/*
- * 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:
#ifndef __included_session_h__
#define __included_session_h__
-#include <vnet/session/transport.h>
-#include <vlibmemory/unix_shared_memory_queue.h>
+#include <vppinfra/llist.h>
+#include <vnet/session/session_types.h>
+#include <vnet/session/session_lookup.h>
#include <vnet/session/session_debug.h>
-#include <vnet/session/segment_manager.h>
-
-#define HALF_OPEN_LOOKUP_INVALID_VALUE ((u64)~0)
-#define INVALID_INDEX ((u32)~0)
-
-/* 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,
- FIFO_EVENT_APP_TX,
- FIFO_EVENT_TIMEOUT,
- FIFO_EVENT_DISCONNECT,
- FIFO_EVENT_BUILTIN_RX,
- FIFO_EVENT_RPC,
-} fifo_event_type_t;
-
-#define foreach_session_input_error \
-_(NO_SESSION, "No session drops") \
-_(NO_LISTENER, "No listener for dst port drops") \
-_(ENQUEUED, "Packets pushed into rx fifo") \
-_(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")
-
-typedef enum
-{
-#define _(sym,str) SESSION_ERROR_##sym,
- foreach_session_input_error
-#undef _
- SESSION_N_ERROR,
-} session_error_t;
-
-/* Event queue input node static next indices */
-typedef enum
-{
- SESSION_QUEUE_NEXT_DROP,
- SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT,
- SESSION_QUEUE_NEXT_IP4_LOOKUP,
- SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT,
- SESSION_QUEUE_NEXT_IP6_LOOKUP,
- SESSION_QUEUE_N_NEXT,
-} session_queue_next_t;
-
-#define foreach_session_type \
- _(IP4_TCP, ip4_tcp) \
- _(IP4_UDP, ip4_udp) \
- _(IP6_TCP, ip6_tcp) \
- _(IP6_UDP, ip6_udp)
-
-typedef enum
-{
-#define _(A, a) SESSION_TYPE_##A,
- foreach_session_type
-#undef _
- SESSION_N_TYPES,
-} session_type_t;
+#include <svm/message_queue.h>
+#include <svm/fifo_segment.h>
+#include <vlib/dma/dma.h>
-/*
- * Application session state
- */
-typedef enum
+typedef struct session_wrk_stats_
{
- SESSION_STATE_LISTENING,
- SESSION_STATE_CONNECTING,
- SESSION_STATE_READY,
- SESSION_STATE_CLOSED,
- SESSION_STATE_N_STATES,
-} stream_session_state_t;
+ u32 errors[SESSION_N_ERRORS];
+} session_wrk_stats_t;
-typedef struct
+typedef struct session_tx_context_
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+ session_t *s;
+ transport_proto_vft_t *transport_vft;
+ transport_connection_t *tc;
+ transport_send_params_t sp;
+ u32 max_dequeue;
+ u32 left_to_snd;
+ u32 max_len_to_snd;
+ u16 deq_per_first_buf;
+ u16 deq_per_buf;
+ 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_evt_elt
{
- void *fp;
- void *arg;
-} rpc_args_t;
+ clib_llist_anchor_t evt_list;
+ session_event_t evt;
+} session_evt_elt_t;
-/* *INDENT-OFF* */
-typedef CLIB_PACKED (struct {
- union
- {
- svm_fifo_t * fifo;
- u64 session_handle;
- rpc_args_t rpc_args;
- };
- u8 event_type;
- u16 event_id;
-}) session_fifo_event_t;
-/* *INDENT-ON* */
+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 struct _stream_session_t
+typedef enum session_wrk_flags_
{
- /** fifo pointers. Once allocated, these do not move */
- svm_fifo_t *server_rx_fifo;
- svm_fifo_t *server_tx_fifo;
+ SESSION_WRK_F_ADAPTIVE = 1 << 0,
+} __clib_packed session_wrk_flag_t;
- /** Type */
- u8 session_type;
+#define DMA_TRANS_SIZE 1024
+typedef struct
+{
+ u32 *pending_tx_buffers;
+ u16 *pending_tx_nexts;
+} session_dma_transfer;
- /** State */
- u8 session_state;
+typedef struct session_worker_
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
- u8 thread_index;
+ /** Worker session pool */
+ session_t *sessions;
- /** used during unbind processing */
- u8 is_deleted;
+ /** vpp event message queue for worker */
+ svm_msg_q_t *vpp_event_queue;
- /** To avoid n**2 "one event per frame" check */
- u8 enqueue_epoch;
+ /** vlib_time_now last time around the track */
+ clib_time_type_t last_vlib_time;
- /** Pad to a multiple of 8 octets */
- u8 align_pad[2];
+ /** vlib_time_now rounded to us precision and as u64 */
+ clib_us_time_t last_vlib_us_time;
- /** svm segment index where fifos were allocated */
- u32 svm_segment_index;
+ /** Convenience pointer to this worker's vlib_main */
+ vlib_main_t *vm;
