net/x25/x25_proc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      X.25 Packet Layer release 002
   4  *
   5  *      This is ALPHA test software. This code may break your machine,
   6  *      randomly fail to work with new releases, misbehave and/or generally
   7  *      screw up. It might even work.
   8  *
   9  *      This code REQUIRES 2.4 with seq_file support
  10  *
  11  *      History
  12  *      2002/10/06      Arnaldo Carvalho de Melo  seq_file support
  13  */
  14
  15 #include <linux/init.h>
  16 #include <linux/proc_fs.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/export.h>
  19 #include <net/net_namespace.h>
  20 #include <net/sock.h>
  21 #include <net/x25.h>
  22
  23 #ifdef CONFIG_PROC_FS
  24
  25 static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
  26         __acquires(x25_route_list_lock)
  27 {
  28         read_lock_bh(&x25_route_list_lock);
  29         return seq_list_start_head(&x25_route_list, *pos);
  30 }
  31
  32 static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
  33 {
  34         return seq_list_next(v, &x25_route_list, pos);
  35 }
  36
  37 static void x25_seq_route_stop(struct seq_file *seq, void *v)
  38         __releases(x25_route_list_lock)
  39 {
  40         read_unlock_bh(&x25_route_list_lock);
  41 }
  42
  43 static int x25_seq_route_show(struct seq_file *seq, void *v)
  44 {
  45         struct x25_route *rt = list_entry(v, struct x25_route, node);
  46
  47         if (v == &x25_route_list) {
  48                 seq_puts(seq, "Address          Digits  Device\n");
  49                 goto out;
  50         }
  51
  52         rt = v;
  53         seq_printf(seq, "%-15s  %-6d  %-5s\n",
  54                    rt->address.x25_addr, rt->sigdigits,
  55                    rt->dev ? rt->dev->name : "???");
  56 out:
  57         return 0;
  58 }
  59
  60 static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
  61         __acquires(x25_list_lock)
  62 {
  63         read_lock_bh(&x25_list_lock);
  64         return seq_hlist_start_head(&x25_list, *pos);
  65 }
  66
  67 static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
  68 {
  69         return seq_hlist_next(v, &x25_list, pos);
  70 }
  71
  72 static void x25_seq_socket_stop(struct seq_file *seq, void *v)
  73         __releases(x25_list_lock)
  74 {
  75         read_unlock_bh(&x25_list_lock);
  76 }
  77
  78 static int x25_seq_socket_show(struct seq_file *seq, void *v)
  79 {
  80         struct sock *s;
  81         struct x25_sock *x25;
  82         struct net_device *dev;
  83         const char *devname;
  84
  85         if (v == SEQ_START_TOKEN) {
  86                 seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
  87                                 "va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
  88                 goto out;
  89         }
  90
  91         s = sk_entry(v);
  92         x25 = x25_sk(s);
  93
  94         if (!x25->neighbour || (dev = x25->neighbour->dev) == NULL)
  95                 devname = "???";
  96         else
  97                 devname = x25->neighbour->dev->name;
  98
  99         seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
 100                         "%3lu %3lu %3lu %5d %5d %ld\n",
 101                    !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
 102                    !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
 103                    devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
 104                    x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
 105                    x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
 106                    sk_wmem_alloc_get(s),
 107                    sk_rmem_alloc_get(s),
 108                    s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
 109 out:
 110         return 0;
 111 }
 112
 113 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
 114         __acquires(x25_forward_list_lock)
 115 {
 116         read_lock_bh(&x25_forward_list_lock);
 117         return seq_list_start_head(&x25_forward_list, *pos);
 118 }
 119
 120 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
 121 {
 122         return seq_list_next(v, &x25_forward_list, pos);
 123 }
 124
 125 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
 126         __releases(x25_forward_list_lock)
 127 {
 128         read_unlock_bh(&x25_forward_list_lock);
 129 }
 130
 131 static int x25_seq_forward_show(struct seq_file *seq, void *v)
 132 {
 133         struct x25_forward *f = list_entry(v, struct x25_forward, node);
 134
 135         if (v == &x25_forward_list) {
 136                 seq_printf(seq, "lci dev1       dev2\n");
 137                 goto out;
 138         }
 139
 140         f = v;
 141
 142         seq_printf(seq, "%d %-10s %-10s\n",
 143                         f->lci, f->dev1->name, f->dev2->name);
 144 out:
 145         return 0;
 146 }
 147
 148 static const struct seq_operations x25_seq_route_ops = {
 149         .start  = x25_seq_route_start,
 150         .next   = x25_seq_route_next,
 151         .stop   = x25_seq_route_stop,
 152         .show   = x25_seq_route_show,
 153 };
 154
 155 static const struct seq_operations x25_seq_socket_ops = {
 156         .start  = x25_seq_socket_start,
 157         .next   = x25_seq_socket_next,
 158         .stop   = x25_seq_socket_stop,
 159         .show   = x25_seq_socket_show,
 160 };
 161
 162 static const struct seq_operations x25_seq_forward_ops = {
 163         .start  = x25_seq_forward_start,
 164         .next   = x25_seq_forward_next,
 165         .stop   = x25_seq_forward_stop,
 166         .show   = x25_seq_forward_show,
 167 };
 168
 169 int __init x25_proc_init(void)
 170 {
 171         if (!proc_mkdir("x25", init_net.proc_net))
 172                 return -ENOMEM;
 173
 174         if (!proc_create_seq("x25/route", 0444, init_net.proc_net,
 175                          &x25_seq_route_ops))
 176                 goto out;
 177
 178         if (!proc_create_seq("x25/socket", 0444, init_net.proc_net,
 179                          &x25_seq_socket_ops))
 180                 goto out;
 181
 182         if (!proc_create_seq("x25/forward", 0444, init_net.proc_net,
 183                          &x25_seq_forward_ops))
 184                 goto out;
 185         return 0;
 186
 187 out:
 188         remove_proc_subtree("x25", init_net.proc_net);
 189         return -ENOMEM;
 190 }
 191
 192 void __exit x25_proc_exit(void)
 193 {
 194         remove_proc_subtree("x25", init_net.proc_net);
 195 }
 196
 197 #else /* CONFIG_PROC_FS */
 198
 199 int __init x25_proc_init(void)
 200 {
 201         return 0;
 202 }
 203
 204 void __exit x25_proc_exit(void)
 205 {
 206 }
 207 #endif /* CONFIG_PROC_FS */