/*
- * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Copyright (c) 2016-2019 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:
#define TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ /**< 24 days */
#define TCP_FIB_RECHECK_PERIOD 1 * THZ /**< Recheck every 1s */
#define TCP_MAX_OPTION_SPACE 40
+#define TCP_CC_DATA_SZ 24
#define TCP_DUPACK_THRESHOLD 3
-#define TCP_MAX_RX_FIFO_SIZE 4 << 20
+#define TCP_MAX_RX_FIFO_SIZE 32 << 20
#define TCP_MIN_RX_FIFO_SIZE 4 << 10
#define TCP_IW_N_SEGMENTS 10
#define TCP_ALWAYS_ACK 1 /**< On/off delayed acks */
_(KEEP, "KEEP") \
_(WAITCLOSE, "WAIT CLOSE") \
_(RETRANSMIT_SYN, "RETRANSMIT SYN") \
- _(ESTABLISH, "ESTABLISH")
+ _(ESTABLISH, "ESTABLISH") \
+ _(ESTABLISH_AO, "ESTABLISH_AO") \
typedef enum _tcp_timers
{
#define TCP_ESTABLISH_TIME 750 /* 75s */
#define TCP_SYN_RCVD_TIME 600 /* 60s */
#define TCP_2MSL_TIME 300 /* 30s */
-#define TCP_CLOSEWAIT_TIME 20 /* 0.1s */
-#define TCP_CLEANUP_TIME 5 /* 0.5s Time to wait before cleanup */
+#define TCP_CLOSEWAIT_TIME 20 /* 2s */
+#define TCP_TIMEWAIT_TIME 100 /* 10s */
+#define TCP_FINWAIT1_TIME 600 /* 60s */
+#define TCP_CLEANUP_TIME 1 /* 0.1s */
#define TCP_TIMER_PERSIST_MIN 2 /* 0.2s */
#define TCP_RTO_MAX 60 * THZ /* Min max RTO (60s) as per RFC6298 */
#define TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */
#define TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */
#define TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */
+#define TCP_RTO_BOFF_MAX 8 /* Max number of retries before reset */
/** TCP connection flags */
#define foreach_tcp_connection_flag \
_(SNDACK, "Send ACK") \
_(FINSNT, "FIN sent") \
- _(SENT_RCV_WND0, "Sent 0 receive window") \
- _(RECOVERY, "Recovery on") \
- _(FAST_RECOVERY, "Fast Recovery on") \
- _(FR_1_SMSS, "Sent 1 SMSS") \
+ _(RECOVERY, "Recovery") \
+ _(FAST_RECOVERY, "Fast Recovery") \
+ _(DCNT_PENDING, "Disconnect pending") \
_(HALF_OPEN_DONE, "Half-open completed") \
- _(FINPNDG, "FIN pending")
+ _(FINPNDG, "FIN pending") \
+ _(FRXT_PENDING, "Fast-retransmit pending") \
+ _(FRXT_FIRST, "Fast-retransmit first again") \
+ _(DEQ_PENDING, "Pending dequeue acked") \
+ _(PSH_PENDING, "PSH pending") \
+ _(FINRCVD, "FIN received") \
+ _(RATE_SAMPLE, "Conn does rate sampling") \
+ _(TRACK_BURST, "Track burst") \
+ _(ZERO_RWND_SENT, "Zero RWND sent") \
typedef enum _tcp_connection_flag_bits
{
TCP_CONN_N_FLAGS
} tcp_connection_flags_e;
-/** TCP buffer flags */
-#define foreach_tcp_buf_flag \
- _ (ACK) /**< Sending ACK. */ \
- _ (DUPACK) /**< Sending DUPACK. */ \
-
-enum
-{
-#define _(f) TCP_BUF_BIT_##f,
- foreach_tcp_buf_flag
-#undef _
- TCP_N_BUF_BITS,
-};
-
-enum
-{
-#define _(f) TCP_BUF_FLAG_##f = 1 << TCP_BUF_BIT_##f,
- foreach_tcp_buf_flag
-#undef _
-};
-
#define TCP_SCOREBOARD_TRACE (0)
-#define TCP_MAX_SACK_BLOCKS 15 /**< Max number of SACK blocks stored */
+#define TCP_MAX_SACK_BLOCKS 256 /**< Max number of SACK blocks stored */
#define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)
typedef struct _scoreboard_trace_elt
u32 tail; /**< Index of last entry */
u32 sacked_bytes; /**< Number of bytes sacked in sb */
u32 last_sacked_bytes; /**< Number of bytes last sacked */
- u32 last_bytes_delivered; /**< Number of sack bytes delivered */
+ u32 last_bytes_delivered; /**< Sack bytes delivered to app */
u32 snd_una_adv; /**< Bytes to add to snd_una */
u32 high_sacked; /**< Highest byte sacked (fack) */
u32 high_rxt; /**< Highest retransmitted sequence */
#define tcp_scoreboard_trace_add(_tc, _ack)
#endif
+sack_scoreboard_hole_t *scoreboard_next_rxt_hole (sack_scoreboard_t * sb,
+ sack_scoreboard_hole_t *
+ start, u8 have_sent_1_smss,
