/* rxrpc network namespace handling.
   *
   * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public Licence
   * as published by the Free Software Foundation; either version
   * 2 of the Licence, or (at your option) any later version.
   */
  
  #include <linux/proc_fs.h>
  #include "ar-internal.h"
  
  unsigned int rxrpc_net_id;
  
  /*
   * Initialise a per-network namespace record.
   */
  static __net_init int rxrpc_init_net(struct net *net)
  {
  	struct rxrpc_net *rxnet = rxrpc_net(net);
  	int ret;

  	rxnet->live = true;

  	get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
  	rxnet->epoch |= RXRPC_RANDOM_EPOCH;
  
  	INIT_LIST_HEAD(&rxnet->calls);
  	rwlock_init(&rxnet->call_lock);
  
  	INIT_LIST_HEAD(&rxnet->conn_proc_list);
  	INIT_LIST_HEAD(&rxnet->service_conns);
  	rwlock_init(&rxnet->conn_lock);
  	INIT_DELAYED_WORK(&rxnet->service_conn_reaper,
  			  rxrpc_service_connection_reaper);
  
  	rxnet->nr_client_conns = 0;
  	rxnet->nr_active_client_conns = 0;
  	rxnet->kill_all_client_conns = false;
  	spin_lock_init(&rxnet->client_conn_cache_lock);
  	spin_lock_init(&rxnet->client_conn_discard_lock);
  	INIT_LIST_HEAD(&rxnet->waiting_client_conns);
  	INIT_LIST_HEAD(&rxnet->active_client_conns);
  	INIT_LIST_HEAD(&rxnet->idle_client_conns);
  	INIT_DELAYED_WORK(&rxnet->client_conn_reaper,
  			  rxrpc_discard_expired_client_conns);
  
  	INIT_LIST_HEAD(&rxnet->local_endpoints);
  	mutex_init(&rxnet->local_mutex);
  	hash_init(rxnet->peer_hash);
  	spin_lock_init(&rxnet->peer_hash_lock);
  
  	ret = -ENOMEM;
  	rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
  	if (!rxnet->proc_net)
  		goto err_proc;
  
  	proc_create("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_fops);
  	proc_create("conns", 0444, rxnet->proc_net, &rxrpc_connection_seq_fops);
  	return 0;

  err_proc:

  	rxnet->live = false;

  	return ret;
  }
  
  /*
   * Clean up a per-network namespace record.
   */
  static __net_exit void rxrpc_exit_net(struct net *net)
  {
  	struct rxrpc_net *rxnet = rxrpc_net(net);

  	rxnet->live = false;

  	rxrpc_destroy_all_calls(rxnet);
  	rxrpc_destroy_all_connections(rxnet);
  	rxrpc_destroy_all_locals(rxnet);
  	proc_remove(rxnet->proc_net);
  }
  
  struct pernet_operations rxrpc_net_ops = {
  	.init	= rxrpc_init_net,
  	.exit	= rxrpc_exit_net,
  	.id	= &rxrpc_net_id,
  	.size	= sizeof(struct rxrpc_net),
  };