1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * net/dccp/sysctl.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * An implementation of the DCCP protocol
6*4882a593Smuzhiyun * Arnaldo Carvalho de Melo <acme@mandriva.com>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/mm.h>
10*4882a593Smuzhiyun #include <linux/sysctl.h>
11*4882a593Smuzhiyun #include "dccp.h"
12*4882a593Smuzhiyun #include "feat.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #ifndef CONFIG_SYSCTL
15*4882a593Smuzhiyun #error This file should not be compiled without CONFIG_SYSCTL defined
16*4882a593Smuzhiyun #endif
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun /* Boundary values */
19*4882a593Smuzhiyun static int u8_max = 0xFF;
20*4882a593Smuzhiyun static unsigned long seqw_min = DCCPF_SEQ_WMIN,
21*4882a593Smuzhiyun seqw_max = 0xFFFFFFFF; /* maximum on 32 bit */
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static struct ctl_table dccp_default_table[] = {
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun .procname = "seq_window",
26*4882a593Smuzhiyun .data = &sysctl_dccp_sequence_window,
27*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_sequence_window),
28*4882a593Smuzhiyun .mode = 0644,
29*4882a593Smuzhiyun .proc_handler = proc_doulongvec_minmax,
30*4882a593Smuzhiyun .extra1 = &seqw_min, /* RFC 4340, 7.5.2 */
31*4882a593Smuzhiyun .extra2 = &seqw_max,
32*4882a593Smuzhiyun },
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun .procname = "rx_ccid",
35*4882a593Smuzhiyun .data = &sysctl_dccp_rx_ccid,
36*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_rx_ccid),
37*4882a593Smuzhiyun .mode = 0644,
38*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
39*4882a593Smuzhiyun .extra1 = SYSCTL_ZERO,
40*4882a593Smuzhiyun .extra2 = &u8_max, /* RFC 4340, 10. */
41*4882a593Smuzhiyun },
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun .procname = "tx_ccid",
44*4882a593Smuzhiyun .data = &sysctl_dccp_tx_ccid,
45*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_tx_ccid),
46*4882a593Smuzhiyun .mode = 0644,
47*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
48*4882a593Smuzhiyun .extra1 = SYSCTL_ZERO,
49*4882a593Smuzhiyun .extra2 = &u8_max, /* RFC 4340, 10. */
50*4882a593Smuzhiyun },
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun .procname = "request_retries",
53*4882a593Smuzhiyun .data = &sysctl_dccp_request_retries,
54*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_request_retries),
55*4882a593Smuzhiyun .mode = 0644,
56*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
57*4882a593Smuzhiyun .extra1 = SYSCTL_ONE,
58*4882a593Smuzhiyun .extra2 = &u8_max,
59*4882a593Smuzhiyun },
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun .procname = "retries1",
62*4882a593Smuzhiyun .data = &sysctl_dccp_retries1,
63*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_retries1),
64*4882a593Smuzhiyun .mode = 0644,
65*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
66*4882a593Smuzhiyun .extra1 = SYSCTL_ZERO,
67*4882a593Smuzhiyun .extra2 = &u8_max,
68*4882a593Smuzhiyun },
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun .procname = "retries2",
71*4882a593Smuzhiyun .data = &sysctl_dccp_retries2,
72*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_retries2),
73*4882a593Smuzhiyun .mode = 0644,
74*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
75*4882a593Smuzhiyun .extra1 = SYSCTL_ZERO,
76*4882a593Smuzhiyun .extra2 = &u8_max,
77*4882a593Smuzhiyun },
78*4882a593Smuzhiyun {
79*4882a593Smuzhiyun .procname = "tx_qlen",
80*4882a593Smuzhiyun .data = &sysctl_dccp_tx_qlen,
81*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_tx_qlen),
82*4882a593Smuzhiyun .mode = 0644,
83*4882a593Smuzhiyun .proc_handler = proc_dointvec_minmax,
84*4882a593Smuzhiyun .extra1 = SYSCTL_ZERO,
85*4882a593Smuzhiyun },
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun .procname = "sync_ratelimit",
88*4882a593Smuzhiyun .data = &sysctl_dccp_sync_ratelimit,
89*4882a593Smuzhiyun .maxlen = sizeof(sysctl_dccp_sync_ratelimit),
90*4882a593Smuzhiyun .mode = 0644,
91*4882a593Smuzhiyun .proc_handler = proc_dointvec_ms_jiffies,
92*4882a593Smuzhiyun },
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun { }
95*4882a593Smuzhiyun };
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun static struct ctl_table_header *dccp_table_header;
98*4882a593Smuzhiyun
dccp_sysctl_init(void)99*4882a593Smuzhiyun int __init dccp_sysctl_init(void)
100*4882a593Smuzhiyun {
101*4882a593Smuzhiyun dccp_table_header = register_net_sysctl(&init_net, "net/dccp/default",
102*4882a593Smuzhiyun dccp_default_table);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun return dccp_table_header != NULL ? 0 : -ENOMEM;
105*4882a593Smuzhiyun }
106*4882a593Smuzhiyun
dccp_sysctl_exit(void)107*4882a593Smuzhiyun void dccp_sysctl_exit(void)
108*4882a593Smuzhiyun {
109*4882a593Smuzhiyun if (dccp_table_header != NULL) {
110*4882a593Smuzhiyun unregister_net_sysctl_table(dccp_table_header);
111*4882a593Smuzhiyun dccp_table_header = NULL;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun }
114