#include <vnet/session/application.h>
#include <vnet/dpo/load_balance.h>
#include <vnet/fib/ip4_fib.h>
+#include <vlib/stats/stats.h>
+#include <vlib/dma/dma.h>
session_main_t session_main;
session_send_evt_to_thread (void *data, void *args, u32 thread_index,
session_evt_type_t evt_type)
{
+ session_worker_t *wrk = session_main_get_worker (thread_index);
session_event_t *evt;
svm_msg_q_msg_t msg;
svm_msg_q_t *mq;
- mq = session_main_get_vpp_event_queue (thread_index);
+ mq = wrk->vpp_event_queue;
if (PREDICT_FALSE (svm_msg_q_lock (mq)))
return -1;
- if (PREDICT_FALSE (svm_msg_q_is_full (mq)
- || svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
+ if (PREDICT_FALSE (svm_msg_q_or_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
{
svm_msg_q_unlock (mq);
return -2;
evt->event_type = evt_type;
svm_msg_q_add_and_unlock (mq, &msg);
+
+ if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
+ vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
+
return 0;
}
int
session_send_ctrl_evt_to_thread (session_t * s, session_evt_type_t evt_type)
{
- /* only events supported are disconnect and reset */
- ASSERT (evt_type == SESSION_CTRL_EVT_CLOSE
- || evt_type == SESSION_CTRL_EVT_RESET);
+ /* only events supported are disconnect, shutdown and reset */
+ ASSERT (evt_type == SESSION_CTRL_EVT_CLOSE ||
+ evt_type == SESSION_CTRL_EVT_HALF_CLOSE ||
+ evt_type == SESSION_CTRL_EVT_RESET);
return session_send_evt_to_thread (s, 0, s->thread_index, evt_type);
}
void
session_add_self_custom_tx_evt (transport_connection_t * tc, u8 has_prio)
{
- session_t *s;
+ session_t *s = session_get (tc->s_index, tc->thread_index);
- s = session_get (tc->s_index, tc->thread_index);
ASSERT (s->thread_index == vlib_get_thread_index ());
ASSERT (s->session_state != SESSION_STATE_TRANSPORT_DELETED);
+
if (!(s->flags & SESSION_F_CUSTOM_TX))
{
s->flags |= SESSION_F_CUSTOM_TX;
if (svm_fifo_set_event (s->tx_fifo)
|| transport_connection_is_descheduled (tc))
{
- session_worker_t *wrk;
session_evt_elt_t *elt;
+ session_worker_t *wrk;
+
wrk = session_main_get_worker (tc->thread_index);
if (has_prio)
elt = session_evt_alloc_new (wrk);
elt->evt.session_index = tc->s_index;
elt->evt.event_type = SESSION_IO_EVT_TX;
tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED;
+
+ if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
+ vlib_node_set_interrupt_pending (wrk->vm,
+ session_queue_node.index);
}
}
}
elt = session_evt_alloc_new (wrk);
elt->evt.session_index = tc->s_index;
elt->evt.event_type = SESSION_IO_EVT_TX;
+
+ if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
+ vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
}
static void
clib_memset (&elt->evt, 0, sizeof (session_event_t));
elt->evt.session_handle = session_handle (s);
elt->evt.event_type = evt;
+
+ if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
+ vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
}
else
session_send_ctrl_evt_to_thread (s, evt);
{
session_worker_t *wrk = &session_main.wrk[thread_index];
session_t *s;
- u8 will_expand = 0;
- 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 && vlib_num_workers ()))
- {
- 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 (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
- }
+
+ pool_get_aligned_safe (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
clib_memset (s, 0, sizeof (*s));
s->session_index = s - wrk->sessions;
s->thread_index = thread_index;
s->app_index = APP_INVALID_INDEX;
+
return s;
}
void
session_free (session_t * s)
{
- if (CLIB_DEBUG)
- {
- u8 thread_index = s->thread_index;
- clib_memset (s, 0xFA, sizeof (*s));
- pool_put (session_main.wrk[thread_index].sessions, s);
- return;
- }
+ session_worker_t *wrk = &session_main.wrk[s->thread_index];
+
SESSION_EVT (SESSION_EVT_FREE, s);
- pool_put (session_main.wrk[s->thread_index].sessions, s);
+ if (CLIB_DEBUG)
+ clib_memset (s, 0xFA, sizeof (*s));
+ pool_put (wrk->sessions, s);
}
u8
|| s->session_state <= SESSION_STATE_LISTENING)
return 1;
+ if (s->session_state == SESSION_STATE_CONNECTING &&
+ (s->flags & SESSION_F_HALF_OPEN))
+ return 1;
+
tc = session_get_transport (s);
if (s->connection_index != tc->c_index
|| s->thread_index != tc->thread_index || tc->s_index != si)
}
void
-session_cleanup_half_open (transport_proto_t tp, session_handle_t ho_handle)
+session_cleanup_half_open (session_handle_t ho_handle)
