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/config.h>
  21 #include <linux/init.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/seq_file.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 struct seq_operations x25_seq_route_ops = {
 170         .start  = x25_seq_route_start,
 171         .next   = x25_seq_route_next,
 172         .stop   = x25_seq_route_stop,
 173         .show   = x25_seq_route_show,
 174 };
 175
 176 static struct seq_operations x25_seq_socket_ops = {
 177         .start  = x25_seq_socket_start,
 178         .next   = x25_seq_socket_next,
 179         .stop   = x25_seq_socket_stop,
 180         .show   = x25_seq_socket_show,
 181 };
 182
 183 static int x25_seq_socket_open(struct inode *inode, struct file *file)
 184 {
 185         return seq_open(file, &x25_seq_socket_ops);
 186 }
 187
 188 static int x25_seq_route_open(struct inode *inode, struct file *file)
 189 {
 190         return seq_open(file, &x25_seq_route_ops);
 191 }
 192
 193 static struct file_operations x25_seq_socket_fops = {
 194         .owner          = THIS_MODULE,
 195         .open           = x25_seq_socket_open,
 196         .read           = seq_read,
 197         .llseek         = seq_lseek,
 198         .release        = seq_release,
 199 };
 200
 201 static struct file_operations x25_seq_route_fops = {
 202         .owner          = THIS_MODULE,
 203         .open           = x25_seq_route_open,
 204         .read           = seq_read,
 205         .llseek         = seq_lseek,
 206         .release        = seq_release,
 207 };
 208
 209 static struct proc_dir_entry *x25_proc_dir;
 210
 211 int __init x25_proc_init(void)
 212 {
 213         struct proc_dir_entry *p;
 214         int rc = -ENOMEM;
 215
 216         x25_proc_dir = proc_mkdir("x25", proc_net);
 217         if (!x25_proc_dir)
 218                 goto out;
 219
 220         p = create_proc_entry("route", S_IRUGO, x25_proc_dir);
 221         if (!p)
 222                 goto out_route;
 223         p->proc_fops = &x25_seq_route_fops;
 224
 225         p = create_proc_entry("socket", S_IRUGO, x25_proc_dir);
 226         if (!p)
 227                 goto out_socket;
 228         p->proc_fops = &x25_seq_socket_fops;
 229         rc = 0;
 230 out:
 231         return rc;
 232 out_socket:
 233         remove_proc_entry("route", x25_proc_dir);
 234 out_route:
 235         remove_proc_entry("x25", proc_net);
 236         goto out;
 237 }
 238
 239 void __exit x25_proc_exit(void)
 240 {
 241         remove_proc_entry("route", x25_proc_dir);
 242         remove_proc_entry("socket", x25_proc_dir);
 243         remove_proc_entry("x25", proc_net);
 244 }
 245
 246 #else /* CONFIG_PROC_FS */
 247
 248 int __init x25_proc_init(void)
 249 {
 250         return 0;
 251 }
 252
 253 void __exit x25_proc_exit(void)
 254 {
 255 }
 256 #endif /* CONFIG_PROC_FS */