| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* sysctls for configuring RxRPC operating parameters |
| * |
| * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| */ |
| |
| #include <linux/sysctl.h> |
| #include <net/sock.h> |
| #include <net/af_rxrpc.h> |
| #include "ar-internal.h" |
| |
| static struct ctl_table_header *rxrpc_sysctl_reg_table; |
| static const unsigned int four = 4; |
| static const unsigned int thirtytwo = 32; |
| static const unsigned int n_65535 = 65535; |
| static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1; |
| static const unsigned long one_jiffy = 1; |
| static const unsigned long max_jiffies = MAX_JIFFY_OFFSET; |
| |
| /* |
| * RxRPC operating parameters. |
| * |
| * See Documentation/networking/rxrpc.txt and the variable definitions for more |
| * information on the individual parameters. |
| */ |
| static struct ctl_table rxrpc_sysctl_table[] = { |
| /* Values measured in milliseconds but used in jiffies */ |
| { |
| .procname = "req_ack_delay", |
| .data = &rxrpc_requested_ack_delay, |
| .maxlen = sizeof(unsigned long), |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
| .extra1 = (void *)&one_jiffy, |
| .extra2 = (void *)&max_jiffies, |
| }, |
| { |
| .procname = "soft_ack_delay", |
| .data = &rxrpc_soft_ack_delay, |
| .maxlen = sizeof(unsigned long), |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
| .extra1 = (void *)&one_jiffy, |
| .extra2 = (void *)&max_jiffies, |
| }, |
| { |
| .procname = "idle_ack_delay", |
| .data = &rxrpc_idle_ack_delay, |
| .maxlen = sizeof(unsigned long), |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
| .extra1 = (void *)&one_jiffy, |
| .extra2 = (void *)&max_jiffies, |
| }, |
| { |
| .procname = "idle_conn_expiry", |
| .data = &rxrpc_conn_idle_client_expiry, |
| .maxlen = sizeof(unsigned long), |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
| .extra1 = (void *)&one_jiffy, |
| .extra2 = (void *)&max_jiffies, |
| }, |
| { |
| .procname = "idle_conn_fast_expiry", |
| .data = &rxrpc_conn_idle_client_fast_expiry, |
| .maxlen = sizeof(unsigned long), |
| .mode = 0644, |
| .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
| .extra1 = (void *)&one_jiffy, |
| .extra2 = (void *)&max_jiffies, |
| }, |
| |
| /* Non-time values */ |
| { |
| .procname = "max_client_conns", |
| .data = &rxrpc_max_client_connections, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = (void *)&rxrpc_reap_client_connections, |
| }, |
| { |
| .procname = "reap_client_conns", |
| .data = &rxrpc_reap_client_connections, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = (void *)SYSCTL_ONE, |
| .extra2 = (void *)&rxrpc_max_client_connections, |
| }, |
| { |
| .procname = "max_backlog", |
| .data = &rxrpc_max_backlog, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = (void *)&four, |
| .extra2 = (void *)&thirtytwo, |
| }, |
| { |
| .procname = "rx_window_size", |
| .data = &rxrpc_rx_window_size, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = (void *)SYSCTL_ONE, |
| .extra2 = (void *)&n_max_acks, |
| }, |
| { |
| .procname = "rx_mtu", |
| .data = &rxrpc_rx_mtu, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = (void *)SYSCTL_ONE, |
| .extra2 = (void *)&n_65535, |
| }, |
| { |
| .procname = "rx_jumbo_max", |
| .data = &rxrpc_rx_jumbo_max, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = proc_dointvec_minmax, |
| .extra1 = (void *)SYSCTL_ONE, |
| .extra2 = (void *)&four, |
| }, |
| |
| { } |
| }; |
| |
| int __init rxrpc_sysctl_init(void) |
| { |
| rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc", |
| rxrpc_sysctl_table); |
| if (!rxrpc_sysctl_reg_table) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| void rxrpc_sysctl_exit(void) |
| { |
| if (rxrpc_sysctl_reg_table) |
| unregister_net_sysctl_table(rxrpc_sysctl_reg_table); |
| } |