tls: replace poll implementation with read hook
Instead of re-implementing poll routine use the poll callback to
trigger read from kTLS, we reuse the stream_memory_read callback
which is simpler and achieves the same. This helps to align sockmap
and kTLS so we can more easily embed BPF in kTLS.
Joint work with Daniel.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index b428069..e90b6d5 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -620,12 +620,14 @@ static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage;
prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE];
- prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg;
- prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close;
+ prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg;
+ prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read;
+ prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close;
prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE];
- prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg;
- prot[TLS_SW][TLS_SW].close = tls_sk_proto_close;
+ prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg;
+ prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read;
+ prot[TLS_SW][TLS_SW].close = tls_sk_proto_close;
#ifdef CONFIG_TLS_DEVICE
prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
@@ -724,7 +726,6 @@ static int __init tls_register(void)
build_protos(tls_prots[TLSV4], &tcp_prot);
tls_sw_proto_ops = inet_stream_ops;
- tls_sw_proto_ops.poll = tls_sw_poll;
tls_sw_proto_ops.splice_read = tls_sw_splice_read;
#ifdef CONFIG_TLS_DEVICE
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 5043b0b..3b75e0d 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1352,23 +1352,15 @@ ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
return copied ? : err;
}
-unsigned int tls_sw_poll(struct file *file, struct socket *sock,
- struct poll_table_struct *wait)
+bool tls_sw_stream_read(const struct sock *sk)
{
- unsigned int ret;
- struct sock *sk = sock->sk;
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
- /* Grab POLLOUT and POLLHUP from the underlying socket */
- ret = ctx->sk_poll(file, sock, wait);
-
- /* Clear POLLIN bits, and set based on recv_pkt */
- ret &= ~(POLLIN | POLLRDNORM);
if (ctx->recv_pkt)
- ret |= POLLIN | POLLRDNORM;
+ return true;
- return ret;
+ return false;
}
static int tls_read_size(struct strparser *strp, struct sk_buff *skb)
@@ -1686,8 +1678,6 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
sk->sk_data_ready = tls_data_ready;
write_unlock_bh(&sk->sk_callback_lock);
- sw_ctx_rx->sk_poll = sk->sk_socket->ops->poll;
-
strp_check_rcv(&sw_ctx_rx->strp);
}