1 files changed, 51 insertions, 0 deletions
diff --git a/epoll_ctl.h b/epoll_ctl.h
new file mode 100644
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--- /dev/null
+++ b/epoll_ctl.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright Red Hat
+ * Author: Laurent Vivier <lvivier@redhat.com>
+ */
+
+#ifndef EPOLL_CTL_H
+#define EPOLL_CTL_H
+
+#include <sys/epoll.h>
+
+#include "util.h"
+#include "passt.h"
+#include "epoll_type.h"
+#include "flow.h"
+#include "tcp.h"
+#include "udp.h"
+
+/**
+ * union epoll_ref - Breakdown of reference for epoll fd bookkeeping
+ * @type:	Type of fd (tells us what to do with events)
+ * @fd:		File descriptor number (implies < 2^24 total descriptors)
+ * @flow:	Index of the flow this fd is linked to
+ * @tcp_listen:	TCP-specific reference part for listening sockets
+ * @udp:	UDP-specific reference part
+ * @data:	Data handled by protocol handlers
+ * @nsdir_fd:	netns dirfd for fallback timer checking if namespace is gone
+ * @queue:	vhost-user queue index for this fd
+ * @u64:	Opaque reference for epoll_ctl() and epoll_wait()
+ */
+union epoll_ref {
+	struct {
+		enum epoll_type type:8;
+		int32_t		  fd:FD_REF_BITS;
+		union {
+			uint32_t flow;
+			flow_sidx_t flowside;
+			union tcp_listen_epoll_ref tcp_listen;
+			union udp_listen_epoll_ref udp;
+			uint32_t data;
+			int nsdir_fd;
+			int queue;
+		};
+	};
+	uint64_t u64;
+};
+static_assert(sizeof(union epoll_ref) <= sizeof(union epoll_data),
+	      "epoll_ref must have same size as epoll_data");
+
+int epoll_add(int epollfd, uint32_t events, union epoll_ref ref);
+void epoll_del(int epollfd, int fd);
+#endif /* EPOLL_CTL_H */