tcp: implement RFC 5961 3.2
[linux-2.6.git] / net / ipx / ipx_proc.c
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
17 static 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
23 static 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
28 static void ipx_seq_interface_stop(struct seq_file *seq, void *v)
29 {
30         spin_unlock_bh(&ipx_interfaces_lock);
31 }
32
33 static 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, "%08lX   ", (unsigned long int)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");
59 out:
60         return 0;
61 }
62
63 static 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
69 static 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
74 static void ipx_seq_route_stop(struct seq_file *seq, void *v)
75 {
76         read_unlock_bh(&ipx_routes_lock);
77 }
78
79 static 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, "%08lX   ", (unsigned long int)ntohl(rt->ir_net));
91         if (rt->ir_routed)
92                 seq_printf(seq, "%08lX     %02X%02X%02X%02X%02X%02X\n",
93                            (long unsigned int)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");
99 out:
100         return 0;
101 }
102
103 static __inline__ struct sock *ipx_get_socket_idx(loff_t pos)
104 {
105         struct sock *s = NULL;
106         struct hlist_node *node;
107         struct ipx_interface *i;
108
109         list_for_each_entry(i, &ipx_interfaces, node) {
110                 spin_lock_bh(&i->if_sklist_lock);
111                 sk_for_each(s, node, &i->if_sklist) {
112                         if (!pos)
113                                 break;
114                         --pos;
115                 }
116                 spin_unlock_bh(&i->if_sklist_lock);
117                 if (!pos) {
118                         if (node)
119                                 goto found;
120                         break;
121                 }
122         }
123         s = NULL;
124 found:
125         return s;
126 }
127
128 static void *ipx_seq_socket_start(struct seq_file *seq, loff_t *pos)
129 {
130         loff_t l = *pos;
131
132         spin_lock_bh(&ipx_interfaces_lock);
133         return l ? ipx_get_socket_idx(--l) : SEQ_START_TOKEN;
134 }
135
136 static void *ipx_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
137 {
138         struct sock* sk, *next;
139         struct ipx_interface *i;
140         struct ipx_sock *ipxs;
141
142         ++*pos;
143         if (v == SEQ_START_TOKEN) {
144                 sk = NULL;
145                 i = ipx_interfaces_head();
146                 if (!i)
147                         goto out;
148                 sk = sk_head(&i->if_sklist);
149                 if (sk)
150                         spin_lock_bh(&i->if_sklist_lock);
151                 goto out;
152         }
153         sk = v;
154         next = sk_next(sk);
155         if (next) {
156                 sk = next;
157                 goto out;
158         }
159         ipxs = ipx_sk(sk);
160         i = ipxs->intrfc;
161         spin_unlock_bh(&i->if_sklist_lock);
162         sk = NULL;
163         for (;;) {
164                 if (i->node.next == &ipx_interfaces)
165                         break;
166                 i = list_entry(i->node.next, struct ipx_interface, node);
167                 spin_lock_bh(&i->if_sklist_lock);
168                 if (!hlist_empty(&i->if_sklist)) {
169                         sk = sk_head(&i->if_sklist);
170                         break;
171                 }
172                 spin_unlock_bh(&i->if_sklist_lock);
173         }
174 out:
175         return sk;
176 }
177
178 static int ipx_seq_socket_show(struct seq_file *seq, void *v)
179 {
180         struct sock *s;
181         struct ipx_sock *ipxs;
182
183         if (v == SEQ_START_TOKEN) {
184 #ifdef CONFIG_IPX_INTERN
185                 seq_puts(seq, "Local_Address               "
186                               "Remote_Address              Tx_Queue  "
187                               "Rx_Queue  State  Uid\n");
188 #else
189                 seq_puts(seq, "Local_Address  Remote_Address              "
190                               "Tx_Queue  Rx_Queue  State  Uid\n");
191 #endif
192                 goto out;
193         }
194
195         s = v;
196         ipxs = ipx_sk(s);
197 #ifdef CONFIG_IPX_INTERN
198         seq_printf(seq, "%08lX:%02X%02X%02X%02X%02X%02X:%04X  ",
199                    (unsigned long)ntohl(ipxs->intrfc->if_netnum),
200                    ipxs->node[0], ipxs->node[1], ipxs->node[2], ipxs->node[3],
201                    ipxs->node[4], ipxs->node[5], ntohs(ipxs->port));
202 #else
203         seq_printf(seq, "%08lX:%04X  ", (unsigned long) ntohl(ipxs->intrfc->if_netnum),
204                    ntohs(ipxs->port));
205 #endif  /* CONFIG_IPX_INTERN */
206         if (s->sk_state != TCP_ESTABLISHED)
207                 seq_printf(seq, "%-28s", "Not_Connected");
208         else {
209                 seq_printf(seq, "%08lX:%02X%02X%02X%02X%02X%02X:%04X  ",
210                            (unsigned long)ntohl(ipxs->dest_addr.net),
211                            ipxs->dest_addr.node[0], ipxs->dest_addr.node[1],
212                            ipxs->dest_addr.node[2], ipxs->dest_addr.node[3],
213                            ipxs->dest_addr.node[4], ipxs->dest_addr.node[5],
214                            ntohs(ipxs->dest_addr.sock));
215         }
216
217         seq_printf(seq, "%08X  %08X  %02X     %03d\n",
218                    sk_wmem_alloc_get(s),
219                    sk_rmem_alloc_get(s),
220                    s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
221 out:
222         return 0;
223 }
224
225 static 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
232 static 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
239 static 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
246 static int ipx_seq_route_open(struct inode *inode, struct file *file)
247 {
248         return seq_open(file, &ipx_seq_route_ops);
249 }
250
251 static int ipx_seq_interface_open(struct inode *inode, struct file *file)
252 {
253         return seq_open(file, &ipx_seq_interface_ops);
254 }
255
256 static int ipx_seq_socket_open(struct inode *inode, struct file *file)
257 {
258         return seq_open(file, &ipx_seq_socket_ops);
259 }
260
261 static 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
269 static 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
277 static 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
285 static struct proc_dir_entry *ipx_proc_dir;
286
287 int __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;
310 out:
311         return rc;
312 out_socket:
313         remove_proc_entry("route", ipx_proc_dir);
314 out_route:
315         remove_proc_entry("interface", ipx_proc_dir);
316 out_interface:
317         remove_proc_entry("ipx", init_net.proc_net);
318         goto out;
319 }
320
321 void __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
331 int __init ipx_proc_init(void)
332 {
333         return 0;
334 }
335
336 void __exit ipx_proc_exit(void)
337 {
338 }
339
340 #endif /* CONFIG_PROC_FS */