blob: 5758dc4b12d0cbf990f9362b80ceecc73dbc31d2 [file] [log] [blame]
/*
* Copyright (c) 2019 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_locked.h>
#include <vcl/vcl_private.h>
typedef struct vls_shared_data_
{
clib_spinlock_t lock;
u32 owner_wrk_index;
u32 *workers_subscribed;
clib_bitmap_t *listeners;
} vls_shared_data_t;
typedef struct vcl_locked_session_
{
clib_spinlock_t lock;
u32 session_index;
u32 worker_index;
u32 vls_index;
u32 shared_data_index;
/** VCL session owned by different workers because of migration */
u32 owner_vcl_wrk_index;
uword *vcl_wrk_index_to_session_index;
} vcl_locked_session_t;
typedef struct vls_worker_
{
vcl_locked_session_t *vls_pool;
uword *session_handle_to_vlsh_table;
u32 wrk_index;
} vls_worker_t;
typedef struct vls_local_
{
int vls_wrk_index;
volatile int vls_mt_n_threads;
pthread_mutex_t vls_mt_mq_mlock;
pthread_mutex_t vls_mt_spool_mlock;
volatile u8 select_mp_check;
volatile u8 epoll_mp_check;
} vls_process_local_t;
static vls_process_local_t vls_local;
static vls_process_local_t *vlsl = &vls_local;
typedef struct vls_main_
{
vls_worker_t *workers;
clib_rwlock_t vls_table_lock;
/** Pool of data shared by sessions owned by different workers */
vls_shared_data_t *shared_data_pool;
clib_rwlock_t shared_data_lock;
} vls_main_t;
vls_main_t *vlsm;
typedef enum vls_rpc_msg_type_
{
VLS_RPC_CLONE_AND_SHARE,
VLS_RPC_SESS_CLEANUP,
} vls_rpc_msg_type_e;
typedef struct vls_rpc_msg_
{
u8 type;
u8 data[0];
} vls_rpc_msg_t;
typedef struct vls_clone_and_share_msg_
{
u32 vls_index; /**< vls to be shared */
u32 session_index; /**< vcl session to be shared */
u32 origin_vls_wrk; /**< vls worker that initiated the rpc */
u32 origin_vls_index; /**< vls session of the originator */
u32 origin_vcl_wrk; /**< vcl worker that initiated the rpc */
u32 origin_session_index; /**< vcl session of the originator */
} vls_clone_and_share_msg_t;
typedef struct vls_sess_cleanup_msg_
{
u32 session_index; /**< vcl session to be cleaned */
u32 origin_vcl_wrk; /**< worker that initiated the rpc */
} vls_sess_cleanup_msg_t;
void vls_send_session_cleanup_rpc (vcl_worker_t * wrk,
u32 dst_wrk_index, u32 dst_session_index);
void vls_send_clone_and_share_rpc (vcl_worker_t * wrk,
vcl_locked_session_t * vls,
u32 session_index, u32 vls_wrk_index,
u32 dst_wrk_index, u32 dst_vls_index,
u32 dst_session_index);
static inline u32
vls_get_worker_index (void)
{
if (vls_mt_wrk_supported ())
return vlsl->vls_wrk_index;
else
return vcl_get_worker_index ();
}
static u32
vls_shared_data_alloc (void)
{
vls_shared_data_t *vls_shd;
u32 shd_index;
clib_rwlock_writer_lock (&vlsm->shared_data_lock);
pool_get_zero (vlsm->shared_data_pool, vls_shd);
clib_spinlock_init (&vls_shd->lock);
shd_index = vls_shd - vlsm->shared_data_pool;
clib_rwlock_writer_unlock (&vlsm->shared_data_lock);
return shd_index;
}
static u32
vls_shared_data_index (vls_shared_data_t * vls_shd)
{
return vls_shd - vlsm->shared_data_pool;
}
vls_shared_data_t *
vls_shared_data_get (u32 shd_index)
{
if (pool_is_free_index (vlsm->shared_data_pool, shd_index))
return 0;
return pool_elt_at_index (vlsm->shared_data_pool, shd_index);
}
static void
vls_shared_data_free (u32 shd_index)
{
vls_shared_data_t *vls_shd;
clib_rwlock_writer_lock (&vlsm->shared_data_lock);
vls_shd = vls_shared_data_get (shd_index);
clib_spinlock_free (&vls_shd->lock);
clib_bitmap_free (vls_shd->listeners);
vec_free (vls_shd->workers_subscribed);
pool_put (vlsm->shared_data_pool, vls_shd);
clib_rwlock_writer_unlock (&vlsm->shared_data_lock);
}
static inline void
vls_shared_data_pool_rlock (void)
{
clib_rwlock_reader_lock (&vlsm->shared_data_lock);
}
static inline void
vls_shared_data_pool_runlock (void)
{
clib_rwlock_reader_unlock (&vlsm->shared_data_lock);
}
static inline void
vls_mt_table_rlock (void)
{
if (vlsl->vls_mt_n_threads > 1)
clib_rwlock_reader_lock (&vlsm->vls_table_lock);
}
static inline void
vls_mt_table_runlock (void)
{
if (vlsl->vls_mt_n_threads > 1)
clib_rwlock_reader_unlock (&vlsm->vls_table_lock);
}
static inline void
vls_mt_table_wlock (void)
{
if (vlsl->vls_mt_n_threads > 1)
clib_rwlock_writer_lock (&vlsm->vls_table_lock);
}
static inline void
vls_mt_table_wunlock (void)
{
if (vlsl->vls_mt_n_threads > 1)
clib_rwlock_writer_unlock (&vlsm->vls_table_lock);
}
typedef enum
{
VLS_MT_OP_READ,
VLS_MT_OP_WRITE,
VLS_MT_OP_SPOOL,
VLS_MT_OP_XPOLL,
} vls_mt_ops_t;
typedef enum
{
VLS_MT_LOCK_MQ = 1 << 0,
VLS_MT_LOCK_SPOOL = 1 << 1
} vls_mt_lock_type_t;
static void
vls_mt_add (void)
{
vlsl->vls_mt_n_threads += 1;
/* If multi-thread workers are supported, for each new thread register a new
* vcl worker with vpp. Otherwise, all threads use the same vcl worker, so
