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