X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fsession.h;h=4fa9194077eccb463356ac951cc743451528e65e;hb=dd298e804a25dbebc9e284b3b2d0dfd9bf674ad8;hp=4de7642d29a51c1e3720d86e9a8fffb39daa9a02;hpb=a27a46eaebee7b1d84a6ce998d9c92048b0654b6;p=vpp.git diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h index 4de7642d29a..4fa9194077e 100644 --- a/src/vnet/session/session.h +++ b/src/vnet/session/session.h @@ -15,13 +15,13 @@ #ifndef __included_session_h__ #define __included_session_h__ +#include #include #include #include -#include #include - -#define SESSION_PROXY_LISTENER_INDEX ((u8)~0 - 1) +#include +#include #define foreach_session_input_error \ _(NO_SESSION, "No session drops") \ @@ -31,9 +31,6 @@ _(NOT_READY, "Session not ready packets") \ _(FIFO_FULL, "Packets dropped for lack of rx fifo space") \ _(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \ _(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \ -_(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \ -_(NO_SPACE, "Couldn't allocate a fifo pair") \ -_(SEG_CREATE, "Couldn't create a new segment") typedef enum { @@ -41,7 +38,7 @@ typedef enum foreach_session_input_error #undef _ SESSION_N_ERROR, -} session_error_t; +} session_input_error_t; typedef struct session_tx_context_ { @@ -49,22 +46,54 @@ typedef struct session_tx_context_ session_t *s; transport_proto_vft_t *transport_vft; transport_connection_t *tc; - vlib_buffer_t *b; + transport_send_params_t sp; u32 max_dequeue; - u32 snd_space; u32 left_to_snd; - u32 tx_offset; u32 max_len_to_snd; u16 deq_per_first_buf; u16 deq_per_buf; - u16 snd_mss; u16 n_segs_per_evt; + u16 n_bufs_needed; u8 n_bufs_per_seg; CLIB_CACHE_LINE_ALIGN_MARK (cacheline1); session_dgram_hdr_t hdr; + + /** Vector of tx buffer free lists */ + u32 *tx_buffers; + vlib_buffer_t **transport_pending_bufs; } session_tx_context_t; -typedef struct session_manager_worker_ +typedef struct session_evt_elt +{ + clib_llist_anchor_t evt_list; + session_event_t evt; +} session_evt_elt_t; + +typedef struct session_ctrl_evt_data_ +{ + u8 data[SESSION_CTRL_MSG_MAX_SIZE]; +} session_evt_ctrl_data_t; + +typedef enum session_wrk_state_ +{ + SESSION_WRK_POLLING, + SESSION_WRK_INTERRUPT, + SESSION_WRK_IDLE, +} __clib_packed session_wrk_state_t; + +typedef enum session_wrk_flags_ +{ + SESSION_WRK_F_ADAPTIVE = 1 << 0, +} __clib_packed session_wrk_flag_t; + +#define DMA_TRANS_SIZE 1024 +typedef struct +{ + u32 *pending_tx_buffers; + u16 *pending_tx_nexts; +} session_dma_transfer; + +typedef struct session_worker_ { CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); @@ -74,47 +103,84 @@ typedef struct session_manager_worker_ /** vpp event message queue for worker */ svm_msg_q_t *vpp_event_queue; - /** Our approximation of a "complete" dispatch loop period */ - f64 dispatch_period; - /** vlib_time_now last time around the track */ - f64 last_vlib_time; + clib_time_type_t last_vlib_time; - /** Per-proto enqueue epoch counters */ - u64 current_enqueue_epoch[TRANSPORT_N_PROTO]; + /** vlib_time_now rounded to us precision and as u64 */ + clib_us_time_t last_vlib_us_time; + + /** Convenience pointer to this worker's vlib_main */ + vlib_main_t *vm; /** Per-proto vector of sessions to enqueue */ - u32 *session_to_enqueue[TRANSPORT_N_PROTO]; + u32 **session_to_enqueue; + + /** Timerfd used to periodically signal wrk session queue node */ + int timerfd; + + /** Worker flags */ + session_wrk_flag_t flags; + + /** Worker state */ + session_wrk_state_t state; /** Context for session tx */ session_tx_context_t ctx; - /** Vector of tx buffer free lists */ - u32 *tx_buffers; + /** Pool of session event list elements */ + session_evt_elt_t *event_elts; + + /** Pool of ctrl events data buffers */ + session_evt_ctrl_data_t *ctrl_evts_data; + + /** Head of control events list */ + clib_llist_index_t ctrl_head; + + /** Head of list of elements */ + clib_llist_index_t new_head; - /** Vector of partially read events */ - session_event_t *free_event_vector; + /** Head of list of pending events */ + clib_llist_index_t old_head; - /** Vector of active event vectors */ - session_event_t *pending_event_vector; + /** Vector of buffers to be sent */ + u32 *pending_tx_buffers; - /** Vector of postponed disconnects */ - session_event_t *pending_disconnects; + /** Vector of nexts for the pending tx buffers */ + u16 *pending_tx_nexts; - /** Vector of postponed events */ - session_event_t *postponed_event_vector; + /** Clib file for timerfd. Used only if adaptive mode is on */ + uword timerfd_file; - /** Peekers rw lock */ - clib_rwlock_t peekers_rw_locks; + /** List of pending connects for first worker */ + clib_llist_index_t pending_connects; - u32 last_tx_packets; + /** Flag that is set if main thread signaled to handle connects */ + u32 n_pending_connects; -} session_manager_worker_t; + /** Main thread loops in poll mode without a connect */ + u32 no_connect_loops; -typedef int (session_fifo_rx_fn) (vlib_main_t * vm, + /** List head for first worker evts pending handling on main */ + clib_llist_index_t evts_pending_main; + + int config_index; + u8 dma_enabled; + session_dma_transfer *dma_trans; + u16 trans_head; + u16 trans_tail; + u16 trans_size; + u16 batch_num; + vlib_dma_batch_t *batch; + +#if SESSION_DEBUG + /** last event poll time by thread */ + clib_time_type_t last_event_poll; +#endif +} session_worker_t; + +typedef int (session_fifo_rx_fn) (session_worker_t * wrk, vlib_node_runtime_t * node, - session_manager_worker_t * wrk, - session_event_t * e, int *n_tx_pkts); + session_evt_elt_t * e, int *n_tx_packets); extern session_fifo_rx_fn session_tx_fifo_peek_and_snd; extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd; @@ -122,13 +188,18 @@ extern session_fifo_rx_fn session_tx_fifo_dequeue_internal; u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e); -typedef struct session_manager_main_ +typedef void (*session_update_time_fn) (f64 time_now, u8 thread_index); + +typedef struct session_main_ { /** Worker contexts */ - session_manager_worker_t *wrk; + session_worker_t *wrk; - /** Event queues memfd segment initialized only if so configured */ - ssvm_private_t evt_qs_segment; + /** Vector of transport update time functions */ + session_update_time_fn *update_time_fns; + + /** Event queues memfd segment */ + fifo_segment_t wrk_mqs_segment; /** Unique segment name counter */ u32 unique_segment_name_counter; @@ -141,6 +212,20 @@ typedef struct session_manager_main_ * Trade memory for speed, for now */ u32 *session_type_to_next; + /** Thread for cl and ho that rely on cl allocs */ + u32 transport_cl_thread; + + transport_proto_t last_transport_proto_type; + + /** Number of workers at pool realloc barrier */ + volatile u32 pool_realloc_at_barrier; + + /** Number of workers doing reallocs */ + volatile u32 pool_realloc_doing_work; + + /** Lock to synchronize parallel forced reallocs */ + clib_spinlock_t pool_realloc_lock; + /* * Config parameters */ @@ -148,14 +233,29 @@ typedef struct session_manager_main_ /** Session manager is enabled */ u8 is_enabled; + /** Session manager initialized (not necessarily enabled) */ + u8 is_initialized; + + /** Enable session manager at startup */ + u8 session_enable_asap; + + /** Poll session node in main thread */ + u8 poll_main; + + /** Allocate private rx mqs for external apps */ + u8 use_private_rx_mqs; + + /** Do not enable session queue node adaptive mode */ + u8 no_adaptive; + /** vpp fifo event queue configured length */ - u32 configured_event_queue_length; + u32 configured_wrk_mq_length; /** Session ssvm segment configs*/ - uword session_baseva; - uword session_va_space_size; - uword