diff mbox series

[net-next,10/13] net/tls: export TLS per skb encryption

Message ID 20190605211143.29689-11-jakub.kicinski@netronome.com
State Accepted
Delegated to: David Miller
Headers show
Series nfp: tls: add basic TX offload | expand

Commit Message

Jakub Kicinski June 5, 2019, 9:11 p.m. UTC 
From: Dirk van der Merwe <dirk.vandermerwe@netronome.com>

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 <dirk.vandermerwe@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 include/net/tls.h             | 1 +
 net/tls/tls_device_fallback.c | 6 ++++++
 2 files changed, 7 insertions(+)
diff mbox series

Patch

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)