+ u8 * can_rescue,
+ u8 * snd_limited);
+sack_scoreboard_hole_t *scoreboard_get_hole (sack_scoreboard_t * sb,
+ u32 index);
+
+sack_scoreboard_hole_t *scoreboard_next_hole (sack_scoreboard_t * sb,
+ sack_scoreboard_hole_t * hole);
+sack_scoreboard_hole_t *scoreboard_prev_hole (sack_scoreboard_t * sb,
+ sack_scoreboard_hole_t * hole);
+sack_scoreboard_hole_t *scoreboard_first_hole (sack_scoreboard_t * sb);
+sack_scoreboard_hole_t *scoreboard_last_hole (sack_scoreboard_t * sb);
+void scoreboard_clear (sack_scoreboard_t * sb);
+void scoreboard_init (sack_scoreboard_t * sb);
+u8 *format_tcp_scoreboard (u8 * s, va_list * args);
+
+#define TCP_BTS_INVALID_INDEX ((u32)~0)
+
+typedef enum tcp_bts_flags_
+{
+ TCP_BTS_IS_RXT = 1,
+ TCP_BTS_IS_APP_LIMITED = 1 << 1,
+} __clib_packed tcp_bts_flags_t;
+
+typedef struct tcp_bt_sample_
+{
+ u32 next; /**< Next sample index in list */
+ u32 prev; /**< Previous sample index in list */
+ u32 min_seq; /**< Min seq number in sample */
+ u32 max_seq; /**< Max seq number. Set for rxt samples */
+ u64 delivered; /**< Total delivered when sample taken */
+ f64 delivered_time; /**< Delivered time when sample taken */
+ u64 tx_rate; /**< Tx pacing rate */
+ tcp_bts_flags_t flags; /**< Sample flag */
+} tcp_bt_sample_t;
+
+typedef struct tcp_rate_sample_
+{
+ u64 sample_delivered; /**< Delivered of sample used for rate */
+ u32 delivered; /**< Bytes delivered in ack time */
+ f64 ack_time; /**< Time to ack the bytes delivered */
+ u64 tx_rate; /**< Tx pacing rate */
+ tcp_bts_flags_t flags; /**< Rate sample flags from bt sample */
+} tcp_rate_sample_t;
+
+typedef struct tcp_byte_tracker_
+{
+ tcp_bt_sample_t *samples; /**< Pool of samples */
+ rb_tree_t sample_lookup; /**< Rbtree for sample lookup by min_seq */
+ u32 head; /**< Head of samples linked list */
+ u32 tail; /**< Tail of samples linked list */
+ u32 last_ooo; /**< Cached last ooo sample */
+} tcp_byte_tracker_t;
+
typedef enum _tcp_cc_algorithm_type
{
TCP_CC_NEWRENO,
+ TCP_CC_CUBIC,
+ TCP_CC_LAST = TCP_CC_CUBIC
} tcp_cc_algorithm_type_e;
typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t;
TCP_CC_PARTIALACK
} tcp_cc_ack_t;
+typedef enum tcp_cc_event_
+{
+ TCP_CC_EVT_START_TX,
+} tcp_cc_event_t;
+
typedef struct _tcp_connection
{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
transport_connection_t connection; /**< Common transport data. First! */
u8 state; /**< TCP state as per tcp_state_t */
u32 irs; /**< initial remote sequence */
/* Options */
- tcp_options_t rcv_opts; /**< Rx options for connection */
- tcp_options_t snd_opts; /**< Tx options for connection */
u8 snd_opts_len; /**< Tx options len */
- u8 rcv_wscale; /**< Window scale to advertise to peer */
- u8 snd_wscale; /**< Window scale to use when sending */
- u32 tsval_recent; /**< Last timestamp received */
- u32 tsval_recent_age; /**< When last updated tstamp_recent*/
+ u8 rcv_wscale; /**< Window scale to advertise to peer */
+ u8 snd_wscale; /**< Window scale to use when sending */
+ u32 tsval_recent; /**< Last timestamp received */
+ u32 tsval_recent_age; /**< When last updated tstamp_recent*/
+ tcp_options_t snd_opts; /**< Tx options for connection */
+ tcp_options_t rcv_opts; /**< Rx options for connection */
sack_block_t *snd_sacks; /**< Vector of SACKs to send. XXX Fixed size? */
+ u8 snd_sack_pos; /**< Position in vec of first block to send */
+ sack_block_t *snd_sacks_fl; /**< Vector for building new list */
sack_scoreboard_t sack_sb; /**< SACK "scoreboard" that tracks holes */
u16 rcv_dupacks; /**< Number of DUPACKs received */
- u8 snt_dupacks; /**< Number of DUPACKs sent in a burst */