{
- transport_cleanup_half_open (tp, session_handle_index (ho_handle));
+ session_t *ho = session_get_from_handle (ho_handle);
+
+ /* App transports can migrate their half-opens */
+ if (ho->flags & SESSION_F_IS_MIGRATING)
+ {
+ /* Session still migrating, move to closed state to signal that the
+ * session should be removed. */
+ if (ho->connection_index == ~0)
+ {
+ session_set_state (ho, SESSION_STATE_CLOSED);
+ return;
+ }
+ /* Migrated transports are no longer half-opens */
+ transport_cleanup (session_get_transport_proto (ho),
+ ho->connection_index, ho->app_index /* overloaded */);
+ }
+ else
+ transport_cleanup_half_open (session_get_transport_proto (ho),
+ ho->connection_index);
+ session_free (ho);
+}
+
+static void
+session_half_open_free (session_t *ho)
+{
+ app_worker_t *app_wrk;
+
+ ASSERT (vlib_get_thread_index () <= 1);
+ app_wrk = app_worker_get (ho->app_wrk_index);
+ app_worker_del_half_open (app_wrk, ho);
+ session_free (ho);
+}
+
+static void
+session_half_open_free_rpc (void *args)
+{
+ session_t *ho = ho_session_get (pointer_to_uword (args));
+ session_half_open_free (ho);
+}
+
+void
+session_half_open_delete_notify (transport_connection_t *tc)
+{
+ /* Notification from ctrl thread accepted without rpc */
+ if (!tc->thread_index)
+ {
+ session_half_open_free (ho_session_get (tc->s_index));
+ }
+ else
+ {
+ void *args = uword_to_pointer ((uword) tc->s_index, void *);
+ session_send_rpc_evt_to_thread_force (0, session_half_open_free_rpc,
+ args);
+ }
}
void
-session_half_open_delete_notify (transport_proto_t tp,
- session_handle_t ho_handle)
+session_half_open_migrate_notify (transport_connection_t *tc)
{
- app_worker_t *app_wrk = app_worker_get (session_handle_data (ho_handle));
- app_worker_del_half_open (app_wrk, tp, ho_handle);
+ session_t *ho;
+
+ ho = ho_session_get (tc->s_index);
+ ho->flags |= SESSION_F_IS_MIGRATING;
+ ho->connection_index = ~0;
+}
+
+int
+session_half_open_migrated_notify (transport_connection_t *tc)
+{
+ session_t *ho;
+
+ ho = ho_session_get (tc->s_index);
+
+ /* App probably detached so the half-open must be cleaned up */
+ if (ho->session_state == SESSION_STATE_CLOSED)
+ {
+ session_half_open_delete_notify (tc);
+ return -1;
+ }
+ ho->connection_index = tc->c_index;
+ /* Overload app index for half-open with new thread */
+ ho->app_index = tc->thread_index;
+ return 0;
}
session_t *
s = session_alloc (thread_index);
s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
- s->session_state = SESSION_STATE_CLOSED;
+ session_set_state (s, SESSION_STATE_CLOSED);
/* Attach transport to session and vice versa */
s->connection_index = tc->c_index;
return s;
}
+session_t *
+session_alloc_for_half_open (transport_connection_t *tc)
+{
+ session_t *s;
+
+ s = ho_session_alloc ();
+ s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
+ s->connection_index = tc->c_index;
+ tc->s_index = s->session_index;
+ return s;
+}
+
/**
* Discards bytes from buffer chain
*
session_stream_connect_notify (transport_connection_t * tc,
session_error_t err)
{
- session_handle_t ho_handle, wrk_handle;
u32 opaque = 0, new_ti, new_si;
app_worker_t *app_wrk;
- session_t *s = 0;
+ session_t *s = 0, *ho;
/*
- * Find connection handle and cleanup half-open table
+ * Cleanup half-open table
*/
- ho_handle = session_lookup_half_open_handle (tc);
- if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
- {
- SESSION_DBG ("half-open was removed!");
- return -1;
- }
session_lookup_del_half_open (tc);
- /* 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_wrk = app_worker_get_if_valid (session_handle_data (ho_handle));
+ ho = ho_session_get (tc->s_index);
+ opaque = ho->opaque;
+ app_wrk = app_worker_get_if_valid (ho->app_wrk_index);
if (!app_wrk)
return -1;
- wrk_handle = app_worker_lookup_half_open (app_wrk, tc->proto, ho_handle);
- if (wrk_handle == SESSION_INVALID_HANDLE)
- return -1;
-
- /* Make sure this is the same half-open index */
- if (session_handle_index (wrk_handle) != session_handle_index (ho_handle))
- return -1;
-
- opaque = session_handle_data (wrk_handle);
-
if (err)
return app_worker_connect_notify (app_wrk, s, err, opaque);
s = session_alloc_for_connection (tc);
- s->session_state = SESSION_STATE_CONNECTING;
+ session_set_state (s, SESSION_STATE_CONNECTING);
s->app_wrk_index = app_wrk->wrk_index;
