#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 *workers_subscribed;
- clib_bitmap_t *listeners;
+ 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_index_to_vlsh_table;
+ u32 wrk_index;
+} vls_worker_t;
+
typedef struct vls_local_
{
int vls_wrk_index;
typedef struct vls_main_
{
- vcl_locked_session_t *vls_pool;
+ vls_worker_t *workers;
clib_rwlock_t vls_table_lock;
- uword *session_index_to_vlsh_table;
+ /** 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_table_rlock (void)
+vls_shared_data_pool_rlock (void)
{
- clib_rwlock_reader_lock (&vlsm->vls_table_lock);
+ clib_rwlock_reader_lock (&vlsm->shared_data_lock);
}
static inline void
-vls_table_runlock (void)
+vls_shared_data_pool_runlock (void)
{
- clib_rwlock_reader_unlock (&vlsm->vls_table_lock);
+ clib_rwlock_reader_unlock (&vlsm->shared_data_lock);
}
static inline void
-vls_table_wlock (void)
+vls_mt_table_rlock (void)
{
- clib_rwlock_writer_lock (&vlsm->vls_table_lock);
+ if (vlsl->vls_mt_n_threads > 1)
+ clib_rwlock_reader_lock (&vlsm->vls_table_lock);
}
static inline void
-vls_table_wunlock (void)
+vls_mt_table_runlock (void)
{
- clib_rwlock_writer_unlock (&vlsm->vls_table_lock);
+ 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_add (void)
{
vlsl->vls_mt_n_threads += 1;
- vcl_set_worker_index (vlsl->vls_wrk_index);
+
+ /* 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
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)
{
{
vcl_session_handle_t sh;
sh = vls_to_sh (vls);
- vls_table_runlock ();
+ 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_index_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_table_wlock ();
- pool_get (vlsm->vls_pool, 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 - vlsm->vls_pool;
- hash_set (vlsm->session_index_to_vlsh_table, vls->session_index,
+ vls->vls_index = vls - wrk->vls_pool;
+ vls->shared_data_index = ~0;
+ hash_set (wrk->session_index_to_vlsh_table, vls->session_index,
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_table_wunlock ();
+
+ vls_mt_table_wunlock ();
return vls->vls_index;
}
static vcl_locked_session_t *
vls_get (vls_handle_t vlsh)
{
- if (pool_is_free_index (vlsm->vls_pool, 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 (vlsm->vls_pool, vlsh);
+ 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 (vlsm->session_index_to_vlsh_table, vls->session_index);
+ hash_unset (wrk->session_index_to_vlsh_table, vls->session_index);
clib_spinlock_free (&vls->lock);
- pool_put (vlsm->vls_pool, vls);
+ 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 (vlsm->vls_pool, vlsh))
+ if (pool_is_free_index (wrk->vls_pool, vlsh))
return 0;
- vls = pool_elt_at_index (vlsm->vls_pool, vlsh);
- clib_spinlock_lock (&vls->lock);
+ vls = pool_elt_at_index (wrk->vls_pool, vlsh);
+ vls_lock (vls);
return vls;
}
vls_get_w_dlock (vls_handle_t vlsh)
{
vcl_locked_session_t *vls;
- vls_table_rlock ();
+ vls_mt_table_rlock ();
vls = vls_get_and_lock (vlsh);
if (!vls)
- vls_table_runlock ();
+ vls_mt_table_runlock ();
return vls;
}
-static inline void
-vls_lock (vcl_locked_session_t * vls)
-{
- clib_spinlock_lock (&vls->lock);
-}
-
-static inline void
-vls_unlock (vcl_locked_session_t * vls)
-{
- clib_spinlock_unlock (&vls->lock);
-}
-
static inline void
vls_get_and_unlock (vls_handle_t vlsh)
{
vcl_locked_session_t *vls;
- vls_table_rlock ();
+ vls_mt_table_rlock ();
vls = vls_get (vlsh);
vls_unlock (vls);
- vls_table_runlock ();
+ vls_mt_table_runlock ();
}
static inline void
vls_dunlock (vcl_locked_session_t * vls)
{
vls_unlock (vls);
- vls_table_runlock ();
+ 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
vls_handle_t
vls_si_to_vlsh (u32 session_index)
{
+ vls_worker_t *wrk = vls_worker_get_current ();
uword *vlshp;
- vlshp = hash_get (vlsm->session_index_to_vlsh_table, session_index);
+ vlshp = hash_get (wrk->session_index_to_vlsh_table, session_index);
return vlshp ? *vlshp : VLS_INVALID_HANDLE;
}
{
vls_handle_t vlsh;
- vls_table_rlock ();
+ vls_mt_table_rlock ();
vlsh = vls_si_to_vlsh (session_index);
