#include <vnet/dpo/load_balance.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/session/application.h>
+#include <vnet/tcp/tcp.h>
+#include <vnet/session/session_debug.h>
/**
* Per-type vector of transport protocol virtual function tables
* Session lookup key; (src-ip, dst-ip, src-port, dst-port, session-type)
* Value: (owner thread index << 32 | session_index);
*/
-static void
-stream_session_table_add_for_tc (u8 sst, transport_connection_t * tc,
- u64 value)
+void
+stream_session_table_add_for_tc (transport_connection_t * tc, u64 value)
{
session_manager_main_t *smm = &session_manager_main;
session_kv4_t kv4;
session_kv6_t kv6;
- switch (sst)
+ switch (tc->proto)
{
case SESSION_TYPE_IP4_UDP:
case SESSION_TYPE_IP4_TCP:
tc = tp_vfts[s->session_type].get_connection (s->connection_index,
s->thread_index);
- stream_session_table_add_for_tc (s->session_type, tc, value);
+ stream_session_table_add_for_tc (tc, value);
}
static void
-stream_session_half_open_table_add (u8 sst, transport_connection_t * tc,
- u64 value)
+stream_session_half_open_table_add (session_type_t sst,
+ transport_connection_t * tc, u64 value)
{
session_manager_main_t *smm = &session_manager_main;
session_kv4_t kv4;
}
}
-static int
-stream_session_table_del_for_tc (session_manager_main_t * smm, u8 sst,
- transport_connection_t * tc)
+int
+stream_session_table_del_for_tc (transport_connection_t * tc)
{
+ session_manager_main_t *smm = &session_manager_main;
session_kv4_t kv4;
session_kv6_t kv6;
-
- switch (sst)
+ switch (tc->proto)
{
case SESSION_TYPE_IP4_UDP:
case SESSION_TYPE_IP4_TCP:
ts = tp_vfts[s->session_type].get_connection (s->connection_index,
s->thread_index);
- return stream_session_table_del_for_tc (smm, s->session_type, ts);
+ return stream_session_table_del_for_tc (ts);
}
static void
}
transport_connection_t *
-stream_session_lookup_transport4 (session_manager_main_t * smm,
- ip4_address_t * lcl, ip4_address_t * rmt,
+stream_session_lookup_transport4 (ip4_address_t * lcl, ip4_address_t * rmt,
u16 lcl_port, u16 rmt_port, u8 proto,
u32 my_thread_index)
{
+ session_manager_main_t *smm = &session_manager_main;
session_kv4_t kv4;
stream_session_t *s;
int rv;
}
transport_connection_t *
-stream_session_lookup_transport6 (session_manager_main_t * smm,
- ip6_address_t * lcl, ip6_address_t * rmt,
+stream_session_lookup_transport6 (ip6_address_t * lcl, ip6_address_t * rmt,
u16 lcl_port, u16 rmt_port, u8 proto,
u32 my_thread_index)
{
+ session_manager_main_t *smm = &session_manager_main;
stream_session_t *s;
session_kv6_t kv6;
int rv;
/* Finally, try half-open connections */
rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6);
if (rv == 0)
- return tp_vfts[s->session_type].get_half_open (kv6.value & 0xFFFFFFFF);
-
- return 0;
-}
-
-/**
- * Allocate vpp event queue (once) per worker thread
- */
-void
-vpp_session_event_queue_allocate (session_manager_main_t * smm,
- u32 thread_index)
-{
- api_main_t *am = &api_main;
- void *oldheap;
-
- 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);
-
- smm->vpp_event_queues[thread_index] =
- unix_shared_memory_queue_init (2048 /* nels $$$$ config */ ,
- sizeof (session_fifo_event_t),
- 0 /* consumer pid */ ,
- 0
- /* (do not) send signal when queue non-empty */
- );
-
- svm_pop_heap (oldheap);
- }
-}
-
-void
-session_manager_get_segment_info (u32 index, u8 ** name, u32 * size)
-{
- svm_fifo_segment_private_t *s;
- s = svm_fifo_get_segment (index);
- *name = s->h->segment_name;
- *size = s->ssvm.ssvm_size;
-}
-
-always_inline int
-session_manager_add_segment_i (session_manager_main_t * smm,
- session_manager_t * sm,
- u32 segment_size, u8 * segment_name)
-{
- svm_fifo_segment_create_args_t _ca, *ca = &_ca;
- int rv;
-
- memset (ca, 0, sizeof (*ca));
-
- ca->segment_name = (char *) segment_name;
- ca->segment_size = segment_size;
-
- rv = svm_fifo_segment_create (ca);
- if (rv)
- {
- clib_warning ("svm_fifo_segment_create ('%s', %d) failed",
- ca->segment_name, ca->segment_size);
- vec_free (segment_name);
- return -1;
- }
-
- vec_add1 (sm->segment_indices, ca->new_segment_index);