new_si = s->session_index;
new_ti = s->thread_index;
}
s = session_get (new_si, new_ti);
- s->session_state = SESSION_STATE_READY;
+ session_set_state (s, SESSION_STATE_READY);
session_lookup_add_connection (tc, session_handle (s));
if (app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque))
return 0;
}
+typedef union session_switch_pool_reply_args_
+{
+ struct
+ {
+ u32 session_index;
+ u16 thread_index;
+ u8 is_closed;
+ };
+ u64 as_u64;
+} session_switch_pool_reply_args_t;
+
+STATIC_ASSERT (sizeof (session_switch_pool_reply_args_t) <= sizeof (uword),
+ "switch pool reply args size");
+
static void
session_switch_pool_reply (void *arg)
{
- u32 session_index = pointer_to_uword (arg);
+ session_switch_pool_reply_args_t rargs;
session_t *s;
- s = session_get_if_valid (session_index, vlib_get_thread_index ());
+ rargs.as_u64 = pointer_to_uword (arg);
+ s = session_get_if_valid (rargs.session_index, rargs.thread_index);
if (!s)
return;
+ /* Session closed during migration. Clean everything up */
+ if (rargs.is_closed)
+ {
+ transport_cleanup (session_get_transport_proto (s), s->connection_index,
+ s->thread_index);
+ segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
+ session_free (s);
+ return;
+ }
+
/* Notify app that it has data on the new session */
session_enqueue_notify (s);
}
session_switch_pool (void *cb_args)
{
session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
+ session_switch_pool_reply_args_t rargs;
session_handle_t new_sh;
segment_manager_t *sm;
app_worker_t *app_wrk;
session_t *s;
- void *rargs;
ASSERT (args->thread_index == vlib_get_thread_index ());
s = session_get (args->session_index, args->thread_index);
+ /* Check if session closed during migration */
+ rargs.is_closed = s->session_state >= SESSION_STATE_TRANSPORT_CLOSING;
+
transport_cleanup (session_get_transport_proto (s), s->connection_index,
s->thread_index);
- new_sh = session_make_handle (args->new_session_index,
- args->new_thread_index);
-
app_wrk = app_worker_get_if_valid (s->app_wrk_index);
if (app_wrk)
{
segment_manager_detach_fifo (sm, &s->tx_fifo);
/* Notify app, using old session, about the migration event */
- app_worker_migrate_notify (app_wrk, s, new_sh);
+ if (!rargs.is_closed)
+ {
+ new_sh = session_make_handle (args->new_session_index,
+ args->new_thread_index);
+ app_worker_migrate_notify (app_wrk, s, new_sh);
+ }
}
/* Trigger app read and fifo updates on the new thread */
- rargs = uword_to_pointer (args->new_session_index, void *);
+ rargs.session_index = args->new_session_index;
+ rargs.thread_index = args->new_thread_index;
session_send_rpc_evt_to_thread (args->new_thread_index,
- session_switch_pool_reply, rargs);
+ session_switch_pool_reply,
+ uword_to_pointer (rargs.as_u64, void *));
session_free (s);
clib_mem_free (cb_args);
*/
new_s = session_clone_safe (tc->s_index, old_thread_index);
new_s->connection_index = tc->c_index;
- new_s->session_state = SESSION_STATE_READY;
+ session_set_state (new_s, SESSION_STATE_READY);
new_s->flags |= SESSION_F_IS_MIGRATING;
if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
s = session_get (tc->s_index, tc->thread_index);
if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
return;
- s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
+
+ /* Wait for reply from app before sending notification as the
+ * accept might be rejected */
+ if (s->session_state == SESSION_STATE_ACCEPTING)
+ {
+ session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING);
+ return;
+ }
+
+ session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING);
app_wrk = app_worker_get (s->app_wrk_index);
app_worker_close_notify (app_wrk, s);
}
* 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_DELETED;
+ session_set_state (s, SESSION_STATE_TRANSPORT_DELETED);
session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
svm_fifo_dequeue_drop_all (s->tx_fifo);
break;
* session is just removed because both transport and app have
* confirmed the close*/
session_lookup_del_session (s);
- s->session_state = SESSION_STATE_TRANSPORT_DELETED;
+ session_set_state (s, SESSION_STATE_TRANSPORT_DELETED);
session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
svm_fifo_dequeue_drop_all (s->tx_fifo);
session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
return;
/* Transport thinks that app requested close but it actually didn't.
