netdev - [PATCH net-next v2 04/11] tls: rx: remove the message decrypted tracking

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Date:   Thu, 14 Jul 2022 22:22:28 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com,
        borisp@...dia.com, john.fastabend@...il.com, maximmi@...dia.com,
        tariqt@...dia.com, vfedorenko@...ek.ru,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next v2 04/11] tls: rx: remove the message decrypted tracking

We no longer allow a decrypted skb to remain linked to ctx->recv_pkt.
Anything on the list is decrypted, anything on ctx->recv_pkt needs
to be decrypted.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 include/net/strparser.h |  1 -
 net/tls/tls_sw.c        | 10 ----------
 2 files changed, 11 deletions(-)

diff --git a/include/net/strparser.h b/include/net/strparser.h
index 88900b05443e..41e2ce9e9e10 100644
--- a/include/net/strparser.h
+++ b/include/net/strparser.h
@@ -72,7 +72,6 @@ struct sk_skb_cb {
 	/* strp users' data follows */
 	struct tls_msg {
 		u8 control;
-		u8 decrypted;
 	} tls;
 	/* temp_reg is a temporary register used for bpf_convert_data_end_access
 	 * when dst_reg == src_reg.
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index f5f06d1ba024..49cfaa8119c6 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1563,21 +1563,13 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	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;
 
-	if (tlm->decrypted) {
-		darg->zc = false;
-		darg->async = false;
-		return 0;
-	}
-
 	if (tls_ctx->rx_conf == TLS_HW) {
 		err = tls_device_decrypted(sk, tls_ctx, skb, rxm);
 		if (err < 0)
 			return err;
 		if (err > 0) {
-			tlm->decrypted = 1;
 			darg->zc = false;
 			darg->async = false;
 			goto decrypt_done;
@@ -1610,7 +1602,6 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 	rxm->full_len -= pad;
 	rxm->offset += prot->prepend_size;
 	rxm->full_len -= prot->overhead_size;
-	tlm->decrypted = 1;
 decrypt_next:
 	tls_advance_record_sn(sk, prot, &tls_ctx->rx);
 
@@ -2130,7 +2121,6 @@ static int tls_read_size(struct strparser *strp, struct sk_buff *skb)
 	if (ret < 0)
 		goto read_failure;
 
-	tlm->decrypted = 0;
 	tlm->control = header[0];
 
 	data_len = ((header[4] & 0xFF) | (header[3] << 8));
-- 
2.36.1