1 files changed, 54 insertions, 0 deletions
diff --git a/test/packetdrill/pipe.h b/test/packetdrill/pipe.h
new file mode 100644
index 0000000..6e3561b
--- /dev/null
+++ b/test/packetdrill/pipe.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+/*
+ * Author: weiwan@google.com (Wei Wang)
+ *
+ * Interface for tracking pipes in the kernel under test.
+ */
+
+#ifndef __PIPE_H__
+#define __PIPE_H__
+
+#include "types.h"
+
+#include "fd_state.h"
+
+/* The runtime state for a pipe */
+struct pipe {
+	/* NOTE: struct fd_state must be first field in all fd flavors. */
+	struct fd_state fd;		/* info about fd for this pipe */
+};
+
+/* Convert to pipe pointer if the fd has type FD_PIPE,
+ * otherwise return NULL.
+ */
+static inline struct pipe *fd_to_pipe(struct fd_state *fd)
+{
+	if (fd && fd->ops->type == FD_PIPE)
+		return (struct pipe *)fd;
+	else
+		return NULL;
+}
+
+struct state;
+
+/* Allocate and return a new pipe object. */
+extern struct pipe *pipe_new(struct state *state);
+
+#endif /* __PIPE_H__ */