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_ms = 1; |
19 | static const unsigned long max_ms = 1000; |
20 | static const unsigned long one_jiffy = 1; |
21 | static const unsigned long max_jiffies = MAX_JIFFY_OFFSET; |
22 | #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY |
23 | static const unsigned long max_500 = 500; |
24 | #endif |
25 | |
26 | /* |
27 | * RxRPC operating parameters. |
28 | * |
29 | * See Documentation/networking/rxrpc.rst and the variable definitions for more |
30 | * information on the individual parameters. |
31 | */ |
32 | static struct ctl_table rxrpc_sysctl_table[] = { |
33 | /* Values measured in milliseconds */ |
34 | { |
35 | .procname = "soft_ack_delay" , |
36 | .data = &rxrpc_soft_ack_delay, |
37 | .maxlen = sizeof(unsigned long), |
38 | .mode = 0644, |
39 | .proc_handler = proc_doulongvec_minmax, |
40 | .extra1 = (void *)&one_ms, |
41 | .extra2 = (void *)&max_ms, |
42 | }, |
43 | { |
44 | .procname = "idle_ack_delay" , |
45 | .data = &rxrpc_idle_ack_delay, |
46 | .maxlen = sizeof(unsigned long), |
47 | .mode = 0644, |
48 | .proc_handler = proc_doulongvec_minmax, |
49 | .extra1 = (void *)&one_ms, |
50 | .extra2 = (void *)&max_ms, |
51 | }, |
52 | { |
53 | .procname = "idle_conn_expiry" , |
54 | .data = &rxrpc_conn_idle_client_expiry, |
55 | .maxlen = sizeof(unsigned long), |
56 | .mode = 0644, |
57 | .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
58 | .extra1 = (void *)&one_jiffy, |
59 | .extra2 = (void *)&max_jiffies, |
60 | }, |
61 | { |
62 | .procname = "idle_conn_fast_expiry" , |
63 | .data = &rxrpc_conn_idle_client_fast_expiry, |
64 | .maxlen = sizeof(unsigned long), |
65 | .mode = 0644, |
66 | .proc_handler = proc_doulongvec_ms_jiffies_minmax, |
67 | .extra1 = (void *)&one_jiffy, |
68 | .extra2 = (void *)&max_jiffies, |
69 | }, |
70 | |
71 | /* Values used in milliseconds */ |
72 | #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY |
73 | { |
74 | .procname = "inject_rx_delay" , |
75 | .data = &rxrpc_inject_rx_delay, |
76 | .maxlen = sizeof(unsigned long), |
77 | .mode = 0644, |
78 | .proc_handler = proc_doulongvec_minmax, |
79 | .extra1 = (void *)SYSCTL_LONG_ZERO, |
80 | .extra2 = (void *)&max_500, |
81 | }, |
82 | #endif |
83 | |
84 | /* Non-time values */ |
85 | { |
86 | .procname = "reap_client_conns" , |
87 | .data = &rxrpc_reap_client_connections, |
88 | .maxlen = sizeof(unsigned int), |
89 | .mode = 0644, |
90 | .proc_handler = proc_dointvec_minmax, |
91 | .extra1 = (void *)SYSCTL_ONE, |
92 | .extra2 = (void *)&n_65535, |
93 | }, |
94 | { |
95 | .procname = "max_backlog" , |
96 | .data = &rxrpc_max_backlog, |
97 | .maxlen = sizeof(unsigned int), |
98 | .mode = 0644, |
99 | .proc_handler = proc_dointvec_minmax, |
100 | .extra1 = (void *)&four, |
101 | .extra2 = (void *)&max_backlog, |
102 | }, |
103 | { |
104 | .procname = "rx_window_size" , |
105 | .data = &rxrpc_rx_window_size, |
106 | .maxlen = sizeof(unsigned int), |
107 | .mode = 0644, |
108 | .proc_handler = proc_dointvec_minmax, |
109 | .extra1 = (void *)SYSCTL_ONE, |
110 | .extra2 = (void *)&n_max_acks, |
111 | }, |
112 | { |
113 | .procname = "rx_mtu" , |
114 | .data = &rxrpc_rx_mtu, |
115 | .maxlen = sizeof(unsigned int), |
116 | .mode = 0644, |
117 | .proc_handler = proc_dointvec_minmax, |
118 | .extra1 = (void *)SYSCTL_ONE, |
119 | .extra2 = (void *)&n_65535, |
120 | }, |
121 | { |
122 | .procname = "rx_jumbo_max" , |
123 | .data = &rxrpc_rx_jumbo_max, |
124 | .maxlen = sizeof(unsigned int), |
125 | .mode = 0644, |
126 | .proc_handler = proc_dointvec_minmax, |
127 | .extra1 = (void *)SYSCTL_ONE, |
128 | .extra2 = (void *)&four, |
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(header: rxrpc_sysctl_reg_table); |
146 | } |
147 | |