ovpnpriv.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*  OpenVPN data channel offload
 3 *
 4 *  Copyright (C) 2019-2025 OpenVPN, Inc.
 5 *
 6 *  Author:	James Yonan <james@openvpn.net>
 7 *		Antonio Quartulli <antonio@openvpn.net>
 8 */
 9
10#ifndef _NET_OVPN_OVPNSTRUCT_H_
11#define _NET_OVPN_OVPNSTRUCT_H_
12
13#include <linux/workqueue.h>
14#include <net/gro_cells.h>
15#include <uapi/linux/if_link.h>
16#include <uapi/linux/ovpn.h>
17
18/**
19 * struct ovpn_peer_collection - container of peers for MultiPeer mode
20 * @by_id: table of peers index by ID
21 * @by_vpn_addr4: table of peers indexed by VPN IPv4 address (items can be
22 *		  rehashed on the fly due to peer IP change)
23 * @by_vpn_addr6: table of peers indexed by VPN IPv6 address (items can be
24 *		  rehashed on the fly due to peer IP change)
25 * @by_transp_addr: table of peers indexed by transport address (items can be
26 *		    rehashed on the fly due to peer IP change)
27 */
28struct ovpn_peer_collection {
29	DECLARE_HASHTABLE(by_id, 12);
30	struct hlist_nulls_head by_vpn_addr4[1 << 12];
31	struct hlist_nulls_head by_vpn_addr6[1 << 12];
32	struct hlist_nulls_head by_transp_addr[1 << 12];
33};
34
35/**
36 * struct ovpn_priv - per ovpn interface state
37 * @dev: the actual netdev representing the tunnel
38 * @mode: device operation mode (i.e. p2p, mp, ..)
39 * @lock: protect this object
40 * @peers: data structures holding multi-peer references
41 * @peer: in P2P mode, this is the only remote peer
42 * @gro_cells: pointer to the Generic Receive Offload cell
43 * @keepalive_work: struct used to schedule keepalive periodic job
44 */
45struct ovpn_priv {
46	struct net_device *dev;
47	enum ovpn_mode mode;
48	spinlock_t lock; /* protect writing to the ovpn_priv object */
49	struct ovpn_peer_collection *peers;
50	struct ovpn_peer __rcu *peer;
51	struct gro_cells gro_cells;
52	struct delayed_work keepalive_work;
53};
54
55#endif /* _NET_OVPN_OVPNSTRUCT_H_ */