[PATCH] mark struct file_operations const 7
[linux-2.6.git] / net / appletalk / atalk_proc.c
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
18 static __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
28 static 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
36 static 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;
49 out:
50         return i;
51 }
52
53 static void atalk_seq_interface_stop(struct seq_file *seq, void *v)
54 {
55         read_unlock_bh(&atalk_interfaces_lock);
56 }
57
58 static 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);
73 out:
74         return 0;
75 }
76
77 static __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
87 static 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
95 static 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;
108 out:
109         return r;
110 }
111
112 static void atalk_seq_route_stop(struct seq_file *seq, void *v)
113 {
114         read_unlock_bh(&atalk_routes_lock);
115 }
116
117 static 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);
138 out:
139         return 0;
140 }
141
142 static __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;
151 found:
152         return s;
153 }
154
155 static 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
163 static 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);
173 out:
174         return i;
175 }
176
177 static void atalk_seq_socket_stop(struct seq_file *seq, void *v)
178 {
179         read_unlock_bh(&atalk_sockets_lock);
180 }
181
182 static 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);
203 out:
204         return 0;
205 }
206
207 static 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
214 static 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
221 static 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
228 static int atalk_seq_interface_open(struct inode *inode, struct file *file)
229 {
230         return seq_open(file, &atalk_seq_interface_ops);
231 }
232
233 static int atalk_seq_route_open(struct inode *inode, struct file *file)
234 {
235         return seq_open(file, &atalk_seq_route_ops);
236 }
237
238 static int atalk_seq_socket_open(struct inode *inode, struct file *file)
239 {
240         return seq_open(file, &atalk_seq_socket_ops);
241 }
242
243 static const 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
251 static const 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
259 static const 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
267 static struct proc_dir_entry *atalk_proc_dir;
268
269 int __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;
300 out:
301         return rc;
302 out_arp:
303         remove_proc_entry("socket", atalk_proc_dir);
304 out_socket:
305         remove_proc_entry("route", atalk_proc_dir);
306 out_route:
307         remove_proc_entry("interface", atalk_proc_dir);
308 out_interface:
309         remove_proc_entry("atalk", proc_net);
310         goto out;
311 }
312
313 void __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 }