atalk_proc.c revision 0ffbf8bf21db0186e9fbb024a1796c3148790578 
1/*
2 * 	atalk_proc.c - proc support for Appletalk
3 *
4 * 	Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br>
5 *
6 *	This program is free software; you can redistribute it and/or modify it
7 *	under the terms of the GNU General Public License as published by the
8 *	Free Software Foundation, version 2.
9 */
10
11#include <linux/init.h>
12#include <linux/proc_fs.h>
13#include <linux/seq_file.h>
14#include <net/net_namespace.h>
15#include <net/sock.h>
16#include <linux/atalk.h>
17
18
19static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
20{
21	struct atalk_iface *i;
22
23	for (i = atalk_interfaces; pos && i; i = i->next)
24		--pos;
25
26	return i;
27}
28
29static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
30	__acquires(atalk_interfaces_lock)
31{
32	loff_t l = *pos;
33
34	read_lock_bh(&atalk_interfaces_lock);
35	return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
36}
37
38static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
39{
40	struct atalk_iface *i;
41
42	++*pos;
43	if (v == SEQ_START_TOKEN) {
44		i = NULL;
45		if (atalk_interfaces)
46			i = atalk_interfaces;
47		goto out;
48	}
49	i = v;
50	i = i->next;
51out:
52	return i;
53}
54
55static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
56	__releases(atalk_interfaces_lock)
57{
58	read_unlock_bh(&atalk_interfaces_lock);
59}
60
61static int atalk_seq_interface_show(struct seq_file *seq, void *v)
62{
63	struct atalk_iface *iface;
64
65	if (v == SEQ_START_TOKEN) {
66		seq_puts(seq, "Interface        Address   Networks  "
67			      "Status\n");
68		goto out;
69	}
70
71	iface = v;
72	seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
73		   iface->dev->name, ntohs(iface->address.s_net),
74		   iface->address.s_node, ntohs(iface->nets.nr_firstnet),
75		   ntohs(iface->nets.nr_lastnet), iface->status);
76out:
77	return 0;
78}
79
80static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
81{
82	struct atalk_route *r;
83
84	for (r = atalk_routes; pos && r; r = r->next)
85		--pos;
86
87	return r;
88}
89
90static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
91	__acquires(atalk_routes_lock)
92{
93	loff_t l = *pos;
94
95	read_lock_bh(&atalk_routes_lock);
96	return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
97}
98
99static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
100{
101	struct atalk_route *r;
102
103	++*pos;
104	if (v == SEQ_START_TOKEN) {
105		r = NULL;
106		if (atalk_routes)
107			r = atalk_routes;
108		goto out;
109	}
110	r = v;
111	r = r->next;
112out:
113	return r;
114}
115
116static void atalk_seq_route_stop(struct seq_file *seq, void *v)
117	__releases(atalk_routes_lock)
118{
119	read_unlock_bh(&atalk_routes_lock);
120}
121
122static int atalk_seq_route_show(struct seq_file *seq, void *v)
123{
124	struct atalk_route *rt;
125
126	if (v == SEQ_START_TOKEN) {
127		seq_puts(seq, "Target        Router  Flags Dev\n");
128		goto out;
129	}
130
131	if (atrtr_default.dev) {
132		rt = &atrtr_default;
133		seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
134			       ntohs(rt->gateway.s_net), rt->gateway.s_node,
135			       rt->flags, rt->dev->name);
136	}
137
138	rt = v;
139	seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
140		   ntohs(rt->target.s_net), rt->target.s_node,
141		   ntohs(rt->gateway.s_net), rt->gateway.s_node,
142		   rt->flags, rt->dev->name);
143out:
144	return 0;
145}
146
147static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
148	__acquires(atalk_sockets_lock)
149{
150	read_lock_bh(&atalk_sockets_lock);
151	return seq_hlist_start_head(&atalk_sockets, *pos);
152}
153
154static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
155{
156	return seq_hlist_next(v, &atalk_sockets, pos);
157}
158
159static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