+ u8 pending_dupacks; /**< Number of DUPACKs to be sent */
/* Congestion control */
u32 cwnd; /**< Congestion window */
+ u32 cwnd_acc_bytes; /**< Bytes accumulated for cwnd increment */
u32 ssthresh; /**< Slow-start threshold */
u32 prev_ssthresh; /**< ssthresh before congestion */
u32 prev_cwnd; /**< ssthresh before congestion */
u32 bytes_acked; /**< Bytes acknowledged by current segment */
+ u32 burst_acked; /**< Bytes acknowledged in current burst */
u32 snd_rxt_bytes; /**< Retransmitted bytes */
u32 snd_rxt_ts; /**< Timestamp when first packet is retransmitted */
u32 tsecr_last_ack; /**< Timestamp echoed to us in last healthy ACK */
u32 snd_congestion; /**< snd_una_max when congestion is detected */
+ u32 tx_fifo_size; /**< Tx fifo size. Used to constrain cwnd */
tcp_cc_algorithm_t *cc_algo; /**< Congestion control algorithm */
+ u8 cc_data[TCP_CC_DATA_SZ]; /**< Congestion control algo private data */
/* RTT and RTO */
u32 rto; /**< Retransmission timeout */
u32 rto_boff; /**< Index for RTO backoff */
u32 srtt; /**< Smoothed RTT */
u32 rttvar; /**< Smoothed mean RTT difference. Approximates variance */
- u32 rtt_ts; /**< Timestamp for tracked ACK */
u32 rtt_seq; /**< Sequence number for tracked ACK */
+ f64 rtt_ts; /**< Timestamp for tracked ACK */
+ f64 mrtt_us; /**< High precision mrtt from tracked acks */
- u16 mss; /**< Our max seg size that includes options */
+ u32 psh_seq; /**< Add psh header for seg that includes this */
+ u32 next_node_index; /**< Can be used to control next node in output */
+ u32 next_node_opaque; /**< Opaque to pass to next node */
u32 limited_transmit; /**< snd_nxt when limited transmit starts */
+ u32 sw_if_index; /**< Interface for the connection */
+
+ /* Delivery rate estimation */
+ u64 delivered; /**< Total bytes delivered to peer */
+ u64 app_limited; /**< Delivered when app-limited detected */
+ f64 delivered_time; /**< Time last bytes were acked */
+ tcp_byte_tracker_t *bt; /**< Tx byte tracker */
+
u32 last_fib_check; /**< Last time we checked fib route for peer */
+ u16 mss; /**< Our max seg size that includes options */
+ u32 timestamp_delta;
} tcp_connection_t;
+/* *INDENT-OFF* */
struct _tcp_cc_algorithm
{
- void (*rcv_ack) (tcp_connection_t * tc);
- void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack);
+ const char *name;
+ uword (*unformat_cfg) (unformat_input_t * input);
+ void (*init) (tcp_connection_t * tc);
+ void (*cleanup) (tcp_connection_t * tc);
+ void (*rcv_ack) (tcp_connection_t * tc, tcp_rate_sample_t *rs);
+ void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack,
+ tcp_rate_sample_t *rs);
void (*congestion) (tcp_connection_t * tc);
+ void (*loss) (tcp_connection_t * tc);
void (*recovered) (tcp_connection_t * tc);
- void (*init) (tcp_connection_t * tc);
+ void (*undo_recovery) (tcp_connection_t * tc);
+ void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt);
};
+/* *INDENT-ON* */
#define tcp_fastrecovery_on(tc) (tc)->flags |= TCP_CONN_FAST_RECOVERY
#define tcp_fastrecovery_off(tc) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY
#define tcp_in_fastrecovery(tc) ((tc)->flags & TCP_CONN_FAST_RECOVERY)
#define tcp_in_recovery(tc) ((tc)->flags & (TCP_CONN_RECOVERY))
#define tcp_in_slowstart(tc) (tc->cwnd < tc->ssthresh)
-#define tcp_fastrecovery_sent_1_smss(tc) ((tc)->flags & TCP_CONN_FR_1_SMSS)
-#define tcp_fastrecovery_1_smss_on(tc) ((tc)->flags |= TCP_CONN_FR_1_SMSS)
-#define tcp_fastrecovery_1_smss_off(tc) ((tc)->flags &= ~TCP_CONN_FR_1_SMSS)
+#define tcp_disconnect_pending(tc) ((tc)->flags & TCP_CONN_DCNT_PENDING)
+#define tcp_disconnect_pending_on(tc) ((tc)->flags |= TCP_CONN_DCNT_PENDING)
