3 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #include <linux/kernel.h>
14 #include <net/af_rxrpc.h>
15 #include "ar-internal.h"
18 * The maximum listening backlog queue size that may be set on a socket by
21 unsigned int rxrpc_max_backlog __read_mostly
= 10;
24 * How long to wait before scheduling ACK generation after seeing a
25 * packet with RXRPC_REQUEST_ACK set (in jiffies).
27 unsigned int rxrpc_requested_ack_delay
= 1;
30 * How long to wait before scheduling an ACK with subtype DELAY (in jiffies).
32 * We use this when we've received new data packets. If those packets aren't
33 * all consumed within this time we will send a DELAY ACK if an ACK was not
34 * requested to let the sender know it doesn't need to resend.
36 unsigned int rxrpc_soft_ack_delay
= 1 * HZ
;
39 * How long to wait before scheduling an ACK with subtype IDLE (in jiffies).
41 * We use this when we've consumed some previously soft-ACK'd packets when
42 * further packets aren't immediately received to decide when to send an IDLE
43 * ACK let the other end know that it can free up its Tx buffer space.
45 unsigned int rxrpc_idle_ack_delay
= 0.5 * HZ
;
48 * Receive window size in packets. This indicates the maximum number of
49 * unconsumed received packets we're willing to retain in memory. Once this
50 * limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further
53 unsigned int rxrpc_rx_window_size
= RXRPC_INIT_RX_WINDOW_SIZE
;
54 #if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE
55 #error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE
59 * Maximum Rx MTU size. This indicates to the sender the size of jumbo packet
60 * made by gluing normal packets together that we're willing to handle.
62 unsigned int rxrpc_rx_mtu
= 5692;
65 * The maximum number of fragments in a received jumbo packet that we tell the
66 * sender that we're willing to handle.
68 unsigned int rxrpc_rx_jumbo_max
= 4;
71 * Time till packet resend (in jiffies).
73 unsigned int rxrpc_resend_timeout
= 4 * HZ
;
75 const char *const rxrpc_pkts
[] = {
77 "DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG",
78 "?09", "?10", "?11", "?12", "VERSION", "?14", "?15"
81 const s8 rxrpc_ack_priority
[] = {
83 [RXRPC_ACK_DELAY
] = 1,
84 [RXRPC_ACK_REQUESTED
] = 2,
86 [RXRPC_ACK_PING_RESPONSE
] = 4,
87 [RXRPC_ACK_DUPLICATE
] = 5,
88 [RXRPC_ACK_OUT_OF_SEQUENCE
] = 6,
89 [RXRPC_ACK_EXCEEDS_WINDOW
] = 7,
90 [RXRPC_ACK_NOSPACE
] = 8,
93 const char *rxrpc_acks(u8 reason
)
95 static const char *const str
[] = {
96 "---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY",
100 if (reason
>= ARRAY_SIZE(str
))
101 reason
= ARRAY_SIZE(str
) - 1;
105 const char rxrpc_skb_traces
[rxrpc_skb__nr_trace
][7] = {
106 [rxrpc_skb_rx_cleaned
] = "Rx CLN",
107 [rxrpc_skb_rx_freed
] = "Rx FRE",
108 [rxrpc_skb_rx_got
] = "Rx GOT",
109 [rxrpc_skb_rx_lost
] = "Rx *L*",
