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