+#define tcp_disconnect_pending_off(tc) ((tc)->flags &= ~TCP_CONN_DCNT_PENDING)
+#define tcp_fastrecovery_first(tc) ((tc)->flags & TCP_CONN_FRXT_FIRST)
+#define tcp_fastrecovery_first_on(tc) ((tc)->flags |= TCP_CONN_FRXT_FIRST)
+#define tcp_fastrecovery_first_off(tc) ((tc)->flags &= ~TCP_CONN_FRXT_FIRST)
#define tcp_in_cong_recovery(tc) ((tc)->flags & \
(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY))
tcp_cong_recovery_off (tcp_connection_t * tc)
{
tc->flags &= ~(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY);
- tcp_fastrecovery_1_smss_off (tc);
+ tcp_fastrecovery_first_off (tc);
}
-typedef enum
-{
- TCP_IP4,
- TCP_IP6,
- TCP_N_AF,
-} tcp_af_t;
+#define tcp_zero_rwnd_sent(tc) (tc)->flags &= TCP_CONN_ZERO_RWND_SENT
+#define tcp_zero_rwnd_sent_on(tc) (tc)->flags |= TCP_CONN_ZERO_RWND_SENT
+#define tcp_zero_rwnd_sent_off(tc) (tc)->flags &= ~TCP_CONN_ZERO_RWND_SENT
typedef enum _tcp_error
{
u8 next, error;
} tcp_lookup_dispatch_t;
+typedef struct tcp_worker_ctx_
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+ /** worker time */
+ u32 time_now;
+
+ /** worker timer wheel */
+ tw_timer_wheel_16t_2w_512sl_t timer_wheel;
+
+ /** tx buffer free list */
+ u32 *tx_buffers;
+
+ /** tx frames for tcp 4/6 output nodes */
+ vlib_frame_t *tx_frames[2];
+
+ /** tx frames for ip 4/6 lookup nodes */
+ vlib_frame_t *ip_lookup_tx_frames[2];
+
+ /** vector of connections needing fast rxt */
+ u32 *pending_fast_rxt;
+
+ /** vector of connections now doing fast rxt */
+ u32 *ongoing_fast_rxt;
+
+ /** vector of connections that will do fast rxt */
+ u32 *postponed_fast_rxt;
+
+ /** vector of pending ack dequeues */
+ u32 *pending_deq_acked;
+
+ /** vector of pending acks */
+ u32 *pending_acks;
+
+ /** vector of pending disconnect notifications */
+ u32 *pending_disconnects;
+
+ /** convenience pointer to this thread's vlib main */
+ vlib_main_t *vm;
+
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
+
+ /** cached 'on the wire' options for bursts */
+ u8 cached_opts[40];
+
+} tcp_worker_ctx_t;
+
+typedef struct tcp_iss_seed_
+{
+ u64 first;
+ u64 second;
+} tcp_iss_seed_t;
+
typedef struct _tcp_main
{
/* Per-worker thread tcp connection pools */
u8 log2_tstamp_clocks_per_tick;
f64 tstamp_ticks_per_clock;
- u32 *time_now;
- /** per-worker tx buffer free lists */
- u32 **tx_buffers;
- /** per-worker tx frames to 4/6 output nodes */
- vlib_frame_t **tx_frames[2];
-
- /* Per worker-thread timer wheel for connections timers */
- tw_timer_wheel_16t_2w_512sl_t *timer_wheels;
+ /** per-worker context */
+ tcp_worker_ctx_t *wrk_ctx;
/* Pool of half-open connections on which we've sent a SYN */
tcp_connection_t *half_open_connections;
clib_spinlock_t half_open_lock;
- /* Pool of local TCP endpoints */
- transport_endpoint_t *local_endpoints;
+ /** vlib buffer size */
+ u32 bytes_per_buffer;
- /* Local endpoints lookup table */
- transport_endpoint_table_t local_endpoints_table;
- clib_spinlock_t local_endpoints_lock;
+ /* Seed used to generate random iss */
+ tcp_iss_seed_t iss_seed;
/* Congestion control algorithms registered */
tcp_cc_algorithm_t *cc_algos;
+ /** Hash table of cc algorithms by name */
+ uword *cc_algo_by_name;
+
+ /** Last cc algo registered */
+ tcp_cc_algorithm_type_e cc_last_type;
+
+ /*
+ * Configuration
+ */
+
/* Flag that indicates if stack is on or off */
u8 is_enabled;
+ /** Max rx fifo size for a session. It is used in to compute the
+ * rfc 7323 window scaling factor */
+ u32 max_rx_fifo;
+
+ /** Default MTU to be used when establishing connections */
+ u16 default_mtu;
+
+ /** Initial CWND multiplier, which multiplies MSS to determine initial CWND.
