blob: 2a4bb6b942562ffb31e2fb4a9954af3714816ea9 [file] [log] [blame]
/*
* 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:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <math.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vppinfra/elog.h>
#include <vnet/session/transport.h>
#include <vnet/session/session.h>
#include <vnet/session/application.h>
#include <vnet/session/application_interface.h>
#include <vnet/session/application_local.h>
#include <vnet/session/session_debug.h>
#include <svm/queue.h>
#define app_check_thread_and_barrier(_fn, _arg) \
if (!vlib_thread_is_main_w_barrier ()) \
{ \
vlib_rpc_call_main_thread (_fn, (u8 *) _arg, sizeof(*_arg)); \
return; \
}
static void
session_mq_listen_handler (void *data)
{
session_listen_msg_t *mp = (session_listen_msg_t *) data;
vnet_listen_args_t _a, *a = &_a;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (session_mq_listen_handler, mp);
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->sep.is_ip4 = mp->is_ip4;
clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
a->sep.port = mp->port;
a->sep.fib_index = mp->vrf;
a->sep.sw_if_index = ENDPOINT_INVALID_INDEX;
a->sep.transport_proto = mp->proto;
a->sep_ext.ckpair_index = mp->ckpair_index;
a->sep_ext.crypto_engine = mp->crypto_engine;
a->app_index = app->app_index;
a->wrk_map_index = mp->wrk_index;
if ((rv = vnet_listen (a)))
clib_warning ("listen returned: %d", rv);
app_wrk = application_get_worker (app, mp->wrk_index);
mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
return;
}
static void
session_mq_listen_uri_handler (void *data)
{
session_listen_uri_msg_t *mp = (session_listen_uri_msg_t *) data;
vnet_listen_args_t _a, *a = &_a;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (session_mq_listen_uri_handler, mp);
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->uri = (char *) mp->uri;
a->app_index = app->app_index;
rv = vnet_bind_uri (a);
app_wrk = application_get_worker (app, 0);
mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
}
static void
session_mq_connect_handler (void *data)
{
session_connect_msg_t *mp = (session_connect_msg_t *) data;
vnet_connect_args_t _a, *a = &_a;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (session_mq_connect_handler, mp);
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->sep.is_ip4 = mp->is_ip4;
clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
a->sep.port = mp->port;
a->sep.transport_proto = mp->proto;
a->sep.peer.fib_index = mp->vrf;
clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
a->sep_ext.parent_handle = mp->parent_handle;
a->sep_ext.ckpair_index = mp->ckpair_index;
a->sep_ext.crypto_engine = mp->crypto_engine;
a->sep_ext.flags = mp->flags;
if (mp->hostname_len)
{
vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
}
a->api_context = mp->context;
a->app_index = app->app_index;
a->wrk_map_index = mp->wrk_index;
if ((rv = vnet_connect (a)))
{
clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
app_wrk = application_get_worker (app, mp->wrk_index);
mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
/* is_fail */ 1);
}
vec_free (a->sep_ext.hostname);
}
static void
session_mq_connect_uri_handler (void *data)
{
session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
vnet_connect_args_t _a, *a = &_a;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->uri = (char *) mp->uri;
a->api_context = mp->context;
a->app_index = app->app_index;
if ((rv = vnet_connect_uri (a)))
{
clib_warning ("connect_uri returned: %d", rv);
app_wrk = application_get_worker (app, 0 /* default wrk only */ );
mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
/* is_fail */ 1);
}
}
static void
session_mq_disconnect_handler (void *data)
{
session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
vnet_disconnect_args_t _a, *a = &_a;
application_t *app;
app = application_lookup (mp->client_index);
if (!app)
return;
a->app_index = app->app_index;
a->handle = mp->handle;
vnet_disconnect_session (a);
}
static void
app_mq_detach_handler (void *data)
{
session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
vnet_app_detach_args_t _a, *a = &_a;
application_t *app;
app_check_thread_and_barrier (app_mq_detach_handler, mp);
app = application_lookup (mp->client_index);
if (!app)
return;
a->app_index = app->app_index;
a->api_client_index = mp->client_index;
vnet_application_detach (a);
}
static void
session_mq_unlisten_handler (void *data)
{
session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
vnet_unlisten_args_t _a, *a = &_a;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->app_index = app->app_index;
a->handle = mp->handle;
a->wrk_map_index = mp->wrk_index;
if ((rv = vnet_unlisten (a)))
clib_warning ("unlisten returned: %d", rv);
app_wrk = application_get_worker (app, a->wrk_map_index);
if (!app_wrk)
return;
mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
}
static void
session_mq_accepted_reply_handler (void *data)
{
session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
vnet_disconnect_args_t _a = { 0 }, *a = &_a;
session_state_t old_state;
app_worker_t *app_wrk;
session_t *s;
/* Server isn't interested, kill the session */
