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 */
rxrpc_init_net(struct net * net)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 */
rxrpc_exit_net(struct net * net)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 };
88