- /** Session index in per_thread pool */
- u32 session_index;
+ /** Per-proto vector of session handles to enqueue */
+ session_handle_t **session_to_enqueue;
- /** Transport specific */
- u32 connection_index;
+ /** Timerfd used to periodically signal wrk session queue node */
+ int timerfd;
- /** Application specific */
- u32 pid;
+ /** Worker flags */
+ session_wrk_flag_t flags;
- /** stream server pool index */
- u32 app_index;
+ /** Worker state */
+ session_wrk_state_t state;
- /** Parent listener session if the result of an accept */
- u32 listener_index;
+ /** Context for session tx */
+ session_tx_context_t ctx;
- /** Opaque, pad to a 64-octet boundary */
- u64 opaque[2];
-} stream_session_t;
+ /** Pool of session event list elements */
+ session_evt_elt_t *event_elts;
-/* Forward definition */
-typedef struct _session_manager_main session_manager_main_t;
+ /** Pool of ctrl events data buffers */
+ session_evt_ctrl_data_t *ctrl_evts_data;
-typedef int
- (session_fifo_rx_fn) (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm,
- session_fifo_event_t * e0, stream_session_t * s0,
- u32 thread_index, int *n_tx_pkts);
+ /** Head of control events list */
+ clib_llist_index_t ctrl_head;
-extern session_fifo_rx_fn session_tx_fifo_peek_and_snd;
-extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd;
+ /** Head of list of elements */
+ clib_llist_index_t new_head;
-struct _session_manager_main
-{
- /** Lookup tables for established sessions and listeners */
- clib_bihash_16_8_t v4_session_hash;
- clib_bihash_48_8_t v6_session_hash;
+ /** Head of list of pending events */
+ clib_llist_index_t old_head;
- /** Lookup tables for half-open sessions */
- clib_bihash_16_8_t v4_half_open_hash;
- clib_bihash_48_8_t v6_half_open_hash;
+ /** Vector of buffers to be sent */
+ u32 *pending_tx_buffers;
- /** Per worker thread session pools */
- stream_session_t **sessions;
+ /** Vector of nexts for the pending tx buffers */
+ u16 *pending_tx_nexts;
- /** Pool of listen sessions. Same type as stream sessions to ease lookups */
- stream_session_t *listen_sessions[SESSION_N_TYPES];
+ /** Clib file for timerfd. Used only if adaptive mode is on */
+ uword timerfd_file;
- /** Sparse vector to map dst port to stream server */
- u16 *stream_server_by_dst_port[SESSION_N_TYPES];
+ /** List of pending connects for first worker */
+ clib_llist_index_t pending_connects;
- /** per-worker enqueue epoch counters */
- u8 *current_enqueue_epoch;
+ /** Flag that is set if main thread signaled to handle connects */
+ u32 n_pending_connects;
- /** Per-worker thread vector of sessions to enqueue */
- u32 **session_indices_to_enqueue_by_thread;
+ /** List head for first worker evts pending handling on main */
+ clib_llist_index_t evts_pending_main;
- /** per-worker tx buffer free lists */
- u32 **tx_buffers;
+ /** Per-app-worker bitmap of pending notifications */
+ uword *app_wrks_pending_ntf;
- /** Per worker-thread vector of partially read events */
- session_fifo_event_t **evts_partially_read;
+ 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;
- /** per-worker active event vectors */
- session_fifo_event_t **fifo_events;
+ session_wrk_stats_t stats;
- /** vpp fifo event queue */
- unix_shared_memory_queue_t **vpp_event_queues;
+#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 void (*nat44_original_dst_lookup_fn) (
+ ip4_address_t *i2o_src, u16 i2o_src_port, ip4_address_t *i2o_dst,
+ u16 i2o_dst_port, ip_protocol_t proto, u32 *original_dst,
+ u16 *original_dst_port);
+
+typedef struct session_main_
+{
+ /** Worker contexts */
+ session_worker_t *wrk;
+
+ /** 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;
/** Per transport rx function that can either dequeue or peek */
- session_fifo_rx_fn *session_tx_fns[SESSION_N_TYPES];
+ session_fifo_rx_fn **session_tx_fns;
- u8 is_enabled;
+ /** Per session type output nodes. Could optimize to group nodes by
+ * fib but lookup would then require session type parsing in session node.
