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
rxrpc_service_conn_reap_timeout(struct timer_list * timer)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
rxrpc_peer_keepalive_timeout(struct timer_list * timer)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 */
rxrpc_init_net(struct net * net)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->conn_proc_list);
49 INIT_LIST_HEAD(&rxnet->service_conns);
50 rwlock_init(&rxnet->conn_lock);
51 INIT_WORK(&rxnet->service_conn_reaper,
52 rxrpc_service_connection_reaper);
53 timer_setup(&rxnet->service_conn_reap_timer,
54 rxrpc_service_conn_reap_timeout, 0);
55
56 atomic_set(&rxnet->nr_client_conns, 0);
57
58 INIT_HLIST_HEAD(&rxnet->local_endpoints);
59 mutex_init(&rxnet->local_mutex);
60
61 hash_init(rxnet->peer_hash);
62 spin_lock_init(&rxnet->peer_hash_lock);
63 for (i = 0; i < ARRAY_SIZE(rxnet->peer_keepalive); i++)
64 INIT_LIST_HEAD(&rxnet->peer_keepalive[i]);
65 INIT_LIST_HEAD(&rxnet->peer_keepalive_new);
66 timer_setup(&rxnet->peer_keepalive_timer,
67 rxrpc_peer_keepalive_timeout, 0);
68 INIT_WORK(&rxnet->peer_keepalive_work, rxrpc_peer_keepalive_worker);
69 rxnet->peer_keepalive_base = ktime_get_seconds();
70
71 ret = -ENOMEM;
72 rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
73 if (!rxnet->proc_net)
74 goto err_proc;
75
76 proc_create_net("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_ops,
77 sizeof(struct seq_net_private));
78 proc_create_net("conns", 0444, rxnet->proc_net,
79 &rxrpc_connection_seq_ops,
80 sizeof(struct seq_net_private));
81 proc_create_net("peers", 0444, rxnet->proc_net,
82 &rxrpc_peer_seq_ops,
83 sizeof(struct seq_net_private));
84 proc_create_net("locals", 0444, rxnet->proc_net,
85 &rxrpc_local_seq_ops,
86 sizeof(struct seq_net_private));
87 proc_create_net_single_write("stats", S_IFREG | 0644, rxnet->proc_net,
88 rxrpc_stats_show, rxrpc_stats_clear, NULL);
89 return 0;
90
91 err_proc:
92 rxnet->live = false;
93 return ret;
94 }
95
96 /*
97 * Clean up a per-network namespace record.
98 */
rxrpc_exit_net(struct net * net)99 static __net_exit void rxrpc_exit_net(struct net *net)
100 {
101 struct rxrpc_net *rxnet = rxrpc_net(net);
102
103 rxnet->live = false;
104 del_timer_sync(&rxnet->peer_keepalive_timer);
105 cancel_work_sync(&rxnet->peer_keepalive_work);
106 /* Remove the timer again as the worker may have restarted it. */
107 del_timer_sync(&rxnet->peer_keepalive_timer);
108 rxrpc_destroy_all_calls(rxnet);
109 rxrpc_destroy_all_connections(rxnet);
110 rxrpc_destroy_all_peers(rxnet);
111 rxrpc_destroy_all_locals(rxnet);
112 proc_remove(rxnet->proc_net);
113 }
114
115 struct pernet_operations rxrpc_net_ops = {
116 .init = rxrpc_init_net,
117 .exit = rxrpc_exit_net,
118 .id = &rxrpc_net_id,
119 .size = sizeof(struct rxrpc_net),
120 };
121