[linux-block.git] / net / rxrpc / net_ns.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* rxrpc network namespace handling.
 *
 * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */

#include <linux/proc_fs.h>
#include "ar-internal.h"

unsigned int rxrpc_net_id;

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);
	spin_lock_init(&rxnet->call_lock);
	atomic_set(&rxnet->nr_calls, 1);

	atomic_set(&rxnet->nr_conns, 1);
	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);

	atomic_set(&rxnet->nr_client_conns, 0);

	INIT_HLIST_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_LIST_HEAD(&rxnet->peer_keepalive[i]);
	INIT_LIST_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_get_seconds();

	ret = -ENOMEM;
	rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
	if (!rxnet->proc_net)
		goto err_proc;

	proc_create_net("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_ops,
			sizeof(struct seq_net_private));
	proc_create_net("conns", 0444, rxnet->proc_net,
			&rxrpc_connection_seq_ops,
			sizeof(struct seq_net_private));
	proc_create_net("peers", 0444, rxnet->proc_net,
			&rxrpc_peer_seq_ops,
			sizeof(struct seq_net_private));
	proc_create_net("locals", 0444, rxnet->proc_net,
			&rxrpc_local_seq_ops,
			sizeof(struct seq_net_private));
	proc_create_net_single_write("stats", S_IFREG | 0644, rxnet->proc_net,
				     rxrpc_stats_show, rxrpc_stats_clear, NULL);
	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);
	/* Remove the timer again as the worker may have restarted it. */
	del_timer_sync(&rxnet->peer_keepalive_timer);
	rxrpc_destroy_all_calls(rxnet);
	rxrpc_destroy_all_connections(rxnet);
	rxrpc_destroy_all_peers(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),
};
Commit	Line	Data
b4d0d230	1	// SPDX-License-Identifier: GPL-2.0-or-later
2baec2c3 DH	2	/* rxrpc network namespace handling.
	3	*
	4	* Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
	5	* Written by David Howells (dhowells@redhat.com)
2baec2c3 DH	6	*/
	7
	8	#include <linux/proc_fs.h>
	9	#include "ar-internal.h"
	10
	11	unsigned int rxrpc_net_id;
	12
3d18cbb7 DH	13	static void rxrpc_service_conn_reap_timeout(struct timer_list *timer)
	14	{
	15	struct rxrpc_net *rxnet =
	16	container_of(timer, struct rxrpc_net, service_conn_reap_timer);
	17
	18	if (rxnet->live)
	19	rxrpc_queue_work(&rxnet->service_conn_reaper);
	20	}
	21
ace45bec DH	22	static void rxrpc_peer_keepalive_timeout(struct timer_list *timer)
	23	{
	24	struct rxrpc_net *rxnet =
	25	container_of(timer, struct rxrpc_net, peer_keepalive_timer);
	26
	27	if (rxnet->live)
	28	rxrpc_queue_work(&rxnet->peer_keepalive_work);
	29	}
	30
2baec2c3 DH	31	/*
	32	* Initialise a per-network namespace record.
	33	*/
	34	static __net_init int rxrpc_init_net(struct net *net)
	35	{
	36	struct rxrpc_net *rxnet = rxrpc_net(net);
ace45bec	37	int ret, i;
2baec2c3	38
f859ab61	39	rxnet->live = true;
2baec2c3 DH	40	get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
	41	rxnet->epoch \|= RXRPC_RANDOM_EPOCH;
	42
