net/tls: enable sk_msg redirect to tls socket egress

Bring back tls_sw_sendpage_locked. sk_msg redirection into a socket with TLS_TX takes the following path: tcp_bpf_sendmsg_redir tcp_bpf_push_locked tcp_bpf_push kernel_sendpage_locked sock->ops->sendpage_locked Also update the flags test in tls_sw_sendpage_locked to allow flag MSG_NO_SHARED_FRAGS. bpf_tcp_sendmsg sets this. Link: https://lore.kernel.org/netdev/CA+FuTSdaAawmZ2N8nfDDKu3XLpXBbMtcCT0q4FntDD2gn8ASUw@mail.gmail.com/T/#t Link: https://github.com/wdebruij/kerneltools/commits/icept.2 Fixes: 0608c69 ("bpf: sk_msg, sock{map|hash} redirect through ULP") Fixes: f3de19a ("Revert \"net/tls: remove unused function tls_sw_sendpage_locked\"") Signed-off-by: Willem de Bruijn <[email protected]> Acked-by: John Fastabend <[email protected]> Signed-off-by: David S. Miller <[email protected]>
wafgo · Nov 19, 2019 · d4ffb02 · d4ffb02
1 parent db96c2c
commit d4ffb02
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diff --git a/include/net/tls.h b/include/net/tls.h
@@ -356,6 +356,8 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
 void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
 void tls_sw_strparser_done(struct tls_context *tls_ctx);
 int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
+int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
+			   int offset, size_t size, int flags);
 int tls_sw_sendpage(struct sock *sk, struct page *page,
 		    int offset, size_t size, int flags);
 void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);

diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
@@ -908,6 +908,7 @@ static int __init tls_register(void)
 {
 	tls_sw_proto_ops = inet_stream_ops;
 	tls_sw_proto_ops.splice_read = tls_sw_splice_read;
+	tls_sw_proto_ops.sendpage_locked   = tls_sw_sendpage_locked,
 
 	tls_device_init();
 	tcp_register_ulp(&tcp_tls_ulp_ops);

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
@@ -1204,6 +1204,17 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
 	return copied ? copied : ret;
 }
 
+int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
+			   int offset, size_t size, int flags)
+{
+	if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+		      MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY |
+		      MSG_NO_SHARED_FRAGS))
+		return -ENOTSUPP;
+
+	return tls_sw_do_sendpage(sk, page, offset, size, flags);
+}
+
 int tls_sw_sendpage(struct sock *sk, struct page *page,
 		    int offset, size_t size, int flags)
 {