net/rxrpc/net_ns.c

Source file repositories/reference/linux-study-clean/net/rxrpc/net_ns.c

File Facts

System
Linux kernel
Corpus path
net/rxrpc/net_ns.c
Extension
.c
Size
3605 bytes
Lines
125
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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->bundle_proc_list);
	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("bundles", 0444, rxnet->proc_net,
			&rxrpc_bundle_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));

Annotation

Implementation Notes