1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /* sysctls for configuring RxRPC operating parameters
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
5*4882a593Smuzhiyun * Written by David Howells (dhowells@redhat.com)
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/sysctl.h>
9*4882a593Smuzhiyun #include <net/sock.h>
10*4882a593Smuzhiyun #include <net/af_rxrpc.h>
11*4882a593Smuzhiyun #include "ar-internal.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun static struct ctl_table_header *rxrpc_sysctl_reg_table;
14*4882a593Smuzhiyun static const unsigned int four = 4;
15*4882a593Smuzhiyun static const unsigned int max_backlog = RXRPC_BACKLOG_MAX - 1;
16*4882a593Smuzhiyun static const unsigned int n_65535 = 65535;
17*4882a593Smuzhiyun static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
18*4882a593Smuzhiyun static const unsigned long one_jiffy = 1;
19*4882a593Smuzhiyun static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /*
22*4882a593Smuzhiyun * RxRPC operating parameters.
23*4882a593Smuzhiyun *
24*4882a593Smuzhiyun * See Documentation/networking/rxrpc.rst and the variable definitions for more
25*4882a593Smuzhiyun * information on the individual parameters.
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun static struct ctl_table rxrpc_sysctl_table[] = {
28*4882a593Smuzhiyun /* Values measured in milliseconds but used in jiffies */
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun .procname = "req_ack_delay",
31*4882a593Smuzhiyun .data = &rxrpc_requested_ack_delay,
32*4882a593Smuzhiyun .maxlen = sizeof(unsigned long),
33*4882a593Smuzhiyun .mode = 0644,
34*4882a593Smuzhiyun .proc_handler = proc_doulongvec_ms_jiffies_minmax,
35*4882a593Smuzhiyun .extra1 = (void *)&one_jiffy,
36*4882a593Smuzhiyun .extra2 = (void *)&max_jiffies,
37*4882a593Smuzhiyun },
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun .procname = "soft_ack_delay",
40*4882a593Smuzhiyun .data = &rxrpc_soft_ack_delay,
41*4882a593Smuzhiyun .maxlen = sizeof(unsigned long),
42*4882a593Smuzhiyun .mode = 0644,
43*4882a593Smuzhiyun .proc_handler = proc_doulongvec_ms_jiffies_minmax,
44*4882a593Smuzhiyun .extra1 = (void *)&one_jiffy,
45*4882a593Smuzhiyun .extra2 = (void *)&max_jiffies,
46*4882a593Smuzhiyun },
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun .procname = "idle_ack_delay",
49*4882a593Smuzhiyun .data = &rxrpc_idle_ack_delay,
50*4882a593Smuzhiyun .maxlen = sizeof(unsigned long),
51*4882a593Smuzhiyun .mode = 0644,
52*4882a593Smuzhiyun .proc_handler = proc_doulongvec_ms_jiffies_minmax,
53*4882a593Smuzhiyun .extra1 = (void *)&one_jiffy,
54*4882a593Smuzhiyun .extra2 = (void *)&max_jiffies,
55*4882a593Smuzhiyun },
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun .procname = "idle_conn_expiry",
58*4882a593Smuzhiyun .data = &rxrpc_conn_idle_client_expiry,
59*4882a593Smuzhiyun .maxlen = sizeof(unsigned long),
60*4882a593Smuzhiyun .mode = 0644,
61*4882a593Smuzhiyun .proc_handler = proc_doulongvec_ms_jiffies_minmax,
62*4882a593Smuzhiyun .extra1 = (void *)&one_jiffy,
63*4882a593Smuzhiyun .extra2 = (void *)&max_jiffies,
64*4882a593Smuzhiyun },
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun .procname = "idle_conn_fast_expiry",
