X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fsession.h;h=4fa9194077eccb463356ac951cc743451528e65e;hb=dd298e804a25dbebc9e284b3b2d0dfd9bf674ad8;hp=cf1b3e99f4defd5d4d321166c990da36e5292c51;hpb=30e79c2e388a98160a3660f4f03103890c9b1b7c;p=vpp.git diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h index cf1b3e99f4d..4fa9194077e 100644 --- a/src/vnet/session/session.h +++ b/src/vnet/session/session.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017 Cisco and/or its affiliates. + * Copyright (c) 2017-2019 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: @@ -15,72 +15,13 @@ #ifndef __included_session_h__ #define __included_session_h__ -#include +#include +#include #include -#include #include -#include -#include - -#define HALF_OPEN_LOOKUP_INVALID_VALUE ((u64)~0) -#define INVALID_INDEX ((u32)~0) -#define SESSION_PROXY_LISTENER_INDEX ((u8)~0 - 1) -#define SESSION_LOCAL_HANDLE_PREFIX 0x7FFFFFFF - -/* TODO decide how much since we have pre-data as well */ -#define MAX_HDRS_LEN 100 /* Max number of bytes for headers */ - -typedef enum -{ - FIFO_EVENT_APP_RX, - SESSION_IO_EVT_CT_RX, - FIFO_EVENT_APP_TX, - SESSION_IO_EVT_CT_TX, - SESSION_IO_EVT_TX_FLUSH, - FIFO_EVENT_DISCONNECT, - FIFO_EVENT_BUILTIN_RX, - FIFO_EVENT_BUILTIN_TX, - FIFO_EVENT_RPC, - SESSION_CTRL_EVT_BOUND, - SESSION_CTRL_EVT_ACCEPTED, - SESSION_CTRL_EVT_ACCEPTED_REPLY, - SESSION_CTRL_EVT_CONNECTED, - SESSION_CTRL_EVT_CONNECTED_REPLY, - SESSION_CTRL_EVT_DISCONNECTED, - SESSION_CTRL_EVT_DISCONNECTED_REPLY, - SESSION_CTRL_EVT_RESET, - SESSION_CTRL_EVT_RESET_REPLY, - SESSION_CTRL_EVT_REQ_WORKER_UPDATE, - SESSION_CTRL_EVT_WORKER_UPDATE, - SESSION_CTRL_EVT_WORKER_UPDATE_REPLY, -} session_evt_type_t; - -static inline const char * -fifo_event_type_str (session_evt_type_t et) -{ - switch (et) - { - case FIFO_EVENT_APP_RX: - return "FIFO_EVENT_APP_RX"; - case FIFO_EVENT_APP_TX: - return "FIFO_EVENT_APP_TX"; - case FIFO_EVENT_DISCONNECT: - return "FIFO_EVENT_DISCONNECT"; - case FIFO_EVENT_BUILTIN_RX: - return "FIFO_EVENT_BUILTIN_RX"; - case FIFO_EVENT_RPC: - return "FIFO_EVENT_RPC"; - default: - return "UNKNOWN FIFO EVENT"; - } -} - -typedef enum -{ - SESSION_MQ_IO_EVT_RING, - SESSION_MQ_CTRL_EVT_RING, - SESSION_MQ_N_RINGS -} session_mq_rings_e; +#include +#include +#include #define foreach_session_input_error \ _(NO_SESSION, "No session drops") \ @@ -90,9 +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 { @@ -100,150 +38,168 @@ typedef enum foreach_session_input_error #undef _ SESSION_N_ERROR, -} session_error_t; - -typedef struct -{ - void *fp; - void *arg; -} session_rpc_args_t; - -typedef u64 session_handle_t; - -/* *INDENT-OFF* */ -typedef struct -{ - u8 event_type; - u8 postponed; - union - { - svm_fifo_t *fifo; - session_handle_t session_handle; - session_rpc_args_t rpc_args; - struct - { - u8 data[0]; - }; - }; -} __clib_packed session_event_t; -/* *INDENT-ON* */ - -#define SESSION_MSG_NULL { } - -typedef struct session_dgram_pre_hdr_ -{ - u32 data_length; - u32 data_offset; -} session_dgram_pre_hdr_t; - -/* *INDENT-OFF* */ -typedef CLIB_PACKED (struct session_dgram_header_ -{ - u32 data_length; - u32 data_offset; - ip46_address_t rmt_ip; - ip46_address_t lcl_ip; - u16 rmt_port; - u16 lcl_port; - u8 is_ip4; -}) session_dgram_hdr_t; -/* *INDENT-ON* */ - -#define SESSION_CONN_ID_LEN 37 -#define SESSION_CONN_HDR_LEN 45 - -STATIC_ASSERT (sizeof (session_dgram_hdr_t) == (SESSION_CONN_ID_LEN + 8), - "session conn id wrong length"); +} session_input_error_t; typedef struct session_tx_context_ { CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); - stream_session_t *s; + 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; -/* Forward definition */ -typedef struct _session_manager_main session_manager_main_t; +typedef struct session_evt_elt +{ + clib_llist_anchor_t evt_list; + session_event_t evt; +} session_evt_elt_t; -typedef int - (session_fifo_rx_fn) (vlib_main_t * vm, vlib_node_runtime_t * node, - session_event_t * e0, stream_session_t * s0, - int *n_tx_pkts); +typedef struct session_ctrl_evt_data_ +{ + u8 data[SESSION_CTRL_MSG_MAX_SIZE]; +} session_evt_ctrl_data_t; -extern