- * Can happen for tcp if fin and rst are received in close succession. */
+ * Can happen for tcp:
+ * 1)if fin and rst are received in close succession.
+ * 2)if app shutdown the connection. */
if (s->session_state == SESSION_STATE_READY)
{
session_transport_closing_notify (tc);
svm_fifo_dequeue_drop_all (s->tx_fifo);
- s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
+ session_set_state (s, SESSION_STATE_TRANSPORT_CLOSED);
}
/* If app close has not been received or has not yet resulted in
* a transport close, only mark the session transport as closed */
else if (s->session_state <= SESSION_STATE_CLOSING)
- {
- s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
- }
+ session_set_state (s, SESSION_STATE_TRANSPORT_CLOSED);
/* If app also closed, switch to closed */
else if (s->session_state == SESSION_STATE_APP_CLOSED)
- s->session_state = SESSION_STATE_CLOSED;
+ session_set_state (s, SESSION_STATE_CLOSED);
app_wrk = app_worker_get_if_valid (s->app_wrk_index);
if (app_wrk)
svm_fifo_dequeue_drop_all (s->tx_fifo);
if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
return;
- s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
+ if (s->session_state == SESSION_STATE_ACCEPTING)
+ {
+ session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING);
+ return;
+ }
+ session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING);
app_wrk = app_worker_get (s->app_wrk_index);
app_worker_reset_notify (app_wrk, s);
}
app_wrk = app_worker_get_if_valid (s->app_wrk_index);
if (!app_wrk)
return -1;
- s->session_state = SESSION_STATE_ACCEPTING;
+ if (s->session_state != SESSION_STATE_CREATED)
+ return 0;
+ session_set_state (s, SESSION_STATE_ACCEPTING);
if (app_worker_accept_notify (app_wrk, s))
{
/* On transport delete, no notifications should be sent. Unless, the
* accept is retried and successful. */
- s->session_state = SESSION_STATE_CREATED;
+ session_set_state (s, SESSION_STATE_CREATED);
return -1;
}
return 0;
s = session_alloc_for_connection (tc);
s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
- s->session_state = SESSION_STATE_CREATED;
+ session_set_state (s, SESSION_STATE_CREATED);
if ((rv = app_worker_init_accepted (s)))
{
}
session_lookup_add_connection (tc, session_handle (s));
+ session_set_state (s, SESSION_STATE_ACCEPTING);
app_wrk = app_worker_get (s->app_wrk_index);
if ((rv = app_worker_accept_notify (app_wrk, s)))
return rv;
}
- s->session_state = SESSION_STATE_READY;
-
return 0;
}
int
-session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
+session_open_cl (session_endpoint_cfg_t *rmt, session_handle_t *rsh)
{
transport_connection_t *tc;
transport_endpoint_cfg_t *tep;
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);
+ app_wrk = app_worker_get (rmt->app_wrk_index);
s = session_alloc_for_connection (tc);
s->app_wrk_index = app_wrk->wrk_index;
- s->session_state = SESSION_STATE_OPENED;
+ session_set_state (s, SESSION_STATE_OPENED);
if (app_worker_init_connected (app_wrk, s))
{
session_free (s);
}
sh = session_handle (s);
+ *rsh = sh;
+
session_lookup_add_connection (tc, sh);
- return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque);
+ return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, rmt->opaque);
}
int
-session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
+session_open_vc (session_endpoint_cfg_t *rmt, session_handle_t *rsh)
{
transport_connection_t *tc;
transport_endpoint_cfg_t *tep;
- u64 handle, wrk_handle;
+ app_worker_t *app_wrk;
+ session_t *ho;
int rv;
tep = session_endpoint_to_transport_cfg (rmt);
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
- */
- handle = session_make_handle (tc->c_index, app_wrk_index);
- session_lookup_add_half_open (tc, handle);
+ app_wrk = app_worker_get (rmt->app_wrk_index);
- /* Store the half-open handle in the connection. Transport will use it
- * when cleaning up @ref session_half_open_delete_notify
+ /* If transport offers a vc service, only allocate established
+ * session once the connection has been established.
+ * In the meantime allocate half-open session for tracking purposes
+ * associate half-open connection to it and add session to app-worker
+ * half-open table. These are needed to allocate the established
+ * session on transport notification, and to cleanup the half-open
+ * session if the app detaches before connection establishment.
