != enqueue_epoch)
+ wrk = session_manager_get_worker (s->thread_index);
+ if (s->enqueue_epoch != wrk->current_enqueue_epoch[proto])
{
- s->enqueue_epoch = enqueue_epoch;
- vec_add1 (smm->session_to_enqueue[proto][thread_index],
- s - smm->sessions[thread_index]);
+ s->enqueue_epoch = wrk->current_enqueue_epoch[proto];
+ vec_add1 (wrk->session_to_enqueue[proto], s->session_index);
}
}
return enqueued;
stream_session_no_space (transport_connection_t * tc, u32 thread_index,
u16 data_len)
{
- stream_session_t *s = session_get (tc->s_index, thread_index);
+ session_t *s = session_get (tc->s_index, thread_index);
if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY))
return 1;
- if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo))
+ if (data_len > svm_fifo_max_enqueue (s->rx_fifo))
return 1;
return 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)
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ if (!s->tx_fifo)
return 0;
- return svm_fifo_max_dequeue (s->server_tx_fifo);
+ return svm_fifo_max_dequeue (s->tx_fifo);
}
int
stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer,
u32 offset, u32 max_bytes)
{
- stream_session_t *s = session_get (tc->s_index, tc->thread_index);
- return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer);
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer);
}
u32
-stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
+session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
{
- stream_session_t *s = session_get (tc->s_index, tc->thread_index);
- return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes);
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_dequeue_drop (s->tx_fifo, max_bytes);
+}
+
+static inline int
+session_notify_subscribers (u32 app_index, session_t * s,
+ svm_fifo_t * f, session_evt_type_t evt_type)
+{
+ app_worker_t *app_wrk;
+ application_t *app;
+ int i;
+
+ app = application_get (app_index);
+ if (!app)
+ return -1;
+
+ for (i = 0; i < f->n_subscribers; i++)
+ {
+ app_wrk = application_get_worker (app, f->subscribers[i]);
+ if (!app_wrk)
+ continue;
+ if (app_worker_lock_and_send_event (app_wrk, s, evt_type))
+ return -1;
+ }
+
+ return 0;
}
/**
* Notify session peer that new data has been enqueued.
*
- * @param s Stream session for which the event is to be generated.
- * @param block Flag to indicate if call should block if event queue is full.
+ * @param s Stream session for which the event is to be generated.
+ * @param lock Flag to indicate if call should lock message queue.
*
- * @return 0 on succes or negative number if failed to send notification.
+ * @return 0 on success or negative number if failed to send notification.
*/
-static int
-session_enqueue_notify (stream_session_t * s, u8 block)
+static inline int
+session_enqueue_notify (session_t * s)
{
- application_t *app;
- session_fifo_event_t evt;
- unix_shared_memory_queue_t *q;
+ app_worker_t *app_wrk;
- if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
+ if (PREDICT_FALSE (!app_wrk))
{
- /* 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);
+ SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index);
return 0;
}
- /* Get session's server */
- app = application_get_if_valid (s->app_index);
+ /* *INDENT-OFF* */
+ SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({
+ ed->data[0] = FIFO_EVENT_APP_RX;
+ ed->data[1] = svm_fifo_max_dequeue (s->rx_fifo);
+ }));
+ /* *INDENT-ON* */
+
+ if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
+ FIFO_EVENT_APP_RX)))
+ return -1;
- if (PREDICT_FALSE (app == 0))
- {
- clib_warning ("invalid s->app_index = %d", s->app_index);
- return 0;
- }
+ if (PREDICT_FALSE (svm_fifo_n_subscribers (s->rx_fifo)))
+ return session_notify_subscribers (app_wrk->app_index, s,
+ s->rx_fifo, FIFO_EVENT_APP_RX);
- /* 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);
+ return 0;
+}
- /* If no event, send one */
- if (svm_fifo_set_event (s->server_rx_fifo))
- {
- /* Fabricate event */
- evt.fifo = s->server_rx_fifo;
- evt.event_type = FIFO_EVENT_APP_RX;
+int
+session_dequeue_notify (session_t * s)
+{
+ app_worker_t *app_wrk;
- /* Add event to server's event queue */
- q = app->event_queue;
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
+ if (PREDICT_FALSE (!app_wrk))
+ return -1;
- /* Based on request block (or not) for lack of space */
- if (block || PREDICT_TRUE (q->cursize < q->maxsize))
- unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt,
- 0 /* do wait for mutex */ );
- else
- {
- clib_warning ("fifo full");
- return -1;
- }
- }
+ if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
+ FIFO_EVENT_APP_TX)))
+ return -1;
- /* *INDENT-OFF* */
- SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({
- ed->data[0] = evt.event_type;
- ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo);
- }));
- /* *INDENT-ON* */
+ if (PREDICT_FALSE (s->tx_fifo->n_subscribers))
+ return session_notify_subscribers (app_wrk->app_index, s,
+ s->tx_fifo, FIFO_EVENT_APP_TX);
+
+ svm_fifo_clear_tx_ntf (s->tx_fifo);
return 0;
}
int
session_manager_flush_enqueue_events (u8 transport_proto, u32 thread_index)
{
- session_manager_main_t *smm = &session_manager_main;
- u32 *indices;
- stream_session_t *s;
+ session_manager_worker_t *wrk = session_manager_get_worker (thread_index);
+ session_t *s;
int i, errors = 0;
+ u32 *indices;
- indices = smm->session_to_enqueue[transport_proto][thread_index];
+ indices = wrk->session_to_enqueue[transport_proto];
for (i = 0; i < vec_len (indices); i++)
{
s = session_get_if_valid (indices[i], thread_index);
- if (s == 0 || session_enqueue_notify (s, 0 /* don't block */ ))
+ if (PREDICT_FALSE (!s))
+ {
+ errors++;
+ continue;
+ }
+ if (PREDICT_FALSE (session_enqueue_notify (s)))
errors++;
}
vec_reset_length (indices);
- smm->session_to_enqueue[transport_proto][thread_index] = indices;
- smm->current_enqueue_epoch[transport_proto][thread_index]++;
+ wrk->session_to_enqueue[transport_proto] = indices;
+ wrk->current_enqueue_epoch[transport_proto]++;
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
*
stream_session_init_fifos_pointers (transport_connection_t * tc,
u32 rx_pointer, u32 tx_pointer)
{
- stream_session_t *s;
+ session_t *s;
s = session_get (tc->s_index, tc->thread_index);
- svm_fifo_init_pointers (s->server_rx_fifo, rx_pointer);
- svm_fifo_init_pointers (s->server_tx_fifo, tx_pointer);
+ svm_fifo_init_pointers (s->rx_fifo, rx_pointer);
+ svm_fifo_init_pointers (s->tx_fifo, tx_pointer);
}
int
session_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
{
- application_t *app;
- stream_session_t *new_s = 0;
- u64 handle;
- u32 opaque = 0;
- int error = 0;
- segment_manager_t *sm;
- u8 alloc_fifos;
+ u32 opaque = 0, new_ti, new_si;
+ app_worker_t *app_wrk;
+ session_t *s = 0;
+ u64 ho_handle;
/*
* Find connection handle and cleanup half-open table
*/
- handle = session_lookup_half_open_handle (tc);
- if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
+ ho_handle = session_lookup_half_open_handle (tc);
+ if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
{
SESSION_DBG ("half-open was removed!");
return -1;
/* Get the app's index from the handle we stored when opening connection
* and the opaque (api_context for external apps) from transport session
* index */
- app = application_get_if_valid (handle >> 32);
- if (!app)
+ app_wrk = app_worker_get_if_valid (ho_handle >> 32);
+ if (!app_wrk)
return -1;
+
opaque = tc->s_index;
- /*
- * Allocate new session with fifos (svm segments are allocated if needed)
- */
- if (!is_fail)
- {
- sm = application_get_connect_segment_manager (app);
- alloc_fifos = !application_is_builtin_proxy (app);
- if (session_alloc_and_init (sm, tc, alloc_fifos, &new_s))
- {
- is_fail = 1;
- error = -1;
- }
- else
- new_s->app_index = app->index;
- }
+ if (is_fail)
+ return app_worker_connect_notify (app_wrk, s, opaque);
- /*
- * Notify client application
- */
- if (app->cb_fns.session_connected_callback (app->index, opaque, new_s,
- is_fail))
+ s = session_alloc_for_connection (tc);
+ s->session_state = SESSION_STATE_CONNECTING;
+ s->app_wrk_index = app_wrk->wrk_index;
+ new_si = s->session_index;
+ new_ti = s->thread_index;
+
+ if (app_worker_init_connected (app_wrk, s))
{
- SESSION_DBG ("failed to notify app");
- if (!is_fail)
- stream_session_disconnect (new_s);
+ session_free (s);
+ app_worker_connect_notify (app_wrk, 0, opaque);
+ return -1;
}
- else
+
+ if (app_worker_connect_notify (app_wrk, s, opaque))
{
- if (!is_fail)
- new_s->session_state = SESSION_STATE_READY;
+ s = session_get (new_si, new_ti);
+ session_free_w_fifos (s);
+ return -1;
}
- return error;
+ s = session_get (new_si, new_ti);
+ s->session_state = SESSION_STATE_READY;
+ session_lookup_add_connection (tc, session_handle (s));
+
+ return 0;
}
