#include <vnet/session/application_local.h>
#include <vnet/session/session.h>
-local_session_t *
-application_local_listen_session_alloc (application_t * app)
+typedef enum ct_segment_flags_
{
- local_session_t *ll;
- pool_get_zero (app->local_listen_sessions, ll);
- ll->session_index = ll - app->local_listen_sessions;
- ll->session_type = session_type_from_proto_and_ip (TRANSPORT_PROTO_NONE, 0);
- ll->app_index = app->app_index;
- ll->session_state = SESSION_STATE_LISTENING;
- return ll;
-}
+ CT_SEGMENT_F_CLIENT_DETACHED = 1 << 0,
+ CT_SEGMENT_F_SERVER_DETACHED = 1 << 1,
+} ct_segment_flags_t;
-void
-application_local_listen_session_free (application_t * app,
- local_session_t * ll)
+typedef struct ct_segment_
{
- pool_put (app->local_listen_sessions, ll);
- if (CLIB_DEBUG)
- clib_memset (ll, 0xfb, sizeof (*ll));
+ u32 client_n_sessions;
+ u32 server_n_sessions;
+ u32 seg_ctx_index;
+ u32 ct_seg_index;
+ u32 segment_index;
+ ct_segment_flags_t flags;
+} ct_segment_t;
+
+typedef struct ct_segments_
+{
+ u32 sm_index;
+ u32 server_wrk;
+ u32 client_wrk;
+ u32 fifo_pair_bytes;
+ ct_segment_t *segments;
+} ct_segments_ctx_t;
+
+typedef struct ct_cleanup_req_
+{
+ u32 ct_index;
+} ct_cleanup_req_t;
+
+typedef struct ct_worker_
+{
+ ct_connection_t *connections; /**< Per-worker connection pools */
+ u32 *pending_connects; /**< Fifo of pending ho indices */
+ ct_cleanup_req_t *pending_cleanups; /**< Fifo of pending indices */
+ u8 have_connects; /**< Set if connect rpc pending */
+ u8 have_cleanups; /**< Set if cleanup rpc pending */
+ clib_spinlock_t pending_connects_lock; /**< Lock for pending connects */
+ u32 *new_connects; /**< Burst of connects to be done */
+} ct_worker_t;
+
+typedef struct ct_main_
+{
+ ct_worker_t *wrk; /**< Per-worker state */
+ u32 n_workers; /**< Number of vpp workers */
+ u32 n_sessions; /**< Cumulative sessions counter */
+ u32 *ho_reusable; /**< Vector of reusable ho indices */
+ clib_spinlock_t ho_reuseable_lock; /**< Lock for reusable ho indices */
+ clib_rwlock_t app_segs_lock; /**< RW lock for seg contexts */
+ uword *app_segs_ctxs_table; /**< App handle to segment pool map */
+ ct_segments_ctx_t *app_seg_ctxs; /**< Pool of ct segment contexts */
+ u32 **fwrk_pending_connects; /**< First wrk pending half-opens */
+ u32 fwrk_thread; /**< First worker thread */
+ u8 fwrk_have_flush; /**< Flag for connect flush rpc */
+} ct_main_t;
+
+static ct_main_t ct_main;
+
+static inline ct_worker_t *
+ct_worker_get (u32 thread_index)
+{
+ return &ct_main.wrk[thread_index];
}
-void
-application_local_listener_session_endpoint (local_session_t * ll,
- session_endpoint_t * sep)
+static ct_connection_t *
+ct_connection_alloc (u32 thread_index)
{
- sep->transport_proto =
- session_type_transport_proto (ll->listener_session_type);
- sep->port = ll->port;
- sep->is_ip4 = ll->listener_session_type & 1;
+ ct_worker_t *wrk = ct_worker_get (thread_index);
+ ct_connection_t *ct;
+
+ pool_get_aligned_safe (wrk->connections, ct, CLIB_CACHE_LINE_BYTES);
+ clib_memset (ct, 0, sizeof (*ct));
+ ct->c_c_index = ct - wrk->connections;
+ ct->c_thread_index = thread_index;
+ ct->client_wrk = ~0;
+ ct->server_wrk = ~0;
+ ct->seg_ctx_index = ~0;
+ ct->ct_seg_index = ~0;
+ return ct;
}
-local_session_t *
-app_worker_local_session_alloc (app_worker_t * app_wrk)
+static ct_connection_t *
+ct_connection_get (u32 ct_index, u32 thread_index)
{
- local_session_t *s;
- pool_get (app_wrk->local_sessions, s);
- clib_memset (s, 0, sizeof (*s));
- s->app_wrk_index = app_wrk->wrk_index;
- s->session_index = s - app_wrk->local_sessions;
- s->session_type = session_type_from_proto_and_ip (TRANSPORT_PROTO_NONE, 0);
- return s;
+ ct_worker_t *wrk = ct_worker_get (thread_index);
+
+ if (pool_is_free_index (wrk->connections, ct_index))
+ return 0;
+ return pool_elt_at_index (wrk->connections, ct_index);
}
-void
-app_worker_local_session_free (app_worker_t * app_wrk, local_session_t * s)
+static void
+ct_connection_free (ct_connection_t * ct)
{
- pool_put (app_wrk->local_sessions, s);
+ ct_worker_t *wrk = ct_worker_get (ct->c_thread_index);
+
if (CLIB_DEBUG)
- clib_memset (s, 0xfc, sizeof (*s));
+ {
+ clib_memset (ct, 0xfc, sizeof (*ct));
+ pool_put (wrk->connections, ct);
+ return;
+ }
+ pool_put (wrk->connections, ct);
}
-local_session_t *
-app_worker_get_local_session (app_worker_t * app_wrk, u32 session_index)
+static ct_connection_t *
+ct_half_open_alloc (void)
{
- if (pool_is_free_index (app_wrk->local_sessions, session_index))
- return 0;
- return pool_elt_at_index (app_wrk->local_sessions, session_index);
+ ct_main_t *cm = &ct_main;
+ u32 *hip;
+
+ clib_spinlock_lock (&cm->ho_reuseable_lock);
+ vec_foreach (hip, cm->ho_reusable)
+ pool_put_index (cm->wrk[cm->fwrk_thread].connections, *hip);
+ vec_reset_length (cm->ho_reusable);
+ clib_spinlock_unlock (&cm->ho_reuseable_lock);
+
+ return ct_connection_alloc (cm->fwrk_thread);
}
-local_session_t *
-app_worker_get_local_session_from_handle (session_handle_t handle)
+static ct_connection_t *
+ct_half_open_get (u32 ho_index)
{
- app_worker_t *server_wrk;
- u32 session_index, server_wrk_index;
- local_session_parse_handle (handle, &server_wrk_index, &session_index);
- server_wrk = app_worker_get_if_valid (server_wrk_index);
- if (!server_wrk)
- return 0;
- return app_worker_get_local_session (server_wrk, session_index);
+ ct_main_t *cm = &ct_main;
+ return ct_connection_get (ho_index, cm->fwrk_thread);
}
-static inline u64
-application_client_local_connect_key (local_session_t * ls)
+void
+ct_half_open_add_reusable (u32 ho_index)
{
- return (((u64) ls->app_wrk_index) << 32 | (u64) ls->session_index);
+ ct_main_t *cm = &ct_main;
+
+ clib_spinlock_lock (&cm->ho_reuseable_lock);