* update the vcl worker's thread local worker index variable */
if (vls_mt_wrk_supported ())
vls_register_vcl_worker ();
else
vcl_set_worker_index (vlsl->vls_wrk_index);
}
static inline void
vls_mt_mq_lock (void)
{
pthread_mutex_lock (&vlsl->vls_mt_mq_mlock);
}
static inline void
vls_mt_mq_unlock (void)
{
pthread_mutex_unlock (&vlsl->vls_mt_mq_mlock);
}
static inline void
vls_mt_spool_lock (void)
{
pthread_mutex_lock (&vlsl->vls_mt_spool_mlock);
}
static inline void
vls_mt_create_unlock (void)
{
pthread_mutex_unlock (&vlsl->vls_mt_spool_mlock);
}
static void
vls_mt_locks_init (void)
{
pthread_mutex_init (&vlsl->vls_mt_mq_mlock, NULL);
pthread_mutex_init (&vlsl->vls_mt_spool_mlock, NULL);
}
u8
vls_is_shared (vcl_locked_session_t * vls)
{
return (vls->shared_data_index != ~0);
}
static inline void
vls_lock (vcl_locked_session_t * vls)
{
if ((vlsl->vls_mt_n_threads > 1) || vls_is_shared (vls))
clib_spinlock_lock (&vls->lock);
}
static inline void
vls_unlock (vcl_locked_session_t * vls)
{
if ((vlsl->vls_mt_n_threads > 1) || vls_is_shared (vls))
clib_spinlock_unlock (&vls->lock);
}
static inline vcl_session_handle_t
vls_to_sh (vcl_locked_session_t * vls)
{
return vcl_session_handle_from_index (vls->session_index);
}
static inline vcl_session_handle_t
vls_to_sh_tu (vcl_locked_session_t * vls)
{
vcl_session_handle_t sh;
sh = vls_to_sh (vls);
vls_mt_table_runlock ();
return sh;
}
static vls_worker_t *
vls_worker_get_current (void)
{
return pool_elt_at_index (vlsm->workers, vls_get_worker_index ());
}
static void
vls_worker_alloc (void)
{
vls_worker_t *wrk;
pool_get_zero (vlsm->workers, wrk);
wrk->wrk_index = vcl_get_worker_index ();
}
static void
vls_worker_free (vls_worker_t * wrk)
{
hash_free (wrk->session_handle_to_vlsh_table);
pool_free (wrk->vls_pool);
pool_put (vlsm->workers, wrk);
}
static vls_worker_t *
vls_worker_get (u32 wrk_index)
{
if (pool_is_free_index (vlsm->workers, wrk_index))
return 0;
return pool_elt_at_index (vlsm->workers, wrk_index);
}
static vls_handle_t
vls_alloc (vcl_session_handle_t sh)
{
vls_worker_t *wrk = vls_worker_get_current ();
vcl_locked_session_t *vls;
vls_mt_table_wlock ();
pool_get_zero (wrk->vls_pool, vls);
vls->session_index = vppcom_session_index (sh);
vls->worker_index = vppcom_session_worker (sh);
vls->vls_index = vls - wrk->vls_pool;
vls->shared_data_index = ~0;
hash_set (wrk->session_handle_to_vlsh_table, sh, vls->vls_index);
if (vls_mt_wrk_supported ())
{
hash_set (vls->vcl_wrk_index_to_session_index, vls->worker_index,
vls->session_index);
vls->owner_vcl_wrk_index = vls->worker_index;
}
clib_spinlock_init (&vls->lock);
vls_mt_table_wunlock ();
return vls->vls_index;
}
static vcl_locked_session_t *
vls_get (vls_handle_t vlsh)
{
vls_worker_t *wrk = vls_worker_get_current ();
if (pool_is_free_index (wrk->vls_pool, vlsh))
return 0;
return pool_elt_at_index (wrk->vls_pool, vlsh);
}
static void
vls_free (vcl_locked_session_t * vls)
{
vls_worker_t *wrk = vls_worker_get_current ();
ASSERT (vls != 0);
hash_unset (wrk->session_handle_to_vlsh_table,
vcl_session_handle_from_index (vls->session_index));
clib_spinlock_free (&vls->lock);
pool_put (wrk->vls_pool, vls);
}
static vcl_locked_session_t *
vls_get_and_lock (vls_handle_t vlsh)
{
vls_worker_t *wrk = vls_worker_get_current ();
vcl_locked_session_t *vls;
if (pool_is_free_index (wrk->vls_pool, vlsh))
return 0;
vls = pool_elt_at_index (wrk->vls_pool, vlsh);
vls_lock (vls);
return vls;
}
static vcl_locked_session_t *
vls_get_w_dlock (vls_handle_t vlsh)
{
vcl_locked_session_t *vls;
vls_mt_table_rlock ();
vls = vls_get_and_lock (vlsh);
if (!vls)
vls_mt_table_runlock ();
return vls;
}
static inline void
vls_get_and_unlock (vls_handle_t vlsh)
{
vcl_locked_session_t *vls;
vls_mt_table_rlock ();
vls = vls_get (vlsh);
vls_unlock (vls);
vls_mt_table_runlock ();
}
static inline void
vls_dunlock (vcl_locked_session_t * vls)
{
vls_unlock (vls);
vls_mt_table_runlock ();
}
static vcl_locked_session_t *
vls_session_get (vls_worker_t * wrk, u32 vls_index)
{
if (pool_is_free_index (wrk->vls_pool, vls_index))
return 0;
return pool_elt_at_index (wrk->vls_pool, vls_index);
}
vcl_session_handle_t
vlsh_to_sh (vls_handle_t vlsh)
{
vcl_locked_session_t *vls;
int rv;
vls = vls_get_w_dlock (vlsh);
if (!vls)
return INVALID_SESSION_ID;
rv = vls_to_sh (vls);
vls_dunlock (vls);
return rv;
}
vcl_session_handle_t
vlsh_to_session_index (vls_handle_t vlsh)
{
vcl_session_handle_t sh;
sh = vlsh_to_sh (vlsh);
return vppcom_session_index (sh);
}
vls_handle_t
vls_si_wi_to_vlsh (u32 session_index, u32 vcl_wrk_index)
{
vls_worker_t *wrk = vls_worker_get_current ();
uword *vlshp;
vlshp = hash_get (wrk->session_handle_to_vlsh_table,