typedef struct _session_switch_pool_args
session_switch_pool (void *cb_args)
{
session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
- stream_session_t *s;
+ session_t *s;
ASSERT (args->thread_index == vlib_get_thread_index ());
s = session_get (args->session_index, args->thread_index);
- s->server_tx_fifo->master_session_index = args->new_session_index;
- s->server_tx_fifo->master_thread_index = args->new_thread_index;
- tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
+ s->tx_fifo->master_session_index = args->new_session_index;
+ s->tx_fifo->master_thread_index = args->new_thread_index;
+ transport_cleanup (session_get_transport_proto (s), s->connection_index,
+ s->thread_index);
session_free (s);
clib_mem_free (cb_args);
}
*/
int
session_dgram_connect_notify (transport_connection_t * tc,
- u32 old_thread_index,
- stream_session_t ** new_session)
+ u32 old_thread_index, session_t ** new_session)
{
- stream_session_t *new_s;
+ session_t *new_s;
session_switch_pool_args_t *rpc_args;
/*
*/
new_s = session_clone_safe (tc->s_index, old_thread_index);
new_s->connection_index = tc->c_index;
- new_s->server_rx_fifo->master_session_index = new_s->session_index;
- new_s->server_rx_fifo->master_thread_index = new_s->thread_index;
+ new_s->rx_fifo->master_session_index = new_s->session_index;
+ new_s->rx_fifo->master_thread_index = new_s->thread_index;
new_s->session_state = SESSION_STATE_READY;
session_lookup_add_connection (tc, session_handle (new_s));
return 0;
}
-void
-stream_session_accept_notify (transport_connection_t * tc)
-{
- application_t *server;
- stream_session_t *s;
-
- s = session_get (tc->s_index, tc->thread_index);
- server = application_get (s->app_index);
- server->cb_fns.session_accept_callback (s);
-}
-
/**
* Notification from transport that connection is being closed.
*
* Ultimately this leads to close being called on transport (passive close).
*/
void
-stream_session_disconnect_notify (transport_connection_t * tc)
+session_transport_closing_notify (transport_connection_t * tc)
{
- application_t *server;
- stream_session_t *s;
+ app_worker_t *app_wrk;
+ application_t *app;
+ session_t *s;
s = session_get (tc->s_index, tc->thread_index);
- server = application_get (s->app_index);
- server->cb_fns.session_disconnect_callback (s);
+ if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ return;
+ s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
+ if (!app_wrk)
+ return;
+ app = application_get (app_wrk->app_index);
+ app->cb_fns.session_disconnect_callback (s);
}
/**
- * Cleans up session and lookup table.
+ * Notification from transport that connection is being deleted
+ *
+ * This removes the session if it is still valid. It should be called only on
+ * previously fully established sessions. For instance failed connects should
+ * call stream_session_connect_notify and indicate that the connect has
+ * failed.
*/
void
-stream_session_delete (stream_session_t * s)
+session_transport_delete_notify (transport_connection_t * tc)
{
- int rv;
+ session_t *s;
- /* Delete from the main lookup table. */
- if ((rv = session_lookup_del_session (s)))
- clib_warning ("hash delete error, rv %d", rv);
+ /* App might've been removed already */
+ if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
+ return;
- /* Cleanup fifo segments */
- segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
- s->server_tx_fifo);
- session_free (s);
+ /* Make sure we don't try to send anything more */
+ svm_fifo_dequeue_drop_all (s->tx_fifo);
+
+ switch (s->session_state)
+ {
+ case SESSION_STATE_CREATED:
+ /* Session was created but accept notification was not yet sent to the
+ * app. Cleanup everything. */
+ session_lookup_del_session (s);
+ session_free_w_fifos (s);
+ break;
+ case SESSION_STATE_ACCEPTING:
+ case SESSION_STATE_TRANSPORT_CLOSING:
+ /* If transport finishes or times out before we get a reply
+ * from the app, mark transport as closed and wait for reply
+ * before removing the session. Cleanup session table in advance
+ * because transport will soon be closed and closed sessions
+ * are assumed to have been removed from the lookup table */
+ session_lookup_del_session (s);
+ s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
+ break;
+ case SESSION_STATE_CLOSING:
+ case SESSION_STATE_CLOSED_WAITING:
+ /* Cleanup lookup table as transport needs to still be valid.