- vls_table_runlock ();
+ vls_mt_table_runlock ();
return vlsh;
}
-u8
-vls_is_shared (vcl_locked_session_t * vls)
-{
- return vec_len (vls->workers_subscribed);
-}
-
u8
vls_is_shared_by_wrk (vcl_locked_session_t * vls, u32 wrk_index)
{
+ vls_shared_data_t *vls_shd;
int i;
- for (i = 0; i < vec_len (vls->workers_subscribed); i++)
- if (vls->workers_subscribed[i] == wrk_index)
- return 1;
+
+ 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)
{
- clib_bitmap_set (vls->listeners, wrk_index, 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)
{
- return (clib_bitmap_get (vls->listeners, wrk_index) == 1);
+ 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
s = vcl_session_get (wrk, vls->session_index);
if (s->session_state != STATE_LISTEN)
return;
- vppcom_send_unbind_sock (wrk, s->vpp_handle);
+ vcl_send_session_unlisten (wrk, s);
s->session_state = 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)
{
- int i, do_disconnect;
+ 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 == STATE_LISTEN)
vls_listener_wrk_set (vls, wrk->wrk_index, 0 /* is_active */ );
- for (i = 0; i < vec_len (vls->workers_subscribed); i++)
- {
- if (vls->workers_subscribed[i] != wrk->wrk_index)
- continue;
+ vls_shared_data_pool_rlock ();
- 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->workers_subscribed, i);
- do_disconnect = s->session_state == STATE_LISTEN;
- vcl_session_cleanup (wrk, s, vcl_session_handle (s), do_disconnect);
- return 0;
- }
+ vls_shd = vls_shared_data_get (vls->shared_data_index);
+ clib_spinlock_lock (&vls_shd->lock);
- /* Return, if this is not the owning worker */
- if (vls->worker_index != wrk->wrk_index)
- return 0;
+ 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;
+ }
- /* Check if we can change owner or close */
- if (vec_len (vls->workers_subscribed))
+ /*
+ * Unsubscribe from share data and fifos
+ */
+ if (s->rx_fifo)
{
- vls->worker_index = vls->workers_subscribed[0];
- vec_del1 (vls->workers_subscribed, 0);
- vcl_send_session_worker_update (wrk, s, vls->worker_index);
- if (vec_len (vls->workers_subscribed))
- clib_warning ("more workers need to be updated");
+ svm_fifo_del_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
+ svm_fifo_del_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
}
- else
+ vec_del1 (vls_shd->workers_subscribed, pos);
+
+ /*
+ * Cleanup vcl state
+ */
+ n_subscribers = vec_len (vls_shd->workers_subscribed);
+ do_disconnect = s->session_state == STATE_LISTEN || !n_subscribers;
+ vcl_session_cleanup (wrk, s, vcl_session_handle (s), do_disconnect);
+
+ /*
+ * No subscriber left, cleanup shared data
+ */
+ if (!n_subscribers)
{
- vcl_session_cleanup (wrk, s, vcl_session_handle (s),
- 1 /* do_disconnect */ );
+ 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_share_vcl_session (vcl_worker_t * wrk, vcl_session_t * s)
+vls_init_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
{
- 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 ();
- vls = vls_get (vls_si_to_vlsh (s->session_index));
- if (!vls)
- return;
- vls_lock (vls);
- vec_add1 (vls->workers_subscribed, wrk->wrk_index);
if (s->rx_fifo)
{
- svm_fifo_add_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
- svm_fifo_add_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
+ 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 == STATE_LISTEN)
{
s->session_state = STATE_LISTEN_NO_MQ;
}
+}
- vls_unlock (vls);
+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 ();
- vcl_session_t *s;
+ /*
+ * 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);
- vls_table_rlock ();
- /* *INDENT-OFF* */
- pool_foreach (s, wrk->sessions, ({
- vls_share_vcl_session (wrk, s);
- }));
- /* *INDENT-ON* */
+ /*
+ * init vls worker
+ */
+ vls_parent_wrk = vls_worker_get (parent_wrk->wrk_index);
+ vls_wrk->session_index_to_vlsh_table =
+ hash_dup (vls_parent_wrk->session_index_to_vlsh_table);
+ vls_wrk->vls_pool = pool_dup (vls_parent_wrk->vls_pool);
- vls_table_runlock ();
+ vls_share_sessions (vls_parent_wrk, vls_wrk);
