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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* sysctls for configuring RxRPC operating parameters
3 *
4 * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <linux/sysctl.h>
9#include <net/sock.h>
10#include <net/af_rxrpc.h>
11#include "ar-internal.h"
12
13static struct ctl_table_header *rxrpc_sysctl_reg_table;
14static const unsigned int four = 4;
15static const unsigned int thirtytwo = 32;
16static const unsigned int n_65535 = 65535;
17static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
18static const unsigned long one_jiffy = 1;
19static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
20
21/*
22 * RxRPC operating parameters.
23 *
24 * See Documentation/networking/rxrpc.txt and the variable definitions for more
25 * information on the individual parameters.
26 */
27static struct ctl_table rxrpc_sysctl_table[] = {
28 /* Values measured in milliseconds but used in jiffies */
29 {
30 .procname = "req_ack_delay",
31 .data = &rxrpc_requested_ack_delay,
32 .maxlen = sizeof(unsigned long),
33 .mode = 0644,
34 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
35 .extra1 = (void *)&one_jiffy,
36 .extra2 = (void *)&max_jiffies,
37 },
38 {
39 .procname = "soft_ack_delay",
40 .data = &rxrpc_soft_ack_delay,
41 .maxlen = sizeof(unsigned long),
42 .mode = 0644,
43 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
44 .extra1 = (void *)&one_jiffy,
45 .extra2 = (void *)&max_jiffies,
46 },
47 {
48 .procname = "idle_ack_delay",
49 .data = &rxrpc_idle_ack_delay,
50 .maxlen = sizeof(unsigned long),
51 .mode = 0644,
52 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
53 .extra1 = (void *)&one_jiffy,
54 .extra2 = (void *)&max_jiffies,
55 },
56 {
57 .procname = "idle_conn_expiry",
58 .data = &rxrpc_conn_idle_client_expiry,
59 .maxlen = sizeof(unsigned long),
60 .mode = 0644,
61 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
62 .extra1 = (void *)&one_jiffy,
63 .extra2 = (void *)&max_jiffies,
64 },
65 {
66 .procname = "idle_conn_fast_expiry",
67 .data = &rxrpc_conn_idle_client_fast_expiry,
68 .maxlen = sizeof(unsigned long),
69 .mode = 0644,
70 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
71 .extra1 = (void *)&one_jiffy,
72 .extra2 = (void *)&max_jiffies,
73 },
74 {
75 .procname = "resend_timeout",
76 .data = &rxrpc_resend_timeout,
77 .maxlen = sizeof(unsigned long),
78 .mode = 0644,
79 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
80 .extra1 = (void *)&one_jiffy,
81 .extra2 = (void *)&max_jiffies,
82 },
83
84 /* Non-time values */
85 {
86 .procname = "max_client_conns",
87 .data = &rxrpc_max_client_connections,
88 .maxlen = sizeof(unsigned int),
89 .mode = 0644,
90 .proc_handler = proc_dointvec_minmax,
91 .extra1 = (void *)&rxrpc_reap_client_connections,
92 },
93 {
94 .procname = "reap_client_conns",
95 .data = &rxrpc_reap_client_connections,
96 .maxlen = sizeof(unsigned int),
97 .mode = 0644,
98 .proc_handler = proc_dointvec_minmax,
99 .extra1 = (void *)SYSCTL_ONE,
100 .extra2 = (void *)&rxrpc_max_client_connections,
101 },
102 {
103 .procname = "max_backlog",
104 .data = &rxrpc_max_backlog,
105 .maxlen = sizeof(unsigned int),
106 .mode = 0644,
107 .proc_handler = proc_dointvec_minmax,
108 .extra1 = (void *)&four,
109 .extra2 = (void *)&thirtytwo,
110 },
111 {
112 .procname = "rx_window_size",
113 .data = &rxrpc_rx_window_size,
114 .maxlen = sizeof(unsigned int),
115 .mode = 0644,
116 .proc_handler = proc_dointvec_minmax,
117 .extra1 = (void *)SYSCTL_ONE,
118 .extra2 = (void *)&n_max_acks,
119 },
120 {
121 .procname = "rx_mtu",
122 .data = &rxrpc_rx_mtu,
123 .maxlen = sizeof(unsigned int),
124 .mode = 0644,
125 .proc_handler = proc_dointvec_minmax,
126 .extra1 = (void *)SYSCTL_ONE,
127 .extra2 = (void *)&n_65535,
128 },
129 {
130 .procname = "rx_jumbo_max",
131 .data = &rxrpc_rx_jumbo_max,
132 .maxlen = sizeof(unsigned int),
133 .mode = 0644,
134 .proc_handler = proc_dointvec_minmax,
135 .extra1 = (void *)SYSCTL_ONE,
136 .extra2 = (void *)&four,
137 },
138
139 { }
140};
141
142int __init rxrpc_sysctl_init(void)
143{
