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/sock.h>
  24 #include <net/x25.h>
  25
  26 #ifdef CONFIG_PROC_FS
  27 static __inline__ struct x25_route *x25_get_route_idx(loff_t pos)
  28 {
  29         struct list_head *route_entry;
  30         struct x25_route *rt = NULL;
  31
  32         list_for_each(route_entry, &x25_route_list) {
  33                 rt = list_entry(route_entry, struct x25_route, node);
  34                 if (!pos--)
  35                         goto found;
  36         }
  37         rt = NULL;
  38 found:
  39         return rt;
  40 }
  41
  42 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
  43 {
  44         loff_t l = *pos;
  45
  46         read_lock_bh(&x25_route_list_lock);
  47         return l ? x25_get_route_idx(--l) : SEQ_START_TOKEN;
  48 }
  49
  50 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  51 {
  52         struct x25_route *rt;
  53
  54         ++*pos;
  55         if (v == SEQ_START_TOKEN) {
  56                 rt = NULL;
  57                 if (!list_empty(&x25_route_list))
  58                         rt = list_entry(x25_route_list.next,
  59                                         struct x25_route, node);
  60                 goto out;
  61         }
  62         rt = v;
  63         if (rt->node.next != &x25_route_list)
  64                 rt = list_entry(rt->node.next, struct x25_route, node);
  65         else
  66                 rt = NULL;
  67 out:
  68         return rt;
  69 }
  70
  71 static void x25_seq_route_stop(struct seq_file *seq, void *v)
  72 {
  73         read_unlock_bh(&x25_route_list_lock);
  74 }
  75
  76 static int x25_seq_route_show(struct seq_file *seq, void *v)
  77 {
  78         struct x25_route *rt;
  79
  80         if (v == SEQ_START_TOKEN) {
  81                 seq_puts(seq, "Address          Digits  Device\n");
  82                 goto out;
  83         }
  84
  85         rt = v;
  86         seq_printf(seq, "%-15s  %-6d  %-5s\n",
  87                    rt->address.x25_addr, rt->sigdigits,
  88                    rt->dev ? rt->dev->name : "???");
  89 out:
  90         return 0;
  91 }
  92
  93 static __inline__ struct sock *x25_get_socket_idx(loff_t pos)
  94 {
  95         struct sock *s;
  96         struct hlist_node *node;
  97
  98         sk_for_each(s, node, &x25_list)
  99                 if (!pos--)
 100                         goto found;
 101         s = NULL;
 102 found:
 103         return s;
 104 }
 105
 106 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
 107 {
 108         loff_t l = *pos;
 109
 110         read_lock_bh(&x25_list_lock);
 111         return l ? x25_get_socket_idx(--l) : SEQ_START_TOKEN;
 112 }
 113
 114 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
 115 {
 116         struct sock *s;
 117
 118         ++*pos;
 119         if (v == SEQ_START_TOKEN) {
 120                 s = sk_head(&x25_list);
 121                 goto out;
 122         }
 123         s = sk_next(v);
 124 out:
 125         return s;
 126 }
 127
 128 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
 129 {
 130         read_unlock_bh(&x25_list_lock);
 131 }
 132
 133 static int x25_seq_socket_show(struct seq_file *seq, void *v)
 134 {
 135         struct sock *s;
 136         struct x25_sock *x25;
 137         struct net_device *dev;
 138         const char *devname;
 139
 140         if (v == SEQ_START_TOKEN) {
 141                 seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
 142                                 "va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
 143                 goto out;
 144         }
 145
 146         s = v;
 147         x25 = x25_sk(s);
 148
 149         if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
 150                 devname = "???";
 151         else
 152                 devname = x25->neighbour->dev->name;
 153
 154         seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
 155                         "%3lu %3lu %3lu %5d %5d %ld\n",
 156                    !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
 157                    !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
 158                    devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
 159                    x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
 160                    x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
 161                    atomic_read(&s->sk_wmem_alloc),
 162                    atomic_read(&s->sk_rmem_alloc),
 163                    s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
 164 out:
 165         return 0;
 166 }
 167
 168 static __inline__ struct x25_forward *x25_get_forward_idx(loff_t pos)
 169 {
 170         struct x25_forward *f;
 171         struct list_head *entry;
 172
 173         list_for_each(entry, &x25_forward_list) {
 174                 f = list_entry(entry, struct x25_forward, node);
 175                 if (!pos--)
 176                         goto found;
 177         }
 178
 179         f = NULL;
 180 found:
 181         return f;
 182 }
 183
 184 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
 185 {
