/* Miscellaneous bits * * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #include #include #include #include "ar-internal.h" /* * The maximum listening backlog queue size that may be set on a socket by * listen(). */ unsigned int rxrpc_max_backlog __read_mostly = 10; /* * How long to wait before scheduling ACK generation after seeing a * packet with RXRPC_REQUEST_ACK set (in jiffies). */ unsigned int rxrpc_requested_ack_delay = 1; /* * How long to wait before scheduling an ACK with subtype DELAY (in jiffies). * * We use this when we've received new data packets. If those packets aren't * all consumed within this time we will send a DELAY ACK if an ACK was not * requested to let the sender know it doesn't need to resend. */ unsigned int rxrpc_soft_ack_delay = 1 * HZ; /* * How long to wait before scheduling an ACK with subtype IDLE (in jiffies). * * We use this when we've consumed some previously soft-ACK'd packets when * further packets aren't immediately received to decide when to send an IDLE * ACK let the other end know that it can free up its Tx buffer space. */ unsigned int rxrpc_idle_ack_delay = 0.5 * HZ; /* * Receive window size in packets. This indicates the maximum number of * unconsumed received packets we're willing to retain in memory. Once this * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further * packets. */ unsigned int rxrpc_rx_window_size = RXRPC_INIT_RX_WINDOW_SIZE; #if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE #error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE #endif /* * Maximum Rx MTU size. This indicates to the sender the size of jumbo packet * made by gluing normal packets together that we're willing to handle. */ unsigned int rxrpc_rx_mtu = 5692; /* * The maximum number of fragments in a received jumbo packet that we tell the * sender that we're willing to handle. */ unsigned int rxrpc_rx_jumbo_max = 4; /* * Time till packet resend (in milliseconds). */ unsigned int rxrpc_resend_timeout = 4 * 1000; const char *const rxrpc_pkts[] = { "?00", "DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG", "?09", "?10", "?11", "?12", "VERSION", "?14", "?15" }; const s8 rxrpc_ack_priority[] = { [0] = 0, [RXRPC_ACK_DELAY] = 1, [RXRPC_ACK_REQUESTED] = 2, [RXRPC_ACK_IDLE] = 3, [RXRPC_ACK_DUPLICATE] = 4, [RXRPC_ACK_OUT_OF_SEQUENCE] = 5, [RXRPC_ACK_EXCEEDS_WINDOW] = 6, [RXRPC_ACK_NOSPACE] = 7, [RXRPC_ACK_PING_RESPONSE] = 8, [RXRPC_ACK_PING] = 9, }; const char *rxrpc_acks(u8 reason) { static const char *const str[] = { "---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY", "IDL", "-?-" }; if (reason >= ARRAY_SIZE(str)) reason = ARRAY_SIZE(str) - 1; return str[reason]; } const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7] = { [rxrpc_skb_rx_cleaned] = "Rx CLN", [rxrpc_skb_rx_freed] = "Rx FRE", [rxrpc_skb_rx_got] = "Rx GOT", [rxrpc_skb_rx_lost] = "Rx *L*", [rxrpc_skb_rx_received] = "Rx RCV", [rxrpc_skb_rx_purged] = "Rx PUR", [rxrpc_skb_rx_rotated] = "Rx ROT", [rxrpc_skb_rx_seen] = "Rx SEE", [rxrpc_skb_tx_cleaned] = "Tx CLN", [rxrpc_skb_tx_freed] = "Tx FRE", [rxrpc_skb_tx_got] = "Tx GOT", [rxrpc_skb_tx_lost] = "Tx *L*", [rxrpc_skb_tx_new] = "Tx NEW", [rxrpc_skb_tx_rotated] = "Tx ROT", [rxrpc_skb_tx_seen] = "Tx SEE", }; const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4] = { [rxrpc_conn_new_client] = "NWc", [rxrpc_conn_new_service] = "NWs", [rxrpc_conn_queued] = "QUE", [rxrpc_conn_seen] = "SEE", [rxrpc_conn_got] = "GOT", [rxrpc_conn_put_client] = "PTc", [rxrpc_conn_put_service] = "PTs", }; const char rxrpc_client_traces[rxrpc_client__nr_trace][7] = { [rxrpc_client_activate_chans] = "Activa", [rxrpc_client_alloc] = "Alloc ", [rxrpc_client_chan_activate] = "ChActv", [rxrpc_client_chan_disconnect] = "ChDisc", [rxrpc_client_chan_pass] = "ChPass", [rxrpc_client_chan_unstarted] = "ChUnst", [rxrpc_client_cleanup] = "Clean ", [rxrpc_client_count] = "Count ", [rxrpc_client_discard] = "Discar", [rxrpc_client_duplicate] = "Duplic", [rxrpc_client_exposed] = "Expose", [rxrpc_client_replace] = "Replac", [rxrpc_client_to_active] = "->Actv", [rxrpc_client_to_culled] = "->Cull", [rxrpc_client_to_idle] = "->Idle", [rxrpc_client_to_inactive] = "->Inac", [rxrpc_client_to_waiting] = "->Wait", [rxrpc_client_uncount] = "Uncoun", }; const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4] = { [rxrpc_transmit_wait] = "WAI", [rxrpc_transmit_queue] = "QUE", [rxrpc_transmit_queue_last] = "QLS", [rxrpc_transmit_rotate] = "ROT", [rxrpc_transmit_rotate_last] = "RLS", [rxrpc_transmit_await_reply] = "AWR", [rxrpc_transmit_end] = "END", }; const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4] = { [rxrpc_receive_incoming] = "INC", [rxrpc_receive_queue] = "QUE", [rxrpc_receive_queue_last] = "QLS", [rxrpc_receive_front] = "FRN", [rxrpc_receive_rotate] = "ROT", [rxrpc_receive_end] = "END", }; const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5] = { [rxrpc_recvmsg_enter] = "ENTR", [rxrpc_recvmsg_wait] = "WAIT", [rxrpc_recvmsg_dequeue] = "DEQU", [rxrpc_recvmsg_hole] = "HOLE", [rxrpc_recvmsg_next] = "NEXT", [rxrpc_recvmsg_cont] = "CONT", [rxrpc_recvmsg_full] = "FULL", [rxrpc_recvmsg_data_return] = "DATA", [rxrpc_recvmsg_terminal] = "TERM", [rxrpc_recvmsg_to_be_accepted] = "TBAC", [rxrpc_recvmsg_return] = "RETN", }; const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5] = { [rxrpc_rtt_tx_ping] = "PING", [rxrpc_rtt_tx_data] = "DATA", }; const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5] = { [rxrpc_rtt_rx_ping_response] = "PONG", [rxrpc_rtt_rx_requested_ack] = "RACK", }; const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8] = { [rxrpc_timer_begin] = "Begin ", [rxrpc_timer_expired] = "*EXPR*", [rxrpc_timer_set_for_ack] = "SetAck", [rxrpc_timer_set_for_send] = "SetTx ", [rxrpc_timer_set_for_resend] = "SetRTx", };