Merge branch 'net-tls-small-code-cleanup'

Jakub Kicinski says:

====================
net/tls: small code cleanup

This small patch set cleans up tls (mostly offload parts).
Other than avoiding unnecessary error messages - no functional
changes here.

v2 (Saeed):
 - fix up Review tags;
 - remove the warning on failure completely.
====================

Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netdevice.h

@@ -914,34 +914,13 @@ struct xfrmdev_ops {
 };
 #endif
 
-#if IS_ENABLED(CONFIG_TLS_DEVICE)
-enum tls_offload_ctx_dir {
-	TLS_OFFLOAD_CTX_DIR_RX,
-	TLS_OFFLOAD_CTX_DIR_TX,
-};
-
-struct tls_crypto_info;
-struct tls_context;
-
-struct tlsdev_ops {
-	int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
-			   enum tls_offload_ctx_dir direction,
-			   struct tls_crypto_info *crypto_info,
-			   u32 start_offload_tcp_sn);
-	void (*tls_dev_del)(struct net_device *netdev,
-			    struct tls_context *ctx,
-			    enum tls_offload_ctx_dir direction);
-	void (*tls_dev_resync_rx)(struct net_device *netdev,
-				  struct sock *sk, u32 seq, u64 rcd_sn);
-};
-#endif
-
 struct dev_ifalias {
 	struct rcu_head rcuhead;
 	char ifalias[];
 };
 
 struct devlink;
+struct tlsdev_ops;
 
 /*
  * This structure defines the management hooks for network devices.

include/net/tls.h

@@ -277,6 +277,23 @@ struct tls_context {
 	void (*unhash)(struct sock *sk);
 };
 
+enum tls_offload_ctx_dir {
+	TLS_OFFLOAD_CTX_DIR_RX,
+	TLS_OFFLOAD_CTX_DIR_TX,
+};
+
+struct tlsdev_ops {
+	int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
+			   enum tls_offload_ctx_dir direction,
+			   struct tls_crypto_info *crypto_info,
+			   u32 start_offload_tcp_sn);
+	void (*tls_dev_del)(struct net_device *netdev,
+			    struct tls_context *ctx,
+			    enum tls_offload_ctx_dir direction);
+	void (*tls_dev_resync_rx)(struct net_device *netdev,
+				  struct sock *sk, u32 seq, u64 rcd_sn);
+};
+
 struct tls_offload_context_rx {
 	/* sw must be the first member of tls_offload_context_rx */
 	struct tls_sw_context_rx sw;
@@ -317,7 +334,6 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
 int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
 int tls_device_sendpage(struct sock *sk, struct page *page,
 			int offset, size_t size, int flags);
-void tls_device_sk_destruct(struct sock *sk);
 void tls_device_free_resources_tx(struct sock *sk);
 void tls_device_init(void);
 void tls_device_cleanup(void);
@@ -336,7 +352,6 @@ static inline u32 tls_record_start_seq(struct tls_record_info *rec)
 	return rec->end_seq - rec->len;
 }
 
-void tls_sk_destruct(struct sock *sk, struct tls_context *ctx);
 int tls_push_sg(struct sock *sk, struct tls_context *ctx,
 		struct scatterlist *sg, u16 first_offset,
 		int flags);
@@ -547,7 +562,7 @@ static inline void tls_offload_rx_resync_request(struct sock *sk, __be32 seq)
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_offload_context_rx *rx_ctx = tls_offload_ctx_rx(tls_ctx);
 
-	atomic64_set(&rx_ctx->resync_req, ((((uint64_t)seq) << 32) | 1));
+	atomic64_set(&rx_ctx->resync_req, ((u64)ntohl(seq) << 32) | 1);
 }
 
 

net/tls/tls_device.c

@@ -89,22 +89,6 @@ static void tls_device_gc_task(struct work_struct *work)
 	}
 }
 
