1/*
2 *	IPX proc routines
3 *
4 * 	Copyright(C) Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 2002
5 */
6
7#include <linux/init.h>
8#ifdef CONFIG_PROC_FS
9#include <linux/proc_fs.h>
10#include <linux/spinlock.h>
11#include <linux/seq_file.h>
12#include <linux/export.h>
13#include <net/net_namespace.h>
14#include <net/tcp_states.h>
15#include <net/ipx.h>
16
17static void *ipx_seq_interface_start(struct seq_file *seq, loff_t *pos)
18{
19	spin_lock_bh(&ipx_interfaces_lock);
20	return seq_list_start_head(&ipx_interfaces, *pos);
21}
22
23static void *ipx_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos)
24{
25	return seq_list_next(v, &ipx_interfaces, pos);
26}
27
28static void ipx_seq_interface_stop(struct seq_file *seq, void *v)
29{
30	spin_unlock_bh(&ipx_interfaces_lock);
31}
32
33static int ipx_seq_interface_show(struct seq_file *seq, void *v)
34{
35	struct ipx_interface *i;
36
37	if (v == &ipx_interfaces) {
38		seq_puts(seq, "Network    Node_Address   Primary  Device     "
39			      "Frame_Type");
40#ifdef IPX_REFCNT_DEBUG
41		seq_puts(seq, "  refcnt");
42#endif
43		seq_puts(seq, "\n");
44		goto out;
45	}
46
47	i = list_entry(v, struct ipx_interface, node);
48	seq_printf(seq, "%08X   ", ntohl(i->if_netnum));
49	seq_printf(seq, "%02X%02X%02X%02X%02X%02X   ",
50			i->if_node[0], i->if_node[1], i->if_node[2],
51			i->if_node[3], i->if_node[4], i->if_node[5]);
52	seq_printf(seq, "%-9s", i == ipx_primary_net ? "Yes" : "No");
53	seq_printf(seq, "%-11s", ipx_device_name(i));
54	seq_printf(seq, "%-9s", ipx_frame_name(i->if_dlink_type));
55#ifdef IPX_REFCNT_DEBUG
56	seq_printf(seq, "%6d", atomic_read(&i->refcnt));
57#endif
58	seq_puts(seq, "\n");
59out:
60	return 0;
61}
62
63static void *ipx_seq_route_start(struct seq_file *seq, loff_t *pos)
64{
65	read_lock_bh(&ipx_routes_lock);
66	return seq_list_start_head(&ipx_routes, *pos);
67}
68
69static void *ipx_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
70{
71	return seq_list_next(v, &ipx_routes, pos);
72}
73
74static void ipx_seq_route_stop(struct seq_file *seq, void *v)
75{
76	read_unlock_bh(&ipx_routes_lock);
77}
78
79static int ipx_seq_route_show(struct seq_file *seq, void *v)
80{
81	struct ipx_route *rt;
82
83	if (v == &ipx_routes) {
84		seq_puts(seq, "Network    Router_Net   Router_Node\n");
85		goto out;
86	}
87
88	rt = list_entry(v, struct ipx_route, node);
89
90	seq_printf(seq, "%08X   ", ntohl(rt->ir_net));
91	if (rt->ir_routed)
92		seq_printf(seq, "%08X     %02X%02X%02X%02X%02X%02X\n",
93			   ntohl(rt->ir_intrfc->if_netnum),
94			   rt->ir_router_node[0], rt->ir_router_node[1],
95			   rt->ir_router_node[2], rt->ir_router_node[3],
96			   rt->ir_router_node[4], rt->ir_router_node[5]);
97	else
98		seq_puts(seq, "Directly     Connected\n");
99out:
100	return 0;
101}
102
103static __inline__ struct sock *ipx_get_socket_idx(loff_t pos)
104{
105	struct sock *s = NULL;
106	struct ipx_interface *i;
107
108	list_for_each_entry(i, &ipx_interfaces, node) {
109		spin_lock_bh(&i->if_sklist_lock);
