1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
8 */
9#include <linux/mm.h>
10#include <linux/slab.h>
11#include <linux/sysctl.h>
12#include <linux/spinlock.h>
13#include <net/ax25.h>
14
15static int min_ipdefmode[1],    	max_ipdefmode[] = {1};
16static int min_axdefmode[1],            max_axdefmode[] = {1};
17static int min_backoff[1],		max_backoff[] = {2};
18static int min_conmode[1],		max_conmode[] = {2};
19static int min_window[] = {1},		max_window[] = {7};
20static int min_ewindow[] = {1},		max_ewindow[] = {63};
21static int min_t1[] = {1},		max_t1[] = {30000};
22static int min_t2[] = {1},		max_t2[] = {20000};
23static int min_t3[1],			max_t3[] = {3600000};
24static int min_idle[1],			max_idle[] = {65535000};
25static int min_n2[] = {1},		max_n2[] = {31};
26static int min_paclen[] = {1},		max_paclen[] = {512};
27static int min_proto[1],		max_proto[] = { AX25_PROTO_MAX };
28#ifdef CONFIG_AX25_DAMA_SLAVE
29static int min_ds_timeout[1],		max_ds_timeout[] = {65535000};
30#endif
31
32static const struct ctl_table ax25_param_table[] = {
33	{
34		.procname	= "ip_default_mode",
35		.maxlen		= sizeof(int),
36		.mode		= 0644,
37		.proc_handler	= proc_dointvec_minmax,
38		.extra1		= &min_ipdefmode,
39		.extra2		= &max_ipdefmode
40	},
41	{
42		.procname	= "ax25_default_mode",
43		.maxlen		= sizeof(int),
44		.mode		= 0644,
45		.proc_handler	= proc_dointvec_minmax,
46		.extra1		= &min_axdefmode,
47		.extra2		= &max_axdefmode
48	},
49	{
50		.procname	= "backoff_type",
51		.maxlen		= sizeof(int),
52		.mode		= 0644,
53		.proc_handler	= proc_dointvec_minmax,
54		.extra1		= &min_backoff,
55		.extra2		= &max_backoff
56	},
57	{
58		.procname	= "connect_mode",
59		.maxlen		= sizeof(int),
60		.mode		= 0644,
61		.proc_handler	= proc_dointvec_minmax,
62		.extra1		= &min_conmode,
63		.extra2		= &max_conmode
64	},
65	{
66		.procname	= "standard_window_size",
67		.maxlen		= sizeof(int),
68		.mode		= 0644,
69		.proc_handler	= proc_dointvec_minmax,
70		.extra1		= &min_window,
71		.extra2		= &max_window
72	},
73	{
74		.procname	= "extended_window_size",
75		.maxlen		= sizeof(int),
76		.mode		= 0644,
77		.proc_handler	= proc_dointvec_minmax,
78		.extra1		= &min_ewindow,
79		.extra2		= &max_ewindow
80	},
81	{
82		.procname	= "t1_timeout",
83		.maxlen		= sizeof(int),
84		.mode		= 0644,
85		.proc_handler	= proc_dointvec_minmax,
86		.extra1		= &min_t1,
87		.extra2		= &max_t1
88	},
89	{
90		.procname	= "t2_timeout",
91		.maxlen		= sizeof(int),
92		.mode		= 0644,
93		.proc_handler	= proc_dointvec_minmax,
94		.extra1		= &min_t2,
95		.extra2		= &max_t2
96	},
97	{
98		.procname	= "t3_timeout",
99		.maxlen		= sizeof(int),
100		.mode		= 0644,
101		.proc_handler	= proc_dointvec_minmax,
102		.extra1		= &min_t3,
103		.extra2		= &max_t3
104	},
105	{
106		.procname	= "idle_timeout",
107		.maxlen		= sizeof(int),
108		.mode		= 0644,
109		.proc_handler	= proc_dointvec_minmax,
110		.extra1		= &min_idle,
111		.extra2		= &max_idle
112	},
113	{
114		.procname	= "maximum_retry_count",
115		.maxlen		= sizeof(int),
116		.mode		= 0644,
117		.proc_handler	= proc_dointvec_minmax,
118		.extra1		= &min_n2,
119		.extra2		= &max_n2
120	},
121	{
122		.procname	= "maximum_packet_length",
123		.maxlen		= sizeof(int),
124		.mode		= 0644,
125		.proc_handler	= proc_dointvec_minmax,
126		.extra1		= &min_paclen,
127		.extra2		= &max_paclen
128	},
129	{
130		.procname	= "protocol",
131		.maxlen		= sizeof(int),
132		.mode		= 0644,
133		.proc_handler	= proc_dointvec_minmax,
134		.extra1		= &min_proto,
135		.extra2		= &max_proto
136	},
137#ifdef CONFIG_AX25_DAMA_SLAVE
138	{
139		.procname	= "dama_slave_timeout",
140		.maxlen		= sizeof(int),
141		.mode		= 0644,
142		.proc_handler	= proc_dointvec_minmax,
143		.extra1		= &min_ds_timeout,
144		.extra2		= &max_ds_timeout
145	},
146#endif
147
148	{ }	/* that's all, folks! */
149};
150
151int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
152{
153	char path[sizeof("net/ax25/") + IFNAMSIZ];
154	int k;
155	struct ctl_table *table;
156
157	table = kmemdup(ax25_param_table, sizeof(ax25_param_table), GFP_KERNEL);
158	if (!table)
159		return -ENOMEM;
160
161	for (k = 0; k < AX25_MAX_VALUES; k++)
162		table[k].data = &ax25_dev->values[k];
163
164	snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name);
165	ax25_dev->sysheader = register_net_sysctl(&init_net, path, table);
166	if (!ax25_dev->sysheader) {
167		kfree(table);
168		return -ENOMEM;
169	}
170	return 0;
171}
172
173void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
174{
175	struct ctl_table_header *header = ax25_dev->sysheader;
176	struct ctl_table *table;
177
178	if (header) {
179		ax25_dev->sysheader = NULL;
180		table = header->ctl_table_arg;
181		unregister_net_sysctl_table(header);
182		kfree(table);
183	}
184}
185