mirror of
https://github.com/torvalds/linux.git
synced 2024-12-23 19:31:53 +00:00
3d18cbb7fd
Fix the rxrpc connection expiry timers so that connections for closed
AF_RXRPC sockets get deleted in a more timely fashion, freeing up the
transport UDP port much more quickly.
(1) Replace the delayed work items with work items plus timers so that
timer_reduce() can be used to shorten them and so that the timer
doesn't requeue the work item if the net namespace is dead.
(2) Don't use queue_delayed_work() as that won't alter the timeout if the
timer is already running.
(3) Don't rearm the timers if the network namespace is dead.
Signed-off-by: David Howells <dhowells@redhat.com>
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/* rxrpc network namespace handling.
|
|
*
|
|
* Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/proc_fs.h>
|
|
#include "ar-internal.h"
|
|
|
|
unsigned int rxrpc_net_id;
|
|
|
|
static void rxrpc_client_conn_reap_timeout(struct timer_list *timer)
|
|
{
|
|
struct rxrpc_net *rxnet =
|
|
container_of(timer, struct rxrpc_net, client_conn_reap_timer);
|
|
|
|
if (rxnet->live)
|
|
rxrpc_queue_work(&rxnet->client_conn_reaper);
|
|
}
|
|
|
|
static void rxrpc_service_conn_reap_timeout(struct timer_list *timer)
|
|
{
|
|
struct rxrpc_net *rxnet =
|
|
container_of(timer, struct rxrpc_net, service_conn_reap_timer);
|
|
|
|
if (rxnet->live)
|
|
rxrpc_queue_work(&rxnet->service_conn_reaper);
|
|
}
|
|
|
|
/*
|
|
* Initialise a per-network namespace record.
|
|
*/
|
|
static __net_init int rxrpc_init_net(struct net *net)
|
|
{
|
|
struct rxrpc_net *rxnet = rxrpc_net(net);
|
|
int ret;
|
|
|
|
rxnet->live = true;
|
|
get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
|
|
rxnet->epoch |= RXRPC_RANDOM_EPOCH;
|
|
|
|
INIT_LIST_HEAD(&rxnet->calls);
|
|
rwlock_init(&rxnet->call_lock);
|
|
|
|
INIT_LIST_HEAD(&rxnet->conn_proc_list);
|
|
INIT_LIST_HEAD(&rxnet->service_conns);
|
|
rwlock_init(&rxnet->conn_lock);
|
|
INIT_WORK(&rxnet->service_conn_reaper,
|
|
rxrpc_service_connection_reaper);
|
|
timer_setup(&rxnet->service_conn_reap_timer,
|
|
rxrpc_service_conn_reap_timeout, 0);
|
|
|
|
rxnet->nr_client_conns = 0;
|
|
rxnet->nr_active_client_conns = 0;
|
|
rxnet->kill_all_client_conns = false;
|
|
spin_lock_init(&rxnet->client_conn_cache_lock);
|
|
spin_lock_init(&rxnet->client_conn_discard_lock);
|
|
INIT_LIST_HEAD(&rxnet->waiting_client_conns);
|
|
INIT_LIST_HEAD(&rxnet->active_client_conns);
|
|
INIT_LIST_HEAD(&rxnet->idle_client_conns);
|
|
INIT_WORK(&rxnet->client_conn_reaper,
|
|
rxrpc_discard_expired_client_conns);
|
|
timer_setup(&rxnet->client_conn_reap_timer,
|
|
rxrpc_client_conn_reap_timeout, 0);
|
|
|
|
INIT_LIST_HEAD(&rxnet->local_endpoints);
|
|
mutex_init(&rxnet->local_mutex);
|
|
hash_init(rxnet->peer_hash);
|
|
spin_lock_init(&rxnet->peer_hash_lock);
|
|
|
|
ret = -ENOMEM;
|
|
rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
|
|
if (!rxnet->proc_net)
|
|
goto err_proc;
|
|
|
|
proc_create("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_fops);
|
|
proc_create("conns", 0444, rxnet->proc_net, &rxrpc_connection_seq_fops);
|
|
return 0;
|
|
|
|
err_proc:
|
|
rxnet->live = false;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Clean up a per-network namespace record.
|
|
*/
|
|
static __net_exit void rxrpc_exit_net(struct net *net)
|
|
{
|
|
struct rxrpc_net *rxnet = rxrpc_net(net);
|
|
|
|
rxnet->live = false;
|
|
rxrpc_destroy_all_calls(rxnet);
|
|
rxrpc_destroy_all_connections(rxnet);
|
|
rxrpc_destroy_all_locals(rxnet);
|
|
proc_remove(rxnet->proc_net);
|
|
}
|
|
|
|
struct pernet_operations rxrpc_net_ops = {
|
|
.init = rxrpc_init_net,
|
|
.exit = rxrpc_exit_net,
|
|
.id = &rxrpc_net_id,
|
|
.size = sizeof(struct rxrpc_net),
|
|
};
|