session_fifo_rx_fn session_tx_fifo_peek_and_snd; -extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd; -extern session_fifo_rx_fn session_tx_fifo_dequeue_internal; +typedef enum session_wrk_state_ +{ + SESSION_WRK_POLLING, + SESSION_WRK_INTERRUPT, + SESSION_WRK_IDLE, +} __clib_packed session_wrk_state_t; -u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e); +typedef enum session_wrk_flags_ +{ + SESSION_WRK_F_ADAPTIVE = 1 << 0, +} __clib_packed session_wrk_flag_t; -typedef struct session_manager_worker_ +#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); /** Worker session pool */ - stream_session_t *sessions; + session_t *sessions; /** 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; - /** Vector of partially read events */ - session_event_t *free_event_vector; + /** Head of control events list */ + clib_llist_index_t ctrl_head; - /** Vector of active event vectors */ - session_event_t *pending_event_vector; + /** Head of list of elements */ + clib_llist_index_t new_head; - /** Vector of postponed disconnects */ - session_event_t *pending_disconnects; + /** Head of list of pending events */ + clib_llist_index_t old_head; - /** Vector of postponed events */ - session_event_t *postponed_event_vector; + /** Vector of buffers to be sent */ + u32 *pending_tx_buffers; - /** Peekers rw lock */ - clib_rwlock_t peekers_rw_locks; + /** Vector of nexts for the pending tx buffers */ + u16 *pending_tx_nexts; - u32 last_tx_packets; + /** Clib file for timerfd. Used only if adaptive mode is on */ + uword timerfd_file; -} session_manager_worker_t; + /** List of pending connects for first worker */ + clib_llist_index_t pending_connects; -struct _session_manager_main + /** Flag that is set if main thread signaled to handle connects */ + u32 n_pending_connects; + + /** Main thread loops in poll mode without a connect */ + u32 no_connect_loops; + + /** 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_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; +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 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; + + /** Vector of transport update time functions */ + session_update_time_fn *update_time_fns; - /** Event queues memfd segment initialized only if so configured */ - ssvm_private_t evt_qs_segment; + /** Event queues memfd segment */ + fifo_segment_t wrk_mqs_segment; /** Unique segment name counter */ u32 unique_segment_name_counter; @@ -256,6 +212,20 @@ 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 */ @@ -263,14 +233,29 @@ 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; - u32 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; @@ -289,218 +274,147 @@ 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; -}; - -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 - -/* - * Session manager function - */ -always_inline session_manager_main_t * -vnet_get_session_manager_main () +typedef enum session_q_process_evt_ { - return &session_manager_main; -} + SESSION_Q_PROCESS_RUN_ON_MAIN = 1, + SESSION_Q_PROCESS_STOP +} session_q_process_evt_t; -always_inline session_manager_worker_t * -session_manager_get_worker (u32 thread_index) -{ - return &session_manager_main.wrk[thread_index]; -} +#define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1) +#define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1) -always_inline u8 -stream_session_is_valid (u32 si, u8 thread_index) -{ - stream_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; -} - -stream_session_t *session_alloc (u32 thread_index); -int session_alloc_fifos (segment_manager_t * sm, stream_session_t * s); -void session_free (stream_session_t * s); -void session_free_w_fifos (stream_session_t * s); - -always_inline stream_session_t * -session_get (u32 si, u32 thread_index) +static inline void +session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt) { - ASSERT (stream_session_is_valid (si, thread_index)); - return pool_elt_at_index (session_manager_main.wrk[thread_index].sessions, - si); + clib_llist_add_tail (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->old_head)); } -always_inline stream_session_t * -session_get_if_valid (u64 si, u32 thread_index) +static inline void +session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt) { - if (thread_index >= vec_len (session_manager_main.wrk)) - return 0; - - if (pool_is_free_index (session_manager_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); + clib_llist_add (wrk->event_elts, evt_list, elt, + clib_llist_elt (wrk->event_elts, wrk->old_head)); } -always_inline session_handle_t -session_handle (stream_session_t * s) -{ - return ((u64) s->thread_index << 32) | (u64) s->session_index; -} -always_inline u32 -session_index_from_handle (session_handle_t handle) +static inline u32 +session_evt_ctrl_data_alloc (session_worker_t * wrk) { - return handle & 0xFFFFFFFF; + session_evt_ctrl_data_t *data; + pool_get (wrk->ctrl_evts_data, data); + return (data - wrk->ctrl_evts_data); } -always_inline u32 -session_thread_from_handle (session_handle_t handle) +static inline session_evt_elt_t * +session_evt_alloc_ctrl (session_worker_t * wrk) { - return handle >> 32; + 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; } -always_inline void -session_parse_handle (session_handle_t handle, u32 * index, - u32 * thread_index) +static inline void * +session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt) { - *index = session_index_from_handle (handle); - *thread_index = session_thread_from_handle (handle); + return (void *) (pool_elt_at_index (wrk->ctrl_evts_data, + elt->evt.ctrl_data_index)); } -always_inline stream_session_t * -session_get_from_handle (session_handle_t handle) +static inline void +session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt) { - session_manager_main_t *smm = &session_manager_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); + ASSERT (elt->evt.event_type > SESSION_IO_EVT_BUILTIN_TX); + pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index); } -always_inline stream_session_t * -session_get_from_handle_if_valid (session_handle_t handle) +static inline session_evt_elt_t * +session_evt_alloc_new (session_worker_t * wrk) { - u32 session_index, thread_index; - session_parse_handle (handle, &session_index, &thread_index); - return session_get_if_valid (session_index, thread_index); + 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; } -always_inline u8 -session_handle_is_local (session_handle_t handle) +static inline session_evt_elt_t * +session_evt_alloc_old (session_worker_t * wrk) { - if ((handle >> 32) == SESSION_LOCAL_HANDLE_PREFIX) - return 1; - return 0; + 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; } -always_inline transport_proto_t -session_type_transport_proto (session_type_t st) -{ - return (st >> 1); -} +int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq); -always_inline u8 -session_type_is_ip4 (session_type_t st) -{ - return (st & 1); -} +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 transport_proto_t -session_get_transport_proto (stream_session_t * s) +always_inline session_t * +session_get (u32 si, u32 thread_index) { - return (s->session_type >> 1); + ASSERT (session_is_valid (si, thread_index)); + return pool_elt_at_index (session_main.wrk[thread_index].sessions, si); } -always_inline fib_protocol_t -session_get_fib_proto (stream_session_t * s) +always_inline session_t * +session_get_if_valid (u64 si, u32 thread_index) { - u8 is_ip4 = s->session_type & 1; - return (is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6); -} + if (thread_index >= vec_len (session_main.wrk)) + return 0; -always_inline session_type_t -session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4) -{ - return (proto << 1 | is_ip4); -} + if (pool_is_free_index (session_main.wrk[thread_index].sessions, si)) + return 0; -always_inline u64 -session_segment_handle (stream_session_t * s) -{ - svm_fifo_t *f = s->server_rx_fifo; - return segment_manager_make_segment_handle (f->segment_manager, - f->segment_index); + ASSERT (session_is_valid (si, thread_index)); + return pool_elt_at_index (session_main.wrk[thread_index].sessions, si); } -always_inline u8 -session_has_transport (stream_session_t * s) +always_inline session_t * +session_get_from_handle (session_handle_t handle) { - return (session_get_transport_proto (s) != TRANSPORT_PROTO_NONE); + 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); } -transport_service_type_t session_transport_service_type (stream_session_t *); -transport_tx_fn_type_t session_transport_tx_fn_type (stream_session_t *); -u8 session_tx_is_dgram (stream_session_t * s); - -/** - * 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) +always_inline session_t * +session_get_from_handle_if_valid (session_handle_t handle) { - 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); + u32 session_index, thread_index; + session_parse_handle (handle, &session_index, &thread_index); + return session_get_if_valid (session_index, thread_index); } -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 stream_session_t * +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 ()) { @@ -509,169 +423,205 @@ 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 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; + + new_s = session_alloc (current_thread_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)); + new_s->thread_index = current_thread_index; + new_s->session_index = new_index; + return new_s; +} + +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_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); + +/* + * Interface to transport protos + */ + +int session_enqueue_stream_connection (transport_connection_t * tc, + vlib_buffer_t * b, u32 offset, + u8 queue_event, u8 is_in_order); +int session_enqueue_dgram_connection (session_t * s, + session_dgram_hdr_t * hdr, + vlib_buffer_t * b, u8 proto, + u8 queue_event); +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); +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, + 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) { - stream_session_t *s = session_get (tc->s_index, tc->thread_index); - return svm_fifo_max_enqueue (s->server_rx_fifo); + session_t *s = session_get (tc->s_index, tc->thread_index); + return svm_fifo_max_enqueue_prod (s->rx_fifo); } always_inline u32 transport_max_tx_dequeue (transport_connection_t * tc) { - stream_session_t *s = session_get (tc->s_index, tc->thread_index); - return svm_fifo_max_dequeue (s->server_tx_fifo); + session_t *s = session_get (tc->s_index, tc->thread_index); + 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) { - stream_session_t *s = session_get (tc->s_index, tc->thread_index); - return s->server_rx_fifo->nitems; + session_t *s = session_get (tc->s_index, tc->thread_index); + return svm_fifo_size (s->rx_fifo); } always_inline u32 transport_tx_fifo_size (transport_connection_t * tc) { - stream_session_t *s = session_get (tc->s_index, tc->thread_index); - return s->server_tx_fifo->nitems; + session_t *s = session_get (tc->s_index, tc->thread_index); + return svm_fifo_size (s->tx_fifo); } always_inline u8 transport_rx_fifo_has_ooo_data (transport_connection_t * tc) { - stream_session_t *s = session_get (tc->c_index, tc->thread_index); - return svm_fifo_has_ooo_data (s->server_rx_fifo); + session_t *s = session_get (tc->c_index, tc->thread_index); + 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 u32 -session_get_index (stream_session_t * s) +always_inline clib_us_time_t +transport_us_time_now (u32 thread_index) { - return (s - session_manager_main.wrk[s->thread_index].sessions); + return session_main.wrk[thread_index].last_vlib_us_time; } -always_inline stream_session_t * -session_clone_safe (u32 session_index, u32 thread_index) +always_inline clib_time_type_t +transport_seconds_per_loop (u32 thread_index) { - stream_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; - 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); - return new_s; + return session_main.wrk[thread_index].vm->seconds_per_loop; } -transport_connection_t *session_get_transport (stream_session_t * s); - -u32 session_tx_fifo_max_dequeue (transport_connection_t * tc); - -int -session_enqueue_stream_connection (transport_connection_t * tc, - vlib_buffer_t * b, u32 offset, - u8 queue_event, u8 is_in_order); -int session_enqueue_dgram_connection (stream_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_dgram_connect_notify (transport_connection_t * tc, - u32 old_thread_index, - stream_session_t ** new_session); -int session_dequeue_notify (stream_session_t * s); -void stream_session_init_fifos_pointers (transport_connection_t * tc, - u32 rx_pointer, u32 tx_pointer); - -int stream_session_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_transport_closed_notify (transport_connection_t * tc); -void session_transport_reset_notify (transport_connection_t * tc); -int stream_session_accept (transport_connection_t * tc, u32 listener_index, - u8 notify); -int session_open (u32 app_index, session_endpoint_t * tep, u32 opaque); -int session_listen (stream_session_t * s, session_endpoint_cfg_t * sep); -int session_stop_listen (stream_session_t * s); -void session_close (stream_session_t * s); -void session_transport_close (stream_session_t * s); -void session_transport_cleanup (stream_session_t * s); -int session_send_io_evt_to_thread (svm_fifo_t * f, - session_evt_type_t evt_type); -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); - -ssvm_private_t *session_manager_get_evt_q_segment (void); - -u8 *format_stream_session (u8 * s, va_list * args); -uword unformat_stream_session (unformat_input_t * input, va_list * args); -uword unformat_transport_connection (unformat_input_t * input, - va_list * args); - -void session_register_transport (transport_proto_t transport_proto, - const transport_proto_vft_t * vft, u8 is_ip4, - u32 output_node); - always_inline void transport_add_tx_event (transport_connection_t * tc) { - stream_session_t *s = session_get (tc->s_index, tc->thread_index); - if (svm_fifo_has_event (s->server_tx_fifo)) + 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->server_tx_fifo, FIFO_EVENT_APP_TX); + session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX); } -clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en); - -always_inline svm_msg_q_t * -session_manager_get_vpp_event_queue (u32 thread_index) +always_inline u32 +transport_cl_thread (void) { - return session_manager_main.wrk[thread_index].vpp_event_queue; + return session_main.transport_cl_thread; } -int session_manager_flush_enqueue_events (u8 proto, u32 thread_index); -int session_manager_flush_all_enqueue_events (u8 transport_proto); +/* + * Listen sessions + */ always_inline u64 -listen_session_get_handle (stream_session_t * s) +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); } -always_inline stream_session_t * +always_inline session_t * listen_session_get_from_handle (session_handle_t handle) { return session_get_from_handle (handle); @@ -684,49 +634,243 @@ listen_session_parse_handle (session_handle_t handle, u32 * index, session_parse_handle (handle, index, thread_index); } -always_inline stream_session_t * -listen_session_new (u8 thread_index, session_type_t type) +always_inline session_t * +listen_session_alloc (u8 thread_index, session_type_t type) { - stream_session_t *s; + session_t *s; s = session_alloc (thread_index); s->session_type = type; s->session_state = SESSION_STATE_LISTENING; return s; } -always_inline stream_session_t * -listen_session_get (u32 index) +always_inline session_t * +listen_session_get (u32 ls_index) { - return session_get (index, 0); + return session_get (ls_index, 0); } always_inline void -listen_session_del (stream_session_t * s) +listen_session_free (session_t * s) { + ASSERT (!s->rx_fifo); session_free (s); } -transport_connection_t *listen_session_get_transport (stream_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 (stream_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 */); +} -void session_flush_frames_main_thread (vlib_main_t * vm); +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 layer functions + */ + +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_main.wrk[thread_index]; +} + +static inline session_worker_t * +session_main_get_worker_if_valid (u32 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_main_get_vpp_event_queue (u32 thread_index) +{ + 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_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__ */