if (mp->retval)
{
a->app_index = mp->context;
a->handle = mp->handle;
vnet_disconnect_session (a);
return;
}
/* Mail this back from the main thread. We're not polling in main
* thread so we're using other workers for notifications. */
if (vlib_num_workers () && vlib_get_thread_index () != 0
&& session_thread_from_handle (mp->handle) == 0)
{
vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
(u8 *) mp, sizeof (*mp));
return;
}
s = session_get_from_handle_if_valid (mp->handle);
if (!s)
return;
app_wrk = app_worker_get (s->app_wrk_index);
if (app_wrk->app_index != mp->context)
{
clib_warning ("app doesn't own session");
return;
}
if (!session_has_transport (s))
{
s->session_state = SESSION_STATE_READY;
if (ct_session_connect_notify (s))
return;
}
else
{
old_state = s->session_state;
s->session_state = SESSION_STATE_READY;
if (!svm_fifo_is_empty_prod (s->rx_fifo))
app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
/* Closed while waiting for app to reply. Resend disconnect */
if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
{
app_worker_close_notify (app_wrk, s);
s->session_state = old_state;
return;
}
}
}
static void
session_mq_reset_reply_handler (void *data)
{
vnet_disconnect_args_t _a = { 0 }, *a = &_a;
session_reset_reply_msg_t *mp;
app_worker_t *app_wrk;
session_t *s;
application_t *app;
u32 index, thread_index;
mp = (session_reset_reply_msg_t *) data;
app = application_lookup (mp->context);
if (!app)
return;
session_parse_handle (mp->handle, &index, &thread_index);
s = session_get_if_valid (index, thread_index);
/* No session or not the right session */
if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
return;
app_wrk = app_worker_get (s->app_wrk_index);
if (!app_wrk || app_wrk->app_index != app->app_index)
{
clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
mp->handle);
return;
}
/* Client objected to resetting the session, log and continue */
if (mp->retval)
{
clib_warning ("client retval %d", mp->retval);
return;
}
/* This comes as a response to a reset, transport only waiting for
* confirmation to remove connection state, no need to disconnect */
a->handle = mp->handle;
a->app_index = app->app_index;
vnet_disconnect_session (a);
}
static void
session_mq_disconnected_handler (void *data)
{
session_disconnected_reply_msg_t *rmp;
vnet_disconnect_args_t _a, *a = &_a;
svm_msg_q_msg_t _msg, *msg = &_msg;
session_disconnected_msg_t *mp;
app_worker_t *app_wrk;
session_event_t *evt;
session_t *s;
application_t *app;
int rv = 0;
mp = (session_disconnected_msg_t *) data;
if (!(s = session_get_from_handle_if_valid (mp->handle)))
{
clib_warning ("could not disconnect handle %llu", mp->handle);
return;
}
app_wrk = app_worker_get (s->app_wrk_index);
app = application_lookup (mp->client_index);
if (!(app_wrk && app && app->app_index == app_wrk->app_index))
{
clib_warning ("could not disconnect session: %llu app: %u",
mp->handle, mp->client_index);
return;
}
a->handle = mp->handle;
a->app_index = app_wrk->wrk_index;
rv = vnet_disconnect_session (a);
svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
SESSION_MQ_CTRL_EVT_RING,
SVM_Q_WAIT, msg);
evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
clib_memset (evt, 0, sizeof (*evt));
evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
rmp = (session_disconnected_reply_msg_t *) evt->data;
rmp->handle = mp->handle;
rmp->context = mp->context;
rmp->retval = rv;
svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
}
static void
session_mq_disconnected_reply_handler (void *data)
{
session_disconnected_reply_msg_t *mp;
vnet_disconnect_args_t _a, *a = &_a;
application_t *app;
mp = (session_disconnected_reply_msg_t *) data;
/* Client objected to disconnecting the session, log and continue */
if (mp->retval)
{
clib_warning ("client retval %d", mp->retval);
return;
}
/* Disconnect has been confirmed. Confirm close to transport */
app = application_lookup (mp->context);
if (app)
{
a->handle = mp->handle;
a->app_index = app->app_index;
vnet_disconnect_session (a);
}
}
static void
session_mq_worker_update_handler (void *data)
{
session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
session_worker_update_reply_msg_t *rmp;
svm_msg_q_msg_t _msg, *msg = &_msg;
app_worker_t *app_wrk;
u32 owner_app_wrk_map;
session_event_t *evt;
session_t *s;
application_t *app;
app = application_lookup (mp->client_index);
if (!app)
return;
if (!(s = session_get_from_handle_if_valid (mp->handle)))
{
clib_warning ("invalid handle %llu", mp->handle);
return;
}
app_wrk = app_worker_get (s->app_wrk_index);
if (app_wrk->app_index != app->app_index)
{
clib_warning ("app %u does not own session %llu", app->app_index,
mp->handle);
return;
}
owner_app_wrk_map = app_wrk->wrk_map_index;
app_wrk = application_get_worker (app, mp->wrk_index);
/* This needs to come from the new owner */
if (mp->req_wrk_index == owner_app_wrk_map)
{
session_req_worker_update_msg_t *wump;
svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
SESSION_MQ_CTRL_EVT_RING,
SVM_Q_WAIT, msg);
evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
clib_memset (evt, 0, sizeof (*evt));
evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
wump = (session_req_worker_update_msg_t *) evt->data;
wump->session_handle = mp->handle;
svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
return;
}
app_worker_own_session (app_wrk, s);
/*
* Send reply
*/
svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
SESSION_MQ_CTRL_EVT_RING,
SVM_Q_WAIT, msg);
evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
clib_memset (evt, 0, sizeof (*evt));
evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
rmp = (session_worker_update_reply_msg_t *) evt->data;
rmp->handle = mp->handle;
rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
rmp->segment_handle = session_segment_handle (s);
svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
/*
* Retransmit messages that may have been lost
*/
if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
app_worker_close_notify (app_wrk, s);
}
vlib_node_registration_t session_queue_node;
typedef struct
{
u32 session_index;
u32 server_thread_index;
} session_queue_trace_t;
/* packet trace format function */
static u8 *
format_session_queue_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
s = format (s, "session index %d thread index %d",
t->session_index, t->server_thread_index);
return s;
}
#define foreach_session_queue_error \
_(TX, "Packets transmitted") \
_(TIMER, "Timer events") \
_(NO_BUFFER, "Out of buffers")
typedef enum
{
#define _(sym,str) SESSION_QUEUE_ERROR_##sym,
foreach_session_queue_error
#undef _
SESSION_QUEUE_N_ERROR,
} session_queue_error_t;
static char *session_queue_error_strings[] = {
#define _(sym,string) string,
foreach_session_queue_error
#undef _
};
enum
{
SESSION_TX_NO_BUFFERS = -2,
SESSION_TX_NO_DATA,
SESSION_TX_OK
};
static void
session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
u32 next_index, u32 * to_next, u16 n_segs,
session_t * s, u32 n_trace)
{
session_queue_trace_t *t;
vlib_buffer_t *b;
int i;
for (i = 0; i < clib_min (n_trace, n_segs); i++)
{
b = vlib_get_buffer (vm, to_next[i]);
vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
t = vlib_add_trace (vm, node, b, sizeof (*t));
t->session_index = s->session_index;
t->server_thread_index = s->thread_index;
}
vlib_set_trace_count (vm, node, n_trace - i);
}
always_inline void
session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
{
vlib_buffer_t *chain_b, *prev_b;
u32 chain_bi0, to_deq, left_from_seg;
session_worker_t *wrk;
u16 len_to_deq, n_bytes_read;
u8 *data, j;
wrk = session_main_get_worker (ctx->s->thread_index);
b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
b->total_length_not_including_first_buffer = 0;
chain_b = b;
left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length,
ctx->left_to_snd);
to_deq = left_from_seg;
for (j = 1; j < ctx->n_bufs_per_seg; j++)
{
prev_b = chain_b;
len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
*n_bufs -= 1;
chain_bi0 = wrk->tx_buffers[*n_bufs];
chain_b = vlib_get_buffer (vm, chain_bi0);
chain_b->current_data = 0;
data = vlib_buffer_get_current (chain_b);
if (peek_data)
{
n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
ctx->sp.tx_offset, len_to_deq, data);
ctx->sp.tx_offset += n_bytes_read;
}
else
{
if (ctx->transport_vft->transport_options.tx_type ==
TRANSPORT_TX_DGRAM)
{
svm_fifo_t *f = ctx->s->tx_fifo;
session_dgram_hdr_t *hdr = &ctx->hdr;
u16 deq_now;
deq_now = clib_min (hdr->data_length - hdr->data_offset,
len_to_deq);
n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
data);
ASSERT (n_bytes_read > 0);
hdr->data_offset += n_bytes_read;
if (hdr->data_offset == hdr->data_length)
{
u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
svm_fifo_dequeue_drop (f, offset);
}
}
else
n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
len_to_deq, data);
}
ASSERT (n_bytes_read == len_to_deq);
chain_b->current_length = n_bytes_read;
b->total_length_not_including_first_buffer += chain_b->current_length;
/* update previous buffer */
prev_b->next_buffer = chain_bi0;
prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
/* update current buffer */
chain_b->next_buffer = 0;
to_deq -= n_bytes_read;
if (to_deq == 0)
break;
}
ASSERT (to_deq == 0
&& b->total_length_not_including_first_buffer == left_from_seg);
ctx->left_to_snd -= left_from_seg;
}
always_inline void
session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
{
u32 len_to_deq;
u8 *data0;
int n_bytes_read;
/*
* Start with the first buffer in chain
*/
b->error = 0;
b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
b->current_data = 0;
data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
if (peek_data)
{
n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset,
len_to_deq, data0);
ASSERT (n_bytes_read > 0);
/* Keep track of progress locally, transport is also supposed to
* increment it independently when pushing the header */
ctx->sp.tx_offset += n_bytes_read;
}
else
{
if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
{
session_dgram_hdr_t *hdr = &ctx->hdr;
svm_fifo_t *f = ctx->s->tx_fifo;
u16 deq_now;
u32 offset;
ASSERT (hdr->data_length > hdr->data_offset);
deq_now = clib_min (hdr->data_length - hdr->data_offset,
len_to_deq);
offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