144 rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
145 rxrpc_sysctl_table);
146 if (!rxrpc_sysctl_reg_table)
147 return -ENOMEM;
148 return 0;
149}
150
151void rxrpc_sysctl_exit(void)
152{
153 if (rxrpc_sysctl_reg_table)
154 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
155}
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
17static struct ctl_table_header *rxrpc_sysctl_reg_table;
18static const unsigned int zero = 0;
19static const unsigned int one = 1;
20static const unsigned int four = 4;
21static const unsigned int thirtytwo = 32;
22static const unsigned int n_65535 = 65535;
23static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
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 */
31static struct ctl_table rxrpc_sysctl_table[] = {
32 /* Values measured in milliseconds */
33 {
34 .procname = "req_ack_delay",
35 .data = &rxrpc_requested_ack_delay,
36 .maxlen = sizeof(unsigned int),
37 .mode = 0644,
38 .proc_handler = proc_dointvec,
39 .extra1 = (void *)&zero,
40 },
41 {
42 .procname = "soft_ack_delay",
43 .data = &rxrpc_soft_ack_delay,
44 .maxlen = sizeof(unsigned int),
45 .mode = 0644,
46 .proc_handler = proc_dointvec,
47 .extra1 = (void *)&one,
48 },
49 {
50 .procname = "idle_ack_delay",
51 .data = &rxrpc_idle_ack_delay,
52 .maxlen = sizeof(unsigned int),
53 .mode = 0644,
54 .proc_handler = proc_dointvec,
55 .extra1 = (void *)&one,
56 },
57 {
58 .procname = "resend_timeout",
59 .data = &rxrpc_resend_timeout,
60 .maxlen = sizeof(unsigned int),
61 .mode = 0644,
62 .proc_handler = proc_dointvec,
63 .extra1 = (void *)&one,
64 },
65 {
66 .procname = "idle_conn_expiry",
67 .data = &rxrpc_conn_idle_client_expiry,
68 .maxlen = sizeof(unsigned int),
69 .mode = 0644,
70 .proc_handler = proc_dointvec_ms_jiffies,
71 .extra1 = (void *)&one,
72 },
73 {
74 .procname = "idle_conn_fast_expiry",
75 .data = &rxrpc_conn_idle_client_fast_expiry,
76 .maxlen = sizeof(unsigned int),
77 .mode = 0644,
78 .proc_handler = proc_dointvec_ms_jiffies,
79 .extra1 = (void *)&one,
80 },
81
82 /* Values measured in seconds but used in jiffies */
83 {
84 .procname = "max_call_lifetime",
85 .data = &rxrpc_max_call_lifetime,
86 .maxlen = sizeof(unsigned int),
87 .mode = 0644,
88 .proc_handler = proc_dointvec,
89 .extra1 = (void *)&one,
90 },
91
92 /* Non-time values */
93 {
94 .procname = "max_client_conns",
95 .data = &rxrpc_max_client_connections,
96 .maxlen = sizeof(unsigned int),
97 .mode = 0644,
98 .proc_handler = proc_dointvec_minmax,
99 .extra1 = (void *)&rxrpc_reap_client_connections,
100 },
101 {
102 .procname = "reap_client_conns",
103 .data = &rxrpc_reap_client_connections,
104 .maxlen = sizeof(unsigned int),
105 .mode = 0644,
106 .proc_handler = proc_dointvec_minmax,
107 .extra1 = (void *)&one,
108 .extra2 = (void *)&rxrpc_max_client_connections,
109 },
110 {
111 .procname = "max_backlog",
112 .data = &rxrpc_max_backlog,
113 .maxlen = sizeof(unsigned int),
114 .mode = 0644,
115 .proc_handler = proc_dointvec_minmax,
116 .extra1 = (void *)&four,
117 .extra2 = (void *)&thirtytwo,
118 },
119 {
120 .procname = "rx_window_size",
121 .data = &rxrpc_rx_window_size,
122 .maxlen = sizeof(unsigned int),
123 .mode = 0644,
124 .proc_handler = proc_dointvec_minmax,
125 .extra1 = (void *)&one,
126 .extra2 = (void *)&n_max_acks,
127 },
128 {
129 .procname = "rx_mtu",
130 .data = &rxrpc_rx_mtu,
131 .maxlen = sizeof(unsigned int),
132 .mode = 0644,
133 .proc_handler = proc_dointvec_minmax,
134 .extra1 = (void *)&one,
135 .extra2 = (void *)&n_65535,
136 },
137 {
138 .procname = "rx_jumbo_max",
139 .data = &rxrpc_rx_jumbo_max,
140 .maxlen = sizeof(unsigned int),
141 .mode = 0644,
142 .proc_handler = proc_dointvec_minmax,
143 .extra1 = (void *)&one,
144 .extra2 = (void *)&four,
145 },
146
147 { }
148};
149
150int __init rxrpc_sysctl_init(void)
151{
152 rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
153 rxrpc_sysctl_table);
154 if (!rxrpc_sysctl_reg_table)
155 return -ENOMEM;
156 return 0;
157}
158
159void rxrpc_sysctl_exit(void)
160{
161 if (rxrpc_sysctl_reg_table)
162 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
163}