	43	INIT_LIST_HEAD(&rxnet->calls);
ad25f5cb	44	spin_lock_init(&rxnet->call_lock);
d3be4d24	45	atomic_set(&rxnet->nr_calls, 1);
2baec2c3	46
31f5f9a1	47	atomic_set(&rxnet->nr_conns, 1);
2baec2c3 DH	48	INIT_LIST_HEAD(&rxnet->conn_proc_list);
	49	INIT_LIST_HEAD(&rxnet->service_conns);
	50	rwlock_init(&rxnet->conn_lock);
3d18cbb7 DH	51	INIT_WORK(&rxnet->service_conn_reaper,
	52	rxrpc_service_connection_reaper);
	53	timer_setup(&rxnet->service_conn_reap_timer,
	54	rxrpc_service_conn_reap_timeout, 0);
2baec2c3	55
245500d8	56	atomic_set(&rxnet->nr_client_conns, 0);
2baec2c3	57
33912c26	58	INIT_HLIST_HEAD(&rxnet->local_endpoints);
2baec2c3	59	mutex_init(&rxnet->local_mutex);
ace45bec	60
2baec2c3 DH	61	hash_init(rxnet->peer_hash);
2baec2c3 DH	62	spin_lock_init(&rxnet->peer_hash_lock);
ace45bec	63	for (i = 0; i < ARRAY_SIZE(rxnet->peer_keepalive); i++)
330bdcfa DH	64	INIT_LIST_HEAD(&rxnet->peer_keepalive[i]);
330bdcfa DH	65	INIT_LIST_HEAD(&rxnet->peer_keepalive_new);
ace45bec DH	66	timer_setup(&rxnet->peer_keepalive_timer,
	67	rxrpc_peer_keepalive_timeout, 0);
	68	INIT_WORK(&rxnet->peer_keepalive_work, rxrpc_peer_keepalive_worker);
330bdcfa	69	rxnet->peer_keepalive_base = ktime_get_seconds();
2baec2c3 DH	70
	71	ret = -ENOMEM;
	72	rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
	73	if (!rxnet->proc_net)
	74	goto err_proc;
	75
c3506372 CH	76	proc_create_net("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_ops,
	77	sizeof(struct seq_net_private));
	78	proc_create_net("conns", 0444, rxnet->proc_net,
	79	&rxrpc_connection_seq_ops,
	80	sizeof(struct seq_net_private));
bc0e7cf4 DH	81	proc_create_net("peers", 0444, rxnet->proc_net,
	82	&rxrpc_peer_seq_ops,
	83	sizeof(struct seq_net_private));
33912c26 DH	84	proc_create_net("locals", 0444, rxnet->proc_net,
	85	&rxrpc_local_seq_ops,
	86	sizeof(struct seq_net_private));
b0154246 DH	87	proc_create_net_single_write("stats", S_IFREG \| 0644, rxnet->proc_net,
b0154246 DH	88	rxrpc_stats_show, rxrpc_stats_clear, NULL);
2baec2c3 DH	89	return 0;
2baec2c3 DH	90
2baec2c3	91	err_proc:
f859ab61	92	rxnet->live = false;
2baec2c3 DH	93	return ret;
	94	}
	95
	96	/*
	97	* Clean up a per-network namespace record.
	98	*/
	99	static __net_exit void rxrpc_exit_net(struct net *net)
	100	{
	101	struct rxrpc_net *rxnet = rxrpc_net(net);
	102
f859ab61	103	rxnet->live = false;
ee3b0826	104	del_timer_sync(&rxnet->peer_keepalive_timer);
ace45bec	105	cancel_work_sync(&rxnet->peer_keepalive_work);
ee3b0826	106	/* Remove the timer again as the worker may have restarted it. */
1946014c	107	del_timer_sync(&rxnet->peer_keepalive_timer);
2baec2c3 DH	108	rxrpc_destroy_all_calls(rxnet);
2baec2c3 DH	109	rxrpc_destroy_all_connections(rxnet);
17226f12	110	rxrpc_destroy_all_peers(rxnet);
2baec2c3 DH	111	rxrpc_destroy_all_locals(rxnet);
	112	proc_remove(rxnet->proc_net);
	113	}
	114
	115	struct pernet_operations rxrpc_net_ops = {
	116	.init = rxrpc_init_net,
	117	.exit = rxrpc_exit_net,
	118	.id = &rxrpc_net_id,
	119	.size = sizeof(struct rxrpc_net),
	120	};