+ * Program transport close to ensure that all session events
+ * have been cleaned up. Once transport close is called, the
+ * session is just removed because both transport and app have
+ * confirmed the close*/
+ session_lookup_del_session (s);
+ s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
+ session_program_transport_close (s);
+ break;
+ case SESSION_STATE_TRANSPORT_CLOSED:
+ break;
+ case SESSION_STATE_CLOSED:
+ session_delete (s);
+ break;
+ default:
+ clib_warning ("session state %u", s->session_state);
+ session_delete (s);
+ break;
+ }
}
/**
- * Notification from transport that connection is being deleted
+ * Notification from transport that session can be closed
*
- * This removes the session if it is still valid. It should be called only on
- * previously fully established sessions. For instance failed connects should
- * call stream_session_connect_notify and indicate that the connect has
- * failed.
+ * Should be called by transport only if it was closed with non-empty
+ * tx fifo and once it decides to begin the closing procedure prior to
+ * issuing a delete notify. This gives the chance to the session layer
+ * to cleanup any outstanding events.
*/
void
-stream_session_delete_notify (transport_connection_t * tc)
+session_transport_closed_notify (transport_connection_t * tc)
{
- stream_session_t *s;
+ session_t *s;
- /* App might've been removed already */
- s = session_get_if_valid (tc->s_index, tc->thread_index);
- if (!s)
+ if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
return;
- stream_session_delete (s);
+
+ /* If app close has not been received or has not yet resulted in
+ * a transport close, only mark the session transport as closed */
+ if (s->session_state <= SESSION_STATE_CLOSING)
+ {
+ session_lookup_del_session (s);
+ s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
+ }
+ else
+ s->session_state = SESSION_STATE_CLOSED;
}
/**
* Notify application that connection has been reset.
*/
void
-stream_session_reset_notify (transport_connection_t * tc)
+session_transport_reset_notify (transport_connection_t * tc)
{
- stream_session_t *s;
+ session_t *s;
+ app_worker_t *app_wrk;
application_t *app;
s = session_get (tc->s_index, tc->thread_index);
-
- app = application_get (s->app_index);
+ svm_fifo_dequeue_drop_all (s->tx_fifo);
+ if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ return;
+ s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
+ app_wrk = app_worker_get (s->app_wrk_index);
+ app = application_get (app_wrk->app_index);
app->cb_fns.session_reset_callback (s);
}
+int
+session_stream_accept_notify (transport_connection_t * tc)
+{
+ app_worker_t *app_wrk;
+ session_t *s;
+
+ s = session_get (tc->s_index, tc->thread_index);
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
+ if (!app_wrk)
+ return -1;
+ s->session_state = SESSION_STATE_ACCEPTING;
+ return app_worker_accept_notify (app_wrk, s);
+}
+
/**
* Accept a stream session. Optionally ping the server by callback.