+ vec_add1 (cm->ho_reusable, ho_index);
+ clib_spinlock_unlock (&cm->ho_reuseable_lock);
}
-static inline void
-application_client_local_connect_key_parse (u64 key, u32 * app_wrk_index,
- u32 * session_index)
+session_t *
+ct_session_get_peer (session_t * s)
{
- *app_wrk_index = key >> 32;
- *session_index = key & 0xFFFFFFFF;
+ ct_connection_t *ct, *peer_ct;
+ ct = ct_connection_get (s->connection_index, s->thread_index);
+ peer_ct = ct_connection_get (ct->peer_index, s->thread_index);
+ return session_get (peer_ct->c_s_index, s->thread_index);
}
void
-app_worker_local_sessions_free (app_worker_t * app_wrk)
+ct_session_endpoint (session_t * ll, session_endpoint_t * sep)
{
- u32 index, server_wrk_index, session_index;
- u64 handle, *handles = 0;
- app_worker_t *server_wrk;
+ ct_connection_t *ct;
+ ct = (ct_connection_t *) session_get_transport (ll);
+ sep->transport_proto = ct->actual_tp;
+ sep->port = ct->c_lcl_port;
+ sep->is_ip4 = ct->c_is_ip4;
+ ip_copy (&sep->ip, &ct->c_lcl_ip, ct->c_is_ip4);
+}
+
+static void
+ct_set_invalid_app_wrk (ct_connection_t *ct, u8 is_client)
+{
+ ct_connection_t *peer_ct;
+
+ peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
+
+ if (is_client)
+ {
+ ct->client_wrk = APP_INVALID_INDEX;
+ if (peer_ct)
+ ct->client_wrk = APP_INVALID_INDEX;
+ }
+ else
+ {
+ ct->server_wrk = APP_INVALID_INDEX;
+ if (peer_ct)
+ ct->server_wrk = APP_INVALID_INDEX;
+ }
+}
+
+static void
+ct_session_dealloc_fifos (ct_connection_t *ct, svm_fifo_t *rx_fifo,
+ svm_fifo_t *tx_fifo)
+{
+ ct_segments_ctx_t *seg_ctx;
+ ct_main_t *cm = &ct_main;
segment_manager_t *sm;
- local_session_t *ls;
- int i;
+ app_worker_t *app_wrk;
+ ct_segment_t *ct_seg;
+ fifo_segment_t *fs;
+ u32 seg_index;
+ session_t *s;
+ int cnt;
+
+ /*
+ * Cleanup fifos
+ */
+
+ sm = segment_manager_get (rx_fifo->segment_manager);
+ seg_index = rx_fifo->segment_index;
+
+ fs = segment_manager_get_segment_w_lock (sm, seg_index);
+ fifo_segment_free_fifo (fs, rx_fifo);
+ fifo_segment_free_fifo (fs, tx_fifo);
+ segment_manager_segment_reader_unlock (sm);
/*
- * Local sessions
+ * Atomically update segment context with readers lock
*/
- if (app_wrk->local_sessions)
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
+
+ if (ct->flags & CT_CONN_F_CLIENT)
+ {
+ cnt =
+ __atomic_sub_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
+ }
+ else
{
- /* *INDENT-OFF* */
- pool_foreach (ls, app_wrk->local_sessions, ({
- app_worker_local_session_disconnect (app_wrk->wrk_index, ls);
- }));
- /* *INDENT-ON* */
+ cnt =
+ __atomic_sub_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
}
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
/*
- * Local connects
+ * No need to do any app updates, return
*/
- vec_reset_length (handles);
- /* *INDENT-OFF* */
- hash_foreach (handle, index, app_wrk->local_connects, ({
- vec_add1 (handles, handle);
- }));
- /* *INDENT-ON* */
-
- for (i = 0; i < vec_len (handles); i++)
- {
- application_client_local_connect_key_parse (handles[i],
- &server_wrk_index,
- &session_index);
- server_wrk = app_worker_get_if_valid (server_wrk_index);
- if (server_wrk)
- {
- ls = app_worker_get_local_session (server_wrk, session_index);
- app_worker_local_session_disconnect (app_wrk->wrk_index, ls);
- }
+ ASSERT (cnt >= 0);
+ if (cnt)
+ return;
+
+ /*
+ * Grab exclusive lock and update flags unless some other thread
+ * added more sessions
+ */
+ clib_rwlock_writer_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
+ if (ct->flags & CT_CONN_F_CLIENT)
+ {
+ cnt = ct_seg->client_n_sessions;
+ if (cnt)
+ goto done;
+ ct_seg->flags |= CT_SEGMENT_F_CLIENT_DETACHED;
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+ if (s->app_wrk_index == APP_INVALID_INDEX)
+ ct_set_invalid_app_wrk (ct, 1 /* is_client */);
}
+ else
+ {
+ cnt = ct_seg->server_n_sessions;
+ if (cnt)
+ goto done;
+ ct_seg->flags |= CT_SEGMENT_F_SERVER_DETACHED;
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+ if (s->app_wrk_index == APP_INVALID_INDEX)
+ ct_set_invalid_app_wrk (ct, 0 /* is_client */);
+ }
+
+ if (!(ct_seg->flags & CT_SEGMENT_F_CLIENT_DETACHED) ||
+ !(ct_seg->flags & CT_SEGMENT_F_SERVER_DETACHED))
+ goto done;
- sm = segment_manager_get (app_wrk->local_segment_manager);
- sm->app_wrk_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
- segment_manager_del (sm);
+ /*
+ * Remove segment context because both client and server detached
+ */
+
+ pool_put_index (seg_ctx->segments, ct->ct_seg_index);
+
+ /*
+ * No more segment indices left, remove the segments context
+ */
+ if (!pool_elts (seg_ctx->segments))
+ {
+ u64 table_handle = seg_ctx->client_wrk << 16 | seg_ctx->server_wrk;
+ table_handle = (u64) seg_ctx->sm_index << 32 | table_handle;
+ hash_unset (cm->app_segs_ctxs_table, table_handle);
+ pool_free (seg_ctx->segments);
+ pool_put_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ }
+
+ /*
+ * Segment to be removed so notify both apps
+ */
+
+ app_wrk = app_worker_get_if_valid (ct->client_wrk);
+ /* Determine if client app still needs notification, i.e., if it is
+ * still attached. If client detached and this is the last ct session
+ * on this segment, then its connects segment manager should also be
+ * detached, so do not send notification */
+ if (app_wrk)
+ {
+ segment_manager_t *csm;
+ csm = app_worker_get_connect_segment_manager (app_wrk);
+ if (!segment_manager_app_detached (csm))
+ app_worker_del_segment_notify (app_wrk, ct->segment_handle);
+ }
+
+ /* Notify server app and free segment */
+ segment_manager_lock_and_del_segment (sm, seg_index);
+
+ /* Cleanup segment manager if needed. If server detaches there's a chance
+ * the client's sessions will hold up segment removal */
