tls: Fix write space handling

TLS device cannot use the sw context. This patch returns the original
tls device write space handler and moves the sw/device specific portions
to the relevant files.

Also, we remove the write_space call for the tls_sw flow, because it
handles partial records in its delayed tx work handler.

Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for performance")
Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 1cc830582fa8..917caacd4d31 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -2126,6 +2126,19 @@ static void tx_work_handler(struct work_struct *work)
 	release_sock(sk);
 }
 
+void tls_sw_write_space(struct sock *sk, struct tls_context *ctx)
+{
+	struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx);
+
+	/* Schedule the transmission if tx list is ready */
+	if (is_tx_ready(tx_ctx) && !sk->sk_write_pending) {
+		/* Schedule the transmission */
+		if (!test_and_set_bit(BIT_TX_SCHEDULED,
+				      &tx_ctx->tx_bitmask))
+			schedule_delayed_work(&tx_ctx->tx_work.work, 0);
+	}
+}
+
 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);