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8e688d9c DH |
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 | ||
0e119b41 DH |
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 | ||
8e688d9c DH |
23 | /* |
24 | * How long to wait before scheduling ACK generation after seeing a | |
25 | * packet with RXRPC_REQUEST_ACK set (in jiffies). | |
26 | */ | |
27 | unsigned int rxrpc_requested_ack_delay = 1; | |
28 | ||
29 | /* | |
30 | * How long to wait before scheduling an ACK with subtype DELAY (in jiffies). | |
31 | * | |
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. | |
35 | */ | |
36 | unsigned int rxrpc_soft_ack_delay = 1 * HZ; | |
37 | ||
38 | /* | |
39 | * How long to wait before scheduling an ACK with subtype IDLE (in jiffies). | |
40 | * | |
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. | |
44 | */ | |
45 | unsigned int rxrpc_idle_ack_delay = 0.5 * HZ; | |
46 | ||
47 | /* | |
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 | |
51 | * packets. | |
52 | */ | |
75e42126 DH |
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 | |
56 | #endif | |
8e688d9c DH |
57 | |
58 | /* | |
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. | |
61 | */ | |
62 | unsigned int rxrpc_rx_mtu = 5692; | |
63 | ||
64 | /* | |
65 | * The maximum number of fragments in a received jumbo packet that we tell the | |
66 | * sender that we're willing to handle. | |
67 | */ | |
68 | unsigned int rxrpc_rx_jumbo_max = 4; | |
69 | ||
0b58b8a1 DH |
70 | /* |
71 | * Time till packet resend (in jiffies). | |
72 | */ | |
73 | unsigned int rxrpc_resend_timeout = 4 * HZ; | |
74 | ||
5b3e87f1 | 75 | const char *const rxrpc_pkts[] = { |
8e688d9c DH |
76 | "?00", |
77 | "DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG", | |
78 | "?09", "?10", "?11", "?12", "VERSION", "?14", "?15" | |
79 | }; | |
80 | ||
81 | const s8 rxrpc_ack_priority[] = { | |
82 | [0] = 0, | |
83 | [RXRPC_ACK_DELAY] = 1, | |
84 | [RXRPC_ACK_REQUESTED] = 2, | |
85 | [RXRPC_ACK_IDLE] = 3, | |
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, | |
91 | }; | |
92 | ||
93 | const char *rxrpc_acks(u8 reason) | |
94 | { | |
95 | static const char *const str[] = { | |
96 | "---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY", | |
97 | "IDL", "-?-" | |
98 | }; | |
99 | ||
100 | if (reason >= ARRAY_SIZE(str)) | |
101 | reason = ARRAY_SIZE(str) - 1; | |
102 | return str[reason]; | |
103 | } | |
363deeab DH |
104 | |
105 | const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4] = { | |
106 | [rxrpc_conn_new_client] = "NWc", | |
107 | [rxrpc_conn_new_service] = "NWs", | |
108 | [rxrpc_conn_queued] = "QUE", | |
109 | [rxrpc_conn_seen] = "SEE", | |
110 | [rxrpc_conn_got] = "GOT", | |
111 | [rxrpc_conn_put_client] = "PTc", | |
112 | [rxrpc_conn_put_service] = "PTs", | |
113 | }; | |
114 | ||
115 | const char rxrpc_client_traces[rxrpc_client__nr_trace][7] = { | |
116 | [rxrpc_client_activate_chans] = "Activa", | |
117 | [rxrpc_client_alloc] = "Alloc ", | |
118 | [rxrpc_client_chan_activate] = "ChActv", | |
119 | [rxrpc_client_chan_disconnect] = "ChDisc", | |
120 | [rxrpc_client_chan_pass] = "ChPass", | |
121 | [rxrpc_client_chan_unstarted] = "ChUnst", | |
122 | [rxrpc_client_cleanup] = "Clean ", | |
123 | [rxrpc_client_count] = "Count ", | |
124 | [rxrpc_client_discard] = "Discar", | |
125 | [rxrpc_client_duplicate] = "Duplic", | |
126 | [rxrpc_client_exposed] = "Expose", | |
127 | [rxrpc_client_replace] = "Replac", | |
128 | [rxrpc_client_to_active] = "->Actv", | |
129 | [rxrpc_client_to_culled] = "->Cull", | |
130 | [rxrpc_client_to_idle] = "->Idle", | |
131 | [rxrpc_client_to_inactive] = "->Inac", | |
132 | [rxrpc_client_to_waiting] = "->Wait", | |
133 | [rxrpc_client_uncount] = "Uncoun", | |
134 | }; | |
a124fe3e DH |
135 | |
136 | const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4] = { | |
137 | [rxrpc_transmit_wait] = "WAI", | |
138 | [rxrpc_transmit_queue] = "QUE", | |
139 | [rxrpc_transmit_queue_reqack] = "QRA", | |
140 | [rxrpc_transmit_queue_last] = "QLS", | |
141 | [rxrpc_transmit_rotate] = "ROT", | |
142 | [rxrpc_transmit_end] = "END", | |
143 | }; | |
58dc63c9 DH |
144 | |
145 | const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4] = { | |
146 | [rxrpc_receive_incoming] = "INC", | |
147 | [rxrpc_receive_queue] = "QUE", | |
148 | [rxrpc_receive_queue_last] = "QLS", | |
149 | [rxrpc_receive_front] = "FRN", | |
150 | [rxrpc_receive_rotate] = "ROT", | |
151 | [rxrpc_receive_end] = "END", | |
152 | }; |