ASSERT (n_bytes_read > 0);
if (ctx->s->session_state == SESSION_STATE_LISTENING)
{
ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
ctx->tc->rmt_port = hdr->rmt_port;
}
hdr->data_offset += n_bytes_read;
if (hdr->data_offset == hdr->data_length)
{
offset = hdr->data_length + SESSION_CONN_HDR_LEN;
svm_fifo_dequeue_drop (f, offset);
}
}
else
{
n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
len_to_deq, data0);
ASSERT (n_bytes_read > 0);
}
}
b->current_length = n_bytes_read;
ctx->left_to_snd -= n_bytes_read;
/*
* Fill in the remaining buffers in the chain, if any
*/
if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
}
always_inline u8
session_tx_not_ready (session_t * s, u8 peek_data)
{
if (peek_data)
{
if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
return 0;
/* Can retransmit for closed sessions but can't send new data if
* session is not ready or closed */
else if (s->session_state < SESSION_STATE_READY)
return 1;
else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
{
/* Allow closed transports to still send custom packets.
* For instance, tcp may want to send acks in time-wait. */
if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
&& (s->flags & SESSION_F_CUSTOM_TX))
return 0;
return 2;
}
}
return 0;
}
always_inline transport_connection_t *
session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
{
if (peek_data)
{
return ctx->transport_vft->get_connection (ctx->s->connection_index,
ctx->s->thread_index);
}
else
{
if (ctx->s->session_state == SESSION_STATE_LISTENING)
return ctx->transport_vft->get_listener (ctx->s->connection_index);
else
{
return ctx->transport_vft->get_connection (ctx->s->connection_index,
ctx->s->thread_index);
}
}
}
always_inline void
session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
u32 max_segs, u8 peek_data)
{
u32 n_bytes_per_buf, n_bytes_per_seg;
ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
if (peek_data)
{
/* Offset in rx fifo from where to peek data */
if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue))
{
ctx->max_len_to_snd = 0;
return;
}
ctx->max_dequeue -= ctx->sp.tx_offset;
}
else
{
if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
{
if (ctx->max_dequeue <= sizeof (ctx->hdr))
{
ctx->max_len_to_snd = 0;
return;
}
svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
(u8 *) & ctx->hdr);
ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
}
}
ASSERT (ctx->max_dequeue > 0);
/* Ensure we're not writing more than transport window allows */
if (ctx->max_dequeue < ctx->sp.snd_space)
{
/* Constrained by tx queue. Try to send only fully formed segments */
ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ?
(ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) :
ctx->max_dequeue;
/* TODO Nagle ? */
}
else
{
/* Expectation is that snd_space0 is already a multiple of snd_mss */
ctx->max_len_to_snd = ctx->sp.snd_space;
}
/* Check if we're tx constrained by the node */
ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss);
if (ctx->n_segs_per_evt > max_segs)
{
ctx->n_segs_per_evt = max_segs;
ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss;
}
n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf);
ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss,
n_bytes_per_buf -
TRANSPORT_MAX_HDRS_LEN);
}
always_inline void
session_tx_maybe_reschedule (session_worker_t * wrk,
session_tx_context_t * ctx,
session_evt_elt_t * elt)
{
session_t *s = ctx->s;
svm_fifo_unset_event (s->tx_fifo);
if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset)
if (svm_fifo_set_event (s->tx_fifo))
session_evt_add_head_old (wrk, elt);
}
always_inline int
session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
vlib_node_runtime_t * node,
session_evt_elt_t * elt,
int *n_tx_packets, u8 peek_data)
{
u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
session_tx_context_t *ctx = &wrk->ctx;
session_main_t *smm = &session_main;
session_event_t *e = &elt->evt;
vlib_main_t *vm = wrk->vm;
transport_proto_t tp;
vlib_buffer_t *pb;
u16 n_bufs, rv;
if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
{
if (rv < 2)
session_evt_add_old (wrk, elt);
return SESSION_TX_NO_DATA;
}
next_index = smm->session_type_to_next[ctx->s->session_type];
max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
tp = session_get_transport_proto (ctx->s);
ctx->transport_vft = transport_protocol_get_vft (tp);
ctx->tc = session_tx_get_transport (ctx, peek_data);
if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
{
if (ctx->transport_vft->flush_data)
ctx->transport_vft->flush_data (ctx->tc);
e->event_type = SESSION_IO_EVT_TX;
}
if (ctx->s->flags & SESSION_F_CUSTOM_TX)
{
u32 n_custom_tx;
ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
*n_tx_packets += n_custom_tx;
if (PREDICT_FALSE
(ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
return SESSION_TX_OK;
max_burst -= n_custom_tx;
if (!max_burst || (ctx->s->flags & SESSION_F_CUSTOM_TX))
{
session_evt_add_old (wrk, elt);
return SESSION_TX_OK;
}
}
transport_connection_snd_params (ctx->tc, &ctx->sp);
if (!ctx->sp.snd_space)
{
/* If the deschedule flag was set, remove session from scheduler.
