atalk_proc.c revision bc3b2d7fb9b014d75ebb79ba371a763dbab5e8cf 
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#include <linux/export.h>
18
19
20static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos)
21{
22	struct atalk_iface *i;
23
24	for (i = atalk_interfaces; pos && i; i = i->next)
25		--pos;
26
27	return i;
28}
29
30static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos)
31	__acquires(atalk_interfaces_lock)
32{
33	loff_t l = *pos;
34
35	read_lock_bh(&atalk_interfaces_lock);
36	return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN;
37}
38
39static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
40{
41	struct atalk_iface *i;
42
43	++*pos;
44	if (v == SEQ_START_TOKEN) {
45		i = NULL;
46		if (atalk_interfaces)
47			i = atalk_interfaces;
48		goto out;
49	}
50	i = v;
51	i = i->next;
52out:
53	return i;
54}
55
56static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
57	__releases(atalk_interfaces_lock)
58{
59	read_unlock_bh(&atalk_interfaces_lock);
60}
61
62static int atalk_seq_interface_show(struct seq_file *seq, void *v)
63{
64	struct atalk_iface *iface;
65
66	if (v == SEQ_START_TOKEN) {
67		seq_puts(seq, "Interface        Address   Networks  "
68			      "Status\n");
69		goto out;
70	}
71
72	iface = v;
73	seq_printf(seq, "%-16s %04X:%02X  %04X-%04X  %d\n",
74		   iface->dev->name, ntohs(iface->address.s_net),
75		   iface->address.s_node, ntohs(iface->nets.nr_firstnet),
76		   ntohs(iface->nets.nr_lastnet), iface->status);
77out:
78	return 0;
79}
80
81static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos)
82{
83	struct atalk_route *r;
84
85	for (r = atalk_routes; pos && r; r = r->next)
86		--pos;
87
88	return r;
89}
90
91static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos)
92	__acquires(atalk_routes_lock)
93{
94	loff_t l = *pos;
95
96	read_lock_bh(&atalk_routes_lock);
97	return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN;
98}
99
100static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
101{
102	struct atalk_route *r;
103
104	++*pos;
105	if (v == SEQ_START_TOKEN) {
106		r = NULL;
107		if (atalk_routes)
108			r = atalk_routes;
109		goto out;
110	}
111	r = v;
112	r = r->next;
113out:
114	return r;
115}
116
117static void atalk_seq_route_stop(struct seq_file *seq, void *v)
118	__releases(atalk_routes_lock)
119{
120	read_unlock_bh(&atalk_routes_lock);
121}
122
123static int atalk_seq_route_show(struct seq_file *seq, void *v)
124{
125	struct atalk_route *rt;
126
127	if (v == SEQ_START_TOKEN) {
128		seq_puts(seq, "Target        Router  Flags Dev\n");
129		goto out;
130	}
131
132	if (atrtr_default.dev) {
133		rt = &atrtr_default;
134		seq_printf(seq, "Default     %04X:%02X  %-4d  %s\n",
135			       ntohs(rt->gateway.s_net), rt->gateway.s_node,
136			       rt->flags, rt->dev->name);
137	}
138
139	rt = v;
140	seq_printf(seq, "%04X:%02X     %04X:%02X  %-4d  %s\n",
141		   ntohs(rt->target.s_net), rt->target.s_node,
142		   ntohs(rt->gateway.s_net), rt->gateway.s_node,
143		   rt->flags, rt->dev->name);
144out:
145	return 0;
146}
147
148static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos)
149	__acquires(atalk_sockets_lock)
150{
151	read_lock_bh(&atalk_sockets_lock);
152	return seq_hlist_start_head(&atalk_sockets, *pos);
153}
154
155static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
156{
157	return seq_hlist_next(v, &atalk_sockets, pos);
158}
159
160static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
161	__releases(atalk_sockets_lock)
162{
163	read_unlock_bh(&atalk_sockets_lock);
164}
165
166static int atalk_seq_socket_show(struct seq_file *seq, void *v)
167{
168	struct sock *s;
169	struct atalk_sock *at;
170
