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886fcee939
linux/drivers/net/wireguard
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Jason A. Donenfeld 886fcee939 wireguard: receive: use ring buffer for incoming handshakes 
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>
2021-11-29 19:50:50 -08:00
..
selftest wireguard: allowedips: free empty intermediate nodes when removing single node 2021-06-04 14:25:14 -07:00
allowedips.c wireguard: allowedips: add missing __rcu annotation to satisfy sparse 2021-11-29 19:50:29 -08:00
allowedips.h wireguard: allowedips: free empty intermediate nodes when removing single node 2021-06-04 14:25:14 -07:00
cookie.c
cookie.h
device.c wireguard: receive: use ring buffer for incoming handshakes 2021-11-29 19:50:50 -08:00
device.h wireguard: receive: use ring buffer for incoming handshakes 2021-11-29 19:50:50 -08:00
main.c wireguard: main: rename 'mod_init' & 'mod_exit' functions to be module-specific 2021-11-29 19:50:30 -08:00
Makefile wireguard: do not use -O3 2021-06-04 14:25:14 -07:00
messages.h wireguard: queueing: preserve flow hash across packet scrubbing 2020-05-20 20:55:09 -07:00
netlink.c netlink: consistently use NLA_POLICY_MIN_LEN() 2020-08-18 12:28:45 -07:00
netlink.h
noise.c wireguard: noise: take lock when removing handshake entry from table 2020-09-09 11:31:37 -07:00
noise.h wireguard: noise: separate receive counter from send counter 2020-05-20 20:55:09 -07:00
peer.c wireguard: peer: allocate in kmem_cache 2021-06-04 14:25:14 -07:00
peer.h wireguard: peer: allocate in kmem_cache 2021-06-04 14:25:14 -07:00
peerlookup.c wireguard: peerlookup: take lock before checking hash in replace operation 2020-09-09 11:31:38 -07:00
peerlookup.h
queueing.c wireguard: receive: use ring buffer for incoming handshakes 2021-11-29 19:50:50 -08:00
queueing.h wireguard: receive: use ring buffer for incoming handshakes 2021-11-29 19:50:50 -08:00
ratelimiter.c
ratelimiter.h
receive.c wireguard: receive: use ring buffer for incoming handshakes 2021-11-29 19:50:50 -08:00
send.c wireguard: queueing: get rid of per-peer ring buffers 2021-02-23 15:59:34 -08:00
socket.c wireguard: device: reset peer src endpoint when netns exits 2021-11-29 19:50:45 -08:00
socket.h
timers.c
timers.h
version.h