net/rxrpc/net_ns.c

   1 /* rxrpc network namespace handling.
   2  *
   3  * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11
  12 #include <linux/proc_fs.h>
  13 #include "ar-internal.h"
  14
  15 unsigned int rxrpc_net_id;
  16
  17 /*
  18  * Initialise a per-network namespace record.
  19  */
  20 static __net_init int rxrpc_init_net(struct net *net)
  21 {
  22         struct rxrpc_net *rxnet = rxrpc_net(net);
  23         int ret;
  24
  25         rxnet->live = true;
  26         get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
  27         rxnet->epoch |= RXRPC_RANDOM_EPOCH;
  28
  29         INIT_LIST_HEAD(&rxnet->calls);
  30         rwlock_init(&rxnet->call_lock);
  31
  32         INIT_LIST_HEAD(&rxnet->conn_proc_list);
  33         INIT_LIST_HEAD(&rxnet->service_conns);
  34         rwlock_init(&rxnet->conn_lock);
  35         INIT_DELAYED_WORK(&rxnet->service_conn_reaper,
  36                           rxrpc_service_connection_reaper);
  37
  38         rxnet->nr_client_conns = 0;
  39         rxnet->nr_active_client_conns = 0;
  40         rxnet->kill_all_client_conns = false;
  41         spin_lock_init(&rxnet->client_conn_cache_lock);
  42         spin_lock_init(&rxnet->client_conn_discard_lock);
  43         INIT_LIST_HEAD(&rxnet->waiting_client_conns);
  44         INIT_LIST_HEAD(&rxnet->active_client_conns);
  45         INIT_LIST_HEAD(&rxnet->idle_client_conns);
  46         INIT_DELAYED_WORK(&rxnet->client_conn_reaper,
  47                           rxrpc_discard_expired_client_conns);
  48
  49         INIT_LIST_HEAD(&rxnet->local_endpoints);
  50         mutex_init(&rxnet->local_mutex);
  51         hash_init(rxnet->peer_hash);
  52         spin_lock_init(&rxnet->peer_hash_lock);
  53
  54         ret = -ENOMEM;
  55         rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
  56         if (!rxnet->proc_net)
  57                 goto err_proc;
  58
  59         proc_create("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_fops);
  60         proc_create("conns", 0444, rxnet->proc_net, &rxrpc_connection_seq_fops);
  61         return 0;
  62
  63 err_proc:
  64         rxnet->live = false;
  65         return ret;
  66 }
  67
  68 /*
  69  * Clean up a per-network namespace record.
  70  */
  71 static __net_exit void rxrpc_exit_net(struct net *net)
  72 {
  73         struct rxrpc_net *rxnet = rxrpc_net(net);
  74
  75         rxnet->live = false;
  76         rxrpc_destroy_all_calls(rxnet);
  77         rxrpc_destroy_all_connections(rxnet);
  78         rxrpc_destroy_all_locals(rxnet);
  79         proc_remove(rxnet->proc_net);
  80 }
  81
  82 struct pernet_operations rxrpc_net_ops = {
  83         .init   = rxrpc_init_net,
  84         .exit   = rxrpc_exit_net,
  85         .id     = &rxrpc_net_id,
  86         .size   = sizeof(struct rxrpc_net),
  87 };