evt_qs_segment_size; - u8 evt_qs_use_memfd_seg; + uword wrk_mqs_segment_size; + + /** Session enable dma*/ + u8 dma_enabled; /** Session table size parameters */ u32 configured_v4_session_table_buckets; @@ -174,68 +274,122 @@ typedef struct session_manager_main_ /** Preallocate session config parameter */ u32 preallocated_sessions; -#if SESSION_DEBUG - /** - * last event poll time by thread - * Debug only. Will cause false cache-line sharing as-is - */ - f64 *last_event_poll_by_thread; -#endif + u16 msg_id_base; +} session_main_t; -} session_manager_main_t; - -extern session_manager_main_t session_manager_main; +extern session_main_t session_main; extern vlib_node_registration_t session_queue_node; extern vlib_node_registration_t session_queue_process_node; +extern vlib_node_registration_t session_queue_pre_input_node; -#define SESSION_Q_PROCESS_FLUSH_FRAMES 1 -#define SESSION_Q_PROCESS_STOP 2 +typedef enum session_q_process_evt_ +{ + SESSION_Q_PROCESS_RUN_ON_MAIN = 1, + SESSION_Q_PROCESS_STOP +} session_q_process_evt_t; -always_inline u8 -stream_session_is_valid (u32 si, u8 thread_index) +#define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1) +#define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1) + +static inline void +session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt) { - session_t *s; - s = pool_elt_at_index (session_manager_main.wrk[thread_index].sessions, si); - if (s->thread_index != thread_index || s->session_index != si - /* || s->server_rx_fifo->master_session_index != si - || s->server_tx_fifo->master_session_index != si - || s->server_rx_fifo->master_thread_index != thread_index - || s->server_tx_fifo->master_thread_index != thread_index */ ) - return 0; - return 1; + clib_llist_add_tail (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->old_head)); +} + +static inline void +session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt) +{ + clib_llist_add (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->old_head)); +} + + +static inline u32 +session_evt_ctrl_data_alloc (session_worker_t * wrk) +{ + session_evt_ctrl_data_t *data; + pool_get (wrk->ctrl_evts_data, data); + return (data - wrk->ctrl_evts_data); +} + +static inline session_evt_elt_t * +session_evt_alloc_ctrl (session_worker_t * wrk) +{ + session_evt_elt_t *elt; + clib_llist_get (wrk->event_elts, elt); + clib_llist_add_tail (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->ctrl_head)); + return elt; +} + +static inline void * +session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt) +{ + return (void *) (pool_elt_at_index (wrk->ctrl_evts_data, + elt->evt.ctrl_data_index)); +} + +static inline void +session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt) +{ + ASSERT (elt->evt.event_type > SESSION_IO_EVT_BUILTIN_TX); + pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index); +} + +static inline session_evt_elt_t * +session_evt_alloc_new (session_worker_t * wrk) +{ + session_evt_elt_t *elt; + clib_llist_get (wrk->event_elts, elt); + clib_llist_add_tail (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->new_head)); + return elt; } +static inline session_evt_elt_t * +session_evt_alloc_old (session_worker_t * wrk) +{ + session_evt_elt_t *elt; + clib_llist_get (wrk->event_elts, elt); + clib_llist_add_tail (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->old_head)); + return elt; +} + +int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq); + session_t *session_alloc (u32 thread_index); void session_free (session_t * s); void session_free_w_fifos (session_t * s); +void session_cleanup_half_open (session_handle_t ho_handle); +u8 session_is_valid (u32 si, u8 thread_index); always_inline session_t * session_get (u32 si, u32 thread_index) { - ASSERT (stream_session_is_valid (si, thread_index)); - return