netdev - [PATCH net-next 04/10] tls: rx: don't store the decryption status in socket context

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Message-Id: <20220408033823.965896-5-kuba@kernel.org>
Date:   Thu,  7 Apr 2022 20:38:17 -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 04/10] tls: rx: don't store the decryption status in socket context

Similar justification to previous change, the information
about decryption status belongs in the skb.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 include/net/strparser.h |  1 +
 include/net/tls.h       |  1 -
 net/tls/tls_device.c    |  3 ++-
 net/tls/tls_sw.c        | 10 ++++++----
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/include/net/strparser.h b/include/net/strparser.h
index c271543076cf..a191486eb1e4 100644
--- a/include/net/strparser.h
+++ b/include/net/strparser.h
@@ -72,6 +72,7 @@ struct sk_skb_cb {
 	u64 temp_reg;
 	struct tls_msg {
 		u8 control;
+		u8 decrypted;
 	} tls;
 };
 
diff --git a/include/net/tls.h b/include/net/tls.h
index c3717cd1f1cd..f040edc97c50 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -148,7 +148,6 @@ struct tls_sw_context_rx {
 
 	struct sk_buff *recv_pkt;
 	u8 async_capable:1;
-	u8 decrypted:1;
 	atomic_t decrypt_pending;
 	/* protect crypto_wait with decrypt_pending*/
 	spinlock_t decrypt_compl_lock;
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 12f7b56771d9..78d979e0f298 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -948,6 +948,7 @@ 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;
@@ -962,7 +963,7 @@ int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
 				   tls_ctx->rx.rec_seq, rxm->full_len,
 				   is_encrypted, is_decrypted);
 
-	ctx->sw.decrypted |= is_decrypted;
+	tlm->decrypted |= is_decrypted;
 
 	if (unlikely(test_bit(TLS_RX_DEV_DEGRADED, &tls_ctx->flags))) {
 		if (likely(is_encrypted || is_decrypted))
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 222f8cad1e8c..167bd133b7f8 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1565,9 +1565,10 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
 	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct strp_msg *rxm = strp_msg(skb);
+	struct tls_msg *tlm = tls_msg(skb);
 	int pad, err = 0;
 
-	if (!ctx->decrypted) {
+	if (!tlm->decrypted) {
 		if (tls_ctx->rx_conf == TLS_HW) {
 			err = tls_device_decrypted(sk, tls_ctx, skb, rxm);
 			if (err < 0)
@@ -1575,7 +1576,7 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 		}
 
 		/* Still not decrypted after tls_device */
-		if (!ctx->decrypted) {
+		if (!tlm->decrypted) {
 			err = decrypt_internal(sk, skb, dest, NULL, chunk, zc,
 					       async);
 			if (err < 0) {
@@ -1599,7 +1600,7 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 		rxm->offset += prot->prepend_size;
 		rxm->full_len -= prot->overhead_size;
 		tls_advance_record_sn(sk, prot, &tls_ctx->rx);
-		ctx->decrypted = 1;
+		tlm->decrypted = 1;
 		ctx->saved_data_ready(sk);
 	} else {
 		*zc = false;
@@ -2144,8 +2145,9 @@ static void tls_queue(struct strparser *strp, struct sk_buff *skb)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(strp->sk);
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
+	struct tls_msg *tlm = tls_msg(skb);
 
-	ctx->decrypted = 0;
+	tlm->decrypted = 0;
 
 	ctx->recv_pkt = skb;
 	strp_pause(strp);
-- 
2.34.1