}
static void
vls_mt_create_unlock ();
}
-#define vls_mt_guard(_vls, _op) \
- int _locks_acq = 0; \
- if (PREDICT_FALSE (vcl_get_worker_index () == ~0)) \
- vls_mt_add (); \
- if (PREDICT_FALSE (vlsl->vls_mt_n_threads > 1)) \
- vls_mt_acq_locks (_vls, _op, &_locks_acq); \
+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 != 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_unguard() \
- if (PREDICT_FALSE (_locks_acq)) \
+#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
vcl_locked_session_t *vls;
int rv;
+ vls_mt_detect ();
if (!(vls = vls_get_w_dlock (vlsh)))
return VPPCOM_EBADFD;
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);
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);
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);
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);
vcl_locked_session_t *vls;
int rv;
- if (PREDICT_FALSE (vcl_get_worker_index () == ~0))
- vls_mt_add ();
-
+ 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;
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);
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);
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);
{
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 STATE_LISTEN:
if (is_add)
{
- if (vls->worker_index == wrk->wrk_index)
- vls_listener_wrk_set (vls, wrk->wrk_index, 1 /* is_active */ );
+ vls_listener_wrk_set (vls, vls->worker_index, 1 /* is_active */ );
break;
}
vls_listener_wrk_stop_listen (vls, vls->worker_index);
* 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. */
- if (!vls_listener_wrk_is_active (vls, vls->worker_index))
- vls_listener_wrk_stop_listen (vls, vls->worker_index);
+ 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;
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)
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 ();
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_table_wlock ();
+ vls_mt_detect ();
+ vls_mt_table_wlock ();
vls = vls_get_and_lock (vlsh);
if (!vls)
{
- vls_table_wunlock ();
+ vls_mt_table_wunlock ();
return VPPCOM_EBADFD;
}
- vls_mt_guard (0, VLS_MT_OP_SPOOL);
+ vls_mt_guard (vls, VLS_MT_OP_SPOOL);
+
if (vls_is_shared (vls))
- {
- /* At least two workers share the session so vls won't be freed */
- vls_unshare_session (vls, vcl_worker_get_current ());
- vls_unlock (vls);
- vls_mt_unguard ();
- vls_table_wunlock ();
- return VPPCOM_OK;
- }
+ 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);
- rv = vppcom_session_close (vls_to_sh (vls));
vls_free (vls);
vls_mt_unguard ();
- vls_table_wunlock ();
+ vls_mt_table_wunlock ();
return rv;
}
vcl_session_handle_t sh;
vls_handle_t vlsh;
- if (PREDICT_FALSE (vcl_get_worker_index () == ~0))
- vls_mt_add ();
+ vls_mt_detect ();
sh = vppcom_epoll_create ();
if (sh == INVALID_SESSION_ID)
vcl_session_handle_t ep_sh, sh;
int rv;
- vls_table_rlock ();
+ 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_table_runlock ();
+ vls_mt_table_runlock ();
rv = vppcom_epoll_ctl (ep_sh, op, sh, event);
- vls_table_rlock ();
+ vls_mt_table_rlock ();
ep_vls = vls_get (ep_vlsh);
vls = vls_get (vlsh);
vls_unlock (vls);
vls_unlock (ep_vls);
- vls_table_runlock ();
+ vls_mt_table_runlock ();
return rv;
}
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);
{
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);
current_wrk = vcl_get_worker_index ();
is_current = current_wrk == wrk->wrk_index;
- vls_table_wlock ();
/* *INDENT-OFF* */
pool_foreach (s, wrk->sessions, ({
vls_unshare_session (vls, wrk);
}));
/* *INDENT-ON* */
-
- vls_table_wunlock ();
}
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
parent_wrk_index);
/*
- * Allocate worker
+ * Allocate worker vcl
*/
vcl_set_worker_index (~0);
if (!vcl_worker_alloc_and_init ())
return;
}
+ /*
+ * Allocate/initialize vls worker
+ */
+ vls_worker_alloc ();
+
/*
* Register worker with vpp and share sessions
*/
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
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
*
Code Review / vpp.git / blobdiff