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         const char *devname;
  83
  84         if (v == SEQ_START_TOKEN) {
  85                 seq_printf(seq, "dest_addr  src_addr   dev   lci st vs vr "
  86                                 "va   t  t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
  87                 goto out;
  88         }
  89
  90         s = sk_entry(v);
  91         x25 = x25_sk(s);
  92
  93         if (!x25->neighbour || !x25->neighbour->dev)
  94                 devname = "???";
  95         else
  96                 devname = x25->neighbour->dev->name;
  97
  98         seq_printf(seq, "%-10s %-10s %-5s %3.3X  %d  %d  %d  %d %3lu %3lu "
  99                         "%3lu %3lu %3lu %5d %5d %ld\n",
 100                    !x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
 101                    !x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
 102                    devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
 103                    x25->va, x25_display_timer(s) / HZ, x25->t2  / HZ,
 104                    x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
 105                    sk_wmem_alloc_get(s),
 106                    sk_rmem_alloc_get(s),
 107                    s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
 108 out:
 109         return 0;
 110 }
 111
 112 static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
 113         __acquires(x25_forward_list_lock)
 114 {
 115         read_lock_bh(&x25_forward_list_lock);
 116         return seq_list_start_head(&x25_forward_list, *pos);
 117 }
 118
 119 static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
 120 {
 121         return seq_list_next(v, &x25_forward_list, pos);
 122 }
 123
 124 static void x25_seq_forward_stop(struct seq_file *seq, void *v)
 125         __releases(x25_forward_list_lock)
 126 {
 127         read_unlock_bh(&x25_forward_list_lock);
 128 }
 129
 130 static int x25_seq_forward_show(struct seq_file *seq, void *v)
 131 {
 132         struct x25_forward *f = list_entry(v, struct x25_forward, node);
 133
 134         if (v == &x25_forward_list) {
 135                 seq_printf(seq, "lci dev1       dev2\n");
 136                 goto out;
 137         }
 138
 139         f = v;
 140
 141         seq_printf(seq, "%d %-10s %-10s\n",
 142                         f->lci, f->dev1->name, f->dev2->name);
 143 out:
 144         return 0;
 145 }
 146
 147 static const struct seq_operations x25_seq_route_ops = {
 148         .start  = x25_seq_route_start,
 149         .next   = x25_seq_route_next,
 150         .stop   = x25_seq_route_stop,
 151         .show   = x25_seq_route_show,
 152 };
 153
 154 static const struct seq_operations x25_seq_socket_ops = {
 155         .start  = x25_seq_socket_start,
 156         .next   = x25_seq_socket_next,
 157         .stop   = x25_seq_socket_stop,
 158         .show   = x25_seq_socket_show,
 159 };
 160
 161 static const struct seq_operations x25_seq_forward_ops = {
 162         .start  = x25_seq_forward_start,
 163         .next   = x25_seq_forward_next,
 164         .stop   = x25_seq_forward_stop,
 165         .show   = x25_seq_forward_show,
 166 };
 167
 168 int __init x25_proc_init(void)
 169 {
 170         if (!proc_mkdir("x25", init_net.proc_net))
 171                 return -ENOMEM;
 172
 173         if (!proc_create_seq("x25/route", 0444, init_net.proc_net,
 174                          &x25_seq_route_ops))
 175                 goto out;
 176
 177         if (!proc_create_seq("x25/socket", 0444, init_net.proc_net,
 178                          &x25_seq_socket_ops))
 179                 goto out;
 180
 181         if (!proc_create_seq("x25/forward", 0444, init_net.proc_net,
 182                          &x25_seq_forward_ops))
 183                 goto out;
 184         return 0;
 185
 186 out:
 187         remove_proc_subtree("x25", init_net.proc_net);
 188         return -ENOMEM;
 189 }
 190
 191 void __exit x25_proc_exit(void)
 192 {
 193         remove_proc_subtree("x25", init_net.proc_net);
 194 }
 195
 196 #else /* CONFIG_PROC_FS */
 197
 198 int __init x25_proc_init(void)
 199 {
 200         return 0;
 201 }
 202
 203 void __exit x25_proc_exit(void)
 204 {
 205 }
 206 #endif /* CONFIG_PROC_FS */