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