67*4882a593Smuzhiyun .data = &rxrpc_conn_idle_client_fast_expiry,
68*4882a593Smuzhiyun .maxlen = sizeof(unsigned long),
69*4882a593Smuzhiyun .mode = 0644,
70*4882a593Smuzhiyun .proc_handler = proc_doulongvec_ms_jiffies_minmax,
71*4882a593Smuzhiyun .extra1 = (void *)&one_jiffy,
72*4882a593Smuzhiyun .extra2 = (void *)&max_jiffies,
73*4882a593Smuzhiyun },
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun /* Non-time values */
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun .procname = "reap_client_conns",
78*4882a593Smuzhiyun .data = &rxrpc_reap_client_connections,
79*4882a593Smuzhiyun .maxlen = sizeof(unsigned int),
80*4882a593Smuzhiyun .mode = 0644,
81*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
82*4882a593Smuzhiyun .extra1 = (void *)SYSCTL_ONE,
83*4882a593Smuzhiyun .extra2 = (void *)&n_65535,
84*4882a593Smuzhiyun },
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun .procname = "max_backlog",
87*4882a593Smuzhiyun .data = &rxrpc_max_backlog,
88*4882a593Smuzhiyun .maxlen = sizeof(unsigned int),
89*4882a593Smuzhiyun .mode = 0644,
90*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
91*4882a593Smuzhiyun .extra1 = (void *)&four,
92*4882a593Smuzhiyun .extra2 = (void *)&max_backlog,
93*4882a593Smuzhiyun },
94*4882a593Smuzhiyun {
95*4882a593Smuzhiyun .procname = "rx_window_size",
96*4882a593Smuzhiyun .data = &rxrpc_rx_window_size,
97*4882a593Smuzhiyun .maxlen = sizeof(unsigned int),
98*4882a593Smuzhiyun .mode = 0644,
99*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
100*4882a593Smuzhiyun .extra1 = (void *)SYSCTL_ONE,
101*4882a593Smuzhiyun .extra2 = (void *)&n_max_acks,
102*4882a593Smuzhiyun },
103*4882a593Smuzhiyun {
104*4882a593Smuzhiyun .procname = "rx_mtu",
105*4882a593Smuzhiyun .data = &rxrpc_rx_mtu,
106*4882a593Smuzhiyun .maxlen = sizeof(unsigned int),
107*4882a593Smuzhiyun .mode = 0644,
108*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
109*4882a593Smuzhiyun .extra1 = (void *)SYSCTL_ONE,
110*4882a593Smuzhiyun .extra2 = (void *)&n_65535,
111*4882a593Smuzhiyun },
112*4882a593Smuzhiyun {
113*4882a593Smuzhiyun .procname = "rx_jumbo_max",
114*4882a593Smuzhiyun .data = &rxrpc_rx_jumbo_max,
115*4882a593Smuzhiyun .maxlen = sizeof(unsigned int),
116*4882a593Smuzhiyun .mode = 0644,
117*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
118*4882a593Smuzhiyun .extra1 = (void *)SYSCTL_ONE,
119*4882a593Smuzhiyun .extra2 = (void *)&four,
120*4882a593Smuzhiyun },
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun { }
123*4882a593Smuzhiyun };
124*4882a593Smuzhiyun
rxrpc_sysctl_init(void)125*4882a593Smuzhiyun int __init rxrpc_sysctl_init(void)
126*4882a593Smuzhiyun {
127*4882a593Smuzhiyun rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
128*4882a593Smuzhiyun rxrpc_sysctl_table);
129*4882a593Smuzhiyun if (!rxrpc_sysctl_reg_table)
130*4882a593Smuzhiyun return -ENOMEM;
131*4882a593Smuzhiyun return 0;
132*4882a593Smuzhiyun }
133*4882a593Smuzhiyun
rxrpc_sysctl_exit(void)134*4882a593Smuzhiyun void rxrpc_sysctl_exit(void)
135*4882a593Smuzhiyun {
136*4882a593Smuzhiyun if (rxrpc_sysctl_reg_table)
137*4882a593Smuzhiyun unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
138*4882a593Smuzhiyun }
139