atalk_proc.c revision 6ab3d5624e172c553004ecc862bfeac16d9d68b7 
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/sock.h>
15#include <linux/atalk.h>
16
17
18static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
19{
20	struct atalk_iface *i;
21
22	for (i = atalk_interfaces; pos && i; i = i->next)
23		--pos;
24
25	return i;
26}
27
28static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
29{
30	loff_t l = *pos;
31
32	read_lock_bh(&atalk_interfaces_lock);
33	return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
34}
35
36static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
37{
38	struct atalk_iface *i;
39
40	++*pos;
41	if (v == SEQ_START_TOKEN) {
42		i = NULL;
43		if (atalk_interfaces)
44			i = atalk_interfaces;
45		goto out;
46	}
47	i = v;
48	i = i->next;
49out:
50	return i;
51}
52
53static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
54{
55	read_unlock_bh(&atalk_interfaces_lock);
56}
57
58static int atalk_seq_interface_show(struct seq_file *seq, void *v)
59{
60	struct atalk_iface *iface;
61
62	if (v == SEQ_START_TOKEN) {
63		seq_puts(seq, "Interface        Address   Networks  "
64			      "Status\n");
65		goto out;
66	}
67
68	iface = v;
69	seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
70		   iface->dev->name, ntohs(iface->address.s_net),
71		   iface->address.s_node, ntohs(iface->nets.nr_firstnet),
72		   ntohs(iface->nets.nr_lastnet), iface->status);
73out:
74	return 0;
75}
76
77static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
78{
79	struct atalk_route *r;
80
81	for (r = atalk_routes; pos && r; r = r->next)
82		--pos;
83
84	return r;
85}
86
87static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
88{
89	loff_t l = *pos;
90
91	read_lock_bh(&atalk_routes_lock);
92	return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
93}
94
95static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
96{
97	struct atalk_route *r;
98
99	++*pos;
100	if (v == SEQ_START_TOKEN) {
101		r = NULL;
102		if (atalk_routes)
103			r = atalk_routes;
104		goto out;
105	}
106	r = v;
107	r = r->next;
108out:
109	return r;
110}
111
112static void atalk_seq_route_stop(struct seq_file *seq, void *v)
113{
114	read_unlock_bh(&atalk_routes_lock);
115}
116
117static int atalk_seq_route_show(struct seq_file *seq, void *v)
118{
119	struct atalk_route *rt;
120
121	if (v == SEQ_START_TOKEN) {
122		seq_puts(seq, "Target        Router  Flags Dev\n");
123		goto out;
124	}
125
126	if (atrtr_default.dev) {
127		rt = &atrtr_default;
128		seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
129			       ntohs(rt->gateway.s_net), rt->gateway.s_node,
130			       rt->flags, rt->dev->name);
131	}
132
133	rt = v;
134	seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
135		   ntohs(rt->target.s_net), rt->target.s_node,
136		   ntohs(rt->gateway.s_net), rt->gateway.s_node,
137		   rt->flags, rt->dev->name);
138out:
139	return 0;
140}
141
142static __inline__ struct sock *atalk_get_socket_idx(loff_t pos)
143{
144	struct sock *s;
145	struct hlist_node *node;
146
147	sk_for_each(s, node, &atalk_sockets)
148		if (!pos--)
149			goto found;
150	s = NULL;
151found:
152	return s;
153}
154
155static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
156{
157	loff_t l = *pos;
158
159	read_lock_bh(&atalk_sockets_lock);
160	return l ? atalk_get_socket_idx(--l) : SEQ_START_TOKEN;
161}
162
163static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
164{
165	struct sock *i;
166
167	++*pos;
168	if (v == SEQ_START_TOKEN) {
169		i = sk_head(&atalk_sockets);
170		goto out;
171	}
172	i = sk_next(v);
173out:
174	return i;
175}
176
177static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
178{
179	read_unlock_bh(&atalk_sockets_lock);
180}
181
182static int atalk_seq_socket_show(struct seq_file *seq, void *v)