+ * Set 0 to determine the initial CWND by another way */
+ u16 initial_cwnd_multiplier;
+
/** Number of preallocated connections */
u32 preallocated_connections;
u32 preallocated_half_open_connections;
- /** Transport table (preallocation) size parameters */
- u32 local_endpoints_table_memory;
- u32 local_endpoints_table_buckets;
-
/** Vectors of src addresses. Optional unless one needs > 63K active-opens */
ip4_address_t *ip4_src_addresses;
u32 last_v4_address_rotor;
u32 last_v6_address_rotor;
ip6_address_t *ip6_src_addresses;
- /** Port allocator random number generator seed */
- u32 port_allocator_seed;
+ /** Enable tx pacing for new connections */
+ u8 tx_pacing;
- /** vlib buffer size */
- u32 bytes_per_buffer;
+ u8 punt_unknown4;
+ u8 punt_unknown6;
+
+ /** fault-injection */
+ f64 buffer_fail_fraction;
+
+ /** Default congestion control algorithm type */
+ tcp_cc_algorithm_type_e cc_algo;
} tcp_main_t;
extern tcp_main_t tcp_main;
extern vlib_node_registration_t tcp6_input_node;
extern vlib_node_registration_t tcp4_output_node;
extern vlib_node_registration_t tcp6_output_node;
+extern vlib_node_registration_t tcp4_established_node;
+extern vlib_node_registration_t tcp6_established_node;
+extern vlib_node_registration_t tcp4_syn_sent_node;
+extern vlib_node_registration_t tcp6_syn_sent_node;
+extern vlib_node_registration_t tcp4_rcv_process_node;
+extern vlib_node_registration_t tcp6_rcv_process_node;
+extern vlib_node_registration_t tcp4_listen_node;
+extern vlib_node_registration_t tcp6_listen_node;
always_inline tcp_main_t *
vnet_get_tcp_main ()
return &tcp_main;
}
+always_inline tcp_worker_ctx_t *
+tcp_get_worker (u32 thread_index)
+{
+ return &tcp_main.wrk_ctx[thread_index];
+}
+
always_inline tcp_header_t *
tcp_buffer_hdr (vlib_buffer_t * b)
{
+ vnet_buffer (b)->tcp.hdr_offset);
}
+#if (VLIB_BUFFER_TRACE_TRAJECTORY)
+#define tcp_trajectory_add_start(b, start) \
+{ \
+ (*vlib_buffer_trace_trajectory_cb) (b, start); \
+}
+#else
+#define tcp_trajectory_add_start(b, start)
+#endif
+
clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en);
+void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
+
always_inline tcp_connection_t *
tcp_connection_get (u32 conn_index, u32 thread_index)
{
return (tcp_connection_t *) tconn;
}
+always_inline void
+tcp_connection_set_state (tcp_connection_t * tc, tcp_state_t state)
+{
+ tc->state = state;
+ TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc);
+}
+
void tcp_connection_close (tcp_connection_t * tc);
void tcp_connection_cleanup (tcp_connection_t * tc);
void tcp_connection_del (tcp_connection_t * tc);
int tcp_half_open_connection_cleanup (tcp_connection_t * tc);
-tcp_connection_t *tcp_connection_new (u8 thread_index);
+tcp_connection_t *tcp_connection_alloc (u8 thread_index);
+void tcp_connection_free (tcp_connection_t * tc);
void tcp_connection_reset (tcp_connection_t * tc);
int tcp_configure_v4_source_address_range (vlib_main_t * vm,
ip4_address_t * start,
ip6_address_t * start,
ip6_address_t * end, u32 table_id);
void tcp_api_reference (void);
-u8 *format_tcp_connection_id (u8 * s, va_list * args);
u8 *format_tcp_connection (u8 * s, va_list * args);
-u8 *format_tcp_scoreboard (u8 * s, va_list * args);
-
-u8 *tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose);
always_inline tcp_connection_t *
tcp_listener_get (u32 tli)
return tc;
}
-void tcp_make_ack (tcp_connection_t * ts, vlib_buffer_t * b);
void tcp_make_fin (tcp_connection_t * tc, vlib_buffer_t * b);
void tcp_make_synack (tcp_connection_t * ts, vlib_buffer_t * b);
void tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt,
- u8 is_ip4);
+ u32 thread_index, u8 is_ip4);
void tcp_send_reset (tcp_connection_t * tc);
void tcp_send_syn (tcp_connection_t * tc);
+void tcp_send_synack (tcp_connection_t * tc);
void tcp_send_fin (tcp_connection_t * tc);
void tcp_init_mss (tcp_connection_t * tc);
-void tcp_update_snd_mss (tcp_connection_t * tc);
+void tcp_update_burst_snd_vars (tcp_connection_t * tc);
void tcp_update_rto (tcp_connection_t * tc);
-void tcp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, u8 is_ip4);
-void tcp_flush_frames_to_output (u8 thread_index);
