diff options
Diffstat (limited to 'net/rxrpc/ar-internal.h')
| -rw-r--r-- | net/rxrpc/ar-internal.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 042dbcc52654..ca96e547cb9a 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -402,6 +402,7 @@ enum rxrpc_call_flag { RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ RXRPC_CALL_PINGING, /* Ping in process */ + RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ }; /* @@ -447,6 +448,17 @@ enum rxrpc_call_completion { }; /* + * Call Tx congestion management modes. + */ +enum rxrpc_congest_mode { + RXRPC_CALL_SLOW_START, + RXRPC_CALL_CONGEST_AVOIDANCE, + RXRPC_CALL_PACKET_LOSS, + RXRPC_CALL_FAST_RETRANSMIT, + NR__RXRPC_CONGEST_MODES +}; + +/* * RxRPC call definition * - matched by { connection, call_id } */ @@ -518,6 +530,20 @@ struct rxrpc_call { * not hard-ACK'd packet follows this. */ rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ + + /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS + * is fixed, we keep these numbers in terms of segments (ie. DATA + * packets) rather than bytes. + */ +#define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN + u8 cong_cwnd; /* Congestion window size */ + u8 cong_extra; /* Extra to send for congestion management */ + u8 cong_ssthresh; /* Slow-start threshold */ + enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ + u8 cong_dup_acks; /* Count of ACKs showing missing packets */ + u8 cong_cumul_acks; /* Cumulative ACK count */ + ktime_t cong_tstamp; /* Last time cwnd was changed */ + rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not * consumed packet follows this. */ @@ -533,11 +559,36 @@ struct rxrpc_call { u16 ackr_skew; /* skew on packet being ACK'd */ rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ + rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ + rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ rxrpc_serial_t ackr_ping; /* Last ping sent */ ktime_t ackr_ping_time; /* Time last ping sent */ /* transmission-phase ACK management */ + ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ + rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ +}; + +/* + * Summary of a new ACK and the changes it made to the Tx buffer packet states. + */ +struct rxrpc_ack_summary { + u8 ack_reason; + u8 nr_acks; /* Number of ACKs in packet */ + u8 nr_nacks; /* Number of NACKs in packet */ + u8 nr_new_acks; /* Number of new ACKs in packet */ + u8 nr_new_nacks; /* Number of new NACKs in packet */ + u8 nr_rot_new_acks; /* Number of rotated new ACKs */ + bool new_low_nack; /* T if new low NACK found */ + bool retrans_timeo; /* T if reTx due to timeout happened */ + u8 flight_size; /* Number of unreceived transmissions */ + /* Place to stash values for tracing */ + enum rxrpc_congest_mode mode:8; + u8 cwnd; + u8 ssthresh; + u8 dup_acks; + u8 cumulative_acks; }; enum rxrpc_skb_trace { @@ -680,6 +731,7 @@ extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5]; enum rxrpc_timer_trace { rxrpc_timer_begin, + rxrpc_timer_init_for_reply, rxrpc_timer_expired, rxrpc_timer_set_for_ack, rxrpc_timer_set_for_resend, @@ -690,11 +742,15 @@ enum rxrpc_timer_trace { extern const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8]; enum rxrpc_propose_ack_trace { + rxrpc_propose_ack_client_tx_end, rxrpc_propose_ack_input_data, + rxrpc_propose_ack_ping_for_lost_ack, + rxrpc_propose_ack_ping_for_lost_reply, rxrpc_propose_ack_ping_for_params, rxrpc_propose_ack_respond_to_ack, rxrpc_propose_ack_respond_to_ping, rxrpc_propose_ack_retry_tx, + rxrpc_propose_ack_rotate_rx, rxrpc_propose_ack_terminal_ack, rxrpc_propose_ack__nr_trace }; @@ -709,6 +765,21 @@ enum rxrpc_propose_ack_outcome { extern const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8]; extern const char *const rxrpc_propose_ack_outcomes[rxrpc_propose_ack__nr_outcomes]; +enum rxrpc_congest_change { + rxrpc_cong_begin_retransmission, + rxrpc_cong_cleared_nacks, + rxrpc_cong_new_low_nack, + rxrpc_cong_no_change, + rxrpc_cong_progress, + rxrpc_cong_retransmit_again, + rxrpc_cong_rtt_window_end, + rxrpc_cong_saw_nack, + rxrpc_congest__nr_change +}; + +extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10]; +extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9]; + extern const char *const rxrpc_pkts[]; extern const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4]; |