183{
184	struct sock *s;
185	struct atalk_sock *at;
186
187	if (v == SEQ_START_TOKEN) {
188		seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
189				"Rx_queue St UID\n");
190		goto out;
191	}
192
193	s = v;
194	at = at_sk(s);
195
196	seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
197			"%02X %d\n",
198		   s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
199		   ntohs(at->dest_net), at->dest_node, at->dest_port,
200		   atomic_read(&s->sk_wmem_alloc),
201		   atomic_read(&s->sk_rmem_alloc),
202		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
203out:
204	return 0;
205}
206
207static struct seq_operations atalk_seq_interface_ops = {
208	.start  = atalk_seq_interface_start,
209	.next   = atalk_seq_interface_next,
210	.stop   = atalk_seq_interface_stop,
211	.show   = atalk_seq_interface_show,
212};
213
214static struct seq_operations atalk_seq_route_ops = {
215	.start  = atalk_seq_route_start,
216	.next   = atalk_seq_route_next,
217	.stop   = atalk_seq_route_stop,
218	.show   = atalk_seq_route_show,
219};
220
221static struct seq_operations atalk_seq_socket_ops = {
222	.start  = atalk_seq_socket_start,
223	.next   = atalk_seq_socket_next,
224	.stop   = atalk_seq_socket_stop,
225	.show   = atalk_seq_socket_show,
226};
227
228static int atalk_seq_interface_open(struct inode *inode, struct file *file)
229{
230	return seq_open(file, &atalk_seq_interface_ops);
231}
232
233static int atalk_seq_route_open(struct inode *inode, struct file *file)
234{
235	return seq_open(file, &atalk_seq_route_ops);
236}
237
238static int atalk_seq_socket_open(struct inode *inode, struct file *file)
239{
240	return seq_open(file, &atalk_seq_socket_ops);
241}
242
243static struct file_operations atalk_seq_interface_fops = {
244	.owner		= THIS_MODULE,
245	.open		= atalk_seq_interface_open,
246	.read		= seq_read,
247	.llseek		= seq_lseek,
248	.release	= seq_release,
249};
250
251static struct file_operations atalk_seq_route_fops = {
252	.owner		= THIS_MODULE,
253	.open		= atalk_seq_route_open,
254	.read		= seq_read,
255	.llseek		= seq_lseek,
256	.release	= seq_release,
257};
258
259static struct file_operations atalk_seq_socket_fops = {
260	.owner		= THIS_MODULE,
261	.open		= atalk_seq_socket_open,
262	.read		= seq_read,
263	.llseek		= seq_lseek,
264	.release	= seq_release,
265};
266
267static struct proc_dir_entry *atalk_proc_dir;
268
269int __init atalk_proc_init(void)
270{
271	struct proc_dir_entry *p;
272	int rc = -ENOMEM;
273
274	atalk_proc_dir = proc_mkdir("atalk", proc_net);
275	if (!atalk_proc_dir)
276		goto out;
277	atalk_proc_dir->owner = THIS_MODULE;
278
279	p = create_proc_entry("interface", S_IRUGO, atalk_proc_dir);
280	if (!p)
281		goto out_interface;
282	p->proc_fops = &atalk_seq_interface_fops;
283
284	p = create_proc_entry("route", S_IRUGO, atalk_proc_dir);
285	if (!p)
286		goto out_route;
287	p->proc_fops = &atalk_seq_route_fops;
288
289	p = create_proc_entry("socket", S_IRUGO, atalk_proc_dir);
290	if (!p)
291		goto out_socket;
292	p->proc_fops = &atalk_seq_socket_fops;
293
294	p = create_proc_entry("arp", S_IRUGO, atalk_proc_dir);
295	if (!p)
296		goto out_arp;
297	p->proc_fops = &atalk_seq_arp_fops;
298
299	rc = 0;
300out:
301	return rc;
302out_arp:
303	remove_proc_entry("socket", atalk_proc_dir);
304out_socket:
305	remove_proc_entry("route", atalk_proc_dir);
306out_route:
307	remove_proc_entry("interface", atalk_proc_dir);
308out_interface:
309	remove_proc_entry("atalk", proc_net);
310	goto out;
311}
312
313void __exit atalk_proc_exit(void)
314{
315	remove_proc_entry("interface", atalk_proc_dir);
316	remove_proc_entry("route", atalk_proc_dir);
317	remove_proc_entry("socket", atalk_proc_dir);
318	remove_proc_entry("arp", atalk_proc_dir);
319	remove_proc_entry("atalk", proc_net);
320}
321