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_client_conn_reap_timeout(struct timer_list * timer)13 static void rxrpc_client_conn_reap_timeout(struct timer_list *timer)
14 {
15 struct rxrpc_net *rxnet =
16 container_of(timer, struct rxrpc_net, client_conn_reap_timer);
17
18 if (rxnet->live)
19 rxrpc_queue_work(&rxnet->client_conn_reaper);
20 }
21
rxrpc_service_conn_reap_timeout(struct timer_list * timer)22 static void rxrpc_service_conn_reap_timeout(struct timer_list *timer)
23 {
24 struct rxrpc_net *rxnet =
25 container_of(timer, struct rxrpc_net, service_conn_reap_timer);
26
27 if (rxnet->live)
28 rxrpc_queue_work(&rxnet->service_conn_reaper);
29 }
30
rxrpc_peer_keepalive_timeout(struct timer_list * timer)31 static void rxrpc_peer_keepalive_timeout(struct timer_list *timer)
32 {
33 struct rxrpc_net *rxnet =
34 container_of(timer, struct rxrpc_net, peer_keepalive_timer);
35
36 if (rxnet->live)
37 rxrpc_queue_work(&rxnet->peer_keepalive_work);
38 }
39
40 /*
41 * Initialise a per-network namespace record.
42 */
rxrpc_init_net(struct net * net)43 static __net_init int rxrpc_init_net(struct net *net)
44 {
45 struct rxrpc_net *rxnet = rxrpc_net(net);
46 int ret, i;
47
48 rxnet->live = true;
49 get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
50 rxnet->epoch |= RXRPC_RANDOM_EPOCH;
51
52 INIT_LIST_HEAD(&rxnet->calls);
53 spin_lock_init(&rxnet->call_lock);
54 atomic_set(&rxnet->nr_calls, 1);
55
56 atomic_set(&rxnet->nr_conns, 1);
57 INIT_LIST_HEAD(&rxnet->conn_proc_list);
58 INIT_LIST_HEAD(&rxnet->service_conns);
59 rwlock_init(&rxnet->conn_lock);
60 INIT_WORK(&rxnet->service_conn_reaper,
61 rxrpc_service_connection_reaper);
62 timer_setup(&rxnet->service_conn_reap_timer,
63 rxrpc_service_conn_reap_timeout, 0);
64
65 atomic_set(&rxnet->nr_client_conns, 0);
66 rxnet->kill_all_client_conns = false;
67 spin_lock_init(&rxnet->client_conn_cache_lock);
68 spin_lock_init(&rxnet->client_conn_discard_lock);
69 INIT_LIST_HEAD(&rxnet->idle_client_conns);
70 INIT_WORK(&rxnet->client_conn_reaper,
71 rxrpc_discard_expired_client_conns);
72 timer_setup(&rxnet->client_conn_reap_timer,
73 rxrpc_client_conn_reap_timeout, 0);
74
75 INIT_HLIST_HEAD(&rxnet->local_endpoints);
76 mutex_init(&rxnet->local_mutex);
77
78 hash_init(rxnet->peer_hash);
79 spin_lock_init(&rxnet->peer_hash_lock);
80 for (i = 0; i < ARRAY_SIZE(rxnet->peer_keepalive); i++)
81 INIT_LIST_HEAD(&rxnet->peer_keepalive[i]);
82 INIT_LIST_HEAD(&rxnet->peer_keepalive_new);
83 timer_setup(&rxnet->peer_keepalive_timer,
84 rxrpc_peer_keepalive_timeout, 0);
85 INIT_WORK(&rxnet->peer_keepalive_work, rxrpc_peer_keepalive_worker);
86 rxnet->peer_keepalive_base = ktime_get_seconds();
87
88 ret = -ENOMEM;
89 rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
90 if (!rxnet->proc_net)
91 goto err_proc;
92
93 proc_create_net("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_ops,
94 sizeof(struct seq_net_private));
95 proc_create_net("conns", 0444, rxnet->proc_net,
96 &rxrpc_connection_seq_ops,
97 sizeof(struct seq_net_private));
98 proc_create_net("peers", 0444, rxnet->proc_net,
99 &rxrpc_peer_seq_ops,
100 sizeof(struct seq_net_private));
101 proc_create_net("locals", 0444, rxnet->proc_net,
102 &rxrpc_local_seq_ops,
103 sizeof(struct seq_net_private));
104 return 0;
105
106 err_proc:
107 rxnet->live = false;
108 return ret;
109 }
110
111 /*
112 * Clean up a per-network namespace record.
113 */
rxrpc_exit_net(struct net * net)114 static __net_exit void rxrpc_exit_net(struct net *net)
115 {
116 struct rxrpc_net *rxnet = rxrpc_net(net);
117
118 rxnet->live = false;
119 del_timer_sync(&rxnet->peer_keepalive_timer);
120 cancel_work_sync(&rxnet->peer_keepalive_work);
121 /* Remove the timer again as the worker may have restarted it. */
122 del_timer_sync(&rxnet->peer_keepalive_timer);
123 rxrpc_destroy_all_calls(rxnet);
124 rxrpc_destroy_all_connections(rxnet);
125 rxrpc_destroy_all_peers(rxnet);
126 rxrpc_destroy_all_locals(rxnet);
127 proc_remove(rxnet->proc_net);
128 }
129
130 struct pernet_operations rxrpc_net_ops = {
131 .init = rxrpc_init_net,
132 .exit = rxrpc_exit_net,
133 .id = &rxrpc_net_id,
134 .size = sizeof(struct rxrpc_net),
135 };
136