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