* Transport is responsible for rescheduling this session. */
if (ctx->sp.flags & TRANSPORT_SND_F_DESCHED)
transport_connection_deschedule (ctx->tc);
/* Request to postpone the session, e.g., zero-wnd and transport
* is not currently probing */
else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE)
session_evt_add_old (wrk, elt);
/* This flow queue is "empty" so it should be re-evaluated before
* the ones that have data to send. */
else
session_evt_add_head_old (wrk, elt);
return SESSION_TX_NO_DATA;
}
if (transport_connection_is_tx_paced (ctx->tc))
{
u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
if (snd_space < TRANSPORT_PACER_MIN_BURST)
{
session_evt_add_head_old (wrk, elt);
return SESSION_TX_NO_DATA;
}
snd_space = clib_min (ctx->sp.snd_space, snd_space);
ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ?
snd_space - snd_space % ctx->sp.snd_mss : snd_space;
}
/* Check how much we can pull. */
session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
if (PREDICT_FALSE (!ctx->max_len_to_snd))
{
transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
session_tx_maybe_reschedule (wrk, ctx, elt);
return SESSION_TX_NO_DATA;
}
n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
CLIB_CACHE_LINE_BYTES);
n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
if (PREDICT_FALSE (n_bufs < n_bufs_needed))
{
if (n_bufs)
vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
session_evt_add_head_old (wrk, elt);
vlib_node_increment_counter (wrk->vm, node->node_index,
SESSION_QUEUE_ERROR_NO_BUFFER, 1);
return SESSION_TX_NO_BUFFERS;
}
ctx->left_to_snd = ctx->max_len_to_snd;
n_left = ctx->n_segs_per_evt;
while (n_left >= 4)
{
vlib_buffer_t *b0, *b1;
u32 bi0, bi1;
pbi = wrk->tx_buffers[n_bufs - 3];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
pbi = wrk->tx_buffers[n_bufs - 4];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
bi0 = wrk->tx_buffers[--n_bufs];
bi1 = wrk->tx_buffers[--n_bufs];
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
ctx->transport_vft->push_header (ctx->tc, b0);
ctx->transport_vft->push_header (ctx->tc, b1);
n_left -= 2;
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
vec_add1 (wrk->pending_tx_buffers, bi0);
vec_add1 (wrk->pending_tx_buffers, bi1);
vec_add1 (wrk->pending_tx_nexts, next_index);
vec_add1 (wrk->pending_tx_nexts, next_index);
}
while (n_left)
{
vlib_buffer_t *b0;
u32 bi0;
if (n_left > 1)
{
pbi = wrk->tx_buffers[n_bufs - 2];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
}
bi0 = wrk->tx_buffers[--n_bufs];
b0 = vlib_get_buffer (vm, bi0);
session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
/* Ask transport to push header after current_length and
* total_length_not_including_first_buffer are updated */
ctx->transport_vft->push_header (ctx->tc, b0);
n_left -= 1;
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
vec_add1 (wrk->pending_tx_buffers, bi0);
vec_add1 (wrk->pending_tx_nexts, next_index);
}
if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
ctx->n_segs_per_evt, ctx->s, n_trace);
if (PREDICT_FALSE (n_bufs))
vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
*n_tx_packets += ctx->n_segs_per_evt;
transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
ASSERT (ctx->left_to_snd == 0);
/* If we couldn't dequeue all bytes reschedule as old flow. Otherwise,
* check if application enqueued more data and reschedule accordingly */
if (ctx->max_len_to_snd < ctx->max_dequeue)
session_evt_add_old (wrk, elt);
else
session_tx_maybe_reschedule (wrk, ctx, elt);
if (!peek_data
&& ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
{
/* Fix dgram pre header */
if (ctx->max_len_to_snd < ctx->max_dequeue)
svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
sizeof (session_dgram_pre_hdr_t));
/* More data needs to be read */
else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
if (svm_fifo_set_event (ctx->s->tx_fifo))
session_evt_add_old (wrk, elt);
if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
session_dequeue_notify (ctx->s);
}
return SESSION_TX_OK;
}
int
session_tx_fifo_peek_and_snd (session_worker_t * wrk,
vlib_node_runtime_t * node,
session_evt_elt_t * e, int *n_tx_packets)
{
return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
}
int
session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
vlib_node_runtime_t * node,
session_evt_elt_t * e, int *n_tx_packets)
{
return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
}
int
session_tx_fifo_dequeue_internal (session_worker_t * wrk,
vlib_node_runtime_t * node,
session_evt_elt_t * e, int *n_tx_packets)
{
session_t *s = wrk->ctx.s;
if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
return 0;
svm_fifo_unset_event (s->tx_fifo);
return transport_custom_tx (session_get_transport_proto (s), s,
VLIB_FRAME_SIZE - *n_tx_packets);
}
always_inline session_t *
session_event_get_session (session_event_t * e, u8 thread_index)
{
return session_get_if_valid (e->session_index, thread_index);
}
always_inline void
session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
{
clib_llist_index_t ei;
void (*fp) (void *);
session_event_t *e;
session_t *s;
ei = clib_llist_entry_index (wrk->event_elts, elt);
e = &elt->evt;
switch (e->event_type)