+void tcp_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4);
+void tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk);
+void tcp_program_fastretransmit (tcp_worker_ctx_t * wrk,
+ tcp_connection_t * tc);
+void tcp_do_fastretransmits (tcp_worker_ctx_t * wrk);
+
+void tcp_program_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc);
+void tcp_program_dupack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc);
+void tcp_send_acks (tcp_worker_ctx_t * wrk);
+void tcp_send_window_update_ack (tcp_connection_t * tc);
+
+/*
+ * Rate estimation
+ */
+
+/**
+ * Byte tracker initialize
+ *
+ * @param tc connection for which the byte tracker should be allocated and
+ * initialized
+ */
+void tcp_bt_init (tcp_connection_t * tc);
+/**
+ * Byte tracker cleanup
+ *
+ * @param tc connection for which the byte tracker should be cleaned up
+ */
+void tcp_bt_cleanup (tcp_connection_t * tc);
+/**
+ * Flush byte tracker samples
+ *
+ * @param tc tcp connection for which samples should be flushed
+ */
+void tcp_bt_flush_samples (tcp_connection_t * tc);
+/**
+ * Track a tcp tx burst
+ *
+ * @param tc tcp connection
+ */
+void tcp_bt_track_tx (tcp_connection_t * tc);
+/**
+ * Track a tcp retransmission
+ *
+ * @param tc tcp connection
+ * @param start start sequence number
+ * @param end end sequence number
+ */
+void tcp_bt_track_rxt (tcp_connection_t * tc, u32 start, u32 end);
+/**
+ * Generate a delivery rate sample from recently acked bytes
+ *
+ * @param tc tcp connection
+ * @param rs resulting rate sample
+ */
+void tcp_bt_sample_delivery_rate (tcp_connection_t * tc,
+ tcp_rate_sample_t * rs);
+/**
+ * Check if sample to be generated is app limited
+ *
+ * @param tc tcp connection
+ */
+void tcp_bt_check_app_limited (tcp_connection_t * tc);
+/**
+ * Check if the byte tracker is in sane state
+ *
+ * Should be used only for testing
+ *
+ * @param bt byte tracker
+ */
+int tcp_bt_is_sane (tcp_byte_tracker_t * bt);
always_inline u32
tcp_end_seq (tcp_header_t * th, u32 len)
{
int flight_size;
- flight_size = (int) (tc->snd_una_max - tc->snd_una) - tcp_bytes_out (tc)
+ flight_size = (int) (tc->snd_nxt - tc->snd_una) - tcp_bytes_out (tc)
+ tc->snd_rxt_bytes;
if (flight_size < 0)
always_inline u32
tcp_initial_cwnd (const tcp_connection_t * tc)
{
+ if (tcp_main.initial_cwnd_multiplier > 0)
+ return tcp_main.initial_cwnd_multiplier * tc->snd_mss;
+
if (tc->snd_mss > 2190)
return 2 * tc->snd_mss;
else if (tc->snd_mss > 1095)
return 4 * tc->snd_mss;
}
+/*
+ * Accumulate acked bytes for cwnd increase
+ *
+ * Once threshold bytes are accumulated, snd_mss bytes are added
+ * to the cwnd.
+ */
+always_inline void
+tcp_cwnd_accumulate (tcp_connection_t * tc, u32 thresh, u32 bytes)
+{
+ tc->cwnd_acc_bytes += bytes;
+ if (tc->cwnd_acc_bytes >= thresh)
+ {
+ u32 inc = tc->cwnd_acc_bytes / thresh;
+ tc->cwnd_acc_bytes -= inc * thresh;
+ tc->cwnd += inc * tc->snd_mss;
+ tc->cwnd = clib_min (tc->cwnd, tc->tx_fifo_size);
+ }
+}
+
always_inline u32
tcp_loss_wnd (const tcp_connection_t * tc)
{
* Estimate of how many bytes we can still push into the network
*/
always_inline u32
-tcp_available_snd_space (const tcp_connection_t * tc)
+tcp_available_cc_snd_space (const tcp_connection_t * tc)
{
u32 available_wnd = tcp_available_snd_wnd (tc);
u32 flight_size = tcp_flight_size (tc);
return 0;
}
-i32 tcp_rcv_wnd_available (tcp_connection_t * tc);
u32 tcp_snd_space (tcp_connection_t * tc);
-void tcp_update_rcv_wnd (tcp_connection_t * tc);
-
-void tcp_retransmit_first_unacked (tcp_connection_t * tc);
-void tcp_fast_retransmit_no_sack (tcp_connection_t * tc);
-void tcp_fast_retransmit_sack (tcp_connection_t * tc);
-void tcp_fast_retransmit (tcp_connection_t * tc);
+int tcp_retransmit_first_unacked (tcp_worker_ctx_t * wrk,
+ tcp_connection_t * tc);
+int tcp_fast_retransmit_no_sack (tcp_worker_ctx_t * wrk,
+ tcp_connection_t * tc, u32 burst_size);
+int tcp_fast_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
+ u32 burst_size);
+int tcp_fast_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
+ u32 burst_size);
void tcp_cc_init_congestion (tcp_connection_t * tc);
-int tcp_cc_recover (tcp_connection_t * tc);
-void tcp_cc_fastrecovery_exit (tcp_connection_t * tc);