171	if (v == SEQ_START_TOKEN) {
172		seq_printf(seq, "Type Local_addr  Remote_addr Tx_queue "
173				"Rx_queue St UID\n");
174		goto out;
175	}
176
177	s = sk_entry(v);
178	at = at_sk(s);
179
180	seq_printf(seq, "%02X   %04X:%02X:%02X  %04X:%02X:%02X  %08X:%08X "
181			"%02X %d\n",
182		   s->sk_type, ntohs(at->src_net), at->src_node, at->src_port,
183		   ntohs(at->dest_net), at->dest_node, at->dest_port,
184		   sk_wmem_alloc_get(s),
185		   sk_rmem_alloc_get(s),
186		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
187out:
188	return 0;
189}
190
191static const struct seq_operations atalk_seq_interface_ops = {
192	.start  = atalk_seq_interface_start,
193	.next   = atalk_seq_interface_next,
194	.stop   = atalk_seq_interface_stop,
195	.show   = atalk_seq_interface_show,
196};
197
198static const struct seq_operations atalk_seq_route_ops = {
199	.start  = atalk_seq_route_start,
200	.next   = atalk_seq_route_next,
201	.stop   = atalk_seq_route_stop,
202	.show   = atalk_seq_route_show,
203};
204
205static const struct seq_operations atalk_seq_socket_ops = {
206	.start  = atalk_seq_socket_start,
207	.next   = atalk_seq_socket_next,
208	.stop   = atalk_seq_socket_stop,
209	.show   = atalk_seq_socket_show,
210};
211
212static int atalk_seq_interface_open(struct inode *inode, struct file *file)
213{
214	return seq_open(file, &atalk_seq_interface_ops);
215}
216
217static int atalk_seq_route_open(struct inode *inode, struct file *file)
218{
219	return seq_open(file, &atalk_seq_route_ops);
220}
221
222static int atalk_seq_socket_open(struct inode *inode, struct file *file)
223{
224	return seq_open(file, &atalk_seq_socket_ops);
225}
226
227static const struct file_operations atalk_seq_interface_fops = {
228	.owner		= THIS_MODULE,
229	.open		= atalk_seq_interface_open,
230	.read		= seq_read,
231	.llseek		= seq_lseek,
232	.release	= seq_release,
233};
234
235static const struct file_operations atalk_seq_route_fops = {
236	.owner		= THIS_MODULE,
237	.open		= atalk_seq_route_open,
238	.read		= seq_read,
239	.llseek		= seq_lseek,
240	.release	= seq_release,
241};
242
243static const struct file_operations atalk_seq_socket_fops = {
244	.owner		= THIS_MODULE,
245	.open		= atalk_seq_socket_open,
246	.read		= seq_read,
247	.llseek		= seq_lseek,
248	.release	= seq_release,
249};
250
251static struct proc_dir_entry *atalk_proc_dir;
252
253int __init atalk_proc_init(void)
254{
255	struct proc_dir_entry *p;
256	int rc = -ENOMEM;
257
258	atalk_proc_dir = proc_mkdir("atalk", init_net.proc_net);
259	if (!atalk_proc_dir)
260		goto out;
261
262	p = proc_create("interface", S_IRUGO, atalk_proc_dir,
263			&atalk_seq_interface_fops);
264	if (!p)
265		goto out_interface;
266
267	p = proc_create("route", S_IRUGO, atalk_proc_dir,
268			&atalk_seq_route_fops);
269	if (!p)
270		goto out_route;
271
272	p = proc_create("socket", S_IRUGO, atalk_proc_dir,
273			&atalk_seq_socket_fops);
274	if (!p)
275		goto out_socket;
276
277	p = proc_create("arp", S_IRUGO, atalk_proc_dir, &atalk_seq_arp_fops);
278	if (!p)
279		goto out_arp;
280
281	rc = 0;
282out:
283	return rc;
284out_arp:
285	remove_proc_entry("socket", atalk_proc_dir);
286out_socket:
287	remove_proc_entry("route", atalk_proc_dir);
288out_route:
289	remove_proc_entry("interface", atalk_proc_dir);
290out_interface:
291	remove_proc_entry("atalk", init_net.proc_net);
292	goto out;
293}
294
295void __exit atalk_proc_exit(void)
296{
297	remove_proc_entry("interface", atalk_proc_dir);
298	remove_proc_entry("route", atalk_proc_dir);
299	remove_proc_entry("socket", atalk_proc_dir);
300	remove_proc_entry("arp", atalk_proc_dir);
301	remove_proc_entry("atalk", init_net.proc_net);
302}
303