* limitations under the License.
*/
+#include <math.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
-#include <vnet/pg/pg.h>
-#include <vnet/ip/ip.h>
-
#include <vnet/tcp/tcp.h>
-
-#include <vppinfra/hash.h>
-#include <vppinfra/error.h>
#include <vppinfra/elog.h>
+#include <vnet/session/application.h>
+#include <vnet/session/session_debug.h>
#include <vlibmemory/unix_shared_memory_queue.h>
-#include <vnet/udp/udp_packet.h>
-#include <vnet/lisp-cp/packets.h>
-#include <math.h>
-
vlib_node_registration_t session_queue_node;
typedef struct
vlib_node_registration_t session_queue_node;
-#define foreach_session_queue_error \
-_(TX, "Packets transmitted") \
+#define foreach_session_queue_error \
+_(TX, "Packets transmitted") \
_(TIMER, "Timer events")
typedef enum
};
always_inline int
-session_fifo_rx_i (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm, session_fifo_event_t * e0,
- stream_session_t * s0, u32 thread_index, int *n_tx_packets,
- u8 peek_data)
+session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm,
+ session_fifo_event_t * e0,
+ stream_session_t * s0, u32 thread_index,
+ int *n_tx_packets, u8 peek_data)
{
u32 n_trace = vlib_get_trace_count (vm, node);
u32 left_to_snd0, max_len_to_snd0, len_to_deq0, n_bufs, snd_space0;
transport_proto_vft_t *transport_vft;
u32 next_index, next0, *to_next, n_left_to_next, bi0;
vlib_buffer_t *b0;
- u32 rx_offset;
+ u32 rx_offset = 0, max_dequeue0;
u16 snd_mss0;
u8 *data0;
- int i;
+ int i, n_bytes_read;
next_index = next0 = session_type_to_next[s0->session_type];
snd_space0 = transport_vft->send_space (tc0);
snd_mss0 = transport_vft->send_mss (tc0);
- if (snd_space0 == 0 || svm_fifo_max_dequeue (s0->server_tx_fifo) == 0
- || snd_mss0 == 0)
- return 0;
-
- ASSERT (e0->enqueue_length > 0);
-
- /* Ensure we're not writing more than transport window allows */
- max_len_to_snd0 = clib_min (e0->enqueue_length, snd_space0);
+ /* Can't make any progress */
+ if (snd_space0 == 0 || snd_mss0 == 0)
+ {
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ return 0;
+ }
if (peek_data)
{
/* Offset in rx fifo from where to peek data */
- rx_offset = transport_vft->rx_fifo_offset (tc0);
+ rx_offset = transport_vft->tx_fifo_offset (tc0);
}
- /* TODO check if transport is willing to send len_to_snd0
- * bytes (Nagle) */
+ /* Check how much we can pull. If buffering, subtract the offset */
+ max_dequeue0 = svm_fifo_max_dequeue (s0->server_tx_fifo) - rx_offset;
+
+ /* Allow enqueuing of a new event */
+ svm_fifo_unset_event (s0->server_tx_fifo);
+
+ /* Nothing to read return */
+ if (max_dequeue0 == 0)
+ return 0;
+
+ /* Ensure we're not writing more than transport window allows */
+ if (max_dequeue0 < snd_space0)
+ {
+ /* Constrained by tx queue. Try to send only fully formed segments */
+ max_len_to_snd0 = (max_dequeue0 > snd_mss0) ?
