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886fcee939
Apparently the spinlock on incoming_handshake's skb_queue is highly
contended, and a torrent of handshake or cookie packets can bring the
data plane to its knees, simply by virtue of enqueueing the handshake
packets to be processed asynchronously. So, we try switching this to a
ring buffer to hopefully have less lock contention. This alleviates the
problem somewhat, though it still isn't perfect, so future patches will
have to improve this further. However, it at least doesn't completely
diminish the data plane.
Reported-by: Streun Fabio <fstreun@student.ethz.ch>
Reported-by: Joel Wanner <joel.wanner@inf.ethz.ch>
Fixes: e7096c131e ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#ifndef _WG_DEVICE_H
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#define _WG_DEVICE_H
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#include "noise.h"
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#include "allowedips.h"
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#include "peerlookup.h"
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#include "cookie.h"
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#include <linux/types.h>
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#include <linux/netdevice.h>
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#include <linux/workqueue.h>
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#include <linux/mutex.h>
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#include <linux/net.h>
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#include <linux/ptr_ring.h>
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struct wg_device;
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struct multicore_worker {
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void *ptr;
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struct work_struct work;
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};
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struct crypt_queue {
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struct ptr_ring ring;
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struct multicore_worker __percpu *worker;
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int last_cpu;
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};
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struct prev_queue {
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struct sk_buff *head, *tail, *peeked;
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struct { struct sk_buff *next, *prev; } empty; // Match first 2 members of struct sk_buff.
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atomic_t count;
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};
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struct wg_device {
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struct net_device *dev;
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struct crypt_queue encrypt_queue, decrypt_queue, handshake_queue;
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struct sock __rcu *sock4, *sock6;
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struct net __rcu *creating_net;
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struct noise_static_identity static_identity;
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struct workqueue_struct *packet_crypt_wq,*handshake_receive_wq, *handshake_send_wq;
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struct cookie_checker cookie_checker;
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struct pubkey_hashtable *peer_hashtable;
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struct index_hashtable *index_hashtable;
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struct allowedips peer_allowedips;
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struct mutex device_update_lock, socket_update_lock;
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struct list_head device_list, peer_list;
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atomic_t handshake_queue_len;
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unsigned int num_peers, device_update_gen;
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u32 fwmark;
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u16 incoming_port;
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};
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int wg_device_init(void);
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void wg_device_uninit(void);
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#endif /* _WG_DEVICE_H */
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