diff options
author | Sachin Saxena <sachin.saxena@freescale.com> | 2018-02-28 20:28:52 +0530 |
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committer | Sachin Saxena <sachin.saxena@nxp.com> | 2018-02-28 20:34:56 +0530 |
commit | 0689fce93ba269c48f83a2f70f971b3976d04c90 (patch) | |
tree | 4cc2908df3598507cc1828ac19d8c43b22450ffa /src/vnet/session/session.h | |
parent | 746b57564deede624261ab8a96c94f562f24d22c (diff) | |
parent | d594711a5d79859a7d0bde83a516f7ab52051d9b (diff) |
Merge branch 'stable/1710' of https://gerrit.fd.io/r/vpp into 17101710
Diffstat (limited to 'src/vnet/session/session.h')
-rw-r--r-- | src/vnet/session/session.h | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h new file mode 100644 index 00000000..83addec2 --- /dev/null +++ b/src/vnet/session/session.h @@ -0,0 +1,436 @@ +/* + * Copyright (c) 2017 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: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef __included_session_h__ +#define __included_session_h__ + +#include <vnet/session/stream_session.h> +#include <vnet/session/session_lookup.h> +#include <vnet/session/transport_interface.h> +#include <vlibmemory/unix_shared_memory_queue.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; + +static inline const char * +fifo_event_type_str (fifo_event_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_TIMEOUT: + return "FIFO_EVENT_TIMEOUT"; + 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"; + } +} + +#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; + +typedef struct +{ + void *fp; + void *arg; +} rpc_args_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* */ + +/* Forward definition */ +typedef struct _session_manager_main session_manager_main_t; + +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); + +extern session_fifo_rx_fn session_tx_fifo_peek_and_snd; +extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd; + +u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_fifo_event_t * e); + +struct _session_manager_main +{ + /** Per worker thread session pools */ + stream_session_t **sessions; + + /** Pool of listen sessions. Same type as stream sessions to ease lookups */ + stream_session_t *listen_sessions[SESSION_N_TYPES]; + + /** Sparse vector to map dst port to stream server */ + u16 *stream_server_by_dst_port[SESSION_N_TYPES]; + + /** per-worker enqueue epoch counters */ + u8 *current_enqueue_epoch; + + /** Per-worker thread vector of sessions to enqueue */ + u32 **session_indices_to_enqueue_by_thread; + + /** per-worker tx buffer free lists */ + u32 **tx_buffers; + + /** Per worker-thread vector of partially read events */ + session_fifo_event_t **free_event_vector; + + /** per-worker active event vectors */ + session_fifo_event_t **pending_event_vector; + + /** vpp fifo event queue */ + unix_shared_memory_queue_t **vpp_event_queues; + + /** vpp fifo event queue configured length */ + u32 configured_event_queue_length; + + /** 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; + + /** 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 manager is enabled */ + u8 is_enabled; + + /** Preallocate session config parameter */ + u32 preallocated_sessions; + +#if SESSION_DBG + /** + * last event poll time by thread + * Debug only. Will cause false cache-line sharing as-is + */ + f64 *last_event_poll_by_thread; +#endif + +}; + +extern session_manager_main_t session_manager_main; +extern vlib_node_registration_t session_queue_node; + +/* + * Session manager function + */ +always_inline session_manager_main_t * +vnet_get_session_manager_main () +{ + return &session_manager_main; +} + +always_inline u8 +stream_session_is_valid (u32 si, u8 thread_index) +{ + stream_session_t *s; + s = pool_elt_at_index (session_manager_main.sessions[thread_index], 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; +} + +always_inline stream_session_t * +stream_session_get (u32 si, u32 thread_index) +{ + ASSERT (stream_session_is_valid (si, 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)) + return 0; + + if (pool_is_free_index (session_manager_main.sessions[thread_index], si)) + return 0; + + ASSERT (stream_session_is_valid (si, thread_index)); + return pool_elt_at_index (session_manager_main.sessions[thread_index], si); +} + +always_inline u64 +stream_session_handle (stream_session_t * s) +{ + return ((u64) s->thread_index << 32) | (u64) s->session_index; +} + +always_inline u32 +stream_session_index_from_handle (u64 handle) +{ + return handle & 0xFFFFFFFF; +} + +always_inline u32 +stream_session_thread_from_handle (u64 handle) +{ + return handle >> 32; +} + +always_inline void +stream_session_parse_handle (u64 handle, u32 * index, u32 * thread_index) +{ + *index = stream_session_index_from_handle (handle); + *thread_index = stream_session_thread_from_handle (handle); +} + +always_inline stream_session_t * +stream_session_get_from_handle (u64 handle) +{ + 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)); +} + +always_inline stream_session_t * +stream_session_listener_get (u8 sst, u64 si) +{ + return pool_elt_at_index (session_manager_main.listen_sessions[sst], si); +} + +always_inline u32 +stream_session_get_index (stream_session_t * s) +{ + if (s->session_state == SESSION_STATE_LISTENING) + return s - session_manager_main.listen_sessions[s->session_type]; + + return s - session_manager_main.sessions[s->thread_index]; +} + +always_inline u32 +stream_session_max_rx_enqueue (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); +} + +always_inline u32 +stream_session_rx_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; +} + +u32 stream_session_tx_fifo_max_dequeue (transport_connection_t * tc); + +int +stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b, + u32 offset, u8 queue_event, u8 is_in_order); +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 stream_session_connect_notify (transport_connection_t * tc, 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); +uword unformat_stream_session (unformat_input_t * input, va_list * args); +uword unformat_transport_connection (unformat_input_t * input, + va_list * args); + +int +send_session_connected_callback (u32 app_index, u32 api_context, + stream_session_t * s, u8 is_fail); + + +clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en); + +always_inline unix_shared_memory_queue_t * +session_manager_get_vpp_event_queue (u32 thread_index) +{ + return session_manager_main.vpp_event_queues[thread_index]; +} + +int session_manager_flush_enqueue_events (u32 thread_index); + +always_inline u64 +listen_session_get_handle (stream_session_t * s) +{ + ASSERT (s->session_state == SESSION_STATE_LISTENING); + return ((u64) s->session_type << 32) | s->session_index; +} + +always_inline stream_session_t * +listen_session_get_from_handle (u64 handle) +{ + session_manager_main_t *smm = &session_manager_main; + stream_session_t *s; + u32 type, index; + type = handle >> 32; + index = handle & 0xFFFFFFFF; + + if (pool_is_free_index (smm->listen_sessions[type], index)) + return 0; + + s = pool_elt_at_index (smm->listen_sessions[type], index); + ASSERT (s->session_state == SESSION_STATE_LISTENING); + return s; +} + +always_inline stream_session_t * +listen_session_new (session_type_t type) +{ + stream_session_t *s; + pool_get_aligned (session_manager_main.listen_sessions[type], s, + CLIB_CACHE_LINE_BYTES); + memset (s, 0, sizeof (*s)); + + s->session_type = type; + s->session_state = SESSION_STATE_LISTENING; + s->session_index = s - session_manager_main.listen_sessions[type]; + + return s; +} + +always_inline stream_session_t * +listen_session_get (session_type_t type, u32 index) +{ + return pool_elt_at_index (session_manager_main.listen_sessions[type], + index); +} + +always_inline void +listen_session_del (stream_session_t * s) +{ + pool_put (session_manager_main.listen_sessions[s->session_type], s); +} + +always_inline stream_session_t * +session_manager_get_listener (u8 type, u32 index) +{ + return pool_elt_at_index (session_manager_main.listen_sessions[type], + index); +} + +always_inline void +session_manager_set_transport_rx_fn (u8 type, u8 is_peek) +{ + /* If an offset function is provided, then peek instead of dequeue */ + session_manager_main.session_tx_fns[type] = (is_peek) ? + session_tx_fifo_peek_and_snd : session_tx_fifo_dequeue_and_snd; +} + +session_type_t +session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4); + +always_inline u8 +session_manager_is_enabled () +{ + return session_manager_main.is_enabled == 1; +} + +#endif /* __included_session_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |