linux_dsm_epyc7002/net/tls
Daniel Borkmann d829e9c411 tls: convert to generic sk_msg interface
Convert kTLS over to make use of sk_msg interface for plaintext and
encrypted scattergather data, so it reuses all the sk_msg helpers
and data structure which later on in a second step enables to glue
this to BPF.

This also allows to remove quite a bit of open coded helpers which
are covered by the sk_msg API. Recent changes in kTLs 80ece6a03a
("tls: Remove redundant vars from tls record structure") and
4e6d47206c ("tls: Add support for inplace records encryption")
changed the data path handling a bit; while we've kept the latter
optimization intact, we had to undo the former change to better
fit the sk_msg model, hence the sg_aead_in and sg_aead_out have
been brought back and are linked into the sk_msg sgs. Now the kTLS
record contains a msg_plaintext and msg_encrypted sk_msg each.

In the original code, the zerocopy_from_iter() has been used out
of TX but also RX path. For the strparser skb-based RX path,
we've left the zerocopy_from_iter() in decrypt_internal() mostly
untouched, meaning it has been moved into tls_setup_from_iter()
with charging logic removed (as not used from RX). Given RX path
is not based on sk_msg objects, we haven't pursued setting up a
dummy sk_msg to call into sk_msg_zerocopy_from_iter(), but it
could be an option to prusue in a later step.

Joint work with John.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-15 12:23:19 -07:00
..
Kconfig tls: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00
Makefile net/tls: Add generic NIC offload infrastructure 2018-05-01 09:42:47 -04:00
tls_device_fallback.c tls: zero the crypto information from tls_context before freeing 2018-09-13 12:03:47 -07:00
tls_device.c tls: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00
tls_main.c net/tls: Fixed race condition in async encryption 2018-09-24 12:24:24 -07:00
tls_sw.c tls: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00