+ * Trade memory for speed, for now */
+ u32 *session_type_to_next;
+
+ /** Thread used for allocating active open connections, i.e., half-opens
+ * for transports like tcp, and sessions that will be migrated for cl
+ * transports like udp. If vpp has workers, this will be first worker. */
+ u32 transport_cl_thread;
+
+ transport_proto_t last_transport_proto_type;
- /* Convenience */
- vlib_main_t *vlib_main;
- vnet_main_t *vnet_main;
+ /** Number of workers at pool realloc barrier */
+ volatile u32 pool_realloc_at_barrier;
-#if SESSION_DBG
- /**
- * last event poll time by thread
- * Debug only. Will cause false cache-line sharing as-is
+ /** 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
*/
- f64 *last_event_poll_by_thread;
-#endif
-};
+ /** 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_wrk_mq_length;
+
+ /** Session ssvm segment configs*/
+ uword wrk_mqs_segment_size;
+
+ /** Session enable dma*/
+ u8 dma_enabled;
+
+ /** Session table size parameters */
+ u32 configured_v4_session_table_buckets;
+ u32 configured_v4_session_table_memory;
+ u32 configured_v4_halfopen_table_buckets;
+ u32 configured_v4_halfopen_table_memory;
+ u32 configured_v6_session_table_buckets;
+ u32 configured_v6_session_table_memory;
+ u32 configured_v6_halfopen_table_buckets;
+ u32 configured_v6_halfopen_table_memory;
+
+ /** Transport table (preallocation) size parameters */
+ u32 local_endpoints_table_memory;
+ u32 local_endpoints_table_buckets;
-extern session_manager_main_t session_manager_main;
+ /** Transport source port allocation range */
+ u16 port_allocator_min_src_port;
+ u16 port_allocator_max_src_port;
+
+ /** Preallocate session config parameter */
+ u32 preallocated_sessions;
+
+ u16 msg_id_base;
+
+ /** Query nat44-ed session to get original dst ip4 & dst port. */
+ nat44_original_dst_lookup_fn original_dst_lookup;
+} session_main_t;
+
+extern session_main_t session_main;
extern vlib_node_registration_t session_queue_node;
+extern vlib_node_registration_t session_input_node;
+extern vlib_node_registration_t session_queue_process_node;
+extern vlib_node_registration_t session_queue_pre_input_node;
-/*
- * 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;
+
+#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)
+{
+ clib_llist_add_tail (wrk->event_elts, evt_list, elt,
+ clib_llist_elt (wrk->event_elts, wrk->old_head));
}
-/*
- * Stream session functions
- */
+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));
+}
-stream_session_t *stream_session_lookup_listener4 (ip4_address_t * lcl,
- u16 lcl_port, u8 proto);
-stream_session_t *stream_session_lookup4 (ip4_address_t * lcl,
- ip4_address_t * rmt, u16 lcl_port,
- u16 rmt_port, u8 proto,
- u32 thread_index);
-stream_session_t *stream_session_lookup_listener6 (ip6_address_t * lcl,
- u16 lcl_port, u8 proto);
-stream_session_t *stream_session_lookup6 (ip6_address_t * lcl,
- ip6_address_t * rmt, u16 lcl_port,
- u16 rmt_port, u8, u32 thread_index);
-transport_connection_t
- * stream_session_lookup_transport4 (ip4_address_t * lcl,
- ip4_address_t * rmt, u16 lcl_port,
- u16 rmt_port, u8 proto,
- u32 thread_index);
-transport_connection_t
- * stream_session_lookup_transport6 (ip6_address_t * lcl,
- ip6_address_t * rmt, u16 lcl_port,
- u16 rmt_port, u8 proto,
- u32 thread_index);
-stream_session_t *stream_session_lookup_listener (ip46_address_t * lcl,
- u16 lcl_port, u8 proto);
-void stream_session_table_add_for_tc (transport_connection_t * tc, u64 value);
-int stream_session_table_del_for_tc (transport_connection_t * tc);
-
-always_inline stream_session_t *
-stream_session_get_tsi (u64 ti_and_si, u32 thread_index)
-{
- ASSERT ((u32) (ti_and_si >> 32) == thread_index);
- return pool_elt_at_index (session_manager_main.sessions[thread_index],
- ti_and_si & 0xFFFFFFFFULL);
-}
-
-always_inline stream_session_t *
-stream_session_get (u32 si, u32 thread_index)
-{
- return pool_elt_at_index (session_manager_main.sessions[thread_index], si);
-}
-
-always_inline stream_session_t *