*/
- tc->s_ho_handle = handle;
+ ho = session_alloc_for_half_open (tc);
+ ho->app_wrk_index = app_wrk->wrk_index;
+ ho->ho_index = app_worker_add_half_open (app_wrk, session_handle (ho));
+ ho->opaque = rmt->opaque;
+ *rsh = session_handle (ho);
- /* Track the half-open connections in case we want to forcefully
- * clean them up @ref session_cleanup_half_open
- */
- wrk_handle = session_make_handle (tc->c_index, opaque);
- app_worker_add_half_open (app_worker_get (app_wrk_index),
- rmt->transport_proto, handle, wrk_handle);
+ if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
+ session_lookup_add_half_open (tc, tc->c_index);
return 0;
}
int
-session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
+session_open_app (session_endpoint_cfg_t *rmt, session_handle_t *rsh)
{
- session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
- transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
-
- sep->app_wrk_index = app_wrk_index;
- sep->opaque = opaque;
+ transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (rmt);
+ /* Not supported for now */
+ *rsh = SESSION_INVALID_HANDLE;
return transport_connect (rmt->transport_proto, tep_cfg);
}
-typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
+typedef int (*session_open_service_fn) (session_endpoint_cfg_t *,
+ session_handle_t *);
/* *INDENT-OFF* */
static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
* on open completion.
*/
int
-session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
+session_open (session_endpoint_cfg_t *rmt, session_handle_t *rsh)
{
transport_service_type_t tst;
tst = transport_protocol_service_type (rmt->transport_proto);
- return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
+ return session_open_srv_fns[tst](rmt, rsh);
}
/**
int
session_listen (session_t * ls, session_endpoint_cfg_t * sep)
{
- transport_endpoint_t *tep;
+ transport_endpoint_cfg_t *tep;
int tc_index;
u32 s_index;
/* Transport bind/listen */
- tep = session_endpoint_to_transport (sep);
+ tep = session_endpoint_to_transport_cfg (sep);
s_index = ls->session_index;
tc_index = transport_start_listen (session_get_transport_proto (ls),
s_index, tep);
* worker because local tables (for ct sessions) are not backed by a fib */
ls = listen_session_get (s_index);
ls->connection_index = tc_index;
+ ls->opaque = sep->opaque;
return 0;
}
return 0;
}
+/**
+ * Initialize session half-closing procedure.
+ *
+ * Note that half-closing will not change the state of the session.
+ */
+void
+session_half_close (session_t *s)
+{
+ if (!s)
+ return;
+
+ session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_HALF_CLOSE);
+}
+
/**
* Initialize session closing procedure.
*
return;
}
- s->session_state = SESSION_STATE_CLOSING;
+ /* App closed so stop propagating dequeue notifications */
+ svm_fifo_clear_deq_ntf (s->tx_fifo);
+ session_set_state (s, SESSION_STATE_CLOSING);
session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
}
return;
/* Drop all outstanding tx data */
svm_fifo_dequeue_drop_all (s->tx_fifo);
- s->session_state = SESSION_STATE_CLOSING;
+ session_set_state (s, SESSION_STATE_CLOSING);
session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
}
+/**
+ * Notify transport the session can be half-disconnected.
+ *
+ * Must be called from the session's thread.
+ */
+void
+session_transport_half_close (session_t *s)
+{
+ /* Only READY session can be half-closed */
+ if (s->session_state != SESSION_STATE_READY)
+ {
+ return;
+ }
+
+ transport_half_close (session_get_transport_proto (s), s->connection_index,
+ s->thread_index);
+}
+
/**
* Notify transport the session can be disconnected. This should eventually
* result in a delete notification that allows us to cleanup session state.
if (s->session_state >= SESSION_STATE_APP_CLOSED)
{
if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
- s->session_state = SESSION_STATE_CLOSED;
+ session_set_state (s, SESSION_STATE_CLOSED);
/* If transport is already deleted, just free the session */
else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
session_free_w_fifos (s);
* delete notify. This will finally lead to the complete cleanup of the
* session.
*/
- s->session_state = SESSION_STATE_APP_CLOSED;
+ session_set_state (s, SESSION_STATE_APP_CLOSED);
transport_close (session_get_transport_proto (s), s->connection_index,
s->thread_index);
if (s->session_state >= SESSION_STATE_APP_CLOSED)
{
if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
- s->session_state = SESSION_STATE_CLOSED;
+ session_set_state (s, SESSION_STATE_CLOSED);
else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
session_free_w_fifos (s);
return;
}
- s->session_state = SESSION_STATE_APP_CLOSED;
+ session_set_state (s, SESSION_STATE_APP_CLOSED);
transport_reset (session_get_transport_proto (s), s->connection_index,
s->thread_index);
}
}
/**
- * Allocate event queues in the shared-memory segment
+ * Allocate worker mqs in share-able segment
*
- * That can only be a newly created memfd segment, that must be
- * mapped by all apps/stack users.
