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/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this
* 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 <vcl/vcl_private.h>
pthread_key_t vcl_worker_stop_key;
static const char *
vppcom_app_state_str (app_state_t state)
{
char *st;
switch (state)
{
case STATE_APP_START:
st = "STATE_APP_START";
break;
case STATE_APP_CONN_VPP:
st = "STATE_APP_CONN_VPP";
break;
case STATE_APP_ENABLED:
st = "STATE_APP_ENABLED";
break;
case STATE_APP_ATTACHED:
st = "STATE_APP_ATTACHED";
break;
default:
st = "UNKNOWN_APP_STATE";
break;
}
return st;
}
int
vcl_wait_for_app_state_change (app_state_t app_state)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
f64 timeout = clib_time_now (&wrk->clib_time) + vcm->cfg.app_timeout;
while (clib_time_now (&wrk->clib_time) < timeout)
{
if (vcm->app_state == app_state)
return VPPCOM_OK;
if (vcm->app_state == STATE_APP_FAILED)
return VPPCOM_ECONNABORTED;
}
VDBG (0, "VCL<%d>: timeout waiting for state %s (%d)", getpid (),
vppcom_app_state_str (app_state), app_state);
vcl_evt (VCL_EVT_SESSION_TIMEOUT, vcm, app_state);
return VPPCOM_ETIMEDOUT;
}
vcl_cut_through_registration_t *
vcl_ct_registration_lock_and_alloc (vcl_worker_t * wrk)
{
vcl_cut_through_registration_t *cr;
clib_spinlock_lock (&wrk->ct_registration_lock);
pool_get (wrk->cut_through_registrations, cr);
memset (cr, 0, sizeof (*cr));
cr->epoll_evt_conn_index = -1;
return cr;
}
u32
vcl_ct_registration_index (vcl_worker_t * wrk,
vcl_cut_through_registration_t * ctr)
{
return (ctr - wrk->cut_through_registrations);
}
void
vcl_ct_registration_lock (vcl_worker_t * wrk)
{
clib_spinlock_lock (&wrk->ct_registration_lock);
}
void
vcl_ct_registration_unlock (vcl_worker_t * wrk)
{
clib_spinlock_unlock (&wrk->ct_registration_lock);
}
vcl_cut_through_registration_t *
vcl_ct_registration_get (vcl_worker_t * wrk, u32 ctr_index)
{
if (pool_is_free_index (wrk->cut_through_registrations, ctr_index))
return 0;
return pool_elt_at_index (wrk->cut_through_registrations, ctr_index);
}
vcl_cut_through_registration_t *
vcl_ct_registration_lock_and_lookup (vcl_worker_t * wrk, uword mq_addr)
{
uword *p;
clib_spinlock_lock (&wrk->ct_registration_lock);
p = hash_get (wrk->ct_registration_by_mq, mq_addr);
if (!p)
return 0;
return vcl_ct_registration_get (wrk, p[0]);
}
void
vcl_ct_registration_lookup_add (vcl_worker_t * wrk, uword mq_addr,
u32 ctr_index)
{
hash_set (wrk->ct_registration_by_mq, mq_addr, ctr_index);
}
void
vcl_ct_registration_lookup_del (vcl_worker_t * wrk, uword mq_addr)
{
hash_unset (wrk->ct_registration_by_mq, mq_addr);
}
void
vcl_ct_registration_del (vcl_worker_t * wrk,
vcl_cut_through_registration_t * ctr)
{
pool_put (wrk->cut_through_registrations, ctr);
}
vcl_mq_evt_conn_t *
vcl_mq_evt_conn_alloc (vcl_worker_t * wrk)
{
vcl_mq_evt_conn_t *mqc;
pool_get (wrk->mq_evt_conns, mqc);
memset (mqc, 0, sizeof (*mqc));
return mqc;
}
u32
vcl_mq_evt_conn_index (vcl_worker_t * wrk, vcl_mq_evt_conn_t * mqc)
{
return (mqc - wrk->mq_evt_conns);
}
vcl_mq_evt_conn_t *
vcl_mq_evt_conn_get (vcl_worker_t * wrk, u32 mq_conn_idx)
{