vcl_session_handle_from_wrk_session_index (session_index,
vcl_wrk_index));
return vlshp ? *vlshp : VLS_INVALID_HANDLE;
}
vls_handle_t
vls_session_index_to_vlsh (uint32_t session_index)
{
vls_handle_t vlsh;
vls_mt_table_rlock ();
vlsh = vls_si_wi_to_vlsh (session_index, vcl_get_worker_index ());
vls_mt_table_runlock ();
return vlsh;
}
u8
vls_is_shared_by_wrk (vcl_locked_session_t * vls, u32 wrk_index)
{
vls_shared_data_t *vls_shd;
int i;
if (vls->shared_data_index == ~0)
return 0;
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls->shared_data_index);
clib_spinlock_lock (&vls_shd->lock);
for (i = 0; i < vec_len (vls_shd->workers_subscribed); i++)
if (vls_shd->workers_subscribed[i] == wrk_index)
{
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
return 1;
}
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
return 0;
}
static void
vls_listener_wrk_set (vcl_locked_session_t * vls, u32 wrk_index, u8 is_active)
{
vls_shared_data_t *vls_shd;
if (vls->shared_data_index == ~0)
{
clib_warning ("not a shared session");
return;
}
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls->shared_data_index);
clib_spinlock_lock (&vls_shd->lock);
clib_bitmap_set (vls_shd->listeners, wrk_index, is_active);
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
}
static u32
vls_shared_get_owner (vcl_locked_session_t * vls)
{
vls_shared_data_t *vls_shd;
u32 owner_wrk;
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls->shared_data_index);
owner_wrk = vls_shd->owner_wrk_index;
vls_shared_data_pool_runlock ();
return owner_wrk;
}
static u8
vls_listener_wrk_is_active (vcl_locked_session_t * vls, u32 wrk_index)
{
vls_shared_data_t *vls_shd;
u8 is_set;
if (vls->shared_data_index == ~0)
{
clib_warning ("not a shared session");
return 0;
}
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls->shared_data_index);
clib_spinlock_lock (&vls_shd->lock);
is_set = clib_bitmap_get (vls_shd->listeners, wrk_index);
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
return (is_set == 1);
}
static void
vls_listener_wrk_start_listen (vcl_locked_session_t * vls, u32 wrk_index)
{
vppcom_session_listen (vls_to_sh (vls), ~0);
vls_listener_wrk_set (vls, wrk_index, 1 /* is_active */ );
}
static void
vls_listener_wrk_stop_listen (vcl_locked_session_t * vls, u32 wrk_index)
{
vcl_worker_t *wrk;
vcl_session_t *s;
wrk = vcl_worker_get (wrk_index);
s = vcl_session_get (wrk, vls->session_index);
if (s->session_state != VCL_STATE_LISTEN)
return;
vcl_send_session_unlisten (wrk, s);
s->session_state = VCL_STATE_LISTEN_NO_MQ;
vls_listener_wrk_set (vls, wrk_index, 0 /* is_active */ );
}
static int
vls_shared_data_subscriber_position (vls_shared_data_t * vls_shd,
u32 wrk_index)
{
int i;
for (i = 0; i < vec_len (vls_shd->workers_subscribed); i++)
{
if (vls_shd->workers_subscribed[i] == wrk_index)
return i;
}
return -1;
}
int
vls_unshare_session (vcl_locked_session_t * vls, vcl_worker_t * wrk)
{
vls_shared_data_t *vls_shd;
int do_disconnect, pos;
u32 n_subscribers;
vcl_session_t *s;
if (vls->shared_data_index == ~0)
return 0;
s = vcl_session_get (wrk, vls->session_index);
if (s->session_state == VCL_STATE_LISTEN)
vls_listener_wrk_set (vls, wrk->wrk_index, 0 /* is_active */ );
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls->shared_data_index);
clib_spinlock_lock (&vls_shd->lock);
pos = vls_shared_data_subscriber_position (vls_shd, wrk->wrk_index);
if (pos < 0)
{
clib_warning ("worker %u not subscribed for vls %u", wrk->wrk_index,
vls->worker_index);
goto done;
}
/*
* Unsubscribe from share data and fifos
*/
if (s->rx_fifo)
{
svm_fifo_del_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
svm_fifo_del_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
}
vec_del1 (vls_shd->workers_subscribed, pos);
/*
* Cleanup vcl state
*/
n_subscribers = vec_len (vls_shd->workers_subscribed);
do_disconnect = s->session_state == VCL_STATE_LISTEN || !n_subscribers;
vcl_session_cleanup (wrk, s, vcl_session_handle (s), do_disconnect);
/*
* No subscriber left, cleanup shared data
*/
if (!n_subscribers)
{
u32 shd_index = vls_shared_data_index (vls_shd);
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
vls_shared_data_free (shd_index);
/* All locks have been dropped */
return 0;
}
/* Return, if this is not the owning worker */
if (vls_shd->owner_wrk_index != wrk->wrk_index)
goto done;
ASSERT (vec_len (vls_shd->workers_subscribed));
/*
* Check if we can change owner or close
*/
vls_shd->owner_wrk_index = vls_shd->workers_subscribed[0];
vcl_send_session_worker_update (wrk, s, vls_shd->owner_wrk_index);
/* XXX is this still needed? */
if (vec_len (vls_shd->workers_subscribed) > 1)