pool_elt_at_index (session_manager_main.wrk[thread_index].sessions, - si); + ASSERT (session_is_valid (si, thread_index)); + return pool_elt_at_index (session_main.wrk[thread_index].sessions, si); } always_inline session_t * session_get_if_valid (u64 si, u32 thread_index) { - if (thread_index >= vec_len (session_manager_main.wrk)) + if (thread_index >= vec_len (session_main.wrk)) return 0; - if (pool_is_free_index (session_manager_main.wrk[thread_index].sessions, - si)) + if (pool_is_free_index (session_main.wrk[thread_index].sessions, si)) return 0; - ASSERT (stream_session_is_valid (si, thread_index)); - return pool_elt_at_index (session_manager_main.wrk[thread_index].sessions, - si); + ASSERT (session_is_valid (si, thread_index)); + return pool_elt_at_index (session_main.wrk[thread_index].sessions, si); } always_inline session_t * session_get_from_handle (session_handle_t handle) { - session_manager_main_t *smm = &session_manager_main; + session_main_t *smm = &session_main; u32 session_index, thread_index; session_parse_handle (handle, &session_index, &thread_index); return pool_elt_at_index (smm->wrk[thread_index].sessions, session_index); @@ -249,57 +403,18 @@ session_get_from_handle_if_valid (session_handle_t handle) return session_get_if_valid (session_index, thread_index); } -always_inline u64 -session_segment_handle (session_t * s) -{ - svm_fifo_t *f; - - if (s->session_state == SESSION_STATE_LISTENING) - return SESSION_INVALID_HANDLE; - - f = s->rx_fifo; - return segment_manager_make_segment_handle (f->segment_manager, - f->segment_index); -} - -/** - * Acquires a lock that blocks a session pool from expanding. - * - * This is typically used for safely peeking into other threads' - * pools in order to clone elements. Lock should be dropped as soon - * as possible by calling @ref session_pool_remove_peeker. - * - * NOTE: Avoid using pool_elt_at_index while the lock is held because - * it may lead to free elt bitmap expansion/contraction! - */ -always_inline void -session_pool_add_peeker (u32 thread_index) -{ - session_manager_worker_t *wrk = &session_manager_main.wrk[thread_index]; - if (thread_index == vlib_get_thread_index ()) - return; - clib_rwlock_reader_lock (&wrk->peekers_rw_locks); -} - -always_inline void -session_pool_remove_peeker (u32 thread_index) -{ - session_manager_worker_t *wrk = &session_manager_main.wrk[thread_index]; - if (thread_index == vlib_get_thread_index ()) - return; - clib_rwlock_reader_unlock (&wrk->peekers_rw_locks); -} +u64 session_segment_handle (session_t * s); /** - * Get session from handle and 'lock' pool resize if not in same thread + * Get session from handle and avoid pool validation if no same thread * - * Caller should drop the peek 'lock' as soon as possible. + * Peekers are fine because pool grows with barrier (see @ref session_alloc) */ always_inline session_t * session_get_from_handle_safe (u64 handle) { u32 thread_index = session_thread_from_handle (handle); - session_manager_worker_t *wrk = &session_manager_main.wrk[thread_index]; + session_worker_t *wrk = &session_main.wrk[thread_index]; if (thread_index == vlib_get_thread_index ()) { @@ -308,57 +423,58 @@ session_get_from_handle_safe (u64 handle) } else { - session_pool_add_peeker (thread_index); - /* Don't use pool_elt_at index. See @ref session_pool_add_peeker */ + /* Don't use pool_elt_at index to avoid pool bitmap reallocs */ return wrk->sessions + session_index_from_handle (handle); } } -always_inline u32 -session_get_index (session_t * s) -{ - return (s - session_manager_main.wrk[s->thread_index].sessions); -} - always_inline session_t * session_clone_safe (u32 session_index, u32 thread_index) { + u32 current_thread_index = vlib_get_thread_index (), new_index; session_t *old_s, *new_s; - u32 current_thread_index = vlib_get_thread_index (); - /* If during the memcpy pool is reallocated AND the memory allocator - * decides to give the old chunk of memory to somebody in a hurry to - * scribble something on it, we have a problem. So add this thread as - * a session pool peeker. - */ - session_pool_add_peeker (thread_index); new_s = session_alloc (current_thread_index); - old_s = session_manager_main.wrk[thread_index].sessions + session_index; + new_index = new_s->session_index; + /* Session pools are reallocated with barrier (see @ref session_alloc) */ + old_s = session_main.wrk[thread_index].sessions + session_index; clib_memcpy_fast (new_s, old_s, sizeof (*new_s)); - session_pool_remove_peeker (thread_index); new_s->thread_index = current_thread_index; - new_s->session_index = session_get_index (new_s); + new_s->session_index = new_index; return new_s; } -int session_open (u32 app_index, session_endpoint_t * tep, u32 opaque); +int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh); int session_listen (session_t * s, session_endpoint_cfg_t * sep); int session_stop_listen (session_t * s); +void session_half_close (session_t *s); void session_close (session_t * s); +void session_reset (session_t * s); +void session_transport_half_close (session_t *s); void session_transport_close (session_t * s); +void session_transport_reset (session_t * s); void session_transport_cleanup (session_t * s); int session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type); +int session_enqueue_notify (session_t * s); int session_dequeue_notify (session_t * s); int session_send_io_evt_to_thread_custom (void *data, u32 thread_index, session_evt_type_t evt_type); void session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args); +void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp, + void *rpc_args); +void session_add_self_custom_tx_evt (transport_connection_t * tc, + u8 has_prio); +void sesssion_reschedule_tx (transport_connection_t * tc); transport_connection_t *session_get_transport (session_t * s); +void session_get_endpoint (session_t * s, transport_endpoint_t * tep, + u8 is_lcl); +int session_transport_attribute (session_t *s, u8 is_get, + transport_endpt_attr_t *attr); - -u8 *format_stream_session (u8 * s, va_list * args); -uword unformat_stream_session (unformat_input_t * input, va_list * args); +u8 *format_session (u8 * s, va_list * args); +uword unformat_session (unformat_input_t * input, va_list * args); uword unformat_transport_connection (unformat_input_t * input, va_list * args); @@ -373,55 +489,77 @@ int session_enqueue_dgram_connection (session_t * s, session_dgram_hdr_t * hdr, vlib_buffer_t * b, u8 proto, u8 queue_event); -int stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, - u32 offset, u32 max_bytes); -u32 stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes); - -int session_stream_connect_notify (transport_connection_t * tc, u8 is_fail); +int session_stream_connect_notify (transport_connection_t * tc, + session_error_t err); int session_dgram_connect_notify (transport_connection_t * tc, u32 old_thread_index, session_t ** new_session); -void stream_session_init_fifos_pointers (transport_connection_t * tc, - u32 rx_pointer, u32 tx_pointer); - int session_stream_accept_notify (transport_connection_t * tc); void session_transport_closing_notify (transport_connection_t * tc); void session_transport_delete_notify (transport_connection_t * tc); +void session_half_open_delete_notify (transport_connection_t *tc); +void session_half_open_migrate_notify (transport_connection_t *tc); +int session_half_open_migrated_notify (transport_connection_t *tc); void session_transport_closed_notify (transport_connection_t * tc); void session_transport_reset_notify (transport_connection_t * tc); int session_stream_accept (transport_connection_t * tc, u32 