 186         loff_t l = *pos;
 187
 188         read_lock_bh(&x25_forward_list_lock);
 189         return l ? x25_get_forward_idx(--l) : SEQ_START_TOKEN;
 190 }
 191
 192 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
 193 {
 194         struct x25_forward *f;
 195
 196         ++*pos;
 197         if (v == SEQ_START_TOKEN) {
 198                 f = NULL;
 199                 if (!list_empty(&x25_forward_list))
 200                         f = list_entry(x25_forward_list.next,
 201                                         struct x25_forward, node);
 202                 goto out;
 203         }
 204         f = v;
 205         if (f->node.next != &x25_forward_list)
 206                 f = list_entry(f->node.next, struct x25_forward, node);
 207         else
 208                 f = NULL;
 209 out:
 210         return f;
 211
 212 }
 213
 214 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
 215 {
 216         read_unlock_bh(&x25_forward_list_lock);
 217 }
 218
 219 static int x25_seq_forward_show(struct seq_file *seq, void *v)
 220 {
 221         struct x25_forward *f;
 222
 223         if (v == SEQ_START_TOKEN) {
 224                 seq_printf(seq, "lci dev1       dev2\n");
 225                 goto out;
 226         }
 227
 228         f = v;
 229
 230         seq_printf(seq, "%d %-10s %-10s\n",
 231                         f->lci, f->dev1->name, f->dev2->name);
 232
 233 out:
 234         return 0;
 235 }
 236
 237 static struct seq_operations x25_seq_route_ops = {
 238         .start  = x25_seq_route_start,
 239         .next   = x25_seq_route_next,
 240         .stop   = x25_seq_route_stop,
 241         .show   = x25_seq_route_show,
 242 };
 243
 244 static struct seq_operations x25_seq_socket_ops = {
 245         .start  = x25_seq_socket_start,
 246         .next   = x25_seq_socket_next,
 247         .stop   = x25_seq_socket_stop,
 248         .show   = x25_seq_socket_show,
 249 };
 250
 251 static struct seq_operations x25_seq_forward_ops = {
 252         .start  = x25_seq_forward_start,
 253         .next   = x25_seq_forward_next,
 254         .stop   = x25_seq_forward_stop,
 255         .show   = x25_seq_forward_show,
 256 };
 257
 258 static int x25_seq_socket_open(struct inode *inode, struct file *file)
 259 {
 260         return seq_open(file, &x25_seq_socket_ops);
 261 }
 262
 263 static int x25_seq_route_open(struct inode *inode, struct file *file)
 264 {
 265         return seq_open(file, &x25_seq_route_ops);
 266 }
 267
 268 static int x25_seq_forward_open(struct inode *inode, struct file *file)
 269 {
 270         return seq_open(file, &x25_seq_forward_ops);
 271 }
 272
 273 static const struct file_operations x25_seq_socket_fops = {
 274         .owner          = THIS_MODULE,
 275         .open           = x25_seq_socket_open,
 276         .read           = seq_read,
 277         .llseek         = seq_lseek,
 278         .release        = seq_release,
 279 };
 280
 281 static const struct file_operations x25_seq_route_fops = {
 282         .owner          = THIS_MODULE,
 283         .open           = x25_seq_route_open,
 284         .read           = seq_read,
 285         .llseek         = seq_lseek,
 286         .release        = seq_release,
 287 };
 288
 289 static struct file_operations x25_seq_forward_fops = {
 290         .owner          = THIS_MODULE,
 291         .open           = x25_seq_forward_open,
 292         .read           = seq_read,
 293         .llseek         = seq_lseek,
 294         .release        = seq_release,
 295 };
 296
 297 static struct proc_dir_entry *x25_proc_dir;
 298
 299 int __init x25_proc_init(void)
 300 {
 301         struct proc_dir_entry *p;
 302         int rc = -ENOMEM;
 303
 304         x25_proc_dir = proc_mkdir("x25", proc_net);
 305         if (!x25_proc_dir)
 306                 goto out;
 307
 308         p = create_proc_entry("route", S_IRUGO, x25_proc_dir);
 309         if (!p)
 310                 goto out_route;
 311         p->proc_fops = &x25_seq_route_fops;
 312
 313         p = create_proc_entry("socket", S_IRUGO, x25_proc_dir);
 314         if (!p)
 315                 goto out_socket;
 316         p->proc_fops = &x25_seq_socket_fops;
 317
 318         p = create_proc_entry("forward", S_IRUGO, x25_proc_dir);
 319         if (!p)
 320                 goto out_forward;
 321         p->proc_fops = &x25_seq_forward_fops;
 322         rc = 0;
 323
 324 out:
 325         return rc;
 326 out_forward:
 327         remove_proc_entry("socket", x25_proc_dir);
 328 out_socket:
 329         remove_proc_entry("route", x25_proc_dir);
 330 out_route:
 331         remove_proc_entry("x25", proc_net);
 332         goto out;
 333 }
 334
 335 void __exit x25_proc_exit(void)
 336 {
 337         remove_proc_entry("forward", x25_proc_dir);
 338         remove_proc_entry("route", x25_proc_dir);
 339         remove_proc_entry("socket", x25_proc_dir);
 340         remove_proc_entry("x25", proc_net);
 341 }
 342
 343 #else /* CONFIG_PROC_FS */
 344
 345 int __init x25_proc_init(void)
 346 {
 347         return 0;
 348 }
 349
 350 void __exit x25_proc_exit(void)
 351 {
 352 }
 353 #endif /* CONFIG_PROC_FS */