blob: c61e89bf39851fe642a60fe107567e174928d84c [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>
#include <sys/timerfd.h>
static inline void
session_wrk_send_evt_to_main (session_worker_t *wrk, session_evt_elt_t *elt)
{
session_evt_elt_t *he;
uword thread_index;
u8 is_empty;
thread_index = wrk->vm->thread_index;
he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main);
is_empty = clib_llist_is_empty (wrk->event_elts, evt_list, he);
clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
if (is_empty)
session_send_rpc_evt_to_thread (0, session_wrk_handle_evts_main_rpc,
uword_to_pointer (thread_index, void *));
}
#define app_check_thread_and_barrier(_wrk, _elt) \
if (!vlib_thread_is_main_w_barrier ()) \
{ \
session_wrk_send_evt_to_main (wrk, elt); \
return; \
}
static void
session_wrk_timerfd_update (session_worker_t *wrk, u64 time_ns)
{
struct itimerspec its;
its.it_value.tv_sec = 0;
its.it_value.tv_nsec = time_ns;
its.it_interval.tv_sec = 0;
its.it_interval.tv_nsec = its.it_value.tv_nsec;
if (timerfd_settime (wrk->timerfd, 0, &its, NULL) == -1)
clib_warning ("timerfd_settime");
}
always_inline u64
session_wrk_tfd_timeout (session_wrk_state_t state, u32 thread_index)
{
if (state == SESSION_WRK_INTERRUPT)
return thread_index ? 1e6 : vlib_num_workers () ? 5e8 : 1e6;
else if (state == SESSION_WRK_IDLE)
return thread_index ? 1e8 : vlib_num_workers () ? 5e8 : 1e8;
else
return 0;
}
static inline void
session_wrk_set_state (session_worker_t *wrk, session_wrk_state_t state)
{
u64 time_ns;
wrk->state = state;
if (wrk->timerfd == -1)
return;
time_ns = session_wrk_tfd_timeout (state, wrk->vm->thread_index);
session_wrk_timerfd_update (wrk, time_ns);
}
static transport_endpt_ext_cfg_t *
session_mq_get_ext_config (application_t *app, uword offset)
{
svm_fifo_chunk_t *c;
fifo_segment_t *fs;
fs = application_get_rx_mqs_segment (app);
c = fs_chunk_ptr (fs->h, offset);
return (transport_endpt_ext_cfg_t *) c->data;
}
static void
session_mq_free_ext_config (application_t *app, uword offset)
{
svm_fifo_chunk_t *c;
fifo_segment_t *fs;
fs = application_get_rx_mqs_segment (app);
c = fs_chunk_ptr (fs->h, offset);
fifo_segment_collect_chunk (fs, 0 /* only one slice */, c);
}
static void
session_mq_listen_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
vnet_listen_args_t _a, *a = &_a;
session_listen_msg_t *mp;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (wrk, elt);
mp = session_evt_ctrl_data (wrk, elt);
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->sep.is_ip4 = mp->is_ip4;
ip_copy (&a->sep.ip, &mp->ip, mp->is_ip4);
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->app_index = app->app_index;
a->wrk_map_index = mp->wrk_index;
a->sep_ext.transport_flags = mp->flags;
if (mp->ext_config)
a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config);
if ((rv = vnet_listen (a)))
clib_warning ("listen returned: %U", format_session_error, rv);
app_wrk = application_get_worker (app, mp->wrk_index);
mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
if (mp->ext_config)
session_mq_free_ext_config (app, mp->ext_config);
}
static void
session_mq_listen_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
vnet_listen_args_t _a, *a = &_a;
session_listen_uri_msg_t *mp;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (wrk, elt);
mp = session_evt_ctrl_data (wrk, elt);
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_one (session_connect_msg_t *mp)
{
vnet_connect_args_t _a, *a = &_a;
app_worker_t *app_wrk;
application_t *app;
int rv;
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;
a->sep.dscp = mp->dscp;
clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
if (mp->is_ip4)
{
ip46_address_mask_ip4 (&a->sep.ip);
ip46_address_mask_ip4 (&a->sep.peer.ip);
}
a->sep.peer.port = mp->lcl_port;
a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
a->sep_ext.parent_handle = mp->parent_handle;
a->sep_ext.transport_flags = mp->flags;
a->api_context = mp->context;
a->app_index = app->app_index;
a->wrk_map_index = mp->wrk_index;
if (mp->ext_config)
a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config);
if ((rv = vnet_connect (a)))
{
clib_warning ("connect returned: %U", format_session_error, rv);
app_wrk = application_get_worker (app, mp->wrk_index);
mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
}
if (mp->ext_config)
session_mq_free_ext_config (app, mp->ext_config);
}
static void
session_mq_handle_connects_rpc (void *arg)
{
u32 max_connects = 32, n_connects = 0;
session_evt_elt_t *he, *elt, *next;
session_worker_t *fwrk;
ASSERT (session_vlib_thread_is_cl_thread ());
/* Pending connects on linked list pertaining to first worker */
fwrk = session_main_get_worker (transport_cl_thread ());
if (!fwrk->n_pending_connects)
return;
he = clib_llist_elt (fwrk->event_elts, fwrk->pending_connects);
elt = clib_llist_next (fwrk->event_elts, evt_list, he);
/* Avoid holding the worker for too long */
while (n_connects < max_connects && elt != he)
{
next = clib_llist_next (fwrk->event_elts, evt_list, elt);
clib_llist_remove (fwrk->event_elts, evt_list, elt);
session_mq_connect_one (session_evt_ctrl_data (fwrk, elt));
session_evt_ctrl_data_free (fwrk, elt);
clib_llist_put (fwrk->event_elts, elt);
elt = next;
n_connects += 1;
}
/* Decrement with worker barrier */
fwrk->n_pending_connects -= n_connects;
if (fwrk->n_pending_connects > 0)
{
session_send_rpc_evt_to_thread_force (fwrk->vm->thread_index,
session_mq_handle_connects_rpc, 0);
}
}
static void
session_mq_connect_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
u32 thread_index = wrk - session_main.wrk;
session_evt_elt_t *he;
if (PREDICT_FALSE (thread_index > transport_cl_thread ()))
{
clib_warning ("Connect on wrong thread. Dropping");
return;
}
/* If on worker, check if main has any pending messages. Avoids reordering
* with other control messages that need to be handled by main
*/
if (thread_index)
{
he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main);
/* Events pending on main, postpone to avoid reordering */
if (!clib_llist_is_empty (wrk->event_elts, evt_list, he))
{
clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
return;
}
}
/* Add to pending list to be handled by first worker */
he = clib_llist_elt (wrk->event_elts, wrk->pending_connects);
clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
/* Decremented with worker barrier */
wrk->n_pending_connects += 1;
if (wrk->n_pending_connects == 1)
{
session_send_rpc_evt_to_thread_force (thread_index,
session_mq_handle_connects_rpc, 0);
}
}
static void
session_mq_connect_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
vnet_connect_args_t _a, *a = &_a;
session_connect_uri_msg_t *mp;
app_worker_t *app_wrk;
application_t *app;
int rv;
app_check_thread_and_barrier (wrk, elt);
mp = session_evt_ctrl_data (wrk, elt);
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, rv);
}
}
static void
session_mq_shutdown_handler (void *data)
{
session_shutdown_msg_t *mp = (session_shutdown_msg_t *) data;
vnet_shutdown_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_shutdown_session (a);
}
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 (session_worker_t *wrk, session_evt_elt_t *elt)
{
vnet_app_detach_args_t _a, *a = &_a;
session_app_detach_msg_t *mp;
application_t *app;
app_check_thread_and_barrier (wrk, elt);
mp = session_evt_ctrl_data (wrk, elt);
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 (session_worker_t *wrk, session_evt_elt_t *elt)
{
vnet_unlisten_args_t _a, *a = &_a;
session_unlisten_msg_t *mp;
app_worker_t *app_wrk;
session_handle_t sh;
application_t *app;
int rv;
app_check_thread_and_barrier (wrk, elt);
mp = session_evt_ctrl_data (wrk, elt);
sh = mp->handle;
app = application_lookup (mp->client_index);
if (!app)
return;
clib_memset (a, 0, sizeof (*a));
a->app_index = app->app_index;
a->handle = sh;
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, sh, mp->context, rv);
}
static void
session_mq_accepted_reply_handler (session_worker_t *wrk,
session_evt_elt_t *elt)
{
vnet_disconnect_args_t _a = { 0 }, *a = &_a;
session_accepted_reply_msg_t *mp;
session_state_t old_state;
app_worker_t *app_wrk;
session_t *s;
mp = session_evt_ctrl_data (wrk, elt);
/* Mail this back from the main thread. We're not polling in main
* thread so we're using other workers for notifications. */
if (session_thread_from_handle (mp->handle) == 0 && vlib_num_workers () &&
vlib_get_thread_index () != 0)
{
session_wrk_send_evt_to_main (wrk, elt);
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;