+ return tp_vfts[proto].get_half_open (kv6.value & 0xFFFFFFFF);
return 0;
}
-static int
-session_manager_add_segment (session_manager_main_t * smm,
- session_manager_t * sm)
-{
- u8 *segment_name;
- svm_fifo_segment_create_args_t _ca, *ca = &_ca;
- u32 add_segment_size;
- u32 default_segment_size = 128 << 10;
-
- memset (ca, 0, sizeof (*ca));
- segment_name = format (0, "%d-%d%c", getpid (),
- smm->unique_segment_name_counter++, 0);
- add_segment_size =
- sm->add_segment_size ? sm->add_segment_size : default_segment_size;
-
- return session_manager_add_segment_i (smm, sm, add_segment_size,
- segment_name);
-}
-
-int
-session_manager_add_first_segment (session_manager_main_t * smm,
- session_manager_t * sm, u32 segment_size,
- u8 ** segment_name)
-{
- svm_fifo_segment_create_args_t _ca, *ca = &_ca;
- memset (ca, 0, sizeof (*ca));
- *segment_name = format (0, "%d-%d%c", getpid (),
- smm->unique_segment_name_counter++, 0);
- return session_manager_add_segment_i (smm, sm, segment_size, *segment_name);
-}
-
-void
-session_manager_del (session_manager_main_t * smm, session_manager_t * sm)
-{
- u32 *deleted_sessions = 0;
- u32 *deleted_thread_indices = 0;
- int i, j;
-
- /* Across all fifo segments used by the server */
- for (j = 0; j < vec_len (sm->segment_indices); j++)
- {
- svm_fifo_segment_private_t *fifo_segment;
- svm_fifo_t **fifos;
- /* Vector of fifos allocated in the segment */
- fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]);
- fifos = (svm_fifo_t **) fifo_segment->h->fifos;
-
- /*
- * Remove any residual sessions from the session lookup table
- * Don't bother deleting the individual fifos, we're going to
- * throw away the fifo segment in a minute.
- */
- for (i = 0; i < vec_len (fifos); i++)
- {
- svm_fifo_t *fifo;
- u32 session_index, thread_index;
- stream_session_t *session;
-
- fifo = fifos[i];
- session_index = fifo->server_session_index;
- thread_index = fifo->server_thread_index;
-
- session = pool_elt_at_index (smm->sessions[thread_index],
- session_index);
-
- /* Add to the deleted_sessions vector (once!) */
- if (!session->is_deleted)
- {
- session->is_deleted = 1;
- vec_add1 (deleted_sessions,
- session - smm->sessions[thread_index]);
- vec_add1 (deleted_thread_indices, thread_index);
- }
- }
-
- for (i = 0; i < vec_len (deleted_sessions); i++)
- {
- stream_session_t *session;
-
- session =
- pool_elt_at_index (smm->sessions[deleted_thread_indices[i]],
- deleted_sessions[i]);
-
- /* Instead of directly removing the session call disconnect */
- stream_session_disconnect (session);
-
- /*
- stream_session_table_del (smm, session);
- pool_put(smm->sessions[deleted_thread_indices[i]], session);
- */
- }
-
- vec_reset_length (deleted_sessions);
- vec_reset_length (deleted_thread_indices);
-
- /* Instead of removing the segment, test when removing the session if
- * the segment can be removed
- */
- /* svm_fifo_segment_delete (fifo_segment); */
- }
-
- vec_free (deleted_sessions);
- vec_free (deleted_thread_indices);
-}
-
int
-session_manager_allocate_session_fifos (session_manager_main_t * smm,
- session_manager_t * sm,
- svm_fifo_t ** server_rx_fifo,
- svm_fifo_t ** server_tx_fifo,
- u32 * fifo_segment_index,
- u8 * added_a_segment)
-{
- svm_fifo_segment_private_t *fifo_segment;
- u32 fifo_size, default_fifo_size = 8192 /* TODO config */ ;
- int i;
-
- *added_a_segment = 0;
-
- /* Allocate svm fifos */
- ASSERT (vec_len (sm->segment_indices));
-
-again:
- for (i = 0; i < vec_len (sm->segment_indices); i++)
- {
- *fifo_segment_index = sm->segment_indices[i];
- fifo_segment = svm_fifo_get_segment (*fifo_segment_index);
-
- fifo_size = sm->rx_fifo_size;
- fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size;
- *server_rx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size);
-
- fifo_size = sm->tx_fifo_size;
- fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size;
- *server_tx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size);
-
- if (*server_rx_fifo == 0)
- {
- /* This would be very odd, but handle it... */
- if (*server_tx_fifo != 0)
- {
- svm_fifo_segment_free_fifo (fifo_segment, *server_tx_fifo);
