net/x25/x25_proc.c

   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 <net/net_namespace.h>
  24 #include <net/sock.h>
  25 #include <net/x25.h>
  26
  27 #ifdef CONFIG_PROC_FS
  28
  29 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
  30         __acquires(x25_route_list_lock)
  31 {
  32         read_lock_bh(&x25_route_list_lock);
  33         return seq_list_start_head(&x25_route_list, *pos);
  34 }
  35
  36 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  37 {
  38         return seq_list_next(v, &x25_route_list, pos);
  39 }
  40
  41 static void x25_seq_route_stop(struct seq_file *seq, void *v)
  42         __releases(x25_route_list_lock)
  43 {
  44         read_unlock_bh(&x25_route_list_lock);
  45 }
  46
  47 static int x25_seq_route_show(struct seq_file *seq, void *v)
  48 {
  49         struct x25_route *rt = list_entry(v, struct x25_route, node);
  50
  51         if (v == &x25_route_list) {
  52                 seq_puts(seq, "Address          Digits  Device\n");
  53                 goto out;
  54         }
  55
  56         rt = v;
  57         seq_printf(seq, "%-15s  %-6d  %-5s\n",
  58                    rt->address.x25_addr, rt->sigdigits,
  59                    rt->dev ? rt->dev->name : "???");
  60 out:
  61         return 0;
  62 }
  63
  64 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
  65         __acquires(x25_list_lock)
  66 {
  67         read_lock_bh(&x25_list_lock);
  68         return seq_hlist_start_head(&x25_list, *pos);
  69 }
  70
  71 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
  72 {
  73         return seq_hlist_next(v, &x25_list, pos);
  74 }
  75
  76 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
  77         __releases(x25_list_lock)
  78 {
  79         read_unlock_bh(&x25_list_lock);
  80 }
  81
  82 static int x25_seq_socket_show(struct seq_file *seq, void *v)
  83 {
  84         struct sock *s;
  85         struct x25_sock *x25;
  86         struct net_device *dev;
  87         const char *devname;
  88
  89         if (v == SEQ_START_TOKEN) {
  90                 seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
  91                                 "va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
  92                 goto out;
  93         }
  94
  95         s = sk_entry(v);
  96         x25 = x25_sk(s);
  97
  98         if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
  99                 devname = "???";
 100         else
 101                 devname = x25->neighbour->dev->name;
 102
 103         seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
 104                         "%3lu %3lu %3lu %5d %5d %ld\n",
 105                    !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
 106                    !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
 107                    devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
 108                    x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
 109                    x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
 110                    sk_wmem_alloc_get(s),
 111                    sk_rmem_alloc_get(s),
 112                    s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
 113 out:
 114         return 0;
 115 }
 116
 117 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
 118         __acquires(x25_forward_list_lock)
 119 {
 120         read_lock_bh(&x25_forward_list_lock);
 121         return seq_list_start_head(&x25_forward_list, *pos);
 122 }
 123
 124 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
 125 {
 126         return seq_list_next(v, &x25_forward_list, pos);
 127 }
 128
 129 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
 130         __releases(x25_forward_list_lock)
 131 {
 132         read_unlock_bh(&x25_forward_list_lock);
 133 }
 134
 135 static int x25_seq_forward_show(struct seq_file *seq, void *v)
 136 {
 137         struct x25_forward *f = list_entry(v, struct x25_forward, node);
 138
 139         if (v == &x25_forward_list) {
 140                 seq_printf(seq, "lci dev1       dev2\n");
 141                 goto out;
 142         }
 143
 144         f = v;
 145
 146         seq_printf(seq, "%d %-10s %-10s\n",
 147                         f->lci, f->dev1->name, f->dev2->name);
 148 out:
 149         return 0;
 150 }
 151
 152 static const struct seq_operations x25_seq_route_ops = {
 153         .start  = x25_seq_route_start,
 154         .next   = x25_seq_route_next,
 155         .stop   = x25_seq_route_stop,
 156         .show   = x25_seq_route_show,
 157 };
 158
 159 static const struct seq_operations x25_seq_socket_ops = {
 160         .start  = x25_seq_socket_start,
 161         .next   = x25_seq_socket_next,
 162         .stop   = x25_seq_socket_stop,
 163         .show   = x25_seq_socket_show,
 164 };
 165
 166 static const struct seq_operations x25_seq_forward_ops = {
 167         .start  = x25_seq_forward_start,
 168         .next   = x25_seq_forward_next,
 169         .stop   = x25_seq_forward_stop,
 170         .show   = x25_seq_forward_show,
 171 };
 172
 173 static int x25_seq_socket_open(struct inode *inode, struct file *file)
 174 {
 175         return seq_open(file, &x25_seq_socket_ops);
 176 }
 177
 178 static int x25_seq_route_open(struct inode *inode, struct file *file)
 179 {
 180         return seq_open(file, &x25_seq_route_ops);
 181 }
 182
 183 static int x25_seq_forward_open(struct inode *inode, struct file *file)
 184 {
 185         return seq_open(file, &x25_seq_forward_ops);
 186 }
 187
 188 static const struct file_operations x25_seq_socket_fops = {
 189         .owner          = THIS_MODULE,
 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         .owner          = THIS_MODULE,
 198         .open           = x25_seq_route_open,
 199         .read           = seq_read,
 200         .llseek         = seq_lseek,
 201         .release        = seq_release,
 202 };
 203
 204 static const struct file_operations x25_seq_forward_fops = {
 205         .owner          = THIS_MODULE,
 206         .open           = x25_seq_forward_open,
 207         .read           = seq_read,
 208         .llseek         = seq_lseek,
 209         .release        = seq_release,
 210 };
 211
 212 static struct proc_dir_entry *x25_proc_dir;
 213
 214 int __init x25_proc_init(void)
 215 {
 216         struct proc_dir_entry *p;
 217         int rc = -ENOMEM;
 218
 219         x25_proc_dir = proc_mkdir("x25", init_net.proc_net);
 220         if (!x25_proc_dir)
 221                 goto out;
 222
 223         p = proc_create("route", S_IRUGO, x25_proc_dir, &x25_seq_route_fops);
 224         if (!p)
 225                 goto out_route;
 226
 227         p = proc_create("socket", S_IRUGO, x25_proc_dir, &x25_seq_socket_fops);
 228         if (!p)
 229                 goto out_socket;
 230
 231         p = proc_create("forward", S_IRUGO, x25_proc_dir,
 232                         &x25_seq_forward_fops);
 233         if (!p)
 234                 goto out_forward;
 235         rc = 0;
 236
 237 out:
 238         return rc;
 239 out_forward:
 240         remove_proc_entry("socket", x25_proc_dir);
 241 out_socket:
 242         remove_proc_entry("route", x25_proc_dir);
 243 out_route:
 244         remove_proc_entry("x25", init_net.proc_net);
 245         goto out;
 246 }
 247
 248 void __exit x25_proc_exit(void)
 249 {
 250         remove_proc_entry("forward", x25_proc_dir);
 251         remove_proc_entry("route", x25_proc_dir);
 252         remove_proc_entry("socket", x25_proc_dir);
 253         remove_proc_entry("x25", init_net.proc_net);
 254 }
 255
 256 #else /* CONFIG_PROC_FS */
 257
 258 int __init x25_proc_init(void)
 259 {
 260         return 0;
 261 }
 262
 263 void __exit x25_proc_exit(void)
 264 {
 265 }
 266 #endif /* CONFIG_PROC_FS */