clib_warning ("more workers need to be updated");
done:
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
return 0;
}
void
vls_init_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
{
vls_shared_data_t *vls_shd;
u32 vls_shd_index = vls_shared_data_alloc ();
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls_shd_index);
vls_shd->owner_wrk_index = vls_wrk->wrk_index;
vls->shared_data_index = vls_shd_index;
vec_add1 (vls_shd->workers_subscribed, vls_wrk->wrk_index);
vls_shared_data_pool_runlock ();
}
void
vls_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
{
vcl_worker_t *vcl_wrk = vcl_worker_get (vls_wrk->wrk_index);
vls_shared_data_t *vls_shd;
vcl_session_t *s;
s = vcl_session_get (vcl_wrk, vls->session_index);
if (!s)
{
clib_warning ("wrk %u session %u vls %u NOT AVAILABLE",
vcl_wrk->wrk_index, vls->session_index, vls->vls_index);
return;
}
ASSERT (vls->shared_data_index != ~0);
/* Reinit session lock */
clib_spinlock_init (&vls->lock);
vls_shared_data_pool_rlock ();
vls_shd = vls_shared_data_get (vls->shared_data_index);
clib_spinlock_lock (&vls_shd->lock);
vec_add1 (vls_shd->workers_subscribed, vls_wrk->wrk_index);
clib_spinlock_unlock (&vls_shd->lock);
vls_shared_data_pool_runlock ();
if (s->rx_fifo)
{
svm_fifo_add_subscriber (s->rx_fifo, vcl_wrk->vpp_wrk_index);
svm_fifo_add_subscriber (s->tx_fifo, vcl_wrk->vpp_wrk_index);
}
else if (s->session_state == VCL_STATE_LISTEN)
{
s->session_state = VCL_STATE_LISTEN_NO_MQ;
}
}
static void
vls_share_sessions (vls_worker_t * vls_parent_wrk, vls_worker_t * vls_wrk)
{
vcl_locked_session_t *vls, *parent_vls;
/* *INDENT-OFF* */
pool_foreach (vls, vls_wrk->vls_pool, ({
/* Initialize sharing on parent session */
if (vls->shared_data_index == ~0)
{
parent_vls = vls_session_get (vls_parent_wrk, vls->vls_index);
vls_init_share_session (vls_parent_wrk, parent_vls);
vls->shared_data_index = parent_vls->shared_data_index;
}
vls_share_session (vls_wrk, vls);
}));
/* *INDENT-ON* */
}
void
vls_worker_copy_on_fork (vcl_worker_t * parent_wrk)
{
vls_worker_t *vls_wrk = vls_worker_get_current (), *vls_parent_wrk;
vcl_worker_t *wrk = vcl_worker_get_current ();
u32 vls_index, session_index, wrk_index;
vcl_session_handle_t sh;
/*
* init vcl worker
*/
wrk->vpp_event_queues = vec_dup (parent_wrk->vpp_event_queues);
wrk->sessions = pool_dup (parent_wrk->sessions);
wrk->session_index_by_vpp_handles =
hash_dup (parent_wrk->session_index_by_vpp_handles);
/*
* init vls worker
*/
vls_parent_wrk = vls_worker_get (parent_wrk->wrk_index);
/* *INDENT-OFF* */
hash_foreach (sh, vls_index, vls_parent_wrk->session_handle_to_vlsh_table,
({
vcl_session_handle_parse (sh, &wrk_index, &session_index);
hash_set (vls_wrk->session_handle_to_vlsh_table,
vcl_session_handle_from_index (session_index), vls_index);
}));
/* *INDENT-ON* */
vls_wrk->vls_pool = pool_dup (vls_parent_wrk->vls_pool);
vls_share_sessions (vls_parent_wrk, vls_wrk);
}
static void
vls_mt_acq_locks (vcl_locked_session_t * vls, vls_mt_ops_t op, int *locks_acq)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
vcl_session_t *s = 0;
int is_nonblk = 0;
if (vls)
{
s = vcl_session_get (wrk, vls->session_index);
if (PREDICT_FALSE (!s))
return;
is_nonblk = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
}
switch (op)
{
case VLS_MT_OP_READ:
if (!is_nonblk)
is_nonblk = vcl_session_read_ready (s) != 0;
if (!is_nonblk)
{
vls_mt_mq_lock ();
*locks_acq |= VLS_MT_LOCK_MQ;
}
break;
case VLS_MT_OP_WRITE:
ASSERT (s);
if (!is_nonblk)
is_nonblk = vcl_session_write_ready (s) != 0;
if (!is_nonblk)
{
vls_mt_mq_lock ();
*locks_acq |= VLS_MT_LOCK_MQ;
}
break;
case VLS_MT_OP_XPOLL:
vls_mt_mq_lock ();
*locks_acq |= VLS_MT_LOCK_MQ;
break;
case VLS_MT_OP_SPOOL:
vls_mt_spool_lock ();
*locks_acq |= VLS_MT_LOCK_SPOOL;
break;
default:
break;
}
}
static void
vls_mt_rel_locks (int locks_acq)
{
if (locks_acq & VLS_MT_LOCK_MQ)
vls_mt_mq_unlock ();
if (locks_acq & VLS_MT_LOCK_SPOOL)
vls_mt_create_unlock ();
}
static inline u8
vls_mt_session_should_migrate (vcl_locked_session_t * vls)
{
return (vls_mt_wrk_supported ()
&& vls->worker_index != vcl_get_worker_index ());
}
static void
vls_mt_session_migrate (vcl_locked_session_t * vls)
{
u32 wrk_index = vcl_get_worker_index ();
vcl_worker_t *wrk;
u32 src_sid, sid;
vcl_session_t *session;
uword *p;
ASSERT (vls_mt_wrk_supported () && vls->worker_index != wrk_index);
/*
* VCL session on current vcl worker already allocated. Update current
* owner worker and index and return
*/
if ((p = hash_get (vls->vcl_wrk_index_to_session_index, wrk_index)))
{
vls->worker_index = wrk_index;
vls->session_index = (u32) p[0];
return;
}
/*
* Ask vcl worker that owns the original vcl session to clone it into