- *server_tx_fifo = 0;
- }
- continue;
- }
- if (*server_tx_fifo == 0)
- {
- if (*server_rx_fifo != 0)
- {
- svm_fifo_segment_free_fifo (fifo_segment, *server_rx_fifo);
- *server_rx_fifo = 0;
- }
- continue;
- }
- break;
- }
-
- /* See if we're supposed to create another segment */
- if (*server_rx_fifo == 0)
- {
- if (sm->add_segment)
- {
- if (*added_a_segment)
- {
- clib_warning ("added a segment, still cant allocate a fifo");
- return SESSION_ERROR_NEW_SEG_NO_SPACE;
- }
-
- if (session_manager_add_segment (smm, sm))
- return VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
-
- *added_a_segment = 1;
- goto again;
- }
- else
- return SESSION_ERROR_NO_SPACE;
- }
- return 0;
-}
-
-int
-stream_session_create_i (session_manager_main_t * smm, application_t * app,
- transport_connection_t * tc,
+stream_session_create_i (segment_manager_t * sm, transport_connection_t * tc,
stream_session_t ** ret_s)
{
- int rv;
+ session_manager_main_t *smm = &session_manager_main;
svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
u32 fifo_segment_index;
- u32 pool_index, seg_size;
+ u32 pool_index;
stream_session_t *s;
u64 value;
u32 thread_index = tc->thread_index;
- session_manager_t *sm;
- u8 segment_added;
- u8 *seg_name;
-
- sm = session_manager_get (app->session_manager_index);
-
- /* Check the API queue */
- if (app->mode == APP_SERVER && application_api_queue_is_full (app))
- return SESSION_ERROR_API_QUEUE_FULL;
+ int rv;
- if ((rv = session_manager_allocate_session_fifos (smm, sm, &server_rx_fifo,
- &server_tx_fifo,
- &fifo_segment_index,
- &segment_added)))
+ if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo,
+ &server_tx_fifo,
+ &fifo_segment_index)))
return rv;
- if (segment_added && app->mode == APP_SERVER)
- {
- /* Send an API message to the external server, to map new segment */
- ASSERT (app->cb_fns.add_segment_callback);
-
- session_manager_get_segment_info (fifo_segment_index, &seg_name,
- &seg_size);
- if (app->cb_fns.add_segment_callback (app->api_client_index, seg_name,
- seg_size))
- return VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
- }
-
/* Create the session */
- pool_get (smm->sessions[thread_index], s);
+ pool_get_aligned (smm->sessions[thread_index], s, CLIB_CACHE_LINE_BYTES);
memset (s, 0, sizeof (*s));
/* Initialize backpointers */
pool_index = s - smm->sessions[thread_index];
- server_rx_fifo->server_session_index = pool_index;
- server_rx_fifo->server_thread_index = thread_index;
+ server_rx_fifo->master_session_index = pool_index;
+ server_rx_fifo->master_thread_index = thread_index;
- server_tx_fifo->server_session_index = pool_index;
- server_tx_fifo->server_thread_index = thread_index;
+ server_tx_fifo->master_session_index = pool_index;
+ server_tx_fifo->master_thread_index = thread_index;
s->server_rx_fifo = server_rx_fifo;
s->server_tx_fifo = server_tx_fifo;
/* Initialize state machine, such as it is... */
- s->session_type = app->session_type;
+ s->session_type = tc->proto;
s->session_state = SESSION_STATE_CONNECTING;
- s->app_index = application_get_index (app);
- s->server_segment_index = fifo_segment_index;
+ s->svm_segment_index = fifo_segment_index;
s->thread_index = thread_index;
s->session_index = pool_index;
/* Add to the main lookup table */
value = (((u64) thread_index) << 32) | (u64) s->session_index;
- stream_session_table_add_for_tc (app->session_type, tc, value);
+ stream_session_table_add_for_tc (tc, value);
*ret_s = s;
return 0;
}
+/** Enqueue buffer chain tail */
+always_inline int
+session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b,
+ u32 offset, u8 is_in_order)
+{
+ vlib_buffer_t *chain_b;
+ u32 chain_bi = b->next_buffer;
+ vlib_main_t *vm = vlib_get_main ();
+ u8 *data, len;
+ u16 written = 0;
+ int rv = 0;
+
+ do
+ {
+ chain_b = vlib_get_buffer (vm, chain_bi);
+ data = vlib_buffer_get_current (chain_b);
+ len = chain_b->current_length;
+ if (is_in_order)
+ {
+ rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data);
+ if (rv < len)
+ {
+ return (rv > 0) ? (written + rv) : written;
+ }
+ written += rv;
+ }
+ else
+ {
+ rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len,
+ data);
+ if (rv)
+ return -1;
+ offset += len;
+ }
+ }
+ while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ ? chain_b->next_buffer : 0));
+
+ if (is_in_order)
+ return written;
+
+ return 0;
+}
+
/*
* Enqueue data for delivery to session peer. Does not notify peer of enqueue
* event but on request can queue notification events for later delivery by
* calling stream_server_flush_enqueue_events().
*
* @param tc Transport connection which is to be enqueued data
- * @param data Data to be enqueued
- * @param len Length of data to be enqueued
+ * @param b Buffer to be enqueued
+ * @param offset Offset at which to start enqueueing if out-of-order
* @param queue_event Flag to indicate if peer is to be notified or if event
* is to be queued. The former is useful when more data is
* enqueued and only one event is to be generated.
+ * @param is_in_order Flag to indicate if data is in order
* @return Number of bytes enqueued or a negative value if enqueueing failed.
*/
int
-stream_session_enqueue_data (transport_connection_t * tc, u8 * data, u16 len,
- u8 queue_event)
+stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b,
+ u32 offset, u8 queue_event, u8 is_in_order)
{
stream_session_t *s;
- int enqueued;
+ int enqueued = 0, rv;
s = stream_session_get (tc->s_index, tc->thread_index);
- /* Make sure there's enough space left. We might've filled the pipes */
- if (PREDICT_FALSE (len > svm_fifo_max_enqueue (s->server_rx_fifo)))
- return -1;
-
- enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, s->pid, len, data);
+ if (is_in_order)
+ {
+ 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))
+ {
+ rv = session_enqueue_chain_tail (s, b, 0, 1);
+ if (rv <= 0)
+ return enqueued;
+ enqueued += rv;
+ }
+ }
+ else
+ {
+ rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset,
+ b->current_length,
+ vlib_buffer_get_current (b));
+ if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
+ rv = session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
+ if (rv)
+ return -1;
+ }
if (queue_event)
{
}
}
- return enqueued;
+ if (is_in_order)
+ return enqueued;
+
+ return 0;
}
/** Check if we have space in rx fifo to push more bytes */
u32 offset, u32 max_bytes)
{
stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
- return svm_fifo_peek (s->server_tx_fifo, s->pid, offset, max_bytes, buffer);
+ return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer);
}
u32
stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
{
stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
- return svm_fifo_dequeue_drop (s->server_tx_fifo, s->pid, max_bytes);
+ return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes);
}
/**
/* Get session's server */
app = application_get (s->app_index);
- /* Fabricate event */
- evt.fifo = s->server_rx_fifo;
- evt.event_type = FIFO_EVENT_SERVER_RX;
- evt.event_id = serial_number++;
- evt.enqueue_length = svm_fifo_max_dequeue (s->server_rx_fifo);
-
- /* Add event to server's event queue */
- q = app->event_queue;
-
- /* 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
- return -1;
+ /* 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);
- if (1)
+ /* If no event, send one */
+ if (svm_fifo_set_event (s->server_rx_fifo))
{
- ELOG_TYPE_DECLARE (e) =
- {
- .format = "evt-enqueue: id %d length %d",.format_args = "i4i4",};
- struct
- {
- u32 data[2];
- } *ed;
- ed = ELOG_DATA (&vlib_global_main.elog_main, e);
- ed->data[0] = evt.event_id;
- ed->data[1] = evt.enqueue_length;
+ /* Fabricate event */
+ evt.fifo = s->server_rx_fifo;
+ evt.event_type = FIFO_EVENT_APP_RX;
+ evt.event_id = serial_number++;
+
+ /* Add event to server's event queue */
+ q = app->event_queue;
+
+ /* 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;
+ }
}
+ /* *INDENT-OFF* */
+ SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({
+ ed->data[0] = evt.event_id;
+ ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo);
+ }));
+ /* *INDENT-ON* */
+
return 0;
}
return errors;
}
-/*
- * Start listening on server's ip/port pair for requested transport.
