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 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; 21 22 /* 23 * RxRPC operating parameters. 24 * 25 * See Documentation/networking/rxrpc.txt and the variable definitions for more 26 * information on the individual parameters. 27 */ 28 static struct ctl_table rxrpc_sysctl_table[] = { 29 /* Values measured in milliseconds but used in jiffies */ 30 { 31 .procname = "req_ack_delay", 32 .data = &rxrpc_requested_ack_delay, 33 .maxlen = sizeof(unsigned long), 34 .mode = 0644, 35 .proc_handler = proc_doulongvec_ms_jiffies_minmax, 36 .extra1 = (void *)&one_jiffy, 37 .extra2 = (void *)&max_jiffies, 38 }, 39 { 40 .procname = "soft_ack_delay", 41 .data = &rxrpc_soft_ack_delay, 42 .maxlen = sizeof(unsigned long), 43 .mode = 0644, 44 .proc_handler = proc_doulongvec_ms_jiffies_minmax, 45 .extra1 = (void *)&one_jiffy, 46 .extra2 = (void *)&max_jiffies, 47 }, 48 { 49 .procname = "idle_ack_delay", 50 .data = &rxrpc_idle_ack_delay, 51 .maxlen = sizeof(unsigned long), 52 .mode = 0644, 53 .proc_handler = proc_doulongvec_ms_jiffies_minmax, 54 .extra1 = (void *)&one_jiffy, 55 .extra2 = (void *)&max_jiffies, 56 }, 57 { 58 .procname = "idle_conn_expiry", 59 .data = &rxrpc_conn_idle_client_expiry, 60 .maxlen = sizeof(unsigned long), 61 .mode = 0644, 62 .proc_handler = proc_doulongvec_ms_jiffies_minmax, 63 .extra1 = (void *)&one_jiffy, 64 .extra2 = (void *)&max_jiffies, 65 }, 66 { 67 .procname = "idle_conn_fast_expiry", 68 .data = &rxrpc_conn_idle_client_fast_expiry, 69 .maxlen = sizeof(unsigned long), 70 .mode = 0644, 71 .proc_handler = proc_doulongvec_ms_jiffies_minmax, 72 .extra1 = (void *)&one_jiffy, 73 .extra2 = (void *)&max_jiffies, 74 }, 75 { 76 .procname = "resend_timeout", 77 .data = &rxrpc_resend_timeout, 78 .maxlen = sizeof(unsigned long), 79 .mode = 0644, 80 .proc_handler = proc_doulongvec_ms_jiffies_minmax, 81 .extra1 = (void *)&one_jiffy, 82 .extra2 = (void *)&max_jiffies, 83 }, 84 85 /* Non-time values */ 86 { 87 .procname = "max_client_conns", 88 .data = &rxrpc_max_client_connections, 89 .maxlen = sizeof(unsigned int), 90 .mode = 0644, 91 .proc_handler = proc_dointvec_minmax, 92 .extra1 = (void *)&rxrpc_reap_client_connections, 93 }, 94 { 95 .procname = "reap_client_conns", 96 .data = &rxrpc_reap_client_connections, 97 .maxlen = sizeof(unsigned int), 98 .mode = 0644, 99 .proc_handler = proc_dointvec_minmax, 100 .extra1 = (void *)&one, 101 .extra2 = (void *)&rxrpc_max_client_connections, 102 }, 103 { 104 .procname = "max_backlog", 105 .data = &rxrpc_max_backlog, 106 .maxlen = sizeof(unsigned int), 107 .mode = 0644, 108 .proc_handler = proc_dointvec_minmax, 109 .extra1 = (void *)&four, 110 .extra2 = (void *)&thirtytwo, 111 }, 112 { 113 .procname = "rx_window_size", 114 .data = &rxrpc_rx_window_size, 115 .maxlen = sizeof(unsigned int), 116 .mode = 0644, 117 .proc_handler = proc_dointvec_minmax, 118 .extra1 = (void *)&one, 119 .extra2 = (void *)&n_max_acks, 120 }, 121 { 122 .procname = "rx_mtu", 123 .data = &rxrpc_rx_mtu, 124 .maxlen = sizeof(unsigned int), 125 .mode = 0644, 126 .proc_handler = proc_dointvec_minmax, 127 .extra1 = (void *)&one, 128 .extra2 = (void *)&n_65535, 129 }, 130 { 131 .procname = "rx_jumbo_max", 132 .data = &rxrpc_rx_jumbo_max, 133 .maxlen = sizeof(unsigned int), 134 .mode = 0644, 135 .proc_handler = proc_dointvec_minmax, 136 .extra1 = (void *)&one, 137 .extra2 = (void *)&four, 138 }, 139 140 { } 141 }; 142 143 int __init rxrpc_sysctl_init(void) 144 { 145 rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc", 146 rxrpc_sysctl_table); 147 if (!rxrpc_sysctl_reg_table) 148 return -ENOMEM; 149 return 0; 150 } 151 152 void rxrpc_sysctl_exit(void) 153 { 154 if (rxrpc_sysctl_reg_table) 155 unregister_net_sysctl_table(rxrpc_sysctl_reg_table); 156 } 157