+ * That can only be a newly created memfd segment, that must be mapped
+ * by all apps/stack users unless private rx mqs are enabled.
*/
void
-session_vpp_event_queues_allocate (session_main_t * smm)
+session_vpp_wrk_mqs_alloc (session_main_t *smm)
{
- u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
- fifo_segment_t *eqs = &smm->evt_qs_segment;
- uword eqs_size = 64 << 20;
- pid_t vpp_pid = getpid ();
+ u32 mq_q_length = 2048, evt_size = sizeof (session_event_t);
+ fifo_segment_t *mqs_seg = &smm->wrk_mqs_segment;
+ svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
+ uword mqs_seg_size;
int i;
- if (smm->configured_event_queue_length)
- evt_q_length = smm->configured_event_queue_length;
+ mq_q_length = clib_max (mq_q_length, smm->configured_wrk_mq_length);
+
+ svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
+ { mq_q_length, evt_size, 0 }, { mq_q_length >> 1, 256, 0 }
+ };
+ cfg->consumer_pid = 0;
+ cfg->n_rings = 2;
+ cfg->q_nitems = mq_q_length;
+ cfg->ring_cfgs = rc;
- if (smm->evt_qs_segment_size)
- eqs_size = smm->evt_qs_segment_size;
+ /*
+ * Compute mqs segment size based on rings config and leave space
+ * for passing extended configuration messages, i.e., data allocated
+ * outside of the rings. If provided with a config value, accept it
+ * if larger than minimum size.
+ */
+ mqs_seg_size = svm_msg_q_size_to_alloc (cfg) * vec_len (smm->wrk);
+ mqs_seg_size = mqs_seg_size + (1 << 20);
+ mqs_seg_size = clib_max (mqs_seg_size, smm->wrk_mqs_segment_size);
- eqs->ssvm.ssvm_size = eqs_size;
- eqs->ssvm.my_pid = vpp_pid;
- eqs->ssvm.name = format (0, "%s%c", "session: evt-qs-segment", 0);
- /* clib_mem_vm_map_shared consumes first page before requested_va */
- eqs->ssvm.requested_va = smm->session_baseva + clib_mem_get_page_size ();
+ mqs_seg->ssvm.ssvm_size = mqs_seg_size;
+ mqs_seg->ssvm.my_pid = getpid ();
+ mqs_seg->ssvm.name = format (0, "%s%c", "session: wrk-mqs-segment", 0);
- if (ssvm_server_init (&eqs->ssvm, SSVM_SEGMENT_MEMFD))
+ if (ssvm_server_init (&mqs_seg->ssvm, SSVM_SEGMENT_MEMFD))
{
clib_warning ("failed to initialize queue segment");
return;
}
- fifo_segment_init (eqs);
+ fifo_segment_init (mqs_seg);
/* Special fifo segment that's filled only with mqs */
- eqs->h->n_mqs = vec_len (smm->wrk);
+ mqs_seg->h->n_mqs = vec_len (smm->wrk);
for (i = 0; i < vec_len (smm->wrk); i++)
- {
- 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 = fifo_segment_msg_q_alloc (eqs, i, cfg);
- }
+ smm->wrk[i].vpp_event_queue = fifo_segment_msg_q_alloc (mqs_seg, i, cfg);
}
fifo_segment_t *
-session_main_get_evt_q_segment (void)
+session_main_get_wrk_mqs_segment (void)
{
- return &session_main.evt_qs_segment;
+ return &session_main.wrk_mqs_segment;
}
u64
vec_validate (smm->session_tx_fns, session_type);
if (output_node != ~0)
+ next_index = vlib_node_add_next (vlib_get_main (),
+ session_queue_node.index, output_node);
+
+ smm->session_type_to_next[session_type] = next_index;
+ smm->session_tx_fns[session_type] =
+ session_tx_fns[vft->transport_options.tx_type];
+}
+
+void
+session_register_update_time_fn (session_update_time_fn fn, u8 is_add)
+{
+ session_main_t *smm = &session_main;
+ session_update_time_fn *fi;
+ u32 fi_pos = ~0;
+ u8 found = 0;
+
+ vec_foreach (fi, smm->update_time_fns)
{
- foreach_vlib_main ()
+ if (*fi == fn)
{
- next_index = vlib_node_add_next (
- this_vlib_main, session_queue_node.index, output_node);
+ fi_pos = fi - smm->update_time_fns;
+ found = 1;
+ break;
}
}
- smm->session_type_to_next[session_type] = next_index;
- smm->session_tx_fns[session_type] =
- session_tx_fns[vft->transport_options.tx_type];
+ if (is_add)
+ {
+ if (found)
+ {
+ clib_warning ("update time fn %p already registered", fn);
+ return;
+ }
+ vec_add1 (smm->update_time_fns, fn);
+ }
+ else
+ {