110		sk_for_each(s, &i->if_sklist) {
111			if (!pos)
112				break;
113			--pos;
114		}
115		spin_unlock_bh(&i->if_sklist_lock);
116		if (!pos) {
117			if (s)
118				goto found;
119			break;
120		}
121	}
122	s = NULL;
123found:
124	return s;
125}
126
127static void *ipx_seq_socket_start(struct seq_file *seq, loff_t *pos)
128{
129	loff_t l = *pos;
130
131	spin_lock_bh(&ipx_interfaces_lock);
132	return l ? ipx_get_socket_idx(--l) : SEQ_START_TOKEN;
133}
134
135static void *ipx_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
136{
137	struct sock* sk, *next;
138	struct ipx_interface *i;
139	struct ipx_sock *ipxs;
140
141	++*pos;
142	if (v == SEQ_START_TOKEN) {
143		sk = NULL;
144		i = ipx_interfaces_head();
145		if (!i)
146			goto out;
147		sk = sk_head(&i->if_sklist);
148		if (sk)
149			spin_lock_bh(&i->if_sklist_lock);
150		goto out;
151	}
152	sk = v;
153	next = sk_next(sk);
154	if (next) {
155		sk = next;
156		goto out;
157	}
158	ipxs = ipx_sk(sk);
159	i = ipxs->intrfc;
160	spin_unlock_bh(&i->if_sklist_lock);
161	sk = NULL;
162	for (;;) {
163		if (i->node.next == &ipx_interfaces)
164			break;
165		i = list_entry(i->node.next, struct ipx_interface, node);
166		spin_lock_bh(&i->if_sklist_lock);
167		if (!hlist_empty(&i->if_sklist)) {
168			sk = sk_head(&i->if_sklist);
169			break;
170		}
171		spin_unlock_bh(&i->if_sklist_lock);
172	}
173out:
174	return sk;
175}
176
177static int ipx_seq_socket_show(struct seq_file *seq, void *v)
178{
179	struct sock *s;
180	struct ipx_sock *ipxs;
181
182	if (v == SEQ_START_TOKEN) {
183#ifdef CONFIG_IPX_INTERN
184		seq_puts(seq, "Local_Address               "
185			      "Remote_Address              Tx_Queue  "
186			      "Rx_Queue  State  Uid\n");
187#else
188		seq_puts(seq, "Local_Address  Remote_Address              "
189			      "Tx_Queue  Rx_Queue  State  Uid\n");
190#endif
191		goto out;
192	}
193
194	s = v;
195	ipxs = ipx_sk(s);
196#ifdef CONFIG_IPX_INTERN
197	seq_printf(seq, "%08X:%02X%02X%02X%02X%02X%02X:%04X  ",
198		   ntohl(ipxs->intrfc->if_netnum),
199		   ipxs->node[0], ipxs->node[1], ipxs->node[2], ipxs->node[3],
200		   ipxs->node[4], ipxs->node[5], ntohs(ipxs->port));
201#else
202	seq_printf(seq, "%08X:%04X  ", ntohl(ipxs->intrfc->if_netnum),
203		   ntohs(ipxs->port));
204#endif	/* CONFIG_IPX_INTERN */
205	if (s->sk_state != TCP_ESTABLISHED)
206		seq_printf(seq, "%-28s", "Not_Connected");
207	else {
208		seq_printf(seq, "%08X:%02X%02X%02X%02X%02X%02X:%04X  ",
209			   ntohl(ipxs->dest_addr.net),
210			   ipxs->dest_addr.node[0], ipxs->dest_addr.node[1],
211			   ipxs->dest_addr.node[2], ipxs->dest_addr.node[3],
212			   ipxs->dest_addr.node[4], ipxs->dest_addr.node[5],
213			   ntohs(ipxs->dest_addr.sock));
214	}
215
216	seq_printf(seq, "%08X  %08X  %02X     %03u\n",
217		   sk_wmem_alloc_get(s),
218		   sk_rmem_alloc_get(s),
219		   s->sk_state,
220		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)));
221out:
222	return 0;
223}
224
225static const struct seq_operations ipx_seq_interface_ops = {