+ if (segment_manager_app_detached (sm) && !segment_manager_has_fifos (sm))
+ segment_manager_free_safe (sm);
+
+done:
+
+ clib_rwlock_writer_unlock (&cm->app_segs_lock);
+}
+
+static void
+ct_session_force_disconnect_server (ct_connection_t *sct)
+{
+ sct->peer_index = ~0;
+ session_transport_closing_notify (&sct->connection);
}
int
-app_worker_local_session_cleanup (app_worker_t * client_wrk,
- app_worker_t * server_wrk,
- local_session_t * ls)
+ct_session_connect_notify (session_t *ss, session_error_t err)
{
- svm_fifo_segment_private_t *seg;
- session_t *listener;
- segment_manager_t *sm;
- u64 client_key;
- u8 has_transport;
-
- /* Retrieve listener transport type as it is the one that decides where
- * the fifos are allocated */
- has_transport = application_local_session_listener_has_transport (ls);
- if (!has_transport)
- sm = app_worker_get_local_segment_manager_w_session (server_wrk, ls);
- else
+ u32 ss_index, opaque, thread_index;
+ ct_connection_t *sct, *cct;
+ app_worker_t *client_wrk;
+ session_t *cs;
+
+ ss_index = ss->session_index;
+ thread_index = ss->thread_index;
+ sct = (ct_connection_t *) session_get_transport (ss);
+ client_wrk = app_worker_get (sct->client_wrk);
+ opaque = sct->client_opaque;
+
+ cct = ct_connection_get (sct->peer_index, thread_index);
+
+ /* Client closed while waiting for reply from server */
+ if (PREDICT_FALSE (!cct))
+ {
+ ct_session_force_disconnect_server (sct);
+ return 0;
+ }
+
+ session_half_open_delete_notify (&cct->connection);
+ cct->flags &= ~CT_CONN_F_HALF_OPEN;
+
+ if (PREDICT_FALSE (err))
+ goto connect_error;
+
+ /*
+ * Alloc client session, server session assumed to be established
+ */
+
+ ASSERT (ss->session_state >= SESSION_STATE_READY);
+
+ cs = session_alloc (thread_index);
+ ss = session_get (ss_index, thread_index);
+ cs->session_type = ss->session_type;
+ cs->listener_handle = SESSION_INVALID_HANDLE;
+ session_set_state (cs, SESSION_STATE_CONNECTING);
+ cs->app_wrk_index = client_wrk->wrk_index;
+ cs->connection_index = cct->c_c_index;
+ cct->c_s_index = cs->session_index;
+
+ /* This will allocate fifos for the session. They won't be used for
+ * exchanging data but they will be used to close the connection if
+ * the segment manager/worker is freed */
+ if ((err = app_worker_init_connected (client_wrk, cs)))
{
- listener = listen_session_get (ls->listener_index);
- sm = app_worker_get_listen_segment_manager (server_wrk, listener);
+ session_free (cs);
+ ct_session_force_disconnect_server (sct);
+ err = SESSION_E_ALLOC;
+ goto connect_error;
}
- seg = segment_manager_get_segment (sm, ls->svm_segment_index);
- if (client_wrk)
+ session_set_state (cs, SESSION_STATE_CONNECTING);
+
+ if (app_worker_connect_notify (client_wrk, cs, 0, opaque))
{
- client_key = application_client_local_connect_key (ls);
- hash_unset (client_wrk->local_connects, client_key);
+ segment_manager_dealloc_fifos (cs->rx_fifo, cs->tx_fifo);
+ session_free (cs);
+ ct_session_force_disconnect_server (sct);
+ goto cleanup_client;
}
- if (!has_transport)
+ cs = session_get (cct->c_s_index, cct->c_thread_index);
+ session_set_state (cs, SESSION_STATE_READY);
+
+ return 0;
+
+connect_error:
+
+ app_worker_connect_notify (client_wrk, 0, err, cct->client_opaque);
+
+cleanup_client:
+
+ if (cct->client_rx_fifo)
+ ct_session_dealloc_fifos (cct, cct->client_rx_fifo, cct->client_tx_fifo);
+ ct_connection_free (cct);
+ return -1;
+}
+
+static inline ct_segment_t *
+ct_lookup_free_segment (ct_main_t *cm, segment_manager_t *sm,
+ u32 seg_ctx_index)
+{
+ uword free_bytes, max_free_bytes;
+ ct_segment_t *ct_seg, *res = 0;
+ ct_segments_ctx_t *seg_ctx;
+ fifo_segment_t *fs;
+ u32 max_fifos;
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
+ max_free_bytes = seg_ctx->fifo_pair_bytes;
+
+ pool_foreach (ct_seg, seg_ctx->segments)
{
- application_t *server = application_get (server_wrk->app_index);
- u64 segment_handle = segment_manager_segment_handle (sm, seg);
- server->cb_fns.del_segment_callback (server_wrk->api_client_index,
- segment_handle);
- if (client_wrk)
+ /* Client or server has detached so segment cannot be used */
+ fs = segment_manager_get_segment (sm, ct_seg->segment_index);
+ free_bytes = fifo_segment_available_bytes (fs);
+ max_fifos = fifo_segment_size (fs) / seg_ctx->fifo_pair_bytes;
+ if (free_bytes > max_free_bytes &&
+ fifo_segment_num_fifos (fs) / 2 < max_fifos)
{
- application_t *client = application_get (client_wrk->app_index);
- client->cb_fns.del_segment_callback (client_wrk->api_client_index,
- segment_handle);
+ max_free_bytes = free_bytes;
+ res = ct_seg;
}
- segment_manager_del_segment (sm, seg);
}
- app_worker_local_session_free (server_wrk, ls);
+ return res;
+}
+static ct_segment_t *
+ct_alloc_segment (ct_main_t *cm, app_worker_t *server_wrk, u64 table_handle,
+ segment_manager_t *sm, u32 client_wrk_index)
+{
+ u32 seg_ctx_index = ~0, sm_index, pair_bytes;
+ segment_manager_props_t *props;
+ const u32 margin = 16 << 10;
+ ct_segments_ctx_t *seg_ctx;
+ app_worker_t *client_wrk;
+ u64 seg_size, seg_handle;
+ application_t *server;
+ ct_segment_t *ct_seg;
+ uword *spp;
+ int fs_index;
+
+ server = application_get (server_wrk->app_index);
+ props = application_segment_manager_properties (server);
+ sm_index = segment_manager_index (sm);
+ pair_bytes = props->rx_fifo_size + props->tx_fifo_size + margin;
+
+ /*
+ * Make sure another thread did not alloc a segment while acquiring the lock
+ */
+
+ spp = hash_get (cm->app_segs_ctxs_table, table_handle);
+ if (spp)
+ {
+ seg_ctx_index = *spp;
+ ct_seg = ct_lookup_free_segment (cm, sm, seg_ctx_index);
+ if (ct_seg)
+ return ct_seg;
+ }
+
+ /*
+ * No segment, try to alloc one and notify the server and the client.