*/
int
-stream_session_accept (transport_connection_t * tc, u32 listener_index,
+session_stream_accept (transport_connection_t * tc, u32 listener_index,
u8 notify)
{
- application_t *server;
- stream_session_t *s, *listener;
- segment_manager_t *sm;
- session_type_t sst;
+ session_t *s;
int rv;
- sst = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
-
- /* Find the server */
- listener = listen_session_get (sst, listener_index);
- server = application_get (listener->app_index);
+ s = session_alloc_for_connection (tc);
+ s->listener_index = listener_index;
+ s->session_state = SESSION_STATE_CREATED;
- sm = application_get_listen_segment_manager (server, listener);
- if ((rv = session_alloc_and_init (sm, tc, 1, &s)))
+ if ((rv = app_worker_init_accepted (s)))
return rv;
- s->app_index = server->index;
- s->listener_index = listener_index;
- s->session_state = SESSION_STATE_ACCEPTING;
+ session_lookup_add_connection (tc, session_handle (s));
/* Shoulder-tap the server */
if (notify)
{
- server->cb_fns.session_accept_callback (s);
+ app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
+ return app_worker_accept_notify (app_wrk, s);
}
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_wrk_index, session_endpoint_t * rmt, u32 opaque)
{
transport_connection_t *tc;
- session_type_t sst;
- segment_manager_t *sm;
- stream_session_t *s;
- application_t *app;
+ transport_endpoint_cfg_t *tep;
+ app_worker_t *app_wrk;
+ session_t *s;
int rv;
+
+ tep = session_endpoint_to_transport_cfg (rmt);
+ rv = transport_connect (rmt->transport_proto, tep);
+ if (rv < 0)
+ {
+ SESSION_DBG ("Transport failed to open connection.");
+ return VNET_API_ERROR_SESSION_CONNECT;
+ }
+
+ tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
+
+ /* For dgram type of service, allocate session and fifos now */
+ app_wrk = app_worker_get (app_wrk_index);
+ s = session_alloc_for_connection (tc);
+ s->app_wrk_index = app_wrk->wrk_index;
+ s->session_state = SESSION_STATE_OPENED;
+ if (app_worker_init_connected (app_wrk, s))
+ {
+ session_free (s);
+ return -1;
+ }
+
+ return app_worker_connect_notify (app_wrk, s, opaque);
+}
+
+int
+session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
+{
+ transport_connection_t *tc;
+ transport_endpoint_cfg_t *tep;
u64 handle;
+ int rv;
- sst = session_type_from_proto_and_ip (rmt->transport_proto, rmt->is_ip4);
- rv = tp_vfts[sst].open (session_endpoint_to_transport (rmt));
+ tep = session_endpoint_to_transport_cfg (rmt);
+ rv = transport_connect (rmt->transport_proto, tep);
if (rv < 0)
{
SESSION_DBG ("Transport failed to open connection.");
return VNET_API_ERROR_SESSION_CONNECT;
}
- tc = tp_vfts[sst].get_half_open ((u32) rv);
+ tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
/* 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_wrk_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_wrk_index, session_endpoint_t * rmt, u32 opaque)
+{
+ session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
+ transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
- /* Tell the app about the new event fifo for this session */
- app->cb_fns.session_connected_callback (app->index, opaque, s, 0);
- }
- return 0;
+ sep->app_wrk_index = app_wrk_index;
+ sep->opaque = opaque;
+
+ return transport_connect (rmt->transport_proto, tep_cfg);
+}
+
+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 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_wrk_index, session_endpoint_t * rmt, u32 opaque)
+{
+ transport_service_type_t tst;
+ tst = transport_protocol_service_type (rmt->transport_proto);
+ return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
}
/**
- * Ask transport to listen on local transport endpoint.
+ * Ask transport to listen on session 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.
+ * @param sep Local endpoint to be listened on.
*/
int
-stream_session_listen (stream_session_t * s, session_endpoint_t * sep)
+session_listen (session_t * ls, session_endpoint_cfg_t * sep)
{
- transport_connection_t *tc;
- u32 tci;
+ transport_endpoint_t *tep;
+ u32 tc_index, s_index;
- /* Transport bind/listen */
- tci = tp_vfts[s->session_type].bind (s->session_index,
- session_endpoint_to_transport (sep));
+ /* Transport bind/listen */
+ tep = session_endpoint_to_transport (sep);
+ s_index = ls->session_index;
+ tc_index = transport_start_listen (session_get_transport_proto (ls),
+ s_index, tep);
- if (tci == (u32) ~ 0)
+ if (tc_index == (u32) ~ 0)
return -1;
- /* Attach transport to session */
- s->connection_index = tci;
- tc = tp_vfts[s->session_type].get_listener (tci);
-
- /* Weird but handle it ... */
- if (tc == 0)
- return -1;
+ /* Attach transport to session. Lookup tables are populated by the app
+ * worker because local tables (for ct sessions) are not backed by a fib */
+ ls = listen_session_get (s_index);
+ ls->connection_index = tc_index;
- /* Add to the main lookup table */
- session_lookup_add_connection (tc, s->session_index);
return 0;
}
* @param s Session to stop listening on. It must be in state LISTENING.
