net/tcp: Add static_key for TCP-AO

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Similarly to TCP-MD5, add a static key to TCP-AO that is patched out
when there are no keys on a machine and dynamically enabled with the
first setsockopt(TCP_AO) adds a key on any socket. The static key is as
well dynamically disabled later when the socket is destructed.

The lifetime of enabled static key here is the same as ao_info: it is
enabled on allocation, passed over from full socket to twsk and
destructed when ao_info is scheduled for destruction.

Signed-off-by: Dmitry Safonov <dima@arista.com>
Acked-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Dmitry Safonov 2023-10-23 20:22:12 +01:00 • committed by David S. Miller

parent d6732b95b6

commit 67fa83f7c8

6 changed files with 96 additions and 44 deletions

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24

include/net/tcp.h

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2

include/net/tcp_ao.h

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22

net/ipv4/tcp_ao.c

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46

net/ipv4/tcp_input.c

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25

net/ipv4/tcp_ipv4.c

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25

net/ipv6/tcp_ipv6.c

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