+ * Make sure the segment is not used for other fifos
+ */
+ seg_size = clib_max (props->segment_size, 128 << 20);
+ fs_index =
+ segment_manager_add_segment2 (sm, seg_size, FIFO_SEGMENT_F_CUSTOM_USE);
+ if (fs_index < 0)
+ return 0;
+
+ if (seg_ctx_index == ~0)
+ {
+ pool_get_zero (cm->app_seg_ctxs, seg_ctx);
+ seg_ctx_index = seg_ctx - cm->app_seg_ctxs;
+ hash_set (cm->app_segs_ctxs_table, table_handle, seg_ctx_index);
+ seg_ctx->server_wrk = server_wrk->wrk_index;
+ seg_ctx->client_wrk = client_wrk_index;
+ seg_ctx->sm_index = sm_index;
+ seg_ctx->fifo_pair_bytes = pair_bytes;
+ }
+ else
+ {
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
+ }
+
+ pool_get_zero (seg_ctx->segments, ct_seg);
+ ct_seg->segment_index = fs_index;
+ ct_seg->server_n_sessions = 0;
+ ct_seg->client_n_sessions = 0;
+ ct_seg->ct_seg_index = ct_seg - seg_ctx->segments;
+ ct_seg->seg_ctx_index = seg_ctx_index;
+
+ /* New segment, notify the server and client */
+ seg_handle = segment_manager_make_segment_handle (sm_index, fs_index);
+ if (app_worker_add_segment_notify (server_wrk, seg_handle))
+ goto error;
+
+ client_wrk = app_worker_get (client_wrk_index);
+ if (app_worker_add_segment_notify (client_wrk, seg_handle))
+ {
+ app_worker_del_segment_notify (server_wrk, seg_handle);
+ goto error;
+ }
+
+ return ct_seg;
+
+error:
+
+ segment_manager_lock_and_del_segment (sm, fs_index);
+ pool_put_index (seg_ctx->segments, ct_seg->seg_ctx_index);
return 0;
}
-int
-app_worker_local_session_connect_notify (local_session_t * ls)
+static int
+ct_init_accepted_session (app_worker_t *server_wrk, ct_connection_t *ct,
+ session_t *ls, session_t *ll)
{
- svm_fifo_segment_private_t *seg;
- app_worker_t *client_wrk, *server_wrk;
+ segment_manager_props_t *props;
+ u64 seg_handle, table_handle;
+ u32 sm_index, fs_index = ~0;
+ ct_segments_ctx_t *seg_ctx;
+ ct_main_t *cm = &ct_main;
+ application_t *server;
segment_manager_t *sm;
- application_t *client;
- int rv, is_fail = 0;
- u64 segment_handle;
- u64 client_key;
-
- client_wrk = app_worker_get (ls->client_wrk_index);
- server_wrk = app_worker_get (ls->app_wrk_index);
- client = application_get (client_wrk->app_index);
-
- sm = app_worker_get_local_segment_manager_w_session (server_wrk, ls);
- seg = segment_manager_get_segment_w_lock (sm, ls->svm_segment_index);
- segment_handle = segment_manager_segment_handle (sm, seg);
- if ((rv = client->cb_fns.add_segment_callback (client_wrk->api_client_index,
- segment_handle)))
- {
- clib_warning ("failed to notify client %u of new segment",
- ls->client_wrk_index);
- segment_manager_segment_reader_unlock (sm);
- app_worker_local_session_disconnect (ls->client_wrk_index, ls);
- is_fail = 1;
+ ct_segment_t *ct_seg;
+ fifo_segment_t *fs;
+ uword *spp;
+ int rv;
+
+ sm = app_worker_get_listen_segment_manager (server_wrk, ll);
+ sm_index = segment_manager_index (sm);
+ server = application_get (server_wrk->app_index);
+ props = application_segment_manager_properties (server);
+
+ table_handle = ct->client_wrk << 16 | server_wrk->wrk_index;
+ table_handle = (u64) sm_index << 32 | table_handle;
+
+ /*
+ * Check if we already have a segment that can hold the fifos
+ */
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ spp = hash_get (cm->app_segs_ctxs_table, table_handle);
+ if (spp)
+ {
+ ct_seg = ct_lookup_free_segment (cm, sm, *spp);
+ if (ct_seg)
+ {
+ ct->seg_ctx_index = ct_seg->seg_ctx_index;
+ ct->ct_seg_index = ct_seg->ct_seg_index;
+ fs_index = ct_seg->segment_index;
+ ct_seg->flags &=
+ ~(CT_SEGMENT_F_SERVER_DETACHED | CT_SEGMENT_F_CLIENT_DETACHED);
+ __atomic_add_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
+ __atomic_add_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
+ }
}
- else
+
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
+ /*
+ * If not, grab exclusive lock and allocate segment
+ */
+ if (fs_index == ~0)
+ {
+ clib_rwlock_writer_lock (&cm->app_segs_lock);
+
+ ct_seg =
+ ct_alloc_segment (cm, server_wrk, table_handle, sm, ct->client_wrk);
+ if (!ct_seg)
+ {
+ clib_rwlock_writer_unlock (&cm->app_segs_lock);
+ return -1;
+ }
+
+ ct->seg_ctx_index = ct_seg->seg_ctx_index;
+ ct->ct_seg_index = ct_seg->ct_seg_index;
+ ct_seg->server_n_sessions += 1;
+ ct_seg->client_n_sessions += 1;
+ fs_index = ct_seg->segment_index;
+
+ clib_rwlock_writer_unlock (&cm->app_segs_lock);
+ }
+
+ /*
+ * Allocate and initialize the fifos
+ */
+ fs = segment_manager_get_segment_w_lock (sm, fs_index);
+ rv = segment_manager_try_alloc_fifos (
+ fs, ls->thread_index, props->rx_fifo_size, props->tx_fifo_size,
+ &ls->rx_fifo, &ls->tx_fifo);
+ if (rv)
{
segment_manager_segment_reader_unlock (sm);
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
+ __atomic_sub_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
+ __atomic_sub_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
+
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
+ return rv;
}
- client->cb_fns.session_connected_callback (client_wrk->wrk_index,
- ls->client_opaque,
- (session_t *) ls, is_fail);
+ ls->rx_fifo->shr->master_session_index = ls->session_index;
+ ls->tx_fifo->shr->master_session_index = ls->session_index;
+ ls->rx_fifo->master_thread_index = ls->thread_index;
+ ls->tx_fifo->master_thread_index = ls->thread_index;
+
+ seg_handle = segment_manager_segment_handle (sm, fs);
+ segment_manager_segment_reader_unlock (sm);
+
+ ct->segment_handle = seg_handle;
- client_key = application_client_local_connect_key (ls);
- hash_set (client_wrk->local_connects, client_key, client_key);
return 0;
}
static void
-application_local_session_fix_eventds (svm_msg_q_t * sq, svm_msg_q_t * cq)
+ct_accept_one (u32 thread_index, u32 ho_index)
{
- int fd;
+ ct_connection_t *sct, *cct, *ho;
+ transport_connection_t *ll_ct;
+ app_worker_t *server_wrk;
+ u32 cct_index, ll_index;
+ session_t *ss, *ll;
/*
- * segment manager initializes only the producer eventds, since vpp is
- * typically the producer. But for local sessions, we also pass to the
- * apps the mqs they listen on for events from peer apps, so they are also
- * consumer fds.
+ * Alloc client ct and initialize from ho
*/
- fd = svm_msg_q_get_producer_eventfd (sq);
- svm_msg_q_set_consumer_eventfd (sq, fd);
- fd = svm_msg_q_get_producer_eventfd (cq);
- svm_msg_q_set_consumer_eventfd (cq, fd);
-}
-
-int
-app_worker_local_session_connect (app_worker_t * client_wrk,
- app_worker_t * server_wrk,
- local_session_t * ll, u32 opaque)
-{
- u32 seg_size, evt_q_sz, evt_q_elts, margin = 16 << 10;
- u32 round_rx_fifo_sz, round_tx_fifo_sz, sm_index;
- segment_manager_properties_t *props, *cprops;
- int rv, has_transport, seg_index;
- svm_fifo_segment_private_t *seg;
- application_t *server, *client;
- segment_manager_t *sm;
- local_session_t *ls;
- svm_msg_q_t *sq, *cq;
- u64 segment_handle;
-
- ls = app_worker_local_session_alloc (server_wrk);
- server = application_get (server_wrk->app_index);
- client = application_get (client_wrk->app_index);
+ cct = ct_connection_alloc (thread_index);
+ cct_index = cct->c_c_index;
- props = application_segment_manager_properties (server);
- cprops = application_segment_manager_properties (client);
- evt_q_elts = props->evt_q_size + cprops->evt_q_size;
- evt_q_sz = segment_manager_evt_q_expected_size (evt_q_elts);
- round_rx_fifo_sz = 1 << max_log2 (props->rx_fifo_size);
- round_tx_fifo_sz = 1 << max_log2 (props->tx_fifo_size);
- seg_size = round_rx_fifo_sz + round_tx_fifo_sz + evt_q_sz + margin;
+ ho = ct_half_open_get (ho_index);
- has_transport = session_has_transport ((session_t *) ll);
- if (!has_transport)
+ /* Unlikely but half-open session and transport could have been freed */
+ if (PREDICT_FALSE (!ho))
{
- /* Local sessions don't have backing transport */
- ls->port = ll->port;
- sm = app_worker_get_local_segment_manager (server_wrk);
+ ct_connection_free (cct);
+ return;
}
- else
+
+ clib_memcpy (cct, ho, sizeof (*ho));
+ cct->c_c_index = cct_index;
+ cct->c_thread_index = thread_index;
+ cct->flags |= CT_CONN_F_HALF_OPEN;
+
+ /* Notify session layer that half-open is on a different thread
+ * and mark ho connection index reusable. Avoids another rpc
+ */
+ session_half_open_migrate_notify (&cct->connection);
+ session_half_open_migrated_notify (&cct->connection);
+ ct_half_open_add_reusable (ho_index);
+
+ /*
+ * Alloc and init server transport
+ */
+
+ ll_index = cct->peer_index;
+ ll = listen_session_get (ll_index);
+ sct = ct_connection_alloc (thread_index);
+ /* Transport not necessarily ct but it might, so grab after sct alloc */
+ ll_ct = listen_session_get_transport (ll);
+
+ /* Make sure cct is valid after sct alloc */
+ cct = ct_connection_get (cct_index, thread_index);
+
+ sct->c_rmt_port = 0;
+ sct->c_lcl_port = ll_ct->lcl_port;
+ sct->c_is_ip4 = cct->c_is_ip4;
+ clib_memcpy (&sct->c_lcl_ip, &cct->c_rmt_ip, sizeof (cct->c_rmt_ip));
+ sct->client_wrk = cct->client_wrk;
+ sct->c_proto = TRANSPORT_PROTO_NONE;
+ sct->client_opaque = cct->client_opaque;
+ sct->actual_tp = cct->actual_tp;
+
+ sct->peer_index = cct->c_c_index;
+ cct->peer_index = sct->c_c_index;
+
+ /*
+ * Accept server session. Client session is created only after
+ * server confirms accept.
