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 */ 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 get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch)); 26 rxnet->epoch |= RXRPC_RANDOM_EPOCH; 27 28 INIT_LIST_HEAD(&rxnet->calls); 29 rwlock_init(&rxnet->call_lock); 30 31 INIT_LIST_HEAD(&rxnet->conn_proc_list); 32 INIT_LIST_HEAD(&rxnet->service_conns); 33 rwlock_init(&rxnet->conn_lock); 34 INIT_DELAYED_WORK(&rxnet->service_conn_reaper, 35 rxrpc_service_connection_reaper); 36 37 rxnet->nr_client_conns = 0; 38 rxnet->nr_active_client_conns = 0; 39 rxnet->kill_all_client_conns = false; 40 spin_lock_init(&rxnet->client_conn_cache_lock); 41 spin_lock_init(&rxnet->client_conn_discard_lock); 42 INIT_LIST_HEAD(&rxnet->waiting_client_conns); 43 INIT_LIST_HEAD(&rxnet->active_client_conns); 44 INIT_LIST_HEAD(&rxnet->idle_client_conns); 45 INIT_DELAYED_WORK(&rxnet->client_conn_reaper, 46 rxrpc_discard_expired_client_conns); 47 48 INIT_LIST_HEAD(&rxnet->local_endpoints); 49 mutex_init(&rxnet->local_mutex); 50 hash_init(rxnet->peer_hash); 51 spin_lock_init(&rxnet->peer_hash_lock); 52 53 ret = -ENOMEM; 54 rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net); 55 if (!rxnet->proc_net) 56 goto err_proc; 57 58 proc_create("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_fops); 59 proc_create("conns", 0444, rxnet->proc_net, &rxrpc_connection_seq_fops); 60 return 0; 61 62 err_proc: 63 return ret; 64 } 65 66 /* 67 * Clean up a per-network namespace record. 68 */ 69 static __net_exit void rxrpc_exit_net(struct net *net) 70 { 71 struct rxrpc_net *rxnet = rxrpc_net(net); 72 73 rxrpc_destroy_all_calls(rxnet); 74 rxrpc_destroy_all_connections(rxnet); 75 rxrpc_destroy_all_locals(rxnet); 76 proc_remove(rxnet->proc_net); 77 } 78 79 struct pernet_operations rxrpc_net_ops = { 80 .init = rxrpc_init_net, 81 .exit = rxrpc_exit_net, 82 .id = &rxrpc_net_id, 83 .size = sizeof(struct rxrpc_net), 84 }; 85