+void tcp_cc_fastrecovery_clear (tcp_connection_t * tc);
fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc);
/* Made public for unit testing only */
void tcp_update_sack_list (tcp_connection_t * tc, u32 start, u32 end);
+u32 tcp_sack_list_bytes (tcp_connection_t * tc);
always_inline u32
tcp_time_now (void)
{
- return tcp_main.time_now[vlib_get_thread_index ()];
+ return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now;
}
always_inline u32
-tcp_set_time_now (u32 thread_index)
+tcp_time_now_w_thread (u32 thread_index)
{
- tcp_main.time_now[thread_index] = clib_cpu_time_now ()
- * tcp_main.tstamp_ticks_per_clock;
- return tcp_main.time_now[thread_index];
+ return tcp_main.wrk_ctx[thread_index].time_now;
}
-always_inline void
-tcp_update_time (f64 now, u32 thread_index)
+/**
+ * Generate timestamp for tcp connection
+ */
+always_inline u32
+tcp_tstamp (tcp_connection_t * tc)
+{
+ return (tcp_main.wrk_ctx[tc->c_thread_index].time_now -
+ tc->timestamp_delta);
+}
+
+always_inline f64
+tcp_time_now_us (u32 thread_index)
{
- tcp_set_time_now (thread_index);
- tw_timer_expire_timers_16t_2w_512sl (&tcp_main.timer_wheels[thread_index],
- now);
- tcp_flush_frames_to_output (thread_index);
+ return transport_time_now (thread_index);
}
-u32 tcp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
+always_inline u32
+tcp_set_time_now (tcp_worker_ctx_t * wrk)
+{
+ wrk->time_now = clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock;
+ return wrk->time_now;
+}
-u32
-tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset,
- u32 max_bytes, vlib_buffer_t ** b);
+u32 tcp_session_push_header (transport_connection_t * tconn,
+ vlib_buffer_t * b);
void tcp_connection_timers_init (tcp_connection_t * tc);
void tcp_connection_timers_reset (tcp_connection_t * tc);
void tcp_init_snd_vars (tcp_connection_t * tc);
void tcp_connection_init_vars (tcp_connection_t * tc);
+void tcp_connection_tx_pacer_update (tcp_connection_t * tc);
+void tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window,
+ u32 start_bucket);
always_inline void
-tcp_connection_force_ack (tcp_connection_t * tc, vlib_buffer_t * b)
+tcp_cc_rcv_ack (tcp_connection_t * tc, tcp_rate_sample_t * rs)
+{
+ tc->cc_algo->rcv_ack (tc, rs);
+ tc->tsecr_last_ack = tc->rcv_opts.tsecr;
+}
+
+static inline void
+tcp_cc_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type,
+ tcp_rate_sample_t * rs)
+{
+ tc->cc_algo->rcv_cong_ack (tc, ack_type, rs);
+}
+
+static inline void
+tcp_cc_loss (tcp_connection_t * tc)
+{
+ tc->cc_algo->loss (tc);
+}
+
+static inline void
+tcp_cc_recovered (tcp_connection_t * tc)
{
- /* Reset flags, make sure ack is sent */
- tc->flags = TCP_CONN_SNDACK;
- vnet_buffer (b)->tcp.flags &= ~TCP_BUF_FLAG_DUPACK;
+ tc->cc_algo->recovered (tc);
+}
+
+static inline void
+tcp_cc_undo_recovery (tcp_connection_t * tc)
+{
+ if (tc->cc_algo->undo_recovery)
+ tc->cc_algo->undo_recovery (tc);
+}
+
+static inline void
+tcp_cc_event (tcp_connection_t * tc, tcp_cc_event_t evt)
+{
+ if (tc->cc_algo->event)
+ tc->cc_algo->event (tc, evt);
}
always_inline void
{
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
- tc->timers[timer_id]
- = tw_timer_start_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
- tc->c_c_index, timer_id, interval);
+ tc->timers[timer_id] =
+ tw_timer_start_16t_2w_512sl (&tcp_main.
+ wrk_ctx[tc->c_thread_index].timer_wheel,
+ tc->c_c_index, timer_id, interval);
}
always_inline void
if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
return;
- tw_timer_stop_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
+ tw_timer_stop_16t_2w_512sl (&tcp_main.
+ wrk_ctx[tc->c_thread_index].timer_wheel,
tc->timers[timer_id]);
tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
}
{
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
- tw_timer_stop_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
- tc->timers[timer_id]);
- tc->timers[timer_id] =
- tw_timer_start_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
- tc->c_c_index, timer_id, interval);
+ tw_timer_update_16t_2w_512sl (&tcp_main.
+ wrk_ctx[tc->c_thread_index].timer_wheel,
+ tc->timers[timer_id], interval);
+ else
+ tc->timers[timer_id] =
+ tw_timer_start_16t_2w_512sl (&tcp_main.