* current vcl worker session pool
*/
if (!(p = hash_get (vls->vcl_wrk_index_to_session_index,
vls->owner_vcl_wrk_index)))
{
VERR ("session in owner worker(%u) is free", vls->owner_vcl_wrk_index);
ASSERT (0);
return;
}
src_sid = (u32) p[0];
wrk = vcl_worker_get_current ();
session = vcl_session_alloc (wrk);
sid = session->session_index;
vls_send_clone_and_share_rpc (wrk, vls, sid, vls_get_worker_index (),
vls->owner_vcl_wrk_index, vls->vls_index,
src_sid);
session->session_index = sid;
vls->worker_index = wrk_index;
vls->session_index = sid;
hash_set (vls->vcl_wrk_index_to_session_index, wrk_index, sid);
VDBG (1, "migrate session of worker (session): %u (%u) -> %u (%u)",
vls->owner_vcl_wrk_index, src_sid, wrk_index, sid);
if (PREDICT_FALSE (session->is_vep && session->vep.next_sh != ~0))
{
/* TODO: rollback? */
VERR ("can't migrate nonempty epoll session");
ASSERT (0);
return;
}
else if (PREDICT_FALSE (!session->is_vep &&
session->session_state != VCL_STATE_CLOSED))
{
/* TODO: rollback? */
VERR ("migrate NOT supported, session_status (%u)",
session->session_state);
ASSERT (0);
return;
}
}
static inline void
vls_mt_detect (void)
{
if (PREDICT_FALSE (vcl_get_worker_index () == ~0))
vls_mt_add ();
}
#define vls_mt_guard(_vls, _op) \
int _locks_acq = 0; \
if (vls_mt_wrk_supported ()) \
{ \
if (PREDICT_FALSE (_vls \
&& ((vcl_locked_session_t *)_vls)->worker_index != \
vcl_get_worker_index ())) \
vls_mt_session_migrate (_vls); \
} \
else \
{ \
if (PREDICT_FALSE (vlsl->vls_mt_n_threads > 1)) \
vls_mt_acq_locks (_vls, _op, &_locks_acq); \
} \
#define vls_mt_unguard() \
if (PREDICT_FALSE (_locks_acq)) \
vls_mt_rel_locks (_locks_acq)
int
vls_write (vls_handle_t vlsh, void *buf, size_t nbytes)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_WRITE);
rv = vppcom_session_write (vls_to_sh_tu (vls), buf, nbytes);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
int
vls_write_msg (vls_handle_t vlsh, void *buf, size_t nbytes)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_WRITE);
rv = vppcom_session_write_msg (vls_to_sh_tu (vls), buf, nbytes);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
int
vls_sendto (vls_handle_t vlsh, void *buf, int buflen, int flags,
vppcom_endpt_t * ep)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_WRITE);
rv = vppcom_session_sendto (vls_to_sh_tu (vls), buf, buflen, flags, ep);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
ssize_t
vls_read (vls_handle_t vlsh, void *buf, size_t nbytes)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_READ);
rv = vppcom_session_read (vls_to_sh_tu (vls), buf, nbytes);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
ssize_t
vls_recvfrom (vls_handle_t vlsh, void *buffer, uint32_t buflen, int flags,
vppcom_endpt_t * ep)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_READ);
rv = vppcom_session_recvfrom (vls_to_sh_tu (vls), buffer, buflen, flags,
ep);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
int
vls_attr (vls_handle_t vlsh, uint32_t op, void *buffer, uint32_t * buflen)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
if (vls_mt_session_should_migrate (vls))
vls_mt_session_migrate (vls);
rv = vppcom_session_attr (vls_to_sh_tu (vls), op, buffer, buflen);
vls_get_and_unlock (vlsh);
return rv;
}
int
vls_bind (vls_handle_t vlsh, vppcom_endpt_t * ep)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
rv = vppcom_session_bind (vls_to_sh_tu (vls), ep);
vls_get_and_unlock (vlsh);
return rv;
}
int
vls_listen (vls_handle_t vlsh, int q_len)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_XPOLL);
rv = vppcom_session_listen (vls_to_sh_tu (vls), q_len);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
int
vls_connect (vls_handle_t vlsh, vppcom_endpt_t * server_ep)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (vls, VLS_MT_OP_XPOLL);
rv = vppcom_session_connect (vls_to_sh_tu (vls), server_ep);
vls_mt_unguard ();
vls_get_and_unlock (vlsh);
return rv;
}
static inline void
vls_mp_checks (vcl_locked_session_t * vls, int is_add)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
vcl_session_t *s;
u32 owner_wrk;
if (vls_mt_wrk_supported ())
return;
s = vcl_session_get (wrk, vls->session_index);
switch (s->session_state)
{
case VCL_STATE_LISTEN:
if (is_add)
{
vls_listener_wrk_set (vls, vls->worker_index, 1 /* is_active */ );
break;
}
vls_listener_wrk_stop_listen (vls, vls->worker_index);
break;
case VCL_STATE_LISTEN_NO_MQ:
if (!is_add)
break;
/* Register worker as listener */
vls_listener_wrk_start_listen (vls, wrk->wrk_index);
/* If owner worker did not attempt to accept/xpoll on the session,
* force a listen stop for it, since it may not be interested in
* accepting new sessions.
* This is pretty much a hack done to give app workers the illusion
* that it is fine to listen and not accept new sessions for a
* given listener. Without it, we would accumulate unhandled
* accepts on the passive worker message queue. */
owner_wrk = vls_shared_get_owner (vls);
if (!vls_listener_wrk_is_active (vls, owner_wrk))
vls_listener_wrk_stop_listen (vls, owner_wrk);
break;
default:
break;
}
}
vls_handle_t
vls_accept (vls_handle_t listener_vlsh, vppcom_endpt_t * ep, int flags)
{
vls_handle_t accepted_vlsh;
vcl_locked_session_t *vls;
int sh;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (listener_vlsh)))
return VPPCOM_EBADFD;
if (vcl_n_workers () > 1)
vls_mp_checks (vls, 1 /* is_add */ );
vls_mt_guard (vls, VLS_MT_OP_SPOOL);
sh = vppcom_session_accept (vls_to_sh_tu (vls), ep, flags);
vls_mt_unguard ();
vls_get_and_unlock (listener_vlsh);
if (sh < 0)
return sh;
accepted_vlsh = vls_alloc (sh);
if (PREDICT_FALSE (accepted_vlsh == VLS_INVALID_HANDLE))
vppcom_session_close (sh);
return accepted_vlsh;
}
vls_handle_t
vls_create (uint8_t proto, uint8_t is_nonblocking)
{
vcl_session_handle_t sh;
vls_handle_t vlsh;
vls_mt_detect ();
vls_mt_guard (0, VLS_MT_OP_SPOOL);
sh = vppcom_session_create (proto, is_nonblocking);
vls_mt_unguard ();
if (sh == INVALID_SESSION_ID)
return VLS_INVALID_HANDLE;
vlsh = vls_alloc (sh);
if (PREDICT_FALSE (vlsh == VLS_INVALID_HANDLE))
vppcom_session_close (sh);
return vlsh;
}
static void
vls_mt_session_cleanup (vcl_locked_session_t * vls)
{
u32 session_index, wrk_index, current_vcl_wrk;
vcl_worker_t *wrk = vcl_worker_get_current ();
ASSERT (vls_mt_wrk_supported ());
current_vcl_wrk = vcl_get_worker_index ();
/* *INDENT-OFF* */
hash_foreach (wrk_index, session_index, vls->vcl_wrk_index_to_session_index,
({
if (current_vcl_wrk != wrk_index)
vls_send_session_cleanup_rpc (wrk, wrk_index, session_index);
}));
/* *INDENT-ON* */
hash_free (vls->vcl_wrk_index_to_session_index);
}
int
vls_close (vls_handle_t vlsh)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
vls_mt_table_wlock ();
vls = vls_get_and_lock (vlsh);
if (!vls)
{
vls_mt_table_wunlock ();
return VPPCOM_EBADFD;
}
vls_mt_guard (vls, VLS_MT_OP_SPOOL);
if (vls_is_shared (vls))
rv = vls_unshare_session (vls, vcl_worker_get_current ());
else
rv = vppcom_session_close (vls_to_sh (vls));
if (vls_mt_wrk_supported ())
vls_mt_session_cleanup (vls);
vls_free (vls);
vls_mt_unguard ();
vls_mt_table_wunlock ();
return rv;
}
vls_handle_t
vls_epoll_create (void)
{
vcl_session_handle_t sh;
vls_handle_t vlsh;
vls_mt_detect ();
sh = vppcom_epoll_create ();
if (sh == INVALID_SESSION_ID)
return VLS_INVALID_HANDLE;
vlsh = vls_alloc (sh);
if (vlsh == VLS_INVALID_HANDLE)
vppcom_session_close (sh);
return vlsh;
}
static void
vls_epoll_ctl_mp_checks (vcl_locked_session_t * vls, int op)
{
if (vcl_n_workers () <= 1)
{
vlsl->epoll_mp_check = 1;
return;
}
if (op == EPOLL_CTL_MOD)
return;
vlsl->epoll_mp_check = 1;
vls_mp_checks (vls, op == EPOLL_CTL_ADD);
}
int
vls_epoll_ctl (vls_handle_t ep_vlsh, int op, vls_handle_t vlsh,
struct epoll_event *event)
{
vcl_locked_session_t *ep_vls, *vls;
vcl_session_handle_t ep_sh, sh;
int rv;
vls_mt_detect ();
vls_mt_table_rlock ();
ep_vls = vls_get_and_lock (ep_vlsh);
vls = vls_get_and_lock (vlsh);
if (vls_mt_session_should_migrate (ep_vls))
vls_mt_session_migrate (ep_vls);
ep_sh = vls_to_sh (ep_vls);
sh = vls_to_sh (vls);
if (PREDICT_FALSE (!vlsl->epoll_mp_check))
vls_epoll_ctl_mp_checks (vls, op);
vls_mt_table_runlock ();
rv = vppcom_epoll_ctl (ep_sh, op, sh, event);
vls_mt_table_rlock ();
ep_vls = vls_get (ep_vlsh);
vls = vls_get (vlsh);
vls_unlock (vls);
vls_unlock (ep_vls);
vls_mt_table_runlock ();
return rv;
}
int
vls_epoll_wait (vls_handle_t ep_vlsh, struct epoll_event *events,
int maxevents, double wait_for_time)
{
vcl_locked_session_t *vls;
int rv;
vls_mt_detect ();
if (!(vls = vls_get_w_dlock (ep_vlsh)))
return VPPCOM_EBADFD;
vls_mt_guard (0, VLS_MT_OP_XPOLL);
rv = vppcom_epoll_wait (vls_to_sh_tu (vls), events, maxevents,
wait_for_time);
vls_mt_unguard ();
vls_get_and_unlock (ep_vlsh);
return rv;
}
static void
vls_select_mp_checks (vcl_si_set * read_map)
{
vcl_locked_session_t *vls;
vcl_worker_t *wrk;
vcl_session_t *s;
u32 si;
if (vcl_n_workers () <= 1)
{
vlsl->select_mp_check = 1;
return;
}
if (!read_map)
return;
vlsl->select_mp_check = 1;
wrk = vcl_worker_get_current ();
/* *INDENT-OFF* */
