From b9727d7f957d68febb3b5f68d4be270ee6fb57e7 Mon Sep 17 00:00:00 2001 From: Dirk van der Merwe Date: Wed, 5 Jun 2019 14:11:40 -0700 Subject: [PATCH] net/tls: export TLS per skb encryption While offloading TLS connections, drivers need to handle the case where out of order packets need to be transmitted. Other drivers obtain the entire TLS record for the specific skb to provide as context to hardware for encryption. However, other designs may also want to keep the hardware state intact and perform the out of order encryption entirely on the host. To achieve this, export the already existing software encryption fallback path so drivers could access this. Signed-off-by: Dirk van der Merwe Reviewed-by: Jakub Kicinski Signed-off-by: David S. Miller --- include/net/tls.h | 1 + net/tls/tls_device_fallback.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/include/net/tls.h b/include/net/tls.h index 3da0d941e729..d1a4f365d6be 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -590,6 +590,7 @@ void tls_unregister_device(struct tls_device *device); int tls_device_decrypted(struct sock *sk, struct sk_buff *skb); int decrypt_skb(struct sock *sk, struct sk_buff *skb, struct scatterlist *sgout); +struct sk_buff *tls_encrypt_skb(struct sk_buff *skb); struct sk_buff *tls_validate_xmit_skb(struct sock *sk, struct net_device *dev, diff --git a/net/tls/tls_device_fallback.c b/net/tls/tls_device_fallback.c index 5a087e1981c3..1d2d804ac633 100644 --- a/net/tls/tls_device_fallback.c +++ b/net/tls/tls_device_fallback.c @@ -426,6 +426,12 @@ struct sk_buff *tls_validate_xmit_skb(struct sock *sk, } EXPORT_SYMBOL_GPL(tls_validate_xmit_skb); +struct sk_buff *tls_encrypt_skb(struct sk_buff *skb) +{ + return tls_sw_fallback(skb->sk, skb); +} +EXPORT_SYMBOL_GPL(tls_encrypt_skb); + int tls_sw_fallback_init(struct sock *sk, struct tls_offload_context_tx *offload_ctx, struct tls_crypto_info *crypto_info) -- 2.30.2