x25_proc.c

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/*
 *  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
 *
 *  This module:
 *      This module is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 *  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;
    struct net_device *dev;
    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 || (dev = x25->neighbour->dev) == NULL)
        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,
};

static int x25_seq_socket_open(struct inode *inode, struct file *file)
{
    return seq_open(file, &x25_seq_socket_ops);
}

static int x25_seq_route_open(struct inode *inode, struct file *file)
{
    return seq_open(file, &x25_seq_route_ops);
}

static int x25_seq_forward_open(struct inode *inode, struct file *file)
{
    return seq_open(file, &x25_seq_forward_ops);
}

static const struct file_operations x25_seq_socket_fops = {
    .owner      = THIS_MODULE,
    .open       = x25_seq_socket_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = seq_release,
};

static const struct file_operations x25_seq_route_fops = {
    .owner      = THIS_MODULE,
    .open       = x25_seq_route_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = seq_release,
};

static const struct file_operations x25_seq_forward_fops = {
    .owner      = THIS_MODULE,
    .open       = x25_seq_forward_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = seq_release,
};

static struct proc_dir_entry *x25_proc_dir;

int __init x25_proc_init(void)
{
    struct proc_dir_entry *p;
    int rc = -ENOMEM;

    x25_proc_dir = proc_mkdir("x25", init_net.proc_net);
    if (!x25_proc_dir)
        goto out;

    p = proc_create("route", S_IRUGO, x25_proc_dir, &x25_seq_route_fops);
    if (!p)
        goto out_route;

    p = proc_create("socket", S_IRUGO, x25_proc_dir, &x25_seq_socket_fops);
    if (!p)
        goto out_socket;

    p = proc_create("forward", S_IRUGO, x25_proc_dir,
            &x25_seq_forward_fops);
    if (!p)
        goto out_forward;
    rc = 0;

out:
    return rc;
out_forward:
    remove_proc_entry("socket", x25_proc_dir);
out_socket:
    remove_proc_entry("route", x25_proc_dir);
out_route:
    remove_proc_entry("x25", init_net.proc_net);
    goto out;
}

void __exit x25_proc_exit(void)
{
    remove_proc_entry("forward", x25_proc_dir);
    remove_proc_entry("route", x25_proc_dir);
    remove_proc_entry("socket", x25_proc_dir);
    remove_proc_entry("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 */