netdev - [PATCH net-next 10/10] tls: hw: rx: use return value of tls_device

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Message-Id: <20220408033823.965896-11-kuba@kernel.org>
Date:   Thu,  7 Apr 2022 20:38:23 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net, pabeni@...hat.com
Cc:     netdev@...r.kernel.org, borisp@...dia.com,
        john.fastabend@...il.com, daniel@...earbox.net,
        vfedorenko@...ek.ru, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 10/10] tls: hw: rx: use return value of tls_device_decrypted() to carry status

Instead of tls_device poking into internals of the message
return 1 from tls_device_decrypted() if the device handled
the decryption.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 net/tls/tls_device.c | 7 ++-----
 net/tls/tls_sw.c     | 5 ++---
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 78d979e0f298..5e4bd8ba48d3 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -948,7 +948,6 @@ int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
 			 struct sk_buff *skb, struct strp_msg *rxm)
 {
 	struct tls_offload_context_rx *ctx = tls_offload_ctx_rx(tls_ctx);
-	struct tls_msg *tlm = tls_msg(skb);
 	int is_decrypted = skb->decrypted;
 	int is_encrypted = !is_decrypted;
 	struct sk_buff *skb_iter;
@@ -963,11 +962,9 @@ int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
 				   tls_ctx->rx.rec_seq, rxm->full_len,
 				   is_encrypted, is_decrypted);
 
-	tlm->decrypted |= is_decrypted;
-
 	if (unlikely(test_bit(TLS_RX_DEV_DEGRADED, &tls_ctx->flags))) {
 		if (likely(is_encrypted || is_decrypted))
-			return 0;
+			return is_decrypted;
 
 		/* After tls_device_down disables the offload, the next SKB will
 		 * likely have initial fragments decrypted, and final ones not
@@ -982,7 +979,7 @@ int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
 	 */
 	if (is_decrypted) {
 		ctx->resync_nh_reset = 1;
-		return 0;
+		return is_decrypted;
 	}
 	if (is_encrypted) {
 		tls_device_core_ctrl_rx_resync(tls_ctx, ctx, sk, skb);
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index d6ac9deede7b..990450ff9537 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1575,9 +1575,8 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 		err = tls_device_decrypted(sk, tls_ctx, skb, rxm);
 		if (err < 0)
 			return err;
-
-		/* skip SW decryption if NIC handled it already */
-		if (tlm->decrypted) {
+		if (err > 0) {
+			tlm->decrypted = 1;
 			*zc = false;
 			goto decrypt_done;
 		}
-- 
2.34.1