}
/* Server isn't interested, disconnect the session */
if (mp->retval)
{
a->app_index = mp->context;
a->handle = mp->handle;
vnet_disconnect_session (a);
return;
}
/* Special handling for cut-through sessions */
if (!session_has_transport (s))
{
session_set_state (s, SESSION_STATE_READY);
ct_session_connect_notify (s, SESSION_E_NONE);
return;
}
old_state = s->session_state;
session_set_state (s, 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);
session_set_state (s, 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;
if (s->rx_fifo)
rmp->rx_fifo = fifo_segment_fifo_offset (s->rx_fifo);
if (s->tx_fifo)
rmp->tx_fifo = fifo_segment_fifo_offset (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);
}
static void
session_mq_app_wrk_rpc_handler (void *data)
{
session_app_wrk_rpc_msg_t *mp = (session_app_wrk_rpc_msg_t *) data;
svm_msg_q_msg_t _msg, *msg = &_msg;
session_app_wrk_rpc_msg_t *rmp;
app_worker_t *app_wrk;
session_event_t *evt;
application_t *app;
app = application_lookup (mp->client_index);
if (!app)
return;
app_wrk = application_get_worker (app, mp->wrk_index);
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_APP_WRK_RPC;
rmp = (session_app_wrk_rpc_msg_t *) evt->data;
clib_memcpy (rmp->data, mp->data, sizeof (mp->data));
svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
}
static void
session_mq_transport_attr_handler (void *data)
{
session_transport_attr_msg_t *mp = (session_transport_attr_msg_t *) data;
session_transport_attr_reply_msg_t *rmp;
svm_msg_q_msg_t _msg, *msg = &_msg;
app_worker_t *app_wrk;
session_event_t *evt;
application_t *app;
session_t *s;
int rv;
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;
}
rv = session_transport_attribute (s, mp->is_get, &mp->attr);
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_TRANSPORT_ATTR_REPLY;
rmp = (session_transport_attr_reply_msg_t *) evt->data;
rmp->handle = mp->handle;
rmp->retval = rv;
rmp->is_get = mp->is_get;
if (!rv && mp->is_get)
rmp->attr = mp->attr;
svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
}
void
session_wrk_handle_evts_main_rpc (void *args)
{
vlib_main_t *vm = vlib_get_main ();
clib_llist_index_t ei, next_ei;
session_evt_elt_t *he, *elt;
session_worker_t *fwrk;
u32 thread_index;
vlib_worker_thread_barrier_sync (vm);
thread_index = pointer_to_uword (args);
fwrk = session_main_get_worker (thread_index);
he = clib_llist_elt (fwrk->event_elts, fwrk->evts_pending_main);
ei = clib_llist_next_index (he, evt_list);
while (ei != fwrk->evts_pending_main)
{
elt = clib_llist_elt (fwrk->event_elts, ei);
next_ei = clib_llist_next_index (elt, evt_list);
clib_llist_remove (fwrk->event_elts, evt_list, elt);
switch (elt->evt.event_type)
{
case SESSION_CTRL_EVT_LISTEN:
session_mq_listen_handler (fwrk, elt);
break;
case SESSION_CTRL_EVT_UNLISTEN:
session_mq_unlisten_handler (fwrk, elt);
break;
case SESSION_CTRL_EVT_APP_DETACH:
app_mq_detach_handler (fwrk, elt);
break;
case SESSION_CTRL_EVT_CONNECT_URI:
session_mq_connect_uri_handler (fwrk, elt);
break;
case SESSION_CTRL_EVT_ACCEPTED_REPLY:
session_mq_accepted_reply_handler (fwrk, elt);
break;
case SESSION_CTRL_EVT_CONNECT:
session_mq_connect_handler (fwrk, elt);
break;
default:
clib_warning ("unhandled %u", elt->evt.event_type);
ALWAYS_ASSERT (0);
break;
}
/* Regrab element in case pool moved */
elt = clib_llist_elt (fwrk->event_elts, ei);
if (!clib_llist_elt_is_linked (elt, evt_list))
{
session_evt_ctrl_data_free (fwrk, elt);
clib_llist_put (fwrk->event_elts, elt);
}
ei = next_ei;
}
vlib_worker_thread_barrier_release (vm);
}
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, tx, INFO, "Packets transmitted") \
_ (TIMER, timer, INFO, "Timer events") \
_ (NO_BUFFER, no_buffer, ERROR, "Out of buffers")
typedef enum
{
#define _(f, n, s, d) SESSION_QUEUE_ERROR_##f,
foreach_session_queue_error
#undef _
SESSION_QUEUE_N_ERROR,
} session_queue_error_t;
static vlib_error_desc_t session_error_counters[] = {
#define _(f, n, s, d) { #n, d, VL_COUNTER_SEVERITY_##s },
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, vlib_buffer_t **bufs, u16 n_segs,
session_t *s, u32 n_trace)
{
vlib_buffer_t **b = bufs;
while (n_trace && n_segs)
{
if (PREDICT_TRUE (vlib_trace_buffer (vm, node, next_index, b[0],
