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 static __inline__ struct x25_route *x25_get_route_idx(loff_t pos)
  29 {
  30         struct list_head *route_entry;
  31         struct x25_route *rt = NULL;
  32
  33         list_for_each(route_entry, &x25_route_list) {
  34                 rt = list_entry(route_entry, struct x25_route, node);
  35                 if (!pos--)
  36                         goto found;
  37         }
  38         rt = NULL;
  39 found:
  40         return rt;
  41 }
  42
  43 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
  44 {
  45         loff_t l = *pos;
  46
  47         read_lock_bh(&x25_route_list_lock);
  48         return l ? x25_get_route_idx(--l) : SEQ_START_TOKEN;
  49 }
  50
  51 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  52 {
  53         struct x25_route *rt;
  54
  55         ++*pos;
  56         if (v == SEQ_START_TOKEN) {
  57                 rt = NULL;
  58                 if (!list_empty(&x25_route_list))
  59                         rt = list_entry(x25_route_list.next,
  60                                         struct x25_route, node);
  61                 goto out;
  62         }
  63         rt = v;
  64         if (rt->node.next != &x25_route_list)
  65                 rt = list_entry(rt->node.next, struct x25_route, node);
  66         else
  67                 rt = NULL;
  68 out:
  69         return rt;
  70 }
  71
  72 static void x25_seq_route_stop(struct seq_file *seq, void *v)
  73 {
  74         read_unlock_bh(&x25_route_list_lock);
  75 }
  76
  77 static int x25_seq_route_show(struct seq_file *seq, void *v)
  78 {
  79         struct x25_route *rt;
  80
  81         if (v == SEQ_START_TOKEN) {
  82                 seq_puts(seq, "Address          Digits  Device\n");
  83                 goto out;
  84         }
  85
  86         rt = v;
  87         seq_printf(seq, "%-15s  %-6d  %-5s\n",
  88                    rt->address.x25_addr, rt->sigdigits,
  89                    rt->dev ? rt->dev->name : "???");
  90 out:
  91         return 0;
  92 }
  93
  94 static __inline__ struct sock *x25_get_socket_idx(loff_t pos)
  95 {
  96         struct sock *s;
  97         struct hlist_node *node;
  98
  99         sk_for_each(s, node, &x25_list)
 100                 if (!pos--)
 101                         goto found;
 102         s = NULL;
 103 found:
 104         return s;
 105 }
 106
 107 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
 108 {
 109         loff_t l = *pos;
 110
 111         read_lock_bh(&x25_list_lock);
 112         return l ? x25_get_socket_idx(--l) : SEQ_START_TOKEN;
 113 }
 114
 115 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 116 {
 117         struct sock *s;
 118
 119         ++*pos;
 120         if (v == SEQ_START_TOKEN) {
 121                 s = sk_head(&x25_list);
 122                 goto out;
 123         }
 124         s = sk_next(v);
 125 out:
 126         return s;
 127 }
 128
 129 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
 130 {
 131         read_unlock_bh(&x25_list_lock);
 132 }
 133
 134 static int x25_seq_socket_show(struct seq_file *seq, void *v)
 135 {
 136         struct sock *s;
 137         struct x25_sock *x25;
 138         struct net_device *dev;
 139         const char *devname;
 140
 141         if (v == SEQ_START_TOKEN) {
 142                 seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
 143                                 "va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
 144                 goto out;
 145         }
 146
 147         s = v;
 148         x25 = x25_sk(s);
 149
 150         if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
 151                 devname = "???";
 152         else
 153                 devname = x25->neighbour->dev->name;
 154
 155         seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
 156                         "%3lu %3lu %3lu %5d %5d %ld\n",
 157                    !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
 158                    !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
 159                    devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
 160                    x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
 161                    x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
 162                    atomic_read(&s->sk_wmem_alloc),
 163                    atomic_read(&s->sk_rmem_alloc),
 164                    s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
 165 out:
 166         return 0;
 167 }
 168
 169 static __inline__ struct x25_forward *x25_get_forward_idx(loff_t pos)
 170 {
 171         struct x25_forward *f;
 172         struct list_head *entry;
 173
 174         list_for_each(entry, &x25_forward_list) {
 175                 f = list_entry(entry, struct x25_forward, node);
 176                 if (!pos--)
 177                         goto found;
 178         }
 179
 180         f = NULL;
 181 found:
 182         return f;
 183 }
 184
 185 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
 186 {
 187         loff_t l = *pos;
 188
 189         read_lock_bh(&x25_forward_list_lock);