+ */
+ ss = session_alloc (thread_index);
+ ll = listen_session_get (ll_index);
+ ss->session_type = session_type_from_proto_and_ip (TRANSPORT_PROTO_NONE,
+ sct->c_is_ip4);
+ ss->connection_index = sct->c_c_index;
+ ss->listener_handle = listen_session_get_handle (ll);
+ session_set_state (ss, SESSION_STATE_CREATED);
+
+ server_wrk = application_listener_select_worker (ll);
+ ss->app_wrk_index = server_wrk->wrk_index;
+
+ sct->c_s_index = ss->session_index;
+ sct->server_wrk = ss->app_wrk_index;
+
+ if (ct_init_accepted_session (server_wrk, sct, ss, ll))
{
- session_t *sl = (session_t *) ll;
- transport_connection_t *tc;
- tc = listen_session_get_transport (sl);
- ls->port = tc->lcl_port;
- sm = app_worker_get_listen_segment_manager (server_wrk, sl);
+ ct_session_connect_notify (ss, SESSION_E_ALLOC);
+ ct_connection_free (sct);
+ session_free (ss);
+ return;
}
- seg_index = segment_manager_add_segment (sm, seg_size);
- if (seg_index < 0)
+ cct->server_wrk = sct->server_wrk;
+ cct->seg_ctx_index = sct->seg_ctx_index;
+ cct->ct_seg_index = sct->ct_seg_index;
+ cct->client_rx_fifo = ss->tx_fifo;
+ cct->client_tx_fifo = ss->rx_fifo;
+ cct->client_rx_fifo->refcnt++;
+ cct->client_tx_fifo->refcnt++;
+ cct->segment_handle = sct->segment_handle;
+
+ session_set_state (ss, SESSION_STATE_ACCEPTING);
+ if (app_worker_accept_notify (server_wrk, ss))
{
- clib_warning ("failed to add new cut-through segment");
- return seg_index;
+ ct_session_connect_notify (ss, SESSION_E_REFUSED);
+ ct_session_dealloc_fifos (sct, ss->rx_fifo, ss->tx_fifo);
+ ct_connection_free (sct);
+ session_free (ss);
}
- seg = segment_manager_get_segment_w_lock (sm, seg_index);
- sq = segment_manager_alloc_queue (seg, props);
- cq = segment_manager_alloc_queue (seg, cprops);
+}
- if (props->use_mq_eventfd)
- application_local_session_fix_eventds (sq, cq);
+static void
+ct_accept_rpc_wrk_handler (void *rpc_args)
+{
+ u32 thread_index, n_connects, i, n_pending;
+ const u32 max_connects = 32;
+ ct_worker_t *wrk;
+ u8 need_rpc = 0;
- ls->server_evt_q = pointer_to_uword (sq);
- ls->client_evt_q = pointer_to_uword (cq);
- rv = segment_manager_try_alloc_fifos (seg, props->rx_fifo_size,
- props->tx_fifo_size,
- &ls->rx_fifo, &ls->tx_fifo);
- if (rv)
+ thread_index = pointer_to_uword (rpc_args);
+ wrk = ct_worker_get (thread_index);
+
+ /* Connects could be handled without worker barrier so grab lock */
+ clib_spinlock_lock (&wrk->pending_connects_lock);
+
+ n_pending = clib_fifo_elts (wrk->pending_connects);
+ n_connects = clib_min (n_pending, max_connects);
+ vec_validate (wrk->new_connects, n_connects);
+
+ for (i = 0; i < n_connects; i++)
+ clib_fifo_sub1 (wrk->pending_connects, wrk->new_connects[i]);
+
+ if (n_pending == n_connects)
+ wrk->have_connects = 0;
+ else
+ need_rpc = 1;
+
+ clib_spinlock_unlock (&wrk->pending_connects_lock);
+
+ for (i = 0; i < n_connects; i++)
+ ct_accept_one (thread_index, wrk->new_connects[i]);
+
+ if (need_rpc)
+ session_send_rpc_evt_to_thread_force (
+ thread_index, ct_accept_rpc_wrk_handler,
+ uword_to_pointer (thread_index, void *));
+}
+
+static void
+ct_fwrk_flush_connects (void *rpc_args)
+{
+ u32 thread_index, fwrk_index, n_workers;
+ ct_main_t *cm = &ct_main;
+ ct_worker_t *wrk;
+ u8 need_rpc;
+
+ fwrk_index = cm->fwrk_thread;
+ n_workers = vec_len (cm->fwrk_pending_connects);
+
+ for (thread_index = fwrk_index; thread_index < n_workers; thread_index++)
{
- clib_warning ("failed to add fifos in cut-through segment");
- segment_manager_segment_reader_unlock (sm);
- goto failed;
- }
- sm_index = segment_manager_index (sm);
- ls->rx_fifo->ct_session_index = ls->session_index;
- ls->tx_fifo->ct_session_index = ls->session_index;
- ls->rx_fifo->segment_manager = sm_index;
- ls->tx_fifo->segment_manager = sm_index;
- ls->rx_fifo->segment_index = seg_index;
- ls->tx_fifo->segment_index = seg_index;
- ls->svm_segment_index = seg_index;
- ls->listener_index = ll->session_index;
- ls->client_wrk_index = client_wrk->wrk_index;
- ls->client_opaque = opaque;
- ls->listener_session_type = ll->session_type;
- ls->session_state = SESSION_STATE_READY;
-
- segment_handle = segment_manager_segment_handle (sm, seg);
- if ((rv = server->cb_fns.add_segment_callback (server_wrk->api_client_index,
- segment_handle)))
- {
- clib_warning ("failed to notify server of new segment");
- segment_manager_segment_reader_unlock (sm);
- goto failed;
+ if (!vec_len (cm->fwrk_pending_connects[thread_index]))
+ continue;
+
+ wrk = ct_worker_get (thread_index);
+
+ /* Connects can be done without worker barrier, grab dst worker lock */
+ if (thread_index != fwrk_index)
+ clib_spinlock_lock (&wrk->pending_connects_lock);
+
+ clib_fifo_add (wrk->pending_connects,
+ cm->fwrk_pending_connects[thread_index],
+ vec_len (cm->fwrk_pending_connects[thread_index]));
+ if (!wrk->have_connects)
+ {
+ wrk->have_connects = 1;
+ need_rpc = 1;
+ }
+
+ if (thread_index != fwrk_index)
+ clib_spinlock_unlock (&wrk->pending_connects_lock);
+
+ vec_reset_length (cm->fwrk_pending_connects[thread_index]);