1 /* follow_chain */)))
{
session_queue_trace_t *t =
vlib_add_trace (vm, node, b[0], sizeof (*t));
t->session_index = s->session_index;
t->server_thread_index = s->thread_index;
n_trace--;
}
b++;
n_segs--;
}
vlib_set_trace_count (vm, node, n_trace);
}
always_inline int
session_tx_fill_dma_transfers (session_worker_t *wrk,
session_tx_context_t *ctx, vlib_buffer_t *b)
{
vlib_main_t *vm = wrk->vm;
u32 len_to_deq;
u8 *data0 = NULL;
int n_bytes_read, len_write;
svm_fifo_seg_t data_fs[2];
u32 n_segs = 2;
u16 n_transfers = 0;
/*
* 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);
n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset,
data_fs, &n_segs, len_to_deq);
len_write = n_bytes_read;
ASSERT (n_bytes_read == len_to_deq);
while (n_bytes_read)
{
wrk->batch_num++;
vlib_dma_batch_add (vm, wrk->batch, data0, data_fs[n_transfers].data,
data_fs[n_transfers].len);
data0 += data_fs[n_transfers].len;
n_bytes_read -= data_fs[n_transfers].len;
n_transfers++;
}
return len_write;
}
always_inline int
session_tx_fill_dma_transfers_tail (session_worker_t *wrk,
session_tx_context_t *ctx,
vlib_buffer_t *b, u32 len_to_deq, u8 *data)
{
vlib_main_t *vm = wrk->vm;
int n_bytes_read, len_write;
svm_fifo_seg_t data_fs[2];
u32 n_segs = 2;
u16 n_transfers = 0;
n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset,
data_fs, &n_segs, len_to_deq);
len_write = n_bytes_read;
ASSERT (n_bytes_read == len_to_deq);
while (n_bytes_read)
{
wrk->batch_num++;
vlib_dma_batch_add (vm, wrk->batch, data, data_fs[n_transfers].data,
data_fs[n_transfers].len);
data += data_fs[n_transfers].len;
n_bytes_read -= data_fs[n_transfers].len;
n_transfers++;
}
return len_write;
}
always_inline int
session_tx_copy_data (session_worker_t *wrk, session_tx_context_t *ctx,
vlib_buffer_t *b, u32 len_to_deq, u8 *data0)
{
int n_bytes_read;
if (PREDICT_TRUE (!wrk->dma_enabled))
n_bytes_read =
svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data0);
else
n_bytes_read = session_tx_fill_dma_transfers (wrk, ctx, b);
return n_bytes_read;
}
always_inline int
session_tx_copy_data_tail (session_worker_t *wrk, session_tx_context_t *ctx,
vlib_buffer_t *b, u32 len_to_deq, u8 *data)
{
int n_bytes_read;
if (PREDICT_TRUE (!wrk->dma_enabled))
n_bytes_read =
svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data);
else
n_bytes_read =
session_tx_fill_dma_transfers_tail (wrk, ctx, b, len_to_deq, data);
return n_bytes_read;
}
always_inline void
session_tx_fifo_chain_tail (session_worker_t *wrk, session_tx_context_t *ctx,
vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
{
vlib_main_t *vm = wrk->vm;
vlib_buffer_t *chain_b, *prev_b;
u32 chain_bi0, to_deq, left_from_seg;
int len_to_deq, n_bytes_read;
u8 *data, j;
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 = ctx->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 =
session_tx_copy_data_tail (wrk, ctx, b, 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;
u32 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, data);
ASSERT (n_bytes_read > 0);
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);
if (ctx->left_to_snd > n_bytes_read)
svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
(u8 *) & ctx->hdr);
}
else if (ctx->left_to_snd == n_bytes_read)
svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
sizeof (session_dgram_pre_hdr_t));
}
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 (session_worker_t *wrk, 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 = session_tx_copy_data (wrk, ctx, b, 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 (transport_connection_is_cless (ctx->tc))
{
ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
ip_copy (&ctx->tc->lcl_ip, &hdr->lcl_ip, ctx->tc->is_ip4);
/* Local port assumed to be bound, not overwriting it */
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);
if (ctx->left_to_snd > n_bytes_read)
svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
(u8 *) & ctx->hdr);
}
else if (ctx->left_to_snd == n_bytes_read)
svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
sizeof (session_dgram_pre_hdr_t));
}
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 (wrk, 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)
{
/* Allow accepting session to send custom packets.