+/**
+ * Init fifo tail and head pointers
*
- * Creates a 'dummy' stream session with state LISTENING to be used in session
- * lookups, prior to establishing connection. Requests transport to build
- * it's own specific listening connection.
+ * Useful if transport uses absolute offsets for tracking ooo segments.
*/
-int
-stream_session_start_listen (u32 server_index, ip46_address_t * ip, u16 port)
-{
- session_manager_main_t *smm = &session_manager_main;
- stream_session_t *s;
- transport_connection_t *tc;
- application_t *srv;
- u32 tci;
-
- srv = application_get (server_index);
-
- pool_get (smm->listen_sessions[srv->session_type], s);
- memset (s, 0, sizeof (*s));
-
- s->session_type = srv->session_type;
- s->session_state = SESSION_STATE_LISTENING;
- s->session_index = s - smm->listen_sessions[srv->session_type];
- s->app_index = srv->index;
-
- /* Transport bind/listen */
- tci = tp_vfts[srv->session_type].bind (smm->vlib_main, s->session_index, ip,
- port);
-
- /* Attach transport to session */
- s->connection_index = tci;
- tc = tp_vfts[srv->session_type].get_listener (tci);
-
- srv->session_index = s->session_index;
-
- /* Add to the main lookup table */
- stream_session_table_add_for_tc (s->session_type, tc, s->session_index);
-
- return 0;
-}
-
void
-stream_session_stop_listen (u32 server_index)
+stream_session_init_fifos_pointers (transport_connection_t * tc,
+ u32 rx_pointer, u32 tx_pointer)
{
- session_manager_main_t *smm = &session_manager_main;
- stream_session_t *listener;
- transport_connection_t *tc;
- application_t *srv;
-
- srv = application_get (server_index);
- listener = pool_elt_at_index (smm->listen_sessions[srv->session_type],
- srv->session_index);
-
- tc = tp_vfts[srv->session_type].get_listener (listener->connection_index);
- stream_session_table_del_for_tc (smm, listener->session_type, tc);
-
- tp_vfts[srv->session_type].unbind (smm->vlib_main,
- listener->connection_index);
- pool_put (smm->listen_sessions[srv->session_type], listener);
-}
-
-int
-connect_server_add_segment_cb (application_t * ss, char *segment_name,
- u32 segment_size)
-{
- /* Does exactly nothing, but die */
- ASSERT (0);
- return 0;
-}
-
-void
-connects_session_manager_init (session_manager_main_t * smm, u8 session_type)
-{
- session_manager_t *sm;
- u32 connect_fifo_size = 8 << 10; /* Config? */
- u32 default_segment_size = 1 << 20;
-
- pool_get (smm->session_managers, sm);
- memset (sm, 0, sizeof (*sm));
-
- sm->add_segment_size = default_segment_size;
- sm->rx_fifo_size = connect_fifo_size;
- sm->tx_fifo_size = connect_fifo_size;
- sm->add_segment = 1;
-
- session_manager_add_segment (smm, sm);
- smm->connect_manager_index[session_type] = sm - smm->session_managers;
+ stream_session_t *s;
+ s = stream_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);
}
void
session_manager_main_t *smm = &session_manager_main;
application_t *app;
stream_session_t *new_s = 0;
- u64 value;
+ u64 handle;
+ u32 api_context = 0;
- value = stream_session_half_open_lookup (smm, &tc->lcl_ip, &tc->rmt_ip,
- tc->lcl_port, tc->rmt_port,
- tc->proto);
- if (value == HALF_OPEN_LOOKUP_INVALID_VALUE)
+ handle = stream_session_half_open_lookup (smm, &tc->lcl_ip, &tc->rmt_ip,
+ tc->lcl_port, tc->rmt_port,
+ tc->proto);
+ if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
{
clib_warning ("This can't be good!");
return;
}
- app = application_get (value >> 32);
+ /* Get the app's index from the handle we stored when opening connection */
+ app = application_get (handle >> 32);
+ api_context = tc->s_index;
if (!is_fail)