*/
int
-stream_session_stop_listen (stream_session_t * s)
+session_stop_listen (session_t * s)
{
+ transport_proto_t tp = session_get_transport_proto (s);
transport_connection_t *tc;
if (s->session_state != SESSION_STATE_LISTENING)
- {
- clib_warning ("not a listening session");
- return -1;
- }
+ return -1;
- tc = tp_vfts[s->session_type].get_listener (s->connection_index);
+ tc = transport_get_listener (tp, s->connection_index);
if (!tc)
- {
- clib_warning ("no transport");
- return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
- }
+ return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
session_lookup_del_connection (tc);
- tp_vfts[s->session_type].unbind (s->connection_index);
+ transport_stop_listen (tp, s->connection_index);
return 0;
}
/**
- * Disconnect session and propagate to transport. This should eventually
+ * Initialize session closing procedure.
+ *
+ * Request is always sent to session node to ensure that all outstanding
+ * requests are served before transport is notified.
+ */
+void
+session_close (session_t * s)
+{
+ if (!s)
+ return;
+
+ if (s->session_state >= SESSION_STATE_CLOSING)
+ {
+ /* Session will only be removed once both app and transport
+ * acknowledge the close */
+ if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
+ session_program_transport_close (s);
+
+ /* Session already closed. Clear the tx fifo */
+ if (s->session_state == SESSION_STATE_CLOSED)
+ svm_fifo_dequeue_drop_all (s->tx_fifo);
+ return;
+ }
+
+ s->session_state = SESSION_STATE_CLOSING;
+ session_program_transport_close (s);
+}
+
+/**
+ * Notify transport the session can be disconnected. This should eventually
* result in a delete notification that allows us to cleanup session state.
* Called for both active/passive disconnects.
*
- * Should be called from the session's thread.
+ * Must be called from the session's thread.
*/
void
-stream_session_disconnect (stream_session_t * s)
+session_transport_close (session_t * s)
{
- s->session_state = SESSION_STATE_CLOSED;
- tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
+ /* If transport is already closed, just free the session */
+ if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
+ {
+ session_free_w_fifos (s);
+ return;
+ }
+
+ /* If tx queue wasn't drained, change state to closed waiting for transport.
+ * This way, the transport, if it so wishes, can continue to try sending the
+ * outstanding data (in closed state it cannot). It MUST however at one
+ * point, either after sending everything or after a timeout, call delete
+ * notify. This will finally lead to the complete cleanup of the session.
+ */
+ if (svm_fifo_max_dequeue (s->tx_fifo))
+ s->session_state = SESSION_STATE_CLOSED_WAITING;
+ else
+ s->session_state = SESSION_STATE_CLOSED;
+
+ transport_close (session_get_transport_proto (s), s->connection_index,
+ 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)
+session_transport_cleanup (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);
-
- tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
+ /* Delete from main lookup table before we axe the the transport */
+ session_lookup_del_session (s);
+ transport_cleanup (session_get_transport_proto (s), s->connection_index,
+ s->thread_index);
+ /* Since we called cleanup, no delete notification will come. So, make
+ * sure the session is properly freed. */
+ session_free_w_fifos (s);
}
/**
- * Allocate vpp event queue (once) per worker thread
+ * Allocate event queues in the shared-memory segment
+ *
+ * That can either be a newly created memfd segment, that will need to be
+ * mapped by all stack users, or the binary api's svm region. The latter is
+ * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
+ * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
+ * vpp uses api svm region for event queues.
