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+/*
+ Copyright (c) 2006-2012 Red Hat, Inc. <http://www.redhat.com>
+ This file is part of GlusterFS.
+
+ GlusterFS 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 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS 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, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _POSIX_AIO_H
+#define _POSIX_AIO_H
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "glusterfs.h"
+
+// Maximum number of concurrently submitted IO events. The heaviest load
+// GlusterFS has been able to handle had 60-80 concurrent calls
+#define POSIX_AIO_MAX_NR_EVENTS 256
+
+// Maximum number of completed IO operations to reap per getevents syscall
+#define POSIX_AIO_MAX_NR_GETEVENTS 16
+
+
+int posix_aio_on (xlator_t *this);
+int posix_aio_off (xlator_t *this);
+
+int posix_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
+ off_t offset, uint32_t flags, dict_t *xdata);
+
+int posix_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ struct iovec *vector, int32_t count, off_t offset,
+ uint32_t flags, struct iobref *iobref, dict_t *xdata);
+
+#endif /* !_POSIX_AIO_H */