// 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 #include #include #include "ar-internal.h" static struct ctl_table_header *rxrpc_sysctl_reg_table; static const unsigned int four = 4; static const unsigned int max_backlog = RXRPC_BACKLOG_MAX - 1; 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.rst 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 = "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 = "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 *)&n_65535, }, { .procname = "max_backlog", .data = &rxrpc_max_backlog, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = (void *)&four, .extra2 = (void *)&max_backlog, }, { .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); }