*/
void
-session_vpp_event_queue_allocate (session_manager_main_t * smm,
- u32 thread_index)
+session_vpp_event_queues_allocate (session_manager_main_t * smm)
{
+ u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
+ ssvm_private_t *eqs = &smm->evt_qs_segment;
api_main_t *am = &api_main;
+ uword eqs_size = 64 << 20;
+ pid_t vpp_pid = getpid ();
void *oldheap;
- u32 event_queue_length = 2048;
+ int i;
- if (smm->vpp_event_queues[thread_index] == 0)
- {
- /* Allocate event fifo in the /vpe-api shared-memory segment */
- oldheap = svm_push_data_heap (am->vlib_rp);
+ if (smm->configured_event_queue_length)
+ evt_q_length = smm->configured_event_queue_length;
- if (smm->configured_event_queue_length)
- event_queue_length = smm->configured_event_queue_length;
+ if (smm->evt_qs_use_memfd_seg)
+ {
+ if (smm->evt_qs_segment_size)
+ eqs_size = smm->evt_qs_segment_size;
- smm->vpp_event_queues[thread_index] =
- unix_shared_memory_queue_init
- (event_queue_length,
- sizeof (session_fifo_event_t), 0 /* consumer pid */ ,
- 0 /* (do not) send signal when queue non-empty */ );
+ eqs->ssvm_size = eqs_size;
+ eqs->i_am_master = 1;
+ eqs->my_pid = vpp_pid;
+ eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
+ eqs->requested_va = smm->session_baseva;
- svm_pop_heap (oldheap);
+ if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
+ {
+ clib_warning ("failed to initialize queue segment");
+ return;
+ }
}
-}
-session_type_t
-session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4)
-{
- if (proto == TRANSPORT_PROTO_TCP)
+ if (smm->evt_qs_use_memfd_seg)
+ oldheap = ssvm_push_heap (eqs->sh);
+ else
+ oldheap = svm_push_data_heap (am->vlib_rp);
+
+ for (i = 0; i < vec_len (smm->wrk); i++)
{
- if (is_ip4)
- return SESSION_TYPE_IP4_TCP;
- else
- return SESSION_TYPE_IP6_TCP;
+ svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
+ svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
+ {evt_q_length, evt_size, 0}
+ ,
+ {evt_q_length >> 1, 256, 0}
+ };
+ cfg->consumer_pid = 0;
+ cfg->n_rings = 2;
+ cfg->q_nitems = evt_q_length;
+ cfg->ring_cfgs = rc;
+ smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
+ if (smm->evt_qs_use_memfd_seg)
+ {
+ if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
+ clib_warning ("eventfd returned");
+ }
}
+
+ if (smm->evt_qs_use_memfd_seg)
+ ssvm_pop_heap (oldheap);
else
+ svm_pop_heap (oldheap);
+}
+
+ssvm_private_t *
+session_manager_get_evt_q_segment (void)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ if (smm->evt_qs_use_memfd_seg)
+ return &smm->evt_qs_segment;
+ 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
+ *
+ * Allocates per session type (transport proto + ip version) data structures
+ * and adds arc from session queue node to session type output node.
+ */
+void
+session_register_transport (transport_proto_t transport_proto,
+ const transport_proto_vft_t * vft, u8 is_ip4,
+ u32 output_node)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ session_type_t session_type;
+ u32 next_index = ~0;
+
+ session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
+
+ vec_validate (smm->session_type_to_next, session_type);
+ vec_validate (smm->session_tx_fns, session_type);
+
+ /* *INDENT-OFF* */
+ if (output_node != ~0)
{
- if (is_ip4)
- return SESSION_TYPE_IP4_UDP;
- else
- return SESSION_TYPE_IP6_UDP;
+ foreach_vlib_main (({
+ next_index = vlib_node_add_next (this_vlib_main,
+ session_queue_node.index,
+ output_node);
+ }));
}
+ /* *INDENT-ON* */
- return SESSION_N_TYPES;
+ smm->session_type_to_next[session_type] = next_index;
+ smm->session_tx_fns[session_type] = session_tx_fns[vft->tx_type];
}
transport_connection_t *
-session_get_transport (stream_session_t * s)
+session_get_transport (session_t * s)
{
if (s->session_state != SESSION_STATE_LISTENING)
- return tp_vfts[s->session_type].get_connection (s->connection_index,
- s->thread_index);
- return 0;
+ return transport_get_connection (session_get_transport_proto (s),
+ s->connection_index, s->thread_index);
+ else
+ return transport_get_listener (session_get_transport_proto (s),
+ s->connection_index);
}
transport_connection_t *
-listen_session_get_transport (stream_session_t * s)
+listen_session_get_transport (session_t * s)
{
- return tp_vfts[s->session_type].get_listener (s->connection_index);
+ return transport_get_listener (session_get_transport_proto (s),
+ s->connection_index);
}
int
