br.c

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/*
 *  Generic parts
 *  Linux ethernet bridge
 *
 *  Authors:
 *  Lennert Buytenhek       <[email protected]>
 *
 *  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.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/llc.h>
#include <net/llc.h>
#include <net/stp.h>

#include "br_private.h"

static const struct stp_proto br_stp_proto = {
    .rcv    = br_stp_rcv,
};

static struct pernet_operations br_net_ops = {
    .exit   = br_net_exit,
};

static int __init br_init(void)
{
    int err;

    err = stp_proto_register(&br_stp_proto);
    if (err < 0) {
        pr_err("bridge: can't register sap for STP\n");
        return err;
    }

    err = br_fdb_init();
    if (err)
        goto err_out;

    err = register_pernet_subsys(&br_net_ops);
    if (err)
        goto err_out1;

    err = br_netfilter_init();
    if (err)
        goto err_out2;

    err = register_netdevice_notifier(&br_device_notifier);
    if (err)
        goto err_out3;

    err = br_netlink_init();
    if (err)
        goto err_out4;

    brioctl_set(br_ioctl_deviceless_stub);

#if IS_ENABLED(CONFIG_ATM_LANE)
    br_fdb_test_addr_hook = br_fdb_test_addr;
#endif

    return 0;
err_out4:
    unregister_netdevice_notifier(&br_device_notifier);
err_out3:
    br_netfilter_fini();
err_out2:
    unregister_pernet_subsys(&br_net_ops);
err_out1:
    br_fdb_fini();
err_out:
    stp_proto_unregister(&br_stp_proto);
    return err;
}

static void __exit br_deinit(void)
{
    stp_proto_unregister(&br_stp_proto);

    br_netlink_fini();
    unregister_netdevice_notifier(&br_device_notifier);
    brioctl_set(NULL);

    unregister_pernet_subsys(&br_net_ops);

    rcu_barrier(); /* Wait for completion of call_rcu()'s */

    br_netfilter_fini();
#if IS_ENABLED(CONFIG_ATM_LANE)
    br_fdb_test_addr_hook = NULL;
#endif

    br_fdb_fini();
}

module_init(br_init)
module_exit(br_deinit)
MODULE_LICENSE("GPL");
MODULE_VERSION(BR_VERSION);
MODULE_ALIAS_RTNL_LINK("bridge");