1 /* Miscellaneous bits 2 * 3 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <net/sock.h> 14 #include <net/af_rxrpc.h> 15 #include "ar-internal.h" 16 17 /* 18 * The maximum listening backlog queue size that may be set on a socket by 19 * listen(). 20 */ 21 unsigned int rxrpc_max_backlog __read_mostly = 10; 22 23 /* 24 * Maximum lifetime of a call (in mx). 25 */ 26 unsigned int rxrpc_max_call_lifetime = 60 * 1000; 27 28 /* 29 * How long to wait before scheduling ACK generation after seeing a 30 * packet with RXRPC_REQUEST_ACK set (in ms). 31 */ 32 unsigned int rxrpc_requested_ack_delay = 1; 33 34 /* 35 * How long to wait before scheduling an ACK with subtype DELAY (in ms). 36 * 37 * We use this when we've received new data packets. If those packets aren't 38 * all consumed within this time we will send a DELAY ACK if an ACK was not 39 * requested to let the sender know it doesn't need to resend. 40 */ 41 unsigned int rxrpc_soft_ack_delay = 1 * 1000; 42 43 /* 44 * How long to wait before scheduling an ACK with subtype IDLE (in ms). 45 * 46 * We use this when we've consumed some previously soft-ACK'd packets when 47 * further packets aren't immediately received to decide when to send an IDLE 48 * ACK let the other end know that it can free up its Tx buffer space. 49 */ 50 unsigned int rxrpc_idle_ack_delay = 0.5 * 1000; 51 52 /* 53 * Receive window size in packets. This indicates the maximum number of 54 * unconsumed received packets we're willing to retain in memory. Once this 55 * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further 56 * packets. 57 */ 58 unsigned int rxrpc_rx_window_size = RXRPC_INIT_RX_WINDOW_SIZE; 59 #if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE 60 #error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE 61 #endif 62 63 /* 64 * Maximum Rx MTU size. This indicates to the sender the size of jumbo packet 65 * made by gluing normal packets together that we're willing to handle. 66 */ 67 unsigned int rxrpc_rx_mtu = 5692; 68 69 /* 70 * The maximum number of fragments in a received jumbo packet that we tell the 71 * sender that we're willing to handle. 72 */ 73 unsigned int rxrpc_rx_jumbo_max = 4; 74 75 /* 76 * Time till packet resend (in milliseconds). 77 */ 78 unsigned int rxrpc_resend_timeout = 4 * 1000; 79 80 const char *const rxrpc_pkts[] = { 81 "?00", 82 "DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG", 83 "?09", "?10", "?11", "?12", "VERSION", "?14", "?15" 84 }; 85 86 const s8 rxrpc_ack_priority[] = { 87 [0] = 0, 88 [RXRPC_ACK_DELAY] = 1, 89 [RXRPC_ACK_REQUESTED] = 2, 90 [RXRPC_ACK_IDLE] = 3, 91 [RXRPC_ACK_DUPLICATE] = 4, 92 [RXRPC_ACK_OUT_OF_SEQUENCE] = 5, 93 [RXRPC_ACK_EXCEEDS_WINDOW] = 6, 94 [RXRPC_ACK_NOSPACE] = 7, 95 [RXRPC_ACK_PING_RESPONSE] = 8, 96 [RXRPC_ACK_PING] = 9, 97 }; 98 99 const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4] = { 100 "---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY", 101 "IDL", "-?-" 102 }; 103 104 const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7] = { 105 [rxrpc_skb_rx_cleaned] = "Rx CLN", 106 [rxrpc_skb_rx_freed] = "Rx FRE", 107 [rxrpc_skb_rx_got] = "Rx GOT", 108 [rxrpc_skb_rx_lost] = "Rx *L*", 109 [rxrpc_skb_rx_received] = "Rx RCV", 110 [rxrpc_skb_rx_purged] = "Rx PUR", 111 [rxrpc_skb_rx_rotated] = "Rx ROT", 112 [rxrpc_skb_rx_seen] = "Rx SEE", 113 [rxrpc_skb_tx_cleaned] = "Tx CLN", 114 [rxrpc_skb_tx_freed] = "Tx FRE", 115 [rxrpc_skb_tx_got] = "Tx GOT", 116 [rxrpc_skb_tx_new] = "Tx NEW", 117 [rxrpc_skb_tx_rotated] = "Tx ROT", 118 [rxrpc_skb_tx_seen] = "Tx SEE", 119 }; 120 121 const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4] = { 122 [rxrpc_conn_new_client] = "NWc", 123 [rxrpc_conn_new_service] = "NWs", 124 [rxrpc_conn_queued] = "QUE", 125 [rxrpc_conn_seen] = "SEE", 126 [rxrpc_conn_got] = "GOT", 127 [rxrpc_conn_put_client] = "PTc", 128 [rxrpc_conn_put_service] = "PTs", 129 }; 130 131 const char rxrpc_client_traces[rxrpc_client__nr_trace][7] = { 132 [rxrpc_client_activate_chans] = "Activa", 