-listen_session_get_local_session_endpoint (stream_session_t * listener,
+listen_session_get_local_session_endpoint (session_t * listener,
session_endpoint_t * sep)
{
transport_connection_t *tc;
- tc =
- tp_vfts[listener->session_type].get_listener (listener->connection_index);
+ tc = listen_session_get_transport (listener);
if (!tc)
{
clib_warning ("no transport");
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;
+ session_manager_worker_t *wrk;
int i, j;
num_threads = 1 /* main thread */ + vtm->n_threads;
if (num_threads < 1)
return clib_error_return (0, "n_thread_stacks not set");
- /* $$$ config parameters */
- svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ ,
- 20 /* timeout in seconds */ );
-
- /* configure per-thread ** vectors */
- vec_validate (smm->sessions, num_threads - 1);
- vec_validate (smm->tx_buffers, num_threads - 1);
- vec_validate (smm->pending_event_vector, num_threads - 1);
- vec_validate (smm->pending_disconnects, num_threads - 1);
- vec_validate (smm->free_event_vector, num_threads - 1);
- vec_validate (smm->vpp_event_queues, num_threads - 1);
- vec_validate (smm->session_peekers, num_threads - 1);
- vec_validate (smm->peekers_readers_locks, num_threads - 1);
- vec_validate (smm->peekers_write_locks, num_threads - 1);
+ /* Allocate cache line aligned worker contexts */
+ vec_validate_aligned (smm->wrk, 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);
- }
+ {
+ for (j = 0; j < num_threads; j++)
+ smm->wrk[j].current_enqueue_epoch[i] = 1;
+ }
for (i = 0; i < num_threads; i++)
{
- vec_validate (smm->free_event_vector[i], 0);
- _vec_len (smm->free_event_vector[i]) = 0;
- vec_validate (smm->pending_event_vector[i], 0);
- _vec_len (smm->pending_event_vector[i]) = 0;
- vec_validate (smm->pending_disconnects[i], 0);
- _vec_len (smm->pending_disconnects[i]) = 0;
+ wrk = &smm->wrk[i];
+ vec_validate (wrk->free_event_vector, 128);
+ _vec_len (wrk->free_event_vector) = 0;
+ vec_validate (wrk->pending_event_vector, 128);
+ _vec_len (wrk->pending_event_vector) = 0;
+ vec_validate (wrk->pending_disconnects, 128);
+ _vec_len (wrk->pending_disconnects) = 0;
+ vec_validate (wrk->postponed_event_vector, 128);
+ _vec_len (wrk->postponed_event_vector) = 0;
+
+ wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
+ wrk->dispatch_period = 500e-6;
+
if (num_threads > 1)
- {
- clib_spinlock_init (&smm->peekers_readers_locks[i]);
- clib_spinlock_init (&smm->peekers_write_locks[i]);
- }
+ clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
}
-#if SESSION_DBG
+#if SESSION_DEBUG
vec_validate (smm->last_event_poll_by_thread, num_threads - 1);
#endif
- /* Allocate vpp event queues */
- for (i = 0; i < vec_len (smm->vpp_event_queues); i++)
- session_vpp_event_queue_allocate (smm, i);
+ /* Allocate vpp event queues segment and queue */
+ session_vpp_event_queues_allocate (smm);
+
+ /* Initialize fifo segment main baseva and timeout */
+ sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
+ sm_args->size = smm->session_va_space_size;
+ segment_manager_main_init (sm_args);
/* Preallocate sessions */
if (smm->preallocated_sessions)
{
if (num_threads == 1)
{
- pool_init_fixed (smm->sessions[0], smm->preallocated_sessions);
+ pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
}
else
{
for (j = 1; j < num_threads; j++)
{
- pool_init_fixed (smm->sessions[j],
+ pool_init_fixed (smm->wrk[j].sessions,
preallocated_sessions_per_worker);
}
}
smm->is_enabled = 1;
- /* Enable TCP transport */
- vnet_tcp_enable_disable (vm, 1);
-
+ /* Enable transports */
+ transport_enable_disable (vm, 1);
+ transport_init_tx_pacers_period ();
return 0;
}
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);
}));
session_manager_main_init (vlib_main_t * vm)
{
session_manager_main_t *smm = &session_manager_main;
+ smm->session_baseva = HIGH_SEGMENT_BASEVA;
+#if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
+ smm->session_va_space_size = 128ULL << 30;
+ smm->evt_qs_segment_size = 64 << 20;
+#else
+ smm->session_va_space_size = 128 << 20;
+ smm->evt_qs_segment_size = 1 << 20;
+#endif
smm->is_enabled = 0;
return 0;
}
else if (unformat (input, "local-endpoints-table-buckets %d",
&smm->local_endpoints_table_buckets))
;
+ else if (unformat (input, "evt_qs_memfd_seg"))
+ smm->evt_qs_use_memfd_seg = 1;
+ else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
+ &smm->evt_qs_segment_size))
+ ;
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);