Andrew Gallatin c0e4090e3d ktls: Accurately track if ifnet ktls is enabled ... This allows us to avoid spurious calls to ktls_disable_ifnet() When we implemented ifnet kTLSe, we set a flag in the tx socket buffer (SB_TLS_IFNET) to indicate ifnet kTLS. This flag meant that now, or in the past, ifnet ktls was active on a socket. Later, I added code to switch ifnet ktls sessions to software in the case of lossy TCP connections that have a high retransmit rate. Because TCP was using SB_TLS_IFNET to know if it needed to do math to calculate the retransmit ratio and potentially call into ktls_disable_ifnet(), it was doing unneeded work long after a session was moved to software. This patch carefully tracks whether or not ifnet ktls is still enabled on a TCP connection. Because the inp is now embedded in the tcpcb, and because TCP is the most frequent accessor of this state, it made sense to move this from the socket buffer flags to the tcpcb. Because we now need reliable access to the tcbcb, we take a ref on the inp when creating a tx ktls session. While here, I noticed that rack/bbr were incorrectly implementing tfb_hwtls_change(), and applying the change to all pending sends, when it should apply only to future sends. This change reduces spurious calls to ktls_disable_ifnet() by 95% or so in a Netflix CDN environment. Reviewed by: markj, rrs Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D38380		2023-02-09 12:44:44 -05:00
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bbr.c	ktls: Accurately track if ifnet ktls is enabled	2023-02-09 12:44:44 -05:00
rack_bbr_common.c	IfAPI: Explicitly include <net/if_private.h> in netstack	2023-01-31 15:02:16 -05:00
rack_bbr_common.h
rack.c	ktls: Accurately track if ifnet ktls is enabled	2023-02-09 12:44:44 -05:00
sack_filter.c	tcp: embed inpcb into tcpcb	2022-12-07 09:00:48 -08:00
sack_filter.h
tcp_bbr.h
tcp_rack.h