 190         return l ? x25_get_forward_idx(--l) : SEQ_START_TOKEN;
 191 }
 192
 193 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
 194 {
 195         struct x25_forward *f;
 196
 197         ++*pos;
 198         if (v == SEQ_START_TOKEN) {
 199                 f = NULL;
 200                 if (!list_empty(&x25_forward_list))
 201                         f = list_entry(x25_forward_list.next,
 202                                         struct x25_forward, node);
 203                 goto out;
 204         }
 205         f = v;
 206         if (f->node.next != &x25_forward_list)
 207                 f = list_entry(f->node.next, struct x25_forward, node);
 208         else
 209                 f = NULL;
 210 out:
 211         return f;
 212
 213 }
 214
 215 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
 216 {
 217         read_unlock_bh(&x25_forward_list_lock);
 218 }
 219
 220 static int x25_seq_forward_show(struct seq_file *seq, void *v)
 221 {
 222         struct x25_forward *f;
 223
 224         if (v == SEQ_START_TOKEN) {
 225                 seq_printf(seq, "lci dev1       dev2\n");
 226                 goto out;
 227         }
 228
 229         f = v;
 230
 231         seq_printf(seq, "%d %-10s %-10s\n",
 232                         f->lci, f->dev1->name, f->dev2->name);
 233
 234 out:
 235         return 0;
 236 }
 237
 238 static const struct seq_operations x25_seq_route_ops = {
 239         .start  = x25_seq_route_start,
 240         .next   = x25_seq_route_next,
 241         .stop   = x25_seq_route_stop,
 242         .show   = x25_seq_route_show,
 243 };
 244
 245 static const struct seq_operations x25_seq_socket_ops = {
 246         .start  = x25_seq_socket_start,
 247         .next   = x25_seq_socket_next,
 248         .stop   = x25_seq_socket_stop,
 249         .show   = x25_seq_socket_show,
 250 };
 251
 252 static const struct seq_operations x25_seq_forward_ops = {
 253         .start  = x25_seq_forward_start,
 254         .next   = x25_seq_forward_next,
 255         .stop   = x25_seq_forward_stop,
 256         .show   = x25_seq_forward_show,
 257 };
 258
 259 static int x25_seq_socket_open(struct inode *inode, struct file *file)
 260 {
 261         return seq_open(file, &x25_seq_socket_ops);
 262 }
 263
 264 static int x25_seq_route_open(struct inode *inode, struct file *file)
 265 {
 266         return seq_open(file, &x25_seq_route_ops);
 267 }
 268
 269 static int x25_seq_forward_open(struct inode *inode, struct file *file)
 270 {
 271         return seq_open(file, &x25_seq_forward_ops);
 272 }
 273
 274 static const struct file_operations x25_seq_socket_fops = {
 275         .owner          = THIS_MODULE,
 276         .open           = x25_seq_socket_open,
 277         .read           = seq_read,
 278         .llseek         = seq_lseek,
 279         .release        = seq_release,
 280 };
 281
 282 static const struct file_operations x25_seq_route_fops = {
 283         .owner          = THIS_MODULE,
 284         .open           = x25_seq_route_open,
 285         .read           = seq_read,
 286         .llseek         = seq_lseek,
 287         .release        = seq_release,
 288 };
 289
 290 static struct file_operations x25_seq_forward_fops = {
 291         .owner          = THIS_MODULE,
 292         .open           = x25_seq_forward_open,
 293         .read           = seq_read,
 294         .llseek         = seq_lseek,
 295         .release        = seq_release,
 296 };
 297
 298 static struct proc_dir_entry *x25_proc_dir;
 299
 300 int __init x25_proc_init(void)
 301 {
 302         struct proc_dir_entry *p;
 303         int rc = -ENOMEM;
 304
 305         x25_proc_dir = proc_mkdir("x25", init_net.proc_net);
 306         if (!x25_proc_dir)
 307                 goto out;
 308
 309         p = create_proc_entry("route", S_IRUGO, x25_proc_dir);
 310         if (!p)
 311                 goto out_route;
 312         p->proc_fops = &x25_seq_route_fops;
 313
 314         p = create_proc_entry("socket", S_IRUGO, x25_proc_dir);
 315         if (!p)
 316                 goto out_socket;
 317         p->proc_fops = &x25_seq_socket_fops;
 318
 319         p = create_proc_entry("forward", S_IRUGO, x25_proc_dir);
 320         if (!p)
 321                 goto out_forward;
 322         p->proc_fops = &x25_seq_forward_fops;
 323         rc = 0;
 324
 325 out:
 326         return rc;
 327 out_forward:
 328         remove_proc_entry("socket", x25_proc_dir);
 329 out_socket:
 330         remove_proc_entry("route", x25_proc_dir);
 331 out_route:
 332         remove_proc_entry("x25", init_net.proc_net);
 333         goto out;
 334 }
 335
 336 void __exit x25_proc_exit(void)
 337 {
 338         remove_proc_entry("forward", x25_proc_dir);
 339         remove_proc_entry("route", x25_proc_dir);
 340         remove_proc_entry("socket", x25_proc_dir);
 341         remove_proc_entry("x25", init_net.proc_net);
 342 }
 343
 344 #else /* CONFIG_PROC_FS */
 345
 346 int __init x25_proc_init(void)
 347 {
 348         return 0;
 349 }
 350
 351 void __exit x25_proc_exit(void)
 352 {
 353 }
 354 #endif /* CONFIG_PROC_FS */