1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* sysctls for configuring RxRPC operating parameters
4 * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/sysctl.h>
10 #include <net/af_rxrpc.h>
11 #include "ar-internal.h"
13 static struct ctl_table_header *rxrpc_sysctl_reg_table;
14 static const unsigned int one = 1;
15 static const unsigned int four = 4;
16 static const unsigned int thirtytwo = 32;
17 static const unsigned int n_65535 = 65535;
18 static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
19 static const unsigned long one_jiffy = 1;
20 static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
23 * RxRPC operating parameters.
25 * See Documentation/networking/rxrpc.txt and the variable definitions for more
26 * information on the individual parameters.
28 static struct ctl_table rxrpc_sysctl_table[] = {
29 /* Values measured in milliseconds but used in jiffies */
31 .procname = "req_ack_delay",
32 .data = &rxrpc_requested_ack_delay,
33 .maxlen = sizeof(unsigned long),
35 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
36 .extra1 = (void *)&one_jiffy,
37 .extra2 = (void *)&max_jiffies,
40 .procname = "soft_ack_delay",
41 .data = &rxrpc_soft_ack_delay,
42 .maxlen = sizeof(unsigned long),
44 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
45 .extra1 = (void *)&one_jiffy,
46 .extra2 = (void *)&max_jiffies,
49 .procname = "idle_ack_delay",
50 .data = &rxrpc_idle_ack_delay,
51 .maxlen = sizeof(unsigned long),
53 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
54 .extra1 = (void *)&one_jiffy,
55 .extra2 = (void *)&max_jiffies,
58 .procname = "idle_conn_expiry",
59 .data = &rxrpc_conn_idle_client_expiry,
60 .maxlen = sizeof(unsigned long),
62 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
63 .extra1 = (void *)&one_jiffy,
64 .extra2 = (void *)&max_jiffies,
67 .procname = "idle_conn_fast_expiry",
68 .data = &rxrpc_conn_idle_client_fast_expiry,
69 .maxlen = sizeof(unsigned long),
71 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
72 .extra1 = (void *)&one_jiffy,
73 .extra2 = (void *)&max_jiffies,
76 .procname = "resend_timeout",
77 .data = &rxrpc_resend_timeout,
78 .maxlen = sizeof(unsigned long),
80 .proc_handler = proc_doulongvec_ms_jiffies_minmax,
81 .extra1 = (void *)&one_jiffy,
82 .extra2 = (void *)&max_jiffies,
87 .procname = "max_client_conns",
88 .data = &rxrpc_max_client_connections,
89 .maxlen = sizeof(unsigned int),
91 .proc_handler = proc_dointvec_minmax,
92 .extra1 = (void *)&rxrpc_reap_client_connections,
95 .procname = "reap_client_conns",
96 .data = &rxrpc_reap_client_connections,
97 .maxlen = sizeof(unsigned int),
99 .proc_handler = proc_dointvec_minmax,
100 .extra1 = (void *)&one,
101 .extra2 = (void *)&rxrpc_max_client_connections,
104 .procname = "max_backlog",
105 .data = &rxrpc_max_backlog,
106 .maxlen = sizeof(unsigned int),
108 .proc_handler = proc_dointvec_minmax,
109 .extra1 = (void *)&four,
110 .extra2 = (void *)&thirtytwo,
113 .procname = "rx_window_size",
114 .data = &rxrpc_rx_window_size,
115 .maxlen = sizeof(unsigned int),
117 .proc_handler = proc_dointvec_minmax,
118 .extra1 = (void *)&one,
119 .extra2 = (void *)&n_max_acks,
122 .procname = "rx_mtu",
123 .data = &rxrpc_rx_mtu,
124 .maxlen = sizeof(unsigned int),
126 .proc_handler = proc_dointvec_minmax,
127 .extra1 = (void *)&one,
128 .extra2 = (void *)&n_65535,
131 .procname = "rx_jumbo_max",
132 .data = &rxrpc_rx_jumbo_max,
133 .maxlen = sizeof(unsigned int),
135 .proc_handler = proc_dointvec_minmax,
136 .extra1 = (void *)&one,
137 .extra2 = (void *)&four,
143 int __init rxrpc_sysctl_init(void)
145 rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
147 if (!rxrpc_sysctl_reg_table)
152 void rxrpc_sysctl_exit(void)
154 if (rxrpc_sysctl_reg_table)
155 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);