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2baec2c3 DH |
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 | ||
3d18cbb7 DH |
17 | static void rxrpc_client_conn_reap_timeout(struct timer_list *timer) |
18 | { | |
19 | struct rxrpc_net *rxnet = | |
20 | container_of(timer, struct rxrpc_net, client_conn_reap_timer); | |
21 | ||
22 | if (rxnet->live) | |
23 | rxrpc_queue_work(&rxnet->client_conn_reaper); | |
24 | } | |
25 | ||
26 | static void rxrpc_service_conn_reap_timeout(struct timer_list *timer) | |
27 | { | |
28 | struct rxrpc_net *rxnet = | |
29 | container_of(timer, struct rxrpc_net, service_conn_reap_timer); | |
30 | ||
31 | if (rxnet->live) | |
32 | rxrpc_queue_work(&rxnet->service_conn_reaper); | |
33 | } | |
34 | ||
2baec2c3 DH |
35 | /* |
36 | * Initialise a per-network namespace record. | |
37 | */ | |
38 | static __net_init int rxrpc_init_net(struct net *net) | |
39 | { | |
40 | struct rxrpc_net *rxnet = rxrpc_net(net); | |
41 | int ret; | |
42 | ||
f859ab61 | 43 | rxnet->live = true; |
2baec2c3 DH |
44 | get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch)); |
45 | rxnet->epoch |= RXRPC_RANDOM_EPOCH; | |
46 | ||
47 | INIT_LIST_HEAD(&rxnet->calls); | |
48 | rwlock_init(&rxnet->call_lock); | |
49 | ||
50 | INIT_LIST_HEAD(&rxnet->conn_proc_list); | |
51 | INIT_LIST_HEAD(&rxnet->service_conns); | |
52 | rwlock_init(&rxnet->conn_lock); | |
3d18cbb7 DH |
53 | INIT_WORK(&rxnet->service_conn_reaper, |
54 | rxrpc_service_connection_reaper); | |
55 | timer_setup(&rxnet->service_conn_reap_timer, | |
56 | rxrpc_service_conn_reap_timeout, 0); | |
2baec2c3 DH |
57 | |
58 | rxnet->nr_client_conns = 0; | |
59 | rxnet->nr_active_client_conns = 0; | |
60 | rxnet->kill_all_client_conns = false; | |
61 | spin_lock_init(&rxnet->client_conn_cache_lock); | |
62 | spin_lock_init(&rxnet->client_conn_discard_lock); | |
63 | INIT_LIST_HEAD(&rxnet->waiting_client_conns); | |
64 | INIT_LIST_HEAD(&rxnet->active_client_conns); | |
65 | INIT_LIST_HEAD(&rxnet->idle_client_conns); | |
3d18cbb7 DH |
66 | INIT_WORK(&rxnet->client_conn_reaper, |
67 | rxrpc_discard_expired_client_conns); | |
68 | timer_setup(&rxnet->client_conn_reap_timer, | |
69 | rxrpc_client_conn_reap_timeout, 0); | |
2baec2c3 DH |
70 | |
71 | INIT_LIST_HEAD(&rxnet->local_endpoints); | |
72 | mutex_init(&rxnet->local_mutex); | |
73 | hash_init(rxnet->peer_hash); | |
74 | spin_lock_init(&rxnet->peer_hash_lock); | |
75 | ||
76 | ret = -ENOMEM; | |
77 | rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net); | |
78 | if (!rxnet->proc_net) | |
79 | goto err_proc; | |
80 | ||
81 | proc_create("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_fops); | |
82 | proc_create("conns", 0444, rxnet->proc_net, &rxrpc_connection_seq_fops); | |
83 | return 0; | |
84 | ||
2baec2c3 | 85 | err_proc: |
f859ab61 | 86 | rxnet->live = false; |
2baec2c3 DH |
87 | return ret; |
88 | } | |
89 | ||
90 | /* | |
91 | * Clean up a per-network namespace record. | |
92 | */ | |
93 | static __net_exit void rxrpc_exit_net(struct net *net) | |
94 | { | |
95 | struct rxrpc_net *rxnet = rxrpc_net(net); | |
96 | ||
f859ab61 | 97 | rxnet->live = false; |
2baec2c3 DH |
98 | rxrpc_destroy_all_calls(rxnet); |
99 | rxrpc_destroy_all_connections(rxnet); | |
100 | rxrpc_destroy_all_locals(rxnet); | |
101 | proc_remove(rxnet->proc_net); | |
102 | } | |
103 | ||
104 | struct pernet_operations rxrpc_net_ops = { | |
105 | .init = rxrpc_init_net, | |
106 | .exit = rxrpc_exit_net, | |
107 | .id = &rxrpc_net_id, | |
108 | .size = sizeof(struct rxrpc_net), | |
109 | }; |