* For instance, tcp want to send acks in established, but
* the app has not called accept() yet */
if (s->session_state == SESSION_STATE_ACCEPTING &&
(s->flags & SESSION_F_CUSTOM_TX))
return 0;
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;
}
}
else
{
if (s->session_state == SESSION_STATE_TRANSPORT_DELETED)
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;
n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
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)
{
u32 len, chain_limit;
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);
/* Zero length dgrams not supported */
if (PREDICT_FALSE (ctx->hdr.data_length == 0))
{
svm_fifo_dequeue_drop (ctx->s->tx_fifo, sizeof (ctx->hdr));
ctx->max_len_to_snd = 0;
return;
}
ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
len = ctx->hdr.data_length - ctx->hdr.data_offset;
if (ctx->hdr.gso_size)
{
ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, ctx->hdr.gso_size);
}
/* Process multiple dgrams if smaller than min (buf_space, mss).
* This avoids handling multiple dgrams if they require buffer
* chains */
chain_limit = clib_min (n_bytes_per_buf - TRANSPORT_MAX_HDRS_LEN,
ctx->sp.snd_mss);
if (ctx->hdr.data_length <= chain_limit)
{
u32 first_dgram_len, dgram_len, offset, max_offset;
session_dgram_hdr_t hdr;
ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, len);
offset = ctx->hdr.data_length + sizeof (session_dgram_hdr_t);
first_dgram_len = len;
max_offset = clib_min (ctx->max_dequeue, 16 << 10);
while (offset < max_offset)
{
svm_fifo_peek (ctx->s->tx_fifo, offset, sizeof (ctx->hdr),
(u8 *) & hdr);
dgram_len = hdr.data_length - hdr.data_offset;
if (offset + sizeof (hdr) + hdr.data_length >
ctx->max_dequeue ||
first_dgram_len != dgram_len)
break;
/* Assert here to allow test above with zero length dgrams */
ASSERT (hdr.data_length > hdr.data_offset);
len += dgram_len;
offset += sizeof (hdr) + hdr.data_length;
}
}
ctx->max_dequeue = len;
}
}
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;
}
ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
if (ctx->n_segs_per_evt > 1)
{
u32 n_bytes_last_seg, n_bufs_last_seg;
n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
n_bytes_last_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd
- ((ctx->n_segs_per_evt - 1) * ctx->sp.snd_mss);
ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
n_bufs_last_seg = ceil ((f64) n_bytes_last_seg / n_bytes_per_buf);
ctx->n_bufs_needed = ((ctx->n_segs_per_evt - 1) * ctx->n_bufs_per_seg)
+ n_bufs_last_seg;
}
else
{
n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd;
ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
ctx->n_bufs_needed = ctx->n_bufs_per_seg;
}
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);
}
else
{
transport_connection_deschedule (ctx->tc);
}
}
always_inline void
session_tx_add_pending_buffer (session_worker_t *wrk, u32 bi, u32 next_index)
{
if (PREDICT_TRUE (!wrk->dma_enabled))
{
vec_add1 (wrk->pending_tx_buffers, bi);
vec_add1 (wrk->pending_tx_nexts, next_index);
}
else
{
session_dma_transfer *dma_transfer = &wrk->dma_trans[wrk->trans_tail];
vec_add1 (dma_transfer->pending_tx_buffers, bi);
vec_add1 (dma_transfer->pending_tx_nexts, next_index);
}
}
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_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 = SESSION_NODE_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;
ctx->sp.max_burst_size = max_burst;
n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, &ctx->sp);
*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;
}
}
/* Connection previously descheduled because it had no data to send.