+ max_dequeue0 - max_dequeue0 % snd_mss0 : max_dequeue0;
+ /* TODO Nagle ? */
+ }
+ else
+ {
+ max_len_to_snd0 = snd_space0;
+ }
n_frame_bytes = snd_mss0 * VLIB_FRAME_SIZE;
n_frames_per_evt = ceil ((double) max_len_to_snd0 / n_frame_bytes);
* XXX 0.9 because when debugging we might not get a full frame */
if (PREDICT_FALSE (n_bufs < 0.9 * VLIB_FRAME_SIZE))
{
- /* Keep track of how much we've dequeued and exit */
- e0->enqueue_length -= max_len_to_snd0 - left_to_snd0;
+ if (svm_fifo_set_event (s0->server_tx_fifo))
+ {
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ }
return -1;
}
t0->server_thread_index = s0->thread_index;
}
- if (1)
- {
- ELOG_TYPE_DECLARE (e) =
- {
- .format = "evt-dequeue: id %d length %d",.format_args =
- "i4i4",};
- struct
- {
- u32 data[2];
- } *ed;
- ed = ELOG_DATA (&vm->elog_main, e);
- ed->data[0] = e0->event_id;
- ed->data[1] = e0->enqueue_length;
- }
-
len_to_deq0 = (left_to_snd0 < snd_mss0) ? left_to_snd0 : snd_mss0;
+ /* *INDENT-OFF* */
+ SESSION_EVT_DBG(SESSION_EVT_DEQ, s0, ({
+ ed->data[0] = e0->event_id;
+ ed->data[1] = max_dequeue0;
+ ed->data[2] = len_to_deq0;
+ ed->data[3] = left_to_snd0;
+ }));
+ /* *INDENT-ON* */
+
/* Make room for headers */
data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN);
* 2) buffer chains */
if (peek_data)
{
- int n_bytes_read;
n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, s0->pid,
rx_offset, len_to_deq0, data0);
- if (n_bytes_read < 0)
+ if (n_bytes_read <= 0)
goto dequeue_fail;
/* Keep track of progress locally, transport is also supposed to
- * increment it independently when pushing header */
+ * increment it independently when pushing the header */
rx_offset += n_bytes_read;
}
else
{
- if (svm_fifo_dequeue_nowait (s0->server_tx_fifo, s0->pid,
- len_to_deq0, data0) < 0)
+ n_bytes_read = svm_fifo_dequeue_nowait (s0->server_tx_fifo,
+ s0->pid, len_to_deq0,
+ data0);
+ if (n_bytes_read <= 0)
goto dequeue_fail;
}
- b0->current_length = len_to_deq0;
+ b0->current_length = n_bytes_read;
/* Ask transport to push header */
transport_vft->push_header (tc0, b0);
- left_to_snd0 -= len_to_deq0;
+ left_to_snd0 -= n_bytes_read;
*n_tx_packets = *n_tx_packets + 1;
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- /* If we couldn't dequeue all bytes store progress */
- if (max_len_to_snd0 < e0->enqueue_length)
+ /* If we couldn't dequeue all bytes mark as partially read */
+ if (max_len_to_snd0 < max_dequeue0)
{
- e0->enqueue_length -= max_len_to_snd0;
- vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ /* If we don't already have new event */
+ if (svm_fifo_set_event (s0->server_tx_fifo))
+ {
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ }
}
return 0;
dequeue_fail:
- /* Can't read from fifo. Store event rx progress, save as partially read,
- * return buff to free list and return */
- e0->enqueue_length -= max_len_to_snd0 - left_to_snd0;
- vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ /*
+ * Can't read from fifo. If we don't already have an event, save as partially
+ * read, return buff to free list and return
+ */
+ clib_warning ("dequeue fail");
- to_next -= 1;
- n_left_to_next += 1;
+ if (svm_fifo_set_event (s0->server_tx_fifo))
+ {
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
_vec_len (smm->tx_buffers[thread_index]) += 1;
- clib_warning ("dequeue fail");
return 0;
}
int
-session_fifo_rx_peek (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm, session_fifo_event_t * e0,
- stream_session_t * s0, u32 thread_index, int *n_tx_pkts)
+session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm,
+ session_fifo_event_t * e0,
+ stream_session_t * s0, u32 thread_index,
+ int *n_tx_pkts)
{
- return session_fifo_rx_i (vm, node, smm, e0, s0, thread_index, n_tx_pkts,
- 1);
+ return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
+ n_tx_pkts, 1);
}
int
-session_fifo_rx_dequeue (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm,
- session_fifo_event_t * e0, stream_session_t * s0,
- u32 thread_index, int *n_tx_pkts)
+session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm,
+ session_fifo_event_t * e0,
+ stream_session_t * s0, u32 thread_index,
+ int *n_tx_pkts)
{
- return session_fifo_rx_i (vm, node, smm, e0, s0, thread_index, n_tx_pkts,
- 0);
+ return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
+ n_tx_pkts, 0);
}
static uword
{
session_manager_main_t *smm = vnet_get_session_manager_main ();
session_fifo_event_t *my_fifo_events, *e;
- u32 n_to_dequeue;
+ u32 n_to_dequeue, n_events;
unix_shared_memory_queue_t *q;
+ application_t *app;
int n_tx_packets = 0;
- u32 my_thread_index = vm->cpu_index;
+ u32 my_thread_index = vm->thread_index;
int i, rv;
+ f64 now = vlib_time_now (vm);
+
+ SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, my_thread_index);
/*
* Update TCP time
*/
- tcp_update_time (vlib_time_now (vm), my_thread_index);
+ tcp_update_time (now, my_thread_index);
/*
* Get vpp queue events
/* min number of events we can dequeue without blocking */
n_to_dequeue = q->cursize;
- if (n_to_dequeue == 0)
+ my_fifo_events = smm->fifo_events[my_thread_index];
+
+ if (n_to_dequeue == 0 && vec_len (my_fifo_events) == 0)
return 0;
- my_fifo_events = smm->fifo_events[my_thread_index];
+ SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
- /* If we didn't manage to process previous events try going
+ /*
+ * If we didn't manage to process previous events try going
* over them again without dequeuing new ones.
- * XXX: Block senders to sessions that can't keep up */
+ */
+ /* XXX: Block senders to sessions that can't keep up */
if (vec_len (my_fifo_events) >= 100)
- goto skip_dequeue;
+ {
+ clib_warning ("too many fifo events unsolved");
+ goto skip_dequeue;
+ }
/* See you in the next life, don't be late */
if (pthread_mutex_trylock (&q->mutex))
smm->fifo_events[my_thread_index] = my_fifo_events;
skip_dequeue:
-
- for (i = 0; i < n_to_dequeue; i++)
+ n_events = vec_len (my_fifo_events);
+ for (i = 0; i < n_events; i++)
{
svm_fifo_t *f0; /* $$$ prefetch 1 ahead maybe */
stream_session_t *s0;
- u32 server_session_index0, server_thread_index0;
+ u32 session_index0;
session_fifo_event_t *e0;
e0 = &my_fifo_events[i];
f0 = e0->fifo;
- server_session_index0 = f0->server_session_index;
- server_thread_index0 = f0->server_thread_index;
+ session_index0 = f0->server_session_index;
/* $$$ add multiple event queues, per vpp worker thread */
- ASSERT (server_thread_index0 == my_thread_index);
+ ASSERT (f0->server_thread_index == my_thread_index);
+
+ s0 = stream_session_get_if_valid (session_index0, my_thread_index);
- s0 = pool_elt_at_index (smm->sessions[my_thread_index],
- server_session_index0);
+ if (CLIB_DEBUG && !s0)
+ {
+ clib_warning ("It's dead, Jim!");
+ continue;
+ }
+
+ if (PREDICT_FALSE (s0->session_state == SESSION_STATE_CLOSED))
+ continue;
ASSERT (s0->thread_index == my_thread_index);
case FIFO_EVENT_SERVER_TX:
/* Spray packets in per session type frames, since they go to
* different nodes */
- rv = (smm->session_rx_fns[s0->session_type]) (vm, node, smm, e0, s0,
+ rv = (smm->session_tx_fns[s0->session_type]) (vm, node, smm, e0, s0,
my_thread_index,
&n_tx_packets);
+ /* Out of buffers */
if (rv < 0)
goto done;
break;
-
+ case FIFO_EVENT_SERVER_EXIT:
+ stream_session_disconnect (s0);
+ break;
+ case FIFO_EVENT_BUILTIN_RX:
+ svm_fifo_unset_event (s0->server_rx_fifo);
+ /* Get session's server */
+ app = application_get (s0->app_index);
+ app->cb_fns.builtin_server_rx_callback (s0);
+ break;
default:
clib_warning ("unhandled event type %d", e0->event_type);
}
done:
/* Couldn't process all events. Probably out of buffers */
- if (PREDICT_FALSE (i < n_to_dequeue))
+ if (PREDICT_FALSE (i < n_events))
{
session_fifo_event_t *partially_read =
smm->evts_partially_read[my_thread_index];
- vec_add (partially_read, &my_fifo_events[i], n_to_dequeue - i);
+ vec_add (partially_read, &my_fifo_events[i], n_events - i);
vec_free (my_fifo_events);
smm->fifo_events[my_thread_index] = partially_read;
smm->evts_partially_read[my_thread_index] = 0;
vlib_node_increment_counter (vm, session_queue_node.index,
SESSION_QUEUE_ERROR_TX, n_tx_packets);
+ SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 1);
+
return n_tx_packets;
}
.n_errors = ARRAY_LEN (session_queue_error_strings),
.error_strings = session_queue_error_strings,
.n_next_nodes = SESSION_QUEUE_N_NEXT,
- /* .state = VLIB_NODE_STATE_DISABLED, enable on-demand? */
- /* edit / add dispositions here */
+ .state = VLIB_NODE_STATE_DISABLED,
.next_nodes =
{
[SESSION_QUEUE_NEXT_DROP] = "error-drop",
Code Review / vpp.git / blobdiff