+ wrk_ctx[tc->c_thread_index].timer_wheel,
+ tc->c_c_index, timer_id, interval);
}
always_inline void
always_inline void
tcp_retransmit_timer_update (tcp_connection_t * tc)
{
- if (tc->snd_una == tc->snd_una_max)
+ if (tc->snd_una == tc->snd_nxt)
{
tcp_retransmit_timer_reset (tc);
if (tc->snd_wnd < tc->snd_mss)
#define tcp_validate_txf_size(_tc, _a) \
ASSERT(_tc->state != TCP_STATE_ESTABLISHED \
- || stream_session_tx_fifo_max_dequeue (&_tc->connection) >= _a)
-
-void
-scoreboard_remove_hole (sack_scoreboard_t * sb,
- sack_scoreboard_hole_t * hole);
-void scoreboard_update_lost (tcp_connection_t * tc, sack_scoreboard_t * sb);
-sack_scoreboard_hole_t *scoreboard_insert_hole (sack_scoreboard_t * sb,
- u32 prev_index, u32 start,
- u32 end);
-sack_scoreboard_hole_t *scoreboard_next_rxt_hole (sack_scoreboard_t * sb,
- sack_scoreboard_hole_t *
- start, u8 have_sent_1_smss,
- u8 * can_rescue,
- u8 * snd_limited);
-void scoreboard_init_high_rxt (sack_scoreboard_t * sb, u32 seq);
-
-always_inline sack_scoreboard_hole_t *
-scoreboard_get_hole (sack_scoreboard_t * sb, u32 index)
-{
- if (index != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, index);
- return 0;
-}
-
-always_inline sack_scoreboard_hole_t *
-scoreboard_next_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- if (hole->next != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, hole->next);
- return 0;
-}
-
-always_inline sack_scoreboard_hole_t *
-scoreboard_prev_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- if (hole->prev != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, hole->prev);
- return 0;
-}
-
-always_inline sack_scoreboard_hole_t *
-scoreboard_first_hole (sack_scoreboard_t * sb)
-{
- if (sb->head != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, sb->head);
- return 0;
-}
-
-always_inline sack_scoreboard_hole_t *
-scoreboard_last_hole (sack_scoreboard_t * sb)
-{
- if (sb->tail != TCP_INVALID_SACK_HOLE_INDEX)
- return pool_elt_at_index (sb->holes, sb->tail);
- return 0;
-}
-
-always_inline void
-scoreboard_clear (sack_scoreboard_t * sb)
-{
- sack_scoreboard_hole_t *hole;
- while ((hole = scoreboard_first_hole (sb)))
- {
- scoreboard_remove_hole (sb, hole);
- }
- ASSERT (sb->head == sb->tail && sb->head == TCP_INVALID_SACK_HOLE_INDEX);
- ASSERT (pool_elts (sb->holes) == 0);
- sb->sacked_bytes = 0;
- sb->last_sacked_bytes = 0;
- sb->last_bytes_delivered = 0;
- sb->snd_una_adv = 0;
- sb->high_sacked = 0;
- sb->high_rxt = 0;
- sb->lost_bytes = 0;
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
-}
-
-always_inline u32
-scoreboard_hole_bytes (sack_scoreboard_hole_t * hole)
-{
- return hole->end - hole->start;
-}
-
-always_inline u32
-scoreboard_hole_index (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
-{
- ASSERT (!pool_is_free_index (sb->holes, hole - sb->holes));
- return hole - sb->holes;
-}
-
-always_inline void
-scoreboard_init (sack_scoreboard_t * sb)
-{
- sb->head = TCP_INVALID_SACK_HOLE_INDEX;
- sb->tail = TCP_INVALID_SACK_HOLE_INDEX;
- sb->cur_rxt_hole = TCP_INVALID_SACK_HOLE_INDEX;
-}
+ || transport_max_tx_dequeue (&_tc->connection) >= _a)
void tcp_rcv_sacks (tcp_connection_t * tc, u32 ack);
+u8 *tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose);
-always_inline void
-tcp_cc_algo_register (tcp_cc_algorithm_type_e type,
- const tcp_cc_algorithm_t * vft)
-{
- tcp_main_t *tm = vnet_get_tcp_main ();
- vec_validate (tm->cc_algos, type);
+/**
+ * Register exiting cc algo type
+ */
+void tcp_cc_algo_register (tcp_cc_algorithm_type_e type,
+ const tcp_cc_algorithm_t * vft);
- tm->cc_algos[type] = *vft;
-}
+/**
+ * Register new cc algo type
+ */
+tcp_cc_algorithm_type_e tcp_cc_algo_new_type (const tcp_cc_algorithm_t * vft);
+tcp_cc_algorithm_t *tcp_cc_algo_get (tcp_cc_algorithm_type_e type);
-always_inline tcp_cc_algorithm_t *
-tcp_cc_algo_get (tcp_cc_algorithm_type_e type)
+static inline void *
+tcp_cc_data (tcp_connection_t * tc)
{
- tcp_main_t *tm = vnet_get_tcp_main ();
- return &tm->cc_algos[type];
+ return (void *) tc->cc_data;
}
-void tcp_cc_init (tcp_connection_t * tc);
+void newreno_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type,
+ tcp_rate_sample_t * rs);
/**
* Push TCP header to buffer
Code Review / vpp.git / blobdiff