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ktls: Capture initial tls seqno at time offload is initiated

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Some drivers want the TLS seqno when offload starts. Capture this
for them by adding a union for initial_seqno, sharing space with
the TLS 1.0 next_seqno.

Reviewed by: jhb
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D54275
MFC After: 1 month
This commit is contained in:
Andrew Gallatin 2025-12-20 16:10:12 -05:00
parent 43d7ee540e
commit 4d692068f6
2 changed files with 9 additions and 3 deletions
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3
sys/kern/uipc_ktls.c
View file

@ -1406,6 +1406,9 @@ ktls_enable_tx(struct socket *so, struct tls_enable *en)
if (error)
return (error);
/* some ktls offload NICs require initial seqno to start offload */
tls->initial_offload_seqno = be64dec(en->rec_seq);
/* Prefer TOE -> ifnet TLS -> software TLS. */
#ifdef TCP_OFFLOAD
error = ktls_try_toe(so, tls, KTLS_TX);

9
sys/sys/ktls.h
View file

@ -221,9 +221,12 @@ struct ktls_session {
bool tx;
bool sync_dispatch;
bool sequential_records;
/* Only used for TLS 1.0. */
uint64_t next_seqno;
union {
/* Only used for TLS 1.0. */
uint64_t next_seqno;
/* Needed by some ktls offload NICs */
uint64_t initial_offload_seqno;
};
STAILQ_HEAD(, mbuf) pending_records;
/* Used to destroy any kTLS session */