linux-imx

/*

 * L2TP subsystem debugfs

 *

 * Copyright (c) 2010 Katalix Systems Ltd

 *

 *  This program 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.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/skbuff.h>

#include <linux/socket.h>

#include <linux/hash.h>

#include <linux/l2tp.h>

#include <linux/in.h>

#include <linux/etherdevice.h>

#include <linux/spinlock.h>

#include <linux/debugfs.h>

#include <net/sock.h>

#include <net/ip.h>

#include <net/icmp.h>

#include <net/udp.h>

#include <net/inet_common.h>

#include <net/inet_hashtables.h>

#include <net/tcp_states.h>

#include <net/protocol.h>

#include <net/xfrm.h>

#include <net/net_namespace.h>

#include <net/netns/generic.h>

​

#include "l2tp_core.h"

​

static struct dentry *rootdir;

static struct dentry *tunnels;

​

struct l2tp_dfs_seq_data {

    struct net *net;

    int tunnel_idx;         /* current tunnel */

    int session_idx;        /* index of session within current tunnel */

    struct l2tp_tunnel *tunnel;

    struct l2tp_session *session;   /* NULL means get next tunnel */

};

​

static void l2tp_dfs_next_tunnel(struct l2tp_dfs_seq_data *pd)

{

    /* Drop reference taken during previous invocation */

    if (pd->tunnel)

        l2tp_tunnel_dec_refcount(pd->tunnel);

​

    pd->tunnel = l2tp_tunnel_get_nth(pd->net, pd->tunnel_idx);

    pd->tunnel_idx++;

}

​

static void l2tp_dfs_next_session(struct l2tp_dfs_seq_data *pd)

{

    /* Drop reference taken during previous invocation */

    if (pd->session)

        l2tp_session_dec_refcount(pd->session);

​