-stream_session_get_if_valid (u64 si, u32 thread_index)
-{
- if (thread_index >= vec_len (session_manager_main.sessions))
+
+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_CTRL_EVT_RPC);
+ 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_cleanup (session_t *s);
+void session_program_cleanup (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 (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_main.wrk))
return 0;
- if (pool_is_free_index (session_manager_main.sessions[thread_index], si))
+ if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
return 0;
- return pool_elt_at_index (session_manager_main.sessions[thread_index], si);
+ ASSERT (session_is_valid (si, thread_index));
+ return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
}
-always_inline u64
-stream_session_handle (stream_session_t * s)
+always_inline session_t *
+session_get_from_handle (session_handle_t handle)
{
- return ((u64) s->thread_index << 32) | (u64) s->session_index;
+ 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);
}
-always_inline u32
-stream_session_index_from_handle (u64 handle)
+always_inline session_t *
+session_get_from_handle_if_valid (session_handle_t handle)
{
- return handle & 0xFFFFFFFF;
+ u32 session_index, thread_index;
+ session_parse_handle (handle, &session_index, &thread_index);
+ return session_get_if_valid (session_index, thread_index);
}
-always_inline u32
-stream_session_thread_from_handle (u64 handle)
+u64 session_segment_handle (session_t * s);
+
+/**
+ * Get session from handle and avoid pool validation if no same thread
+ *
+ * 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_worker_t *wrk = &session_main.wrk[thread_index];
+
+ if (thread_index == vlib_get_thread_index ())
+ {
+ return pool_elt_at_index (wrk->sessions,
+ session_index_from_handle (handle));
+ }
+ else
+ {
+ /* 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)
{
- return handle >> 32;
+ 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_enqueue_notify_cl (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_enqueue_dgram_connection_cl (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 void
-stream_session_parse_handle (u64 handle, u32 * index, u32 * thread_index)
+session_set_state (session_t *s, session_state_t session_state)
{
- *index = stream_session_index_from_handle (handle);
- *thread_index = stream_session_thread_from_handle (handle);
+ s->session_state = session_state;
+ SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
}
-always_inline stream_session_t *
-stream_session_get_from_handle (u64 handle)
+always_inline u32
+transport_max_rx_enqueue (transport_connection_t * tc)
{
- session_manager_main_t *smm = &session_manager_main;
- return pool_elt_at_index (smm->sessions[stream_session_thread_from_handle
- (handle)],
- stream_session_index_from_handle (handle));
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_max_enqueue_prod (s->rx_fifo);
}
-always_inline stream_session_t *
-stream_session_listener_get (u8 sst, u64 si)
+always_inline u32
+transport_max_tx_dequeue (transport_connection_t * tc)
{
- return pool_elt_at_index (session_manager_main.listen_sessions[sst], si);
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_max_dequeue_cons (s->tx_fifo);
}
always_inline u32
-stream_session_get_index (stream_session_t * s)
+transport_max_rx_dequeue (transport_connection_t * tc)
{
- if (s->session_state == SESSION_STATE_LISTENING)
- return s - session_manager_main.listen_sessions[s->session_type];
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_max_dequeue (s->rx_fifo);
+}
- return s - session_manager_main.sessions[s->thread_index];
+always_inline u32
+transport_rx_fifo_size (transport_connection_t * tc)
+{
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_size (s->rx_fifo);
}
always_inline u32
-stream_session_max_rx_enqueue (transport_connection_t * tc)
+transport_tx_fifo_size (transport_connection_t * tc)
+{
+ 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 = stream_session_get (tc->s_index, tc->thread_index);