226	.start  = ipx_seq_interface_start,
227	.next   = ipx_seq_interface_next,
228	.stop   = ipx_seq_interface_stop,
229	.show   = ipx_seq_interface_show,
230};
231
232static const struct seq_operations ipx_seq_route_ops = {
233	.start  = ipx_seq_route_start,
234	.next   = ipx_seq_route_next,
235	.stop   = ipx_seq_route_stop,
236	.show   = ipx_seq_route_show,
237};
238
239static const struct seq_operations ipx_seq_socket_ops = {
240	.start  = ipx_seq_socket_start,
241	.next   = ipx_seq_socket_next,
242	.stop   = ipx_seq_interface_stop,
243	.show   = ipx_seq_socket_show,
244};
245
246static int ipx_seq_route_open(struct inode *inode, struct file *file)
247{
248	return seq_open(file, &ipx_seq_route_ops);
249}
250
251static int ipx_seq_interface_open(struct inode *inode, struct file *file)
252{
253	return seq_open(file, &ipx_seq_interface_ops);
254}
255
256static int ipx_seq_socket_open(struct inode *inode, struct file *file)
257{
258	return seq_open(file, &ipx_seq_socket_ops);
259}
260
261static const struct file_operations ipx_seq_interface_fops = {
262	.owner		= THIS_MODULE,
263	.open           = ipx_seq_interface_open,
264	.read           = seq_read,
265	.llseek         = seq_lseek,
266	.release        = seq_release,
267};
268
269static const struct file_operations ipx_seq_route_fops = {
270	.owner		= THIS_MODULE,
271	.open           = ipx_seq_route_open,
272	.read           = seq_read,
273	.llseek         = seq_lseek,
274	.release        = seq_release,
275};
276
277static const struct file_operations ipx_seq_socket_fops = {
278	.owner		= THIS_MODULE,
279	.open           = ipx_seq_socket_open,
280	.read           = seq_read,
281	.llseek         = seq_lseek,
282	.release        = seq_release,
283};
284
285static struct proc_dir_entry *ipx_proc_dir;
286
287int __init ipx_proc_init(void)
288{
289	struct proc_dir_entry *p;
290	int rc = -ENOMEM;
291
292	ipx_proc_dir = proc_mkdir("ipx", init_net.proc_net);
293
294	if (!ipx_proc_dir)
295		goto out;
296	p = proc_create("interface", S_IRUGO,
297			ipx_proc_dir, &ipx_seq_interface_fops);
298	if (!p)
299		goto out_interface;
300
301	p = proc_create("route", S_IRUGO, ipx_proc_dir, &ipx_seq_route_fops);
302	if (!p)
303		goto out_route;
304
305	p = proc_create("socket", S_IRUGO, ipx_proc_dir, &ipx_seq_socket_fops);
306	if (!p)
307		goto out_socket;
308
309	rc = 0;
310out:
311	return rc;
312out_socket:
313	remove_proc_entry("route", ipx_proc_dir);
314out_route:
315	remove_proc_entry("interface", ipx_proc_dir);
316out_interface:
317	remove_proc_entry("ipx", init_net.proc_net);
318	goto out;
319}
320
321void __exit ipx_proc_exit(void)
322{
323	remove_proc_entry("interface", ipx_proc_dir);
324	remove_proc_entry("route", ipx_proc_dir);
325	remove_proc_entry("socket", ipx_proc_dir);
326	remove_proc_entry("ipx", init_net.proc_net);
327}
328
329#else /* CONFIG_PROC_FS */
330
331int __init ipx_proc_init(void)
332{
333	return 0;
334}
335
336void __exit ipx_proc_exit(void)
337{
338}
339
340#endif /* CONFIG_PROC_FS */
341