{
- /* Create new session (server segments are allocated if needed) */
- if (stream_session_create_i (smm, app, tc, &new_s))
- return;
+ segment_manager_t *sm;
+ sm = application_get_connect_segment_manager (app);
- app->session_index = stream_session_get_index (new_s);
- app->thread_index = new_s->thread_index;
+ /* Create new session (svm segments are allocated if needed) */
+ if (stream_session_create_i (sm, tc, &new_s))
+ return;
- /* Allocate vpp event queue for this thread if needed */
- vpp_session_event_queue_allocate (smm, tc->thread_index);
+ new_s->app_index = app->index;
}
/* Notify client */
- app->cb_fns.session_connected_callback (app->api_client_index, new_s,
+ app->cb_fns.session_connected_callback (app->index, api_context, new_s,
is_fail);
/* Cleanup session lookup */
stream_session_delete (stream_session_t * s)
{
session_manager_main_t *smm = vnet_get_session_manager_main ();
- svm_fifo_segment_private_t *fifo_segment;
- application_t *app;
- int rv;
-
- /* delete from the main lookup table */
- rv = stream_session_table_del (smm, s);
- if (rv)
- clib_warning ("hash delete error, rv %d", rv);
+ /* Delete from the main lookup table. */
+ stream_session_table_del (smm, s);
/* Cleanup fifo segments */
- fifo_segment = svm_fifo_get_segment (s->server_segment_index);
- svm_fifo_segment_free_fifo (fifo_segment, s->server_rx_fifo);
- svm_fifo_segment_free_fifo (fifo_segment, s->server_tx_fifo);
-
- /* Cleanup app if client */
- app = application_get (s->app_index);
- if (app->mode == APP_CLIENT)
- {
- application_del (app);
- }
- else if (app->mode == APP_SERVER)
- {
- session_manager_t *sm;
- svm_fifo_segment_private_t *fifo_segment;
- svm_fifo_t **fifos;
- u32 fifo_index;
-
- sm = session_manager_get (app->session_manager_index);
-
- /* Delete fifo */
- fifo_segment = svm_fifo_get_segment (s->server_segment_index);
- fifos = (svm_fifo_t **) fifo_segment->h->fifos;
-
- fifo_index = svm_fifo_segment_index (fifo_segment);
-
- /* Remove segment only if it holds no fifos and not the first */
- if (sm->segment_indices[0] != fifo_index && vec_len (fifos) == 0)
- svm_fifo_segment_delete (fifo_segment);
- }
+ segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
+ s->server_tx_fifo);
pool_put (smm->sessions[s->thread_index], s);
}
{
stream_session_t *s;
+ /* App might've been removed already */
s = stream_session_get_if_valid (tc->s_index, tc->thread_index);
if (!s)
{
- clib_warning ("Surprised!");
return;
}
stream_session_delete (s);
stream_session_accept (transport_connection_t * tc, u32 listener_index,
u8 sst, u8 notify)
{
- session_manager_main_t *smm = &session_manager_main;
application_t *server;
stream_session_t *s, *listener;
+ segment_manager_t *sm;
int rv;
/* Find the server */
- listener = pool_elt_at_index (smm->listen_sessions[sst], listener_index);
+ listener = listen_session_get (sst, listener_index);
server = application_get (listener->app_index);
- if ((rv = stream_session_create_i (smm, server, tc, &s)))
+ sm = application_get_listen_segment_manager (server, listener);
+ if ((rv = stream_session_create_i (sm, tc, &s)))
return rv;
- /* Allocate vpp event queue for this thread if needed */
- vpp_session_event_queue_allocate (smm, tc->thread_index);
+ s->app_index = server->index;
+ s->listener_index = listener_index;
/* Shoulder-tap the server */
if (notify)
return 0;
}
-void
-stream_session_open (u8 sst, ip46_address_t * addr, u16 port_host_byte_order,
- u32 app_index)
+/**
+ * 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 res Resulting transport connection .