+ vec_del1 (smm->update_time_fns, fi_pos);
+ }
}
transport_proto_t
s->connection_index, tep, is_lcl);
}
+int
+session_transport_attribute (session_t *s, u8 is_get,
+ transport_endpt_attr_t *attr)
+{
+ if (s->session_state < SESSION_STATE_READY)
+ return -1;
+
+ return transport_connection_attribute (session_get_transport_proto (s),
+ s->connection_index, s->thread_index,
+ is_get, attr);
+}
+
transport_connection_t *
listen_session_get_transport (session_t * s)
{
vlib_node_set_interrupt_pending (vm, session_queue_node.index);
}
+static void
+session_stats_collector_fn (vlib_stats_collector_data_t *d)
+{
+ u32 i, n_workers, n_wrk_sessions, n_sessions = 0;
+ session_main_t *smm = &session_main;
+ session_worker_t *wrk;
+ counter_t **counters;
+ counter_t *cb;
+
+ n_workers = vec_len (smm->wrk);
+ vlib_stats_validate (d->entry_index, 0, n_workers - 1);
+ counters = d->entry->data;
+ cb = counters[0];
+
+ for (i = 0; i < vec_len (smm->wrk); i++)
+ {
+ wrk = session_main_get_worker (i);
+ n_wrk_sessions = pool_elts (wrk->sessions);
+ cb[i] = n_wrk_sessions;
+ n_sessions += n_wrk_sessions;
+ }
+
+ vlib_stats_set_gauge (d->private_data, n_sessions);
+}
+
+static void
+session_stats_collector_init (void)
+{
+ vlib_stats_collector_reg_t reg = {};
+
+ reg.entry_index =
+ vlib_stats_add_counter_vector ("/sys/session/sessions_per_worker");
+ reg.private_data = vlib_stats_add_gauge ("/sys/session/sessions_total");
+ reg.collect_fn = session_stats_collector_fn;
+ vlib_stats_register_collector_fn (®);
+ vlib_stats_validate (reg.entry_index, 0, vlib_get_n_threads ());
+}
+
static clib_error_t *
session_manager_main_enable (vlib_main_t * vm)
{
/* Allocate cache line aligned worker contexts */
vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
+ clib_spinlock_init (&session_main.pool_realloc_lock);
for (i = 0; i < num_threads; i++)
{
wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
+ wrk->pending_connects = clib_llist_make_head (wrk->event_elts, evt_list);
+ wrk->evts_pending_main =
+ clib_llist_make_head (wrk->event_elts, evt_list);
wrk->vm = vlib_get_main_by_index (i);
wrk->last_vlib_time = vlib_time_now (vm);
wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
+ wrk->timerfd = -1;
vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
- if (num_threads > 1)
- clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
+ if (!smm->no_adaptive && smm->use_private_rx_mqs)
+ session_wrk_enable_adaptive_mode (wrk);
}
/* Allocate vpp event queues segment and queue */
- session_vpp_event_queues_allocate (smm);
+ session_vpp_wrk_mqs_alloc (smm);
/* Initialize segment manager properties */
segment_manager_main_init ();
session_lookup_init ();
app_namespaces_init ();
transport_init ();
+ session_stats_collector_init ();
smm->is_initialized = 1;
done:
transport_enable_disable (vm, 0 /* is_en */ );
}
+/* in this new callback, cookie hint the index */
+void
+session_dma_completion_cb (vlib_main_t *vm, struct vlib_dma_batch *batch)
+{
+ session_worker_t *wrk;
+ wrk = session_main_get_worker (vm->thread_index);
+ session_dma_transfer *dma_transfer;
+
+ dma_transfer = &wrk->dma_trans[wrk->trans_head];
+ vec_add (wrk->pending_tx_buffers, dma_transfer->pending_tx_buffers,
+ vec_len (dma_transfer->pending_tx_buffers));
+ vec_add (wrk->pending_tx_nexts, dma_transfer->pending_tx_nexts,
+ vec_len (dma_transfer->pending_tx_nexts));
+ vec_reset_length (dma_transfer->pending_tx_buffers);
+ vec_reset_length (dma_transfer->pending_tx_nexts);
+ wrk->trans_head++;
+ if (wrk->trans_head == wrk->trans_size)
+ wrk->trans_head = 0;
+ return;
+}
+
+static void
+session_prepare_dma_args (vlib_dma_config_t *args)
+{
+ args->max_transfers = DMA_TRANS_SIZE;
+ args->max_transfer_size = 65536;
+ args->features = 0;
+ args->sw_fallback = 1;
+ args->barrier_before_last = 1;