clib_bitmap_foreach (si, read_map, ({
s = vcl_session_get (wrk, si);
if (s->session_state == VCL_STATE_LISTEN)
{
vls = vls_get (vls_session_index_to_vlsh (si));
vls_mp_checks (vls, 1 /* is_add */);
}
}));
/* *INDENT-ON* */
}
int
vls_select (int n_bits, vcl_si_set * read_map, vcl_si_set * write_map,
vcl_si_set * except_map, double wait_for_time)
{
int rv;
vls_mt_detect ();
vls_mt_guard (0, VLS_MT_OP_XPOLL);
if (PREDICT_FALSE (!vlsl->select_mp_check))
vls_select_mp_checks (read_map);
rv = vppcom_select (n_bits, read_map, write_map, except_map, wait_for_time);
vls_mt_unguard ();
return rv;
}
static void
vls_unshare_vcl_worker_sessions (vcl_worker_t * wrk)
{
u32 current_wrk, is_current;
vcl_locked_session_t *vls;
vcl_session_t *s;
if (pool_elts (vcm->workers) <= 1)
return;
current_wrk = vcl_get_worker_index ();
is_current = current_wrk == wrk->wrk_index;
/* *INDENT-OFF* */
pool_foreach (s, wrk->sessions, ({
vls = vls_get (vls_si_wi_to_vlsh (s->session_index, wrk->wrk_index));
if (vls && (is_current || vls_is_shared_by_wrk (vls, current_wrk)))
vls_unshare_session (vls, wrk);
}));
/* *INDENT-ON* */
}
static void
vls_cleanup_vcl_worker (vcl_worker_t * wrk)
{
vls_worker_t *vls_wrk = vls_worker_get (wrk->wrk_index);
/* Unshare sessions and also cleanup worker since child may have
* called _exit () and therefore vcl may not catch the event */
vls_unshare_vcl_worker_sessions (wrk);
vcl_worker_cleanup (wrk, 1 /* notify vpp */ );
vls_worker_free (vls_wrk);
}
static void
vls_cleanup_forked_child (vcl_worker_t * wrk, vcl_worker_t * child_wrk)
{
vcl_worker_t *sub_child;
int tries = 0;
if (child_wrk->forked_child != ~0)
{
sub_child = vcl_worker_get_if_valid (child_wrk->forked_child);
if (sub_child)
{
/* Wait a bit, maybe the process is going away */
while (kill (sub_child->current_pid, 0) >= 0 && tries++ < 50)
usleep (1e3);
if (kill (sub_child->current_pid, 0) < 0)
vls_cleanup_forked_child (child_wrk, sub_child);
}
}
vls_cleanup_vcl_worker (child_wrk);
VDBG (0, "Cleaned up forked child wrk %u", child_wrk->wrk_index);
wrk->forked_child = ~0;
}
static struct sigaction old_sa;
static void
vls_intercept_sigchld_handler (int signum, siginfo_t * si, void *uc)
{
vcl_worker_t *wrk, *child_wrk;
if (vcl_get_worker_index () == ~0)
return;
if (sigaction (SIGCHLD, &old_sa, 0))
{
VERR ("couldn't restore sigchld");
exit (-1);
}
wrk = vcl_worker_get_current ();
if (wrk->forked_child == ~0)
return;
child_wrk = vcl_worker_get_if_valid (wrk->forked_child);
if (!child_wrk)
goto done;
if (si && si->si_pid != child_wrk->current_pid)
{
VDBG (0, "unexpected child pid %u", si->si_pid);
goto done;
}
vls_cleanup_forked_child (wrk, child_wrk);
done:
if (old_sa.sa_flags & SA_SIGINFO)
{
void (*fn) (int, siginfo_t *, void *) = old_sa.sa_sigaction;
fn (signum, si, uc);
}
else
{
void (*fn) (int) = old_sa.sa_handler;
if (fn)
fn (signum);
}
}
static void
vls_incercept_sigchld ()
{
struct sigaction sa;
clib_memset (&sa, 0, sizeof (sa));
sa.sa_sigaction = vls_intercept_sigchld_handler;
sa.sa_flags = SA_SIGINFO;
if (sigaction (SIGCHLD, &sa, &old_sa))
{
VERR ("couldn't intercept sigchld");
exit (-1);
}
}
static void
vls_app_pre_fork (void)
{
vls_incercept_sigchld ();
vcl_flush_mq_events ();
}
static void
vls_app_fork_child_handler (void)
{
vcl_worker_t *parent_wrk;
int parent_wrk_index;
parent_wrk_index = vcl_get_worker_index ();
VDBG (0, "initializing forked child %u with parent wrk %u", getpid (),
parent_wrk_index);
/*
* Clear old state
*/
vcl_set_worker_index (~0);
/*
* Allocate and register vcl worker with vpp
*/
if (vppcom_worker_register ())
{
VERR ("couldn't register new worker!");
return;
}
/*
* Allocate/initialize vls worker and share sessions
*/
vls_worker_alloc ();
parent_wrk = vcl_worker_get (parent_wrk_index);
vls_worker_copy_on_fork (parent_wrk);
parent_wrk->forked_child = vcl_get_worker_index ();
/* Reset number of threads and set wrk index */
vlsl->vls_mt_n_threads = 0;
vlsl->vls_wrk_index = vcl_get_worker_index ();
vlsl->select_mp_check = 0;
vlsl->epoll_mp_check = 0;
vls_mt_locks_init ();
VDBG (0, "forked child main worker initialized");
vcm->forking = 0;
}
static void
vls_app_fork_parent_handler (void)
{
vcm->forking = 1;
while (vcm->forking)
;
}
void
vls_app_exit (void)
{
vls_worker_t *wrk = vls_worker_get_current ();
/* Unshare the sessions. VCL will clean up the worker */
vls_unshare_vcl_worker_sessions (vcl_worker_get_current ());
vls_worker_free (wrk);