+
+ if (need_rpc)
+ session_send_rpc_evt_to_thread_force (
+ thread_index, ct_accept_rpc_wrk_handler,
+ uword_to_pointer (thread_index, void *));
}
- segment_manager_segment_reader_unlock (sm);
- if ((rv = server->cb_fns.session_accept_callback ((session_t *) ls)))
+
+ cm->fwrk_have_flush = 0;
+}
+
+static void
+ct_program_connect_to_wrk (u32 ho_index)
+{
+ ct_main_t *cm = &ct_main;
+ u32 thread_index;
+
+ /* Simple round-robin policy for spreading sessions over workers. We skip
+ * thread index 0, i.e., offset the index by 1, when we have workers as it
+ * is the one dedicated to main thread. Note that n_workers does not include
+ * main thread */
+ cm->n_sessions += 1;
+ thread_index = cm->n_workers ? (cm->n_sessions % cm->n_workers) + 1 : 0;
+
+ /* Pospone flushing of connect request to dst worker until after session
+ * layer fully initializes the half-open session. */
+ vec_add1 (cm->fwrk_pending_connects[thread_index], ho_index);
+ if (!cm->fwrk_have_flush)
{
- clib_warning ("failed to send accept cut-through notify to server");
- goto failed;
+ session_send_rpc_evt_to_thread_force (
+ cm->fwrk_thread, ct_fwrk_flush_connects,
+ uword_to_pointer (thread_index, void *));
+ cm->fwrk_have_flush = 1;
}
- if (server->flags & APP_OPTIONS_FLAGS_IS_BUILTIN)
- app_worker_local_session_connect_notify (ls);
+}
+
+static int
+ct_connect (app_worker_t *client_wrk, session_t *ll,
+ session_endpoint_cfg_t *sep)
+{
+ ct_connection_t *ho;
+ u32 ho_index;
+
+ /*
+ * Alloc and init client half-open transport
+ */
+ ho = ct_half_open_alloc ();
+ ho_index = ho->c_c_index;
+ ho->c_rmt_port = sep->port;
+ ho->c_lcl_port = 0;
+ ho->c_is_ip4 = sep->is_ip4;
+ ho->client_opaque = sep->opaque;
+ ho->client_wrk = client_wrk->wrk_index;
+ ho->peer_index = ll->session_index;
+ ho->c_proto = TRANSPORT_PROTO_NONE;
+ ho->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
+ clib_memcpy (&ho->c_rmt_ip, &sep->ip, sizeof (sep->ip));
+ ho->flags |= CT_CONN_F_CLIENT;
+ ho->c_s_index = ~0;
+ ho->actual_tp = sep->original_tp;
+
+ /*
+ * Program connect on a worker, connected reply comes
+ * after server accepts the connection.
+ */
+ ct_program_connect_to_wrk (ho_index);
+
+ return ho_index;
+}
+
+static u32
+ct_start_listen (u32 app_listener_index, transport_endpoint_cfg_t *tep)
+{
+ session_endpoint_cfg_t *sep;
+ ct_connection_t *ct;
+
+ sep = (session_endpoint_cfg_t *) tep;
+ ct = ct_connection_alloc (0);
+ ct->server_wrk = sep->app_wrk_index;
+ ct->c_is_ip4 = sep->is_ip4;
+ clib_memcpy (&ct->c_lcl_ip, &sep->ip, sizeof (sep->ip));
+ ct->c_lcl_port = sep->port;
+ ct->c_s_index = app_listener_index;
+ ct->actual_tp = sep->transport_proto;
+ return ct->c_c_index;
+}
+
+static u32
+ct_stop_listen (u32 ct_index)
+{
+ ct_connection_t *ct;
+ ct = ct_connection_get (ct_index, 0);
+ ct_connection_free (ct);
return 0;
+}
-failed:
- if (!has_transport)
- segment_manager_del_segment (sm, seg);
- return rv;
+static transport_connection_t *
+ct_listener_get (u32 ct_index)
+{
+ return (transport_connection_t *) ct_connection_get (ct_index, 0);
}
-int
-app_worker_local_session_disconnect (u32 app_wrk_index, local_session_t * ls)
+static transport_connection_t *
+ct_session_half_open_get (u32 ct_index)
+{
+ return (transport_connection_t *) ct_half_open_get (ct_index);
+}
+
+static void
+ct_session_cleanup (u32 conn_index, u32 thread_index)
+{
+ ct_connection_t *ct, *peer_ct;
+
+ ct = ct_connection_get (conn_index, thread_index);
+ if (!ct)
+ return;
+
+ peer_ct = ct_connection_get (ct->peer_index, thread_index);
+ if (peer_ct)
+ peer_ct->peer_index = ~0;
+
+ ct_connection_free (ct);
+}
+
+static void
+ct_cleanup_ho (u32 ho_index)
+{
+ ct_connection_t *ho;
+
+ ho = ct_half_open_get (ho_index);
+ ct_connection_free (ho);
+}
+
+static int
+ct_session_connect (transport_endpoint_cfg_t * tep)
+{
+ session_endpoint_cfg_t *sep_ext;
+ session_endpoint_t _sep, *sep = &_sep;
+ app_worker_t *app_wrk;
+ session_handle_t lh;
+ application_t *app;
+ app_listener_t *al;
+ u32 table_index;
+ session_t *ll;
+ u8 fib_proto;
+
+ sep_ext = (session_endpoint_cfg_t *) tep;
+ _sep = *(session_endpoint_t *) tep;
+ app_wrk = app_worker_get (sep_ext->app_wrk_index);
+ app = application_get (app_wrk->app_index);
+
+ sep->transport_proto = sep_ext->original_tp;
+ table_index = application_local_session_table (app);
+ lh = session_lookup_local_endpoint (table_index, sep);
+ if (lh == SESSION_DROP_HANDLE)
+ return SESSION_E_FILTERED;
+
+ if (lh == SESSION_INVALID_HANDLE)
+ goto global_scope;
+
+ ll = listen_session_get_from_handle (lh);
+ al = app_listener_get_w_session (ll);
+
+ /*
+ * Break loop if rule in local table points to connecting app. This
+ * can happen if client is a generic proxy. Route connect through
+ * global table instead.
+ */
+ if (al->app_index == app->app_index)
+ goto global_scope;
+
+ return ct_connect (app_wrk, ll, sep_ext);
+
+ /*
+ * If nothing found, check the global scope for locally attached
+ * destinations. Make sure first that we're allowed to.