- return svm_fifo_max_enqueue (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 u32
-stream_session_fifo_size (transport_connection_t * tc)
-{
- stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
- return s->server_rx_fifo->nitems;
-}
-
-int
-stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b,
- u32 offset, u8 queue_event, u8 is_in_order);
-u32
-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);
-
-void stream_session_connect_notify (transport_connection_t * tc, u8 sst,
- u8 is_fail);
-void stream_session_init_fifos_pointers (transport_connection_t * tc,
- u32 rx_pointer, u32 tx_pointer);
-
-void stream_session_accept_notify (transport_connection_t * tc);
-void stream_session_disconnect_notify (transport_connection_t * tc);
-void stream_session_delete_notify (transport_connection_t * tc);
-void stream_session_reset_notify (transport_connection_t * tc);
-int
-stream_session_accept (transport_connection_t * tc, u32 listener_index,
- u8 sst, u8 notify);
-int
-stream_session_open (u32 app_index, session_type_t st,
- transport_endpoint_t * tep,
- transport_connection_t ** tc);
-int stream_session_listen (stream_session_t * s, transport_endpoint_t * tep);
-int stream_session_stop_listen (stream_session_t * s);
-void stream_session_disconnect (stream_session_t * s);
-void stream_session_cleanup (stream_session_t * s);
-void session_send_session_evt_to_thread (u64 session_handle,
- fifo_event_type_t evt_type,
- u32 thread_index);
-u8 *format_stream_session (u8 * s, va_list * args);
-int
-send_session_connected_callback (u32 app_index, u32 api_context,
- stream_session_t * s, u8 is_fail);
-
-
-void session_register_transport (u8 type, const transport_proto_vft_t * vft);
-transport_proto_vft_t *session_get_transport_vft (u8 type);
+transport_tx_fifo_has_dgram (transport_connection_t *tc)
+{
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ u32 max_deq = svm_fifo_max_dequeue_cons (s->tx_fifo);
+ session_dgram_pre_hdr_t phdr;
-clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
+ if (max_deq <= sizeof (session_dgram_hdr_t))
+ return 0;
+ svm_fifo_peek (s->tx_fifo, 0, sizeof (phdr), (u8 *) &phdr);
+ return max_deq >= phdr.data_length + sizeof (session_dgram_hdr_t);
+}
-always_inline unix_shared_memory_queue_t *
-session_manager_get_vpp_event_queue (u32 thread_index)
+always_inline void
+transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
{
- return session_manager_main.vpp_event_queues[thread_index];
+ 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);
}
-int session_manager_flush_enqueue_events (u32 thread_index);
+always_inline clib_time_type_t
+transport_time_now (u32 thread_index)
+{
+ return session_main.wrk[thread_index].last_vlib_time;
+}
-always_inline u64
-listen_session_get_handle (stream_session_t * s)
+always_inline clib_us_time_t
+transport_us_time_now (u32 thread_index)
{
- ASSERT (s->session_state == SESSION_STATE_LISTENING);
- return ((u64) s->session_type << 32) | s->session_index;
+ return session_main.wrk[thread_index].last_vlib_us_time;
}
-always_inline stream_session_t *
-listen_session_get_from_handle (u64 handle)
+always_inline clib_time_type_t
+transport_seconds_per_loop (u32 thread_index)
{
- session_manager_main_t *smm = &session_manager_main;
- stream_session_t *s;
- u32 type, index;
- type = handle >> 32;
- index = handle & 0xFFFFFFFF;
+ return session_main.wrk[thread_index].vm->seconds_per_loop;
+}
- if (pool_is_free_index (smm->listen_sessions[type], index))
- return 0;
+always_inline void
+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, SESSION_IO_EVT_TX);
+}
- s = pool_elt_at_index (smm->listen_sessions[type], index);
- ASSERT (s->session_state == SESSION_STATE_LISTENING);
- return s;
+always_inline u32
+transport_cl_thread (void)
+{
+ return session_main.transport_cl_thread;
+}
+
+always_inline u32
+session_vlib_thread_is_cl_thread (void)
+{
+ return (vlib_get_thread_index () == transport_cl_thread () ||
+ vlib_thread_is_main_w_barrier ());
+}
+
+/*
+ * Listen sessions
