mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-01-13 16:40:22 +00:00
ace45bec6d
Fix the firewall route keepalive part of AF_RXRPC which is currently function incorrectly by replying to VERSION REPLY packets from the server with VERSION REQUEST packets. Instead, send VERSION REPLY packets to the peers of service connections to act as keep-alives 20s after the latest packet was transmitted to that peer. Also, just discard VERSION REPLY packets rather than replying to them. Signed-off-by: David Howells <dhowells@redhat.com>
129 lines
3.6 KiB
C
129 lines
3.6 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);
|
|
}
|
|
|
|
static void rxrpc_peer_keepalive_timeout(struct timer_list *timer)
|
|
{
|
|
struct rxrpc_net *rxnet =
|
|
container_of(timer, struct rxrpc_net, peer_keepalive_timer);
|
|
|
|
if (rxnet->live)
|
|
rxrpc_queue_work(&rxnet->peer_keepalive_work);
|
|
}
|
|
|
|
/*
|
|
* 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, i;
|
|
|
|
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);
|
|
for (i = 0; i < ARRAY_SIZE(rxnet->peer_keepalive); i++)
|
|
INIT_HLIST_HEAD(&rxnet->peer_keepalive[i]);
|
|
INIT_HLIST_HEAD(&rxnet->peer_keepalive_new);
|
|
timer_setup(&rxnet->peer_keepalive_timer,
|
|
rxrpc_peer_keepalive_timeout, 0);
|
|
INIT_WORK(&rxnet->peer_keepalive_work, rxrpc_peer_keepalive_worker);
|
|
rxnet->peer_keepalive_base = ktime_add(ktime_get_real(), NSEC_PER_SEC);
|
|
|
|
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;
|
|
del_timer_sync(&rxnet->peer_keepalive_timer);
|
|
cancel_work_sync(&rxnet->peer_keepalive_work);
|
|
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),
|
|
};
|