+ */
+int
+stream_session_open (u32 app_index, session_type_t st,
+ transport_endpoint_t * tep,
+ transport_connection_t ** res)
{
transport_connection_t *tc;
- u32 tci;
- u64 value;
+ int rv;
+ u64 handle;
- /* Ask transport to open connection */
- tci = tp_vfts[sst].open (addr, port_host_byte_order);
+ rv = tp_vfts[st].open (&tep->ip, tep->port);
+ if (rv < 0)
+ {
+ clib_warning ("Transport failed to open connection.");
+ return VNET_API_ERROR_SESSION_CONNECT_FAIL;
+ }
- /* Get transport connection */
- tc = tp_vfts[sst].get_half_open (tci);
+ tc = tp_vfts[st].get_half_open ((u32) rv);
- /* Store api_client_index and transport connection index */
- value = (((u64) app_index) << 32) | (u64) tc->c_index;
+ /* 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;
/* Add to the half-open lookup table */
- stream_session_half_open_table_add (sst, tc, value);
+ stream_session_half_open_table_add (st, tc, handle);
+
+ *res = tc;
+
+ return 0;
+}
+
+/**
+ * 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, transport_endpoint_t * tep)
+{
+ transport_connection_t *tc;
+ u32 tci;
+
+ /* Transport bind/listen */
+ tci = tp_vfts[s->session_type].bind (s->session_index, &tep->ip, tep->port);
+
+ if (tci == (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;
+
+ /* Add to the main lookup table */
+ stream_session_table_add_for_tc (tc, s->session_index);
+
+ return 0;
+}
+
+/**
+ * Ask transport to stop listening on local transport endpoint.
+ *
+ * @param s Session to stop listening on. It must be in state LISTENING.
+ */
+int
+stream_session_stop_listen (stream_session_t * s)
+{
+ transport_connection_t *tc;
+
+ if (s->session_state != SESSION_STATE_LISTENING)
+ {
+ clib_warning ("not a listening session");
+ return -1;
+ }
+
+ tc = tp_vfts[s->session_type].get_listener (s->connection_index);
+ if (!tc)
+ {
+ clib_warning ("no transport");
+ return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
+ }
+
+ stream_session_table_del_for_tc (tc);
+ tp_vfts[s->session_type].unbind (s->connection_index);
+ return 0;
+}
+
+void
+session_send_session_evt_to_thread (u64 session_handle,
+ fifo_event_type_t evt_type,
+ u32 thread_index)
+{
+ static u16 serial_number = 0;
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+
+ /* Fabricate event */
+ evt.session_handle = session_handle;
+ evt.event_type = evt_type;
+ evt.event_id = serial_number++;
+
+ q = session_manager_get_vpp_event_queue (thread_index);
+
+ /* Based on request block (or not) for lack of space */
+ if (PREDICT_TRUE (q->cursize < q->maxsize))
+ unix_shared_memory_queue_add (q, (u8 *) & evt,
+ 0 /* do wait for mutex */ );
+ else
+ {
+ clib_warning ("queue full");
+ return;
+ }
}
/**
* Disconnect session and propagate to transport. 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.
*/
void
stream_session_disconnect (stream_session_t * s)
{
- tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
s->session_state = SESSION_STATE_CLOSED;
+ tp_vfts[s->session_type].close (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.