+ */
+
+global_scope:
+ if (session_endpoint_is_local (sep))
+ return SESSION_E_NOROUTE;
+
+ if (!application_has_global_scope (app))
+ return SESSION_E_SCOPE;
+
+ fib_proto = session_endpoint_fib_proto (sep);
+ table_index = session_lookup_get_index_for_fib (fib_proto, sep->fib_index);
+ ll = session_lookup_listener_wildcard (table_index, sep);
+
+ /* Avoid connecting app to own listener */
+ if (ll && ll->app_index != app->app_index)
+ return ct_connect (app_wrk, ll, sep_ext);
+
+ /* Failed to connect but no error */
+ return SESSION_E_LOCAL_CONNECT;
+}
+
+static inline int
+ct_close_is_reset (ct_connection_t *ct, session_t *s)
+{
+ if (ct->flags & CT_CONN_F_CLIENT)
+ return (svm_fifo_max_dequeue (ct->client_rx_fifo) > 0);
+ else
+ return (svm_fifo_max_dequeue (s->rx_fifo) > 0);
+}
+
+static void
+ct_session_cleanup_server_session (session_t *s)
+{
+ ct_connection_t *ct;
+
+ ct = (ct_connection_t *) session_get_transport (s);
+ ct_session_dealloc_fifos (ct, s->rx_fifo, s->tx_fifo);
+ session_free (s);
+ ct_connection_free (ct);
+}
+
+static void
+ct_session_postponed_cleanup (ct_connection_t *ct)
{
- app_worker_t *client_wrk, *server_wrk;
+ ct_connection_t *peer_ct;
+ app_worker_t *app_wrk;
+ session_t *s;
- client_wrk = app_worker_get_if_valid (ls->client_wrk_index);
- server_wrk = app_worker_get (ls->app_wrk_index);
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
- if (ls->session_state == SESSION_STATE_CLOSED)
- return app_worker_local_session_cleanup (client_wrk, server_wrk, ls);
+ peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
+ if (peer_ct)
+ {
+ if (ct_close_is_reset (ct, s))
+ session_transport_reset_notify (&peer_ct->connection);
+ else
+ session_transport_closing_notify (&peer_ct->connection);
+ }
+ session_transport_closed_notify (&ct->connection);
- if (app_wrk_index == ls->client_wrk_index)
+ /* It would be cleaner to call session_transport_delete_notify
+ * but then we can't control session cleanup lower */
+ session_set_state (s, SESSION_STATE_TRANSPORT_DELETED);
+ if (app_wrk)
+ app_worker_cleanup_notify (app_wrk, s, SESSION_CLEANUP_TRANSPORT);
+
+ if (ct->flags & CT_CONN_F_CLIENT)
{
- mq_send_local_session_disconnected_cb (ls->app_wrk_index, ls);
+ /* Normal free for client session as the fifos are allocated through
+ * the connects segment manager in a segment that's not shared with
+ * the server */
+ ct_session_dealloc_fifos (ct, ct->client_rx_fifo, ct->client_tx_fifo);
+ session_program_cleanup (s);
+ ct_connection_free (ct);
}
else
{
- if (!client_wrk)
- {
- return app_worker_local_session_cleanup (client_wrk, server_wrk,
- ls);
- }
- else if (ls->session_state < SESSION_STATE_READY)
+ /* Manual session and fifo segment cleanup to avoid implicit
+ * segment manager cleanups and notifications */
+ if (app_wrk)
{
- application_t *client = application_get (client_wrk->app_index);
- client->cb_fns.session_connected_callback (client_wrk->wrk_index,
- ls->client_opaque,
- (session_t *) ls,
- 1 /* is_fail */ );
- ls->session_state = SESSION_STATE_CLOSED;
- return app_worker_local_session_cleanup (client_wrk, server_wrk,
- ls);
+ /* Remove custom cleanup notify infra when/if switching to normal
+ * session cleanup. Note that ct is freed in the cb function */
+ app_worker_cleanup_notify_custom (app_wrk, s,
+ SESSION_CLEANUP_SESSION,
+ ct_session_cleanup_server_session);
}
else
{
- mq_send_local_session_disconnected_cb (client_wrk->wrk_index, ls);
+ ct_connection_free (ct);
}
}
+}
- ls->session_state = SESSION_STATE_CLOSED;
+static void
+ct_handle_cleanups (void *args)
+{
+ uword thread_index = pointer_to_uword (args);
+ const u32 max_cleanups = 100;
+ ct_cleanup_req_t *req;
+ ct_connection_t *ct;
+ u32 n_to_handle = 0;
+ ct_worker_t *wrk;
+ session_t *s;
- return 0;
+ wrk = ct_worker_get (thread_index);
+ wrk->have_cleanups = 0;
+ n_to_handle = clib_fifo_elts (wrk->pending_cleanups);
+ n_to_handle = clib_min (n_to_handle, max_cleanups);
+
+ while (n_to_handle)
+ {
+ clib_fifo_sub2 (wrk->pending_cleanups, req);
+ ct = ct_connection_get (req->ct_index, thread_index);
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+ if (!svm_fifo_has_event (s->tx_fifo))
+ ct_session_postponed_cleanup (ct);
+ else
+ clib_fifo_add1 (wrk->pending_cleanups, *req);
+ n_to_handle -= 1;
+ }
+
+ if (clib_fifo_elts (wrk->pending_cleanups))
+ {
+ wrk->have_cleanups = 1;
+ session_send_rpc_evt_to_thread_force (
+ thread_index, ct_handle_cleanups,
+ uword_to_pointer (thread_index, void *));
+ }
}
-int
-app_worker_local_session_disconnect_w_index (u32 app_wrk_index, u32 ls_index)
+static void
+ct_program_cleanup (ct_connection_t *ct)
{
- app_worker_t *app_wrk;
- local_session_t *ls;
- app_wrk = app_worker_get (app_wrk_index);
- ls = app_worker_get_local_session (app_wrk, ls_index);
- return app_worker_local_session_disconnect (app_wrk_index, ls);
+ ct_cleanup_req_t *req;
+ uword thread_index;
+ ct_worker_t *wrk;
+
+ thread_index = ct->c_thread_index;
+ wrk = ct_worker_get (ct->c_thread_index);
+
+ clib_fifo_add2 (wrk->pending_cleanups, req);
+ req->ct_index = ct->c_c_index;
+
+ if (wrk->have_cleanups)
+ return;
+
+ wrk->have_cleanups = 1;
+ session_send_rpc_evt_to_thread_force (
+ thread_index, ct_handle_cleanups, uword_to_pointer (thread_index, void *));
}
-void
-app_worker_format_local_sessions (app_worker_t * app_wrk, int verbose)
+static void
+ct_session_close (u32 ct_index, u32 thread_index)
{
- vlib_main_t *vm = vlib_get_main ();
- app_worker_t *client_wrk;
- local_session_t *ls;
- transport_proto_t tp;
- u8 *conn = 0;
+ ct_connection_t *ct, *peer_ct;
+ session_t *s;
- /* Header */
- if (app_wrk == 0)
+ ct = ct_connection_get (ct_index, thread_index);
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+ peer_ct = ct_connection_get (ct->peer_index, thread_index);
+ if (peer_ct)
{
- vlib_cli_output (vm, "%-40s%-15s%-20s", "Connection", "ServerApp",
- "ClientApp");
- return;
+ peer_ct->peer_index = ~0;
+ /* Make sure session was allocated */
+ if (peer_ct->flags & CT_CONN_F_HALF_OPEN)
+ {
+ ct_session_connect_notify (s, SESSION_E_REFUSED);
+ ct->peer_index = ~0;
+ }
+ else if (peer_ct->c_s_index == ~0)
+ {
+ /* should not happen */
+ clib_warning ("ct peer without session");
+ ct_connection_free (peer_ct);
+ }
}
- if (!pool_elts (app_wrk->local_sessions)
- && !pool_elts (app_wrk->local_connects))
- return;
+ /* Do not send closed notify to make sure pending tx events are
+ * still delivered and program cleanup */
+ ct_program_cleanup (ct);
+}
+
+static transport_connection_t *
+ct_session_get (u32 ct_index, u32 thread_index)
+{
+ return (transport_connection_t *) ct_connection_get (ct_index,
+ thread_index);
+}
+
+static u8 *
+format_ct_connection_id (u8 * s, va_list * args)
+{
+ ct_connection_t *ct = va_arg (*args, ct_connection_t *);
+ if (!ct)
+ return s;
+ if (ct->c_is_ip4)
+ {
+ s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index,
+ ct->c_s_index, format_transport_proto_short, ct->actual_tp,
