xref: /openbmc/linux/net/rxrpc/sysctl.c (revision af094824)
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 
13 static struct ctl_table_header *rxrpc_sysctl_reg_table;
14 static const unsigned int four = 4;
15 static const unsigned int max_backlog = RXRPC_BACKLOG_MAX - 1;
16 static const unsigned int n_65535 = 65535;
17 static const unsigned int n_max_acks = 255;
18 static const unsigned long one_jiffy = 1;
19 static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
20 #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY
21 static const unsigned long max_500 = 500;
22 #endif
23 
24 /*
25  * RxRPC operating parameters.
26  *
27  * See Documentation/networking/rxrpc.rst and the variable definitions for more
28  * information on the individual parameters.
29  */
30 static struct ctl_table rxrpc_sysctl_table[] = {
31 	/* Values measured in milliseconds but used in jiffies */
32 	{
33 		.procname	= "soft_ack_delay",
34 		.data		= &rxrpc_soft_ack_delay,
35 		.maxlen		= sizeof(unsigned long),
36 		.mode		= 0644,
37 		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
38 		.extra1		= (void *)&one_jiffy,
39 		.extra2		= (void *)&max_jiffies,
40 	},
41 	{
42 		.procname	= "idle_ack_delay",
43 		.data		= &rxrpc_idle_ack_delay,
44 		.maxlen		= sizeof(unsigned long),
45 		.mode		= 0644,
46 		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
47 		.extra1		= (void *)&one_jiffy,
48 		.extra2		= (void *)&max_jiffies,
49 	},
50 	{
51 		.procname	= "idle_conn_expiry",
52 		.data		= &rxrpc_conn_idle_client_expiry,
53 		.maxlen		= sizeof(unsigned long),
54 		.mode		= 0644,
55 		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
56 		.extra1		= (void *)&one_jiffy,
57 		.extra2		= (void *)&max_jiffies,
58 	},
59 	{
60 		.procname	= "idle_conn_fast_expiry",
61 		.data		= &rxrpc_conn_idle_client_fast_expiry,
62 		.maxlen		= sizeof(unsigned long),
63 		.mode		= 0644,
64 		.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
65 		.extra1		= (void *)&one_jiffy,
66 		.extra2		= (void *)&max_jiffies,
67 	},
68 
69 	/* Values used in milliseconds */
70 #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY
71 	{
72 		.procname	= "inject_rx_delay",
73 		.data		= &rxrpc_inject_rx_delay,
74 		.maxlen		= sizeof(unsigned long),
75 		.mode		= 0644,
76 		.proc_handler	= proc_doulongvec_minmax,
77 		.extra1		= (void *)SYSCTL_LONG_ZERO,
78 		.extra2		= (void *)&max_500,
79 	},
80 #endif
81 
82 	/* Non-time values */
83 	{
84 		.procname	= "reap_client_conns",
85 		.data		= &rxrpc_reap_client_connections,
86 		.maxlen		= sizeof(unsigned int),
87 		.mode		= 0644,
88 		.proc_handler	= proc_dointvec_minmax,
89 		.extra1		= (void *)SYSCTL_ONE,
90 		.extra2		= (void *)&n_65535,
91 	},
92 	{
93 		.procname	= "max_backlog",
94 		.data		= &rxrpc_max_backlog,
95 		.maxlen		= sizeof(unsigned int),
96 		.mode		= 0644,
97 		.proc_handler	= proc_dointvec_minmax,
98 		.extra1		= (void *)&four,
99 		.extra2		= (void *)&max_backlog,
100 	},
101 	{
102 		.procname	= "rx_window_size",
103 		.data		= &rxrpc_rx_window_size,
104 		.maxlen		= sizeof(unsigned int),
105 		.mode		= 0644,
106 		.proc_handler	= proc_dointvec_minmax,
107 		.extra1		= (void *)SYSCTL_ONE,
108 		.extra2		= (void *)&n_max_acks,
109 	},
110 	{
111 		.procname	= "rx_mtu",
112 		.data		= &rxrpc_rx_mtu,
113 		.maxlen		= sizeof(unsigned int),
114 		.mode		= 0644,
115 		.proc_handler	= proc_dointvec_minmax,
116 		.extra1		= (void *)SYSCTL_ONE,
117 		.extra2		= (void *)&n_65535,
118 	},
119 	{
120 		.procname	= "rx_jumbo_max",
121 		.data		= &rxrpc_rx_jumbo_max,
122 		.maxlen		= sizeof(unsigned int),
123 		.mode		= 0644,
124 		.proc_handler	= proc_dointvec_minmax,
125 		.extra1		= (void *)SYSCTL_ONE,
126 		.extra2		= (void *)&four,
127 	},
128 	{ }
129 };
130 
rxrpc_sysctl_init(void)131 int __init rxrpc_sysctl_init(void)
132 {
133 	rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
134 						     rxrpc_sysctl_table);
135 	if (!rxrpc_sysctl_reg_table)
136 		return -ENOMEM;
137 	return 0;
138 }
139 
rxrpc_sysctl_exit(void)140 void rxrpc_sysctl_exit(void)
141 {
142 	if (rxrpc_sysctl_reg_table)
143 		unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
144 }
145