1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* rxrpc network namespace handling.
3 *
4 * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/proc_fs.h>
9 #include "ar-internal.h"
10
11 unsigned int rxrpc_net_id;
12
13 static void rxrpc_service_conn_reap_timeout(struct timer_list *timer)
14 {
15 struct rxrpc_net *rxnet =
16 container_of(timer, struct rxrpc_net, service_conn_reap_timer);
17
18 if (rxnet->live)
19 rxrpc_queue_work(&rxnet->service_conn_reaper);
20 }
21
22 static void rxrpc_peer_keepalive_timeout(struct timer_list *timer)
23 {
24 struct rxrpc_net *rxnet =
25 container_of(timer, struct rxrpc_net, peer_keepalive_timer);
26
27 if (rxnet->live)
28 rxrpc_queue_work(&rxnet->peer_keepalive_work);
29 }
30
31 /*
32 * Initialise a per-network namespace record.
33 */
34 static __net_init int rxrpc_init_net(struct net *net)
35 {
36 struct rxrpc_net *rxnet = rxrpc_net(net);
37 int ret, i;
38
39 rxnet->live = true;
40 get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
41 rxnet->epoch |= RXRPC_RANDOM_EPOCH;
42
43 INIT_LIST_HEAD(&rxnet->calls);
44 spin_lock_init(&rxnet->call_lock);
45 atomic_set(&rxnet->nr_calls, 1);
46
47 atomic_set(&rxnet->nr_conns, 1);
48 INIT_LIST_HEAD(&rxnet->bundle_proc_list);
49 INIT_LIST_HEAD(&rxnet->conn_proc_list);
50 INIT_LIST_HEAD(&rxnet->service_conns);
51 rwlock_init(&rxnet->conn_lock);
52 INIT_WORK(&rxnet->service_conn_reaper,
53 rxrpc_service_connection_reaper);
54 timer_setup(&rxnet->service_conn_reap_timer,
55 rxrpc_service_conn_reap_timeout, 0);
56
57 atomic_set(&rxnet->nr_client_conns, 0);
58
59 INIT_HLIST_HEAD(&rxnet->local_endpoints);
60 mutex_init(&rxnet->local_mutex);
61
62 hash_init(rxnet->peer_hash);
63 spin_lock_init(&rxnet->peer_hash_lock);
64 for (i = 0; i < ARRAY_SIZE(rxnet->peer_keepalive); i++)
65 INIT_LIST_HEAD(&rxnet->peer_keepalive[i]);
66 INIT_LIST_HEAD(&rxnet->peer_keepalive_new);
67 timer_setup(&rxnet->peer_keepalive_timer,
68 rxrpc_peer_keepalive_timeout, 0);
69 INIT_WORK(&rxnet->peer_keepalive_work, rxrpc_peer_keepalive_worker);
70 rxnet->peer_keepalive_base = ktime_get_seconds();
71
72 ret = -ENOMEM;
73 rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
74 if (!rxnet->proc_net)
75 goto err_proc;
76
77 proc_create_net("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_ops,
78 sizeof(struct seq_net_private));
79 proc_create_net("conns", 0444, rxnet->proc_net,
80 &rxrpc_connection_seq_ops,
81 sizeof(struct seq_net_private));
82 proc_create_net("bundles", 0444, rxnet->proc_net,
83 &rxrpc_bundle_seq_ops,
84 sizeof(struct seq_net_private));
85 proc_create_net("peers", 0444, rxnet->proc_net,
86 &rxrpc_peer_seq_ops,
87 sizeof(struct seq_net_private));
88 proc_create_net("locals", 0444, rxnet->proc_net,
89 &rxrpc_local_seq_ops,
90 sizeof(struct seq_net_private));
91 proc_create_net_single_write("stats", S_IFREG | 0644, rxnet->proc_net,
92 rxrpc_stats_show, rxrpc_stats_clear, NULL);
93 return 0;
94
95 err_proc:
96 rxnet->live = false;
97 return ret;
98 }
99
100 /*
101 * Clean up a per-network namespace record.
102 */
103 static __net_exit void rxrpc_exit_net(struct net *net)
104 {
105 struct rxrpc_net *rxnet = rxrpc_net(net);
106
107 rxnet->live = false;
108 del_timer_sync(&rxnet->peer_keepalive_timer);
109 cancel_work_sync(&rxnet->peer_keepalive_work);
110 /* Remove the timer again as the worker may have restarted it. */
111 del_timer_sync(&rxnet->peer_keepalive_timer);
112 rxrpc_destroy_all_calls(rxnet);
113 rxrpc_destroy_all_connections(rxnet);
114 rxrpc_destroy_all_peers(rxnet);
115 rxrpc_destroy_all_locals(rxnet);
116 proc_remove(rxnet->proc_net);
117 }
118
119 struct pernet_operations rxrpc_net_ops = {
120 .init = rxrpc_init_net,
121 .exit = rxrpc_exit_net,
122 .id = &rxrpc_net_id,
123 .size = sizeof(struct rxrpc_net),
124 };
125
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