}
static void
vls_clone_and_share_rpc_handler (void *args)
{
vls_clone_and_share_msg_t *msg = (vls_clone_and_share_msg_t *) args;
vls_worker_t *wrk = vls_worker_get_current (), *dst_wrk;
vcl_locked_session_t *vls, *dst_vls;
vcl_worker_t *vcl_wrk = vcl_worker_get_current (), *dst_vcl_wrk;
vcl_session_t *s, *dst_s;
vls = vls_session_get (wrk, msg->vls_index);
if (!vls_mt_wrk_supported ())
vls_init_share_session (wrk, vls);
s = vcl_session_get (vcl_wrk, msg->session_index);
dst_wrk = vls_worker_get (msg->origin_vls_wrk);
dst_vcl_wrk = vcl_worker_get (msg->origin_vcl_wrk);
dst_vls = vls_session_get (dst_wrk, msg->origin_vls_index);
dst_vls->shared_data_index = vls->shared_data_index;
dst_s = vcl_session_get (dst_vcl_wrk, msg->origin_session_index);
clib_memcpy (dst_s, s, sizeof (*s));
dst_vcl_wrk->rpc_done = 1;
VDBG (1, "proces session clone of worker (session): %u (%u) -> %u (%u)",
vcl_wrk->wrk_index, msg->session_index, dst_vcl_wrk->wrk_index,
msg->origin_session_index);
}
static void
vls_session_cleanup_rpc_handler (void *args)
{
vls_sess_cleanup_msg_t *msg = (vls_sess_cleanup_msg_t *) args;
vcl_worker_t *wrk = vcl_worker_get_current ();
vcl_worker_t *dst_wrk = vcl_worker_get (msg->origin_vcl_wrk);
vppcom_session_close (vcl_session_handle_from_index (msg->session_index));
dst_wrk->rpc_done = 1;
VDBG (1, "proces session cleanup of worker (session): %u (%u) from %u ()",
wrk->wrk_index, msg->session_index, dst_wrk->wrk_index);
}
static void
vls_rpc_handler (void *args)
{
vls_rpc_msg_t *msg = (vls_rpc_msg_t *) args;
switch (msg->type)
{
case VLS_RPC_CLONE_AND_SHARE:
vls_clone_and_share_rpc_handler (msg->data);
break;
case VLS_RPC_SESS_CLEANUP:
vls_session_cleanup_rpc_handler (msg->data);
break;
default:
break;
}
}
void
vls_send_clone_and_share_rpc (vcl_worker_t * wrk,
vcl_locked_session_t * vls, u32 session_index,
u32 vls_wrk_index, u32 dst_wrk_index,
u32 dst_vls_index, u32 dst_session_index)
{
u8 data[sizeof (u8) + sizeof (vls_clone_and_share_msg_t)];
vls_clone_and_share_msg_t *msg;
vls_rpc_msg_t *rpc;
int ret;
rpc = (vls_rpc_msg_t *) & data;
rpc->type = VLS_RPC_CLONE_AND_SHARE;
msg = (vls_clone_and_share_msg_t *) & rpc->data;
msg->origin_vls_wrk = vls_wrk_index;
msg->origin_vls_index = vls->vls_index;
msg->origin_vcl_wrk = wrk->wrk_index;
msg->origin_session_index = session_index;
msg->vls_index = dst_vls_index;
msg->session_index = dst_session_index;
wrk->rpc_done = 0;
ret = vcl_send_worker_rpc (dst_wrk_index, rpc, sizeof (data));
VDBG (1, "send session clone to wrk (session): %u (%u) -> %u (%u), ret=%d",
dst_wrk_index, msg->session_index, msg->origin_vcl_wrk,
msg->origin_session_index, ret);
while (!ret && !wrk->rpc_done)
;
}
void
vls_send_session_cleanup_rpc (vcl_worker_t * wrk,
u32 dst_wrk_index, u32 dst_session_index)
{
u8 data[sizeof (u8) + sizeof (vls_sess_cleanup_msg_t)];
vls_sess_cleanup_msg_t *msg;
vls_rpc_msg_t *rpc;
int ret;
rpc = (vls_rpc_msg_t *) & data;
rpc->type = VLS_RPC_SESS_CLEANUP;
msg = (vls_sess_cleanup_msg_t *) & rpc->data;
msg->origin_vcl_wrk = wrk->wrk_index;
msg->session_index = dst_session_index;
wrk->rpc_done = 0;
ret = vcl_send_worker_rpc (dst_wrk_index, rpc, sizeof (data));
VDBG (1, "send session cleanup to wrk (session): %u (%u) from %u, ret=%d",
dst_wrk_index, msg->session_index, msg->origin_vcl_wrk, ret);
while (!ret && !wrk->rpc_done)
;
}
int
vls_app_create (char *app_name)
{
int rv;
if ((rv = vppcom_app_create (app_name)))
return rv;
vlsm = clib_mem_alloc (sizeof (vls_main_t));
clib_memset (vlsm, 0, sizeof (*vlsm));
clib_rwlock_init (&vlsm->vls_table_lock);
clib_rwlock_init (&vlsm->shared_data_lock);
pool_alloc (vlsm->workers, vcm->cfg.max_workers);
pthread_atfork (vls_app_pre_fork, vls_app_fork_parent_handler,
vls_app_fork_child_handler);
atexit (vls_app_exit);
vls_worker_alloc ();
vlsl->vls_wrk_index = vcl_get_worker_index ();
vls_mt_locks_init ();
vcm->wrk_rpc_fn = vls_rpc_handler;
return VPPCOM_OK;
}
unsigned char
vls_use_eventfd (void)
{
return vcm->cfg.use_mq_eventfd;
}
unsigned char
vls_mt_wrk_supported (void)
{
return vcm->cfg.mt_wrk_supported;
}
int
vls_use_real_epoll (void)
{
if (vcl_get_worker_index () == ~0)
return 0;
return vcl_worker_get_current ()->vcl_needs_real_epoll;
}
void
vls_register_vcl_worker (void)
{
if (vppcom_worker_register () != VPPCOM_OK)
{
VERR ("failed to register worker");
return;
}
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/