+ format_ip4_address, &ct->c_lcl_ip4,
+ clib_net_to_host_u16 (ct->c_lcl_port), format_ip4_address,
+ &ct->c_rmt_ip4, clib_net_to_host_u16 (ct->c_rmt_port));
+ }
+ else
+ {
+ s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index,
+ ct->c_s_index, format_transport_proto_short, ct->actual_tp,
+ format_ip6_address, &ct->c_lcl_ip6,
+ clib_net_to_host_u16 (ct->c_lcl_port), format_ip6_address,
+ &ct->c_rmt_ip6, clib_net_to_host_u16 (ct->c_rmt_port));
+ }
- /* *INDENT-OFF* */
- pool_foreach (ls, app_wrk->local_sessions, ({
- tp = session_type_transport_proto(ls->listener_session_type);
- conn = format (0, "[L][%U] *:%u", format_transport_proto_short, tp,
- ls->port);
- client_wrk = app_worker_get (ls->client_wrk_index);
- vlib_cli_output (vm, "%-40v%-15u%-20u", conn, ls->app_index,
- client_wrk->app_index);
- vec_reset_length (conn);
- }));
- /* *INDENT-ON* */
+ return s;
+}
- vec_free (conn);
+static int
+ct_custom_tx (void *session, transport_send_params_t * sp)
+{
+ session_t *s = (session_t *) session;
+ if (session_has_transport (s))
+ return 0;
+ /* If event enqueued towards peer, remove from scheduler and remove
+ * session tx flag, i.e., accept new tx events. Unset fifo flag now to
+ * avoid missing events if peer did not clear fifo flag yet, which is
+ * interpreted as successful notification and session is descheduled. */
+ svm_fifo_unset_event (s->tx_fifo);
+ if (!ct_session_tx (s))
+ sp->flags = TRANSPORT_SND_F_DESCHED;
+
+ /* The scheduler uses packet count as a means of upper bounding the amount
+ * of work done per dispatch. So make it look like we have sent something */
+ return 1;
}
-void
-app_worker_format_local_connects (app_worker_t * app, int verbose)
+static int
+ct_app_rx_evt (transport_connection_t * tc)
{
- vlib_main_t *vm = vlib_get_main ();
- u32 app_wrk_index, session_index;
- app_worker_t *server_wrk;
- local_session_t *ls;
- u64 client_key;
- u64 value;
+ ct_connection_t *ct = (ct_connection_t *) tc, *peer_ct;
+ session_t *ps, *s;
- /* Header */
- if (app == 0)
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+ if (session_has_transport (s) || s->session_state < SESSION_STATE_READY)
+ return -1;
+ peer_ct = ct_connection_get (ct->peer_index, tc->thread_index);
+ if (!peer_ct || (peer_ct->flags & CT_CONN_F_HALF_OPEN))
+ return -1;
+ ps = session_get (peer_ct->c_s_index, peer_ct->c_thread_index);
+ if (ps->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ return -1;
+ return session_dequeue_notify (ps);
+}
+
+static u8 *
+format_ct_listener (u8 * s, va_list * args)
+{
+ u32 tc_index = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
+ u32 __clib_unused verbose = va_arg (*args, u32);
+ ct_connection_t *ct = ct_connection_get (tc_index, 0);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
+ if (verbose)
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "LISTEN");
+ return s;
+}
+
+static u8 *
+format_ct_half_open (u8 *s, va_list *args)
+{
+ u32 ho_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ ct_connection_t *ct = ct_half_open_get (ho_index);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
+ if (verbose)
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "HALF-OPEN");
+ return s;
+}
+
+static u8 *
+format_ct_connection (u8 * s, va_list * args)
+{
+ ct_connection_t *ct = va_arg (*args, ct_connection_t *);
+ u32 verbose = va_arg (*args, u32);
+
+ if (!ct)
+ return s;
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
+ if (verbose)
{
- if (verbose)
- vlib_cli_output (vm, "%-40s%-15s%-20s%-10s", "Connection", "App",
- "Peer App", "SegManager");
- else
- vlib_cli_output (vm, "%-40s%-15s%-20s", "Connection", "App",
- "Peer App");
- return;
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "ESTABLISHED");
+ if (verbose > 1)
+ {
+ s = format (s, "\n");
+ }
}
+ return s;
+}
- if (!app->local_connects)
- return;
+static u8 *
+format_ct_session (u8 * s, va_list * args)
+{
+ u32 ct_index = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ ct_connection_t *ct;
- /* *INDENT-OFF* */
- hash_foreach (client_key, value, app->local_connects, ({
- application_client_local_connect_key_parse (client_key, &app_wrk_index,
- &session_index);
- server_wrk = app_worker_get (app_wrk_index);
- ls = app_worker_get_local_session (server_wrk, session_index);
- vlib_cli_output (vm, "%-40s%-15s%-20s", "TODO", ls->app_wrk_index,
- ls->client_wrk_index);
- }));
- /* *INDENT-ON* */
+ ct = ct_connection_get (ct_index, thread_index);
+ if (!ct)
+ {
+ s = format (s, "empty\n");
+ return s;
+ }
+
+ s = format (s, "%U", format_ct_connection, ct, verbose);
+ return s;
+}
+
+clib_error_t *
+ct_enable_disable (vlib_main_t * vm, u8 is_en)
+{
+ vlib_thread_main_t *vtm = &vlib_thread_main;
+ ct_main_t *cm = &ct_main;
+ ct_worker_t *wrk;
+
+ cm->n_workers = vlib_num_workers ();
+ cm->fwrk_thread = transport_cl_thread ();
+ vec_validate (cm->wrk, vtm->n_vlib_mains);
+ vec_foreach (wrk, cm->wrk)
+ clib_spinlock_init (&wrk->pending_connects_lock);
+ clib_spinlock_init (&cm->ho_reuseable_lock);
+ clib_rwlock_init (&cm->app_segs_lock);
+ vec_validate (cm->fwrk_pending_connects, cm->n_workers);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+static const transport_proto_vft_t cut_thru_proto = {
+ .enable = ct_enable_disable,
+ .start_listen = ct_start_listen,
+ .stop_listen = ct_stop_listen,
+ .get_connection = ct_session_get,
+ .get_listener = ct_listener_get,
+ .get_half_open = ct_session_half_open_get,
+ .cleanup = ct_session_cleanup,
+ .cleanup_ho = ct_cleanup_ho,
+ .connect = ct_session_connect,
+ .close = ct_session_close,
+ .custom_tx = ct_custom_tx,
+ .app_rx_evt = ct_app_rx_evt,
+ .format_listener = format_ct_listener,
+ .format_half_open = format_ct_half_open,
+ .format_connection = format_ct_session,
+ .transport_options = {
+ .name = "ct",
+ .short_name = "C",
+ .tx_type = TRANSPORT_TX_INTERNAL,
+ .service_type = TRANSPORT_SERVICE_VC,
+ },
+};
+/* *INDENT-ON* */
+
+static inline int
+ct_session_can_tx (session_t *s)
+{
+ return (s->session_state == SESSION_STATE_READY ||
+ s->session_state == SESSION_STATE_CLOSING ||
+ s->session_state == SESSION_STATE_APP_CLOSED);
}
+int
+ct_session_tx (session_t * s)
+{
+ ct_connection_t *ct, *peer_ct;
+ session_t *peer_s;
+
+ if (!ct_session_can_tx (s))
+ return 0;
+ ct = (ct_connection_t *) session_get_transport (s);
+ peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
+ if (!peer_ct)
+ return 0;
+ peer_s = session_get (peer_ct->c_s_index, peer_ct->c_thread_index);
+ if (peer_s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ return 0;
+ return session_enqueue_notify (peer_s);
+}
+
+static clib_error_t *
+ct_transport_init (vlib_main_t * vm)
+{
+ transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
+ FIB_PROTOCOL_IP4, ~0);
+ transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
+ FIB_PROTOCOL_IP6, ~0);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ct_transport_init);
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff