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 thirtytwo = 32; 16 static const unsigned int n_65535 = 65535; 17 static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1; 18 static const unsigned long one_jiffy = 1; 19 static const unsigned long max_jiffies = MAX_JIFFY_OFFSET; 20 21 /* 22 * RxRPC operating parameters. 23 * 24 * See Documentation/networking/rxrpc.rst and the variable definitions for more 25 * information on the individual parameters. 26 */ 27 static 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 /* Non-time values */ 76 { 77 .procname = "max_client_conns", 78 .data = &rxrpc_max_client_connections, 79 .maxlen = sizeof(unsigned int), 80 .mode = 0644, 81 .proc_handler = proc_dointvec_minmax, 82 .extra1 = (void *)&rxrpc_reap_client_connections, 83 }, 84 { 85 .procname = "reap_client_conns", 86 .data = &rxrpc_reap_client_connections, 87 .maxlen = sizeof(unsigned int), 88 .mode = 0644, 89 .proc_handler = proc_dointvec_minmax, 90 .extra1 = (void *)SYSCTL_ONE, 91 .extra2 = (void *)&rxrpc_max_client_connections, 92 }, 93 { 94 .procname = "max_backlog", 95 .data = &rxrpc_max_backlog, 96 .maxlen = sizeof(unsigned int), 97 .mode = 0644, 98 .proc_handler = proc_dointvec_minmax, 99 .extra1 = (void *)&four, 100 .extra2 = (void *)&thirtytwo, 101 }, 102 { 103 .procname = "rx_window_size", 104 .data = &rxrpc_rx_window_size, 105 .maxlen = sizeof(unsigned int), 106 .mode = 0644, 107 .proc_handler = proc_dointvec_minmax, 108 .extra1 = (void *)SYSCTL_ONE, 109 .extra2 = (void *)&n_max_acks, 110 }, 111 { 112 .procname = "rx_mtu", 113 .data = &rxrpc_rx_mtu, 114 .maxlen = sizeof(unsigned int), 115 .mode = 0644, 116 .proc_handler = proc_dointvec_minmax, 117 .extra1 = (void *)SYSCTL_ONE, 118 .extra2 = (void *)&n_65535, 119 }, 120 { 121 .procname = "rx_jumbo_max", 122 .data = &rxrpc_rx_jumbo_max, 123 .maxlen = sizeof(unsigned int), 124 .mode = 0644, 125 .proc_handler = proc_dointvec_minmax, 126 .extra1 = (void *)SYSCTL_ONE, 127 .extra2 = (void *)&four, 128 }, 129 130 { } 131 }; 132 133 int __init rxrpc_sysctl_init(void) 134 { 135 rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc", 136 rxrpc_sysctl_table); 137 if (!rxrpc_sysctl_reg_table) 138 return -ENOMEM; 139 return 0; 140 } 141 142 void rxrpc_sysctl_exit(void) 143 { 144 if (rxrpc_sysctl_reg_table) 145 unregister_net_sysctl_table(rxrpc_sysctl_reg_table); 146 } 147