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Linux/net/x25/x25_proc.c

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  1 /*
  2  *      X.25 Packet Layer release 002
  3  *
  4  *      This is ALPHA test software. This code may break your machine,
  5  *      randomly fail to work with new releases, misbehave and/or generally
  6  *      screw up. It might even work.
  7  *
  8  *      This code REQUIRES 2.4 with seq_file support
  9  *
 10  *      This module:
 11  *              This module is free software; you can redistribute it and/or
 12  *              modify it under the terms of the GNU General Public License
 13  *              as published by the Free Software Foundation; either version
 14  *              2 of the License, or (at your option) any later version.
 15  *
 16  *      History
 17  *      2002/10/06      Arnaldo Carvalho de Melo  seq_file support
 18  */
 19 
 20 #include <linux/init.h>
 21 #include <linux/proc_fs.h>
 22 #include <linux/seq_file.h>
 23 #include <linux/export.h>
 24 #include <net/net_namespace.h>
 25 #include <net/sock.h>
 26 #include <net/x25.h>
 27 
 28 #ifdef CONFIG_PROC_FS
 29 
 30 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
 31         __acquires(x25_route_list_lock)
 32 {
 33         read_lock_bh(&x25_route_list_lock);
 34         return seq_list_start_head(&x25_route_list, *pos);
 35 }
 36 
 37 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
 38 {
 39         return seq_list_next(v, &x25_route_list, pos);
 40 }
 41 
 42 static void x25_seq_route_stop(struct seq_file *seq, void *v)
 43         __releases(x25_route_list_lock)
 44 {
 45         read_unlock_bh(&x25_route_list_lock);
 46 }
 47 
 48 static int x25_seq_route_show(struct seq_file *seq, void *v)
 49 {
 50         struct x25_route *rt = list_entry(v, struct x25_route, node);
 51 
 52         if (v == &x25_route_list) {
 53                 seq_puts(seq, "Address          Digits  Device\n");
 54                 goto out;
 55         }
 56 
 57         rt = v;
 58         seq_printf(seq, "%-15s  %-6d  %-5s\n",
 59                    rt->address.x25_addr, rt->sigdigits,
 60                    rt->dev ? rt->dev->name : "???");
 61 out:
 62         return 0;
 63 }
 64 
 65 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
 66         __acquires(x25_list_lock)
 67 {
 68         read_lock_bh(&x25_list_lock);
 69         return seq_hlist_start_head(&x25_list, *pos);
 70 }
 71 
 72 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 73 {
 74         return seq_hlist_next(v, &x25_list, pos);
 75 }
 76 
 77 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
 78         __releases(x25_list_lock)
 79 {
 80         read_unlock_bh(&x25_list_lock);
 81 }
 82 
 83 static int x25_seq_socket_show(struct seq_file *seq, void *v)
 84 {
 85         struct sock *s;
 86         struct x25_sock *x25;
 87         struct net_device *dev;
 88         const char *devname;
 89 
 90         if (v == SEQ_START_TOKEN) {
 91                 seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
 92                                 "va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
 93                 goto out;
 94         }
 95 
 96         s = sk_entry(v);
 97         x25 = x25_sk(s);
 98 
 99         if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
100                 devname = "???";
101         else
102                 devname = x25->neighbour->dev->name;
103 
104         seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
105                         "%3lu %3lu %3lu %5d %5d %ld\n",
106                    !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
107                    !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
108                    devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
109                    x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
110                    x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
111                    sk_wmem_alloc_get(s),
112                    sk_rmem_alloc_get(s),
113                    s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
114 out:
115         return 0;
116 }
117 
118 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
119         __acquires(x25_forward_list_lock)
120 {
121         read_lock_bh(&x25_forward_list_lock);
122         return seq_list_start_head(&x25_forward_list, *pos);
123 }
124 
125 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
126 {
127         return seq_list_next(v, &x25_forward_list, pos);
128 }
129 
130 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
131         __releases(x25_forward_list_lock)
132 {
133         read_unlock_bh(&x25_forward_list_lock);
134 }
135 
136 static int x25_seq_forward_show(struct seq_file *seq, void *v)
137 {
138         struct x25_forward *f = list_entry(v, struct x25_forward, node);
139 
140         if (v == &x25_forward_list) {
141                 seq_printf(seq, "lci dev1       dev2\n");
142                 goto out;
143         }
144 
145         f = v;
146 
147         seq_printf(seq, "%d %-10s %-10s\n",
148                         f->lci, f->dev1->name, f->dev2->name);
149 out:
150         return 0;
151 }
152 
153 static const struct seq_operations x25_seq_route_ops = {
154         .start  = x25_seq_route_start,
155         .next   = x25_seq_route_next,
156         .stop   = x25_seq_route_stop,
157         .show   = x25_seq_route_show,
158 };
159 
160 static const struct seq_operations x25_seq_socket_ops = {
161         .start  = x25_seq_socket_start,
162         .next   = x25_seq_socket_next,
163         .stop   = x25_seq_socket_stop,
164         .show   = x25_seq_socket_show,
165 };
166 
167 static const struct seq_operations x25_seq_forward_ops = {
168         .start  = x25_seq_forward_start,
169         .next   = x25_seq_forward_next,
170         .stop   = x25_seq_forward_stop,
171         .show   = x25_seq_forward_show,
172 };
173 
174 static int x25_seq_socket_open(struct inode *inode, struct file *file)
175 {
176         return seq_open(file, &x25_seq_socket_ops);
177 }
178 
179 static int x25_seq_route_open(struct inode *inode, struct file *file)
180 {
181         return seq_open(file, &x25_seq_route_ops);
182 }
183 
184 static int x25_seq_forward_open(struct inode *inode, struct file *file)
185 {
186         return seq_open(file, &x25_seq_forward_ops);
187 }
188 
189 static const struct file_operations x25_seq_socket_fops = {
190         .open           = x25_seq_socket_open,
191         .read           = seq_read,
192         .llseek         = seq_lseek,
193         .release        = seq_release,
194 };
195 
196 static const struct file_operations x25_seq_route_fops = {
197         .open           = x25_seq_route_open,
198         .read           = seq_read,
199         .llseek         = seq_lseek,
200         .release        = seq_release,
201 };
202 
203 static const struct file_operations x25_seq_forward_fops = {
204         .open           = x25_seq_forward_open,
205         .read           = seq_read,
206         .llseek         = seq_lseek,
207         .release        = seq_release,
208 };
209 
210 int __init x25_proc_init(void)
211 {
212         if (!proc_mkdir("x25", init_net.proc_net))
213                 return -ENOMEM;
214 
215         if (!proc_create("x25/route", S_IRUGO, init_net.proc_net,
216                         &x25_seq_route_fops))
217                 goto out;
218 
219         if (!proc_create("x25/socket", S_IRUGO, init_net.proc_net,
220                         &x25_seq_socket_fops))
221                 goto out;
222 
223         if (!proc_create("x25/forward", S_IRUGO, init_net.proc_net,
224                         &x25_seq_forward_fops))
225                 goto out;
226         return 0;
227 
228 out:
229         remove_proc_subtree("x25", init_net.proc_net);
230         return -ENOMEM;
231 }
232 
233 void __exit x25_proc_exit(void)
234 {
235         remove_proc_subtree("x25", init_net.proc_net);
236 }
237 
238 #else /* CONFIG_PROC_FS */
239 
240 int __init x25_proc_init(void)
241 {
242         return 0;
243 }
244 
245 void __exit x25_proc_exit(void)
246 {
247 }
248 #endif /* CONFIG_PROC_FS */
249 

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