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 max_backlog = RXRPC_BACKLOG_MAX - 1; |
16 | static const unsigned int n_65535 = 65535; |
17 | static const unsigned int n_max_acks = 255; |
18 | static const unsigned long one_jiffy = 1; |
19 | static const unsigned long max_jiffies = MAX_JIFFY_OFFSET; |
20 | #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY |
21 | static const unsigned long max_500 = 500; |
22 | #endif |
23 | |
24 | /* |
25 | * RxRPC operating parameters. |
26 | * |
27 | * See Documentation/networking/rxrpc.rst and the variable definitions for more |
28 | * information on the individual parameters. |
29 | */ |
30 | static struct ctl_table rxrpc_sysctl_table[] = { |
31 | /* Values measured in milliseconds but used in jiffies */ |
32 | { |
33 | .procname = "soft_ack_delay" , |
34 | .data = &rxrpc_soft_ack_delay, |
35 | .maxlen = sizeof(unsigned long), |
36 | .mode = 0644, |
37 | .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
38 | .extra1 = (void *)&one_jiffy, |
39 | .extra2 = (void *)&max_jiffies, |
40 | }, |
41 | { |
42 | .procname = "idle_ack_delay" , |
43 | .data = &rxrpc_idle_ack_delay, |
44 | .maxlen = sizeof(unsigned long), |
45 | .mode = 0644, |
46 | .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
47 | .extra1 = (void *)&one_jiffy, |
48 | .extra2 = (void *)&max_jiffies, |
49 | }, |
50 | { |
51 | .procname = "idle_conn_expiry" , |
52 | .data = &rxrpc_conn_idle_client_expiry, |
53 | .maxlen = sizeof(unsigned long), |
54 | .mode = 0644, |
55 | .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
56 | .extra1 = (void *)&one_jiffy, |
57 | .extra2 = (void *)&max_jiffies, |
58 | }, |
59 | { |
60 | .procname = "idle_conn_fast_expiry" , |
61 | .data = &rxrpc_conn_idle_client_fast_expiry, |
62 | .maxlen = sizeof(unsigned long), |
63 | .mode = 0644, |
64 | .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
65 | .extra1 = (void *)&one_jiffy, |
66 | .extra2 = (void *)&max_jiffies, |
67 | }, |
68 | |
69 | /* Values used in milliseconds */ |
70 | #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY |
71 | { |
72 | .procname = "inject_rx_delay" , |
73 | .data = &rxrpc_inject_rx_delay, |
74 | .maxlen = sizeof(unsigned long), |
75 | .mode = 0644, |
76 | .proc_handler = proc_doulongvec_minmax, |
77 | .extra1 = (void *)SYSCTL_LONG_ZERO, |
78 | .extra2 = (void *)&max_500, |
79 | }, |
80 | #endif |
81 | |
82 | /* Non-time values */ |
83 | { |
84 | .procname = "reap_client_conns" , |
85 | .data = &rxrpc_reap_client_connections, |
86 | .maxlen = sizeof(unsigned int), |
87 | .mode = 0644, |
88 | .proc_handler = proc_dointvec_minmax, |
89 | .extra1 = (void *)SYSCTL_ONE, |
90 | .extra2 = (void *)&n_65535, |
91 | }, |
92 | { |
93 | .procname = "max_backlog" , |
94 | .data = &rxrpc_max_backlog, |
95 | .maxlen = sizeof(unsigned int), |
96 | .mode = 0644, |
97 | .proc_handler = proc_dointvec_minmax, |
98 | .extra1 = (void *)&four, |
99 | .extra2 = (void *)&max_backlog, |
100 | }, |
101 | { |
102 | .procname = "rx_window_size" , |
103 | .data = &rxrpc_rx_window_size, |
104 | .maxlen = sizeof(unsigned int), |
105 | .mode = 0644, |
106 | .proc_handler = proc_dointvec_minmax, |
107 | .extra1 = (void *)SYSCTL_ONE, |
108 | .extra2 = (void *)&n_max_acks, |
109 | }, |
110 | { |
111 | .procname = "rx_mtu" , |
112 | .data = &rxrpc_rx_mtu, |
113 | .maxlen = sizeof(unsigned int), |
114 | .mode = 0644, |
115 | .proc_handler = proc_dointvec_minmax, |
116 | .extra1 = (void *)SYSCTL_ONE, |
117 | .extra2 = (void *)&n_65535, |
118 | }, |
119 | { |
120 | .procname = "rx_jumbo_max" , |
121 | .data = &rxrpc_rx_jumbo_max, |
122 | .maxlen = sizeof(unsigned int), |
123 | .mode = 0644, |
124 | .proc_handler = proc_dointvec_minmax, |
125 | .extra1 = (void *)SYSCTL_ONE, |
126 | .extra2 = (void *)&four, |
127 | }, |
128 | { } |
129 | }; |
130 | |
131 | int __init rxrpc_sysctl_init(void) |
132 | { |
133 | rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc" , |
134 | rxrpc_sysctl_table); |
135 | if (!rxrpc_sysctl_reg_table) |
136 | return -ENOMEM; |
137 | return 0; |
138 | } |
139 | |
140 | void rxrpc_sysctl_exit(void) |
141 | { |
142 | if (rxrpc_sysctl_reg_table) |
143 | unregister_net_sysctl_table(header: rxrpc_sysctl_reg_table); |
144 | } |
145 | |