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a4e9f8e328
With deployments having upwards of 600k peers now, this somewhat heavy
structure could benefit from more fine-grained allocations.
Specifically, instead of using a 2048-byte slab for a 1544-byte object,
we can now use 1544-byte objects directly, thus saving almost 25%
per-peer, or with 600k peers, that's a savings of 303 MiB. This also
makes wireguard's memory usage more transparent in tools like slabtop
and /proc/slabinfo.
Fixes: 8b5553ace8 ("wireguard: queueing: get rid of per-peer ring buffers")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Matthew Wilcox <willy@infradead.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
87 lines
2.2 KiB
C
87 lines
2.2 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_PEER_H
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#define _WG_PEER_H
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#include "device.h"
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#include "noise.h"
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#include "cookie.h"
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#include <linux/types.h>
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#include <linux/netfilter.h>
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#include <linux/spinlock.h>
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#include <linux/kref.h>
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#include <net/dst_cache.h>
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struct wg_device;
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struct endpoint {
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union {
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struct sockaddr addr;
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struct sockaddr_in addr4;
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struct sockaddr_in6 addr6;
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};
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union {
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struct {
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struct in_addr src4;
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/* Essentially the same as addr6->scope_id */
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int src_if4;
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};
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struct in6_addr src6;
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};
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};
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struct wg_peer {
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struct wg_device *device;
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struct prev_queue tx_queue, rx_queue;
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struct sk_buff_head staged_packet_queue;
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int serial_work_cpu;
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bool is_dead;
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struct noise_keypairs keypairs;
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struct endpoint endpoint;
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struct dst_cache endpoint_cache;
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rwlock_t endpoint_lock;
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struct noise_handshake handshake;
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atomic64_t last_sent_handshake;
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struct work_struct transmit_handshake_work, clear_peer_work, transmit_packet_work;
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struct cookie latest_cookie;
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struct hlist_node pubkey_hash;
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u64 rx_bytes, tx_bytes;
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struct timer_list timer_retransmit_handshake, timer_send_keepalive;
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struct timer_list timer_new_handshake, timer_zero_key_material;
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struct timer_list timer_persistent_keepalive;
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unsigned int timer_handshake_attempts;
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u16 persistent_keepalive_interval;
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bool timer_need_another_keepalive;
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bool sent_lastminute_handshake;
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struct timespec64 walltime_last_handshake;
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struct kref refcount;
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struct rcu_head rcu;
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struct list_head peer_list;
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struct list_head allowedips_list;
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struct napi_struct napi;
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u64 internal_id;
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};
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struct wg_peer *wg_peer_create(struct wg_device *wg,
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const u8 public_key[NOISE_PUBLIC_KEY_LEN],
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const u8 preshared_key[NOISE_SYMMETRIC_KEY_LEN]);
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struct wg_peer *__must_check wg_peer_get_maybe_zero(struct wg_peer *peer);
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static inline struct wg_peer *wg_peer_get(struct wg_peer *peer)
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{
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kref_get(&peer->refcount);
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return peer;
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}
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void wg_peer_put(struct wg_peer *peer);
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void wg_peer_remove(struct wg_peer *peer);
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void wg_peer_remove_all(struct wg_device *wg);
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int wg_peer_init(void);
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void wg_peer_uninit(void);
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#endif /* _WG_PEER_H */
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