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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* X.25 Packet Layer release 002
*
* This is ALPHA test software. This code may break your machine,
* randomly fail to work with new releases, misbehave and/or generally
* screw up. It might even work.
*
* This code REQUIRES 2.4 with seq_file support
*
* History
* 2002/10/06 Arnaldo Carvalho de Melo seq_file support
*/
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/export.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/x25.h>
#ifdef CONFIG_PROC_FS
static void *x25_seq_route_start(struct seq_file *seq, loff_t *pos)
__acquires(x25_route_list_lock)
{
read_lock_bh(&x25_route_list_lock);
return seq_list_start_head(&x25_route_list, *pos);
}
static void *x25_seq_route_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_list_next(v, &x25_route_list, pos);
}
static void x25_seq_route_stop(struct seq_file *seq, void *v)
__releases(x25_route_list_lock)
{
read_unlock_bh(&x25_route_list_lock);
}
static int x25_seq_route_show(struct seq_file *seq, void *v)
{
struct x25_route *rt = list_entry(v, struct x25_route, node);
if (v == &x25_route_list) {
seq_puts(seq, "Address Digits Device\n");
goto out;
}
rt = v;
seq_printf(seq, "%-15s %-6d %-5s\n",
rt->address.x25_addr, rt->sigdigits,
rt->dev ? rt->dev->name : "???");
out:
return 0;
}
static void *x25_seq_socket_start(struct seq_file *seq, loff_t *pos)
__acquires(x25_list_lock)
{
read_lock_bh(&x25_list_lock);
return seq_hlist_start_head(&x25_list, *pos);
}
static void *x25_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_hlist_next(v, &x25_list, pos);
}
static void x25_seq_socket_stop(struct seq_file *seq, void *v)
__releases(x25_list_lock)
{
read_unlock_bh(&x25_list_lock);
}
static int x25_seq_socket_show(struct seq_file *seq, void *v)
{
struct sock *s;
struct x25_sock *x25;
const char *devname;
if (v == SEQ_START_TOKEN) {
seq_printf(seq, "dest_addr src_addr dev lci st vs vr "
"va t t2 t21 t22 t23 Snd-Q Rcv-Q inode\n");
goto out;
}
s = sk_entry(v);
x25 = x25_sk(s);
if (!x25->neighbour || !x25->neighbour->dev)
devname = "???";
else
devname = x25->neighbour->dev->name;
seq_printf(seq, "%-10s %-10s %-5s %3.3X %d %d %d %d %3lu %3lu "
"%3lu %3lu %3lu %5d %5d %ld\n",
!x25->dest_addr.x25_addr[0] ? "*" : x25->dest_addr.x25_addr,
!x25->source_addr.x25_addr[0] ? "*" : x25->source_addr.x25_addr,
devname, x25->lci & 0x0FFF, x25->state, x25->vs, x25->vr,
x25->va, x25_display_timer(s) / HZ, x25->t2 / HZ,
x25->t21 / HZ, x25->t22 / HZ, x25->t23 / HZ,
sk_wmem_alloc_get(s),
sk_rmem_alloc_get(s),
s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
out:
return 0;
}
static void *x25_seq_forward_start(struct seq_file *seq, loff_t *pos)
__acquires(x25_forward_list_lock)
{
read_lock_bh(&x25_forward_list_lock);
return seq_list_start_head(&x25_forward_list, *pos);
}
static void *x25_seq_forward_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_list_next(v, &x25_forward_list, pos);
}
static void x25_seq_forward_stop(struct seq_file *seq, void *v)
__releases(x25_forward_list_lock)
{
read_unlock_bh(&x25_forward_list_lock);
}
static int x25_seq_forward_show(struct seq_file *seq, void *v)
{
struct x25_forward *f = list_entry(v, struct x25_forward, node);
if (v == &x25_forward_list) {
seq_printf(seq, "lci dev1 dev2\n");
goto out;
}
f = v;
seq_printf(seq, "%d %-10s %-10s\n",
f->lci, f->dev1->name, f->dev2->name);
out:
return 0;
}
static const struct seq_operations x25_seq_route_ops = {
.start = x25_seq_route_start,
.next = x25_seq_route_next,
.stop = x25_seq_route_stop,
.show = x25_seq_route_show,
};
static const struct seq_operations x25_seq_socket_ops = {
.start = x25_seq_socket_start,
.next = x25_seq_socket_next,
.stop = x25_seq_socket_stop,
.show = x25_seq_socket_show,
};
static const struct seq_operations x25_seq_forward_ops = {
.start = x25_seq_forward_start,
.next = x25_seq_forward_next,
.stop = x25_seq_forward_stop,
.show = x25_seq_forward_show,
};
int __init x25_proc_init(void)
{
if (!proc_mkdir("x25", init_net.proc_net))
return -ENOMEM;
if (!proc_create_seq("x25/route", 0444, init_net.proc_net,
&x25_seq_route_ops))
goto out;
if (!proc_create_seq("x25/socket", 0444, init_net.proc_net,
&x25_seq_socket_ops))
goto out;
if (!proc_create_seq("x25/forward", 0444, init_net.proc_net,
&x25_seq_forward_ops))
goto out;
return 0;
out:
remove_proc_subtree("x25", init_net.proc_net);
return -ENOMEM;
}
void __exit x25_proc_exit(void)
{
remove_proc_subtree("x25", init_net.proc_net);
}
#else /* CONFIG_PROC_FS */
int __init x25_proc_init(void)
{
return 0;
}
void __exit x25_proc_exit(void)
{
}
#endif /* CONFIG_PROC_FS */
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