+ */
+
+always_inline u64
+listen_session_get_handle (session_t * s)
+{
+ ASSERT (s->session_state == SESSION_STATE_LISTENING ||
+ session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
+ return session_handle (s);
}
-always_inline stream_session_t *
-listen_session_new (session_type_t type)
+always_inline session_t *
+listen_session_get_from_handle (session_handle_t handle)
{
- stream_session_t *s;
- pool_get_aligned (session_manager_main.listen_sessions[type], s,
- CLIB_CACHE_LINE_BYTES);
- memset (s, 0, sizeof (*s));
+ return session_get_from_handle (handle);
+}
+always_inline void
+listen_session_parse_handle (session_handle_t handle, u32 * index,
+ u32 * thread_index)
+{
+ session_parse_handle (handle, index, thread_index);
+}
+
+always_inline session_t *
+listen_session_alloc (u8 thread_index, session_type_t type)
+{
+ session_t *s;
+ s = session_alloc (thread_index);
s->session_type = type;
s->session_state = SESSION_STATE_LISTENING;
- s->session_index = s - session_manager_main.listen_sessions[type];
+ return s;
+}
+
+always_inline session_t *
+listen_session_get (u32 ls_index)
+{
+ return session_get (ls_index, 0);
+}
+always_inline void
+listen_session_free (session_t * s)
+{
+ ASSERT (!s->rx_fifo);
+ session_free (s);
+}
+
+always_inline session_t *
+ho_session_alloc (void)
+{
+ session_t *s;
+ ASSERT (session_vlib_thread_is_cl_thread ());
+ s = session_alloc (transport_cl_thread ());
+ s->session_state = SESSION_STATE_CONNECTING;
+ s->flags |= SESSION_F_HALF_OPEN;
return s;
}
-always_inline stream_session_t *
-listen_session_get (session_type_t type, u32 index)
+always_inline session_t *
+ho_session_get (u32 ho_index)
{
- return pool_elt_at_index (session_manager_main.listen_sessions[type],
- index);
+ return session_get (ho_index, transport_cl_thread ());
}
always_inline void
-listen_session_del (stream_session_t * s)
+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 vec_elt_at_index (session_main.wrk, thread_index);
+}
+
+static inline session_worker_t *
+session_main_get_worker_if_valid (u32 thread_index)
{
- pool_put (session_manager_main.listen_sessions[s->session_type], s);
+ if (thread_index > vec_len (session_main.wrk))
+ return 0;
+ return session_main_get_worker (thread_index);
+}
+
+always_inline svm_msg_q_t *
+session_main_get_vpp_event_queue (u32 thread_index)
+{
+ return session_main_get_worker (thread_index)->vpp_event_queue;
}
always_inline u8
-session_manager_is_enabled ()
+session_main_is_enabled ()
+{
+ return session_main.is_enabled == 1;
+}
+
+always_inline void
+session_worker_stat_error_inc (session_worker_t *wrk, int error, int value)
+{
+ if ((-(error) >= 0 && -(error) < SESSION_N_ERRORS))
+ wrk->stats.errors[-error] += value;
+ else
+ SESSION_DBG ("unknown session counter");
+}
+
+always_inline void
+session_stat_error_inc (int error, int value)
+{
+ session_worker_t *wrk;
+ wrk = session_main_get_worker (vlib_get_thread_index ());
+ session_worker_stat_error_inc (wrk, error, value);
+}
+
+#define session_cli_return_if_not_enabled() \
+do { \
+ if (!session_main.is_enabled) \
+ return clib_error_return (0, "session layer is not enabled"); \
+} while (0)
+
+void session_main_flush_enqueue_events (transport_proto_t transport_proto,
+ u32 thread_index);
+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 *);
+void session_wrk_program_app_wrk_evts (session_worker_t *wrk,
+ u32 app_wrk_index);
+
+session_t *session_alloc_for_connection (transport_connection_t * tc);
+session_t *session_alloc_for_half_open (transport_connection_t *tc);
+void session_get_original_dst (transport_endpoint_t *i2o_src,
+ transport_endpoint_t *i2o_dst,
+ transport_proto_t transport_proto,
+ u32 *original_dst, u16 *original_dst_port);
+
+typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
+
+typedef struct
{
- return session_manager_main.is_enabled == 1;
+ 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, 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__ */
/*
Code Review / vpp.git / blobdiff