+ args->callback_fn = session_dma_completion_cb;
+}
+
+static void
+session_node_enable_dma (u8 is_en, int n_vlibs)
+{
+ vlib_dma_config_t args;
+ session_prepare_dma_args (&args);
+ session_worker_t *wrk;
+ vlib_main_t *vm;
+
+ int config_index = -1;
+
+ if (is_en)
+ {
+ vm = vlib_get_main_by_index (0);
+ config_index = vlib_dma_config_add (vm, &args);
+ }
+ else
+ {
+ vm = vlib_get_main_by_index (0);
+ wrk = session_main_get_worker (0);
+ if (wrk->config_index >= 0)
+ vlib_dma_config_del (vm, wrk->config_index);
+ }
+ int i;
+ for (i = 0; i < n_vlibs; i++)
+ {
+ vm = vlib_get_main_by_index (i);
+ wrk = session_main_get_worker (vm->thread_index);
+ wrk->config_index = config_index;
+ if (is_en)
+ {
+ if (config_index >= 0)
+ wrk->dma_enabled = true;
+ wrk->dma_trans = (session_dma_transfer *) clib_mem_alloc (
+ sizeof (session_dma_transfer) * DMA_TRANS_SIZE);
+ bzero (wrk->dma_trans,
+ sizeof (session_dma_transfer) * DMA_TRANS_SIZE);
+ }
+ else
+ {
+ if (wrk->dma_trans)
+ clib_mem_free (wrk->dma_trans);
+ }
+ wrk->trans_head = 0;
+ wrk->trans_tail = 0;
+ wrk->trans_size = DMA_TRANS_SIZE;
+ }
+}
+
void
session_node_enable_disable (u8 is_en)
{
vlib_node_set_state (vm, session_queue_node.index, mstate);
if (is_en)
{
+ session_main_get_worker (0)->state = SESSION_WRK_INTERRUPT;
vlib_node_set_state (vm, session_queue_process_node.index,
state);
n = vlib_get_node (vm, session_queue_process_node.index);
if (sm->use_private_rx_mqs)
application_enable_rx_mqs_nodes (is_en);
+
+ if (sm->dma_enabled)
+ session_node_enable_dma (is_en, n_vlibs);
}
clib_error_t *
smm->session_enable_asap = 0;
smm->poll_main = 0;
smm->use_private_rx_mqs = 0;
- 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->last_transport_proto_type = TRANSPORT_PROTO_DTLS;
+ smm->no_adaptive = 0;
+ smm->last_transport_proto_type = TRANSPORT_PROTO_HTTP;
return 0;
}
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
- if (unformat (input, "event-queue-length %d", &nitems))
+ if (unformat (input, "wrk-mq-length %d", &nitems))
{
if (nitems >= 2048)
- smm->configured_event_queue_length = nitems;
+ smm->configured_wrk_mq_length = nitems;
else
clib_warning ("event queue length %d too small, ignored", nitems);
}
+ else if (unformat (input, "wrk-mqs-segment-size %U",
+ unformat_memory_size, &smm->wrk_mqs_segment_size))
+ ;
else if (unformat (input, "preallocated-sessions %d",
&smm->preallocated_sessions))
;
else if (unformat (input, "local-endpoints-table-buckets %d",
&smm->local_endpoints_table_buckets))
;
- /* Deprecated but maintained for compatibility */
- else if (unformat (input, "evt_qs_memfd_seg"))
- ;
- else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
- &smm->evt_qs_segment_size))
- ;
else if (unformat (input, "enable"))
smm->session_enable_asap = 1;
- else if (unformat (input, "segment-baseva 0x%lx", &smm->session_baseva))
- ;
else if (unformat (input, "use-app-socket-api"))
- appns_sapi_enable ();
+ (void) appns_sapi_enable_disable (1 /* is_enable */);
else if (unformat (input, "poll-main"))
smm->poll_main = 1;
else if (unformat (input, "use-private-rx-mqs"))
smm->use_private_rx_mqs = 1;
+ else if (unformat (input, "no-adaptive"))
+ smm->no_adaptive = 1;
+ else if (unformat (input, "use-dma"))
+ smm->dma_enabled = 1;
+ /*
+ * Deprecated but maintained for compatibility
+ */
+ else if (unformat (input, "evt_qs_memfd_seg"))
+ ;
+ else if (unformat (input, "segment-baseva 0x%lx", &tmp))
+ ;
+ else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
+ &smm->wrk_mqs_segment_size))
+ ;
+ else if (unformat (input, "event-queue-length %d", &nitems))
+ {
+ if (nitems >= 2048)
+ smm->configured_wrk_mq_length = nitems;
+ else
+ clib_warning ("event queue length %d too small, ignored", nitems);
+ }
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);