-static void tls_device_attach(struct tls_context *ctx, struct sock *sk,
-			      struct net_device *netdev)
-{
-	if (sk->sk_destruct != tls_device_sk_destruct) {
-		refcount_set(&ctx->refcount, 1);
-		dev_hold(netdev);
-		ctx->netdev = netdev;
-		spin_lock_irq(&tls_device_lock);
-		list_add_tail(&ctx->list, &tls_device_list);
-		spin_unlock_irq(&tls_device_lock);
-
-		ctx->sk_destruct = sk->sk_destruct;
-		sk->sk_destruct = tls_device_sk_destruct;
-	}
-}
-
 static void tls_device_queue_ctx_destruction(struct tls_context *ctx)
 {
 	unsigned long flags;
@@ -199,7 +183,7 @@ static void tls_icsk_clean_acked(struct sock *sk, u32 acked_seq)
  * socket and no in-flight SKBs associated with this
  * socket, so it is safe to free all the resources.
  */
-void tls_device_sk_destruct(struct sock *sk)
+static void tls_device_sk_destruct(struct sock *sk)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx);
@@ -217,7 +201,6 @@ void tls_device_sk_destruct(struct sock *sk)
 	if (refcount_dec_and_test(&tls_ctx->refcount))
 		tls_device_queue_ctx_destruction(tls_ctx);
 }
-EXPORT_SYMBOL(tls_device_sk_destruct);
 
 void tls_device_free_resources_tx(struct sock *sk)
 {
@@ -584,7 +567,7 @@ void handle_device_resync(struct sock *sk, u32 seq, u64 rcd_sn)
 
 	rx_ctx = tls_offload_ctx_rx(tls_ctx);
 	resync_req = atomic64_read(&rx_ctx->resync_req);
-	req_seq = ntohl(resync_req >> 32) - ((u32)TLS_HEADER_SIZE - 1);
+	req_seq = (resync_req >> 32) - ((u32)TLS_HEADER_SIZE - 1);
 	is_req_pending = resync_req;
 
 	if (unlikely(is_req_pending) && req_seq == seq &&
@@ -682,6 +665,22 @@ int tls_device_decrypted(struct sock *sk, struct sk_buff *skb)
 		tls_device_reencrypt(sk, skb);
 }
 
+static void tls_device_attach(struct tls_context *ctx, struct sock *sk,
+			      struct net_device *netdev)
+{
+	if (sk->sk_destruct != tls_device_sk_destruct) {
+		refcount_set(&ctx->refcount, 1);
+		dev_hold(netdev);
+		ctx->netdev = netdev;
+		spin_lock_irq(&tls_device_lock);
+		list_add_tail(&ctx->list, &tls_device_list);
+		spin_unlock_irq(&tls_device_lock);
+
+		ctx->sk_destruct = sk->sk_destruct;
+		sk->sk_destruct = tls_device_sk_destruct;
+	}
+}
+
 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 {
 	u16 nonce_size, tag_size, iv_size, rec_seq_size;
@@ -865,8 +864,6 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
 	}
 
 	if (!(netdev->features & NETIF_F_HW_TLS_RX)) {
-		pr_err_ratelimited("%s: netdev %s with no TLS offload\n",
-				   __func__, netdev->name);
 		rc = -ENOTSUPP;
 		goto release_netdev;
 	}
@@ -894,11 +891,8 @@ int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
 	rc = netdev->tlsdev_ops->tls_dev_add(netdev, sk, TLS_OFFLOAD_CTX_DIR_RX,
 					     &ctx->crypto_recv.info,
 					     tcp_sk(sk)->copied_seq);
-	if (rc) {
+	if (rc)
-		pr_err_ratelimited("%s: The netdev has refused to offload this socket\n",
-				   __func__);
 		goto free_sw_resources;
-	}
 
 	tls_device_attach(ctx, sk, netdev);
 	goto release_netdev;