listener_index, - u8 notify); -u32 session_tx_fifo_max_dequeue (transport_connection_t * tc); + u32 thread_index, u8 notify); +int session_dgram_accept (transport_connection_t * tc, u32 listener_index, + u32 thread_index); +/** + * Initialize session layer for given transport proto and ip version + * + * Allocates per session type (transport proto + ip version) data structures + * and adds arc from session queue node to session type output node. + * + * @param transport_proto transport proto to be registered + * @param vft virtual function table for transport + * @param is_ip4 flag that indicates if transports uses ipv4 + * as underlying network layer + * @param output_node output node for transport + */ void session_register_transport (transport_proto_t transport_proto, const transport_proto_vft_t * vft, u8 is_ip4, u32 output_node); +transport_proto_t session_add_transport_proto (void); +void session_register_update_time_fn (session_update_time_fn fn, u8 is_add); +int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer, + u32 offset, u32 max_bytes); +u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes); always_inline u32 transport_max_rx_enqueue (transport_connection_t * tc) { session_t *s = session_get (tc->s_index, tc->thread_index); - return svm_fifo_max_enqueue (s->rx_fifo); + return svm_fifo_max_enqueue_prod (s->rx_fifo); } always_inline u32 transport_max_tx_dequeue (transport_connection_t * tc) { session_t *s = session_get (tc->s_index, tc->thread_index); - return svm_fifo_max_dequeue (s->tx_fifo); + return svm_fifo_max_dequeue_cons (s->tx_fifo); +} + +always_inline u32 +transport_max_rx_dequeue (transport_connection_t * tc) +{ + session_t *s = session_get (tc->s_index, tc->thread_index); + return svm_fifo_max_dequeue (s->rx_fifo); } always_inline u32 transport_rx_fifo_size (transport_connection_t * tc) { session_t *s = session_get (tc->s_index, tc->thread_index); - return s->rx_fifo->nitems; + return svm_fifo_size (s->rx_fifo); } always_inline u32 transport_tx_fifo_size (transport_connection_t * tc) { session_t *s = session_get (tc->s_index, tc->thread_index); - return s->tx_fifo->nitems; + return svm_fifo_size (s->tx_fifo); } always_inline u8 @@ -431,16 +569,29 @@ transport_rx_fifo_has_ooo_data (transport_connection_t * tc) return svm_fifo_has_ooo_data (s->rx_fifo); } -always_inline f64 -transport_dispatch_period (u32 thread_index) +always_inline void +transport_rx_fifo_req_deq_ntf (transport_connection_t *tc) { - return session_manager_main.wrk[thread_index].dispatch_period; + session_t *s = session_get (tc->s_index, tc->thread_index); + svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF); } -always_inline f64 +always_inline clib_time_type_t transport_time_now (u32 thread_index) { - return session_manager_main.wrk[thread_index].last_vlib_time; + return session_main.wrk[thread_index].last_vlib_time; +} + +always_inline clib_us_time_t +transport_us_time_now (u32 thread_index) +{ + return session_main.wrk[thread_index].last_vlib_us_time; +} + +always_inline clib_time_type_t +transport_seconds_per_loop (u32 thread_index) +{ + return session_main.wrk[thread_index].vm->seconds_per_loop; } always_inline void @@ -449,7 +600,13 @@ transport_add_tx_event (transport_connection_t * tc) session_t *s = session_get (tc->s_index, tc->thread_index); if (svm_fifo_has_event (s->tx_fifo)) return; - session_send_io_evt_to_thread (s->tx_fifo, FIFO_EVENT_APP_TX); + session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX); +} + +always_inline u32 +transport_cl_thread (void) +{ + return session_main.transport_cl_thread; } /* @@ -459,7 +616,8 @@ transport_add_tx_event (transport_connection_t * tc) always_inline u64 listen_session_get_handle (session_t * s) { - ASSERT (s->session_state == SESSION_STATE_LISTENING); + ASSERT (s->session_state == SESSION_STATE_LISTENING || + session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC); return session_handle (s); } @@ -477,7 +635,7 @@ listen_session_parse_handle (session_handle_t handle, u32 * index, } always_inline session_t * -listen_session_new (u8 thread_index, session_type_t type) +listen_session_alloc (u8 thread_index, session_type_t type) { session_t *s; s = session_alloc (thread_index); @@ -487,63 +645,232 @@ listen_session_new (u8 thread_index, session_type_t type) } always_inline session_t * -listen_session_get (u32 index) +listen_session_get (u32 ls_index) { - return session_get (index, 0); + return session_get (ls_index, 0); } always_inline void -listen_session_del (session_t * s) +listen_session_free (session_t * s) { + ASSERT (!s->rx_fifo); session_free (s); } -transport_connection_t *listen_session_get_transport (session_t * s); +always_inline session_t * +ho_session_alloc (void) +{ + session_t *s; + ASSERT (vlib_get_thread_index () == 0); + s = session_alloc (0); + s->session_state = SESSION_STATE_CONNECTING; + s->flags |= SESSION_F_HALF_OPEN; + /* Not ideal. Half-opens are only allocated from main with worker barrier + * but can be cleaned up, i.e., session_half_open_free, from main without + * a barrier. In debug images, the free_bitmap can grow while workers peek + * the sessions pool, e.g., session_half_open_migrate_notify, and as a + * result crash while validating the session. To avoid this, grow the bitmap + * now. */ + if (CLIB_DEBUG) + { + session_t *sp = session_main.wrk[0].sessions; + clib_bitmap_validate (pool_header (sp)->free_bitmap, s->session_index); + } + return s; +} -int -listen_session_get_local_session_endpoint (session_t * listener, - session_endpoint_t * sep); +always_inline session_t * +ho_session_get (u32 ho_index) +{ + return session_get (ho_index, 0 /* half-open thread */); +} + +always_inline void +ho_session_free (session_t *s) +{ + ASSERT (!s->rx_fifo && s->thread_index == 0); + session_free (s); +} + +transport_connection_t *listen_session_get_transport (session_t * s); /* - * Session manager functions + * Session layer functions */ -always_inline session_manager_main_t * -vnet_get_session_manager_main () +always_inline session_main_t * +vnet_get_session_main () +{ + return &session_main; +} + +always_inline session_worker_t * +session_main_get_worker (u32 thread_index) { - return &session_manager_main; + return &session_main.wrk[thread_index]; } -always_inline session_manager_worker_t * -session_manager_get_worker (u32 thread_index) +static inline session_worker_t * +session_main_get_worker_if_valid (u32 thread_index) { - return &session_manager_main.wrk[thread_index]; + if (thread_index > vec_len (session_main.wrk)) + return 0; + return &session_main.wrk[thread_index]; } always_inline svm_msg_q_t * -session_manager_get_vpp_event_queue (u32 thread_index) +session_main_get_vpp_event_queue (u32 thread_index) { - return session_manager_main.wrk[thread_index].vpp_event_queue; + return session_main.wrk[thread_index].vpp_event_queue; } always_inline u8 -session_manager_is_enabled () +session_main_is_enabled () { - return session_manager_main.is_enabled == 1; + return session_main.is_enabled == 1; } #define session_cli_return_if_not_enabled() \ do { \ - if (!session_manager_main.is_enabled) \ - return clib_error_return(0, "session layer is not enabled"); \ + if (!session_main.is_enabled) \ + return clib_error_return (0, "session layer is not enabled"); \ } while (0) -int session_manager_flush_enqueue_events (u8 proto, u32 thread_index); -int session_manager_flush_all_enqueue_events (u8 transport_proto); -void session_flush_frames_main_thread (vlib_main_t * vm); -ssvm_private_t *session_manager_get_evt_q_segment (void); +int session_main_flush_enqueue_events (u8 proto, u32 thread_index); +int