return pool_elt_at_index (wrk->mq_evt_conns, mq_conn_idx);
}
int
vcl_mq_epoll_add_evfd (vcl_worker_t * wrk, svm_msg_q_t * mq)
{
struct epoll_event e = { 0 };
vcl_mq_evt_conn_t *mqc;
u32 mqc_index;
int mq_fd;
mq_fd = svm_msg_q_get_consumer_eventfd (mq);
if (wrk->mqs_epfd < 0 || mq_fd == -1)
return -1;
mqc = vcl_mq_evt_conn_alloc (wrk);
mqc_index = vcl_mq_evt_conn_index (wrk, mqc);
mqc->mq_fd = mq_fd;
mqc->mq = mq;
e.events = EPOLLIN;
e.data.u32 = mqc_index;
if (epoll_ctl (wrk->mqs_epfd, EPOLL_CTL_ADD, mq_fd, &e) < 0)
{
clib_warning ("failed to add mq eventfd to mq epoll fd");
return -1;
}
return mqc_index;
}
int
vcl_mq_epoll_del_evfd (vcl_worker_t * wrk, u32 mqc_index)
{
vcl_mq_evt_conn_t *mqc;
if (wrk->mqs_epfd || mqc_index == ~0)
return -1;
mqc = vcl_mq_evt_conn_get (wrk, mqc_index);
if (epoll_ctl (wrk->mqs_epfd, EPOLL_CTL_DEL, mqc->mq_fd, 0) < 0)
{
clib_warning ("failed to del mq eventfd to mq epoll fd");
return -1;
}
return 0;
}
static vcl_worker_t *
vcl_worker_alloc (void)
{
vcl_worker_t *wrk;
pool_get (vcm->workers, wrk);
memset (wrk, 0, sizeof (*wrk));
wrk->wrk_index = wrk - vcm->workers;
return wrk;
}
static void
vcl_worker_free (vcl_worker_t * wrk)
{
pool_put (vcm->workers, wrk);
}
static void
vcl_worker_cleanup (void *arg)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
VDBG (0, "cleaning up worker %u", wrk->wrk_index);
vcl_send_app_worker_add_del (0 /* is_add */ );
close (wrk->mqs_epfd);
hash_free (wrk->session_index_by_vpp_handles);
hash_free (wrk->ct_registration_by_mq);
clib_spinlock_free (&wrk->ct_registration_lock);
vec_free (wrk->mq_events);
vec_free (wrk->mq_msg_vector);
vcl_set_worker_index (~0);
vcl_worker_free (wrk);
}
vcl_worker_t *
vcl_worker_alloc_and_init ()
{
vcl_worker_t *wrk;
/* This was initialized already */
if (vcl_get_worker_index () != ~0)
return 0;
if (pool_elts (vcm->workers) == vcm->cfg.max_workers)
{
VDBG (0, "max-workers %u limit reached", vcm->cfg.max_workers);
return 0;
}
clib_spinlock_lock (&vcm->workers_lock);
wrk = vcl_worker_alloc ();
vcl_set_worker_index (wrk->wrk_index);
wrk->mqs_epfd = -1;
if (vcm->cfg.use_mq_eventfd)
{
wrk->mqs_epfd = epoll_create (1);
if (wrk->mqs_epfd < 0)
{
clib_unix_warning ("epoll_create() returned");
return 0;
}
}
wrk->session_index_by_vpp_handles = hash_create (0, sizeof (uword));
wrk->ct_registration_by_mq = hash_create (0, sizeof (uword));
clib_spinlock_init (&wrk->ct_registration_lock);
clib_time_init (&wrk->clib_time);
vec_validate (wrk->mq_events, 64);
vec_validate (wrk->mq_msg_vector, 128);
vec_reset_length (wrk->mq_msg_vector);
if (wrk->wrk_index == 0)
{
clib_spinlock_unlock (&vcm->workers_lock);
return wrk;
}
vcm->app_state = STATE_APP_ADDING_WORKER;
vcl_send_app_worker_add_del (1 /* is_add */ );
if (vcl_wait_for_app_state_change (STATE_APP_READY))
{
clib_warning ("failed to add worker to vpp");
return 0;
}
if (pthread_key_create (&vcl_worker_stop_key, vcl_worker_cleanup))
clib_warning ("failed to add pthread cleanup function");
clib_spinlock_unlock (&vcm->workers_lock);
VDBG (0, "added worker %u", wrk->wrk_index);
return wrk;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/