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1 | /* sysctls for configuring RxRPC operating parameters |
2 | * | |
3 | * Copyright (C) 2014 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/sysctl.h> | |
13 | #include <net/sock.h> | |
14 | #include <net/af_rxrpc.h> | |
15 | #include "ar-internal.h" | |
16 | ||
17 | static struct ctl_table_header *rxrpc_sysctl_reg_table; | |
dad8aff7 DH |
18 | static const unsigned int zero = 0; |
19 | static const unsigned int one = 1; | |
20 | static const unsigned int four = 4; | |
0e119b41 | 21 | static const unsigned int thirtytwo = 32; |
dad8aff7 DH |
22 | static const unsigned int n_65535 = 65535; |
23 | static const unsigned int n_max_acks = RXRPC_MAXACKS; | |
5873c083 DH |
24 | |
25 | /* | |
26 | * RxRPC operating parameters. | |
27 | * | |
28 | * See Documentation/networking/rxrpc.txt and the variable definitions for more | |
29 | * information on the individual parameters. | |
30 | */ | |
31 | static struct ctl_table rxrpc_sysctl_table[] = { | |
32 | /* Values measured in milliseconds */ | |
33 | { | |
34 | .procname = "req_ack_delay", | |
35 | .data = &rxrpc_requested_ack_delay, | |
dad8aff7 | 36 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
37 | .mode = 0644, |
38 | .proc_handler = proc_dointvec_ms_jiffies, | |
39 | .extra1 = (void *)&zero, | |
40 | }, | |
41 | { | |
42 | .procname = "soft_ack_delay", | |
43 | .data = &rxrpc_soft_ack_delay, | |
dad8aff7 | 44 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
45 | .mode = 0644, |
46 | .proc_handler = proc_dointvec_ms_jiffies, | |
47 | .extra1 = (void *)&one, | |
48 | }, | |
49 | { | |
50 | .procname = "idle_ack_delay", | |
51 | .data = &rxrpc_idle_ack_delay, | |
dad8aff7 | 52 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
53 | .mode = 0644, |
54 | .proc_handler = proc_dointvec_ms_jiffies, | |
55 | .extra1 = (void *)&one, | |
56 | }, | |
57 | { | |
58 | .procname = "resend_timeout", | |
59 | .data = &rxrpc_resend_timeout, | |
dad8aff7 | 60 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
61 | .mode = 0644, |
62 | .proc_handler = proc_dointvec_ms_jiffies, | |
63 | .extra1 = (void *)&one, | |
64 | }, | |
65 | ||
66 | /* Values measured in seconds but used in jiffies */ | |
67 | { | |
68 | .procname = "max_call_lifetime", | |
69 | .data = &rxrpc_max_call_lifetime, | |
dad8aff7 | 70 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
71 | .mode = 0644, |
72 | .proc_handler = proc_dointvec_jiffies, | |
73 | .extra1 = (void *)&one, | |
74 | }, | |
75 | { | |
76 | .procname = "dead_call_expiry", | |
77 | .data = &rxrpc_dead_call_expiry, | |
dad8aff7 | 78 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
79 | .mode = 0644, |
80 | .proc_handler = proc_dointvec_jiffies, | |
81 | .extra1 = (void *)&one, | |
82 | }, | |
83 | ||
84 | /* Values measured in seconds */ | |
85 | { | |
86 | .procname = "connection_expiry", | |
87 | .data = &rxrpc_connection_expiry, | |
dad8aff7 | 88 | .maxlen = sizeof(unsigned int), |
5873c083 DH |
89 | .mode = 0644, |
90 | .proc_handler = proc_dointvec_minmax, | |
91 | .extra1 = (void *)&one, | |
92 | }, | |
817913d8 DH |
93 | |
94 | /* Non-time values */ | |
0e119b41 DH |
95 | { |
96 | .procname = "max_backlog", | |
97 | .data = &rxrpc_max_backlog, | |
98 | .maxlen = sizeof(unsigned int), | |
99 | .mode = 0644, | |
100 | .proc_handler = proc_dointvec_minmax, | |
101 | .extra1 = (void *)&four, | |
102 | .extra2 = (void *)&thirtytwo, | |
103 | }, | |
817913d8 DH |
104 | { |
105 | .procname = "rx_window_size", | |
106 | .data = &rxrpc_rx_window_size, | |
dad8aff7 | 107 | .maxlen = sizeof(unsigned int), |
817913d8 DH |
108 | .mode = 0644, |
109 | .proc_handler = proc_dointvec_minmax, | |
110 | .extra1 = (void *)&one, | |
111 | .extra2 = (void *)&n_max_acks, | |
112 | }, | |
113 | { | |
114 | .procname = "rx_mtu", | |
115 | .data = &rxrpc_rx_mtu, | |
dad8aff7 | 116 | .maxlen = sizeof(unsigned int), |
817913d8 DH |
117 | .mode = 0644, |
118 | .proc_handler = proc_dointvec_minmax, | |
119 | .extra1 = (void *)&one, | |
ee6fe085 | 120 | .extra2 = (void *)&n_65535, |
817913d8 DH |
121 | }, |
122 | { | |
123 | .procname = "rx_jumbo_max", | |
124 | .data = &rxrpc_rx_jumbo_max, | |
dad8aff7 | 125 | .maxlen = sizeof(unsigned int), |
817913d8 DH |
126 | .mode = 0644, |
127 | .proc_handler = proc_dointvec_minmax, | |
128 | .extra1 = (void *)&one, | |
129 | .extra2 = (void *)&four, | |
130 | }, | |
131 | ||
5873c083 DH |
132 | { } |
133 | }; | |
134 | ||
135 | int __init rxrpc_sysctl_init(void) | |
136 | { | |
137 | rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc", | |
138 | rxrpc_sysctl_table); | |
139 | if (!rxrpc_sysctl_reg_table) | |
140 | return -ENOMEM; | |
141 | return 0; | |
142 | } | |
143 | ||
144 | void rxrpc_sysctl_exit(void) | |
145 | { | |
146 | if (rxrpc_sysctl_reg_table) | |
147 | unregister_net_sysctl_table(rxrpc_sysctl_reg_table); | |
148 | } |