{
case SESSION_CTRL_EVT_RPC:
fp = e->rpc_args.fp;
(*fp) (e->rpc_args.arg);
break;
case SESSION_CTRL_EVT_CLOSE:
s = session_get_from_handle_if_valid (e->session_handle);
if (PREDICT_FALSE (!s))
break;
session_transport_close (s);
break;
case SESSION_CTRL_EVT_RESET:
s = session_get_from_handle_if_valid (e->session_handle);
if (PREDICT_FALSE (!s))
break;
session_transport_reset (s);
break;
case SESSION_CTRL_EVT_LISTEN:
session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_LISTEN_URI:
session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_UNLISTEN:
session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_CONNECT:
session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_CONNECT_URI:
session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_DISCONNECT:
session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_DISCONNECTED:
session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_ACCEPTED_REPLY:
session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
elt));
break;
case SESSION_CTRL_EVT_RESET_REPLY:
session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_WORKER_UPDATE:
session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_APP_DETACH:
app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
break;
default:
clib_warning ("unhandled event type %d", e->event_type);
}
/* Regrab elements in case pool moved */
elt = pool_elt_at_index (wrk->event_elts, ei);
if (!clib_llist_elt_is_linked (elt, evt_list))
{
e = &elt->evt;
if (e->event_type >= SESSION_CTRL_EVT_BOUND)
session_evt_ctrl_data_free (wrk, elt);
session_evt_elt_free (wrk, elt);
}
}
always_inline void
session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
session_evt_elt_t * elt, u32 thread_index,
int *n_tx_packets)
{
session_main_t *smm = &session_main;
app_worker_t *app_wrk;
clib_llist_index_t ei;
session_event_t *e;
session_t *s;
ei = clib_llist_entry_index (wrk->event_elts, elt);
e = &elt->evt;
switch (e->event_type)
{
case SESSION_IO_EVT_TX_FLUSH:
case SESSION_IO_EVT_TX:
s = session_event_get_session (e, thread_index);
if (PREDICT_FALSE (!s))
break;
CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
wrk->ctx.s = s;
/* Spray packets in per session type frames, since they go to
* different nodes */
(smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
break;
case SESSION_IO_EVT_RX:
s = session_event_get_session (e, thread_index);
if (!s)
break;
transport_app_rx_evt (session_get_transport_proto (s),
s->connection_index, s->thread_index);
break;
case SESSION_IO_EVT_BUILTIN_RX:
s = session_event_get_session (e, thread_index);
if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
break;
svm_fifo_unset_event (s->rx_fifo);
app_wrk = app_worker_get (s->app_wrk_index);
app_worker_builtin_rx (app_wrk, s);
break;
case SESSION_IO_EVT_BUILTIN_TX:
s = session_get_from_handle_if_valid (e->session_handle);
wrk->ctx.s = s;
if (PREDICT_TRUE (s != 0))
session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
break;
default:
clib_warning ("unhandled event type %d", e->event_type);
}
/* Regrab elements in case pool moved */
elt = pool_elt_at_index (wrk->event_elts, ei);
if (!clib_llist_elt_is_linked (elt, evt_list))
session_evt_elt_free (wrk, elt);
}
/* *INDENT-OFF* */
static const u32 session_evt_msg_sizes[] = {
#define _(symc, sym) \
[SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
foreach_session_ctrl_evt
#undef _
};
/* *INDENT-ON* */
always_inline void
session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
{
session_evt_elt_t *elt;
if (evt->event_type >= SESSION_CTRL_EVT_RPC)
{
elt = session_evt_alloc_ctrl (wrk);
if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
{
elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
elt->evt.event_type = evt->event_type;
clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
session_evt_msg_sizes[evt->event_type]);
}
else
{
/* Internal control events fit into io events footprint */
clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
}
}
else
{
elt = session_evt_alloc_new (wrk);
clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
}
}
static void
session_flush_pending_tx_buffers (session_worker_t * wrk,
vlib_node_runtime_t * node)
{
vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
wrk->pending_tx_nexts,
vec_len (wrk->pending_tx_nexts));
vec_reset_length (wrk->pending_tx_buffers);
vec_reset_length (wrk->pending_tx_nexts);
}
static uword
session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
session_main_t *smm = vnet_get_session_main ();
u32 thread_index = vm->thread_index, n_to_dequeue;
session_worker_t *wrk = &smm->wrk[thread_index];
session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
clib_llist_index_t ei, next_ei, old_ti;
svm_msg_q_msg_t _msg, *msg = &_msg;
int i, n_tx_packets;
session_event_t *evt;
svm_msg_q_t *mq;
SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
wrk->last_vlib_time = vlib_time_now (vm);
wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
/*
* Update transport time
*/
transport_update_time (wrk->last_vlib_time, thread_index);
n_tx_packets = vec_len (wrk->pending_tx_buffers);
/*
* Dequeue and handle new events
*/
/* Try to dequeue what is available. Don't wait for lock.