110 [rxrpc_skb_rx_received
] = "Rx RCV",
111 [rxrpc_skb_rx_purged
] = "Rx PUR",
112 [rxrpc_skb_rx_rotated
] = "Rx ROT",
113 [rxrpc_skb_rx_seen
] = "Rx SEE",
114 [rxrpc_skb_tx_cleaned
] = "Tx CLN",
115 [rxrpc_skb_tx_freed
] = "Tx FRE",
116 [rxrpc_skb_tx_got
] = "Tx GOT",
117 [rxrpc_skb_tx_lost
] = "Tx *L*",
118 [rxrpc_skb_tx_new
] = "Tx NEW",
119 [rxrpc_skb_tx_rotated
] = "Tx ROT",
120 [rxrpc_skb_tx_seen
] = "Tx SEE",
123 const char rxrpc_conn_traces
[rxrpc_conn__nr_trace
][4] = {
124 [rxrpc_conn_new_client
] = "NWc",
125 [rxrpc_conn_new_service
] = "NWs",
126 [rxrpc_conn_queued
] = "QUE",
127 [rxrpc_conn_seen
] = "SEE",
128 [rxrpc_conn_got
] = "GOT",
129 [rxrpc_conn_put_client
] = "PTc",
130 [rxrpc_conn_put_service
] = "PTs",
133 const char rxrpc_client_traces
[rxrpc_client__nr_trace
][7] = {
134 [rxrpc_client_activate_chans
] = "Activa",
135 [rxrpc_client_alloc
] = "Alloc ",
136 [rxrpc_client_chan_activate
] = "ChActv",
137 [rxrpc_client_chan_disconnect
] = "ChDisc",
138 [rxrpc_client_chan_pass
] = "ChPass",
139 [rxrpc_client_chan_unstarted
] = "ChUnst",
140 [rxrpc_client_cleanup
] = "Clean ",
141 [rxrpc_client_count
] = "Count ",
142 [rxrpc_client_discard
] = "Discar",
143 [rxrpc_client_duplicate
] = "Duplic",
144 [rxrpc_client_exposed
] = "Expose",
145 [rxrpc_client_replace
] = "Replac",
146 [rxrpc_client_to_active
] = "->Actv",
147 [rxrpc_client_to_culled
] = "->Cull",
148 [rxrpc_client_to_idle
] = "->Idle",
149 [rxrpc_client_to_inactive
] = "->Inac",
150 [rxrpc_client_to_waiting
] = "->Wait",
151 [rxrpc_client_uncount
] = "Uncoun",
154 const char rxrpc_transmit_traces
[rxrpc_transmit__nr_trace
][4] = {
155 [rxrpc_transmit_wait
] = "WAI",
156 [rxrpc_transmit_queue
] = "QUE",
157 [rxrpc_transmit_queue_reqack
] = "QRA",
158 [rxrpc_transmit_queue_last
] = "QLS",
159 [rxrpc_transmit_rotate
] = "ROT",
160 [rxrpc_transmit_end
] = "END",
163 const char rxrpc_receive_traces
[rxrpc_receive__nr_trace
][4] = {
164 [rxrpc_receive_incoming
] = "INC",
165 [rxrpc_receive_queue
] = "QUE",
166 [rxrpc_receive_queue_last
] = "QLS",
167 [rxrpc_receive_front
] = "FRN",
168 [rxrpc_receive_rotate
] = "ROT",
169 [rxrpc_receive_end
] = "END",
172 const char rxrpc_recvmsg_traces
[rxrpc_recvmsg__nr_trace
][5] = {
173 [rxrpc_recvmsg_enter
] = "ENTR",
174 [rxrpc_recvmsg_wait
] = "WAIT",
175 [rxrpc_recvmsg_dequeue
] = "DEQU",
176 [rxrpc_recvmsg_hole
] = "HOLE",
177 [rxrpc_recvmsg_next
] = "NEXT",
178 [rxrpc_recvmsg_cont
] = "CONT",
179 [rxrpc_recvmsg_full
] = "FULL",
180 [rxrpc_recvmsg_data_return
] = "DATA",
181 [rxrpc_recvmsg_terminal
] = "TERM",
182 [rxrpc_recvmsg_to_be_accepted
] = "TBAC",
183 [rxrpc_recvmsg_return
] = "RETN",
186 const char rxrpc_rtt_tx_traces
[rxrpc_rtt_tx__nr_trace
][5] = {
187 [rxrpc_rtt_tx_ping
] = "PING",
190 const char rxrpc_rtt_rx_traces
[rxrpc_rtt_rx__nr_trace
][5] = {
191 [rxrpc_rtt_rx_ping_response
] = "PONG",