133 [rxrpc_client_alloc] = "Alloc ", 134 [rxrpc_client_chan_activate] = "ChActv", 135 [rxrpc_client_chan_disconnect] = "ChDisc", 136 [rxrpc_client_chan_pass] = "ChPass", 137 [rxrpc_client_chan_unstarted] = "ChUnst", 138 [rxrpc_client_cleanup] = "Clean ", 139 [rxrpc_client_count] = "Count ", 140 [rxrpc_client_discard] = "Discar", 141 [rxrpc_client_duplicate] = "Duplic", 142 [rxrpc_client_exposed] = "Expose", 143 [rxrpc_client_replace] = "Replac", 144 [rxrpc_client_to_active] = "->Actv", 145 [rxrpc_client_to_culled] = "->Cull", 146 [rxrpc_client_to_idle] = "->Idle", 147 [rxrpc_client_to_inactive] = "->Inac", 148 [rxrpc_client_to_waiting] = "->Wait", 149 [rxrpc_client_uncount] = "Uncoun", 150 }; 151 152 const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4] = { 153 [rxrpc_transmit_wait] = "WAI", 154 [rxrpc_transmit_queue] = "QUE", 155 [rxrpc_transmit_queue_last] = "QLS", 156 [rxrpc_transmit_rotate] = "ROT", 157 [rxrpc_transmit_rotate_last] = "RLS", 158 [rxrpc_transmit_await_reply] = "AWR", 159 [rxrpc_transmit_end] = "END", 160 }; 161 162 const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4] = { 163 [rxrpc_receive_incoming] = "INC", 164 [rxrpc_receive_queue] = "QUE", 165 [rxrpc_receive_queue_last] = "QLS", 166 [rxrpc_receive_front] = "FRN", 167 [rxrpc_receive_rotate] = "ROT", 168 [rxrpc_receive_end] = "END", 169 }; 170 171 const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5] = { 172 [rxrpc_recvmsg_enter] = "ENTR", 173 [rxrpc_recvmsg_wait] = "WAIT", 174 [rxrpc_recvmsg_dequeue] = "DEQU", 175 [rxrpc_recvmsg_hole] = "HOLE", 176 [rxrpc_recvmsg_next] = "NEXT", 177 [rxrpc_recvmsg_cont] = "CONT", 178 [rxrpc_recvmsg_full] = "FULL", 179 [rxrpc_recvmsg_data_return] = "DATA", 180 [rxrpc_recvmsg_terminal] = "TERM", 181 [rxrpc_recvmsg_to_be_accepted] = "TBAC", 182 [rxrpc_recvmsg_return] = "RETN", 183 }; 184 185 const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5] = { 186 [rxrpc_rtt_tx_ping] = "PING", 187 [rxrpc_rtt_tx_data] = "DATA", 188 }; 189 190 const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5] = { 191 [rxrpc_rtt_rx_ping_response] = "PONG", 192 [rxrpc_rtt_rx_requested_ack] = "RACK", 193 }; 194 195 const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8] = { 196 [rxrpc_timer_begin] = "Begin ", 197 [rxrpc_timer_expired] = "*EXPR*", 198 [rxrpc_timer_init_for_reply] = "IniRpl", 199 [rxrpc_timer_set_for_ack] = "SetAck", 200 [rxrpc_timer_set_for_send] = "SetTx ", 201 [rxrpc_timer_set_for_resend] = "SetRTx", 202 }; 203 204 const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8] = { 205 [rxrpc_propose_ack_client_tx_end] = "ClTxEnd", 206 [rxrpc_propose_ack_input_data] = "DataIn ", 207 [rxrpc_propose_ack_ping_for_lost_ack] = "LostAck", 208 [rxrpc_propose_ack_ping_for_lost_reply] = "LostRpl", 209 [rxrpc_propose_ack_ping_for_params] = "Params ", 210 [rxrpc_propose_ack_respond_to_ack] = "Rsp2Ack", 211 [rxrpc_propose_ack_respond_to_ping] = "Rsp2Png", 212 [rxrpc_propose_ack_retry_tx] = "RetryTx", 213 [rxrpc_propose_ack_rotate_rx] = "RxAck ", 214 [rxrpc_propose_ack_terminal_ack] = "ClTerm ", 215 }; 216 217 const char *const rxrpc_propose_ack_outcomes[rxrpc_propose_ack__nr_outcomes] = { 218 [rxrpc_propose_ack_use] = "", 219 [rxrpc_propose_ack_update] = " Update", 220 [rxrpc_propose_ack_subsume] = " Subsume", 221 }; 222 223 const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10] = { 224 [RXRPC_CALL_SLOW_START] = "SlowStart", 225 [RXRPC_CALL_CONGEST_AVOIDANCE] = "CongAvoid", 226 [RXRPC_CALL_PACKET_LOSS] = "PktLoss ", 227 [RXRPC_CALL_FAST_RETRANSMIT] = "FastReTx ", 228 }; 229 230 const char rxrpc_congest_changes[rxrpc_congest__nr_change][9] = { 231 [rxrpc_cong_begin_retransmission] = " Retrans", 232 [rxrpc_cong_cleared_nacks] = " Cleared", 233 [rxrpc_cong_new_low_nack] = " NewLowN", 234 [rxrpc_cong_no_change] = "", 235 [rxrpc_cong_progress] = " Progres", 236 [rxrpc_cong_retransmit_again] = " ReTxAgn", 237 [rxrpc_cong_rtt_window_end] = " RttWinE", 238 [rxrpc_cong_saw_nack] = " SawNack", 239 }; 240