* XXX: we may need priorities here */
mq = wrk->vpp_event_queue;
n_to_dequeue = svm_msg_q_size (mq);
if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
{
for (i = 0; i < n_to_dequeue; i++)
{
svm_msg_q_sub_w_lock (mq, msg);
evt = svm_msg_q_msg_data (mq, msg);
session_evt_add_to_list (wrk, evt);
svm_msg_q_free_msg (mq, msg);
}
svm_msg_q_unlock (mq);
}
/*
* Handle control events
*/
ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
/* *INDENT-OFF* */
clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
clib_llist_remove (wrk->event_elts, evt_list, elt);
session_event_dispatch_ctrl (wrk, elt);
}));
/* *INDENT-ON* */
/*
* Handle the new io events.
*/
new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
old_ti = clib_llist_prev_index (old_he, evt_list);
ei = clib_llist_next_index (new_he, evt_list);
while (ei != wrk->new_head && n_tx_packets < VLIB_FRAME_SIZE)
{
elt = pool_elt_at_index (wrk->event_elts, ei);
ei = clib_llist_next_index (elt, evt_list);
clib_llist_remove (wrk->event_elts, evt_list, elt);
session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
}
/*
* Handle the old io events, if we had any prior to processing the new ones
*/
if (old_ti != wrk->old_head)
{
old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
ei = clib_llist_next_index (old_he, evt_list);
while (n_tx_packets < VLIB_FRAME_SIZE)
{
elt = pool_elt_at_index (wrk->event_elts, ei);
next_ei = clib_llist_next_index (elt, evt_list);
clib_llist_remove (wrk->event_elts, evt_list, elt);
session_event_dispatch_io (wrk, node, elt, thread_index,
&n_tx_packets);
if (ei == old_ti)
break;
ei = next_ei;
};
}
if (vec_len (wrk->pending_tx_buffers))
session_flush_pending_tx_buffers (wrk, node);
vlib_node_increment_counter (vm, session_queue_node.index,
SESSION_QUEUE_ERROR_TX, n_tx_packets);
SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
return n_tx_packets;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (session_queue_node) =
{
.function = session_queue_node_fn,
.flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
.name = "session-queue",
.format_trace = format_session_queue_trace,
.type = VLIB_NODE_TYPE_INPUT,
.n_errors = ARRAY_LEN (session_queue_error_strings),
.error_strings = session_queue_error_strings,
.state = VLIB_NODE_STATE_DISABLED,
};
/* *INDENT-ON* */
void
dump_thread_0_event_queue (void)
{
session_main_t *smm = vnet_get_session_main ();
vlib_main_t *vm = &vlib_global_main;
u32 my_thread_index = vm->thread_index;
session_event_t _e, *e = &_e;
svm_msg_q_ring_t *ring;
session_t *s0;
svm_msg_q_msg_t *msg;
svm_msg_q_t *mq;
int i, index;
mq = smm->wrk[my_thread_index].vpp_event_queue;
index = mq->q->head;
for (i = 0; i < mq->q->cursize; i++)
{
msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
ring = svm_msg_q_ring (mq, msg->ring_index);
clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
switch (e->event_type)
{
case SESSION_IO_EVT_TX:
s0 = session_event_get_session (e, my_thread_index);
fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
break;
case SESSION_CTRL_EVT_CLOSE:
s0 = session_get_from_handle (e->session_handle);
fformat (stdout, "[%04d] disconnect session %d\n", i,
s0->session_index);
break;
case SESSION_IO_EVT_BUILTIN_RX:
s0 = session_event_get_session (e, my_thread_index);
fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
break;
case SESSION_CTRL_EVT_RPC:
fformat (stdout, "[%04d] RPC call %llx with %llx\n",
i, (u64) (uword) (e->rpc_args.fp),
(u64) (uword) (e->rpc_args.arg));
break;
default:
fformat (stdout, "[%04d] unhandled event type %d\n",
i, e->event_type);
break;
}
index++;
if (index == mq->q->maxsize)
index = 0;
}
}
static u8
session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
{
session_t *s;
switch (e->event_type)
{
case SESSION_IO_EVT_RX:
case SESSION_IO_EVT_TX:
case SESSION_IO_EVT_BUILTIN_RX:
case SESSION_IO_EVT_BUILTIN_TX:
case SESSION_IO_EVT_TX_FLUSH:
if (e->session_index == f->master_session_index)
return 1;
break;
case SESSION_CTRL_EVT_CLOSE:
break;
case SESSION_CTRL_EVT_RPC:
s = session_get_from_handle (e->session_handle);
if (!s)
{
clib_warning ("session has event but doesn't exist!");
break;
}
if (s->rx_fifo == f || s->tx_fifo == f)
return 1;
break;
default:
break;
}
return 0;
}
u8
session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
{
session_evt_elt_t *elt;
session_worker_t *wrk;
int i, index, found = 0;
svm_msg_q_msg_t *msg;
svm_msg_q_ring_t *ring;
svm_msg_q_t *mq;
u8 thread_index;
ASSERT (e);
thread_index = f->master_thread_index;
wrk = session_main_get_worker (thread_index);
/*
* Search evt queue
*/
mq = wrk->vpp_event_queue;
index = mq->q->head;
for (i = 0; i < mq->q->cursize; i++)
{
msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
ring = svm_msg_q_ring (mq, msg->ring_index);
clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
found = session_node_cmp_event (e, f);
if (found)
return 1;
index = (index + 1) % mq->q->maxsize;
}
/*
* Search pending events vector
*/
/* *INDENT-OFF* */
clib_llist_foreach (wrk->event_elts, evt_list,
pool_elt_at_index (wrk->event_elts, wrk->new_head),
elt, ({
found = session_node_cmp_event (&elt->evt, f);
if (found)
{
clib_memcpy_fast (e, &elt->evt, sizeof (*e));
goto done;
}
}));
/* *INDENT-ON* */
/* *INDENT-OFF* */
clib_llist_foreach (wrk->event_elts, evt_list,
pool_elt_at_index (wrk->event_elts, wrk->old_head),
elt, ({
found = session_node_cmp_event (&elt->evt, f);
if (found)
{
clib_memcpy_fast (e, &elt->evt, sizeof (*e));
goto done;
}
}));
/* *INDENT-ON* */
done:
return found;
}
static clib_error_t *
session_queue_exit (vlib_main_t * vm)
{
if (vec_len (vlib_mains) < 2)
return 0;
/*
* Shut off (especially) worker-thread session nodes.
* Otherwise, vpp can crash as the main thread unmaps the
* API segment.
*/
vlib_worker_thread_barrier_sync (vm);
session_node_enable_disable (0 /* is_enable */ );
vlib_worker_thread_barrier_release (vm);
return 0;
}
VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
static uword
session_queue_run_on_main (vlib_main_t * vm)
{
vlib_node_runtime_t *node;
node = vlib_node_get_runtime (vm, session_queue_node.index);
return session_queue_node_fn (vm, node, 0);
}
static uword
session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
vlib_frame_t * f)
{
uword *event_data = 0;
f64 timeout = 1.0;
uword event_type;
while (1)
{
vlib_process_wait_for_event_or_clock (vm, timeout);
event_type = vlib_process_get_events (vm, (uword **) & event_data);
switch (event_type)
{
case SESSION_Q_PROCESS_RUN_ON_MAIN:
/* Run session queue node on main thread */
session_queue_run_on_main (vm);
break;
case SESSION_Q_PROCESS_STOP:
timeout = 100000.0;
break;
case ~0:
/* Timed out. Run on main to ensure all events are handled */
session_queue_run_on_main (vm);
break;
}
vec_reset_length (event_data);
}
return 0;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (session_queue_process_node) =
{
.function = session_queue_process,
.type = VLIB_NODE_TYPE_PROCESS,
.name = "session-queue-process",
.state = VLIB_NODE_STATE_DISABLED,
};
/* *INDENT-ON* */
static_always_inline uword
session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
session_main_t *sm = &session_main;
if (!sm->wrk[0].vpp_event_queue)
return 0;
node = vlib_node_get_runtime (vm, session_queue_node.index);
return session_queue_node_fn (vm, node, frame);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (session_queue_pre_input_node) =
{
.function = session_queue_pre_input_inline,
.type = VLIB_NODE_TYPE_PRE_INPUT,
.name = "session-queue-main",
.state = VLIB_NODE_STATE_DISABLED,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/