*/
void
stream_session_cleanup (stream_session_t * s)
{
+ session_manager_main_t *smm = &session_manager_main;
+ int rv;
+
+ s->session_state = SESSION_STATE_CLOSED;
+
+ /* Delete from the main lookup table to avoid more enqueues */
+ rv = stream_session_table_del (smm, s);
+ if (rv)
+ clib_warning ("hash delete error, rv %d", rv);
+
tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
- stream_session_delete (s);
}
void
tp_vfts[type] = *vft;
/* If an offset function is provided, then peek instead of dequeue */
- smm->session_rx_fns[type] =
- (vft->rx_fifo_offset) ? session_fifo_rx_peek : session_fifo_rx_dequeue;
+ smm->session_tx_fns[type] =
+ (vft->tx_fifo_offset) ? session_tx_fifo_peek_and_snd :
+ session_tx_fifo_dequeue_and_snd;
}
transport_proto_vft_t *
return &tp_vfts[type];
}
+/**
+ * Allocate vpp event queue (once) per worker thread
+ */
+void
+session_vpp_event_queue_allocate (session_manager_main_t * smm,
+ u32 thread_index)
+{
+ api_main_t *am = &api_main;
+ void *oldheap;
+ u32 event_queue_length = 2048;
+
+ 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)
+ event_queue_length = smm->configured_event_queue_length;
+
+ 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 */ );
+
+ svm_pop_heap (oldheap);
+ }
+}
+
static clib_error_t *
-session_manager_main_init (vlib_main_t * vm)
+session_manager_main_enable (vlib_main_t * vm)
{
- u32 num_threads;
- vlib_thread_main_t *vtm = vlib_get_thread_main ();
session_manager_main_t *smm = &session_manager_main;
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ u32 num_threads;
int i;
- smm->vlib_main = vm;
- smm->vnet_main = vnet_get_main ();
-
num_threads = 1 /* main thread */ + vtm->n_threads;
if (num_threads < 1)
vec_validate (smm->sessions, num_threads - 1);
vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1);
vec_validate (smm->tx_buffers, num_threads - 1);
- vec_validate (smm->fifo_events, num_threads - 1);
- vec_validate (smm->evts_partially_read, num_threads - 1);
+ vec_validate (smm->pending_event_vector, num_threads - 1);
+ vec_validate (smm->free_event_vector, num_threads - 1);
vec_validate (smm->current_enqueue_epoch, num_threads - 1);
vec_validate (smm->vpp_event_queues, num_threads - 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;
+ }
+
+#if SESSION_DBG
+ 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);
+
/* $$$$ preallocate hack config parameter */
for (i = 0; i < 200000; i++)
{
stream_session_t *ss;
- pool_get (smm->sessions[0], ss);
+ pool_get_aligned (smm->sessions[0], ss, CLIB_CACHE_LINE_BYTES);
memset (ss, 0, sizeof (*ss));
}
200000 /* $$$$ config parameter nbuckets */ ,
(64 << 20) /*$$$ config parameter table size */ );
- for (i = 0; i < SESSION_N_TYPES; i++)
- smm->connect_manager_index[i] = INVALID_INDEX;
+ smm->is_enabled = 1;
+
+ /* Enable TCP transport */
+ vnet_tcp_enable_disable (vm, 1);
+
+ return 0;
+}
+
+void
+session_node_enable_disable (u8 is_en)
+{
+ u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
+ /* *INDENT-OFF* */
+ foreach_vlib_main (({
+ vlib_node_set_state (this_vlib_main, session_queue_node.index,
+ state);
+ }));
+ /* *INDENT-ON* */
+}
+
+clib_error_t *
+vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
+{
+ if (is_en)
+ {
+ if (session_manager_main.is_enabled)
+ return 0;
+
+ session_node_enable_disable (is_en);
+ return session_manager_main_enable (vm);
+ }
+ else
+ {
+ session_manager_main.is_enabled = 0;
+ session_node_enable_disable (is_en);
+ }
+
+ return 0;
+}
+
+clib_error_t *
+session_manager_main_init (vlib_main_t * vm)
+{
+ session_manager_main_t *smm = &session_manager_main;
+
+ smm->vlib_main = vm;
+ smm->vnet_main = vnet_get_main ();
+ smm->is_enabled = 0;
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (session_manager_main_init)
+ static clib_error_t *session_config_fn (vlib_main_t * vm,
+ unformat_input_t * input)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ u32 nitems;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "event-queue-length %d", &nitems))
+ {
+ if (nitems >= 2048)
+ smm->configured_event_queue_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);
+ }
return 0;
}
-VLIB_INIT_FUNCTION (session_manager_main_init);
+VLIB_CONFIG_FUNCTION (session_config_fn, "session");
/*
* fd.io coding-style-patch-verification: ON