160	__releases(atalk_sockets_lock)
161{
162	read_unlock_bh(&atalk_sockets_lock);
163}
164
165static int atalk_seq_socket_show(struct seq_file *seq, void *v)
166{
167	struct sock *s;
168	struct atalk_sock *at;
169
170	if (v == SEQ_START_TOKEN) {
171		seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
172				"Rx_queue St UID\n");
173		goto out;
174	}
175
176	s = sk_entry(v);
177	at = at_sk(s);
178
179	seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
180			"%02X %d\n",
181		   s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
182		   ntohs(at->dest_net), at->dest_node, at->dest_port,
183		   sk_wmem_alloc_get(s),
184		   sk_rmem_alloc_get(s),
185		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
186out:
187	return 0;
188}
189
190static const struct seq_operations atalk_seq_interface_ops = {
191	.start  = atalk_seq_interface_start,
192	.next   = atalk_seq_interface_next,
193	.stop   = atalk_seq_interface_stop,
194	.show   = atalk_seq_interface_show,
195};
196
197static const struct seq_operations atalk_seq_route_ops = {
198	.start  = atalk_seq_route_start,
199	.next   = atalk_seq_route_next,
200	.stop   = atalk_seq_route_stop,
201	.show   = atalk_seq_route_show,
202};
203
204static const struct seq_operations atalk_seq_socket_ops = {
205	.start  = atalk_seq_socket_start,
206	.next   = atalk_seq_socket_next,
207	.stop   = atalk_seq_socket_stop,
208	.show   = atalk_seq_socket_show,
209};
210
211static int atalk_seq_interface_open(struct inode *inode, struct file *file)
212{
213	return seq_open(file, &atalk_seq_interface_ops);
214}
215
216static int atalk_seq_route_open(struct inode *inode, struct file *file)
217{
218	return seq_open(file, &atalk_seq_route_ops);
219}
220
221static int atalk_seq_socket_open(struct inode *inode, struct file *file)
222{
223	return seq_open(file, &atalk_seq_socket_ops);
224}
225
226static const struct file_operations atalk_seq_interface_fops = {
227	.owner		= THIS_MODULE,
228	.open		= atalk_seq_interface_open,
229	.read		= seq_read,
230	.llseek		= seq_lseek,
231	.release	= seq_release,
232};
233
234static const struct file_operations atalk_seq_route_fops = {
235	.owner		= THIS_MODULE,
236	.open		= atalk_seq_route_open,
237	.read		= seq_read,
238	.llseek		= seq_lseek,
239	.release	= seq_release,
240};
241
242static const struct file_operations atalk_seq_socket_fops = {
243	.owner		= THIS_MODULE,
244	.open		= atalk_seq_socket_open,
245	.read		= seq_read,
246	.llseek		= seq_lseek,
247	.release	= seq_release,
248};
249
250static struct proc_dir_entry *atalk_proc_dir;
251
252int __init atalk_proc_init(void)
253{
254	struct proc_dir_entry *p;
255	int rc = -ENOMEM;
256
257	atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
258	if (!atalk_proc_dir)
259		goto out;
260
261	p = proc_create("interface", S_IRUGO, atalk_proc_dir,
262			&atalk_seq_interface_fops);
263	if (!p)
264		goto out_interface;
265
266	p = proc_create("route", S_IRUGO, atalk_proc_dir,
267			&atalk_seq_route_fops);
268	if (!p)
269		goto out_route;
270
271	p = proc_create("socket", S_IRUGO, atalk_proc_dir,
272			&atalk_seq_socket_fops);
273	if (!p)
274		goto out_socket;
275
276	p = proc_create("arp", S_IRUGO, atalk_proc_dir, &atalk_seq_arp_fops);
277	if (!p)
278		goto out_arp;
279
280	rc = 0;
281out:
282	return rc;
283out_arp:
284	remove_proc_entry("socket", atalk_proc_dir);
285out_socket:
286	remove_proc_entry("route", atalk_proc_dir);
287out_route:
288	remove_proc_entry("interface", atalk_proc_dir);
289out_interface:
290	remove_proc_entry("atalk", init_net.proc_net);
291	goto out;
292}
293
294void __exit atalk_proc_exit(void)
295{
296	remove_proc_entry("interface", atalk_proc_dir);
297	remove_proc_entry("route", atalk_proc_dir);
298	remove_proc_entry("socket", atalk_proc_dir);
299	remove_proc_entry("arp", atalk_proc_dir);
300	remove_proc_entry("atalk", init_net.proc_net);
301}
302