session_main_flush_all_enqueue_events (u8 transport_proto); +void session_queue_run_on_main_thread (vlib_main_t * vm); + +/** + * Add session node pending buffer with custom node + * + * @param thread_index worker thread expected to send the buffer + * @param bi buffer index + * @param next_node next node edge index for buffer. Edge to next node + * must exist + */ +always_inline void +session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node) +{ + session_worker_t *wrk = session_main_get_worker (thread_index); + vec_add1 (wrk->pending_tx_buffers, bi); + vec_add1 (wrk->pending_tx_nexts, next_node); + if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT)) + vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index); +} + +always_inline void +session_wrk_update_time (session_worker_t *wrk, f64 now) +{ + wrk->last_vlib_time = now; + wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ; +} + +void session_wrk_enable_adaptive_mode (session_worker_t *wrk); +fifo_segment_t *session_main_get_wrk_mqs_segment (void); void session_node_enable_disable (u8 is_en); clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en); +void session_wrk_handle_evts_main_rpc (void *); + +session_t *session_alloc_for_connection (transport_connection_t * tc); +session_t *session_alloc_for_half_open (transport_connection_t *tc); + +typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args); + +typedef struct +{ + u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4]; + u32 flag; +} pool_safe_realloc_header_t; + +STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t)); + +#define POOL_REALLOC_SAFE_ELT_THRESH 32 + +#define pool_realloc_flag(PH) \ + ((pool_safe_realloc_header_t *) pool_header (PH))->flag + +typedef struct pool_realloc_rpc_args_ +{ + void **pool; + uword elt_size; + uword align; +} pool_realloc_rpc_args_t; + +always_inline void +pool_program_safe_realloc_rpc (void *args) +{ + vlib_main_t *vm = vlib_get_main (); + u32 free_elts, max_elts, n_alloc; + pool_realloc_rpc_args_t *pra; + + ASSERT (vlib_get_thread_index () == 0); + pra = (pool_realloc_rpc_args_t *) args; + + vlib_worker_thread_barrier_sync (vm); + + free_elts = _pool_free_elts (*pra->pool, pra->elt_size); + if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH) + { + max_elts = _vec_max_len (*pra->pool, pra->elt_size); + n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH); + _pool_alloc (pra->pool, free_elts + n_alloc, pra->align, 0, + pra->elt_size); + } + pool_realloc_flag (*pra->pool) = 0; + clib_mem_free (args); + + vlib_worker_thread_barrier_release (vm); +} + +always_inline void +pool_program_safe_realloc (void **p, u32 elt_size, u32 align) +{ + pool_realloc_rpc_args_t *pra; + + /* Reuse pad as a realloc flag */ + if (pool_realloc_flag (*p)) + return; + + pra = clib_mem_alloc (sizeof (*pra)); + pra->pool = p; + pra->elt_size = elt_size; + pra->align = align; + pool_realloc_flag (*p) = 1; + + session_send_rpc_evt_to_thread (0 /* thread index */, + pool_program_safe_realloc_rpc, pra); +} + +#define pool_needs_realloc(P) \ + ((!P) || \ + (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \ + pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH)) + +#define pool_get_aligned_safe(P, E, align) \ + do \ + { \ + if (PREDICT_FALSE (pool_needs_realloc (P))) \ + { \ + if (PREDICT_FALSE (!(P))) \ + { \ + pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \ + } \ + else if (PREDICT_FALSE (!pool_free_elts (P))) \ + { \ + vlib_workers_sync (); \ + pool_alloc_aligned (P, pool_max_len (P), align); \ + vlib_workers_continue (); \ + ALWAYS_ASSERT (pool_free_elts (P) > 0); \ + } \ + else \ + { \ + pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \ + _vec_align (P, align)); \ + } \ + } \ + pool_get_aligned (P, E, align); \ + } \ + while (0) #endif /* __included_session_h__ */