* Clear descheduled flag and reset pacer if in use */
if (transport_connection_is_descheduled (ctx->tc))
transport_connection_clear_descheduled (ctx->tc);
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;
}
vec_validate_aligned (ctx->tx_buffers, ctx->n_bufs_needed - 1,
CLIB_CACHE_LINE_BYTES);
n_bufs = vlib_buffer_alloc (vm, ctx->tx_buffers, ctx->n_bufs_needed);
if (PREDICT_FALSE (n_bufs < ctx->n_bufs_needed))
{
if (n_bufs)
vlib_buffer_free (vm, ctx->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;
}
if (transport_connection_is_tx_paced (ctx->tc))
transport_connection_tx_pacer_update_bytes (ctx->tc, ctx->max_len_to_snd);
ctx->left_to_snd = ctx->max_len_to_snd;
n_left = ctx->n_segs_per_evt;
vec_validate (ctx->transport_pending_bufs, n_left);
while (n_left >= 4)
{
vlib_buffer_t *b0, *b1;
u32 bi0, bi1;
pbi = ctx->tx_buffers[n_bufs - 3];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
pbi = ctx->tx_buffers[n_bufs - 4];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
bi0 = ctx->tx_buffers[--n_bufs];
bi1 = ctx->tx_buffers[--n_bufs];
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data);
session_tx_fill_buffer (wrk, ctx, b1, &n_bufs, peek_data);
ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0;
ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left + 1] = b1;
n_left -= 2;
session_tx_add_pending_buffer (wrk, bi0, next_index);
session_tx_add_pending_buffer (wrk, bi1, next_index);
}
while (n_left)
{
vlib_buffer_t *b0;
u32 bi0;
if (n_left > 1)
{
pbi = ctx->tx_buffers[n_bufs - 2];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
}
bi0 = ctx->tx_buffers[--n_bufs];
b0 = vlib_get_buffer (vm, bi0);
session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data);
ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0;
n_left -= 1;
session_tx_add_pending_buffer (wrk, bi0, next_index);
}
/* Ask transport to push headers */
ctx->transport_vft->push_header (ctx->tc, ctx->transport_pending_bufs,
ctx->n_segs_per_evt);
if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
session_tx_trace_frame (vm, node, next_index, ctx->transport_pending_bufs,
ctx->n_segs_per_evt, ctx->s, n_trace);
if (PREDICT_FALSE (n_bufs))
vlib_buffer_free (vm, ctx->tx_buffers, n_bufs);
*n_tx_packets += ctx->n_segs_per_evt;
SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
ctx->s->tx_fifo->shr->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)
{
u32 n_dequeued = ctx->max_len_to_snd;
if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
n_dequeued += ctx->n_segs_per_evt * SESSION_CONN_HDR_LEN;
if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, n_dequeued))
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 * elt, int *n_tx_packets)
{
transport_send_params_t *sp = &wrk->ctx.sp;
session_t *s = wrk->ctx.s;
u32 n_packets;
if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
return 0;
/* Clear custom-tx flag used to request reschedule for tx */
s->flags &= ~SESSION_F_CUSTOM_TX;
sp->flags = 0;
sp->bytes_dequeued = 0;
sp->max_burst_size = clib_min (SESSION_NODE_FRAME_SIZE - *n_tx_packets,
TRANSPORT_PACER_MAX_BURST_PKTS);
n_packets = transport_custom_tx (session_get_transport_proto (s), s, sp);
*n_tx_packets += n_packets;
if (s->flags & SESSION_F_CUSTOM_TX)
{
session_evt_add_old (wrk, elt);
}
else if (!(sp->flags & TRANSPORT_SND_F_DESCHED))
{
svm_fifo_unset_event (s->tx_fifo);
if (svm_fifo_max_dequeue_cons (s->tx_fifo))
if (svm_fifo_set_event (s->tx_fifo))
session_evt_add_head_old (wrk, elt);
}
if (sp->bytes_dequeued &&
svm_fifo_needs_deq_ntf (s->tx_fifo, sp->bytes_dequeued))
session_dequeue_notify (s);
return n_packets;
}
always_inline session_t *
session_event_get_session (session_worker_t * wrk, session_event_t * e)
{
if (PREDICT_FALSE (pool_is_free_index (wrk->sessions, e->session_index)))
return 0;
ASSERT (session_is_valid (e->session_index, wrk->vm->thread_index));
return pool_elt_at_index (wrk->sessions, e->session_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_HALF_CLOSE:
s = session_get_from_handle_if_valid (e->session_handle);
if (PREDICT_FALSE (!s))
break;
session_transport_half_close (s);
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 (wrk, elt);
break;
case SESSION_CTRL_EVT_LISTEN_URI:
session_mq_listen_uri_handler (wrk, elt);
break;
case SESSION_CTRL_EVT_UNLISTEN:
session_mq_unlisten_handler (wrk, elt);
break;
case SESSION_CTRL_EVT_CONNECT:
session_mq_connect_handler (wrk, elt);
break;
case SESSION_CTRL_EVT_CONNECT_URI:
session_mq_connect_uri_handler (wrk, elt);
break;
case SESSION_CTRL_EVT_SHUTDOWN:
session_mq_shutdown_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 (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 (wrk, elt);
break;
case SESSION_CTRL_EVT_APP_WRK_RPC:
session_mq_app_wrk_rpc_handler (session_evt_ctrl_data (wrk, elt));
break;
case SESSION_CTRL_EVT_TRANSPORT_ATTR:
session_mq_transport_attr_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 = clib_llist_elt (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);
clib_llist_put (wrk->event_elts, elt);
}
SESSION_EVT (SESSION_EVT_COUNTS, CNT_CTRL_EVTS, 1, wrk);
}
always_inline void
session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
session_evt_elt_t * elt, 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 (wrk, e);
if (PREDICT_FALSE (!s))
break;
CLIB_PREFETCH (s->tx_fifo, sizeof (*(s->tx_fifo)), 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 (wrk, e);
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 (wrk, e);
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_TX_MAIN:
s = session_get_if_valid (e->session_index, 0 /* main thread */);
if (PREDICT_FALSE (!s))
break;
wrk->ctx.s = s;
if (PREDICT_TRUE (s != 0))
(smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
break;
default:
clib_warning ("unhandled event type %d", e->event_type);
}
SESSION_EVT (SESSION_EVT_IO_EVT_COUNTS, e->event_type, 1, wrk);
/* Regrab elements in case pool moved */
elt = clib_llist_elt (wrk->event_elts, ei);
if (!clib_llist_elt_is_linked (elt, evt_list))
clib_llist_put (wrk->event_elts, 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_update_time_subscribers (session_main_t *smm, clib_time_type_t now,
u32 thread_index)
{
session_update_time_fn *fn;
vec_foreach (fn, smm->update_time_fns)
(*fn) (now, thread_index);
}
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_vec (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);
}
int
session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq)
{
svm_msg_q_msg_t _msg, *msg = &_msg;
u32 i, n_to_dequeue = 0;
session_event_t *evt;
n_to_dequeue = svm_msg_q_size (mq);
for (i = 0; i < n_to_dequeue; i++)
{
svm_msg_q_sub_raw (mq, msg);
evt = svm_msg_q_msg_data (mq, msg);
session_evt_add_to_list (wrk, evt);
svm_msg_q_free_msg (mq, msg);
}
return n_to_dequeue;
}
static void
session_wrk_update_state (session_worker_t *wrk)
{
vlib_main_t *vm = wrk->vm;
if (wrk->state == SESSION_WRK_POLLING)
{
if (clib_llist_elts (wrk->event_elts) == 4 &&
vlib_last_vectors_per_main_loop (vm) < 1)
{
session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT);
vlib_node_set_state (vm, session_queue_node.index,
VLIB_NODE_STATE_INTERRUPT);
}
}
else if (wrk->state == SESSION_WRK_INTERRUPT)
{
if (clib_llist_elts (wrk->event_elts) > 4 ||
vlib_last_vectors_per_main_loop (vm) > 1)
{
session_wrk_set_state (wrk, SESSION_WRK_POLLING);
vlib_node_set_state (vm, session_queue_node.index,
VLIB_NODE_STATE_POLLING);
}
else if (PREDICT_FALSE (!pool_elts (wrk->sessions)))
{
session_wrk_set_state (wrk, SESSION_WRK_IDLE);
}
}
else
{
if (clib_llist_elts (wrk->event_elts))
{
session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT);
}
}
}
static uword
session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
u32 thread_index = vm->thread_index, __clib_unused n_evts;
session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
session_main_t *smm = vnet_get_session_main ();
session_worker_t *wrk = &smm->wrk[thread_index];
clib_llist_index_t ei, next_ei, old_ti;
int n_tx_packets;
SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
session_wrk_update_time (wrk, vlib_time_now (vm));
/*
* Update transport time
*/
session_update_time_subscribers (smm, wrk->last_vlib_time, thread_index);
n_tx_packets = vec_len (wrk->pending_tx_buffers);
SESSION_EVT (SESSION_EVT_DSP_CNTRS, UPDATE_TIME, wrk);
if (PREDICT_FALSE (wrk->dma_enabled))
{
if (wrk->trans_head == ((wrk->trans_tail + 1) & (wrk->trans_size - 1)))
return 0;
wrk->batch = vlib_dma_batch_new (vm, wrk->config_index);
if (!wrk->batch)
return 0;
}
/*
* Dequeue new internal mq events
*/
n_evts = session_wrk_handle_mq (wrk, wrk->vpp_event_queue);
SESSION_EVT (SESSION_EVT_DSP_CNTRS, MQ_DEQ, wrk, n_evts);
/*
* Handle control events
*/
ei = wrk->ctrl_head;
ctrl_he = clib_llist_elt (wrk->event_elts, ei);
next_ei = clib_llist_next_index (ctrl_he, evt_list);
old_ti = clib_llist_prev_index (ctrl_he, evt_list);
while (ei != old_ti)
{
ei = next_ei;
elt = clib_llist_elt (wrk->event_elts, next_ei);
next_ei = clib_llist_next_index (elt, evt_list);
clib_llist_remove (wrk->event_elts, evt_list, elt);
session_event_dispatch_ctrl (wrk, elt);
}
SESSION_EVT (SESSION_EVT_DSP_CNTRS, CTRL_EVTS, wrk);
/*
* Handle the new io events.
*/
new_he = clib_llist_elt (wrk->event_elts, wrk->new_head);
old_he = clib_llist_elt (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 < SESSION_NODE_FRAME_SIZE)
{
elt = clib_llist_elt (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, &n_tx_packets);
}
SESSION_EVT (SESSION_EVT_DSP_CNTRS, NEW_IO_EVTS, wrk);
/*
* Handle the old io events, if we had any prior to processing the new ones
*/
if (old_ti != wrk->old_head)
{
old_he = clib_llist_elt (wrk->event_elts, wrk->old_head);
ei = clib_llist_next_index (old_he, evt_list);
while (n_tx_packets < SESSION_NODE_FRAME_SIZE)
{
elt = clib_llist_elt (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, &n_tx_packets);
if (ei == old_ti)
break;
ei = next_ei;
};
}
if (PREDICT_FALSE (wrk->dma_enabled))
{
if (wrk->batch_num)
{
vlib_dma_batch_set_cookie (vm, wrk->batch, wrk->trans_tail);
wrk->batch_num = 0;
wrk->trans_tail++;
if (wrk->trans_tail == wrk->trans_size)
wrk->trans_tail = 0;
}
vlib_dma_batch_submit (vm, wrk->batch);
}
SESSION_EVT (SESSION_EVT_DSP_CNTRS, OLD_IO_EVTS, wrk);
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);
if (wrk->flags & SESSION_WRK_F_ADAPTIVE)
session_wrk_update_state (wrk);
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 = SESSION_QUEUE_N_ERROR,
.error_counters = session_error_counters,
.state = VLIB_NODE_STATE_DISABLED,
};
/* *INDENT-ON* */
static clib_error_t *
session_wrk_tfd_read_ready (clib_file_t *cf)
{
session_worker_t *wrk = session_main_get_worker (cf->private_data);
u64 buf;
int rv;
vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
rv = read (wrk->timerfd, &buf, sizeof (buf));
if (rv < 0 && errno != EAGAIN)
clib_unix_warning ("failed");
return 0;
}
static clib_error_t *
session_wrk_tfd_write_ready (clib_file_t *cf)
{
return 0;
}
void
session_wrk_enable_adaptive_mode (session_worker_t *wrk)
{
u32 thread_index = wrk->vm->thread_index;
clib_file_t template = { 0 };
if ((wrk->timerfd = timerfd_create (CLOCK_MONOTONIC, TFD_NONBLOCK)) < 0)
clib_warning ("timerfd_create");
template.read_function = session_wrk_tfd_read_ready;
template.write_function = session_wrk_tfd_write_ready;
template.file_descriptor = wrk->timerfd;
template.private_data = thread_index;
template.polling_thread_index = thread_index;
template.description = format (0, "session-wrk-tfd-%u", thread_index);
wrk->timerfd_file = clib_file_add (&file_main, &template);
wrk->flags |= SESSION_WRK_F_ADAPTIVE;
}
static clib_error_t *
session_queue_exit (vlib_main_t * vm)
{
if (vlib_get_n_threads () < 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:
vlib_node_set_state (vm, session_queue_process_node.index,
VLIB_NODE_STATE_DISABLED);
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:
*/